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ice_transport.cpp
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Sébastien Blin authoredChange-Id: I8d99d7f229e25f970a2a12cd7d2a2bee69017a5a
Sébastien Blin authoredChange-Id: I8d99d7f229e25f970a2a12cd7d2a2bee69017a5a
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ice_transport.cpp 51.18 KiB
/*
* Copyright (C) 2004-2020 Savoir-faire Linux Inc.
*
* Author: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ice_transport.h"
#include "ice_socket.h"
#include "logger.h"
#include "sip/sip_utils.h"
#include "manager.h"
#include "upnp/upnp_control.h"
#include "transport/peer_channel.h"
#include "dring/callmanager_interface.h"
#include <pjlib.h>
#include <map>
#include <atomic>
#include <queue>
#include <mutex>
#include <condition_variable>
#include <thread>
#include <utility>
#include <tuple>
#include <algorithm>
#include <sstream>
#include <chrono>
#include <thread>
#include <cerrno>
#include "pj/limits.h"
#define TRY(ret) do { \
if ((ret) != PJ_SUCCESS) \
throw std::runtime_error(#ret " failed"); \
} while (0)
namespace jami {
static constexpr unsigned STUN_MAX_PACKET_SIZE {8192};
static constexpr uint16_t IPV6_HEADER_SIZE = 40; ///< Size in bytes of IPV6 packet header
static constexpr uint16_t IPV4_HEADER_SIZE = 20; ///< Size in bytes of IPV4 packet header
static constexpr int MAX_CANDIDATES {32};
static constexpr int MAX_DESTRUCTION_TIMEOUT {3};
//==============================================================================
using MutexGuard = std::lock_guard<std::mutex>;
using MutexLock = std::unique_lock<std::mutex>;
namespace
{
struct IceSTransDeleter
{ void operator ()(pj_ice_strans* ptr) {
pj_ice_strans_stop_ice(ptr);
pj_ice_strans_destroy(ptr);
}
};
} // namespace <anonymous>
//==============================================================================
class IceTransport::Impl
{
public:
Impl(const char* name, int component_count, bool master, const IceTransportOptions& options);
~Impl();
void onComplete(pj_ice_strans* ice_st, pj_ice_strans_op op,
pj_status_t status);
void onReceiveData(unsigned comp_id, void *pkt, pj_size_t size);
/**
* Set/change transport role as initiator.
* Should be called before start method.
*/
bool setInitiatorSession();
/**
* Set/change transport role as slave.
* Should be called before start method.
*/
bool setSlaveSession();
bool createIceSession(pj_ice_sess_role role);
void getUFragPwd();
void getDefaultCanditates();
// Non-mutex protected of public versions
bool _isInitialized() const;
bool _isStarted() const;
bool _isRunning() const;
bool _isFailed() const;
IpAddr getLocalAddress(unsigned comp_id) const;
IpAddr getRemoteAddress(unsigned comp_id) const;
std::unique_ptr<pj_pool_t, std::function<void(pj_pool_t*)>> pool_;
IceTransportCompleteCb on_initdone_cb_;
IceTransportCompleteCb on_negodone_cb_;
IceRecvInfo on_recv_cb_;
mutable std::mutex iceMutex_ {};
std::unique_ptr<pj_ice_strans, IceSTransDeleter> icest_;
unsigned component_count_;
pj_ice_sess_cand cand_[MAX_CANDIDATES] {};
std::string local_ufrag_;
std::string local_pwd_;
pj_sockaddr remoteAddr_;
std::condition_variable iceCV_ {};
pj_ice_strans_cfg config_;
std::string last_errmsg_;
std::atomic_bool is_stopped_ {false};
struct Packet {
Packet(void *pkt, pj_size_t size)
: data{reinterpret_cast<char *>(pkt), reinterpret_cast<char *>(pkt) + size} { }
std::vector<char> data;
};
std::vector<PeerChannel> peerChannels_;
struct ComponentIO {
std::mutex mutex;
std::condition_variable cv;
std::deque<Packet> queue;
IceRecvCb cb;
};
std::vector<ComponentIO> compIO_;
std::atomic_bool initiatorSession_ {true};
/**
* Returns the IP of each candidate for a given component in the ICE session
*/
struct LocalCandidate {
IpAddr addr;
pj_ice_cand_transport transport;
};
std::vector<LocalCandidate> getLocalICECandidates(unsigned comp_id) const;
/**
* Adds a reflective candidate to ICE session
* Must be called before negotiation
*/
void addReflectiveCandidate(int comp_id, const IpAddr &base,
const IpAddr &addr,
const pj_ice_cand_transport& transport);
/**
* Creates UPnP port mappings and adds ICE candidates based on those mappings
*/
void selectUPnPIceCandidates();
std::unique_ptr<upnp::Controller> upnp_;
std::mutex upnpMutex_;
bool onlyIPv4Private_ {true};
// IO/Timer events are handled by following thread
std::thread thread_;
std::atomic_bool threadTerminateFlags_ {false};
bool handleEvents(unsigned max_msec);
// Wait data on components
std::vector<pj_ssize_t> lastReadLen_;
std::condition_variable waitDataCv_ = {};
onShutdownCb scb;
};
//==============================================================================
/**
* Add stun/turn servers or default host as candidates
*/
static void
add_stun_server(pj_ice_strans_cfg& cfg, int af)
{
if (cfg.stun_tp_cnt >= PJ_ICE_MAX_STUN)
throw std::runtime_error("Too many STUN servers");
auto& stun = cfg.stun_tp[cfg.stun_tp_cnt++];
pj_ice_strans_stun_cfg_default(&stun);
stun.cfg.max_pkt_size = STUN_MAX_PACKET_SIZE;
stun.af = af;
stun.conn_type = cfg.stun.conn_type;
JAMI_DBG("[ice] added host stun server");
}
static void
add_stun_server(pj_pool_t& pool, pj_ice_strans_cfg& cfg, const StunServerInfo& info)
{
if (cfg.stun_tp_cnt >= PJ_ICE_MAX_STUN)
throw std::runtime_error("Too many STUN servers");
IpAddr ip {info.uri};
// Given URI cannot be DNS resolved or not IPv4 or IPv6?
