From 1c26ca61bc35b35c4900a103edee41d138d64b8d Mon Sep 17 00:00:00 2001
From: spacemeowx2 <spacemeowx2@gmail.com>
Date: Fri, 30 Aug 2019 23:12:04 +0800
Subject: [PATCH] fix null ptr crash

---
 src/packet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/packet.c b/src/packet.c
index 3dc4bde..2875de7 100644
--- a/src/packet.c
+++ b/src/packet.c
@@ -86,6 +86,7 @@ void print_packet(const struct pcap_pkthdr *pkthdr, const u_char *packet)
     eprintf("\n\n");
 }
 
+static u_char AnyMac[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 int packet_init(
     struct packet_ctx *self,
     struct lan_play *arg,
@@ -105,6 +106,8 @@ int packet_init(
     CPY_IPV4(self->subnet_net, subnet_net);
     CPY_IPV4(self->subnet_mask, subnet_mask);
 
+    self->mac = AnyMac;
+
     self->identification = 0;
     arp_list_init(self->arp_list);
     self->arp_ttl = arp_ttl;