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-rw-r--r--toolkit/system/osxproxy/ProxyUtils.mm182
1 files changed, 182 insertions, 0 deletions
diff --git a/toolkit/system/osxproxy/ProxyUtils.mm b/toolkit/system/osxproxy/ProxyUtils.mm
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+++ b/toolkit/system/osxproxy/ProxyUtils.mm
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "ProxyUtils.h"
+#include "nsTArray.h"
+#include "prnetdb.h"
+#include "prtypes.h"
+
+namespace mozilla {
+namespace toolkit {
+namespace system {
+
+/**
+ * Normalize the short IP form into the complete form.
+ * For example, it converts "192.168" into "192.168.0.0"
+ */
+static bool
+NormalizeAddr(const nsACString& aAddr, nsCString& aNormalized)
+{
+ nsTArray<nsCString> addr;
+ if (!ParseString(aAddr, '.', addr)) {
+ return false;
+ }
+ aNormalized = "";
+ for (uint32_t i = 0; i < 4; ++i) {
+ if (i != 0) {
+ aNormalized.Append(".");
+ }
+ if (i < addr.Length()) {
+ aNormalized.Append(addr[i]);
+ } else {
+ aNormalized.Append("0");
+ }
+ }
+ return true;
+}
+
+static PRUint32
+MaskIPv4Addr(PRUint32 aAddr, uint16_t aMaskLen)
+{
+ if (aMaskLen == 32) {
+ return aAddr;
+ }
+ return PR_htonl(PR_ntohl(aAddr) & (~0L << (32 - aMaskLen)));
+}
+
+static void
+MaskIPv6Addr(PRIPv6Addr& aAddr, uint16_t aMaskLen)
+{
+ if (aMaskLen == 128) {
+ return;
+ }
+
+ if (aMaskLen > 96) {
+ aAddr.pr_s6_addr32[3] = PR_htonl(
+ PR_ntohl(aAddr.pr_s6_addr32[3]) & (~0L << (128 - aMaskLen)));
+ } else if (aMaskLen > 64) {
+ aAddr.pr_s6_addr32[3] = 0;
+ aAddr.pr_s6_addr32[2] = PR_htonl(
+ PR_ntohl(aAddr.pr_s6_addr32[2]) & (~0L << (96 - aMaskLen)));
+ } else if (aMaskLen > 32) {
+ aAddr.pr_s6_addr32[3] = 0;
+ aAddr.pr_s6_addr32[2] = 0;
+ aAddr.pr_s6_addr32[1] = PR_htonl(
+ PR_ntohl(aAddr.pr_s6_addr32[1]) & (~0L << (64 - aMaskLen)));
+ } else {
+ aAddr.pr_s6_addr32[3] = 0;
+ aAddr.pr_s6_addr32[2] = 0;
+ aAddr.pr_s6_addr32[1] = 0;
+ aAddr.pr_s6_addr32[0] = PR_htonl(
+ PR_ntohl(aAddr.pr_s6_addr32[0]) & (~0L << (32 - aMaskLen)));
+ }
+
+ return;
+}
+
+static bool
+IsMatchMask(const nsACString& aHost, const nsACString& aOverride)
+{
+ nsresult rv;
+
+ auto tokenEnd = aOverride.FindChar('/');
+ if (tokenEnd == -1) {
+ return false;
+ }
+
+ nsAutoCString prefixStr(Substring(aOverride,
+ tokenEnd + 1,
+ aOverride.Length() - tokenEnd - 1));
+ auto maskLen = prefixStr.ToInteger(&rv);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return false;
+ }
+
+ nsAutoCString override(aOverride);
+ if (!NormalizeAddr(Substring(aOverride, 0, tokenEnd), override)) {
+ return false;
+ }
+
+ PRNetAddr prAddrHost;
+ PRNetAddr prAddrOverride;
+ if (PR_SUCCESS != PR_StringToNetAddr(PromiseFlatCString(aHost).get(),
+ &prAddrHost) ||
+ PR_SUCCESS != PR_StringToNetAddr(override.get(),
+ &prAddrOverride)) {
+ return false;
+ }
+
+ if (prAddrHost.raw.family == PR_AF_INET &&
+ prAddrOverride.raw.family == PR_AF_INET) {
+ return MaskIPv4Addr(prAddrHost.inet.ip, maskLen) ==
+ MaskIPv4Addr(prAddrOverride.inet.ip, maskLen);
+ }
+ else if (prAddrHost.raw.family == PR_AF_INET6 &&
+ prAddrOverride.raw.family == PR_AF_INET6) {
+ MaskIPv6Addr(prAddrHost.ipv6.ip, maskLen);
+ MaskIPv6Addr(prAddrOverride.ipv6.ip, maskLen);
+
+ return memcmp(&prAddrHost.ipv6.ip,
+ &prAddrOverride.ipv6.ip,
+ sizeof(PRIPv6Addr)) == 0;
+ }
+
+ return false;
+}
+
+static bool
+IsMatchWildcard(const nsACString& aHost, const nsACString& aOverride)
+{
+ nsAutoCString host(aHost);
+ nsAutoCString override(aOverride);
+
+ int32_t overrideLength = override.Length();
+ int32_t tokenStart = 0;
+ int32_t offset = 0;
+ bool star = false;
+
+ while (tokenStart < overrideLength) {
+ int32_t tokenEnd = override.FindChar('*', tokenStart);
+ if (tokenEnd == tokenStart) {
+ // Star is the first character in the token.
+ star = true;
+ tokenStart++;
+ // If the character following the '*' is a '.' character then skip
+ // it so that "*.foo.com" allows "foo.com".
+ if (override.FindChar('.', tokenStart) == tokenStart) {
+ nsAutoCString token(Substring(override,
+ tokenStart + 1,
+ overrideLength - tokenStart - 1));
+ if (host.Equals(token)) {
+ return true;
+ }
+ }
+ } else {
+ if (tokenEnd == -1) {
+ tokenEnd = overrideLength; // no '*' char, match rest of string
+ }
+ nsAutoCString token(Substring(override, tokenStart, tokenEnd - tokenStart));
+ offset = host.Find(token, offset);
+ if (offset == -1 || (!star && offset)) {
+ return false;
+ }
+ star = false;
+ tokenStart = tokenEnd;
+ offset += token.Length();
+ }
+ }
+
+ return (star || (offset == static_cast<int32_t>(host.Length())));
+}
+
+bool
+IsHostProxyEntry(const nsACString& aHost, const nsACString& aOverride)
+{
+ return IsMatchMask(aHost, aOverride) || IsMatchWildcard(aHost, aOverride);
+}
+
+} // namespace system
+} // namespace toolkit
+} // namespace mozilla