// This prevents a crash into PJSIP when ip.toString() is called.
if (ip.getFamily() == AF_UNSPEC) {
JAMI_WARN("[ice] STUN server '%s' not used, unresolvable address", info.uri.c_str());
return;
}
auto& stun = cfg.stun_tp[cfg.stun_tp_cnt++];
pj_ice_strans_stun_cfg_default(&stun);
pj_strdup2_with_null(&pool, &stun.server, ip.toString().c_str());
stun.af = ip.getFamily();
stun.port = PJ_STUN_PORT;
stun.cfg.max_pkt_size = STUN_MAX_PACKET_SIZE;
stun.conn_type = cfg.stun.conn_type;
JAMI_DBG("[ice] added stun server '%s', port %d", pj_strbuf(&stun.server), stun.port);
}
static void
add_turn_server(pj_pool_t& pool, pj_ice_strans_cfg& cfg, const TurnServerInfo& info)
{
if (cfg.turn_tp_cnt >= PJ_ICE_MAX_TURN)
throw std::runtime_error("Too many TURN servers");
IpAddr ip {info.uri};
// Same comment as add_stun_server()
if (ip.getFamily() == AF_UNSPEC) {
JAMI_WARN("[ice] TURN server '%s' not used, unresolvable address", info.uri.c_str());
return;
}
auto& turn = cfg.turn_tp[cfg.turn_tp_cnt++];
pj_ice_strans_turn_cfg_default(&turn);
pj_strdup2_with_null(&pool, &turn.server, ip.toString().c_str());
turn.af = ip.getFamily();
turn.port = PJ_STUN_PORT;
turn.cfg.max_pkt_size = STUN_MAX_PACKET_SIZE;
turn.conn_type = cfg.turn.conn_type;
// Authorization (only static plain password supported yet)
if (not info.password.empty()) {
turn.auth_cred.type = PJ_STUN_AUTH_CRED_STATIC;
turn.auth_cred.data.static_cred.data_type = PJ_STUN_PASSWD_PLAIN;
pj_strset(&turn.auth_cred.data.static_cred.realm, (char*)info.realm.c_str(), info.realm.size());
pj_strset(&turn.auth_cred.data.static_cred.username, (char*)info.username.c_str(), info.username.size());
pj_strset(&turn.auth_cred.data.static_cred.data, (char*)info.password.c_str(), info.password.size());
}
JAMI_DBG("[ice] added turn server '%s', port %d", pj_strbuf(&turn.server), turn.port);
}
//==============================================================================
IceTransport::Impl::Impl(const char* name, int component_count, bool master,
const IceTransportOptions& options)
: pool_(nullptr, [](pj_pool_t* pool) { sip_utils::register_thread(); pj_pool_release(pool); })
, on_initdone_cb_(options.onInitDone)
, on_negodone_cb_(options.onNegoDone) , on_recv_cb_(options.onRecvReady)
, component_count_(component_count)
, compIO_(component_count)
, initiatorSession_(master)
, thread_()
{
if (options.upnpEnable)
upnp_.reset(new upnp::Controller(false));
auto &iceTransportFactory = Manager::instance().getIceTransportFactory();
config_ = iceTransportFactory.getIceCfg(); // config copy
if (options.tcpEnable) {
config_.protocol = PJ_ICE_TP_TCP;
config_.stun.conn_type = PJ_STUN_TP_TCP;
config_.turn.conn_type = PJ_TURN_TP_TCP;
} else {
config_.protocol = PJ_ICE_TP_UDP;
config_.stun.conn_type = PJ_STUN_TP_UDP;
config_.turn.conn_type = PJ_TURN_TP_UDP;
}
if (options.aggressive) {
config_.opt.aggressive = PJ_TRUE;
} else {
config_.opt.aggressive = PJ_FALSE;
}
peerChannels_.resize(component_count_ + 1);
lastReadLen_.resize(component_count_);
// Add local hosts (IPv4, IPv6) as stun candidates
add_stun_server(config_, pj_AF_INET6());
add_stun_server(config_, pj_AF_INET());
sip_utils::register_thread();
pool_.reset(pj_pool_create(iceTransportFactory.getPoolFactory(),
"IceTransport.pool", 512, 512, NULL));
if (not pool_)
throw std::runtime_error("pj_pool_create() failed");
pj_ice_strans_cb icecb;
pj_bzero(&icecb, sizeof(icecb));
icecb.on_rx_data = \
[] (pj_ice_strans* ice_st, unsigned comp_id, void *pkt, pj_size_t size,
const pj_sockaddr_t* /*src_addr*/, unsigned /*src_addr_len*/) {
if (auto* tr = static_cast<Impl*>(pj_ice_strans_get_user_data(ice_st)))
tr->onReceiveData(comp_id, pkt, size);
else
JAMI_WARN("null IceTransport");
};
icecb.on_ice_complete = \
[] (pj_ice_strans* ice_st, pj_ice_strans_op op, pj_status_t status) {
if (auto* tr = static_cast<Impl*>(pj_ice_strans_get_user_data(ice_st)))
tr->onComplete(ice_st, op, status);
else
JAMI_WARN("null IceTransport");
};
icecb.on_data_sent = [](pj_ice_strans* ice_st, unsigned comp_id,
pj_ssize_t size) {
if (auto* tr = static_cast<Impl*>(pj_ice_strans_get_user_data(ice_st))) {
if (comp_id > 0 && comp_id - 1 < tr->lastReadLen_.size()) {
tr->lastReadLen_[comp_id - 1] = size;
tr->waitDataCv_.notify_all();
}
} else
JAMI_WARN("null IceTransport");
};
icecb.on_destroy = [](pj_ice_strans* ice_st) {
if (auto* tr = static_cast<Impl*>(pj_ice_strans_get_user_data(ice_st))) {
if (tr->scb)
tr->scb();
} else {
JAMI_WARN("null IceTransport");
}
};
// Add STUN servers
for (auto& server : options.stunServers)
add_stun_server(*pool_, config_, server);
// Add TURN servers
for (auto& server : options.turnServers)
add_turn_server(*pool_, config_, server);
static constexpr auto IOQUEUE_MAX_HANDLES = std::min(PJ_IOQUEUE_MAX_HANDLES, 64);
TRY( pj_timer_heap_create(pool_.get(), 100, &config_.stun_cfg.timer_heap) );
TRY( pj_ioqueue_create(pool_.get(), IOQUEUE_MAX_HANDLES, &config_.stun_cfg.ioqueue) );
pj_ice_strans* icest = nullptr;
pj_status_t status = pj_ice_strans_create(name, &config_, component_count,
this, &icecb, &icest);
if (status != PJ_SUCCESS || icest == nullptr) {
throw std::runtime_error("pj_ice_strans_create() failed");
}
// Must be created after any potential failure
thread_ = std::thread([this]{
sip_utils::register_thread();
while (not threadTerminateFlags_) {
// NOTE: handleEvents can return false in this case
// but here we don't care if there is event or not.
handleEvents(500); // limit polling to 500ms
}
// NOTE: This last handleEvents is necessary to close TURN socket.
