+++ /dev/null
-/* sockconn.c
- *
- * Copyright (C) 2004 Simone Piccardi
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-/****************************************************************
- *
- * Routine sockconn
- * Return a connected socket given hostname, service, and socket type
- *
- * Author: Simone Piccardi
- * Dec. 2004
- *
- * $Id$
- *
- ****************************************************************/
-#include <arpa/inet.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <string.h>
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-
-int sockconn(char *host, char *serv, int prot, int type)
-{
- struct addrinfo hint, *addr, *save;
- int res;
- int sock;
- int err;
- char buffer[INET6_ADDRSTRLEN];
- struct sockaddr_in *ip4;
- struct sockaddr_in6 *ip6;
- /* initialize hint structure */
- memset(&hint, 0, sizeof(struct addrinfo));
- hint.ai_family = PF_UNSPEC; /* generic address (IPv4 or IPv6) */
- hint.ai_protocol = prot; /* protocol */
- hint.ai_socktype = type; /* socket type */
- res = getaddrinfo(host, serv, &hint, &addr); /* calling getaddrinfo */
- if (res != 0) { /* on error exit */
- printf("sockconn cannot resolve host %s, service %s, ", host, serv);
- printf("protocol %d: %s\n", prot, gai_strerror(res));
- errno = 0; /* clear errno */
- return -1;
- }
- /* loop on possible addresses */
- save = addr;
- while (addr != NULL) {
- if (addr->ai_family == PF_INET) {
- ip4 = (struct sockaddr_in *) addr->ai_addr;
- printf("Indirizzo %s\n", inet_ntop(ip4->sin_family, &ip4->sin_addr,
- buffer, sizeof(buffer)));
- } else {
- ip6 = (struct sockaddr_in6 *) addr->ai_addr;
- printf("Indirizzo %s\n", inet_ntop(ip6->sin6_family,
- &ip6->sin6_addr,
- buffer, sizeof(buffer)));
- }
- /* get a socket */
- sock = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
- if (sock < 0) {
- if (addr->ai_next != NULL) {
- addr=addr->ai_next;
- continue;
- } else {
- printf("sockconn cannot create socket\n");
- return sock;
- }
- }
- /* connect the socket */
- res = connect(sock, addr->ai_addr, addr->ai_addrlen);
- if (res < 0) {
- if (addr->ai_next != NULL) {
- close(sock);
- addr=addr->ai_next;
- continue;
- } else {
- err = errno;
- close(sock);
- errno = err;
- printf("sockconn cannot connect socket\n");
- return res;
- }
- } else break;
- }
- freeaddrinfo(save); /* done, release memory */
- return sock;
-}