netresolv/net/getaddrinfo.c

47  *   when globbing NULL hostname (to loopback, or wildcard).  Is it the right
51  *   (1) what should we do against numeric hostname (2) what should we do
52  *   against NULL hostname (3) what is AI_ADDRCONFIG itself.  AF not ready?
295 	"Address family for hostname not supported",	/* EAI_ADDRFAMILY */
301 	"No address associated with hostname",		/* EAI_NODATA	  */
302 	"hostname or servname not provided or not known", /* EAI_NONAME	  */
451 getaddrinfo(const char *hostname, const char *servname,
465 	/* hostname is allowed to be NULL */
484 	if (hostname == NULL && servname == NULL)
556 	/* NULL hostname, or numeric hostname */
581 		if (hostname == NULL)
585 			error = explore_numeric_scope(pai, hostname, servname,
605 	if (hostname == NULL)
611 	 * hostname as alphabetical name.
643 		error = explore_fqdn(pai, hostname, servname, &cur->ai_next,
1172  * FQDN hostname, DNS lookup
1175 explore_fqdn(const struct addrinfo *pai, const char *hostname,
1189 	/* hostname may be NULL */
1202 	    default_dns_files, hostname, pai, servname)) {
1235  * hostname == NULL.
1303  * numeric hostname
1306 explore_numeric(const struct addrinfo *pai, const char *hostname,
1317 	/* hostname may be NULL */
1350 		if (inet_aton(hostname, (void *)pton) == 1 &&
1351 		    hostname[strspn(hostname, "0123456789.xabcdefXABCDEF")]
1372 		if (inet_pton(afd->a_af, hostname, pton) == 1) {
1404  * numeric hostname with scope
1407 explore_numeric_scope(const struct addrinfo *pai, const char *hostname,
1411 	return explore_numeric(pai, hostname, servname, res, hostname, svd);
1420 	/* hostname may be NULL */
1435 		return explore_numeric(pai, hostname, servname, res, hostname,
1438 	cp = strchr(hostname, SCOPE_DELIMITER);
1440 		return explore_numeric(pai, hostname, servname, res, hostname,
1446 	hostname2 = strdup(hostname);
1450 	hostname2[cp - hostname] = '\0';
1454 	error = explore_numeric(pai, addr, servname, res, hostname, svd);