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osmo-bsc/openbsc/src/osmo-bsc/osmo_bsc_ctrl.c

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/* (C) 2011 by Daniel Willmann <daniel@totalueberwachung.de>
* (C) 2011 by Holger Hans Peter Freyther
* (C) 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 Affero General Public License as published by
* the Free Software Foundation; either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <openbsc/control_cmd.h>
#include <openbsc/debug.h>
#include <openbsc/gsm_data.h>
#include <openbsc/osmo_bsc.h>
#include <openbsc/osmo_bsc_rf.h>
#include <openbsc/osmo_msc_data.h>
#include <openbsc/signal.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/signal.h>
#include <osmocom/core/talloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#define TIME_FORMAT_RFC2822 "%a, %d %b %Y %T %z"
void osmo_bsc_send_trap(struct ctrl_cmd *cmd, struct bsc_msc_connection *msc_con)
{
struct ctrl_cmd *trap;
struct ctrl_handle *ctrl;
struct osmo_msc_data *msc_data;
msc_data = (struct osmo_msc_data *) msc_con->write_queue.bfd.data;
ctrl = msc_data->network->ctrl;
trap = ctrl_cmd_trap(cmd);
if (!trap) {
LOGP(DCTRL, LOGL_ERROR, "Failed to create trap.\n");
return;
}
ctrl_cmd_send_to_all(ctrl, trap);
ctrl_cmd_send(&msc_con->write_queue, trap);
talloc_free(trap);
}
CTRL_CMD_DEFINE_RO(msc_connection_status, "msc_connection_status");
static int msc_connection_status = 0;
static int get_msc_connection_status(struct ctrl_cmd *cmd, void *data)
{
if (msc_connection_status)
cmd->reply = "connected";
else
cmd->reply = "disconnected";
return CTRL_CMD_REPLY;
}
static int msc_connection_status_trap_cb(unsigned int subsys, unsigned int signal, void *handler_data, void *signal_data)
{
struct ctrl_cmd *cmd;
struct gsm_network *gsmnet = (struct gsm_network *)handler_data;
if (signal == S_MSC_LOST && msc_connection_status == 1) {
LOGP(DCTRL, LOGL_DEBUG, "MSC connection lost, sending TRAP.\n");
msc_connection_status = 0;
} else if (signal == S_MSC_CONNECTED && msc_connection_status == 0) {
LOGP(DCTRL, LOGL_DEBUG, "MSC connection (re)established, sending TRAP.\n");
msc_connection_status = 1;
} else {
return 0;
}
cmd = ctrl_cmd_create(tall_bsc_ctx, CTRL_TYPE_TRAP);
if (!cmd) {
LOGP(DCTRL, LOGL_ERROR, "Trap creation failed.\n");
return 0;
}
cmd->id = "0";
cmd->variable = "msc_connection_status";
get_msc_connection_status(cmd, NULL);
ctrl_cmd_send_to_all(gsmnet->ctrl, cmd);
talloc_free(cmd);
return 0;
}
CTRL_CMD_DEFINE_RO(bts_connection_status, "bts_connection_status");
static int bts_connection_status = 0;
static int get_bts_connection_status(struct ctrl_cmd *cmd, void *data)
{
if (bts_connection_status)
cmd->reply = "connected";
else
cmd->reply = "disconnected";
return CTRL_CMD_REPLY;
}
static int bts_connection_status_trap_cb(unsigned int subsys, unsigned int signal, void *handler_data, void *signal_data)
{
struct ctrl_cmd *cmd;
struct gsm_network *gsmnet = (struct gsm_network *)handler_data;
struct gsm_bts *bts;
int bts_current_status;
if (signal != S_L_INP_TEI_DN && signal != S_L_INP_TEI_UP) {
return 0;
}
bts_current_status = 0;
/* Check if OML on at least one BTS is up */
llist_for_each_entry(bts, &gsmnet->bts_list, list) {
if (bts->oml_link) {
