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authorNeels Hofmeyr <neels@hofmeyr.de>2019-04-23 18:37:37 +0200
committerNeels Hofmeyr <neels@hofmeyr.de>2019-04-30 02:24:18 +0200
commitf14aaa4ba1a744d74d431344e23932214bc42a08 (patch)
tree96951088d517116bc00f753a3b869b6d6550111c /src/osmo-bsc/mgw_endpoint_fsm.c
parenta6078fe1d8701d15262e7eb5b3d50d13d1702bbc (diff)
move mgw endpoint FSM to osmo-mgw.git
osmo-mgw.git also includes fixes of the MGW endpoint FSM, for example I92a9944acc96398acd6649f9c3c5badec5dd6dcc. Depends: I9a3effd38e72841529df6c135c077116981dea36 (osmo-mgw) Change-Id: I03e6b48d9b0a5370310d5f56809259ff7909cf9d
Diffstat (limited to 'src/osmo-bsc/mgw_endpoint_fsm.c')
-rw-r--r--src/osmo-bsc/mgw_endpoint_fsm.c795
1 files changed, 0 insertions, 795 deletions
diff --git a/src/osmo-bsc/mgw_endpoint_fsm.c b/src/osmo-bsc/mgw_endpoint_fsm.c
deleted file mode 100644
index fa65166b7..000000000
--- a/src/osmo-bsc/mgw_endpoint_fsm.c
+++ /dev/null
@@ -1,795 +0,0 @@
-/* osmo-bsc API to manage all sides of an MGW endpoint
- *
- * (C) 2018 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
- * All Rights Reserved
- *
- * Author: Neels Hofmeyr <neels@hofmeyr.de>
- *
- * 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 <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-#include <osmocom/core/fsm.h>
-#include <osmocom/core/byteswap.h>
-#include <osmocom/netif/rtp.h>
-
-#include <osmocom/bsc/debug.h>
-
-#include <osmocom/bsc/mgw_endpoint_fsm.h>
-#include <osmocom/bsc/lchan_fsm.h>
-#include <osmocom/bsc/gsm_data.h>
-#include <osmocom/bsc/bsc_msc_data.h>
-
-#define LOG_CI(ci, level, fmt, args...) do { \
- if (!ci || !ci->mgwep) \
- LOGP(DLGLOBAL, level, "(unknown MGW endpoint) " fmt, ## args); \
- else \
- LOG_MGWEP(ci->mgwep, level, "CI[%d] %s%s%s: " fmt, \
- (int)(ci - ci->mgwep->ci), \
- ci->label ? : "-", \
- ci->mgcp_ci_str[0] ? " CI=" : "", \
- ci->mgcp_ci_str[0] ? ci->mgcp_ci_str : "", \
- ## args); \
- } while(0)
-
-#define LOG_CI_VERB(ci, level, fmt, args...) do { \
- if (ci->verb_info.addr) \
- LOG_CI(ci, level, "%s %s:%u: " fmt, \
- mgcp_verb_name(ci->verb), ci->verb_info.addr, ci->verb_info.port, \
- ## args); \
- else \
- LOG_CI(ci, level, "%s: " fmt, \
- mgcp_verb_name(ci->verb), \
- ## args); \
- } while(0)
-
-#define FIRST_CI_EVENT (_MGWEP_EV_LAST + (_MGWEP_EV_LAST & 1)) /* rounded up to even nr */
-#define USABLE_CI ((32 - FIRST_CI_EVENT)/2)
-#define EV_TO_CI_IDX(event) ((event - FIRST_CI_EVENT) / 2)
