diff --git a/dhcp_tools/uv_rawsocket.c b/dhcp_tools/uv_rawsocket.c
index d370ac6..3daf6fa 100644
--- a/dhcp_tools/uv_rawsocket.c
+++ b/dhcp_tools/uv_rawsocket.c
@@ -30,7 +30,7 @@ static PDHCP_PROTO fill_dhcp_pkg(U8 *pRsp, PDHCP_INFO pInfo) {
 
     if (pInfo->vni == 0) {
         pIp           = (struct iphdr *)(pRsp + IP_HDR_OFFSET);
-        pUdp          = (struct udphdr *)(UDP_HDR_OFFSET);
+        pUdp          = (struct udphdr *)(pRsp + UDP_HDR_OFFSET);
         pDhcp         = (PDHCP_PROTO)((U8 *)pRsp + DHCP_OFFSET);
         pEth->h_proto = htons(ETH_P_IP);
     } else if (pInfo->vni >= 1 && pInfo->vni <= 4095) {
@@ -100,7 +100,7 @@ static U32 dhcp_pkk_checksum(U8 *pRsp, U32 optSize) {
     switch (get_package_vlan_type(pRsp)) {
         default:
             pIp     = (struct iphdr *)(pRsp + IP_HDR_OFFSET);
-            pUdp    = (struct udphdr *)(UDP_HDR_OFFSET);
+            pUdp    = (struct udphdr *)(pRsp + UDP_HDR_OFFSET);
             // 计算包总长度
             tolSize = optSize + sizeof(DHCP_PROTO) + DHCP_OFFSET;
             break;
@@ -309,7 +309,7 @@ int dhcp_tools_init_network(const char *pNicName) {
         return ERR_SUCCESS;
     }
 
-    init_filter("vlan or (udp and dst port 68)");
+    init_filter(" (udp and dst port 68)  or vlan");
 
     ret = create_udp_raw_socket(g_pNicName);
     if (ret != ERR_SUCCESS) {