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doubango/tinyBFCP/src/tbfcp_session.c

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/* Copyright (C) 2014 Mamadou DIOP.
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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.
*
* DOUBANGO 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
#include "tinybfcp/tbfcp_session.h"
#include "tinybfcp/tbfcp_pkt.h"
#include "tinybfcp/tbfcp_utils.h"
#include "tsk_time.h"
#include "tsk_timer.h"
#include "tsk_object.h"
#include "tsk_memory.h"
#include "tsk_safeobj.h"
#include "tsk_debug.h"
typedef struct tbfcp_udp_pkt_s {
TSK_DECLARE_OBJECT;
struct {
tsk_timer_id_t u_id;
uint64_t u_timeout;
} timer;
tbfcp_pkt_t *p_pkt;
} tbfcp_udp_pkt_t;
typedef tsk_list_t tbfcp_udp_pkts_L_t;
typedef struct tbfcp_session_s {
TSK_DECLARE_OBJECT;
tsk_bool_t b_started;
tsk_bool_t b_stopping;
tsk_bool_t b_prepared;
tbfcp_udp_pkts_L_t *p_list_udp_pkts;
struct {
tbfcp_session_callback_f f_fun;
struct tbfcp_session_event_xs e;
} cb;
// Values received from the server in the 200 OK. Attributes from rfc4583
struct {
uint32_t u_conf_id;
uint16_t u_user_id;
uint16_t u_floor_id;
}
conf_ids;
enum tbfcp_role_e e_role_local;
enum tbfcp_role_e e_role_remote;
enum tbfcp_setup_e e_setup_local;
enum tbfcp_setup_e e_setup_remote;
enum tnet_socket_type_e e_socket_type;
char* p_local_ip;
tnet_port_t u_local_port;
char* p_local_public_ip;
tnet_port_t u_local_public_port;
char* p_remote_ip;
tnet_port_t u_remote_port;
struct sockaddr_storage remote_addr;
struct tnet_nat_ctx_s* p_natt_ctx;
struct tnet_ice_ctx_s* p_ice_ctx;
struct tnet_transport_s* p_transport;
uint8_t* p_buff_send_ptr;
tsk_size_t u_buff_send_size;
struct {
tsk_timer_manager_handle_t* ph_global;
tsk_timer_id_t id_T1; // For UDP only
uint64_t u_timeout_T1;
tsk_timer_id_t id_T2; // For UDP only
uint64_t u_timeout_T2;
tsk_timer_id_t id_TcpReconnect; // For TCP/TLS only
uint64_t u_timeout_TcpReconnect;
} timer;
TSK_DECLARE_SAFEOBJ;
} tbfcp_session_t;
typedef enum _bfcp_timer_type_e {
_bfcp_timer_type_T1, // draft-ietf-bfcpbis-rfc4582bis-11 - 4.16. Timer Values (8.3.3) - Initial request retransmission timer (0.5s)
_bfcp_timer_type_T2, // draft-ietf-bfcpbis-rfc4582bis-11 - 4.16. Timer Values (8.3.3) - Response retransmission timer (10s)
_bfcp_timer_type_TcpReconnect, // Try to reconnect the TCP/TLS socket every X seconds if unexpectedly disconnected
}
_bfcp_timer_type_t;
static int _tbfcp_udp_pkt_create(const tbfcp_pkt_t *pc_pkt, tbfcp_udp_pkt_t** pp_pkt);
static int _tbfcp_session_send_pkt(tbfcp_session_t* p_self, const tbfcp_pkt_t* pc_pkt);
static int _tbfcp_session_send_Hello(struct tbfcp_session_s* p_self);
static int _tbfcp_session_send_HelloAck(struct tbfcp_session_s* p_self, const tbfcp_pkt_t *pc_hello);
static int _tbfcp_session_send_FloorRequest(struct tbfcp_session_s* p_self);
static int _tbfcp_session_process_incoming_pkt(struct tbfcp_session_s* p_self, const tbfcp_pkt_t *pc_pkt);
static int _tbfcp_session_socket_type_make_valid(enum tnet_socket_type_e e_in_st, enum tnet_socket_type_e *pe_out_st);
static int _tbfcp_session_timer_callback(const void* pc_arg, tsk_timer_id_t timer_id);
static int _tbfcp_session_timer_schedule(struct tbfcp_session_s* p_self, _bfcp_timer_type_t e_timer, uint64_t u_timeout);