// Because when destroying the TURN session pjproject creates a pj_timer
// to postpone the TURN destruction. This timer is only called if we poll
// the event queue.
auto started_destruction = std::chrono::system_clock::now();
while (handleEvents(500)) {
if (std::chrono::system_clock::now() - started_destruction > std::chrono::seconds(MAX_DESTRUCTION_TIMEOUT)) {
// If the transport is not closed after 3 seconds, avoid blocking
break;
}
}
});
}
IceTransport::Impl::~Impl()
{
sip_utils::register_thread();
icest_.reset(); // must be done before ioqueue/timer destruction
threadTerminateFlags_ = true;
if (thread_.joinable())
thread_.join();
if (config_.stun_cfg.ioqueue)
pj_ioqueue_destroy(config_.stun_cfg.ioqueue);
if (config_.stun_cfg.timer_heap)
pj_timer_heap_destroy(config_.stun_cfg.timer_heap);
emitSignal<DRing::CallSignal::ConnectionUpdate>(std::to_string((uintptr_t)this), 2);
}
bool
IceTransport::Impl::_isInitialized() const
{
if (auto icest = icest_.get()) {
auto state = pj_ice_strans_get_state(icest);
return state >= PJ_ICE_STRANS_STATE_SESS_READY and state != PJ_ICE_STRANS_STATE_FAILED;
}
return false;
}
bool
IceTransport::Impl::_isStarted() const
{
if (auto icest = icest_.get()) {
auto state = pj_ice_strans_get_state(icest);
return state >= PJ_ICE_STRANS_STATE_NEGO and state != PJ_ICE_STRANS_STATE_FAILED;
}
return false;
}
bool
IceTransport::Impl::_isRunning() const
{
if (auto icest = icest_.get()) {
auto state = pj_ice_strans_get_state(icest);
return state >= PJ_ICE_STRANS_STATE_RUNNING and state != PJ_ICE_STRANS_STATE_FAILED;
}
return false;
}
bool
IceTransport::Impl::_isFailed() const
{
if (auto icest = icest_.get())
return pj_ice_strans_get_state(icest) == PJ_ICE_STRANS_STATE_FAILED;
return false;
}
bool
IceTransport::Impl::handleEvents(unsigned max_msec)
{
// By tests, never seen more than two events per 500ms
static constexpr auto MAX_NET_EVENTS = 2;
pj_time_val max_timeout = {0, 0};
pj_time_val timeout = {0, 0};
unsigned net_event_count = 0;
max_timeout.msec = max_msec;
timeout.sec = timeout.msec = 0;
pj_timer_heap_poll(config_.stun_cfg.timer_heap, &timeout);
auto ret = timeout.msec != PJ_MAXINT32;
// timeout limitation
if (timeout.msec >= 1000)
timeout.msec = 999;
if (PJ_TIME_VAL_GT(timeout, max_timeout))
timeout = max_timeout;
do {
auto n_events = pj_ioqueue_poll(config_.stun_cfg.ioqueue, &timeout);
// timeout
if (not n_events)
return ret;
// error
if (n_events < 0) { const auto err = pj_get_os_error();
// Kept as debug as some errors are "normal" in regular context
last_errmsg_ = sip_utils::sip_strerror(err);
JAMI_DBG("[ice:%p] ioqueue error %d: %s", this, err, last_errmsg_.c_str());
std::this_thread::sleep_for(std::chrono::milliseconds(PJ_TIME_VAL_MSEC(timeout)));
return ret;
}
net_event_count += n_events;
timeout.sec = timeout.msec = 0;
} while (net_event_count < MAX_NET_EVENTS);
return ret;
}
void
IceTransport::Impl::onComplete(pj_ice_strans* ice_st, pj_ice_strans_op op, pj_status_t status)
{
const char *opname =
op == PJ_ICE_STRANS_OP_INIT ? "initialization" :
op == PJ_ICE_STRANS_OP_NEGOTIATION ? "negotiation" : "unknown_op";
const bool done = status == PJ_SUCCESS;
if (done) {
JAMI_DBG("[ice:%p] %s success", this, opname);
}
else {
last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("[ice:%p] %s failed: %s", this, opname, last_errmsg_.c_str());
}
{
std::lock_guard<std::mutex> lk(iceMutex_);
if (!icest_.get())
icest_.reset(ice_st);
}
if (done and op == PJ_ICE_STRANS_OP_INIT) {
if (initiatorSession_)
setInitiatorSession();
else
setSlaveSession();
selectUPnPIceCandidates();
}
if (op == PJ_ICE_STRANS_OP_INIT and on_initdone_cb_)
on_initdone_cb_(done);
else if (op == PJ_ICE_STRANS_OP_NEGOTIATION) {
if (done) {
// Dump of connection pairs
std::stringstream out;
for (unsigned i=0; i < component_count_; ++i) {
auto laddr = getLocalAddress(i);
auto raddr = getRemoteAddress(i);
if (laddr and raddr) {
out << " [" << i << "] "
<< laddr.toString(true, true)
<< " <-> "
<< raddr.toString(true, true)
<< '\n';
} else {
out << " [" << i << "] disabled\n";
}
}
JAMI_DBG("[ice:%p] connection pairs (local <-> remote):\n%s", this, out.str().c_str());
}
if (on_negodone_cb_)
on_negodone_cb_(done);
}
// Unlock waitForXXX APIs iceCV_.notify_all();
}
bool
IceTransport::Impl::setInitiatorSession()
{
JAMI_DBG("ICE as master");
initiatorSession_ = true;
if (_isInitialized()) {
auto status = pj_ice_strans_change_role(icest_.get(), PJ_ICE_SESS_ROLE_CONTROLLING);
if (status != PJ_SUCCESS) {
last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("[ice:%p] role change failed: %s", this, last_errmsg_.c_str());
return false;
}
return true;
}
return createIceSession(PJ_ICE_SESS_ROLE_CONTROLLING);
}
bool
IceTransport::Impl::setSlaveSession()
{
JAMI_DBG("ICE as slave");
initiatorSession_ = false;
if (_isInitialized()) {
auto status = pj_ice_strans_change_role(icest_.get(), PJ_ICE_SESS_ROLE_CONTROLLED);
if (status != PJ_SUCCESS) {
last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("[ice:%p] role change failed: %s", this, last_errmsg_.c_str());
return false;
}
return true;
}
return createIceSession(PJ_ICE_SESS_ROLE_CONTROLLED);
}
IpAddr
IceTransport::Impl::getLocalAddress(unsigned comp_id) const
{
// Return the local IP of negotiated connection pair
if (_isRunning()) {
if (auto sess = pj_ice_strans_get_valid_pair(icest_.get(), comp_id+1))
return sess->lcand->addr;
else
return {}; // disabled component
} else
JAMI_WARN("[ice:%p] bad call: non-negotiated transport", this);
// Return the default IP (could be not nominated and valid after negotiation)
if (_isInitialized())
return cand_[comp_id].addr;
JAMI_ERR("[ice:%p] bad call: non-initialized transport", this);
