1 int sockbind(char *host, char *serv, int prot, int type)
3 struct addrinfo hint, *addr, *save;
6 char buf[INET6_ADDRSTRLEN];
7 memset(&hint, 0, sizeof(struct addrinfo));
8 hint.ai_flags = AI_PASSIVE; /* address for binding */
9 hint.ai_family = PF_UNSPEC; /* generic address (IPv4 or IPv6) */
10 hint.ai_protocol = prot; /* protocol */
11 hint.ai_socktype = type; /* socket type */
12 res = getaddrinfo(host, serv, &hint, &addr); /* calling getaddrinfo */
13 if (res != 0) { /* on error exit */
14 fprintf(stderr, "sockbind: resolution failed:");
15 fprintf(stderr, " %s\n", gai_strerror(res));
16 errno = 0; /* clear errno */
19 save = addr; /* saving for freeaddrinfo */
20 while (addr != NULL) { /* loop on possible addresses */
21 sock = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
22 if (sock < 0) { /* on error */
23 if (addr->ai_next != NULL) { /* if other addresses */
24 addr=addr->ai_next; /* take next */
25 continue; /* restart cycle */
26 } else { /* else stop */
27 perror("sockbind: cannot create socket");
31 if ( (res = bind(sock, addr->ai_addr, addr->ai_addrlen)) < 0) {
32 if (addr->ai_next != NULL) { /* if other addresses */
33 addr=addr->ai_next; /* take next */
34 close(sock); /* close socket */
35 continue; /* restart cycle */
36 } else { /* else stop */
37 perror("sockbind: cannot connect");
41 } else break; /* ok, we are binded! */
43 freeaddrinfo(save); /* done, release memory */