diff options
Diffstat (limited to 'plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_outside_input.c')
| -rw-r--r-- | plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_outside_input.c | 605 |
1 files changed, 605 insertions, 0 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_outside_input.c b/plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_outside_input.c new file mode 100644 index 00000000000..5a24a111f75 --- /dev/null +++ b/plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_outside_input.c @@ -0,0 +1,605 @@ + +/* + *--------------------------------------------------------------------------- + * cnat_ipv4_udp_outside_input_stages.c - cnat_ipv4_udp_outside_input node pipeline stage functions + * + * + * Copyright (c) 2008-2014 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *--------------------------------------------------------------------------- + */ + +#include <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vppinfra/error.h> +#include <vnet/buffer.h> + +#include "cnat_ipv4_udp.h" +#include "dslite_db.h" +#include "cnat_db.h" +#include "cnat_v4_functions.h" + +//#include <dslite_v6_functions.h> +//#include <pool.h> +//#include "cnat_va_db.h" + +#define foreach_cnat_ipv4_udp_outside_input_error \ +_(CNAT_V4_UDP_O2I_T_PKT, "v4 udp o2i transmit") \ +_(CNAT_V4_DSLITE_ENCAP_CTR, "to dslite encap") \ +_(CNAT_V4_UDP_O2I_MISS_PKT, "v4 udp o2i db miss drop") \ +_(CNAT_V4_UDP_O2I_TTL_GEN, "v4 udp o2i TTL gen") \ +_(CNAT_V4_UDP_O2I_TTL_DROP, "v4 udp o2i TTL drop") \ +_(CNAT_V4_UDP_O2I_PTB_GEN, "v4 ptb gen") \ +_(CNAT_V4_UDP_O2I_PTB_DROP, "v4 ptb throttle drop") \ +_(CNAT_V4_UDP_O2I_SESSION_DROP, "v4 udp o2i session drop") \ +_(CNAT_V4_UDP_O2I_FILTER_DROP, "v4 udp o2i drop: end point filtering") \ +_(CNAT_V4_UDP_O2I_SUB_FRAG_NO_DB_DROP, "v4 udp o2i subsequent frag no DB drop") \ +_(CNAT_V4_UDP_O2I_1ST_FRAG_FILTER_DROP, "v4 udp i2o 1st frag filter drop") + +typedef enum { +#define _(sym,str) sym, + foreach_cnat_ipv4_udp_outside_input_error +#undef _ + CNAT_IPV4_UDP_OUTSIDE_INPUT_N_ERROR, +} cnat_ipv4_udp_outside_input_t; + +static char * cnat_ipv4_udp_outside_input_error_strings[] = { +#define _(sym,string) string, + foreach_cnat_ipv4_udp_outside_input_error +#undef _ +}; + +typedef struct { + u32 cached_next_index; + /* $$$$ add data here */ + + /* convenience variables */ + vlib_main_t * vlib_main; + vnet_main_t * vnet_main; +} cnat_ipv4_udp_outside_input_main_t; + +typedef enum { + //CNAT_V4_O2I_FIXME, + CNAT_V4_UDP_O2I_E, + CNAT_V4_UDP_O2I_T, + CNAT_V4_UDP_O2I_NEXT, +} cnat_ipv4_udp_outside_input_next_t; + +//#define CNAT_V4_DSLITE_ENCAP CNAT_V4_O2I_FIXME +//#define CNAT_V4_UDP_O2I_E CNAT_V4_O2I_FIXME + +cnat_ipv4_udp_outside_input_main_t cnat_ipv4_udp_outside_input_main; +vlib_node_registration_t cnat_ipv4_udp_outside_input_node; + +#define NSTAGES 6 + +/* + * Use the generic buffer metadata + first line of packet data prefetch + * stage function from <api/pipeline.h>. This