diff options
Diffstat (limited to 'src/inspsocket.cpp')
-rw-r--r-- | src/inspsocket.cpp | 567 |
1 files changed, 214 insertions, 353 deletions
diff --git a/src/inspsocket.cpp b/src/inspsocket.cpp index 0350858e7..964582062 100644 --- a/src/inspsocket.cpp +++ b/src/inspsocket.cpp @@ -16,195 +16,100 @@ #include "inspstring.h" #include "socketengine.h" -bool BufferedSocket::Readable() +BufferedSocket::BufferedSocket() { - return (this->state != I_CONNECTING); + Timeout = NULL; + state = I_ERROR; } -BufferedSocket::BufferedSocket(InspIRCd* SI) +BufferedSocket::BufferedSocket(int newfd) { - this->Timeout = NULL; - this->state = I_DISCONNECTED; - this->fd = -1; - this->ServerInstance = SI; -} - -BufferedSocket::BufferedSocket(InspIRCd* SI, int newfd, const char* ip) -{ - this->Timeout = NULL; + Timeout = NULL; this->fd = newfd; this->state = I_CONNECTED; - strlcpy(this->IP,ip,MAXBUF); - this->ServerInstance = SI; - if (this->fd > -1) - this->ServerInstance->SE->AddFd(this); + if (fd > -1) + ServerInstance->SE->AddFd(this); } -BufferedSocket::BufferedSocket(InspIRCd* SI, const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip) +void BufferedSocket::DoConnect(const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip) { - this->cbindip = connectbindip; - this->fd = -1; - this->ServerInstance = SI; - strlcpy(host,ipaddr.c_str(),MAXBUF); - this->Timeout = NULL; - - strlcpy(this->host,ipaddr.c_str(),MAXBUF); - this->port = aport; - - irc::sockets::sockaddrs testaddr; - if (!irc::sockets::aptosa(host, aport, &testaddr)) - { - this->ServerInstance->Logs->Log("SOCKET", DEBUG,"BUG: Hostname passed to BufferedSocket, rather than an IP address!"); - this->OnError(I_ERR_CONNECT); - this->Close(); - this->fd = -1; - this->state = I_ERROR; - return; - } - else + BufferedSocketError err = BeginConnect(ipaddr, aport, maxtime, connectbindip); + if (err != I_ERR_NONE) { - strlcpy(this->IP,host,MAXBUF); - if (!this->DoConnect(maxtime)) - { - this->OnError(I_ERR_CONNECT); - this->Close(); - this->fd = -1; - this->state = I_ERROR; - return; - } + state = I_ERROR; + SetError(strerror(errno)); + OnError(err); } } -void BufferedSocket::SetQueues() +BufferedSocketError BufferedSocket::BeginConnect(const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip) { - // attempt to increase socket sendq and recvq as high as its possible - int sendbuf = 32768; - int recvbuf = 32768; - if(setsockopt(this->fd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf)) || setsockopt(this->fd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(sendbuf))) + irc::sockets::sockaddrs addr, bind; + if (!irc::sockets::aptosa(ipaddr.c_str(), aport, &addr)) { - //this->ServerInstance->Log(DEFAULT, "Could not increase SO_SNDBUF/SO_RCVBUF for socket %u", GetFd()); - ; // do nothing. I'm a little sick of people trying to interpret this message as a result of why their incorrect setups don't work. + ServerInstance->Logs->Log("SOCKET", DEBUG, "BUG: Hostname passed to BufferedSocket, rather than an IP address!"); + return I_ERR_CONNECT; } -} -bool BufferedSocket::DoBindMagic(const std::string ¤t_ip) -{ - irc::sockets::sockaddrs s; - if (!irc::sockets::aptosa(current_ip.c_str(), 0, &s)) + bind.sa.sa_family = 0; + if (!connectbindip.empty()) { - errno = EADDRNOTAVAIL; - return false; - } - - if (ServerInstance->SE->Bind(this->fd, &s.sa, sa_size(s)) < 0) - { - this->state = I_ERROR; - this->OnError(I_ERR_BIND); - return false; + if (!irc::sockets::aptosa(connectbindip.c_str(), 0, &bind)) + { + return I_ERR_BIND; + } } - return true; + return BeginConnect(addr, bind, maxtime); } -/* Most irc servers require you to specify the ip you want to bind to. - * If you dont specify an IP, they rather dumbly bind to the first IP - * of the box (e.g. INADDR_ANY). In InspIRCd, we scan thought the IP - * addresses we've bound server ports to, and we