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The code responsible for opening and rotating pcap files is independent

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of Capser and should use openat(2) unconditionally on FreeBSD.
openat(2) is mandatory when sandboxed with Capsicum, but still works
in the absence of Capsicum.

Reviewed by:	AllanJude
This commit is contained in:
oshogbo 2016-06-08 23:22:59 +00:00
parent ab7650d5cb
commit 12720e106b
1 changed files with 16 additions and 16 deletions
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32
contrib/tcpdump/tcpdump.c
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@ -86,6 +86,7 @@ extern int SIZE_BUF;
#ifdef __FreeBSD__
#include <sys/capsicum.h>
#include <sys/sysctl.h>
#include <libgen.h>
#endif /* __FreeBSD__ */
#ifdef HAVE_CASPER
#include <libcasper.h>
@ -95,7 +96,6 @@ extern int SIZE_BUF;
#include <sys/ioccom.h>
#include <net/bpf.h>
#include <fcntl.h>
#include <libgen.h>
#endif /* HAVE_CASPER */
#include <pcap.h>
#include <signal.h>
@ -484,7 +484,7 @@ struct dump_info {
char *CurrentFileName;
pcap_t *pd;
pcap_dumper_t *p;
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
int dirfd;
#endif
};
@ -967,7 +967,7 @@ tstamp_precision_to_string(int precision)
}
#endif
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
/*
* Ensure that, on a dump file's descriptor, we have all the rights
* necessary to make the standard I/O library work with an fdopen()ed
@ -1067,9 +1067,9 @@ main(int argc, char **argv)
#endif
int status;
FILE *VFile;
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
cap_rights_t rights;
#endif /* HAVE_CASPER */
#endif /* !__FreeBSD__ */
int cansandbox;
#ifdef WIN32
@ -1968,11 +1968,11 @@ main(int argc, char **argv)
#endif /* HAVE_LIBCAP_NG */
if (p == NULL)
error("%s", pcap_geterr(pd));
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
set_dumper_capsicum_rights(p);
#endif
if (Cflag != 0 || Gflag != 0) {
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
dumpinfo.WFileName = strdup(basename(WFileName));
dumpinfo.dirfd = open(dirname(WFileName),
O_DIRECTORY | O_RDONLY);
@ -1990,7 +1990,7 @@ main(int argc, char **argv)
errno != ENOSYS) {
error("unable to limit dump descriptor fcntls");
}
#else /* !HAVE_CASPER */
#else /* !__FreeBSD__ */
dumpinfo.WFileName = WFileName;
#endif
callback = dump_packet_and_trunc;
@ -2325,7 +2325,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
/* If the time is greater than the specified window, rotate */
if (t - Gflag_time >= Gflag) {
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
FILE *fp;
int fd;
#endif
@ -2383,7 +2383,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
capng_apply(CAPNG_SELECT_BOTH);
#endif /* HAVE_LIBCAP_NG */
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
fd = openat(dump_info->dirfd,
dump_info->CurrentFileName,
O_CREAT | O_WRONLY | O_TRUNC, 0644);
@ -2397,7 +2397,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
dump_info->CurrentFileName);
}
dump_info->p = pcap_dump_fopen(dump_info->pd, fp);
#else /* !HAVE_CASPER */
#else /* !__FreeBSD__ */
dump_info->p = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
#endif
#ifdef HAVE_LIBCAP_NG
@ -2406,7 +2406,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
#endif /* HAVE_LIBCAP_NG */
if (dump_info->p == NULL)
error("%s", pcap_geterr(pd));
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
set_dumper_capsicum_rights(dump_info->p);
#endif
}
@ -2423,7 +2423,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
if (size == -1)
error("ftell fails on output file");
if (size > Cflag) {
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
FILE *fp;
int fd;
#endif
@ -2455,7 +2455,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, CAP_DAC_OVERRIDE);
capng_apply(CAPNG_SELECT_BOTH);
#endif /* HAVE_LIBCAP_NG */
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
fd = openat(dump_info->dirfd, dump_info->CurrentFileName,
O_CREAT | O_WRONLY | O_TRUNC, 0644);
if (fd < 0) {
@ -2468,7 +2468,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
dump_info->CurrentFileName);
}
dump_info->p = pcap_dump_fopen(dump_info->pd, fp);
#else /* !HAVE_CASPER */
#else /* !__FreeBSD__ */
dump_info->p = pcap_dump_open(dump_info->pd, dump_info->CurrentFileName);
#endif
#ifdef HAVE_LIBCAP_NG
@ -2477,7 +2477,7 @@ dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *s
#endif /* HAVE_LIBCAP_NG */
if (dump_info->p == NULL)
error("%s", pcap_geterr(pd));
#ifdef HAVE_CASPER
#ifdef __FreeBSD__
set_dumper_capsicum_rights(dump_info->p);
#endif
}