Add support for ct timeout objects, used to assign connection tracking
timeout policies.

Signed-off-by: Harsha Sharma <harshasharmai...@gmail.com>
---
Changes in v6:
 - Remove includes from header file which are not required
 - other minor changes
Changes in v5:
 - Remove nftnl_timeout_policy_attr_set_u32
 - remove NFTNL_OBJ_CT_TIMEOUT_POLICY
 - remove nftnl_obj_get_void
 - minor changes
Changes in v4:
 - updated include/linux/netfilter/nf_tables.h
Changes in v3:
 - minor changes updated with nft patch
Changes in v2:
 - minor changes

 include/libnftnl/Makefile.am        |   3 +-
 include/libnftnl/cttimeout.h        |  33 ++++
 include/libnftnl/object.h           |   6 +
 include/linux/netfilter/nf_tables.h |  14 +-
 include/obj.h                       |   6 +
 src/Makefile.am                     |   1 +
 src/obj/ct_timeout.c                | 368 ++++++++++++++++++++++++++++++++++++
 src/object.c                        |   1 +
 8 files changed, 430 insertions(+), 2 deletions(-)
 create mode 100644 include/libnftnl/cttimeout.h
 create mode 100644 src/obj/ct_timeout.c

diff --git a/include/libnftnl/Makefile.am b/include/libnftnl/Makefile.am
index d846a57..a94f414 100644
--- a/include/libnftnl/Makefile.am
+++ b/include/libnftnl/Makefile.am
@@ -10,4 +10,5 @@ pkginclude_HEADERS = batch.h          \
                     ruleset.h          \
                     common.h           \
                     udata.h            \
-                    gen.h
+                    gen.h              \
+                    cttimeout.h
diff --git a/include/libnftnl/cttimeout.h b/include/libnftnl/cttimeout.h
new file mode 100644
index 0000000..b417270
--- /dev/null
+++ b/include/libnftnl/cttimeout.h
@@ -0,0 +1,33 @@
+#ifndef _LIBNETFILTER_CTTIMEOUT_H_
+#define _LIBNETFILTER_CTTIMEOUT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum nftnl_cttimeout_tcp {
+       NFTNL_CTTIMEOUT_TCP_SYN_SENT = 0,
+       NFTNL_CTTIMEOUT_TCP_SYN_RECV,
+       NFTNL_CTTIMEOUT_TCP_ESTABLISHED,
+       NFTNL_CTTIMEOUT_TCP_FIN_WAIT,
+       NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT,
+       NFTNL_CTTIMEOUT_TCP_LAST_ACK,
+       NFTNL_CTTIMEOUT_TCP_TIME_WAIT,
+       NFTNL_CTTIMEOUT_TCP_CLOSE,
+       NFTNL_CTTIMEOUT_TCP_SYN_SENT2,
+       NFTNL_CTTIMEOUT_TCP_RETRANS,
+       NFTNL_CTTIMEOUT_TCP_UNACK,
+       NFTNL_CTTIMEOUT_TCP_MAX
+};
+
+enum nftnl_cttimeout_udp {
+       NFTNL_CTTIMEOUT_UDP_UNREPLIED = 0,
+       NFTNL_CTTIMEOUT_UDP_REPLIED,
+       NFTNL_CTTIMEOUT_UDP_MAX
+};
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif
diff --git a/include/libnftnl/object.h b/include/libnftnl/object.h
index 6f9edfd..08b5d15 100644
--- a/include/libnftnl/object.h
+++ b/include/libnftnl/object.h
@@ -41,6 +41,12 @@ enum {
        NFTNL_OBJ_CT_HELPER_L4PROTO,
 };
 
