lib/ofp-util: Restore the check for minus sign in port number strings.

Commit 33ab38d9 (meta-flow: Simplify mf_from_ofp_port_string())
inadvertently removed a check for minus sign at the beginning of a
port number string introduced by commit 05dddba (meta-flow: Don't
allow negative port numbers).  This check is still needed, so put it
back, but to ofputil_port_from_string() this time.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>
Reviewed-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>

diff --git a/lib/ofp-util.c b/lib/ofp-util.c
index af2d853..6367e6f 100644 (file)
--- a/lib/ofp-util.c
+++ b/lib/ofp-util.c
@@ -5394,8 +5394,12 @@ ofputil_port_to_ofp11(ofp_port_t ofp10_port)
 bool
 ofputil_port_from_string(const char *s, ofp_port_t *portp)
 {
-    uint32_t port32;
+    unsigned int port32; /* int is at least 32 bits wide. */
 
+    if (*s == '-') {
+        VLOG_WARN("Negative value %s is not a valid port number.", s);
+        return false;
+    }
     *portp = 0;
     if (str_to_uint(s, 10, &port32)) {
         if (port32 < ofp_to_u16(OFPP_MAX)) {