| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pjsip-simple/evsub.h> |
| #include <pjsip-simple/evsub_msg.h> |
| #include <pjsip-simple/errno.h> |
| #include <pjsip/sip_errno.h> |
| #include <pjsip/sip_module.h> |
| #include <pjsip/sip_endpoint.h> |
| #include <pjsip/sip_dialog.h> |
| #include <pjsip/sip_auth.h> |
| #include <pjsip/sip_transaction.h> |
| #include <pjsip/sip_event.h> |
| #include <pj/assert.h> |
| #include <pj/guid.h> |
| #include <pj/log.h> |
| #include <pj/os.h> |
| #include <pj/pool.h> |
| #include <pj/string.h> |
| |
| |
| #define THIS_FILE "evsub.c" |
| |
| /* |
| * Global constant |
| */ |
| |
| /* Let's define this enum, so that it'll trigger compilation error |
| * when somebody define the same enum in sip_msg.h |
| */ |
| enum |
| { |
| PJSIP_SUBSCRIBE_METHOD = PJSIP_OTHER_METHOD, |
| PJSIP_NOTIFY_METHOD = PJSIP_OTHER_METHOD |
| }; |
| |
| PJ_DEF_DATA(const pjsip_method) pjsip_subscribe_method = |
| { |
| (pjsip_method_e) PJSIP_SUBSCRIBE_METHOD, |
| { "SUBSCRIBE", 9 } |
| }; |
| |
| PJ_DEF_DATA(const pjsip_method) pjsip_notify_method = |
| { |
| (pjsip_method_e) PJSIP_NOTIFY_METHOD, |
| { "NOTIFY", 6 } |
| }; |
| |
| /** |
| * SUBSCRIBE method constant. |
| */ |
| PJ_DEF(const pjsip_method*) pjsip_get_subscribe_method() |
| { |
| return &pjsip_subscribe_method; |
| } |
| |
| /** |
| * NOTIFY method constant. |
| */ |
| PJ_DEF(const pjsip_method*) pjsip_get_notify_method() |
| { |
| return &pjsip_notify_method; |
| } |
| |
| |
| /* |
| * Static prototypes. |
| */ |
| static void mod_evsub_on_tsx_state(pjsip_transaction*, pjsip_event*); |
| static pj_status_t mod_evsub_unload(void); |
| |
| |
| /* |
| * State names. |
| */ |
| static pj_str_t evsub_state_names[] = |
| { |
| { "NULL", 4}, |
| { "SENT", 4}, |
| { "ACCEPTED", 8}, |
| { "PENDING", 7}, |
| { "ACTIVE", 6}, |
| { "TERMINATED", 10}, |
| { "UNKNOWN", 7} |
| }; |
| |
| /* |
| * Timer constants. |
| */ |
| |
| /* Number of seconds to send SUBSCRIBE before the actual expiration */ |
| #define TIME_UAC_REFRESH PJSIP_EVSUB_TIME_UAC_REFRESH |
| |
| /* Time to wait for the final NOTIFY after sending unsubscription */ |
| #define TIME_UAC_TERMINATE PJSIP_EVSUB_TIME_UAC_TERMINATE |
| |
| /* If client responds NOTIFY with non-2xx final response (such as 401), |
| * wait for this seconds for further NOTIFY, otherwise client will |
| * unsubscribe |
| */ |
| #define TIME_UAC_WAIT_NOTIFY PJSIP_EVSUB_TIME_UAC_WAIT_NOTIFY |
| |
| |
| /* |
| * Timer id |
| */ |
| enum timer_id |
| { |
| /* No timer. */ |
| TIMER_TYPE_NONE, |
| |
| /* Time to refresh client subscription. |
| * The action is to call on_client_refresh() callback. |
| */ |
| TIMER_TYPE_UAC_REFRESH, |
| |
| /* UAS timeout after to subscription refresh. |
| * The action is to call on_server_timeout() callback. |
| */ |
| TIMER_TYPE_UAS_TIMEOUT, |
| |
| /* UAC waiting for final NOTIFY after unsubscribing |
| * The action is to terminate. |
| */ |
| TIMER_TYPE_UAC_TERMINATE, |
| |
| /* UAC waiting for further NOTIFY after sending non-2xx response to |
| * NOTIFY. The action is to unsubscribe. |
| */ |
| TIMER_TYPE_UAC_WAIT_NOTIFY, |
| |
| /* Max nb of timer types. */ |
| TIMER_TYPE_MAX |
| }; |
| |
| static const char *timer_names[] = |
| { |
| "None", |
| "UAC_REFRESH", |
| "UAS_TIMEOUT" |
| "UAC_TERMINATE", |
| "UAC_WAIT_NOTIFY", |
| "INVALID_TIMER" |
| }; |
| |
| /* |
| * Definition of event package. |
| */ |
| struct evpkg |
| { |
| PJ_DECL_LIST_MEMBER(struct evpkg); |
| |
| pj_str_t pkg_name; |
| pjsip_module *pkg_mod; |
| unsigned pkg_expires; |
| pjsip_accept_hdr *pkg_accept; |
| }; |
| |
| |
| /* |
| * Event subscription module (mod-evsub). |
| */ |
| static struct mod_evsub |
| { |
| pjsip_module mod; |
| pj_pool_t *pool; |
| pjsip_endpoint *endpt; |
| struct evpkg pkg_list; |
| pjsip_allow_events_hdr *allow_events_hdr; |
| |
| } mod_evsub = |
| { |
| { |
| NULL, NULL, /* prev, next. */ |
| { "mod-evsub", 9 }, /* Name. */ |
| -1, /* Id */ |
| PJSIP_MOD_PRIORITY_DIALOG_USAGE, /* Priority */ |
| NULL, /* load() */ |
| NULL, /* start() */ |
| NULL, /* stop() */ |
| &mod_evsub_unload, /* unload() */ |
| NULL, /* on_rx_request() */ |
| NULL, /* on_rx_response() */ |
| NULL, /* on_tx_request. */ |
| NULL, /* on_tx_response() */ |
| &mod_evsub_on_tsx_state, /* on_tsx_state() */ |
| } |
| }; |
| |
| |
| /* |
| * Event subscription session. |
| */ |
| struct pjsip_evsub |
| { |
| char obj_name[PJ_MAX_OBJ_NAME]; /**< Name. */ |
| pj_pool_t *pool; /**< Pool. */ |
| pjsip_endpoint *endpt; /**< Endpoint instance. */ |
| pjsip_dialog *dlg; /**< Underlying dialog. */ |
| struct evpkg *pkg; /**< The event package. */ |
| unsigned option; /**< Options. */ |
| pjsip_evsub_user user; /**< Callback. */ |
| pj_bool_t call_cb; /**< Notify callback? */ |
| pjsip_role_e role; /**< UAC=subscriber, UAS=notifier */ |
| pjsip_evsub_state state; /**< Subscription state. */ |
| pj_str_t state_str; /**< String describing the state. */ |
| pjsip_evsub_state dst_state; /**< Pending state to be set. */ |
| pj_str_t dst_state_str;/**< Pending state to be set. */ |
| pj_str_t term_reason; /**< Termination reason. */ |
| pjsip_method method; /**< Method that established subscr.*/ |
| pjsip_event_hdr *event; /**< Event description. */ |
| pjsip_expires_hdr *expires; /**< Expires header */ |
| pjsip_accept_hdr *accept; /**< Local Accept header. */ |
| pjsip_hdr sub_hdr_list; /**< User-defined header. */ |
| |
| pj_time_val refresh_time; /**< Time to refresh. */ |
| pj_timer_entry timer; /**< Internal timer. */ |
| int pending_tsx; /**< Number of pending transactions.*/ |
| pjsip_transaction *pending_sub; /**< Pending UAC SUBSCRIBE tsx. */ |
| |
| void *mod_data[PJSIP_MAX_MODULE]; /**< Module data. */ |
| }; |
| |
| |
| /* |
| * This is the structure that will be "attached" to dialog. |
| * The purpose is to allow multiple subscriptions inside a dialog. |
| */ |
| struct dlgsub |
| { |
| PJ_DECL_LIST_MEMBER(struct dlgsub); |
| pjsip_evsub *sub; |
| }; |
| |
| |
| /* Static vars. */ |
| static const pj_str_t STR_EVENT = { "Event", 5 }; |
| static const pj_str_t STR_EVENT_S = { "Event", 5 }; |
| static const pj_str_t STR_SUB_STATE = { "Subscription-State", 18 }; |
| static const pj_str_t STR_TERMINATED = { "terminated", 10 }; |
| static const pj_str_t STR_ACTIVE = { "active", 6 }; |
| static const pj_str_t STR_PENDING = { "pending", 7 }; |
| static const pj_str_t STR_TIMEOUT = { "timeout", 7}; |
| |
| |
| /* |
| * On unload module. |
| */ |
| static pj_status_t mod_evsub_unload(void) |
| { |
| pjsip_endpt_release_pool(mod_evsub.endpt, mod_evsub.pool); |
| mod_evsub.pool = NULL; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Proto for pjsipsimple_strerror(). |
| * Defined in errno.c |
| */ |
| PJ_DECL(pj_str_t) pjsipsimple_strerror( pj_status_t statcode, |
| char *buf, pj_size_t bufsize ); |
| |
| /* |
| * Init and register module. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_init_module(pjsip_endpoint *endpt) |
| { |
| pj_status_t status; |
| pj_str_t method_tags[] = { |
| { "SUBSCRIBE", 9}, |
| { "NOTIFY", 6} |
| }; |
| |
| status = pj_register_strerror(PJSIP_SIMPLE_ERRNO_START, |
| PJ_ERRNO_SPACE_SIZE, |
| &pjsipsimple_strerror); |
