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; }
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; }