secgateway/Platform/user/netlink_uapi/libnetlinku.c

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <net/if_arp.h>
#include <linux/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/uio.h>
#include <linux/types.h>

#include "libnetlinku.h"
#include "commuapinl.h"

#ifndef SOL_NETLINK
#define SOL_NETLINK 270  
#endif

#ifndef NETLINK_EXT_ACK
#define NETLINK_EXT_ACK			11
#endif

#if 0
struct nlumsg_list {
	struct list_head list;
	struct nlmsghdr *n;
};
#endif

#define NETLINK_COMM_FAMILY_NUM (NETLINK_COMMMAX_MAX_FAMILY - NETLINK_COMMMAX_MIN_FAMILY -1)
#define NETLINK_COMM_FAMILY_INDEX(family) (family - NETLINK_COMMMAX_MIN_FAMILY -1) 

struct upmnl_handle * gcommnl[NETLINK_COMM_FAMILY_NUM][COMMLIBNLGRP_MAX] = {0};/*包含单播和组播一起，组0是单播，1开始是组播*/


int rcvbuf = 1024 * 1024;

struct upmnl_handle * commnl_get_handle(int protocol,unsigned int group)
{
	struct upmnl_handle * handle = NULL;

	handle = gcommnl[NETLINK_COMM_FAMILY_INDEX(protocol)][group];
	//printf("get handle proto %d,group%d,handle = %p.\r\n",NETLINK_COMM_FAMILY_INDEX(protocol),group,handle);
	return handle;
}

void commnl_del_handle(int protocol,unsigned int group)
{
	gcommnl[NETLINK_COMM_FAMILY_INDEX(protocol)][group] = NULL;

	return;
}

int commnl_add_handle(struct upmnl_handle *  handle,int protocol,unsigned int group)
{	
	if(commnl_get_handle(protocol,group) != NULL)
		{
			printf("handel already exist,proto:%d,group%d.\r\n",protocol,group);
			return -1;
		}

	//printf("add handle %p proto %d,group%d\r\n",handle,NETLINK_COMM_FAMILY_INDEX(protocol),group);
	gcommnl[NETLINK_COMM_FAMILY_INDEX(protocol)][group]= handle;

	return 0;
}

void printf_mem(unsigned char * p,int len)
{
	int num = 0;
	
	for(num = 0; num<len; num++)
	{
		printf("%02x ",*(p+num));
		if(((num+1)%16 == 0) || ((num+1 ) == len))
			{
				printf("\r\n");
			}
	}

	return;
}

void test_handle_add_get()
{
	struct upmnl_handle handle ={
		.proto = NETLINK_COMMCFG};
		
	struct upmnl_handle *phandle =NULL;
	int ret = -1;

	/*test*/
		
	ret = commnl_add_handle(&handle,NETLINK_COMMCFG,0);
	if(ret < 0)
		printf("commnl_add_handle failed.\r\n");

	phandle = commnl_get_handle(NETLINK_COMMCFG,0);
	if(phandle == NULL)
		printf("commnl_get_handle faild\r\n.");
	commnl_del_handle(NETLINK_COMMCFG,0);
	phandle = NULL;
	phandle = commnl_get_handle(NETLINK_COMMCFG,0);
	if(phandle == NULL)
		printf("commnl_get_handle faild\r\n.");

	return ;

}

int commnl_addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
	      int alen)
{
	int len = RTA_LENGTH(alen);
	struct rtattr *rta;

	if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len) > maxlen) {
		fprintf(stderr,
			"addattr_l ERROR: message exceeded bound of %d\n",
			maxlen);
		return -1;
	}
	rta = NLMSG_TAIL(n);
	rta->rta_type = type;
	rta->rta_len = len;
	if (alen)
		memcpy(RTA_DATA(rta), data, alen);
	n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len);
	return 0;
}

int commnl_addattr(struct nlmsghdr *n, int maxlen, int type)
{
  return commnl_addattr_l(n, maxlen, type, NULL, 0);
}

int commnl_addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data)
{
  return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u8));
}

int commnl_addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data)
{
  return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u16));
}

int commnl_addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data)
{
  return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u32));
}

int commnl_addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data)
{
  return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u64));
}

int commnl_addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *str)
{
  return commnl_addattr_l(n, maxlen, type, str, strlen(str)+1);
}


