/* Test binding to another address in the loopback network. */ #include "udp.h" int main(void) { int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if ( fd < 0 ) err(1, "socket"); struct sockaddr_in sin; memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_addr.s_addr = htobe32(0x7f000002); /* 127.0.0.2 */ sin.sin_port = 0; if ( bind(fd, (const struct sockaddr*) &sin, sizeof(sin)) < 0 ) err(1, "bind"); return 0; }