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-rw-r--r--protocols/Tox/toxcore/toxav/msi.c1947
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diff --git a/protocols/Tox/toxcore/toxav/msi.c b/protocols/Tox/toxcore/toxav/msi.c
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+++ b/protocols/Tox/toxcore/toxav/msi.c
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+/** msi.c
+ *
+ * Copyright (C) 2013 Tox project All Rights Reserved.
+ *
+ * This file is part of Tox.
+ *
+ * Tox 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include "../toxcore/logger.h"
+#include "../toxcore/util.h"
+
+#include "msi.h"
+
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#define MSI_MAXMSG_SIZE 256
+
+/* Define default timeout for a request.
+ * There is no behavior specified by the msi on what will
+ * client do on timeout, but to call timeout callback.
+ */
+#define m_deftout 10000 /* in milliseconds */
+
+/**
+ * Protocol:
+ *
+ * |id [1 byte]| |size [1 byte]| |data [$size bytes]| |...{repeat}| |0 {end byte}|
+ */
+
+typedef uint8_t MSIRawCSettingsType[23];
+
+typedef enum {
+ IDRequest = 1,
+ IDResponse,
+ IDReason,
+ IDCallId,
+ IDCSettings,
+
+} MSIHeaderID;
+
+typedef enum {
+ TypeRequest,
+ TypeResponse,
+
+} MSIMessageType;
+
+typedef enum {
+ invite,
+ start,
+ cancel,
+ reject,
+ end,
+
+} MSIRequest;
+
+typedef enum {
+ ringing,
+ starting,
+ ending,
+ error
+
+} MSIResponse;
+
+
+#define GENERIC_HEADER(header, val_type) \
+typedef struct _MSIHeader##header { \
+val_type value; \
+_Bool exists; \
+} MSIHeader##header;
+
+
+GENERIC_HEADER ( Request, MSIRequest )
+GENERIC_HEADER ( Response, MSIResponse )
+GENERIC_HEADER ( CallId, MSICallIDType )
+GENERIC_HEADER ( Reason, MSIReasonStrType )
+GENERIC_HEADER ( CSettings, MSIRawCSettingsType )
+
+
+/**
+ * @brief This is the message structure. It contains all of the headers and
+ * destination/source of the message stored in friend_id.
+ *
+ */
+typedef struct _MSIMessage {
+
+ MSIHeaderRequest request;
+ MSIHeaderResponse response;
+ MSIHeaderReason reason;
+ MSIHeaderCallId callid;
+ MSIHeaderCSettings csettings;
+
+ int friend_id;
+
+} MSIMessage;
+
+
+inline__ void invoke_callback(MSISession *session, int32_t call_index, MSICallbackID id)
+{
+ if ( session->callbacks[id].function ) {
+ LOGGER_DEBUG("Invoking callback function: %d", id);
+ session->callbacks[id].function ( session->agent_handler, call_index, session->callbacks[id].data );
+ }
+}
+
+/**
+ * @brief Parse raw 'data' received from socket into MSIMessage struct.
+ * Every message has to have end value of 'end_byte' or _undefined_ behavior
+ * occures. The best practice is to check the end of the message at the handle_packet.
+ *
+ * @param msg Container.
+ * @param data The data.
+ * @return int
+ * @retval -1 Error occurred.
+ * @retval 0 Success.
+ */
+static int parse_raw_data ( MSIMessage *msg, const uint8_t *data, uint16_t length )
+{
+
+#define FAIL_CONSTRAINT(constraint, wanted) if ((constraint -= wanted) < 1) { LOGGER_ERROR("Read over length!"); return -1; }
+#define FAIL_SIZE(byte, valid) if ( byte != valid ) { LOGGER_ERROR("Invalid data size!"); return -1; }
+#define FAIL_LIMITS(byte, high) if ( byte > high ) { LOGGER_ERROR("Failed limit!"); return -1; }
+
+ if ( msg == NULL ) {
+ LOGGER_ERROR("Could not parse message: no storage!");
+ return -1;
+ }
+
+ if ( data[length - 1] ) { /* End byte must have value 0 */
+ LOGGER_ERROR("Invalid end byte");
+ return -1;
+ }
+
+ const uint8_t *it = data;
+ int size_constraint = length;
+
+ while ( *it ) {/* until end byte is hit */
+ switch (*it) {
+ case IDRequest:
+ FAIL_CONSTRAINT(size_constraint, 3);
+ FAIL_SIZE(it[1], 1);
+// FAIL_LIMITS(it[2], invite, end);
+ FAIL_LIMITS(it[2], end);
+ msg->request.value = it[2];
+ it += 3;
+ msg->request.exists = 1;
+ break;
+
+ case IDResponse:
+ FAIL_CONSTRAINT(size_constraint, 3);
+ FAIL_SIZE(it[1], 1);
+// FAIL_LIMITS(it[2], ringing, error);
+ FAIL_LIMITS(it[2], error);
+ msg->response.value = it[2];
+ it += 3;
+ msg->response.exists = 1;
+ break;
+
+ case IDCallId:
+ FAIL_CONSTRAINT(size_constraint, sizeof(MSICallIDType) + 2);
+ FAIL_SIZE(it[1], sizeof(MSICallIDType));
+ memcpy(msg->callid.value, it + 2, sizeof(MSICallIDType));
+ it += sizeof(MSICallIDType) + 2;
+ msg->callid.exists = 1;
+ break;
+
+ case IDReason:
+ FAIL_CONSTRAINT(size_constraint, sizeof(MSIReasonStrType) + 2);
+ FAIL_SIZE(it[1], sizeof(MSIReasonStrType));
+ memcpy(msg->reason.value, it + 2, sizeof(MSIReasonStrType));
+ it += sizeof(MSIReasonStrType) + 2;
+ msg->reason.exists = 1;
+ break;
+
+ case IDCSettings:
+ FAIL_CONSTRAINT(size_constraint, sizeof(MSIRawCSettingsType) + 2);
+ FAIL_SIZE(it[1], sizeof(MSIRawCSettingsType));
+ memcpy(msg->csettings.value, it + 2, sizeof(MSIRawCSettingsType));
+ it += sizeof(MSIRawCSettingsType) + 2;
+ msg->csettings.exists = 1;
+ break;
+
+ default:
+ LOGGER_ERROR("Invalid id byte");
+ return -1;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * @brief Create the message.
+ *
+ * @param type Request or response.
+ * @param type_id Type of request/response.
+ * @return MSIMessage* Created message.
+ * @retval NULL Error occurred.
+ */
+MSIMessage *msi_new_message ( MSIMessageType type, const uint8_t type_value )
+{
+ MSIMessage *retu = calloc ( sizeof ( MSIMessage ), 1 );
+
+ if ( retu == NULL ) {
+ LOGGER_WARNING("Allocation failed! Program might misbehave!");
+ return NULL;
+ }
+
+ if ( type == TypeRequest ) {
+ retu->request.exists = 1;
+ retu->request.value = type_value;
+
+ } else {
+ retu->response.exists = 1;
+ retu->response.value = type_value;
+ }
+
+ return retu;
+}
+
+
+/**
+ * @brief Parse data from handle_packet.
