Refactor write and read into functions
This commit is contained in:
Jerry (Xinyu Hou)
Andrew Nelless
parent
436e333f6f
commit
61b489ab3d
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@ -323,6 +323,179 @@ TCPSocket::init()
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}
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}
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TCPSocket::EJobResult
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TCPSocket::doRead()
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{
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try {
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static UInt8 buffer[4096];
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memset(buffer, 0, sizeof(buffer));
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int bytesRead = 0;
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int status = 0;
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if (isSecure()) {
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if (isSecureReady()) {
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status = secureRead(buffer, sizeof(buffer), bytesRead);
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if (status < 0) {
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return kBreak;
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}
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else if (status == 0) {
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return kNew;
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}
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}
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else {
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return kRetry;
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}
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}
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else {
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bytesRead = (int) ARCH->readSocket(m_socket, buffer, sizeof(buffer));
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}
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if (bytesRead > 0) {
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bool wasEmpty = (m_inputBuffer.getSize() == 0);
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// slurp up as much as possible
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do {
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m_inputBuffer.write(buffer, bytesRead);
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if (isSecure() && isSecureReady()) {
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status = secureRead(buffer, sizeof(buffer), bytesRead);
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if (status < 0) {
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return kBreak;
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}
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}
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else {
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bytesRead = (int) ARCH->readSocket(m_socket, buffer, sizeof(buffer));
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}
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} while (bytesRead > 0 || status > 0);
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// send input ready if input buffer was empty
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if (wasEmpty) {
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sendEvent(m_events->forIStream().inputReady());
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}
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}
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else {
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// remote write end of stream hungup. our input side
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// has therefore shutdown but don't flush our buffer
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// since there's still data to be read.
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sendEvent(m_events->forIStream().inputShutdown());
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if (!m_writable && m_inputBuffer.getSize() == 0) {
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sendEvent(m_events->forISocket().disconnected());
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m_connected = false;
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}
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m_readable = false;
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return kNew;
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}
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}
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catch (XArchNetworkDisconnected&) {
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// stream hungup
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sendEvent(m_events->forISocket().disconnected());
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onDisconnected();
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return kNew;
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}
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catch (XArchNetwork& e) {
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// ignore other read error
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LOG((CLOG_WARN "error reading socket: %s", e.what()));
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}
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return kRetry;
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}
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TCPSocket::EJobResult
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TCPSocket::doWrite()
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{
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static bool s_retry = false;
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static int s_retrySize = 0;
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static void* s_staticBuffer = NULL;
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try {
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// write data
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int bufferSize = 0;
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int bytesWrote = 0;
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int status = 0;
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if (s_retry) {
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bufferSize = s_retrySize;
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}
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else {
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bufferSize = m_outputBuffer.getSize();
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s_staticBuffer = malloc(bufferSize);
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memcpy(s_staticBuffer, m_outputBuffer.peek(bufferSize), bufferSize);
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}
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if (bufferSize == 0) {
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return kRetry;
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}
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if (isSecure()) {
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if (isSecureReady()) {
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status = secureWrite(s_staticBuffer, bufferSize, bytesWrote);
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if (status > 0) {
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s_retry = false;
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bufferSize = 0;
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free(s_staticBuffer);
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s_staticBuffer = NULL;
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}
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else if (status < 0) {
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return kBreak;
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}
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else if (status == 0) {
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s_retry = true;
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s_retrySize = bufferSize;
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return kNew;
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}
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}
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else {
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return kRetry;
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}
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}
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else {
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bytesWrote = (UInt32)ARCH->writeSocket(m_socket, s_staticBuffer, bufferSize);
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bufferSize = 0;
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free(s_staticBuffer);
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s_staticBuffer = NULL;
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}
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// discard written data
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if (bytesWrote > 0) {
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m_outputBuffer.pop(bytesWrote);
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if (m_outputBuffer.getSize() == 0) {
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sendEvent(m_events->forIStream().outputFlushed());
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m_flushed = true;
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m_flushed.broadcast();
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return kNew;
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}
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}
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}
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catch (XArchNetworkShutdown&) {
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// remote read end of stream hungup. our output side
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// has therefore shutdown.