try and bind our outbound - * connections to the first usable non-loopback and non-any IP we find. - * This is easier to configure when you have a lot of links and a lot - * of servers to configure. - */ -bool BufferedSocket::BindAddr(const std::string &ip_to_bind) +static void IncreaseOSBuffers(int fd) { - ConfigReader Conf(this->ServerInstance); - - // Case one: If they provided an IP, try bind it - if (!ip_to_bind.empty()) - { - // And if it fails, don't do anything. - return this->DoBindMagic(ip_to_bind); - } - - for (int j = 0; j < Conf.Enumerate("bind"); j++) - { - // We only want to try bind to a server ip. - if (Conf.ReadValue("bind","type",j) != "servers") - continue; - - // set current IP to the <bind> tag - std::string current_ip = Conf.ReadValue("bind","address",j); - - // Make sure IP is nothing local - if (current_ip == "*" || current_ip == "127.0.0.1" || current_ip.empty() || current_ip == "::1") - continue; - - // Try bind, don't fail if it doesn't bind though. - if (this->DoBindMagic(current_ip)) - return true; - } - - // NOTE: You may wonder WTF we are returning *true* here, but that is because there were no custom binds setup, and so we have nothing to do - // (remember, outgoing connections without binding are perfectly ok). - ServerInstance->Logs->Log("SOCKET", DEBUG,"nothing in the config to bind()!"); - return true; + // attempt to increase socket sendq and recvq as high as its possible + int sendbuf = 32768; + int recvbuf = 32768; + setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf)); + setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(recvbuf)); + // on failure, do nothing. I'm a little sick of people trying to interpret this message as a result of why their incorrect setups don't work. } -bool BufferedSocket::DoConnect(unsigned long maxtime) +BufferedSocketError BufferedSocket::BeginConnect(const irc::sockets::sockaddrs& dest, const irc::sockets::sockaddrs& bind, unsigned long timeout) { - irc::sockets::sockaddrs addr; - irc::sockets::aptosa(this->host, this->port, &addr); - - this->fd = socket(addr.sa.sa_family, SOCK_STREAM, 0); + if (fd < 0) + fd = socket(dest.sa.sa_family, SOCK_STREAM, 0); - if (this->fd == -1) - { - this->state = I_ERROR; - this->OnError(I_ERR_SOCKET); - return false; - } + if (fd < 0) + return I_ERR_SOCKET; - if (!this->BindAddr(this->cbindip)) + if (bind.sa.sa_family != 0) { - this->Close(); - this->fd = -1; - return false; + if (ServerInstance->SE->Bind(fd, &bind.sa, sa_size(bind)) < 0) + return I_ERR_BIND; } - ServerInstance->SE->NonBlocking(this->fd); + ServerInstance->SE->NonBlocking(fd); - if (ServerInstance->SE->Connect(this, &addr.sa, sa_size(addr)) == -1) + if (ServerInstance->SE->Connect(this, &dest.sa, sa_size(dest)) == -1) { if (errno != EINPROGRESS) - { - this->OnError(I_ERR_CONNECT); - this->Close(); - this->state = I_ERROR; - return false; - } - - this->Timeout = new SocketTimeout(this->GetFd(), this->ServerInstance, this, maxtime, this->ServerInstance->Time()); - this->ServerInstance->Timers->AddTimer(this->Timeout); + return I_ERR_CONNECT; } this->state = I_CONNECTING; - if (this->fd > -1) - { - if (!this->ServerInstance->SE->AddFd(this)) - { - this->OnError(I_ERR_NOMOREFDS); - this->Close(); - this->state = I_ERROR; - return false; - } - this->SetQueues(); - } + + if (!ServerInstance->SE->AddFd(this, true)) + return I_ERR_NOMOREFDS; + + this->Timeout = new SocketTimeout(this->GetFd(), this, timeout, ServerInstance->Time()); + ServerInstance->Timers->AddTimer(this->Timeout); + + IncreaseOSBuffers(fd); ServerInstance->Logs->Log("SOCKET", DEBUG,"BufferedSocket::DoConnect success"); - return true; + return I_ERR_NONE; } - -void BufferedSocket::Close() +void StreamSocket::Close() { /* Save this, so we dont lose it, * otherise on failure, error messages @@ -213,190 +118,196 @@ void BufferedSocket::Close() int