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OCT 1. 备份代码，支持在vlan上接收DHCP数据包

This commit is contained in:
huangxin 2023-03-20 15:59:13 +08:00
parent 325c51d940
commit 1190d115b7
1 changed files with 92 additions and 33 deletions
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87
srcs/service/dhcpd/dhcpd_network.c
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@ -97,13 +97,74 @@ static struct sock_filter g_filterCode[] = {
{0x6, 0, 0, 0x00040000},
{0x6, 0, 0, 0x00000000},
#endif
// create by: tcpdump "vlan" -dd
// create by: tcpdump "vlan and udp and port 67 and port 68" -dd
{0x0, 0, 0, 0x00000000},
{0x2, 0, 0, 0x00000000},
{0x2, 0, 0, 0x00000001},
{0x30, 0, 0, 0xfffff030},
{0x15, 4, 0, 0x00000001},
{0x15, 7, 0, 0x00000001},
{0x0, 0, 0, 0x00000004},
{0x2, 0, 0, 0x00000000},
{0x2, 0, 0, 0x00000001},
{0x28, 0, 0, 0x0000000c},
{0x15, 2, 0, 0x00008100},
{0x15, 1, 0, 0x000088a8},
{0x15, 0, 1, 0x00009100},
{0x15, 0, 56, 0x00009100},
{0x61, 0, 0, 0x00000001},
{0x48, 0, 0, 0x0000000c},
{0x15, 0, 13, 0x000086dd},
{0x61, 0, 0, 0x00000000},
{0x50, 0, 0, 0x00000014},
{0x15, 0, 50, 0x00000011},
{0x61, 0, 0, 0x00000000},
{0x48, 0, 0, 0x00000036},
{0x15, 0, 3, 0x00000043},
{0x61, 0, 0, 0x00000000},
{0x48, 0, 0, 0x00000038},
{0x15, 43, 44, 0x00000044},
{0x15, 0, 43, 0x00000044},
{0x61, 0, 0, 0x00000000},
{0x48, 0, 0, 0x00000038},
{0x15, 39, 40, 0x00000043},
{0x15, 0, 39, 0x00000800},
{0x61, 0, 0, 0x00000000},
{0x50, 0, 0, 0x00000017},
{0x15, 0, 36, 0x00000011},
{0x61, 0, 0, 0x00000000},
{0x48, 0, 0, 0x00000014},
{0x45, 33, 0, 0x00001fff},
{0x61, 0, 0, 0x00000000},
{0x50, 0, 0, 0x0000000e},
{0x54, 0, 0, 0x0000000f},
{0x64, 0, 0, 0x00000002},
{0xc, 0, 0, 0x00000000},
{0x7, 0, 0, 0x00000000},
{0x48, 0, 0, 0x0000000e},
{0x15, 0, 8, 0x00000043},
{0x61, 0, 0, 0x00000000},
{0x50, 0, 0, 0x0000000e},
{0x54, 0, 0, 0x0000000f},
{0x64, 0, 0, 0x00000002},
{0xc, 0, 0, 0x00000000},
{0x7, 0, 0, 0x00000000},
{0x48, 0, 0, 0x00000010},
{0x15, 16, 17, 0x00000044},
{0x61, 0, 0, 0x00000000},
{0x50, 0, 0, 0x0000000e},
{0x54, 0, 0, 0x0000000f},
{0x64, 0, 0, 0x00000002},
{0xc, 0, 0, 0x00000000},
{0x7, 0, 0, 0x00000000},
{0x48, 0, 0, 0x0000000e},
{0x15, 0, 9, 0x00000044},
{0x61, 0, 0, 0x00000000},
{0x50, 0, 0, 0x0000000e},
{0x54, 0, 0, 0x0000000f},
{0x64, 0, 0, 0x00000002},
{0xc, 0, 0, 0x00000000},
{0x7, 0, 0, 0x00000000},
{0x48, 0, 0, 0x00000010},
{0x15, 0, 1, 0x00000043},
