The Tor Browser / file comparison
comparison: netwerk/dns/DNS.h
netwerk/dns/DNS.h
- changeset 1
- ca08bd8f51b2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:a12c235549e8 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=8 sts=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 | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef DNS_h_ | |
| 8 #define DNS_h_ | |
| 9 | |
| 10 #include "nscore.h" | |
| 11 #include "prio.h" | |
| 12 #include "prnetdb.h" | |
| 13 #include "plstr.h" | |
| 14 #include "mozilla/LinkedList.h" | |
| 15 #include "mozilla/MemoryReporting.h" | |
| 16 | |
| 17 #if !defined(XP_WIN) | |
| 18 #include <arpa/inet.h> | |
| 19 #endif | |
| 20 | |
| 21 #ifdef XP_WIN | |
| 22 #include "winsock2.h" | |
| 23 #endif | |
| 24 | |
| 25 #define IPv6ADDR_IS_LOOPBACK(a) \ | |
| 26 (((a)->u32[0] == 0) && \ | |
| 27 ((a)->u32[1] == 0) && \ | |
| 28 ((a)->u32[2] == 0) && \ | |
| 29 ((a)->u8[12] == 0) && \ | |
| 30 ((a)->u8[13] == 0) && \ | |
| 31 ((a)->u8[14] == 0) && \ | |
| 32 ((a)->u8[15] == 0x1U)) | |
| 33 | |
| 34 #define IPv6ADDR_IS_V4MAPPED(a) \ | |
| 35 (((a)->u32[0] == 0) && \ | |
| 36 ((a)->u32[1] == 0) && \ | |
| 37 ((a)->u8[8] == 0) && \ | |
| 38 ((a)->u8[9] == 0) && \ | |
| 39 ((a)->u8[10] == 0xff) && \ | |
| 40 ((a)->u8[11] == 0xff)) | |
| 41 | |
| 42 #define IPv6ADDR_V4MAPPED_TO_IPADDR(a) ((a)->u32[3]) | |
| 43 | |
| 44 #define IPv6ADDR_IS_UNSPECIFIED(a) \ | |
| 45 (((a)->u32[0] == 0) && \ | |
| 46 ((a)->u32[1] == 0) && \ | |
| 47 ((a)->u32[2] == 0) && \ | |
| 48 ((a)->u32[3] == 0)) | |
| 49 | |
| 50 namespace mozilla { | |
| 51 namespace net { | |
| 52 | |
| 53 // Required buffer size for text form of an IP address. | |
| 54 // Includes space for null termination. We make our own contants | |
| 55 // because we don't want higher-level code depending on things | |
| 56 // like INET6_ADDRSTRLEN and having to include the associated | |
| 57 // platform-specific headers. | |
| 58 #ifdef XP_WIN | |
| 59 // Windows requires longer buffers for some reason. | |
| 60 const int kIPv4CStrBufSize = 22; | |
| 61 const int kIPv6CStrBufSize = 65; | |
| 62 const int kNetAddrMaxCStrBufSize = kIPv6CStrBufSize; | |
| 63 #else | |
| 64 const int kIPv4CStrBufSize = 16; | |
| 65 const int kIPv6CStrBufSize = 46; | |
| 66 const int kLocalCStrBufSize = 108; | |
| 67 const int kNetAddrMaxCStrBufSize = kLocalCStrBufSize; | |
| 68 #endif | |
| 69 | |
| 70 // This was all created at a time in which we were using NSPR for host | |
| 71 // resolution and we were propagating NSPR types like "PRAddrInfo" and | |
| 72 // "PRNetAddr" all over Gecko. This made it hard to use another host | |
| 73 // resolver -- we were locked into NSPR. The goal here is to get away | |
| 74 // from that. We'll translate what we get from NSPR or any other host | |
| 75 // resolution library into the types below and use them in Gecko. | |
| 76 | |
| 77 union IPv6Addr { | |
| 78 uint8_t u8[16]; | |
| 79 uint16_t u16[8]; | |
| 80 uint32_t u32[4]; | |
| 81 uint64_t u64[2]; | |
| 82 }; | |
| 83 | |
| 84 // This struct is similar to operating system structs like "sockaddr", used for | |
| 85 // things like "connect" and "getsockname". When tempted to cast or do dumb | |
| 86 // copies of this struct to another struct, bear compiler-computed padding | |
| 87 // in mind. The size of this struct, and the layout of the data in it, may | |