bts_current_status = 1;
break;
}
}
if (bts_connection_status == 0 && bts_current_status == 1) {
LOGP(DCTRL, LOGL_DEBUG, "BTS connection (re)established, sending TRAP.\n");
} else if (bts_connection_status == 1 && bts_current_status == 0) {
LOGP(DCTRL, LOGL_DEBUG, "No more BTS connected, sending TRAP.\n");
} else {
return 0;
}
cmd = ctrl_cmd_create(tall_bsc_ctx, CTRL_TYPE_TRAP);
if (!cmd) {
LOGP(DCTRL, LOGL_ERROR, "Trap creation failed.\n");
return 0;
}
bts_connection_status = bts_current_status;
cmd->id = "0";
cmd->variable = "bts_connection_status";
get_bts_connection_status(cmd, NULL);
ctrl_cmd_send_to_all(gsmnet->ctrl, cmd);
talloc_free(cmd);
return 0;
}
static int get_bts_loc(struct ctrl_cmd *cmd, void *data);
static void generate_location_state_trap(struct gsm_bts *bts, struct bsc_msc_connection *msc_con)
{
struct ctrl_cmd *cmd;
const char *oper, *admin, *policy;
cmd = ctrl_cmd_create(msc_con, CTRL_TYPE_TRAP);
if (!cmd) {
LOGP(DCTRL, LOGL_ERROR, "Failed to create TRAP command.\n");
return;
}
cmd->id = "0";
cmd->variable = talloc_asprintf(cmd, "bts.%i.location-state", bts->nr);
/* Prepare the location reply */
cmd->node = bts;
get_bts_loc(cmd, NULL);
oper = osmo_bsc_rf_get_opstate_name(osmo_bsc_rf_get_opstate_by_bts(bts));
admin = osmo_bsc_rf_get_adminstate_name(osmo_bsc_rf_get_adminstate_by_bts(bts));
policy = osmo_bsc_rf_get_policy_name(osmo_bsc_rf_get_policy_by_bts(bts));
cmd->reply = talloc_asprintf_append(cmd->reply,
",%s,%s,%s,%d,%d",
oper, admin, policy,
bts->network->country_code,
bts->network->network_code);
osmo_bsc_send_trap(cmd, msc_con);
talloc_free(cmd);
}
void bsc_gen_location_state_trap(struct gsm_bts *bts)
{
struct osmo_msc_data *msc;
llist_for_each_entry(msc, &bts->network->bsc_data->mscs, entry)
generate_location_state_trap(bts, msc->msc_con);
}
static int location_equal(struct bts_location *a, struct bts_location *b)
{
return ((a->tstamp == b->tstamp) && (a->valid == b->valid) && (a->lat == b->lat) &&
(a->lon == b->lon) && (a->height == b->height));
}
static void cleanup_locations(struct llist_head *locations)
{
struct bts_location *myloc, *tmp;
int invalpos = 0, i = 0;
LOGP(DCTRL, LOGL_DEBUG, "Checking position list.\n");
llist_for_each_entry_safe(myloc, tmp, locations, list) {
i++;
if (i > 3) {
LOGP(DCTRL, LOGL_DEBUG, "Deleting old position.\n");
llist_del(&myloc->list);
talloc_free(myloc);
} else if (myloc->valid == BTS_LOC_FIX_INVALID) {
/* Only capture the newest of subsequent invalid positions */
invalpos++;
if (invalpos > 1) {
LOGP(DCTRL, LOGL_DEBUG, "Deleting subsequent invalid position.\n");
invalpos--;
i--;
llist_del(&myloc->list);
talloc_free(myloc);
}
} else {
invalpos = 0;
}
}
LOGP(DCTRL, LOGL_DEBUG, "Found %i positions.\n", i);
}
CTRL_CMD_DEFINE(bts_loc, "location");
static int get_bts_loc(struct ctrl_cmd *cmd, void *data)
{
struct bts_location *curloc;
struct gsm_bts *bts = (struct gsm_bts *) cmd->node;
if (!bts) {
cmd->reply = "bts not found.";
return CTRL_CMD_ERROR;
}
if (llist_empty(&bts->loc_list)) {
cmd->reply = talloc_asprintf(cmd, "0,invalid,0,0,0");
return CTRL_CMD_REPLY;
} else {
curloc = llist_entry(bts->loc_list.next, struct bts_location, list);
}
cmd->reply = talloc_asprintf(cmd, "%lu,%s,%f,%f,%f", curloc->tstamp,