| pj_assert(status == PJ_SUCCESS); |
| |
| PJ_ASSERT_RETURN(endpt != NULL, PJ_EINVAL); |
| PJ_ASSERT_RETURN(mod_evsub.mod.id == -1, PJ_EINVALIDOP); |
| |
| /* Keep endpoint for future reference: */ |
| mod_evsub.endpt = endpt; |
| |
| /* Init event package list: */ |
| pj_list_init(&mod_evsub.pkg_list); |
| |
| /* Create pool: */ |
| mod_evsub.pool = pjsip_endpt_create_pool(endpt, "evsub", 512, 512); |
| if (!mod_evsub.pool) |
| return PJ_ENOMEM; |
| |
| /* Register module: */ |
| status = pjsip_endpt_register_module(endpt, &mod_evsub.mod); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| /* Create Allow-Events header: */ |
| mod_evsub.allow_events_hdr = pjsip_allow_events_hdr_create(mod_evsub.pool); |
| |
| /* Register SIP-event specific headers parser: */ |
| pjsip_evsub_init_parser(); |
| |
| /* Register new methods SUBSCRIBE and NOTIFY in Allow-ed header */ |
| pjsip_endpt_add_capability(endpt, &mod_evsub.mod, PJSIP_H_ALLOW, NULL, |
| 2, method_tags); |
| |
| /* Done. */ |
| return PJ_SUCCESS; |
| |
| on_error: |
| if (mod_evsub.pool) { |
| pjsip_endpt_release_pool(endpt, mod_evsub.pool); |
| mod_evsub.pool = NULL; |
| } |
| mod_evsub.endpt = NULL; |
| return status; |
| } |
| |
| |
| /* |
| * Get the instance of the module. |
| */ |
| PJ_DEF(pjsip_module*) pjsip_evsub_instance(void) |
| { |
| PJ_ASSERT_RETURN(mod_evsub.mod.id != -1, NULL); |
| |
| return &mod_evsub.mod; |
| } |
| |
| |
| /* |
| * Get the event subscription instance in the transaction. |
| */ |
| PJ_DEF(pjsip_evsub*) pjsip_tsx_get_evsub(pjsip_transaction *tsx) |
| { |
| return (pjsip_evsub*) tsx->mod_data[mod_evsub.mod.id]; |
| } |
| |
| |
| /* |
| * Set event subscription's module data. |
| */ |
| PJ_DEF(void) pjsip_evsub_set_mod_data( pjsip_evsub *sub, unsigned mod_id, |
| void *data ) |
| { |
| PJ_ASSERT_ON_FAIL(mod_id < PJSIP_MAX_MODULE, return); |
| sub->mod_data[mod_id] = data; |
| } |
| |
| |
| /* |
| * Get event subscription's module data. |
| */ |
| PJ_DEF(void*) pjsip_evsub_get_mod_data( pjsip_evsub *sub, unsigned mod_id ) |
| { |
| PJ_ASSERT_RETURN(mod_id < PJSIP_MAX_MODULE, NULL); |
| return sub->mod_data[mod_id]; |
| } |
| |
| |
| /* |
| * Find registered event package with matching name. |
| */ |
| static struct evpkg* find_pkg(const pj_str_t *event_name) |
| { |
| struct evpkg *pkg; |
| |
| pkg = mod_evsub.pkg_list.next; |
| while (pkg != &mod_evsub.pkg_list) { |
| |
| if (pj_stricmp(&pkg->pkg_name, event_name) == 0) { |
| return pkg; |
| } |
| |
| pkg = pkg->next; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * Register an event package |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_register_pkg( pjsip_module *pkg_mod, |
| const pj_str_t *event_name, |
| unsigned expires, |
| unsigned accept_cnt, |
| const pj_str_t accept[]) |
| { |
| struct evpkg *pkg; |
| unsigned i; |
| |
| PJ_ASSERT_RETURN(pkg_mod && event_name, PJ_EINVAL); |
| PJ_ASSERT_RETURN(accept_cnt < PJ_ARRAY_SIZE(pkg->pkg_accept->values), |
| PJ_ETOOMANY); |
| |
| /* Make sure evsub module has been initialized */ |
| PJ_ASSERT_RETURN(mod_evsub.mod.id != -1, PJ_EINVALIDOP); |
| |
| /* Make sure no module with the specified name already registered: */ |
| |
| PJ_ASSERT_RETURN(find_pkg(event_name) == NULL, PJSIP_SIMPLE_EPKGEXISTS); |
| |
| |
| /* Create new event package: */ |
| |
| pkg = PJ_POOL_ALLOC_T(mod_evsub.pool, struct evpkg); |
| pkg->pkg_mod = pkg_mod; |
| pkg->pkg_expires = expires; |
| pj_strdup(mod_evsub.pool, &pkg->pkg_name, event_name); |
| |
| pkg->pkg_accept = pjsip_accept_hdr_create(mod_evsub.pool); |
| pkg->pkg_accept->count = accept_cnt; |
| for (i=0; i<accept_cnt; ++i) { |
| pj_strdup(mod_evsub.pool, &pkg->pkg_accept->values[i], &accept[i]); |
| } |
| |
| /* Add to package list: */ |
| |
| pj_list_push_back(&mod_evsub.pkg_list, pkg); |
| |
| /* Add to Allow-Events header: */ |
| |
| if (mod_evsub.allow_events_hdr->count != |
| PJ_ARRAY_SIZE(mod_evsub.allow_events_hdr->values)) |
| { |
| mod_evsub.allow_events_hdr->values[mod_evsub.allow_events_hdr->count] = |
| pkg->pkg_name; |
| ++mod_evsub.allow_events_hdr->count; |
| } |
| |
| /* Add to endpoint's Accept header */ |
| pjsip_endpt_add_capability(mod_evsub.endpt, &mod_evsub.mod, |
| PJSIP_H_ACCEPT, NULL, |
| pkg->pkg_accept->count, |
| pkg->pkg_accept->values); |
| |
| |
| /* Done */ |
| |
| PJ_LOG(5,(THIS_FILE, "Event pkg \"%.*s\" registered by %.*s", |
| (int)event_name->slen, event_name->ptr, |
| (int)pkg_mod->name.slen, pkg_mod->name.ptr)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Retrieve Allow-Events header |
| */ |
| PJ_DEF(const pjsip_hdr*) pjsip_evsub_get_allow_events_hdr(pjsip_module *m) |
| { |
| struct mod_evsub *mod; |
| |
| if (m == NULL) |
| m = pjsip_evsub_instance(); |
| |
| mod = (struct mod_evsub*)m; |
| |
| return (pjsip_hdr*) mod->allow_events_hdr; |
| } |
| |
| |
| /* |
| * Update expiration time. |
| */ |
| static void update_expires( pjsip_evsub *sub, pj_uint32_t interval ) |
| { |
| pj_gettimeofday(&sub->refresh_time); |
| sub->refresh_time.sec += interval; |
| } |
| |
| |
| /* |
| * Schedule timer. |
| */ |
| static void set_timer( pjsip_evsub *sub, int timer_id, |
| pj_int32_t seconds) |
| { |
| if (sub->timer.id != TIMER_TYPE_NONE) { |
| PJ_LOG(5,(sub->obj_name, "%s %s timer", |
| (timer_id==sub->timer.id ? "Updating" : "Cancelling"), |
| timer_names[sub->timer.id])); |
| pjsip_endpt_cancel_timer(sub->endpt, &sub->timer); |
| sub->timer.id = TIMER_TYPE_NONE; |
| } |
| |
| if (timer_id != TIMER_TYPE_NONE) { |
| pj_time_val timeout; |
| |
| PJ_ASSERT_ON_FAIL(seconds > 0, return); |
| PJ_ASSERT_ON_FAIL(timer_id>TIMER_TYPE_NONE && timer_id<TIMER_TYPE_MAX, |
| return); |
| |
| timeout.sec = seconds; |
| timeout.msec = 0; |
| sub->timer.id = timer_id; |
| |
| pjsip_endpt_schedule_timer(sub->endpt, &sub->timer, &timeout); |
| |
| PJ_LOG(5,(sub->obj_name, "Timer %s scheduled in %d seconds", |
| timer_names[sub->timer.id], timeout.sec)); |
| } |
| } |
| |
| |
| /* |
| * Destroy session. |
| */ |
| static void evsub_destroy( pjsip_evsub *sub ) |
| { |
| struct dlgsub *dlgsub_head, *dlgsub; |
| |
| PJ_LOG(4,(sub->obj_name, "Subscription destroyed")); |
| |
| /* Kill timer */ |
| set_timer(sub, TIMER_TYPE_NONE, 0); |
| |
| /* Remove this session from dialog's list of subscription */ |
| dlgsub_head = (struct dlgsub *) sub->dlg->mod_data[mod_evsub.mod.id]; |
| dlgsub = dlgsub_head->next; |
| while (dlgsub != dlgsub_head) { |
| |
| if (dlgsub->sub == sub) { |
| pj_list_erase(dlgsub); |
| break; |
| } |
| |
| dlgsub = dlgsub->next; |
| } |
| |
| /* Decrement dialog's session */ |
| pjsip_dlg_dec_session(sub->dlg, &mod_evsub.mod); |
| } |
| |
| /* |
| * Set subscription session state. |
| */ |
| static void set_state( pjsip_evsub *sub, pjsip_evsub_state state, |
| const pj_str_t *state_str, pjsip_event *event, |
| const pj_str_t *reason) |
| { |
| pjsip_evsub_state prev_state = sub->state; |
| pj_str_t old_state_str = sub->state_str; |
| pjsip_event dummy_event; |
| |
| sub->state = state; |
| |
| if (state_str && state_str->slen) |
| pj_strdup_with_null(sub->pool, &sub->state_str, state_str); |
| else |
| sub->state_str = evsub_state_names[state]; |
| |
| if (reason && sub->term_reason.slen==0) |
