192 lines
4.6 KiB
C
192 lines
4.6 KiB
C
/* 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 <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;
|
|
|
|
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);
|
|
}
|
|
|
|
static void start_rest(void *start)
|
|
{
|
|
struct mtp_link *data;
|
|
bsc.setup = 1;
|
|
|
|
if (msc_init(&bsc, 1) != 0) {
|
|
fprintf(stderr, "Failed to init MSC part.\n");
|
|
exit(3);
|
|
}
|
|
|
|
llist_for_each_entry(data, &bsc.link_set->links, entry)
|
|
data->start(data);
|
|
}
|
|
|
|
int link_init(struct bsc_data *bsc)
|
|
{
|
|
int i;
|
|
struct mtp_udp_link *lnk;
|
|
|
|
bsc->link_set = mtp_link_set_alloc();
|
|
bsc->link_set->dpc = bsc->dpc;
|
|
bsc->link_set->opc = bsc->opc;
|
|
bsc->link_set->sccp_opc = bsc->sccp_opc > -1 ? bsc->sccp_opc : bsc->opc;
|
|
bsc->link_set->isup_opc = bsc->isup_opc > -1 ? bsc->isup_opc : bsc->opc;
|
|
bsc->link_set->sltm_once = bsc->once;
|
|
bsc->link_set->ni = bsc->ni_ni;
|
|
bsc->link_set->spare = bsc->ni_spare;
|
|
bsc->link_set->bsc = bsc;
|
|
bsc->link_set->pcap_fd = bsc->pcap_fd;
|
|
|
|
if (!bsc->src_port) {
|
|
LOGP(DINP, LOGL_ERROR, "You need to set a UDP address.\n");
|
|
return -1;
|
|
}
|
|
|
|
LOGP(DINP, LOGL_NOTICE, "Using UDP MTP mode.\n");
|
|
|
|
if (link_global_init(&bsc->udp_data, bsc->src_port) != 0)
|
|
return -1;
|
|
|
|
|
|
for (i = 1; i <= bsc->udp_nr_links; ++i) {
|
|
lnk = talloc_zero(bsc->link_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(bsc->link_set, (struct mtp_link *) lnk);
|
|
|
|
|
|
/* now connect to the transport */
|
|
if (link_udp_init(lnk, bsc->udp_ip, bsc->udp_port) != 0)
|
|
return -1;
|
|
|
|
/*
|
|
* We will ask the MTP link to be taken down for two
|
|
* timeouts of the BSC to make sure we are missing the
|
|
* SLTM and it begins a reset. Then we will take it up
|
|
* again and do the usual business.
|
|
*/
|
|
snmp_mtp_deactivate(lnk->session,
|
|
lnk->link_index);
|
|
bsc->start_timer.cb = start_rest;
|
|
bsc->start_timer.data = &bsc;
|
|
bsc_schedule_timer(&bsc->start_timer, lnk->reset_timeout, 0);
|
|
LOGP(DMSC, LOGL_NOTICE, "Making sure SLTM will timeout.\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|