From 5573d0146c1ae71ac5b3e4ba6a12c00585646a1a Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Sun, 27 Nov 2016 23:26:56 +0100 Subject: src: support for stateful objects This patch allows you to add, to delete and to get stateful objects, this support two object types: counter and quota. Signed-off-by: Pablo Neira Ayuso --- examples/nft-obj-add.c | 123 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 examples/nft-obj-add.c (limited to 'examples/nft-obj-add.c') diff --git a/examples/nft-obj-add.c b/examples/nft-obj-add.c new file mode 100644 index 0000000..83941c4 --- /dev/null +++ b/examples/nft-obj-add.c @@ -0,0 +1,123 @@ +/* + * (C) 2012-2016 by Pablo Neira Ayuso + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include + +#include +#include + +#include +#include + +static struct nftnl_obj *obj_add_parse(int argc, char *argv[]) +{ + struct nftnl_obj *t; + uint16_t family; + + if (strcmp(argv[1], "ip") == 0) + family = NFPROTO_IPV4; + else if (strcmp(argv[1], "ip6") == 0) + family = NFPROTO_IPV6; + else if (strcmp(argv[1], "bridge") == 0) + family = NFPROTO_BRIDGE; + else if (strcmp(argv[1], "arp") == 0) + family = NFPROTO_ARP; + else { + fprintf(stderr, "Unknown family: ip, ip6, bridge, arp\n"); + return NULL; + } + + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + return NULL; + } + + nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family); + nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_COUNTER); + nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]); + + return t; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, obj_seq, family; + struct nftnl_obj *t; + struct mnl_nlmsg_batch *batch; + int ret; + + if (argc != 4) { + fprintf(stderr, "%s \n", argv[0]); + exit(EXIT_FAILURE); + } + + t = obj_add_parse(argc, argv); + if (t == NULL) + exit(EXIT_FAILURE); + + seq = time(NULL); + batch = mnl_nlmsg_batch_start(buf, sizeof(buf)); + + nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + + obj_seq = seq; + family = nftnl_obj_get_u32(t, NFTNL_OBJ_FAMILY); + nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch), + NFT_MSG_NEWOBJ, family, NLM_F_ACK, seq++); + nftnl_obj_nlmsg_build_payload(nlh, t); + nftnl_obj_free(t); + mnl_nlmsg_batch_next(batch); + + nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + + 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); + + if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch), + mnl_nlmsg_batch_size(batch)) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + mnl_nlmsg_batch_stop(batch); + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + while (ret > 0) { + ret = mnl_cb_run(buf, ret, obj_seq, portid, NULL, NULL); + if (ret <= 0) + break; + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + } + if (ret == -1) { + perror("error"); + exit(EXIT_FAILURE); + } + mnl_socket_close(nl); + + return EXIT_SUCCESS; +} -- cgit v1.2.3