+enum {
+       NFTNL_OBJ_CT_TIMEOUT_L3PROTO = NFTNL_OBJ_BASE,
+       NFTNL_OBJ_CT_TIMEOUT_L4PROTO,
+       NFTNL_OBJ_CT_TIMEOUT_DATA,
+};
+
 enum {
        NFTNL_OBJ_LIMIT_RATE    = NFTNL_OBJ_BASE,
        NFTNL_OBJ_LIMIT_UNIT,
diff --git a/include/linux/netfilter/nf_tables.h 
b/include/linux/netfilter/nf_tables.h
index 6dc00c6..382ca54 100644
--- a/include/linux/netfilter/nf_tables.h
+++ b/include/linux/netfilter/nf_tables.h
@@ -969,6 +969,7 @@ enum nft_osf_attributes {
  * @NFT_CT_DST_IP: conntrack layer 3 protocol destination (IPv4 address)
  * @NFT_CT_SRC_IP6: conntrack layer 3 protocol source (IPv6 address)
  * @NFT_CT_DST_IP6: conntrack layer 3 protocol destination (IPv6 address)
+ * @NFT_CT_TIMEOUT: connection tracking timeout policy assigned to conntrack
  */
 enum nft_ct_keys {
        NFT_CT_STATE,
@@ -994,6 +995,7 @@ enum nft_ct_keys {
        NFT_CT_DST_IP,
        NFT_CT_SRC_IP6,
        NFT_CT_DST_IP6,
+       NFT_CT_TIMEOUT,
        __NFT_CT_MAX
 };
 #define NFT_CT_MAX             (__NFT_CT_MAX - 1)
@@ -1395,6 +1397,15 @@ enum nft_ct_helper_attributes {
 };
 #define NFTA_CT_HELPER_MAX     (__NFTA_CT_HELPER_MAX - 1)
 
+enum nft_ct_timeout_attributes {
+       NFTA_CT_TIMEOUT_UNSPEC,
+       NFTA_CT_TIMEOUT_L3PROTO,
+       NFTA_CT_TIMEOUT_L4PROTO,
+       NFTA_CT_TIMEOUT_DATA,
+       __NFTA_CT_TIMEOUT_MAX,
+};
+#define NFTA_CT_TIMEOUT_MAX    (__NFTA_CT_TIMEOUT_MAX - 1)
+
 #define NFT_OBJECT_UNSPEC      0
 #define NFT_OBJECT_COUNTER     1
 #define NFT_OBJECT_QUOTA       2
@@ -1402,7 +1413,8 @@ enum nft_ct_helper_attributes {
 #define NFT_OBJECT_LIMIT       4
 #define NFT_OBJECT_CONNLIMIT   5
 #define NFT_OBJECT_TUNNEL      6
-#define __NFT_OBJECT_MAX       7
+#define NFT_OBJECT_CT_TIMEOUT  7
+#define __NFT_OBJECT_MAX       8
 #define NFT_OBJECT_MAX         (__NFT_OBJECT_MAX - 1)
 
 /**
diff --git a/include/obj.h b/include/obj.h
index 9363a69..837a54a 100644
--- a/include/obj.h
+++ b/include/obj.h
@@ -36,6 +36,11 @@ struct nftnl_obj {
                        uint8_t         l4proto;
                        char            name[16];
                } ct_helper;
+               struct nftnl_obj_ct_timeout {
+                       uint16_t        l3proto;
+                       uint8_t         l4proto;
+                       uint32_t        *timeout;
+               } ct_timeout;
                struct nftnl_obj_limit {
                        uint64_t        rate;
                        uint64_t        unit;
@@ -91,6 +96,7 @@ struct obj_ops {
 extern struct obj_ops obj_ops_counter;
 extern struct obj_ops obj_ops_quota;
 extern struct obj_ops obj_ops_ct_helper;
+extern struct obj_ops obj_ops_ct_timeout;
 extern struct obj_ops obj_ops_limit;
 extern struct obj_ops obj_ops_tunnel;
 