save = errno; if (this->fd > -1) { - if (this->GetIOHook()) + if (IOHook) { try { - this->GetIOHook()->OnRawSocketClose(this->fd); + IOHook->OnStreamSocketClose(this); } catch (CoreException& modexcept) { - ServerInstance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason()); + ServerInstance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", + modexcept.GetSource(), modexcept.GetReason()); } } ServerInstance->SE->Shutdown(this, 2); - if (ServerInstance->SE->Close(this) != -1) - this->OnClose(); - - if (ServerInstance->SocketCull.find(this) == ServerInstance->SocketCull.end()) - ServerInstance->SocketCull[this] = this; + ServerInstance->SE->DelFd(this); + ServerInstance->SE->Close(this); + fd = -1; } errno = save; } -std::string BufferedSocket::GetIP() +void StreamSocket::cull() { - return this->IP; + Close(); } -const char* BufferedSocket::Read() +bool StreamSocket::GetNextLine(std::string& line, char delim) { - if (!ServerInstance->SE->BoundsCheckFd(this)) - return NULL; - - int n = 0; - char* ReadBuffer = ServerInstance->GetReadBuffer(); + std::string::size_type i = recvq.find(delim); + if (i == std::string::npos) + return false; + line = recvq.substr(0, i - 1); + // TODO is this the most efficient way to split? + recvq = recvq.substr(i + 1); + return true; +} - if (this->GetIOHook()) +void StreamSocket::DoRead() +{ + if (IOHook) { - int result2 = 0; - int MOD_RESULT = 0; + int rv = -1; try { - MOD_RESULT = this->GetIOHook()->OnRawSocketRead(this->fd, ReadBuffer, ServerInstance->Config->NetBufferSize, result2); + rv = IOHook->OnStreamSocketRead(this, recvq); } catch (CoreException& modexcept) { - ServerInstance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason()); + ServerInstance->Logs->Log("SOCKET", DEFAULT, "%s threw an exception: %s", + modexcept.GetSource(), modexcept.GetReason()); + return; } - if (MOD_RESULT < 0) + if (rv > 0) + OnDataReady(); + if (rv < 0) + SetError("Read Error"); // will not overwrite a better error message + } + else + { + char* ReadBuffer = ServerInstance->GetReadBuffer(); + int n = recv(fd, ReadBuffer, ServerInstance->Config->NetBufferSize, 0); + if (n > 0) { - n = -1; - errno = EAGAIN; + recvq.append(ReadBuffer, n); + OnDataReady(); } - else + else if (n == 0) { - n = result2; + error = "Connection closed"; + } + else if (errno != EAGAIN && errno != EINTR) + { + error = strerror(errno); } - } - else - { - n = recv(this->fd, ReadBuffer, ServerInstance->Config->NetBufferSize, 0); - } - - /* - * This used to do some silly bounds checking instead of just passing bufsize - 1 to recv. - * Not only does that make absolutely no sense, but it could potentially result in a read buffer's worth - * of data being thrown into the bit bucket for no good reason, which is just *stupid*.. do things correctly now. - * --w00t (july 2, 2008) - */ - if (n > 0) - { - ReadBuffer[n] = 0; - return ReadBuffer; - } - else - { - int err = errno; - if (err == EAGAIN) - return ""; - else - return NULL; } } -/* - * This function formerly tried to flush write buffer each call. - * While admirable in attempting to get the data out to wherever - * it is going, on a full socket, it's just going to syscall write() and - * EAGAIN constantly, instead of waiting in the SE to know if it can write - * which will chew a bit of CPU. - * - * So, now this function returns void (take note) and just adds to the sendq. - * - * It'll get written at a determinate point when the socketengine tells us it can write. - * -- w00t (april 1, 2008) - */ -void BufferedSocket::Write(const std::string &data) +void StreamSocket::DoWrite() { - /* Append the data to the back of the queue ready for writing */ - outbuffer.push_back(data); - - /* Mark ourselves as wanting write */ - this->ServerInstance->SE->WantWrite(this); -} + if (sendq.empty()) + return; -bool BufferedSocket::FlushWriteBuffer() -{ - errno = 0; - if ((this->fd > -1) && (this->state == I_CONNECTED)) + if (IOHook) { - if (this->GetIOHook()) + int rv = -1; + try { - while (outbuffer.size() && (errno != EAGAIN)) + while (!sendq.empty()) { - try + std::string& front = sendq.front(); + int itemlen = front.length(); + rv = IOHook->OnStreamSocketWrite(this, front); + if (rv > 0) + { + // consumed the entire string, and is ready for more + sendq_len -= itemlen; + sendq.pop_front(); + } + else if (rv == 0) { - /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to - * implement their own buffering mechanisms - */ - this->GetIOHook()->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length()); - outbuffer.pop_front(); + // socket has blocked. Stop trying to send data. + // IOHook has requested unblock notification from the socketengine + + // Since it is possible that a partial write took place, adjust sendq_len + sendq_len = sendq_len - itemlen + front.length(); + return; } - catch (CoreException& modexcept) + else { - ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason()); - return true; + SetError("Write Error"); // will not overwrite a better error message + return; } } } - else + catch (CoreException& modexcept) { - /* If we have multiple lines, try to send them all, - * not just the first one -- Brain - */ - while (outbuffer.size() && (errno != EAGAIN)) + ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", + modexcept.GetSource(), modexcept.GetReason()); + } + } + else + { + // Prepare a writev() call to write all buffers efficiently + int bufcount = sendq.size(); + + // cap the number of buffers at IOV_MAX + if (bufcount > IOV_MAX) + bufcount = IOV_MAX; + + iovec* iovecs = new iovec[bufcount]; + for(int i=0; i < bufcount; i++) + { + iovecs[i].iov_base = const_cast<char*>(sendq[i].data()); + iovecs[i].iov_len = sendq[i].length(); + } + int rv = writev(fd, iovecs, bufcount); + delete[] iovecs; + if (rv == (int)sendq_len) + { + // it's our lucky day, everything got written out. Fast cleanup. + sendq_len = 0; + sendq.clear(); + } + else if (rv > 0) + { + // Partial write. Clean out strings from the sendq + sendq_len -= rv; + while (rv > 0 && !sendq.empty()) { - /* Send a line */ - int result = ServerInstance->SE->Send(this, outbuffer[0].c_str(), outbuffer[0].length(), 0); - - if (result > 0) + std::string& front = sendq.front(); + if (front.length() < (size_t)rv) { - if ((unsigned int)result >= outbuffer[0].length()) - { - /* The whole block was written (usually a line) - * Pop the block off the front of the queue, - * dont set errno, because we are clear of errors - * and want to try and write the next block too. - */ - outbuffer.pop_front(); - } - else - { - std::string temp = outbuffer[0].substr(result); - outbuffer[0] = temp; - /* We didnt get the whole line out. arses. - * Try again next time, i guess. Set errno, - * because we shouldnt be writing any more now, - * until the socketengine says its safe to do so. - */ - errno = EAGAIN; - } + // this string got fully written out + rv -= front.length(); + sendq.pop_front(); } - else if (result == 0) + else { - this->ServerInstance->SE->DelFd(this); - this->Close(); - return true; - } - else if ((result == -1) && (errno != EAGAIN)) - { - this->OnError(I_ERR_WRITE); - this->state = I_ERROR; - this->ServerInstance->SE->DelFd(this); - this->Close(); - return true; + // stopped in the middle of this string + front = front.substr(rv); + rv = 0; } } } + else if (rv == 0) + { + error = "Connection closed"; + } + else if (errno != EAGAIN && errno != EINTR) + { + error = strerror(errno); + } + if (sendq_len && error.empty()) + ServerInstance->SE->WantWrite(this); } +} + +void StreamSocket::WriteData(const std::string &data) +{ + bool newWrite = sendq.empty() && !data.empty(); - if ((errno == EAGAIN) && (fd > -1)) + /* Append the data to the back of the queue