static int _tbfcp_session_transport_layer_dgram_cb(const tnet_transport_event_t* e);
static int _tbfcp_session_transport_layer_stream_cb(const tnet_transport_event_t* e);
#define _tbfcp_session_raise(_p_self, _e_type, _pc_pkt) \
if ((_p_self)->cb.f_fun) { \
(_p_self)->cb.e.e_type = (_e_type); \
(_p_self)->cb.e.pc_pkt = (_pc_pkt); \
(_p_self)->cb.f_fun(&_p_self->cb.e); \
}
#define _tbfcp_session_raise_inf_inc_msg(_p_self, _pc_pkt) _tbfcp_session_raise(_p_self, tbfcp_session_event_type_inf_inc_msg, _pc_pkt)
#define _tbfcp_session_raise_err_send_timedout(_p_self, _pc_pkt) _tbfcp_session_raise(_p_self, tbfcp_session_event_type_err_send_timedout, _pc_pkt)
static int __pred_find_udp_pkt_by_timer(const tsk_list_item_t *item, const void *u64_id)
{
if (item && item->data) {
return (int)(((const struct tbfcp_udp_pkt_s *)item->data)->timer.u_id - *((const uint64_t*)u64_id));
}
return -1;
}
static int __pred_find_udp_pkt_by_transac_id(const tsk_list_item_t *item, const void *u16_transac_id)
{
if (item && item->data) {
return (int)(((const struct tbfcp_udp_pkt_s *)item->data)->p_pkt->hdr.transac_id - *((const uint16_t*)u16_transac_id));
}
return -1;
}
int tbfcp_session_create(tnet_socket_type_t e_socket_type, const char* pc_local_ip, tbfcp_session_t** pp_self)
{
extern const tsk_object_def_t *tbfcp_session_def_t;
int ret;
tnet_socket_type_t e_st;
tbfcp_session_t* p_self;
if (!pp_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if ((ret = _tbfcp_session_socket_type_make_valid(e_socket_type, &e_st))) {
return ret;
}
if (!(p_self = tsk_object_new(tbfcp_session_def_t))) {
TSK_DEBUG_ERROR("Failed to create 'tbfcp_session_def_t' object");
return -2;
}
p_self->e_socket_type = e_st;
tsk_strupdate(&p_self->p_local_ip, pc_local_ip);
*pp_self = p_self;
return 0;
}
int tbfcp_session_create_2(struct tnet_ice_ctx_s* p_ice_ctx, tbfcp_session_t** pp_self)
{
tnet_socket_type_t e_st;
const char* pc_local_ip;
int ret;
if (!pp_self || !p_ice_ctx) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// TODO: ICE expect RTP and RTCP comp-ids only
TSK_DEBUG_ERROR("Not supported yet");
return -2;
// TODO: For now ICE works with UDP (and DTLS) only
e_st = tnet_ice_ctx_use_ipv6(p_ice_ctx) ? tnet_socket_type_udp_ipv4 : tnet_socket_type_udp_ipv6;
pc_local_ip = tnet_ice_ctx_use_ipv6(p_ice_ctx) ? "::1" : "127.0.0.1";
if ((ret = _tbfcp_session_socket_type_make_valid(e_st, &e_st))) {
return ret;
}
if ((ret = tbfcp_session_create(e_st, pc_local_ip, pp_self))) {
return ret;
}
(*pp_self)->p_ice_ctx = tsk_object_ref(p_ice_ctx);
return 0;
}
int tbfcp_session_set_callback(struct tbfcp_session_s* p_self, tbfcp_session_callback_f f_fun, const void* pc_usr_data)
{
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
p_self->cb.f_fun = f_fun;
p_self->cb.e.pc_usr_data = pc_usr_data;
return 0;
}
int tbfcp_session_set_ice_ctx(tbfcp_session_t* p_self, struct tnet_ice_ctx_s* p_ice_ctx)
{
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
TSK_OBJECT_SAFE_FREE(p_self->p_ice_ctx);
if (p_ice_ctx) {
p_self->p_ice_ctx = tsk_object_ref(p_ice_ctx);
}
return 0;
}
int tbfcp_session_prepare(tbfcp_session_t* p_self)
{
int ret = 0;
const char *bfcp_local_ip;
tnet_port_t bfcp_local_port;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if (p_self->b_prepared) {