is usually a Good Idea. + */ +#define stage0 generic_stage0 + + +#if 0 +typedef struct cnat_ipv4_udp_outside_input_pipeline_data_ { + //spp_node_main_vector_t *nmv; + dslite_common_pipeline_data_t common_data; + /* Add additional pipeline stage data here... */ + u32 bucket; +#ifdef DSLITE_DEF + u32 user_bucket; + dslite_v4_to_v6_udp_counter_t *udp_counter; + dslite_icmp_gen_counter_t *icmp_gen_counter; + +#endif + cnat_key_t ki; + udp_hdr_type_t *udp; + u8 frag_pkt; +} cnat_ipv4_udp_outside_input_pipeline_data_t; + +#endif + +#define CNAT_UDP_OUTSIDE_UPDATE_FLAG_TIMER(db,dslite_nat44_inst_id) \ + if (PREDICT_FALSE(!(db->flags & CNAT_DB_FLAG_UDP_ACTIVE))) { \ + db->flags |= CNAT_DB_FLAG_UDP_ACTIVE; \ + CNAT_DB_TIMEOUT_RST(db); \ + } else if (PREDICT_FALSE(db->flags & CNAT_DB_DSLITE_FLAG)) { \ + if (PREDICT_TRUE(dslite_table_db_ptr[dslite_nat44_inst_id].mapping_refresh_both_direction)) { \ + CNAT_DB_TIMEOUT_RST(db); \ + } \ + } else if (PREDICT_TRUE(mapping_refresh_both_direction)) { \ + CNAT_DB_TIMEOUT_RST(db); \ + } \ + +#if 0 +static cnat_ipv4_udp_outside_input_pipeline_data_t pctx_data[SPP_MAXDISPATCH]; +#define EXTRA_PIPELINE_ARGS_PROTO , cnat_ipv4_udp_outside_input_pipeline_data_t *pctx +#define EXTRA_PIPELINE_ARGS , pctx + +#endif + +/*inline u32 +is_static_dest_nat_enabled(u16 vrf) +{ + if(static_dest_vrf_map_array[vrf] == 1) { + return CNAT_SUCCESS; + } + return CNAT_NO_CONFIG; +}*/ + +static inline void __attribute__((unused)) +swap_ip_dst(ipv4_header *ip, cnat_main_db_entry_t *db, u16 vrf) +{ + + CNAT_UPDATE_L3_CHECKSUM_DECLARE + /* + * calculate checksum + */ + CNAT_UPDATE_L3_CHECKSUM(((u16)(db->out2in_key.k.ipv4)), + ((u16)(db->out2in_key.k.ipv4 >> 16)), + (clib_host_to_net_u16(ip->checksum)), + ((u16)(db->in2out_key.k.ipv4)), + ((u16)(db->in2out_key.k.ipv4 >> 16))) + //set ip header + ip->dest_addr = + clib_host_to_net_u32(db->in2out_key.k.ipv4); + ip->checksum = + clib_host_to_net_u16(new_l3_c); + +#if 0 + + if(is_static_dest_nat_enabled(vrf) == CNAT_SUCCESS) { + direction = 1; + if(cnat_static_dest_db_get_translation(ip->src_addr, &postmap_ip, vrf, direction) == CNAT_SUCCESS) { + old_ip = spp_net_to_host_byte_order_32(&(ip->src_addr)); + old_postmap_ip = spp_net_to_host_byte_order_32(&postmap_ip); + + CNAT_UPDATE_L3_CHECKSUM(((u16)(old_ip & 0xFFFF)), + ((u16)(old_ip >> 16)), + (spp_net_to_host_byte_order_16(&(ip->checksum))), + ((u16)(old_postmap_ip & 0xFFFF)), + ((u16)(old_postmap_ip >> 16))) + ip->checksum = + clib_host_to_net_u16(new_l3_c); + ip->src_addr = postmap_ip; + } + } +#endif +} + +inline void swap_ip_dst_udp_port(ipv4_header *ip, + udp_hdr_type_t *udp, + cnat_main_db_entry_t *db, u16 vrf) +{ + +#define UDP_PACKET_DEBUG 1 + +// Temporary debugs which will be suppressed later +#ifdef UDP_PACKET_DEBUG + if (PREDICT_FALSE(udp_outside_packet_dump_enable)) { + printf("\nOut2In UDP packet before translation"); + print_udp_pkt(ip); + } +#endif + +#if 0 + if(is_static_dest_nat_enabled(vrf) == CNAT_SUCCESS) { + direction = 1; + if(cnat_static_dest_db_get_translation(ip->src_addr, &postmap_ip, vrf, direction) == CNAT_SUCCESS) { + + CNAT_UPDATE_L3_L4_CHECKSUM_DECLARE + + old_ip = spp_net_to_host_byte_order_32(&(ip->src_addr)); + old_postmap_ip = spp_net_to_host_byte_order_32(&postmap_ip); + + CNAT_UPDATE_L3_L4_CHECKSUM(((u16)(old_ip & 0xFFFF)), + ((u16)(old_ip >> 16)), + (spp_net_to_host_byte_order_16(&(udp->src_port))), + (spp_net_to_host_byte_order_16(&(ip->checksum))), + (spp_net_to_host_byte_order_16(&(udp->udp_checksum))), + ((u16)(old_postmap_ip & 0xFFFF)), + ((u16)(old_postmap_ip >> 16)), + (spp_net_to_host_byte_order_16(&(udp->src_port)))) + + ip->checksum = + clib_host_to_net_u16(new_l3_c); + ip->src_addr = postmap_ip; + if (PREDICT_TRUE(udp->udp_checksum)) { + udp->udp_checksum = clib_host_to_net_u16(new_l4_c); + } + } + } +#endif + /* + * declare variable + */ + CNAT_UPDATE_L3_L4_CHECKSUM_DECLARE + /* + * calculate checksum + */ + CNAT_UPDATE_L3_L4_CHECKSUM(((u16)(db->out2in_key.k.ipv4)), + ((u16)(db->out2in_key.k.ipv4 >> 16)), + (db->out2in_key.k.port), + (clib_net_to_host_u16(ip->checksum)), + (clib_net_to_host_u16(udp->udp_checksum)), + ((u16)(db->in2out_key.k.ipv4)), + ((u16)(db->in2out_key.k.ipv4 >> 16)), + (db->in2out_key.k.port)) + + + + + //set ip header + ip->dest_addr = + clib_host_to_net_u32(db->in2out_key.k.ipv4); + ip->checksum = + clib_host_to_net_u16(new_l3_c); + + //set udp header + udp->dest_port = + clib_host_to_net_u16(db->in2out_key.k.port); + + /* + * No easy way to avoid this if check except by using + * complex logic - may not be worth it. + */ + if (PREDICT_TRUE(udp->udp_checksum)) { + udp->udp_checksum = clib_host_to_net_u16(new_l4_c); + } + + + +// Temporary debugs which will be suppressed later +#ifdef UDP_PACKET_DEBUG + if (PREDICT_FALSE(udp_outside_checksum_disable)) { + printf("\nOut2In UDP checksum 0x%x disabled by force", new_l4_c); + udp->udp_checksum = 0; + } + if (PREDICT_FALSE(udp_outside_packet_dump_enable)) { + printf("\nOut2In UDP packet after translation"); + print_udp_pkt(ip); + } +#endif +} + +static inline void +stage1(vlib_main_t * vm, vlib_node_runtime_t * node, u32 buffer_index) +{ + u64 a, b, c; + u32 bucket; + u8 *prefetch_target; + + vlib_buffer_t * b0 = vlib_get_buffer (vm, buffer_index); + ipv4_header *ip = vlib_buffer_get_current (b0); + u8 ipv4_hdr_len = (ip->version_hdr_len_words & 0xf) << 2; + udp_hdr_type_t *udp = (udp_hdr_type_t *)((u8*)ip + ipv4_hdr_len); + + u64 tmp = 0; + tmp = vnet_buffer(b0)->vcgn_uii.key.k.ipv4 = + clib_net_to_host_u32(ip->dest_addr); + vnet_buffer(b0)->vcgn_uii.key.k.port = + clib_net_to_host_u16 (udp->dest_port); + + tmp |= ((u64)vnet_buffer(b0)->vcgn_uii.key.k.port) << 32; + + PLATFORM_CNAT_SET_RX_VRF(vnet_buffer(b0)->sw_if_index[VLIB_RX], + vnet_buffer(b0)->vcgn_uii.key.k.vrf, + CNAT_UDP) + tmp |= ((u64)vnet_buffer(b0)->vcgn_uii.key.k.vrf) << 48; + + CNAT_V4_GET_HASH(tmp, bucket, CNAT_MAIN_HASH_MASK) + + prefetch_target = (u8 *)(&cnat_out2in_hash[bucket]); + vnet_buffer(b0)->vcgn_uii.bucket = bucket; + + /* Prefetch the hash bucket */ + CLIB_PREFETCH(prefetch_target, CLIB_CACHE_LINE_BYTES, LOAD); +} + +static inline void +stage2(vlib_main_t * vm, vlib_node_runtime_t * node, u32 buffer_index) +{ /* nothing */ } + +#define SPP_LOG2_CACHE_LINE_BYTES 6 +#define SPP_CACHE_LINE_BYTES (1 << SPP_LOG2_CACHE_LINE_BYTES) + +static inline void +stage3(vlib_main_t * vm, vlib_node_runtime_t * node, u32 buffer_index) +{ + vlib_buffer_t * b0 = vlib_get_buffer(vm, buffer_index); + uword prefetch_target0, prefetch_target1; + u32 bucket = vnet_buffer(b0)->vcgn_uii.bucket; + + /* read the hash bucket */ + u32 db_index = vnet_buffer(b0)->vcgn_uii.bucket + = cnat_out2in_hash[bucket].next; + + if (PREDICT_TRUE(db_index != EMPTY)) { + /* + * Prefetch database keys. We save space by not cache-line + * aligning the DB entries. We don't want to waste LSU + * bandwidth prefetching stuff we won't need. + */ + prefetch_target0 = (uword)(cnat_main_db + db_index); + CLIB_PREFETCH((void*)prefetch_target0, CLIB_CACHE_LINE_BYTES, STORE); + /* Just beyond DB key #2 */ + prefetch_target1 = prefetch_target0 + + STRUCT_OFFSET_OF(cnat_main_db_entry_t, user_ports); + /* If the targets are in different lines, do the second prefetch */ + if (PREDICT_FALSE((prefetch_target0 & ~(SPP_CACHE_LINE_BYTES-1)) != + (prefetch_target1 & ~(SPP_CACHE_LINE_BYTES-1)))) { + CLIB_PREFETCH((void *)prefetch_target1, CLIB_CACHE_LINE_BYTES, STORE); + } + } +} + +static inline void +stage4(vlib_main_t * vm, vlib_node_runtime_t * node, u32 buffer_index) +{ + cnat_main_db_entry_t *db; + vlib_buffer_t * b0 = vlib_get_buffer(vm, buffer_index); + u32 db_index = vnet_buffer(b0)->vcgn_uii.bucket; + + /* + * Note: if the search already failed (empty bucket), + * the answer is already in the pipeline context structure + */ + if (PREDICT_TRUE(db_index != EMPTY)) { + + /* + * Note: hash collisions suck. We can't easily prefetch around them. + * The first trip around the track will be fast. After that, maybe + * not so much... + */ + do { + db = cnat_main_db + db_index; + if (PREDICT_TRUE(db->out2in_key.key64 == + vnet_buffer(b0)->vcgn_uii.key.key64)) { + break; + } + db_index = db->out2in_hash.next; + } while (db_index != EMPTY); + + /* Stick the answer back into the pipeline context structure */ + vnet_buffer(b0)->vcgn_uii.bucket = db_index; + } +} + +#if 0 + +ALWAYS_INLINE( +static inline void +stage5(spp_ctx_t **ctxs, int index, spp_node_t *np, + u8 *disp_used EXTRA_PIPELINE_ARGS_PROTO)) +{ + spp_ctx_t *ctx = ctxs[index]; + u32 db_index = pctx[index].bucket; + /* for nat44, dslite_id will be 1 */ + u16 dslite_id = *(pctx[index].common_data.dslite_id_ptr); + + DSLITE_PREFETCH_COUNTER(pctx[index].udp_counter, + &dslite_all_counters[dslite_id].v46_udp_counters, + dslite_v4_to_v6_udp_counter_t, + v4_to_v6_udp_output_count, + "V4_TO_V6_UDP") + + DSLITE_PREFETCH_COUNTER(pctx[index].icmp_gen_counter, + &dslite_all_counters[dslite_id].dslite_icmp_gen_counters, + dslite_icmp_gen_counter_t, + v6_icmp_gen_count, + "V4_TO_V6_icmp") + +if (PREDICT_TRUE(db_index != EMPTY)) { + cnat_main_db_entry_t *db = cnat_main_db + db_index; + + u32 user_db_index = db->user_index; + DSLITE_PRINTF(1, "UDP o2i, db entry found %u %u %u\n", + db_index, user_db_index, + db->dslite_nat44_inst_id); + uword prefetch_target0 = (uword)(cnat_user_db + user_db_index); + SPP_PREFETCH(prefetch_target0, 0, LOAD); + pctx[index].user_bucket = user_db_index; + DSLITE_PRINTF(1, "UDP: Done with prefetch..\n"); +} else { + DSLITE_PRINTF(1, "UDP: Stage 5, db_index empty...\n"); +} +} + +#endif + + +static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node, + u32 bi) +{ + + vlib_buffer_t *b0 = vlib_get_buffer (vm, bi); + u32 db_index = vnet_buffer(b0)->vcgn_uii.bucket; + //spp_ctx_t *ctx = (spp_ctx_t *) &vnet_buffer(b0)->vcgn_uii; + int disposition = CNAT_V4_UDP_O2I_T; + int counter = CNAT_V4_UDP_O2I_T_PKT; + ipv4_header *ip = (ipv4_header *)vlib_buffer_get_current(b0); + u8 ipv4_hdr_len = (ip->version_hdr_len_words & 0xf) << 2; + udp_hdr_type_t *udp = (udp_hdr_type_t *)((u8*)ip + ipv4_hdr_len); + vlib_node_t *n = vlib_get_node (vm, cnat_ipv4_udp_outside_input_node.index); + u32 node_counter_base_index = n->error_heap_index; + vlib_error_main_t * em = &vm->error_main; + cnat_session_entry_t *session_db = NULL; + cnat_main_db_entry_t *db = NULL; + cnat_key_t dest_info; + u16 dslite_nat44_inst_id __attribute__((unused)) = 0; + + dest_info.k.port = clib_net_to_host_u16(udp->src_port); + dest_info.k.ipv4 = clib_net_to_host_u32(ip->src_addr); + + if (PREDICT_TRUE(db_index != EMPTY)) { + /* TTL gen was disabled for nat44 earlier + * But since dslite has got integrated in this + * TTL gen is enabled + */ + + db = cnat_main_db + db_index; + if (PLATFORM_HANDLE_TTL_DECREMENT) { + /* + * Decrement TTL and update IPv4 checksum + */ + ipv4_decr_ttl_n_calc_csum(ip); + } + if(PREDICT_TRUE(!PLATFORM_DBL_SUPPORT)) { + + /* No DBL support, so just update the destn and proceed */ + db->dst_ipv4 = dest_info.k.ipv4; + db->dst_port = dest_info.k.port; + CNAT_UDP_OUTSIDE_UPDATE_FLAG_TIMER(db, 0) + goto update_pkt; + } + + + if(PREDICT_TRUE((db->dst_ipv4 == dest_info.k.ipv4) && + (db->dst_port == dest_info.k.port))) { + + CNAT_UDP_OUTSIDE_UPDATE_FLAG_TIMER(db, 0) + goto update_pkt; + } else { + /* The session entries belonging to this entry are checked to find + * if an entry exist whose destination IP and port match with the + * source IP and port of the packet being processed + */ + dest_info.k.vrf = db->in2out_key.k.vrf; + + if (PREDICT_FALSE(db->nsessions == 0)) { + /* Should be a static entry + * Note this session as the first session and log + */ + cnat_add_dest_n_log(db, &dest_info); + CNAT_UDP_OUTSIDE_UPDATE_FLAG_TIMER(db, 0) + + } else if(PREDICT_TRUE(db->nsessions == 1)) { + + /* Destn is not same as in main db. Multiple session + * scenario + */ + dest_info.k.vrf = db->in2out_key.k.vrf; + session_db = cnat_handle_1to2_session(db, &dest_info); + + if(PREDICT_FALSE(session_db == NULL)) { + disposition = CNAT_V4_UDP_O2I_E; + counter = CNAT_V4_UDP_O2I_SESSION_DROP; + goto drop_pkt; + } + + /* update session_db(cur packet) timer */ + CNAT_UDP_OUTSIDE_UPDATE_FLAG_TIMER(session_db, 0) + } else { + /* More 2 sessions exists */ + + dest_info.k.vrf = db->in2out_key.k.vrf; + + /* If session already exists, + * cnat_create_session_db_entry will return the existing db + * else create a new db + * If could not create, return NULL + */ + session_db = cnat_create_session_db_entry(&dest_info, + db, TRUE); + + if(PREDICT_FALSE(session_db != NULL)) { + /* session exists */ + CNAT_UDP_OUTSIDE_UPDATE_FLAG_TIMER(session_db, 0) + } else { + /* could not create session db - drop packet */ + disposition = CNAT_V4_UDP_O2I_E; + counter = CNAT_V4_UDP_O2I_SESSION_DROP; + goto drop_pkt; + } + } + } + +update_pkt: + + /* + * 1. update dest ipv4 addr and dest udp port + * 2. update ipv4 checksum and udp checksum + */ + //swap_ip_dst(ip, db, db->in2out_key.k.vrf); + swap_ip_dst_udp_port(ip, udp, db, db->in2out_key.k.vrf); + //DSLITE_PRINTF(1, "Done with swap_ip_dst_udp_port..\n"); + + db->out2in_pkts++; + + nat44_dslite_global_stats[0].out2in_forwarding_count++; + + /* #### Temporarily COMMENTED FOR IP ROUTE LOOKUP ISSUE #### */ + + //PLATFORM_CNAT_SET_TX_VRF(vnet_buffer(b0)->sw_if_index[VLIB_TX], + // db->in2out_key.k.vrf) + } else { + disposition = CNAT_V4_UDP_O2I_E; + counter = CNAT_V4_UDP_O2I_MISS_PKT; + /* for NAT44 dslite_id would be 1 */ + nat44_dslite_common_stats[0].no_translation_entry_drops ++; + } + +drop_pkt: + + em->counters[node_counter_base_index + counter] += 1; + return disposition; +} + +#include <vnet/pipeline.h> + +static uword cnat_ipv4_udp_outside_input_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return dispatch_pipeline (vm, node, frame); +} + + +VLIB_REGISTER_NODE (cnat_ipv4_udp_outside_input_node) = { + .function = cnat_ipv4_udp_outside_input_node_fn, + .name = "vcgn-v4-udp-o2i", + .vector_size = sizeof (u32), + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(cnat_ipv4_udp_outside_input_error_strings), + .error_strings = cnat_ipv4_udp_outside_input_error_strings, + + .n_next_nodes = CNAT_V4_UDP_O2I_NEXT, + + /* edit / add dispositions here */ +#if 0 + .next_nodes = { + //[CNAT_V4_O2I_FIXME] = "error-drop", + //[CNAT_V4_UDP_O2I_E] = "vcgn-v4-udp-o2i-e", + [CNAT_V4_UDP_O2I_E] = "vcgn-v4-udp-o2i-e", + [CNAT_V4_UDP_O2I_T] = "ip4-input", + }, +#endif + .next_nodes = { + [CNAT_V4_UDP_O2I_E] = "error-drop", + [CNAT_V4_UDP_O2I_T] = "ip4-input", + }, + +}; + +clib_error_t *cnat_ipv4_udp_outside_input_init (vlib_main_t *vm) +{ + cnat_ipv4_udp_outside_input_main_t * mp = &cnat_ipv4_udp_outside_input_main; + + mp->vlib_main = vm; + mp->vnet_main = vnet_get_main(); + + return 0; +} + +VLIB_INIT_FUNCTION (cnat_ipv4_udp_outside_input_init); |