+ *
+ * @param data The data.
+ * @return MSIMessage* Parsed message.
+ * @retval NULL Error occurred.
+ */
+MSIMessage *parse_recv ( const uint8_t *data, uint16_t length )
+{
+ if ( data == NULL ) {
+ LOGGER_WARNING("Tried to parse empty message!");
+ return NULL;
+ }
+
+ MSIMessage *retu = calloc ( sizeof ( MSIMessage ), 1 );
+
+ if ( retu == NULL ) {
+ LOGGER_WARNING("Allocation failed! Program might misbehave!");
+ return NULL;
+ }
+
+ if ( parse_raw_data ( retu, data, length ) == -1 ) {
+
+ free ( retu );
+ return NULL;
+ }
+
+ return retu;
+}
+
+
+/**
+ * @brief Speaks for it self.
+ *
+ * @param dest Container.
+ * @param header_field Field.
+ * @param header_value Field value.
+ * @param value_len Length of field value.
+ * @param length Pointer to container length.
+ * @return uint8_t* Iterated container.
+ */
+uint8_t *format_output ( uint8_t *dest, MSIHeaderID id, const void *value, uint8_t value_len, uint16_t *length )
+{
+ if ( dest == NULL ) {
+ LOGGER_ERROR("No destination space!");
+ return NULL;
+ }
+
+ if (value == NULL || value_len == 0) {
+ LOGGER_ERROR("Empty header value");
+ return NULL;
+ }
+
+ *dest = id;
+ dest ++;
+ *dest = value_len;
+ dest ++;
+
+ memcpy(dest, value, value_len);
+
+ *length += (2 + value_len);
+
+ return dest + value_len; /* Set to next position ready to be written */
+}
+
+
+/**
+ * @brief Parse MSIMessage to send.
+ *
+ * @param msg The message.
+ * @param dest Destination.
+ * @return uint16_t Its final size.
+ */
+uint16_t parse_send ( MSIMessage *msg, uint8_t *dest )
+{
+ if (msg == NULL) {
+ LOGGER_ERROR("No message!");
+ return 0;
+ }
+
+ if (dest == NULL ) {
+ LOGGER_ERROR("No destination!");
+ return 0;
+ }
+
+ uint8_t *it = dest;
+ uint16_t size = 0;
+
+ if (msg->request.exists) {
+ uint8_t cast = msg->request.value;
+ it = format_output(it, IDRequest, &cast, 1, &size);
+ }
+
+ if (msg->response.exists) {
+ uint8_t cast = msg->response.value;
+ it = format_output(it, IDResponse, &cast, 1, &size);
+ }
+
+ if (msg->callid.exists) {
+ it = format_output(it, IDCallId, &msg->callid.value, sizeof(msg->callid.value), &size);
+ }
+
+ if (msg->reason.exists) {
+ it = format_output(it, IDReason, &msg->reason.value, sizeof(msg->reason.value), &size);
+ }
+
+ if (msg->csettings.exists) {
+ it = format_output(it, IDCSettings, &msg->csettings.value, sizeof(msg->csettings.value), &size);
+ }
+
+ *it = 0;
+ size ++;
+
+ return size;
+}
+
+void msi_msg_set_reason ( MSIMessage *msg, const MSIReasonStrType value )
+{
+ if ( !msg ) return;
+
+ msg->reason.exists = 1;
+ memcpy(msg->reason.value, value, sizeof(MSIReasonStrType));
+}
+
+void msi_msg_set_callid ( MSIMessage *msg, const MSICallIDType value )
+{
+ if ( !msg ) return;
+
+ msg->callid.exists = 1;
+ memcpy(msg->callid.value, value, sizeof(MSICallIDType));
+}
+
+void msi_msg_set_csettings ( MSIMessage *msg, const MSICSettings *value )
+{
+ if ( !msg ) return;
+
+ msg->csettings.exists = 1;
+
+ msg->csettings.value[0] = value->call_type;
+ uint8_t *iter = msg->csettings.value + 1;
+
+ /* Video bitrate */
+ uint32_t lval = htonl(value->video_bitrate);
+ memcpy(iter, &lval, 4);
+ iter += 4;
+
+ /* Video max width */
+ uint16_t sval = htons(value->max_video_width);
+ memcpy(iter, &sval, 2);
+ iter += 2;
+
+ /* Video max height */
+ sval = htons(value->max_video_height);
+ memcpy(iter, &sval, 2);
+ iter += 2;
+
+ /* Audio bitrate */
+ lval = htonl(value->audio_bitrate);
+ memcpy(iter, &lval, 4);
+ iter += 4;
+
+ /* Audio frame duration */
+ sval = htons(value->audio_frame_duration);
+ memcpy(iter, &sval, 2);
+ iter += 2;
+
+ /* Audio sample rate */
+ lval = htonl(value->audio_sample_rate);
+ memcpy(iter, &lval, 4);
+ iter += 4;
+
+ /* Audio channels */
+ lval = htonl(value->audio_channels);
+ memcpy(iter, &lval, 4);
+}
+
+void msi_msg_get_csettings ( MSIMessage *msg, MSICSettings *dest )
+{
+ if ( !msg || !dest || !msg->csettings.exists ) return;
+
+ dest->call_type = msg->csettings.value[0];
+ uint8_t *iter = msg->csettings.value + 1;
+
+ memcpy(&dest->video_bitrate, iter, 4);
+ iter += 4;
+ dest->video_bitrate = ntohl(dest->video_bitrate);
+
+ memcpy(&dest->max_video_width, iter, 2);
+ iter += 2;
+ dest->max_video_width = ntohs(dest->max_video_width);
+
+ memcpy(&dest->max_video_height, iter, 2);
+ iter += 2;
+ dest->max_video_height = ntohs(dest->max_video_height);
+
+ memcpy(&dest->audio_bitrate, iter, 4);
+ iter += 4;
+ dest->audio_bitrate = ntohl(dest->audio_bitrate);
+
+ memcpy(&dest->audio_frame_duration, iter, 2);
+ iter += 2;
+ dest->audio_frame_duration = ntohs(dest->audio_frame_duration);
+
+ memcpy(&dest->audio_sample_rate, iter, 4);
+ iter += 4;
+ dest->audio_sample_rate = ntohl(dest->audio_sample_rate);
+
+ memcpy(&dest->audio_channels, iter, 4);
+ dest->audio_channels = ntohl(dest->audio_channels);
+}
+
+typedef struct _Timer {
+ void *(*func)(void *);
+ void *func_arg1;
+ int func_arg2;
+ uint64_t timeout;
+ int idx;
+
+} Timer;
+
+typedef struct _TimerHandler {
+ Timer **timers;
+ pthread_mutex_t mutex;
+
+ uint32_t max_capacity;
+ uint32_t size;
+ uint64_t resolution;
+
+ _Bool running;
+
+} TimerHandler;
+
+struct timer_function_args {
+ void *arg1;
+ int arg2;
+};
+
+/**
+ * @brief Allocate timer in array
+ *
+ * @param timers_container Handler
+ * @param func Function to be executed
+ * @param arg Its args
+ * @param timeout Timeout in ms
+ * @return int
+ */
+static int timer_alloc ( TimerHandler *timers_container, void *(func)(void *), void *arg1, int arg2, uint32_t timeout)
+{
+ static int timer_id;
+ pthread_mutex_lock(&timers_container->mutex);
+
+ uint32_t i = 0;
+
