File fix-return-status-in-Curl_is_connected.patch of Package curl.openSUSE_Leap_42.3_Update

Index: curl-7.37.0/lib/connect.c
===================================================================
--- curl-7.37.0.orig/lib/connect.c
+++ curl-7.37.0/lib/connect.c
@@ -716,11 +716,11 @@ CURLcode Curl_is_connected(struct connec
                            bool *connected)
 {
   struct SessionHandle *data = conn->data;
-  CURLcode code = CURLE_OK;
+  CURLcode result = CURLE_OK;
   long allow;
   int error = 0;
   struct timeval now;
-  int result;
+  int rc;
   int i;
 
   DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
@@ -745,6 +745,7 @@ CURLcode Curl_is_connected(struct connec
   }
 
   for(i=0; i<2; i++) {
+    const int other = i ^ 1;
     if(conn->tempsock[i] == CURL_SOCKET_BAD)
       continue;
 
@@ -756,9 +757,9 @@ CURLcode Curl_is_connected(struct connec
 #endif
 
     /* check socket for connect */
-    result = Curl_socket_ready(CURL_SOCKET_BAD, conn->tempsock[i], 0);
+    rc = Curl_socket_ready(CURL_SOCKET_BAD, conn->tempsock[i], 0);
 
-    if(result == 0) { /* no connection yet */
+    if(rc == 0) { /* no connection yet */
       if(curlx_tvdiff(now, conn->connecttime) >= conn->timeoutms_per_addr) {
         infof(data, "After %ldms connect time, move on!\n",
               conn->timeoutms_per_addr);
@@ -771,10 +772,9 @@ CURLcode Curl_is_connected(struct connec
         trynextip(conn, sockindex, 1);
       }
     }
-    else if(result == CURL_CSELECT_OUT) {
+    else if(rc == CURL_CSELECT_OUT) {
       if(verifyconnect(conn->tempsock[i], &error)) {
         /* we are connected with TCP, awesome! */
-        int other = i ^ 1;
 
         /* use this socket from now on */
         conn->sock[sockindex] = conn->tempsock[i];
@@ -788,9 +788,9 @@ CURLcode Curl_is_connected(struct connec
         }
 
         /* see if we need to do any proxy magic first once we connected */
-        code = Curl_connected_proxy(conn, sockindex);
-        if(code)
-          return code;
+        result = Curl_connected_proxy(conn, sockindex);
+        if(result)
+          return result;
 
         conn->bits.tcpconnect[sockindex] = TRUE;
 
@@ -805,7 +805,7 @@ CURLcode Curl_is_connected(struct connec
       else
         infof(data, "Connection failed\n");
     }
-    else if(result & CURL_CSELECT_ERR)
+    else if(rc & CURL_CSELECT_ERR)
       (void)verifyconnect(conn->tempsock[i], &error);
 
     /*
@@ -817,6 +817,7 @@ CURLcode Curl_is_connected(struct connec
       data->state.os_errno = error;
       SET_SOCKERRNO(error);
       if(conn->tempaddr[i]) {
+        CURLcode status;
         Curl_printable_address(conn->tempaddr[i], ipaddress, MAX_IPADR_LEN);
         infof(data, "connect to %s port %ld failed: %s\n",
               ipaddress, conn->port, Curl_strerror(conn, error));
@@ -824,12 +825,16 @@ CURLcode Curl_is_connected(struct connec
         conn->timeoutms_per_addr = conn->tempaddr[i]->ai_next == NULL ?
                                    allow : allow / 2;
 
-        code = trynextip(conn, sockindex, i);
+        status = trynextip(conn, sockindex, i);
+        if(status != CURLE_COULDNT_CONNECT
+            || conn->tempsock[other] == CURL_SOCKET_BAD)
+          /* the last attempt failed and no other sockets remain open */
+          result = status;
       }
     }
   }
 
-  if(code) {
+  if(result) {
     /* no more addresses to try */
 
     /* if the first address family runs out of addresses to try before
@@ -846,7 +851,7 @@ CURLcode Curl_is_connected(struct connec
           conn->port, Curl_strerror(conn, error));
   }
 
-  return code;
+  return result;
 }
 
 static void tcpnodelay(struct connectdata *conn,