/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

// Original authors: ekr@rtfm.com; ryan@tokbox.com

#ifndef MTRANSPORT_DUMMY_SOCKET_H_

#define MTRANSPORT_DUMMY_SOCKET_H_

#include "nr_socket_prsock.h"

extern "C" {

#include "transport_addr.h"

}

#include "mediapacket.h"

#include "mozilla/UniquePtr.h"

#define GTEST_HAS_RTTI 0

#include "gtest/gtest.h"

#include "gtest_utils.h"

namespace mozilla {

static UniquePtr<MediaPacket> merge(UniquePtr<MediaPacket> a, UniquePtr<MediaPacket> b) {

  if (a && a->len() && b && b->len()) {

    UniquePtr<uint8_t[]> data(new uint8_t[a->len() + b->len()]);

    memcpy(data.get(), a->data(), a->len());

    memcpy(data.get() + a->len(), b->data(), b->len());

    UniquePtr<MediaPacket> merged(new MediaPacket);

    merged->Take(std::move(data), a->len() + b->len());

    return merged;

  }

  if (a && a->len()) {

    return a;

  }

  if (b && b->len()) {

    return b;

  }

  return nullptr;

}

Unexecuted instantiation: buffered_stun_socket_unittest.cpp:mozilla::merge(mozilla::UniquePtr<mozilla::MediaPacket, mozilla::DefaultDelete<mozilla::MediaPacket> >, mozilla::UniquePtr<mozilla::MediaPacket, mozilla::DefaultDelete<mozilla::MediaPacket> >)

Unexecuted instantiation: proxy_tunnel_socket_unittest.cpp:mozilla::merge(mozilla::UniquePtr<mozilla::MediaPacket, mozilla::DefaultDelete<mozilla::MediaPacket> >, mozilla::UniquePtr<mozilla::MediaPacket, mozilla::DefaultDelete<mozilla::MediaPacket> >)

class DummySocket : public NrSocketBase {

 public:

  DummySocket()

      : writable_(UINT_MAX),

        write_buffer_(nullptr),

        readable_(UINT_MAX),

        read_buffer_(nullptr),

        cb_(nullptr),

        cb_arg_(nullptr),

        self_(nullptr) {}

  // the nr_socket APIs

  virtual int create(nr_transport_addr *addr) override {

    return 0;

  }

  virtual int sendto(const void *msg, size_t len,

                     int flags, nr_transport_addr *to) override {

    MOZ_CRASH();

    return 0;

  }

  virtual int recvfrom(void * buf, size_t maxlen,

                       size_t *len, int flags,

                       nr_transport_addr *from) override {

    MOZ_CRASH();

    return 0;

  }

  virtual int getaddr(nr_transport_addr *addrp) override {

    MOZ_CRASH();

    return 0;

  }

  virtual void close() override {

  }

  virtual int connect(nr_transport_addr *addr) override {

    nr_transport_addr_copy(&connect_addr_, addr);

    return 0;

  }

  virtual int listen(int backlog) override {

    return 0;

  }

  virtual int accept(nr_transport_addr *addrp, nr_socket **sockp) override {

    return 0;

  }

  virtual int write(const void *msg, size_t len, size_t *written) override {

    size_t to_write = std::min(len, writable_);

    if (to_write) {

      UniquePtr<MediaPacket> msgbuf(new MediaPacket);

      msgbuf->Copy(static_cast<const uint8_t *>(msg), to_write);

      write_buffer_ = merge(std::move(write_buffer_), std::move(msgbuf));

    }

    *written = to_write;

    return 0;

  }

  virtual int read(void* buf, size_t maxlen, size_t *len) override {

    if (!read_buffer_.get()) {

      return R_WOULDBLOCK;

    }

    size_t to_read = std::min(read_buffer_->len(),

                              std::min(maxlen, readable_));

    memcpy(buf, read_buffer_->data(), to_read);

    *len = to_read;

    if (to_read < read_buffer_->len()) {

      MediaPacket* newPacket = new MediaPacket;

      newPacket->Copy(read_buffer_->data() + to_read,

                      read_buffer_->len() - to_read);

      read_buffer_.reset(newPacket);

    } else {

      read_buffer_.reset();

    }

    return 0;

  }

  // Implementations of the async_event APIs.

  // These are no-ops because we handle scheduling manually

  // for test purposes.

  virtual int async_wait(int how, NR_async_cb cb, void *cb_arg,

                         char *function, int line) override {

    EXPECT_EQ(nullptr, cb_);

    cb_ = cb;

    cb_arg_ = cb_arg;

    return 0;

  }

  virtual int cancel(int how) override {

    cb_ = nullptr;

    cb_arg_ = nullptr;

    return 0;

  }

  // Read/Manipulate the current state.

  void CheckWriteBuffer(const uint8_t *data, size_t len) {

    if (!len) {

      EXPECT_EQ(nullptr, write_buffer_.get());

    } else {

      EXPECT_NE(nullptr, write_buffer_.get());

      ASSERT_EQ(len, write_buffer_->len());

      ASSERT_EQ(0, memcmp(data, write_buffer_->data(), len));

    }

  }

  void ClearWriteBuffer() {

    write_buffer_.reset();

  }

  void SetWritable(size_t val) {

    writable_ = val;

  }

  void FireWritableCb() {

    NR_async_cb cb = cb_;

    void *cb_arg = cb_arg_;

    cb_ = nullptr;

    cb_arg_ = nullptr;

    cb(this, NR_ASYNC_WAIT_WRITE, cb_arg);

  }

  void SetReadBuffer(const uint8_t *data, size_t len) {

    EXPECT_EQ(nullptr, write_buffer_.get());

    read_buffer_.reset(new MediaPacket);

    read_buffer_->Copy(data, len);

  }

  void ClearReadBuffer() {

    read_buffer_.reset();

  }

  void SetReadable(size_t val) {

    readable_ = val;

  }

  nr_socket *get_nr_socket() {

    if (!self_) {

      int r = nr_socket_create_int(this, vtbl(), &self_);

      AddRef();

      if (r)

        return nullptr;

    }

    return self_;

  }

  nr_transport_addr *get_connect_addr() {

    return &connect_addr_;

  }

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DummySocket, override);

 private:

  ~DummySocket() {}

  DISALLOW_COPY_ASSIGN(DummySocket);

  size_t writable_;  // Amount we allow someone to write.

  UniquePtr<MediaPacket> write_buffer_;

  size_t readable_;   // Amount we allow someone to read.

  UniquePtr<MediaPacket> read_buffer_;

  NR_async_cb cb_;

  void *cb_arg_;

  nr_socket *self_;

  nr_transport_addr connect_addr_;

};

} //namespace mozilla

#endif