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 // Original author: ekr@rtfm.com
8 
9 // Some of this code is cut-and-pasted from nICEr. Copyright is:
10 
11 /*
12 Copyright (c) 2007, Adobe Systems, Incorporated
13 All rights reserved.
14 
15 Redistribution and use in source and binary forms, with or without
16 modification, are permitted provided that the following conditions are
17 met:
18 
19 * Redistributions of source code must retain the above copyright
20   notice, this list of conditions and the following disclaimer.
21 
22 * Redistributions in binary form must reproduce the above copyright
23   notice, this list of conditions and the following disclaimer in the
24   documentation and/or other materials provided with the distribution.
25 
26 * Neither the name of Adobe Systems, Network Resonance nor the names of its
27   contributors may be used to endorse or promote products derived from
28   this software without specific prior written permission.
29 
30 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
33 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
36 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
40 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 */
42 
43 #ifndef nriceresolverfake_h__
44 #define nriceresolverfake_h__
45 
46 #include <map>
47 #include <string>
48 
49 #include "nspr.h"
50 #include "prnetdb.h"
51 
52 typedef struct nr_resolver_ nr_resolver;
53 typedef struct nr_resolver_vtbl_ nr_resolver_vtbl;
54 typedef struct nr_transport_addr_ nr_transport_addr;
55 typedef struct nr_resolver_resource_ nr_resolver_resource;
56 
57 namespace mozilla {
58 
59 class NrIceResolverFake {
60  public:
61   NrIceResolverFake();
62   ~NrIceResolverFake();
63 
SetAddr(const std::string & hostname,const PRNetAddr & addr)64   void SetAddr(const std::string& hostname, const PRNetAddr& addr) {
65     switch (addr.raw.family) {
66       case AF_INET:
67         addrs_[hostname] = addr;
68         break;
69       case AF_INET6:
70         addrs6_[hostname] = addr;
71         break;
72       default:
73         MOZ_CRASH();
74     }
75   }
76 
77   nr_resolver* AllocateResolver();
78 
79   void DestroyResolver();
80 
81  private:
82   // Implementations of vtbl functions
83   static int destroy(void** objp);
84   static int resolve(void* obj, nr_resolver_resource* resource,
85                      int (*cb)(void* cb_arg, nr_transport_addr* addr),
86                      void* cb_arg, void** handle);
87   static void resolve_cb(NR_SOCKET s, int how, void* cb_arg);
88   static int cancel(void* obj, void* handle);
89 
90   // Get an address.
Resolve(const std::string & hostname,int address_family)91   const PRNetAddr* Resolve(const std::string& hostname, int address_family) {
92     switch (address_family) {
93       case AF_INET:
94         if (!addrs_.count(hostname)) return nullptr;
95 
96         return &addrs_[hostname];
97       case AF_INET6:
98         if (!addrs6_.count(hostname)) return nullptr;
99 
100         return &addrs6_[hostname];
101       default:
102         MOZ_CRASH();
103     }
104   }
105 
106   struct PendingResolution {
PendingResolutionPendingResolution107     PendingResolution(NrIceResolverFake* resolver, const std::string& hostname,
108                       uint16_t port, int transport, int address_family,
109                       int (*cb)(void* cb_arg, nr_transport_addr* addr),
110                       void* cb_arg)
111         : resolver_(resolver),
112           hostname_(hostname),
113           port_(port),
114           transport_(transport),
115           address_family_(address_family),
116           cb_(cb),
117           cb_arg_(cb_arg) {}
118 
119     NrIceResolverFake* resolver_;
120     std::string hostname_;
121     uint16_t port_;
122     int transport_;
123     int address_family_;
124     int (*cb_)(void* cb_arg, nr_transport_addr* addr);
125     void* cb_arg_;
126     void* timer_handle_;
127   };
128 
129   nr_resolver_vtbl* vtbl_;
130   std::map<std::string, PRNetAddr> addrs_;
131   std::map<std::string, PRNetAddr> addrs6_;
132   uint32_t delay_ms_;
133   int allocated_resolvers_;
134 };
135 
136 }  // End of namespace mozilla
137 
138 #endif
139