src: integrate nfct into the conntrack-tools tree

I'll need for the upcoming cthelper infrastructure. Moreover, we avoid
more fragmentation in the netfilter user-space utilities. And the plan
is that `nfct' will replace `conntrack' at some point.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 486 insertions, 0 deletions

diff --git a/src/nfct-extensions/timeout.c b/src/nfct-extensions/timeout.c
new file mode 100644
index 0000000..a69537d
--- /dev/null
+++ b/src/nfct-extensions/timeout.c
@@ -0,0 +1,486 @@
+/*
+ * (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 code has been sponsored by Vyatta Inc. <http://www.vyatta.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <netinet/in.h>
+#include <errno.h>
+
+#include <libmnl/libmnl.h>
+#include <linux/netfilter/nfnetlink_cttimeout.h>
+#include <libnetfilter_cttimeout/libnetfilter_cttimeout.h>
+
+#include "nfct.h"
+
+static void
+nfct_cmd_timeout_usage(char *argv[])
+{
+	fprintf(stderr, "nfct v%s: Missing command\n"
+			"%s timeout list|add|delete|get|flush "
+			"[parameters...]\n", VERSION, argv[0]);
+}
+
+int nfct_cmd_timeout_parse_params(int argc, char *argv[])
+{
+	int cmd = NFCT_CMD_NONE, ret = 0;
+
+	if (argc < 3) {
+		nfct_cmd_timeout_usage(argv);
+		return -1;
+	}
+	if (strncmp(argv[2], "list", strlen(argv[2])) == 0)
+		cmd = NFCT_CMD_LIST;
+	else if (strncmp(argv[2], "add", strlen(argv[2])) == 0)
+		cmd = NFCT_CMD_ADD;
+	else if (strncmp(argv[2], "delete", strlen(argv[2])) == 0)
+		cmd = NFCT_CMD_DELETE;
+	else if (strncmp(argv[2], "get", strlen(argv[2])) == 0)
+		cmd = NFCT_CMD_GET;
+	else if (strncmp(argv[2], "flush", strlen(argv[2])) == 0)
+		cmd = NFCT_CMD_FLUSH;
+	else {
+		fprintf(stderr, "nfct v%s: Unknown command: %s\n",
+			VERSION, argv[2]);
+		nfct_cmd_timeout_usage(argv);
+		return -1;
+	}
+	switch(cmd) {
+	case NFCT_CMD_LIST:
+		ret = nfct_cmd_timeout_list(argc, argv);
+		break;
+	case NFCT_CMD_ADD:
+		ret = nfct_cmd_timeout_add(argc, argv);
+		break;
+	case NFCT_CMD_DELETE:
+		ret = nfct_cmd_timeout_delete(argc, argv);
+		break;
+	case NFCT_CMD_GET:
+		ret = nfct_cmd_timeout_get(argc, argv);
+		break;
+	case NFCT_CMD_FLUSH:
+		ret = nfct_cmd_timeout_flush(argc, argv);
+		break;
+	}
+
+	return 0;
+}
+
+static int nfct_timeout_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct nfct_timeout *t;
+	char buf[4096];
+
+	t = nfct_timeout_alloc();
+	if (t == NULL) {
+		nfct_perror("OOM");
+		goto err;
+	}
+
+	if (nfct_timeout_nlmsg_parse_payload(nlh, t) < 0) {
+		nfct_perror("nfct_timeout_nlmsg_parse_payload");
+		goto err_free;
+	}
+
+	nfct_timeout_snprintf(buf, sizeof(buf), t, 0);
+	printf("%s\n", buf);
+
+err_free:
+	nfct_timeout_free(t);
+err:
+	return MNL_CB_OK;
+}
+
+int nfct_cmd_timeout_list(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	unsigned int seq, portid;
+	int ret;
+
+	if (argc > 3) {
+		nfct_perror("too many arguments");
+		return -1;
+	}
+
+	seq = time(NULL);
+	nlh = nfct_timeout_nlmsg_build_hdr(buf, IPCTNL_MSG_TIMEOUT_GET,
+						NLM_F_DUMP, seq);
+
+	nl = mnl_socket_open(NETLINK_NETFILTER);
+	if (nl == NULL) {
+		nfct_perror("mnl_socket_open");
+		return -1;
+	}
+
+	if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+		nfct_perror("mnl_socket_bind");
+		return -1;
+	}
+	portid = mnl_socket_get_portid(nl);
+
+	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+		nfct_perror("mnl_socket_send");
+		return -1;
+	}
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, seq, portid, nfct_timeout_cb, NULL);
