rpc: assign port only if it is unreserved

Current order:
    assign port;
    check for port;
    if reserved {
        port--;
        continue to i;
    }
    bind();

basically, we are assigning port first then checking if it is reserved

Fix:
    get unreserved port;
    assign port;
    bind();

from now, we get unreserved port first and then assign it

Change-Id: I004580c5215e7c9cae3594af6405b20fcd9fa4ad
BUG: 1323659
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Reviewed-on: http://review.gluster.org/13900
Tested-by: Prasanna Kumar Kalever <pkalever@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/rpc/rpc-transport/socket/src/name.c b/rpc/rpc-transport/socket/src/name.c
index a8cf04d8ab7..725a8c18120 100644
--- a/rpc/rpc-transport/socket/src/name.c
+++ b/rpc/rpc-transport/socket/src/name.c
@@ -56,12 +56,14 @@ af_inet_bind_to_port_lt_ceiling (int fd, struct sockaddr *sockaddr,
 
         while (port)
         {
-                _assign_port (sockaddr, port);
                 // ignore the reserved ports
                 if (ports[port] == _gf_true) {
                         port--;
                         continue;
                 }
+
+                _assign_port (sockaddr, port);
+
                 ret = bind (fd, sockaddr, sockaddr_len);
 
                 if (ret == 0)