TSK_DEBUG_INFO("BFCP session already prepared");
goto bail;
}
if (p_self->p_transport) {
TSK_DEBUG_ERROR("BFCP session already has a transport. Unexpected.");
ret = -2;
goto bail;
}
bfcp_local_ip = TNET_SOCKET_HOST_ANY;
bfcp_local_port = TNET_SOCKET_PORT_ANY;
/*if (p_self->p_ice_ctx) {
// Get Sockets when the transport is started
bfcp_local_ip = tnet_ice_ctx_use_ipv6(p_self->p_ice_ctx) ? "::1" : "127.0.0.1";
}
else*/ {
// create transport
if (!p_self->p_transport && !(p_self->p_transport = tnet_transport_create(p_self->p_local_ip, p_self->u_local_port, p_self->e_socket_type, kBfcpTransportFriendlyName))) {
TSK_DEBUG_ERROR("Failed to create %s Transport", kBfcpTransportFriendlyName);
return -3;
}
// set transport callback
if ((ret = tnet_transport_set_callback(p_self->p_transport, TNET_SOCKET_TYPE_IS_DGRAM(p_self->e_socket_type) ? _tbfcp_session_transport_layer_dgram_cb : _tbfcp_session_transport_layer_stream_cb, p_self))) {
goto bail;
}
bfcp_local_ip = p_self->p_transport->master->ip;
bfcp_local_port = p_self->p_transport->master->port;
}
tsk_strupdate(&p_self->p_local_public_ip, bfcp_local_ip);
p_self->u_local_public_port = bfcp_local_port;
p_self->b_prepared = tsk_true;
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_start(tbfcp_session_t* p_self)
{
int ret;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if (p_self->b_started) {
TSK_DEBUG_INFO("BFCP session already started");
ret = 0;
goto bail;
}
if (!p_self->b_prepared) {
TSK_DEBUG_ERROR("BFCP session not prepared yet");
ret = -2;
goto bail;
}
// start global timer manager - nothing will be done if already started by another component
if ((ret = tsk_timer_manager_start(p_self->timer.ph_global))) {
TSK_DEBUG_ERROR("Failed to start timer");
goto bail;
}
// check remote IP address validity
if ((tsk_striequals(p_self->p_remote_ip, "0.0.0.0") || tsk_striequals(p_self->p_remote_ip, "::"))) { // most likely loopback testing
tnet_ip_t source = {0};
tsk_bool_t updated = tsk_false;
if (p_self->p_transport && p_self->p_transport->master) {
updated = (tnet_getbestsource(p_self->p_transport->master->ip, p_self->p_transport->master->port, p_self->p_transport->master->type, &source) == 0);
}
// Not allowed to send data to "0.0.0.0"
TSK_DEBUG_INFO("BFCP remote IP contains not allowed value ...changing to '%s'", updated ? source : "oops");
if (updated) {
tsk_strupdate(&p_self->p_remote_ip, source);
}
}
// init remote remote addr
if ((ret = tnet_sockaddr_init(p_self->p_remote_ip, p_self->u_remote_port, p_self->p_transport->master->type, &p_self->remote_addr))) {
tnet_transport_shutdown(p_self->p_transport);
TSK_OBJECT_SAFE_FREE(p_self->p_transport);
TSK_DEBUG_ERROR("Invalid BFCP host:port [%s:%u]", p_self->p_remote_ip, p_self->u_remote_port);
goto bail;
}
if ((ret = tnet_transport_set_natt_ctx(p_self->p_transport, p_self->p_natt_ctx))) {
TSK_DEBUG_ERROR("Failed to start to set NATT ctx for the %s transport", kBfcpTransportFriendlyName);
goto bail;
}
// start the transport
if ((ret = tnet_transport_start(p_self->p_transport))) {
TSK_DEBUG_ERROR("Failed to start the %s transport", kBfcpTransportFriendlyName);
goto bail;
}
p_self->b_started = tsk_true;
// Send hello now if UDP/DTLS. Otherwise (TCP/TLS), wait for the connection to complete.