{0x6, 0, 0, 0x00040000},
{0x6, 0, 0, 0x00000000},
};
@ -120,6 +181,7 @@ static void on_sock_recv(uv_work_t *req) {
PDHCP_PACKAGE pkg = (PDHCP_PACKAGE)pWork->pPkgBase;
//LOG_MSG_HEX(debug, pkg, pWork->nSize);
LOG_MSG(info, "xid: 0x%08X\n", ntohl(pkg->dhcp.xid));
#if 0
LOG_MOD(info, ZLOG_MOD_OPENDHCPD, "vlan = %u\n", VXLAN_VIN_ID_PACK(pkg->vlan_hdr.vlan.id));
LOG_MSG(info, "xid: 0x%08X\n", ntohl(pkg->dhcp.xid));
@ -147,8 +209,8 @@ static void after_msg_recv(uv_work_t *req, int status) {
PPKG_MSG pMsg = (PPKG_MSG)pInfo->pData;
pMsg->nf -= 1;
if (pMsg->nf <= 0) {
LOG_MOD(debug, ZLOG_MOD_OPENDHCPD, "Free all resources: %p\n", pMsg);
if (pMsg->nf == 0) {
LOG_MOD(trace, ZLOG_MOD_OPENDHCPD, "---Free resources: %p\n", pMsg);
free(pMsg->pPkgInfo);
free(pMsg);
}
@ -160,14 +222,10 @@ void raw_sock_recv_cb(uv_poll_t *handle, int status, int events) {
if (status >= 0) {
struct block_desc *pbd = (struct block_desc *)g_pkgRing.rd[block_num].iov_base;
if ((pbd->h1.block_status & TP_STATUS_USER) != 0) {
if ((pbd->h1.block_status & TP_STATUS_USER) && (pbd->h1.num_pkts > 0)) {
int i;
unsigned int num_pkts = pbd->h1.num_pkts;
struct tpacket3_hdr *ppd;
uv_loop_t *pLoop = get_task_manager();
if (num_pkts > 0) {
unsigned int memSize = sizeof(PKG_PROCESS_INFO) * num_pkts;
unsigned int memSize = sizeof(PKG_PROCESS_INFO) * pbd->h1.num_pkts;
PPKG_MSG pMsg = (PPKG_MSG)malloc(sizeof(PKG_MSG));
if (pMsg == NULL) {
@ -175,6 +233,8 @@ void raw_sock_recv_cb(uv_poll_t *handle, int status, int events) {
return;
}
LOG_MOD(trace, ZLOG_MOD_OPENDHCPD, "++++Malloc resources: %p\n", pMsg);
memset(pMsg, 0, sizeof(PKG_MSG));
pMsg->pPkgInfo = (PPKG_PROCESS_INFO)malloc(memSize);
@ -186,9 +246,9 @@ void raw_sock_recv_cb(uv_poll_t *handle, int status, int events) {
memset(pMsg->pPkgInfo, 0, memSize);
pMsg->nf = num_pkts;
pMsg->nf = pbd->h1.num_pkts;
ppd = (struct tpacket3_hdr *)((uint8_t *)pbd + pbd->h1.offset_to_first_pkt);
for (i = 0; i < num_pkts; i++) {
for (i = 0; i < pbd->h1.num_pkts; i++) {
pMsg->pPkgInfo[i].pPkgBase = ((uint8_t *)ppd + ppd->tp_mac);
pMsg->pPkgInfo[i].nSize = ppd->tp_snaplen;
pMsg->pPkgInfo[i].uvWork.data = &pMsg->pPkgInfo[i];
@ -198,7 +258,6 @@ void raw_sock_recv_cb(uv_poll_t *handle, int status, int events) {
ppd = (struct tpacket3_hdr *)((uint8_t *)ppd + ppd->tp_next_offset);
}
}
}
pbd->h1.block_status = TP_STATUS_KERNEL;
block_num = (block_num + 1) % PKG_MMAP_BLOCKNUM;