deps: upgrade to c-ares v1.16.1

deps/cares/include/ares_version.h

@@ -7,11 +7,11 @@
 
 #define ARES_VERSION_MAJOR 1
 #define ARES_VERSION_MINOR 16
-#define ARES_VERSION_PATCH 0
+#define ARES_VERSION_PATCH 1
 #define ARES_VERSION ((ARES_VERSION_MAJOR<<16)|\
                        (ARES_VERSION_MINOR<<8)|\
                        (ARES_VERSION_PATCH))
-#define ARES_VERSION_STR "1.16.0"
+#define ARES_VERSION_STR "1.16.1"
 
 #if (ARES_VERSION >= 0x010700)
 #  define CARES_HAVE_ARES_LIBRARY_INIT 1

deps/cares/src/RELEASE-NOTES

@@ -1,85 +1,30 @@
-c-ares version 1.16.0
+c-ares version 1.16.1
+
+Security:
+ o Prevent possible use-after-free and double-free in ares_getaddrinfo() if
+   ares_destroy() is called prior to ares_getaddrinfo() completing.  Reported
+   by Jann Horn at Google Project Zero.
 
 Changes:
- o Introduction of ares_getaddrinfo() API which provides similar output
-   (including proper sorting as per RFC 6724) to the system native API, but
-   utilizes different data structures in order to provide additional information
-   such as TTLs and all aliases.  Please reference the respective man pages for
-   usage details. [3] [4] [5] [7] [8] [13] [14] [15] [16] [17] [22]
- o Parse SOA records from ns_t_any response [29] [30]
- o CMake: Provide c-ares version in package export file [24]
- o CMake: Add CPACK functionality for DEB and RPM [28]
- o CMake: Generate PDB files during build [33] [34]
- o CMake: Support manpage installation [37] [38]
+ o Allow TXT records on CHAOS qclass.  Used for retriving things like
+   version.bind, version.server, authoris.bind, hostname.bind, and id.server.
+   [3]
 
 Bug fixes:
- o Fix bad expectation in IPv6 localhost test. [1] [2]
- o AutoTools: use XC_CHECK_BUILD_FLAGS instead of XC_CHECK_USER_FLAGS to prevent
-   complaints about CPPFLAGS in CFLAGS. [6]
- o Fix .onion handling
- o Command line usage was out of date for adig and ahost. [18]
- o Typos in manpages [19] [20]
- o If ares_getenv is defined, it must return a value on all platforms [21]
- o If /etc/resolv.conf has invalid lookup values, use the defaults. [23]
- o Tests: Separate live tests from SetServers* tests as only live tests should
-   require internet access. [25]
- o ares_gethostbyname() should return ENODATA if no valid A or AAAA record is
-   found, but a CNAME was found. [26] [27]
- o CMake: Rework library function checking to prevent unintended linking with
-   system libraries that aren't needed. [31] [32]
- o Due to use of inet_addr() it was not possible to return 255.255.255.255 from
-   ares_gethostbyname(). [35] [36]
- o CMake: Fix building of tests on Windows
+ o Fix Windows Unicode incompatibilities with ares_getaddrinfo() [1]
+ o Silence false cast-align compiler warnings due to valid casts of
+   struct sockaddr to struct sockaddr_in and struct sockaddr_in6.
+ o MacOS should use libresolv for retrieving DNS servers, like iOS
+ o CMake build system should populate the INCLUDE_DIRECTORIES property of 
+   installed targets [2]
+ o Correct macros in use for the ares_getaddrinfo.3 man page
 
 Thanks go to these friendly people for their efforts and contributions:
- Abhishek Arya (@inferno-chromium), Adam Majer (@AdamMajer),
- Andrew Selivanov (@ki11roy), Ben Noordhuis (@bnoordhuis),
- Brad House (@bradh352), Christian Ammer (@ChristianAmmer), Dan Noé (@dnoe),
- Daniel Stenberg (@bagder), Darrin Cullop (@dwcullop),
- Dron Rathore (@DronRathore), Fabrice Fontaine (@ffontaine),
- Gregor Jasny (@gjasny), @kedixa, Khaidi Chu (@XadillaX),
- Kyle Edwards (@KyleFromKitware), @lifenjoiner, Michal Rostecki (@mrostecki),
- Peter Eisentraut (@petere), Piotr Pietraszkiewicz (@ppietrasa),
- Stephen Bryant (@bf-bryants), @tjwalton, Vy Nguyen (@oontvoo)
- (22 contributors)
+ Brad House (@bradh352), Daniel Stenberg (@bagder), Dmitry Igrishin (@dmitigr),
+ Jann Horn, Shelly Vohr, Teemu R (@rytilahti)
+ (6 contributors)
 