return {};
}
IpAddr
IceTransport::Impl::getRemoteAddress(unsigned comp_id) const
{
// Return the remote IP of negotiated connection pair
if (_isRunning()) {
if (auto sess = pj_ice_strans_get_valid_pair(icest_.get(), comp_id+1))
return sess->rcand->addr;
else
return {}; // disabled component
} else
JAMI_WARN("[ice:%p] bad call: non-negotiated transport", this);
JAMI_ERR("[ice:%p] bad call: non-negotiated transport", this); return {};
}
void
IceTransport::Impl::getUFragPwd()
{
pj_str_t local_ufrag, local_pwd;
pj_ice_strans_get_ufrag_pwd(icest_.get(), &local_ufrag, &local_pwd, nullptr, nullptr);
local_ufrag_.assign(local_ufrag.ptr, local_ufrag.slen);
local_pwd_.assign(local_pwd.ptr, local_pwd.slen);
}
void
IceTransport::Impl::getDefaultCanditates()
{
for (unsigned i=0; i < component_count_; ++i)
pj_ice_strans_get_def_cand(icest_.get(), i+1, &cand_[i]);
}
bool
IceTransport::Impl::createIceSession(pj_ice_sess_role role)
{
if (pj_ice_strans_init_ice(icest_.get(), role, nullptr, nullptr) != PJ_SUCCESS) {
JAMI_ERR("[ice:%p] pj_ice_strans_init_ice() failed", this);
return false;
}
// Fetch some information on local configuration
getUFragPwd();
getDefaultCanditates();
JAMI_DBG("[ice:%p] (local) ufrag=%s, pwd=%s", this, local_ufrag_.c_str(), local_pwd_.c_str());
return true;
}
std::vector<IceTransport::Impl::LocalCandidate>
IceTransport::Impl::getLocalICECandidates(unsigned comp_id) const
{
std::vector<LocalCandidate> cand_addrs;
pj_ice_sess_cand cand[PJ_ARRAY_SIZE(cand_)];
unsigned cand_cnt = PJ_ARRAY_SIZE(cand);
if (pj_ice_strans_enum_cands(icest_.get(), comp_id, &cand_cnt, cand) != PJ_SUCCESS) {
JAMI_ERR("[ice:%p] pj_ice_strans_enum_cands() failed", this);
return cand_addrs;
}
for (unsigned i=0; i<cand_cnt; ++i) {
cand_addrs.push_back({cand[i].addr, cand[i].transport});
}
return cand_addrs;
}
void IceTransport::Impl::addReflectiveCandidate(int comp_id, const IpAddr &base,
const IpAddr &addr,
const pj_ice_cand_transport& transport) {
// HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK
// WARNING: following implementation is a HACK of PJNATH !!
// ice_strans doesn't have any API that permit to inject ICE any kind of
// candidates. So, the hack consists in accessing hidden ICE session using a
// patched PJPNATH library with a new API exposing this session
// (pj_ice_strans_get_ice_sess). Then call pj_ice_sess_add_cand() with a
// carfully forged candidate: the transport_id field uses an index in ICE
// transport STUN servers array corresponding to a STUN server with the same
// address familly. This implies we hope they'll not be modification of
// transport_id meaning in future and no conflics with the borrowed STUN
// config.
// HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK-HACK
sip_utils::register_thread();
// borrowed from pjproject/pjnath/ice_strans.c, modified to be C++11'ized.
static auto CREATE_TP_ID = [](pj_uint8_t type, pj_uint8_t idx) {
return (pj_uint8_t)((type << 6) | idx);
};
static constexpr int SRFLX_PREF = 65535;
static constexpr int TP_STUN = 1;
// find a compatible STUN host with same address familly, normally all system
// enabled host addresses are represented, so we expect to always found this
// host
int idx = -1;
auto af = addr.getFamily();
if (af == AF_UNSPEC) {
JAMI_ERR("[ice:%p] Unable to add reflective IP %s: unknown addess familly",
this, addr.toString().c_str());
return;
}
for (unsigned i = 0; i < config_.stun_tp_cnt; ++i) {
if (config_.stun_tp[i].af == af) {
idx = i;
break;
}
}
if (idx < 0) {
JAMI_ERR("[ice:%p] Unable to add reflective IP %s: no suitable local STUN "
"host found",
this, addr.toString().c_str());
return;
}
pj_ice_sess_cand cand;
cand.type = PJ_ICE_CAND_TYPE_SRFLX;
cand.status = PJ_EPENDING; // not used
cand.comp_id = comp_id;
cand.transport_id = CREATE_TP_ID(TP_STUN, idx); // HACK!!
cand.local_pref = SRFLX_PREF; // reflective
cand.transport = transport;
/* cand.foundation = ? */
/* cand.prio = calculated by ice session */
/* make base and addr the same since we're not going through a server */
pj_sockaddr_cp(&cand.base_addr, base.pjPtr());
pj_sockaddr_cp(&cand.addr, addr.pjPtr());
pj_sockaddr_cp(&cand.rel_addr, &cand.base_addr);
pj_ice_calc_foundation(pool_.get(), &cand.foundation, cand.type,
&cand.base_addr);
std::lock_guard<std::mutex> lk(iceMutex_);
if (!icest_) return;
auto ret = pj_ice_sess_add_cand(
pj_ice_strans_get_ice_sess(icest_.get()), cand.comp_id, cand.transport_id,
cand.type, cand.local_pref, &cand.foundation, &cand.addr, &cand.base_addr,
&cand.rel_addr, pj_sockaddr_get_len(&cand.addr), NULL, cand.transport);
if (ret != PJ_SUCCESS) {
last_errmsg_ = sip_utils::sip_strerror(ret);
JAMI_ERR("[ice:%p] pj_ice_sess_add_cand failed with error %d: %s", this,
ret, last_errmsg_.c_str());
JAMI_ERR("[ice:%p] failed to add candidate for comp_id=%d : %s : %s", this,
comp_id, base.toString().c_str(), addr.toString().c_str());
} else {
JAMI_DBG("[ice:%p] succeed to add candidate for comp_id=%d : %s : %s", this,
comp_id, base.toString().c_str(), addr.toString().c_str());
}
}
void
IceTransport::Impl::selectUPnPIceCandidates()
{ // For every component, get the candidate(s)
// Create a port mapping either with that port, or with an available port
// Add candidate with that port and public IP
std::lock_guard<std::mutex> lk(upnpMutex_);
if (upnp_) {
auto publicIp = upnp_->getExternalIP();
if (not publicIp) {
JAMI_WARN("[ice:%p] Could not determine public IP for ICE candidates", this);
return;
}
auto localIp = upnp_->getLocalIP();
if (not localIp) {
JAMI_WARN("[ice:%p] Could not determine local IP for ICE candidates", this);
return;
}
// Use local list to store needed ports with their corresponding port type.
