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copied!<pre><code>int print_socket_info(int sock_fd, struct sockaddr_in *sin, short protocol){ char dbg[INET_ADDRSTRLEN]; char *famstr; inet_ntop(protocol, &(sin->sin_addr), dbg, INET_ADDRSTRLEN); printf("============ SOCKET INFORMATION =============\n"); printf("!** socket: %d\n", sock_fd); printf("!** info->ai_addr: sockaddr_in(\n"); famstr = fam2str(sin->sin_family); printf("!** sin_family: %s\n", famstr); printf("!** sin_port: %d\n", ntohs(sin->sin_port)); printf("!** sin_addr: in_addr( s_addr : '%s' )\n", dbg); printf("!**)\n"); printf("=============================================\n"); return 1; } char *fam2str(int fam){ switch (fam){ case AF_INET: return "AF_INET"; case AF_INET6: return "AF_INET6"; case AF_UNSPEC: return "AF_UNSPEC"; default: return "(UNKNOWN)"; } return "(UNKNOWN)"; } </code></pre> <p>If I pass in hint.ai_addr (ignore the info->...that's part of a string) like so:</p> <pre><code>print_socket_info(sock, (struct sockaddr_in *)hint.ai_addr, protocol); </code></pre> <p>...then I get the following printed out...</p> <pre><code>============ SOCKET INFORMATION ============= !** socket: 3 !** info->ai_addr: sockaddr_in( !** sin_family: AF_INET6 !** sin_port: 8081 !** sin_addr: in_addr( s_addr : '::1' ) !**) ============================================= </code></pre> <p>... information is printed out correctly. Next I call the function:</p> <pre><code>res = getaddrinfo(target_host, target_port, &hint, &info); </code></pre> <p>I get no error so far. Now, I loop through the linked list:</p> <pre><code>struct addrinfo *rp; for (rp = info; rp != NULL; rp = rp->ai_next){ printf("==> Another element.\n"); print_socket_info(sock, (struct sockaddr_in *) rp->ai_addr, protocol); } </code></pre> <p>... I get just one element printed out:</p> <pre><code>============ SOCKET INFORMATION ============= !** socket: 3 !** info->ai_addr: sockaddr_in( !** sin_family: AF_INET6 !** sin_port: 8081 !** sin_addr: in_addr( s_addr : '::' ) !**) ============================================= </code></pre> <p>...which is wreaking havoc with bind(), of course. Why was the address shortened?</p> <p>Something else that's odd: If I pass in 127.0.0.1 and use AF_INET4 then the address is maintained throughout the entire program (I only get one result and bind still fails, though).</p> <p>Any ideas? Thanks in advance.</p>

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