| pj_strdup(sub->pool, &sub->term_reason, reason); |
| |
| PJ_LOG(4,(sub->obj_name, |
| "Subscription state changed %.*s --> %.*s", |
| (int)old_state_str.slen, |
| old_state_str.ptr, |
| (int)sub->state_str.slen, |
| sub->state_str.ptr)); |
| pj_log_push_indent(); |
| |
| /* don't call the callback with NULL event, it may crash the app! */ |
| if (!event) { |
| PJSIP_EVENT_INIT_USER(dummy_event, 0, 0, 0, 0); |
| event = &dummy_event; |
| } |
| |
| if (sub->user.on_evsub_state && sub->call_cb) |
| (*sub->user.on_evsub_state)(sub, event); |
| |
| if (state == PJSIP_EVSUB_STATE_TERMINATED && |
| prev_state != PJSIP_EVSUB_STATE_TERMINATED) |
| { |
| if (sub->pending_tsx == 0) { |
| evsub_destroy(sub); |
| } |
| } |
| |
| pj_log_pop_indent(); |
| } |
| |
| |
| /* |
| * Timer callback. |
| */ |
| static void on_timer( pj_timer_heap_t *timer_heap, |
| struct pj_timer_entry *entry) |
| { |
| pjsip_evsub *sub; |
| int timer_id; |
| |
| PJ_UNUSED_ARG(timer_heap); |
| |
| sub = (pjsip_evsub*) entry->user_data; |
| |
| pjsip_dlg_inc_lock(sub->dlg); |
| |
| timer_id = entry->id; |
| entry->id = TIMER_TYPE_NONE; |
| |
| switch (timer_id) { |
| |
| case TIMER_TYPE_UAC_REFRESH: |
| /* Time for UAC to refresh subscription */ |
| if (sub->user.on_client_refresh && sub->call_cb) { |
| (*sub->user.on_client_refresh)(sub); |
| } else { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| PJ_LOG(5,(sub->obj_name, "Refreshing subscription.")); |
| pj_log_push_indent(); |
| status = pjsip_evsub_initiate(sub, NULL, |
| sub->expires->ivalue, |
| &tdata); |
| if (status == PJ_SUCCESS) |
| pjsip_evsub_send_request(sub, tdata); |
| |
| pj_log_pop_indent(); |
| } |
| break; |
| |
| case TIMER_TYPE_UAS_TIMEOUT: |
| /* Refresh from UAC has not been received */ |
| if (sub->user.on_server_timeout && sub->call_cb) { |
| (*sub->user.on_server_timeout)(sub); |
| } else { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| PJ_LOG(5,(sub->obj_name, "Timeout waiting for refresh. " |
| "Sending NOTIFY to terminate.")); |
| pj_log_push_indent(); |
| status = pjsip_evsub_notify( sub, PJSIP_EVSUB_STATE_TERMINATED, |
| NULL, &STR_TIMEOUT, &tdata); |
| if (status == PJ_SUCCESS) |
| pjsip_evsub_send_request(sub, tdata); |
| |
| pj_log_pop_indent(); |
| } |
| break; |
| |
| case TIMER_TYPE_UAC_TERMINATE: |
| { |
| pj_str_t timeout = {"timeout", 7}; |
| |
| PJ_LOG(5,(sub->obj_name, "Timeout waiting for final NOTIFY. " |
| "Terminating..")); |
| pj_log_push_indent(); |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, NULL, NULL, |
| &timeout); |
| pj_log_pop_indent(); |
| } |
| break; |
| |
| case TIMER_TYPE_UAC_WAIT_NOTIFY: |
| { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| PJ_LOG(5,(sub->obj_name, |
| "Timeout waiting for subsequent NOTIFY (we did " |
| "send non-2xx response for previous NOTIFY). " |
| "Unsubscribing..")); |
| pj_log_push_indent(); |
| status = pjsip_evsub_initiate( sub, NULL, 0, &tdata); |
| if (status == PJ_SUCCESS) |
| pjsip_evsub_send_request(sub, tdata); |
| |
| pj_log_pop_indent(); |
| } |
| break; |
| |
| default: |
| pj_assert(!"Invalid timer id"); |
| } |
| |
| pjsip_dlg_dec_lock(sub->dlg); |
| } |
| |
| |
| /* |
| * Create subscription session, used for both client and notifier. |
| */ |
| static pj_status_t evsub_create( pjsip_dialog *dlg, |
| pjsip_role_e role, |
| const pjsip_evsub_user *user_cb, |
| const pj_str_t *event, |
| unsigned option, |
| pjsip_evsub **p_evsub ) |
| { |
| pjsip_evsub *sub; |
| struct evpkg *pkg; |
| struct dlgsub *dlgsub_head, *dlgsub; |
| pj_status_t status; |
| |
| /* Make sure there's package register for the event name: */ |
| |
| pkg = find_pkg(event); |
| if (pkg == NULL) |
| return PJSIP_SIMPLE_ENOPKG; |
| |
| |
| /* Must lock dialog before using pool etc. */ |
| pjsip_dlg_inc_lock(dlg); |
| |
| /* Init attributes: */ |
| |
| sub = PJ_POOL_ZALLOC_T(dlg->pool, struct pjsip_evsub); |
| sub->pool = dlg->pool; |
| sub->endpt = dlg->endpt; |
| sub->dlg = dlg; |
| sub->pkg = pkg; |
| sub->role = role; |
| sub->call_cb = PJ_TRUE; |
| sub->option = option; |
| sub->state = PJSIP_EVSUB_STATE_NULL; |
| sub->state_str = evsub_state_names[sub->state]; |
| sub->expires = pjsip_expires_hdr_create(sub->pool, pkg->pkg_expires); |
| sub->accept = (pjsip_accept_hdr*) |
| pjsip_hdr_clone(sub->pool, pkg->pkg_accept); |
| pj_list_init(&sub->sub_hdr_list); |
| |
| sub->timer.user_data = sub; |
| sub->timer.cb = &on_timer; |
| |
| /* Set name. */ |
| pj_ansi_snprintf(sub->obj_name, PJ_ARRAY_SIZE(sub->obj_name), |
| "evsub%p", sub); |
| |
| |
| /* Copy callback, if any: */ |
| if (user_cb) |
| pj_memcpy(&sub->user, user_cb, sizeof(pjsip_evsub_user)); |
| |
| |
| /* Create Event header: */ |
| sub->event = pjsip_event_hdr_create(sub->pool); |
| pj_strdup(sub->pool, &sub->event->event_type, event); |
| |
| |
| /* Check if another subscription has been registered to the dialog. In |
| * that case, just add ourselves to the subscription list, otherwise |
| * create and register a new subscription list. |
| */ |
| if (pjsip_dlg_has_usage(dlg, &mod_evsub.mod)) { |
| dlgsub_head = (struct dlgsub*) dlg->mod_data[mod_evsub.mod.id]; |
| dlgsub = PJ_POOL_ALLOC_T(sub->pool, struct dlgsub); |
| dlgsub->sub = sub; |
| pj_list_push_back(dlgsub_head, dlgsub); |
| } else { |
| dlgsub_head = PJ_POOL_ALLOC_T(sub->pool, struct dlgsub); |
| dlgsub = PJ_POOL_ALLOC_T(sub->pool, struct dlgsub); |
| dlgsub->sub = sub; |
| |
| pj_list_init(dlgsub_head); |
| pj_list_push_back(dlgsub_head, dlgsub); |
| |
| |
| /* Register as dialog usage: */ |
| |
| status = pjsip_dlg_add_usage(dlg, &mod_evsub.mod, dlgsub_head); |
| if (status != PJ_SUCCESS) { |
| pjsip_dlg_dec_lock(dlg); |
| return status; |
| } |
| } |
| |
| PJ_LOG(5,(sub->obj_name, "%s subscription created, using dialog %s", |
| (role==PJSIP_ROLE_UAC ? "UAC" : "UAS"), |
| dlg->obj_name)); |
| |
| *p_evsub = sub; |
| pjsip_dlg_dec_lock(dlg); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| |
| /* |
| * Create client subscription session. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_create_uac( pjsip_dialog *dlg, |
| const pjsip_evsub_user *user_cb, |
| const pj_str_t *event, |
| unsigned option, |
| pjsip_evsub **p_evsub) |
| { |
| pjsip_evsub *sub; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(dlg && event && p_evsub, PJ_EINVAL); |
| |
| pjsip_dlg_inc_lock(dlg); |
| status = evsub_create(dlg, PJSIP_UAC_ROLE, user_cb, event, option, &sub); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| /* Add unique Id to Event header, only when PJSIP_EVSUB_NO_EVENT_ID |
| * is not specified. |
| */ |
| if ((option & PJSIP_EVSUB_NO_EVENT_ID) == 0) { |
| pj_create_unique_string(sub->pool, &sub->event->id_param); |
| } |
| |
| /* Increment dlg session. */ |
| pjsip_dlg_inc_session(sub->dlg, &mod_evsub.mod); |
| |
| /* Done */ |
| *p_evsub = sub; |
| |
| on_return: |
| pjsip_dlg_dec_lock(dlg); |
| return status; |
| } |
| |
| |
| /* |
| * Create server subscription session from incoming request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_create_uas( pjsip_dialog *dlg, |
| const pjsip_evsub_user *user_cb, |
| pjsip_rx_data *rdata, |
| unsigned option, |
| pjsip_evsub **p_evsub) |
| { |
| pjsip_evsub *sub; |
| pjsip_transaction *tsx; |