auto upnpIceCntr = 0;
for (unsigned comp_id = 1; comp_id <= component_count_; ++comp_id) {
auto candidates = getLocalICECandidates(comp_id);
for (const auto& candidate : candidates) {
if (candidate.transport == PJ_CAND_TCP_ACTIVE)
continue; // We don't need to map port 9.
localIp.setPort(candidate.addr.getPort());
if (candidate.addr != localIp)
continue;
uint16_t port = candidate.addr.getPort();
auto portType = candidate.transport == PJ_CAND_UDP ?
upnp::PortType::UDP : upnp::PortType::TCP;
// Request port
upnpIceCntr++;
JAMI_DBG("[ice:%p] UPnP: Trying to open port %d for ICE comp %d/%d and adding candidate with public IP",
this, port, upnpIceCntr, component_count_);
upnp_->requestMappingAdd([this, candidate, comp_id](uint16_t port_used, bool success) {
if (upnp_) {
std::lock_guard<std::mutex> lk(upnpMutex_);
auto publicIp = upnp_->getExternalIP();
if (not publicIp) {
JAMI_WARN("[ice:%p] Could not determine public IP for ICE candidates", this);
return;
}
auto localIp = upnp_->getLocalIP();
if (not localIp) {
JAMI_WARN("[ice:%p] Could not determine local IP for ICE candidates", this);
return;
}
if (success and port_used == candidate.addr.getPort()) {
publicIp.setPort(port_used);
addReflectiveCandidate(comp_id, candidate.addr, publicIp, candidate.transport);
}
}
}, port, portType, true);
}
}
}
}
void
IceTransport::Impl::onReceiveData(unsigned comp_id, void *pkt, pj_size_t size)
{
if (!comp_id or comp_id > component_count_) {
JAMI_ERR("rx: invalid comp_id (%u)", comp_id);
return;
}
if (!size)
return;
auto& io = compIO_[comp_id-1];
std::unique_lock<std::mutex> lk(io.mutex);
if (on_recv_cb_) {
on_recv_cb_(); }
if (io.cb) {
io.cb((uint8_t*)pkt, size);
} else {
std::error_code ec;
auto err = peerChannels_.at(comp_id-1).write((char*)pkt, size, ec);
if (err < 0) {
JAMI_ERR("[ice:%p] rx: channel is closed", this);
}
}
}
//==============================================================================
IceTransport::IceTransport(const char* name, int component_count, bool master,
const IceTransportOptions& options)
: pimpl_ {std::make_unique<Impl>(name, component_count, master, options)}
{}
IceTransport::~IceTransport()
{}
bool
IceTransport::isInitialized() const
{
std::lock_guard<std::mutex> lk(pimpl_->iceMutex_);
return pimpl_->_isInitialized();
}
bool
IceTransport::isStarted() const
{
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
return pimpl_->_isStarted();
}
bool
IceTransport::isRunning() const
{
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
return pimpl_->_isRunning();
}
bool
IceTransport::isStopped() const
{
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
return pimpl_->is_stopped_;
}
bool
IceTransport::isFailed() const
{
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
return pimpl_->_isFailed();
}
unsigned
IceTransport::getComponentCount() const
{
return pimpl_->component_count_;
}
bool
IceTransport::setSlaveSession()
{
return pimpl_->setSlaveSession();
}
boolIceTransport::setInitiatorSession()
{
return pimpl_->setInitiatorSession();
}
std::string IceTransport::getLastErrMsg() const {
return pimpl_->last_errmsg_;
}
bool
IceTransport::isInitiator() const
{
if (isInitialized()) {
return pj_ice_strans_get_role(pimpl_->icest_.get()) ==
PJ_ICE_SESS_ROLE_CONTROLLING;
}
return pimpl_->initiatorSession_;
}
bool
IceTransport::start(const Attribute& rem_attrs, const std::vector<IceCandidate>& rem_candidates)
{
if (not isInitialized()) {
JAMI_ERR("[ice:%p] not initialized transport", this);
pimpl_->is_stopped_ = true;
return false;
}
// pj_ice_strans_start_ice crashes if remote candidates array is empty
if (rem_candidates.empty()) {
JAMI_ERR("[ice:%p] start failed: no remote candidates", this);
pimpl_->is_stopped_ = true;
return false;
}
pj_str_t ufrag, pwd;
JAMI_DBG("[ice:%p] negotiation starting (%zu remote candidates)", this, rem_candidates.size());
auto status = pj_ice_strans_start_ice(pimpl_->icest_.get(),
pj_strset(&ufrag, (char*)rem_attrs.ufrag.c_str(), rem_attrs.ufrag.size()),
pj_strset(&pwd, (char*)rem_attrs.pwd.c_str(), rem_attrs.pwd.size()),
rem_candidates.size(),
rem_candidates.data());
if (status != PJ_SUCCESS) {
pimpl_->last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("[ice:%p] start failed: %s", this, pimpl_->last_errmsg_.c_str());
pimpl_->is_stopped_ = true;
return false;
}
emitSignal<DRing::CallSignal::ConnectionUpdate>(std::to_string((uintptr_t)pimpl_.get()), 0);
return true;
}
bool
IceTransport::start(const SDP& sdp)
{
if (not isInitialized()) {
JAMI_ERR("[ice:%p] not initialized transport", this);
pimpl_->is_stopped_ = true;
return false;
}
JAMI_DBG("[ice:%p] negotiation starting (%zu remote candidates)", this, sdp.candidates.size());
pj_str_t ufrag, pwd;
std::vector<IceCandidate> rem_candidates;
rem_candidates.reserve(sdp.candidates.size());
IceCandidate cand;
for (const auto &line : sdp.candidates) {
if (getCandidateFromSDP(line, cand)) rem_candidates.emplace_back(cand);
}
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
if (!pimpl_->icest_) return false;
auto status = pj_ice_strans_start_ice(pimpl_->icest_.get(),
pj_strset(&ufrag, (char*)sdp.ufrag.c_str(), sdp.ufrag.size()),
pj_strset(&pwd, (char*)sdp.pwd.c_str(), sdp.pwd.size()),
rem_candidates.size(),
rem_candidates.data());
