deps: update to c-ares 1.17.1

PR-URL: #36207
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

deps/cares/cares.gyp

@@ -75,6 +75,7 @@
         'src/ares__parse_into_addrinfo.c',
         'src/ares_parse_aaaa_reply.c',
         'src/ares_parse_a_reply.c',
+        'src/ares_parse_caa_reply.c',
         'src/ares_parse_mx_reply.c',
         'src/ares_parse_naptr_reply.c',
         'src/ares_parse_ns_reply.c',

deps/cares/include/ares.h

@@ -528,6 +528,15 @@ struct ares_addr6ttl {
   int             ttl;
 };
 
+struct ares_caa_reply {
+  struct ares_caa_reply  *next;
+  int                     critical;
+  unsigned char          *property;
+  size_t                  plength;  /* plength excludes null termination */
+  unsigned char          *value;
+  size_t                  length;   /* length excludes null termination */
+};
+
 struct ares_srv_reply {
   struct ares_srv_reply  *next;
   char                   *host;
@@ -637,6 +646,10 @@ CARES_EXTERN int ares_parse_aaaa_reply(const unsigned char *abuf,
                                        struct ares_addr6ttl *addrttls,
                                        int *naddrttls);
 
+CARES_EXTERN int ares_parse_caa_reply(const unsigned char* abuf,
+				      int alen,
+				      struct ares_caa_reply** caa_out);
+
 CARES_EXTERN int ares_parse_ptr_reply(const unsigned char *abuf,
                                       int alen,
                                       const void *addr,

deps/cares/include/ares_version.h

@@ -6,12 +6,12 @@
 #define ARES_COPYRIGHT "2004 - 2020 Daniel Stenberg, <daniel@haxx.se>."
 
 #define ARES_VERSION_MAJOR 1
-#define ARES_VERSION_MINOR 16
+#define ARES_VERSION_MINOR 17
 #define ARES_VERSION_PATCH 1
 #define ARES_VERSION ((ARES_VERSION_MAJOR<<16)|\
                        (ARES_VERSION_MINOR<<8)|\
                        (ARES_VERSION_PATCH))
-#define ARES_VERSION_STR "1.16.1"
+#define ARES_VERSION_STR "1.17.1"
 
 #if (ARES_VERSION >= 0x010700)
 #  define CARES_HAVE_ARES_LIBRARY_INIT 1

deps/cares/include/nameser.h

@@ -88,6 +88,7 @@ typedef enum __ns_type {
     ns_t_maila = 254,       /* Transfer mail agent records. */
     ns_t_any = 255,         /* Wildcard match. */
     ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
+    ns_t_caa = 257,         /* Certification Authority Authorization. */
     ns_t_max = 65536
 } ns_type;
 
@@ -204,8 +205,14 @@ typedef enum __ns_rcode {
 #define T_AXFR          ns_t_axfr
 #define T_MAILB         ns_t_mailb
 #define T_MAILA         ns_t_maila
+#define T_CAA           ns_t_caa
 #define T_ANY           ns_t_any
 
 #endif /* HAVE_ARPA_NAMESER_COMPAT_H */
 
+/* Android's bionic arpa/nameser_compat.h, nor glibc versions prior to 2.25 have T_OPT defined */
+#ifndef T_OPT
+#  define T_OPT ns_t_opt
+#endif
+
 #endif /* ARES_NAMESER_H */

deps/cares/src/ares__readaddrinfo.c

@@ -163,6 +163,10 @@ int ares__readaddrinfo(FILE *fp,
           continue;
         }
 