| pjsip_accept_hdr *accept_hdr; |
| pjsip_event_hdr *event_hdr; |
| pjsip_expires_hdr *expires_hdr; |
| pj_status_t status; |
| |
| /* Check arguments: */ |
| PJ_ASSERT_RETURN(dlg && rdata && p_evsub, PJ_EINVAL); |
| |
| /* MUST be request message: */ |
| PJ_ASSERT_RETURN(rdata->msg_info.msg->type == PJSIP_REQUEST_MSG, |
| PJSIP_ENOTREQUESTMSG); |
| |
| /* Transaction MUST have been created (in the dialog) */ |
| tsx = pjsip_rdata_get_tsx(rdata); |
| PJ_ASSERT_RETURN(tsx != NULL, PJSIP_ENOTSX); |
| |
| /* No subscription must have been attached to transaction */ |
| PJ_ASSERT_RETURN(tsx->mod_data[mod_evsub.mod.id] == NULL, |
| PJSIP_ETYPEEXISTS); |
| |
| /* Package MUST implement on_rx_refresh */ |
| PJ_ASSERT_RETURN(user_cb->on_rx_refresh, PJ_EINVALIDOP); |
| |
| /* Request MUST have "Event" header. We need the Event header to get |
| * the package name (don't want to add more arguments in the function). |
| */ |
| event_hdr = (pjsip_event_hdr*) |
| pjsip_msg_find_hdr_by_names(rdata->msg_info.msg, &STR_EVENT, |
| &STR_EVENT_S, NULL); |
| if (event_hdr == NULL) { |
| return PJSIP_ERRNO_FROM_SIP_STATUS(PJSIP_SC_BAD_REQUEST); |
| } |
| |
| /* Start locking the mutex: */ |
| |
| pjsip_dlg_inc_lock(dlg); |
| |
| /* Create the session: */ |
| |
| status = evsub_create(dlg, PJSIP_UAS_ROLE, user_cb, |
| &event_hdr->event_type, option, &sub); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| /* Just duplicate Event header from the request */ |
| sub->event = (pjsip_event_hdr*) pjsip_hdr_clone(sub->pool, event_hdr); |
| |
| /* Set the method: */ |
| pjsip_method_copy(sub->pool, &sub->method, |
| &rdata->msg_info.msg->line.req.method); |
| |
| /* Update expiration time according to client request: */ |
| |
| expires_hdr = (pjsip_expires_hdr*) |
| pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_EXPIRES, NULL); |
| if (expires_hdr) { |
| sub->expires->ivalue = expires_hdr->ivalue; |
| } |
| |
| /* Update time. */ |
| update_expires(sub, sub->expires->ivalue); |
| |
| /* Update Accept header: */ |
| |
| accept_hdr = (pjsip_accept_hdr*) |
| pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_ACCEPT, NULL); |
| if (accept_hdr) |
| sub->accept = (pjsip_accept_hdr*)pjsip_hdr_clone(sub->pool,accept_hdr); |
| |
| /* We can start the session: */ |
| |
| pjsip_dlg_inc_session(dlg, &mod_evsub.mod); |
| sub->pending_tsx++; |
| tsx->mod_data[mod_evsub.mod.id] = sub; |
| |
| |
| /* Done. */ |
| *p_evsub = sub; |
| |
| |
| on_return: |
| pjsip_dlg_dec_lock(dlg); |
| return status; |
| } |
| |
| |
| /* |
| * Forcefully destroy subscription. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_terminate( pjsip_evsub *sub, |
| pj_bool_t notify ) |
| { |
| PJ_ASSERT_RETURN(sub, PJ_EINVAL); |
| |
| pjsip_dlg_inc_lock(sub->dlg); |
| |
| /* I think it's pretty safe to disable this check. |
| |
| if (sub->pending_tsx) { |
| pj_assert(!"Unable to terminate when there's pending tsx"); |
| pjsip_dlg_dec_lock(sub->dlg); |
| return PJ_EINVALIDOP; |
| } |
| */ |
| |
| sub->call_cb = notify; |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, NULL, NULL, NULL); |
| |
| pjsip_dlg_dec_lock(sub->dlg); |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Get subscription state. |
| */ |
| PJ_DEF(pjsip_evsub_state) pjsip_evsub_get_state(pjsip_evsub *sub) |
| { |
| return sub->state; |
| } |
| |
| /* |
| * Get state name. |
| */ |
| PJ_DEF(const char*) pjsip_evsub_get_state_name(pjsip_evsub *sub) |
| { |
| return sub->state_str.ptr; |
| } |
| |
| /* |
| * Get termination reason. |
| */ |
| PJ_DEF(const pj_str_t*) pjsip_evsub_get_termination_reason(pjsip_evsub *sub) |
| { |
| return &sub->term_reason; |
| } |
| |
| /* |
| * Initiate client subscription |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_initiate( pjsip_evsub *sub, |
| const pjsip_method *method, |
| pj_int32_t expires, |
| pjsip_tx_data **p_tdata) |
| { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(sub!=NULL && p_tdata!=NULL, PJ_EINVAL); |
| |
| /* Use SUBSCRIBE if method is not specified */ |
| if (method == NULL) |
| method = &pjsip_subscribe_method; |
| |
| pjsip_dlg_inc_lock(sub->dlg); |
| |
| /* Update method: */ |
| if (sub->state == PJSIP_EVSUB_STATE_NULL) |
| pjsip_method_copy(sub->pool, &sub->method, method); |
| |
| status = pjsip_dlg_create_request( sub->dlg, method, -1, &tdata); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| |
| /* Add Event header: */ |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, sub->event)); |
| |
| /* Update and add expires header: */ |
| if (expires >= 0) |
| sub->expires->ivalue = expires; |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, sub->expires)); |
| |
| /* Add Supported header (it's optional in RFC 3265, but some event package |
| * RFC may bring this requirement to SHOULD strength - e.g. RFC 5373) |
| */ |
| { |
| const pjsip_hdr *hdr = pjsip_endpt_get_capability(sub->endpt, |
| PJSIP_H_SUPPORTED, |
| NULL); |
| if (hdr) { |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, hdr)); |
| } |
| } |
| |
| /* Add Accept header: */ |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, sub->accept)); |
| |
| |
| /* Add Allow-Events header: */ |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, |
| mod_evsub.allow_events_hdr)); |
| |
| |
| /* Add custom headers */ |
| { |
| const pjsip_hdr *hdr = sub->sub_hdr_list.next; |
| while (hdr != &sub->sub_hdr_list) { |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, hdr)); |
| hdr = hdr->next; |
| } |
| } |
| |
| |
| *p_tdata = tdata; |
| |
| |
| on_return: |
| |
| pjsip_dlg_dec_lock(sub->dlg); |
| return status; |
| } |
| |
| |
| /* |
| * Add custom headers. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_add_header( pjsip_evsub *sub, |
| const pjsip_hdr *hdr_list ) |
| { |
| const pjsip_hdr *hdr; |
| |
| PJ_ASSERT_RETURN(sub && hdr_list, PJ_EINVAL); |
| |
| hdr = hdr_list->next; |
| while (hdr != hdr_list) { |
| pj_list_push_back(&sub->sub_hdr_list, (pjsip_hdr*) |
| pjsip_hdr_clone(sub->pool, hdr)); |
| hdr = hdr->next; |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Accept incoming subscription request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_accept( pjsip_evsub *sub, |
| pjsip_rx_data *rdata, |
| int st_code, |
| const pjsip_hdr *hdr_list ) |
| { |
| pjsip_tx_data *tdata; |
| pjsip_transaction *tsx; |
| pj_status_t status; |
| |
| /* Check arguments */ |
| PJ_ASSERT_RETURN(sub && rdata, PJ_EINVAL); |
| |
| /* Can only be for server subscription: */ |
| PJ_ASSERT_RETURN(sub->role == PJSIP_ROLE_UAS, PJ_EINVALIDOP); |
| |
| /* Only expect 2xx status code (for now) */ |
| PJ_ASSERT_RETURN(st_code/100 == 2, PJ_EINVALIDOP); |
| |
| /* Subscription MUST have been attached to the transaction. |
| * Initial subscription request will be attached on evsub_create_uas(), |
| * while subsequent requests will be attached in tsx_state() |
| */ |
| tsx = pjsip_rdata_get_tsx(rdata); |
| PJ_ASSERT_RETURN(tsx->mod_data[mod_evsub.mod.id] != NULL, |
| PJ_EINVALIDOP); |
| |
| /* Lock dialog */ |
| pjsip_dlg_inc_lock(sub->dlg); |
| |
| /* Create response: */ |
| status = pjsip_dlg_create_response( sub->dlg, rdata, st_code, NULL, |
| &tdata); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| |