if (status != PJ_SUCCESS) {
pimpl_->last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("[ice:%p] start failed: %s", this, pimpl_->last_errmsg_.c_str());
pimpl_->is_stopped_ = true;
return false;
}
emitSignal<DRing::CallSignal::ConnectionUpdate>(std::to_string((uintptr_t)pimpl_.get()), 0);
return true;
}
bool
IceTransport::stop()
{
pimpl_->is_stopped_ = true;
if (isStarted()) {
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
if (!pimpl_->icest_) return false;
auto status = pj_ice_strans_stop_ice(pimpl_->icest_.get());
if (status != PJ_SUCCESS) {
pimpl_->last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("ICE stop failed: %s", pimpl_->last_errmsg_.c_str());
return false;
}
}
return true;
}
void
IceTransport::cancelOperations()
{
for (auto& c: pimpl_->peerChannels_) {
c.stop();
}
}
IpAddr
IceTransport::getLocalAddress(unsigned comp_id) const
{
return pimpl_->getLocalAddress(comp_id);
}
IpAddr
IceTransport::getRemoteAddress(unsigned comp_id) const
{
return pimpl_->getRemoteAddress(comp_id);
}
const IceTransport::Attribute
IceTransport::getLocalAttributes() const
{
return {pimpl_->local_ufrag_, pimpl_->local_pwd_};
}
std::vector<std::string>
IceTransport::getLocalCandidates(unsigned comp_id) const
{
std::vector<std::string> res;
pj_ice_sess_cand cand[PJ_ARRAY_SIZE(pimpl_->cand_)];
unsigned cand_cnt = PJ_ARRAY_SIZE(cand);
{
std::lock_guard<std::mutex> lk {pimpl_->iceMutex_};
if (!pimpl_->icest_) return res;
if (pj_ice_strans_enum_cands(pimpl_->icest_.get(), comp_id+1, &cand_cnt, cand) != PJ_SUCCESS) {
JAMI_ERR("[ice:%p] pj_ice_strans_enum_cands() failed", this);
return res;
}
}
for (unsigned i=0; i<cand_cnt; ++i) {
std::ostringstream val;
char ipaddr[PJ_INET6_ADDRSTRLEN];
/** Section 4.5, RFC 6544 (https://tools.ietf.org/html/rfc6544)
* candidate-attribute = "candidate" ":" foundation SP component-id
* SP "TCP" SP priority SP connection-address SP port SP cand-type [SP
* rel-addr] [SP rel-port] SP tcp-type-ext
* *(SP extension-att-name SP
* extension-att-value)
*
* tcp-type-ext = "tcptype" SP tcp-type
* tcp-type = "active" / "passive" / "so"
*/
val.write(cand[i].foundation.ptr, cand[i].foundation.slen);
val << " " << std::to_string(cand[i].comp_id);
val << (cand[i].transport == PJ_CAND_UDP ? " UDP " : " TCP ");
val << std::to_string(cand[i].prio);
val << " " << pj_sockaddr_print(&cand[i].addr, ipaddr, sizeof(ipaddr), 0);
val << " " << std::to_string((unsigned)pj_sockaddr_get_port(&cand[i].addr));
val << " typ " << pj_ice_get_cand_type_name(cand[i].type);
if (cand[i].transport != PJ_CAND_UDP) {
val << " tcptype";
switch (cand[i].transport) {
case PJ_CAND_TCP_ACTIVE:
val << " active";
break;
case PJ_CAND_TCP_PASSIVE:
val << " passive";
break;
case PJ_CAND_TCP_SO:
default:
val << " so";
break;
}
}
res.push_back(val.str());
}
return res;
}
bool
IceTransport::registerPublicIP(unsigned compId, const IpAddr& publicIP)
{
if (not isInitialized()) {
JAMI_ERR("[ice:%p] registerPublicIP() called on non initialized transport", this);
return false;
}
// Find the local candidate corresponding to local host,
// then register a rflx candidate using given public address
// and this local address as base. It's port is used for both address
// even if on the public side it have strong probabilities to not exist.
// But as this candidate is made after initialization, it's not used during
// negotiation, only to exchanged candidates between peers.
auto localIP = ip_utils::getLocalAddr(publicIP.getFamily());
auto pubIP = publicIP; for (const auto& cand : pimpl_->getLocalICECandidates(compId)) {
auto port = cand.addr.getPort();
localIP.setPort(port);
if (cand.addr != localIP)
continue;
pubIP.setPort(port);
pimpl_->addReflectiveCandidate(compId, cand.addr, pubIP, cand.transport);
return true;
}
return false;
}
std::vector<uint8_t>
IceTransport::packIceMsg(uint8_t version) const
{
if (not isInitialized())
return {};
std::stringstream ss;
if (version == 1) {
msgpack::pack(ss, version);
msgpack::pack(ss, std::make_pair(pimpl_->local_ufrag_, pimpl_->local_pwd_));
msgpack::pack(ss, static_cast<uint8_t>(pimpl_->component_count_));
for (unsigned i=0; i<pimpl_->component_count_; i++)
msgpack::pack(ss, getLocalCandidates(i));
} else {
SDP sdp;
sdp.ufrag = pimpl_->local_ufrag_;
sdp.pwd = pimpl_->local_pwd_;
for (unsigned i = 0; i < pimpl_->component_count_; i++) {
auto candidates = getLocalCandidates(i);
sdp.candidates.reserve(sdp.candidates.size() + candidates.size());
sdp.candidates.insert(sdp.candidates.end(), candidates.begin(), candidates.end());
}
msgpack::pack(ss, sdp);
}
auto str(ss.str());
return std::vector<uint8_t>(str.begin(), str.end());
}
bool
IceTransport::getCandidateFromSDP(const std::string& line, IceCandidate& cand) const
{
/** Section 4.5, RFC 6544 (https://tools.ietf.org/html/rfc6544)
* candidate-attribute = "candidate" ":" foundation SP component-id SP
* "TCP" SP
* priority SP
* connection-address SP
* port SP
* cand-type
* [SP rel-addr]
* [SP rel-port]
* SP tcp-type-ext
* *(SP extension-att-name SP
* extension-att-value)
*
* tcp-type-ext = "tcptype" SP tcp-type
* tcp-type = "active" / "passive" / "so"
*/
int af, cnt;
char foundation[32], transport[12], ipaddr[80], type[32], tcp_type[32];
pj_str_t tmpaddr;
int comp_id, prio, port;
