Curl_addrinfo?_callback() and addrinfo_callback() now returns

CURLE_OK or CURLE_OUT_OF_MEMORY.
Add typecast in hostares.c.

lib/hostares.c

@@ -291,7 +291,7 @@ Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
 
     /* areschannel is already setup in the Curl_open() function */
     ares_gethostbyname(data->state.areschannel, hostname, PF_INET,
-                       Curl_addrinfo4_callback, conn);
+                       (ares_callback)Curl_addrinfo4_callback, conn);
 
     *waitp = TRUE; /* please wait for the response */
   }

lib/hostasyn.c

@@ -108,12 +108,13 @@
  *
  * The storage operation locks and unlocks the DNS cache.
  */
-static void addrinfo_callback(void *arg, /* "struct connectdata *" */
-                              int status,
-                              void *addr)
+static CURLcode addrinfo_callback(void *arg, /* "struct connectdata *" */
+                                  int status,
+                                  void *addr)
 {
   struct connectdata *conn = (struct connectdata *)arg;
   struct Curl_dns_entry *dns = NULL;
+  CURLcode rc = CURLE_OK;
 
   conn->async.status = status;
 
@@ -135,13 +136,17 @@ static void addrinfo_callback(void *arg, /* "struct connectdata *" */
       dns = Curl_cache_addr(data, ai,
                             conn->async.hostname,
                             conn->async.port);
-      if(!dns)
+      if(!dns) {
         /* failed to store, cleanup and return error */
         Curl_freeaddrinfo(ai);
+        rc = CURLE_OUT_OF_MEMORY;
+      }
 
       if(data->share)
         Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
     }
+    else
+      rc = CURLE_OUT_OF_MEMORY;
   }
 
   conn->async.dns = dns;
@@ -153,21 +158,22 @@ static void addrinfo_callback(void *arg, /* "struct connectdata *" */
 
   /* ipv4: The input hostent struct will be freed by ares when we return from
      this function */
+  return rc;
 }
 
-void Curl_addrinfo4_callback(void *arg, /* "struct connectdata *" */
-                             int status,
-                             struct hostent *hostent)
+CURLcode Curl_addrinfo4_callback(void *arg, /* "struct connectdata *" */
+                                 int status,
+                                 struct hostent *hostent)
 {
-  addrinfo_callback(arg, status, hostent);
+  return addrinfo_callback(arg, status, hostent);
 }
 
 #ifdef CURLRES_IPV6
-void Curl_addrinfo6_callback(void *arg, /* "struct connectdata *" */
-                             int status,
-                             struct addrinfo *ai)
+CURLcode Curl_addrinfo6_callback(void *arg, /* "struct connectdata *" */
+                                 int status,
+                                 struct addrinfo *ai)
 {
-  addrinfo_callback(arg, status, ai);
+  return addrinfo_callback(arg, status, ai);
 }
 #endif
 

lib/hostip.h

@@ -199,14 +199,14 @@ int curl_dogetnameinfo(const struct sockaddr *sa, socklen_t salen,
 
 /* This is the callback function that is used when we build with asynch
    resolve, ipv4 */
-void Curl_addrinfo4_callback(void *arg,
-                            int status,
-                            struct hostent *hostent);
+CURLcode Curl_addrinfo4_callback(void *arg,
+                                 int status,
+                                 struct hostent *hostent);
 /* This is the callback function that is used when we build with asynch
    resolve, ipv6 */
-void Curl_addrinfo6_callback(void *arg,
-                            int status,
-                            struct addrinfo *ai);
+CURLcode Curl_addrinfo6_callback(void *arg,
+                                 int status,
+                                 struct addrinfo *ai);
 
 
 /* [ipv4 only] Creates a Curl_addrinfo struct from a numerical-only IP

lib/hostthre.c

@@ -190,7 +190,7 @@ static unsigned __stdcall gethostbyname_thread (void *arg)
                        curr_proc, &mutex_waiting, 0, FALSE,
                        DUPLICATE_SAME_ACCESS)) {
     /* failed to duplicate the mutex, no point in continuing */
-    return 0;
+    return -1;
   }
 
   /* Sharing the same _iob[] element with our parent thread should
@@ -214,12 +214,10 @@ static unsigned __stdcall gethostbyname_thread (void *arg)
     SetEvent(td->event_resolved);
 
     if (he) {
-      Curl_addrinfo4_callback(conn, CURL_ASYNC_SUCCESS, he);
-      rc = 1;
+      rc = Curl_addrinfo4_callback(conn, CURL_ASYNC_SUCCESS, he);
     }
     else {
-      Curl_addrinfo4_callback(conn, (int)WSAGetLastError(), NULL);
-      rc = 0;
+      rc = Curl_addrinfo4_callback(conn, (int)WSAGetLastError(), NULL);
     }
     TRACE(("Winsock-error %d, addr %s\n", conn->async.status,
            he ? inet_ntoa(*(struct in_addr*)he->h_addr) : "unknown"));
@@ -260,7 +258,7 @@ static unsigned __stdcall getaddrinfo_thread (void *arg)
                        curr_proc, &mutex_waiting, 0, FALSE,
                        DUPLICATE_SAME_ACCESS)) {
     /* failed to duplicate the mutex, no point in continuing */
-    return 0;
+    return -1;
   }
 
 #ifndef _WIN32_WCE
@@ -286,10 +284,10 @@ static unsigned __stdcall getaddrinfo_thread (void *arg)
 #ifdef DEBUG_THREADING_GETADDRINFO
       dump_addrinfo (conn, res);
 #endif
-      Curl_addrinfo6_callback(conn, CURL_ASYNC_SUCCESS, res);
+      rc = Curl_addrinfo6_callback(conn, CURL_ASYNC_SUCCESS, res);
     }
     else {
-      Curl_addrinfo6_callback(conn, (int)WSAGetLastError(), NULL);
+      rc = Curl_addrinfo6_callback(conn, (int)WSAGetLastError(), NULL);
       TRACE(("Winsock-error %d, no address\n", conn->async.status));
     }
   }
@@ -493,7 +491,11 @@ CURLcode Curl_wait_for_resolv(struct connectdata *conn,
 
   if (!conn->async.dns) {
     /* a name was not resolved */
-    if (td->thread_status == (DWORD)-1 || conn->async.status == NO_DATA) {
+    if (td->thread_status == CURLE_OUT_OF_MEMORY) {
+      rc = CURLE_OUT_OF_MEMORY;
+      failf(data, "Could not resolve host: %s", curl_easy_strerror(rc));
+    }
+    else if (td->thread_status == (DWORD)-1 || conn->async.status == NO_DATA) {
       failf(data, "Resolving host timed out: %s", conn->host.name);
       rc = CURLE_OPERATION_TIMEDOUT;
     }
@@ -508,10 +510,8 @@ CURLcode Curl_wait_for_resolv(struct connectdata *conn,
 
   destroy_thread_data(&conn->async);
 
-  if(CURLE_OK != rc)
-    /* close the connection, since we must not return failure from here
-       without cleaning up this connection properly */
-    Curl_disconnect(conn);
+  if(!conn->async.dns)
+    conn->bits.close = TRUE;
 
   return (rc);
 }