int commnl_open_byproto( unsigned int subscriptions,int protocol)
{
	socklen_t addr_len;
	int sndbuf = 32768;
	int one = 1;
	struct upmnl_handle * upmh = NULL;
	struct timeval timeout={1,10000};//10ms
	
	printf("commnl_open_byproto begin:protocol=%d,subscriptions=%d\r\n",protocol,subscriptions);

	upmh = calloc(1,sizeof(struct upmnl_handle) );
	if(upmh == NULL)
	{
		printf("commnl_new_handle calloc mem error protocol:%d,group:%d.\r\n",protocol,subscriptions);
		return -1;
	}
	
	upmh->local.nl_family = AF_NETLINK;
	upmh->local.nl_groups = subscriptions;
	upmh->local.nl_pid =  getpid();
	upmh->proto = protocol;

	upmh->fd = socket(AF_NETLINK, SOCK_RAW, protocol);
	if (upmh->fd < 0) {
		perror("Cannot open netlink socket");
		goto ERR;
	}

	if (setsockopt(upmh->fd, SOL_SOCKET, SO_SNDBUF,
		       &sndbuf, sizeof(sndbuf)) < 0) {
		perror("SO_SNDBUF");
		goto ERR;
	}

	if (setsockopt(upmh->fd, SOL_SOCKET, SO_RCVBUF,
		       &rcvbuf, sizeof(rcvbuf)) < 0) {
		perror("SO_RCVBUF");
		goto ERR;
	}
			   
	if (setsockopt(upmh->fd, SOL_SOCKET, SO_RCVTIMEO,
		       &timeout, sizeof(timeout)) < 0) {
		perror("SO_RCVTIMEO");
		goto ERR;
	}			   

	/* Older kernels may no support extended ACK reporting */
	if (setsockopt(upmh->fd, SOL_NETLINK, NETLINK_EXT_ACK,
		   &one, sizeof(one))){
		perror("NETLINK_EXT_ACK");
		goto ERR;
   	}
		   
	memset(&upmh->local, 0, sizeof(upmh->local));
	upmh->local.nl_family = AF_NETLINK;
	upmh->local.nl_pid = getpid();
	upmh->local.nl_groups = subscriptions;
	
	if (bind(upmh->fd, (struct sockaddr *)&(upmh->local),
		 sizeof(upmh->local)) < 0) {
		perror("Cannot bind netlink socket");
		//printf("Cannot bind netlink socket\r\n");
		goto ERR;
	}
	 
	addr_len = sizeof(upmh->local);
	if (getsockname(upmh->fd, (struct sockaddr *)&upmh->local,
			&addr_len) < 0) {
		perror("Cannot getsockname");
		goto ERR;
	}
	if (addr_len != sizeof(upmh->local)) {
		fprintf(stderr, "Wrong address length %d\n", addr_len);
		goto ERR;
	}
	if (upmh->local.nl_family != AF_NETLINK) {
		fprintf(stderr, "Wrong address family %d\n",
			upmh->local.nl_family);
		goto ERR;
	}
	upmh->seq = time(NULL);

	commnl_add_handle(upmh, protocol, subscriptions);
	
	printf("commnl_open_byproto succes.\r\n");
	return 0;

ERR:
		if (upmh->fd >= 0) {
			close(upmh->fd);
			upmh->fd = -1;
		}
				
		if(NULL != upmh){
			free(upmh);
		}
		
		commnl_del_handle(protocol, subscriptions);
		
		return -1;
}
			  
void commnl_close( unsigned int subscriptions,int protocol)
{
	struct upmnl_handle *upmh = commnl_get_handle(protocol,subscriptions);

  if (upmh->fd >= 0) {
	  close(upmh->fd);
	  upmh->fd = -1;
  }
  
  commnl_del_handle(upmh->proto, upmh->local.nl_groups);

  free(upmh);

  return;
}


int commcfgnl_open()
{
  return commnl_open_byproto(0, NETLINK_COMMCFG);
}

void commcfgnl_close()
{
	commnl_close(0,NETLINK_COMMCFG);
	return;
}

int pdelivnl_open(unsigned int group)
{
  return commnl_open_byproto(group, NETLINK_PDELIVERY);
}


void pdelivnl_close(unsigned int group)
{
	commnl_close(group,NETLINK_PDELIVERY);	
	return;
}



int commnl_send(struct upmnl_handle *nl, struct nlmsghdr *n)
{
	int ret = -1;
	
