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/*
* Copyright (c) 2002-2012 Balabit
* Copyright (c) 1998-2012 Balázs Scheidler
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "afinet.h"
#include "messages.h"
#include "gprocess.h"
#include "transport-mapper-inet.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
static gint
afinet_lookup_service_and_proto(const gchar *service, const gchar *proto)
{
gchar *end;
gint port;
/* check if service is numeric */
port = strtol(service, &end, 10);
if ((*end != 0))
{
struct servent *se;
/* service is not numeric, check if it's a service in /etc/services */
se = getservbyname(service, proto);
if (se)
{
port = ntohs(se->s_port);
}
else
{
msg_error("Error finding port number, falling back to default",
evt_tag_printf("service", "%s/%s", proto, service));
return 0;
}
}
return port;
}
static const gchar *
afinet_lookup_proto(gint protocol_number, gint sock_type)
{
struct protoent *ipproto_ent = getprotobynumber(protocol_number);
return ipproto_ent ? ipproto_ent->p_name
: ((sock_type == SOCK_STREAM) ? "tcp" : "udp");
}
guint16
afinet_lookup_service(const TransportMapper *transport_mapper, const gchar *service)
{
const gchar *protocol_name = afinet_lookup_proto(transport_mapper->sock_proto, transport_mapper->sock_type);
return afinet_lookup_service_and_proto(service, protocol_name);
}
gint
afinet_determine_port(const TransportMapper *transport_mapper, const gchar *service_port)
{
gint port = 0;
if (!service_port)
port = transport_mapper_inet_get_server_port(transport_mapper);
else
port = afinet_lookup_service(transport_mapper, service_port);
return port;
}
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