| /* Add expires header: */ |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, sub->expires)); |
| |
| /* Add additional header, if any. */ |
| if (hdr_list) { |
| const pjsip_hdr *hdr = hdr_list->next; |
| while (hdr != hdr_list) { |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_clone(tdata->pool, hdr)); |
| hdr = hdr->next; |
| } |
| } |
| |
| /* Send the response: */ |
| status = pjsip_dlg_send_response( sub->dlg, tsx, tdata ); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| |
| on_return: |
| |
| pjsip_dlg_dec_lock(sub->dlg); |
| return status; |
| } |
| |
| |
| /* |
| * Create Subscription-State header based on current server subscription |
| * state. |
| */ |
| static pjsip_sub_state_hdr* sub_state_create( pj_pool_t *pool, |
| pjsip_evsub *sub, |
| pjsip_evsub_state state, |
| const pj_str_t *state_str, |
| const pj_str_t *reason ) |
| { |
| pjsip_sub_state_hdr *sub_state; |
| pj_time_val now, delay; |
| |
| /* Get the remaining time before refresh is required */ |
| pj_gettimeofday(&now); |
| delay = sub->refresh_time; |
| PJ_TIME_VAL_SUB(delay, now); |
| |
| /* Create the Subscription-State header */ |
| sub_state = pjsip_sub_state_hdr_create(pool); |
| |
| /* Fill up the header */ |
| switch (state) { |
| case PJSIP_EVSUB_STATE_NULL: |
| case PJSIP_EVSUB_STATE_SENT: |
| pj_assert(!"Invalid state!"); |
| /* Treat as pending */ |
| |
| case PJSIP_EVSUB_STATE_ACCEPTED: |
| case PJSIP_EVSUB_STATE_PENDING: |
| sub_state->sub_state = STR_PENDING; |
| sub_state->expires_param = delay.sec; |
| break; |
| |
| case PJSIP_EVSUB_STATE_ACTIVE: |
| sub_state->sub_state = STR_ACTIVE; |
| sub_state->expires_param = delay.sec; |
| break; |
| |
| case PJSIP_EVSUB_STATE_TERMINATED: |
| sub_state->sub_state = STR_TERMINATED; |
| if (reason != NULL) |
| pj_strdup(pool, &sub_state->reason_param, reason); |
| break; |
| |
| case PJSIP_EVSUB_STATE_UNKNOWN: |
| pj_assert(state_str != NULL); |
| pj_strdup(pool, &sub_state->sub_state, state_str); |
| break; |
| } |
| |
| return sub_state; |
| } |
| |
| /* |
| * Create and send NOTIFY request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_notify( pjsip_evsub *sub, |
| pjsip_evsub_state state, |
| const pj_str_t *state_str, |
| const pj_str_t *reason, |
| pjsip_tx_data **p_tdata) |
| { |
| pjsip_tx_data *tdata; |
| pjsip_sub_state_hdr *sub_state; |
| pj_status_t status; |
| |
| /* Check arguments. */ |
| PJ_ASSERT_RETURN(sub!=NULL && p_tdata!=NULL, PJ_EINVAL); |
| |
| /* Lock dialog. */ |
| pjsip_dlg_inc_lock(sub->dlg); |
| |
| /* Create NOTIFY request */ |
| status = pjsip_dlg_create_request( sub->dlg, pjsip_get_notify_method(), |
| -1, &tdata); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| /* Add Event header */ |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, sub->event)); |
| |
| /* Add Subscription-State header */ |
| sub_state = sub_state_create(tdata->pool, sub, state, state_str, |
| reason); |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)sub_state); |
| |
| /* Add Allow-Events header */ |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, mod_evsub.allow_events_hdr)); |
| |
| /* Add Authentication headers. */ |
| pjsip_auth_clt_init_req( &sub->dlg->auth_sess, tdata ); |
| |
| /* Update reason */ |
| if (reason) |
| pj_strdup(sub->dlg->pool, &sub->term_reason, reason); |
| |
| /* Save destination state. */ |
| sub->dst_state = state; |
| if (state_str) |
| pj_strdup(sub->pool, &sub->dst_state_str, state_str); |
| else |
| sub->dst_state_str.slen = 0; |
| |
| |
| *p_tdata = tdata; |
| |
| on_return: |
| /* Unlock dialog */ |
| pjsip_dlg_dec_lock(sub->dlg); |
| return status; |
| } |
| |
| |
| /* |
| * Create NOTIFY to reflect current status. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_current_notify( pjsip_evsub *sub, |
| pjsip_tx_data **p_tdata ) |
| { |
| return pjsip_evsub_notify( sub, sub->state, &sub->state_str, |
| NULL, p_tdata ); |
| } |
| |
| |
| /* |
| * Send request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_evsub_send_request( pjsip_evsub *sub, |
| pjsip_tx_data *tdata) |
| { |
| pj_status_t status; |
| |
| /* Must be request message. */ |
| PJ_ASSERT_RETURN(tdata->msg->type == PJSIP_REQUEST_MSG, |
| PJSIP_ENOTREQUESTMSG); |
| |
| /* Lock */ |
| pjsip_dlg_inc_lock(sub->dlg); |
| |
| /* Send the request. */ |
| status = pjsip_dlg_send_request(sub->dlg, tdata, -1, NULL); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| |
| /* Special case for NOTIFY: |
| * The new state was set in pjsip_evsub_notify(), but we apply the |
| * new state now, when the request was actually sent. |
| */ |
| if (pjsip_method_cmp(&tdata->msg->line.req.method, |
| &pjsip_notify_method)==0) |
| { |
| PJ_ASSERT_ON_FAIL( sub->dst_state!=PJSIP_EVSUB_STATE_NULL, |
| {goto on_return;}); |
| |
| set_state(sub, sub->dst_state, |
| (sub->dst_state_str.slen ? &sub->dst_state_str : NULL), |
| NULL, NULL); |
| |
| sub->dst_state = PJSIP_EVSUB_STATE_NULL; |
| sub->dst_state_str.slen = 0; |
| |
| } |
| |
| |
| on_return: |
| pjsip_dlg_dec_lock(sub->dlg); |
| return status; |
| } |
| |
| |
| /* Callback to be called to terminate transaction. */ |
| static void terminate_timer_cb(pj_timer_heap_t *timer_heap, |
| struct pj_timer_entry *entry) |
| { |
| pj_str_t *key; |
| pjsip_transaction *tsx; |
| |
| PJ_UNUSED_ARG(timer_heap); |
| |
| key = (pj_str_t*)entry->user_data; |
| tsx = pjsip_tsx_layer_find_tsx(key, PJ_FALSE); |
| /* Chance of race condition here */ |
| if (tsx) { |
| pjsip_tsx_terminate(tsx, PJSIP_SC_REQUEST_UPDATED); |
| } |
| } |
| |
| |
| /* |
| * Attach subscription session to newly created transaction, if appropriate. |
| */ |
| static pjsip_evsub *on_new_transaction( pjsip_transaction *tsx, |
| pjsip_event *event) |
| { |
| /* |
| * Newly created transaction will not have subscription session |
| * attached to it. Find the subscription session from the dialog, |
| * by matching the Event header. |
| */ |
| pjsip_dialog *dlg; |
| pjsip_event_hdr *event_hdr; |
| pjsip_msg *msg; |
| struct dlgsub *dlgsub_head, *dlgsub; |
| pjsip_evsub *sub; |
| |
| dlg = pjsip_tsx_get_dlg(tsx); |
| if (!dlg) { |
| pj_assert(!"Transaction should have a dialog instance!"); |
| return NULL; |
| } |
| |
| |
| switch (event->body.tsx_state.type) { |
| case PJSIP_EVENT_RX_MSG: |
| msg = event->body.tsx_state.src.rdata->msg_info.msg; |
| break; |
| case PJSIP_EVENT_TX_MSG: |
| msg = event->body.tsx_state.src.tdata->msg; |
| break; |
| default: |
| if (tsx->role == PJSIP_ROLE_UAC) |
| msg = tsx->last_tx->msg; |
| else |
| msg = NULL; |
| break; |
| } |
| |
| if (!msg) { |
| //Note: |
| // this transaction can be other transaction in the dialog. |
| // The assertion below probably only valid for dialog that |
| // only has one event subscription usage. |
| //pj_assert(!"First transaction event is not TX or RX!"); |
| return NULL; |
| } |
| |
| event_hdr = (pjsip_event_hdr*) |
| pjsip_msg_find_hdr_by_names(msg, &STR_EVENT, |
| &STR_EVENT_S, NULL); |
| if (!event_hdr) { |
| /* Not subscription related message */ |
| return NULL; |
| } |
| |
| /* Find the subscription in the dialog, based on the content |
| * of Event header: |
| */ |
| |
| dlgsub_head = (struct dlgsub*) dlg->mod_data[mod_evsub.mod.id]; |