	//if(n->nlmsg_flags |NLM_F_ACK)
		
	
	ret = send(nl->fd, n, n->nlmsg_len, 0);
	
}

int commcfg_send(struct nlmsghdr *n)
{
	struct upmnl_handle *nl = NULL;
	
	nl = commnl_get_handle(NETLINK_COMMCFG,0);
	if(nl == NULL)
	  {
		  printf("err:pdeliv_talk faid,pdeliv netlink has not open.\r\n");
		  return -1;
	  }
	
	return(commnl_send(nl,n));
}

int pdelivnl_send(int group,struct nlmsghdr *n)
{
	struct upmnl_handle *nl = NULL;
	
	nl = commnl_get_handle(NETLINK_PDELIVERY,group);
	if(nl == NULL)
	  {
		  printf("err:pdeliv_talk faid,pdeliv netlink has not open.\r\n");
		  return -1;
	  }
	
	return(commnl_send(nl,n));
}

static int __commnl_recvmsg(int fd, struct msghdr *msg, int flags)
{
	int len = 0;
	unsigned int num = COMMNL_TALKRCV_TIMEOUT;/*timeout*/
	
	do {
		len = recvmsg(fd, msg, flags);
#if 1
		num --;
		if(num ==0)
			break;
#endif
		printf("__rtnl_recvmsg return num %d.\r\n",num);
	} while (len < 0 && (errno == EINTR || errno == EAGAIN));/*超时*/

	if (len < 0) {
		fprintf(stderr, "netlink receive error %s (%d)\n",
			strerror(errno), errno);
		return -errno;
	}

	if (len == 0) {
		fprintf(stderr, "EOF on netlink\n");
		return -ENODATA;
	}

	return len;
}


static int commnl_recvmsg(int fd, struct msghdr *msg, char **answer)
{
	struct iovec *iov = msg->msg_iov;
	char *buf;
	int len;
	struct nlmsghdr *recv_hdr;
	

	iov->iov_base = NULL;
	iov->iov_len = 0;

	len = __commnl_recvmsg(fd, msg, MSG_PEEK | MSG_TRUNC);
	if (len < 0)
		return len;

	if (len < 32768)
		len = 32768;
	buf = malloc(len);
	if (!buf) {
		fprintf(stderr, "malloc error: not enough buffer\n");
		return -ENOMEM;
	}

	iov->iov_base = buf;
	iov->iov_len = len;

	len = __commnl_recvmsg(fd, msg, 0);
	if (len < 0) {
		free(buf);
		return len;
	}

	if (answer)
		*answer = buf;
	else
		free(buf);
	recv_hdr = (struct nlmsghdr *)(*answer);	

	return len;
}


static int __commnl_talk_iov(struct upmnl_handle *rtnl, struct iovec *iov,
			   size_t iovlen, struct nlmsghdr **answer,
			   bool show_rtnl_err, nl_ext_ack_fn_t errfn)
{
	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
	struct iovec riov;
	struct msghdr msg = {
		.msg_name = &nladdr,
		.msg_namelen = sizeof(nladdr),
		.msg_iov = iov,
		.msg_iovlen = iovlen,
	};
	unsigned int seq = 0;
	struct nlmsghdr *h;
	int i, status;
	char *buf;

	for (i = 0; i < iovlen; i++) {
		h = iov[i].iov_base;
		h->nlmsg_seq = seq = ++rtnl->seq;
		if (answer == NULL)
			h->nlmsg_flags |= NLM_F_ACK;
	}

	status = sendmsg(rtnl->fd, &msg, 0);
	if (status < 0) {
		perror("Cannot talk to rtnetlink");
		return -1;
	}
	else{
		printf("__commnl_talk_iov send msg sucess.\r\n");
	}

	/* change msg to use the response iov */
	msg.msg_iov = &riov;
	msg.msg_iovlen = 1;
	i = 0;
	while (1) {
next:
		printf("talk recvmsg-ing...\r\n");
		status = commnl_recvmsg(rtnl->fd, &msg, &buf);
		++i;

		if (status < 0)
		{
			printf("__commnl_talk_iov: commnl_recvmsg return error=%d...\r\n",status);
			return status;
		}

		if (msg.msg_namelen != sizeof(nladdr)) {
			fprintf(stderr,
				"sender address length == %d\n",
				msg.msg_namelen);
			exit(1);
		}
		for (h = (struct nlmsghdr *)buf; status >= sizeof(*h); ) {
			int len = h->nlmsg_len;
			int l = len - sizeof(*h);

			if (l < 0 || len > status) {
				if (msg.msg_flags & MSG_TRUNC) {
					fprintf(stderr, "Truncated message\n");
					free(buf);
					return -1;
				}
				fprintf(stderr,
					"!!!malformed message: len=%d\n",
					len);
				exit(1);
			}

