diff options
Diffstat (limited to 'media/libstagefright/foundation/ANetworkSession.cpp')
| -rw-r--r-- | media/libstagefright/foundation/ANetworkSession.cpp | 1412 |
1 files changed, 1412 insertions, 0 deletions
diff --git a/media/libstagefright/foundation/ANetworkSession.cpp b/media/libstagefright/foundation/ANetworkSession.cpp new file mode 100644 index 0000000..e629588 --- /dev/null +++ b/media/libstagefright/foundation/ANetworkSession.cpp @@ -0,0 +1,1412 @@ +/* + * Copyright 2012, The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +//#define LOG_NDEBUG 0 +#define LOG_TAG "NetworkSession" +#include <utils/Log.h> + +#include "ANetworkSession.h" +#include "ParsedMessage.h" + +#include <arpa/inet.h> +#include <fcntl.h> +#include <linux/tcp.h> +#include <net/if.h> +#include <netdb.h> +#include <netinet/in.h> +#include <sys/ioctl.h> +#include <sys/socket.h> + +#include <media/stagefright/foundation/ABuffer.h> +#include <media/stagefright/foundation/ADebug.h> +#include <media/stagefright/foundation/AMessage.h> +#include <media/stagefright/foundation/hexdump.h> + +namespace android { + +static uint16_t U16_AT(const uint8_t *ptr) { + return ptr[0] << 8 | ptr[1]; +} + +static uint32_t U32_AT(const uint8_t *ptr) { + return ptr[0] << 24 | ptr[1] << 16 | ptr[2] << 8 | ptr[3]; +} + +static uint64_t U64_AT(const uint8_t *ptr) { + return ((uint64_t)U32_AT(ptr)) << 32 | U32_AT(ptr + 4); +} + +static const size_t kMaxUDPSize = 1500; +static const int32_t kMaxUDPRetries = 200; + +struct ANetworkSession::NetworkThread : public Thread { + NetworkThread(ANetworkSession *session); + +protected: + virtual ~NetworkThread(); + +private: + ANetworkSession *mSession; + + virtual bool threadLoop(); + + DISALLOW_EVIL_CONSTRUCTORS(NetworkThread); +}; + +struct ANetworkSession::Session : public RefBase { + enum Mode { + MODE_RTSP, + MODE_DATAGRAM, + MODE_WEBSOCKET, + }; + + enum State { + CONNECTING, + CONNECTED, + LISTENING_RTSP, + LISTENING_TCP_DGRAMS, + DATAGRAM, + }; + + Session(int32_t sessionID, + State state, + int s, + const sp<AMessage> ¬ify); + + int32_t sessionID() const; + int socket() const; + sp<AMessage> getNotificationMessage() const; + + bool isRTSPServer() const; + bool isTCPDatagramServer() const; + + bool wantsToRead(); + bool wantsToWrite(); + + status_t readMore(); + status_t writeMore(); + + status_t sendRequest( + const void *data, ssize_t size, bool timeValid, int64_t timeUs); + + void setMode(Mode mode); + + status_t switchToWebSocketMode(); + +protected: + virtual ~Session(); + +private: + enum { + FRAGMENT_FLAG_TIME_VALID = 1, + }; + struct Fragment { + uint32_t mFlags; + int64_t mTimeUs; + sp<ABuffer> mBuffer; + }; + + int32_t mSessionID; + State mState; + Mode mMode; + int mSocket; + sp<AMessage> mNotify; + bool mSawReceiveFailure, mSawSendFailure; + int32_t mUDPRetries; + + List<Fragment> mOutFragments; + + AString mInBuffer; + + int64_t mLastStallReportUs; + + void notifyError(bool send, status_t err, const char *detail); + void notify(NotificationReason reason); + + void dumpFragmentStats(const Fragment &frag); + + DISALLOW_EVIL_CONSTRUCTORS(Session); +}; +//////////////////////////////////////////////////////////////////////////////// + +ANetworkSession::NetworkThread::NetworkThread(ANetworkSession *session) + : mSession(session) { +} + +ANetworkSession::NetworkThread::~NetworkThread() { +} + +bool ANetworkSession::NetworkThread::threadLoop() { + mSession->threadLoop(); + + return true; +} + +//////////////////////////////////////////////////////////////////////////////// + +ANetworkSession::Session::Session( + int32_t sessionID, + State state, + int s, + const sp<AMessage> ¬ify) + : mSessionID(sessionID), + mState(state), + mMode(MODE_DATAGRAM), + mSocket(s), + mNotify(notify), + mSawReceiveFailure(false), + mSawSendFailure(false), + mUDPRetries(kMaxUDPRetries), + mLastStallReportUs(-1ll) { + if (mState == CONNECTED) { + struct sockaddr_in localAddr; + socklen_t localAddrLen = sizeof(localAddr); + + int res = getsockname( + mSocket, (struct sockaddr *)&localAddr, &localAddrLen); + CHECK_GE(res, 0); + + struct sockaddr_in remoteAddr; + socklen_t remoteAddrLen = sizeof(remoteAddr); + + res = getpeername( + mSocket, (struct sockaddr *)&remoteAddr, &remoteAddrLen); + CHECK_GE(res, 0); + + in_addr_t addr = ntohl(localAddr.sin_addr.s_addr); + AString localAddrString = StringPrintf( + "%d.%d.%d.%d", + (addr >> 24), + (addr >> 16) & 0xff, + (addr >> 8) & 0xff, + addr & 0xff); + + addr = ntohl(remoteAddr.sin_addr.s_addr); + AString remoteAddrString = StringPrintf( + "%d.%d.%d.%d", + (addr >> 24), + (addr >> 16) & 0xff, + (addr >> 8) & 0xff, + addr & 0xff); + + sp<AMessage> msg = mNotify->dup(); + msg->setInt32("sessionID", mSessionID); + msg->setInt32("reason", kWhatClientConnected); + msg->setString("server-ip", localAddrString.c_str()); + msg->setInt32("server-port", ntohs(localAddr.sin_port)); + msg->setString("client-ip", remoteAddrString.c_str()); + msg->setInt32("client-port", ntohs(remoteAddr.sin_port)); + msg->post(); + } +} + +ANetworkSession::Session::~Session() { + ALOGV("Session %d gone", mSessionID); + + close(mSocket); + mSocket = -1; +} + +int32_t ANetworkSession::Session::sessionID() const { + return mSessionID; +} + +int ANetworkSession::Session::socket() const { + return mSocket; +} + +void ANetworkSession::Session::setMode(Mode mode) { + mMode = mode; +} + +status_t ANetworkSession::Session::switchToWebSocketMode() { + if (mState != CONNECTED || mMode != MODE_RTSP) { + return INVALID_OPERATION; + } + + mMode = MODE_WEBSOCKET; + + return OK; +} + +sp<AMessage> ANetworkSession::Session::getNotificationMessage() const { + return mNotify; +} + +bool ANetworkSession::Session::isRTSPServer() const { + return mState == LISTENING_RTSP; +} + +bool ANetworkSession::Session::isTCPDatagramServer() const { + return mState == LISTENING_TCP_DGRAMS; +} + +bool ANetworkSession::Session::wantsToRead() { + return !mSawReceiveFailure && mState != CONNECTING; +} + +bool ANetworkSession::Session::wantsToWrite() { + return !mSawSendFailure + && (mState == CONNECTING + || (mState == CONNECTED && !mOutFragments.empty()) + || (mState == DATAGRAM && !mOutFragments.empty())); +} + +status_t ANetworkSession::Session::readMore() { + if (mState == DATAGRAM) { + CHECK_EQ(mMode, MODE_DATAGRAM); + + status_t err; + do { + sp<ABuffer> buf = new ABuffer(kMaxUDPSize); + + struct sockaddr_in remoteAddr; + socklen_t remoteAddrLen = sizeof(remoteAddr); + + ssize_t n; + do { + n = recvfrom( + mSocket, buf->data(), buf->capacity(), 0, + (struct sockaddr *)&remoteAddr, &remoteAddrLen); + } while (n < 0 && errno == EINTR); + + err = OK; + if (n < 0) { + err = -errno; + } else if (n == 0) { + err = -ECONNRESET; + } else { + buf->setRange(0, n); + + int64_t nowUs = ALooper::GetNowUs(); + buf->meta()->setInt64("arrivalTimeUs", nowUs); + + sp<AMessage> notify = mNotify->dup(); + notify->setInt32("sessionID", mSessionID); + notify->setInt32("reason", kWhatDatagram); + + uint32_t ip = ntohl(remoteAddr.sin_addr.s_addr); + notify->setString( + "fromAddr", + StringPrintf( + "%u.%u.%u.