Add m-esr52 at 52.6.0

1 files changed, 368 insertions, 0 deletions

diff --git a/netwerk/dns/DNS.cpp b/netwerk/dns/DNS.cpp
new file mode 100644
index 000000000..643296af0
--- /dev/null
+++ b/netwerk/dns/DNS.cpp
@@ -0,0 +1,368 @@
+/* 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/. */
+
+#include "mozilla/net/DNS.h"
+
+#include "mozilla/Assertions.h"
+#include "mozilla/mozalloc.h"
+#include "mozilla/ArrayUtils.h"
+#include <string.h>
+
+#ifdef XP_WIN
+#include "ws2tcpip.h"
+#endif
+
+namespace mozilla {
+namespace net {
+
+const char *inet_ntop_internal(int af, const void *src, char *dst, socklen_t size)
+{
+#ifdef XP_WIN
+  if (af == AF_INET) {
+    struct sockaddr_in s;
+    memset(&s, 0, sizeof(s));
+    s.sin_family = AF_INET;
+    memcpy(&s.sin_addr, src, sizeof(struct in_addr));
+    int result = getnameinfo((struct sockaddr *)&s, sizeof(struct sockaddr_in),
+                             dst, size, nullptr, 0, NI_NUMERICHOST);
+    if (result == 0) {
+      return dst;
+    }
+  }
+  else if (af == AF_INET6) {
+    struct sockaddr_in6 s;
+    memset(&s, 0, sizeof(s));
+    s.sin6_family = AF_INET6;
+    memcpy(&s.sin6_addr, src, sizeof(struct in_addr6));
+    int result = getnameinfo((struct sockaddr *)&s, sizeof(struct sockaddr_in6),
+                             dst, size, nullptr, 0, NI_NUMERICHOST);
+    if (result == 0) {
+      return dst;
+    }
+  }
+  return nullptr;
+#else
+  return inet_ntop(af, src, dst, size);
+#endif
+}
+
+// Copies the contents of a PRNetAddr to a NetAddr.
+// Does not do a ptr safety check!
+void PRNetAddrToNetAddr(const PRNetAddr *prAddr, NetAddr *addr)
+{
+  if (prAddr->raw.family == PR_AF_INET) {
+    addr->inet.family = AF_INET;
+    addr->inet.port = prAddr->inet.port;
+    addr->inet.ip = prAddr->inet.ip;
+  }
+  else if (prAddr->raw.family == PR_AF_INET6) {
+    addr->inet6.family = AF_INET6;
+    addr->inet6.port = prAddr->ipv6.port;
+    addr->inet6.flowinfo = prAddr->ipv6.flowinfo;
+    memcpy(&addr->inet6.ip, &prAddr->ipv6.ip, sizeof(addr->inet6.ip.u8));
+    addr->inet6.scope_id = prAddr->ipv6.scope_id;
+  }
+#if defined(XP_UNIX)
+  else if (prAddr->raw.family == PR_AF_LOCAL) {
+    addr->local.family = AF_LOCAL;
+    memcpy(addr->local.path, prAddr->local.path, sizeof(addr->local.path));
+  }
+#endif
+}
+
+// Copies the contents of a NetAddr to a PRNetAddr.
+// Does not do a ptr safety check!
+void NetAddrToPRNetAddr(const NetAddr *addr, PRNetAddr *prAddr)
+{
+  if (addr->raw.family == AF_INET) {
+    prAddr->inet.family = PR_AF_INET;
+    prAddr->inet.port = addr->inet.port;
+    prAddr->inet.ip = addr->inet.ip;
+  }
+  else if (addr->raw.family == AF_INET6) {
+    prAddr->ipv6.family = PR_AF_INET6;
+    prAddr->ipv6.port = addr->inet6.port;
+    prAddr->ipv6.flowinfo = addr->inet6.flowinfo;
+    memcpy(&prAddr->ipv6.ip, &addr->inet6.ip, sizeof(addr->inet6.ip.u8));
+    prAddr->ipv6.scope_id = addr->inet6.scope_id;
+  }
+#if defined(XP_UNIX)
+  else if (addr->raw.family == AF_LOCAL) {
+    prAddr->local.family = PR_AF_LOCAL;
+    memcpy(prAddr->local.path, addr->local.path, sizeof(addr->local.path));
+  }
+#elif defined(XP_WIN)
+  else if (addr->raw.family == AF_LOCAL) {
+    prAddr->local.family = PR_AF_LOCAL;
+    memcpy(prAddr->local.path, addr->local.path, sizeof(addr->local.path));
+  }
+#endif
+}
+
+bool NetAddrToString(const NetAddr *addr, char *buf, uint32_t bufSize)
+{
+  if (addr->raw.family == AF_INET) {
+    if (bufSize < INET_ADDRSTRLEN) {
+      return false;
+    }
+    struct in_addr nativeAddr = {};
+    nativeAddr.s_addr = addr->inet.ip;
+    return !!inet_ntop_internal(AF_INET, &nativeAddr, buf, bufSize);
+  }
+  else if (addr->raw.family == AF_INET6) {
+    if (bufSize < INET6_ADDRSTRLEN) {
+      return false;
+    }
+    struct in6_addr nativeAddr = {};
+    memcpy(&nativeAddr.s6_addr, &addr->inet6.ip, sizeof(addr->inet6.ip.u8));
+    return !!inet_ntop_internal(AF_INET6, &nativeAddr, buf, bufSize);
+  }
+#if defined(XP_UNIX)
+  else if (addr->raw.family == AF_LOCAL) {
+    if (bufSize < sizeof(addr->local.path)) {
+      // Many callers don't bother checking our return value, so
+      // null-terminate just in case.
