/* vi: set sw=4 ts=4: */ /* * Utility routines. * * create raw socket for icmp (IPv6 version) protocol test permision * and drop root privilegies if running setuid * */ #include <sys/types.h> #include <netdb.h> #include <sys/socket.h> #include <errno.h> #include <unistd.h> #include "libbb.h" #if CONFIG_FEATURE_IPV6 int create_icmp6_socket(void) { struct protoent *proto; int sock; proto = getprotobyname("ipv6-icmp"); /* if getprotobyname failed, just silently force * proto->p_proto to have the correct value for "ipv6-icmp" */ if ((sock = socket(AF_INET6, SOCK_RAW, (proto ? proto->p_proto : IPPROTO_ICMPV6))) < 0) { if (errno == EPERM) error_msg_and_die("permission denied. (are you root?)"); else perror_msg_and_die(can_not_create_raw_socket); } /* drop root privs if running setuid */ setuid(getuid()); return sock; } #endif