Move talk/app/webrtc to webrtc/api

talk/app/webrtc/sctputils.cc

-/*
- * libjingle
- * Copyright 2013 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.
- */
-
-#include "talk/app/webrtc/sctputils.h"
-
-#include "webrtc/base/buffer.h"
-#include "webrtc/base/bytebuffer.h"
-#include "webrtc/base/logging.h"
-
-namespace webrtc {
-
-// Format defined at
-// http://tools.ietf.org/html/draft-ietf-rtcweb-data-protocol-01#section
-
-static const uint8_t DATA_CHANNEL_OPEN_MESSAGE_TYPE = 0x03;
-static const uint8_t DATA_CHANNEL_OPEN_ACK_MESSAGE_TYPE = 0x02;
-
-enum DataChannelOpenMessageChannelType {
-  DCOMCT_ORDERED_RELIABLE = 0x00,
-  DCOMCT_ORDERED_PARTIAL_RTXS = 0x01,
-  DCOMCT_ORDERED_PARTIAL_TIME = 0x02,
-  DCOMCT_UNORDERED_RELIABLE = 0x80,
-  DCOMCT_UNORDERED_PARTIAL_RTXS = 0x81,
-  DCOMCT_UNORDERED_PARTIAL_TIME = 0x82,
-};
-
-bool IsOpenMessage(const rtc::Buffer& payload) {
-  // Format defined at
-  // http://tools.ietf.org/html/draft-jesup-rtcweb-data-protocol-04
-
-  rtc::ByteBuffer buffer(payload);
-  uint8_t message_type;
-  if (!buffer.ReadUInt8(&message_type)) {
-    LOG(LS_WARNING) << "Could not read OPEN message type.";
-    return false;
-  }
-  return message_type == DATA_CHANNEL_OPEN_MESSAGE_TYPE;
-}
-
-bool ParseDataChannelOpenMessage(const rtc::Buffer& payload,
-                                 std::string* label,
-                                 DataChannelInit* config) {
-  // Format defined at
-  // http://tools.ietf.org/html/draft-jesup-rtcweb-data-protocol-04
-
-  rtc::ByteBuffer buffer(payload);
-  uint8_t message_type;
-  if (!buffer.ReadUInt8(&message_type)) {
-    LOG(LS_WARNING) << "Could not read OPEN message type.";
-    return false;
-  }
-  if (message_type != DATA_CHANNEL_OPEN_MESSAGE_TYPE) {
-    LOG(LS_WARNING) << "Data Channel OPEN message of unexpected type: "
-                    << message_type;
-    return false;
-  }
-
-  uint8_t channel_type;
-  if (!buffer.ReadUInt8(&channel_type)) {
-    LOG(LS_WARNING) << "Could not read OPEN message channel type.";
-    return false;
-  }
-
-  uint16_t priority;
-  if (!buffer.ReadUInt16(&priority)) {
-    LOG(LS_WARNING) << "Could not read OPEN message reliabilility prioirty.";
-    return false;
-  }
-  uint32_t reliability_param;
-  if (!buffer.ReadUInt32(&reliability_param)) {
-    LOG(LS_WARNING) << "Could not read OPEN message reliabilility param.";
-    return false;
-  }
-  uint16_t label_length;
-  if (!buffer.ReadUInt16(&label_length)) {
-    LOG(LS_WARNING) << "Could not read OPEN message label length.";
-    return false;
-  }
-  uint16_t protocol_length;
-  if (!buffer.ReadUInt16(&protocol_length)) {
-    LOG(LS_WARNING) << "Could not read OPEN message protocol length.";
-    return false;
-  }
-  if (!buffer.ReadString(label, (size_t) label_length)) {
-    LOG(LS_WARNING) << "Could not read OPEN message label";
-    return false;
-  }
-  if (!buffer.ReadString(&config->protocol, protocol_length)) {
-    LOG(LS_WARNING) << "Could not read OPEN message protocol.";
-    return false;
-  }
-
-  config->ordered = true;