-
-#define CI_EV_SUCCESS(ci) (FIRST_CI_EVENT + (((ci) - ci->mgwep->ci) * 2))
-#define CI_EV_FAILURE(ci) (CI_EV_SUCCESS(ci) + 1)
-
-static struct osmo_fsm mgwep_fsm;
-
-struct mgwep_ci {
- struct mgw_endpoint *mgwep;
-
- bool occupied;
- char label[64];
- struct osmo_fsm_inst *mgcp_client_fi;
-
- bool pending;
- bool sent;
- enum mgcp_verb verb;
- struct mgcp_conn_peer verb_info;
- struct osmo_fsm_inst *notify;
- uint32_t notify_success;
- uint32_t notify_failure;
- void *notify_data;
-
- bool got_port_info;
- struct mgcp_conn_peer rtp_info;
- char mgcp_ci_str[MGCP_CONN_ID_LENGTH];
-};
-
-struct mgw_endpoint {
- struct mgcp_client *mgcp_client;
- struct osmo_fsm_inst *fi;
- char endpoint[MGCP_ENDPOINT_MAXLEN];
-
- struct mgwep_ci ci[USABLE_CI];
-};
-
-static const struct value_string mgcp_verb_names[] = {
- { MGCP_VERB_CRCX, "CRCX" },
- { MGCP_VERB_MDCX, "MDCX" },
- { MGCP_VERB_DLCX, "DLCX" },
- { MGCP_VERB_AUEP, "AUEP" },
- { MGCP_VERB_RSIP, "RSIP" },
- {}
-};
-
-static inline const char *mgcp_verb_name(enum mgcp_verb val)
-{ return get_value_string(mgcp_verb_names, val); }
-
-static struct mgwep_ci *mgwep_check_ci(struct mgwep_ci *ci)
-{
- if (!ci)
- return NULL;
- if (!ci->mgwep)
- return NULL;
- if (ci < ci->mgwep->ci || ci >= &ci->mgwep->ci[USABLE_CI])
- return NULL;
- return ci;
-}
-
-static struct mgwep_ci *mgwep_ci_for_event(struct mgw_endpoint *mgwep, uint32_t event)
-{
- int idx;
- if (event < FIRST_CI_EVENT)
- return NULL;
- idx = EV_TO_CI_IDX(event);
- if (idx >= sizeof(mgwep->ci))
- return NULL;
- return mgwep_check_ci(&mgwep->ci[idx]);
-}
-
-const char *mgw_endpoint_name(const struct mgw_endpoint *mgwep)
-{
- if (!mgwep)
- return "NULL";
- if (mgwep->endpoint[0])
- return mgwep->endpoint;
- return osmo_fsm_inst_name(mgwep->fi);
-}
-
-const char *mgcp_conn_peer_name(const struct mgcp_conn_peer *info)
-{
- /* I'd be fine with a smaller buffer and accept truncation, but gcc possibly refuses to build if
- * this buffer is too small. */
- static char buf[1024];
-
- if (!info)
- return "NULL";
-
- if (info->endpoint[0]
- && info->addr[0])
- snprintf(buf, sizeof(buf), "%s:%s:%u",
- info->endpoint, info->addr, info->port);
- else if (info->endpoint[0])
- snprintf(buf, sizeof(buf), "%s", info->endpoint);
- else if (info->addr[0])
- snprintf(buf, sizeof(buf), "%s:%u", info->addr, info->port);
- else
- return "empty";
- return buf;
-}
-
-const char *mgwep_ci_name(const struct mgwep_ci *ci)