| if (dlgsub_head == NULL) { |
| dlgsub_head = PJ_POOL_ALLOC_T(dlg->pool, struct dlgsub); |
| pj_list_init(dlgsub_head); |
| dlg->mod_data[mod_evsub.mod.id] = dlgsub_head; |
| } |
| dlgsub = dlgsub_head->next; |
| |
| while (dlgsub != dlgsub_head) { |
| |
| if (pj_stricmp(&dlgsub->sub->event->event_type, |
| &event_hdr->event_type)==0) |
| { |
| /* Event type matched. |
| * Check if event ID matched too. |
| */ |
| if (pj_strcmp(&dlgsub->sub->event->id_param, |
| &event_hdr->id_param)==0) |
| { |
| /* Skip this subscription if it has no event ID and has been |
| * terminated (see ticket #1647). |
| */ |
| if ((dlgsub->sub->option & PJSIP_EVSUB_NO_EVENT_ID) && |
| (pjsip_evsub_get_state(dlgsub->sub)== |
| PJSIP_EVSUB_STATE_TERMINATED)) |
| { |
| dlgsub = dlgsub->next; |
| continue; |
| } else { |
| break; |
| } |
| |
| } |
| /* |
| * Otherwise if it is an UAC subscription, AND |
| * PJSIP_EVSUB_NO_EVENT_ID flag is set, AND |
| * the session's event id is NULL, AND |
| * the incoming request is NOTIFY with event ID, then |
| * we consider it as a match, and update the |
| * session's event id. |
| */ |
| else if (dlgsub->sub->role == PJSIP_ROLE_UAC && |
| (dlgsub->sub->option & PJSIP_EVSUB_NO_EVENT_ID)!=0 && |
| dlgsub->sub->event->id_param.slen==0 && |
| !pjsip_method_cmp(&tsx->method, &pjsip_notify_method)) |
| { |
| /* Update session's event id. */ |
| pj_strdup(dlgsub->sub->pool, |
| &dlgsub->sub->event->id_param, |
| &event_hdr->id_param); |
| |
| break; |
| } |
| } |
| |
| |
| |
| dlgsub = dlgsub->next; |
| } |
| |
| /* Note: |
| * the second condition is for http://trac.pjsip.org/repos/ticket/911 |
| */ |
| if (dlgsub == dlgsub_head || |
| (dlgsub->sub && |
| pjsip_evsub_get_state(dlgsub->sub)==PJSIP_EVSUB_STATE_TERMINATED)) |
| { |
| const char *reason_msg = |
| (dlgsub == dlgsub_head ? "Subscription Does Not Exist" : |
| "Subscription already terminated"); |
| |
| /* This could be incoming request to create new subscription */ |
| PJ_LOG(4,(THIS_FILE, |
| "%s for %.*s, event=%.*s;id=%.*s", |
| reason_msg, |
| (int)tsx->method.name.slen, |
| tsx->method.name.ptr, |
| (int)event_hdr->event_type.slen, |
| event_hdr->event_type.ptr, |
| (int)event_hdr->id_param.slen, |
| event_hdr->id_param.ptr)); |
| |
| /* If this is an incoming NOTIFY, reject with 481 */ |
| if (tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_notify_method)==0) |
| { |
| pj_str_t reason; |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| pj_cstr(&reason, reason_msg); |
| status = pjsip_dlg_create_response(dlg, |
| event->body.tsx_state.src.rdata, |
| 481, &reason, |
| &tdata); |
| if (status == PJ_SUCCESS) { |
| status = pjsip_dlg_send_response(dlg, tsx, tdata); |
| } |
| } |
| return NULL; |
| } |
| |
| /* Found! */ |
| sub = dlgsub->sub; |
| |
| /* Attach session to the transaction */ |
| tsx->mod_data[mod_evsub.mod.id] = sub; |
| sub->pending_tsx++; |
| |
| /* Special case for outgoing/UAC SUBSCRIBE/REFER transaction. |
| * We can only have one pending UAC SUBSCRIBE/REFER, so if another |
| * transaction is started while previous one still alive, terminate |
| * the older one. |
| * |
| * Sample scenario: |
| * - subscribe sent to destination that doesn't exist, transaction |
| * is still retransmitting request, then unsubscribe is sent. |
| */ |
| if (tsx->role == PJSIP_ROLE_UAC && |
| tsx->state == PJSIP_TSX_STATE_CALLING && |
| (pjsip_method_cmp(&tsx->method, &sub->method) == 0 || |
| pjsip_method_cmp(&tsx->method, &pjsip_subscribe_method) == 0)) |
| { |
| |
| if (sub->pending_sub && |
| sub->pending_sub->state < PJSIP_TSX_STATE_COMPLETED) |
| { |
| pj_timer_entry *timer; |
| pj_str_t *key; |
| pj_time_val timeout = {0, 0}; |
| |
| PJ_LOG(4,(sub->obj_name, |
| "Cancelling pending subscription request")); |
| |
| /* By convention, we use 490 (Request Updated) status code. |
| * When transaction handler (below) see this status code, it |
| * will ignore the transaction. |
| */ |
| /* This unfortunately may cause deadlock, because at the moment |
| * we are holding dialog's mutex. If a response to this |
| * transaction is in progress in another thread, that thread |
| * will deadlock when trying to acquire dialog mutex, because |
| * it is holding the transaction mutex. |
| * |
| * So the solution is to register timer to kill this transaction. |
| */ |
| //pjsip_tsx_terminate(sub->pending_sub, PJSIP_SC_REQUEST_UPDATED); |
| timer = PJ_POOL_ZALLOC_T(dlg->pool, pj_timer_entry); |
| key = PJ_POOL_ALLOC_T(dlg->pool, pj_str_t); |
| pj_strdup(dlg->pool, key, &sub->pending_sub->transaction_key); |
| timer->cb = &terminate_timer_cb; |
| timer->user_data = key; |
| |
| pjsip_endpt_schedule_timer(dlg->endpt, timer, &timeout); |
| } |
| |
| sub->pending_sub = tsx; |
| |
| } |
| |
| return sub; |
| } |
| |
| |
| /* |
| * Create response, adding custome headers and msg body. |
| */ |
| static pj_status_t create_response( pjsip_evsub *sub, |
| pjsip_rx_data *rdata, |
| int st_code, |
| const pj_str_t *st_text, |
| const pjsip_hdr *res_hdr, |
| const pjsip_msg_body *body, |
| pjsip_tx_data **p_tdata) |
| { |
| pjsip_tx_data *tdata; |
| pjsip_hdr *hdr; |
| pj_status_t status; |
| |
| status = pjsip_dlg_create_response(sub->dlg, rdata, |
| st_code, st_text, &tdata); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| *p_tdata = tdata; |
| |
| /* Add response headers. */ |
| hdr = res_hdr->next; |
| while (hdr != res_hdr) { |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_clone(tdata->pool, hdr)); |
| hdr = hdr->next; |
| } |
| |
| /* Add msg body, if any */ |
| if (body) { |
| tdata->msg->body = pjsip_msg_body_clone(tdata->pool, body); |
| if (tdata->msg->body == NULL) { |
| |
| PJ_LOG(4,(THIS_FILE, "Error: unable to clone msg body")); |
| |
| /* Ignore */ |
| return PJ_SUCCESS; |
| } |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Get subscription state from the value of Subscription-State header. |
| */ |
| static void get_hdr_state( pjsip_sub_state_hdr *sub_state, |
| pjsip_evsub_state *state, |
| pj_str_t **state_str ) |
| { |
| if (pj_stricmp(&sub_state->sub_state, &STR_TERMINATED)==0) { |
| |
| *state = PJSIP_EVSUB_STATE_TERMINATED; |
| *state_str = NULL; |
| |
| } else if (pj_stricmp(&sub_state->sub_state, &STR_ACTIVE)==0) { |
| |
| *state = PJSIP_EVSUB_STATE_ACTIVE; |
| *state_str = NULL; |
| |
| } else if (pj_stricmp(&sub_state->sub_state, &STR_PENDING)==0) { |
| |
| *state = PJSIP_EVSUB_STATE_PENDING; |
| *state_str = NULL; |
| |
| } else { |
| |
| *state = PJSIP_EVSUB_STATE_UNKNOWN; |
| *state_str = &sub_state->sub_state; |
| |
| } |
| } |
| |
| /* |
| * Transaction event processing by UAC, after subscription is sent. |
| */ |
| static void on_tsx_state_uac( pjsip_evsub *sub, pjsip_transaction *tsx, |
| pjsip_event *event ) |
| { |
| |
| if (pjsip_method_cmp(&tsx->method, &sub->method)==0 || |
| pjsip_method_cmp(&tsx->method, &pjsip_subscribe_method)==0) |
| { |
| |
| /* Received response to outgoing request that establishes/refresh |
| * subscription. |
| */ |
| |
| /* First time initial request is sent. */ |
| if (sub->state == PJSIP_EVSUB_STATE_NULL && |
| tsx->state == PJSIP_TSX_STATE_CALLING) |
| { |
| set_state(sub, PJSIP_EVSUB_STATE_SENT, NULL, event, NULL); |