			/*单播消息，pid必须正确*/
			if (nladdr.nl_pid != 0 ||
			    h->nlmsg_pid != rtnl->local.nl_pid ||
			    h->nlmsg_seq > seq || h->nlmsg_seq < seq - iovlen) {
				/* Don't forget to skip that message. */
				status -= NLMSG_ALIGN(len);
				h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
				printf("__commnl_talk_iov recv a msg,but not to me:h->nlmsg_pid=%d,local_pid=%d,h->nlmsg_seq=%d,seq=%d.\r\n",
					h->nlmsg_pid,rtnl->local.nl_pid,h->nlmsg_seq,seq);
				continue;
			}

			if (h->nlmsg_type == NLMSG_ERROR) {
				printf("nltalk recv a ack msg.\r\n");
				struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
				int error = err->error;

				if (l < sizeof(struct nlmsgerr)) {
					fprintf(stderr, "ERROR truncated\n");
					free(buf);
					return -1;
				}

				if (!error) {
					/* check messages from kernel */
					//nl_dump_ext_ack(h, errfn);
				} else {
					//errno = -error;

					//if (rtnl->proto != NETLINK_SOCK_DIAG && show_rtnl_err)
						//rtnl_talk_error(h, err, errfn);
				}

				if (answer)
					*answer = (struct nlmsghdr *)buf;
				else
					free(buf);

				if (i < iovlen)
					goto next;
				return error ? -i : 0;
			}

			if (answer) {
				*answer = (struct nlmsghdr *)buf;
				return 0;/*find the first one，give it to user.*/
			}

			fprintf(stderr, "Unexpected reply!!!\n");

			status -= NLMSG_ALIGN(len);
			h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
			printf("goto next nlmsghdr");
		}
		free(buf);

		if (msg.msg_flags & MSG_TRUNC) {
			fprintf(stderr, "Message truncated\n");
			continue;
		}

		if (status) {
			fprintf(stderr, "!!!Remnant of size %d\n", status);
			exit(1);
		}
	}
}

static int __commnl_talk(struct upmnl_handle *nl, struct nlmsghdr *n,
		       struct nlmsghdr **answer,
		       bool show_rtnl_err, nl_ext_ack_fn_t errfn)
{
	struct iovec iov = {
		.iov_base = n,
		.iov_len = n->nlmsg_len
	};
	
	return __commnl_talk_iov(nl, &iov, 1, answer, show_rtnl_err, errfn);
}



int commnl_talk(struct upmnl_handle *nl, struct nlmsghdr *n,
	      struct nlmsghdr **answer)
{
	return __commnl_talk(nl, n, answer, true, NULL);
}

int pdeliv_talk(int group,struct nlmsghdr *n,  struct nlmsghdr **answer)
{
  struct upmnl_handle *nl = NULL;

  nl = commnl_get_handle(NETLINK_PDELIVERY,group);
  if(nl == NULL)
	{
		printf("pdeliv_talk faid,pdeliv netlink has not open.\r\n");
		return -1;
	}
	
  printf("pdeliv_talk send msg type=%d,len=%d.\r\n",n->nlmsg_type,n->nlmsg_len);
  return(commnl_talk(nl,n,answer));
}

int commcfg_talk(struct nlmsghdr *n,  struct nlmsghdr **answer)
{
  struct upmnl_handle *nl = NULL;

  nl = commnl_get_handle(NETLINK_COMMCFG,0);
  if(nl == NULL)
	{
		printf("commcfg_talk faid,commcfg netlink has not open.\r\n");
		return -1;
	}
  
  printf("commcfg_talk send msg type=%d,len=%d.\r\n",n->nlmsg_type,n->nlmsg_len);
  return(commnl_talk(nl,n,answer));
}


int pdelivnl_listen(int group,
	  pdelivnl_listen_filter_t handler,
	  void *jarg)
{
	struct upmnl_handle *nl = NULL;