-{
- const struct mgcp_conn_peer *rtp_info;
-
- if (!ci)
- return "NULL";
-
- rtp_info = mgwep_ci_get_rtp_info(ci);
-
- if (rtp_info)
- return mgcp_conn_peer_name(rtp_info);
- return mgw_endpoint_name(ci->mgwep);
-}
-
-static struct value_string mgwep_fsm_event_names[33] = {};
-
-static char mgwep_fsm_event_name_bufs[32][32] = {};
-
-static void fill_event_names()
-{
- int i;
- for (i = 0; i < (ARRAY_SIZE(mgwep_fsm_event_names) - 1); i++) {
- if (i < _MGWEP_EV_LAST)
- continue;
- if (i < FIRST_CI_EVENT || EV_TO_CI_IDX(i) > USABLE_CI) {
- mgwep_fsm_event_names[i] = (struct value_string){i, "Unused"};
- continue;
- }
- snprintf(mgwep_fsm_event_name_bufs[i], sizeof(mgwep_fsm_event_name_bufs[i]),
- "MGW Response for CI #%d", EV_TO_CI_IDX(i));
- mgwep_fsm_event_names[i] = (struct value_string){i, mgwep_fsm_event_name_bufs[i]};
- }
-}
-
-static struct osmo_tdef *g_T_defs = NULL;
-
-void mgw_endpoint_fsm_init(struct osmo_tdef *T_defs)
-{
- g_T_defs = T_defs;
- OSMO_ASSERT(osmo_fsm_register(&mgwep_fsm) == 0);
- fill_event_names();
-}
-
-struct mgw_endpoint *mgwep_fi_mgwep(struct osmo_fsm_inst *fi)
-{
- OSMO_ASSERT(fi);
- OSMO_ASSERT(fi->fsm == &mgwep_fsm);
- OSMO_ASSERT(fi->priv);
- return fi->priv;
-}
-
-struct mgw_endpoint *mgw_endpoint_alloc(struct osmo_fsm_inst *parent, uint32_t parent_term_event,
- struct mgcp_client *mgcp_client,
- const char *fsm_id,
- const char *endpoint_str_fmt, ...)
-{
- va_list ap;
- struct osmo_fsm_inst *fi;
- struct mgw_endpoint *mgwep;
- int rc;
-
- if (!mgcp_client)
- return NULL;
-
- /* use mgcp_client as talloc ctx, so that the conn, lchan, ts can deallocate while MGCP DLCX are
- * still going on. */
- fi = osmo_fsm_inst_alloc_child(&mgwep_fsm, parent, parent_term_event);
- OSMO_ASSERT(fi);
-
- osmo_fsm_inst_update_id(fi, fsm_id);
-
- mgwep = talloc_zero(fi, struct mgw_endpoint);
- OSMO_ASSERT(mgwep);
-
- mgwep->mgcp_client = mgcp_client;
- mgwep->fi = fi;
- mgwep->fi->priv = mgwep;
-
- va_start(ap, endpoint_str_fmt);
- rc = vsnprintf(mgwep->endpoint, sizeof(mgwep->endpoint), endpoint_str_fmt, ap);
- va_end(ap);
-
- if (rc <= 0 || rc >= sizeof(mgwep->endpoint)) {
- LOG_MGWEP(mgwep, LOGL_ERROR, "Endpoint name too long or too short: %s\n",
- mgwep->endpoint);
- osmo_fsm_inst_term(mgwep->fi, OSMO_FSM_TERM_ERROR, 0);
- return NULL;
- }
-
- return mgwep;
-}
-
-struct mgwep_ci *mgw_endpoint_ci_add(struct mgw_endpoint *mgwep,
- const char *label_fmt, ...)