+      /* Zero-out 'addr' struct, as there are members that we may not set, especially
+       * for ipv6.  We don't want garbage data */
+      memset(&addr, 0, sizeof(addr));
+
       /*
        * Convert address string to network address for the requested families.
        * Actual address family possible values are AF_INET and AF_INET6 only.
@@ -179,7 +183,7 @@ int ares__readaddrinfo(FILE *fp,
                 }
 
               node->ai_family = addr.sa.sa_family = AF_INET;
-              node->ai_addrlen = sizeof(sizeof(addr.sa4));
+              node->ai_addrlen = sizeof(addr.sa4);
               node->ai_addr = ares_malloc(sizeof(addr.sa4));
               if (!node->ai_addr)
                 {
@@ -200,7 +204,7 @@ int ares__readaddrinfo(FILE *fp,
                 }
 
               node->ai_family = addr.sa.sa_family = AF_INET6;
-              node->ai_addrlen = sizeof(sizeof(addr.sa6));
+              node->ai_addrlen = sizeof(addr.sa6);
               node->ai_addr = ares_malloc(sizeof(addr.sa6));
               if (!node->ai_addr)
                 {

deps/cares/src/ares__sortaddrinfo.c

@@ -85,11 +85,12 @@ struct addrinfo_sort_elem
 #define ARES_IN6_IS_ADDR_6BONE(a)      \
         (((a)->s6_addr[0] == 0x3f) && ((a)->s6_addr[1] == 0xfe))
 
+
 static int get_scope(const struct sockaddr *addr)
 {
   if (addr->sa_family == AF_INET6)
     {
-      const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+      const struct sockaddr_in6 *addr6 = CARES_INADDR_CAST(const struct sockaddr_in6 *, addr);
       if (IN6_IS_ADDR_MULTICAST(&addr6->sin6_addr))
         {
           return ARES_IPV6_ADDR_MC_SCOPE(&addr6->sin6_addr);
@@ -114,7 +115,7 @@ static int get_scope(const struct sockaddr *addr)
     }
   else if (addr->sa_family == AF_INET)
     {
-      const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+      const struct sockaddr_in *addr4 = CARES_INADDR_CAST(const struct sockaddr_in *, addr);
       unsigned long int na = ntohl(addr4->sin_addr.s_addr);
       if (ARES_IN_LOOPBACK(na) || /* 127.0.0.0/8 */
           (na & 0xffff0000) == 0xa9fe0000) /* 169.254.0.0/16 */
@@ -149,7 +150,7 @@ static int get_label(const struct sockaddr *addr)
     }
   else if (addr->sa_family == AF_INET6)
     {
-      const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+      const struct sockaddr_in6 *addr6 = CARES_INADDR_CAST(const struct sockaddr_in6 *, addr);
       if (IN6_IS_ADDR_LOOPBACK(&addr6->sin6_addr))
         {
           return 0;
@@ -210,7 +211,7 @@ static int get_precedence(const struct sockaddr *addr)
     }
   else if (addr->sa_family == AF_INET6)
     {
-      const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+      const struct sockaddr_in6 *addr6 = CARES_INADDR_CAST(const struct sockaddr_in6 *, addr);
       if (IN6_IS_ADDR_LOOPBACK(&addr6->sin6_addr))
         {
           return 50;
@@ -353,10 +354,10 @@ static int rfc6724_compare(const void *ptr1, const void *ptr2)
     {
       const struct sockaddr_in6 *a1_src = &a1->src_addr.sa6;
       const struct sockaddr_in6 *a1_dst =
-          (const struct sockaddr_in6 *)a1->ai->ai_addr;
+          CARES_INADDR_CAST(const struct sockaddr_in6 *, a1->ai->ai_addr);
       const struct sockaddr_in6 *a2_src = &a2->src_addr.sa6;
       const struct sockaddr_in6 *a2_dst =
-          (const struct sockaddr_in6 *)a2->ai->ai_addr;
+          CARES_INADDR_CAST(const struct sockaddr_in6 *, a2->ai->ai_addr);
       prefixlen1 = common_prefix_len(&a1_src->sin6_addr, &a1_dst->sin6_addr);
       prefixlen2 = common_prefix_len(&a2_src->sin6_addr, &a2_dst->sin6_addr);
       if (prefixlen1 != prefixlen2)
@@ -384,7 +385,7 @@ static int find_src_addr(ares_channel channel,
                          const struct sockaddr *addr,
                          struct sockaddr *src_addr)
 {
-  int sock;
+  ares_socket_t sock;
   int ret;
   ares_socklen_t len;
 
