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Diffstat (limited to 'plugins/vcgn-plugin/vcgn/cnat_ipv4_tcp_inside_input.c')
-rw-r--r--plugins/vcgn-plugin/vcgn/cnat_ipv4_tcp_inside_input.c424
1 files changed, 0 insertions, 424 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_ipv4_tcp_inside_input.c b/plugins/vcgn-plugin/vcgn/cnat_ipv4_tcp_inside_input.c
deleted file mode 100644
index 5bea707385c..00000000000
--- a/plugins/vcgn-plugin/vcgn/cnat_ipv4_tcp_inside_input.c
+++ /dev/null
@@ -1,424 +0,0 @@
-/*
- *---------------------------------------------------------------------------
- * cnat_ipv4_tcp_inside_input.c - cnat_ipv4_tcp_inside_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_db.h"
-#include "tcp_header_definitions.h"
-#include "cnat_config.h"
-#include "cnat_global.h"
-#include "cnat_v4_functions.h"
-
-#define foreach_cnat_ipv4_tcp_inside_input_error \
-_(CNAT_V4_TCP_I2O_PKT_IN, "tcp i2o packets received") \
-_(CNAT_V4_TCP_I2O_PKT_T, "tcp i2o packets natted") \
-_(CNAT_V4_TCP_I2O_EXCEPTION, "packets to tcp i2o exception") \
-_(CNAT_V4_TCP_I2O_TTL_GEN, "generated TTL expiry ICMP packets") \
-_(CNAT_V4_TCP_I2O_TTL_GEN_DROP, "could not generate TTL expiry ICMP packets") \
-_(CNAT_V4_TCP_I2O_SESSION_DROP, "could not generate session") \
-_(CNAT_V4_UDP_I2O_FRAG_DROP, "non-first fragment drop")
-
-typedef enum {
-#define _(sym,str) sym,
- foreach_cnat_ipv4_tcp_inside_input_error
-#undef _
- CNAT_IPV4_TCP_INSIDE_INPUT_N_ERROR,
-} cnat_ipv4_tcp_inside_input_t;
-
-static char * cnat_ipv4_tcp_inside_input_error_strings[] = {
-#define _(sym,string) string,
- foreach_cnat_ipv4_tcp_inside_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_tcp_inside_input_main_t;
-
-typedef enum {
- CNAT_V4_TCP_I2O_E,
- CNAT_V4_TCP_I2O_T,
- CNAT_V4_TCP_I2O_D,
- CNAT_V4_TCP_I2O_NEXT,
-} cnat_ipv4_tcp_inside_input_next_t;
-
-#define CNAT_REWRITE_OUTPUT CNAT_V4_TCP_I2O_T
-#define CNAT_V4_ICMP_GEN CNAT_V4_TCP_I2O_D
-
-//#define CNAT_V4_TCP_I2O_E CNAT_V4_TCP_I2O_D //remove it once exception node is created
-cnat_ipv4_tcp_inside_input_main_t cnat_ipv4_tcp_inside_input_main;
-vlib_node_registration_t cnat_ipv4_tcp_inside_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
-
-
-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;
- //cnat_feature_data_t *fd = (cnat_feature_data_t *)ctx->feature_data;
-
-
- 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;
- tcp_hdr_type *tcp = (tcp_hdr_type *)((u8*)ip + ipv4_hdr_len);
-
- u64 tmp = 0;
- tmp = vnet_buffer(b0)->vcgn_uii.key.k.ipv4 =
- clib_net_to_host_u32(ip->src_addr);
- vnet_buffer(b0)->vcgn_uii.key.k.port =
- clib_net_to_host_u16 (tcp->src_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_TCP)
- 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_in2out_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_in2out_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, LOAD);
- /* 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, LOAD);
- }
- }
-}
-
-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->in2out_key.key64 ==
- vnet_buffer(b0)->vcgn_uii.key.key64)) {
- break;
- }
- db_index = db->in2out_hash.next;
- } while (db_index != EMPTY);
-
- /* Stick the answer back into the pipeline context structure */
- vnet_buffer(b0)->vcgn_uii.bucket = db_index;
- }
-}
-
-
-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_TCP_I2O_T;
- int counter = CNAT_V4_TCP_I2O_PKT_T;
-
- ipv4_header *ip = (ipv4_header *)vlib_buffer_get_current(b0);
- u8 ipv4_hdr_len = (ip->version_hdr_len_words & 0xf) << 2;
- tcp_hdr_type *tcp = (tcp_hdr_type *)((u8*)ip + ipv4_hdr_len);
- vlib_node_t *n = vlib_get_node (vm, cnat_ipv4_tcp_inside_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;
- u32 window;
- u8 scale;
-
-
- INCREMENT_NODE_COUNTER(CNAT_V4_TCP_I2O_PKT_IN);
-
- if (PLATFORM_HANDLE_TTL_DECREMENT) {
- if (PREDICT_FALSE(ip->ttl <= 1)) {
- /* Try to generate ICMP error msg, as TTL is <= 1 */
-
- if (icmpv4_generate_with_throttling
- (ctx, ip, ctx->ru.rx.uidb_index)) {
-
- /* Generated ICMP */
- disposition = CNAT_REWRITE_OUTPUT;
- counter = CNAT_V4_TCP_I2O_TTL_GEN;
- } else {
- /* Could not generated ICMP - drop the packet */
- disposition = CNAT_V4_TCP_I2O_D;
- counter = CNAT_V4_TCP_I2O_TTL_GEN_DROP;
- }
- goto drop_pkt;
- }
- }
-
- if (PREDICT_FALSE(db_index == EMPTY)) {
- /* Deleted fragment code from here */
- disposition = CNAT_V4_TCP_I2O_E;