%u", + ip >> 24, + (ip >> 16) & 0xff, + (ip >> 8) & 0xff, + ip & 0xff).c_str()); + + notify->setInt32("fromPort", ntohs(remoteAddr.sin_port)); + + notify->setBuffer("data", buf); + notify->post(); + } + } while (err == OK); + + if (err == -EAGAIN) { + err = OK; + } + + if (err != OK) { + if (!mUDPRetries) { + notifyError(false /* send */, err, "Recvfrom failed."); + mSawReceiveFailure = true; + } else { + mUDPRetries--; + ALOGE("Recvfrom failed, %d/%d retries left", + mUDPRetries, kMaxUDPRetries); + err = OK; + } + } else { + mUDPRetries = kMaxUDPRetries; + } + + return err; + } + + char tmp[512]; + ssize_t n; + do { + n = recv(mSocket, tmp, sizeof(tmp), 0); + } while (n < 0 && errno == EINTR); + + status_t err = OK; + + if (n > 0) { + mInBuffer.append(tmp, n); + +#if 0 + ALOGI("in:"); + hexdump(tmp, n); +#endif + } else if (n < 0) { + err = -errno; + } else { + err = -ECONNRESET; + } + + if (mMode == MODE_DATAGRAM) { + // TCP stream carrying 16-bit length-prefixed datagrams. + + while (mInBuffer.size() >= 2) { + size_t packetSize = U16_AT((const uint8_t *)mInBuffer.c_str()); + + if (mInBuffer.size() < packetSize + 2) { + break; + } + + sp<ABuffer> packet = new ABuffer(packetSize); + memcpy(packet->data(), mInBuffer.c_str() + 2, packetSize); + + int64_t nowUs = ALooper::GetNowUs(); + packet->meta()->setInt64("arrivalTimeUs", nowUs); + + sp<AMessage> notify = mNotify->dup(); + notify->setInt32("sessionID", mSessionID); + notify->setInt32("reason", kWhatDatagram); + notify->setBuffer("data", packet); + notify->post(); + + mInBuffer.erase(0, packetSize + 2); + } + } else if (mMode == MODE_RTSP) { + for (;;) { + size_t length; + + if (mInBuffer.size() > 0 && mInBuffer.c_str()[0] == '$') { + if (mInBuffer.size() < 4) { + break; + } + + length = U16_AT((const uint8_t *)mInBuffer.c_str() + 2); + + if (mInBuffer.size() < 4 + length) { + break; + } + + sp<AMessage> notify = mNotify->dup(); + notify->setInt32("sessionID", mSessionID); + notify->setInt32("reason", kWhatBinaryData); + notify->setInt32("channel", mInBuffer.c_str()[1]); + + sp<ABuffer> data = new ABuffer(length); + memcpy(data->data(), mInBuffer.c_str() + 4, length); + + int64_t nowUs = ALooper::GetNowUs(); + data->meta()->setInt64("arrivalTimeUs", nowUs); + + notify->setBuffer("data", data); + notify->post(); + + mInBuffer.erase(0, 4 + length); + continue; + } + + sp<ParsedMessage> msg = + ParsedMessage::Parse( + mInBuffer.c_str(), mInBuffer.size(), err != OK, &length); + + if (msg == NULL) { + break; + } + + sp<AMessage> notify = mNotify->dup(); + notify->setInt32("sessionID", mSessionID); + notify->setInt32("reason", kWhatData); + notify->setObject("data", msg); + notify->post(); + +#if 1 + // XXX The (old) dongle sends the wrong content length header on a + // SET_PARAMETER request that signals a "wfd_idr_request". + // (17 instead of 19). + const char *content = msg->getContent(); + if (content + && !memcmp(content, "wfd_idr_request\r\n", 17) + && length >= 19 + && mInBuffer.c_str()[length] == '\r' + && mInBuffer.c_str()[length + 1] == '\n') { + length += 2; + } +#endif + + mInBuffer.erase(0, length); + + if (err != OK) { + break; + } + } + } else { + CHECK_EQ(mMode, MODE_WEBSOCKET); + + const uint8_t *data = (const uint8_t *)mInBuffer.c_str(); + // hexdump(data, mInBuffer.size()); + + while (mInBuffer.size() >= 2) { + size_t offset = 2; + + unsigned payloadLen = data[1] & 0x7f; + if (payloadLen == 126) { + if (offset + 2 > mInBuffer.size()) { + break; + } + + payloadLen = U16_AT(&data[offset]); + offset += 2; + } else if (payloadLen == 127) { + if (offset + 8 > mInBuffer.size()) { + break; + } + + payloadLen = U64_AT(&data[offset]); + offset += 8; + } + + uint32_t mask = 0; + if (data[1] & 0x80) { + // MASK==1 + if (offset + 4 > mInBuffer.size()) { + break; + } + + mask = U32_AT(&data[offset]); + offset += 4; + } + + if (offset + payloadLen > mInBuffer.size()) { + break; + } + + // We have the full message. + + sp<ABuffer> packet = new ABuffer(payloadLen); + memcpy(packet->data(), &data[offset], payloadLen); + + if (mask != 0) { + for (size_t i = 0; i < payloadLen; ++i) { + packet->data()[i] = + data[offset + i] + ^ ((mask >> (8 * (3 - (i % 4)))) & 0xff); + } + } + + sp<AMessage> notify = mNotify->dup(); + notify->setInt32("sessionID", mSessionID); + notify->setInt32("reason", kWhatWebSocketMessage); + notify->setBuffer("data", packet); + notify->setInt32("headerByte", data[0]); + notify->post(); + + mInBuffer.erase(0, offset + payloadLen); + } + } + + if (err != OK) { + notifyError(false /* send */, err, "Recv failed."); + mSawReceiveFailure = true; + } + + return err; +} + +void ANetworkSession::Session::dumpFragmentStats(const Fragment &frag) { +#if 0 + int64_t nowUs = ALooper::GetNowUs(); + int64_t delayMs = (nowUs - frag.mTimeUs) / 1000ll; + + static const int64_t kMinDelayMs = 0; + static const int64_t kMaxDelayMs = 300; + + const char *kPattern = "########################################"; + size_t kPatternSize = strlen(kPattern); + + int n = (kPatternSize * (delayMs - kMinDelayMs)) + / (kMaxDelayMs - kMinDelayMs); + + if (n < 0) { + n = 0; + } else if ((size_t)n > kPatternSize) { + n = kPatternSize; + } + + ALOGI("[%lld]: (%4lld ms) %s\n", + frag.mTimeUs / 1000, + delayMs, + kPattern + kPatternSize - n); +#endif +} + +status_t ANetworkSession::Session::writeMore() { + if (mState == DATAGRAM) { + CHECK(!mOutFragments.empty()); + + status_t err; + do { + const Fragment &frag = *mOutFragments.begin(); + const sp<ABuffer> &datagram = frag.mBuffer; + + int n; + do { + n = send(mSocket, datagram->data(), datagram->size(), 0); + } while (n < 0 && errno == EINTR); + + err = OK; + + if (n > 0) { + if (frag.mFlags & FRAGMENT_FLAG_TIME_VALID) { + dumpFragmentStats(frag); + } + + mOutFragments.erase(mOutFragments.begin()); + } else if (n < 0) { + err = -errno; + } else if (n == 0) { + err = -ECONNRESET; + } + } while (err == OK && !mOutFragments.empty()); + + if (err == -EAGAIN) { + if (!mOutFragments.empty()) { + ALOGI("%d datagrams remain queued.", mOutFragments.size()); + } + err = OK; + } + + if (err != OK) { + if (!mUDPRetries) { + notifyError(true /* send */, err, "Send datagram failed."); + mSawSendFailure = true; + } else { + mUDPRetries--; + ALOGE("Send datagram failed, %d/%d retries left", + mUDPRetries, kMaxUDPRetries); + err = OK; + } + } else { + mUDPRetries = kMaxUDPRetries; + } + + return err; + } + + if (mState == CONNECTING) { + int err; + socklen_t optionLen = sizeof(err); + CHECK_EQ(getsockopt(mSocket, SOL_SOCKET, SO_ERROR, &err, &optionLen), 0); + CHECK_EQ(optionLen, (socklen_t)sizeof(err)); + + if (err != 0) { + notifyError(kWhatError, -err, "Connection failed"); + mSawSendFailure = true; + + return -err; + } + + mState = CONNECTED; + notify(kWhatConnected); + + return OK; + } + + CHECK_EQ(mState, CONNECTED); + CHECK(!mOutFragments.empty()); + + ssize_t n; + while (!mOutFragments.empty()) { + const Fragment &frag = *mOutFragments.begin(); + + do { + n = send(mSocket, frag.mBuffer->data(), frag.mBuffer->size(), 0); + } while (n < 0 && errno == EINTR); + + if (n <= 0) { + break; + } + + frag.mBuffer->setRange( + frag.mBuffer->offset() + n, frag.mBuffer->size() - n); + + if (frag.mBuffer->size() > 0) { + break; + } + + if (frag.mFlags & FRAGMENT_FLAG_TIME_VALID) { + dumpFragmentStats(frag); + } + + mOutFragments.erase(mOutFragments.begin()); + } + + status_t err = OK; + + if (n < 0) { + err = -errno; + } else if (n == 0) { + err = -ECONNRESET; + } + + if (err != OK) { + notifyError(true /* send */, err, "Send failed."); + mSawSendFailure = true; + } + +#if 0 + int numBytesQueued; + int res = ioctl(mSocket, SIOCOUTQ, &numBytesQueued); + if (res == 0 && numBytesQueued > 50 * 1024) { + if (numBytesQueued > 409600) { + ALOGW("!!! numBytesQueued = %d", numBytesQueued); + } + + int64_t nowUs = ALooper::GetNowUs(); + + if (mLastStallReportUs < 0ll + || nowUs > mLastStallReportUs + 100000ll) { + sp<AMessage> msg = mNotify->dup(); + msg->setInt32("sessionID", mSessionID); + msg->setInt32("reason", kWhatNetworkStall); + msg->setSize("numBytesQueued", numBytesQueued); + msg->post(); + + mLastStallReportUs = nowUs; + } + } +#endif + + return err; +} + +status_t ANetworkSession::Session::sendRequest( + const void *data, ssize_t size, bool timeValid, int64_t timeUs) { + CHECK(mState == CONNECTED || mState == DATAGRAM); + + if (size < 0) { + size = strlen((const char *)data); + } + + if (size == 0) { + return OK; + } + + sp<ABuffer> buffer; + + if (mState == CONNECTED && mMode == MODE_DATAGRAM) { + CHECK_LE(size, 65535); + + buffer = new ABuffer(size + 2); + buffer->data()[0] = size >> 8; + buffer->data()[1] = size & 0xff; + memcpy(buffer->data() + 2, data, size); + } else if (mState == CONNECTED && mMode == MODE_WEBSOCKET) { + static const bool kUseMask = false; // Chromium doesn't like it. + + size_t numHeaderBytes = 2 + (kUseMask ? 4 : 0); + if (size > 65535) { + numHeaderBytes += 8; + } else if (size > 125) { + numHeaderBytes += 2; + } + + buffer = new ABuffer(numHeaderBytes + size); + buffer->data()[0] = 0x81; // FIN==1 | opcode=1 (text) + buffer->data()[1] = kUseMask ? 0x80 : 0x00; + + if (size > 65535) { + buffer->data()[1] |= 127; + buffer->data()[2] = 0x00; + buffer->data()[3] = 0x00; + buffer->data()[4] = 0x00; + buffer->data()[5] = 0x00; + buffer->data()[6] = (size >> 24) & 0xff; + buffer->data()[7] = (size >> 16) & 0xff; + buffer->data()[8] = (size >> 8) & 0xff; + buffer->data()[9] = size & 0xff; + } else if (size > 125) { + buffer->data()[1] |= 126; + buffer->data()[2] = (size >> 8) & 0xff; + buffer->data()[3] = size & 0xff; + } else { + buffer->data()[1] |= size; + } + + if (kUseMask) { + uint32_t mask = rand(); + + buffer->data()[numHeaderBytes - 4] = (mask >> 24) & 0xff; + buffer->data()[numHeaderBytes - 3] = (mask >> 16) & 0xff; + buffer->data()[numHeaderBytes - 2] = (mask >> 8) & 0xff; + buffer->data()[numHeaderBytes - 1] = mask & 0xff; + + for (size_t i = 0; i < (size_t)size; ++i) { + buffer->data()[numHeaderBytes + i] = + ((const uint8_t *)data)[i] + ^ ((mask >> (8 * (3 - (i % 4)))) & 0xff); + } + } else { + memcpy(buffer->data() + numHeaderBytes, data, size); + } + } else { + buffer = new ABuffer(size); + memcpy(buffer->data(), data, size); + } + + Fragment frag; + + frag.mFlags = 0; + if (timeValid) { + frag.mFlags = FRAGMENT_FLAG_TIME_VALID; + frag.mTimeUs = timeUs; + } + + frag.mBuffer = buffer; + + mOutFragments.push_back(frag); + + return OK; +} + +void ANetworkSession::Session::notifyError( + bool send, status_t err, const char *detail) { + sp<AMessage> msg = mNotify->dup(); + msg->setInt32("sessionID", mSessionID); + msg->setInt32("reason", kWhatError); + msg->setInt32("send", send); + msg->setInt32("err", err); + msg->setString("detail", detail); + msg->post(); +} + +void ANetworkSession::Session::notify(NotificationReason reason) { + sp<AMessage> msg = mNotify->dup(); + msg->setInt32("sessionID", mSessionID); + msg->setInt32("reason", reason); + msg->post(); +} + +//////////////////////////////////////////////////////////////////////////////// + +ANetworkSession::ANetworkSession() + : mNextSessionID(1) { + mPipeFd[0] = mPipeFd[1] = -1; +} + +ANetworkSession::~ANetworkSession() { + stop(); +} + +status_t ANetworkSession::start() { + if (mThread != NULL) { + return INVALID_OPERATION; + } + + int res = pipe(mPipeFd); + if (res != 0) { + mPipeFd[0] = mPipeFd[1] = -1; + return -errno; + } + + mThread = new NetworkThread(this); + + status_t err = mThread->run("ANetworkSession", ANDROID_PRIORITY_AUDIO); + + if (err != OK) { + mThread.clear(); + + close(mPipeFd[0]); + close(mPipeFd[1]); + mPipeFd[0] = mPipeFd[1] = -1; + + return err; + } + + return OK; +} + +status_t ANetworkSession::stop() { + if (mThread == NULL) { + return INVALID_OPERATION; + } + + mThread->requestExit(); + interrupt(); + mThread->requestExitAndWait(); + + mThread.clear(); + + close(mPipeFd[0]); + close(mPipeFd[1]); + mPipeFd[0] = mPipeFd[1] = -1; + + return