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author | Howaner <franzi.moos@googlemail.com> | 2015-03-09 22:39:11 +0100 |
---|---|---|
committer | Howaner <franzi.moos@googlemail.com> | 2015-03-09 22:39:11 +0100 |
commit | a96c21fc0d4326ffda93cc78c5dfcfc4bd034e24 (patch) | |
tree | 38dba8f86163283d90d1d6d9d2fa420cb4e99231 /src/OSSupport/TCPLinkImpl.cpp | |
parent | Readded old comment (diff) | |
parent | Fixed client kick/crash if many block changes happend (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/OSSupport/TCPLinkImpl.cpp | 69 |
1 files changed, 58 insertions, 11 deletions
diff --git a/src/OSSupport/TCPLinkImpl.cpp b/src/OSSupport/TCPLinkImpl.cpp index f97db7582..c6f1978ad 100644 --- a/src/OSSupport/TCPLinkImpl.cpp +++ b/src/OSSupport/TCPLinkImpl.cpp @@ -7,6 +7,7 @@ #include "TCPLinkImpl.h" #include "NetworkSingleton.h" #include "ServerHandleImpl.h" +#include "event2/buffer.h" @@ -17,7 +18,10 @@ cTCPLinkImpl::cTCPLinkImpl(cTCPLink::cCallbacksPtr a_LinkCallbacks): super(a_LinkCallbacks), - m_BufferEvent(bufferevent_socket_new(cNetworkSingleton::Get().GetEventBase(), -1, BEV_OPT_CLOSE_ON_FREE | BEV_OPT_THREADSAFE)) + m_BufferEvent(bufferevent_socket_new(cNetworkSingleton::Get().GetEventBase(), -1, BEV_OPT_CLOSE_ON_FREE | BEV_OPT_THREADSAFE)), + m_LocalPort(0), + m_RemotePort(0), + m_ShouldShutdown(false) { LOGD("Created new cTCPLinkImpl at %p with BufferEvent at %p", this, m_BufferEvent); } @@ -29,7 +33,10 @@ cTCPLinkImpl::cTCPLinkImpl(cTCPLink::cCallbacksPtr a_LinkCallbacks): cTCPLinkImpl::cTCPLinkImpl(evutil_socket_t a_Socket, cTCPLink::cCallbacksPtr a_LinkCallbacks, cServerHandleImplPtr a_Server, const sockaddr * a_Address, socklen_t a_AddrLen): super(a_LinkCallbacks), m_BufferEvent(bufferevent_socket_new(cNetworkSingleton::Get().GetEventBase(), a_Socket, BEV_OPT_CLOSE_ON_FREE | BEV_OPT_THREADSAFE)), - m_Server(a_Server) + m_Server(a_Server), + m_LocalPort(0), + m_RemotePort(0), + m_ShouldShutdown(false) { LOGD("Created new cTCPLinkImpl at %p with BufferEvent at %p", this, m_BufferEvent); @@ -111,7 +118,7 @@ void cTCPLinkImpl::Enable(cTCPLinkImplPtr a_Self) m_Self = a_Self; // Set the LibEvent callbacks and enable processing: - bufferevent_setcb(m_BufferEvent, ReadCallback, nullptr, EventCallback, this); + bufferevent_setcb(m_BufferEvent, ReadCallback, WriteCallback, EventCallback, this); bufferevent_enable(m_BufferEvent, EV_READ | EV_WRITE); } @@ -121,6 +128,11 @@ void cTCPLinkImpl::Enable(cTCPLinkImplPtr a_Self) bool cTCPLinkImpl::Send(const void * a_Data, size_t a_Length) { + if (m_ShouldShutdown) + { + LOGD("%s: Cannot send data, the link is already shut down.", __FUNCTION__); + return false; + } return (bufferevent_write(m_BufferEvent, a_Data, a_Length) == 0); } @@ -130,12 +142,15 @@ bool cTCPLinkImpl::Send(const void * a_Data, size_t a_Length) void cTCPLinkImpl::Shutdown(void) { - #ifdef _WIN32 - shutdown(bufferevent_getfd(m_BufferEvent), SD_SEND); - #else - shutdown(bufferevent_getfd(m_BufferEvent), SHUT_WR); - #endif - bufferevent_disable(m_BufferEvent, EV_WRITE); + // If there's no outgoing data, shutdown the socket directly: + if (evbuffer_get_length(bufferevent_get_output(m_BufferEvent)) == 0) + { + DoActualShutdown(); + return; + } + + // There's still outgoing data in the LibEvent buffer, schedule a shutdown when it's written to OS's TCP stack: + m_ShouldShutdown = true; } @@ -181,6 +196,24 @@ void cTCPLinkImpl::ReadCallback(bufferevent * a_BufferEvent, void * a_Self) +void cTCPLinkImpl::WriteCallback(bufferevent * a_BufferEvent, void * a_Self) +{ + ASSERT(a_Self != nullptr); + auto Self = static_cast<cTCPLinkImpl *>(a_Self); + ASSERT(Self->m_Callbacks != nullptr); + + // If there's no more data to write and the link has been scheduled for shutdown, do the shutdown: + auto OutLen = evbuffer_get_length(bufferevent_get_output(Self->m_BufferEvent)); + if ((OutLen == 0) && (Self->m_ShouldShutdown)) + { + Self->DoActualShutdown(); + } +} + + + + + void cTCPLinkImpl::EventCallback(bufferevent * a_BufferEvent, short a_What, void * a_Self) { LOGD("cTCPLink event callback for link %p, BEV %p; what = 0x%02x", a_Self, a_BufferEvent, a_What); @@ -221,6 +254,8 @@ void cTCPLinkImpl::EventCallback(bufferevent * a_BufferEvent, short a_What, void // Pending connection succeeded, call the connection callback: if (a_What & BEV_EVENT_CONNECTED) { + Self->UpdateLocalAddress(); + Self->UpdateRemoteAddress(); if (Self->m_ConnectCallbacks != nullptr) { Self->m_ConnectCallbacks->OnConnected(*Self); @@ -228,8 +263,6 @@ void cTCPLinkImpl::EventCallback(bufferevent * a_BufferEvent, short a_What, void Self->m_ConnectCallbacks.reset(); return; } - Self->UpdateLocalAddress(); - Self->UpdateRemoteAddress(); } // If the connection has been closed, call the link callback and remove the connection: @@ -316,6 +349,20 @@ void cTCPLinkImpl::UpdateRemoteAddress(void) +void cTCPLinkImpl::DoActualShutdown(void) +{ + #ifdef _WIN32 + shutdown(bufferevent_getfd(m_BufferEvent), SD_SEND); + #else + shutdown(bufferevent_getfd(m_BufferEvent), SHUT_WR); + #endif + bufferevent_disable(m_BufferEvent, EV_WRITE); +} + + + + + //////////////////////////////////////////////////////////////////////////////// // cNetwork API: |