diff --git a/src/Makefile.am b/src/Makefile.am
index 9a1a3c4..b5ec079 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -64,4 +64,5 @@ libnftnl_la_SOURCES = utils.c         \
                      obj/quota.c       \
                      obj/tunnel.c      \
                      obj/limit.c       \
+                     obj/ct_timeout.c  \
                      libnftnl.map
diff --git a/src/obj/ct_timeout.c b/src/obj/ct_timeout.c
new file mode 100644
index 0000000..1d3ba8f
--- /dev/null
+++ b/src/obj/ct_timeout.c
@@ -0,0 +1,368 @@
+/*
+ * (C) 2018 by Harsha Sharma <harshasharmai...@gmail.com>
+ *
+ * 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 <stdio.h>
+#include <stdint.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#include <linux/netfilter/nf_tables.h>
+
+#include "internal.h"
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+#include <libnftnl/cttimeout.h>
+
+#include "obj.h"
+
+static const char *const tcp_state_to_name[] = {
+       [NFTNL_CTTIMEOUT_TCP_SYN_SENT]          = "SYN_SENT",
+       [NFTNL_CTTIMEOUT_TCP_SYN_RECV]          = "SYN_RECV",
+       [NFTNL_CTTIMEOUT_TCP_ESTABLISHED]       = "ESTABLISHED",
+       [NFTNL_CTTIMEOUT_TCP_FIN_WAIT]          = "FIN_WAIT",
+       [NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT]        = "CLOSE_WAIT",
+       [NFTNL_CTTIMEOUT_TCP_LAST_ACK]          = "LAST_ACK",
+       [NFTNL_CTTIMEOUT_TCP_TIME_WAIT]         = "TIME_WAIT",
+       [NFTNL_CTTIMEOUT_TCP_CLOSE]             = "CLOSE",
+       [NFTNL_CTTIMEOUT_TCP_SYN_SENT2]         = "SYN_SENT2",
+       [NFTNL_CTTIMEOUT_TCP_RETRANS]           = "RETRANS",
+       [NFTNL_CTTIMEOUT_TCP_UNACK]             = "UNACKNOWLEDGED",
+};
+
+static uint32_t tcp_dflt_timeout[] = {
+       [NFTNL_CTTIMEOUT_TCP_SYN_SENT]          = 120,
+       [NFTNL_CTTIMEOUT_TCP_SYN_RECV]          = 60,
+       [NFTNL_CTTIMEOUT_TCP_ESTABLISHED]       = 432000,
+       [NFTNL_CTTIMEOUT_TCP_FIN_WAIT]          = 120,
+       [NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT]        = 60,
+       [NFTNL_CTTIMEOUT_TCP_LAST_ACK]          = 30,
+       [NFTNL_CTTIMEOUT_TCP_TIME_WAIT]         = 120,
+       [NFTNL_CTTIMEOUT_TCP_CLOSE]             = 10,
+       [NFTNL_CTTIMEOUT_TCP_SYN_SENT2]         = 120,
+       [NFTNL_CTTIMEOUT_TCP_RETRANS]           = 300,
+       [NFTNL_CTTIMEOUT_TCP_UNACK]             = 300,
+};
+
+static const char *const udp_state_to_name[] = {
+       [NFTNL_CTTIMEOUT_UDP_UNREPLIED] = "UNREPLIED",
+       [NFTNL_CTTIMEOUT_UDP_REPLIED]   = "REPLIED",
+};
+
+static uint32_t udp_dflt_timeout[] = {
+       [NFTNL_CTTIMEOUT_UDP_UNREPLIED] = 30,
+       [NFTNL_CTTIMEOUT_UDP_REPLIED]   = 180,
+};
+
+static struct {
+       uint32_t attr_max;
+       const char *const *state_to_name;
+       uint32_t *dflt_timeout;
+} timeout_protocol[IPPROTO_MAX] = {
+       [IPPROTO_TCP]   = {
+               .attr_max       = NFTNL_CTTIMEOUT_TCP_MAX,
+               .state_to_name  = tcp_state_to_name,
+               .dflt_timeout   = tcp_dflt_timeout,
+       },
+       [IPPROTO_UDP]   = {
+               .attr_max       = NFTNL_CTTIMEOUT_UDP_MAX,
+               .state_to_name  = udp_state_to_name,
+               .dflt_timeout   = udp_dflt_timeout,
+       },
+};
+
+struct _container_policy_cb {
+       unsigned int nlattr_max;
+       void *tb;
+};
+
+static int
+nftnl_timeout_policy_attr_set_u32(struct nftnl_obj *e,
+                                uint32_t type, uint32_t data)
+{
+       struct nftnl_obj_ct_timeout *t = nftnl_obj_data(e);
+       size_t timeout_array_size;
+
+       /* Layer 4 protocol needs to be already set. */
+       if (!(e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO)))
+               return -1;
+       if (t->timeout == NULL) {
+               /* if not supported, default to generic protocol tracker. */
+               if (timeout_protocol[t->l4proto].attr_max != 0) {
+                       timeout_array_size = sizeof(uint32_t) *
+                                       timeout_protocol[t->l4proto].attr_max;
+               } else {
+                       timeout_array_size = sizeof(uint32_t) *
+                                       timeout_protocol[IPPROTO_RAW].attr_max;
+               }
+               t->timeout = calloc(1, timeout_array_size);
+               if (t->timeout == NULL)
+                       return -1;
+       }
+
+       /* this state does not exists in this protocol tracker.*/
+       if (type > timeout_protocol[t->l4proto].attr_max)
+               return -1;
+
+       t->timeout[type] = data;
+
+       if (!(e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_DATA)))
+               e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_DATA);
+
+       return 0;
+}
+
+static int
+parse_timeout_attr_policy_cb(const struct nlattr *attr, void *data)
+{
+       struct _container_policy_cb *data_cb = data;