//if (TNET_SOCKET_TYPE_IS_DGRAM(p_self->e_socket_type)) {
// if ((ret = _tbfcp_session_send_Hello(p_self))) {
// goto bail;
// }
//}
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_pause(tbfcp_session_t* p_self)
{
int ret = 0;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
goto bail;
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_stop(tbfcp_session_t* p_self)
{
int ret = 0;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// FIXME: send FloorRelease if a FloorRequest is pending
// lock()
tsk_safeobj_lock(p_self);
// stop the session if not already done
if (!p_self->b_started) {
TSK_DEBUG_INFO("BFCP session already stopped");
goto bail;
}
// remove all pending udp packets
tsk_list_clear_items(p_self->p_list_udp_pkts);
p_self->b_stopping = tsk_true;
// this is a global timer shared by many components -> stopping it won't remove
// all scheduled items as it could continue running if still used
if (TSK_TIMER_ID_IS_VALID(p_self->timer.id_T1)) {
tsk_timer_manager_cancel(p_self->timer.ph_global, p_self->timer.id_T1);
p_self->timer.id_T1 = TSK_INVALID_TIMER_ID;
}
if (TSK_TIMER_ID_IS_VALID(p_self->timer.id_T2)) {
tsk_timer_manager_cancel(p_self->timer.ph_global, p_self->timer.id_T2);
p_self->timer.id_T2 = TSK_INVALID_TIMER_ID;
}
if (TSK_TIMER_ID_IS_VALID(p_self->timer.id_TcpReconnect)) {
tsk_timer_manager_cancel(p_self->timer.ph_global, p_self->timer.id_TcpReconnect);
p_self->timer.id_TcpReconnect = TSK_INVALID_TIMER_ID;
}
// free transport to force next call to start() to create new one with new sockets
if (p_self->p_transport) {
tnet_transport_shutdown(p_self->p_transport);
TSK_OBJECT_SAFE_FREE(p_self->p_transport);
}
p_self->b_started = tsk_false;
p_self->b_stopping = tsk_false;
p_self->b_prepared = tsk_false;
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_set_natt_ctx(tbfcp_session_t* p_self, struct tnet_nat_ctx_s* p_natt_ctx)
{
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
TSK_OBJECT_SAFE_FREE(p_self->p_natt_ctx);
p_self->p_natt_ctx = tsk_object_ref(p_natt_ctx);
return 0;
}
int tbfcp_session_set_remote_address(tbfcp_session_t* p_self, const char* pc_ip, tnet_port_t u_port)
{
if (!p_self || !pc_ip /*|| u_port < 1024*/) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// if ICE is enabled then, these values will be updated when the session start()s and call ice_init()
tsk_strupdate(&p_self->p_remote_ip, pc_ip);
p_self->u_remote_port = u_port;
return 0;
}
int tbfcp_session_set_remote_role(tbfcp_session_t* p_self, enum tbfcp_role_e e_role_remote)
{
tsk_bool_t b_is_role_acceptable;
int ret;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if ((ret = tbfcp_utils_is_role_acceptable(p_self->e_role_local, e_role_remote, &b_is_role_acceptable))) {
return ret;
}
if (!b_is_role_acceptable) {
TSK_DEBUG_ERROR("%d not acceptable as remote role because local role = %d", e_role_remote, p_self->e_role_local);
return -2;
}
p_self->e_role_remote = e_role_remote;
return 0;
}
int tbfcp_session_set_remote_setup(struct tbfcp_session_s* p_self, enum tbfcp_setup_e e_setup_remote)
{
tsk_bool_t b_is_setup_acceptable;
int ret;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if ((ret = tbfcp_utils_is_setup_acceptable(p_self->e_setup_local, e_setup_remote, &b_is_setup_acceptable))) {
return ret;
}
if (!b_is_setup_acceptable) {
TSK_DEBUG_ERROR("%d not acceptable as remote setup because local setup = %d", e_setup_remote, p_self->e_setup_local);
return -2;
}
p_self->e_setup_remote = e_setup_remote;
return 0;
}