-{
- va_list ap;
- int i;
- struct mgwep_ci *ci;
-
- for (i = 0; i < USABLE_CI; i++) {
- ci = &mgwep->ci[i];
-
- if (ci->occupied || ci->mgcp_client_fi)
- continue;
-
- *ci = (struct mgwep_ci){
- .mgwep = mgwep,
- .occupied = true,
- };
- if (label_fmt) {
- va_start(ap, label_fmt);
- vsnprintf(ci->label, sizeof(ci->label), label_fmt, ap);
- va_end(ap);
- }
- return ci;
- }
-
- LOG_MGWEP(mgwep, LOGL_ERROR,
- "Cannot allocate another endpoint, all "
- OSMO_STRINGIFY_VAL(USABLE_CI) " are in use\n");
-
- return NULL;
-}
-
-static void mgwep_fsm_check_state_chg_after_response(struct osmo_fsm_inst *fi);
-
-static void on_failure(struct mgwep_ci *ci)
-{
- if (!ci->occupied)
- return;
-
- if (ci->notify)
- osmo_fsm_inst_dispatch(ci->notify, ci->notify_failure, ci->notify_data);
-
- *ci = (struct mgwep_ci){
- .mgwep = ci->mgwep,
- };
-
-
- mgwep_fsm_check_state_chg_after_response(ci->mgwep->fi);
-}
-
-static void on_success(struct mgwep_ci *ci, void *data)
-{
- struct mgcp_conn_peer *rtp_info;
-
- if (!ci->occupied)
- return;
-
- ci->pending = false;
-
- switch (ci->verb) {
- case MGCP_VERB_CRCX:
- /* If we sent a wildcarded endpoint name on CRCX, we need to store the resulting endpoint
- * name here. Also, we receive the MGW's RTP port information. */
- rtp_info = data;
- OSMO_ASSERT(rtp_info);
- ci->got_port_info = true;
- ci->rtp_info = *rtp_info;
- osmo_strlcpy(ci->mgcp_ci_str, mgcp_conn_get_ci(ci->mgcp_client_fi),
- sizeof(ci->mgcp_ci_str));
- if (rtp_info->endpoint[0]) {
- int rc;
- rc = osmo_strlcpy(ci->mgwep->endpoint, rtp_info->endpoint,
- sizeof(ci->mgwep->endpoint));
- if (rc <= 0 || rc >= sizeof(ci->mgwep->endpoint)) {
- LOG_CI(ci, LOGL_ERROR, "Unable to copy endpoint name '%s'\n",
- rtp_info->endpoint);
- mgw_endpoint_ci_dlcx(ci);
- on_failure(ci);
- return;
- }
- }
- break;
-
- default:
- break;
- }
-
- LOG_CI(ci, LOGL_DEBUG, "received successful response to %s RTP=%s%s\n",
- mgcp_verb_name(ci->verb),
- mgcp_conn_peer_name(ci->got_port_info? &ci->rtp_info : NULL),
- ci->notify ? "" : " (not sending a notification)");
-
- if (ci->notify)
- osmo_fsm_inst_dispatch(ci->notify, ci->notify_success, ci->notify_data);
-
- mgwep_fsm_check_state_chg_after_response(ci->mgwep->fi);
-}
-
-const struct mgcp_conn_peer *mgwep_ci_get_rtp_info(const struct mgwep_ci *ci)
-{
- ci = mgwep_check_ci((struct mgwep_ci*)ci);
- if (!ci)
- return NULL;
- if (!ci->got_port_info)
- return NULL;
- return &ci->rtp_info;
-}
-
-bool mgwep_ci_get_crcx_info_to_sockaddr(const struct mgwep_ci *ci, struct sockaddr_storage *dest)
-{
- const struct mgcp_conn_peer *rtp_info;
- struct sockaddr_in *sin;
-
- rtp_info = mgwep_ci_get_rtp_info(ci);
- if (!rtp_info)
- return false;
-
- sin = (struct sockaddr_in *)dest;
-
- sin->sin_family = AF_INET;
- sin->sin_addr.s_addr = inet_addr(rtp_info->addr);
- sin->sin_port = osmo_ntohs(rtp_info->port);
- return true;
-}
-
-
-static const struct osmo_tdef_state_timeout mgwep_fsm_timeouts[32] = {
- [MGWEP_ST_WAIT_MGW_RESPONSE] = { .T=23042 },
-};
-
-/* Transition to a state, using the T timer defined in assignment_fsm_timeouts.
- * The actual timeout value is in turn obtained from g_T_defs.
