ASM Long
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Neural Long Context Assembly Transpilation
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19 items
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650914.c | /*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/bn.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/rsa.h>
#include <openssl/dsa.h>
#ifndef OPENSSL_NO_STDIO
int X509_REQ_print_fp(FILE *fp, X509_REQ *x)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
X509err(X509_F_X509_REQ_PRINT_FP, ERR_R_BUF_LIB);
return 0;
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = X509_REQ_print(b, x);
BIO_free(b);
return ret;
}
#endif
int X509_REQ_print_ex(BIO *bp, X509_REQ *x, unsigned long nmflags,
unsigned long cflag)
{
long l;
int i;
EVP_PKEY *pkey;
STACK_OF(X509_EXTENSION) *exts;
char mlch = ' ';
int nmindent = 0;
if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
mlch = '\n';
nmindent = 12;
}
if (nmflags == X509_FLAG_COMPAT)
nmindent = 16;
if (!(cflag & X509_FLAG_NO_HEADER)) {
if (BIO_write(bp, "Certificate Request:\n", 21) <= 0)
goto err;
if (BIO_write(bp, " Data:\n", 10) <= 0)
goto err;
}
if (!(cflag & X509_FLAG_NO_VERSION)) {
l = X509_REQ_get_version(x);
if (l >= 0 && l <= 2) {
if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n", "", l + 1, (unsigned long)l) <= 0)
goto err;
} else {
if (BIO_printf(bp, "%8sVersion: Unknown (%ld)\n", "", l) <= 0)
goto err;
}
}
if (!(cflag & X509_FLAG_NO_SUBJECT)) {
if (BIO_printf(bp, " Subject:%c", mlch) <= 0)
goto err;
if (X509_NAME_print_ex(bp, X509_REQ_get_subject_name(x),
nmindent, nmflags) < 0)
goto err;
if (BIO_write(bp, "\n", 1) <= 0)
goto err;
}
if (!(cflag & X509_FLAG_NO_PUBKEY)) {
X509_PUBKEY *xpkey;
ASN1_OBJECT *koid;
if (BIO_write(bp, " Subject Public Key Info:\n", 33) <= 0)
goto err;
if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
goto err;
xpkey = X509_REQ_get_X509_PUBKEY(x);
X509_PUBKEY_get0_param(&koid, NULL, NULL, NULL, xpkey);
if (i2a_ASN1_OBJECT(bp, koid) <= 0)
goto err;
if (BIO_puts(bp, "\n") <= 0)
goto err;
pkey = X509_REQ_get0_pubkey(x);
if (pkey == NULL) {
BIO_printf(bp, "%12sUnable to load Public Key\n", "");
ERR_print_errors(bp);
} else {
EVP_PKEY_print_public(bp, pkey, 16, NULL);
}
}
if (!(cflag & X509_FLAG_NO_ATTRIBUTES)) {
/* may not be */
if (BIO_printf(bp, "%8sAttributes:\n", "") <= 0)
goto err;
if (X509_REQ_get_attr_count(x) == 0) {
if (BIO_printf(bp, "%12sa0:00\n", "") <= 0)
goto err;
} else {
for (i = 0; i < X509_REQ_get_attr_count(x); i++) {
ASN1_TYPE *at;
X509_ATTRIBUTE *a;
ASN1_BIT_STRING *bs = NULL;
ASN1_OBJECT *aobj;
int j, type = 0, count = 1, ii = 0;
a = X509_REQ_get_attr(x, i);
aobj = X509_ATTRIBUTE_get0_object(a);
if (X509_REQ_extension_nid(OBJ_obj2nid(aobj)))
continue;
if (BIO_printf(bp, "%12s", "") <= 0)
goto err;
if ((j = i2a_ASN1_OBJECT(bp, aobj)) > 0) {
ii = 0;
count = X509_ATTRIBUTE_count(a);
get_next:
at = X509_ATTRIBUTE_get0_type(a, ii);
type = at->type;
bs = at->value.asn1_string;
}
for (j = 25 - j; j > 0; j--)
if (BIO_write(bp, " ", 1) != 1)
goto err;
if (BIO_puts(bp, ":") <= 0)
goto err;
if ((type == V_ASN1_PRINTABLESTRING) ||
(type == V_ASN1_T61STRING) ||
(type == V_ASN1_UTF8STRING) ||
(type == V_ASN1_IA5STRING)) {
if (BIO_write(bp, (char *)bs->data, bs->length)
!= bs->length)
goto err;
BIO_puts(bp, "\n");
} else {
BIO_puts(bp, "unable to print attribute\n");
}
if (++ii < count)
goto get_next;
}
}
}
if (!(cflag & X509_FLAG_NO_EXTENSIONS)) {
exts = X509_REQ_get_extensions(x);
if (exts) {
BIO_printf(bp, "%8sRequested Extensions:\n", "");
for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
ASN1_OBJECT *obj;
X509_EXTENSION *ex;
int critical;
ex = sk_X509_EXTENSION_value(exts, i);
if (BIO_printf(bp, "%12s", "") <= 0)
goto err;
obj = X509_EXTENSION_get_object(ex);
i2a_ASN1_OBJECT(bp, obj);
critical = X509_EXTENSION_get_critical(ex);
if (BIO_printf(bp, ": %s\n", critical ? "critical" : "") <= 0)
goto err;
if (!X509V3_EXT_print(bp, ex, cflag, 16)) {
BIO_printf(bp, "%16s", "");
ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex));
}
if (BIO_write(bp, "\n", 1) <= 0)
goto err;
}
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
}
}
if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
const X509_ALGOR *sig_alg;
const ASN1_BIT_STRING *sig;
X509_REQ_get0_signature(x, &sig, &sig_alg);
if (!X509_signature_print(bp, sig_alg, sig))
goto err;
}
return 1;
err:
X509err(X509_F_X509_REQ_PRINT_EX, ERR_R_BUF_LIB);
return 0;
}
int X509_REQ_print(BIO *bp, X509_REQ *x)
{
return X509_REQ_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
}
|
376587.c | /* clonePos.c - create table for clonePos. */
/* Copyright (C) 2013 The Regents of the University of California
* See kent/LICENSE or http://genome.ucsc.edu/license/ for licensing information. */
#include "common.h"
#include "linefile.h"
#include "portable.h"
#include "hash.h"
#include "jksql.h"
#include "hdb.h"
#include "psl.h"
#include "glDbRep.h"
char *mapFile = "/projects/compbio/experiments/hg/clonemap.wu/jun15a.wu";
char *infFile = "/projects/cc/hg/gs.2/ffa/sequence.inf";
char *posName = "clonePos.tab";
char *aliName = "cloneAliPos.tab";
void usage()
/* Explain usage and exit. */
{
errAbort(
"clonePos - make clonePos and cloneAliPos tables\n"
"usage:\n"
" clonePos here\n"
"This will make clonePos.tab and cloneAliPos.tab in the current dir");
}
struct cloneInfo
/* Info on one clone. */
{
struct cloneInfo *next; /* Next in list. */
char *name; /* Name of clone. */
int size; /* Clone size. */
int phase; /* HTG Phase. */
struct clonePos *pos; /* Position in chromosome. */
struct clonePos *aliPos; /* Position of alignment in chromosome. */
};
struct clonePos
/* Position of a clone. */
{
struct clonePos *next; /* Next in list. */
struct cloneInfo *info; /* Info about clone. */
int start, end; /* Offset within contig. */
};
int cmpClonePos(const void *va, const void *vb)
/* Compare two slNames. */
{
const struct clonePos *a = *((struct clonePos **)va);
const struct clonePos *b = *((struct clonePos **)vb);
return a->start - b->start;
}
void readSeqInfo(char *fileName, struct hash **pHash, struct cloneInfo **pList)
/* Read info about clones. */
{
struct lineFile *lf;
struct hash *hash = newHash(16);
struct hashEl *hel;
struct cloneInfo *infoList = NULL, *info;
int lineSize, wordCount;
char *line, *words[16];
char *acc;
char c;
lf = lineFileOpen(fileName, TRUE);
if (!lineFileNext(lf, &line, &lineSize))
errAbort("Empty %s", fileName);
if (!startsWith("#Accession.ver", line))
errAbort("Unrecognized format on %s", fileName);
while (lineFileNext(lf, &line, &lineSize))
{
if (line[0] == '#')
continue;
wordCount = chopLine(line,words);
if (wordCount != 8)
errAbort("Expecting 8 words line %d of %s", lf->lineIx, lf->fileName);
AllocVar(info);
acc = words[0];
if (hashLookup(hash, acc) != NULL)
errAbort("Duplicate %s line %d of %s", acc, lf->lineIx, lf->fileName);
hel = hashAdd(hash, acc, info);
info->name = hel->name;
info->size = atoi(words[2]);
if (info->size == 0)
errAbort("Expecting clone size field 2 of line %d of %s",
lf->lineIx, lf->fileName);
c = words[3][0];
if (c == '0' || c == '1' || c == '2' || c == '3')
info->phase = atoi(words[3]);
else
errAbort("Expecting phase field 3 of line %d of %s",
lf->lineIx, lf->fileName);
slAddHead(&infoList, info);
}
lineFileClose(&lf);
slReverse(&infoList);
*pList = infoList;
*pHash = hash;
}
struct cloneInfo *findClone(struct hash *cloneHash, char *name)
/* Find named clone in hash table. */
{
struct hashEl *hel;
if ((hel = hashLookup(cloneHash, name)) == NULL)
errAbort("Clone %s is not in %s", name, infFile);
return hel->val;
}
void fragNameToCloneName(char *cloneName)
/* Chop off suffix to get clone name. */
{
char *s = strchr(cloneName, '_');
if (s != NULL)
*s = 0;
}
void writePosList(char *fileName, struct clonePos *posList, char *chromName)
/* Write out tab-delimited position list. */
{
struct clonePos *pos;
struct cloneInfo *info;
FILE *f = mustOpen(fileName, "w");
printf("Writing %d entries to %s\n", slCount(posList), fileName);
for (pos = posList; pos != NULL; pos = pos->next)
{
info = pos->info;
fprintf(f, "%s\t%d\t%d\t%s\t%d\t%d\n",
info->name, info->size, info->phase, chromName, pos->start, pos->end);
}
fclose(f);
}
void clonePosTab(char *fileName, struct hash *cloneHash)
/* Write out clonePos.tab. */
{
char query[256];
struct sqlResult *sr;
char **row;
struct clonePos *posList = NULL, *pos;
struct gl gl;
struct cloneInfo *info;
struct sqlConnection *conn = hAllocConn();
sqlSafef(query, sizeof query, "select * from chr18_gl");
sr = sqlGetResult(conn, query);
while ((row = sqlNextRow(sr)) != NULL)
{
glStaticLoad(row, &gl);
fragNameToCloneName(gl.frag);
info = findClone(cloneHash, gl.frag);
if ((pos = info->pos) == NULL)
{
AllocVar(pos);
pos->info = info;
info->pos = pos;
pos->start = gl.start;
pos->end = gl.end;
slAddHead(&posList, pos);
}
else
{
if (pos->start > gl.start)
pos->start = gl.start;
if (pos->end < gl.end)
pos->end = gl.end;
}
}
sqlFreeResult(&sr);
hFreeConn(&conn);
slSort(&posList, cmpClonePos);
writePosList(fileName, posList, "chr18");
}
void cloneAliPosTab(char *fileName, struct hash *cloneHash)
/* Write out clonePos.tab. */
{
char query[256];
struct sqlResult *sr;
char **row;
struct clonePos *posList = NULL, *pos;
struct cloneInfo *info;
struct sqlConnection *conn = hAllocConn();
sqlSafef(query, sizeof query, "select * from chr18_frags");
sr = sqlGetResult(conn, query);
while ((row = sqlNextRow(sr)) != NULL)
{
struct psl *psl = pslLoad(row);
fragNameToCloneName(psl->qName);
info = findClone(cloneHash, psl->qName);
if ((pos = info->aliPos) == NULL)
{
AllocVar(pos);
pos->info = info;
info->aliPos = pos;
pos->start = psl->tStart;
pos->end = psl->tEnd;
slAddHead(&posList, pos);
}
else
{
if (pos->start > psl->tStart)
pos->start = psl->tStart;
if (pos->end < psl->tEnd)
pos->end = psl->tEnd;
}
pslFree(&psl);
}
sqlFreeResult(&sr);
hFreeConn(&conn);
slSort(&posList, cmpClonePos);
writePosList(fileName, posList, "chr18");
}
void clonePos()
/* create tables for clonePos. */
{
struct cloneInfo *infoList, *info;
struct clonePos *aliList, *posList, *pos;
struct hash *cloneHash;
uglyf("mysqlHost is %s\n", mysqlHost());
readSeqInfo(infFile, &cloneHash, &infoList);
clonePosTab(posName, cloneHash);
cloneAliPosTab(aliName, cloneHash);
}
int main(int argc, char *argv[])
{
if (argc != 2)
usage();
clonePos();
}
|
178959.c | /*
* Copyright (c) 1993, 1994, 1995, 1996, 1998
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/param.h> /* optionally get BSD define */
#include <sys/socket.h>
#include <time.h>
/*
* <net/bpf.h> defines ioctls, but doesn't include <sys/ioccom.h>.
*
* We include <sys/ioctl.h> as it might be necessary to declare ioctl();
* at least on *BSD and macOS, it also defines various SIOC ioctls -
* we could include <sys/sockio.h>, but if we're already including
* <sys/ioctl.h>, which includes <sys/sockio.h> on those platforms,
* there's not much point in doing so.
*
* If we have <sys/ioccom.h>, we include it as well, to handle systems
* such as Solaris which don't arrange to include <sys/ioccom.h> if you
* include <sys/ioctl.h>
*/
#include <sys/ioctl.h>
#ifdef HAVE_SYS_IOCCOM_H
#include <sys/ioccom.h>
#endif
#include <sys/utsname.h>
#if defined(__FreeBSD__) && defined(SIOCIFCREATE2)
/*
* Add support for capturing on FreeBSD usbusN interfaces.
*/
static const char usbus_prefix[] = "usbus";
#define USBUS_PREFIX_LEN (sizeof(usbus_prefix) - 1)
#include <dirent.h>
#endif
#include <net/if.h>
#ifdef _AIX
/*
* Make "pcap.h" not include "pcap/bpf.h"; we are going to include the
* native OS version, as we need "struct bpf_config" from it.
*/
#define PCAP_DONT_INCLUDE_PCAP_BPF_H
#include <sys/types.h>
/*
* Prevent bpf.h from redefining the DLT_ values to their
* IFT_ values, as we're going to return the standard libpcap
* values, not IBM's non-standard IFT_ values.
*/
#undef _AIX
#include <net/bpf.h>
#define _AIX
/*
* If both BIOCROTZBUF and BPF_BUFMODE_ZBUF are defined, we have
* zero-copy BPF.
*/
#if defined(BIOCROTZBUF) && defined(BPF_BUFMODE_ZBUF)
#define HAVE_ZEROCOPY_BPF
#include <sys/mman.h>
#include <machine/atomic.h>
#endif
#include <net/if_types.h> /* for IFT_ values */
#include <sys/sysconfig.h>
#include <sys/device.h>
#include <sys/cfgodm.h>
#include <cf.h>
#ifdef __64BIT__
#define domakedev makedev64
#define getmajor major64
#define bpf_hdr bpf_hdr32
#else /* __64BIT__ */
#define domakedev makedev
#define getmajor major
#endif /* __64BIT__ */
#define BPF_NAME "bpf"
#define BPF_MINORS 4
#define DRIVER_PATH "/usr/lib/drivers"
#define BPF_NODE "/dev/bpf"
static int bpfloadedflag = 0;
static int odmlockid = 0;
static int bpf_load(char *errbuf);
#else /* _AIX */
#include <net/bpf.h>
#endif /* _AIX */
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef SIOCGIFMEDIA
# include <net/if_media.h>
#endif
#include "pcap-int.h"
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
/*
* Later versions of NetBSD stick padding in front of FDDI frames
* to align the IP header on a 4-byte boundary.
*/
#if defined(__NetBSD__) && __NetBSD_Version__ > 106000000
#define PCAP_FDDIPAD 3
#endif
/*
* Private data for capturing on BPF devices.
*/
struct pcap_bpf {
#ifdef HAVE_ZEROCOPY_BPF
/*
* Zero-copy read buffer -- for zero-copy BPF. 'buffer' above will
* alternative between these two actual mmap'd buffers as required.
* As there is a header on the front size of the mmap'd buffer, only
* some of the buffer is exposed to libpcap as a whole via bufsize;
* zbufsize is the true size. zbuffer tracks the current zbuf
* assocated with buffer so that it can be used to decide which the
* next buffer to read will be.
*/
u_char *zbuf1, *zbuf2, *zbuffer;
u_int zbufsize;
u_int zerocopy;
u_int interrupted;
struct timespec firstsel;
/*
* If there's currently a buffer being actively processed, then it is
* referenced here; 'buffer' is also pointed at it, but offset by the
* size of the header.
*/
struct bpf_zbuf_header *bzh;
int nonblock; /* true if in nonblocking mode */
#endif /* HAVE_ZEROCOPY_BPF */
char *device; /* device name */
int filtering_in_kernel; /* using kernel filter */
int must_do_on_close; /* stuff we must do when we close */
};
/*
* Stuff to do when we close.
*/
#define MUST_CLEAR_RFMON 0x00000001 /* clear rfmon (monitor) mode */
#define MUST_DESTROY_USBUS 0x00000002 /* destroy usbusN interface */
#ifdef BIOCGDLTLIST
# if (defined(HAVE_NET_IF_MEDIA_H) && defined(IFM_IEEE80211)) && !defined(__APPLE__)
#define HAVE_BSD_IEEE80211
/*
* The ifm_ulist member of a struct ifmediareq is an int * on most systems,
* but it's a uint64_t on newer versions of OpenBSD.
*
* We check this by checking whether IFM_GMASK is defined and > 2^32-1.
*/
# if defined(IFM_GMASK) && IFM_GMASK > 0xFFFFFFFF
# define IFM_ULIST_TYPE uint64_t
# else
# define IFM_ULIST_TYPE int
# endif
# endif
# if defined(__APPLE__) || defined(HAVE_BSD_IEEE80211)
static int find_802_11(struct bpf_dltlist *);
# ifdef HAVE_BSD_IEEE80211
static int monitor_mode(pcap_t *, int);
# endif
# if defined(__APPLE__)
static void remove_non_802_11(pcap_t *);
static void remove_802_11(pcap_t *);
# endif
# endif /* defined(__APPLE__) || defined(HAVE_BSD_IEEE80211) */
#endif /* BIOCGDLTLIST */
#if defined(sun) && defined(LIFNAMSIZ) && defined(lifr_zoneid)
#include <zone.h>
#endif
/*
* We include the OS's <net/bpf.h>, not our "pcap/bpf.h", so we probably
* don't get DLT_DOCSIS defined.
*/
#ifndef DLT_DOCSIS
#define DLT_DOCSIS 143
#endif
/*
* In some versions of macOS, we might not even get any of the
* 802.11-plus-radio-header DLT_'s defined, even though some
* of them are used by various Airport drivers in those versions.
*/
#ifndef DLT_PRISM_HEADER
#define DLT_PRISM_HEADER 119
#endif
#ifndef DLT_AIRONET_HEADER
#define DLT_AIRONET_HEADER 120
#endif
#ifndef DLT_IEEE802_11_RADIO
#define DLT_IEEE802_11_RADIO 127
#endif
#ifndef DLT_IEEE802_11_RADIO_AVS
#define DLT_IEEE802_11_RADIO_AVS 163
#endif
static int pcap_can_set_rfmon_bpf(pcap_t *p);
static int pcap_activate_bpf(pcap_t *p);
static int pcap_setfilter_bpf(pcap_t *p, struct bpf_program *fp);
static int pcap_setdirection_bpf(pcap_t *, pcap_direction_t);
static int pcap_set_datalink_bpf(pcap_t *p, int dlt);
/*
* For zerocopy bpf, the setnonblock/getnonblock routines need to modify
* pb->nonblock so we don't call select(2) if the pcap handle is in non-
* blocking mode.
*/
static int
pcap_getnonblock_bpf(pcap_t *p)
{
#ifdef HAVE_ZEROCOPY_BPF
struct pcap_bpf *pb = p->priv;
if (pb->zerocopy)
return (pb->nonblock);
#endif
return (pcap_getnonblock_fd(p));
}
static int
pcap_setnonblock_bpf(pcap_t *p, int nonblock)
{
#ifdef HAVE_ZEROCOPY_BPF
struct pcap_bpf *pb = p->priv;
if (pb->zerocopy) {
pb->nonblock = nonblock;
return (0);
}
#endif
return (pcap_setnonblock_fd(p, nonblock));
}
#ifdef HAVE_ZEROCOPY_BPF
/*
* Zero-copy BPF buffer routines to check for and acknowledge BPF data in
* shared memory buffers.
*
* pcap_next_zbuf_shm(): Check for a newly available shared memory buffer,
* and set up p->buffer and cc to reflect one if available. Notice that if
* there was no prior buffer, we select zbuf1 as this will be the first
* buffer filled for a fresh BPF session.
*/
static int
pcap_next_zbuf_shm(pcap_t *p, int *cc)
{
struct pcap_bpf *pb = p->priv;
struct bpf_zbuf_header *bzh;
if (pb->zbuffer == pb->zbuf2 || pb->zbuffer == NULL) {
bzh = (struct bpf_zbuf_header *)pb->zbuf1;
if (bzh->bzh_user_gen !=
atomic_load_acq_int(&bzh->bzh_kernel_gen)) {
pb->bzh = bzh;
pb->zbuffer = (u_char *)pb->zbuf1;
p->buffer = pb->zbuffer + sizeof(*bzh);
*cc = bzh->bzh_kernel_len;
return (1);
}
} else if (pb->zbuffer == pb->zbuf1) {
bzh = (struct bpf_zbuf_header *)pb->zbuf2;
if (bzh->bzh_user_gen !=
atomic_load_acq_int(&bzh->bzh_kernel_gen)) {
pb->bzh = bzh;
pb->zbuffer = (u_char *)pb->zbuf2;
p->buffer = pb->zbuffer + sizeof(*bzh);
*cc = bzh->bzh_kernel_len;
return (1);
}
}
*cc = 0;
return (0);
}
/*
* pcap_next_zbuf() -- Similar to pcap_next_zbuf_shm(), except wait using
* select() for data or a timeout, and possibly force rotation of the buffer
* in the event we time out or are in immediate mode. Invoke the shared
* memory check before doing system calls in order to avoid doing avoidable
* work.
*/
static int
pcap_next_zbuf(pcap_t *p, int *cc)
{
struct pcap_bpf *pb = p->priv;
struct bpf_zbuf bz;
struct timeval tv;
struct timespec cur;
fd_set r_set;
int data, r;
int expire, tmout;
#define TSTOMILLI(ts) (((ts)->tv_sec * 1000) + ((ts)->tv_nsec / 1000000))
/*
* Start out by seeing whether anything is waiting by checking the
* next shared memory buffer for data.