int tbfcp_session_set_conf_ids(tbfcp_session_t* p_self, uint32_t u_conf_id, uint16_t u_user_id, uint16_t u_floor_id)
{
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
p_self->conf_ids.u_conf_id = u_conf_id;
p_self->conf_ids.u_user_id = u_user_id;
p_self->conf_ids.u_floor_id = u_floor_id;
return 0;
}
int tbfcp_session_get_profile(const tbfcp_session_t* pc_self, const char** ppc_profile)
{
if (!pc_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
return tbfcp_utils_get_profile(pc_self->e_socket_type, ppc_profile);
}
int tbfcp_session_get_local_role(const tbfcp_session_t* pc_self, enum tbfcp_role_e *pe_role_local)
{
if (!pc_self || !pe_role_local) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
*pe_role_local = pc_self->e_role_local;
return 0;
}
int tbfcp_session_get_local_setup(const struct tbfcp_session_s* pc_self, enum tbfcp_setup_e *pe_setup_local)
{
if (!pc_self || !pe_setup_local) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
*pe_setup_local = pc_self->e_setup_local;
return 0;
}
int tbfcp_session_get_local_address(const tbfcp_session_t* pc_self, const char** ppc_ip, tnet_port_t *pu_port)
{
if (!pc_self || !ppc_ip || !pu_port) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
*ppc_ip = pc_self->p_local_public_ip;
*pu_port = pc_self->u_local_public_port;
return 0;
}
int tbfcp_session_create_pkt_Hello(struct tbfcp_session_s* p_self, struct tbfcp_pkt_s** pp_pkt)
{
int ret;
if (!p_self || !pp_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if ((ret = tbfcp_pkt_create_Hello(p_self->conf_ids.u_conf_id, tbfcp_utils_rand_u16(), p_self->conf_ids.u_user_id, pp_pkt))) {
goto bail;
}
bail:
// lock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_create_pkt_FloorRequest(struct tbfcp_session_s* p_self, struct tbfcp_pkt_s** pp_pkt)
{
int ret;
if (!p_self || !pp_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if ((ret = tbfcp_pkt_create_FloorRequest_2(p_self->conf_ids.u_conf_id, tbfcp_utils_rand_u16(), p_self->conf_ids.u_user_id, p_self->conf_ids.u_floor_id, pp_pkt))) {
goto bail;
}
bail:
// lock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_create_pkt_FloorRelease(struct tbfcp_session_s* p_self, struct tbfcp_pkt_s** pp_pkt)
{
int ret;
if (!p_self || !pp_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if ((ret = tbfcp_pkt_create_FloorRelease_2(p_self->conf_ids.u_conf_id, tbfcp_utils_rand_u16(), p_self->conf_ids.u_user_id, p_self->conf_ids.u_floor_id, pp_pkt))) {
goto bail;
}
bail:
// lock()
tsk_safeobj_unlock(p_self);
return ret;
}
static int _tbfcp_session_send_buff(tbfcp_session_t* p_self, const void* pc_buff_ptr, tsk_size_t u_buff_size)
{
int ret = 0;
tsk_size_t u_sent_bytes = 0;
if (!p_self || !pc_buff_ptr || !u_buff_size) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if (!p_self->b_started) {
TSK_DEBUG_ERROR("BFCP session not started");
ret = -2;
goto bail;
}
if (TNET_SOCKET_TYPE_IS_DGRAM(p_self->e_socket_type)) {
u_sent_bytes = tnet_transport_sendto(p_self->p_transport, p_self->p_transport->master->fd, (const struct sockaddr *)&p_self->remote_addr, pc_buff_ptr, u_buff_size);
}
else {
TSK_DEBUG_ERROR("Not implemented yet");
ret = -3;
goto bail;
}
if (u_sent_bytes != u_buff_size) {
TSK_DEBUG_ERROR("Failed to send %u bytes. Only %u sent", (unsigned)u_buff_size, u_sent_bytes);
ret = -2;
goto bail;
}
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int tbfcp_session_send_pkt(tbfcp_session_t* p_self, const tbfcp_pkt_t* pc_pkt)
{
int ret = 0;
tbfcp_udp_pkt_t *p_udp_pkt = tsk_null;
