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-rw-r--r--kopete/protocols/jabber/jingle/libjingle/talk/base/physicalsocketserver.cpp1116
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
generated by cgit v1.2.1 (git 2.18.0) at 2024-06-29 03:46:49 +0000