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Diffstat (limited to 'plugins/vcgn-plugin/vcgn/cnat_v4_functions.c')
-rw-r--r--plugins/vcgn-plugin/vcgn/cnat_v4_functions.c364
1 files changed, 0 insertions, 364 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_v4_functions.c b/plugins/vcgn-plugin/vcgn/cnat_v4_functions.c
deleted file mode 100644
index d3051fba5a7..00000000000
--- a/plugins/vcgn-plugin/vcgn/cnat_v4_functions.c
+++ /dev/null
@@ -1,364 +0,0 @@
-/*
- *---------------------------------------------------------------------------
- * cnat_v4_funtions.c
- *
- * Copyright (c) 2008-2013 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 <vnet/pg/pg.h>
-#include <vppinfra/error.h>
-
-
-#include "tcp_header_definitions.h"
-#include "cnat_db.h"
-#include "cnat_config.h"
-#include "cnat_v4_functions.h"
-#include "dslite_defs.h"
-#include "dslite_db.h"
-
-static u32 tcp_logging_count;
-static u32 tcp_logging_overflow;
-
-static tcp_logging_struct_t tcp_logging_array[MAX_TCP_LOGGING_COUNT];
-
-/*
- * Function to log TCP pkts checksum changes..
- */
-void
-tcp_debug_logging (
- u32 seq_num,
- u32 ack_num,
- u32 old_ip,
- u32 new_ip,
- u16 old_port,
- u16 new_port,
- u16 old_ip_crc,
- u16 new_ip_crc,
- u16 old_tcp_crc,
- u16 new_tcp_crc)
-{
- tcp_logging_array[tcp_logging_count].seq_num = seq_num;
- tcp_logging_array[tcp_logging_count].ack_num = ack_num;
- tcp_logging_array[tcp_logging_count].old_ip = old_ip;
- tcp_logging_array[tcp_logging_count].new_ip = new_ip;
- tcp_logging_array[tcp_logging_count].old_port = old_port;
- tcp_logging_array[tcp_logging_count].new_port = new_port;
- tcp_logging_array[tcp_logging_count].old_ip_crc = old_ip_crc;
- tcp_logging_array[tcp_logging_count].new_ip_crc = new_ip_crc;
- tcp_logging_array[tcp_logging_count].old_tcp_crc = old_tcp_crc;
- tcp_logging_array[tcp_logging_count].new_tcp_crc = new_tcp_crc;
-
- tcp_logging_count++;
-
- if (tcp_logging_count >= MAX_TCP_LOGGING_COUNT) {
- tcp_logging_overflow = 1;
- tcp_logging_count = 0;
- }
-}
-
-/*
- * Function to dmp TCP pkts logged..
- */
-void
-tcp_debug_logging_dump (void)
-{
- u32 i, total_count, start_entry;
-
- if (tcp_logging_overflow) {
- total_count = MAX_TCP_LOGGING_COUNT;
- start_entry = tcp_logging_count;
- printf("Logging Entries Wrapped Around, displaying %d entries\n",
- total_count);
- } else {
- total_count = tcp_logging_count;
- start_entry = 0;
- printf("Displaying %d entries\n", total_count);
- }
-
- printf("SEQ ACK IP_O IP_N PORT_O PORT_N L3_CRC_O L3_CRC_N L4_CRC_O L4_CRC_N\n");
-
- for (i = 0; i < total_count; i++) {
- u32 entry = (i + start_entry) % MAX_TCP_LOGGING_COUNT;
-
- printf("%04d: 0x%08x 0x%08x 0x%08x 0x%08x 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x\n",
- entry,
- tcp_logging_array[entry].seq_num,
- tcp_logging_array[entry].ack_num,
- tcp_logging_array[entry].old_ip,
- tcp_logging_array[entry].new_ip,
- tcp_logging_array[entry].old_port,
- tcp_logging_array[entry].new_port,
- tcp_logging_array[entry].old_ip_crc,
- tcp_logging_array[entry].new_ip_crc,
