Made defines instead of plain numbers for the Curl_resolv() return code to

make the code easier to read

lib/connect.c

@@ -263,7 +263,7 @@ static CURLcode bindlocal(struct connectdata *conn,
        * We now have the numerical IPv4-style x.y.z.w in the 'myhost' buffer
        */
       rc = Curl_resolv(conn, myhost, 0, &h);
-      if(rc == 1)
+      if(rc == CURLRESOLV_PENDING)
         (void)Curl_wait_for_resolv(conn, &h);
 
       if(h)
@@ -276,7 +276,7 @@ static CURLcode bindlocal(struct connectdata *conn,
        * or IP number
        */
       rc = Curl_resolv(conn, data->set.device, 0, &h);
-      if(rc == 1)
+      if(rc == CURLRESOLV_PENDING)
         (void)Curl_wait_for_resolv(conn, &h);
 
       if(h)

lib/ftp.c

@@ -1367,14 +1367,14 @@ CURLcode ftp_use_port(struct connectdata *conn)
     if((in == CURL_INADDR_NONE) &&
        Curl_if2ip(data->set.ftpport, myhost, sizeof(myhost))) {
       rc = Curl_resolv(conn, myhost, 0, &h);
-      if(rc == 1)
+      if(rc == CURLRESOLV_PENDING)
         rc = Curl_wait_for_resolv(conn, &h);
     }
     else {
       size_t len = strlen(data->set.ftpport);
       if(len>1) {
         rc = Curl_resolv(conn, data->set.ftpport, 0, &h);
-        if(rc == 1)
+        if(rc == CURLRESOLV_PENDING)
           rc = Curl_wait_for_resolv(conn, &h);
       }
       if(h)
@@ -1642,7 +1642,7 @@ CURLcode ftp_use_pasv(struct connectdata *conn,
      * now, instead we remake the lookup here and now!
      */
     rc = Curl_resolv(conn, conn->proxyhost, conn->port, &addr);
-    if(rc == 1)
+    if(rc == CURLRESOLV_PENDING)
       rc = Curl_wait_for_resolv(conn, &addr);
 
     connectport =
@@ -1652,7 +1652,7 @@ CURLcode ftp_use_pasv(struct connectdata *conn,
   else {
     /* normal, direct, ftp connection */
     rc = Curl_resolv(conn, newhostp, newport, &addr);
-    if(rc == 1)
+    if(rc == CURLRESOLV_PENDING)
       rc = Curl_wait_for_resolv(conn, &addr);
 
     if(!addr) {

lib/hostip.c

@@ -366,10 +366,11 @@ Curl_cache_addr(struct SessionHandle *data,
  *
  * Return codes:
  *
- * -1 = error, no pointer
- * 0 = OK, pointer provided
- * 1 = waiting for response, no pointer
+ * CURLRESOLV_ERROR   (-1) = error, no pointer
+ * CURLRESOLV_RESOLVED (0) = OK, pointer provided
+ * CURLRESOLV_PENDING  (1) = waiting for response, no pointer
  */
+
 int Curl_resolv(struct connectdata *conn,
                 char *hostname,
                 int port,
@@ -383,7 +384,7 @@ int Curl_resolv(struct connectdata *conn,
   CURLcode result;
 
   /* default to failure */
-  int rc = -1;
+  int rc = CURLRESOLV_ERROR;
   *entry = NULL;
 
 #ifdef HAVE_SIGSETJMP
@@ -392,7 +393,7 @@ int Curl_resolv(struct connectdata *conn,
   if(!data->set.no_signal && sigsetjmp(curl_jmpenv, 1)) {
     /* this is coming from a siglongjmp() */
     failf(data, "name lookup timed out");
-    return -1;
+    return CURLRESOLV_ERROR;
   }
 #endif
 