+		if (ret <= 0)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		nfct_perror("error");
+		return -1;
+	}
+	mnl_socket_close(nl);
+
+	return 0;
+}
+
+static uint32_t nfct_timeout_attr_max[IPPROTO_MAX] = {
+	[IPPROTO_ICMP]		= NFCT_TIMEOUT_ATTR_ICMP_MAX,
+	[IPPROTO_TCP]		= NFCT_TIMEOUT_ATTR_TCP_MAX,
+	[IPPROTO_UDP]		= NFCT_TIMEOUT_ATTR_UDP_MAX,
+	[IPPROTO_UDPLITE]	= NFCT_TIMEOUT_ATTR_UDPLITE_MAX,
+	[IPPROTO_SCTP]		= NFCT_TIMEOUT_ATTR_SCTP_MAX,
+	[IPPROTO_DCCP]		= NFCT_TIMEOUT_ATTR_DCCP_MAX,
+	[IPPROTO_ICMPV6]	= NFCT_TIMEOUT_ATTR_ICMPV6_MAX,
+	[IPPROTO_GRE]		= NFCT_TIMEOUT_ATTR_GRE_MAX,
+	[IPPROTO_RAW]		= NFCT_TIMEOUT_ATTR_GENERIC_MAX,
+};
+
+int nfct_cmd_timeout_add(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	uint32_t portid, seq;
+	struct nfct_timeout *t;
+	uint16_t l3proto;
+	uint8_t l4proto;
+	int ret, i;
+	unsigned int j;
+
+	if (argc < 6) {
+		nfct_perror("missing parameters\n"
+			    "syntax: nfct timeout add name "
+			    "family protocol state1 "
+			    "timeout1 state2 timeout2...");
+		return -1;
+	}
+
+	t = nfct_timeout_alloc();
+	if (t == NULL) {
+		nfct_perror("OOM");
+		return -1;
+	}
+
+	nfct_timeout_attr_set(t, NFCT_TIMEOUT_ATTR_NAME, argv[3]);
+
+	if (strcmp(argv[4], "inet") == 0)
+		l3proto = AF_INET;
+	else if (strcmp(argv[4], "inet6") == 0)
+		l3proto = AF_INET6;
+	else {
+		nfct_perror("unknown layer 3 protocol");
+		return -1;
+	}
+	nfct_timeout_attr_set_u16(t, NFCT_TIMEOUT_ATTR_L3PROTO, l3proto);
+
+	if (strcmp(argv[5], "tcp") == 0)
+		l4proto = IPPROTO_TCP;
+	else if (strcmp(argv[5], "udp") == 0)
+		l4proto = IPPROTO_UDP;
+	else if (strcmp(argv[5], "udplite") == 0)
+		l4proto = IPPROTO_UDPLITE;
+	else if (strcmp(argv[5], "sctp") == 0)
+		l4proto = IPPROTO_SCTP;
+	else if (strcmp(argv[5], "dccp") == 0)
+		l4proto = IPPROTO_DCCP;
+	else if (strcmp(argv[5], "icmp") == 0)
+		l4proto = IPPROTO_ICMP;
+	else if (strcmp(argv[5], "icmpv6") == 0)
+		l4proto = IPPROTO_ICMPV6;
+	else if (strcmp(argv[5], "gre") == 0)
+		l4proto = IPPROTO_GRE;
+	else if (strcmp(argv[5], "generic") == 0)
+		l4proto = IPPROTO_RAW;
+	else {
+		nfct_perror("unknown layer 4 protocol");
+		return -1;
+	}
+	nfct_timeout_attr_set_u8(t, NFCT_TIMEOUT_ATTR_L4PROTO, l4proto);
+
+	for (i=6; i<argc; i+=2) {
+		int matching = -1;
+
+		for (j=0; j<nfct_timeout_attr_max[l4proto]; j++) {
+			const char *state_name;
+
+			state_name =
+				nfct_timeout_policy_attr_to_name(l4proto, j);
+			if (state_name == NULL) {
+				nfct_perror("state name is NULL");
+				return -1;
+			}
+			if (strcasecmp(argv[i], state_name) != 0)
+				continue;
+
+			matching = j;
+			break;
+		}
+		if (matching != -1) {
+			if (i+1 >= argc) {
+				nfct_perror("missing value for this timeout");
+				return -1;
+			}
+			nfct_timeout_policy_attr_set_u32(t, matching,
+							 atoi(argv[i+1]));
+			matching = -1;
+		} else {
+			fprintf(stderr, "nfct v%s: Wrong state name: `%s' "
+					"for protocol `%s'\n",
+					VERSION, argv[i], argv[5]);
+			return -1;
+		}
+	}
+
+	seq = time(NULL);
+	nlh = nfct_timeout_nlmsg_build_hdr(buf, IPCTNL_MSG_TIMEOUT_NEW,
+				     NLM_F_CREATE | NLM_F_ACK, seq);
+	nfct_timeout_nlmsg_build_payload(nlh, t);
+
+	nfct_timeout_free(t);
+
+	nl = mnl_socket_open(NETLINK_NETFILTER);
+	if (nl == NULL) {
+		nfct_perror("mnl_socket_open");
+		return -1;
+	}
+
+	if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+		nfct_perror("mnl_socket_bind");
+		return -1;
+	}
+	portid = mnl_socket_get_portid(nl);
+