- tcp_logging_array[entry].old_tcp_crc,
- tcp_logging_array[entry].new_tcp_crc);
- }
-}
-
-/*
- * Function to enable TCP logging
- */
-void
-tcp_debug_logging_enable_disable (u32 enable_flag)
-{
- switch (enable_flag) {
-
- case TCP_LOGGING_DISABLE:
- if (tcp_logging_enable_flag == TCP_LOGGING_DISABLE) {
- printf("\nTCP Logging ALREADY DISABLED\n");
- } else {
- printf("\nTCP Logging DISABLED\n");
- }
- tcp_logging_enable_flag = 0;
- break;
-
- case TCP_LOGGING_ENABLE:
- if (tcp_logging_enable_flag == TCP_LOGGING_ENABLE) {
- printf("\nTCP Logging ALREADY ENABLED\n");
- } else {
- tcp_logging_enable_flag = 1;
- tcp_logging_count = 0;
- tcp_logging_overflow = 0;
-
- printf("\nTCP Logging ENABLED\n");
- }
- break;
-
- case TCP_LOGGING_PACKET_DUMP:
- tcp_debug_logging_dump();
- break;
-
- case TCP_LOGGING_SUMMARY_DUMP:
- default:
- printf("\ntcp_logging_enable_flag %d, tcp_log_count %d\n",
- tcp_logging_enable_flag, tcp_logging_count);
- printf("To Enable TCP LOGGING provide a flag value of %d\n",
- TCP_LOGGING_ENABLE);
- break;
- }
-}
-
-void hex_dump (u8 * p, int len) {
- int i;
- for (i=0;i<len;i++) {
- if(i && (i & 0x3 ) == 0) printf(" ");
- if(i && (i & 0xf ) == 0) printf("\n");
- PLATFORM_DEBUG_PRINT("%02X ", p[i]);
- }
- PLATFORM_DEBUG_PRINT("\n");
-}
-
-void
-print_icmp_pkt (ipv4_header *ip)
-{
- u32 i, total_len;
-
- u8 *pkt = (u8 *) ip;
-
- total_len = clib_net_to_host_u16(ip->total_len_bytes);
-
- printf("\n======== PRINTING PKT START======\n");
- printf("======== IP PACKET LEN %d ===========\n", total_len);
- for (i=0; i < 20; i++) {
- printf(" %02X ", *(pkt + i));
- }
-
- printf("\n======== ICMP HEADER =================\n");
- for (i=20; i < 28; i++) {
- printf(" %02X ", *(pkt + i));
- }
-
- printf("\n======== ICMP BODY ===================\n");
- for (i=28; i < total_len; i++) {
- printf(" %02X ", *(pkt + i));
- }
-
- printf("\n======== PRINTING PKT END =======\n");
-}
-
-void
-print_udp_pkt (ipv4_header *ip)
-{
- u32 i, total_len, udp_len;
-
- u8 *pkt = (u8 *) ip;
-
- total_len = clib_net_to_host_u16(ip->total_len_bytes);
- udp_len = total_len - 20;
-
- printf("\n======== PRINTING PKT START======\n");
- printf("======== IP PACKET LEN %d ===========\n", total_len);
- for (i=0; i < 20; i++) {
- printf(" %02X ", *(pkt + i));
- }
- printf("\n======== UDP PSEUDO HEADER ==========\n");
- for (i=12; i < 20; i++) {
- printf(" %02X ", *(pkt + i));
- }
- printf(" 00 11 %02X %02X ", udp_len >> 8, udp_len & 0xff);
-
- printf("\n======== UDP HEADER =================\n");
- for (i=20; i < 28; i++) {
- printf(" %02X ", *(pkt + i));
- }
- printf("\n======== UDP BODY ===================\n");
- for (i=28; i < total_len; i++) {
- printf(" %02X ", *(pkt + i));
- }
-
- printf("\n======== PRINTING PKT END =======\n");
-}
-
-void
-print_tcp_pkt (ipv4_header *ip)
-{
- u32 i, total_len, tcp_len;
-
- u8 *pkt = (u8 *) ip;
-
- total_len = clib_net_to_host_u16(ip->total_len_bytes);
- tcp_len = total_len - 20;
-
- printf("\n======== PRINTING PKT START======\n");