- * Assumes local variable fi exists. */
-#define mgwep_fsm_state_chg(state) \
- osmo_tdef_fsm_inst_state_chg(fi, state, mgwep_fsm_timeouts, g_T_defs, 5)
-
-void mgw_endpoint_ci_request(struct mgwep_ci *ci,
- enum mgcp_verb verb, const struct mgcp_conn_peer *verb_info,
- struct osmo_fsm_inst *notify,
- uint32_t event_success, uint32_t event_failure,
- void *notify_data)
-{
- struct mgw_endpoint *mgwep;
- struct osmo_fsm_inst *fi;
- struct mgwep_ci cleared_ci;
- ci = mgwep_check_ci(ci);
-
- if (!ci) {
- LOGP(DLGLOBAL, LOGL_ERROR, "Invalid MGW endpoint request: no ci\n");
- goto dispatch_error;
- }
- if (!verb_info && verb != MGCP_VERB_DLCX) {
- LOG_CI(ci, LOGL_ERROR, "Invalid MGW endpoint request: missing verb details for %s\n",
- mgcp_verb_name(verb));
- goto dispatch_error;
- }
- if ((verb < 0) || (verb > MGCP_VERB_RSIP)) {
- LOG_CI(ci, LOGL_ERROR, "Invalid MGW endpoint request: unknown verb: %s\n",
- mgcp_verb_name(verb));
- goto dispatch_error;
- }
-
- mgwep = ci->mgwep;
- fi = mgwep->fi;
-
- /* Clear volatile state by explicitly keeping those that should remain. Because we can't assign
- * the char[] directly, dance through cleared_ci and copy back. */
- cleared_ci = (struct mgwep_ci){
- .mgwep = mgwep,
- .mgcp_client_fi = ci->mgcp_client_fi,
- .got_port_info = ci->got_port_info,
- .rtp_info = ci->rtp_info,
-
- .occupied = true,
- /* .pending = true follows below */
- .verb = verb,
- .notify = notify,
- .notify_success = event_success,
- .notify_failure = event_failure,
- .notify_data = notify_data,
- };
- osmo_strlcpy(cleared_ci.label, ci->label, sizeof(cleared_ci.label));
- osmo_strlcpy(cleared_ci.mgcp_ci_str, ci->mgcp_ci_str, sizeof(cleared_ci.mgcp_ci_str));
- *ci = cleared_ci;
-
- LOG_CI_VERB(ci, LOGL_DEBUG, "notify=%s\n", osmo_fsm_inst_name(ci->notify));
-
- if (verb_info)
- ci->verb_info = *verb_info;
-
- if (mgwep->endpoint[0]) {
- if (ci->verb_info.endpoint[0] && strcmp(ci->verb_info.endpoint, mgwep->endpoint))
- LOG_CI(ci, LOGL_ERROR,
- "Warning: Requested %s on endpoint %s, but this CI is on endpoint %s."
- " Using the proper endpoint instead.\n",
- mgcp_verb_name(verb), ci->verb_info.endpoint, mgwep->endpoint);
- osmo_strlcpy(ci->verb_info.endpoint, mgwep->endpoint, sizeof(ci->verb_info.endpoint));
- }
-
- switch (ci->verb) {
- case MGCP_VERB_CRCX:
- if (ci->mgcp_client_fi) {
- LOG_CI(ci, LOGL_ERROR, "CRCX can be called only once per MGW endpoint CI\n");
- on_failure(ci);
- return;
- }
- break;
-
- case MGCP_VERB_MDCX:
- case MGCP_VERB_DLCX:
- if (!ci->mgcp_client_fi) {
- LOG_CI_VERB(ci, LOGL_ERROR, "The first verb on an unused MGW endpoint CI must be CRCX, not %s\n",
- mgcp_verb_name(ci->verb));
- on_failure(ci);
- return;
- }
- break;
-
- default:
- LOG_CI(ci, LOGL_ERROR, "This verb is not supported: %s\n", mgcp_verb_name(ci->verb));