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onOutputShutdown();
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sendEvent(m_events->forIStream().outputShutdown());
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if (!m_readable && m_inputBuffer.getSize() == 0) {
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sendEvent(m_events->forISocket().disconnected());
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m_connected = false;
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}
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return kNew;
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}
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catch (XArchNetworkDisconnected&) {
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// stream hungup
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onDisconnected();
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sendEvent(m_events->forISocket().disconnected());
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return kNew;
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}
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catch (XArchNetwork& e) {
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// other write error
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LOG((CLOG_WARN "error writing socket: %s", e.what()));
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onDisconnected();
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sendEvent(m_events->forIStream().outputError());
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sendEvent(m_events->forISocket().disconnected());
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return kNew;
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}
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return kRetry;
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}
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void
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TCPSocket::setJob(ISocketMultiplexerJob* job)
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{
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@ -468,172 +641,14 @@ TCPSocket::serviceConnected(ISocketMultiplexerJob* job,
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return newJob();
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}
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bool needNewJob = false;
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static bool s_retry = false;
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static int s_retrySize = 0;
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static void* s_staticBuffer = NULL;
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EJobResult result = kRetry;
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if (write) {
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try {
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// write data
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int bufferSize = 0;
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int bytesWrote = 0;
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int status = 0;
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if (s_retry) {
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bufferSize = s_retrySize;
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}
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else {
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bufferSize = m_outputBuffer.getSize();
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s_staticBuffer = malloc(bufferSize);
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memcpy(s_staticBuffer, m_outputBuffer.peek(bufferSize), bufferSize);
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}
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if (bufferSize == 0) {
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return job;
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}
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if (isSecure()) {
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if (isSecureReady()) {
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status = secureWrite(s_staticBuffer, bufferSize, bytesWrote);
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if (status > 0) {
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s_retry = false;
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bufferSize = 0;
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free(s_staticBuffer);
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s_staticBuffer = NULL;
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}
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else if (status < 0) {
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return NULL;
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}
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else if (status == 0) {
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s_retry = true;
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s_retrySize = bufferSize;
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return newJob();
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}
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}
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else {
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return job;
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}
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}
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else {
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bytesWrote = (UInt32)ARCH->writeSocket(m_socket, s_staticBuffer, bufferSize);
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bufferSize = 0;
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free(s_staticBuffer);
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s_staticBuffer = NULL;
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}
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// discard written data
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if (bytesWrote > 0) {
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m_outputBuffer.pop(bytesWrote);
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if (m_outputBuffer.getSize() == 0) {
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sendEvent(m_events->forIStream().outputFlushed());
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m_flushed = true;
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m_flushed.broadcast();
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needNewJob = true;
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}
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}
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}
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catch (XArchNetworkShutdown&) {
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// remote read end of stream hungup. our output side
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// has therefore shutdown.
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onOutputShutdown();
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sendEvent(m_events->forIStream().outputShutdown());
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if (!m_readable && m_inputBuffer.getSize() == 0) {
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sendEvent(m_events->forISocket().disconnected());
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m_connected = false;
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}
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needNewJob = true;
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}
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catch (XArchNetworkDisconnected&) {
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// stream hungup
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onDisconnected();
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sendEvent(m_events->forISocket().disconnected());
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needNewJob = true;
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}
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catch (XArchNetwork& e) {
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// other write error
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LOG((CLOG_WARN "error writing socket: %s", e.what()));
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onDisconnected();
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sendEvent(m_events->forIStream().outputError());
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sendEvent(m_events->forISocket().disconnected());
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needNewJob = true;
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}
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result = doWrite();
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}
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if (read && m_readable) {
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try {
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static UInt8 buffer[4096];
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memset(buffer, 0, sizeof(buffer));
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int bytesRead = 0;
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int status = 0;
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if (isSecure()) {
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if (isSecureReady()) {
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status = secureRead(buffer, sizeof(buffer), bytesRead);
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if (status < 0) {
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return NULL;
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}
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else if (status == 0) {
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return newJob();
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}
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}
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else {
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return job;
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}
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}
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else {
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bytesRead = (int) ARCH->readSocket(m_socket, buffer, sizeof(buffer));
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}
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if (bytesRead > 0) {
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bool wasEmpty = (m_inputBuffer.getSize() == 0);
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// slurp up as much as possible
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do {
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m_inputBuffer.write(buffer, bytesRead);
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if (isSecure() && isSecureReady()) {
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status = secureRead(buffer, sizeof(buffer), bytesRead);
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if (status < 0) {
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return NULL;
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}
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}
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else {
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bytesRead = (int) ARCH->readSocket(m_socket, buffer, sizeof(buffer));
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}
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} while (bytesRead > 0 || status > 0);
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// send input ready if input buffer was empty
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if (wasEmpty) {
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sendEvent(m_events->forIStream().inputReady());
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}
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}
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else {
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// remote write end of stream hungup. our input side
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// has therefore shutdown but don't flush our buffer
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// since there's still data to be read.
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sendEvent(m_events->forIStream().inputShutdown());
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if (!m_writable && m_inputBuffer.getSize() == 0) {
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sendEvent(m_events->forISocket().disconnected());
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m_connected = false;
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}
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m_readable = false;
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needNewJob = true;
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}
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}
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catch (XArchNetworkDisconnected&) {
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// stream hungup
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sendEvent(m_events->forISocket().disconnected());
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onDisconnected();
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needNewJob = true;
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}
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catch (XArchNetwork& e) {
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// ignore other read error
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LOG((CLOG_WARN "error reading socket: %s", e.what()));
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}
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result = doRead();
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}
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return needNewJob ? newJob() : job;
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return result == kBreak ? NULL : result == kNew ? newJob() : job;
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}
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@ -66,12 +66,20 @@ public:
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virtual void setFingerprintFilename(String& f) {}
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protected:
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enum EJobResult {
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kBreak = -1, //!< Break the Job chain
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kRetry, //!< Retry the same job
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kNew //!< Require a new job
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};
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ArchSocket getSocket() { return m_socket; }
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IEventQueue* getEvents() { return m_events; }
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virtual bool isSecureReady() { return false; }
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virtual bool isSecure() { return false; }
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virtual int secureRead(void* buffer, int, int& ) { return 0; }
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virtual int secureWrite(const void*, int, int& ) { return 0; }
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virtual EJobResult doRead();
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virtual EJobResult doWrite();
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void setJob(ISocketMultiplexerJob*);
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