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author | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-12-09 14:11:22 +0900 |
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committer | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-12-09 14:17:58 +0900 |
commit | ce469cbad1be7074adbcb346c4aa1acdbfd17a37 (patch) | |
tree | 153a6dd5cc39873d1aa2757e6c1a54271d3e6b11 /kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp | |
parent | 15d37bd9bfff45673d3d106685b051941a14327a (diff) | |
download | tdenetwork-ce469cbad1be7074adbcb346c4aa1acdbfd17a37.tar.gz tdenetwork-ce469cbad1be7074adbcb346c4aa1acdbfd17a37.zip |
Renaming of files in preparation for code style tools.
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit a06e2c2f225d76b67b0058a9880222f75d5495c3)
Diffstat (limited to 'kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp')
-rw-r--r-- | kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp | 1116 |
1 files changed, 1116 insertions, 0 deletions
diff --git a/kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp b/kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp new file mode 100644 index 00000000..37836302 --- /dev/null +++ b/kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp @@ -0,0 +1,1116 @@ +/* + * libjingle + * Copyright 2004--2005, Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#if defined(_MSC_VER) && _MSC_VER < 1300 +#pragma warning(disable:4786) +#endif + +#include <cassert> +#include <algorithm> + +#ifdef POSIX +extern "C" { +#include <errno.h> +#include <fcntl.h> +#include <sys/time.h> +#include <unistd.h> +#include <string.h> +} +#endif + +#include "talk/base/basictypes.h" +#include "talk/base/byteorder.h" +#include "talk/base/common.h" +#include "talk/base/logging.h" +#include "talk/base/physicalsocketserver.h" +#include "talk/base/jtime.h" +#include "talk/base/winping.h" + +#ifdef __linux +#define IP_MTU 14 // Until this is integrated from linux/in.h to netinet/in.h +#endif // __linux + +#ifdef WIN32 +#include <winsock2.h> +#include <ws2tcpip.h> +#define _WINSOCKAPI_ +#include <windows.h> +#undef SetPort + +class WinsockInitializer { +public: + WinsockInitializer() { + WSADATA wsaData; + WORD wVersionRequested = MAKEWORD(1, 0); + err_ = WSAStartup(wVersionRequested, &wsaData); + } + ~WinsockInitializer() { + WSACleanup(); + } + int error() { + return err_; + } +private: + int err_; +}; +WinsockInitializer g_winsockinit; +#endif + +namespace cricket { + +const int kfRead = 0x0001; +const int kfWrite = 0x0002; +const int kfConnect = 0x0004; +const int kfClose = 0x0008; + + +// Standard MTUs +const uint16 PACKET_MAXIMUMS[] = { + 65535, // Theoretical maximum, Hyperchannel + 32000, // Nothing + 17914, // 16Mb IBM Token Ring + 8166, // IEEE 802.4 + //4464, // IEEE 802.5 (4Mb max) + 4352, // FDDI + //2048, // Wideband Network + 2002, // IEEE 802.5 (4Mb recommended) + //1536, // Expermental Ethernet Networks + //1500, // Ethernet, Point-to-Point (default) + 1492, // IEEE 802.3 + 1006, // SLIP, ARPANET + //576, // X.25 Networks + //544, // DEC IP Portal + //512, // NETBIOS + 508, // IEEE 802/Source-Rt Bridge, ARCNET + 296, // Point-to-Point (low delay) + 68, // Official minimum + 0, // End of list marker +}; + +const uint32 IP_HEADER_SIZE = 20; +const uint32 ICMP_HEADER_SIZE = 8; + +class PhysicalSocket : public AsyncSocket { +public: + PhysicalSocket(PhysicalSocketServer* ss, SOCKET s = INVALID_SOCKET) + : ss_(ss), s_(s), enabled_events_(0), error_(0), + state_((s == INVALID_SOCKET) ? CS_CLOSED : CS_CONNECTED) { + if (s != INVALID_SOCKET) + enabled_events_ = kfRead | kfWrite; + } + + virtual ~PhysicalSocket() { + Close(); + } + + // Creates the underlying OS socket (same as the "socket" function). + virtual bool Create(int type) { + Close(); + s_ = ::socket(AF_INET, type, 0); + UpdateLastError(); + enabled_events_ = kfRead | kfWrite; + return s_ != INVALID_SOCKET; + } + + SocketAddress GetLocalAddress() const { + struct sockaddr_in addr; + socklen_t addrlen = sizeof(addr); + int result = ::getsockname(s_, (struct sockaddr*)&addr, &addrlen); + assert(addrlen == sizeof(addr)); + if (result >= 0) { + return SocketAddress(NetworkToHost32(addr.sin_addr.s_addr), + NetworkToHost16(addr.sin_port)); + } else { + return SocketAddress(); + } + } + + SocketAddress GetRemoteAddress() const { + struct sockaddr_in addr; + socklen_t addrlen = sizeof(addr); + int result = ::getpeername(s_, (struct sockaddr*)&addr, &addrlen); + assert(addrlen == sizeof(addr)); + if (result >= 0) { + return SocketAddress( + NetworkToHost32(addr.sin_addr.s_addr), + NetworkToHost16(addr.sin_port)); + } else { + assert(errno == ENOTCONN); + return SocketAddress(); + } + } + + int Bind(const SocketAddress& addr) { + struct sockaddr_in saddr; + IP2SA(&addr, &saddr); + int err = ::bind(s_, (struct sockaddr*)&saddr, sizeof(saddr)); + UpdateLastError(); + return err; + } + + int Connect(const SocketAddress& addr) { + // TODO: Implicit creation is required to reconnect... + // ...but should we make it more explicit? + if ((s_ == INVALID_SOCKET) && !Create(SOCK_STREAM)) + return SOCKET_ERROR; + SocketAddress addr2(addr); + if (addr2.IsUnresolved()) { + LOG(INFO) << "Resolving addr in PhysicalSocket::Connect"; + addr2.Resolve(); // TODO: Do this async later? + } + struct sockaddr_in saddr; + IP2SA(&addr2, &saddr); + int err = ::connect(s_, (struct sockaddr*)&saddr, sizeof(saddr)); + UpdateLastError(); + //LOG(INFO) << "SOCK[" << static_cast<int>(s_) << "] Connect(" << addr2.ToString() << ") Ret: " << err << " Error: " << error_; + if (err == 0) { + state_ = CS_CONNECTED; + } else if (IsBlockingError(error_)) { + state_ = CS_CONNECTING; + enabled_events_ |= kfConnect; + } + return err; + } + + int GetError() const { + return error_; + } + + void SetError(int error) { + error_ = error; + } + + ConnState GetState() const { + return state_; + } + + int SetOption(Option opt, int value) { + assert(opt == OPT_DONTFRAGMENT); +#ifdef WIN32 + value = (value == 0) ? 0 : 1; + return ::setsockopt( + s_, IPPROTO_IP, IP_DONTFRAGMENT, reinterpret_cast<char*>(&value), + sizeof(value)); +#endif +#ifdef __linux + value = (value == 0) ? IP_PMTUDISC_DONT : IP_PMTUDISC_DO; + return ::setsockopt( + s_, IPPROTO_IP, IP_MTU_DISCOVER, &value, sizeof(value)); +#endif +#ifdef OSX + // This is not possible on OSX. + return -1; +#endif + } + + int Send(const void *pv, size_t cb) { + int sent = ::send(s_, reinterpret_cast<const char *>(pv), (int)cb, 0); + UpdateLastError(); + //LOG(INFO) << "SOCK[" << static_cast<int>(s_) << "] Send(" << cb << ") Ret: " << sent << " Error: " << error_; + ASSERT(sent <= static_cast<int>(cb)); // We have seen minidumps where this may be false + if ((sent < 0) && IsBlockingError(error_)) { + enabled_events_ |= kfWrite; + } + return sent; + } + + int SendTo(const void *pv, size_t cb, const SocketAddress& addr) { + struct sockaddr_in saddr; + IP2SA(&addr, &saddr); + int sent = ::sendto( + s_, (const char *)pv, (int)cb, 0, (struct sockaddr*)&saddr, + sizeof(saddr)); + UpdateLastError(); + ASSERT(sent <= static_cast<int>(cb)); // We have seen minidumps where this may be false + if ((sent < 0) && IsBlockingError(error_)) { + enabled_events_ |= kfWrite; + } + return sent; + } + + int Recv(void *pv, size_t cb) { + int received = ::recv(s_, (char *)pv, (int)cb, 0); + UpdateLastError(); + if ((received >= 0) || IsBlockingError(error_)) { + enabled_events_ |= kfRead; + } + return received; + } + + int RecvFrom(void *pv, size_t cb, SocketAddress *paddr) { + struct sockaddr saddr; + socklen_t cbAddr = sizeof(saddr); + int received = ::recvfrom(s_, (char *)pv, (int)cb, 0, &saddr, &cbAddr); + UpdateLastError(); + if ((received >= 0) && (paddr != NULL)) + SA2IP(&saddr, paddr); + if ((received >= 0) || IsBlockingError(error_)) { + enabled_events_ |= kfRead; + } + return received; + } + + int Listen(int backlog) { + int err = ::listen(s_, backlog); + UpdateLastError(); + if (err == 0) + state_ = CS_CONNECTING; + return err; + } + + Socket* Accept(SocketAddress *paddr) { + struct sockaddr saddr; + socklen_t cbAddr = sizeof(saddr); + SOCKET s = ::accept(s_, &saddr, &cbAddr); + UpdateLastError(); + if (s == INVALID_SOCKET) + return NULL; + if (paddr != NULL) + SA2IP(&saddr, paddr); + return ss_->WrapSocket(s); + } + + int Close() { + if (s_ == INVALID_SOCKET) + return 0; + int err = ::closesocket(s_); + UpdateLastError(); + //LOG(INFO) << "SOCK[" << static_cast<int>(s_) << "] Close() Ret: " << err << " Error: " << error_; + s_ = INVALID_SOCKET; + state_ = CS_CLOSED; + enabled_events_ = 0; + return err; + } + + int EstimateMTU(uint16* mtu) { + SocketAddress addr = GetRemoteAddress(); + if (addr.IsAny()) { + error_ = ENOTCONN; + return -1; + } + +#ifdef WIN32 + + WinPing ping; + if (!ping.IsValid()) { + error_ = EINVAL; // can't think of a better error ID + return -1; + } + + for (int level = 0; PACKET_MAXIMUMS[level + 1] > 0; ++level) { + int32 size = PACKET_MAXIMUMS[level] - IP_HEADER_SIZE - ICMP_HEADER_SIZE; + if (ping.Ping(addr.ip(), size, 0, 1, false) != WinPing::PING_TOO_LARGE) { + *mtu = PACKET_MAXIMUMS[level]; + return 0; + } + } + + assert(false); + return 0; + +#endif // WIN32 + +#ifdef __linux + + int value; + socklen_t vlen = sizeof(value); + int err = getsockopt(s_, IPPROTO_IP, IP_MTU, &value, &vlen); + if (err < 0) { + UpdateLastError(); + return err; + } + + assert((0 <= value) && (value <= 65536)); + *mtu = uint16(value); + return 0; + +#endif // __linux + + // TODO: OSX support + } + + SocketServer* socketserver() { return ss_; } + +protected: + PhysicalSocketServer* ss_; + SOCKET s_; + uint32 enabled_events_; + int error_; + ConnState state_; + + void UpdateLastError() { +#ifdef WIN32 + error_ = WSAGetLastError(); +#endif +#ifdef POSIX + error_ = errno; +#endif + } + + void IP2SA(const SocketAddress *paddr, struct sockaddr_in *psaddr) { + memset(psaddr, 0, sizeof(*psaddr)); + psaddr->sin_family = AF_INET; + psaddr->sin_port = HostToNetwork16(paddr->port()); + if (paddr->ip() == 0) + psaddr->sin_addr.s_addr = INADDR_ANY; + else + psaddr->sin_addr.s_addr = HostToNetwork32(paddr->ip()); + } + + void SA2IP(const struct sockaddr *psaddr, SocketAddress *paddr) { + const struct sockaddr_in *psaddr_in = + reinterpret_cast<const struct sockaddr_in*>(psaddr); + paddr->SetIP(NetworkToHost32(psaddr_in->sin_addr.s_addr)); + paddr->SetPort(NetworkToHost16(psaddr_in->sin_port)); + } +}; + +#ifdef POSIX +class Dispatcher { +public: + virtual uint32 GetRequestedEvents() = 0; + virtual void OnPreEvent(uint32 ff) = 0; + virtual void OnEvent(uint32 ff, int err) = 0; + virtual int GetDescriptor() = 0; +}; + +class EventDispatcher : public Dispatcher { +public: + EventDispatcher(PhysicalSocketServer* ss) : ss_(ss), fSignaled_(false) { + if (pipe(afd_) < 0) + LOG(LERROR) << "pipe failed"; + ss_->Add(this); + } + + virtual ~EventDispatcher() { + ss_->Remove(this); + close(afd_[0]); + close(afd_[1]); + } + + virtual void Signal() { + CritScope cs(&crit_); + if (!fSignaled_) { + uint8 b = 0; + if (write(afd_[1], &b, sizeof(b)) < 0) + LOG(LERROR) << "write failed"; + fSignaled_ = true; + } + } + + virtual uint32 GetRequestedEvents() { + return kfRead; + } + + virtual void OnPreEvent(uint32 ff) { + // It is not possible to perfectly emulate an auto-resetting event with + // pipes. This simulates it by resetting before the event is handled. + + CritScope cs(&crit_); + if (fSignaled_) { + uint8 b; + read(afd_[0], &b, sizeof(b)); + fSignaled_ = false; + } + } + + virtual void OnEvent(uint32 ff, int err) { + assert(false); + } + + virtual int GetDescriptor() { + return afd_[0]; + } + +private: + PhysicalSocketServer *ss_; + int afd_[2]; + bool fSignaled_; + CriticalSection crit_; +}; + +class SocketDispatcher : public Dispatcher, public PhysicalSocket { +public: + SocketDispatcher(PhysicalSocketServer *ss) : PhysicalSocket(ss) { + ss_->Add(this); + } + SocketDispatcher(SOCKET s, PhysicalSocketServer *ss) : PhysicalSocket(ss, s) { + ss_->Add(this); + } + + virtual ~SocketDispatcher() { + ss_->Remove(this); + } + + bool Initialize() { + fcntl(s_, F_SETFL, fcntl(s_, F_GETFL, 0) | O_NONBLOCK); + return true; + } + + virtual bool Create(int type) { + // Change the socket to be non-blocking. + if (!PhysicalSocket::Create(type)) + return false; + + return Initialize(); + } + + virtual int GetDescriptor() { + return s_; + } + + virtual uint32 GetRequestedEvents() { + return enabled_events_; + } + + virtual void OnPreEvent(uint32 ff) { + } + + virtual void OnEvent(uint32 ff, int err) { + if ((ff & kfRead) != 0) { + enabled_events_ &= ~kfRead; + SignalReadEvent(this); + } + if ((ff & kfWrite) != 0) { + enabled_events_ &= ~kfWrite; + SignalWriteEvent(this); + } + if ((ff & kfConnect) != 0) { + enabled_events_ &= ~kfConnect; + SignalConnectEvent(this); + } + if ((ff & kfClose) != 0) + SignalCloseEvent(this, err); + } +}; + +class FileDispatcher: public Dispatcher, public AsyncFile { +public: + FileDispatcher(int fd, PhysicalSocketServer *ss) : ss_(ss), fd_(fd) { + set_readable(true); + + ss_->Add(this); + + fcntl(fd_, F_SETFL, fcntl(fd_, F_GETFL, 0) | O_NONBLOCK); + } + + virtual ~FileDispatcher() { + ss_->Remove(this); + } + + SocketServer* socketserver() { return ss_; } + + virtual int GetDescriptor() { + return fd_; + } + + virtual uint32 GetRequestedEvents() { + return flags_; + } + + virtual void OnPreEvent(uint32 ff) { + } + + virtual void OnEvent(uint32 