Adding upstream version 1.2.6.upstream/1.2.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 268 insertions, 0 deletions

diff --git a/examples/nft-events.c b/examples/nft-events.c
new file mode 100644
index 0000000..8aab90a
--- /dev/null
+++ b/examples/nft-events.c
@@ -0,0 +1,268 @@
+/*
+ * (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/nfnetlink.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/table.h>
+#include <libnftnl/chain.h>
+#include <libnftnl/rule.h>
+#include <libnftnl/set.h>
+#include <libnftnl/gen.h>
+#include <libnftnl/common.h>
+
+static uint32_t event2flag(uint32_t event)
+{
+	switch (event) {
+	case NFT_MSG_NEWTABLE:
+	case NFT_MSG_NEWCHAIN:
+	case NFT_MSG_NEWRULE:
+	case NFT_MSG_NEWSET:
+	case NFT_MSG_NEWSETELEM:
+	case NFT_MSG_NEWGEN:
+		return NFTNL_OF_EVENT_NEW;
+	case NFT_MSG_DELTABLE:
+	case NFT_MSG_DELCHAIN:
+	case NFT_MSG_DELRULE:
+	case NFT_MSG_DELSET:
+	case NFT_MSG_DELSETELEM:
+		return NFTNL_OF_EVENT_DEL;
+	}
+
+	return 0;
+}
+
+static int table_cb(const struct nlmsghdr *nlh, int event, int type)
+{
+	struct nftnl_table *t;
+
+	t = nftnl_table_alloc();
+	if (t == NULL) {
+		perror("OOM");
+		goto err;
+	}
+
+	if (nftnl_table_nlmsg_parse(nlh, t) < 0) {
+		perror("nftnl_table_nlmsg_parse");
+		goto err_free;
+	}
+
+	nftnl_table_fprintf(stdout, t, type, event2flag(event));
+	fprintf(stdout, "\n");
+
+err_free:
+	nftnl_table_free(t);
+err:
+	return MNL_CB_OK;
+}
+
+static int rule_cb(const struct nlmsghdr *nlh, int event, int type)
+{
+	struct nftnl_rule *t;
+
+	t = nftnl_rule_alloc();
+	if (t == NULL) {
+		perror("OOM");
+		goto err;
+	}
+
+	if (nftnl_rule_nlmsg_parse(nlh, t) < 0) {
+		perror("nftnl_rule_nlmsg_parse");
+		goto err_free;
+	}
+
+	nftnl_rule_fprintf(stdout, t, type, event2flag(event));
+	fprintf(stdout, "\n");
+
+err_free:
+	nftnl_rule_free(t);
+err:
+	return MNL_CB_OK;
+}
+
+static int chain_cb(const struct nlmsghdr *nlh, int event, int type)
+{
+	struct nftnl_chain *t;
+
+	t = nftnl_chain_alloc();
+	if (t == NULL) {
+		perror("OOM");
+		goto err;
+	}
+
+	if (nftnl_chain_nlmsg_parse(nlh, t) < 0) {
+		perror("nftnl_chain_nlmsg_parse");
+		goto err_free;
+	}
+
+	nftnl_chain_fprintf(stdout, t, type, event2flag(event));
+	fprintf(stdout, "\n");
+
+err_free:
+	nftnl_chain_free(t);
+err:
+	return MNL_CB_OK;
+}
+
+static int set_cb(const struct nlmsghdr *nlh, int event, int type)
+{
+	struct nftnl_set *t;
+
+	t = nftnl_set_alloc();
+	if (t == NULL) {
+		perror("OOM");
+		goto err;
+	}
+
+	if (nftnl_set_nlmsg_parse(nlh, t) < 0) {
+		perror("nftnl_set_nlmsg_parse");
+		goto err_free;
+	}
+
+	nftnl_set_fprintf(stdout, t, type, event2flag(event));
+	fprintf(stdout, "\n");
+
+err_free:
+	nftnl_set_free(t);
+err:
+	return MNL_CB_OK;
+}
+
+static int setelem_cb(const struct nlmsghdr *nlh, int event, int type)
+{
+
+	struct nftnl_set *s;
+
+	s = nftnl_set_alloc();
+	if (s == NULL) {
+		perror("OOM");
+		goto err;
+	}
+
+	if (nftnl_set_elems_nlmsg_parse(nlh, s) < 0) {
+		perror("nftnl_set_nlmsg_parse");
+		goto err_free;
+	}
+
+	nftnl_set_fprintf(stdout, s, type, event2flag(event));
+	fprintf(stdout, "\n");
+
+err_free:
+	nftnl_set_free(s);
+err:
+	return MNL_CB_OK;
+}
+
+static int gen_cb(const struct nlmsghdr *nlh, int event, int type)
+{
+	struct nftnl_gen *gen;
+
+	gen = nftnl_gen_alloc();
+	if (gen == NULL) {
+		perror("OOM");
+		goto err;
+	}
+
+	if (nftnl_gen_nlmsg_parse(nlh, gen) < 0) {
+		perror("nftnl_gen_parse");
+		goto err_free;
+	}
+
+	nftnl_gen_fprintf(stdout, gen, type, event2flag(event));
+	fprintf(stdout, "\n");
+err_free:
+	nftnl_gen_free(gen);
+err:
+	return MNL_CB_OK;
+}
+
+static int events_cb(const struct nlmsghdr *nlh, void *data)
+{
+	int ret = MNL_CB_OK;
+	int event = NFNL_MSG_TYPE(nlh->nlmsg_type);
+	int type = *((int *)data);
+
+	switch(event) {
+	case NFT_MSG_NEWTABLE:
+	case NFT_MSG_DELTABLE:
+		ret = table_cb(nlh, event, type);
+		break;
+	case NFT_MSG_NEWCHAIN:
+	case NFT_MSG_DELCHAIN:
+		ret = chain_cb(nlh, event, type);
+		break;
+	case NFT_MSG_NEWRULE:
+	case NFT_MSG_DELRULE:
+		ret = rule_cb(nlh, event, type);
+		break;
+	case NFT_MSG_NEWSET:
+	case NFT_MSG_DELSET:
+		ret = set_cb(nlh, event, type);
+		break;
+	case NFT_MSG_NEWSETELEM:
+	case NFT_MSG_DELSETELEM:
+		ret = setelem_cb(nlh, event, type);
+		break;
+	case NFT_MSG_NEWGEN:
+		ret = gen_cb(nlh, event, type);
+		break;
+	}
+
+	return ret;
+}
+
+int main(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	int ret, type;
+
+	switch (argc) {
+	case 1:
+		type = NFTNL_OUTPUT_DEFAULT;
+		break;
+	default:
+		fprintf(stderr, "%s\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	nl = mnl_socket_open(NETLINK_NETFILTER);
+	if (nl == NULL) {
+		perror("mnl_socket_open");
+		exit(EXIT_FAILURE);
+	}
+
+	if (mnl_socket_bind(nl, (1 << (NFNLGRP_NFTABLES-1)), MNL_SOCKET_AUTOPID) < 0) {
+		perror("mnl_socket_bind");
+		exit(EXIT_FAILURE);
+	}
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, 0, 0, events_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;
+}