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/*
* Copyright (c) 2002-2013 Balabit
* Copyright (c) 1998-2013 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 "transport-mapper.h"
#include "gprocess.h"
#include "gsockaddr.h"
#include "gsocket.h"
#include "messages.h"
#include "fdhelpers.h"
#include "transport/transport-socket.h"
#include <errno.h>
#include <unistd.h>
static gboolean
transport_mapper_privileged_bind(gint sock, GSockAddr *bind_addr)
{
cap_t saved_caps;
GIOStatus status;
saved_caps = g_process_cap_save();
g_process_enable_cap("cap_net_bind_service");
g_process_enable_cap("cap_dac_override");
status = g_bind(sock, bind_addr);
g_process_cap_restore(saved_caps);
return status == G_IO_STATUS_NORMAL;
}
gboolean
transport_mapper_open_socket(TransportMapper *self,
SocketOptions *socket_options,
GSockAddr *bind_addr,
GSockAddr *peer_addr,
AFSocketDirection dir,
int *fd)
{
gint sock;
sock = socket(self->address_family, self->sock_type, self->sock_proto);
if (sock < 0)
{
msg_error("Error creating socket",
evt_tag_error(EVT_TAG_OSERROR));
goto error;
}
g_fd_set_nonblock(sock, TRUE);
g_fd_set_cloexec(sock, TRUE);
if (!socket_options_setup_socket(socket_options, sock, peer_addr, dir))
goto error_close;
if (!transport_mapper_privileged_bind(sock, bind_addr))
{
gchar buf[256];
msg_error("Error binding socket",
evt_tag_str("addr", g_sockaddr_format(bind_addr, buf, sizeof(buf), GSA_FULL)),
evt_tag_error(EVT_TAG_OSERROR));
goto error_close;
}
*fd = sock;
return TRUE;
error_close:
close(sock);
error:
*fd = -1;
return FALSE;
}
gboolean
transport_mapper_apply_transport_method(TransportMapper *self, GlobalConfig *cfg)
{
return TRUE;
}
void
transport_mapper_set_transport(TransportMapper *self, const gchar *transport)
{
g_free(self->transport);
self->transport = g_strdup(transport);
}
void
transport_mapper_set_address_family(TransportMapper *self, gint address_family)
{
self->address_family = address_family;
}
void
transport_mapper_free_method(TransportMapper *self)
{
g_free(self->transport);
g_free(self->transport_name);
}
void
transport_mapper_init_instance(TransportMapper *self, const gchar *transport)
{
self->transport = g_strdup(transport);
self->address_family = -1;
self->sock_type = -1;
self->free_fn = transport_mapper_free_method;
self->apply_transport = transport_mapper_apply_transport_method;
}
void
transport_mapper_free(TransportMapper *self)
{
if (self->free_fn)
self->free_fn(self);
g_free(self);
}
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