| return; |
| } |
| |
| /* Only interested in final response */ |
| if (tsx->state != PJSIP_TSX_STATE_COMPLETED && |
| tsx->state != PJSIP_TSX_STATE_TERMINATED) |
| { |
| return; |
| } |
| |
| /* Clear pending subscription */ |
| if (tsx == sub->pending_sub) { |
| sub->pending_sub = NULL; |
| } else if (sub->pending_sub != NULL) { |
| /* This SUBSCRIBE transaction has been "renewed" with another |
| * SUBSCRIBE, so we can just ignore this. For example, user |
| * sent SUBSCRIBE followed immediately with UN-SUBSCRIBE. |
| */ |
| return; |
| } |
| |
| /* Handle authentication. */ |
| if (tsx->status_code==401 || tsx->status_code==407) { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| if (tsx->state == PJSIP_TSX_STATE_TERMINATED) { |
| /* Previously failed transaction has terminated */ |
| return; |
| } |
| |
| status = pjsip_auth_clt_reinit_req(&sub->dlg->auth_sess, |
| event->body.tsx_state.src.rdata, |
| tsx->last_tx, &tdata); |
| if (status == PJ_SUCCESS) |
| status = pjsip_dlg_send_request(sub->dlg, tdata, -1, NULL); |
| |
| if (status != PJ_SUCCESS) { |
| /* Authentication failed! */ |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, |
| NULL, event, &tsx->status_text); |
| return; |
| } |
| |
| return; |
| } |
| |
| if (tsx->status_code/100 == 2) { |
| |
| /* Successfull SUBSCRIBE request! |
| * This could be: |
| * - response to initial SUBSCRIBE request |
| * - response to subsequent refresh |
| * - response to unsubscription |
| */ |
| |
| if (tsx->state == PJSIP_TSX_STATE_TERMINATED) { |
| /* Ignore; this transaction has been processed before */ |
| return; |
| } |
| |
| /* Update UAC refresh time, if response contains Expires header, |
| * only when we're not unsubscribing. |
| */ |
| if (sub->expires->ivalue != 0) { |
| pjsip_msg *msg; |
| pjsip_expires_hdr *expires; |
| |
| msg = event->body.tsx_state.src.rdata->msg_info.msg; |
| expires = (pjsip_expires_hdr*) |
| pjsip_msg_find_hdr(msg, PJSIP_H_EXPIRES, NULL); |
| if (expires) { |
| sub->expires->ivalue = expires->ivalue; |
| } |
| } |
| |
| /* Update time */ |
| update_expires(sub, sub->expires->ivalue); |
| |
| /* Start UAC refresh timer, only when we're not unsubscribing */ |
| if (sub->expires->ivalue != 0) { |
| unsigned timeout = (sub->expires->ivalue > TIME_UAC_REFRESH) ? |
| sub->expires->ivalue - TIME_UAC_REFRESH : sub->expires->ivalue; |
| |
| PJ_LOG(5,(sub->obj_name, "Will refresh in %d seconds", |
| timeout)); |
| set_timer(sub, TIMER_TYPE_UAC_REFRESH, timeout); |
| |
| } else { |
| /* Otherwise set timer to terminate client subscription when |
| * NOTIFY to end subscription is not received. |
| */ |
| set_timer(sub, TIMER_TYPE_UAC_TERMINATE, TIME_UAC_TERMINATE); |
| } |
| |
| /* Set state, if necessary */ |
| pj_assert(sub->state != PJSIP_EVSUB_STATE_NULL); |
| if (sub->state == PJSIP_EVSUB_STATE_SENT) { |
| set_state(sub, PJSIP_EVSUB_STATE_ACCEPTED, NULL, event, NULL); |
| } |
| |
| } else { |
| |
| /* Failed SUBSCRIBE request! |
| * |
| * The RFC 3265 says that if outgoing SUBSCRIBE fails with status |
| * other than 481, the subscription is still considered valid for |
| * the duration of the last Expires. |
| * |
| * Since we send refresh about 5 seconds (TIME_UAC_REFRESH) before |
| * expiration, theoritically the expiration is still valid for the |
| * next 5 seconds even when we receive non-481 failed response. |
| * |
| * Ah, what the heck! |
| * |
| * Just terminate now! |
| * |
| */ |
| |
| if (sub->state == PJSIP_EVSUB_STATE_TERMINATED) { |
| /* Ignore, has been handled before */ |
| return; |
| } |
| |
| /* Ignore 490 (Request Updated) status. |
| * This happens when application sends SUBSCRIBE/REFER while |
| * another one is still in progress. |
| */ |
| if (tsx->status_code == PJSIP_SC_REQUEST_UPDATED) { |
| return; |
| } |
| |
| /* Kill any timer. */ |
| set_timer(sub, TIMER_TYPE_NONE, 0); |
| |
| /* Set state to TERMINATED */ |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, |
| NULL, event, &tsx->status_text); |
| |
| } |
| |
| } else if (pjsip_method_cmp(&tsx->method, &pjsip_notify_method) == 0) { |
| |
| /* Incoming NOTIFY. |
| * This can be the result of: |
| * - Initial subscription response |
| * - UAS updating the resource info. |
| * - Unsubscription response. |
| */ |
| int st_code = 200; |
| pj_str_t *st_text = NULL; |
| pjsip_hdr res_hdr; |
| pjsip_msg_body *body = NULL; |
| |
| pjsip_rx_data *rdata; |
| pjsip_msg *msg; |
| pjsip_sub_state_hdr *sub_state; |
| |
| pjsip_evsub_state new_state; |
| pj_str_t *new_state_str; |
| |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| /* Only want to handle initial NOTIFY receive event. */ |
| if (tsx->state != PJSIP_TSX_STATE_TRYING) |
| return; |
| |
| |
| rdata = event->body.tsx_state.src.rdata; |
| msg = rdata->msg_info.msg; |
| |
| pj_list_init(&res_hdr); |
| |
| /* Get subscription state header. */ |
| sub_state = (pjsip_sub_state_hdr*) |
| pjsip_msg_find_hdr_by_name(msg, &STR_SUB_STATE, NULL); |
| if (sub_state == NULL) { |
| |
| pjsip_warning_hdr *warn_hdr; |
| pj_str_t warn_text = { "Missing Subscription-State header", 33}; |
| |
| /* Bad request! Add warning header. */ |
| st_code = PJSIP_SC_BAD_REQUEST; |
| warn_hdr = pjsip_warning_hdr_create(rdata->tp_info.pool, 399, |
| pjsip_endpt_name(sub->endpt), |
| &warn_text); |
| pj_list_push_back(&res_hdr, warn_hdr); |
| } |
| |
| /* Call application registered callback to handle incoming NOTIFY, |
| * if any. |
| */ |
| if (st_code==200 && sub->user.on_rx_notify && sub->call_cb) { |
| (*sub->user.on_rx_notify)(sub, rdata, &st_code, &st_text, |
| &res_hdr, &body); |
| |
| /* Application MUST specify final response! */ |
| PJ_ASSERT_ON_FAIL(st_code >= 200, {st_code=200; }); |
| |
| /* Must be a valid status code */ |
| PJ_ASSERT_ON_FAIL(st_code <= 699, {st_code=500; }); |
| } |
| |
| |
| /* If non-2xx should be returned, then send the response. |
| * No need to update server subscription state. |
| */ |
| if (st_code >= 300) { |
| status = create_response(sub, rdata, st_code, st_text, &res_hdr, |
| body, &tdata); |
| if (status == PJ_SUCCESS) { |
| status = pjsip_dlg_send_response(sub->dlg, tsx, tdata); |
| } |
| |
| /* Start timer to terminate subscription, just in case server |
| * is not able to generate NOTIFY to our response. |
| */ |
| if (status == PJ_SUCCESS) { |
| unsigned timeout = TIME_UAC_WAIT_NOTIFY; |
| set_timer(sub, TIMER_TYPE_UAC_WAIT_NOTIFY, timeout); |
| } else { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_str_t reason; |
| |
| reason = pj_strerror(status, errmsg, sizeof(errmsg)); |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, NULL, NULL, |
| &reason); |
| } |
| |
| return; |
| } |
| |
| /* Update expiration from the value of expires param in |
| * Subscription-State header, but ONLY when subscription state |
| * is "active" or "pending", AND the header contains expires param. |
| */ |
| if (sub->expires->ivalue != 0 && |
| sub_state->expires_param >= 0 && |
| (pj_stricmp(&sub_state->sub_state, &STR_ACTIVE)==0 || |
| pj_stricmp(&sub_state->sub_state, &STR_PENDING)==0)) |
| { |
| int next_refresh = sub_state->expires_param; |
| unsigned timeout; |
| |
| update_expires(sub, next_refresh); |
| |