ff, int err) { + if ((ff & kfRead) != 0) + SignalReadEvent(this); + if ((ff & kfWrite) != 0) + SignalWriteEvent(this); + if ((ff & kfClose) != 0) + SignalCloseEvent(this, err); + } + + virtual bool readable() { + return (flags_ & kfRead) != 0; + } + + virtual void set_readable(bool value) { + flags_ = value ? (flags_ | kfRead) : (flags_ & ~kfRead); + } + + virtual bool writable() { + return (flags_ & kfWrite) != 0; + } + + virtual void set_writable(bool value) { + flags_ = value ? (flags_ | kfWrite) : (flags_ & ~kfWrite); + } + +private: + PhysicalSocketServer* ss_; + int fd_; + int flags_; +}; + +AsyncFile* PhysicalSocketServer::CreateFile(int fd) { + return new FileDispatcher(fd, this); +} + +#endif // POSIX + +#ifdef WIN32 +class Dispatcher { +public: + virtual uint32 GetRequestedEvents() = 0; + virtual void OnPreEvent(uint32 ff) = 0; + virtual void OnEvent(uint32 ff, int err) = 0; + virtual WSAEVENT GetWSAEvent() = 0; + virtual SOCKET GetSocket() = 0; + virtual bool CheckSignalClose() = 0; +}; + +uint32 FlagsToEvents(uint32 events) { + uint32 ffFD = FD_CLOSE | FD_ACCEPT; + if (events & kfRead) + ffFD |= FD_READ; + if (events & kfWrite) + ffFD |= FD_WRITE; + if (events & kfConnect) + ffFD |= FD_CONNECT; + return ffFD; +} + +class EventDispatcher : public Dispatcher { +public: + EventDispatcher(PhysicalSocketServer *ss) : ss_(ss) { + if (hev_ = WSACreateEvent()) { + ss_->Add(this); + } + } + + ~EventDispatcher() { + if (hev_ != NULL) { + ss_->Remove(this); + WSACloseEvent(hev_); + hev_ = NULL; + } + } + + virtual void Signal() { + if (hev_ != NULL) + WSASetEvent(hev_); + } + + virtual uint32 GetRequestedEvents() { + return 0; + } + + virtual void OnPreEvent(uint32 ff) { + WSAResetEvent(hev_); + } + + virtual void OnEvent(uint32 ff, int err) { + } + + virtual WSAEVENT GetWSAEvent() { + return hev_; + } + + virtual SOCKET GetSocket() { + return INVALID_SOCKET; + } + + virtual bool CheckSignalClose() { return false; } + +private: + PhysicalSocketServer* ss_; + WSAEVENT hev_; +}; + +class SocketDispatcher : public Dispatcher, public PhysicalSocket { +public: + static int next_id_; + int id_; + bool signal_close_; + int signal_err_; + + SocketDispatcher(PhysicalSocketServer* ss) : PhysicalSocket(ss), id_(0), signal_close_(false) { + } + SocketDispatcher(SOCKET s, PhysicalSocketServer* ss) : PhysicalSocket(ss, s), id_(0), signal_close_(false) { + } + + virtual ~SocketDispatcher() { + Close(); + } + + bool Initialize() { + assert(s_ != INVALID_SOCKET); + // Must be a non-blocking + u_long argp = 1; + ioctlsocket(s_, FIONBIO, &argp); + ss_->Add(this); + return true; + } + + virtual bool Create(int type) { + // Create socket + if (!PhysicalSocket::Create(type)) + return false; + + if (!Initialize()) + return false; + + do { id_ = ++next_id_; } while (id_ == 0); + return true; + } + + virtual int Close() { + if (s_ == INVALID_SOCKET) + return 0; + + id_ = 0; + signal_close_ = false; + ss_->Remove(this); + return PhysicalSocket::Close(); + } + + virtual uint32 GetRequestedEvents() { + return enabled_events_; + } + + virtual void OnPreEvent(uint32 ff) { + if ((ff & kfConnect) != 0) + state_ = CS_CONNECTED; + } + + virtual void OnEvent(uint32 ff, int err) { + int cache_id = id_; + if ((ff & kfRead) != 0) { + enabled_events_ &= ~kfRead; + SignalReadEvent(this); + } + if (((ff & kfWrite) != 