*/
data = pcap_next_zbuf_shm(p, cc);
if (data)
return (data);
/*
* If a previous sleep was interrupted due to signal delivery, make
* sure that the timeout gets adjusted accordingly. This requires
* that we analyze when the timeout should be been expired, and
* subtract the current time from that. If after this operation,
* our timeout is less then or equal to zero, handle it like a
* regular timeout.
*/
tmout = p->opt.timeout;
if (tmout)
(void) clock_gettime(CLOCK_MONOTONIC, &cur);
if (pb->interrupted && p->opt.timeout) {
expire = TSTOMILLI(&pb->firstsel) + p->opt.timeout;
tmout = expire - TSTOMILLI(&cur);
#undef TSTOMILLI
if (tmout <= 0) {
pb->interrupted = 0;
data = pcap_next_zbuf_shm(p, cc);
if (data)
return (data);
if (ioctl(p->fd, BIOCROTZBUF, &bz) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno, "BIOCROTZBUF");
return (PCAP_ERROR);
}
return (pcap_next_zbuf_shm(p, cc));
}
}
/*
* No data in the buffer, so must use select() to wait for data or
* the next timeout. Note that we only call select if the handle
* is in blocking mode.
*/
if (!pb->nonblock) {
FD_ZERO(&r_set);
FD_SET(p->fd, &r_set);
if (tmout != 0) {
tv.tv_sec = tmout / 1000;
tv.tv_usec = (tmout * 1000) % 1000000;
}
r = select(p->fd + 1, &r_set, NULL, NULL,
p->opt.timeout != 0 ? &tv : NULL);
if (r < 0 && errno == EINTR) {
if (!pb->interrupted && p->opt.timeout) {
pb->interrupted = 1;
pb->firstsel = cur;
}
return (0);
} else if (r < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "select");
return (PCAP_ERROR);
}
}
pb->interrupted = 0;
/*
* Check again for data, which may exist now that we've either been
* woken up as a result of data or timed out. Try the "there's data"
* case first since it doesn't require a system call.
*/
data = pcap_next_zbuf_shm(p, cc);
if (data)
return (data);
/*
* Try forcing a buffer rotation to dislodge timed out or immediate
* data.
*/
if (ioctl(p->fd, BIOCROTZBUF, &bz) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCROTZBUF");
return (PCAP_ERROR);
}
return (pcap_next_zbuf_shm(p, cc));
}
/*
* Notify kernel that we are done with the buffer. We don't reset zbuffer so
* that we know which buffer to use next time around.
*/
static int
pcap_ack_zbuf(pcap_t *p)
{
struct pcap_bpf *pb = p->priv;
atomic_store_rel_int(&pb->bzh->bzh_user_gen,
pb->bzh->bzh_kernel_gen);
pb->bzh = NULL;
p->buffer = NULL;
return (0);
}
#endif /* HAVE_ZEROCOPY_BPF */
pcap_t *
pcap_create_interface(const char *device _U_, char *ebuf)
{
pcap_t *p;
p = pcap_create_common(ebuf, sizeof (struct pcap_bpf));
if (p == NULL)
return (NULL);
p->activate_op = pcap_activate_bpf;
p->can_set_rfmon_op = pcap_can_set_rfmon_bpf;
#ifdef BIOCSTSTAMP
/*
* We claim that we support microsecond and nanosecond time
* stamps.
*/
p->tstamp_precision_count = 2;
p->tstamp_precision_list = malloc(2 * sizeof(u_int));
if (p->tstamp_precision_list == NULL) {
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, errno,
"malloc");
free(p);
return (NULL);
}
p->tstamp_precision_list[0] = PCAP_TSTAMP_PRECISION_MICRO;
p->tstamp_precision_list[1] = PCAP_TSTAMP_PRECISION_NANO;
#endif /* BIOCSTSTAMP */
return (p);
}
/*
* On success, returns a file descriptor for a BPF device.
* On failure, returns a PCAP_ERROR_ value, and sets p->errbuf.
*/
static int
bpf_open(char *errbuf)
{
int fd = -1;
static const char cloning_device[] = "/dev/bpf";
int n = 0;
char device[sizeof "/dev/bpf0000000000"];
static int no_cloning_bpf = 0;
#ifdef _AIX
/*
* Load the bpf driver, if it isn't already loaded,
* and create the BPF device entries, if they don't
* already exist.
*/
if (bpf_load(errbuf) == PCAP_ERROR)
return (PCAP_ERROR);
#endif
/*
* First, unless we've already tried opening /dev/bpf and
* gotten ENOENT, try opening /dev/bpf.
* If it fails with ENOENT, remember that, so we don't try
* again, and try /dev/bpfN.
*/
if (!no_cloning_bpf &&
(fd = open(cloning_device, O_RDWR)) == -1 &&
((errno != EACCES && errno != ENOENT) ||
(fd = open(cloning_device, O_RDONLY)) == -1)) {
if (errno != ENOENT) {
if (errno == EACCES)
fd = PCAP_ERROR_PERM_DENIED;
else
fd = PCAP_ERROR;
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "(cannot open device) %s", cloning_device);
return (fd);
}
no_cloning_bpf = 1;
}
if (no_cloning_bpf) {
/*
* We don't have /dev/bpf.
* Go through all the /dev/bpfN minors and find one
* that isn't in use.
*/
do {
(void)pcap_snprintf(device, sizeof(device), "/dev/bpf%d", n++);
/*
* Initially try a read/write open (to allow the inject
* method to work). If that fails due to permission
* issues, fall back to read-only. This allows a
* non-root user to be granted specific access to pcap
* capabilities via file permissions.
*
* XXX - we should have an API that has a flag that
* controls whether to open read-only or read-write,
* so that denial of permission to send (or inability
* to send, if sending packets isn't supported on
* the device in question) can be indicated at open
* time.
*/
fd = open(device, O_RDWR);
if (fd == -1 && errno == EACCES)
fd = open(device, O_RDONLY);
} while (fd < 0 && errno == EBUSY);
}
/*
* XXX better message for all minors used
*/
if (fd < 0) {
switch (errno) {
case ENOENT:
fd = PCAP_ERROR;
if (n == 1) {
/*
* /dev/bpf0 doesn't exist, which
* means we probably have no BPF
* devices.
*/
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"(there are no BPF devices)");
} else {
/*
* We got EBUSY on at least one
* BPF device, so we have BPF
* devices, but all the ones
* that exist are busy.
*/
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"(all BPF devices are busy)");
}
break;
case EACCES:
/*
* Got EACCES on the last device we tried,
* and EBUSY on all devices before that,
* if any.
*/
fd = PCAP_ERROR_PERM_DENIED;
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "(cannot open BPF device) %s", device);
break;
default:
/*
* Some other problem.
*/
fd = PCAP_ERROR;
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "(cannot open BPF device) %s", device);
break;
}
}
return (fd);
}
/*
* Open and bind to a device; used if we're not actually going to use
* the device, but are just testing whether it can be opened, or opening
* it to get information about it.
*
* Returns an error code on failure (always negative), and an FD for
* the now-bound BPF device on success (always non-negative).
*/
static int
bpf_open_and_bind(const char *name, char *errbuf)
{
int fd;
struct ifreq ifr;
/*
* First, open a BPF device.
*/
fd = bpf_open(errbuf);
if (fd < 0)
return (fd); /* fd is the appropriate error code */
/*
* Now bind to the device.
*/
(void)strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) {
switch (errno) {
case ENXIO:
/*
* There's no such device.
*/
close(fd);
return (PCAP_ERROR_NO_SUCH_DEVICE);
case ENETDOWN:
/*
* Return a "network down" indication, so that
* the application can report that rather than
* saying we had a mysterious failure and
* suggest that they report a problem to the
* libpcap developers.
*/
close(fd);
return (PCAP_ERROR_IFACE_NOT_UP);
default:
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETIF: %s", name);
close(fd);
return (PCAP_ERROR);
}
}
/*
* Success.
*/
return (fd);
}
#ifdef BIOCGDLTLIST
static int
get_dlt_list(int fd, int v, struct bpf_dltlist *bdlp, char *ebuf)
{
memset(bdlp, 0, sizeof(*bdlp));
if (ioctl(fd, BIOCGDLTLIST, (caddr_t)bdlp) == 0) {
u_int i;
int is_ethernet;
bdlp->bfl_list = (u_int *) malloc(sizeof(u_int) * (bdlp->bfl_len + 1));
if (bdlp->bfl_list == NULL) {
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "malloc");
return (PCAP_ERROR);
}
if (ioctl(fd, BIOCGDLTLIST, (caddr_t)bdlp) < 0) {
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "BIOCGDLTLIST");
free(bdlp->bfl_list);
return (PCAP_ERROR);
}
/*
* OK, for real Ethernet devices, add DLT_DOCSIS to the
* list, so that an application can let you choose it,
* in case you're capturing DOCSIS traffic that a Cisco
* Cable Modem Termination System is putting out onto
* an Ethernet (it doesn't put an Ethernet header onto
* the wire, it puts raw DOCSIS frames out on the wire
* inside the low-level Ethernet framing).
*
* A "real Ethernet device" is defined here as a device
* that has a link-layer type of DLT_EN10MB and that has
* no alternate link-layer types; that's done to exclude
* 802.11 interfaces (which might or might not be the
* right thing to do, but I suspect it is - Ethernet <->
* 802.11 bridges would probably badly mishandle frames
* that don't have Ethernet headers).
*
* On Solaris with BPF, Ethernet devices also offer
* DLT_IPNET, so we, if DLT_IPNET is defined, we don't
* treat it as an indication that the device isn't an
* Ethernet.
*/
if (v == DLT_EN10MB) {
is_ethernet = 1;
for (i = 0; i < bdlp->bfl_len; i++) {
if (bdlp->bfl_list[i] != DLT_EN10MB
#ifdef DLT_IPNET
&& bdlp->bfl_list[i] != DLT_IPNET
#endif
) {
is_ethernet = 0;
break;
}
}
if (is_ethernet) {
/*
* We reserved one more slot at the end of
* the list.
*/
bdlp->bfl_list[bdlp->bfl_len] = DLT_DOCSIS;
bdlp->bfl_len++;
}
}
} else {
/*
* EINVAL just means "we don't support this ioctl on
* this device"; don't treat it as an error.
*/
if (errno != EINVAL) {
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "BIOCGDLTLIST");
return (PCAP_ERROR);
}
}
return (0);
}
#endif
#if defined(__APPLE__)
static int
pcap_can_set_rfmon_bpf(pcap_t *p)
{
struct utsname osinfo;
struct ifreq ifr;
int fd;
#ifdef BIOCGDLTLIST
struct bpf_dltlist bdl;
#endif
/*
* The joys of monitor mode on Mac OS X/OS X/macOS.
*
* Prior to 10.4, it's not supported at all.
*
* In 10.4, if adapter enN supports monitor mode, there's a
* wltN adapter corresponding to it; you open it, instead of
* enN, to get monitor mode. You get whatever link-layer
* headers it supplies.
*
* In 10.5, and, we assume, later releases, if adapter enN
* supports monitor mode, it offers, among its selectable
* DLT_ values, values that let you get the 802.11 header;
* selecting one of those values puts the adapter into monitor
* mode (i.e., you can't get 802.11 headers except in monitor
* mode, and you can't get Ethernet headers in monitor mode).
*/
if (uname(&osinfo) == -1) {
/*
* Can't get the OS version; just say "no".
*/
return (0);
}
/*
* We assume osinfo.sysname is "Darwin", because
* __APPLE__ is defined. We just check the version.
*/
if (osinfo.release[0] < '8' && osinfo.release[1] == '.') {
/*
* 10.3 (Darwin 7.x) or earlier.
* Monitor mode not supported.
*/
return (0);
}
if (osinfo.release[0] == '8' && osinfo.release[1] == '.') {
/*
* 10.4 (Darwin 8.x). s/en/wlt/, and check
* whether the device exists.
*/
if (strncmp(p->opt.device, "en", 2) != 0) {
/*
* Not an enN device; no monitor mode.
*/
return (0);
}
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "socket");
return (PCAP_ERROR);
}
pcap_strlcpy(ifr.ifr_name, "wlt", sizeof(ifr.ifr_name));
pcap_strlcat(ifr.ifr_name, p->opt.device + 2, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
/*
* No such device?
*/
close(fd);
return (0);
}
close(fd);
return (1);
}
#ifdef BIOCGDLTLIST
/*
* Everything else is 10.5 or later; for those,
* we just open the enN device, and check whether
* we have any 802.11 devices.
*
* First, open a BPF device.
*/
fd = bpf_open(p->errbuf);
if (fd < 0)
return (fd); /* fd is the appropriate error code */
/*
* Now bind to the device.
*/
(void)strncpy(ifr.ifr_name, p->opt.device, sizeof(ifr.ifr_name));
if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) {
switch (errno) {
case ENXIO:
/*
* There's no such device.
*/
close(fd);
return (PCAP_ERROR_NO_SUCH_DEVICE);
case ENETDOWN:
/*
* Return a "network down" indication, so that
* the application can report that rather than
* saying we had a mysterious failure and
* suggest that they report a problem to the
* libpcap developers.
*/
close(fd);
return (PCAP_ERROR_IFACE_NOT_UP);
default:
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETIF: %s", p->opt.device);
close(fd);
return (PCAP_ERROR);
}
}
/*
* We know the default link type -- now determine all the DLTs
* this interface supports. If this fails with EINVAL, it's
* not fatal; we just don't get to use the feature later.
* (We don't care about DLT_DOCSIS, so we pass DLT_NULL
* as the default DLT for this adapter.)
*/
if (get_dlt_list(fd, DLT_NULL, &bdl, p->errbuf) == PCAP_ERROR) {
close(fd);
return (PCAP_ERROR);
}
if (find_802_11(&bdl) != -1) {
/*
* We have an 802.11 DLT, so we can set monitor mode.
*/
free(bdl.bfl_list);
close(fd);
return (1);
}
free(bdl.bfl_list);
close(fd);
#endif /* BIOCGDLTLIST */
return (0);
}
#elif defined(HAVE_BSD_IEEE80211)
static int
pcap_can_set_rfmon_bpf(pcap_t *p)
{
int ret;
ret = monitor_mode(p, 0);
if (ret == PCAP_ERROR_RFMON_NOTSUP)
return (0); /* not an error, just a "can't do" */
if (ret == 0)
return (1); /* success */
return (ret);
}
#else
static int
pcap_can_set_rfmon_bpf(pcap_t *p _U_)
{
return (0);
}
#endif
static int
pcap_stats_bpf(pcap_t *p, struct pcap_stat *ps)
{
struct bpf_stat s;
/*
* "ps_recv" counts packets handed to the filter, not packets
* that passed the filter. This includes packets later dropped
* because we ran out of buffer space.
*
* "ps_drop" counts packets dropped inside the BPF device
* because we ran out of buffer space. It doesn't count
* packets dropped by the interface driver. It counts
* only packets that passed the filter.
*
* Both statistics include packets not yet read from the kernel
* by libpcap, and thus not yet seen by the application.
*/
if (ioctl(p->fd, BIOCGSTATS, (caddr_t)&s) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCGSTATS");
return (PCAP_ERROR);
}
ps->ps_recv = s.bs_recv;
ps->ps_drop = s.bs_drop;
ps->ps_ifdrop = 0;
return (0);
}
static int
pcap_read_bpf(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
{
struct pcap_bpf *pb = p->priv;
int cc;
int n = 0;
register u_char *bp, *ep;
u_char *datap;
#ifdef PCAP_FDDIPAD
register u_int pad;
#endif
#ifdef HAVE_ZEROCOPY_BPF
int i;
#endif
again:
/*
* Has "pcap_breakloop()" been called?
*/
if (p->break_loop) {
/*
* Yes - clear the flag that indicates that it
* has, and return PCAP_ERROR_BREAK to indicate
* that we were told to break out of the loop.
*/
p->break_loop = 0;
return (PCAP_ERROR_BREAK);
}
cc = p->cc;
if (p->cc == 0) {
/*
* When reading without zero-copy from a file descriptor, we
* use a single buffer and return a length of data in the
* buffer. With zero-copy, we update the p->buffer pointer
* to point at whatever underlying buffer contains the next
* data and update cc to reflect the data found in the
* buffer.
*/
#ifdef HAVE_ZEROCOPY_BPF
if (pb->zerocopy) {
if (p->buffer != NULL)
pcap_ack_zbuf(p);
i = pcap_next_zbuf(p, &cc);
if (i == 0)
goto again;
if (i < 0)
return (PCAP_ERROR);
} else
#endif
{
cc = read(p->fd, p->buffer, p->bufsize);
}
if (cc < 0) {
/* Don't choke when we get ptraced */
switch (errno) {
case EINTR:
goto again;
#ifdef _AIX
case EFAULT:
/*
* Sigh. More AIX wonderfulness.
*
* For some unknown reason the uiomove()
* operation in the bpf kernel extension
* used to copy the buffer into user
* space sometimes returns EFAULT. I have
* no idea why this is the case given that
* a kernel debugger shows the user buffer
* is correct. This problem appears to
* be mostly mitigated by the memset of
* the buffer before it is first used.
* Very strange.... Shaun Clowes
*
* In any case this means that we shouldn't
* treat EFAULT as a fatal error; as we
* don't have an API for returning
* a "some packets were dropped since
* the last packet you saw" indication,
* we just ignore EFAULT and keep reading.
*/
goto again;
#endif
case EWOULDBLOCK:
return (0);
case ENXIO: /* FreeBSD, DragonFly BSD, and Darwin */
case EIO: /* OpenBSD */
/* NetBSD appears not to return an error in this case */
/*
* The device on which we're capturing
* went away.
*
* XXX - we should really return
* an appropriate error for that,
* but pcap_dispatch() etc. aren't
* documented as having error returns
* other than PCAP_ERROR or PCAP_ERROR_BREAK.
*/
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"The interface disappeared");
return (PCAP_ERROR);
#if defined(sun) && !defined(BSD) && !defined(__svr4__) && !defined(__SVR4)
/*
* Due to a SunOS bug, after 2^31 bytes, the kernel
* file offset overflows and read fails with EINVAL.
* The lseek() to 0 will fix things.
*/
case EINVAL:
if (lseek(p->fd, 0L, SEEK_CUR) +
p->bufsize < 0) {
(void)lseek(p->fd, 0L, SEEK_SET);
goto again;
}
/* fall through */
#endif
}
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "read");
return (PCAP_ERROR);
}
bp = (u_char *)p->buffer;
} else
bp = p->bp;
/*
* Loop through each packet.
*/
#ifdef BIOCSTSTAMP
#define bhp ((struct bpf_xhdr *)bp)
#else
#define bhp ((struct bpf_hdr *)bp)
#endif
ep = bp + cc;
#ifdef PCAP_FDDIPAD
pad = p->fddipad;
#endif
while (bp < ep) {
register u_int caplen, hdrlen;
/*
* Has "pcap_breakloop()" been called?
* If so, return immediately - if we haven't read any
* packets, clear the flag and return PCAP_ERROR_BREAK
* to indicate that we were told to break out of the loop,
* otherwise leave the flag set, so that the *next* call
* will break out of the loop without having read any
* packets, and return the number of packets we've
* processed so far.
*/
if (p->break_loop) {
p->bp = bp;
p->cc = ep - bp;
/*
* ep is set based on the return value of read(),
* but read() from a BPF device doesn't necessarily
* return a value that's a multiple of the alignment
* value for BPF_WORDALIGN(). However, whenever we
* increment bp, we round up the increment value by
* a value rounded up by BPF_WORDALIGN(), so we
* could increment bp past ep after processing the
* last packet in the buffer.
*
* We treat ep < bp as an indication that this
* happened, and just set p->cc to 0.
*/
if (p->cc < 0)
p->cc = 0;
if (n == 0) {
p->break_loop = 0;
return (PCAP_ERROR_BREAK);
} else
return (n);
}
caplen = bhp->bh_caplen;
hdrlen = bhp->bh_hdrlen;
datap = bp + hdrlen;
/*
* Short-circuit evaluation: if using BPF filter
* in kernel, no need to do it now - we already know
* the packet passed the filter.
*
#ifdef PCAP_FDDIPAD
* Note: the filter code was generated assuming
* that p->fddipad was the amount of padding
* before the header, as that's what's required
* in the kernel, so we run the filter before
* skipping that padding.
#endif
*/
if (pb->filtering_in_kernel ||
bpf_filter(p->fcode.bf_insns, datap, bhp->bh_datalen, caplen)) {
struct pcap_pkthdr pkthdr;
#ifdef BIOCSTSTAMP
struct bintime bt;
bt.sec = bhp->bh_tstamp.bt_sec;
bt.frac = bhp->bh_tstamp.bt_frac;
if (p->opt.tstamp_precision == PCAP_TSTAMP_PRECISION_NANO) {
struct timespec ts;
bintime2timespec(&bt, &ts);
pkthdr.ts.tv_sec = ts.tv_sec;
pkthdr.ts.tv_usec = ts.tv_nsec;
} else {
struct timeval tv;
bintime2timeval(&bt, &tv);
pkthdr.ts.tv_sec = tv.tv_sec;
pkthdr.ts.tv_usec = tv.tv_usec;
}
#else
pkthdr.ts.tv_sec = bhp->bh_tstamp.tv_sec;
#ifdef _AIX
/*
* AIX's BPF returns seconds/nanoseconds time
* stamps, not seconds/microseconds time stamps.
*/
pkthdr.ts.tv_usec = bhp->bh_tstamp.tv_usec/1000;
#else
pkthdr.ts.tv_usec = bhp->bh_tstamp.tv_usec;
#endif
#endif /* BIOCSTSTAMP */
#ifdef PCAP_FDDIPAD
if (caplen > pad)
pkthdr.caplen = caplen - pad;
else
pkthdr.caplen = 0;
if (bhp->bh_datalen > pad)
pkthdr.len = bhp->bh_datalen - pad;
else
pkthdr.len = 0;
datap += pad;
#else
pkthdr.caplen = caplen;
pkthdr.len = bhp->bh_datalen;
#endif
(*callback)(user, &pkthdr, datap);
bp += BPF_WORDALIGN(caplen + hdrlen);
if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) {
p->bp = bp;
p->cc = ep - bp;
/*
* See comment above about p->cc < 0.
*/
if (p->cc < 0)
p->cc = 0;
return (n);
}
} else {
/*
* Skip this packet.