+      if (bufSize > 0) {
+          buf[0] = '\0';
+      }
+      return false;
+    }
+
+    // Usually, the size passed to memcpy should be the size of the
+    // destination. Here, we know that the source is no larger than the
+    // destination, so using the source's size is always safe, whereas
+    // using the destination's size may cause us to read off the end of the
+    // source.
+    memcpy(buf, addr->local.path, sizeof(addr->local.path));
+    return true;
+  }
+#endif
+  return false;
+}
+
+bool IsLoopBackAddress(const NetAddr *addr)
+{
+  if (addr->raw.family == AF_INET) {
+    return (addr->inet.ip == htonl(INADDR_LOOPBACK));
+  }
+  else if (addr->raw.family == AF_INET6) {
+    if (IPv6ADDR_IS_LOOPBACK(&addr->inet6.ip)) {
+      return true;
+    } else if (IPv6ADDR_IS_V4MAPPED(&addr->inet6.ip) &&
+               IPv6ADDR_V4MAPPED_TO_IPADDR(&addr->inet6.ip) == htonl(INADDR_LOOPBACK)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool IsIPAddrAny(const NetAddr *addr)
+{
+  if (addr->raw.family == AF_INET) {
+    if (addr->inet.ip == htonl(INADDR_ANY)) {
+      return true;
+    }
+  }
+  else if (addr->raw.family == AF_INET6) {
+    if (IPv6ADDR_IS_UNSPECIFIED(&addr->inet6.ip)) {
+      return true;
+    } else if (IPv6ADDR_IS_V4MAPPED(&addr->inet6.ip) &&
+               IPv6ADDR_V4MAPPED_TO_IPADDR(&addr->inet6.ip) == htonl(INADDR_ANY)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool IsIPAddrV4Mapped(const NetAddr *addr)
+{
+  if (addr->raw.family == AF_INET6) {
+    return IPv6ADDR_IS_V4MAPPED(&addr->inet6.ip);
+  }
+  return false;
+}
+
+bool IsIPAddrLocal(const NetAddr *addr)
+{
+  MOZ_ASSERT(addr);
+
+  // IPv4 RFC1918 and Link Local Addresses.
+  if (addr->raw.family == AF_INET) {
+    uint32_t addr32 = ntohl(addr->inet.ip);
+    if (addr32 >> 24 == 0x0A ||    // 10/8 prefix (RFC 1918).
+        addr32 >> 20 == 0xAC1 ||   // 172.16/12 prefix (RFC 1918).
+        addr32 >> 16 == 0xC0A8 ||  // 192.168/16 prefix (RFC 1918).
+        addr32 >> 16 == 0xA9FE) {  // 169.254/16 prefix (Link Local).
+      return true;
+    }
+  }
+  // IPv6 Unique and Link Local Addresses.
+  if (addr->raw.family == AF_INET6) {
+    uint16_t addr16 = ntohs(addr->inet6.ip.u16[0]);
+    if (addr16 >> 9 == 0xfc >> 1 ||   // fc00::/7 Unique Local Address.
+        addr16 >> 6 == 0xfe80 >> 6) { // fe80::/10 Link Local Address.
+      return true;
+    }
+  }
+  // Not an IPv4/6 local address.
