C++ (Cpp) nflog_build_cfg_request Beispiele

Beispiel #1

Datei: nflog.c Projekt: t0mm13b/afwall

int main(int argc, char *argv[])
{
    char buf[MNL_SOCKET_BUFFER_SIZE];
    struct nlmsghdr *nlh;
    int ret;
    unsigned int portid, qnum;

    atexit(cleanup);

    if (argc != 2) {
        printf("Usage: %s [queue_num]\n", argv[0]);
        exit(EXIT_FAILURE);
    }
    qnum = atoi(argv[1]);

    nl = mnl_socket_open(NETLINK_NETFILTER);
    if (nl == NULL) {
        perror("mnl_socket_open");
        exit(EXIT_FAILURE);
    }

    if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
        perror("mnl_socket_bind");
        exit(EXIT_FAILURE);
    }
    portid = mnl_socket_get_portid(nl);

    nlh = nflog_build_cfg_pf_request(buf, NFULNL_CFG_CMD_PF_UNBIND);

    if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
        perror("mnl_socket_send");
        exit(EXIT_FAILURE);
    }

    nlh = nflog_build_cfg_pf_request(buf, NFULNL_CFG_CMD_PF_BIND);

    if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
        perror("mnl_socket_send");
        exit(EXIT_FAILURE);
    }

    nlh = nflog_build_cfg_request(buf, NFULNL_CFG_CMD_BIND, qnum);

    if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
        perror("mnl_socket_send");
        exit(EXIT_FAILURE);
    }

    nlh = nflog_build_cfg_params(buf, NFULNL_COPY_PACKET, 0xFFFF, qnum);

    if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
        perror("mnl_socket_send");
        exit(EXIT_FAILURE);
    }

    ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
    if (ret == -1) {
        if(errno == ENOSPC || errno == ENOBUFS)  {
          /* ignore these (hopefully) recoverable errors */
        } else {
          perror("mnl_socket_recvfrom");
          exit(EXIT_FAILURE);
        }
    }
    
    while (1) {
      if (ret == -1) {
        /* reset ret and skip mnl_cb_run if previous recvfrom had an error */
        ret = 0;
      } else {
        ret = mnl_cb_run(buf, ret, 0, portid, log_cb, NULL);
        if (ret < 0) {
          perror("mnl_cb_run");
          exit(EXIT_FAILURE);
        }
      }

      ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
      if (ret == -1) {
        if (errno == ENOSPC || errno == ENOBUFS) {
          /* ignore these (hopefully) recoverable errors */
          continue;
        } else {
          perror("mnl_socket_recvfrom");
          exit(EXIT_FAILURE);
        }
      }
    }

    return 0;
}

Beispiel #2

Datei: nf-log.c Projekt: LazyZhu/rt-n56u-1

int main(int argc, char *argv[])
{
	struct mnl_socket *nl;
	char buf[MNL_SOCKET_BUFFER_SIZE];
	struct nlmsghdr *nlh;
	int ret;
	unsigned int portid, qnum;

	if (argc != 2) {
		printf("Usage: %s [queue_num]\n", argv[0]);
		exit(EXIT_FAILURE);
	}
	qnum = atoi(argv[1]);

	nl = mnl_socket_open(NETLINK_NETFILTER);
	if (nl == NULL) {
		perror("mnl_socket_open");
		exit(EXIT_FAILURE);
	}

	if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
		perror("mnl_socket_bind");
		exit(EXIT_FAILURE);
	}
	portid = mnl_socket_get_portid(nl);

	nlh = nflog_build_cfg_pf_request(buf, NFULNL_CFG_CMD_PF_UNBIND);

	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
		perror("mnl_socket_send");
		exit(EXIT_FAILURE);
	}

	nlh = nflog_build_cfg_pf_request(buf, NFULNL_CFG_CMD_PF_BIND);

	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
		perror("mnl_socket_send");
		exit(EXIT_FAILURE);
	}

	nlh = nflog_build_cfg_request(buf, NFULNL_CFG_CMD_BIND, qnum);

	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
		perror("mnl_socket_send");
		exit(EXIT_FAILURE);
	}

	nlh = nflog_build_cfg_params(buf, NFULNL_COPY_PACKET, 0xFFFF, qnum);

	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
		perror("mnl_socket_send");
		exit(EXIT_FAILURE);
	}

	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
	if (ret == -1) {
		perror("mnl_socket_recvfrom");
		exit(EXIT_FAILURE);
	}
	while (ret > 0) {
		ret = mnl_cb_run(buf, ret, 0, portid, log_cb, NULL);
		if (ret < 0){
			perror("mnl_cb_run");
			exit(EXIT_FAILURE);
		}

		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
		if (ret == -1) {
			perror("mnl_socket_recvfrom");
			exit(EXIT_FAILURE);
		}
	}

	mnl_socket_close(nl);

	return 0;
}