*/
bp += BPF_WORDALIGN(caplen + hdrlen);
}
}
#undef bhp
p->cc = 0;
return (n);
}
static int
pcap_inject_bpf(pcap_t *p, const void *buf, size_t size)
{
int ret;
ret = write(p->fd, buf, size);
#ifdef __APPLE__
if (ret == -1 && errno == EAFNOSUPPORT) {
/*
* In some versions of macOS, there's a bug wherein setting
* the BIOCSHDRCMPLT flag causes writes to fail; see, for
* example:
*
* http://cerberus.sourcefire.com/~jeff/archives/patches/macosx/BIOCSHDRCMPLT-10.3.3.patch
*
* So, if, on macOS, we get EAFNOSUPPORT from the write, we
* assume it's due to that bug, and turn off that flag
* and try again. If we succeed, it either means that
* somebody applied the fix from that URL, or other patches
* for that bug from
*
* http://cerberus.sourcefire.com/~jeff/archives/patches/macosx/
*
* and are running a Darwin kernel with those fixes, or
* that Apple fixed the problem in some macOS release.
*/
u_int spoof_eth_src = 0;
if (ioctl(p->fd, BIOCSHDRCMPLT, &spoof_eth_src) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "send: can't turn off BIOCSHDRCMPLT");
return (PCAP_ERROR);
}
/*
* Now try the write again.
*/
ret = write(p->fd, buf, size);
}
#endif /* __APPLE__ */
if (ret == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "send");
return (PCAP_ERROR);
}
return (ret);
}
#ifdef _AIX
static int
bpf_odminit(char *errbuf)
{
char *errstr;
if (odm_initialize() == -1) {
if (odm_err_msg(odmerrno, &errstr) == -1)
errstr = "Unknown error";
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"bpf_load: odm_initialize failed: %s",
errstr);
return (PCAP_ERROR);
}
if ((odmlockid = odm_lock("/etc/objrepos/config_lock", ODM_WAIT)) == -1) {
if (odm_err_msg(odmerrno, &errstr) == -1)
errstr = "Unknown error";
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"bpf_load: odm_lock of /etc/objrepos/config_lock failed: %s",
errstr);
(void)odm_terminate();
return (PCAP_ERROR);
}
return (0);
}
static int
bpf_odmcleanup(char *errbuf)
{
char *errstr;
if (odm_unlock(odmlockid) == -1) {
if (errbuf != NULL) {
if (odm_err_msg(odmerrno, &errstr) == -1)
errstr = "Unknown error";
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"bpf_load: odm_unlock failed: %s",
errstr);
}
return (PCAP_ERROR);
}
if (odm_terminate() == -1) {
if (errbuf != NULL) {
if (odm_err_msg(odmerrno, &errstr) == -1)
errstr = "Unknown error";
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"bpf_load: odm_terminate failed: %s",
errstr);
}
return (PCAP_ERROR);
}
return (0);
}
static int
bpf_load(char *errbuf)
{
long major;
int *minors;
int numminors, i, rc;
char buf[1024];
struct stat sbuf;
struct bpf_config cfg_bpf;
struct cfg_load cfg_ld;
struct cfg_kmod cfg_km;
/*
* This is very very close to what happens in the real implementation
* but I've fixed some (unlikely) bug situations.
*/
if (bpfloadedflag)
return (0);
if (bpf_odminit(errbuf) == PCAP_ERROR)
return (PCAP_ERROR);
major = genmajor(BPF_NAME);
if (major == -1) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "bpf_load: genmajor failed");
(void)bpf_odmcleanup(NULL);
return (PCAP_ERROR);
}
minors = getminor(major, &numminors, BPF_NAME);
if (!minors) {
minors = genminor("bpf", major, 0, BPF_MINORS, 1, 1);
if (!minors) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "bpf_load: genminor failed");
(void)bpf_odmcleanup(NULL);
return (PCAP_ERROR);
}
}
if (bpf_odmcleanup(errbuf) == PCAP_ERROR)
return (PCAP_ERROR);
rc = stat(BPF_NODE "0", &sbuf);
if (rc == -1 && errno != ENOENT) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "bpf_load: can't stat %s", BPF_NODE "0");
return (PCAP_ERROR);
}
if (rc == -1 || getmajor(sbuf.st_rdev) != major) {
for (i = 0; i < BPF_MINORS; i++) {
pcap_snprintf(buf, sizeof(buf), "%s%d", BPF_NODE, i);
unlink(buf);
if (mknod(buf, S_IRUSR | S_IFCHR, domakedev(major, i)) == -1) {
pcap_fmt_errmsg_for_errno(errbuf,
PCAP_ERRBUF_SIZE, errno,
"bpf_load: can't mknod %s", buf);
return (PCAP_ERROR);
}
}
}
/* Check if the driver is loaded */
memset(&cfg_ld, 0x0, sizeof(cfg_ld));
pcap_snprintf(buf, sizeof(buf), "%s/%s", DRIVER_PATH, BPF_NAME);
cfg_ld.path = buf;
if ((sysconfig(SYS_QUERYLOAD, (void *)&cfg_ld, sizeof(cfg_ld)) == -1) ||
(cfg_ld.kmid == 0)) {
/* Driver isn't loaded, load it now */
if (sysconfig(SYS_SINGLELOAD, (void *)&cfg_ld, sizeof(cfg_ld)) == -1) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "bpf_load: could not load driver");
return (PCAP_ERROR);
}
}
/* Configure the driver */
cfg_km.cmd = CFG_INIT;
cfg_km.kmid = cfg_ld.kmid;
cfg_km.mdilen = sizeof(cfg_bpf);
cfg_km.mdiptr = (void *)&cfg_bpf;
for (i = 0; i < BPF_MINORS; i++) {
cfg_bpf.devno = domakedev(major, i);
if (sysconfig(SYS_CFGKMOD, (void *)&cfg_km, sizeof(cfg_km)) == -1) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "bpf_load: could not configure driver");
return (PCAP_ERROR);
}
}
bpfloadedflag = 1;
return (0);
}
#endif
/*
* Undo any operations done when opening the device when necessary.
*/
static void
pcap_cleanup_bpf(pcap_t *p)
{
struct pcap_bpf *pb = p->priv;
#ifdef HAVE_BSD_IEEE80211
int sock;
struct ifmediareq req;
struct ifreq ifr;
#endif
if (pb->must_do_on_close != 0) {
/*
* There's something we have to do when closing this
* pcap_t.
*/
#ifdef HAVE_BSD_IEEE80211
if (pb->must_do_on_close & MUST_CLEAR_RFMON) {
/*
* We put the interface into rfmon mode;
* take it out of rfmon mode.
*
* XXX - if somebody else wants it in rfmon
* mode, this code cannot know that, so it'll take
* it out of rfmon mode.
*/
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == -1) {
fprintf(stderr,
"Can't restore interface flags (socket() failed: %s).\n"
"Please adjust manually.\n",
strerror(errno));
} else {
memset(&req, 0, sizeof(req));
strncpy(req.ifm_name, pb->device,
sizeof(req.ifm_name));
if (ioctl(sock, SIOCGIFMEDIA, &req) < 0) {
fprintf(stderr,
"Can't restore interface flags (SIOCGIFMEDIA failed: %s).\n"
"Please adjust manually.\n",
strerror(errno));
} else {
if (req.ifm_current & IFM_IEEE80211_MONITOR) {
/*
* Rfmon mode is currently on;
* turn it off.
*/
memset(&ifr, 0, sizeof(ifr));
(void)strncpy(ifr.ifr_name,
pb->device,
sizeof(ifr.ifr_name));
ifr.ifr_media =
req.ifm_current & ~IFM_IEEE80211_MONITOR;
if (ioctl(sock, SIOCSIFMEDIA,
&ifr) == -1) {
fprintf(stderr,
"Can't restore interface flags (SIOCSIFMEDIA failed: %s).\n"
"Please adjust manually.\n",
strerror(errno));
}
}
}
close(sock);
}
}
#endif /* HAVE_BSD_IEEE80211 */
#if defined(__FreeBSD__) && defined(SIOCIFCREATE2)
/*
* Attempt to destroy the usbusN interface that we created.
*/
if (pb->must_do_on_close & MUST_DESTROY_USBUS) {
if (if_nametoindex(pb->device) > 0) {
int s;
s = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (s >= 0) {
pcap_strlcpy(ifr.ifr_name, pb->device,
sizeof(ifr.ifr_name));
ioctl(s, SIOCIFDESTROY, &ifr);
close(s);
}
}
}
#endif /* defined(__FreeBSD__) && defined(SIOCIFCREATE2) */
/*
* Take this pcap out of the list of pcaps for which we
* have to take the interface out of some mode.
*/
pcap_remove_from_pcaps_to_close(p);
pb->must_do_on_close = 0;
}
#ifdef HAVE_ZEROCOPY_BPF
if (pb->zerocopy) {
/*
* Delete the mappings. Note that p->buffer gets
* initialized to one of the mmapped regions in
* this case, so do not try and free it directly;
* null it out so that pcap_cleanup_live_common()
* doesn't try to free it.
*/
if (pb->zbuf1 != MAP_FAILED && pb->zbuf1 != NULL)
(void) munmap(pb->zbuf1, pb->zbufsize);
if (pb->zbuf2 != MAP_FAILED && pb->zbuf2 != NULL)
(void) munmap(pb->zbuf2, pb->zbufsize);
p->buffer = NULL;
}
#endif
if (pb->device != NULL) {
free(pb->device);
pb->device = NULL;
}
pcap_cleanup_live_common(p);
}
static int
check_setif_failure(pcap_t *p, int error)
{
#ifdef __APPLE__
int fd;
struct ifreq ifr;
int err;
#endif
if (error == ENXIO) {
/*
* No such device exists.
*/
#ifdef __APPLE__
if (p->opt.rfmon && strncmp(p->opt.device, "wlt", 3) == 0) {
/*
* Monitor mode was requested, and we're trying
* to open a "wltN" device. Assume that this
* is 10.4 and that we were asked to open an
* "enN" device; if that device exists, return
* "monitor mode not supported on the device".
*/
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd != -1) {
pcap_strlcpy(ifr.ifr_name, "en",
sizeof(ifr.ifr_name));
pcap_strlcat(ifr.ifr_name, p->opt.device + 3,
sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
/*
* We assume this failed because
* the underlying device doesn't
* exist.
*/
err = PCAP_ERROR_NO_SUCH_DEVICE;
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno,
"SIOCGIFFLAGS on %s failed",
ifr.ifr_name);
} else {
/*
* The underlying "enN" device
* exists, but there's no
* corresponding "wltN" device;
* that means that the "enN"
* device doesn't support
* monitor mode, probably because
* it's an Ethernet device rather
* than a wireless device.
*/
err = PCAP_ERROR_RFMON_NOTSUP;
}
close(fd);
} else {
/*
* We can't find out whether there's
* an underlying "enN" device, so
* just report "no such device".
*/
err = PCAP_ERROR_NO_SUCH_DEVICE;
pcap_fmt_errmsg_for_errno(p->errbuf,
errno, PCAP_ERRBUF_SIZE,
"socket() failed");
}
return (err);
}
#endif
/*
* No such device.
*/
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETIF failed");
return (PCAP_ERROR_NO_SUCH_DEVICE);
} else if (errno == ENETDOWN) {
/*
* Return a "network down" indication, so that
* the application can report that rather than
* saying we had a mysterious failure and
* suggest that they report a problem to the
* libpcap developers.
*/
return (PCAP_ERROR_IFACE_NOT_UP);
} else {
/*
* Some other error; fill in the error string, and
* return PCAP_ERROR.
*/
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETIF: %s", p->opt.device);
return (PCAP_ERROR);
}
}
/*
* Default capture buffer size.
* 32K isn't very much for modern machines with fast networks; we
* pick .5M, as that's the maximum on at least some systems with BPF.
*
* However, on AIX 3.5, the larger buffer sized caused unrecoverable
* read failures under stress, so we leave it as 32K; yet another
* place where AIX's BPF is broken.
*/
#ifdef _AIX
#define DEFAULT_BUFSIZE 32768
#else
#define DEFAULT_BUFSIZE 524288
#endif
static int
pcap_activate_bpf(pcap_t *p)
{
struct pcap_bpf *pb = p->priv;
int status = 0;
#ifdef HAVE_BSD_IEEE80211
int retv;
#endif
int fd;
#ifdef LIFNAMSIZ
char *zonesep;
struct lifreq ifr;
char *ifrname = ifr.lifr_name;
const size_t ifnamsiz = sizeof(ifr.lifr_name);
#else
struct ifreq ifr;
char *ifrname = ifr.ifr_name;
const size_t ifnamsiz = sizeof(ifr.ifr_name);
#endif
struct bpf_version bv;
#ifdef __APPLE__
int sockfd;
char *wltdev = NULL;
#endif
#ifdef BIOCGDLTLIST
struct bpf_dltlist bdl;
#if defined(__APPLE__) || defined(HAVE_BSD_IEEE80211)
int new_dlt;
#endif
#endif /* BIOCGDLTLIST */
#if defined(BIOCGHDRCMPLT) && defined(BIOCSHDRCMPLT)
u_int spoof_eth_src = 1;
#endif
u_int v;
struct bpf_insn total_insn;
struct bpf_program total_prog;
struct utsname osinfo;
int have_osinfo = 0;
#ifdef HAVE_ZEROCOPY_BPF
struct bpf_zbuf bz;
u_int bufmode, zbufmax;
#endif
fd = bpf_open(p->errbuf);
if (fd < 0) {
status = fd;
goto bad;
}
p->fd = fd;
if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCVERSION");
status = PCAP_ERROR;
goto bad;
}
if (bv.bv_major != BPF_MAJOR_VERSION ||
bv.bv_minor < BPF_MINOR_VERSION) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"kernel bpf filter out of date");
status = PCAP_ERROR;
goto bad;
}
/*
* Turn a negative snapshot value (invalid), a snapshot value of
* 0 (unspecified), or a value bigger than the normal maximum
* value, into the maximum allowed value.
*
* If some application really *needs* a bigger snapshot
* length, we should just increase MAXIMUM_SNAPLEN.
*/
if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
p->snapshot = MAXIMUM_SNAPLEN;
#if defined(LIFNAMSIZ) && defined(ZONENAME_MAX) && defined(lifr_zoneid)
/*
* Retrieve the zoneid of the zone we are currently executing in.
*/
if ((ifr.lifr_zoneid = getzoneid()) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "getzoneid()");
status = PCAP_ERROR;
goto bad;
}
/*
* Check if the given source datalink name has a '/' separated
* zonename prefix string. The zonename prefixed source datalink can
* be used by pcap consumers in the Solaris global zone to capture
* traffic on datalinks in non-global zones. Non-global zones
* do not have access to datalinks outside of their own namespace.
*/
if ((zonesep = strchr(p->opt.device, '/')) != NULL) {
char path_zname[ZONENAME_MAX];
int znamelen;
char *lnamep;
if (ifr.lifr_zoneid != GLOBAL_ZONEID) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"zonename/linkname only valid in global zone.");
status = PCAP_ERROR;
goto bad;
}
znamelen = zonesep - p->opt.device;
(void) pcap_strlcpy(path_zname, p->opt.device, znamelen + 1);
ifr.lifr_zoneid = getzoneidbyname(path_zname);
if (ifr.lifr_zoneid == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "getzoneidbyname(%s)", path_zname);
status = PCAP_ERROR;
goto bad;
}
lnamep = strdup(zonesep + 1);
if (lnamep == NULL) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "strdup");
status = PCAP_ERROR;
goto bad;
}
free(p->opt.device);
p->opt.device = lnamep;
}
#endif
pb->device = strdup(p->opt.device);
if (pb->device == NULL) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "strdup");
status = PCAP_ERROR;
goto bad;
}
/*
* Attempt to find out the version of the OS on which we're running.
*/
if (uname(&osinfo) == 0)
have_osinfo = 1;
#ifdef __APPLE__
/*
* See comment in pcap_can_set_rfmon_bpf() for an explanation
* of why we check the version number.
*/
if (p->opt.rfmon) {
if (have_osinfo) {
/*
* We assume osinfo.sysname is "Darwin", because
* __APPLE__ is defined. We just check the version.
*/
if (osinfo.release[0] < '8' &&
osinfo.release[1] == '.') {
/*
* 10.3 (Darwin 7.x) or earlier.
*/
status = PCAP_ERROR_RFMON_NOTSUP;
goto bad;
}
if (osinfo.release[0] == '8' &&
osinfo.release[1] == '.') {
/*
* 10.4 (Darwin 8.x). s/en/wlt/
*/
if (strncmp(p->opt.device, "en", 2) != 0) {
/*
* Not an enN device; check
* whether the device even exists.
*/
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd != -1) {
pcap_strlcpy(ifrname,
p->opt.device, ifnamsiz);
if (ioctl(sockfd, SIOCGIFFLAGS,
(char *)&ifr) < 0) {
/*
* We assume this
* failed because
* the underlying
* device doesn't
* exist.
*/
status = PCAP_ERROR_NO_SUCH_DEVICE;
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE,
errno,
"SIOCGIFFLAGS failed");
} else
status = PCAP_ERROR_RFMON_NOTSUP;
close(sockfd);
} else {
/*
* We can't find out whether
* the device exists, so just
* report "no such device".
*/
status = PCAP_ERROR_NO_SUCH_DEVICE;
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno,
"socket() failed");
}
goto bad;
}
wltdev = malloc(strlen(p->opt.device) + 2);
if (wltdev == NULL) {
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno,
"malloc");
status = PCAP_ERROR;
goto bad;
}
strcpy(wltdev, "wlt");
strcat(wltdev, p->opt.device + 2);
free(p->opt.device);
p->opt.device = wltdev;
}
/*
* Everything else is 10.5 or later; for those,
* we just open the enN device, and set the DLT.
*/
}
}
#endif /* __APPLE__ */
/*
* If this is FreeBSD, and the device name begins with "usbus",
* try to create the interface if it's not available.
*/
#if defined(__FreeBSD__) && defined(SIOCIFCREATE2)
if (strncmp(p->opt.device, usbus_prefix, USBUS_PREFIX_LEN) == 0) {
/*
* Do we already have an interface with that name?
*/
if (if_nametoindex(p->opt.device) == 0) {
/*
* No. We need to create it, and, if we
* succeed, remember that we should destroy
* it when the pcap_t is closed.
*/
int s;
/*
* Open a socket to use for ioctls to
* create the interface.
*/
s = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (s < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno,
"Can't open socket");
status = PCAP_ERROR;
goto bad;
}
/*
* If we haven't already done so, arrange to have
* "pcap_close_all()" called when we exit.
*/
if (!pcap_do_addexit(p)) {
/*
* "atexit()" failed; don't create the
* interface, just give up.
*/
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"atexit failed");
close(s);
status = PCAP_ERROR;
goto bad;
}
/*
* Create the interface.
*/
pcap_strlcpy(ifr.ifr_name, p->opt.device, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) {
if (errno == EINVAL) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Invalid USB bus interface %s",
p->opt.device);
} else {
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno,
"Can't create interface for %s",
p->opt.device);
}
close(s);
status = PCAP_ERROR;
goto bad;
}
/*
* Make sure we clean this up when we close.
*/
pb->must_do_on_close |= MUST_DESTROY_USBUS;
/*
* Add this to the list of pcaps to close when we exit.
*/
pcap_add_to_pcaps_to_close(p);
}
}
#endif /* defined(__FreeBSD__) && defined(SIOCIFCREATE2) */
#ifdef HAVE_ZEROCOPY_BPF
/*
* If the BPF extension to set buffer mode is present, try setting
* the mode to zero-copy. If that fails, use regular buffering. If
* it succeeds but other setup fails, return an error to the user.
*/
bufmode = BPF_BUFMODE_ZBUF;
if (ioctl(fd, BIOCSETBUFMODE, (caddr_t)&bufmode) == 0) {
/*
* We have zerocopy BPF; use it.
*/
pb->zerocopy = 1;
/*
* How to pick a buffer size: first, query the maximum buffer
* size supported by zero-copy. This also lets us quickly
* determine whether the kernel generally supports zero-copy.
* Then, if a buffer size was specified, use that, otherwise
* query the default buffer size, which reflects kernel
* policy for a desired default. Round to the nearest page
* size.
*/
if (ioctl(fd, BIOCGETZMAX, (caddr_t)&zbufmax) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCGETZMAX");
status = PCAP_ERROR;
goto bad;
}
if (p->opt.buffer_size != 0) {
/*
* A buffer size was explicitly specified; use it.
*/
v = p->opt.buffer_size;
} else {
if ((ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) ||
v < DEFAULT_BUFSIZE)
v = DEFAULT_BUFSIZE;
}
#ifndef roundup
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */
#endif
pb->zbufsize = roundup(v, getpagesize());
if (pb->zbufsize > zbufmax)
pb->zbufsize = zbufmax;
pb->zbuf1 = mmap(NULL, pb->zbufsize, PROT_READ | PROT_WRITE,
MAP_ANON, -1, 0);
pb->zbuf2 = mmap(NULL, pb->zbufsize, PROT_READ | PROT_WRITE,
MAP_ANON, -1, 0);
if (pb->zbuf1 == MAP_FAILED || pb->zbuf2 == MAP_FAILED) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "mmap");
status = PCAP_ERROR;
goto bad;
}
memset(&bz, 0, sizeof(bz)); /* bzero() deprecated, replaced with memset() */
bz.bz_bufa = pb->zbuf1;
bz.bz_bufb = pb->zbuf2;
bz.bz_buflen = pb->zbufsize;
if (ioctl(fd, BIOCSETZBUF, (caddr_t)&bz) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETZBUF");
status = PCAP_ERROR;
goto bad;
}
(void)strncpy(ifrname, p->opt.device, ifnamsiz);
if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETIF: %s", p->opt.device);
status = PCAP_ERROR;
goto bad;
}
v = pb->zbufsize - sizeof(struct bpf_zbuf_header);
} else
#endif
{
/*
* We don't have zerocopy BPF.
* Set the buffer size.
*/
if (p->opt.buffer_size != 0) {
/*
* A buffer size was explicitly specified; use it.
*/
if (ioctl(fd, BIOCSBLEN,
(caddr_t)&p->opt.buffer_size) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno,
"BIOCSBLEN: %s", p->opt.device);
status = PCAP_ERROR;
goto bad;
}
/*
* Now bind to the device.
*/
(void)strncpy(ifrname, p->opt.device, ifnamsiz);
#ifdef BIOCSETLIF
if (ioctl(fd, BIOCSETLIF, (caddr_t)&ifr) < 0)
#else
if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0)
#endif
{
status = check_setif_failure(p, errno);
goto bad;
}
} else {
/*
* No buffer size was explicitly specified.
*
* Try finding a good size for the buffer;
* DEFAULT_BUFSIZE may be too big, so keep
* cutting it in half until we find a size
* that works, or run out of sizes to try.
* If the default is larger, don't make it smaller.
*/
if ((ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) ||
v < DEFAULT_BUFSIZE)
v = DEFAULT_BUFSIZE;
for ( ; v != 0; v >>= 1) {
/*
* Ignore the return value - this is because the
* call fails on BPF systems that don't have
* kernel malloc. And if the call fails, it's
* no big deal, we just continue to use the
* standard buffer size.