@@ -402,7 +403,7 @@ static int find_src_addr(ares_channel channel,
     }
 
   sock = ares__open_socket(channel, addr->sa_family, SOCK_DGRAM, IPPROTO_UDP);
-  if (sock == -1)
+  if (sock == ARES_SOCKET_BAD)
     {
       if (errno == EAFNOSUPPORT)
         {
@@ -426,7 +427,7 @@ static int find_src_addr(ares_channel channel,
       return 0;
     }
 
-  if (getsockname(sock, src_addr, &len) == -1)
+  if (getsockname(sock, src_addr, &len) != 0)
     {
       ares__close_socket(channel, sock);
       return -1;
@@ -491,4 +492,4 @@ int ares__sortaddrinfo(ares_channel channel, struct ares_addrinfo_node *list_sen
 
   ares_free(elems);
   return ARES_SUCCESS;
-}
+}

deps/cares/src/ares_data.c

@@ -119,6 +119,16 @@ void ares_free_data(void *dataptr)
             ares_free(ptr->data.soa_reply.hostmaster);
           break;
 
+        case ARES_DATATYPE_CAA_REPLY:
+
+          if (ptr->data.caa_reply.next)
+            next_data = ptr->data.caa_reply.next;
+          if (ptr->data.caa_reply.property)
+            ares_free(ptr->data.caa_reply.property);
+          if (ptr->data.caa_reply.value)
+            ares_free(ptr->data.caa_reply.value);
+          break;
+
         default:
           return;
       }
@@ -174,6 +184,14 @@ void *ares_malloc_data(ares_datatype type)
         ptr->data.txt_reply.length = 0;
         break;
 
+      case ARES_DATATYPE_CAA_REPLY:
+        ptr->data.caa_reply.next = NULL;
+        ptr->data.caa_reply.plength = 0;
+        ptr->data.caa_reply.property = NULL;
+        ptr->data.caa_reply.length = 0;
+        ptr->data.caa_reply.value = NULL;
+        break;
+
       case ARES_DATATYPE_ADDR_NODE:
         ptr->data.addr_node.next = NULL;
         ptr->data.addr_node.family = 0;

deps/cares/src/ares_data.h

@@ -30,6 +30,7 @@ typedef enum {
   ARES_DATATYPE_OPTIONS,      /* struct ares_options   */
 #endif
   ARES_DATATYPE_ADDR_PORT_NODE, /* struct ares_addr_port_node - introduced in 1.11.0 */
+  ARES_DATATYPE_CAA_REPLY,    /* struct ares_caa_reply   - introduced in 1.17 */
   ARES_DATATYPE_LAST          /* not used              - introduced in 1.7.0 */
 } ares_datatype;
 
@@ -65,6 +66,7 @@ struct ares_data {
     struct ares_mx_reply     mx_reply;
     struct ares_naptr_reply  naptr_reply;
     struct ares_soa_reply    soa_reply;
+    struct ares_caa_reply    caa_reply;
   } data;
 };
 

deps/cares/src/ares_getaddrinfo.c

@@ -386,6 +386,9 @@ static int fake_addrinfo(const char *name,
         }
     }
 
+  node->ai_socktype = hints->ai_socktype;
+  node->ai_protocol = hints->ai_protocol;
+
   callback(arg, ARES_SUCCESS, 0, ai);
   return 1;
 }
@@ -406,6 +409,8 @@ static void end_hquery(struct host_query *hquery, int status)
       /* Set port into each address (resolved separately). */
       while (next)
         {
+          next->ai_socktype = hquery->hints.ai_socktype;
+          next->ai_protocol = hquery->hints.ai_protocol;
           if (next->ai_family == AF_INET)
             {
               (CARES_INADDR_CAST(struct sockaddr_in *, next->ai_addr))->sin_port = htons(hquery->port);
@@ -754,12 +759,18 @@ static int as_is_first(const struct host_query* hquery)
 {
   char* p;
   int ndots = 0;
+  size_t nname = strlen(hquery->name);
   for (p = hquery->name; *p; p++)
     {
       if (*p == '.')
         {
           ndots++;
         }
     }
+  if (nname && hquery->name[nname-1] == '.')
+    {
+      /* prevent ARES_EBADNAME for valid FQDN, where ndots < channel->ndots  */
+      return 1;
+    }
   return ndots >= hquery->channel->ndots;
 }

deps/cares/src/ares_gethostbyaddr.c

@@ -208,7 +208,6 @@ static int file_lookup(struct ares_addr *addr, struct hostent **host)
   strcat(PATH_HOSTS, WIN_PATH_HOSTS);
 