- printf("======== IP PACKET LEN %d ===========\n", total_len);
- for (i=0; i < 20; i++) {
- printf(" %02X ", *(pkt + i));
- }
- printf("\n======== TCP PSEUDO HEADER ==========\n");
- for (i=12; i < 20; i++) {
- printf(" %02X ", *(pkt + i));
- }
- printf(" 00 06 %02X %02X ", tcp_len >> 8, tcp_len & 0xff);
-
- printf("\n======== TCP HEADER =================\n");
- for (i=20; i < 40; i++) {
- printf(" %02X ", *(pkt + i));
- }
- printf("\n======== TCP BODY ===================\n");
- for (i=40; i < total_len; i++) {
- printf(" %02X ", *(pkt + i));
- }
-
- printf("\n======== PRINTING PKT END =======\n");
-}
-
-/* IN: ipv4 and tcp header pointer,
- * new ipv4 addr and port value
- * main db index for accessing per vrf mss value
- * DO:
- * NAT
- * mss adjust if needed
- * ip & tcp checksum update (incremental)
- */
-
-inline void tcp_in2out_nat_mss_n_checksum (ipv4_header * ip,
- tcp_hdr_type * tcp,
- u32 ipv4_addr,
- u16 port,
- cnat_main_db_entry_t * db)
-{
- u8 *mss_ptr;
- u8 check_mss = 0;
- u16 mss_old, mss_new;
- cnat_vrfmap_t * vrf_map_p;
-
- cnat_v4_recalculate_tcp_checksum(ip,
- tcp,
- &(ip->src_addr),
- &(tcp->src_port),
- ipv4_addr,
- port);
- u16 frag_offset =
- clib_net_to_host_u16(ip->frag_flags_offset);
-
- if(PREDICT_FALSE(frag_offset & IP_FRAG_OFFSET_MASK)) {
- return; /* No TCP Header at all */
- }
-
- /*
- * check SYN bit and if options field is present
- * If yes, proceed to extract the options and get TCP MSS value
- */
- check_mss = ((tcp->flags & TCP_FLAG_SYN) &&
- (((tcp->hdr_len>>4) << 2) > sizeof(tcp_hdr_type)));
-
- if (PREDICT_FALSE(check_mss)) {
-
- /* get per VRF mss config */
- if(PREDICT_FALSE(db->flags & (CNAT_DB_DSLITE_FLAG))) {
- mss_new = dslite_table_db_ptr[db->dslite_nat44_inst_id].tcp_mss;
- } else {
- vrf_map_p = cnat_map_by_vrf + db->vrfmap_index;
- mss_new = vrf_map_p->tcp_mss;
- }
- DSLITE_PRINTF(1, "Check MSS true..%u\n", mss_new);
- /*
- * If TCP MSS is not configured, skip the MSS checks
- */
- if (PREDICT_FALSE(mss_new != V4_TCP_MSS_NOT_CONFIGURED_VALUE)) {
-
- /* if mss_ptr != NULL, then it points to MSS option */
- mss_ptr = tcp_findoption(tcp, TCP_OPTION_MSS);
-
- /*
- * TCP option field: | kind 1B | len 1B | value 2B|
- * where kind != [0,1]
- */
- if (PREDICT_TRUE(mss_ptr && (mss_ptr[1] == 4))) {
-
- u16 *ptr = (u16*)(mss_ptr + 2);
-
- mss_old = clib_net_to_host_u16(*ptr);
-
- if (PREDICT_FALSE(mss_old > mss_new)) {
- u32 sum32;
- u16 mss_old_r, old_tcp_checksum_r;
-
- *ptr = clib_host_to_net_u16(mss_new);
-
- mss_old_r = ~mss_old;
-
- old_tcp_checksum_r =
- ~clib_net_to_host_u16(tcp->tcp_checksum);
-
- /*
- * Revise the TCP checksum
- */
- sum32 = old_tcp_checksum_r + mss_old_r + mss_new;
- FILL_CHECKSUM(tcp->tcp_checksum, sum32)
-
- if (PREDICT_FALSE(tcp_logging_enable_flag)) {
- tcp_debug_logging(
- clib_net_to_host_u32(tcp->seq_num),
- clib_net_to_host_u32(tcp->ack_num),
- 0,
- 0,
- mss_old,
- mss_new,
- 0,
- 0,
- ~old_tcp_checksum_r,
- clib_net_to_host_u16(tcp->tcp_checksum));
- }
- }
- }
- }
- }
-}
-
-u32 get_my_svi_intf_ip_addr() {
- return 0x01010101;
-}