pj_status_t status;
pj_bool_t is_tcp = PJ_FALSE;
cnt = sscanf(line.c_str(), "%s %d %s %d %s %d typ %s tcptype %s\n",
foundation, &comp_id, transport, &prio, ipaddr, &port, type,
tcp_type);
if (cnt != 7 && cnt != 8) { JAMI_ERR("[ice:%p] Invalid ICE candidate line", this);
return false;
}
if (strcmp(transport, "TCP") == 0) {
is_tcp = PJ_TRUE;
}
pj_bzero(&cand, sizeof(IceCandidate));
if (strcmp(type, "host") == 0)
cand.type = PJ_ICE_CAND_TYPE_HOST;
else if (strcmp(type, "srflx") == 0)
cand.type = PJ_ICE_CAND_TYPE_SRFLX;
else if (strcmp(type, "prflx") == 0)
cand.type = PJ_ICE_CAND_TYPE_PRFLX;
else if (strcmp(type, "relay") == 0)
cand.type = PJ_ICE_CAND_TYPE_RELAYED;
else {
JAMI_WARN("[ice:%p] invalid remote candidate type '%s'", this, type);
return false;
}
if (is_tcp) {
if (strcmp(tcp_type, "active") == 0)
cand.transport = PJ_CAND_TCP_ACTIVE;
else if (strcmp(tcp_type, "passive") == 0)
cand.transport = PJ_CAND_TCP_PASSIVE;
else if (strcmp(tcp_type, "so") == 0)
cand.transport = PJ_CAND_TCP_SO;
else {
JAMI_WARN("[ice:%p] invalid transport type type '%s'", this, tcp_type);
return false;
}
} else {
cand.transport = PJ_CAND_UDP;
}
cand.comp_id = (pj_uint8_t)comp_id;
cand.prio = prio;
if (strchr(ipaddr, ':'))
af = pj_AF_INET6();
else {
af = pj_AF_INET();
pimpl_->onlyIPv4Private_ &= IpAddr(ipaddr).isPrivate();
}
tmpaddr = pj_str(ipaddr);
pj_sockaddr_init(af, &cand.addr, NULL, 0);
status = pj_sockaddr_set_str_addr(af, &cand.addr, &tmpaddr);
if (status != PJ_SUCCESS) {
JAMI_WARN("[ice:%p] invalid IP address '%s'", this, ipaddr);
return false;
}
pj_sockaddr_set_port(&cand.addr, (pj_uint16_t)port);
pj_strdup2(pimpl_->pool_.get(), &cand.foundation, foundation);
return true;
}
ssize_t
IceTransport::recv(int comp_id, unsigned char* buf, size_t len, std::error_code& ec)
{
auto &io = pimpl_->compIO_[comp_id];
std::lock_guard<std::mutex> lk(io.mutex);
if (io.queue.empty()) {
ec = std::make_error_code(std::errc::resource_unavailable_try_again); return -1;
}
auto& packet = io.queue.front();
const auto count = std::min(len, packet.data.size());
std::copy_n(packet.data.begin(), count, buf);
if (count == packet.data.size()) {
io.queue.pop_front();
} else {
packet.data.erase(packet.data.begin(), packet.data.begin() + count);
}
ec.clear();
return count;
}
ssize_t
IceTransport::recvfrom(int comp_id, char *buf, size_t len, std::error_code& ec) {
return pimpl_->peerChannels_.at(comp_id).read(buf, len, ec);
}
void
IceTransport::setOnRecv(unsigned comp_id, IceRecvCb cb)
{
auto& io = pimpl_->compIO_[comp_id];
std::lock_guard<std::mutex> lk(io.mutex);
io.cb = cb;
if (cb) {
// Flush existing queue using the callback
for (const auto& packet : io.queue)
io.cb((uint8_t*)packet.data.data(), packet.data.size());
io.queue.clear();
}
}
void
IceTransport::setOnShutdown(onShutdownCb&& cb)
{
pimpl_->scb = cb;
}
ssize_t
IceTransport::send(int comp_id, const unsigned char* buf, size_t len)
{
sip_utils::register_thread();
auto remote = getRemoteAddress(comp_id);
if (!remote) {
JAMI_ERR("[ice:%p] can't find remote address for component %d", this, comp_id);
errno = EINVAL;
return -1;
}
pj_ssize_t sent_size = 0;
auto status = pj_ice_strans_sendto2(pimpl_->icest_.get(), comp_id+1, buf, len, remote.pjPtr(), remote.getLength(), &sent_size);
if (status == PJ_EPENDING && isTCPEnabled()) {
auto current_size = sent_size;
// NOTE; because we are in TCP, the sent size will count the header (2
// bytes length).
while (static_cast<std::size_t>(comp_id) < pimpl_->lastReadLen_.size() && current_size < static_cast<pj_ssize_t>(len)) {
std::unique_lock<std::mutex> lk(pimpl_->iceMutex_);
pimpl_->waitDataCv_.wait(lk);
current_size = pimpl_->lastReadLen_[comp_id];
}
} else if (status != PJ_SUCCESS && status != PJ_EPENDING) {
if (status == PJ_EBUSY) {
errno = EAGAIN;
} else {
pimpl_->last_errmsg_ = sip_utils::sip_strerror(status);
JAMI_ERR("[ice:%p] ice send failed: %s", this, pimpl_->last_errmsg_.c_str()); errno = EIO;
}
return -1;
}
return len;
}
int
IceTransport::waitForInitialization(std::chrono::milliseconds timeout)
{
std::unique_lock<std::mutex> lk(pimpl_->iceMutex_);
if (!pimpl_->iceCV_.wait_for(lk, timeout,
[this]{ return pimpl_->_isInitialized() or pimpl_->_isFailed(); })) {
JAMI_WARN("[ice:%p] waitForInitialization: timeout", this);
return -1;
}
return not pimpl_->_isFailed();
}
int
IceTransport::waitForNegotiation(std::chrono::milliseconds timeout)
{
std::unique_lock<std::mutex> lk(pimpl_->iceMutex_);
if (!pimpl_->iceCV_.wait_for(lk, timeout,
[this]{ return pimpl_->_isRunning() or pimpl_->_isFailed(); })) {
JAMI_WARN("[ice:%p] waitForIceNegotiation: timeout", this);
return -1;
}
return not pimpl_->_isFailed();
}
ssize_t
IceTransport::isDataAvailable(int comp_id)
{
return pimpl_->peerChannels_.at(comp_id).isDataAvailable();
}
ssize_t
IceTransport::waitForData(int comp_id, std::chrono::milliseconds timeout, std::error_code& ec)
{
return pimpl_->peerChannels_.at(comp_id).wait(timeout, ec);
}
std::vector<SDP>
IceTransport::parseSDPList(const std::vector<uint8_t>& msg)
{
std::vector<SDP> sdp_list;
msgpack::unpacker pac;
pac.reserve_buffer(msg.size());
memcpy(pac.buffer(), msg.data(), msg.size());
pac.buffer_consumed(msg.size());
msgpack::object_handle oh;
while (auto result = pac.next(oh)) {