*/
(void) ioctl(fd, BIOCSBLEN, (caddr_t)&v);
(void)strncpy(ifrname, p->opt.device, ifnamsiz);
#ifdef BIOCSETLIF
if (ioctl(fd, BIOCSETLIF, (caddr_t)&ifr) >= 0)
#else
if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) >= 0)
#endif
break; /* that size worked; we're done */
if (errno != ENOBUFS) {
status = check_setif_failure(p, errno);
goto bad;
}
}
if (v == 0) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"BIOCSBLEN: %s: No buffer size worked",
p->opt.device);
status = PCAP_ERROR;
goto bad;
}
}
}
/* Get the data link layer type. */
if (ioctl(fd, BIOCGDLT, (caddr_t)&v) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCGDLT");
status = PCAP_ERROR;
goto bad;
}
#ifdef _AIX
/*
* AIX's BPF returns IFF_ types, not DLT_ types, in BIOCGDLT.
*/
switch (v) {
case IFT_ETHER:
case IFT_ISO88023:
v = DLT_EN10MB;
break;
case IFT_FDDI:
v = DLT_FDDI;
break;
case IFT_ISO88025:
v = DLT_IEEE802;
break;
case IFT_LOOP:
v = DLT_NULL;
break;
default:
/*
* We don't know what to map this to yet.
*/
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "unknown interface type %u",
v);
status = PCAP_ERROR;
goto bad;
}
#endif
#if _BSDI_VERSION - 0 >= 199510
/* The SLIP and PPP link layer header changed in BSD/OS 2.1 */
switch (v) {
case DLT_SLIP:
v = DLT_SLIP_BSDOS;
break;
case DLT_PPP:
v = DLT_PPP_BSDOS;
break;
case 11: /*DLT_FR*/
v = DLT_FRELAY;
break;
case 12: /*DLT_C_HDLC*/
v = DLT_CHDLC;
break;
}
#endif
#ifdef BIOCGDLTLIST
/*
* We know the default link type -- now determine all the DLTs
* this interface supports. If this fails with EINVAL, it's
* not fatal; we just don't get to use the feature later.
*/
if (get_dlt_list(fd, v, &bdl, p->errbuf) == -1) {
status = PCAP_ERROR;
goto bad;
}
p->dlt_count = bdl.bfl_len;
p->dlt_list = bdl.bfl_list;
#ifdef __APPLE__
/*
* Monitor mode fun, continued.
*
* For 10.5 and, we're assuming, later releases, as noted above,
* 802.1 adapters that support monitor mode offer both DLT_EN10MB,
* DLT_IEEE802_11, and possibly some 802.11-plus-radio-information
* DLT_ value. Choosing one of the 802.11 DLT_ values will turn
* monitor mode on.
*
* Therefore, if the user asked for monitor mode, we filter out
* the DLT_EN10MB value, as you can't get that in monitor mode,
* and, if the user didn't ask for monitor mode, we filter out
* the 802.11 DLT_ values, because selecting those will turn
* monitor mode on. Then, for monitor mode, if an 802.11-plus-
* radio DLT_ value is offered, we try to select that, otherwise
* we try to select DLT_IEEE802_11.
*/
if (have_osinfo) {
if (isdigit((unsigned)osinfo.release[0]) &&
(osinfo.release[0] == '9' ||
isdigit((unsigned)osinfo.release[1]))) {
/*
* 10.5 (Darwin 9.x), or later.
*/
new_dlt = find_802_11(&bdl);
if (new_dlt != -1) {
/*
* We have at least one 802.11 DLT_ value,
* so this is an 802.11 interface.
* new_dlt is the best of the 802.11
* DLT_ values in the list.
*/
if (p->opt.rfmon) {
/*
* Our caller wants monitor mode.
* Purge DLT_EN10MB from the list
* of link-layer types, as selecting
* it will keep monitor mode off.
*/
remove_non_802_11(p);
/*
* If the new mode we want isn't
* the default mode, attempt to
* select the new mode.
*/
if ((u_int)new_dlt != v) {
if (ioctl(p->fd, BIOCSDLT,
&new_dlt) != -1) {
/*
* We succeeded;
* make this the
* new DLT_ value.
*/
v = new_dlt;
}
}
} else {
/*
* Our caller doesn't want
* monitor mode. Unless this
* is being done by pcap_open_live(),
* purge the 802.11 link-layer types
* from the list, as selecting
* one of them will turn monitor
* mode on.
*/
if (!p->oldstyle)
remove_802_11(p);
}
} else {
if (p->opt.rfmon) {
/*
* The caller requested monitor
* mode, but we have no 802.11
* link-layer types, so they
* can't have it.
*/
status = PCAP_ERROR_RFMON_NOTSUP;
goto bad;
}
}
}
}
#elif defined(HAVE_BSD_IEEE80211)
/*
* *BSD with the new 802.11 ioctls.
* Do we want monitor mode?
*/
if (p->opt.rfmon) {
/*
* Try to put the interface into monitor mode.
*/
retv = monitor_mode(p, 1);
if (retv != 0) {
/*
* We failed.
*/
status = retv;
goto bad;
}
/*
* We're in monitor mode.
* Try to find the best 802.11 DLT_ value and, if we
* succeed, try to switch to that mode if we're not
* already in that mode.
*/
new_dlt = find_802_11(&bdl);
if (new_dlt != -1) {
/*
* We have at least one 802.11 DLT_ value.
* new_dlt is the best of the 802.11
* DLT_ values in the list.
*
* If the new mode we want isn't the default mode,
* attempt to select the new mode.
*/
if ((u_int)new_dlt != v) {
if (ioctl(p->fd, BIOCSDLT, &new_dlt) != -1) {
/*
* We succeeded; make this the
* new DLT_ value.
*/
v = new_dlt;
}
}
}
}
#endif /* various platforms */
#endif /* BIOCGDLTLIST */
/*
* If this is an Ethernet device, and we don't have a DLT_ list,
* give it a list with DLT_EN10MB and DLT_DOCSIS. (That'd give
* 802.11 interfaces DLT_DOCSIS, which isn't the right thing to
* do, but there's not much we can do about that without finding
* some other way of determining whether it's an Ethernet or 802.11
* device.)
*/
if (v == DLT_EN10MB && p->dlt_count == 0) {
p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
/*
* If that fails, just leave the list empty.
*/
if (p->dlt_list != NULL) {
p->dlt_list[0] = DLT_EN10MB;
p->dlt_list[1] = DLT_DOCSIS;
p->dlt_count = 2;
}
}
#ifdef PCAP_FDDIPAD
if (v == DLT_FDDI)
p->fddipad = PCAP_FDDIPAD;
else
#endif
p->fddipad = 0;
p->linktype = v;
#if defined(BIOCGHDRCMPLT) && defined(BIOCSHDRCMPLT)
/*
* Do a BIOCSHDRCMPLT, if defined, to turn that flag on, so
* the link-layer source address isn't forcibly overwritten.
* (Should we ignore errors? Should we do this only if
* we're open for writing?)
*
* XXX - I seem to remember some packet-sending bug in some
* BSDs - check CVS log for "bpf.c"?
*/
if (ioctl(fd, BIOCSHDRCMPLT, &spoof_eth_src) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSHDRCMPLT");
status = PCAP_ERROR;
goto bad;
}
#endif
/* set timeout */
#ifdef HAVE_ZEROCOPY_BPF
/*
* In zero-copy mode, we just use the timeout in select().
* XXX - what if we're in non-blocking mode and the *application*
* is using select() or poll() or kqueues or....?
*/
if (p->opt.timeout && !pb->zerocopy) {
#else
if (p->opt.timeout) {
#endif
/*
* XXX - is this seconds/nanoseconds in AIX?
* (Treating it as such doesn't fix the timeout
* problem described below.)
*
* XXX - Mac OS X 10.6 mishandles BIOCSRTIMEOUT in
* 64-bit userland - it takes, as an argument, a
* "struct BPF_TIMEVAL", which has 32-bit tv_sec
* and tv_usec, rather than a "struct timeval".
*
* If this platform defines "struct BPF_TIMEVAL",
* we check whether the structure size in BIOCSRTIMEOUT
* is that of a "struct timeval" and, if not, we use
* a "struct BPF_TIMEVAL" rather than a "struct timeval".
* (That way, if the bug is fixed in a future release,
* we will still do the right thing.)
*/
struct timeval to;
#ifdef HAVE_STRUCT_BPF_TIMEVAL
struct BPF_TIMEVAL bpf_to;
if (IOCPARM_LEN(BIOCSRTIMEOUT) != sizeof(struct timeval)) {
bpf_to.tv_sec = p->opt.timeout / 1000;
bpf_to.tv_usec = (p->opt.timeout * 1000) % 1000000;
if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&bpf_to) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf,
errno, PCAP_ERRBUF_SIZE, "BIOCSRTIMEOUT");
status = PCAP_ERROR;
goto bad;
}
} else {
#endif
to.tv_sec = p->opt.timeout / 1000;
to.tv_usec = (p->opt.timeout * 1000) % 1000000;
if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&to) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf,
errno, PCAP_ERRBUF_SIZE, "BIOCSRTIMEOUT");
status = PCAP_ERROR;
goto bad;
}
#ifdef HAVE_STRUCT_BPF_TIMEVAL
}
#endif
}
#ifdef BIOCIMMEDIATE
/*
* Darren Reed notes that
*
* On AIX (4.2 at least), if BIOCIMMEDIATE is not set, the
* timeout appears to be ignored and it waits until the buffer
* is filled before returning. The result of not having it
* set is almost worse than useless if your BPF filter
* is reducing things to only a few packets (i.e. one every
* second or so).
*
* so we always turn BIOCIMMEDIATE mode on if this is AIX.
*
* For other platforms, we don't turn immediate mode on by default,
* as that would mean we get woken up for every packet, which
* probably isn't what you want for a packet sniffer.
*
* We set immediate mode if the caller requested it by calling
* pcap_set_immediate() before calling pcap_activate().
*/
#ifndef _AIX
if (p->opt.immediate) {
#endif /* _AIX */
v = 1;
if (ioctl(p->fd, BIOCIMMEDIATE, &v) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCIMMEDIATE");
status = PCAP_ERROR;
goto bad;
}
#ifndef _AIX
}
#endif /* _AIX */
#else /* BIOCIMMEDIATE */
if (p->opt.immediate) {
/*
* We don't support immediate mode. Fail.
*/
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Immediate mode not supported");
status = PCAP_ERROR;
goto bad;
}
#endif /* BIOCIMMEDIATE */
if (p->opt.promisc) {
/* set promiscuous mode, just warn if it fails */
if (ioctl(p->fd, BIOCPROMISC, NULL) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCPROMISC");
status = PCAP_WARNING_PROMISC_NOTSUP;
}
}
#ifdef BIOCSTSTAMP
v = BPF_T_BINTIME;
if (ioctl(p->fd, BIOCSTSTAMP, &v) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSTSTAMP");
status = PCAP_ERROR;
goto bad;
}
#endif /* BIOCSTSTAMP */
if (ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCGBLEN");
status = PCAP_ERROR;
goto bad;
}
p->bufsize = v;
#ifdef HAVE_ZEROCOPY_BPF
if (!pb->zerocopy) {
#endif
p->buffer = malloc(p->bufsize);
if (p->buffer == NULL) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "malloc");
status = PCAP_ERROR;
goto bad;
}
#ifdef _AIX
/* For some strange reason this seems to prevent the EFAULT
* problems we have experienced from AIX BPF. */
memset(p->buffer, 0x0, p->bufsize);
#endif
#ifdef HAVE_ZEROCOPY_BPF
}
#endif
/*
* If there's no filter program installed, there's
* no indication to the kernel of what the snapshot
* length should be, so no snapshotting is done.
*
* Therefore, when we open the device, we install
* an "accept everything" filter with the specified
* snapshot length.
*/
total_insn.code = (u_short)(BPF_RET | BPF_K);
total_insn.jt = 0;
total_insn.jf = 0;
total_insn.k = p->snapshot;
total_prog.bf_len = 1;
total_prog.bf_insns = &total_insn;
if (ioctl(p->fd, BIOCSETF, (caddr_t)&total_prog) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETF");
status = PCAP_ERROR;
goto bad;
}
/*
* On most BPF platforms, either you can do a "select()" or
* "poll()" on a BPF file descriptor and it works correctly,
* or you can do it and it will return "readable" if the
* hold buffer is full but not if the timeout expires *and*
* a non-blocking read will, if the hold buffer is empty
* but the store buffer isn't empty, rotate the buffers
* and return what packets are available.
*
* In the latter case, the fact that a non-blocking read
* will give you the available packets means you can work
* around the failure of "select()" and "poll()" to wake up
* and return "readable" when the timeout expires by using
* the timeout as the "select()" or "poll()" timeout, putting
* the BPF descriptor into non-blocking mode, and read from
* it regardless of whether "select()" reports it as readable
* or not.
*
* However, in FreeBSD 4.3 and 4.4, "select()" and "poll()"
* won't wake up and return "readable" if the timer expires
* and non-blocking reads return EWOULDBLOCK if the hold
* buffer is empty, even if the store buffer is non-empty.
*
* This means the workaround in question won't work.
*
* Therefore, on FreeBSD 4.3 and 4.4, we set "p->selectable_fd"
* to -1, which means "sorry, you can't use 'select()' or 'poll()'
* here". On all other BPF platforms, we set it to the FD for
* the BPF device; in NetBSD, OpenBSD, and Darwin, a non-blocking
* read will, if the hold buffer is empty and the store buffer
* isn't empty, rotate the buffers and return what packets are
* there (and in sufficiently recent versions of OpenBSD
* "select()" and "poll()" should work correctly).
*
* XXX - what about AIX?
*/
p->selectable_fd = p->fd; /* assume select() works until we know otherwise */
if (have_osinfo) {
/*
* We can check what OS this is.
*/
if (strcmp(osinfo.sysname, "FreeBSD") == 0) {
if (strncmp(osinfo.release, "4.3-", 4) == 0 ||
strncmp(osinfo.release, "4.4-", 4) == 0)
p->selectable_fd = -1;
}
}
p->read_op = pcap_read_bpf;
p->inject_op = pcap_inject_bpf;
p->setfilter_op = pcap_setfilter_bpf;
p->setdirection_op = pcap_setdirection_bpf;
p->set_datalink_op = pcap_set_datalink_bpf;
p->getnonblock_op = pcap_getnonblock_bpf;
p->setnonblock_op = pcap_setnonblock_bpf;
p->stats_op = pcap_stats_bpf;
p->cleanup_op = pcap_cleanup_bpf;
return (status);
bad:
pcap_cleanup_bpf(p);
return (status);
}
/*
* Not all interfaces can be bound to by BPF, so try to bind to
* the specified interface; return 0 if we fail with
* PCAP_ERROR_NO_SUCH_DEVICE (which means we got an ENXIO when we tried
* to bind, which means this interface isn't in the list of interfaces
* attached to BPF) and 1 otherwise.
*/
static int
check_bpf_bindable(const char *name)
{
int fd;
char errbuf[PCAP_ERRBUF_SIZE];
/*
* On macOS, we don't do this check if the device name begins
* with "wlt"; at least some versions of macOS (actually, it
* was called "Mac OS X" then...) offer monitor mode capturing
* by having a separate "monitor mode" device for each wireless
* adapter, rather than by implementing the ioctls that
* {Free,Net,Open,DragonFly}BSD provide. Opening that device
* puts the adapter into monitor mode, which, at least for
* some adapters, causes them to deassociate from the network
* with which they're associated.
*
* Instead, we try to open the corresponding "en" device (so
* that we don't end up with, for users without sufficient
* privilege to open capture devices, a list of adapters that
* only includes the wlt devices).
*/
#ifdef __APPLE__
if (strncmp(name, "wlt", 3) == 0) {
char *en_name;
size_t en_name_len;
/*
* Try to allocate a buffer for the "en"
* device's name.
*/
en_name_len = strlen(name) - 1;
en_name = malloc(en_name_len + 1);
if (en_name == NULL) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "malloc");
return (-1);
}
strcpy(en_name, "en");
strcat(en_name, name + 3);
fd = bpf_open_and_bind(en_name, errbuf);
free(en_name);
} else
#endif /* __APPLE */
fd = bpf_open_and_bind(name, errbuf);
if (fd < 0) {
/*
* Error - was it PCAP_ERROR_NO_SUCH_DEVICE?
*/
if (fd == PCAP_ERROR_NO_SUCH_DEVICE) {
/*
* Yes, so we can't bind to this because it's
* not something supported by BPF.
*/
return (0);
}
/*
* No, so we don't know whether it's supported or not;
* say it is, so that the user can at least try to
* open it and report the error (which is probably
* "you don't have permission to open BPF devices";
* reporting those interfaces means users will ask
* "why am I getting a permissions error when I try
* to capture" rather than "why am I not seeing any
* interfaces", making the underlying problem clearer).
*/
return (1);
}
/*
* Success.
*/
close(fd);
return (1);
}
#if defined(__FreeBSD__) && defined(SIOCIFCREATE2)
static int
get_usb_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
{
/*
* XXX - if there's a way to determine whether there's something
* plugged into a given USB bus, use that to determine whether
* this device is "connected" or not.
*/
return (0);
}
static int
finddevs_usb(pcap_if_list_t *devlistp, char *errbuf)
{
DIR *usbdir;
struct dirent *usbitem;
size_t name_max;
char *name;
/*
* We might have USB sniffing support, so try looking for USB
* interfaces.
*
* We want to report a usbusN device for each USB bus, but
* usbusN interfaces might, or might not, exist for them -
* we create one if there isn't already one.
*
* So, instead, we look in /dev/usb for all buses and create
* a "usbusN" device for each one.
*/
usbdir = opendir("/dev/usb");
if (usbdir == NULL) {
/*
* Just punt.
*/
return (0);
}
/*
* Leave enough room for a 32-bit (10-digit) bus number.
* Yes, that's overkill, but we won't be using
* the buffer very long.
*/
name_max = USBUS_PREFIX_LEN + 10 + 1;
name = malloc(name_max);
if (name == NULL) {
closedir(usbdir);
return (0);
}
while ((usbitem = readdir(usbdir)) != NULL) {
char *p;
size_t busnumlen;
if (strcmp(usbitem->d_name, ".") == 0 ||
strcmp(usbitem->d_name, "..") == 0) {
/*
* Ignore these.
*/
continue;
}
p = strchr(usbitem->d_name, '.');
if (p == NULL)
continue;
busnumlen = p - usbitem->d_name;
memcpy(name, usbus_prefix, USBUS_PREFIX_LEN);
memcpy(name + USBUS_PREFIX_LEN, usbitem->d_name, busnumlen);
*(name + USBUS_PREFIX_LEN + busnumlen) = '\0';
/*
* There's an entry in this directory for every USB device,
* not for every bus; if there's more than one device on
* the bus, there'll be more than one entry for that bus,
* so we need to avoid adding multiple capture devices
* for each bus.
*/
if (find_or_add_dev(devlistp, name, PCAP_IF_UP,
get_usb_if_flags, NULL, errbuf) == NULL) {
free(name);
closedir(usbdir);
return (PCAP_ERROR);
}
}
free(name);
closedir(usbdir);
return (0);
}
#endif
/*
* Get additional flags for a device, using SIOCGIFMEDIA.
*/
#ifdef SIOCGIFMEDIA
static int
get_if_flags(const char *name, bpf_u_int32 *flags, char *errbuf)
{
int sock;
struct ifmediareq req;
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == -1) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno,
"Can't create socket to get media information for %s",
name);
return (-1);
}
memset(&req, 0, sizeof(req));
strncpy(req.ifm_name, name, sizeof(req.ifm_name));
if (ioctl(sock, SIOCGIFMEDIA, &req) < 0) {
if (errno == EOPNOTSUPP || errno == EINVAL || errno == ENOTTY ||
errno == ENODEV || errno == EPERM) {
/*
* Not supported, so we can't provide any
* additional information. Assume that
* this means that "connected" vs.
* "disconnected" doesn't apply.
*
* The ioctl routine for Apple's pktap devices,
* annoyingly, checks for "are you root?" before
* checking whether the ioctl is valid, so it
* returns EPERM, rather than ENOTSUP, for the
* invalid SIOCGIFMEDIA, unless you're root.
* So, just as we do for some ethtool ioctls
* on Linux, which makes the same mistake, we
* also treat EPERM as meaning "not supported".
*/
*flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
close(sock);
return (0);
}
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno,
"SIOCGIFMEDIA on %s failed", name);
close(sock);
return (-1);
}
close(sock);
/*
* OK, what type of network is this?
*/
switch (IFM_TYPE(req.ifm_active)) {
case IFM_IEEE80211:
/*
* Wireless.
*/
*flags |= PCAP_IF_WIRELESS;
break;
}
/*
* Do we know whether it's connected?
*/
if (req.ifm_status & IFM_AVALID) {
/*
* Yes.
*/
if (req.ifm_status & IFM_ACTIVE) {
/*
* It's connected.
*/
*flags |= PCAP_IF_CONNECTION_STATUS_CONNECTED;
} else {
/*
* It's disconnected.
*/
*flags |= PCAP_IF_CONNECTION_STATUS_DISCONNECTED;
}
}
return (0);
}
#else
static int
get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
{
/*
* Nothing we can do other than mark loopback devices as "the
* connected/disconnected status doesn't apply".
*
* XXX - on Solaris, can we do what the dladm command does,
* i.e. get a connected/disconnected indication from a kstat?
* (Note that you can also get the link speed, and possibly
* other information, from a kstat as well.)
*/
if (*flags & PCAP_IF_LOOPBACK) {
/*
* Loopback devices aren't wireless, and "connected"/
* "disconnected" doesn't apply to them.
*/
*flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
return (0);
}
return (0);
}
#endif
int
pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
{
/*
* Get the list of regular interfaces first.
*/
if (pcap_findalldevs_interfaces(devlistp, errbuf, check_bpf_bindable,
get_if_flags) == -1)
return (-1); /* failure */
#if defined(__FreeBSD__) && defined(SIOCIFCREATE2)
if (finddevs_usb(devlistp, errbuf) == -1)
return (-1);
#endif
return (0);
}
#ifdef HAVE_BSD_IEEE80211
static int
monitor_mode(pcap_t *p, int set)
{
struct pcap_bpf *pb = p->priv;
int sock;
struct ifmediareq req;
IFM_ULIST_TYPE *media_list;
int i;
int can_do;
struct ifreq ifr;
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "can't open socket");
return (PCAP_ERROR);
}
memset(&req, 0, sizeof req);
strncpy(req.ifm_name, p->opt.device, sizeof req.ifm_name);
/*
* Find out how many media types we have.
*/
if (ioctl(sock, SIOCGIFMEDIA, &req) < 0) {
/*
* Can't get the media types.
*/
switch (errno) {
case ENXIO:
/*
* There's no such device.
*/
close(sock);
return (PCAP_ERROR_NO_SUCH_DEVICE);
case EINVAL:
/*
* Interface doesn't support SIOC{G,S}IFMEDIA.
*/
close(sock);
return (PCAP_ERROR_RFMON_NOTSUP);
default:
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "SIOCGIFMEDIA");
close(sock);
return (PCAP_ERROR);
}
}
if (req.ifm_count == 0) {
/*
* No media types.
