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/*
** Copyright (C) 2006 Olivier DEMBOUR
** $Id: socket.c,v 1.18.4.4 2010/02/10 15:29:51 dembour Exp $
**
**
** 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifndef _WIN32
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#endif
#include "dns.h"
#include "server.h"
#include "myerror.h"
#include "debug.h"
#include "socket.h"
/**
* @brief listen on wanted interfaces
* @param[in] conf configuration
**/
int bind_socket(t_conf *conf)
{
int ret;
union sockaddr_u su;
struct addrinfo *res, hints;
socklen_t slen;
memset(&su, 0, sizeof(su));
slen = sizeof(struct sockaddr_in);
if (conf->my_ip)
{
DPRINTF(1, "Listening on %s:%d for domain %s\n", conf->my_ip,
conf->port, conf->my_domain);
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
res = NULL;
if ((ret = getaddrinfo(conf->my_ip, NULL, &hints, &res)) || !res)
{
MYERROR("getaddrinfo: %s\n", gai_strerror(ret));
return (-1);
}
switch (res->ai_family) {
case AF_INET:
memcpy(&su.in.sin_addr,
&((struct sockaddr_in *) res->ai_addr)->sin_addr,
sizeof(struct in_addr));
su.in.sin_port = htons(conf->port);
su.in.sin_family = res->ai_family;
break;
/* Not supported
case AF_INET6:
memcpy(&su.in6.sin6_addr,
&((struct sockaddr_in6 *) res->ai_addr)->sin6_addr,
sizeof(struct in6_addr));
su.in6.sin6_port = htons(conf->port);
su.in6.sin6_family = res->ai_family;
slen = sizeof(struct sockaddr_in6);
break;
*/
default:
freeaddrinfo(res);
return (-1);
}
freeaddrinfo(res);
}
else
{
su.in.sin_family = AF_INET;
su.in.sin_addr.s_addr = INADDR_ANY;
su.in.sin_port = htons(conf->port);
DPRINTF(1, "Listening on 0.0.0.0:%d for domain %s\n", conf->port,
conf->my_domain);
}
if ((conf->sd_udp = socket(su.in.sin_family, SOCK_DGRAM, 0)) < 0)
{
MYERROR("socket error");
return (-1);
}
if (bind(conf->sd_udp, &su.sockaddr, slen) < 0)
{
close(conf->sd_udp);
MYERROR("bind error");
return (-1);
}
return (0);
}
/**
* @brief connect to a resource
* @param[in] name resource to connet to
* @param[in] port port to connect to
* @param[out] socket descriptor
**/
int connect_socket(char *name, uint16_t port, int *sd)
{
int ret;
char *host, *end;
struct sockaddr_storage ss;
struct addrinfo *res, *ptr, hints;
/* strip [] from "[ip]" */
if (*name == '[')
{
end = strchr(name+1, ']');
if (!end || end[1] || (end == name+1))
{
MYERROR("invalid resource's name (missing ']')\n");
return (-1);
}
if (!(host = strdup(name+1)))
{
MYERROR("cannot duplicate hostname\n");
return (-1);
}
host[end-name-1] = 0;
}
else
{
host = name;
}
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
res = NULL;
ret = getaddrinfo(host, NULL, &hints, &res);
if (ret || !res)
{
MYERROR("getaddrinfo: %s (%s)\n", gai_strerror(ret), host);
if (host != name)
free(host);
return (-1);
}
if (host != name)
free(host);
for (ptr=res; ptr; ptr=ptr->ai_next)
{
memset(&ss, 0, sizeof(ss));
switch (ptr->ai_family) {
case AF_INET:
((struct sockaddr_in *) ptr->ai_addr)->sin_port = htons(port);
break;
case AF_INET6:
((struct sockaddr_in6 *) ptr->ai_addr)->sin6_port = htons(port);
break;
default:
return (-1);
}
ss.ss_family = ptr->ai_family;
if ((*sd = socket(ptr->ai_family, SOCK_STREAM, 0)) < 0)
{
MYERROR("socket error");
break;
}
DPRINTF(1, "Connecting to %s port %d\n", name, port);
if (!connect(*sd, ptr->ai_addr, ptr->ai_addrlen)) {
freeaddrinfo(res);
return (0);
}
MYERROR("connect error");
close(*sd);
}
freeaddrinfo(res);
return (-1);
}
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