+ for (; i < timers_container->max_capacity && timers_container->timers[i]; i ++);
+
+ if (i == timers_container->max_capacity) {
+ LOGGER_WARNING("Maximum capacity reached!");
+ pthread_mutex_unlock(&timers_container->mutex);
+ return -1;
+ }
+
+ Timer *timer = timers_container->timers[i] = calloc(sizeof(Timer), 1);
+
+ if (timer == NULL) {
+ LOGGER_ERROR("Failed to allocate timer!");
+ pthread_mutex_unlock(&timers_container->mutex);
+ return -1;
+ }
+
+ timers_container->size ++;
+
+ timer->func = func;
+ timer->func_arg1 = arg1;
+ timer->func_arg2 = arg2;
+ timer->timeout = timeout + current_time_monotonic(); /* In ms */
+ ++timer_id;
+ timer->idx = timer_id;
+
+ /* reorder */
+ if (i) {
+ int64_t j = i - 1;
+
+ for (; j >= 0 && timeout < timers_container->timers[j]->timeout; j--) {
+ Timer *tmp = timers_container->timers[j];
+ timers_container->timers[j] = timer;
+ timers_container->timers[j + 1] = tmp;
+ }
+ }
+
+ pthread_mutex_unlock(&timers_container->mutex);
+
+ LOGGER_DEBUG("Allocated timer index: %ull timeout: %ull, current size: %ull", i, timeout, timers_container->size);
+ return timer->idx;
+}
+
+/**
+ * @brief Remove timer from array
+ *
+ * @param timers_container handler
+ * @param idx timer id
+ * @param lock_mutex (does the mutex need to be locked)
+ * @return int
+ */
+static int timer_release ( TimerHandler *timers_container, int idx , int lock_mutex)
+{
+ if (lock_mutex)
+ pthread_mutex_lock(&timers_container->mutex);
+
+ Timer **timed_events = timers_container->timers;
+
+ size_t i;
+ int rc = -1;
+
+ for (i = 0; i < timers_container->max_capacity; ++i) {
+ if (timed_events[i] && timed_events[i]->idx == idx) {
+ rc = i;
+ break;
+ }
+ }
+
+ if (rc == -1) {
+ LOGGER_WARNING("No event with id: %d", idx);
+
+ if (lock_mutex) pthread_mutex_unlock(&timers_container->mutex);
+
+ return -1;
+ }
+
+ free(timed_events[rc]);
+
+ timed_events[rc] = NULL;
+
+ i = rc + 1;
+
+ for (; i < timers_container->max_capacity && timed_events[i]; i ++) {
+ timed_events[i - 1] = timed_events[i];
+ timed_events[i] = NULL;
+ }
+
+ timers_container->size--;
+
+ LOGGER_DEBUG("Popped id: %d, current size: %ull ", idx, timers_container->size);
+
+ if (lock_mutex) pthread_mutex_unlock(&timers_container->mutex);
+
+ return 0;
+}
+
+/**
+ * @brief Main poll for timer execution
+ *
+ * @param arg ...
+ * @return void*
+ */
+static void *timer_poll( void *arg )
+{
+ TimerHandler *handler = arg;
+
+ while ( handler->running ) {
+
+ pthread_mutex_lock(&handler->mutex);
+
+ if ( handler->running ) {
+
+ uint64_t time = current_time_monotonic();
+
+ while ( handler->timers[0] && handler->timers[0]->timeout < time ) {
+ pthread_t tid;
+
+ struct timer_function_args *args = malloc(sizeof(struct timer_function_args));
+ args->arg1 = handler->timers[0]->func_arg1;
+ args->arg2 = handler->timers[0]->func_arg2;
+
+ if ( 0 != pthread_create(&tid, NULL, handler->timers[0]->func, args) ||
+ 0 != pthread_detach(tid) ) {
+ LOGGER_ERROR("Failed to execute timer at: %d!", handler->timers[0]->timeout);
+ free(args);
+ } else {
+ LOGGER_DEBUG("Exectued timer assigned at: %d", handler->timers[0]->timeout);
+ }
+
+ timer_release(handler, handler->timers[0]->idx, 0);
+ }
+
+ }
+
+ pthread_mutex_unlock(&handler->mutex);
+
+ usleep(handler->resolution);
+ }
+
+ pthread_exit(NULL);
+}
+
+/**
+ * @brief Start timer poll and return handler
+ *
+ * @param max_capacity capacity
+ * @param resolution ...
+ * @return TimerHandler*
+ */
+static TimerHandler *timer_init_session (int max_capacity, int resolution)
+{
+ TimerHandler *handler = calloc(1, sizeof(TimerHandler));
+
+ if (handler == NULL) {
+ LOGGER_ERROR("Failed to allocate memory, program might misbehave!");
+ return NULL;
+ }
+
+ handler->timers = calloc(max_capacity, sizeof(Timer *));
+
+ if (handler->timers == NULL) {
+ LOGGER_ERROR("Failed to allocate %d timed events!", max_capacity);
+ free(handler);
+ return NULL;
+ }
+
+ handler->max_capacity = max_capacity;
+ handler->running = 1;
+ handler->resolution = resolution;
+
+ pthread_mutex_init(&handler->mutex, NULL);
+
+
+ pthread_t _tid;
+
+ if ( 0 != pthread_create(&_tid, NULL, timer_poll, handler) || 0 != pthread_detach(_tid) ) {
+ LOGGER_ERROR("Failed to start timer poll thread!");
+ free(handler->timers);
+ free(handler);
+ return NULL;
+ }
+
+ return handler;
+}
+
+/**
+ * @brief Terminate timer session
+ *
+ * @param handler The timer handler
+ * @return void
+ */
+static void timer_terminate_session(TimerHandler *handler)
+{
+ pthread_mutex_lock(&handler->mutex);
+
+ handler->running = 0;
+
+ pthread_mutex_unlock(&handler->mutex);
+
+ size_t i = 0;
+
+ for (; i < handler->max_capacity; i ++)
+ free(handler->timers[i]);
+
+ free(handler->timers);
+
+ pthread_mutex_destroy( &handler->mutex );
+}
+
+/**
+ * @brief Generate _random_ alphanumerical string.
+ *
+ * @param str Destination.
+ * @param size Size of string.
+ * @return void
+ */
+static void t_randomstr ( uint8_t *str, uint32_t size )
+{
+ if (str == NULL) {
+ LOGGER_DEBUG("Empty destination!");
+ return;
+ }
+
+ static const uint8_t _bytes[] =
+ "0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz";
+
+ uint32_t _it = 0;
+
+ for ( ; _it < size; _it++ ) {
+ str[_it] = _bytes[ random_int() % 61 ];
+ }
+}
+
+
+typedef enum {
+ error_none,
+ error_deadcall, /* has call id but it's from old call */
+ error_id_mismatch, /* non-existing call */
+
+ error_no_callid, /* not having call id */
+ error_no_call, /* no call in session */
+ error_no_crypto_key, /* no crypto key */
+
+ error_busy
+
+} MSICallError; /* Error codes */
+
+
+/**
+ * @brief Stringify error code.
