From: Álvaro Neira Ayuso <alvaroneay@xxxxxxxxx>
Merged the example for inserting rules and fixed for using
the correct header.
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@xxxxxxxxx>
---
v2: Fixed some style error, removed useless code lines and used the correct function
for setting an attribute.
examples/Makefile.am | 1
examples/nft-rule-add.c | 15 +++
examples/nft-rule-insert.c | 204 --------------------------------------------
3 files changed, 12 insertions(+), 208 deletions(-)
delete mode 100644 examples/nft-rule-insert.c
diff --git a/examples/Makefile.am b/examples/Makefile.am
index b433b2d..54b1dfb 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -12,7 +12,6 @@ check_PROGRAMS = nft-table-add \
nft-chain-del \
nft-chain-get \
nft-rule-add \
- nft-rule-insert \
nft-rule-xml-add \
nft-rule-json-add \
nft-rule-del \
diff --git a/examples/nft-rule-add.c b/examples/nft-rule-add.c
index 21b3bf8..6961d0d 100644
--- a/examples/nft-rule-add.c
+++ b/examples/nft-rule-add.c
@@ -80,11 +80,12 @@ static void add_counter(struct nft_rule *r)
}
static struct nft_rule *setup_rule(uint8_t family, const char *table,
- const char *chain)
+ const char *chain, const char *handle)
{
struct nft_rule *r = NULL;
uint8_t proto;
uint16_t dport;
+ uint64_t handle_num;
r = nft_rule_alloc();
if (r == NULL) {
@@ -96,6 +97,11 @@ static struct nft_rule *setup_rule(uint8_t family, const char *table,
nft_rule_attr_set(r, NFT_RULE_ATTR_CHAIN, chain);
nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FAMILY, family);
+ if (handle != NULL) {
+ handle_num = atoll(handle);
+ nft_rule_attr_set_u64(r, NFT_RULE_ATTR_POSITION, handle_num);
+ }
+
proto = IPPROTO_TCP;
add_payload(r, NFT_PAYLOAD_NETWORK_HEADER, NFT_REG_1,
offsetof(struct iphdr, protocol), sizeof(uint8_t));
@@ -138,7 +144,7 @@ int main(int argc, char *argv[])
uint32_t seq = time(NULL);
int ret;
- if (argc != 4) {
+ if (argc < 4 || argc > 5) {
fprintf(stderr, "Usage: %s <family> <table> <chain>\n", argv[0]);
exit(EXIT_FAILURE);
}
@@ -152,7 +158,10 @@ int main(int argc, char *argv[])
exit(EXIT_FAILURE);
}
- r = setup_rule(family, argv[2], argv[3]);
+ if (argc != 5)
+ r = setup_rule(family, argv[2], argv[3], NULL);
+ else
+ r = setup_rule(family, argv[2], argv[3], argv[4]);
nl = mnl_socket_open(NETLINK_NETFILTER);
if (nl == NULL) {
diff --git a/examples/nft-rule-insert.c b/examples/nft-rule-insert.c
deleted file mode 100644
index 1b377de..0000000
--- a/examples/nft-rule-insert.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * (C) 2012 by Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
- * (C) 2013 by Eric Leblond <eric@xxxxxxxxx>
- *
- * 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 <stddef.h> /* for offsetof */
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-#include <linux/netfilter/nf_tables.h>
-
-#include <libmnl/libmnl.h>
-#include <libnftnl/rule.h>
-#include <libnftnl/expr.h>
-
-#include <linux/netfilter_ipv4/ipt_LOG.h>
-#include <linux/netfilter/xt_iprange.h>
-
-#include <netinet/ip.h>
-
-static void add_target_log(struct nft_rule_expr *e)
-{
- struct ipt_log_info *info;
-
- nft_rule_expr_set(e, NFT_EXPR_TG_NAME, "LOG", strlen("LOG"));
- nft_rule_expr_set_u32(e, NFT_EXPR_TG_REV, 0);
-
