media/mtransport/nriceresolverfake.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7
   8 // Original author: ekr@rtfm.com
   9
  10 // Some of this code is cut-and-pasted from nICEr. Copyright is:
  11
  12 /*
  13 Copyright (c) 2007, Adobe Systems, Incorporated
  14 All rights reserved.
  15
  16 Redistribution and use in source and binary forms, with or without
  17 modification, are permitted provided that the following conditions are
  18 met:
  19
  20 * Redistributions of source code must retain the above copyright
  21   notice, this list of conditions and the following disclaimer.
  22
  23 * Redistributions in binary form must reproduce the above copyright
  24   notice, this list of conditions and the following disclaimer in the
  25   documentation and/or other materials provided with the distribution.
  26
  27 * Neither the name of Adobe Systems, Network Resonance nor the names of its
  28   contributors may be used to endorse or promote products derived from
  29   this software without specific prior written permission.
  30
  31 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  34 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  36 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  37 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  38 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  39 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  40 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  41 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  42 */
  43
  44 #include "nspr.h"
  45 #include "prnetdb.h"
  46
  47 #include "mozilla/Assertions.h"
  48
  49 extern "C" {
  50 #include "nr_api.h"
  51 #include "async_timer.h"
  52 #include "nr_resolver.h"
  53 #include "transport_addr.h"
  54 }
  55
  56 #include "nriceresolverfake.h"
  57 #include "nr_socket_prsock.h"
  58
  59 namespace mozilla {
  60
  61 NrIceResolverFake::NrIceResolverFake() :
  62     vtbl_(new nr_resolver_vtbl), addrs_(), delay_ms_(100),
  63     allocated_resolvers_(0) {
  64   vtbl_->destroy = &NrIceResolverFake::destroy;
  65   vtbl_->resolve = &NrIceResolverFake::resolve;
  66   vtbl_->cancel = &NrIceResolverFake::cancel;
  67 }
  68
  69 NrIceResolverFake::~NrIceResolverFake() {
  70   MOZ_ASSERT(allocated_resolvers_ == 0);
  71   delete vtbl_;
  72 }
  73
  74
  75 nr_resolver *NrIceResolverFake::AllocateResolver() {
  76   nr_resolver *resolver;
  77
  78   int r = nr_resolver_create_int((void *)this,
  79                                  vtbl_, &resolver);
  80   MOZ_ASSERT(!r);
  81   if(r)
  82     return nullptr;
  83
  84   ++allocated_resolvers_;
  85
  86   return resolver;
  87 }
  88
  89 void NrIceResolverFake::DestroyResolver() {
  90   --allocated_resolvers_;
  91 }
  92
  93 int NrIceResolverFake::destroy(void **objp) {
  94   if (!objp || !*objp)
  95     return 0;
  96
  97   NrIceResolverFake *fake = static_cast<NrIceResolverFake *>(*objp);
  98   *objp = 0;
  99
 100   fake->DestroyResolver();
 101
 102   return 0;
 103 }
 104
 105 int NrIceResolverFake::resolve(void *obj,
 106                                nr_resolver_resource *resource,
 107                                int (*cb)(void *cb_arg,
 108                                          nr_transport_addr *addr),
 109                                void *cb_arg,
 110                                void **handle) {
 111   int r,_status;
 112
 113   MOZ_ASSERT(obj);
 114   NrIceResolverFake *fake = static_cast<NrIceResolverFake *>(obj);
 115
 116   MOZ_ASSERT(fake->allocated_resolvers_ > 0);
 117
 118   PendingResolution *pending =
 119       new PendingResolution(fake,
 120                             resource->domain_name,
 121                             resource->port ? resource->port : 3478,
 122                             resource->transport_protocol ?
 123                             resource->transport_protocol :
 124                             IPPROTO_UDP,
 125                             cb, cb_arg);
 126
 127   if ((r=NR_ASYNC_TIMER_SET(fake->delay_ms_,NrIceResolverFake::resolve_cb,
 128                             (void *)pending, &pending->timer_handle_))) {
 129     delete pending;
 130     ABORT(r);
 131   }
 132   *handle = pending;
 133
 134   _status=0;
 135 abort:
 136   return(_status);
 137 }
 138
 139 void NrIceResolverFake::resolve_cb(NR_SOCKET s, int how, void *cb_arg) {
 140   MOZ_ASSERT(cb_arg);
 141   PendingResolution *pending = static_cast<PendingResolution *>(cb_arg);
 142
 143   const PRNetAddr *addr=pending->resolver_->Resolve(pending->hostname_);
 144
 145   if (addr) {
 146     nr_transport_addr transport_addr;
 147
 148     int r = nr_praddr_to_transport_addr(addr, &transport_addr,
 149                                         pending->transport_, 0);
 150     MOZ_ASSERT(!r);
 151     if (r)
 152       goto abort;
 153
 154     r=nr_transport_addr_set_port(&transport_addr, pending->port_);
 155     MOZ_ASSERT(!r);
 156     if (r)
 157       goto abort;
 158
 159     /* Fill in the address string */
 160     r=nr_transport_addr_fmt_addr_string(&transport_addr);
 161     MOZ_ASSERT(!r);
 162     if (r)
 163       goto abort;
 164
 165     pending->cb_(pending->cb_arg_, &transport_addr);
 166     delete pending;
 167     return;
 168   }
 169
 170 abort:
 171   // Resolution failed.
 172   pending->cb_(pending->cb_arg_, nullptr);
 173
 174   delete pending;
 175 }
 176
 177 int NrIceResolverFake::cancel(void *obj, void *handle) {
 178   MOZ_ASSERT(obj);
 179   MOZ_ASSERT(static_cast<NrIceResolverFake *>(obj)->allocated_resolvers_ > 0);
 180
 181   PendingResolution *pending = static_cast<PendingResolution *>(handle);
 182
 183   NR_async_timer_cancel(pending->timer_handle_);
 184   delete pending;
 185
 186   return(0);
 187 }
 188
 189
 190 }  // End of namespace mozilla