+ *
+ * @param error_code The code.
+ * @return const uint8_t* The string.
+ */
+static inline__ const uint8_t *stringify_error ( MSICallError error_code )
+{
+ static const uint8_t *strings[] = {
+ ( uint8_t *) "",
+ ( uint8_t *) "Using dead call",
+ ( uint8_t *) "Call id not set to any call",
+ ( uint8_t *) "Call id not available",
+ ( uint8_t *) "No active call in session",
+ ( uint8_t *) "No Crypto-key set",
+ ( uint8_t *) "Callee busy"
+ };
+
+ return strings[error_code];
+}
+
+/**
+ * @brief Speaks for it self.
+ *
+ * @param session Control session.
+ * @param msg The message.
+ * @param to Where to.
+ * @return int
+ * @retval -1 Error occurred.
+ * @retval 0 Success.
+ */
+static int send_message ( MSISession *session, MSICall *call, MSIMessage *msg, uint32_t to )
+{
+ msi_msg_set_callid ( msg, call->id );
+
+ uint8_t msg_string_final [MSI_MAXMSG_SIZE];
+ uint16_t length = parse_send ( msg, msg_string_final );
+
+ if (!length) {
+ LOGGER_WARNING("Parsing message failed; nothing sent!");
+ return -1;
+ }
+
+ if ( m_msi_packet(session->messenger_handle, to, msg_string_final, length) ) {
+ LOGGER_DEBUG("Sent message");
+ return 0;
+ }
+
+ return -1;
+}
+
+inline__ int send_reponse ( MSISession *session, MSICall *call, MSIResponse response, uint32_t to )
+{
+ MSIMessage *msg = msi_new_message ( TypeResponse, response );
+ int ret = send_message ( session, call, msg, to );
+ free ( msg );
+ return ret;
+}
+
+/**
+ * @brief Determine 'bigger' call id
+ *
+ * @param first duh
+ * @param second duh
+ * @return int
+ * @retval 0 it's first
+ * @retval 1 it's second
+ */
+static int call_id_bigger( const uint8_t *first, const uint8_t *second)
+{
+ return (memcmp(first, second, sizeof(MSICallIDType)) < 0);
+}
+
+
+/**
+ * @brief Speaks for it self.
+ *
+ * @param session Control session.
+ * @param msg The message.
+ * @param peer_id The peer.
+ * @return -1, 0
+ */
+static int flush_peer_csettings ( MSICall *call, MSIMessage *msg, int peer_id )
+{
+ if ( msg->csettings.exists ) {
+ msi_msg_get_csettings(msg, &call->csettings_peer[peer_id]);
+
+ LOGGER_DEBUG("Peer: %d \n"
+ "Type: %u \n"
+ "Video bitrate: %u \n"
+ "Video height: %u \n"
+ "Video width: %u \n"
+ "Audio bitrate: %u \n"
+ "Audio framedur: %u \n"
+ "Audio sample rate: %u \n"
+ "Audio channels: %u \n", peer_id,
+ call->csettings_peer[peer_id].call_type,
+ call->csettings_peer[peer_id].video_bitrate,
+ call->csettings_peer[peer_id].max_video_height,
+ call->csettings_peer[peer_id].max_video_width,
+ call->csettings_peer[peer_id].audio_bitrate,
+ call->csettings_peer[peer_id].audio_frame_duration,
+ call->csettings_peer[peer_id].audio_sample_rate,
+ call->csettings_peer[peer_id].audio_channels );
+
+ return 0;
+ }
+
+ LOGGER_WARNING("No csettings header!");
+ return -1;
+}
+
+static int terminate_call ( MSISession *session, MSICall *call );
+
+static void handle_remote_connection_change(Messenger *messenger, int friend_num, uint8_t status, void *session_p)
+{
+ (void)messenger;
+ MSISession *session = session_p;
+
+ switch ( status ) {
+ case 0: { /* Went offline */
+ int32_t j = 0;
+
+ for ( ; j < session->max_calls; j ++ ) {
+
+ if ( !session->calls[j] ) continue;
+
+ uint16_t i = 0;
+
+ for ( ; i < session->calls[j]->peer_count; i ++ )
+ if ( session->calls[j]->peers[i] == (uint32_t)friend_num ) {
+ invoke_callback(session, j, MSI_OnPeerTimeout);
+ terminate_call(session, session->calls[j]);
+ LOGGER_DEBUG("Remote: %d timed out!", friend_num);
+ return; /* TODO: On group calls change behaviour */
+ }
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+static MSICall *find_call ( MSISession *session, uint8_t *call_id )
+{
+ if ( call_id == NULL ) return NULL;
+
+ int32_t i = 0;
+
+ for (; i < session->max_calls; i ++ )
+ if ( session->calls[i] && memcmp(session->calls[i]->id, call_id, sizeof(session->calls[i]->id)) == 0 ) {
+ return session->calls[i];
+ }
+
+ return NULL;
+}
+
+/**
+ * @brief Sends error response to peer.
+ *
+ * @param session The session.
+ * @param errid The id.
+ * @param to Where to?
+ * @return int
+ * @retval -1/0 It's usually always success.
+ */
+static int send_error ( MSISession *session, MSICall *call, MSICallError errid, uint32_t to )
+{
+ if (!call) {
+ LOGGER_WARNING("Cannot handle error on 'null' call");
+ return -1;
+ }
+
+ LOGGER_DEBUG("Sending error: %d on call: %s", errid, call->id);
+
+ MSIMessage *msg_error = msi_new_message ( TypeResponse, error );
+
+ msi_msg_set_reason ( msg_error, stringify_error(errid) );
+ send_message ( session, call, msg_error, to );
+ free ( msg_error );
+
+ return 0;
+}
+
+
+
+/**
+ * @brief Add peer to peer list.
+ *
+ * @param call What call.
+ * @param peer_id Its id.
+ * @return void
+ */
+static void add_peer( MSICall *call, int peer_id )
+{
+ uint32_t *peers = !call->peers ? peers = calloc(sizeof(uint32_t), 1) :
+ realloc( call->peers, sizeof(uint32_t) * call->peer_count);
+
+ if (!peers) {
+ LOGGER_WARNING("Allocation failed! Program might misbehave!");
+ return;
+ }
+
+ call->peer_count ++;
+ call->peers = peers;
+ call->peers[call->peer_count - 1] = peer_id;
+
+ LOGGER_DEBUG("Added peer: %d", peer_id);
+}
+
+
+/**
+ * @brief Speaks for it self.
+ *
+ * @param session Control session.
+ * @param peers Amount of peers. (Currently it only supports 1)
+ * @param ringing_timeout Ringing timeout.
+ * @return MSICall* The created call.
