+/* Sockutils.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.
+ */
+/***************************************************************
+ *
+ * File SockUtils.c
+ * Routines for socket operations.
+ *
+ * Define routines for socket handling
+ *
+ * Author: S. Piccardi
+ *
+ * $Id$
+ *
+ ***************************************************************/
+#include <sys/types.h>
+#include <stdio.h> /* standard I/O functions */
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+
+#include "macros.h"
+/**************************************************************************
+ *
+ * Routine ip_ntop
+ *
+ * Return a string with the numeric address translation of the content
+ * of an addrinfo stucture
+ *
+ * Author: Simone Piccardi
+ * Dec. 2004
+ *
+ * $Id$
+ *
+ **************************************************************************/
+char *ip_ntop(struct addrinfo *addr, char *dst, socklen_t cnt)
+{
+// char buffer[INET6_ADDRSTRLEN];
+ char * ret;
+ struct sockaddr_in *ip4;
+ struct sockaddr_in6 *ip6;
+ if (addr->ai_family == PF_INET) {
+ ip4 = (struct sockaddr_in *) addr->ai_addr;
+ ret = inet_ntop(ip4->sin_family, &ip4->sin_addr, dst, cnt);
+ } else {
+ ip6 = (struct sockaddr_in6 *) addr->ai_addr;
+ ret = inet_ntop(ip6->sin6_family, &ip6->sin6_addr, dst, cnt);
+ }
+ return ret;
+}
+/****************************************************************
+ *
+ * Routine sockconn
+ * Return a connected socket given hostname, service, and socket type
+ *
+ * Author: Simone Piccardi
+ * Dec. 2004
+ *
+ * $Id$
+ *
+ ****************************************************************/
+int sockconn(char *host, char *serv, int prot, int type)
+{
+ struct addrinfo hint, *addr, *save;
+ int res;
+ int sock;
+ /* 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 */
+ fprintf(stderr, "sockconn: resolution failed:");
+// fprintf(stderr, "host %s, service %s, protocol %d", host, serv, prot);
+ fprintf(stderr, " %s\n", gai_strerror(res));
+ errno = 0; /* clear errno */
+ return -1;
+ }
+ /* loop on possible addresses */
+ save = addr;
+ while (addr != NULL) {
+ /* 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 {
+ perror("sockconn: cannot create socket");
+ return sock;
+ }
+ }
+ /* connect the socket */
+ if ( (res = connect(sock, addr->ai_addr, addr->ai_addrlen) < 0)) {
+ if (addr->ai_next != NULL) {
+ addr=addr->ai_next;
+ close(sock);
+ continue;
+ } else {
+ perror("sockconn: cannot connect");
+ close(sock);
+ return res;
+ }
+ } else break;
+ }
+ freeaddrinfo(save); /* done, release memory */
+ return sock;
+}
+/****************************************************************
+ *
+ * Routine sockbind
+ * Return a binded socket given hostname, service, and socket type
+ *
+ * Author: Simone Piccardi
+ * Dec. 2004
+ *
+ * $Id$
+ *
+ ****************************************************************/
+int sockbind(char *host, char *serv, int prot, int type)
+{
+ struct addrinfo hint, *addr, *save;
+ int res;
+ int sock;
+ char buf[INET6_ADDRSTRLEN];
+ /* initialize hint structure */
+ memset(&hint, 0, sizeof(struct addrinfo));
+ hint.ai_flags = AI_PASSIVE; /* address for binding */
+ 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 */
+ fprintf(stderr, "sockbind: resolution failed:");
+// fprintf(stderr, "host %s, service %s, protocol %d", host, serv, prot);
+ fprintf(stderr, " %s\n", gai_strerror(res));
+ errno = 0; /* clear errno */
+ return -1;
+ }
+ /* loop on possible addresses */
+ save = addr;
+ while (addr != NULL) {
+ /* 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 {
+ perror("sockconn: cannot create socket");
+ return sock;
+ }
+ }
+ /* connect the socket */
+ printf("Indirizzo %s\n", ip_ntop(addr, buf, sizeof(buf)));
+ ;
+ if ( (res = bind(sock, addr->ai_addr, addr->ai_addrlen)) < 0) {
+ if (addr->ai_next != NULL) {
+ addr=addr->ai_next;
+ close(sock);
+ continue;
+ } else {
+ perror("sockconn: cannot connect");
+ close(sock);
+ return res;
+ }
+ } else break;
+ }
+ freeaddrinfo(save); /* done, release memory */
+ return sock;
+}
projects / gapil.git / commitdiff