	printf("pdelivnl_listen:.\r\n");
	
	nl = commnl_get_handle(NETLINK_PDELIVERY,group);
	if(nl == NULL)
	  {
		  printf("pdelivnl_listen faid,pdeliv netlink has not open.\r\n");
		  return -1;
	  }

	return(conmnl_listen(nl,handler,jarg));
}

int conmnl_listen(struct upmnl_handle *nl,
		pdelivnl_listen_filter_t handler,
		void *jarg)
{
	int status;
	struct nlmsghdr *h;
	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
	struct iovec iov;
	struct msghdr msg = {
		.msg_name = &nladdr,
		.msg_namelen = sizeof(nladdr),
		.msg_iov = &iov,
		.msg_iovlen = 1,
	};
	char   buf[16384];
	char   cmsgbuf[BUFSIZ];

	//printf("conmnl_listen begin.\r\n");

#if 0
	if (nl->flags & RTNL_HANDLE_F_LISTEN_ALL_NSID) {
		msg.msg_control = &cmsgbuf;
		msg.msg_controllen = sizeof(cmsgbuf);
	}
#endif

	iov.iov_base = buf;
	while (1) {
		struct pdelivnl_ctrl_data ctrl;
		struct cmsghdr *cmsg;
		
		//printf("pdelivnl_listen recvmsg....\r\n");
		iov.iov_len = sizeof(buf);
		//status = recvmsg(nl->fd, &msg, MSG_WAITALL);
		if(nl->fd <= 0)
		{
			printf("conmnl_listen fd is closed,fd = %d,exist listen.\r\rn",nl->fd);
			return 0;
		}
		
		status = recvmsg(nl->fd, &msg, MSG_WAITFORONE);

		if (status < 0) {
			if (errno == EINTR || errno == EAGAIN)/*超时*/
				continue;
			fprintf(stderr, "netlink receive error: %s (%d)\n",
				strerror(errno), errno);
			if (errno == ENOBUFS)
				continue;
			return -1;
		}
		if (status == 0) {
			fprintf(stderr, "EOF on netlink\n");
			return -1;
		}
		if (msg.msg_namelen != sizeof(nladdr)) {
			fprintf(stderr,
				"Sender address length == %d\n",
				msg.msg_namelen);
			exit(1);
		}

#if 0
		if (nl->flags & RTNL_HANDLE_F_LISTEN_ALL_NSID) {
			memset(&ctrl, 0, sizeof(ctrl));
			ctrl.nsid = -1;
			for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
			     cmsg = CMSG_NXTHDR(&msg, cmsg))
				if (cmsg->cmsg_level == SOL_NETLINK &&
				    cmsg->cmsg_type == NETLINK_LISTEN_ALL_NSID &&
				    cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
					int *data = (int *)CMSG_DATA(cmsg);

					ctrl.nsid = *data;
				}
		}
#endif

#if 1
	
		//printf("pdelivnl_listen prase msg:\r\n");
		for (h = (struct nlmsghdr *)buf; status >= sizeof(*h); ) {
			int err;
			int len = h->nlmsg_len;
			int l = len - sizeof(*h);

			if (l < 0 || len > status) {
				//if (msg.msg_flags & MSG_TRUNC) {
					//fprintf(stderr, "Truncated message\n");
					//return -1;
				//}
				fprintf(stderr,
					"!!!malformed message: len=%d\n",
					len);
				exit(1);
			}

			err = handler(&ctrl, h, jarg);
			if (err < 0)
				return err;

			status -= NLMSG_ALIGN(len);
			h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
		}
#endif

		//if (msg.msg_flags & MSG_TRUNC) {
			//fprintf(stderr, "Message truncated\n");
			//continue;
		//}
		if (status) {
			fprintf(stderr, "!!!Remnant of size %d\n", status);
			exit(1);
		}
	}
}