if (!p_self || !pc_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if (TNET_SOCKET_TYPE_IS_DGRAM(p_self->e_socket_type)) {
const tsk_list_item_t* pc_item = tsk_list_find_item_by_pred(p_self->p_list_udp_pkts, __pred_find_udp_pkt_by_transac_id, &pc_pkt->hdr.transac_id);
if (pc_item) {
p_udp_pkt = tsk_object_ref(TSK_OBJECT(pc_item->data));
}
else {
tbfcp_udp_pkt_t *_p_udp_pkt = tsk_null;
if ((ret = _tbfcp_udp_pkt_create(pc_pkt, &_p_udp_pkt))) {
goto bail;
}
p_udp_pkt = tsk_object_ref(_p_udp_pkt);
tsk_list_push_back_data(p_self->p_list_udp_pkts, (void**)&_p_udp_pkt);
}
}
else {
}
if ((ret = _tbfcp_session_send_pkt(p_self, pc_pkt))) {
goto bail;
}
if (p_udp_pkt) {
p_udp_pkt->timer.u_id = tsk_timer_manager_schedule(p_self->timer.ph_global, p_udp_pkt->timer.u_timeout, _tbfcp_session_timer_callback, p_self);
p_udp_pkt->timer.u_timeout += kBfcpTimerT1;
}
bail:
TSK_OBJECT_SAFE_FREE(p_udp_pkt);
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int _tbfcp_session_send_pkt(tbfcp_session_t* p_self, const tbfcp_pkt_t* pc_pkt)
{
int ret;
tsk_size_t u_min_size;
if (!p_self || !pc_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
if (!p_self->b_started) {
TSK_DEBUG_ERROR("BFCP session not started");
ret = -2;
goto bail;
}
if ((ret = tbfcp_pkt_get_size_in_octetunits_with_padding(pc_pkt, &u_min_size))) {
goto bail;
}
u_min_size += kBfcpBuffMinPad;
if (p_self->u_buff_send_size < u_min_size) {
if (!(p_self->p_buff_send_ptr = tsk_realloc(p_self->p_buff_send_ptr, u_min_size))) {
TSK_DEBUG_ERROR("Failed to allocate buffer with size = %u", u_min_size);
ret = -3;
p_self->u_buff_send_size = 0;
goto bail;
}
p_self->u_buff_send_size = u_min_size;
}
if ((ret = tbfcp_pkt_write_with_padding(pc_pkt, p_self->p_buff_send_ptr, p_self->u_buff_send_size, &u_min_size))) {
goto bail;
}
if ((ret = _tbfcp_session_send_buff(p_self, p_self->p_buff_send_ptr, u_min_size))) {
goto bail;
}
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
int _tbfcp_session_send_Hello(tbfcp_session_t* p_self)
{
tbfcp_pkt_t* p_pkt = tsk_null;
int ret;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if ((ret = tbfcp_pkt_create_Hello(p_self->conf_ids.u_conf_id, tbfcp_utils_rand_u16(), p_self->conf_ids.u_user_id, &p_pkt))) {
goto bail;
}
if ((ret = tbfcp_session_send_pkt(p_self, p_pkt))) {
goto bail;
}
bail:
TSK_OBJECT_SAFE_FREE(p_pkt);
return ret;
}
int _tbfcp_session_send_HelloAck(tbfcp_session_t* p_self, const tbfcp_pkt_t *pc_hello)
{
tbfcp_pkt_t* p_pkt = tsk_null;
int ret;
if (!p_self || !pc_hello) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if ((ret = tbfcp_pkt_create_HelloAck_2(pc_hello->hdr.conf_id, pc_hello->hdr.transac_id, pc_hello->hdr.user_id, &p_pkt))) {
goto bail;
}
if ((ret = _tbfcp_session_send_pkt(p_self, p_pkt))) {
goto bail;
}
bail:
TSK_OBJECT_SAFE_FREE(p_pkt);
return ret;
}
static int _tbfcp_session_send_FloorRequest(tbfcp_session_t* p_self)
{
tbfcp_pkt_t* p_pkt = tsk_null;
int ret;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if ((ret = tbfcp_pkt_create_FloorRequest_2(p_self->conf_ids.u_conf_id, tbfcp_utils_rand_u16(), p_self->conf_ids.u_user_id, p_self->conf_ids.u_floor_id, &p_pkt))) {
goto bail;
}
if ((ret = tbfcp_session_send_pkt(p_self, p_pkt))) {
goto bail;
}
bail:
TSK_OBJECT_SAFE_FREE(p_pkt);
return ret;
}
static int _tbfcp_session_process_incoming_pkt(tbfcp_session_t* p_self, const tbfcp_pkt_t *pc_pkt)
{
int ret = 0;
if (!p_self || !pc_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// lock()
tsk_safeobj_lock(p_self);