| 88 // not be what you expect. | |
| 89 union NetAddr { | |
| 90 struct { | |
| 91 uint16_t family; /* address family (0x00ff maskable) */ | |
| 92 char data[14]; /* raw address data */ | |
| 93 } raw; | |
| 94 struct { | |
| 95 uint16_t family; /* address family (AF_INET) */ | |
| 96 uint16_t port; /* port number */ | |
| 97 uint32_t ip; /* The actual 32 bits of address */ | |
| 98 } inet; | |
| 99 struct { | |
| 100 uint16_t family; /* address family (AF_INET6) */ | |
| 101 uint16_t port; /* port number */ | |
| 102 uint32_t flowinfo; /* routing information */ | |
| 103 IPv6Addr ip; /* the actual 128 bits of address */ | |
| 104 uint32_t scope_id; /* set of interfaces for a scope */ | |
| 105 } inet6; | |
| 106 #if defined(XP_UNIX) | |
| 107 struct { /* Unix domain socket address */ | |
| 108 uint16_t family; /* address family (AF_UNIX) */ | |
| 109 char path[104]; /* null-terminated pathname */ | |
| 110 } local; | |
| 111 #endif | |
| 112 // introduced to support nsTArray<NetAddr> (for DNSRequestParent.cpp) | |
| 113 bool operator == (const NetAddr& other) const; | |
| 114 }; | |
| 115 | |
| 116 // This class wraps a NetAddr union to provide C++ linked list | |
| 117 // capabilities and other methods. It is created from a PRNetAddr, | |
| 118 // which is converted to a mozilla::dns::NetAddr. | |
| 119 class NetAddrElement : public LinkedListElement<NetAddrElement> { | |
| 120 public: | |
| 121 NetAddrElement(const PRNetAddr *prNetAddr); | |
| 122 NetAddrElement(const NetAddrElement& netAddr); | |
| 123 ~NetAddrElement(); | |
| 124 | |
| 125 NetAddr mAddress; | |
| 126 }; | |
| 127 | |
| 128 class AddrInfo { | |
| 129 public: | |
| 130 // Creates an AddrInfo object. It calls the AddrInfo(const char*, const char*) | |
| 131 // to initialize the host and the cname. | |
| 132 AddrInfo(const char *host, const PRAddrInfo *prAddrInfo, bool disableIPv4, | |
| 133 const char *cname); | |
| 134 | |
| 135 // Creates a basic AddrInfo object (initialize only the host and the cname). | |
| 136 AddrInfo(const char *host, const char *cname); | |
| 137 ~AddrInfo(); | |
| 138 | |
| 139 void AddAddress(NetAddrElement *address); | |
| 140 | |
| 141 size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const; | |
| 142 | |
| 143 char *mHostName; | |
| 144 char *mCanonicalName; | |
| 145 LinkedList<NetAddrElement> mAddresses; | |
| 146 | |
| 147 private: | |
| 148 void Init(const char *host, const char *cname); | |
| 149 }; | |
| 150 | |
| 151 // Copies the contents of a PRNetAddr to a NetAddr. | |
| 152 // Does not do a ptr safety check! | |
| 153 void PRNetAddrToNetAddr(const PRNetAddr *prAddr, NetAddr *addr); | |
| 154 | |
| 155 // Copies the contents of a NetAddr to a PRNetAddr. | |
| 156 // Does not do a ptr safety check! | |
| 157 void NetAddrToPRNetAddr(const NetAddr *addr, PRNetAddr *prAddr); | |
| 158 | |
| 159 bool NetAddrToString(const NetAddr *addr, char *buf, uint32_t bufSize); | |
| 160 | |
| 161 bool IsLoopBackAddress(const NetAddr *addr); | |
| 162 | |
| 163 bool IsIPAddrAny(const NetAddr *addr); | |
| 164 | |
| 165 bool IsIPAddrV4Mapped(const NetAddr *addr); | |
| 166 | |
| 167 bool IsIPAddrLocal(const NetAddr *addr); | |
| 168 | |
| 169 nsresult GetPort(const NetAddr *aAddr, uint16_t *aResult); | |
| 170 | |
| 171 } // namespace net | |
| 172 } // namespace mozilla | |
| 173 | |
| 174 #endif // DNS_h_ |