#if 0
int upnl_dump_type(struct upmnl_handle *upmh, unsigned int type)
{
	struct {
		struct nlmsghdr nlh;
		//struct rtgenmsg g;
	} req;
	struct sockaddr_nl nladdr;

	memset(&nladdr, 0, sizeof(nladdr));
	memset(&req, 0, sizeof(req));
	nladdr.nl_family = AF_NETLINK;

	req.nlh.nlmsg_len = sizeof(req);
 	req.nlh.nlmsg_type = type;
	req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
	req.nlh.nlmsg_pid = 0;
	//req.nlh.nlmsg_seq = upmh->rtnl_dump = ++(upmh->rtnl_seq);
	req.nlh.nlmsg_seq = 1;
	//req.g.rtgen_family = AF_INET;

	return sendto(upmh->fd, &req, sizeof(req), 0,
		      (struct sockaddr*)&nladdr, sizeof(nladdr));
}
#endif

int pdeliv_main(pdelivnl_listen_filter_t process_pkt)
{	
	int ret = -1; 

	printf("pdeliv_main begin:\r\n");

	/*创建通道*/
	ret = pdelivnl_open(PDNLGRP_ALLRAW);
	if(ret < 0)
	{
		printf("pdelivnl_open fail,exit.\r\n");
		return -1;
	}
	
	/*接收报文*/
	pdelivnl_listen(PDNLGRP_ALLRAW,process_pkt,NULL);


	/*关闭netlink通道*/
	pdelivnl_close(PDNLGRP_ALLRAW);

	printf("pdeliv_main exit!\r\n");
	return 0;
}



void nl_debugfs(struct nlmsghdr *n)
{
	struct netlink_debugfs *debugfs_total =NULL;
	struct netlink_debugfs *debugfs_msgtype =NULL;
	int msg_len = 0;

	debugfs_total = (struct netlink_debugfs *)NLMSG_DATA(n);/*msg data*/
	msg_len = (n)->nlmsg_len - NLMSG_HDRLEN; /*msg_len*/

	debugfs_msgtype = debugfs_total+1;

	printf("netlink total msg stats:\r\n");
	printf("  rev_total = %d\n",debugfs_total->rev_total);
	printf("  rev_cb_sucess = %d\n",debugfs_total->rev_cb_sucess);
	printf("  rev_cb_fail = %d\n",debugfs_total->rev_cb_fail);
	printf("  rev_drop_total = %d\n",debugfs_total->rev_drop_total);
	printf("  rev_drop_nodoit = %d\n",debugfs_total->rev_drop_nodoit);
	printf("  send_succ = %d\n",debugfs_total->send_succ);
	printf("  send_fail = %d\n",debugfs_total->send_fail);

	printf("netlink msg stats:\r\n");
	printf("  rev_total = %d\n",debugfs_msgtype->rev_total);
	printf("  rev_cb_sucess = %d\n",debugfs_msgtype->rev_cb_sucess);
	printf("  rev_cb_fail = %d\n",debugfs_msgtype->rev_cb_fail);
	printf("  rev_drop_total = %d\n",debugfs_msgtype->rev_drop_total);
	printf("  rev_drop_nodoit = %d\n",debugfs_msgtype->rev_drop_nodoit);
	printf("  send_succ = %d\n",debugfs_msgtype->send_succ);
	printf("  send_fail = %d\n",debugfs_msgtype->send_fail);

	return;
}


void nl_debugfs_extack(struct nlmsghdr *n)
{
	//struct netlink_debugfs *debugfs_statis =NULL;
	char * rcv_cookies = NULL;
	int msg_len = 0;
	struct nlmsgerr *errmsg = NULL;
	struct rtattr * cookies = NULL;
	int cookies_len = 0;
	char * ptr;

	printf("nl_debugfs_extack said:\r\nmsgtype=%d,msglen=%d\r\n",n->nlmsg_type,n->nlmsg_len);

	errmsg = (struct nlmsgerr *)NLMSG_DATA(n);/*msg data*/
	msg_len = (n)->nlmsg_len - NLMSG_HDRLEN; /*msg_len*/
	
	printf("ack result=%d,ack msgtype:%d\r\n",errmsg->error,errmsg->msg.nlmsg_type);

	if(errmsg->error == 0)/*ack result is SUCESS*/
	{
		ptr = (char * )errmsg + sizeof(struct nlmsgerr);
		cookies = (struct rtattr *)ptr;
		//if(NLMSGERR_ATTR_COOKIE == cookies->rta_type)
		{
			cookies_len = cookies->rta_len;

			rcv_cookies = RTA_DATA(cookies);
			printf("nl_debugfs_extack rcv cookies:%s.\r\n",rcv_cookies);

		}
		
			
	}
	else{
		printf("nl_debugfs kernel said fail,error =%d.\r\n",errmsg->error);
		}
	

	return;
}