*/
close(sock);
return (PCAP_ERROR_RFMON_NOTSUP);
}
/*
* Allocate a buffer to hold all the media types, and
* get the media types.
*/
media_list = malloc(req.ifm_count * sizeof(*media_list));
if (media_list == NULL) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "malloc");
close(sock);
return (PCAP_ERROR);
}
req.ifm_ulist = media_list;
if (ioctl(sock, SIOCGIFMEDIA, &req) < 0) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "SIOCGIFMEDIA");
free(media_list);
close(sock);
return (PCAP_ERROR);
}
/*
* Look for an 802.11 "automatic" media type.
* We assume that all 802.11 adapters have that media type,
* and that it will carry the monitor mode supported flag.
*/
can_do = 0;
for (i = 0; i < req.ifm_count; i++) {
if (IFM_TYPE(media_list[i]) == IFM_IEEE80211
&& IFM_SUBTYPE(media_list[i]) == IFM_AUTO) {
/* OK, does it do monitor mode? */
if (media_list[i] & IFM_IEEE80211_MONITOR) {
can_do = 1;
break;
}
}
}
free(media_list);
if (!can_do) {
/*
* This adapter doesn't support monitor mode.
*/
close(sock);
return (PCAP_ERROR_RFMON_NOTSUP);
}
if (set) {
/*
* Don't just check whether we can enable monitor mode,
* do so, if it's not already enabled.
*/
if ((req.ifm_current & IFM_IEEE80211_MONITOR) == 0) {
/*
* Monitor mode isn't currently on, so turn it on,
* and remember that we should turn it off when the
* pcap_t is closed.
*/
/*
* If we haven't already done so, arrange to have
* "pcap_close_all()" called when we exit.
*/
if (!pcap_do_addexit(p)) {
/*
* "atexit()" failed; don't put the interface
* in monitor mode, just give up.
*/
close(sock);
return (PCAP_ERROR);
}
memset(&ifr, 0, sizeof(ifr));
(void)strncpy(ifr.ifr_name, p->opt.device,
sizeof(ifr.ifr_name));
ifr.ifr_media = req.ifm_current | IFM_IEEE80211_MONITOR;
if (ioctl(sock, SIOCSIFMEDIA, &ifr) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf,
PCAP_ERRBUF_SIZE, errno, "SIOCSIFMEDIA");
close(sock);
return (PCAP_ERROR);
}
pb->must_do_on_close |= MUST_CLEAR_RFMON;
/*
* Add this to the list of pcaps to close when we exit.
*/
pcap_add_to_pcaps_to_close(p);
}
}
return (0);
}
#endif /* HAVE_BSD_IEEE80211 */
#if defined(BIOCGDLTLIST) && (defined(__APPLE__) || defined(HAVE_BSD_IEEE80211))
/*
* Check whether we have any 802.11 link-layer types; return the best
* of the 802.11 link-layer types if we find one, and return -1
* otherwise.
*
* DLT_IEEE802_11_RADIO, with the radiotap header, is considered the
* best 802.11 link-layer type; any of the other 802.11-plus-radio
* headers are second-best; 802.11 with no radio information is
* the least good.
*/
static int
find_802_11(struct bpf_dltlist *bdlp)
{
int new_dlt;
u_int i;
/*
* Scan the list of DLT_ values, looking for 802.11 values,
* and, if we find any, choose the best of them.
*/
new_dlt = -1;
for (i = 0; i < bdlp->bfl_len; i++) {
switch (bdlp->bfl_list[i]) {
case DLT_IEEE802_11:
/*
* 802.11, but no radio.
*
* Offer this, and select it as the new mode
* unless we've already found an 802.11
* header with radio information.
*/
if (new_dlt == -1)
new_dlt = bdlp->bfl_list[i];
break;
#ifdef DLT_PRISM_HEADER
case DLT_PRISM_HEADER:
#endif
#ifdef DLT_AIRONET_HEADER
case DLT_AIRONET_HEADER:
#endif
case DLT_IEEE802_11_RADIO_AVS:
/*
* 802.11 with radio, but not radiotap.
*
* Offer this, and select it as the new mode
* unless we've already found the radiotap DLT_.
*/
if (new_dlt != DLT_IEEE802_11_RADIO)
new_dlt = bdlp->bfl_list[i];
break;
case DLT_IEEE802_11_RADIO:
/*
* 802.11 with radiotap.
*
* Offer this, and select it as the new mode.
*/
new_dlt = bdlp->bfl_list[i];
break;
default:
/*
* Not 802.11.
*/
break;
}
}
return (new_dlt);
}
#endif /* defined(BIOCGDLTLIST) && (defined(__APPLE__) || defined(HAVE_BSD_IEEE80211)) */
#if defined(__APPLE__) && defined(BIOCGDLTLIST)
/*
* Remove non-802.11 header types from the list of DLT_ values, as we're in
* monitor mode, and those header types aren't supported in monitor mode.
*/
static void
remove_non_802_11(pcap_t *p)
{
int i, j;
/*
* Scan the list of DLT_ values and discard non-802.11 ones.
*/
j = 0;
for (i = 0; i < p->dlt_count; i++) {
switch (p->dlt_list[i]) {
case DLT_EN10MB:
case DLT_RAW:
/*
* Not 802.11. Don't offer this one.
*/
continue;
default:
/*
* Just copy this mode over.
*/
break;
}
/*
* Copy this DLT_ value to its new position.
*/
p->dlt_list[j] = p->dlt_list[i];
j++;
}
/*
* Set the DLT_ count to the number of entries we copied.
*/
p->dlt_count = j;
}
/*
* Remove 802.11 link-layer types from the list of DLT_ values, as
* we're not in monitor mode, and those DLT_ values will switch us
* to monitor mode.
*/
static void
remove_802_11(pcap_t *p)
{
int i, j;
/*
* Scan the list of DLT_ values and discard 802.11 values.
*/
j = 0;
for (i = 0; i < p->dlt_count; i++) {
switch (p->dlt_list[i]) {
case DLT_IEEE802_11:
#ifdef DLT_PRISM_HEADER
case DLT_PRISM_HEADER:
#endif
#ifdef DLT_AIRONET_HEADER
case DLT_AIRONET_HEADER:
#endif
case DLT_IEEE802_11_RADIO:
case DLT_IEEE802_11_RADIO_AVS:
#ifdef DLT_PPI
case DLT_PPI:
#endif
/*
* 802.11. Don't offer this one.
*/
continue;
default:
/*
* Just copy this mode over.
*/
break;
}
/*
* Copy this DLT_ value to its new position.
*/
p->dlt_list[j] = p->dlt_list[i];
j++;
}
/*
* Set the DLT_ count to the number of entries we copied.
*/
p->dlt_count = j;
}
#endif /* defined(__APPLE__) && defined(BIOCGDLTLIST) */
static int
pcap_setfilter_bpf(pcap_t *p, struct bpf_program *fp)
{
struct pcap_bpf *pb = p->priv;
/*
* Free any user-mode filter we might happen to have installed.
*/
pcap_freecode(&p->fcode);
/*
* Try to install the kernel filter.
*/
if (ioctl(p->fd, BIOCSETF, (caddr_t)fp) == 0) {
/*
* It worked.
*/
pb->filtering_in_kernel = 1; /* filtering in the kernel */
/*
* Discard any previously-received packets, as they might
* have passed whatever filter was formerly in effect, but
* might not pass this filter (BIOCSETF discards packets
* buffered in the kernel, so you can lose packets in any
* case).
*/
p->cc = 0;
return (0);
}
/*
* We failed.
*
* If it failed with EINVAL, that's probably because the program
* is invalid or too big. Validate it ourselves; if we like it
* (we currently allow backward branches, to support protochain),
* run it in userland. (There's no notion of "too big" for
* userland.)
*
* Otherwise, just give up.
* XXX - if the copy of the program into the kernel failed,
* we will get EINVAL rather than, say, EFAULT on at least
* some kernels.
*/
if (errno != EINVAL) {
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "BIOCSETF");
return (-1);
}
/*
* install_bpf_program() validates the program.
*
* XXX - what if we already have a filter in the kernel?
*/
if (install_bpf_program(p, fp) < 0)
return (-1);
pb->filtering_in_kernel = 0; /* filtering in userland */
return (0);
}
/*
* Set direction flag: Which packets do we accept on a forwarding
* single device? IN, OUT or both?
*/
#if defined(BIOCSDIRECTION)
static int
pcap_setdirection_bpf(pcap_t *p, pcap_direction_t d)
{
u_int direction;
direction = (d == PCAP_D_IN) ? BPF_D_IN :
((d == PCAP_D_OUT) ? BPF_D_OUT : BPF_D_INOUT);
if (ioctl(p->fd, BIOCSDIRECTION, &direction) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
errno, "Cannot set direction to %s",
(d == PCAP_D_IN) ? "PCAP_D_IN" :
((d == PCAP_D_OUT) ? "PCAP_D_OUT" : "PCAP_D_INOUT"));
return (-1);
}
return (0);
}
#elif defined(BIOCSSEESENT)
static int
pcap_setdirection_bpf(pcap_t *p, pcap_direction_t d)
{
u_int seesent;
/*
* We don't support PCAP_D_OUT.
*/
if (d == PCAP_D_OUT) {
pcap_snprintf(p->errbuf, sizeof(p->errbuf),
"Setting direction to PCAP_D_OUT is not supported on BPF");
return -1;
}
seesent = (d == PCAP_D_INOUT);
if (ioctl(p->fd, BIOCSSEESENT, &seesent) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
errno, "Cannot set direction to %s",
(d == PCAP_D_INOUT) ? "PCAP_D_INOUT" : "PCAP_D_IN");
return (-1);
}
return (0);
}
#else
static int
pcap_setdirection_bpf(pcap_t *p, pcap_direction_t d _U_)
{
(void) pcap_snprintf(p->errbuf, sizeof(p->errbuf),
"This system doesn't support BIOCSSEESENT, so the direction can't be set");
return (-1);
}
#endif
#ifdef BIOCSDLT
static int
pcap_set_datalink_bpf(pcap_t *p, int dlt)
{
if (ioctl(p->fd, BIOCSDLT, &dlt) == -1) {
pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
errno, "Cannot set DLT %d", dlt);
return (-1);
}
return (0);
}
#else
static int
pcap_set_datalink_bpf(pcap_t *p _U_, int dlt _U_)
{
return (0);
}
#endif
/*
* Platform-specific information.
*/
const char *
pcap_lib_version(void)
{
#ifdef HAVE_ZEROCOPY_BPF
return (PCAP_VERSION_STRING " (with zerocopy support)");
#else
return (PCAP_VERSION_STRING);
#endif
}
|
397349.c | /*
ChibiOS/RT - Copyright (C) 2006-2014 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "ch.h"
#include "hal.h"
#define MMA8451_ADDR 0x1D
#define WHO_AM_I 0x0D
static bool i2cOk = false;
static THD_WORKING_AREA(waThread1, 64);
static THD_FUNCTION(Thread1, arg) {
(void)arg;
chRegSetThreadName("Blinker");
while (TRUE) {
if (i2cOk) {
palSetPad(IOPORT3, 3);
palTogglePad(IOPORT4, 4);
} else {
palSetPad(IOPORT4, 4);
palTogglePad(IOPORT3, 3);
}
chThdSleepMilliseconds(500);
}
return 0;
}
/*
* Application entry point.
*/
int main(void) {
uint8_t tx[1], rx[1];
/*
* System initializations.
* - HAL initialization, this also initializes the configured device drivers
* and performs the board-specific initializations.
* - Kernel initialization, the main() function becomes a thread and the
* RTOS is active.
*/
halInit();
chSysInit();
palSetPad(IOPORT3, 3);
palSetPad(IOPORT4, 4);
palSetPad(IOPORT1, 2);
i2cStart(&I2CD1, NULL);
chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
while (1) {
tx[0] = WHO_AM_I;
i2cMasterTransmitTimeout(&I2CD1, MMA8451_ADDR, tx, 1, rx, 1, TIME_INFINITE);
i2cOk = (rx[0] == 0x1A) ? true : false;
chThdSleepMilliseconds(2000);
}
}
|
498442.c | /*
* linux/kernel/sys.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/utsname.h>
#include <linux/mman.h>
#include <linux/reboot.h>
#include <linux/prctl.h>
#include <linux/highuid.h>
#include <linux/fs.h>
#include <linux/kmod.h>
#include <linux/perf_event.h>
#include <linux/resource.h>
#include <linux/kernel.h>
#include <linux/workqueue.h>
#include <linux/capability.h>
#include <linux/device.h>
#include <linux/key.h>
#include <linux/times.h>
#include <linux/posix-timers.h>
#include <linux/security.h>
#include <linux/dcookies.h>
#include <linux/suspend.h>
#include <linux/tty.h>
#include <linux/signal.h>
#include <linux/cn_proc.h>
#include <linux/getcpu.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/seccomp.h>
#include <linux/cpu.h>
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/fs_struct.h>
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/gfp.h>
#include <linux/syscore_ops.h>
#include <linux/version.h>
#include <linux/ctype.h>
#include <linux/compat.h>
#include <linux/syscalls.h>
#include <linux/kprobes.h>
#include <linux/user_namespace.h>
#include <linux/binfmts.h>
#include <linux/sched.h>
#include <linux/rcupdate.h>
#include <linux/uidgid.h>
#include <linux/cred.h>
#include <linux/kmsg_dump.h>
/* Move somewhere else to avoid recompiling? */
#include <generated/utsrelease.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/unistd.h>
#ifndef SET_UNALIGN_CTL
# define SET_UNALIGN_CTL(a, b) (-EINVAL)
#endif
#ifndef GET_UNALIGN_CTL
# define GET_UNALIGN_CTL(a, b) (-EINVAL)
#endif
#ifndef SET_FPEMU_CTL
# define SET_FPEMU_CTL(a, b) (-EINVAL)
#endif
#ifndef GET_FPEMU_CTL
# define GET_FPEMU_CTL(a, b) (-EINVAL)
#endif
#ifndef SET_FPEXC_CTL
# define SET_FPEXC_CTL(a, b) (-EINVAL)
#endif
#ifndef GET_FPEXC_CTL
# define GET_FPEXC_CTL(a, b) (-EINVAL)
#endif
#ifndef GET_ENDIAN
# define GET_ENDIAN(a, b) (-EINVAL)
#endif
#ifndef SET_ENDIAN
# define SET_ENDIAN(a, b) (-EINVAL)
#endif
#ifndef GET_TSC_CTL
# define GET_TSC_CTL(a) (-EINVAL)
#endif
#ifndef SET_TSC_CTL
# define SET_TSC_CTL(a) (-EINVAL)
#endif
#ifndef MPX_ENABLE_MANAGEMENT
# define MPX_ENABLE_MANAGEMENT() (-EINVAL)
#endif
#ifndef MPX_DISABLE_MANAGEMENT
# define MPX_DISABLE_MANAGEMENT() (-EINVAL)
#endif
#ifndef GET_FP_MODE
# define GET_FP_MODE(a) (-EINVAL)
#endif
#ifndef SET_FP_MODE
# define SET_FP_MODE(a,b) (-EINVAL)
#endif
/*
* this is where the system-wide overflow UID and GID are defined, for
* architectures that now have 32-bit UID/GID but didn't in the past
*/
int overflowuid = DEFAULT_OVERFLOWUID;
int overflowgid = DEFAULT_OVERFLOWGID;
EXPORT_SYMBOL(overflowuid);
EXPORT_SYMBOL(overflowgid);
/*
* the same as above, but for filesystems which can only store a 16-bit
* UID and GID. as such, this is needed on all architectures
*/
int fs_overflowuid = DEFAULT_FS_OVERFLOWUID;
int fs_overflowgid = DEFAULT_FS_OVERFLOWUID;
EXPORT_SYMBOL(fs_overflowuid);
EXPORT_SYMBOL(fs_overflowgid);
/*
* Returns true if current's euid is same as p's uid or euid,
* or has CAP_SYS_NICE to p's user_ns.
*
* Called with rcu_read_lock, creds are safe
*/
static bool set_one_prio_perm(struct task_struct *p)
{
const struct cred *cred = current_cred(), *pcred = __task_cred(p);
if (uid_eq(pcred->uid, cred->euid) ||
uid_eq(pcred->euid, cred->euid))
return true;
if (ns_capable(pcred->user_ns, CAP_SYS_NICE))
return true;
return false;
}
/*
* set the priority of a task
* - the caller must hold the RCU read lock
*/
static int set_one_prio(struct task_struct *p, int niceval, int error)
{
int no_nice;
if (!set_one_prio_perm(p)) {
error = -EPERM;
goto out;
}
if (niceval < task_nice(p) && !can_nice(p, niceval)) {
error = -EACCES;
goto out;
}
no_nice = security_task_setnice(p, niceval);
if (no_nice) {
error = no_nice;
goto out;
}
if (error == -ESRCH)
error = 0;
set_user_nice(p, niceval);
out:
return error;
}
SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
{
struct task_struct *g, *p;
struct user_struct *user;
const struct cred *cred = current_cred();
int error = -EINVAL;
struct pid *pgrp;
kuid_t uid;
if (which > PRIO_USER || which < PRIO_PROCESS)
goto out;
/* normalize: avoid signed division (rounding problems) */
error = -ESRCH;
if (niceval < MIN_NICE)
niceval = MIN_NICE;
if (niceval > MAX_NICE)
niceval = MAX_NICE;
rcu_read_lock();
read_lock(&tasklist_lock);
switch (which) {
case PRIO_PROCESS:
if (who)
p = find_task_by_vpid(who);
else
p = current;
if (p)
error = set_one_prio(p, niceval, error);
break;
case PRIO_PGRP:
if (who)
pgrp = find_vpid(who);
else
pgrp = task_pgrp(current);
do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
error = set_one_prio(p, niceval, error);
} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case PRIO_USER:
uid = make_kuid(cred->user_ns, who);
user = cred->user;
if (!who)
uid = cred->uid;
else if (!uid_eq(uid, cred->uid)) {
user = find_user(uid);
if (!user)
goto out_unlock; /* No processes for this user */
}
do_each_thread(g, p) {
if (uid_eq(task_uid(p), uid))
error = set_one_prio(p, niceval, error);
} while_each_thread(g, p);
if (!uid_eq(uid, cred->uid))
free_uid(user); /* For find_user() */
break;
}
out_unlock:
read_unlock(&tasklist_lock);
rcu_read_unlock();
out:
return error;
}
/*
* Ugh. To avoid negative return values, "getpriority()" will
* not return the normal nice-value, but a negated value that
* has been offset by 20 (ie it returns 40..1 instead of -20..19)
* to stay compatible.
*/
SYSCALL_DEFINE2(getpriority, int, which, int, who)
{
struct task_struct *g, *p;
struct user_struct *user;
const struct cred *cred = current_cred();
long niceval, retval = -ESRCH;
struct pid *pgrp;
kuid_t uid;
if (which > PRIO_USER || which < PRIO_PROCESS)
return -EINVAL;
rcu_read_lock();
read_lock(&tasklist_lock);
switch (which) {
case PRIO_PROCESS:
if (who)
p = find_task_by_vpid(who);
else
p = current;
if (p) {
niceval = nice_to_rlimit(task_nice(p));
if (niceval > retval)
retval = niceval;
}
break;
case PRIO_PGRP:
if (who)
pgrp = find_vpid(who);
else
pgrp = task_pgrp(current);
do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
niceval = nice_to_rlimit(task_nice(p));
if (niceval > retval)
retval = niceval;
} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case PRIO_USER:
uid = make_kuid(cred->user_ns, who);
user = cred->user;
if (!who)
uid = cred->uid;
else if (!uid_eq(uid, cred->uid)) {
user = find_user(uid);
if (!user)
goto out_unlock; /* No processes for this user */
}
do_each_thread(g, p) {
if (uid_eq(task_uid(p), uid)) {
niceval = nice_to_rlimit(task_nice(p));
if (niceval > retval)
retval = niceval;
}
} while_each_thread(g, p);
if (!uid_eq(uid, cred->uid))
free_uid(user); /* for find_user() */
break;
}
out_unlock:
read_unlock(&tasklist_lock);
rcu_read_unlock();
return retval;
}
/*
* Unprivileged users may change the real gid to the effective gid
* or vice versa. (BSD-style)
*
* If you set the real gid at all, or set the effective gid to a value not
* equal to the real gid, then the saved gid is set to the new effective gid.
*
* This makes it possible for a setgid program to completely drop its
* privileges, which is often a useful assertion to make when you are doing
* a security audit over a program.
*
* The general idea is that a program which uses just setregid() will be
* 100% compatible with BSD. A program which uses just setgid() will be
* 100% compatible with POSIX with saved IDs.
*
* SMP: There are not races, the GIDs are checked only by filesystem
* operations (as far as semantic preservation is concerned).
*/
#ifdef CONFIG_MULTIUSER
SYSCALL_DEFINE2(setregid, gid_t, rgid, gid_t, egid)
{
struct user_namespace *ns = current_user_ns();
const struct cred *old;
struct cred *new;
int retval;
kgid_t krgid, kegid;
krgid = make_kgid(ns, rgid);
kegid = make_kgid(ns, egid);
if ((rgid != (gid_t) -1) && !gid_valid(krgid))
return -EINVAL;
if ((egid != (gid_t) -1) && !gid_valid(kegid))
return -EINVAL;
new = prepare_creds();
if (!new)
return -ENOMEM;
old = current_cred();
retval = -EPERM;
if (rgid != (gid_t) -1) {
if (gid_eq(old->gid, krgid) ||
gid_eq(old->egid, krgid) ||
ns_capable(old->user_ns, CAP_SETGID))
new->gid = krgid;
else
goto error;
}
if (egid != (gid_t) -1) {
if (gid_eq(old->gid, kegid) ||
gid_eq(old->egid, kegid) ||
gid_eq(old->sgid, kegid) ||
ns_capable(old->user_ns, CAP_SETGID))
new->egid = kegid;
else
goto error;
}
if (rgid != (gid_t) -1 ||
(egid != (gid_t) -1 && !gid_eq(kegid, old->gid)))
new->sgid = new->egid;
new->fsgid = new->egid;
return commit_creds(new);
error:
abort_creds(new);
return retval;
}
/*
* setgid() is implemented like SysV w/ SAVED_IDS
*
* SMP: Same implicit races as above.
