1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/dns/DNS.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,174 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef DNS_h_
1.11 +#define DNS_h_
1.12 +
1.13 +#include "nscore.h"
1.14 +#include "prio.h"
1.15 +#include "prnetdb.h"
1.16 +#include "plstr.h"
1.17 +#include "mozilla/LinkedList.h"
1.18 +#include "mozilla/MemoryReporting.h"
1.19 +
1.20 +#if !defined(XP_WIN)
1.21 +#include <arpa/inet.h>
1.22 +#endif
1.23 +
1.24 +#ifdef XP_WIN
1.25 +#include "winsock2.h"
1.26 +#endif
1.27 +
1.28 +#define IPv6ADDR_IS_LOOPBACK(a) \
1.29 + (((a)->u32[0] == 0) && \
1.30 + ((a)->u32[1] == 0) && \
1.31 + ((a)->u32[2] == 0) && \
1.32 + ((a)->u8[12] == 0) && \
1.33 + ((a)->u8[13] == 0) && \
1.34 + ((a)->u8[14] == 0) && \
1.35 + ((a)->u8[15] == 0x1U))
1.36 +
1.37 +#define IPv6ADDR_IS_V4MAPPED(a) \
1.38 + (((a)->u32[0] == 0) && \
1.39 + ((a)->u32[1] == 0) && \
1.40 + ((a)->u8[8] == 0) && \
1.41 + ((a)->u8[9] == 0) && \
1.42 + ((a)->u8[10] == 0xff) && \
1.43 + ((a)->u8[11] == 0xff))
1.44 +
1.45 +#define IPv6ADDR_V4MAPPED_TO_IPADDR(a) ((a)->u32[3])
1.46 +
1.47 +#define IPv6ADDR_IS_UNSPECIFIED(a) \
1.48 + (((a)->u32[0] == 0) && \
1.49 + ((a)->u32[1] == 0) && \
1.50 + ((a)->u32[2] == 0) && \
1.51 + ((a)->u32[3] == 0))
1.52 +
1.53 +namespace mozilla {
1.54 +namespace net {
1.55 +
1.56 +// Required buffer size for text form of an IP address.
1.57 +// Includes space for null termination. We make our own contants
1.58 +// because we don't want higher-level code depending on things
1.59 +// like INET6_ADDRSTRLEN and having to include the associated
1.60 +// platform-specific headers.
1.61 +#ifdef XP_WIN
1.62 +// Windows requires longer buffers for some reason.
1.63 +const int kIPv4CStrBufSize = 22;
1.64 +const int kIPv6CStrBufSize = 65;
1.65 +const int kNetAddrMaxCStrBufSize = kIPv6CStrBufSize;
1.66 +#else
1.67 +const int kIPv4CStrBufSize = 16;
1.68 +const int kIPv6CStrBufSize = 46;
1.69 +const int kLocalCStrBufSize = 108;
1.70 +const int kNetAddrMaxCStrBufSize = kLocalCStrBufSize;
1.71 +#endif
1.72 +
1.73 +// This was all created at a time in which we were using NSPR for host
1.74 +// resolution and we were propagating NSPR types like "PRAddrInfo" and
1.75 +// "PRNetAddr" all over Gecko. This made it hard to use another host
1.76 +// resolver -- we were locked into NSPR. The goal here is to get away
1.77 +// from that. We'll translate what we get from NSPR or any other host
1.78 +// resolution library into the types below and use them in Gecko.
1.79 +
1.80 +union IPv6Addr {
1.81 + uint8_t u8[16];
1.82 + uint16_t u16[8];
1.83 + uint32_t u32[4];
1.84 + uint64_t u64[2];
1.85 +};
1.86 +
1.87 +// This struct is similar to operating system structs like "sockaddr", used for
1.88 +// things like "connect" and "getsockname". When tempted to cast or do dumb
1.89 +// copies of this struct to another struct, bear compiler-computed padding
1.90 +// in mind. The size of this struct, and the layout of the data in it, may
1.91 +// not be what you expect.
