From 837016a41767c2d980bc93b28debf864aff1adce Mon Sep 17 00:00:00 2001
From: Pengfei Ni <feiskyer@gmail.com>
Date: Thu, 19 May 2016 15:47:59 +0800
Subject: [PATCH] Compare string by strncmp

---
 src/portmapping.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/portmapping.c b/src/portmapping.c
index 071b926..c3aa505 100644
--- a/src/portmapping.c
+++ b/src/portmapping.c
@@ -45,7 +45,9 @@ int hyper_setup_iptables_rule(struct ipt_rule rule)
 
 	if (check == 0) {
 		// iptables rule already exist, do not insert it again
-		if (rule.op == "-A" || rule.op == "-I" || rule.op == "-N") {
+		if (!strncmp(rule.op, "-A", strlen("-A")) ||
+			!strncmp(rule.op, "-I", strlen("-I")) ||
+			!strncmp(rule.op, "-N", strlen("-N"))) {
 			fprintf(stdout, "iptables rule '%s' already exist\n", rule.rule);
 			return 0;
 		}