 References to bug reports and discussions on issues:
- [1] = https://github.com/c-ares/c-ares/pull/227
- [2] = https://github.com/c-ares/c-ares/issues/85
- [3] = https://github.com/c-ares/c-ares/pull/112
- [4] = https://github.com/c-ares/c-ares/pull/233
- [5] = https://github.com/c-ares/c-ares/pull/234
- [6] = https://github.com/c-ares/c-ares/pull/236
- [7] = https://github.com/c-ares/c-ares/pull/235
- [8] = https://github.com/c-ares/c-ares/pull/239
- [9] = https://github.com/c-ares/c-ares/pull/241
- [10] = https://github.com/c-ares/c-ares/pull/187
- [11] = https://github.com/c-ares/c-ares/pull/252
- [12] = https://github.com/c-ares/c-ares/issues/251
- [13] = https://github.com/c-ares/c-ares/pull/258
- [14] = https://github.com/c-ares/c-ares/pull/257
- [15] = https://github.com/c-ares/c-ares/pull/262
- [16] = https://github.com/c-ares/c-ares/pull/264
- [17] = https://github.com/c-ares/c-ares/pull/265
- [18] = https://github.com/c-ares/c-ares/pull/256
- [19] = https://github.com/c-ares/c-ares/pull/269
- [20] = https://github.com/c-ares/c-ares/pull/275
- [21] = https://github.com/c-ares/c-ares/pull/279
- [22] = https://github.com/c-ares/c-ares/pull/290
- [23] = https://github.com/c-ares/c-ares/pull/274
- [24] = https://github.com/c-ares/c-ares/pull/296
- [25] = https://github.com/c-ares/c-ares/pull/299
- [26] = https://github.com/c-ares/c-ares/pull/304
- [27] = https://github.com/c-ares/c-ares/issues/303
- [28] = https://github.com/c-ares/c-ares/pull/283
- [29] = https://github.com/c-ares/c-ares/pull/103
- [30] = https://github.com/c-ares/c-ares/issues/102
- [31] = https://github.com/c-ares/c-ares/pull/310
- [32] = https://github.com/c-ares/c-ares/issues/307
- [33] = https://github.com/c-ares/c-ares/pull/311
- [34] = https://github.com/c-ares/c-ares/issues/245
- [35] = https://github.com/c-ares/c-ares/issues/309
- [36] = https://github.com/c-ares/c-ares/pull/312
- [37] = https://github.com/c-ares/c-ares/issues/297
- [38] = https://github.com/c-ares/c-ares/pull/314
-
+ [1] = https://github.com/c-ares/c-ares/pull/328
+ [2] = https://github.com/c-ares/c-ares/pull/323
+ [3] = https://github.com/c-ares/c-ares/pull/321

deps/cares/src/ares_getaddrinfo.c

@@ -408,11 +408,11 @@ static void end_hquery(struct host_query *hquery, int status)
         {
           if (next->ai_family == AF_INET)
             {
-              ((struct sockaddr_in *)next->ai_addr)->sin_port = htons(hquery->port);
+              (CARES_INADDR_CAST(struct sockaddr_in *, next->ai_addr))->sin_port = htons(hquery->port);
             }
           else
             {
-              ((struct sockaddr_in6 *)next->ai_addr)->sin6_port = htons(hquery->port);
+              (CARES_INADDR_CAST(struct sockaddr_in6 *, next->ai_addr))->sin6_port = htons(hquery->port);
             }
           next = next->ai_next;
         }
@@ -456,18 +456,18 @@ static int file_lookup(struct host_query *hquery)
           char tmp[MAX_PATH];
           HKEY hkeyHosts;
 
-          if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0, KEY_READ,
+          if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0, KEY_READ,
                            &hkeyHosts) == ERROR_SUCCESS)
             {
               DWORD dwLength = MAX_PATH;
-              RegQueryValueEx(hkeyHosts, DATABASEPATH, NULL, NULL, (LPBYTE)tmp,
+              RegQueryValueExA(hkeyHosts, DATABASEPATH, NULL, NULL, (LPBYTE)tmp,
                               &dwLength);
-              ExpandEnvironmentStrings(tmp, PATH_HOSTS, MAX_PATH);
+              ExpandEnvironmentStringsA(tmp, PATH_HOSTS, MAX_PATH);
               RegCloseKey(hkeyHosts);
             }
         }
       else if (platform == WIN_9X)
-        GetWindowsDirectory(PATH_HOSTS, MAX_PATH);
+        GetWindowsDirectoryA(PATH_HOSTS, MAX_PATH);
       else
         return ARES_ENOTFOUND;
 