 #elif defined(WATT32)
-  extern const char *_w32_GetHostsFile (void);
   const char *PATH_HOSTS = _w32_GetHostsFile();
 
   if (!PATH_HOSTS)

deps/cares/src/ares_gethostbyname.c

@@ -258,7 +258,7 @@ static int fake_hostent(const char *name, int family,
   struct in_addr in;
   struct ares_in6_addr in6;
 
-  if (family == AF_INET || family == AF_INET6)
+  if (family == AF_INET || family == AF_UNSPEC)
     {
       /* It only looks like an IP address if it's all numbers and dots. */
       int numdots = 0, valid = 1;
@@ -276,13 +276,17 @@ static int fake_hostent(const char *name, int family,
       /* if we don't have 3 dots, it is illegal
        * (although inet_pton doesn't think so).
        */
-      if (numdots != 3 || !valid)
+      if (numdots != 3 || !valid) {
         result = 0;
-      else
+      } else {
         result = (ares_inet_pton(AF_INET, name, &in) < 1 ? 0 : 1);
+      }
 
-      if (result)
-        family = AF_INET;
+      /*
+       * Set address family in case of failure,
+       * as we will try to convert it later afterwards
+       */
+      family = result ? AF_INET : AF_INET6;
     }
   if (family == AF_INET6)
     result = (ares_inet_pton(AF_INET6, name, &in6) < 1 ? 0 : 1);
@@ -383,7 +387,6 @@ static int file_lookup(const char *name, int family, struct hostent **host)
   strcat(PATH_HOSTS, WIN_PATH_HOSTS);
 
 #elif defined(WATT32)
-  extern const char *_w32_GetHostsFile (void);
   const char *PATH_HOSTS = _w32_GetHostsFile();
 
   if (!PATH_HOSTS)

deps/cares/src/ares_init.c

@@ -115,20 +115,6 @@ int ares_init_options(ares_channel *channelptr, struct ares_options *options,
   int status = ARES_SUCCESS;
   struct timeval now;
 
-#ifdef CURLDEBUG
-  const char *env = getenv("CARES_MEMDEBUG");
-
-  if (env)
-    curl_memdebug(env);
-  env = getenv("CARES_MEMLIMIT");
-  if (env) {
-    char *endptr;
-    long num = strtol(env, &endptr, 10);
-    if((endptr != env) && (endptr == env + strlen(env)) && (num > 0))
-      curl_memlimit(num);
-  }
-#endif
-
   if (ares_library_initialized() != ARES_SUCCESS)
     return ARES_ENOTINITIALIZED;  /* LCOV_EXCL_LINE: n/a on non-WinSock */
 
@@ -1611,7 +1597,8 @@ static int init_by_resolv_conf(ares_channel channel)
     if (channel->nservers == -1) {
       union res_sockaddr_union addr[MAXNS];
       int nscount = res_getservers(&res, addr, MAXNS);
-      for (int i = 0; i < nscount; ++i) {
+      int i;
+      for (i = 0; i < nscount; ++i) {
         char str[INET6_ADDRSTRLEN];
         int config_status;
         sa_family_t family = addr[i].sin.sin_family;
@@ -1639,8 +1626,9 @@ static int init_by_resolv_conf(ares_channel channel)
       if (!channel->domains) {
         status = ARES_ENOMEM;
       } else {
+        int i;
         channel->ndomains = entries;
-        for (int i = 0; i < channel->ndomains; ++i) {
+        for (i = 0; i < channel->ndomains; ++i) {
           channel->domains[i] = ares_strdup(res.dnsrch[i]);
           if (!channel->domains[i])
             status = ARES_ENOMEM;