+ */
+static MSICall *init_call ( MSISession *session, int peers, int ringing_timeout )
+{
+
+ if (peers == 0) {
+ LOGGER_ERROR("No peers!");
+ return NULL;
+ }
+
+ int32_t call_idx = 0;
+
+ for (; call_idx < session->max_calls; call_idx ++) {
+ if ( !session->calls[call_idx] ) {
+
+ if (!(session->calls[call_idx] = calloc ( sizeof ( MSICall ), 1 ))) {
+ LOGGER_WARNING("Allocation failed! Program might misbehave!");
+ return NULL;
+ }
+
+ break;
+ }
+ }
+
+ if ( call_idx == session->max_calls ) {
+ LOGGER_WARNING("Reached maximum amount of calls!");
+ return NULL;
+ }
+
+
+ MSICall *call = session->calls[call_idx];
+
+ call->call_idx = call_idx;
+
+ if ( !(call->csettings_peer = calloc ( sizeof ( MSICSettings ), peers )) ) {
+ LOGGER_WARNING("Allocation failed! Program might misbehave!");
+ free(call);
+ return NULL;
+ }
+
+ call->session = session;
+
+ call->request_timer_id = 0;
+ call->ringing_timer_id = 0;
+
+ call->ringing_tout_ms = ringing_timeout;
+
+ pthread_mutex_init ( &call->mutex, NULL );
+
+ LOGGER_DEBUG("Started new call with index: %u", call_idx);
+ return call;
+}
+
+
+/**
+ * @brief Terminate the call.
+ *
+ * @param session Control session.
+ * @return int
+ * @retval -1 Error occurred.
+ * @retval 0 Success.
+ */
+static int terminate_call ( MSISession *session, MSICall *call )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Tried to terminate non-existing call!");
+ return -1;
+ }
+
+ LOGGER_DEBUG("Terminated call id: %d", call->call_idx);
+ /* Check event loop and cancel timed events if there are any
+ * NOTE: This has to be done before possibly
+ * locking the mutex the second time
+ */
+ timer_release ( session->timer_handler, call->request_timer_id, 1);
+ timer_release ( session->timer_handler, call->ringing_timer_id, 1);
+
+ /* Get a handle */
+ pthread_mutex_lock ( &call->mutex );
+
+ session->calls[call->call_idx] = NULL;
+
+ free ( call->csettings_peer );
+ free ( call->peers);
+
+ /* Release handle */
+ pthread_mutex_unlock ( &call->mutex );
+
+ pthread_mutex_destroy ( &call->mutex );
+
+ free ( call );
+
+ return 0;
+}
+
+
+/**
+ * @brief Function called at request timeout. If not called in thread it might cause trouble
+ *
+ * @param arg Control session
+ * @return void*
+ */
+static void *handle_timeout ( void *arg )
+{
+ /* TODO: Cancel might not arrive there; set up
+ * timers on these cancels and terminate call on
+ * their timeout
+ */
+ struct timer_function_args *args = arg;
+ int call_index = args->arg2;
+ MSISession *session = args->arg1;
+ MSICall *call = session->calls[call_index];
+
+ if (call) {
+ LOGGER_DEBUG("[Call: %d] Request timed out!", call->call_idx);
+
+ invoke_callback(session, call_index, MSI_OnRequestTimeout);
+ }
+
+ if ( call && call->session ) {
+
+ /* TODO: Cancel all? */
+ /* uint16_t _it = 0;
+ * for ( ; _it < _session->call->peer_count; _it++ ) */
+ msi_cancel ( call->session, call->call_idx, call->peers [0], "Request timed out" );
+ /*terminate_call(call->session, call);*/
+ }
+
+ free(arg);
+ pthread_exit(NULL);
+}
+
+
+/********** Request handlers **********/
+static int handle_recv_invite ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ LOGGER_DEBUG("Session: %p Handling 'invite' on call: %d", session, call ? call->call_idx : -1);
+
+ pthread_mutex_lock(&session->mutex);
+
+ if (!msg->csettings.exists) {/**/
+ LOGGER_WARNING("Peer sent invalid codec settings!");
+ send_error ( session, call, error_no_callid, msg->friend_id );
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+ }
+
+ if ( call ) {
+ if ( call->peers[0] == (uint32_t)msg->friend_id ) {
+ if (call->state == call_inviting) {
+ /* The glare case. A calls B when at the same time
+ * B calls A. Who has advantage is set bey calculating
+ * 'bigger' Call id and then that call id is being used in
+ * future. User with 'bigger' Call id has the advantage
+ * as in he will wait the response from the other.
+ */
+ LOGGER_DEBUG("Glare case; Peer: %d", call->peers[0]);
+
+ if ( call_id_bigger (call->id, msg->callid.value) == 1 ) { /* Peer has advantage */
+
+ /* Terminate call; peer will timeout(call) if call initialization fails */
+ terminate_call(session, call);
+
+ call = init_call ( session, 1, 0 );
+
+ if ( !call ) {
+ pthread_mutex_unlock(&session->mutex);
+ LOGGER_ERROR("Starting call");
+ return 0;
+ }
+
+ } else {
+ pthread_mutex_unlock(&session->mutex);
+ return 0; /* Wait for ringing from peer */
+ }
+ } else if (call->state == call_active) {
+ /* Request for media change; call callback and send starting response */
+ if (flush_peer_csettings(call, msg, 0) != 0) { /**/
+ LOGGER_WARNING("Peer sent invalid csetting!");
+ send_error ( session, call, error_no_callid, msg->friend_id );
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+ }
+
+ LOGGER_DEBUG("Set new call type: %s", call->csettings_peer[0].call_type == type_audio ? "audio" : "video");
+ send_reponse(session, call, starting, msg->friend_id);
+ pthread_mutex_unlock(&session->mutex);
+ invoke_callback(session, call->call_idx, MSI_OnMediaChange);
+ return 1;
+ }
+ } else {
+ send_error ( session, call, error_busy, msg->friend_id ); /* TODO: Ugh*/
+ terminate_call(session, call);
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+ }
+ } else {
+ call = init_call ( session, 1, 0 );
+
+ if ( !call ) {
+ pthread_mutex_unlock(&session->mutex);
+ LOGGER_ERROR("Starting call");
+ return 0;
+ }
+ }
+
+ if ( !msg->callid.exists ) {
+ send_error ( session, call, error_no_callid, msg->friend_id );
+ terminate_call(session, call);
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+ }
+
+ memcpy ( call->id, msg->callid.value, sizeof(msg->callid.value) );
+ call->state = call_starting;
+
+ add_peer( call, msg->friend_id);
+
+ flush_peer_csettings ( call, msg, 0 );
+
+ send_reponse(session, call, ringing, msg->friend_id);
+
+ pthread_mutex_unlock(&session->mutex);
+
+ invoke_callback(session, call->call_idx, MSI_OnInvite);
+
+ return 1;
+}
+
+static int handle_recv_start ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'start' on no call");
+ return 0;
+ }
+
+ (void)msg;
+
+ LOGGER_DEBUG("Session: %p Handling 'start' on call: %d, friend id: %d", session, call->call_idx, msg->friend_id );
+
+ pthread_mutex_lock(&session->mutex);
+
+ call->state = call_active;
+
+ pthread_mutex_unlock(&session->mutex);
+
+ invoke_callback(session, call->call_idx, MSI_OnStart);
+ return 1;
+}
+
+static int handle_recv_reject ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'start' on no call");
+ return 0;
+ }
+
+ LOGGER_DEBUG("Session: %p Handling 'reject' on call: %u", session, call->call_idx);
+
+ invoke_callback(session, call->call_idx, MSI_OnReject);