@@ -548,6 +548,7 @@ static void host_callback(void *arg, int status, int timeouts,
   else if (status == ARES_EDESTRUCTION)
     {
       end_hquery(hquery, status);
+      return;
     }
 
   if (!hquery->remaining)

deps/cares/src/ares_getnameinfo.c

@@ -92,13 +92,13 @@ void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa,
   if ((sa->sa_family == AF_INET) &&
       (salen == sizeof(struct sockaddr_in)))
     {
-      addr = (struct sockaddr_in *)sa;
+      addr = CARES_INADDR_CAST(struct sockaddr_in *, sa);
       port = addr->sin_port;
     }
   else if ((sa->sa_family == AF_INET6) &&
            (salen == sizeof(struct sockaddr_in6)))
     {
-      addr6 = (struct sockaddr_in6 *)sa;
+      addr6 = CARES_INADDR_CAST(struct sockaddr_in6 *, sa);
       port = addr6->sin6_port;
     }
   else

deps/cares/src/ares_parse_a_reply.c

@@ -163,7 +163,7 @@ int ares_parse_a_reply(const unsigned char *abuf, int alen,
             {
               hostent->h_addr_list[i] = (char *)&addrs[i];
               memcpy(hostent->h_addr_list[i],
-                     &(((struct sockaddr_in *)next->ai_addr)->sin_addr),
+                     &(CARES_INADDR_CAST(struct sockaddr_in *, next->ai_addr)->sin_addr),
                      sizeof(struct in_addr));
               if (naddrttls && i < *naddrttls)
                 {
@@ -173,7 +173,7 @@ int ares_parse_a_reply(const unsigned char *abuf, int alen,
                     addrttls[i].ttl = next->ai_ttl;
 
                   memcpy(&addrttls[i].ipaddr,
-                         &(((struct sockaddr_in *)next->ai_addr)->sin_addr),
+                         &(CARES_INADDR_CAST(struct sockaddr_in *, next->ai_addr)->sin_addr),
                          sizeof(struct in_addr));
                 }
               ++i;

deps/cares/src/ares_parse_aaaa_reply.c

@@ -165,7 +165,7 @@ int ares_parse_aaaa_reply(const unsigned char *abuf, int alen,
             {
               hostent->h_addr_list[i] = (char*)&addrs[i];
               memcpy(hostent->h_addr_list[i],
-                     &(((struct sockaddr_in6 *)next->ai_addr)->sin6_addr),
+                     &(CARES_INADDR_CAST(struct sockaddr_in6 *, next->ai_addr)->sin6_addr),
                      sizeof(struct ares_in6_addr));
               if (naddrttls && i < *naddrttls)
                 {
@@ -175,7 +175,7 @@ int ares_parse_aaaa_reply(const unsigned char *abuf, int alen,
                       addrttls[i].ttl = next->ai_ttl;
 
                     memcpy(&addrttls[i].ip6addr,
-                           &(((struct sockaddr_in6 *)next->ai_addr)->sin6_addr),
+                           &(CARES_INADDR_CAST(struct sockaddr_in6 *, next->ai_addr)->sin6_addr),
                            sizeof(struct ares_in6_addr));
                 }
               ++i;

deps/cares/src/ares_parse_txt_reply.c

@@ -113,7 +113,7 @@ ares__parse_txt_reply (const unsigned char *abuf, int alen,
         }
 
       /* Check if we are really looking at a TXT record */
-      if (rr_class == C_IN && rr_type == T_TXT)
+      if ((rr_class == C_IN || rr_class == C_CHAOS) && rr_type == T_TXT)
         {
           /*
            * There may be multiple substrings in a single TXT record. Each

deps/cares/src/ares_private.h

@@ -50,6 +50,11 @@
 #define STATIC_TESTABLE static
 #endif
 
+/* By using a double cast, we can get rid of the bogus warning of
+ * warning: cast from 'const struct sockaddr *' to 'const struct sockaddr_in6 *' increases required alignment from 1 to 4 [-Wcast-align]
+ */
+#define CARES_INADDR_CAST(type, var) ((type)((void *)var))
+
 #if defined(WIN32) && !defined(WATT32)
 
 #define WIN_NS_9X            "System\\CurrentControlSet\\Services\\VxD\\MSTCP"

deps/cares/src/ares_process.c

@@ -1337,13 +1337,13 @@ static int same_address(struct sockaddr *sa, struct ares_addr *aa)
         {
           case AF_INET:
             addr1 = &aa->addrV4;
-            addr2 = &((struct sockaddr_in *)sa)->sin_addr;
+            addr2 = &(CARES_INADDR_CAST(struct sockaddr_in *, sa))->sin_addr;
             if (memcmp(addr1, addr2, sizeof(aa->addrV4)) == 0)
               return 1; /* match */
             break;
           case AF_INET6:
             addr1 = &aa->addrV6;
-            addr2 = &((struct sockaddr_in6 *)sa)->sin6_addr;
+            addr2 = &(CARES_INADDR_CAST(struct sockaddr_in6 *, sa))->sin6_addr;
             if (memcmp(addr1, addr2, sizeof(aa->addrV6)) == 0)
               return 1; /* match */
             break;