*/
SYSCALL_DEFINE1(setgid, gid_t, gid)
{
struct user_namespace *ns = current_user_ns();
const struct cred *old;
struct cred *new;
int retval;
kgid_t kgid;
kgid = make_kgid(ns, gid);
if (!gid_valid(kgid))
return -EINVAL;
new = prepare_creds();
if (!new)
return -ENOMEM;
old = current_cred();
retval = -EPERM;
if (ns_capable(old->user_ns, CAP_SETGID))
new->gid = new->egid = new->sgid = new->fsgid = kgid;
else if (gid_eq(kgid, old->gid) || gid_eq(kgid, old->sgid))
new->egid = new->fsgid = kgid;
else
goto error;
return commit_creds(new);
error:
abort_creds(new);
return retval;
}
/*
* change the user struct in a credentials set to match the new UID
*/
static int set_user(struct cred *new)
{
struct user_struct *new_user;
new_user = alloc_uid(new->uid);
if (!new_user)
return -EAGAIN;
/*
* We don't fail in case of NPROC limit excess here because too many
* poorly written programs don't check set*uid() return code, assuming
* it never fails if called by root. We may still enforce NPROC limit
* for programs doing set*uid()+execve() by harmlessly deferring the
* failure to the execve() stage.
*/
if (atomic_read(&new_user->processes) >= rlimit(RLIMIT_NPROC) &&
new_user != INIT_USER)
current->flags |= PF_NPROC_EXCEEDED;
else
current->flags &= ~PF_NPROC_EXCEEDED;
free_uid(new->user);
new->user = new_user;
return 0;
}
/*
* Unprivileged users may change the real uid to the effective uid
* or vice versa. (BSD-style)
*
* If you set the real uid at all, or set the effective uid to a value not
* equal to the real uid, then the saved uid is set to the new effective uid.
*
* This makes it possible for a setuid program to completely drop its
* privileges, which is often a useful assertion to make when you are doing
* a security audit over a program.
*
* The general idea is that a program which uses just setreuid() will be
* 100% compatible with BSD. A program which uses just setuid() will be
* 100% compatible with POSIX with saved IDs.
*/
SYSCALL_DEFINE2(setreuid, uid_t, ruid, uid_t, euid)
{
struct user_namespace *ns = current_user_ns();
const struct cred *old;
struct cred *new;
int retval;
kuid_t kruid, keuid;
kruid = make_kuid(ns, ruid);
keuid = make_kuid(ns, euid);
if ((ruid != (uid_t) -1) && !uid_valid(kruid))
return -EINVAL;
if ((euid != (uid_t) -1) && !uid_valid(keuid))
return -EINVAL;
new = prepare_creds();
if (!new)
return -ENOMEM;
old = current_cred();
retval = -EPERM;
if (ruid != (uid_t) -1) {
new->uid = kruid;
if (!uid_eq(old->uid, kruid) &&
!uid_eq(old->euid, kruid) &&
!ns_capable(old->user_ns, CAP_SETUID))
goto error;
}
if (euid != (uid_t) -1) {
new->euid = keuid;
if (!uid_eq(old->uid, keuid) &&
!uid_eq(old->euid, keuid) &&
!uid_eq(old->suid, keuid) &&
!ns_capable(old->user_ns, CAP_SETUID))
goto error;
}
if (!uid_eq(new->uid, old->uid)) {
retval = set_user(new);
if (retval < 0)
goto error;
}
if (ruid != (uid_t) -1 ||
(euid != (uid_t) -1 && !uid_eq(keuid, old->uid)))
new->suid = new->euid;
new->fsuid = new->euid;
retval = security_task_fix_setuid(new, old, LSM_SETID_RE);
if (retval < 0)
goto error;
return commit_creds(new);
error:
abort_creds(new);
return retval;
}
/*
* setuid() is implemented like SysV with SAVED_IDS
*
* Note that SAVED_ID's is deficient in that a setuid root program
* like sendmail, for example, cannot set its uid to be a normal
* user and then switch back, because if you're root, setuid() sets
* the saved uid too. If you don't like this, blame the bright people
* in the POSIX committee and/or USG. Note that the BSD-style setreuid()
* will allow a root program to temporarily drop privileges and be able to
* regain them by swapping the real and effective uid.
*/
SYSCALL_DEFINE1(setuid, uid_t, uid)
{
struct user_namespace *ns = current_user_ns();
const struct cred *old;
struct cred *new;
int retval;
kuid_t kuid;
kuid = make_kuid(ns, uid);
if (!uid_valid(kuid))
return -EINVAL;
new = prepare_creds();
if (!new)
return -ENOMEM;
old = current_cred();
retval = -EPERM;
if (ns_capable(old->user_ns, CAP_SETUID)) {
new->suid = new->uid = kuid;
if (!uid_eq(kuid, old->uid)) {
retval = set_user(new);
if (retval < 0)
goto error;
}
} else if (!uid_eq(kuid, old->uid) && !uid_eq(kuid, new->suid)) {
goto error;
}
new->fsuid = new->euid = kuid;
retval = security_task_fix_setuid(new, old, LSM_SETID_ID);
if (retval < 0)
goto error;
return commit_creds(new);
error:
abort_creds(new);
return retval;
}
/*
* This function implements a generic ability to update ruid, euid,
* and suid. This allows you to implement the 4.4 compatible seteuid().
*/
SYSCALL_DEFINE3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid)
{
struct user_namespace *ns = current_user_ns();
const struct cred *old;
struct cred *new;
int retval;
kuid_t kruid, keuid, ksuid;
kruid = make_kuid(ns, ruid);
keuid = make_kuid(ns, euid);
ksuid = make_kuid(ns, suid);
if ((ruid != (uid_t) -1) && !uid_valid(kruid))
return -EINVAL;
if ((euid != (uid_t) -1) && !uid_valid(keuid))
return -EINVAL;
if ((suid != (uid_t) -1) && !uid_valid(ksuid))
return -EINVAL;
new = prepare_creds();
if (!new)
return -ENOMEM;
old = current_cred();
retval = -EPERM;
if (!ns_capable(old->user_ns, CAP_SETUID)) {
if (ruid != (uid_t) -1 && !uid_eq(kruid, old->uid) &&
!uid_eq(kruid, old->euid) && !uid_eq(kruid, old->suid))
goto error;
if (euid != (uid_t) -1 && !uid_eq(keuid, old->uid) &&
!uid_eq(keuid, old->euid) && !uid_eq(keuid, old->suid))
goto error;
if (suid != (uid_t) -1 && !uid_eq(ksuid, old->uid) &&
!uid_eq(ksuid, old->euid) && !uid_eq(ksuid, old->suid))
goto error;
}
if (ruid != (uid_t) -1) {
new->uid = kruid;
if (!uid_eq(kruid, old->uid)) {
retval = set_user(new);
if (retval < 0)
goto error;
}
}
if (euid != (uid_t) -1)
new->euid = keuid;
if (suid != (uid_t) -1)
new->suid = ksuid;
new->fsuid = new->euid;
retval = security_task_fix_setuid(new, old, LSM_SETID_RES);
if (retval < 0)
goto error;
return commit_creds(new);
error:
abort_creds(new);
return retval;
}
SYSCALL_DEFINE3(getresuid, uid_t __user *, ruidp, uid_t __user *, euidp, uid_t __user *, suidp)
{
const struct cred *cred = current_cred();
int retval;
uid_t ruid, euid, suid;
ruid = from_kuid_munged(cred->user_ns, cred->uid);
euid = from_kuid_munged(cred->user_ns, cred->euid);
suid = from_kuid_munged(cred->user_ns, cred->suid);
retval = put_user(ruid, ruidp);
if (!retval) {
retval = put_user(euid, euidp);
if (!retval)
return put_user(suid, suidp);
}
return retval;
}
/*
* Same as above, but for rgid, egid, sgid.
*/
SYSCALL_DEFINE3(setresgid, gid_t, rgid, gid_t, egid, gid_t, sgid)
{
struct user_namespace *ns = current_user_ns();
const struct cred *old;
struct cred *new;
int retval;
kgid_t krgid, kegid, ksgid;
krgid = make_kgid(ns, rgid);
kegid = make_kgid(ns, egid);
ksgid = make_kgid(ns, sgid);
if ((rgid != (gid_t) -1) && !gid_valid(krgid))
return -EINVAL;
if ((egid != (gid_t) -1) && !gid_valid(kegid))
return -EINVAL;
if ((sgid != (gid_t) -1) && !gid_valid(ksgid))
return -EINVAL;
new = prepare_creds();
if (!new)
return -ENOMEM;
old = current_cred();
retval = -EPERM;
if (!ns_capable(old->user_ns, CAP_SETGID)) {
if (rgid != (gid_t) -1 && !gid_eq(krgid, old->gid) &&
!gid_eq(krgid, old->egid) && !gid_eq(krgid, old->sgid))
goto error;
if (egid != (gid_t) -1 && !gid_eq(kegid, old->gid) &&
!gid_eq(kegid, old->egid) && !gid_eq(kegid, old->sgid))
goto error;
if (sgid != (gid_t) -1 && !gid_eq(ksgid, old->gid) &&
!gid_eq(ksgid, old->egid) && !gid_eq(ksgid, old->sgid))
goto error;
}
if (rgid != (gid_t) -1)
new->gid = krgid;
if (egid != (gid_t) -1)
new->egid = kegid;
if (sgid != (gid_t) -1)
new->sgid = ksgid;
new->fsgid = new->egid;
return commit_creds(new);
error:
abort_creds(new);
return retval;
}
SYSCALL_DEFINE3(getresgid, gid_t __user *, rgidp, gid_t __user *, egidp, gid_t __user *, sgidp)
{
const struct cred *cred = current_cred();
int retval;
gid_t rgid, egid, sgid;
rgid = from_kgid_munged(cred->user_ns, cred->gid);
egid = from_kgid_munged(cred->user_ns, cred->egid);
sgid = from_kgid_munged(cred->user_ns, cred->sgid);
retval = put_user(rgid, rgidp);
if (!retval) {
retval = put_user(egid, egidp);
if (!retval)
retval = put_user(sgid, sgidp);
}
return retval;
}
/*
* "setfsuid()" sets the fsuid - the uid used for filesystem checks. This
* is used for "access()" and for the NFS daemon (letting nfsd stay at
* whatever uid it wants to). It normally shadows "euid", except when
* explicitly set by setfsuid() or for access..
*/
SYSCALL_DEFINE1(setfsuid, uid_t, uid)
{
const struct cred *old;
struct cred *new;
uid_t old_fsuid;
kuid_t kuid;
old = current_cred();
old_fsuid = from_kuid_munged(old->user_ns, old->fsuid);
kuid = make_kuid(old->user_ns, uid);
if (!uid_valid(kuid))
return old_fsuid;
new = prepare_creds();
if (!new)
return old_fsuid;
if (uid_eq(kuid, old->uid) || uid_eq(kuid, old->euid) ||
uid_eq(kuid, old->suid) || uid_eq(kuid, old->fsuid) ||
ns_capable(old->user_ns, CAP_SETUID)) {
if (!uid_eq(kuid, old->fsuid)) {
new->fsuid = kuid;
if (security_task_fix_setuid(new, old, LSM_SETID_FS) == 0)
goto change_okay;
}
}
abort_creds(new);
return old_fsuid;
change_okay:
commit_creds(new);
return old_fsuid;
}
/*
* Samma på svenska..
*/
SYSCALL_DEFINE1(setfsgid, gid_t, gid)
{
const struct cred *old;
struct cred *new;
gid_t old_fsgid;
kgid_t kgid;
old = current_cred();
old_fsgid = from_kgid_munged(old->user_ns, old->fsgid);
kgid = make_kgid(old->user_ns, gid);
if (!gid_valid(kgid))
return old_fsgid;
new = prepare_creds();
if (!new)
return old_fsgid;
if (gid_eq(kgid, old->gid) || gid_eq(kgid, old->egid) ||
gid_eq(kgid, old->sgid) || gid_eq(kgid, old->fsgid) ||
ns_capable(old->user_ns, CAP_SETGID)) {
if (!gid_eq(kgid, old->fsgid)) {
new->fsgid = kgid;
goto change_okay;
}
}
abort_creds(new);
return old_fsgid;
change_okay:
commit_creds(new);
return old_fsgid;
}
#endif /* CONFIG_MULTIUSER */
/**
* sys_getpid - return the thread group id of the current process
*
* Note, despite the name, this returns the tgid not the pid. The tgid and
* the pid are identical unless CLONE_THREAD was specified on clone() in
* which case the tgid is the same in all threads of the same group.
*
* This is SMP safe as current->tgid does not change.
*/
SYSCALL_DEFINE0(getpid)
{
return task_tgid_vnr(current);
}
/* Thread ID - the internal kernel "pid" */
SYSCALL_DEFINE0(gettid)
{
return task_pid_vnr(current);
}
/*
* Accessing ->real_parent is not SMP-safe, it could
* change from under us. However, we can use a stale
* value of ->real_parent under rcu_read_lock(), see
* release_task()->call_rcu(delayed_put_task_struct).
*/
SYSCALL_DEFINE0(getppid)
{
int pid;
rcu_read_lock();
pid = task_tgid_vnr(rcu_dereference(current->real_parent));
rcu_read_unlock();
return pid;
}
SYSCALL_DEFINE0(getuid)
{
/* Only we change this so SMP safe */
return from_kuid_munged(current_user_ns(), current_uid());
}
SYSCALL_DEFINE0(geteuid)
{
/* Only we change this so SMP safe */
return from_kuid_munged(current_user_ns(), current_euid());
}
SYSCALL_DEFINE0(getgid)
{
/* Only we change this so SMP safe */
return from_kgid_munged(current_user_ns(), current_gid());
}
SYSCALL_DEFINE0(getegid)
{
/* Only we change this so SMP safe */
return from_kgid_munged(current_user_ns(), current_egid());
}
void do_sys_times(struct tms *tms)
{
cputime_t tgutime, tgstime, cutime, cstime;
thread_group_cputime_adjusted(current, &tgutime, &tgstime);
cutime = current->signal->cutime;
cstime = current->signal->cstime;
tms->tms_utime = cputime_to_clock_t(tgutime);
tms->tms_stime = cputime_to_clock_t(tgstime);
tms->tms_cutime = cputime_to_clock_t(cutime);
tms->tms_cstime = cputime_to_clock_t(cstime);
}
SYSCALL_DEFINE1(times, struct tms __user *, tbuf)
{
if (tbuf) {
struct tms tmp;
do_sys_times(&tmp);
if (copy_to_user(tbuf, &tmp, sizeof(struct tms)))
return -EFAULT;
}
force_successful_syscall_return();
return (long) jiffies_64_to_clock_t(get_jiffies_64());
}
/*
* This needs some heavy checking ...
* I just haven't the stomach for it. I also don't fully
* understand sessions/pgrp etc. Let somebody who does explain it.
*
* OK, I think I have the protection semantics right.... this is really
* only important on a multi-user system anyway, to make sure one user
* can't send a signal to a process owned by another. -TYT, 12/12/91
*
* !PF_FORKNOEXEC check to conform completely to POSIX.
*/
SYSCALL_DEFINE2(setpgid, pid_t, pid, pid_t, pgid)
{
struct task_struct *p;
struct task_struct *group_leader = current->group_leader;
struct pid *pgrp;
int err;
if (!pid)
pid = task_pid_vnr(group_leader);
if (!pgid)
pgid = pid;
if (pgid < 0)
return -EINVAL;
rcu_read_lock();
/* From this point forward we keep holding onto the tasklist lock
* so that our parent does not change from under us. -DaveM
*/
write_lock_irq(&tasklist_lock);
err = -ESRCH;
p = find_task_by_vpid(pid);
if (!p)
goto out;
err = -EINVAL;
if (!thread_group_leader(p))
goto out;
if (same_thread_group(p->real_parent, group_leader)) {
err = -EPERM;
if (task_session(p) != task_session(group_leader))
goto out;
err = -EACCES;
if (!(p->flags & PF_FORKNOEXEC))
goto out;
} else {
err = -ESRCH;
if (p != group_leader)
goto out;
}
err = -EPERM;
if (p->signal->leader)
goto out;
pgrp = task_pid(p);
if (pgid != pid) {
struct task_struct *g;
pgrp = find_vpid(pgid);
g = pid_task(pgrp, PIDTYPE_PGID);
if (!g || task_session(g) != task_session(group_leader))
goto out;
}
err = security_task_setpgid(p, pgid);
if (err)
goto out;
if (task_pgrp(p) != pgrp)
change_pid(p, PIDTYPE_PGID, pgrp);
err = 0;
out:
/* All paths lead to here, thus we are safe. -DaveM */
write_unlock_irq(&tasklist_lock);
rcu_read_unlock();
return err;
}
SYSCALL_DEFINE1(getpgid, pid_t, pid)
{
struct task_struct *p;
struct pid *grp;
int retval;
rcu_read_lock();
if (!pid)
grp = task_pgrp(current);
else {
retval = -ESRCH;
p = find_task_by_vpid(pid);
if (!p)
goto out;
grp = task_pgrp(p);
if (!grp)
goto out;
retval = security_task_getpgid(p);
if (retval)
goto out;
}
retval = pid_vnr(grp);
out:
rcu_read_unlock();
return retval;
}
#ifdef __ARCH_WANT_SYS_GETPGRP
SYSCALL_DEFINE0(getpgrp)
{
return sys_getpgid(0);
}
#endif
SYSCALL_DEFINE1(getsid, pid_t, pid)
{
struct task_struct *p;
struct pid *sid;
int retval;
rcu_read_lock();
if (!pid)
sid = task_session(current);
else {
retval = -ESRCH;
p = find_task_by_vpid(pid);
if (!p)
goto out;
sid = task_session(p);
if (!sid)
goto out;
retval = security_task_getsid(p);
if (retval)
goto out;
}
retval = pid_vnr(sid);
out:
rcu_read_unlock();
return retval;
}
static void set_special_pids(struct pid *pid)
{
struct task_struct *curr = current->group_leader;
if (task_session(curr) != pid)
change_pid(curr, PIDTYPE_SID, pid);
if (task_pgrp(curr) != pid)
change_pid(curr, PIDTYPE_PGID, pid);
}
SYSCALL_DEFINE0(setsid)
{
struct task_struct *group_leader = current->group_leader;
struct pid *sid = task_pid(group_leader);
pid_t session = pid_vnr(sid);
int err = -EPERM;
write_lock_irq(&tasklist_lock);
/* Fail if I am already a session leader */
if (group_leader->signal->leader)
goto out;
/* Fail if a process group id already exists that equals the
* proposed session id.
*/
if (pid_task(sid, PIDTYPE_PGID))
goto out;
group_leader->signal->leader = 1;
set_special_pids(sid);
proc_clear_tty(group_leader);
err = session;
out:
write_unlock_irq(&tasklist_lock);
if (err > 0) {
proc_sid_connector(group_leader);
sched_autogroup_create_attach(group_leader);
}
return err;
}
DECLARE_RWSEM(uts_sem);
#ifdef COMPAT_UTS_MACHINE
#define override_architecture(name) \
(personality(current->personality) == PER_LINUX32 && \
copy_to_user(name->machine, COMPAT_UTS_MACHINE, \
sizeof(COMPAT_UTS_MACHINE)))
#else
#define override_architecture(name) 0
#endif
/*
* Work around broken programs that cannot handle "Linux 3.0".
* Instead we map 3.x to 2.6.40+x, so e.g. 3.0 would be 2.6.40
* And we map 4.x to 2.6.60+x, so 4.0 would be 2.6.60.
*/
static int override_release(char __user *release, size_t len)
{
int ret = 0;
if (current->personality & UNAME26) {
const char *rest = UTS_RELEASE;
char buf[65] = { 0 };
int ndots = 0;
unsigned v;
size_t copy;
while (*rest) {
if (*rest == '.' && ++ndots >= 3)
break;
if (!isdigit(*rest) && *rest != '.')
break;
rest++;
}
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 60;
copy = clamp_t(size_t, len, 1, sizeof(buf));
copy = scnprintf(buf, copy, "2.6.%u%s", v, rest);
ret = copy_to_user(release, buf, copy + 1);
}
return ret;
}
SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
{
int errno = 0;
down_read(&uts_sem);
if (copy_to_user(name, utsname(), sizeof *name))
errno = -EFAULT;
up_read(&uts_sem);
if (!errno && override_release(name->release, sizeof(name->release)))
errno = -EFAULT;
if (!errno && override_architecture(name))
errno = -EFAULT;
return errno;
}
#ifdef __ARCH_WANT_SYS_OLD_UNAME
/*
* Old cruft
*/
SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
{
int error = 0;
if (!name)
return -EFAULT;
down_read(&uts_sem);
if (copy_to_user(name, utsname(), sizeof(*name)))
error = -EFAULT;
up_read(&uts_sem);
if (!error && override_release(name->release, sizeof(name->release)))
error = -EFAULT;
if (!error && override_architecture(name))
error = -EFAULT;
return error;
}
SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= __put_user(0, name->machine + __OLD_UTS_LEN);
up_read(&uts_sem);
if (!error && override_architecture(name))
error = -EFAULT;
if (!error && override_release(name->release, sizeof(name->release)))
error = -EFAULT;
return error ? -EFAULT : 0;
}
#endif
SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
{
int errno;
char tmp[__NEW_UTS_LEN];
if (!ns_capable(current->nsproxy->uts_ns->user_ns, CAP_SYS_ADMIN))
return -EPERM;
if (len < 0 || len > __NEW_UTS_LEN)
return -EINVAL;
down_write(&uts_sem);
errno = -EFAULT;
if (!copy_from_user(tmp, name, len)) {
struct new_utsname *u = utsname();
memcpy(u->nodename, tmp, len);
memset(u->nodename + len, 0, sizeof(u->nodename) - len);
errno = 0;
uts_proc_notify(UTS_PROC_HOSTNAME);
}
up_write(&uts_sem);
return errno;
}
#ifdef __ARCH_WANT_SYS_GETHOSTNAME
SYSCALL_DEFINE2(gethostname, char __user *, name, int, len)
{
int i, errno;
struct new_utsname *u;
if (len < 0)
return -EINVAL;
down_read(&uts_sem);
u = utsname();
i = 1 + strlen(u->nodename);
if (i > len)
i = len;
errno = 0;
if (copy_to_user(name, u->nodename, i))
errno = -EFAULT;
up_read(&uts_sem);
return errno;
}
#endif
/*
* Only setdomainname; getdomainname can be implemented by calling
* uname()
*/
SYSCALL_DEFINE2(setdomainname, char __user *, name, int, len)
{
int errno;
char tmp[__NEW_UTS_LEN];
if (!ns_capable(current->nsproxy->uts_ns->user_ns, CAP_SYS_ADMIN))
return -EPERM;
if (len < 0 || len > __NEW_UTS_LEN)
return -EINVAL;
down_write(&uts_sem);
errno = -EFAULT;
if (!copy_from_user(tmp, name, len)) {
struct new_utsname *u = utsname();
memcpy(u->domainname, tmp, len);
memset(u->domainname + len, 0, sizeof(u->domainname) - len);
errno = 0;
uts_proc_notify(UTS_PROC_DOMAINNAME);
}
up_write(&uts_sem);
return errno;
}
SYSCALL_DEFINE2(getrlimit, unsigned int, resource, struct rlimit __user *, rlim)
{
struct rlimit value;
int ret;
ret = do_prlimit(current, resource, NULL, &value);
if (!ret)
ret = copy_to_user(rlim, &value, sizeof(*rlim)) ? -EFAULT : 0;
return ret;
}
#ifdef __ARCH_WANT_SYS_OLD_GETRLIMIT
/*
* Back compatibility for getrlimit. Needed for some apps.