get_value_string(bts_loc_fix_names, curloc->valid), curloc->lat, curloc->lon, curloc->height);
if (!cmd->reply) {
cmd->reply = "OOM";
return CTRL_CMD_ERROR;
}
return CTRL_CMD_REPLY;
}
static int set_bts_loc(struct ctrl_cmd *cmd, void *data)
{
char *saveptr, *lat, *lon, *height, *tstamp, *valid, *tmp;
struct bts_location *curloc, *lastloc;
int ret;
struct gsm_bts *bts = (struct gsm_bts *) cmd->node;
if (!bts) {
cmd->reply = "bts not found.";
return CTRL_CMD_ERROR;
}
tmp = talloc_strdup(cmd, cmd->value);
if (!tmp)
goto oom;
curloc = talloc_zero(tall_bsc_ctx, struct bts_location);
if (!curloc) {
talloc_free(tmp);
goto oom;
}
INIT_LLIST_HEAD(&curloc->list);
tstamp = strtok_r(tmp, ",", &saveptr);
valid = strtok_r(NULL, ",", &saveptr);
lat = strtok_r(NULL, ",", &saveptr);
lon = strtok_r(NULL, ",", &saveptr);
height = strtok_r(NULL, "\0", &saveptr);
curloc->tstamp = atol(tstamp);
curloc->valid = get_string_value(bts_loc_fix_names, valid);
curloc->lat = atof(lat);
curloc->lon = atof(lon);
curloc->height = atof(height);
talloc_free(tmp);
lastloc = llist_entry(bts->loc_list.next, struct bts_location, list);
/* Add location to the end of the list */
llist_add(&curloc->list, &bts->loc_list);
ret = get_bts_loc(cmd, data);
if (!location_equal(curloc, lastloc))
bsc_gen_location_state_trap(bts);
cleanup_locations(&bts->loc_list);
return ret;
oom:
cmd->reply = "OOM";
return CTRL_CMD_ERROR;
}
static int verify_bts_loc(struct ctrl_cmd *cmd, const char *value, void *data)
{
char *saveptr, *latstr, *lonstr, *heightstr, *tstampstr, *validstr, *tmp;
time_t tstamp;
int valid;
double lat, lon, height __attribute__((unused));
tmp = talloc_strdup(cmd, value);
if (!tmp)
return 1;
tstampstr = strtok_r(tmp, ",", &saveptr);
validstr = strtok_r(NULL, ",", &saveptr);
latstr = strtok_r(NULL, ",", &saveptr);
lonstr = strtok_r(NULL, ",", &saveptr);
heightstr = strtok_r(NULL, "\0", &saveptr);
if ((tstampstr == NULL) || (validstr == NULL) || (latstr == NULL) ||
(lonstr == NULL) || (heightstr == NULL))
goto err;
tstamp = atol(tstampstr);
valid = get_string_value(bts_loc_fix_names, validstr);
lat = atof(latstr);
lon = atof(lonstr);
height = atof(heightstr);
talloc_free(tmp);
tmp = NULL;
if (((tstamp == 0) && (valid != BTS_LOC_FIX_INVALID)) || (lat < -90) || (lat > 90) ||
(lon < -180) || (lon > 180) || (valid < 0)) {
goto err;
}
return 0;
err:
talloc_free(tmp);
cmd->reply = talloc_strdup(cmd, "The format is <unixtime>,(invalid|fix2d|fix3d),<lat>,<lon>,<height>");
return 1;
}
CTRL_CMD_DEFINE(bts_timezone, "timezone");
static int get_bts_timezone(struct ctrl_cmd *cmd, void *data)
{
struct gsm_bts *bts = (struct gsm_bts *) cmd->node;
if (!bts) {
cmd->reply = "bts not found.";
return CTRL_CMD_ERROR;
}
if (bts->tz.override)
cmd->reply = talloc_asprintf(cmd, "%d,%d,%d",
bts->tz.hr, bts->tz.mn, bts->tz.dst);
else
cmd->reply = talloc_asprintf(cmd, "off");
if (!cmd->reply) {
cmd->reply = "OOM";
return CTRL_CMD_ERROR;
}
return CTRL_CMD_REPLY;
}
static int set_bts_timezone(struct ctrl_cmd *cmd, void *data)
{
char *saveptr, *hourstr, *minstr, *dststr, *tmp = 0;
int override;
struct gsm_bts *bts = (struct gsm_bts *) cmd->node;
if (!bts) {
cmd->reply = "bts not found.";
return CTRL_CMD_ERROR;
}
tmp = talloc_strdup(cmd, cmd->value);