1.92 +union NetAddr {
1.93 + struct {
1.94 + uint16_t family; /* address family (0x00ff maskable) */
1.95 + char data[14]; /* raw address data */
1.96 + } raw;
1.97 + struct {
1.98 + uint16_t family; /* address family (AF_INET) */
1.99 + uint16_t port; /* port number */
1.100 + uint32_t ip; /* The actual 32 bits of address */
1.101 + } inet;
1.102 + struct {
1.103 + uint16_t family; /* address family (AF_INET6) */
1.104 + uint16_t port; /* port number */
1.105 + uint32_t flowinfo; /* routing information */
1.106 + IPv6Addr ip; /* the actual 128 bits of address */
1.107 + uint32_t scope_id; /* set of interfaces for a scope */
1.108 + } inet6;
1.109 +#if defined(XP_UNIX)
1.110 + struct { /* Unix domain socket address */
1.111 + uint16_t family; /* address family (AF_UNIX) */
1.112 + char path[104]; /* null-terminated pathname */
1.113 + } local;
1.114 +#endif
1.115 + // introduced to support nsTArray<NetAddr> (for DNSRequestParent.cpp)
1.116 + bool operator == (const NetAddr& other) const;
1.117 +};
1.118 +
1.119 +// This class wraps a NetAddr union to provide C++ linked list
1.120 +// capabilities and other methods. It is created from a PRNetAddr,
1.121 +// which is converted to a mozilla::dns::NetAddr.
1.122 +class NetAddrElement : public LinkedListElement<NetAddrElement> {
1.123 +public:
1.124 + NetAddrElement(const PRNetAddr *prNetAddr);
1.125 + NetAddrElement(const NetAddrElement& netAddr);
1.126 + ~NetAddrElement();
1.127 +
1.128 + NetAddr mAddress;
1.129 +};
1.130 +
1.131 +class AddrInfo {
1.132 +public:
1.133 + // Creates an AddrInfo object. It calls the AddrInfo(const char*, const char*)
1.134 + // to initialize the host and the cname.
1.135 + AddrInfo(const char *host, const PRAddrInfo *prAddrInfo, bool disableIPv4,
1.136 + const char *cname);
1.137 +
1.138 + // Creates a basic AddrInfo object (initialize only the host and the cname).
1.139 + AddrInfo(const char *host, const char *cname);
1.140 + ~AddrInfo();
1.141 +
1.142 + void AddAddress(NetAddrElement *address);
1.143 +
1.144 + size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
1.145 +
1.146 + char *mHostName;
1.147 + char *mCanonicalName;
1.148 + LinkedList<NetAddrElement> mAddresses;
1.149 +
1.150 +private:
1.151 + void Init(const char *host, const char *cname);
1.152 +};
1.153 +
1.154 +// Copies the contents of a PRNetAddr to a NetAddr.
1.155 +// Does not do a ptr safety check!
1.156 +void PRNetAddrToNetAddr(const PRNetAddr *prAddr, NetAddr *addr);
1.157 +
1.158 +// Copies the contents of a NetAddr to a PRNetAddr.
1.159 +// Does not do a ptr safety check!
1.160 +void NetAddrToPRNetAddr(const NetAddr *addr, PRNetAddr *prAddr);
1.161 +
1.162 +bool NetAddrToString(const NetAddr *addr, char *buf, uint32_t bufSize);
1.163 +
1.164 +bool IsLoopBackAddress(const NetAddr *addr);
1.165 +
1.166 +bool IsIPAddrAny(const NetAddr *addr);
1.167 +
1.168 +bool IsIPAddrV4Mapped(const NetAddr *addr);
1.169 +
1.170 +bool IsIPAddrLocal(const NetAddr *addr);
1.171 +
1.172 +nsresult GetPort(const NetAddr *aAddr, uint16_t *aResult);
1.173 +
1.174 +} // namespace net
1.175 +} // namespace mozilla
1.176 +
1.177 +#endif // DNS_h_