switch (pc_pkt->hdr.primitive) {
case tbfcp_primitive_Hello:
if ((ret = _tbfcp_session_send_HelloAck(p_self, pc_pkt))) {
goto bail;
}
break;
case tbfcp_primitive_HelloAck:
default:
break;
}
// raise event
_tbfcp_session_raise_inf_inc_msg(p_self, pc_pkt);
// remove request
tsk_list_remove_item_by_pred(p_self->p_list_udp_pkts, __pred_find_udp_pkt_by_transac_id, &pc_pkt->hdr.transac_id);
bail:
// unlock()
tsk_safeobj_unlock(p_self);
return ret;
}
// clear junks (e.g. IPSec)
static int _tbfcp_session_socket_type_make_valid(enum tnet_socket_type_e e_in_st, enum tnet_socket_type_e *pe_out_st)
{
if (!pe_out_st) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if (TNET_SOCKET_TYPE_IS_DTLS(e_in_st) || TNET_SOCKET_TYPE_IS_UDP(e_in_st) || TNET_SOCKET_TYPE_IS_TLS(e_in_st) || TNET_SOCKET_TYPE_IS_TCP(e_in_st)) {
*pe_out_st = e_in_st;
}
else {
*pe_out_st = kBfcpTransportDefault;
}
return 0;
}
static int _tbfcp_session_timer_schedule(tbfcp_session_t* p_self, _bfcp_timer_type_t e_timer, uint64_t u_timeout)
{
int ret = 0;
if (!p_self) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
tsk_safeobj_lock(p_self); // must
switch (e_timer) {
case _bfcp_timer_type_T1:
if (!TSK_TIMER_ID_IS_VALID(p_self->timer.id_T1)) {
p_self->timer.id_T1 = tsk_timer_mgr_global_schedule(u_timeout, _tbfcp_session_timer_callback, p_self);
}
else {
TSK_DEBUG_ERROR("T1 timer is still valid");
ret = -3;
}
break;
case _bfcp_timer_type_T2:
if (!TSK_TIMER_ID_IS_VALID(p_self->timer.id_T2)) {
p_self->timer.id_T2 = tsk_timer_mgr_global_schedule(u_timeout, _tbfcp_session_timer_callback, p_self);
}
else {
TSK_DEBUG_ERROR("T2 timer is still valid");
ret = -3;
}
break;
case _bfcp_timer_type_TcpReconnect:
if (!TSK_TIMER_ID_IS_VALID(p_self->timer.id_TcpReconnect)) {
p_self->timer.id_TcpReconnect = tsk_timer_mgr_global_schedule(u_timeout, _tbfcp_session_timer_callback, p_self);
}
else {
TSK_DEBUG_ERROR("TcpReconnect timer is still valid");
ret = -3;
}
break;
default:
TSK_DEBUG_ERROR("%d not valid BFCP timer", e_timer);
ret = -2;
break;
}
tsk_safeobj_unlock(p_self);
return ret;
}
static int _tbfcp_session_timer_callback(const void* pc_arg, tsk_timer_id_t timer_id)
{
tbfcp_session_t* p_session = (tbfcp_session_t*)pc_arg;
const tsk_list_item_t* pc_item;
tsk_safeobj_lock(p_session); // must
if (!p_session->b_started) {
goto bail;
}
pc_item = tsk_list_find_item_by_pred(p_session->p_list_udp_pkts, __pred_find_udp_pkt_by_timer, &timer_id);
if (pc_item) {
tbfcp_udp_pkt_t* pc_udp_pkt = (tbfcp_udp_pkt_t*)pc_item->data;
if (pc_udp_pkt->timer.u_timeout <= kBfcpTimerT1Max) {
tbfcp_session_send_pkt(p_session, pc_udp_pkt->p_pkt);
}
else {
// raise event
_tbfcp_session_raise_err_send_timedout(p_session, pc_udp_pkt->p_pkt);
// remove pkt
tsk_list_remove_item_by_pred(p_session->p_list_udp_pkts, __pred_find_udp_pkt_by_timer, &timer_id);
}
}
#if 0
if (p_session->timer.id_T1 == timer_id) {
p_session->timer.id_T1 = TSK_INVALID_TIMER_ID;
// OnExpire(session, EVENT_BYE);
}
else if (p_session->timer.id_T2 == timer_id) {
p_session->timer.id_T2 = TSK_INVALID_TIMER_ID;
// OnExpire(session, EVENT_REPORT);
}
#endif
bail:
tsk_safeobj_unlock(p_session);
return 0;
}
static int _tbfcp_session_transport_layer_dgram_cb(const tnet_transport_event_t* e)
{
tbfcp_session_t* p_session = (tbfcp_session_t*)e->callback_data;
int ret;
tbfcp_pkt_t* p_pkt = tsk_null;
switch(e->type) {
case event_data: {
break;
}
case event_closed:
case event_connected:
default: {
return 0;
}
}
if ((ret = tbfcp_pkt_read(e->data, e->size, &p_pkt))) {
