diff options
author | Guy Harris <guy@alum.mit.edu> | 2015-03-30 11:21:17 -0700 |
---|---|---|
committer | Guy Harris <guy@alum.mit.edu> | 2015-03-30 19:44:36 +0000 |
commit | 7181ae471345d4e4e85d5edd5341ff7f156de01d (patch) | |
tree | 90606dfc739646b62cef2dcd6f3d55d2b698ca70 /dumpcap.c | |
parent | f341fd930e2b4a7787157bdb1447e00085f0680b (diff) |
Work around a Linux bonding driver bug (and the lack of a libpcap workaround).
The bonding driver does not properly handle unknown ioctls; it returns
ENODEV rather than ENOTSUP, EOPNOTSUPP, ENOTTY, or a "not supported"
error of that type. This causes problems detailed in bug 11058.
On Linux, check for bonding devices before checking for monitor-mode
support.
While we're at it, get rid of a commented-out include of
CheckCSourceCompiles (it's presumably already been implicitly included
by other functions that use it).
Bug: 11058
Change-Id: I13035de0650634c51a52f262829b2b6fb86b39e9
Reviewed-on: https://code.wireshark.org/review/7856
Petri-Dish: Guy Harris <guy@alum.mit.edu>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Diffstat (limited to 'dumpcap.c')
-rw-r--r-- | dumpcap.c | 85 |
1 files changed, 84 insertions, 1 deletions
@@ -63,6 +63,39 @@ #include <sys/utsname.h> #endif +/* + * Linux bonding devices mishandle unknown ioctls; they fail + * with ENODEV rather than ENOTSUP, EOPNOTSUPP, or ENOTTY, + * so pcap_can_set_rfmon() returns a "no such device" indication + * if we try to do SIOCGIWMODE on them. + * + * So, on Linux, we check for bonding devices, if we can, before + * trying pcap_can_set_rfmon(), as pcap_can_set_rfmon() will + * end up trying SIOCGIWMODE on the device if that ioctl exists. + */ +#if defined(HAVE_PCAP_CREATE) && defined(__linux__) + +#include <sys/ioctl.h> + +/* + * If we're building for a Linux version that supports bonding, + * HAVE_BONDING will be defined. + */ + +#ifdef HAVE_LINUX_SOCKIOS_H +#include <linux/sockios.h> +#endif + +#ifdef HAVE_LINUX_IF_BONDING_H +#include <linux/if_bonding.h> +#endif + +#if defined(BOND_INFO_QUERY_OLD) || defined(SIOCBONDINFOQUERY) +#define HAVE_BONDING +#endif + +#endif /* defined(HAVE_PCAP_CREATE) && defined(__linux__) */ + #include <signal.h> #include <errno.h> @@ -1117,6 +1150,44 @@ create_data_link_info(int dlt) return data_link_info; } +#ifdef HAVE_BONDING +gboolean +is_linux_bonding_device(const char *ifname) +{ + int fd; + struct ifreq ifr; + ifbond ifb; + + fd = socket(PF_INET, SOCK_DGRAM, 0); + if (fd == -1) + return FALSE; + + memset(&ifr, 0, sizeof ifr); + g_strlcpy(ifr.ifr_name, ifname, sizeof ifr.ifr_name); + memset(&ifb, 0, sizeof ifb); + ifr.ifr_data = (caddr_t)&ifb; +#if defined(SIOCBONDINFOQUERY) + if (ioctl(fd, SIOCBONDINFOQUERY, &ifr) == 0) { + close(fd); + return TRUE; + } +#else + if (ioctl(fd, BOND_INFO_QUERY_OLD, &ifr) == 0) { + close(fd); + return TRUE; + } +#endif + + return FALSE; +} +#else +static gboolean +is_linux_bonding_device(const char *ifname _U_) +{ + return FALSE; +} +#endif + /* * Get the capabilities of a network device. */ @@ -1177,7 +1248,19 @@ get_if_capabilities(const char *devicename, gboolean monitor_mode g_free(caps); return NULL; } - status = pcap_can_set_rfmon(pch); + if (is_linux_bonding_device(devicename)) { + /* + * Linux bonding device; not Wi-Fi, so no monitor mode, and + * calling pcap_can_set_rfmon() might get a "no such device" + * error. + */ + status = 0; + } else { + /* + * Not a Linux bonding device, so go ahead. + */ + status = pcap_can_set_rfmon(pch); + } if (status < 0) { /* Error. */ if (status == PCAP_ERROR) |