- on_failure(ci);
- return;
- }
-
- ci->pending = true;
-
- LOG_CI_VERB(ci, LOGL_DEBUG, "Scheduling\n");
-
- if (mgwep->fi->state != MGWEP_ST_WAIT_MGW_RESPONSE)
- mgwep_fsm_state_chg(MGWEP_ST_WAIT_MGW_RESPONSE);
-
- return;
-dispatch_error:
- if (notify)
- osmo_fsm_inst_dispatch(notify, event_failure, notify_data);
-}
-
-static int send_verb(struct mgwep_ci *ci)
-{
- int rc;
- struct mgw_endpoint *mgwep = ci->mgwep;
-
- if (!ci->occupied || !ci->pending || ci->sent)
- return 0;
-
- switch (ci->verb) {
-
- case MGCP_VERB_CRCX:
- OSMO_ASSERT(!ci->mgcp_client_fi);
- LOG_CI_VERB(ci, LOGL_DEBUG, "Sending\n");
- ci->mgcp_client_fi = mgcp_conn_create(mgwep->mgcp_client, mgwep->fi,
- CI_EV_FAILURE(ci), CI_EV_SUCCESS(ci),
- &ci->verb_info);
- ci->sent = true;
- if (!ci->mgcp_client_fi){
- LOG_CI_VERB(ci, LOGL_ERROR, "Cannot send\n");
- on_failure(ci);
- }
- osmo_fsm_inst_update_id(ci->mgcp_client_fi, ci->label);
- break;
-
- case MGCP_VERB_MDCX:
- OSMO_ASSERT(ci->mgcp_client_fi);
- LOG_CI_VERB(ci, LOGL_DEBUG, "Sending\n");
- rc = mgcp_conn_modify(ci->mgcp_client_fi, CI_EV_SUCCESS(ci), &ci->verb_info);
- ci->sent = true;
- if (rc) {
- LOG_CI_VERB(ci, LOGL_ERROR, "Cannot send (rc=%d %s)\n", rc, strerror(-rc));
- on_failure(ci);
- }
- break;
-
- case MGCP_VERB_DLCX:
- LOG_CI(ci, LOGL_DEBUG, "Sending MGCP: %s %s\n",
- mgcp_verb_name(ci->verb), ci->mgcp_ci_str);
- /* The way this is designed, we actually need to forget all about the ci right away. */
- mgcp_conn_delete(ci->mgcp_client_fi);
- if (ci->notify)
- osmo_fsm_inst_dispatch(ci->notify, ci->notify_success, ci->notify_data);
- *ci = (struct mgwep_ci){
- .mgwep = mgwep,
- };
- break;
-
- default:
- OSMO_ASSERT(false);
- }
-
- return 1;
-}
-
-void mgw_endpoint_clear(struct mgw_endpoint *mgwep)
-{
- if (!mgwep)
- return;
- osmo_fsm_inst_term(mgwep->fi, OSMO_FSM_TERM_REGULAR, 0);
-}
-
-static void mgwep_count(struct mgw_endpoint *mgwep, int *occupied, int *pending_not_sent,
- int *waiting_for_response)
-{
- int i;
-
- if (occupied)
- *occupied = 0;
-
- if (pending_not_sent)
- *pending_not_sent = 0;
-
- if (waiting_for_response)
- *waiting_for_response = 0;
-
- for (i = 0; i < ARRAY_SIZE(mgwep->ci); i++) {
- struct mgwep_ci *ci = &mgwep->ci[i];
- if (ci->occupied) {
- if (occupied)
- (*occupied)++;
- } else
- continue;
-
- if (ci->pending)
- LOG_CI_VERB(ci, LOGL_DEBUG, "%s\n",
- ci->sent ? "waiting for response" : "waiting to be sent");
- else
- LOG_CI_VERB(ci, LOGL_DEBUG, "%s\n", mgcp_conn_peer_name(mgwep_ci_get_rtp_info(ci)));
-
- if (ci->pending && ci->sent)
- if (waiting_for_response)
- (*waiting_for_response)++;
- if (ci->pending && !ci->sent)
- if (pending_not_sent)
- (*pending_not_sent)++;
- }
-}
-
