719 lines
16 KiB
C
719 lines
16 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <net/if_arp.h>
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#include <linux/socket.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/uio.h>
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#include "libnetlinku.h"
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#include "commuapinl.h"
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#define NETLINK_COMM_FAMILY_NUM (NETLINK_COMMMAX_MAX_FAMILY - NETLINK_COMMMAX_MIN_FAMILY -1)
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#define NETLINK_COMM_FAMILY_INDEX(family) (family - NETLINK_COMMMAX_MIN_FAMILY -1)
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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*/
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int rcvbuf = 1024 * 1024;
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struct upmnl_handle * commnl_get_handle(int protocol,unsigned int group)
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{
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struct upmnl_handle * handle = NULL;
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handle = gcommnl[NETLINK_COMM_FAMILY_INDEX(protocol)][group];
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//printf("get handle proto %d,group%d,handle = %p.\r\n",NETLINK_COMM_FAMILY_INDEX(protocol),group,handle);
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return handle;
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}
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void commnl_del_handle(int protocol,unsigned int group)
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{
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gcommnl[NETLINK_COMM_FAMILY_INDEX(protocol)][group] = NULL;
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return;
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}
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int commnl_add_handle(struct upmnl_handle * handle,int protocol,unsigned int group)
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{
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if(commnl_get_handle(protocol,group) != NULL)
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{
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printf("handel already exist,proto:%d,group%d.\r\n",protocol,group);
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return -1;
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}
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//printf("add handle %p proto %d,group%d\r\n",handle,NETLINK_COMM_FAMILY_INDEX(protocol),group);
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gcommnl[NETLINK_COMM_FAMILY_INDEX(protocol)][group]= handle;
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return 0;
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}
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void printf_mem(unsigned char * p,int len)
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{
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int num = 0;
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for(num = 0; num<len; num++)
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{
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printf("%02x ",*(p+num));
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if(((num+1)%16 == 0) || ((num+1 ) == len))
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{
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printf("\r\n");
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}
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}
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return;
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}
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void test_handle_add_get()
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{
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struct upmnl_handle handle ={
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.proto = NETLINK_COMMCFG};
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struct upmnl_handle *phandle =NULL;
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int ret = -1;
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/*test*/
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ret = commnl_add_handle(&handle,NETLINK_COMMCFG,0);
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if(ret < 0)
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printf("commnl_add_handle failed.\r\n");
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phandle = commnl_get_handle(NETLINK_COMMCFG,0);
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if(phandle == NULL)
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printf("commnl_get_handle faild\r\n.");
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commnl_del_handle(NETLINK_COMMCFG,0);
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phandle = NULL;
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phandle = commnl_get_handle(NETLINK_COMMCFG,0);
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if(phandle == NULL)
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printf("commnl_get_handle faild\r\n.");
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return ;
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}
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int commnl_addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
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int alen)
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{
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int len = RTA_LENGTH(alen);
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struct rtattr *rta;
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if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len) > maxlen) {
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fprintf(stderr,
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"addattr_l ERROR: message exceeded bound of %d\n",
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maxlen);
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return -1;
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}
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rta = NLMSG_TAIL(n);
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rta->rta_type = type;
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rta->rta_len = len;
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if (alen)
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memcpy(RTA_DATA(rta), data, alen);
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n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len);
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return 0;
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}
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int commnl_addattr(struct nlmsghdr *n, int maxlen, int type)
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{
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return commnl_addattr_l(n, maxlen, type, NULL, 0);
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}
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int commnl_addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data)
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{
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return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u8));
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}
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int commnl_addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data)
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{
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return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u16));
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}
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int commnl_addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data)
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{
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return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u32));
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}
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int commnl_addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data)
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{
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return commnl_addattr_l(n, maxlen, type, &data, sizeof(__u64));
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}
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int commnl_addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *str)
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{
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return commnl_addattr_l(n, maxlen, type, str, strlen(str)+1);
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}
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int commnl_open_byproto( unsigned int subscriptions,int protocol)
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{
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socklen_t addr_len;
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int sndbuf = 32768;
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int one = 1;
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struct upmnl_handle * upmh = NULL;
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struct timeval timeout={1,10000};//10ms
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printf("commnl_open_byproto begin:protocol=%d,subscriptions=%d\r\n",protocol,subscriptions);
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upmh = calloc(1,sizeof(struct upmnl_handle) );
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if(upmh == NULL)
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{
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printf("commnl_new_handle calloc mem error protocol:%d,group:%d.\r\n",protocol,subscriptions);
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return -1;
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}
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upmh->local.nl_family = AF_NETLINK;