+
+ pthread_mutex_lock(&session->mutex);
+
+ send_reponse(session, call, ending, msg->friend_id);
+ terminate_call(session, call);
+
+ pthread_mutex_unlock(&session->mutex);
+
+ return 1;
+}
+
+static int handle_recv_cancel ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'start' on no call");
+ return 0;
+ }
+
+ (void)msg;
+
+ LOGGER_DEBUG("Session: %p Handling 'cancel' on call: %u", session, call->call_idx);
+
+ invoke_callback(session, call->call_idx, MSI_OnCancel);
+
+ pthread_mutex_lock(&session->mutex);
+
+ terminate_call ( session, call );
+
+ pthread_mutex_unlock(&session->mutex);
+
+ return 1;
+}
+
+static int handle_recv_end ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'start' on no call");
+ return 0;
+ }
+
+ LOGGER_DEBUG("Session: %p Handling 'end' on call: %d", session, call->call_idx);
+
+ invoke_callback(session, call->call_idx, MSI_OnEnd);
+ pthread_mutex_lock(&session->mutex);
+
+ send_reponse(session, call, ending, msg->friend_id);
+ terminate_call ( session, call );
+
+ pthread_mutex_unlock(&session->mutex);
+
+
+ return 1;
+}
+
+/********** Response handlers **********/
+static int handle_recv_ringing ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'start' on no call");
+ return 0;
+ }
+
+ (void)msg;
+
+ pthread_mutex_lock(&session->mutex);
+
+ if ( call->ringing_timer_id ) {
+ LOGGER_WARNING("Call already ringing");
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+ }
+
+ LOGGER_DEBUG("Session: %p Handling 'ringing' on call: %d", session, call->call_idx );
+
+ call->ringing_timer_id = timer_alloc ( session->timer_handler, handle_timeout, session, call->call_idx,
+ call->ringing_tout_ms );
+
+ pthread_mutex_unlock(&session->mutex);
+
+ invoke_callback(session, call->call_idx, MSI_OnRinging);
+ return 1;
+}
+static int handle_recv_starting ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'starting' on non-existing call");
+ return 0;
+ }
+
+ pthread_mutex_lock(&session->mutex);
+
+ if ( call->state == call_active ) { /* Change media */
+
+ LOGGER_DEBUG("Session: %p Changing media on call: %d", session, call->call_idx );
+ pthread_mutex_unlock(&session->mutex);
+
+ invoke_callback(session, call->call_idx, MSI_OnMediaChange);
+
+ } else if ( call->state == call_inviting ) {
+ LOGGER_DEBUG("Session: %p Handling 'starting' on call: %d", session, call->call_idx );
+
+ call->state = call_active;
+
+ MSIMessage *msg_start = msi_new_message ( TypeRequest, start );
+ send_message ( session, call, msg_start, msg->friend_id );
+ free ( msg_start );
+
+
+ flush_peer_csettings ( call, msg, 0 );
+
+ /* This is here in case of glare */
+ timer_release ( session->timer_handler, call->ringing_timer_id, 1 );
+
+ pthread_mutex_unlock(&session->mutex);
+
+ invoke_callback(session, call->call_idx, MSI_OnStarting);
+ } else {
+ LOGGER_ERROR("Invalid call state");
+ terminate_call(session, call );
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+ }
+
+ return 1;
+}
+static int handle_recv_ending ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+ if ( !call ) {
+ LOGGER_WARNING("Session: %p Handling 'start' on no call");
+ return 0;
+ }
+
+ (void)msg;
+
+ LOGGER_DEBUG("Session: %p Handling 'ending' on call: %d", session, call->call_idx );
+
+ invoke_callback(session, call->call_idx, MSI_OnEnding);
+
+ /* Terminate call */
+ pthread_mutex_lock(&session->mutex);
+ terminate_call ( session, call );
+ pthread_mutex_unlock(&session->mutex);
+
+ return 1;
+}
+static int handle_recv_error ( MSISession *session, MSICall *call, MSIMessage *msg )
+{
+
+ if ( !call ) {
+ LOGGER_WARNING("Handling 'error' on non-existing call!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ LOGGER_DEBUG("Session: %p Handling 'error' on call: %d", session, call->call_idx );
+
+ invoke_callback(session, call->call_idx, MSI_OnEnding);
+
+ pthread_mutex_lock(&session->mutex);
+
+ /* Handle error accordingly */
+ if ( msg->reason.exists ) {
+ /* TODO */
+ }
+
+ terminate_call ( session, call );
+
+ pthread_mutex_unlock(&session->mutex);
+
+ return 1;
+}
+
+
+/**
+ * @brief BASIC call flow:
+ *
+ * ALICE BOB
+ * | invite --> |
+ * | |
+ * | <-- ringing |
+ * | |
+ * | <-- starting |
+ * | |
+ * | start --> |
+ * | |
+ * | <-- MEDIA TRANS --> |
+ * | |
+ * | end --> |
+ * | |
+ * | <-- ending |
+ *
+ * Alice calls Bob by sending invite packet.
+ * Bob recvs the packet and sends an ringing packet;
+ * which notifies Alice that her invite is acknowledged.
+ * Ringing screen shown on both sides.
+ * Bob accepts the invite for a call by sending starting packet.
+ * Alice recvs the starting packet and sends the started packet to
+ * inform Bob that she recved the starting packet.
+ * Now the media transmission is established ( i.e. RTP transmission ).
+ * Alice hangs up and sends end packet.
+ * Bob recves the end packet and sends ending packet
+ * as the acknowledgement that the call is ending.
+ *
+ *
+ */
+static void msi_handle_packet ( Messenger *messenger, int source, const uint8_t *data, uint16_t length, void *object )
+{
+ LOGGER_DEBUG("Got msi message");
+ /* Unused */
+ (void)messenger;
+
+ MSISession *session = object;
+ MSIMessage *msg;
+
+ if ( !length ) {
+ LOGGER_WARNING("Lenght param negative");
+ return;
+ }
+
+ msg = parse_recv ( data, length );
+
+ if ( !msg ) {
+ LOGGER_WARNING("Error parsing message");
+ return;
+ } else {
+ LOGGER_DEBUG("Successfully parsed message");
+ }
+
+ msg->friend_id = source;
+
+
+ /* Find what call */
+ MSICall *call = msg->callid.exists ? find_call(session, msg->callid.value ) : NULL;
+
+ /* Now handle message */
+
+ if ( msg->request.exists ) { /* Handle request */
+
+ switch (msg->request.value) {
+ case invite:
+ handle_recv_invite ( session, call, msg );
+ break;
+
+ case start:
+ handle_recv_start ( session, call, msg );
+ break;
+
+ case cancel:
+ handle_recv_cancel ( session, call, msg );
+ break;
+
+ case reject:
+ handle_recv_reject ( session, call, msg );
+ break;
+
+ case end:
+ handle_recv_end ( session, call, msg );
+ break;
+ }
+
+ } else if ( msg->response.exists ) { /* Handle response */
+
+ /* Got response so cancel timer */
+ if ( call ) timer_release ( session->timer_handler, call->request_timer_id, 1 );
+
+ switch (msg->response.value) {
+ case ringing:
+ handle_recv_ringing ( session, call, msg );
+ break;
+
+ case starting:
+ handle_recv_starting ( session, call, msg );
+ break;
+
+ case ending:
+ handle_recv_ending ( session, call, msg );
+ break;
+
+ case error:
+ handle_recv_error ( session, call, msg );
+ break;
+ }
+
+ } else {
+ LOGGER_WARNING("Invalid message: no resp nor requ headers");
+ }
+
+ free ( msg );
+}
+
+
+/**
+ * @brief Callback setter.