@@ -400,7 +401,7 @@ int Curl_resolv(struct connectdata *conn,
   entry_id = create_hostcache_id(hostname, port, &entry_len);
   /* If we can't create the entry id, fail */
   if (!entry_id)
-    return -1;
+    return CURLRESOLV_ERROR;
 
   if(data->share)
     Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
@@ -422,7 +423,7 @@ int Curl_resolv(struct connectdata *conn,
     /* Check what IP specifics the app has requested and if we can provide it.
      * If not, bail out. */
     if(!Curl_ipvalid(data))
-      return -1;
+      return CURLRESOLV_ERROR;
 
     /* If Curl_getaddrinfo() returns NULL, 'wait' might be set to a non-zero
        value indicating that we need to wait for the response to the resolve
@@ -436,11 +437,11 @@ int Curl_resolv(struct connectdata *conn,
         /* First, check that we haven't received the info by now */
         result = Curl_is_resolved(conn, &dns);
         if(result) /* error detected */
-          return -1;
+          return CURLRESOLV_ERROR;
         if(dns)
-          rc = 0; /* pointer provided */
+          rc = CURLRESOLV_RESOLVED; /* pointer provided */
         else
-          rc = 1; /* no info yet */
+          rc = CURLRESOLV_PENDING; /* no info yet */
       }
     }
     else {
@@ -457,12 +458,12 @@ int Curl_resolv(struct connectdata *conn,
         /* returned failure, bail out nicely */
         Curl_freeaddrinfo(addr);
       else
-        rc = 0;
+        rc = CURLRESOLV_RESOLVED;
     }
   }
   else {
     dns->inuse++; /* we use it! */
-    rc = 0;
+    rc = CURLRESOLV_RESOLVED;
   }
 
   *entry = dns;

lib/hostip.h

@@ -51,10 +51,12 @@ struct Curl_dns_entry {
  * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
  * use, or we'll leak memory!
  */
-int Curl_resolv(struct connectdata *conn,
-                char *hostname,
-                int port,
-                struct Curl_dns_entry **dnsentry);
+/* return codes */
+#define CURLRESOLV_ERROR    -1
+#define CURLRESOLV_RESOLVED  0
+#define CURLRESOLV_PENDING   1
+int Curl_resolv(struct connectdata *conn, char *hostname,
+                int port, struct Curl_dns_entry **dnsentry);
 
 /*
  * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
@@ -201,6 +203,10 @@ Curl_cache_addr(struct SessionHandle *data, Curl_addrinfo *addr,
 #define CURLRES_SYNCH
 #endif
 
+#ifndef USE_LIBIDN
+#define CURLRES_IDN
+#endif
+
 /* Allocate enough memory to hold the full name information structs and
  * everything. OSF1 is known to require at least 8872 bytes. The buffer
  * required for storing all possible aliases and IP numbers is according to

lib/url.c

@@ -1765,10 +1765,10 @@ static int handleSock5Proxy(const char *proxy_name,
     Curl_addrinfo *hp=NULL;
     int rc = Curl_resolv(conn, TRUE_HOSTNAME(conn), conn->remote_port, &dns);
     
-    if(rc == -1)
+    if(rc == CURLRESOLV_ERROR)
       return 1;
 
-    if(rc == 1)
+    if(rc == CURLRESOLV_PENDING)
       /* this requires that we're in "wait for resolve" state */
       rc = Curl_wait_for_resolv(conn, &dns);
     
@@ -3062,7 +3062,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
 
     /* Resolve target host right on */
     rc = Curl_resolv(conn, TRUE_HOSTNAME(conn), conn->port, &hostaddr);
-    if(rc == 1)
+    if(rc == CURLRESOLV_PENDING)
       *async = TRUE;
 
     else if(!hostaddr) {
@@ -3077,7 +3077,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
     /* resolve proxy */
     rc = Curl_resolv(conn, conn->proxyhost, conn->port, &hostaddr);
 
-    if(rc == 1)
+    if(rc == CURLRESOLV_PENDING)
       *async = TRUE;
 
     else if(!hostaddr) {