nft-ct-helper-{add,get,del}: add, get, or delete ct helper objects from the specified table.
Examples:
% ./nft-ct-helper-get ip filter
<nothing>
% ./nft-ct-helper-add ip filter sip-5060 sip udp
% ./nft-ct-helper-get ip filter
table filter name sip-5060 use 0 [ ct_helper name sip family 2 protocol 17 ]
% ./nft-ct-helper-del ip filter sip-5060
% ./nft-ct-helper-get ip filter
<nothing>
Signed-off-by: Yang Zheng <tomsun.0.7@xxxxxxxxx>
---
examples/Makefile.am | 14 +++-
examples/nft-ct-helper-add.c | 149 ++++++++++++++++++++++++++++++++++++++++++
examples/nft-ct-helper-del.c | 124 +++++++++++++++++++++++++++++++++++
examples/nft-ct-helper-get.c | 150 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 436 insertions(+), 1 deletion(-)
create mode 100644 examples/nft-ct-helper-add.c
create mode 100644 examples/nft-ct-helper-del.c
create mode 100644 examples/nft-ct-helper-get.c
diff --git a/examples/Makefile.am b/examples/Makefile.am
index c0d84eb..96112e7 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -30,7 +30,10 @@ check_PROGRAMS = nft-table-add \
nft-flowtable-get \
nft-ruleset-get \
nft-ruleset-parse-file \
- nft-compat-get
+ nft-compat-get \
+ nft-ct-helper-add \
+ nft-ct-helper-get \
+ nft-ct-helper-del
nft_table_add_SOURCES = nft-table-add.c
nft_table_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
@@ -124,3 +127,12 @@ nft_ruleset_parse_file_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
nft_compat_get_SOURCES = nft-compat-get.c
nft_compat_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
+
+nft_ct_helper_add_SOURCES = nft-ct-helper-add.c
+nft_ct_helper_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
+
+nft_ct_helper_get_SOURCES = nft-ct-helper-get.c
+nft_ct_helper_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
+
+nft_ct_helper_del_SOURCES = nft-ct-helper-del.c
+nft_ct_helper_del_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
diff --git a/examples/nft-ct-helper-add.c b/examples/nft-ct-helper-add.c
new file mode 100644
index 0000000..397443b
--- /dev/null
+++ b/examples/nft-ct-helper-add.c
@@ -0,0 +1,149 @@
+/*
+ * (C) 2012-2016 by Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
+ *
+ * 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 <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <netinet/in.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+
+static uint16_t parse_family(char *str, const char *option)
+{
+ if (strcmp(str, "ip") == 0)
+ return NFPROTO_IPV4;
+ else if (strcmp(str, "ip6") == 0)
+ return NFPROTO_IPV6;
+ else if (strcmp(str, "inet") == 0)
+ return NFPROTO_INET;
+ else {
+ fprintf(stderr, "Unknown %s: ip, ip6, inet\n", option);
+ exit(EXIT_FAILURE);
+ }
+}
+
+static uint8_t parse_l4proto(char *str)
+{
+ if (strcmp(str, "udp") == 0)
+ return IPPROTO_UDP;
+ else if (strcmp(str, "tcp") == 0)
+ return IPPROTO_TCP;
+ else {
+ fprintf(stderr, "Unknown l4proto: tcp, udp\n");
+ exit(EXIT_FAILURE);
+ }
+ return IPPROTO_TCP;
+}
+
+static struct nftnl_obj *ct_helper_add_parse(int argc, char *argv[])
+{
+ struct nftnl_obj *t;
+ uint16_t family, l3proto;
+ uint8_t l4proto;
+
+ t = nftnl_obj_alloc();
+ if (t == NULL) {
+ perror("OOM");
+ return NULL;
+ }
+
+ family = parse_family(argv[1], "family");
+ nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family);
+ nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER);
+ nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]);
+ nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]);
+
+ nftnl_obj_set_str(t, NFTNL_OBJ_CT_HELPER_NAME, argv[4]);
+ l4proto = parse_l4proto(argv[5]);
+ nftnl_obj_set_u8(t, NFTNL_OBJ_CT_HELPER_L4PROTO, l4proto);
+ if (argc == 7) {
+ l3proto = parse_family(argv[6], "l3proto");
+ nftnl_obj_set_u16(t, NFTNL_OBJ_CT_HELPER_L3PROTO, l3proto);
+ }
+
+ return t;
+}
+
+int main(int argc, char *argv[])
+{
+ struct nftnl_obj *t;
+ uint32_t seq, obj_seq, family, portid;
+ struct mnl_nlmsg_batch *batch;
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ struct nlmsghdr *nlh;
+ struct mnl_socket *nl;
