Contents of /tags/mkinitrd-6_1_12/busybox/libbb/create_icmp_socket.c
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Tue Nov 17 21:24:51 2009 UTC (14 years, 10 months ago) by niro
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Tue Nov 17 21:24:51 2009 UTC (14 years, 10 months ago) by niro
File MIME type: text/plain
File size: 776 byte(s)
tagged 'mkinitrd-6_1_12'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routines. |
4 | * |
5 | * create raw socket for icmp protocol |
6 | * and drop root privileges if running setuid |
7 | */ |
8 | |
9 | #include "libbb.h" |
10 | |
11 | int FAST_FUNC create_icmp_socket(void) |
12 | { |
13 | int sock; |
14 | #if 0 |
15 | struct protoent *proto; |
16 | proto = getprotobyname("icmp"); |
17 | /* if getprotobyname failed, just silently force |
18 | * proto->p_proto to have the correct value for "icmp" */ |
19 | sock = socket(AF_INET, SOCK_RAW, |
20 | (proto ? proto->p_proto : 1)); /* 1 == ICMP */ |
21 | #else |
22 | sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */ |
23 | #endif |
24 | if (sock < 0) { |
25 | if (errno == EPERM) |
26 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); |
27 | bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket); |
28 | } |
29 | |
30 | /* drop root privs if running setuid */ |
31 | xsetuid(getuid()); |
32 | |
33 | return sock; |
34 | } |