OK; +} + +status_t ANetworkSession::createRTSPClient( + const char *host, unsigned port, const sp<AMessage> ¬ify, + int32_t *sessionID) { + return createClientOrServer( + kModeCreateRTSPClient, + NULL /* addr */, + 0 /* port */, + host, + port, + notify, + sessionID); +} + +status_t ANetworkSession::createRTSPServer( + const struct in_addr &addr, unsigned port, + const sp<AMessage> ¬ify, int32_t *sessionID) { + return createClientOrServer( + kModeCreateRTSPServer, + &addr, + port, + NULL /* remoteHost */, + 0 /* remotePort */, + notify, + sessionID); +} + +status_t ANetworkSession::createUDPSession( + unsigned localPort, const sp<AMessage> ¬ify, int32_t *sessionID) { + return createUDPSession(localPort, NULL, 0, notify, sessionID); +} + +status_t ANetworkSession::createUDPSession( + unsigned localPort, + const char *remoteHost, + unsigned remotePort, + const sp<AMessage> ¬ify, + int32_t *sessionID) { + return createClientOrServer( + kModeCreateUDPSession, + NULL /* addr */, + localPort, + remoteHost, + remotePort, + notify, + sessionID); +} + +status_t ANetworkSession::createTCPDatagramSession( + const struct in_addr &addr, unsigned port, + const sp<AMessage> ¬ify, int32_t *sessionID) { + return createClientOrServer( + kModeCreateTCPDatagramSessionPassive, + &addr, + port, + NULL /* remoteHost */, + 0 /* remotePort */, + notify, + sessionID); +} + +status_t ANetworkSession::createTCPDatagramSession( + unsigned localPort, + const char *remoteHost, + unsigned remotePort, + const sp<AMessage> ¬ify, + int32_t *sessionID) { + return createClientOrServer( + kModeCreateTCPDatagramSessionActive, + NULL /* addr */, + localPort, + remoteHost, + remotePort, + notify, + sessionID); +} + +status_t ANetworkSession::destroySession(int32_t sessionID) { + Mutex::Autolock autoLock(mLock); + + ssize_t index = mSessions.indexOfKey(sessionID); + + if (index < 0) { + return -ENOENT; + } + + mSessions.removeItemsAt(index); + + interrupt(); + + return OK; +} + +// static +status_t ANetworkSession::MakeSocketNonBlocking(int s) { + int flags = fcntl(s, F_GETFL, 0); + if (flags < 0) { + flags = 0; + } + + int res = fcntl(s, F_SETFL, flags | O_NONBLOCK); + if (res < 0) { + return -errno; + } + + return OK; +} + +status_t ANetworkSession::createClientOrServer( + Mode mode, + const struct in_addr *localAddr, + unsigned port, + const char *remoteHost, + unsigned remotePort, + const sp<AMessage> ¬ify, + int32_t *sessionID) { + Mutex::Autolock autoLock(mLock); + + *sessionID = 0; + status_t err = OK; + int s, res; + sp<Session> session; + + s = socket( + AF_INET, + (mode == kModeCreateUDPSession) ? SOCK_DGRAM : SOCK_STREAM, + 0); + + if (s < 0) { + err = -errno; + goto bail; + } + + if (mode == kModeCreateRTSPServer + || mode == kModeCreateTCPDatagramSessionPassive) { + const int yes = 1; + res = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)); + + if (res < 0) { + err = -errno; + goto bail2; + } + } + + if (mode == kModeCreateUDPSession) { + int size = 256 * 1024; + + res = setsockopt(s, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)); + + if (res < 0) { + err = -errno; + goto bail2; + } + + res = setsockopt(s, SOL_SOCKET, SO_SNDBUF, &size, sizeof(size)); + + if (res < 0) { + err = -errno; + goto bail2; + } + } else if (mode == kModeCreateTCPDatagramSessionActive) { + int flag = 1; + res = setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &flag, sizeof(flag)); + + if (res < 0) { + err = -errno; + goto bail2; + } + + int tos = 224; // VOICE + res = setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)); + + if (res < 0) { + err = -errno; + goto bail2; + } + } + + err = MakeSocketNonBlocking(s); + + if (err != OK) { + goto bail2; + } + + struct sockaddr_in