Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 260 insertions, 0 deletions

diff --git a/netwerk/dns/DNS.h b/netwerk/dns/DNS.h
new file mode 100644
index 0000000000..a0dbbaa17d
--- /dev/null
+++ b/netwerk/dns/DNS.h
@@ -0,0 +1,260 @@
+/* -*- 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 "nsString.h"
+#include "prio.h"
+#include "prnetdb.h"
+#include "nsISupportsImpl.h"
+#include "mozilla/MemoryReporting.h"
+#include "nsTArray.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 {
+
+// IMPORTANT: when adding new values, always add them to the end, otherwise
+// it will mess up telemetry.
+// Stage_0: Receive the record before the http transaction is created.
+// Stage_1: Receive the record after the http transaction is created and the
+//          transaction is not dispatched.
+// Stage_2: Receive the record after the http transaction is dispatched.
+enum HTTPSSVC_RECEIVED_STAGE : uint32_t {
+  HTTPSSVC_NOT_PRESENT = 0,
+  HTTPSSVC_WITH_IPHINT_RECEIVED_STAGE_0 = 1,
+  HTTPSSVC_WITHOUT_IPHINT_RECEIVED_STAGE_0 = 2,
+  HTTPSSVC_WITH_IPHINT_RECEIVED_STAGE_1 = 3,
+  HTTPSSVC_WITHOUT_IPHINT_RECEIVED_STAGE_1 = 4,
+  HTTPSSVC_WITH_IPHINT_RECEIVED_STAGE_2 = 5,
+  HTTPSSVC_WITHOUT_IPHINT_RECEIVED_STAGE_2 = 6,
+  HTTPSSVC_NOT_USED = 7,
+  HTTPSSVC_NO_USABLE_RECORD = 8,
+};
+
+#define HTTPS_RR_IS_USED(s) \
+  (s > HTTPSSVC_NOT_PRESENT && s < HTTPSSVC_WITH_IPHINT_RECEIVED_STAGE_2)
+
+// 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;
+
+  inline NetAddr& operator=(const NetAddr& other) {
+    memcpy(this, &other, sizeof(NetAddr));
+    return *this;
+  }
+
+  NetAddr() { memset(this, 0, sizeof(NetAddr)); }
+  explicit NetAddr(const PRNetAddr* prAddr);
+
+  // Will parse aString into a NetAddr using PR_StringToNetAddr.
+  // Returns an error code if parsing fails.
+  // If aPort is non-0 will set the NetAddr's port to (the network endian
+  // value of) that.
+  nsresult InitFromString(const nsACString& aString, uint16_t aPort = 0);
+
+  bool IsIPAddrAny() const;
+  bool IsLoopbackAddr() const;
+  bool IsLoopBackAddressWithoutIPv6Mapping() const;
+  bool IsIPAddrV4() const;
+  bool IsIPAddrV4Mapped() const;
+  bool IsIPAddrLocal() const;
+  bool IsIPAddrShared() const;
+  nsresult GetPort(uint16_t* aResult) const;
+  bool ToStringBuffer(char* buf, uint32_t bufSize) const;
+  nsCString ToString() const;
+};
+
+enum class DNSResolverType : uint32_t { Native = 0, TRR };
+
+class AddrInfo {
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AddrInfo)
+
+ public:
+  static const uint32_t NO_TTL_DATA = (uint32_t)-1;
+
+  // Creates an AddrInfo object.
+  explicit AddrInfo(const nsACString& host, const PRAddrInfo* prAddrInfo,
+                    bool disableIPv4, bool filterNameCollision,
+                    const nsACString& cname);
+
+  // Creates a basic AddrInfo object (initialize only the host, cname and TRR
+  // type).
+  explicit AddrInfo(const nsACString& host, const nsACString& cname,
+                    DNSResolverType aResolverType, unsigned int aTRRType,
+                    nsTArray<NetAddr>&& addresses);
+
+  // Creates a basic AddrInfo object (initialize only the host and TRR status).
+  explicit AddrInfo(const nsACString& host, DNSResolverType aResolverType,
+                    unsigned int aTRRType, nsTArray<NetAddr>&& addresses,
+                    uint32_t aTTL = NO_TTL_DATA);
+
+  explicit AddrInfo(const AddrInfo* src);  // copy
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
+
+  bool IsTRR() const { return mResolverType == DNSResolverType::TRR; }
+  DNSResolverType ResolverType() const { return mResolverType; }
+  unsigned int TRRType() { return mTRRType; }
+
+  double GetTrrFetchDuration() { return mTrrFetchDuration; }
+  double GetTrrFetchDurationNetworkOnly() {
+    return mTrrFetchDurationNetworkOnly;
+  }
+
+  const nsTArray<NetAddr>& Addresses() { return mAddresses; }
+  const nsCString& Hostname() { return mHostName; }
+  const nsCString& CanonicalHostname() { return mCanonicalName; }
+  uint32_t TTL() { return ttl; }
+
+  class MOZ_STACK_CLASS AddrInfoBuilder {
+   public:
+    explicit AddrInfoBuilder(AddrInfo* aInfo) {
+      mInfo = new AddrInfo(aInfo);  // Clone it
+    }
+
+    void SetTrrFetchDurationNetworkOnly(double aTime) {
+      mInfo->mTrrFetchDurationNetworkOnly = aTime;
+    }
+
+    void SetTrrFetchDuration(double aTime) { mInfo->mTrrFetchDuration = aTime; }
+
+    void SetTTL(uint32_t aTTL) { mInfo->ttl = aTTL; }
+
+    void SetAddresses(nsTArray<NetAddr>&& addresses) {
+      mInfo->mAddresses = std::move(addresses);
+    }
+
+    void SetCanonicalHostname(const nsACString& aCname) {
+      mInfo->mCanonicalName = aCname;
+    }
+
+    already_AddRefed<AddrInfo> Finish() { return mInfo.forget(); }
+
+   private:
+    RefPtr<AddrInfo> mInfo;
+  };
+
+  AddrInfoBuilder Build() { return AddrInfoBuilder(this); }
+
+ private:
+  ~AddrInfo();
+  uint32_t ttl = NO_TTL_DATA;
+
+  nsCString mHostName;
+  nsCString mCanonicalName;
+  DNSResolverType mResolverType = DNSResolverType::Native;
+  unsigned int mTRRType = 0;
+  double mTrrFetchDuration = 0;
+  double mTrrFetchDurationNetworkOnly = 0;
+
+  nsTArray<NetAddr> mAddresses;
+};
+
+// 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 IsLoopbackHostname(const nsACString& aAsciiHost);
+
+bool HostIsIPLiteral(const nsACString& aAsciiHost);
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // DNS_h_