- info = calloc(1, sizeof(struct ipt_log_info));
- if (info == NULL)
- return;
-
- sprintf(info->prefix, "test: ");
- info->prefix[sizeof(info->prefix)-1] = '\0';
- info->logflags = 0x0f;
- info->level = 5;
-
- nft_rule_expr_set(e, NFT_EXPR_TG_INFO, info, sizeof(*info));
-}
-
-static void add_expr_target(struct nft_rule *r)
-{
- struct nft_rule_expr *expr;
-
- expr = nft_rule_expr_alloc("target");
- if (expr == NULL)
- return;
-
- add_target_log(expr);
-
- nft_rule_add_expr(r, expr);
-}
-
-static void add_match_iprange(struct nft_rule_expr *e)
-{
- struct xt_iprange_mtinfo *info;
-
- nft_rule_expr_set(e, NFT_EXPR_MT_NAME, "iprange", strlen("iprange"));
- nft_rule_expr_set_u32(e, NFT_EXPR_MT_REV, 1);
-
- info = calloc(1, sizeof(struct xt_iprange_mtinfo));
- if (info == NULL)
- return;
-
- info->src_min.ip = info->dst_min.ip = inet_addr("127.0.0.1");
- info->src_max.ip = info->dst_max.ip = inet_addr("127.0.0.1");
- info->flags = IPRANGE_SRC;
-
- nft_rule_expr_set(e, NFT_EXPR_MT_INFO, info, sizeof(*info));
-}
-
-static void add_expr_match(struct nft_rule *r)
-{
- struct nft_rule_expr *expr;
-
- expr = nft_rule_expr_alloc("match");
- if (expr == NULL)
- return;
-
- add_match_iprange(expr);
-
- nft_rule_add_expr(r, expr);
-}
-
-#define field_sizeof(t, f) (sizeof(((t *)NULL)->f))
-
-static void add_payload2(struct nft_rule_expr *e)
-{
- nft_rule_expr_set_u32(e, NFT_EXPR_PAYLOAD_BASE,
- NFT_PAYLOAD_NETWORK_HEADER);
- nft_rule_expr_set_u32(e, NFT_EXPR_PAYLOAD_DREG, NFT_REG_1);
- nft_rule_expr_set_u32(e, NFT_EXPR_PAYLOAD_OFFSET,
- offsetof(struct iphdr, protocol));
- nft_rule_expr_set_u32(e, NFT_EXPR_PAYLOAD_LEN, 1);
-}
-
-static void add_payload(struct nft_rule *r)
-{
- struct nft_rule_expr *expr;
-
- expr = nft_rule_expr_alloc("payload");
- if (expr == NULL)
- return;
-
- add_payload2(expr);
-
- nft_rule_add_expr(r, expr);
-}
-
-int main(int argc, char *argv[])
-{
- struct mnl_socket *nl;
- char buf[MNL_SOCKET_BUFFER_SIZE];
- struct nlmsghdr *nlh;
- uint32_t portid, seq;
- struct nft_rule *r = NULL;
- int ret, family;
- uint64_t handle;
-
- if (argc != 5) {
- fprintf(stderr, "Usage: %s <family> <table> <chain> <handle>\n",
- argv[0]);
- exit(EXIT_FAILURE);
- }
-
- r = nft_rule_alloc();
- if (r == NULL) {
- perror("OOM");
- exit(EXIT_FAILURE);
- }
-
- if (strcmp(argv[1], "ip") == 0)
- family = AF_INET;
- else if (strcmp(argv[1], "ip6") == 0)
- family = AF_INET6;
- else if (strcmp(argv[1], "bridge") == 0)
- family = AF_BRIDGE;
- else {
- fprintf(stderr, "Unknown family: ip, ip6, bridge\n");
- exit(EXIT_FAILURE);
- }
-
- nft_rule_attr_set(r, NFT_RULE_ATTR_TABLE, argv[2]);
- nft_rule_attr_set(r, NFT_RULE_ATTR_CHAIN, argv[3]);
-
- handle = atoi(argv[4]);
- nft_rule_attr_set(r, NFT_RULE_ATTR_POSITION, &handle);
-
- add_expr_match(r);
- add_payload(r);
- add_expr_target(r);
-
- char tmp[1024];
- nft_rule_snprintf(tmp, sizeof(tmp), r, 0, 0);
- printf("%s\n", tmp);
-
- seq = time(NULL);
- nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, family,
- NLM_F_ACK|NLM_F_CREATE,
- seq);
- nft_rule_nlmsg_build_payload(nlh, r);
- nft_rule_free(r);
-
- 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, 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;
-}
--
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