diff options
Diffstat (limited to 'libbb/create_icmp_socket.c')
-rw-r--r-- | libbb/create_icmp_socket.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/libbb/create_icmp_socket.c b/libbb/create_icmp_socket.c new file mode 100644 index 0000000..1fa016a --- /dev/null +++ b/libbb/create_icmp_socket.c @@ -0,0 +1,34 @@ +/* vi: set sw=4 ts=4: */ +/* + * Utility routines. + * + * create raw socket for icmp protocol + * and drop root privileges if running setuid + */ + +#include "libbb.h" + +int FAST_FUNC create_icmp_socket(void) +{ + int sock; +#if 0 + struct protoent *proto; + proto = getprotobyname("icmp"); + /* if getprotobyname failed, just silently force + * proto->p_proto to have the correct value for "icmp" */ + sock = socket(AF_INET, SOCK_RAW, + (proto ? proto->p_proto : 1)); /* 1 == ICMP */ +#else + sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */ +#endif + if (sock < 0) { + if (errno == EPERM) + bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); + bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket); + } + + /* drop root privs if running setuid */ + xsetuid(getuid()); + + return sock; +} |