+	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+		nfct_perror("mnl_socket_send");
+		return -1;
+	}
+
+	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) {
+		nfct_perror("error");
+		return -1;
+	}
+	mnl_socket_close(nl);
+
+	return 0;
+}
+
+int nfct_cmd_timeout_delete(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	uint32_t portid, seq;
+	struct nfct_timeout *t;
+	int ret;
+
+	if (argc < 4) {
+		nfct_perror("missing timeout policy name");
+		return -1;
+	} else if (argc > 4) {
+		nfct_perror("too many arguments");
+		return -1;
+	}
+
+	t = nfct_timeout_alloc();
+	if (t == NULL) {
+		nfct_perror("OOM");
+		return -1;
+	}
+
+	nfct_timeout_attr_set(t, NFCT_TIMEOUT_ATTR_NAME, argv[3]);
+
+	seq = time(NULL);
+	nlh = nfct_timeout_nlmsg_build_hdr(buf, IPCTNL_MSG_TIMEOUT_DELETE,
+				     NLM_F_ACK, seq);
+	nfct_timeout_nlmsg_build_payload(nlh, t);
+
+	nfct_timeout_free(t);
+
+	nl = mnl_socket_open(NETLINK_NETFILTER);
+	if (nl == NULL) {
+		nfct_perror("mnl_socket_open");
+		return -1;
+	}
+
+	if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+		nfct_perror("mnl_socket_bind");
+		return -1;
+	}
+	portid = mnl_socket_get_portid(nl);
+
+	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+		nfct_perror("mnl_socket_send");
+		return -1;
+	}
+
+	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) {
+		nfct_perror("error");
+		return -1;
+	}
+
+	mnl_socket_close(nl);
+
+	return 0;
+}
+
+int nfct_cmd_timeout_get(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	uint32_t portid, seq;
+	struct nfct_timeout *t;
+	int ret;
+
+	if (argc < 4) {
+		nfct_perror("missing timeout policy name");
+		return -1;
+	} else if (argc > 4) {
+		nfct_perror("too many arguments");
+		return -1;
+	}
+
+	t = nfct_timeout_alloc();
+	if (t == NULL) {
+		nfct_perror("OOM");
+		return -1;
+	}
+	nfct_timeout_attr_set(t, NFCT_TIMEOUT_ATTR_NAME, argv[3]);
+
+	seq = time(NULL);
+	nlh = nfct_timeout_nlmsg_build_hdr(buf, IPCTNL_MSG_TIMEOUT_GET,
+				     NLM_F_ACK, seq);
+
+	nfct_timeout_nlmsg_build_payload(nlh, t);
+
+	nfct_timeout_free(t);
+
+	nl = mnl_socket_open(NETLINK_NETFILTER);
+	if (nl == NULL) {
+		nfct_perror("mnl_socket_open");
+		return -1;
+	}
+
+	if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+		nfct_perror("mnl_socket_bind");
+		return -1;
+	}
+	portid = mnl_socket_get_portid(nl);
+
+	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+		nfct_perror("mnl_socket_send");
+		return -1;
+	}
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, seq, portid, nfct_timeout_cb, NULL);
+		if (ret <= 0)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		nfct_perror("error");
+		return -1;
+	}
+	mnl_socket_close(nl);
+
+	return 0;
+}
+
+int nfct_cmd_timeout_flush(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	uint32_t portid, seq;
+	int ret;
+
+	if (argc > 3) {
+		nfct_perror("too many arguments");
+		return -1;
+	}
+
+	seq = time(NULL);
+	nlh = nfct_timeout_nlmsg_build_hdr(buf, IPCTNL_MSG_TIMEOUT_DELETE,
+					   NLM_F_ACK, seq);
+
+	nl = mnl_socket_open(NETLINK_NETFILTER);
+	if (nl == NULL) {
+		nfct_perror("mnl_socket_open");
+		return -1;
+	}
+
+	if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+		nfct_perror("mnl_socket_bind");
+		return -1;
+	}
+	portid = mnl_socket_get_portid(nl);
+
+	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+		nfct_perror("mnl_socket_send");
+		return -1;
+	}
+
+	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) {
+		nfct_perror("error");
+		return -1;
+	}
+
+	mnl_socket_close(nl);
+
+	return 0;
+}