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monitor: Use socket filter also for netlink monitor interface

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This commit is contained in:
Marcel Holtmann 2014-08-13 21:55:06 -07:00
parent 40160a7fd4
commit 0d81689e08
1 changed files with 21 additions and 4 deletions
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25
monitor/nlmon.c
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@ -1859,6 +1859,16 @@ static bool nlmon_receive(struct l_io *io, void *user_data)
return true; return true;
} }
static struct sock_filter mon_filter[] = {
/* skb->dev->type == 824 (ARPHRD_NETLINK) */
{ 0x28, 0, 0, 0xfffff01c }, /* (000) ldh #hatype */
{ 0x15, 0, 1, 0x00000338 }, /* (001) jeq #824 jt 2 jf 3 */
{ 0x06, 0, 0, 0xffffffff }, /* (002) ret #-1 */
{ 0x06, 0, 0, 0x00000000 }, /* (003) ret #0 */
};
static const struct sock_fprog mon_fprog = { .len = 4, .filter = mon_filter };
static struct l_io *open_packet(const char *name) static struct l_io *open_packet(const char *name)
{ {
struct l_io *io; struct l_io *io;
@ -1903,8 +1913,15 @@ static struct l_io *open_packet(const char *name)
return NULL; return NULL;
} }
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER,
&mon_fprog, sizeof(mon_fprog)) < 0) {
perror("Failed to enable monitor filter");
close(fd);
return NULL;
}
if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, &opt, sizeof(opt)) < 0) { if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, &opt, sizeof(opt)) < 0) {
perror("Failed to enable timestamps"); perror("Failed to enable monitor timestamps");
close(fd); close(fd);
return NULL; return NULL;
} }
@ -2045,7 +2062,7 @@ static bool pae_receive(struct l_io *io, void *user_data)
return true; return true;
} }
static struct sock_filter filter[] = { static struct sock_filter pae_filter[] = {
/* skb->protocol == 0x888e (PAE) */ /* skb->protocol == 0x888e (PAE) */
{ 0x28, 0, 0, 0xfffff000 }, /* (000) ldh #proto */ { 0x28, 0, 0, 0xfffff000 }, /* (000) ldh #proto */
{ 0x15, 0, 1, 0x0000888e }, /* (001) jeq #0x888e jt 2 jf 3 */ { 0x15, 0, 1, 0x0000888e }, /* (001) jeq #0x888e jt 2 jf 3 */
@ -2053,7 +2070,7 @@ static struct sock_filter filter[] = {
{ 0x06, 0, 0, 0x00000000 }, /* (003) ret #0 */ { 0x06, 0, 0, 0x00000000 }, /* (003) ret #0 */
}; };
static const struct sock_fprog fprog = { .len = 4, .filter = filter }; static const struct sock_fprog pae_fprog = { .len = 4, .filter = pae_filter };
static struct l_io *open_pae(void) static struct l_io *open_pae(void)
{ {
@ -2068,7 +2085,7 @@ static struct l_io *open_pae(void)
} }
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER,
&fprog, sizeof(fprog)) < 0) { &pae_fprog, sizeof(pae_fprog)) < 0) {
perror("Failed to enable authentication filter"); perror("Failed to enable authentication filter");
close(fd); close(fd);
return NULL; return NULL;