*/
SYSCALL_DEFINE2(old_getrlimit, unsigned int, resource,
struct rlimit __user *, rlim)
{
struct rlimit x;
if (resource >= RLIM_NLIMITS)
return -EINVAL;
task_lock(current->group_leader);
x = current->signal->rlim[resource];
task_unlock(current->group_leader);
if (x.rlim_cur > 0x7FFFFFFF)
x.rlim_cur = 0x7FFFFFFF;
if (x.rlim_max > 0x7FFFFFFF)
x.rlim_max = 0x7FFFFFFF;
return copy_to_user(rlim, &x, sizeof(x)) ? -EFAULT : 0;
}
#endif
static inline bool rlim64_is_infinity(__u64 rlim64)
{
#if BITS_PER_LONG < 64
return rlim64 >= ULONG_MAX;
#else
return rlim64 == RLIM64_INFINITY;
#endif
}
static void rlim_to_rlim64(const struct rlimit *rlim, struct rlimit64 *rlim64)
{
if (rlim->rlim_cur == RLIM_INFINITY)
rlim64->rlim_cur = RLIM64_INFINITY;
else
rlim64->rlim_cur = rlim->rlim_cur;
if (rlim->rlim_max == RLIM_INFINITY)
rlim64->rlim_max = RLIM64_INFINITY;
else
rlim64->rlim_max = rlim->rlim_max;
}
static void rlim64_to_rlim(const struct rlimit64 *rlim64, struct rlimit *rlim)
{
if (rlim64_is_infinity(rlim64->rlim_cur))
rlim->rlim_cur = RLIM_INFINITY;
else
rlim->rlim_cur = (unsigned long)rlim64->rlim_cur;
if (rlim64_is_infinity(rlim64->rlim_max))
rlim->rlim_max = RLIM_INFINITY;
else
rlim->rlim_max = (unsigned long)rlim64->rlim_max;
}
/* make sure you are allowed to change @tsk limits before calling this */
int do_prlimit(struct task_struct *tsk, unsigned int resource,
struct rlimit *new_rlim, struct rlimit *old_rlim)
{
struct rlimit *rlim;
int retval = 0;
if (resource >= RLIM_NLIMITS)
return -EINVAL;
if (new_rlim) {
if (new_rlim->rlim_cur > new_rlim->rlim_max)
return -EINVAL;
if (resource == RLIMIT_NOFILE &&
new_rlim->rlim_max > sysctl_nr_open)
return -EPERM;
}
/* protect tsk->signal and tsk->sighand from disappearing */
read_lock(&tasklist_lock);
if (!tsk->sighand) {
retval = -ESRCH;
goto out;
}
rlim = tsk->signal->rlim + resource;
task_lock(tsk->group_leader);
if (new_rlim) {
/* Keep the capable check against init_user_ns until
cgroups can contain all limits */
if (new_rlim->rlim_max > rlim->rlim_max &&
!capable(CAP_SYS_RESOURCE))
retval = -EPERM;
if (!retval)
retval = security_task_setrlimit(tsk->group_leader,
resource, new_rlim);
if (resource == RLIMIT_CPU && new_rlim->rlim_cur == 0) {
/*
* The caller is asking for an immediate RLIMIT_CPU
* expiry. But we use the zero value to mean "it was
* never set". So let's cheat and make it one second
* instead
*/
new_rlim->rlim_cur = 1;
}
}
if (!retval) {
if (old_rlim)
*old_rlim = *rlim;
if (new_rlim)
*rlim = *new_rlim;
}
task_unlock(tsk->group_leader);
/*
* RLIMIT_CPU handling. Note that the kernel fails to return an error
* code if it rejected the user's attempt to set RLIMIT_CPU. This is a
* very long-standing error, and fixing it now risks breakage of
* applications, so we live with it
*/
if (!retval && new_rlim && resource == RLIMIT_CPU &&
new_rlim->rlim_cur != RLIM_INFINITY)
update_rlimit_cpu(tsk, new_rlim->rlim_cur);
out:
read_unlock(&tasklist_lock);
return retval;
}
/* rcu lock must be held */
static int check_prlimit_permission(struct task_struct *task)
{
const struct cred *cred = current_cred(), *tcred;
if (current == task)
return 0;
tcred = __task_cred(task);
if (uid_eq(cred->uid, tcred->euid) &&
uid_eq(cred->uid, tcred->suid) &&
uid_eq(cred->uid, tcred->uid) &&
gid_eq(cred->gid, tcred->egid) &&
gid_eq(cred->gid, tcred->sgid) &&
gid_eq(cred->gid, tcred->gid))
return 0;
if (ns_capable(tcred->user_ns, CAP_SYS_RESOURCE))
return 0;
return -EPERM;
}
SYSCALL_DEFINE4(prlimit64, pid_t, pid, unsigned int, resource,
const struct rlimit64 __user *, new_rlim,
struct rlimit64 __user *, old_rlim)
{
struct rlimit64 old64, new64;
struct rlimit old, new;
struct task_struct *tsk;
int ret;
if (new_rlim) {
if (copy_from_user(&new64, new_rlim, sizeof(new64)))
return -EFAULT;
rlim64_to_rlim(&new64, &new);
}
rcu_read_lock();
tsk = pid ? find_task_by_vpid(pid) : current;
if (!tsk) {
rcu_read_unlock();
return -ESRCH;
}
ret = check_prlimit_permission(tsk);
if (ret) {
rcu_read_unlock();
return ret;
}
get_task_struct(tsk);
rcu_read_unlock();
ret = do_prlimit(tsk, resource, new_rlim ? &new : NULL,
old_rlim ? &old : NULL);
if (!ret && old_rlim) {
rlim_to_rlim64(&old, &old64);
if (copy_to_user(old_rlim, &old64, sizeof(old64)))
ret = -EFAULT;
}
put_task_struct(tsk);
return ret;
}
SYSCALL_DEFINE2(setrlimit, unsigned int, resource, struct rlimit __user *, rlim)
{
struct rlimit new_rlim;
if (copy_from_user(&new_rlim, rlim, sizeof(*rlim)))
return -EFAULT;
return do_prlimit(current, resource, &new_rlim, NULL);
}
/*
* It would make sense to put struct rusage in the task_struct,
* except that would make the task_struct be *really big*. After
* task_struct gets moved into malloc'ed memory, it would
* make sense to do this. It will make moving the rest of the information
* a lot simpler! (Which we're not doing right now because we're not
* measuring them yet).
*
* When sampling multiple threads for RUSAGE_SELF, under SMP we might have
* races with threads incrementing their own counters. But since word
* reads are atomic, we either get new values or old values and we don't
* care which for the sums. We always take the siglock to protect reading
* the c* fields from p->signal from races with exit.c updating those
* fields when reaping, so a sample either gets all the additions of a
* given child after it's reaped, or none so this sample is before reaping.
*
* Locking:
* We need to take the siglock for CHILDEREN, SELF and BOTH
* for the cases current multithreaded, non-current single threaded
* non-current multithreaded. Thread traversal is now safe with
* the siglock held.
* Strictly speaking, we donot need to take the siglock if we are current and
* single threaded, as no one else can take our signal_struct away, no one
* else can reap the children to update signal->c* counters, and no one else
* can race with the signal-> fields. If we do not take any lock, the
* signal-> fields could be read out of order while another thread was just
* exiting. So we should place a read memory barrier when we avoid the lock.
* On the writer side, write memory barrier is implied in __exit_signal
* as __exit_signal releases the siglock spinlock after updating the signal->
* fields. But we don't do this yet to keep things simple.
*
*/
static void accumulate_thread_rusage(struct task_struct *t, struct rusage *r)
{
r->ru_nvcsw += t->nvcsw;
r->ru_nivcsw += t->nivcsw;
r->ru_minflt += t->min_flt;
r->ru_majflt += t->maj_flt;
r->ru_inblock += task_io_get_inblock(t);
r->ru_oublock += task_io_get_oublock(t);
}
static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
{
struct task_struct *t;
unsigned long flags;
cputime_t tgutime, tgstime, utime, stime;
unsigned long maxrss = 0;
memset((char *)r, 0, sizeof (*r));
utime = stime = 0;
if (who == RUSAGE_THREAD) {
task_cputime_adjusted(current, &utime, &stime);
accumulate_thread_rusage(p, r);
maxrss = p->signal->maxrss;
goto out;
}
if (!lock_task_sighand(p, &flags))
return;
switch (who) {
case RUSAGE_BOTH:
case RUSAGE_CHILDREN:
utime = p->signal->cutime;
stime = p->signal->cstime;
r->ru_nvcsw = p->signal->cnvcsw;
r->ru_nivcsw = p->signal->cnivcsw;
r->ru_minflt = p->signal->cmin_flt;
r->ru_majflt = p->signal->cmaj_flt;
r->ru_inblock = p->signal->cinblock;
r->ru_oublock = p->signal->coublock;
maxrss = p->signal->cmaxrss;
if (who == RUSAGE_CHILDREN)
break;
case RUSAGE_SELF:
thread_group_cputime_adjusted(p, &tgutime, &tgstime);
utime += tgutime;
stime += tgstime;
r->ru_nvcsw += p->signal->nvcsw;
r->ru_nivcsw += p->signal->nivcsw;
r->ru_minflt += p->signal->min_flt;
r->ru_majflt += p->signal->maj_flt;
r->ru_inblock += p->signal->inblock;
r->ru_oublock += p->signal->oublock;
if (maxrss < p->signal->maxrss)
maxrss = p->signal->maxrss;
t = p;
do {
accumulate_thread_rusage(t, r);
} while_each_thread(p, t);
break;
default:
BUG();
}
unlock_task_sighand(p, &flags);
out:
cputime_to_timeval(utime, &r->ru_utime);
cputime_to_timeval(stime, &r->ru_stime);
if (who != RUSAGE_CHILDREN) {
struct mm_struct *mm = get_task_mm(p);
if (mm) {
setmax_mm_hiwater_rss(&maxrss, mm);
mmput(mm);
}
}
r->ru_maxrss = maxrss * (PAGE_SIZE / 1024); /* convert pages to KBs */
}
int getrusage(struct task_struct *p, int who, struct rusage __user *ru)
{
struct rusage r;
k_getrusage(p, who, &r);
return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
}
SYSCALL_DEFINE2(getrusage, int, who, struct rusage __user *, ru)
{
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN &&
who != RUSAGE_THREAD)
return -EINVAL;
return getrusage(current, who, ru);
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(getrusage, int, who, struct compat_rusage __user *, ru)
{
struct rusage r;
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN &&
who != RUSAGE_THREAD)
return -EINVAL;
k_getrusage(current, who, &r);
return put_compat_rusage(&r, ru);
}
#endif
SYSCALL_DEFINE1(umask, int, mask)
{
mask = xchg(¤t->fs->umask, mask & S_IRWXUGO);
return mask;
}
static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
{
struct fd exe;
struct file *old_exe, *exe_file;
struct inode *inode;
int err;
exe = fdget(fd);
if (!exe.file)
return -EBADF;
inode = file_inode(exe.file);
/*
* Because the original mm->exe_file points to executable file, make
* sure that this one is executable as well, to avoid breaking an
* overall picture.
*/
err = -EACCES;
if (!S_ISREG(inode->i_mode) || path_noexec(&exe.file->f_path))
goto exit;
err = inode_permission(inode, MAY_EXEC);
if (err)
goto exit;
/*
* Forbid mm->exe_file change if old file still mapped.
*/
exe_file = get_mm_exe_file(mm);
err = -EBUSY;
if (exe_file) {
struct vm_area_struct *vma;
down_read(&mm->mmap_sem);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (!vma->vm_file)
continue;
if (path_equal(&vma->vm_file->f_path,
&exe_file->f_path))
goto exit_err;
}
up_read(&mm->mmap_sem);
fput(exe_file);
}
/*
* The symlink can be changed only once, just to disallow arbitrary
* transitions malicious software might bring in. This means one
* could make a snapshot over all processes running and monitor
* /proc/pid/exe changes to notice unusual activity if needed.
*/
err = -EPERM;
if (test_and_set_bit(MMF_EXE_FILE_CHANGED, &mm->flags))
goto exit;
err = 0;
/* set the new file, lockless */
get_file(exe.file);
old_exe = xchg(&mm->exe_file, exe.file);
if (old_exe)
fput(old_exe);
exit:
fdput(exe);
return err;
exit_err:
up_read(&mm->mmap_sem);
fput(exe_file);
goto exit;
}
/*
* WARNING: we don't require any capability here so be very careful
* in what is allowed for modification from userspace.
*/
static int validate_prctl_map(struct prctl_mm_map *prctl_map)
{
unsigned long mmap_max_addr = TASK_SIZE;
struct mm_struct *mm = current->mm;
int error = -EINVAL, i;
static const unsigned char offsets[] = {
offsetof(struct prctl_mm_map, start_code),
offsetof(struct prctl_mm_map, end_code),
offsetof(struct prctl_mm_map, start_data),
offsetof(struct prctl_mm_map, end_data),
offsetof(struct prctl_mm_map, start_brk),
offsetof(struct prctl_mm_map, brk),
offsetof(struct prctl_mm_map, start_stack),
offsetof(struct prctl_mm_map, arg_start),
offsetof(struct prctl_mm_map, arg_end),
offsetof(struct prctl_mm_map, env_start),
offsetof(struct prctl_mm_map, env_end),
};
/*
* Make sure the members are not somewhere outside
* of allowed address space.
*/
for (i = 0; i < ARRAY_SIZE(offsets); i++) {
u64 val = *(u64 *)((char *)prctl_map + offsets[i]);
if ((unsigned long)val >= mmap_max_addr ||
(unsigned long)val < mmap_min_addr)
goto out;
}
/*
* Make sure the pairs are ordered.
*/
#define __prctl_check_order(__m1, __op, __m2) \
((unsigned long)prctl_map->__m1 __op \
(unsigned long)prctl_map->__m2) ? 0 : -EINVAL
error = __prctl_check_order(start_code, <, end_code);
error |= __prctl_check_order(start_data, <, end_data);
error |= __prctl_check_order(start_brk, <=, brk);
error |= __prctl_check_order(arg_start, <=, arg_end);
error |= __prctl_check_order(env_start, <=, env_end);
if (error)
goto out;
#undef __prctl_check_order
error = -EINVAL;
/*
* @brk should be after @end_data in traditional maps.
*/
if (prctl_map->start_brk <= prctl_map->end_data ||
prctl_map->brk <= prctl_map->end_data)
goto out;
/*
* Neither we should allow to override limits if they set.
*/
if (check_data_rlimit(rlimit(RLIMIT_DATA), prctl_map->brk,
prctl_map->start_brk, prctl_map->end_data,
prctl_map->start_data))
goto out;
/*
* Someone is trying to cheat the auxv vector.
*/
if (prctl_map->auxv_size) {
if (!prctl_map->auxv || prctl_map->auxv_size > sizeof(mm->saved_auxv))
goto out;
}
/*
* Finally, make sure the caller has the rights to
* change /proc/pid/exe link: only local root should
* be allowed to.
*/
if (prctl_map->exe_fd != (u32)-1) {
struct user_namespace *ns = current_user_ns();
const struct cred *cred = current_cred();
if (!uid_eq(cred->uid, make_kuid(ns, 0)) ||
!gid_eq(cred->gid, make_kgid(ns, 0)))
goto out;
}
error = 0;
out:
return error;
}
#ifdef CONFIG_CHECKPOINT_RESTORE
static int prctl_set_mm_map(int opt, const void __user *addr, unsigned long data_size)
{
struct prctl_mm_map prctl_map = { .exe_fd = (u32)-1, };
unsigned long user_auxv[AT_VECTOR_SIZE];
struct mm_struct *mm = current->mm;
int error;
BUILD_BUG_ON(sizeof(user_auxv) != sizeof(mm->saved_auxv));
BUILD_BUG_ON(sizeof(struct prctl_mm_map) > 256);
if (opt == PR_SET_MM_MAP_SIZE)
return put_user((unsigned int)sizeof(prctl_map),
(unsigned int __user *)addr);
if (data_size != sizeof(prctl_map))
return -EINVAL;
if (copy_from_user(&prctl_map, addr, sizeof(prctl_map)))
return -EFAULT;
error = validate_prctl_map(&prctl_map);
if (error)
return error;
if (prctl_map.auxv_size) {
memset(user_auxv, 0, sizeof(user_auxv));
if (copy_from_user(user_auxv,
(const void __user *)prctl_map.auxv,
prctl_map.auxv_size))
return -EFAULT;
/* Last entry must be AT_NULL as specification requires */
user_auxv[AT_VECTOR_SIZE - 2] = AT_NULL;
user_auxv[AT_VECTOR_SIZE - 1] = AT_NULL;
}
if (prctl_map.exe_fd != (u32)-1)
error = prctl_set_mm_exe_file(mm, prctl_map.exe_fd);
down_read(&mm->mmap_sem);
if (error)
goto out;
/*
* We don't validate if these members are pointing to
* real present VMAs because application may have correspond
* VMAs already unmapped and kernel uses these members for statistics
* output in procfs mostly, except
*
* - @start_brk/@brk which are used in do_brk but kernel lookups
* for VMAs when updating these memvers so anything wrong written
* here cause kernel to swear at userspace program but won't lead
* to any problem in kernel itself
*/
mm->start_code = prctl_map.start_code;
mm->end_code = prctl_map.end_code;
mm->start_data = prctl_map.start_data;
mm->end_data = prctl_map.end_data;
mm->start_brk = prctl_map.start_brk;
mm->brk = prctl_map.brk;
mm->start_stack = prctl_map.start_stack;
mm->arg_start = prctl_map.arg_start;
mm->arg_end = prctl_map.arg_end;
mm->env_start = prctl_map.env_start;
mm->env_end = prctl_map.env_end;
/*
* Note this update of @saved_auxv is lockless thus
* if someone reads this member in procfs while we're
* updating -- it may get partly updated results. It's
* known and acceptable trade off: we leave it as is to
* not introduce additional locks here making the kernel
* more complex.
*/
if (prctl_map.auxv_size)
memcpy(mm->saved_auxv, user_auxv, sizeof(user_auxv));
error = 0;
out:
up_read(&mm->mmap_sem);
return error;
}
#endif /* CONFIG_CHECKPOINT_RESTORE */
static int prctl_set_auxv(struct mm_struct *mm, unsigned long addr,
unsigned long len)
{
/*
* This doesn't move the auxiliary vector itself since it's pinned to
* mm_struct, but it permits filling the vector with new values. It's
* up to the caller to provide sane values here, otherwise userspace
* tools which use this vector might be unhappy.
*/
unsigned long user_auxv[AT_VECTOR_SIZE];
if (len > sizeof(user_auxv))
return -EINVAL;
if (copy_from_user(user_auxv, (const void __user *)addr, len))
return -EFAULT;
/* Make sure the last entry is always AT_NULL */
user_auxv[AT_VECTOR_SIZE - 2] = 0;
user_auxv[AT_VECTOR_SIZE - 1] = 0;
BUILD_BUG_ON(sizeof(user_auxv) != sizeof(mm->saved_auxv));
task_lock(current);
memcpy(mm->saved_auxv, user_auxv, len);
task_unlock(current);
return 0;
}
static int prctl_set_mm(int opt, unsigned long addr,
unsigned long arg4, unsigned long arg5)
{
struct mm_struct *mm = current->mm;
struct prctl_mm_map prctl_map;
struct vm_area_struct *vma;
int error;
if (arg5 || (arg4 && (opt != PR_SET_MM_AUXV &&
opt != PR_SET_MM_MAP &&
opt != PR_SET_MM_MAP_SIZE)))
return -EINVAL;
#ifdef CONFIG_CHECKPOINT_RESTORE
if (opt == PR_SET_MM_MAP || opt == PR_SET_MM_MAP_SIZE)
return prctl_set_mm_map(opt, (const void __user *)addr, arg4);
#endif
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
if (opt == PR_SET_MM_EXE_FILE)
return prctl_set_mm_exe_file(mm, (unsigned int)addr);
if (opt == PR_SET_MM_AUXV)
return prctl_set_auxv(mm, addr, arg4);
if (addr >= TASK_SIZE || addr < mmap_min_addr)
return -EINVAL;
error = -EINVAL;
down_read(&mm->mmap_sem);
vma = find_vma(mm, addr);
prctl_map.start_code = mm->start_code;
prctl_map.end_code = mm->end_code;
prctl_map.start_data = mm->start_data;
prctl_map.end_data = mm->end_data;
prctl_map.start_brk = mm->start_brk;
prctl_map.brk = mm->brk;
prctl_map.start_stack = mm->start_stack;
prctl_map.arg_start = mm->arg_start;
prctl_map.arg_end = mm->arg_end;
prctl_map.env_start = mm->env_start;
prctl_map.env_end = mm->env_end;
prctl_map.auxv = NULL;
prctl_map.auxv_size = 0;
prctl_map.exe_fd = -1;
switch (opt) {
case PR_SET_MM_START_CODE:
prctl_map.start_code = addr;
break;
case PR_SET_MM_END_CODE:
prctl_map.end_code = addr;
break;
case PR_SET_MM_START_DATA:
prctl_map.start_data = addr;
break;
case PR_SET_MM_END_DATA:
prctl_map.end_data = addr;
break;
case PR_SET_MM_START_STACK:
prctl_map.start_stack = addr;
break;
case PR_SET_MM_START_BRK:
prctl_map.start_brk = addr;
break;
case PR_SET_MM_BRK:
prctl_map.brk = addr;
break;
case PR_SET_MM_ARG_START:
prctl_map.arg_start = addr;
break;
case PR_SET_MM_ARG_END:
prctl_map.arg_end = addr;
break;
case PR_SET_MM_ENV_START:
prctl_map.env_start = addr;
break;
case PR_SET_MM_ENV_END:
prctl_map.env_end = addr;
break;
default:
goto out;
}
error = validate_prctl_map(&prctl_map);
if (error)
goto out;
switch (opt) {
/*
* If command line arguments and environment
* are placed somewhere else on stack, we can
* set them up here, ARG_START/END to setup
* command line argumets and ENV_START/END
* for environment.