addr; + memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); + addr.sin_family = AF_INET; + + if (mode == kModeCreateRTSPClient + || mode == kModeCreateTCPDatagramSessionActive) { + struct hostent *ent= gethostbyname(remoteHost); + if (ent == NULL) { + err = -h_errno; + goto bail2; + } + + addr.sin_addr.s_addr = *(in_addr_t *)ent->h_addr; + addr.sin_port = htons(remotePort); + } else if (localAddr != NULL) { + addr.sin_addr = *localAddr; + addr.sin_port = htons(port); + } else { + addr.sin_addr.s_addr = htonl(INADDR_ANY); + addr.sin_port = htons(port); + } + + if (mode == kModeCreateRTSPClient + || mode == kModeCreateTCPDatagramSessionActive) { + in_addr_t x = ntohl(addr.sin_addr.s_addr); + ALOGI("connecting socket %d to %d.%d.%d.%d:%d", + s, + (x >> 24), + (x >> 16) & 0xff, + (x >> 8) & 0xff, + x & 0xff, + ntohs(addr.sin_port)); + + res = connect(s, (const struct sockaddr *)&addr, sizeof(addr)); + + CHECK_LT(res, 0); + if (errno == EINPROGRESS) { + res = 0; + } + } else { + res = bind(s, (const struct sockaddr *)&addr, sizeof(addr)); + + if (res == 0) { + if (mode == kModeCreateRTSPServer + || mode == kModeCreateTCPDatagramSessionPassive) { + res = listen(s, 4); + } else { + CHECK_EQ(mode, kModeCreateUDPSession); + + if (remoteHost != NULL) { + struct sockaddr_in remoteAddr; + memset(remoteAddr.sin_zero, 0, sizeof(remoteAddr.sin_zero)); + remoteAddr.sin_family = AF_INET; + remoteAddr.sin_port = htons(remotePort); + + struct hostent *ent= gethostbyname(remoteHost); + if (ent == NULL) { + err = -h_errno; + goto bail2; + } + + remoteAddr.sin_addr.s_addr = *(in_addr_t *)ent->h_addr; + + res = connect( + s, + (const struct sockaddr *)&remoteAddr, + sizeof(remoteAddr)); + } + } + } + } + + if (res < 0) { + err = -errno; + goto bail2; + } + + Session::State state; + switch (mode) { + case kModeCreateRTSPClient: + state = Session::CONNECTING; + break; + + case kModeCreateTCPDatagramSessionActive: + state = Session::CONNECTING; + break; + + case kModeCreateTCPDatagramSessionPassive: + state = Session::LISTENING_TCP_DGRAMS; + break; + + case kModeCreateRTSPServer: + state = Session::LISTENING_RTSP; + break; + + default: + CHECK_EQ(mode, kModeCreateUDPSession); + state = Session::DATAGRAM; + break; + } + + session = new Session( + mNextSessionID++, + state, + s, + notify); + + if (mode == kModeCreateTCPDatagramSessionActive) { + session->setMode(Session::MODE_DATAGRAM); + } else if (mode == kModeCreateRTSPClient) { + session->setMode(Session::MODE_RTSP); + } + + mSessions.add(session->sessionID(), session); + + interrupt(); + + *sessionID = session->sessionID(); + + goto bail; + +bail2: + close(s); + s = -1; + +bail: + return err; +} + +status_t ANetworkSession::connectUDPSession( + int32_t sessionID, const char *remoteHost, unsigned remotePort) { + Mutex::Autolock autoLock(mLock); + + ssize_t index = mSessions.indexOfKey(sessionID); + + if (index < 0) { + return -ENOENT; + } + + const sp<Session> session = mSessions.valueAt(index); + int s = session->socket(); + + struct sockaddr_in remoteAddr; + memset(remoteAddr.sin_zero, 0, sizeof(remoteAddr.sin_zero)); + remoteAddr.sin_family = AF_INET; + remoteAddr.sin_port = htons(remotePort); + + status_t err = OK; + struct hostent *ent = gethostbyname(remoteHost); + if (ent == NULL) { + err = -h_errno; + } else { + remoteAddr.sin_addr.s_addr = *(in_addr_t *)ent->h_addr; + + int res = connect( + s, + (const struct sockaddr *)&remoteAddr, + sizeof(remoteAddr)); + + if (res < 0) { + err = -errno; + } + } + + return err; +} + +status_t ANetworkSession::sendRequest( + int32_t sessionID, const void *data, ssize_t size, + bool timeValid, int64_t timeUs) { + Mutex::Autolock autoLock(mLock); + + ssize_t index = mSessions.indexOfKey(sessionID); + + if (index < 0) { + return -ENOENT; + } + + const sp<Session> session = mSessions.valueAt(index); + + status_t err = session->sendRequest(data, size, timeValid, timeUs); + + interrupt(); + + return err; +} + +status_t ANetworkSession::switchToWebSocketMode(int32_t sessionID) { + Mutex::Autolock autoLock(mLock); + + ssize_t index = mSessions.indexOfKey(sessionID); + + if (index < 0) { + return -ENOENT; + } + + const sp<Session> session = mSessions.valueAt(index); + return session->switchToWebSocketMode(); +} + +void ANetworkSession::interrupt() { + static const char dummy = 0; + + ssize_t n; + do { + n = write(mPipeFd[1], &dummy, 1); + } while (n < 0 && errno == EINTR); + + if (n < 0) { + ALOGW("Error writing to pipe (%s)", strerror(errno)); + } +} + +void ANetworkSession::threadLoop() { + fd_set rs, ws; + FD_ZERO(&rs); + FD_ZERO(&ws); + + FD_SET(mPipeFd[0], &rs); + int maxFd = mPipeFd[0]; + + { + Mutex::Autolock autoLock(mLock); + + for (size_t i = 0; i < mSessions.size(); ++i) { + const sp<Session> &session = mSessions.valueAt(i); + + int s = session->socket(); + + if (s < 0) { + continue; + } + + if (session->wantsToRead()) { + FD_SET(s, &rs); + if (s > maxFd) { + maxFd = s; + } + } + + if (session->wantsToWrite()) { + FD_SET(s, &ws); + if (s > maxFd) { + maxFd = s; + } + } + } + } + + int res = select(maxFd + 1, &rs, &ws, NULL, NULL /* tv */); + + if (res == 0) { + return; + } + + if (res < 0) { + if (errno == EINTR) { + return; + } + + ALOGE("select failed w/ error %d (%s)", errno, strerror(errno)); + return; + } + + if (FD_ISSET(mPipeFd[0], &rs)) { + char c; + ssize_t n; + do { + n = read(mPipeFd[0], &c, 1); + } while (n < 0 && errno == EINTR); + + if (n < 0) { + ALOGW("Error reading from pipe (%s)", strerror(errno)); + } + + --res; + } + + { + Mutex::Autolock autoLock(mLock); + + List<sp<Session> > sessionsToAdd; + + for (size_t i = mSessions.size(); res > 0 && i-- > 0;) { + const sp<Session> &session = mSessions.valueAt(i); + + int s = session->socket(); + + if (s < 0) { + continue; + } + + if (FD_ISSET(s, &rs) || FD_ISSET(s, &ws)) { + --res; + } + + if (FD_ISSET(s, &rs)) { + if (session->isRTSPServer() || session->isTCPDatagramServer()) { + struct sockaddr_in remoteAddr; + socklen_t remoteAddrLen = sizeof(remoteAddr); + + int clientSocket = accept( + s, (struct sockaddr *)&remoteAddr, &remoteAddrLen); + + if (clientSocket >= 0) { + status_t err = MakeSocketNonBlocking(clientSocket); + + if (err != OK) { + ALOGE("Unable to make client socket non blocking, " + "failed w/ error %d (%s)", + err, strerror(-err)); + + close(clientSocket); + clientSocket = -1; + } else { + in_addr_t addr = ntohl(remoteAddr.sin_addr.s_addr); + + ALOGI("incoming connection from %d.%d.%d.%d:%d " + "(socket %d)", + (addr >> 24), + (addr >> 16) & 0xff, + (addr >> 8) & 0xff, + addr & 0xff, + ntohs(remoteAddr.sin_port), + clientSocket); + + sp<Session> clientSession = + new Session( + mNextSessionID++, + Session::CONNECTED, + clientSocket, + session->getNotificationMessage()); + + clientSession->setMode( + session->isRTSPServer() + ? Session::MODE_RTSP + : Session::MODE_DATAGRAM); + + sessionsToAdd.push_back(clientSession); + } + } else { + ALOGE("accept returned error %d (%s)", + errno, strerror(errno)); + } + } else { + status_t err = session->readMore(); + if (err != OK) { + ALOGE("readMore on socket %d failed w/ error %d (%s)", + s, err, strerror(-err)); + } + } + } + + if (FD_ISSET(s, &ws)) { + status_t err = session->writeMore(); + if (err != OK) { + ALOGE("writeMore on socket %d failed w/ error %d (%s)", + s, err, strerror(-err)); + } + } + } + + while (!sessionsToAdd.empty()) { + sp<Session> session = *sessionsToAdd.begin(); + sessionsToAdd.erase(sessionsToAdd.begin()); + + mSessions.add(session->sessionID(), session); + + ALOGI("added clientSession %d", session->sessionID()); + } + } +} + +} // namespace android + |