-  switch (channel_type) {
-    case DCOMCT_UNORDERED_RELIABLE:
-    case DCOMCT_UNORDERED_PARTIAL_RTXS:
-    case DCOMCT_UNORDERED_PARTIAL_TIME:
-      config->ordered = false;
-  }
-
-  config->maxRetransmits = -1;
-  config->maxRetransmitTime = -1;
-  switch (channel_type) {
-    case DCOMCT_ORDERED_PARTIAL_RTXS:
-    case DCOMCT_UNORDERED_PARTIAL_RTXS:
-      config->maxRetransmits = reliability_param;
-      break;
-    case DCOMCT_ORDERED_PARTIAL_TIME:
-    case DCOMCT_UNORDERED_PARTIAL_TIME:
-      config->maxRetransmitTime = reliability_param;
-      break;
-  }
-  return true;
-}
-
-bool ParseDataChannelOpenAckMessage(const rtc::Buffer& payload) {
-  rtc::ByteBuffer buffer(payload);
-  uint8_t message_type;
-  if (!buffer.ReadUInt8(&message_type)) {
-    LOG(LS_WARNING) << "Could not read OPEN_ACK message type.";
-    return false;
-  }
-  if (message_type != DATA_CHANNEL_OPEN_ACK_MESSAGE_TYPE) {
-    LOG(LS_WARNING) << "Data Channel OPEN_ACK message of unexpected type: "
-                    << message_type;
-    return false;
-  }
-  return true;
-}
-
-bool WriteDataChannelOpenMessage(const std::string& label,
-                                 const DataChannelInit& config,
-                                 rtc::Buffer* payload) {
-  // Format defined at
-  // http://tools.ietf.org/html/draft-ietf-rtcweb-data-protocol-00#section-6.1
-  uint8_t channel_type = 0;
-  uint32_t reliability_param = 0;
-  uint16_t priority = 0;
-  if (config.ordered) {
-    if (config.maxRetransmits > -1) {
-      channel_type = DCOMCT_ORDERED_PARTIAL_RTXS;
-      reliability_param = config.maxRetransmits;
-    } else if (config.maxRetransmitTime > -1) {
-      channel_type = DCOMCT_ORDERED_PARTIAL_TIME;
-      reliability_param = config.maxRetransmitTime;
-    } else {
-      channel_type = DCOMCT_ORDERED_RELIABLE;
-    }
-  } else {
-    if (config.maxRetransmits > -1) {
-      channel_type = DCOMCT_UNORDERED_PARTIAL_RTXS;
-      reliability_param = config.maxRetransmits;
-    } else if (config.maxRetransmitTime > -1) {
-      channel_type = DCOMCT_UNORDERED_PARTIAL_TIME;
-      reliability_param = config.maxRetransmitTime;
-    } else {
-      channel_type = DCOMCT_UNORDERED_RELIABLE;
-    }
-  }
-
-  rtc::ByteBuffer buffer(
-      NULL, 20 + label.length() + config.protocol.length(),
-      rtc::ByteBuffer::ORDER_NETWORK);
-  buffer.WriteUInt8(DATA_CHANNEL_OPEN_MESSAGE_TYPE);
-  buffer.WriteUInt8(channel_type);
-  buffer.WriteUInt16(priority);
-  buffer.WriteUInt32(reliability_param);
-  buffer.WriteUInt16(static_cast<uint16_t>(label.length()));
-  buffer.WriteUInt16(static_cast<uint16_t>(config.protocol.length()));
-  buffer.WriteString(label);
-  buffer.WriteString(config.protocol);
-  payload->SetData(buffer.Data(), buffer.Length());
-  return true;
-}
-
-void WriteDataChannelOpenAckMessage(rtc::Buffer* payload) {
-  rtc::ByteBuffer buffer(rtc::ByteBuffer::ORDER_NETWORK);
-  buffer.WriteUInt8(DATA_CHANNEL_OPEN_ACK_MESSAGE_TYPE);
-  payload->SetData(buffer.Data(), buffer.Length());
-}
-}  // namespace webrtc