if (!tmp)
goto oom;
hourstr = strtok_r(tmp, ",", &saveptr);
minstr = strtok_r(NULL, ",", &saveptr);
dststr = strtok_r(NULL, ",", &saveptr);
override = 0;
if (hourstr != NULL)
override = strcasecmp(hourstr, "off") != 0;
bts->tz.override = override;
if (override) {
bts->tz.hr = hourstr ? atol(hourstr) : 0;
bts->tz.mn = minstr ? atol(minstr) : 0;
bts->tz.dst = dststr ? atol(dststr) : 0;
}
talloc_free(tmp);
tmp = NULL;
return get_bts_timezone(cmd, data);
oom:
cmd->reply = "OOM";
return CTRL_CMD_ERROR;
}
static int verify_bts_timezone(struct ctrl_cmd *cmd, const char *value, void *data)
{
char *saveptr, *hourstr, *minstr, *dststr, *tmp;
int override, tz_hours, tz_mins, tz_dst;
tmp = talloc_strdup(cmd, value);
if (!tmp)
return 1;
hourstr = strtok_r(tmp, ",", &saveptr);
minstr = strtok_r(NULL, ",", &saveptr);
dststr = strtok_r(NULL, ",", &saveptr);
if (hourstr == NULL)
goto err;
override = strcasecmp(hourstr, "off") != 0;
if (!override) {
talloc_free(tmp);
return 0;
}
if (minstr == NULL || dststr == NULL)
goto err;
tz_hours = atol(hourstr);
tz_mins = atol(minstr);
tz_dst = atol(dststr);
talloc_free(tmp);
tmp = NULL;
if ((tz_hours < -19) || (tz_hours > 19) ||
(tz_mins < 0) || (tz_mins >= 60) || (tz_mins % 15 != 0) ||
(tz_dst < 0) || (tz_dst > 2))
goto err;
return 0;
err:
talloc_free(tmp);
cmd->reply = talloc_strdup(cmd, "The format is <hours>,<mins>,<dst> or 'off' where -19 <= hours <= 19, mins in {0, 15, 30, 45}, and 0 <= dst <= 2");
return 1;
}
CTRL_CMD_DEFINE_RO(bts_rf_state, "rf_state");
static int get_bts_rf_state(struct ctrl_cmd *cmd, void *data)
{
const char *oper, *admin, *policy;
struct gsm_bts *bts = cmd->node;
if (!bts) {
cmd->reply = "bts not found.";
return CTRL_CMD_ERROR;
}
oper = osmo_bsc_rf_get_opstate_name(osmo_bsc_rf_get_opstate_by_bts(bts));
admin = osmo_bsc_rf_get_adminstate_name(osmo_bsc_rf_get_adminstate_by_bts(bts));
policy = osmo_bsc_rf_get_policy_name(osmo_bsc_rf_get_policy_by_bts(bts));
cmd->reply = talloc_asprintf(cmd, "%s,%s,%s", oper, admin, policy);
if (!cmd->reply) {
cmd->reply = "OOM.";
return CTRL_CMD_ERROR;
}
return CTRL_CMD_REPLY;
}
CTRL_CMD_DEFINE(net_rf_lock, "rf_locked");
static int get_net_rf_lock(struct ctrl_cmd *cmd, void *data)
{
cmd->reply = "get only works for the individual trx properties.";
return CTRL_CMD_ERROR;
}
static int set_net_rf_lock(struct ctrl_cmd *cmd, void *data)
{
int locked = atoi(cmd->value);
struct gsm_network *net = cmd->node;
time_t now = time(NULL);
char now_buf[64];
struct osmo_bsc_rf *rf;
if (!net) {
cmd->reply = "net not found.";
return CTRL_CMD_ERROR;
}
rf = net->bsc_data->rf_ctrl;
if (!rf) {
cmd->reply = "RF Ctrl is not enabled in the BSC Configuration";
return CTRL_CMD_ERROR;
}
talloc_free(rf->last_rf_lock_ctrl_command);
strftime(now_buf, sizeof(now_buf), TIME_FORMAT_RFC2822, gmtime(&now));
rf->last_rf_lock_ctrl_command =
talloc_asprintf(rf, "rf_locked %u (%s)", locked, now_buf);
osmo_bsc_rf_schedule_lock(rf, locked == 1 ? '0' : '1');
cmd->reply = talloc_asprintf(cmd, "%u", locked);
if (!cmd->reply) {
cmd->reply = "OOM.";
return CTRL_CMD_ERROR;
}
return CTRL_CMD_REPLY;
}
static int verify_net_rf_lock(struct ctrl_cmd *cmd, const char *value, void *data)
{
int locked = atoi(cmd->value);