-static void mgwep_fsm_check_state_chg_after_response(struct osmo_fsm_inst *fi)
-{
- int waiting_for_response;
- int occupied;
- struct mgw_endpoint *mgwep = mgwep_fi_mgwep(fi);
-
- mgwep_count(mgwep, &occupied, NULL, &waiting_for_response);
- LOG_MGWEP(mgwep, LOGL_DEBUG, "CI in use: %d, waiting for response: %d\n", occupied, waiting_for_response);
-
- if (!occupied) {
- /* All CI have been released. The endpoint no longer exists. Notify the parent FSM, by
- * terminating. */
- osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, 0);
- return;
- }
-
- if (!waiting_for_response) {
- if (fi->state != MGWEP_ST_IN_USE)
- mgwep_fsm_state_chg(MGWEP_ST_IN_USE);
- return;
- }
-
-}
-
-static void mgwep_fsm_wait_mgw_response_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
-{
- int count = 0;
- int i;
- struct mgw_endpoint *mgwep = mgwep_fi_mgwep(fi);
-
- for (i = 0; i < ARRAY_SIZE(mgwep->ci); i++) {
- count += send_verb(&mgwep->ci[i]);
- }
-
- LOG_MGWEP(mgwep, LOGL_DEBUG, "Sent messages: %d\n", count);
- mgwep_fsm_check_state_chg_after_response(fi);
-
-}
-
-static void mgwep_fsm_handle_ci_events(struct osmo_fsm_inst *fi, uint32_t event, void *data)
-{
- struct mgwep_ci *ci;
- struct mgw_endpoint *mgwep = mgwep_fi_mgwep(fi);
- ci = mgwep_ci_for_event(mgwep, event);
- if (ci) {
- if (event == CI_EV_SUCCESS(ci))
- on_success(ci, data);
- else
- on_failure(ci);
- }
-}
-
-static void mgwep_fsm_in_use_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
-{
- int pending_not_sent;
- struct mgw_endpoint *mgwep = mgwep_fi_mgwep(fi);
-
- mgwep_count(mgwep, NULL, &pending_not_sent, NULL);
- if (pending_not_sent)
- mgwep_fsm_state_chg(MGWEP_ST_WAIT_MGW_RESPONSE);
-}
-
-#define S(x) (1 << (x))
-
-static const struct osmo_fsm_state mgwep_fsm_states[] = {
- [MGWEP_ST_UNUSED] = {
- .name = "UNUSED",
- .in_event_mask = 0,
- .out_state_mask = 0
- | S(MGWEP_ST_WAIT_MGW_RESPONSE)
- ,
- },
- [MGWEP_ST_WAIT_MGW_RESPONSE] = {
- .name = "WAIT_MGW_RESPONSE",
- .onenter = mgwep_fsm_wait_mgw_response_onenter,
- .action = mgwep_fsm_handle_ci_events,
- .in_event_mask = 0xffffffff,
- .out_state_mask = 0
- | S(MGWEP_ST_IN_USE)
- ,
- },
- [MGWEP_ST_IN_USE] = {
- .name = "IN_USE",
- .onenter = mgwep_fsm_in_use_onenter,
- .action = mgwep_fsm_handle_ci_events,
- .in_event_mask = 0xffffffff, /* mgcp_client_fsm may send parent term anytime */
- .out_state_mask = 0
- | S(MGWEP_ST_WAIT_MGW_RESPONSE)
- ,
- },
-};
-
-static int mgwep_fsm_timer_cb(struct osmo_fsm_inst *fi)
-{
- int i;
- struct mgw_endpoint *mgwep = mgwep_fi_mgwep(fi);
-
- switch (fi->T) {
- default:
- for (i = 0; i < ARRAY_SIZE(mgwep->ci); i++) {
- struct mgwep_ci *ci = &mgwep->ci[i];
- if (!ci->occupied)
- continue;
- if (!(ci->pending && ci->sent))
- continue;
- on_failure(ci);
- }
- return 0;
- }
-
- return 0;