+ *
+ * @param callback The callback.
+ * @param id The id.
+ * @return void
+ */
+void msi_register_callback ( MSISession *session, MSICallbackType callback, MSICallbackID id, void *userdata )
+{
+ session->callbacks[id].function = callback;
+ session->callbacks[id].data = userdata;
+}
+
+
+/**
+ * @brief Start the control session.
+ *
+ * @param messenger Tox* object.
+ * @param max_calls Amount of calls possible
+ * @return MSISession* The created session.
+ * @retval NULL Error occurred.
+ */
+MSISession *msi_init_session ( Messenger *messenger, int32_t max_calls )
+{
+ if (messenger == NULL) {
+ LOGGER_ERROR("Could not init session on empty messenger!");
+ return NULL;
+ }
+
+ TimerHandler *handler = timer_init_session(max_calls * 10, 10000);
+
+ if ( !max_calls || !handler ) {
+ LOGGER_WARNING("Invalid max call treshold or timer handler initialization failed!");
+ return NULL;
+ }
+
+ MSISession *retu = calloc ( sizeof ( MSISession ), 1 );
+
+ if (retu == NULL) {
+ LOGGER_ERROR("Allocation failed! Program might misbehave!");
+ return NULL;
+ }
+
+ retu->messenger_handle = messenger;
+ retu->agent_handler = NULL;
+ retu->timer_handler = handler;
+
+ if (!(retu->calls = calloc( sizeof (MSICall *), max_calls ))) {
+ LOGGER_ERROR("Allocation failed! Program might misbehave!");
+ free(retu);
+ return NULL;
+ }
+
+ retu->max_calls = max_calls;
+
+ retu->frequ = 10000; /* default value? */
+ retu->call_timeout = 30000; /* default value? */
+
+
+ m_callback_msi_packet(messenger, msi_handle_packet, retu );
+
+ /* This is called when remote terminates session */
+ m_callback_connectionstatus_internal_av(messenger, handle_remote_connection_change, retu);
+
+ pthread_mutex_init(&retu->mutex, NULL);
+
+ LOGGER_DEBUG("New msi session: %p max calls: %u", retu, max_calls);
+ return retu;
+}
+
+
+/**
+ * @brief Terminate control session.
+ *
+ * @param session The session
+ * @return int
+ */
+int msi_terminate_session ( MSISession *session )
+{
+ if (session == NULL) {
+ LOGGER_ERROR("Tried to terminate non-existing session");
+ return -1;
+ }
+
+ pthread_mutex_lock(&session->mutex);
+ m_callback_msi_packet((struct Messenger *) session->messenger_handle, NULL, NULL);
+ pthread_mutex_unlock(&session->mutex);
+
+ int _status = 0;
+
+ /* If have calls, cancel them */
+ int32_t idx = 0;
+
+ for (; idx < session->max_calls; idx ++) if ( session->calls[idx] ) {
+ /* Cancel all? */
+ uint16_t _it = 0;
+ /*for ( ; _it < session->calls[idx]->peer_count; _it++ )
+ * FIXME: will not work on multiple peers, must cancel call for all peers
+ */
+ msi_cancel ( session, idx, session->calls[idx]->peers [_it], "MSI session terminated!" );
+ }
+
+ timer_terminate_session(session->timer_handler);
+
+ pthread_mutex_destroy(&session->mutex);
+
+ LOGGER_DEBUG("Terminated session: %p", session);
+ free ( session );
+ return _status;
+}
+
+
+/**
+ * @brief Send invite request to friend_id.
+ *
+ * @param session Control session.
+ * @param call_type Type of the call. Audio or Video(both audio and video)
+ * @param rngsec Ringing timeout.
+ * @param friend_id The friend.
+ * @return int
+ */
+int msi_invite ( MSISession *session, int32_t *call_index, MSICSettings csettings, uint32_t rngsec, uint32_t friend_id )
+{
+ pthread_mutex_lock(&session->mutex);
+
+ LOGGER_DEBUG("Session: %p Inviting friend: %u", session, friend_id);
+
+
+ int i = 0;
+
+ for (; i < session->max_calls; i ++)
+ if (session->calls[i] && session->calls[i]->peers[0] == friend_id) {
+ LOGGER_ERROR("Already in a call with friend %d", friend_id);
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+
+ MSICall *call = init_call ( session, 1, rngsec ); /* Just one peer for now */
+
+ if ( !call ) {
+ pthread_mutex_unlock(&session->mutex);
+ LOGGER_ERROR("Cannot handle more calls");
+ return -1;
+ }
+
+ *call_index = call->call_idx;
+
+ t_randomstr ( call->id, sizeof(call->id) );
+
+ add_peer ( call, friend_id );
+
+ call->csettings_local = csettings;
+
+ MSIMessage *msg_invite = msi_new_message ( TypeRequest, invite );
+
+ msi_msg_set_csettings(msg_invite, &csettings);
+ send_message ( session, call, msg_invite, friend_id );
+ free( msg_invite );
+
+ call->state = call_inviting;
+
+ call->request_timer_id = timer_alloc ( session->timer_handler, handle_timeout, session, call->call_idx, m_deftout );
+
+ LOGGER_DEBUG("Invite sent");
+
+ pthread_mutex_unlock(&session->mutex);
+
+ return 0;
+}
+
+
+/**
+ * @brief Hangup active call.
+ *
+ * @param session Control session.
+ * @param call_id To which call is this action handled.
+ * @return int
+ * @retval -1 Error occurred.
+ * @retval 0 Success.
+ */
+int msi_hangup ( MSISession *session, int32_t call_index )
+{
+ pthread_mutex_lock(&session->mutex);
+ LOGGER_DEBUG("Session: %p Hanging up call: %u", session, call_index);
+
+ if ( call_index < 0 || call_index >= session->max_calls || !session->calls[call_index] ) {
+ LOGGER_ERROR("Invalid call index!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ if ( session->calls[call_index]->state != call_active ) {
+ LOGGER_ERROR("No call with such index or call is not active!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ MSIMessage *msg_end = msi_new_message ( TypeRequest, end );
+
+ /* hangup for each peer */
+ int it = 0;
+
+ for ( ; it < session->calls[call_index]->peer_count; it ++ )
+ send_message ( session, session->calls[call_index], msg_end, session->calls[call_index]->peers[it] );
+
+ session->calls[call_index]->state = call_hanged_up;
+
+ free ( msg_end );
+
+ session->calls[call_index]->request_timer_id =
+ timer_alloc ( session->timer_handler, handle_timeout, session, call_index, m_deftout );
+
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+}
+
+
+/**
+ * @brief Answer active call request.