0) && (id_ == cache_id)) { + enabled_events_ &= ~kfWrite; + SignalWriteEvent(this); + } + if (((ff & kfConnect) != 0) && (id_ == cache_id)) { + enabled_events_ &= ~kfConnect; + SignalConnectEvent(this); + } + if (((ff & kfClose) != 0) && (id_ == cache_id)) { + //LOG(INFO) << "SOCK[" << static_cast<int>(s_) << "] OnClose() Error: " << err; + signal_close_ = true; + signal_err_ = err; + } + } + + virtual WSAEVENT GetWSAEvent() { + return WSA_INVALID_EVENT; + } + + virtual SOCKET GetSocket() { + return s_; + } + + virtual bool CheckSignalClose() { + if (!signal_close_) + return false; + + char ch; + if (recv(s_, &ch, 1, MSG_PEEK) > 0) + return false; + + signal_close_ = false; + SignalCloseEvent(this, signal_err_); + return true; + } +}; + +int SocketDispatcher::next_id_ = 0; + +#endif // WIN32 + +// Sets the value of a boolean value to false when signaled. +class Signaler : public EventDispatcher { +public: + Signaler(PhysicalSocketServer* ss, bool* pf) + : EventDispatcher(ss), pf_(pf) { + } + virtual ~Signaler() { } + + void OnEvent(uint32 ff, int err) { + if (pf_) + *pf_ = false; + } + +private: + bool *pf_; +}; + +PhysicalSocketServer::PhysicalSocketServer() : fWait_(false), + last_tick_tracked_(0), last_tick_dispatch_count_(0) { + signal_wakeup_ = new Signaler(this, &fWait_); +} + +PhysicalSocketServer::~PhysicalSocketServer() { + delete signal_wakeup_; +} + +void PhysicalSocketServer::WakeUp() { + signal_wakeup_->Signal(); +} + +Socket* PhysicalSocketServer::CreateSocket(int type) { + PhysicalSocket* socket = new PhysicalSocket(this); + if (socket->Create(type)) { + return socket; + } else { + delete socket; + return 0; + } +} + +AsyncSocket* PhysicalSocketServer::CreateAsyncSocket(int type) { + SocketDispatcher* dispatcher = new SocketDispatcher(this); + if (dispatcher->Create(type)) { + return dispatcher; + } else { + delete dispatcher; + return 0; + } +} + +AsyncSocket* PhysicalSocketServer::WrapSocket(SOCKET s) { + SocketDispatcher* dispatcher = new SocketDispatcher(s, this); + if (dispatcher->Initialize()) { + return dispatcher; + } else { + delete dispatcher; + return 0; + } +} + +void PhysicalSocketServer::Add(Dispatcher *pdispatcher) { + CritScope cs(&crit_); + dispatchers_.push_back(pdispatcher); +} + +void PhysicalSocketServer::Remove(Dispatcher *pdispatcher) { + CritScope cs(&crit_); + dispatchers_.erase(std::remove(dispatchers_.begin(), dispatchers_.end(), pdispatcher), dispatchers_.end()); +} + +#ifdef POSIX +bool PhysicalSocketServer::Wait(int cmsWait, bool process_io) { + // Calculate timing information + + struct timeval *ptvWait = NULL; + struct timeval tvWait; + struct timeval tvStop; + if (cmsWait != -1) { + // Calculate wait timeval + tvWait.tv_sec = cmsWait / 1000; + tvWait.tv_usec = (cmsWait % 1000) * 1000; + ptvWait = &tvWait; + + // Calculate when to return in a timeval + gettimeofday(&tvStop, NULL); + tvStop.tv_sec += tvWait.tv_sec; + tvStop.tv_usec += tvWait.tv_usec; + if (tvStop.tv_usec >= 1000000) { + tvStop.tv_usec -= 1000000; + tvStop.tv_sec += 1; + } + } + + // Zero all fd_sets. Don't need to do this inside the loop since + // select() zeros the descriptors not signaled + + fd_set fdsRead; + FD_ZERO(&fdsRead); + fd_set fdsWrite; + FD_ZERO(&fdsWrite); + + fWait_ = true; + + while (fWait_) { + int fdmax = -1; + { + CritScope cr(&crit_); + for (unsigned