From eb58f53372e7475b65f6d7ee2b72507c4580007e Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 29 Nov 2017 13:07:02 +0100 Subject: src: add flowtable support This patch allows you to add, delete and list flowtable through the existing netlink interface. Signed-off-by: Pablo Neira Ayuso --- examples/Makefile.am | 12 ++++ examples/nft-flowtable-add.c | 136 +++++++++++++++++++++++++++++++++++++++++++ examples/nft-flowtable-del.c | 122 ++++++++++++++++++++++++++++++++++++++ examples/nft-flowtable-get.c | 121 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 391 insertions(+) create mode 100644 examples/nft-flowtable-add.c create mode 100644 examples/nft-flowtable-del.c create mode 100644 examples/nft-flowtable-get.c (limited to 'examples') diff --git a/examples/Makefile.am b/examples/Makefile.am index 48bc7a1..c0d84eb 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -25,6 +25,9 @@ check_PROGRAMS = nft-table-add \ nft-obj-add \ nft-obj-get \ nft-obj-del \ + nft-flowtable-add \ + nft-flowtable-del \ + nft-flowtable-get \ nft-ruleset-get \ nft-ruleset-parse-file \ nft-compat-get @@ -104,6 +107,15 @@ nft_obj_del_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} nft_obj_get_SOURCES = nft-obj-get.c nft_obj_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} +nft_flowtable_add_SOURCES = nft-flowtable-add.c +nft_flowtable_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} + +nft_flowtable_del_SOURCES = nft-flowtable-del.c +nft_flowtable_del_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} + +nft_flowtable_get_SOURCES = nft-flowtable-get.c +nft_flowtable_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} + nft_ruleset_get_SOURCES = nft-ruleset-get.c nft_ruleset_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} diff --git a/examples/nft-flowtable-add.c b/examples/nft-flowtable-add.c new file mode 100644 index 0000000..bd6cd0f --- /dev/null +++ b/examples/nft-flowtable-add.c @@ -0,0 +1,136 @@ +#include +#include +#include +#include + +#include +#include + +#include +#include + +static struct nftnl_flowtable *flowtable_add_parse(int argc, char *argv[]) +{ + const char *dev_array[] = { "eth0", "tap0", NULL }; + struct nftnl_flowtable *t; + int hooknum = 0; + + if (strcmp(argv[4], "ingress") == 0) + hooknum = NF_NETDEV_INGRESS; + else { + fprintf(stderr, "Unknown hook: %s\n", argv[4]); + return NULL; + } + + t = nftnl_flowtable_alloc(); + if (t == NULL) { + perror("OOM"); + return NULL; + } + nftnl_flowtable_set(t, NFTNL_FLOWTABLE_TABLE, argv[2]); + nftnl_flowtable_set(t, NFTNL_FLOWTABLE_NAME, argv[3]); + if (argc == 6) { + nftnl_flowtable_set_u32(t, NFTNL_FLOWTABLE_HOOKNUM, hooknum); + nftnl_flowtable_set_u32(t, NFTNL_FLOWTABLE_PRIO, atoi(argv[5])); + } + nftnl_flowtable_set_array(t, NFTNL_FLOWTABLE_DEVICES, dev_array); + + 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, flowtable_seq; + int ret, family; + struct nftnl_flowtable *t; + struct mnl_nlmsg_batch *batch; + int batching; + + if (argc != 6) { + fprintf(stderr, "Usage: %s \n", + argv[0]); + exit(EXIT_FAILURE); + } + + 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"); + exit(EXIT_FAILURE); + } + + t = flowtable_add_parse(argc, argv); + if (t == NULL) + exit(EXIT_FAILURE); + + batching = nftnl_batch_is_supported(); + if (batching < 0) { + perror("cannot talk to nfnetlink"); + exit(EXIT_FAILURE); + } + + seq = time(NULL); + batch = mnl_nlmsg_batch_start(buf, sizeof(buf)); + + if (batching) { + nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + } + + flowtable_seq = seq; + nlh = nftnl_flowtable_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch), + NFT_MSG_NEWFLOWTABLE, family, + NLM_F_CREATE|NLM_F_ACK, seq++); + nftnl_flowtable_nlmsg_build_payload(nlh, t); + nftnl_flowtable_free(t); + mnl_nlmsg_batch_next(batch); + + if (batching) { + 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, flowtable_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; +} diff --git a/examples/nft-flowtable-del.c b/examples/nft-flowtable-del.c new file mode 100644 index 0000000..b25f041 --- /dev/null +++ b/examples/nft-flowtable-del.c @@ -0,0 +1,122 @@ +#include +#include +#include +#include + +#include +#include + +#include +#include + +static struct nftnl_flowtable *flowtable_del_parse(int argc, char *argv[]) +{ + struct nftnl_flowtable *t; + + t = nftnl_flowtable_alloc(); + if (t == NULL) { + perror("OOM"); + return NULL; + } + + nftnl_flowtable_set(t, NFTNL_FLOWTABLE_TABLE, argv[2]); + nftnl_flowtable_set(t, NFTNL_FLOWTABLE_NAME, argv[3]); + + return t; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + struct mnl_nlmsg_batch *batch; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, flowtable_seq; + struct nftnl_flowtable *t; + int ret, family, batching; + + if (argc != 4) { + fprintf(stderr, "Usage: %s
\n", + argv[0]); + exit(EXIT_FAILURE); + } + + 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"); + exit(EXIT_FAILURE); + } + + t = flowtable_del_parse(argc, argv); + if (t == NULL) + exit(EXIT_FAILURE); + + batching = nftnl_batch_is_supported(); + if (batching < 0) { + perror("cannot talk to nfnetlink"); + exit(EXIT_FAILURE); + } + + seq = time(NULL); + batch = mnl_nlmsg_batch_start(buf, sizeof(buf)); + + if (batching) { + nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + } + + flowtable_seq = seq; + nlh = nftnl_flowtable_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch), + NFT_MSG_DELFLOWTABLE, family, + NLM_F_ACK, seq++); + nftnl_flowtable_nlmsg_build_payload(nlh, t); + nftnl_flowtable_free(t); + mnl_nlmsg_batch_next(batch); + + if (batching) { + 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, flowtable_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; +} diff --git a/examples/nft-flowtable-get.c b/examples/nft-flowtable-get.c new file mode 100644 index 0000000..37cfadf --- /dev/null +++ b/examples/nft-flowtable-get.c @@ -0,0 +1,121 @@ +#include +#include +#include +#include + +#include +#include + +#include +#include + +static int table_cb(const struct nlmsghdr *nlh, void *data) +{ + struct nftnl_flowtable *t; + char buf[4096]; + uint32_t *type = data; + + t = nftnl_flowtable_alloc(); + if (t == NULL) { + perror("OOM"); + goto err; + } + + if (nftnl_flowtable_nlmsg_parse(nlh, t) < 0) { + perror("nftnl_flowtable_nlmsg_parse"); + goto err_free; + } + + nftnl_flowtable_snprintf(buf, sizeof(buf), t, *type, 0); + printf("%s\n", buf); + +err_free: + nftnl_flowtable_free(t); +err: + return MNL_CB_OK; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, type = NFTNL_OUTPUT_DEFAULT; + struct nftnl_flowtable *t = NULL; + int ret, family; + + seq = time(NULL); + + if (argc < 2 || argc > 5) { + fprintf(stderr, "Usage: %s [
] [json]\n", + argv[0]); + exit(EXIT_FAILURE); + } + + 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 if (strcmp(argv[1], "unspec") == 0) + family = NFPROTO_UNSPEC; + else { + fprintf(stderr, "Unknown family: ip, ip6, bridge, arp, unspec\n"); + exit(EXIT_FAILURE); + } + + if (argc >= 4) { + t = nftnl_flowtable_alloc(); + if (t == NULL) { + perror("OOM"); + exit(EXIT_FAILURE); + } + nlh = nftnl_flowtable_nlmsg_build_hdr(buf, NFT_MSG_GETFLOWTABLE, family, + NLM_F_ACK, seq); + nftnl_flowtable_set(t, NFTNL_FLOWTABLE_TABLE, argv[2]); + nftnl_flowtable_set(t, NFTNL_FLOWTABLE_NAME, argv[3]); + nftnl_flowtable_nlmsg_build_payload(nlh, t); + nftnl_flowtable_free(t); + } else if (argc >= 2) { + nlh = nftnl_flowtable_nlmsg_build_hdr(buf, NFT_MSG_GETFLOWTABLE, family, + NLM_F_DUMP, seq); + } + + if (strcmp(argv[argc-1], "json") == 0) + type = NFTNL_OUTPUT_JSON; + + 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, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + while (ret > 0) { + ret = mnl_cb_run(buf, ret, seq, portid, table_cb, &type); + 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