+  return false;
+}
+
+nsresult
+GetPort(const NetAddr *aAddr, uint16_t *aResult)
+{
+  uint16_t port;
+  if (aAddr->raw.family == PR_AF_INET) {
+    port = aAddr->inet.port;
+  } else if (aAddr->raw.family == PR_AF_INET6) {
+    port = aAddr->inet6.port;
+  } else {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  *aResult = ntohs(port);
+  return NS_OK;
+}
+
+bool
+NetAddr::operator == (const NetAddr& other) const
+{
+  if (this->raw.family != other.raw.family) {
+    return false;
+  } else if (this->raw.family == AF_INET) {
+    return (this->inet.port == other.inet.port) &&
+           (this->inet.ip == other.inet.ip);
+  } else if (this->raw.family == AF_INET6) {
+    return (this->inet6.port == other.inet6.port) &&
+           (this->inet6.flowinfo == other.inet6.flowinfo) &&
+           (memcmp(&this->inet6.ip, &other.inet6.ip,
+                   sizeof(this->inet6.ip)) == 0) &&
+           (this->inet6.scope_id == other.inet6.scope_id);
+#if defined(XP_UNIX)
+  } else if (this->raw.family == AF_LOCAL) {
+    return PL_strncmp(this->local.path, other.local.path,
+                      ArrayLength(this->local.path));
+#endif
+  }
+  return false;
+}
+
+bool
+NetAddr::operator < (const NetAddr& other) const
+{
+    if (this->raw.family != other.raw.family) {
+        return this->raw.family < other.raw.family;
+    } else if (this->raw.family == AF_INET) {
+        if (this->inet.ip == other.inet.ip) {
+            return this->inet.port < other.inet.port;
+        } else {
+            return this->inet.ip < other.inet.ip;
+        }
+    } else if (this->raw.family == AF_INET6) {
+        int cmpResult = memcmp(&this->inet6.ip, &other.inet6.ip,
+                               sizeof(this->inet6.ip));
+        if (cmpResult) {
+            return cmpResult < 0;
+        } else if (this->inet6.port != other.inet6.port) {
+            return this->inet6.port < other.inet6.port;
+        } else {
+            return this->inet6.flowinfo < other.inet6.flowinfo;
+        }
+    }
+    return false;
+}
+
+NetAddrElement::NetAddrElement(const PRNetAddr *prNetAddr)
+{
+  PRNetAddrToNetAddr(prNetAddr, &mAddress);
+}
+
+NetAddrElement::NetAddrElement(const NetAddrElement& netAddr)
+{
+  mAddress = netAddr.mAddress;
+}
+
+NetAddrElement::~NetAddrElement() = default;
+
+AddrInfo::AddrInfo(const char *host, const PRAddrInfo *prAddrInfo,
+                   bool disableIPv4, bool filterNameCollision, const char *cname)
+  : mHostName(nullptr)
+  , mCanonicalName(nullptr)
+  , ttl(NO_TTL_DATA)
+{
+  MOZ_ASSERT(prAddrInfo, "Cannot construct AddrInfo with a null prAddrInfo pointer!");
+  const uint32_t nameCollisionAddr = htonl(0x7f003535); // 127.0.53.53
+
+  Init(host, cname);
+  PRNetAddr tmpAddr;
+  void *iter = nullptr;
+  do {
+    iter = PR_EnumerateAddrInfo(iter, prAddrInfo, 0, &tmpAddr);
+    bool addIt = iter &&
+        (!disableIPv4 || tmpAddr.raw.family != PR_AF_INET) &&
+        (!filterNameCollision || tmpAddr.raw.family != PR_AF_INET || (tmpAddr.inet.ip != nameCollisionAddr));
+    if (addIt) {
+        auto *addrElement = new NetAddrElement(&tmpAddr);
+        mAddresses.insertBack(addrElement);
+    }
+  } while (iter);
+}
+
+AddrInfo::AddrInfo(const char *host, const char *cname)
+  : mHostName(nullptr)
+  , mCanonicalName(nullptr)
+  , ttl(NO_TTL_DATA)
+{
+  Init(host, cname);
+}
+
+AddrInfo::~AddrInfo()
+{
+  NetAddrElement *addrElement;
+  while ((addrElement = mAddresses.popLast())) {
+    delete addrElement;
+  }
+  free(mHostName);
+  free(mCanonicalName);
+}
+
+void
+AddrInfo::Init(const char *host, const char *cname)
+{
+  MOZ_ASSERT(host, "Cannot initialize AddrInfo with a null host pointer!");
+
+  ttl = NO_TTL_DATA;
+  size_t hostlen = strlen(host);
+  mHostName = static_cast<char*>(moz_xmalloc(hostlen + 1));
+  memcpy(mHostName, host, hostlen + 1);
+  if (cname) {
+    size_t cnameLen = strlen(cname);
+    mCanonicalName = static_cast<char*>(moz_xmalloc(cnameLen + 1));
+    memcpy(mCanonicalName, cname, cnameLen + 1);
+  }
+  else {
+    mCanonicalName = nullptr;
+  }
+}
+
+void
+AddrInfo::AddAddress(NetAddrElement *address)
+{
+  MOZ_ASSERT(address, "Cannot add the address to an uninitialized list");
+
+  mAddresses.insertBack(address);
+}
+
+size_t
+AddrInfo::SizeOfIncludingThis(MallocSizeOf mallocSizeOf) const
+{
+  size_t n = mallocSizeOf(this);
+  n += mallocSizeOf(mHostName);
+  n += mallocSizeOf(mCanonicalName);
+  n += mAddresses.sizeOfExcludingThis(mallocSizeOf);
+  return n;
+}
+
+} // namespace net
+} // namespace mozilla