i = 0; i < dispatchers_.size(); i++) { + // Query dispatchers for read and write wait state + + Dispatcher *pdispatcher = dispatchers_[i]; + assert(pdispatcher); + if (!process_io && (pdispatcher != signal_wakeup_)) + continue; + int fd = pdispatcher->GetDescriptor(); + if (fd > fdmax) + fdmax = fd; + uint32 ff = pdispatcher->GetRequestedEvents(); + if (ff & kfRead) + FD_SET(fd, &fdsRead); + if (ff & (kfWrite | kfConnect)) + FD_SET(fd, &fdsWrite); + } + } + + // Wait then call handlers as appropriate + // < 0 means error + // 0 means timeout + // > 0 means count of descriptors ready + int n = select(fdmax + 1, &fdsRead, &fdsWrite, NULL, ptvWait); + + // If error, return error + // todo: do something intelligent + + if (n < 0) + return false; + + // If timeout, return success + + if (n == 0) + return true; + + // We have signaled descriptors + + { + CritScope cr(&crit_); + for (unsigned i = 0; i < dispatchers_.size(); i++) { + Dispatcher *pdispatcher = dispatchers_[i]; + int fd = pdispatcher->GetDescriptor(); + uint32 ff = 0; + if (FD_ISSET(fd, &fdsRead)) { + FD_CLR(fd, &fdsRead); + ff |= kfRead; + } + if (FD_ISSET(fd, &fdsWrite)) { + FD_CLR(fd, &fdsWrite); + if (pdispatcher->GetRequestedEvents() & kfConnect) { + ff |= kfConnect; + } else { + ff |= kfWrite; + } + } + if (ff != 0) { + pdispatcher->OnPreEvent(ff); + pdispatcher->OnEvent(ff, 0); + } + } + } + + // Recalc the time remaining to wait. Doing it here means it doesn't get + // calced twice the first time through the loop + + if (cmsWait != -1) { + ptvWait->tv_sec = 0; + ptvWait->tv_usec = 0; + struct timeval tvT; + gettimeofday(&tvT, NULL); + if (tvStop.tv_sec >= tvT.tv_sec) { + ptvWait->tv_sec = tvStop.tv_sec - tvT.tv_sec; + ptvWait->tv_usec = tvStop.tv_usec - tvT.tv_usec; + if (ptvWait->tv_usec < 0) { + ptvWait->tv_usec += 1000000; + ptvWait->tv_sec -= 1; + } + } + } + } + + return true; +} +#endif // POSIX + +#ifdef WIN32 +bool PhysicalSocketServer::Wait(int cmsWait, bool process_io) +{ + int cmsTotal = cmsWait; + int cmsElapsed = 0; + uint32 msStart = GetMillisecondCount(); + +#if LOGGING + if (last_tick_dispatch_count_ == 0) { + last_tick_tracked_ = msStart; + } +#endif + + WSAEVENT socket_ev = WSACreateEvent(); + + fWait_ = true; + while (fWait_) { + std::vector<WSAEVENT> events; + std::vector<Dispatcher *> event_owners; + + events.push_back(socket_ev); + + { + CritScope cr(&crit_); + for (size_t i = 0; i < dispatchers_.size(); ++i) { + Dispatcher * disp = dispatchers_[i]; + if (!process_io && (disp != signal_wakeup_)) + continue; + SOCKET s = disp->GetSocket(); + if (disp->CheckSignalClose()) { + // We just signalled close, don't poll this socket + } else if (s != INVALID_SOCKET) { + WSAEventSelect(s, events[0], FlagsToEvents(disp->GetRequestedEvents())); + } else { + events.push_back(disp->GetWSAEvent()); + event_owners.push_back(disp); + } + } + } + + // Which is shorter, the delay wait or the asked wait? + + int cmsNext; + if (cmsWait == -1) { + cmsNext = cmsWait; + } else { + cmsNext = cmsTotal - cmsElapsed; + if (cmsNext < 0) + cmsNext = 0; + } + + // Wait for one of the events to signal + DWORD dw = WSAWaitForMultipleEvents(static_cast<DWORD>(events.size()), &events[0], false, cmsNext, false); + +#if 0 // LOGGING + // we track this information purely for logging purposes. + last_tick_dispatch_count_++; + if (last_tick_dispatch_count_ >= 1000) { + uint32 now = GetMillisecondCount(); + LOG(INFO) << "PhysicalSocketServer took " << TimeDiff(now, last_tick_tracked_) << "ms for 1000 events"; + + // If we get more than 1000 events in a second, we are spinning badly + // (normally it should take about 8-20 seconds). + assert(TimeDiff(now, last_tick_tracked_) > 1000); + + last_tick_tracked_ = now; + last_tick_dispatch_count_ = 0; + } +#endif + + // Failed? + // todo: need a better strategy than this! + + if (dw == WSA_WAIT_FAILED) { + int error = WSAGetLastError(); + assert(false); + WSACloseEvent(socket_ev); + return false; + } + + // Timeout? + + if (dw == WSA_WAIT_TIMEOUT) { + WSACloseEvent(socket_ev); + return true; + } + + // Figure out which one it is and call it + + { + CritScope cr(&crit_); + int index = dw - WSA_WAIT_EVENT_0; + if (index > 0) { + --index; // The first event is the socket event + event_owners[index]->OnPreEvent(0); + event_owners[index]->OnEvent(0, 0); + } else if (process_io) { + for (size_t i = 0; i < dispatchers_.size(); ++i) { + Dispatcher * disp = dispatchers_[i]; + SOCKET s = disp->GetSocket(); + if (s == INVALID_SOCKET) + continue; + + WSANETWORKEVENTS wsaEvents; + int err = WSAEnumNetworkEvents(s, events[0], &wsaEvents); + if (err == 0) { + +#if LOGGING + { + if ((wsaEvents.lNetworkEvents & FD_READ) && wsaEvents.iErrorCode[FD_READ_BIT] != 0) { + LOG(WARNING) << "PhysicalSocketServer got FD_READ_BIT error " << wsaEvents.iErrorCode[FD_READ_BIT]; + } + if ((wsaEvents.lNetworkEvents & FD_WRITE) && wsaEvents.iErrorCode[FD_WRITE_BIT] != 0) { + LOG(WARNING) << "PhysicalSocketServer got FD_WRITE_BIT error " << wsaEvents.iErrorCode[FD_WRITE_BIT]; + } + if ((wsaEvents.lNetworkEvents & FD_CONNECT) && wsaEvents.iErrorCode[FD_CONNECT_BIT] != 0) { + LOG(WARNING) << "PhysicalSocketServer got FD_CONNECT_BIT error " << wsaEvents.iErrorCode[FD_CONNECT_BIT]; + } + if ((wsaEvents.lNetworkEvents & FD_ACCEPT) && wsaEvents.iErrorCode[FD_ACCEPT_BIT] != 0) { + LOG(WARNING) << "PhysicalSocketServer got FD_ACCEPT_BIT error " << wsaEvents.iErrorCode[FD_ACCEPT_BIT]; + } + if ((wsaEvents.lNetworkEvents & FD_CLOSE) && wsaEvents.iErrorCode[FD_CLOSE_BIT] != 0) { + LOG(WARNING) << "PhysicalSocketServer got FD_CLOSE_BIT error " << wsaEvents.iErrorCode[FD_CLOSE_BIT]; + } + } +#endif + uint32 ff = 0; + int errcode = 0; + if (wsaEvents.lNetworkEvents & FD_READ) + ff |= kfRead; + if (wsaEvents.lNetworkEvents & FD_WRITE) + ff |= kfWrite; + if (wsaEvents.lNetworkEvents & FD_CONNECT) { + if (wsaEvents.iErrorCode[FD_CONNECT_BIT] == 0) { + ff |= kfConnect; + } else { + // TODO: Decide whether we want to signal connect, but with an error code + ff |= kfClose; + errcode = wsaEvents.iErrorCode[FD_CONNECT_BIT]; + } + } + if (wsaEvents.lNetworkEvents & FD_ACCEPT) + ff |= kfRead; + if (wsaEvents.lNetworkEvents & FD_CLOSE) { + ff |= kfClose; + errcode = wsaEvents.iErrorCode[FD_CLOSE_BIT]; + } + if (ff != 0) { + disp->OnPreEvent(ff); + disp->OnEvent(ff, errcode); + } + } + } + } + + // Reset the network event until new activity occurs + WSAResetEvent(socket_ev); + } + + // Break? + + if (!fWait_) + break; + cmsElapsed = GetMillisecondCount() - msStart; + if (cmsWait != -1) { + if (cmsElapsed >= cmsWait) + break; + } + } + + // Done + + WSACloseEvent(socket_ev); + return true; +} +#endif // WIN32 + +} // namespace cricket |