+ *
+ * @param session Control session.
+ * @param call_id To which call is this action handled.
+ * @param call_type Answer with Audio or Video(both).
+ * @return int
+ */
+int msi_answer ( MSISession *session, int32_t call_index, MSICSettings csettings )
+{
+ pthread_mutex_lock(&session->mutex);
+ LOGGER_DEBUG("Session: %p Answering call: %u", session, call_index);
+
+ if ( call_index < 0 || call_index >= session->max_calls || !session->calls[call_index] ) {
+ LOGGER_ERROR("Invalid call index!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ MSIMessage *msg_starting = msi_new_message ( TypeResponse, starting );
+
+ session->calls[call_index]->csettings_local = csettings;
+
+ msi_msg_set_csettings(msg_starting, &csettings);
+
+ send_message ( session, session->calls[call_index], msg_starting, session->calls[call_index]->peers[0] );
+ free ( msg_starting );
+
+ session->calls[call_index]->state = call_active;
+
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+}
+
+
+/**
+ * @brief Cancel request.
+ *
+ * @param session Control session.
+ * @param call_id To which call is this action handled.
+ * @param reason Set optional reason header. Pass NULL if none.
+ * @return int
+ */
+int msi_cancel ( MSISession *session, int32_t call_index, uint32_t peer, const char *reason )
+{
+ pthread_mutex_lock(&session->mutex);
+ LOGGER_DEBUG("Session: %p Canceling call: %u; reason: %s", session, call_index, reason ? reason : "Unknown");
+
+ if ( call_index < 0 || call_index >= session->max_calls || !session->calls[call_index] ) {
+ LOGGER_ERROR("Invalid call index!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ MSIMessage *msg_cancel = msi_new_message ( TypeRequest, cancel );
+
+ /* FIXME */
+#if 0
+
+ if ( reason && strlen(reason) < sizeof(MSIReasonStrType) ) {
+ MSIReasonStrType reason_cast;
+ memset(reason_cast, '\0', sizeof(MSIReasonStrType));
+ memcpy(reason_cast, reason, strlen(reason));
+ msi_msg_set_reason(msg_cancel, reason_cast);
+ }
+
+#else
+ (void)reason;
+
+#endif
+
+ send_message ( session, session->calls[call_index], msg_cancel, peer );
+ free ( msg_cancel );
+
+ terminate_call ( session, session->calls[call_index] );
+ pthread_mutex_unlock(&session->mutex);
+
+ return 0;
+}
+
+
+/**
+ * @brief Reject request.
+ *
+ * @param session Control session.
+ * @param call_id To which call is this action handled.
+ * @return int
+ */
+int msi_reject ( MSISession *session, int32_t call_index, const char *reason )
+{
+ pthread_mutex_lock(&session->mutex);
+ LOGGER_DEBUG("Session: %p Rejecting call: %u; reason: %s", session, call_index, reason ? reason : "Unknown");
+
+ if ( call_index < 0 || call_index >= session->max_calls || !session->calls[call_index] ) {
+ LOGGER_ERROR("Invalid call index!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ MSIMessage *msg_reject = msi_new_message ( TypeRequest, reject );
+
+ /* FIXME */
+#if 0
+
+ if ( reason && strlen(reason) < sizeof(MSIReasonStrType) ) {
+ MSIReasonStrType reason_cast;
+ memset(reason_cast, '\0', sizeof(MSIReasonStrType));
+ memcpy(reason_cast, reason, strlen(reason));
+ msi_msg_set_reason(msg_reject, reason_cast);
+ }
+
+#else
+ (void)reason;
+
+#endif
+
+ send_message ( session, session->calls[call_index], msg_reject,
+ session->calls[call_index]->peers[session->calls[call_index]->peer_count - 1] );
+ free ( msg_reject );
+
+ session->calls[call_index]->state = call_hanged_up;
+ session->calls[call_index]->request_timer_id =
+ timer_alloc ( session->timer_handler, handle_timeout, session, call_index, m_deftout );
+
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+}
+
+
+/**
+ * @brief Send invite request to friend_id.
+ *
+ * @param session Control session.
+ * @param call_index Call index.
+ * @param call_type Type of the call. Audio or Video(both audio and video)
+ * @param rngsec Ringing timeout.
+ * @param friend_id The friend.
+ * @return int
+ */
+int msi_change_csettings(MSISession *session, int32_t call_index, MSICSettings csettings)
+{
+ pthread_mutex_lock(&session->mutex);
+
+ LOGGER_DEBUG("Changing media on call: %d", call_index);
+
+ if ( call_index < 0 || call_index >= session->max_calls || !session->calls[call_index] ) {
+ LOGGER_ERROR("Invalid call index!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ MSICall *call = session->calls[call_index];
+
+ if ( call->state != call_active ) {
+ LOGGER_ERROR("Call is not active!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ MSICSettings *local = &call->csettings_local;
+
+ if (
+ local->call_type == csettings.call_type &&
+ local->video_bitrate == csettings.video_bitrate &&
+ local->max_video_width == csettings.max_video_width &&
+ local->max_video_height == csettings.max_video_height &&
+ local->audio_bitrate == csettings.audio_bitrate &&
+ local->audio_frame_duration == csettings.audio_frame_duration &&
+ local->audio_sample_rate == csettings.audio_sample_rate &&
+ local->audio_channels == csettings.audio_channels ) {
+ LOGGER_ERROR("Call is already set accordingly!");
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ *local = csettings;
+
+ MSIMessage *msg_invite = msi_new_message ( TypeRequest, invite );
+
+ msi_msg_set_csettings ( msg_invite, local );
+ send_message ( session, call, msg_invite, call->peers[0] );
+ free ( msg_invite );
+
+ LOGGER_DEBUG("Request for media change sent");
+
+ pthread_mutex_unlock(&session->mutex);
+
+ return 0;
+}
+
+
+/**
+ * @brief Terminate the current call.
+ *
+ * @param session Control session.
+ * @param call_id To which call is this action handled.
+ * @return int
+ */
+int msi_stopcall ( MSISession *session, int32_t call_index )
+{
+ pthread_mutex_lock(&session->mutex);
+ LOGGER_DEBUG("Session: %p Stopping call index: %u", session, call_index);
+
+ if ( call_index < 0 || call_index >= session->max_calls || !session->calls[call_index] ) {
+ pthread_mutex_unlock(&session->mutex);
+ return -1;
+ }
+
+ /* just terminate it */
+
+ terminate_call ( session, session->calls[call_index] );
+
+ pthread_mutex_unlock(&session->mutex);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-29 21:10:13 +0000