+       const struct nlattr **tb = data_cb->tb;
+       uint16_t type = mnl_attr_get_type(attr);
+
+       if (mnl_attr_type_valid(attr, data_cb->nlattr_max) < 0)
+               return MNL_CB_OK;
+
+       if (type <= data_cb->nlattr_max) {
+               if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
+                       abi_breakage();
+               tb[type] = attr;
+       }
+       return MNL_CB_OK;
+}
+
+static void
+timeout_parse_attr_data(struct nftnl_obj *e,
+                       const struct nlattr *nest)
+{
+       struct nftnl_obj_ct_timeout *t = nftnl_obj_data(e);
+       unsigned int attr_max = timeout_protocol[t->l4proto].attr_max;
+       struct nlattr *tb[attr_max];
+       struct _container_policy_cb cnt = {
+               .nlattr_max = attr_max,
+               .tb = tb,
+       };
+       unsigned int i;
+
+       memset(tb, 0, sizeof(struct nlattr *) * attr_max);
+
+       mnl_attr_parse_nested(nest, parse_timeout_attr_policy_cb, &cnt);
+
+       for (i = 1; i <= attr_max; i++) {
+               if (tb[i]) {
+                       nftnl_timeout_policy_attr_set_u32(e, i-1,
+                               ntohl(mnl_attr_get_u32(tb[i])));
+               }
+       }
+}
+
+static int nftnl_obj_ct_timeout_set(struct nftnl_obj *e, uint16_t type,
+                                  const void *data, uint32_t data_len)
+{
+       struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
+
+       switch (type) {
+       case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
+               timeout->l3proto = *((uint16_t *)data);
+               break;
+       case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
+               timeout->l4proto = *((uint8_t *)data);
+               break;
+       case NFTNL_OBJ_CT_TIMEOUT_DATA:
+               timeout->timeout = ((uint32_t *)data);
+               break;
+       default:
+               return -1;
+               }
+       return 0;
+}
+
+static const void *nftnl_obj_ct_timeout_get(const struct nftnl_obj *e,
+                                          uint16_t type, uint32_t *data_len)
+{
+       struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
+
+       switch (type) {
+       case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
+               *data_len = sizeof(timeout->l3proto);
+               return &timeout->l3proto;
+       case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
+               *data_len = sizeof(timeout->l4proto);
+               return &timeout->l4proto;
+       case NFTNL_OBJ_CT_TIMEOUT_DATA:
+               *data_len = sizeof(timeout->timeout);
+               return timeout->timeout;
+       }
+       return NULL;
+}
+
+static int nftnl_obj_ct_timeout_cb(const struct nlattr *attr, void *data)
+{
+       int type = mnl_attr_get_type(attr);
+       const struct nlattr **tb = data;
+
+       if (mnl_attr_type_valid(attr, NFTA_CT_TIMEOUT_MAX) < 0)
+               return MNL_CB_OK;
+
+       switch (type) {
+       case NFTA_CT_TIMEOUT_L3PROTO:
+               if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
+                       abi_breakage();
+               break;
+       case NFTA_CT_TIMEOUT_L4PROTO:
+               if (mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
+                       abi_breakage();
+               break;
+       case NFTA_CT_TIMEOUT_DATA:
+               if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
+                       abi_breakage();
+               break;
+       }
+
+       tb[type] = attr;
+       return MNL_CB_OK;
+}
+
+static void
+nftnl_obj_ct_timeout_build(struct nlmsghdr *nlh, const struct nftnl_obj *e)
+{
+       struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
+       struct nlattr *nest;
+
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO))
+               mnl_attr_put_u16(nlh, NFTA_CT_TIMEOUT_L3PROTO, 
htons(timeout->l3proto));
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO))
+               mnl_attr_put_u8(nlh, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto);
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_DATA)) {
+               nest = mnl_attr_nest_start(nlh, NFTA_CT_TIMEOUT_DATA);
+               for (int i = 0; i < 
timeout_protocol[timeout->l4proto].attr_max; i++) {
+                       if (timeout->timeout[i])
+                               mnl_attr_put_u32(nlh, i+1, 
htonl(timeout->timeout[i]));
+               }
+               mnl_attr_nest_end(nlh, nest);
+       }
+}
+
+static int
+nftnl_obj_ct_timeout_parse(struct nftnl_obj *e, struct nlattr *attr)
+{
+       struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
+       struct nlattr *tb[NFTA_CT_TIMEOUT_MAX + 1] = {};
+
+       if (mnl_attr_parse_nested(attr, nftnl_obj_ct_timeout_cb, tb) < 0)
+               return -1;
+
+       if (tb[NFTA_CT_TIMEOUT_L3PROTO]) {