| /* Start UAC refresh timer, only when we're not unsubscribing */ |
| timeout = (next_refresh > TIME_UAC_REFRESH) ? |
| next_refresh - TIME_UAC_REFRESH : next_refresh; |
| |
| PJ_LOG(5,(sub->obj_name, "Will refresh in %d seconds", timeout)); |
| set_timer(sub, TIMER_TYPE_UAC_REFRESH, timeout); |
| } |
| |
| /* Find out the state */ |
| get_hdr_state(sub_state, &new_state, &new_state_str); |
| |
| /* Send response. */ |
| status = create_response(sub, rdata, st_code, st_text, &res_hdr, |
| body, &tdata); |
| if (status == PJ_SUCCESS) |
| status = pjsip_dlg_send_response(sub->dlg, tsx, tdata); |
| |
| /* Set the state */ |
| if (status == PJ_SUCCESS) { |
| set_state(sub, new_state, new_state_str, event, |
| &sub_state->reason_param); |
| } else { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_str_t reason; |
| |
| reason = pj_strerror(status, errmsg, sizeof(errmsg)); |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, NULL, event, |
| &reason); |
| } |
| |
| |
| } else { |
| |
| /* |
| * Unexpected method! |
| */ |
| PJ_LOG(4,(sub->obj_name, "Unexpected transaction method %.*s", |
| (int)tsx->method.name.slen, tsx->method.name.ptr)); |
| } |
| } |
| |
| |
| /* |
| * Transaction event processing by UAS, after subscription is accepted. |
| */ |
| static void on_tsx_state_uas( pjsip_evsub *sub, pjsip_transaction *tsx, |
| pjsip_event *event) |
| { |
| |
| if (pjsip_method_cmp(&tsx->method, &sub->method) == 0 || |
| pjsip_method_cmp(&tsx->method, &pjsip_subscribe_method) == 0) |
| { |
| |
| /* |
| * Incoming request (e.g. SUBSCRIBE or REFER) to refresh subsciption. |
| * |
| */ |
| pjsip_rx_data *rdata; |
| pjsip_event_hdr *event_hdr; |
| pjsip_expires_hdr *expires; |
| pjsip_msg *msg; |
| pjsip_tx_data *tdata; |
| int st_code = 200; |
| pj_str_t *st_text = NULL; |
| pjsip_hdr res_hdr; |
| pjsip_msg_body *body = NULL; |
| pjsip_evsub_state old_state; |
| pj_str_t old_state_str; |
| pj_str_t reason = { NULL, 0 }; |
| pj_status_t status; |
| |
| |
| /* Only wants to handle the first event when the request is |
| * received. |
| */ |
| if (tsx->state != PJSIP_TSX_STATE_TRYING) |
| return; |
| |
| rdata = event->body.tsx_state.src.rdata; |
| msg = rdata->msg_info.msg; |
| |
| /* Set expiration time based on client request (in Expires header), |
| * or package default expiration time. |
| */ |
| event_hdr = (pjsip_event_hdr*) |
| pjsip_msg_find_hdr_by_names(msg, &STR_EVENT, |
| &STR_EVENT, NULL); |
| expires = (pjsip_expires_hdr*) |
| pjsip_msg_find_hdr(msg, PJSIP_H_EXPIRES, NULL); |
| if (event_hdr && expires) { |
| struct evpkg *evpkg; |
| |
| evpkg = find_pkg(&event_hdr->event_type); |
| if (evpkg) { |
| if (expires->ivalue < (pj_int32_t)evpkg->pkg_expires) |
| sub->expires->ivalue = expires->ivalue; |
| else |
| sub->expires->ivalue = evpkg->pkg_expires; |
| } |
| } |
| |
| /* Update time (before calling on_rx_refresh, since application |
| * will send NOTIFY. |
| */ |
| update_expires(sub, sub->expires->ivalue); |
| |
| |
| /* Save old state. |
| * If application respond with non-2xx, revert to old state. |
| */ |
| old_state = sub->state; |
| old_state_str = sub->state_str; |
| |
| if (sub->expires->ivalue == 0) { |
| sub->state = PJSIP_EVSUB_STATE_TERMINATED; |
| sub->state_str = evsub_state_names[sub->state]; |
| } else if (sub->state == PJSIP_EVSUB_STATE_NULL) { |
| sub->state = PJSIP_EVSUB_STATE_ACCEPTED; |
| sub->state_str = evsub_state_names[sub->state]; |
| } |
| |
| /* Call application's on_rx_refresh, just in case it wants to send |
| * response other than 200 (OK) |
| */ |
| pj_list_init(&res_hdr); |
| |
| if (sub->user.on_rx_refresh && sub->call_cb) { |
| (*sub->user.on_rx_refresh)(sub, rdata, &st_code, &st_text, |
| &res_hdr, &body); |
| } |
| |
| /* Application MUST specify final response! */ |
| PJ_ASSERT_ON_FAIL(st_code >= 200, {st_code=200; }); |
| |
| /* Must be a valid status code */ |
| PJ_ASSERT_ON_FAIL(st_code <= 699, {st_code=500; }); |
| |
| |
| /* Create and send response */ |
| status = create_response(sub, rdata, st_code, st_text, &res_hdr, |
| body, &tdata); |
| if (status == PJ_SUCCESS) { |
| /* Add expires header: */ |
| pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*) |
| pjsip_hdr_shallow_clone(tdata->pool, |
| sub->expires)); |
| |
| /* Send */ |
| status = pjsip_dlg_send_response(sub->dlg, tsx, tdata); |
| } |
| |
| /* Update state or revert state */ |
| if (st_code/100==2) { |
| |
| if (sub->expires->ivalue == 0) { |
| set_state(sub, sub->state, NULL, event, &reason); |
| } else if (sub->state == PJSIP_EVSUB_STATE_NULL) { |
| set_state(sub, sub->state, NULL, event, &reason); |
| } |
| |
| /* Set UAS timeout timer, when state is not terminated. */ |
| if (sub->state != PJSIP_EVSUB_STATE_TERMINATED) { |
| PJ_LOG(5,(sub->obj_name, "UAS timeout in %d seconds", |
| sub->expires->ivalue)); |
| set_timer(sub, TIMER_TYPE_UAS_TIMEOUT, |
| sub->expires->ivalue); |
| } |
| |
| } else { |
| sub->state = old_state; |
| sub->state_str = old_state_str; |
| } |
| |
| |
| } else if (pjsip_method_cmp(&tsx->method, &pjsip_notify_method)==0) { |
| |
| /* Handle authentication */ |
| if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| (tsx->status_code==401 || tsx->status_code==407)) |
| { |
| pjsip_rx_data *rdata = event->body.tsx_state.src.rdata; |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| status = pjsip_auth_clt_reinit_req( &sub->dlg->auth_sess, rdata, |
| tsx->last_tx, &tdata); |
| if (status == PJ_SUCCESS) |
| status = pjsip_dlg_send_request( sub->dlg, tdata, -1, NULL ); |
| |
| if (status != PJ_SUCCESS) { |
| /* Can't authenticate. Terminate session (?) */ |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, NULL, NULL, |
| &tsx->status_text); |
| return; |
| } |
| |
| } |
| /* |
| * Terminate event usage if we receive 481, 408, and 7 class |
| * responses. |
| */ |
| if (sub->state != PJSIP_EVSUB_STATE_TERMINATED && |
| (tsx->status_code==481 || tsx->status_code==408 || |
| tsx->status_code/100 == 7)) |
| { |
| set_state(sub, PJSIP_EVSUB_STATE_TERMINATED, NULL, event, |
| &tsx->status_text); |
| return; |
| } |
| |
| } else { |
| |
| /* |
| * Unexpected method! |
| */ |
| PJ_LOG(4,(sub->obj_name, "Unexpected transaction method %.*s", |
| (int)tsx->method.name.slen, tsx->method.name.ptr)); |
| |
| } |
| } |
| |
| |
| /* |
| * Notification when transaction state has changed! |
| */ |
| static void mod_evsub_on_tsx_state(pjsip_transaction *tsx, pjsip_event *event) |
| { |
| pjsip_evsub *sub = pjsip_tsx_get_evsub(tsx); |
| |
| if (sub == NULL) { |
| sub = on_new_transaction(tsx, event); |
| if (sub == NULL) |
| return; |
| } |
| |
| |
| /* Call on_tsx_state callback, if any. */ |
| if (sub->user.on_tsx_state && sub->call_cb) |
| (*sub->user.on_tsx_state)(sub, tsx, event); |
| |
| |
| /* Process the event: */ |
| |
| if (sub->role == PJSIP_ROLE_UAC) { |
| on_tsx_state_uac(sub, tsx, event); |
| } else { |
| on_tsx_state_uas(sub, tsx, event); |
| } |
| |
| |
| /* Check transaction TERMINATE event */ |
| if (tsx->state == PJSIP_TSX_STATE_TERMINATED) { |
| |
| --sub->pending_tsx; |
| |
| if (sub->state == PJSIP_EVSUB_STATE_TERMINATED && |
| sub->pending_tsx == 0) |
| { |
| evsub_destroy(sub); |
| } |
| |
| } |
| } |
| |
| |