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authorPablo Neira Ayuso <pablo@netfilter.org>2012-05-10 10:15:09 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2012-05-26 15:29:19 +0200
commitd2e942c76f87ea061d5e8643007f1d4c3ed39694 (patch)
tree0c607e76d0f6e025a2c4de9580eb927628676c88 /src
parent867b5b6496a3296078146ba3d06616eda3b0717e (diff)
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>
Diffstat (limited to 'src')
-rw-r--r--src/Makefile.am8
-rw-r--r--src/nfct-extensions/timeout.c486
-rw-r--r--src/nfct.c116
3 files changed, 609 insertions, 1 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index 7d7b2ac..5dbdef3 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -4,11 +4,17 @@ AM_YFLAGS = -d
CLEANFILES = read_config_yy.c read_config_lex.c
-sbin_PROGRAMS = conntrack conntrackd
+sbin_PROGRAMS = conntrack conntrackd nfct
conntrack_SOURCES = conntrack.c
conntrack_LDADD = ../extensions/libct_proto_tcp.la ../extensions/libct_proto_udp.la ../extensions/libct_proto_udplite.la ../extensions/libct_proto_icmp.la ../extensions/libct_proto_icmpv6.la ../extensions/libct_proto_sctp.la ../extensions/libct_proto_dccp.la ../extensions/libct_proto_gre.la ../extensions/libct_proto_unknown.la ${LIBNETFILTER_CONNTRACK_LIBS}
+nfct_SOURCES = nfct.c \
+ nfct-extensions/timeout.c
+nfct_LDADD = ${LIBMNL_LIBS} \
+ ${LIBNETFILTER_CONNTRACK_LIBS} \
+ ${LIBNETFILTER_CTTIMEOUT_LIBS}
+
conntrackd_SOURCES = alarm.c main.c run.c hash.c queue.c rbtree.c \
local.c log.c mcast.c udp.c netlink.c vector.c \
filter.c fds.c event.c process.c origin.c date.c \
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;
+}
diff --git a/src/nfct.c b/src/nfct.c
new file mode 100644
index 0000000..db629e7
--- /dev/null
+++ b/src/nfct.c
@@ -0,0 +1,116 @@
+/*
+ * (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 int nfct_cmd_version(int argc, char *argv[]);
+static int nfct_cmd_help(int argc, char *argv[]);
+
+static void usage(char *argv[])
+{
+ fprintf(stderr, "Usage: %s subsystem command [parameters]...\n",
+ argv[0]);
+}
+
+void nfct_perror(const char *msg)
+{
+ if (errno == 0) {
+ fprintf(stderr, "nfct v%s: %s\n", VERSION, msg);
+ } else {
+ fprintf(stderr, "nfct v%s: %s: %s\n",
+ VERSION, msg, strerror(errno));
+ }
+}
+
+int main(int argc, char *argv[])
+{
+ int subsys = NFCT_SUBSYS_NONE, ret = 0;
+
+ if (argc < 2) {
+ usage(argv);
+ exit(EXIT_FAILURE);
+ }
+ if (strncmp(argv[1], "timeout", strlen(argv[1])) == 0) {
+ subsys = NFCT_SUBSYS_TIMEOUT;
+ } else if (strncmp(argv[1], "version", strlen(argv[1])) == 0)
+ subsys = NFCT_SUBSYS_VERSION;
+ else if (strncmp(argv[1], "help", strlen(argv[1])) == 0)
+ subsys = NFCT_SUBSYS_HELP;
+ else {
+ fprintf(stderr, "nfct v%s: Unknown subsystem: %s\n",
+ VERSION, argv[1]);
+ usage(argv);
+ exit(EXIT_FAILURE);
+ }
+
+ switch(subsys) {
+ case NFCT_SUBSYS_TIMEOUT:
+ ret = nfct_cmd_timeout_parse_params(argc, argv);
+ break;
+ case NFCT_SUBSYS_VERSION:
+ ret = nfct_cmd_version(argc, argv);
+ break;
+ case NFCT_SUBSYS_HELP:
+ ret = nfct_cmd_help(argc, argv);
+ break;
+ }
+ return ret < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+static const char version_msg[] =
+ "nfct v%s: utility for the Netfilter's Connection Tracking System\n"
+ "Copyright (C) 2012 Pablo Neira Ayuso <pablo@netfilter.org>\n"
+ "This program comes with ABSOLUTELY NO WARRANTY.\n"
+ "This is free software, and you are welcome to redistribute it under "
+ "certain \nconditions; see LICENSE file distributed in this package "
+ "for details.\n";
+
+static int nfct_cmd_version(int argc, char *argv[])
+{
+ printf(version_msg, VERSION);
+ return 0;
+}
+
+static const char help_msg[] =
+ "nfct v%s: utility for the Netfilter's Connection Tracking System\n"
+ "Usage: %s command [parameters]...\n\n"
+ "Subsystem:\n"
+ " timeout\t\tAllows definition of fine-grain timeout policies\n"
+ " version\t\tDisplay version and disclaimer\n"
+ " help\t\t\tDisplay this help message\n"
+ "Commands:\n"
+ " list [reset]\t\tList the accounting object table (and reset)\n"
+ " add object-name\tAdd new accounting object to table\n"
+ " delete object-name\tDelete existing accounting object\n"
+ " get object-name\tGet existing accounting object\n"
+ " flush\t\t\tFlush accounting object table\n";
+
+static int nfct_cmd_help(int argc, char *argv[])
+{
+ printf(help_msg, VERSION, argv[0]);
+ return 0;
+}