try {
SDP sdp;
if (oh.get().type == msgpack::type::POSITIVE_INTEGER) {
// Version 1
result = pac.next(oh);
if (!result) break;
std::tie(sdp.ufrag, sdp.pwd) = oh.get().as<std::pair<std::string, std::string>>();
result = pac.next(oh);
if (!result) break;
auto comp_cnt = oh.get().as<uint8_t>();
while (comp_cnt-- > 0) {
result = pac.next(oh);
if (!result) break;
auto candidates = oh.get().as<std::vector<std::string>>(); sdp.candidates.reserve(sdp.candidates.size() + candidates.size());
sdp.candidates.insert(sdp.candidates.end(), candidates.begin(), candidates.end());
}
} else {
oh.get().convert(sdp);
}
sdp_list.emplace_back(sdp);
} catch (const msgpack::unpack_error &e) {
break;
}
}
return sdp_list;
}
bool
IceTransport::isTCPEnabled()
{
return pimpl_->config_.protocol == PJ_ICE_TP_TCP;
}
ICESDP
IceTransport::parse_SDP(const std::string& sdp_msg, const IceTransport& ice)
{
ICESDP res;
std::istringstream stream(sdp_msg);
std::string line;
int nr = 0;
while (std::getline(stream, line)) {
if (nr == 0) {
res.rem_ufrag = line;
} else if (nr == 1) {
res.rem_pwd = line;
} else {
IceCandidate cand;
if (ice.getCandidateFromSDP(line, cand)) {
JAMI_DBG("Add remote ICE candidate: %s", line.c_str());
res.rem_candidates.emplace_back(cand);
}
}
nr++;
}
return res;
}
//==============================================================================
IceTransportFactory::IceTransportFactory()
: cp_()
, pool_(nullptr, [](pj_pool_t* pool) { sip_utils::register_thread(); pj_pool_release(pool); })
, ice_cfg_()
{
sip_utils::register_thread();
pj_caching_pool_init(&cp_, NULL, 0);
pool_.reset(pj_pool_create(&cp_.factory, "IceTransportFactory.pool",
512, 512, NULL));
if (not pool_)
throw std::runtime_error("pj_pool_create() failed");
pj_ice_strans_cfg_default(&ice_cfg_);
ice_cfg_.stun_cfg.pf = &cp_.factory;
// v2.4.5 of PJNATH has a default of 100ms but RFC 5389 since version 14 requires
// a minimum of 500ms on fixed-line links. Our usual case is wireless links.
// This solves too long ICE exchange by DHT.
// Using 500ms with default PJ_STUN_MAX_TRANSMIT_COUNT (7) gives around 33s before timeout.
ice_cfg_.stun_cfg.rto_msec = 500;
ice_cfg_.opt.aggressive = PJ_TRUE;
}
IceTransportFactory::~IceTransportFactory()
{
pool_.reset();
pj_caching_pool_destroy(&cp_);
}
std::shared_ptr<IceTransport>
IceTransportFactory::createTransport(const char* name, int component_count,
bool master,
const IceTransportOptions& options)
{
try {
return std::make_shared<IceTransport>(name, component_count, master, options);
} catch(const std::exception& e) {
JAMI_ERR("%s",e.what());
return nullptr;
}
}
std::unique_ptr<IceTransport>
IceTransportFactory::createUTransport(const char* name, int component_count,
bool master,
const IceTransportOptions& options)
{
try {
return std::make_unique<IceTransport>(name, component_count, master, options);
} catch(const std::exception& e) {
JAMI_ERR("%s",e.what());
return nullptr;
}
}
//==============================================================================
void
IceSocketTransport::setOnRecv(RecvCb&& cb)
{
return ice_->setOnRecv(compId_, cb);
}
bool
IceSocketTransport::isInitiator() const
{
return ice_->isInitiator();
}
void
IceSocketTransport::shutdown()
{
ice_->cancelOperations();
}
int
IceSocketTransport::maxPayload() const
{
auto ip_header_size = (ice_->getRemoteAddress(compId_).getFamily() == AF_INET) ?
IPV4_HEADER_SIZE : IPV6_HEADER_SIZE;
return STANDARD_MTU_SIZE - ip_header_size - UDP_HEADER_SIZE;
}
int
IceSocketTransport::waitForData(std::chrono::milliseconds timeout, std::error_code& ec) const
{
if (!ice_->isRunning()) return -1;
return ice_->waitForData(compId_, timeout, ec);
}
std::size_t
IceSocketTransport::write(const ValueType* buf, std::size_t len, std::error_code& ec){
auto res = ice_->send(compId_, buf, len);
if (res < 0) {
ec.assign(errno, std::generic_category());
return 0;
}
ec.clear();
return res;
}
std::size_t
IceSocketTransport::read(ValueType* buf, std::size_t len, std::error_code& ec)
{
if (!ice_->isRunning()) return 0;
try {
auto res = reliable_
? ice_->recvfrom(compId_, reinterpret_cast<char *>(buf), len, ec)
: ice_->recv(compId_, buf, len, ec);
return (res < 0) ? 0 : res;
} catch (const std::exception &e) {
JAMI_ERR("IceSocketTransport::read exception: %s", e.what());
}
return 0;
}
IpAddr
IceSocketTransport::localAddr() const
{
return ice_->getLocalAddress(compId_);
}
IpAddr
IceSocketTransport::remoteAddr() const
{
return ice_->getRemoteAddress(compId_);
}
//==============================================================================
void
IceSocket::close()
{
ice_transport_.reset();
}
ssize_t
IceSocket::send(const unsigned char* buf, size_t len)
{
if (!ice_transport_.get())
return -1;
return ice_transport_->send(compId_, buf, len);
}
ssize_t
IceSocket::waitForData(std::chrono::milliseconds timeout)
{
if (!ice_transport_.get())
return -1;
std::error_code ec;
return ice_transport_->waitForData(compId_, timeout, ec);
}
void
IceSocket::setOnRecv(IceRecvCb cb)
{
if (!ice_transport_.get())
return;
return ice_transport_->setOnRecv(compId_, cb);
}
uint16_t
IceSocket::getTransportOverhead(){
return (ice_transport_->getRemoteAddress(compId_).getFamily() == AF_INET) ? IPV4_HEADER_SIZE : IPV6_HEADER_SIZE;
}
} // namespace jami