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/* link management code */
/*
* (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2011 by On-Waves
* All Rights Reserved
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <bsc_data.h>
#include <cellmgr_debug.h>
#include <msc_connection.h>
#include <mtp_data.h>
#include <mtp_pcap.h>
#include <snmp_mtp.h>
#include <osmocore/talloc.h>
extern struct bsc_data *bsc;
int is_one_up(struct mtp_link_set *set)
{
struct mtp_link *entry;
llist_for_each_entry(entry, &set->links, entry)
if (entry->available)
return 1;
return 0;
}
void mtp_link_down(struct mtp_link *link)
{
int one_up;
int was_up;
was_up = link->available;
link->available = 0;
link->was_up = 0;
one_up = is_one_up(link->set);
/* our linkset is now unsuable */
if (was_up && !one_up)
mtp_linkset_down(link->set);
link->clear_queue(link);
mtp_link_stop_link_test(link);
mtp_link_set_init_slc(link->set);
}
void mtp_link_up(struct mtp_link *link)
{
int one_up;
if (link->blocked) {
LOGP(DINP, LOGL_ERROR, "Ignoring link up on blocked link %s/%d.\n",
link->set->name, link->link_no);
return;
}
one_up = is_one_up(link->set);
link->available = 1;
link->was_up = 0;
mtp_link_set_init_slc(link->set);
if (!one_up)
mtp_linkset_up(link->set);
else
mtp_link_start_link_test(link);
}
void mtp_link_restart(struct mtp_link *link)
{
LOGP(DINP, LOGL_ERROR, "Need to restart the SS7 link.\n");
link->reset(link);
}
struct mtp_link_set *link_init(struct bsc_data *bsc)
{
int i;
struct mtp_udp_link *lnk;
struct mtp_link_set *set;
set = mtp_link_set_alloc(bsc);
set->name = talloc_strdup(set, "MTP");
set->dpc = bsc->dpc;
set->opc = bsc->opc;
set->sccp_opc = bsc->sccp_opc > -1 ? bsc->sccp_opc : bsc->opc;
set->isup_opc = bsc->isup_opc > -1 ? bsc->isup_opc : bsc->opc;
set->sltm_once = bsc->once;
set->ni = bsc->ni_ni;
set->spare = bsc->ni_spare;
set->pcap_fd = bsc->pcap_fd;
set->supported_ssn[1] = 1;
set->supported_ssn[7] = 1;
set->supported_ssn[8] = 1;
set->supported_ssn[146] = 1;
set->supported_ssn[254] = 1;
if (!bsc->src_port) {
LOGP(DINP, LOGL_ERROR, "You need to set a UDP address.\n");
return NULL;
}
LOGP(DINP, LOGL_NOTICE, "Using UDP MTP mode.\n");
if (link_global_init(&bsc->udp_data, bsc->src_port) != 0)
return NULL;
for (i = 1; i <= bsc->udp_nr_links; ++i) {
lnk = talloc_zero(set, struct mtp_udp_link);
lnk->base.pcap_fd = -1;
lnk->bsc = bsc;
lnk->data = &bsc->udp_data;
lnk->link_index = i;
lnk->reset_timeout = bsc->udp_reset_timeout;
mtp_link_set_add_link(set, (struct mtp_link *) lnk);
/* now connect to the transport */
if (link_udp_init(lnk, bsc->udp_ip, bsc->udp_port) != 0)
return NULL;
}
return set;
}
int link_shutdown_all(struct mtp_link_set *set)
{
struct mtp_link *lnk;
llist_for_each_entry(lnk, &set->links, entry)
lnk->shutdown(lnk);
return 0;
}
int link_reset_all(struct mtp_link_set *set)
{
struct mtp_link *lnk;
llist_for_each_entry(lnk, &set->links, entry)
lnk->reset(lnk);
return 0;
}
int link_clear_all(struct mtp_link_set *set)
{
struct mtp_link *lnk;
llist_for_each_entry(lnk, &set->links, entry)
lnk->clear_queue(lnk);
return 0;
}
int mtp_handle_pcap(struct mtp_link *link, int dir, const uint8_t *data, int len)
{
if (link->pcap_fd >= 0)
mtp_pcap_write_msu(link->pcap_fd, data, len);
if (link->set->pcap_fd >= 0)
mtp_pcap_write_msu(link->set->pcap_fd, data, len);
/* This might be too expensive? */
LOGP(DPCAP, LOGL_NOTICE, "Packet: %s\n", hexdump(data, len));
return 0;
}
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