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upmh->local.nl_groups = subscriptions;
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upmh->local.nl_pid = getpid();
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upmh->proto = protocol;
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upmh->fd = socket(AF_NETLINK, SOCK_RAW, protocol);
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if (upmh->fd < 0) {
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perror("Cannot open netlink socket");
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goto ERR;
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}
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if (setsockopt(upmh->fd, SOL_SOCKET, SO_SNDBUF,
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&sndbuf, sizeof(sndbuf)) < 0) {
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perror("SO_SNDBUF");
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goto ERR;
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}
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if (setsockopt(upmh->fd, SOL_SOCKET, SO_RCVBUF,
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&rcvbuf, sizeof(rcvbuf)) < 0) {
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perror("SO_RCVBUF");
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goto ERR;
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}
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if (setsockopt(upmh->fd, SOL_SOCKET, SO_RCVTIMEO,
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&timeout, sizeof(timeout)) < 0) {
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perror("SO_RCVTIMEO");
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goto ERR;
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}
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#if 0
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/* Older kernels may no support extended ACK reporting */
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setsockopt(upmh->fd, SOL_NETLINK, NETLINK_EXT_ACK,
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&one, sizeof(one));
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#endif
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memset(&upmh->local, 0, sizeof(upmh->local));
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upmh->local.nl_family = AF_NETLINK;
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upmh->local.nl_pid = getpid();
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upmh->local.nl_groups = subscriptions;
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if (bind(upmh->fd, (struct sockaddr *)&(upmh->local),
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sizeof(upmh->local)) < 0) {
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perror("Cannot bind netlink socket");
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//printf("Cannot bind netlink socket\r\n");
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goto ERR;
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}
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addr_len = sizeof(upmh->local);
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if (getsockname(upmh->fd, (struct sockaddr *)&upmh->local,
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&addr_len) < 0) {
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perror("Cannot getsockname");
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goto ERR;
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}
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if (addr_len != sizeof(upmh->local)) {
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fprintf(stderr, "Wrong address length %d\n", addr_len);
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goto ERR;
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}
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if (upmh->local.nl_family != AF_NETLINK) {
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fprintf(stderr, "Wrong address family %d\n",
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upmh->local.nl_family);
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goto ERR;
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}
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upmh->seq = time(NULL);
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commnl_add_handle(upmh, protocol, subscriptions);
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printf("commnl_open_byproto succes.\r\n");
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return 0;
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ERR:
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if (upmh->fd >= 0) {
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close(upmh->fd);
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upmh->fd = -1;
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}
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if(NULL != upmh){
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free(upmh);
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}
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commnl_del_handle(protocol, subscriptions);
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return -1;
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}
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void commnl_close( unsigned int subscriptions,int protocol)
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{
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struct upmnl_handle *upmh = commnl_get_handle(protocol,subscriptions);
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if (upmh->fd >= 0) {
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close(upmh->fd);
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upmh->fd = -1;
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}
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commnl_del_handle(upmh->proto, upmh->local.nl_groups);
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free(upmh);
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return;
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}
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int commcfgnl_open()
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{
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return commnl_open_byproto(0, NETLINK_COMMCFG);
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}
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void commcfgnl_close()
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{
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commnl_close(0,NETLINK_COMMCFG);
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return;
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}
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int pdelivnl_open()
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{
|
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return commnl_open_byproto(PDNLGRP_ALLRAW, NETLINK_PDELIVERY);
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}
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|||
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void pdelivnl_close()
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{
|
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commnl_close(PDNLGRP_ALLRAW,NETLINK_PDELIVERY);
|
|||
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return;
|
|||
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|
}
|
|||
|
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|
|||
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int commnl_send(struct upmnl_handle *nl, struct nlmsghdr *n)
|
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{
|
|||
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return 0;
|
|||
|
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}
|
|||
|
|
|
|||
|
|
|
|||
|
|
static int __commnl_recvmsg(int fd, struct msghdr *msg, int flags)
|
|||
|
|
{
|
|||
|
|
int len;
|
|||
|
|
unsigned int num = COMMNL_TALKRCV_TIMEOUT;/*10秒超时*/
|
|||
|
|
|
|||
|
|
do {
|
|||
|
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len = recvmsg(fd, msg, flags);
|
|||
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num --;
|
|||
|
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if(num ==0)
|
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break;
|
|||
|
|
|
|||
|
|
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;
|
|||
|
|
|
|||
|
|
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);
|
|||
|
|
|
|||
|
|
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;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* change msg to use the response iov */
|
|||
|
|
msg.msg_iov = &riov;
|
|||
|
|
msg.msg_iovlen = 1;
|
|||
|
|
i = 0;
|
|||
|
|
while (1) {
|
|||
|
|
next:
|
|||
|
|
status = commnl_recvmsg(rtnl->fd, &msg, &buf);
|
|||
|
|
++i;
|
|||
|
|
|
|||
|
|
if (status < 0)
|
|||
|
|
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));
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (h->nlmsg_type == NLMSG_ERROR) {
|
|||
|
|
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;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
fprintf(stderr, "Unexpected reply!!!\n");
|
|||
|
|
|
|||
|
|
status -= NLMSG_ALIGN(len);
|
|||
|
|
h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
|
|||
|
|
}
|
|||
|
|
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;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
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;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return(commnl_talk(nl,n,answer));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
int pdelivnl_listen(int group,
|
|||
|
|
pdelivnl_listen_filter_t handler,
|
|||
|
|
void *jarg)
|
|||
|
|
{
|
|||
|
|
struct upmnl_handle *nl = NULL;
|
|||
|
|
|
|||
|
|
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("pdelivnl_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 (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();
|
|||
|
|
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();
|
|||
|
|
|
|||
|
|
printf("pdeliv_main exit!\r\n");
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
|