+ int ret;
+
+ if (argc < 6) {
+ fprintf(stderr, "%s <family> <table> <name> <type> <l4proto> [l3proto]\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ t = ct_helper_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_CREATE | 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;
+}
diff --git a/examples/nft-ct-helper-del.c b/examples/nft-ct-helper-del.c
new file mode 100644
index 0000000..fda3026
--- /dev/null
+++ b/examples/nft-ct-helper-del.c
@@ -0,0 +1,124 @@
+/*
+ * (C) 2012 by Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
+ */
+
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+
+static struct nftnl_obj *ct_helper_del_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], "inet") == 0)
+ family = NFPROTO_INET;
+ else {
+ fprintf(stderr, "Unknown family: ip, ip6, inet\n");
+ return NULL;
+ }
+
+ t = nftnl_obj_alloc();
+ if (t == NULL) {
+ perror("OOM");
+ return NULL;
+ }
+
+ nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]);
+ nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]);
+ nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER);
+ nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family);
+
+ 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 <family> <table> <name>\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ t = ct_helper_del_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_DELOBJ, family, NLM_F_ACK,
+ seq++);
+ nftnl_obj_nlmsg_build_payload(nlh, t);
+ mnl_nlmsg_batch_next(batch);
+ nftnl_obj_free(t);
+
+ 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;
+}
diff --git a/examples/nft-ct-helper-get.c b/examples/nft-ct-helper-get.c
new file mode 100644
index 0000000..94bd0cd
--- /dev/null
+++ b/examples/nft-ct-helper-get.c
@@ -0,0 +1,150 @@
+/*
+ * (C) 2012 by Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
+ */
+
+
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+
+static int obj_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct nftnl_obj *t;
+ char buf[4096];
+ uint32_t *type = data;
+
+ t = nftnl_obj_alloc();
+ if (t == NULL) {
+ perror("OOM");
+ goto err;
+ }
+
+ if (nftnl_obj_nlmsg_parse(nlh, t) < 0) {
+ perror("nftnl_obj_nlmsg_parse");
+ goto err_free;
+ }
+
+ nftnl_obj_snprintf(buf, sizeof(buf), t, *type, 0);
+ printf("%s\n", buf);
+
+err_free:
+ nftnl_obj_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, family;
+ struct nftnl_obj *t = NULL;
+ int ret;
+ uint32_t type = NFTNL_OUTPUT_DEFAULT;
+
+ if (argc < 3 || argc > 5) {
+ fprintf(stderr, "%s <family> <table> [<obj>] [<default|xml|json>]\n",
+ argv[0]);
+ return 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], "inet") == 0)
+ family = NFPROTO_INET;
+ else if (strcmp(argv[1], "unspec") == 0)
+ family = NFPROTO_UNSPEC;
+ else {
+ fprintf(stderr, "Unknown family: ip, ip6, inet, unspec");
+ exit(EXIT_FAILURE);
+ }
+
+ if (strcmp(argv[argc-1], "xml") == 0) {
+ type = NFTNL_OUTPUT_XML;
+ argv[argc-1] = NULL;
+ argc--;
+ }else if (strcmp(argv[argc-1], "json") == 0) {
+ type = NFTNL_OUTPUT_JSON;
+ argv[argc-1] = NULL;
+ argc--;
+ } else if (strcmp(argv[argc - 1], "default") == 0) {
+ argc--;
+ }
+
+ if (argc == 3 || argc == 4) {
+ t = nftnl_obj_alloc();
+ if (t == NULL) {
+ perror("OOM");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ seq = time(NULL);
+ nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER);
+ if (argc < 4) {
+ nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETOBJ, family,
+ NLM_F_DUMP, seq);
+ if (argc == 3) {
+ nftnl_obj_set(t, NFTNL_OBJ_TABLE, argv[2]);
+ nftnl_obj_nlmsg_build_payload(nlh, t);
+ nftnl_obj_free(t);
+ }
+ } else {
+ nftnl_obj_set(t, NFTNL_OBJ_TABLE, argv[2]);
+ nftnl_obj_set(t, NFTNL_OBJ_NAME, argv[3]);
+
+ nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETOBJ, family,
+ NLM_F_ACK, seq);
+ nftnl_obj_nlmsg_build_payload(nlh, t);
+ nftnl_obj_free(t);
+ }
+
+ 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, obj_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;
+}
--
2.16.2
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
