diff --git a/srcs/service/dhcpd/dhcpd_network.c b/srcs/service/dhcpd/dhcpd_network.c
index e6f7c61..a13ac26 100644
--- a/srcs/service/dhcpd/dhcpd_network.c
+++ b/srcs/service/dhcpd/dhcpd_network.c
@@ -227,7 +227,7 @@ static PACKET_MMAP_RING g_pkgRing;
 static NIC_INFO         g_nicInfo;
 static uv_udp_t         g_uvRawSockReq;
 
-U32 pkg_mmap_tx(U8 *pData, U32 nBytes) {
+void *get_pkg_memory() {
     int                  i;
     ssize_t              ret;
     struct tpacket3_hdr *hdr;
@@ -237,24 +237,28 @@ U32 pkg_mmap_tx(U8 *pData, U32 nBytes) {
         g_pkgRing.index = (g_pkgRing.index + 1) % g_pkgRing.send.tp_frame_nr;
 
         if (!(hdr->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING))) {
-            U8 *p = (U8 *)hdr + TPACKET3_HDRLEN - sizeof(struct sockaddr_ll);
-            memcpy(p, pData, nBytes);
-            hdr->tp_next_offset = 0;
-            hdr->tp_len         = nBytes;
-            hdr->tp_snaplen     = nBytes;
-            hdr->tp_status      = TP_STATUS_SEND_REQUEST;
-            return hdr->tp_len;
+            return (U8 *)hdr + TPACKET3_HDRLEN - sizeof(struct sockaddr_ll);
         }
     }
 
-    return 0;
+    return NULL;
+}
+
+U32 pkg_mmap_tx(U8 *pData, U32 nBytes) {
+    struct tpacket3_hdr *hdr = (struct tpacket3_hdr *)(pData + sizeof(struct sockaddr_ll) - TPACKET3_HDRLEN);
+
+    hdr->tp_next_offset = 0;
+    hdr->tp_len         = nBytes;
+    hdr->tp_snaplen     = nBytes;
+    hdr->tp_status      = TP_STATUS_SEND_REQUEST;
+    return hdr->tp_len;
 }
 
 static int dhcp_resp_offer(PDHCP_PACKAGE pReq, PIPPOOL_INFO pIpInfo, U32 ip) {
+    U8           *pOpt;
     U16           csum;
     int           tolSize;
-    PDHCP_PACKAGE pRsp = (PDHCP_PACKAGE)malloc(MAX_DHCP_PKG_SIZE);
-    U8           *pOpt = pRsp->dhcp.options;
+    PDHCP_PACKAGE pRsp = get_pkg_memory();
 
     if (pRsp == NULL) {
         LOG_MOD(error, ZLOG_MOD_DHCPD, "Malloc memory error: %u\n", MAX_DHCP_PKG_SIZE);
@@ -319,6 +323,8 @@ static int dhcp_resp_offer(PDHCP_PACKAGE pReq, PIPPOOL_INFO pIpInfo, U32 ip) {
     pRsp->dhcp.giaddr = 0;
 
     // DHCP Options
+    pOpt = pRsp->dhcp.options;
+
     // DHCP 消息类型
     pOpt += dhcp_add_u8_option(pOpt, OPT_MESSAGETYPE, DHCP_MSG_OFFER);
     // 子网掩码