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/* OpenIDA - Outil d'analyse de fichiers binaires
* net.c - fonctions complémentaires liées au réseau
*
* Copyright (C) 2010 Cyrille Bagard
*
* This file is part of OpenIDA.
*
* OpenIDA 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 3 of the License, or
* (at your option) any later version.
*
* OpenIDA 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include "net.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/******************************************************************************
* *
* Paramètres : server = nom ou adresse du serveur à contacter. *
* port = port de connexion. *
* addr = éventuelle remontée d'informations. [OUT] *
* *
* Description : Ouvre une connexion TCP à un serveur quelconque. *
* *
* Retour : Flux ouvert en lecture/écriture ou -1 en cas d'échec. *
* *
* Remarques : - *
* *
******************************************************************************/
int connect_via_tcp(const char *server, const char *port, struct sockaddr_in *addr)
{
int result; /* Bilan à retourner */
struct addrinfo hints; /* Type de connexion souhaitée */
struct addrinfo *infos; /* Informations disponibles */
int ret; /* Bilan d'un appel */
struct addrinfo *iter; /* Boucle de parcours */
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* IPv4 ou IPv6 */
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = 0;
hints.ai_protocol = 0; /* N'importe quel protocole */
ret = getaddrinfo(server, port, &hints, &infos);
if (ret != 0)
{
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(ret));
return -1;
}
for (iter = infos; iter != NULL; iter = iter->ai_next)
{
result = socket(iter->ai_family, iter->ai_socktype, iter->ai_protocol);
if (result == -1) continue;
ret = connect(result, iter->ai_addr, iter->ai_addrlen);
if (ret == 0) break;
perror("connect");
close(result);
}
freeaddrinfo(infos);
if (iter == NULL) return -1;
if (addr != NULL)
{
ret = getpeername(result, (struct sockaddr *)addr,
(socklen_t []){ sizeof(struct sockaddr_in) });
if (ret == -1)
{
perror("getpeername");
close(result);
return -1;
}
}
return result;
}
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