*/
case PR_SET_MM_START_STACK:
case PR_SET_MM_ARG_START:
case PR_SET_MM_ARG_END:
case PR_SET_MM_ENV_START:
case PR_SET_MM_ENV_END:
if (!vma) {
error = -EFAULT;
goto out;
}
}
mm->start_code = prctl_map.start_code;
mm->end_code = prctl_map.end_code;
mm->start_data = prctl_map.start_data;
mm->end_data = prctl_map.end_data;
mm->start_brk = prctl_map.start_brk;
mm->brk = prctl_map.brk;
mm->start_stack = prctl_map.start_stack;
mm->arg_start = prctl_map.arg_start;
mm->arg_end = prctl_map.arg_end;
mm->env_start = prctl_map.env_start;
mm->env_end = prctl_map.env_end;
error = 0;
out:
up_read(&mm->mmap_sem);
return error;
}
#ifdef CONFIG_CHECKPOINT_RESTORE
static int prctl_get_tid_address(struct task_struct *me, int __user **tid_addr)
{
return put_user(me->clear_child_tid, tid_addr);
}
#else
static int prctl_get_tid_address(struct task_struct *me, int __user **tid_addr)
{
return -EINVAL;
}
#endif
SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
unsigned long, arg4, unsigned long, arg5)
{
struct task_struct *me = current;
unsigned char comm[sizeof(me->comm)];
long error;
error = security_task_prctl(option, arg2, arg3, arg4, arg5);
if (error != -ENOSYS)
return error;
error = 0;
switch (option) {
case PR_SET_PDEATHSIG:
if (!valid_signal(arg2)) {
error = -EINVAL;
break;
}
me->pdeath_signal = arg2;
break;
case PR_GET_PDEATHSIG:
error = put_user(me->pdeath_signal, (int __user *)arg2);
break;
case PR_GET_DUMPABLE:
error = get_dumpable(me->mm);
break;
case PR_SET_DUMPABLE:
if (arg2 != SUID_DUMP_DISABLE && arg2 != SUID_DUMP_USER) {
error = -EINVAL;
break;
}
set_dumpable(me->mm, arg2);
break;
case PR_SET_UNALIGN:
error = SET_UNALIGN_CTL(me, arg2);
break;
case PR_GET_UNALIGN:
error = GET_UNALIGN_CTL(me, arg2);
break;
case PR_SET_FPEMU:
error = SET_FPEMU_CTL(me, arg2);
break;
case PR_GET_FPEMU:
error = GET_FPEMU_CTL(me, arg2);
break;
case PR_SET_FPEXC:
error = SET_FPEXC_CTL(me, arg2);
break;
case PR_GET_FPEXC:
error = GET_FPEXC_CTL(me, arg2);
break;
case PR_GET_TIMING:
error = PR_TIMING_STATISTICAL;
break;
case PR_SET_TIMING:
if (arg2 != PR_TIMING_STATISTICAL)
error = -EINVAL;
break;
case PR_SET_NAME:
comm[sizeof(me->comm) - 1] = 0;
if (strncpy_from_user(comm, (char __user *)arg2,
sizeof(me->comm) - 1) < 0)
return -EFAULT;
set_task_comm(me, comm);
proc_comm_connector(me);
break;
case PR_GET_NAME:
get_task_comm(comm, me);
if (copy_to_user((char __user *)arg2, comm, sizeof(comm)))
return -EFAULT;
break;
case PR_GET_ENDIAN:
error = GET_ENDIAN(me, arg2);
break;
case PR_SET_ENDIAN:
error = SET_ENDIAN(me, arg2);
break;
case PR_GET_SECCOMP:
error = prctl_get_seccomp();
break;
case PR_SET_SECCOMP:
error = prctl_set_seccomp(arg2, (char __user *)arg3);
break;
case PR_GET_TSC:
error = GET_TSC_CTL(arg2);
break;
case PR_SET_TSC:
error = SET_TSC_CTL(arg2);
break;
case PR_TASK_PERF_EVENTS_DISABLE:
error = perf_event_task_disable();
break;
case PR_TASK_PERF_EVENTS_ENABLE:
error = perf_event_task_enable();
break;
case PR_GET_TIMERSLACK:
error = current->timer_slack_ns;
break;
case PR_SET_TIMERSLACK:
if (arg2 <= 0)
current->timer_slack_ns =
current->default_timer_slack_ns;
else
current->timer_slack_ns = arg2;
break;
case PR_MCE_KILL:
if (arg4 | arg5)
return -EINVAL;
switch (arg2) {
case PR_MCE_KILL_CLEAR:
if (arg3 != 0)
return -EINVAL;
current->flags &= ~PF_MCE_PROCESS;
break;
case PR_MCE_KILL_SET:
current->flags |= PF_MCE_PROCESS;
if (arg3 == PR_MCE_KILL_EARLY)
current->flags |= PF_MCE_EARLY;
else if (arg3 == PR_MCE_KILL_LATE)
current->flags &= ~PF_MCE_EARLY;
else if (arg3 == PR_MCE_KILL_DEFAULT)
current->flags &=
~(PF_MCE_EARLY|PF_MCE_PROCESS);
else
return -EINVAL;
break;
default:
return -EINVAL;
}
break;
case PR_MCE_KILL_GET:
if (arg2 | arg3 | arg4 | arg5)
return -EINVAL;
if (current->flags & PF_MCE_PROCESS)
error = (current->flags & PF_MCE_EARLY) ?
PR_MCE_KILL_EARLY : PR_MCE_KILL_LATE;
else
error = PR_MCE_KILL_DEFAULT;
break;
case PR_SET_MM:
error = prctl_set_mm(arg2, arg3, arg4, arg5);
break;
case PR_GET_TID_ADDRESS:
error = prctl_get_tid_address(me, (int __user **)arg2);
break;
case PR_SET_CHILD_SUBREAPER:
me->signal->is_child_subreaper = !!arg2;
break;
case PR_GET_CHILD_SUBREAPER:
error = put_user(me->signal->is_child_subreaper,
(int __user *)arg2);
break;
case PR_SET_NO_NEW_PRIVS:
if (arg2 != 1 || arg3 || arg4 || arg5)
return -EINVAL;
task_set_no_new_privs(current);
break;
case PR_GET_NO_NEW_PRIVS:
if (arg2 || arg3 || arg4 || arg5)
return -EINVAL;
return task_no_new_privs(current) ? 1 : 0;
case PR_GET_THP_DISABLE:
if (arg2 || arg3 || arg4 || arg5)
return -EINVAL;
error = !!(me->mm->def_flags & VM_NOHUGEPAGE);
break;
case PR_SET_THP_DISABLE:
if (arg3 || arg4 || arg5)
return -EINVAL;
down_write(&me->mm->mmap_sem);
if (arg2)
me->mm->def_flags |= VM_NOHUGEPAGE;
else
me->mm->def_flags &= ~VM_NOHUGEPAGE;
up_write(&me->mm->mmap_sem);
break;
case PR_MPX_ENABLE_MANAGEMENT:
if (arg2 || arg3 || arg4 || arg5)
return -EINVAL;
error = MPX_ENABLE_MANAGEMENT();
break;
case PR_MPX_DISABLE_MANAGEMENT:
if (arg2 || arg3 || arg4 || arg5)
return -EINVAL;
error = MPX_DISABLE_MANAGEMENT();
break;
case PR_SET_FP_MODE:
error = SET_FP_MODE(me, arg2);
break;
case PR_GET_FP_MODE:
error = GET_FP_MODE(me);
break;
default:
error = -EINVAL;
break;
}
return error;
}
SYSCALL_DEFINE3(getcpu, unsigned __user *, cpup, unsigned __user *, nodep,
struct getcpu_cache __user *, unused)
{
int err = 0;
int cpu = raw_smp_processor_id();
if (cpup)
err |= put_user(cpu, cpup);
if (nodep)
err |= put_user(cpu_to_node(cpu), nodep);
return err ? -EFAULT : 0;
}
/**
* do_sysinfo - fill in sysinfo struct
* @info: pointer to buffer to fill
*/
static int do_sysinfo(struct sysinfo *info)
{
unsigned long mem_total, sav_total;
unsigned int mem_unit, bitcount;
struct timespec tp;
memset(info, 0, sizeof(struct sysinfo));
get_monotonic_boottime(&tp);
info->uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
get_avenrun(info->loads, 0, SI_LOAD_SHIFT - FSHIFT);
info->procs = nr_threads;
si_meminfo(info);
si_swapinfo(info);
/*
* If the sum of all the available memory (i.e. ram + swap)
* is less than can be stored in a 32 bit unsigned long then
* we can be binary compatible with 2.2.x kernels. If not,
* well, in that case 2.2.x was broken anyways...
*
* -Erik Andersen <[email protected]>
*/
mem_total = info->totalram + info->totalswap;
if (mem_total < info->totalram || mem_total < info->totalswap)
goto out;
bitcount = 0;
mem_unit = info->mem_unit;
while (mem_unit > 1) {
bitcount++;
mem_unit >>= 1;
sav_total = mem_total;
mem_total <<= 1;
if (mem_total < sav_total)
goto out;
}
/*
* If mem_total did not overflow, multiply all memory values by
* info->mem_unit and set it to 1. This leaves things compatible
* with 2.2.x, and also retains compatibility with earlier 2.4.x
* kernels...
*/
info->mem_unit = 1;
info->totalram <<= bitcount;
info->freeram <<= bitcount;
info->sharedram <<= bitcount;
info->bufferram <<= bitcount;
info->totalswap <<= bitcount;
info->freeswap <<= bitcount;
info->totalhigh <<= bitcount;
info->freehigh <<= bitcount;
out:
return 0;
}
SYSCALL_DEFINE1(sysinfo, struct sysinfo __user *, info)
{
struct sysinfo val;
do_sysinfo(&val);
if (copy_to_user(info, &val, sizeof(struct sysinfo)))
return -EFAULT;
return 0;
}
#ifdef CONFIG_COMPAT
struct compat_sysinfo {
s32 uptime;
u32 loads[3];
u32 totalram;
u32 freeram;
u32 sharedram;
u32 bufferram;
u32 totalswap;
u32 freeswap;
u16 procs;
u16 pad;
u32 totalhigh;
u32 freehigh;
u32 mem_unit;
char _f[20-2*sizeof(u32)-sizeof(int)];
};
COMPAT_SYSCALL_DEFINE1(sysinfo, struct compat_sysinfo __user *, info)
{
struct sysinfo s;
do_sysinfo(&s);
/* Check to see if any memory value is too large for 32-bit and scale
* down if needed
*/
if (upper_32_bits(s.totalram) || upper_32_bits(s.totalswap)) {
int bitcount = 0;
while (s.mem_unit < PAGE_SIZE) {
s.mem_unit <<= 1;
bitcount++;
}
s.totalram >>= bitcount;
s.freeram >>= bitcount;
s.sharedram >>= bitcount;
s.bufferram >>= bitcount;
s.totalswap >>= bitcount;
s.freeswap >>= bitcount;
s.totalhigh >>= bitcount;
s.freehigh >>= bitcount;
}
if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
__put_user(s.uptime, &info->uptime) ||
__put_user(s.loads[0], &info->loads[0]) ||
__put_user(s.loads[1], &info->loads[1]) ||
__put_user(s.loads[2], &info->loads[2]) ||
__put_user(s.totalram, &info->totalram) ||
__put_user(s.freeram, &info->freeram) ||
__put_user(s.sharedram, &info->sharedram) ||
__put_user(s.bufferram, &info->bufferram) ||
__put_user(s.totalswap, &info->totalswap) ||
__put_user(s.freeswap, &info->freeswap) ||
__put_user(s.procs, &info->procs) ||
__put_user(s.totalhigh, &info->totalhigh) ||
__put_user(s.freehigh, &info->freehigh) ||
__put_user(s.mem_unit, &info->mem_unit))
return -EFAULT;
return 0;
}
#endif /* CONFIG_COMPAT */
|
111093.c | /*
* X.509 certificate writing
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
/*
* References:
* - certificates: RFC 5280, updated by RFC 6818
* - CSRs: PKCS#10 v1.7 aka RFC 2986
* - attributes: PKCS#9 v2.0 aka RFC 2985
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_X509_CRT_WRITE_C)
#include "x509_crt.h"
#include "oid.h"
#include "asn1write.h"
#include "sha1.h"
#include <string.h>
#if defined(MBEDTLS_PEM_WRITE_C)
#include "pem.h"
#endif /* MBEDTLS_PEM_WRITE_C */
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
void mbedtls_x509write_crt_init( mbedtls_x509write_cert *ctx )
{
memset( ctx, 0, sizeof(mbedtls_x509write_cert) );
mbedtls_mpi_init( &ctx->serial );
ctx->version = MBEDTLS_X509_CRT_VERSION_3;
}
void mbedtls_x509write_crt_free( mbedtls_x509write_cert *ctx )
{
mbedtls_mpi_free( &ctx->serial );
mbedtls_asn1_free_named_data_list( &ctx->subject );
mbedtls_asn1_free_named_data_list( &ctx->issuer );
mbedtls_asn1_free_named_data_list( &ctx->extensions );
mbedtls_zeroize( ctx, sizeof(mbedtls_x509write_cert) );
}
void mbedtls_x509write_crt_set_version( mbedtls_x509write_cert *ctx, int version )
{
ctx->version = version;
}
void mbedtls_x509write_crt_set_md_alg( mbedtls_x509write_cert *ctx, mbedtls_md_type_t md_alg )
{
ctx->md_alg = md_alg;
}
void mbedtls_x509write_crt_set_subject_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key )
{
ctx->subject_key = key;
}
void mbedtls_x509write_crt_set_issuer_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key )
{
ctx->issuer_key = key;
}
int mbedtls_x509write_crt_set_subject_name( mbedtls_x509write_cert *ctx,
const char *subject_name )
{
return mbedtls_x509_string_to_names( &ctx->subject, subject_name );
}
int mbedtls_x509write_crt_set_issuer_name( mbedtls_x509write_cert *ctx,
const char *issuer_name )
{
return mbedtls_x509_string_to_names( &ctx->issuer, issuer_name );
}
int mbedtls_x509write_crt_set_serial( mbedtls_x509write_cert *ctx, const mbedtls_mpi *serial )
{
int ret;
if( ( ret = mbedtls_mpi_copy( &ctx->serial, serial ) ) != 0 )
return( ret );
return( 0 );
}
int mbedtls_x509write_crt_set_validity( mbedtls_x509write_cert *ctx, const char *not_before,
const char *not_after )
{
if( strlen( not_before ) != MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1 ||
strlen( not_after ) != MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1 )
{
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
}
strncpy( ctx->not_before, not_before, MBEDTLS_X509_RFC5280_UTC_TIME_LEN );
strncpy( ctx->not_after , not_after , MBEDTLS_X509_RFC5280_UTC_TIME_LEN );
ctx->not_before[MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1] = 'Z';
ctx->not_after[MBEDTLS_X509_RFC5280_UTC_TIME_LEN - 1] = 'Z';
return( 0 );
}
int mbedtls_x509write_crt_set_extension( mbedtls_x509write_cert *ctx,
const char *oid, size_t oid_len,
int critical,
const unsigned char *val, size_t val_len )
{
return mbedtls_x509_set_extension( &ctx->extensions, oid, oid_len,
critical, val, val_len );
}
int mbedtls_x509write_crt_set_basic_constraints( mbedtls_x509write_cert *ctx,
int is_ca, int max_pathlen )
{
int ret;
unsigned char buf[9];
unsigned char *c = buf + sizeof(buf);
size_t len = 0;
memset( buf, 0, sizeof(buf) );
if( is_ca && max_pathlen > 127 )
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
if( is_ca )
{
if( max_pathlen >= 0 )
{
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, max_pathlen ) );
}
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( &c, buf, 1 ) );
}
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_BASIC_CONSTRAINTS,
MBEDTLS_OID_SIZE( MBEDTLS_OID_BASIC_CONSTRAINTS ),
0, buf + sizeof(buf) - len, len );
}
#if defined(MBEDTLS_SHA1_C)
int mbedtls_x509write_crt_set_subject_key_identifier( mbedtls_x509write_cert *ctx )
{
int ret;
unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
unsigned char *c = buf + sizeof(buf);
size_t len = 0;
memset( buf, 0, sizeof(buf) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, ctx->subject_key ) );
mbedtls_sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
c = buf + sizeof(buf) - 20;
len = 20;
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_OCTET_STRING ) );
return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER,
MBEDTLS_OID_SIZE( MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER ),
0, buf + sizeof(buf) - len, len );
}
int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx )
{
int ret;
unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
unsigned char *c = buf + sizeof(buf);
size_t len = 0;
memset( buf, 0, sizeof(buf) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, ctx->issuer_key ) );
mbedtls_sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
c = buf + sizeof(buf) - 20;
len = 20;
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC | 0 ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
return mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER,
MBEDTLS_OID_SIZE( MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER ),
0, buf + sizeof(buf) - len, len );
}
#endif /* MBEDTLS_SHA1_C */
int mbedtls_x509write_crt_set_key_usage( mbedtls_x509write_cert *ctx,
unsigned int key_usage )
{
unsigned char buf[4], ku;
unsigned char *c;
int ret;
/* We currently only support 7 bits, from 0x80 to 0x02 */
if( ( key_usage & ~0xfe ) != 0 )
return( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE );
c = buf + 4;
ku = (unsigned char) key_usage;
if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ku, 7 ) ) != 4 )
return( ret );
ret = mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_KEY_USAGE,
MBEDTLS_OID_SIZE( MBEDTLS_OID_KEY_USAGE ),
1, buf, 4 );
if( ret != 0 )
return( ret );
return( 0 );
}
int mbedtls_x509write_crt_set_ns_cert_type( mbedtls_x509write_cert *ctx,
unsigned char ns_cert_type )
{
unsigned char buf[4];
unsigned char *c;
int ret;
c = buf + 4;
if( ( ret = mbedtls_asn1_write_bitstring( &c, buf, &ns_cert_type, 8 ) ) != 4 )
return( ret );
ret = mbedtls_x509write_crt_set_extension( ctx, MBEDTLS_OID_NS_CERT_TYPE,
MBEDTLS_OID_SIZE( MBEDTLS_OID_NS_CERT_TYPE ),
0, buf, 4 );
if( ret != 0 )
return( ret );
return( 0 );
}
static int x509_write_time( unsigned char **p, unsigned char *start,
const char *time, size_t size )
{
int ret;
size_t len = 0;
/*
* write MBEDTLS_ASN1_UTC_TIME if year < 2050 (2 bytes shorter)
*/
if( time[0] == '2' && time[1] == '0' && time [2] < '5' )
{
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
(const unsigned char *) time + 2,
size - 2 ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_UTC_TIME ) );
}
else
{
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
(const unsigned char *) time,
size ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_GENERALIZED_TIME ) );
}
return( (int) len );
}
int mbedtls_x509write_crt_der( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng )
{
int ret;
const char *sig_oid;
size_t sig_oid_len = 0;
unsigned char *c, *c2;
unsigned char hash[64];
unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
unsigned char tmp_buf[2048];
size_t sub_len = 0, pub_len = 0, sig_and_oid_len = 0, sig_len;
size_t len = 0;
mbedtls_pk_type_t pk_alg;
/*
* Prepare data to be signed in tmp_buf
*/
c = tmp_buf + sizeof( tmp_buf );
/* Signature algorithm needed in TBS, and later for actual signature */
pk_alg = mbedtls_pk_get_type( ctx->issuer_key );
if( pk_alg == MBEDTLS_PK_ECKEY )
pk_alg = MBEDTLS_PK_ECDSA;
if( ( ret = mbedtls_oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg,
&sig_oid, &sig_oid_len ) ) != 0 )
{
return( ret );
}
/*
* Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension
*/
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_extensions( &c, tmp_buf, ctx->extensions ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC |
MBEDTLS_ASN1_CONSTRUCTED | 3 ) );
/*
* SubjectPublicKeyInfo
*/
MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_pk_write_pubkey_der( ctx->subject_key,
tmp_buf, c - tmp_buf ) );
c -= pub_len;
len += pub_len;
/*
* Subject ::= Name
*/
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->subject ) );
/*
* Validity ::= SEQUENCE {
* notBefore Time,
* notAfter Time }
*/
sub_len = 0;
MBEDTLS_ASN1_CHK_ADD( sub_len, x509_write_time( &c, tmp_buf, ctx->not_after,
MBEDTLS_X509_RFC5280_UTC_TIME_LEN ) );
MBEDTLS_ASN1_CHK_ADD( sub_len, x509_write_time( &c, tmp_buf, ctx->not_before,
MBEDTLS_X509_RFC5280_UTC_TIME_LEN ) );
len += sub_len;
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, sub_len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
/*
* Issuer ::= Name
*/
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_x509_write_names( &c, tmp_buf, ctx->issuer ) );
/*
* Signature ::= AlgorithmIdentifier
*/
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( &c, tmp_buf,
sig_oid, strlen( sig_oid ), 0 ) );
/*
* Serial ::= INTEGER
*/
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, tmp_buf, &ctx->serial ) );
/*
* Version ::= INTEGER { v1(0), v2(1), v3(2) }
*/
sub_len = 0;
MBEDTLS_ASN1_CHK_ADD( sub_len, mbedtls_asn1_write_int( &c, tmp_buf, ctx->version ) );
len += sub_len;
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, sub_len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC |
MBEDTLS_ASN1_CONSTRUCTED | 0 ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, tmp_buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, tmp_buf, MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
/*
* Make signature
*/
mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
if( ( ret = mbedtls_pk_sign( ctx->issuer_key, ctx->md_alg, hash, 0, sig, &sig_len,
f_rng, p_rng ) ) != 0 )
{
return( ret );
}
/*
* Write data to output buffer
*/
c2 = buf + size;
MBEDTLS_ASN1_CHK_ADD( sig_and_oid_len, mbedtls_x509_write_sig( &c2, buf,
sig_oid, sig_oid_len, sig, sig_len ) );
c2 -= len;
memcpy( c2, c, len );
len += sig_and_oid_len;
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c2, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c2, buf, MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
return( (int) len );
}
#define PEM_BEGIN_CRT "-----BEGIN CERTIFICATE-----\n"
#define PEM_END_CRT "-----END CERTIFICATE-----\n"
#if defined(MBEDTLS_PEM_WRITE_C)
int mbedtls_x509write_crt_pem( mbedtls_x509write_cert *crt, unsigned char *buf, size_t size,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng )
{
int ret;
unsigned char output_buf[4096];
size_t olen = 0;
if( ( ret = mbedtls_x509write_crt_der( crt, output_buf, sizeof(output_buf),
f_rng, p_rng ) ) < 0 )
{
return( ret );
}
if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_CRT, PEM_END_CRT,
output_buf + sizeof(output_buf) - ret,
ret, buf, size, &olen ) ) != 0 )
{
return( ret );
}
return( 0 );
}
#endif /* MBEDTLS_PEM_WRITE_C */
#endif /* MBEDTLS_X509_CRT_WRITE_C */
|
591437.c | "\n/* \n * Unix SMB/Netbios implementation.\n * Version 1.9.\n * RPC Pipe client / server routine(...TRUNCATED) |
823709.c | "#include \"AST/AstDumper.h\"\n#include \"AST/BinaryOperator.h\"\n#include \"AST/CompoundStatement.h(...TRUNCATED) |
759961.c | "/*\n * This file is part of the MicroPython project, http://micropython.org/\n *\n * The MIT Licens(...TRUNCATED) |
638356.c | "/*\n * Copyright (c) 2004\n *\tBill Paul <[email protected]>. All rights reserved.\n *\n * Redis(...TRUNCATED) |
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