ready for writing */ + sendq.push_back(data); + sendq_len += data.length(); + + if (newWrite) { - this->ServerInstance->SE->WantWrite(this); + // TODO perhaps we should try writing first, before asking SE about writes? + // DoWrite(); + ServerInstance->SE->WantWrite(this); } - - return (fd < 0); } void SocketTimeout::Tick(time_t) @@ -421,57 +332,26 @@ void SocketTimeout::Tick(time_t) */ this->sock->state = I_ERROR; - if (ServerInstance->SocketCull.find(this->sock) == ServerInstance->SocketCull.end()) - ServerInstance->SocketCull[this->sock] = this->sock; + ServerInstance->GlobalCulls.AddItem(sock); } this->sock->Timeout = NULL; } -bool BufferedSocket::InternalMarkConnected() -{ - /* Our socket was in write-state, so delete it and re-add it - * in read-state. - */ - this->SetState(I_CONNECTED); +void BufferedSocket::OnConnected() { } +void BufferedSocket::OnTimeout() { return; } - if (this->GetIOHook()) +void BufferedSocket::DoWrite() +{ + if (state == I_CONNECTING) { - ServerInstance->Logs->Log("SOCKET",DEBUG,"Hook for raw connect"); - try - { - this->GetIOHook()->OnRawSocketConnect(this->fd); - } - catch (CoreException& modexcept) - { - ServerInstance->Logs->Log("SOCKET",DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason()); - return false; - } + state = I_CONNECTED; + this->OnConnected(); + if (GetIOHook()) + GetIOHook()->OnStreamSocketConnect(this); } - return this->OnConnected(); -} - -void BufferedSocket::SetState(BufferedSocketState s) -{ - this->state = s; -} - -BufferedSocketState BufferedSocket::GetState() -{ - return this->state; -} - -bool BufferedSocket::OnConnected() { return true; } -void BufferedSocket::OnError(BufferedSocketError) { return; } -int BufferedSocket::OnDisconnect() { return 0; } -bool BufferedSocket::OnDataReady() { return true; } -bool BufferedSocket::OnWriteReady() -{ - // Default behaviour: just try write some. - return !this->FlushWriteBuffer(); + this->StreamSocket::DoWrite(); } -void BufferedSocket::OnTimeout() { return; } -void BufferedSocket::OnClose() { return; } BufferedSocket::~BufferedSocket() { @@ -483,68 +363,49 @@ BufferedSocket::~BufferedSocket() } } -void BufferedSocket::HandleEvent(EventType et, int errornum) +void StreamSocket::HandleEvent(EventType et, int errornum) { + BufferedSocketError errcode = I_ERR_OTHER; switch (et) { case EVENT_ERROR: { + SetError(strerror(errornum)); switch (errornum) { case ETIMEDOUT: - this->OnError(I_ERR_TIMEOUT); + errcode = I_ERR_TIMEOUT; break; case ECONNREFUSED: case 0: - this->OnError(this->state == I_CONNECTING ? I_ERR_CONNECT : I_ERR_WRITE); + errcode = I_ERR_CONNECT; break; case EADDRINUSE: - this->OnError(I_ERR_BIND); + errcode = I_ERR_BIND; break; case EPIPE: case EIO: - this->OnError(I_ERR_WRITE); + errcode = I_ERR_WRITE; break; } - - if (this->ServerInstance->SocketCull.find(this) == this->ServerInstance->SocketCull.end()) - this->ServerInstance->SocketCull[this] = this; - return; break; } case EVENT_READ: { - if (!this->OnDataReady()) - { - if (this->ServerInstance->SocketCull.find(this) == this->ServerInstance->SocketCull.end()) - this->ServerInstance->SocketCull[this] = this; - return; - } + DoRead(); break; } case EVENT_WRITE: { - if (this->state == I_CONNECTING) - { - if (!this->InternalMarkConnected()) - { - if (this->ServerInstance->SocketCull.find(this) == this->ServerInstance->SocketCull.end()) - this->ServerInstance->SocketCull[this] = this; - return; - } - return; - } - else - { - if (!this->OnWriteReady()) - { - if (this->ServerInstance->SocketCull.find(this) == this->ServerInstance->SocketCull.end()) - this->ServerInstance->SocketCull[this] = this; - return; - } - } + DoWrite(); break; } } + if (!error.empty()) + { + ServerInstance->Logs->Log("SOCKET", DEBUG, "Error on FD %d - '%s'", fd, error.c_str()); + OnError(errcode); + ServerInstance->GlobalCulls.AddItem(this); + } } |