use an IP macro to make easier to understand the constant ip used

2 files changed, 3 insertions, 1 deletions

diff --git a/tun.c b/tun.c
index 80c1441..f577ee0 100644
--- a/tun.c
+++ b/tun.c
@@ -243,7 +243,7 @@ handle_tun(void)
 		struct iphdr *ip = (struct iphdr *) pkt->data;
 		if (ip->version != IPVERSION)
 			continue;
-		flow = &flows[ip->daddr == htonl(0xc0a87f00)];
+		flow = &flows[ip->daddr == htonl(IP(192,168,127,0))];
 
 		uint64_t curr_time = get_time_us();
 		uint64_t time_to_send;
diff --git a/utils.h b/utils.h
index bc16a6f..62805b4 100644
--- a/utils.h
+++ b/utils.h
@@ -4,6 +4,8 @@
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 #define MIN(a,b) ((a) < (b) ? (a) : (b))
 
+#define IP(a,b,c,d) ((a)*0x1000000u+(b)*0x10000u+(c)*0x100u+(d)*1u)
+
 void set_nonblocking(int sock);
 void set_nodelay(int fd);
 void write_all(int fd, const void *buf, size_t buf_size);