Add m-esr52 at 52.6.0

1 files changed, 183 insertions, 0 deletions

diff --git a/netwerk/dns/DNS.h b/netwerk/dns/DNS.h
new file mode 100644
index 000000000..22e1f31f1
--- /dev/null
+++ b/netwerk/dns/DNS.h
@@ -0,0 +1,183 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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/. */
+
+#ifndef DNS_h_
+#define DNS_h_
+
+#include "nscore.h"
+#include "prio.h"
+#include "prnetdb.h"
+#include "plstr.h"
+#include "mozilla/LinkedList.h"
+#include "mozilla/MemoryReporting.h"
+
+#if !defined(XP_WIN)
+#include <arpa/inet.h>
+#endif
+
+#ifdef XP_WIN
+#include "winsock2.h"
+#endif
+
+#ifndef AF_LOCAL
+#define AF_LOCAL 1  // used for named pipe
+#endif
+
+#define IPv6ADDR_IS_LOOPBACK(a) \
+  (((a)->u32[0] == 0)     &&    \
+   ((a)->u32[1] == 0)     &&    \
+   ((a)->u32[2] == 0)     &&    \
+   ((a)->u8[12] == 0)     &&    \
+   ((a)->u8[13] == 0)     &&    \
+   ((a)->u8[14] == 0)     &&    \
+   ((a)->u8[15] == 0x1U))
+
+#define IPv6ADDR_IS_V4MAPPED(a) \
+  (((a)->u32[0] == 0)     &&    \
+   ((a)->u32[1] == 0)     &&    \
+   ((a)->u8[8] == 0)      &&    \
+   ((a)->u8[9] == 0)      &&    \
+   ((a)->u8[10] == 0xff)  &&    \
+   ((a)->u8[11] == 0xff))
+
+#define IPv6ADDR_V4MAPPED_TO_IPADDR(a) ((a)->u32[3])
+
+#define IPv6ADDR_IS_UNSPECIFIED(a) \
+  (((a)->u32[0] == 0)  &&          \
+   ((a)->u32[1] == 0)  &&          \
+   ((a)->u32[2] == 0)  &&          \
+   ((a)->u32[3] == 0))
+
+namespace mozilla {
+namespace net {
+
+// Required buffer size for text form of an IP address.
+// Includes space for null termination. We make our own contants
+// because we don't want higher-level code depending on things
+// like INET6_ADDRSTRLEN and having to include the associated
+// platform-specific headers.
+#ifdef XP_WIN
+// Windows requires longer buffers for some reason.
+const int kIPv4CStrBufSize = 22;
+const int kIPv6CStrBufSize = 65;
+const int kNetAddrMaxCStrBufSize = kIPv6CStrBufSize;
+#else
+const int kIPv4CStrBufSize = 16;
+const int kIPv6CStrBufSize = 46;
+const int kLocalCStrBufSize = 108;
+const int kNetAddrMaxCStrBufSize = kLocalCStrBufSize;
+#endif
+
+// This was all created at a time in which we were using NSPR for host
+// resolution and we were propagating NSPR types like "PRAddrInfo" and
+// "PRNetAddr" all over Gecko. This made it hard to use another host
+// resolver -- we were locked into NSPR. The goal here is to get away
+// from that. We'll translate what we get from NSPR or any other host
+// resolution library into the types below and use them in Gecko.
+
+union IPv6Addr {
+  uint8_t  u8[16];
+  uint16_t u16[8];
+  uint32_t u32[4];
+  uint64_t u64[2];
+};
+
+// This struct is similar to operating system structs like "sockaddr", used for
+// things like "connect" and "getsockname". When tempted to cast or do dumb
+// copies of this struct to another struct, bear compiler-computed padding
+// in mind. The size of this struct, and the layout of the data in it, may
+// not be what you expect.
+union NetAddr {
+  struct {
+    uint16_t family;                /* address family (0x00ff maskable) */
+    char data[14];                  /* raw address data */
+  } raw;
+  struct {
+    uint16_t family;                /* address family (AF_INET) */
+    uint16_t port;                  /* port number */
+    uint32_t ip;                    /* The actual 32 bits of address */
+  } inet;
+  struct {
+    uint16_t family;                /* address family (AF_INET6) */
+    uint16_t port;                  /* port number */
+    uint32_t flowinfo;              /* routing information */
+    IPv6Addr ip;                    /* the actual 128 bits of address */
+    uint32_t scope_id;              /* set of interfaces for a scope */
+  } inet6;
+#if defined(XP_UNIX) || defined(XP_WIN)
+  struct {                          /* Unix domain socket or
+                                       Windows Named Pipes address */
+    uint16_t family;                /* address family (AF_UNIX) */
+    char path[104];                 /* null-terminated pathname */
+  } local;
+#endif
+  // introduced to support nsTArray<NetAddr> comparisons and sorting
+  bool operator == (const NetAddr& other) const;
+  bool operator < (const NetAddr &other) const;
+};
+
+// This class wraps a NetAddr union to provide C++ linked list
+// capabilities and other methods. It is created from a PRNetAddr,
+// which is converted to a mozilla::dns::NetAddr.
+class NetAddrElement : public LinkedListElement<NetAddrElement> {
+public:
+  explicit NetAddrElement(const PRNetAddr *prNetAddr);
+  NetAddrElement(const NetAddrElement& netAddr);
+  ~NetAddrElement();
+
+  NetAddr mAddress;
+};
+
+class AddrInfo {
+public:
+  // Creates an AddrInfo object. It calls the AddrInfo(const char*, const char*)
+  // to initialize the host and the cname.
+  AddrInfo(const char *host, const PRAddrInfo *prAddrInfo, bool disableIPv4,
+           bool filterNameCollision, const char *cname);
+
+  // Creates a basic AddrInfo object (initialize only the host and the cname).
+  AddrInfo(const char *host, const char *cname);
+  ~AddrInfo();
+
+  void AddAddress(NetAddrElement *address);
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
+
+  char *mHostName;
+  char *mCanonicalName;
+  uint16_t ttl;
+  static const uint16_t NO_TTL_DATA = (uint16_t) -1;
+
+  LinkedList<NetAddrElement> mAddresses;
+
+private:
+  void Init(const char *host, const char *cname);
+};
+
+// Copies the contents of a PRNetAddr to a NetAddr.
+// Does not do a ptr safety check!
+void PRNetAddrToNetAddr(const PRNetAddr *prAddr, NetAddr *addr);
+
+// Copies the contents of a NetAddr to a PRNetAddr.
+// Does not do a ptr safety check!
+void NetAddrToPRNetAddr(const NetAddr *addr, PRNetAddr *prAddr);
+
+bool NetAddrToString(const NetAddr *addr, char *buf, uint32_t bufSize);
+
+bool IsLoopBackAddress(const NetAddr *addr);
+
+bool IsIPAddrAny(const NetAddr *addr);
+
+bool IsIPAddrV4Mapped(const NetAddr *addr);
+
+bool IsIPAddrLocal(const NetAddr *addr);
+
+nsresult GetPort(const NetAddr *aAddr, uint16_t *aResult);
+
+} // namespace net
+} // namespace mozilla
+
+#endif // DNS_h_