-}
-
-static struct osmo_fsm mgwep_fsm = {
- .name = "mgw-endpoint",
- .states = mgwep_fsm_states,
- .num_states = ARRAY_SIZE(mgwep_fsm_states),
- .log_subsys = DRSL,
- .event_names = mgwep_fsm_event_names,
- .timer_cb = mgwep_fsm_timer_cb,
- /* The FSM termination will automatically trigger any mgcp_client_fsm instances to DLCX. */
-};
-
-/* Depending on the channel mode and rate, return the codec type that is signalled towards the MGW. */
-enum mgcp_codecs chan_mode_to_mgcp_codec(enum gsm48_chan_mode chan_mode, bool full_rate)
-{
- switch (chan_mode) {
- case GSM48_CMODE_SPEECH_V1:
- if (full_rate)
- return CODEC_GSM_8000_1;
- return CODEC_GSMHR_8000_1;
-
- case GSM48_CMODE_SPEECH_EFR:
- return CODEC_GSMEFR_8000_1;
-
- case GSM48_CMODE_SPEECH_AMR:
- return CODEC_AMR_8000_1;
-
- default:
- return -1;
- }
-}
-
-int chan_mode_to_mgcp_bss_pt(enum mgcp_codecs codec)
-{
- switch (codec) {
- case CODEC_GSMHR_8000_1:
- return RTP_PT_GSM_HALF;
-
- case CODEC_GSMEFR_8000_1:
- return RTP_PT_GSM_EFR;
-
- case CODEC_AMR_8000_1:
- return RTP_PT_AMR;
-
- default:
- /* Not an error, we just leave it to libosmo-mgcp-client to
- * decide over the PT. */
- return -1;
- }
-}
-
-void mgcp_pick_codec(struct mgcp_conn_peer *verb_info, const struct gsm_lchan *lchan, bool bss_side)
-{
- enum mgcp_codecs codec = chan_mode_to_mgcp_codec(lchan->tch_mode,
- lchan->type == GSM_LCHAN_TCH_H? false : true);
- int custom_pt;
-
- if (codec < 0) {
- LOG_LCHAN(lchan, LOGL_ERROR,
- "Unable to determine MGCP codec type for %s in chan-mode %s\n",
- gsm_lchant_name(lchan->type), gsm48_chan_mode_name(lchan->tch_mode));
- verb_info->codecs_len = 0;
- return;
- }
-
- verb_info->codecs[0] = codec;
- verb_info->codecs_len = 1;
-
- /* Setup custom payload types (only for BSS side and when required) */
- custom_pt = chan_mode_to_mgcp_bss_pt(codec);
- if (bss_side && custom_pt > 0) {
- verb_info->ptmap[0].codec = codec;
- verb_info->ptmap[0].pt = custom_pt;
- verb_info->ptmap_len = 1;
- }
-
- /* AMR requires additional parameters to be set up (framing mode) */
- if (verb_info->codecs[0] == CODEC_AMR_8000_1) {
- verb_info->param_present = true;
- verb_info->param.amr_octet_aligned_present = true;
- }
-
- if (bss_side && verb_info->codecs[0] == CODEC_AMR_8000_1) {
- /* FIXME: At the moment all BTSs we support are using the
- * octet-aligned payload format. However, in the future
- * we may support BTSs that are using bandwith-efficient
- * format. In this case we will have to add functionality
- * that distinguishes by the BTS model which mode to use. */
- verb_info->param.amr_octet_aligned = true;
- }
- else if (!bss_side && verb_info->codecs[0] == CODEC_AMR_8000_1) {
- verb_info->param.amr_octet_aligned = lchan->conn->sccp.msc->amr_octet_aligned;
- }
-}