remote_port: allow connect to port 0

Port number zero is perfectly allowed to connect to. I moved to storing
the remote port number in an int so that -1 means undefined and 0-65535
can be used for legitimate port numbers.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/url.c b/lib/url.c
index 4d7508eee..7a7c2781d 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -3553,6 +3553,7 @@ static struct connectdata *allocate_conn(struct SessionHandle *data)
   conn->tempsock[1] = CURL_SOCKET_BAD; /* no file descriptor */
   conn->connection_id = -1;    /* no ID */
   conn->port = -1; /* unknown at this point */
+  conn->remote_port = -1; /* unknown */
 
   /* Default protocol-independent behavior doesn't support persistent
      connections, so we set this to force-close. Protocols that support
@@ -4075,7 +4076,7 @@ static CURLcode setup_connection_internals(struct connectdata *conn)
 
   /* only if remote_port was not already parsed off the URL we use the
      default port number */
-  if(!conn->remote_port)
+  if(conn->remote_port < 0)
     conn->remote_port = (unsigned short)conn->given->defport;
 
   return CURLE_OK;