goto bail;
}
if ((ret = _tbfcp_session_process_incoming_pkt(p_session, p_pkt))) {
goto bail;
}
bail:
TSK_OBJECT_SAFE_FREE(p_pkt);
return ret;
}
static int _tbfcp_session_transport_layer_stream_cb(const tnet_transport_event_t* e)
{
// tbfcp_session_t* p_session = (tbfcp_session_t*)e->callback_data;
TSK_DEBUG_ERROR("Not implemented yet");
return -1;
}
static tsk_object_t* tbfcp_session_ctor(tsk_object_t * self, va_list * app)
{
tbfcp_session_t *p_session = (tbfcp_session_t *)self;
if (p_session) {
p_session->timer.id_T1 = TSK_INVALID_TIMER_ID;
p_session->timer.id_T2 = TSK_INVALID_TIMER_ID;
if (!(p_session->p_list_udp_pkts = tsk_list_create())) {
TSK_DEBUG_ERROR("Failed to create en empty list");
return tsk_null;
}
// get a handle for the global timer manager
if (!(p_session->timer.ph_global = tsk_timer_mgr_global_ref())) {
TSK_DEBUG_ERROR("Failed to get a reference to the global timer");
return tsk_null;
}
p_session->u_local_port = TNET_SOCKET_PORT_ANY;
p_session->e_role_local = kBfcpRoleDefault;
p_session->e_setup_local = kBfcpSetupDefault;
tsk_safeobj_init(p_session);
}
return self;
}
static tsk_object_t* tbfcp_session_dtor(tsk_object_t * self)
{
tbfcp_session_t *p_session = (tbfcp_session_t *)self;
if (p_session) {
TSK_DEBUG_INFO("*** BFCP session destroyed ***");
// stop the session if not already done
tbfcp_session_stop(p_session);
// release the handle for the global timer manager
tsk_timer_mgr_global_unref(&p_session->timer.ph_global);
TSK_FREE(p_session->p_local_ip);
TSK_FREE(p_session->p_local_public_ip);
TSK_FREE(p_session->p_remote_ip);
TSK_FREE(p_session->p_buff_send_ptr);
TSK_OBJECT_SAFE_FREE(p_session->p_natt_ctx);
TSK_OBJECT_SAFE_FREE(p_session->p_ice_ctx);
TSK_OBJECT_SAFE_FREE(p_session->p_transport);
TSK_OBJECT_SAFE_FREE(p_session->p_list_udp_pkts);
tsk_safeobj_deinit(p_session);
}
return self;
}
static int tbfcp_session_cmp(const tsk_object_t *_pss1, const tsk_object_t *_pss2)
{
const tbfcp_session_t *pc_ss1 = (const tbfcp_session_t *)_pss1;
const tbfcp_session_t *pc_ss2 = (const tbfcp_session_t *)_pss2;
return (int)(pc_ss1 - pc_ss2);
}
static const tsk_object_def_t tbfcp_session_def_s = {
sizeof(tbfcp_session_t),
tbfcp_session_ctor,
tbfcp_session_dtor,
tbfcp_session_cmp,
};
const tsk_object_def_t *tbfcp_session_def_t = &tbfcp_session_def_s;
static int _tbfcp_udp_pkt_create(const tbfcp_pkt_t *pc_pkt, tbfcp_udp_pkt_t** pp_pkt)
{
extern const tsk_object_def_t *tbfcp_udp_pkt_def_t;
if (!pc_pkt || !pp_pkt) {
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
*pp_pkt = tsk_object_new(tbfcp_udp_pkt_def_t);
if (!(*pp_pkt)) {
TSK_DEBUG_ERROR("Failed to create object with type= 'tbfcp_udp_pkt_def_t'");
return -2;
}
(*pp_pkt)->p_pkt = tsk_object_ref(TSK_OBJECT(pc_pkt));
return 0;
}
static tsk_object_t* tbfcp_udp_pkt_ctor(tsk_object_t * self, va_list * app)
{
tbfcp_udp_pkt_t *p_udp_pkt = (tbfcp_udp_pkt_t *)self;
if (p_udp_pkt) {
p_udp_pkt->timer.u_timeout = kBfcpTimerT1;
p_udp_pkt->timer.u_id = TSK_INVALID_TIMER_ID;
}
return self;
}
static tsk_object_t* tbfcp_udp_pkt_dtor(tsk_object_t * self)
{
tbfcp_udp_pkt_t *p_udp_pkt = (tbfcp_udp_pkt_t *)self;
if (p_udp_pkt) {
TSK_OBJECT_SAFE_FREE(p_udp_pkt->p_pkt);
TSK_DEBUG_INFO("*** tbfcp_udp_pkt_t destroyed ***");
}
return self;
}
static const tsk_object_def_t tbfcp_udp_pkt_def_s = {
sizeof(tbfcp_udp_pkt_t),
tbfcp_udp_pkt_ctor,
tbfcp_udp_pkt_dtor,
tsk_null,
};
const tsk_object_def_t *tbfcp_udp_pkt_def_t = &tbfcp_udp_pkt_def_s;
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