if ((locked != 0) && (locked != 1))
return 1;
return 0;
}
CTRL_CMD_DEFINE(net_notification, "notification");
static int get_net_notification(struct ctrl_cmd *cmd, void *data)
{
cmd->reply = "There is nothing to read";
return CTRL_CMD_ERROR;
}
static int set_net_notification(struct ctrl_cmd *cmd, void *data)
{
struct ctrl_cmd *trap;
struct gsm_network *net;
net = cmd->node;
trap = ctrl_cmd_create(tall_bsc_ctx, CTRL_TYPE_TRAP);
if (!trap) {
LOGP(DCTRL, LOGL_ERROR, "Trap creation failed\n");
goto handled;
}
trap->id = "0";
trap->variable = "notification";
trap->reply = talloc_strdup(trap, cmd->value);
/*
* This should only be sent to local systems. In the future
* we might even ask for systems to register to receive
* the notifications.
*/
ctrl_cmd_send_to_all(net->ctrl, trap);
talloc_free(trap);
handled:
return CTRL_CMD_HANDLED;
}
static int verify_net_notification(struct ctrl_cmd *cmd, const char *value, void *data)
{
return 0;
}
CTRL_CMD_DEFINE(net_inform_msc, "inform-msc-v1");
static int get_net_inform_msc(struct ctrl_cmd *cmd, void *data)
{
cmd->reply = "There is nothing to read";
return CTRL_CMD_ERROR;
}
static int set_net_inform_msc(struct ctrl_cmd *cmd, void *data)
{
struct gsm_network *net;
struct osmo_msc_data *msc;
net = cmd->node;
llist_for_each_entry(msc, &net->bsc_data->mscs, entry) {
struct ctrl_cmd *trap;
trap = ctrl_cmd_create(tall_bsc_ctx, CTRL_TYPE_TRAP);
if (!trap) {
LOGP(DCTRL, LOGL_ERROR, "Trap creation failed\n");
continue;
}
trap->id = "0";
trap->variable = "inform-msc-v1";
trap->reply = talloc_strdup(trap, cmd->value);
ctrl_cmd_send(&msc->msc_con->write_queue, trap);
talloc_free(trap);
}
return CTRL_CMD_HANDLED;
}
static int verify_net_inform_msc(struct ctrl_cmd *cmd, const char *value, void *data)
{
return 0;
}
static int msc_signal_handler(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data)
{
struct msc_signal_data *msc;
struct gsm_network *net;
struct gsm_bts *bts;
if (subsys != SS_MSC)
return 0;
if (signal != S_MSC_AUTHENTICATED)
return 0;
msc = signal_data;
net = msc->data->network;
llist_for_each_entry(bts, &net->bts_list, list)
generate_location_state_trap(bts, msc->data->msc_con);
return 0;
}
int bsc_ctrl_cmds_install(struct gsm_network *net)
{
int rc;
rc = bsc_base_ctrl_cmds_install();
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_BTS, &cmd_bts_rf_state);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_BTS, &cmd_bts_loc);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_BTS, &cmd_bts_timezone);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_net_rf_lock);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_msc_connection_status);
if (rc)
goto end;
rc = osmo_signal_register_handler(SS_MSC, &msc_connection_status_trap_cb, net);
if (rc)
goto end;
rc = osmo_signal_register_handler(SS_MSC, msc_signal_handler, NULL);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_bts_connection_status);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_net_notification);
if (rc)
goto end;
rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_net_inform_msc);
if (rc)
goto end;
rc = osmo_signal_register_handler(SS_L_INPUT, &bts_connection_status_trap_cb, net);
end:
return rc;
}
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