[libnftnl,v5,2/3] examples: add nft-ct-timeout-{add,del,get}

Message ID 20180809193315.13764-1-harshasharmaiitr@gmail.com
State Changes Requested
Delegated to: Pablo Neira
Headers show
Series
  • [libnftnl,v5,1/3] src: add ct timeout support
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Commit Message

Harsha Sharma Aug. 9, 2018, 7:33 p.m.
Add, list and delete ct timeout objects from specified table

Usage e.g.:
% ./nft-ct-timeout-add ip filter some-name tcp
% ./nft-ct-timeout-get ip filter
table filter name some-name use 0 [ ct_timeout family 2 protocol 6
policy = {ESTABLISHED = 111,CLOSE_WAIT = 14, CLOSE = 16}]

% ./nft-ct-timeout-del ip filter some-name

Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
---
Changes in v5:
 - remove nftnl_timeout_policy_attr_set_u32 and use nftnl_obj_set
Changes in v4:
 - No changes
Changes in v3:
 - Change log message with update listing of timeout policies
Changes in v2:
 - Updated timeout policy values

 examples/Makefile.am          |  12 ++++
 examples/nft-ct-timeout-add.c | 151 ++++++++++++++++++++++++++++++++++++++++++
 examples/nft-ct-timeout-del.c | 124 ++++++++++++++++++++++++++++++++++
 examples/nft-ct-timeout-get.c | 150 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 437 insertions(+)
 create mode 100644 examples/nft-ct-timeout-add.c
 create mode 100644 examples/nft-ct-timeout-del.c
 create mode 100644 examples/nft-ct-timeout-get.c

Patch

diff --git a/examples/Makefile.am b/examples/Makefile.am
index 3ec699b..d5584e5 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-ct-timeout-add	\
+		 nft-ct-timeout-get	\
+		 nft-ct-timeout-del	\
 		 nft-flowtable-add	\
 		 nft-flowtable-del	\
 		 nft-flowtable-get	\
@@ -111,6 +114,15 @@  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_ct_timeout_add_SOURCES = nft-ct-timeout-add.c
+nft_ct_timeout_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
+
+nft_ct_timeout_get_SOURCES = nft-ct-timeout-get.c
+nft_ct_timeout_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
+
+nft_ct_timeout_del_SOURCES = nft-ct-timeout-del.c
+nft_ct_timeout_del_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
+
 nft_flowtable_add_SOURCES = nft-flowtable-add.c
 nft_flowtable_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS}
 
diff --git a/examples/nft-ct-timeout-add.c b/examples/nft-ct-timeout-add.c
new file mode 100644
index 0000000..6727913
--- /dev/null
+++ b/examples/nft-ct-timeout-add.c
@@ -0,0 +1,151 @@ 
+/*
+ * (C) 2012-2016 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * 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 <time.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <obj.h>
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+#include <libnftnl/cttimeout.h>
+
+static struct nftnl_obj *obj_add_parse(int argc, char *argv[])
+{
+	size_t timeout_array_size;
+	struct nftnl_obj *t;
+	uint32_t *timeout;
+	uint16_t family;
+	uint8_t l4proto;
+
+	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;
+	}
+
+	if (strcmp(argv[4], "udp") == 0)
+		l4proto = IPPROTO_UDP;
+	else if (strcmp(argv[4], "tcp") == 0)
+		l4proto = IPPROTO_TCP;
+	else {
+		fprintf(stderr, "Unknown layer 4 protocol\n");
+		return NULL;
+	}
+
+	t = nftnl_obj_alloc();
+	if (t == NULL) {
+		perror("OOM");
+		return NULL;
+	}
+
+	timeout_array_size = sizeof(uint32_t) * (NFTNL_CTTIMEOUT_TCP_MAX);
+	timeout = calloc(1, timeout_array_size);
+	if (timeout == NULL) {
+		perror("OOM");
+		return NULL;
+	}
+
+	timeout[NFTNL_CTTIMEOUT_TCP_ESTABLISHED] = 111;
+	timeout[NFTNL_CTTIMEOUT_TCP_CLOSE] = 16;
+	timeout[NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT] = 14;
+	nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family);
+	nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_TIMEOUT);
+	nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]);
+	nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]);
+	nftnl_obj_set_u8(t, NFTNL_OBJ_CT_TIMEOUT_L4PROTO, l4proto);
+	nftnl_obj_set_u16(t, NFTNL_OBJ_CT_TIMEOUT_L3PROTO, NFPROTO_IPV4);
+	nftnl_obj_set(t, NFTNL_OBJ_CT_TIMEOUT_DATA, timeout);
+	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 != 5) {
+		fprintf(stderr, "%s <family> <table> <name> <protocol> \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 | NLM_F_CREATE, 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-timeout-del.c b/examples/nft-ct-timeout-del.c
new file mode 100644
index 0000000..4581c39
--- /dev/null
+++ b/examples/nft-ct-timeout-del.c
@@ -0,0 +1,124 @@ 
+/*
+ * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * 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_timeout_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_TIMEOUT);
+	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_timeout_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-timeout-get.c b/examples/nft-ct-timeout-get.c
new file mode 100644
index 0000000..503c488
--- /dev/null
+++ b/examples/nft-ct-timeout-get.c
@@ -0,0 +1,150 @@ 
+/*
+ * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * 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_TIMEOUT);
+	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;
+}