- counter = CNAT_V4_TCP_I2O_EXCEPTION;
- } else {
- db = cnat_main_db + db_index;
-
- /* Handle destination sessions */
- dest_info.k.port = clib_net_to_host_u16(tcp->dest_port);
- dest_info.k.ipv4 = clib_net_to_host_u32(ip->dest_addr);
-
- 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;
- goto update_pkt;
- }
-
- if(PREDICT_FALSE(db->dst_ipv4 != dest_info.k.ipv4 ||
- db->dst_port != dest_info.k.port)) {
- if(PREDICT_TRUE(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);
- } else if(PREDICT_FALSE(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_TCP_I2O_D;
- counter = CNAT_V4_TCP_I2O_SESSION_DROP;
- goto drop_pkt;
- }
- } else { /* There are already multiple destinations */
- 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)) {
- disposition = CNAT_V4_TCP_I2O_D;
- counter = CNAT_V4_TCP_I2O_SESSION_DROP;
- goto drop_pkt;
- }
- }
- if(PREDICT_TRUE(session_db != 0)) {
- /* Have to repeat the window size check for new destinations */
- window = (u32)clib_net_to_host_u16(tcp->window_size);
- window = window << session_db->scale;
- if(PREDICT_TRUE(!session_db->window)) {
- calculate_window_scale(tcp, &scale);
- session_db->scale = scale;
- session_db->window = window;
- } else if (PREDICT_FALSE(session_db->window <
- window)) {
- /* Update the db entry with window option from packet */
- session_db->window = window;
- } else {
- /* Do nothing */
- }
- session_db->tcp_seq_num = clib_net_to_host_u32(tcp->seq_num);
- session_db->ack_no = clib_net_to_host_u32(tcp->ack_num);
-#if DEBUG > 1
- printf("\n In2out SDB stages seq no = %u,"
- " ack no = %u, window = %u\n",
- session_db->tcp_seq_num,
- session_db->ack_no,
- session_db->window);
-#endif
-
- }
- } else {
- //Update the seq no and ack no for subsequent communication
- //after connection establishment
- //No need to update window here. Window is already updated
- //during connection establishment
- window = (u32)clib_net_to_host_u16(tcp->window_size);
- window = window << db->scale;
- if(PREDICT_FALSE(!ALG_ENABLED_DB(db))) {
- //This check is done since proto_data is part of union in main
- //db entry
- db->proto_data.tcp_seq_chk.seq_no =
- clib_net_to_host_u32(tcp->seq_num);
- db->proto_data.tcp_seq_chk.ack_no =
- clib_net_to_host_u32(tcp->ack_num);
- }
- if (PREDICT_FALSE(db->diff_window < window)) {
- /* Update the db entry with window option from packet */
- db->diff_window = window;
- }
-#if DEBUG > 1
- printf("\n In2out MainDB seq no = %u,"
- "\n ack no = %u\n",
- db->proto_data.tcp_seq_chk.seq_no,
- db->proto_data.tcp_seq_chk.ack_no);
- printf("\n In2out MAINDB window = %u\n",
- db->diff_window);
-#endif
- }
-update_pkt:
-
- counter = CNAT_V4_TCP_I2O_PKT_T;
- disposition = CNAT_V4_TCP_I2O_T;
-
- /* NO FRAGMENT & ALG HANDLING. DELETING THE CODE */
-
- if (PLATFORM_HANDLE_TTL_DECREMENT) {
- /*
- * Decrement TTL and update IPv4 checksum
- */
- ipv4_decr_ttl_n_calc_csum(ip);
- }
-
- tcp_in2out_nat_mss_n_checksum(ip,
- tcp,
- db->out2in_key.k.ipv4,
- db->out2in_key.k.port,
- db
- /*, db->in2out_key.k.vrf */);
-
- /* update transaltion counters */
- db->in2out_pkts++;
- in2out_forwarding_count++;
-
- /* update the timer for good mode, or evil mode dst_ip match */
-
- if(PREDICT_FALSE(session_db != NULL)) {
- V4_TCP_UPDATE_SESSION_DB_FLAG(session_db, tcp);
- CNAT_DB_TIMEOUT_RST(session_db);
- } else {
- V4_TCP_UPDATE_SESSION_FLAG(db, tcp);
- CNAT_DB_TIMEOUT_RST(db);
- }
- }
-
-drop_pkt:
-
- em->counters[node_counter_base_index + counter] += 1;
- return disposition;
-}
-
-#include <vnet/pipeline.h>
-
-static uword cnat_ipv4_tcp_inside_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_tcp_inside_input_node) = {
- .function = cnat_ipv4_tcp_inside_input_node_fn,
- .name = "vcgn-v4-tcp-i2o",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(cnat_ipv4_tcp_inside_input_error_strings),
- .error_strings = cnat_ipv4_tcp_inside_input_error_strings,
-
- .n_next_nodes = CNAT_V4_TCP_I2O_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [CNAT_V4_TCP_I2O_E] = "vcgn-v4-tcp-i2o-e",
- [CNAT_V4_TCP_I2O_T] = "ip4-input",
- [CNAT_V4_TCP_I2O_D] = "error-drop",
- },
-};
-
-clib_error_t *cnat_ipv4_tcp_inside_input_init (vlib_main_t *vm)
-{
- cnat_ipv4_tcp_inside_input_main_t * mp = &cnat_ipv4_tcp_inside_input_main;
-
- mp->vlib_main = vm;
- mp->vnet_main = vnet_get_main();
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (cnat_ipv4_tcp_inside_input_init);