+               timeout->l3proto = 
ntohs(mnl_attr_get_u16(tb[NFTA_CT_TIMEOUT_L3PROTO]));
+               e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO);
+       }
+       if (tb[NFTA_CT_TIMEOUT_L4PROTO]) {
+               timeout->l4proto = mnl_attr_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]);
+               e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO);
+       }
+       if (tb[NFTA_CT_TIMEOUT_DATA]) {
+               timeout_parse_attr_data(e, tb[NFTA_CT_TIMEOUT_DATA]);
+               e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_DATA);
+       }
+       return 0;
+}
+
+static int nftnl_obj_ct_timeout_export(char *buf, size_t size,
+                                  const struct nftnl_obj *e, int type)
+{
+       struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
+
+       NFTNL_BUF_INIT(b, buf, size);
+
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO))
+               nftnl_buf_u32(&b, type, timeout->l3proto, FAMILY);
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO))
+               nftnl_buf_u32(&b, type, timeout->l4proto, "service");
+
+       return nftnl_buf_done(&b);
+}
+
+static int nftnl_obj_ct_timeout_snprintf_default(char *buf, size_t len,
+                                              const struct nftnl_obj *e)
+{
+       int ret = 0;
+       int offset = 0, remain = len;
+
+       struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
+
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO)) {
+               ret = snprintf(buf + offset, len, "family %d ",
+                              timeout->l3proto);
+               SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+       }
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO)) {
+               ret = snprintf(buf + offset, len, "protocol %d ",
+                               timeout->l4proto);
+               SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+       }
+       if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_DATA)) {
+               uint8_t l4num = timeout->l4proto;
+               int i;
+
+               /* default to generic protocol tracker. */
+               if (timeout_protocol[timeout->l4proto].attr_max == 0)
+                       l4num = IPPROTO_RAW;
+
+               ret = snprintf(buf + offset, len, "policy = {");
+               SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+
+               for (i = 0; i < timeout_protocol[l4num].attr_max; i++) {
+                       const char *state_name =
+                               timeout_protocol[l4num].state_to_name[i][0] ?
+                               timeout_protocol[l4num].state_to_name[i] :
+                               "UNKNOWN";
+
+                       if (timeout->timeout[i] != 
timeout_protocol[l4num].dflt_timeout[i]) {
+                               ret = snprintf(buf + offset, len,
+                                       "%s = %u,", state_name, 
timeout->timeout[i]);
+                               SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+                       }
+               }
+
+               ret = snprintf(buf + offset, len, "}");
+               SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+       }
+       buf[offset] = '\0';
+
+       return offset;
+}
+
+static int nftnl_obj_ct_timeout_snprintf(char *buf, size_t len, uint32_t type,
+                                      uint32_t flags,
+                                      const struct nftnl_obj *e)
+{
+       if (len)
+               buf[0] = '\0';
+
+       switch (type) {
+       case NFTNL_OUTPUT_DEFAULT:
+               return nftnl_obj_ct_timeout_snprintf_default(buf, len, e);
+       case NFTNL_OUTPUT_JSON:
+               return nftnl_obj_ct_timeout_export(buf, len, e, type);
+       default:
+               break;
+       }
+       return -1;
+}
+
+struct obj_ops obj_ops_ct_timeout = {
+       .name           = "ct_timeout",
+       .type           = NFT_OBJECT_CT_TIMEOUT,
+       .alloc_len      = sizeof(struct nftnl_obj_ct_timeout),
+       .max_attr       = NFTA_CT_TIMEOUT_MAX,
+       .set            = nftnl_obj_ct_timeout_set,
+       .get            = nftnl_obj_ct_timeout_get,
+       .parse          = nftnl_obj_ct_timeout_parse,
+       .build          = nftnl_obj_ct_timeout_build,
+       .snprintf       = nftnl_obj_ct_timeout_snprintf,
+};
diff --git a/src/object.c b/src/object.c
index 803b056..434f999 100644
--- a/src/object.c
+++ b/src/object.c
@@ -31,6 +31,7 @@ static struct obj_ops *obj_ops[] = {
        [NFT_OBJECT_CT_HELPER]  = &obj_ops_ct_helper,
        [NFT_OBJECT_LIMIT]      = &obj_ops_limit,
        [NFT_OBJECT_TUNNEL]     = &obj_ops_tunnel,
+       [NFT_OBJECT_CT_TIMEOUT] = &obj_ops_ct_timeout,
 };
 
 static struct obj_ops *nftnl_obj_ops_lookup(uint32_t type)
-- 
2.14.1

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