diff options
Diffstat (limited to 'vpp/plugins/vcgn-plugin/vcgn/cnat_v4_tcp_in2out_stages.c')
| -rw-r--r-- | vpp/plugins/vcgn-plugin/vcgn/cnat_v4_tcp_in2out_stages.c | 679 |
1 files changed, 679 insertions, 0 deletions
diff --git a/vpp/plugins/vcgn-plugin/vcgn/cnat_v4_tcp_in2out_stages.c b/vpp/plugins/vcgn-plugin/vcgn/cnat_v4_tcp_in2out_stages.c new file mode 100644 index 00000000..220ced46 --- /dev/null +++ b/vpp/plugins/vcgn-plugin/vcgn/cnat_v4_tcp_in2out_stages.c @@ -0,0 +1,679 @@ +/* + *--------------------------------------------------------------------------- + * cnat_v4_tcp_in2out_stages.c - cnat_v4_tcp_in2out 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 <cnat_feature_data.h> */ +#include "ipv4_packet.h" +#include "tcp_header_definitions.h" +#include "cnat_config.h" +#include "cnat_global.h" +#include "cnat_v4_functions.h" +#include "cnat_v4_ftp_alg.h" +#include "cnat_v4_pptp_alg.h" + +#define foreach_cnat_ipv4_tcp_inside_input_error \ +_(TCP_NAT_IN, "packets received") \ +_(TCP_NAT, "packets NATed") \ +_(TCP_EXCEPTION, "packets to exception") \ +_(TCP_TTL_GEN, "Generated TTL Expiry ICMP packet") \ +_(TCP_TTL_DROP, "Could not generate TTL Expiry ICMP packet") \ +_(TCP_SESSION_DROP, "Could not generate session") \ +_(TCP_FRAG_DROP, "Non-first Fragment received") + +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 cnat_v4_tcp_in2out_pipeline_data_ { + spp_node_main_vector_t *nmv; + /* Add additional pipeline stage data here... */ + u32 bucket; + u16 src_port; /* Added for handling fragments */ + u16 dst_port; /* Added for handling fragments */ +} cnat_v4_tcp_in2out_pipeline_data_t; + +static cnat_v4_tcp_in2out_pipeline_data_t pctx_data[SPP_MAXDISPATCH]; + +#define EXTRA_PIPELINE_ARGS_PROTO , cnat_v4_tcp_in2out_pipeline_data_t *pctx +#define EXTRA_PIPELINE_ARGS , pctx + +ALWAYS_INLINE( +static inline void +stage0(spp_ctx_t **ctxs, int index, spp_node_t *np, + u8 *disp_used EXTRA_PIPELINE_ARGS_PROTO)) +{ + spp_ctx_t *ctx = ctxs[index]; + /* + * Prefetch the context header. This is almost always + * the right thing to do + */ + SPP_PREFETCH_CTX(ctx); +} + +ALWAYS_INLINE( +static inline void +stage1(spp_ctx_t **ctxs, int index, spp_node_t *np, + u8 *disp_used EXTRA_PIPELINE_ARGS_PROTO)) +{ + spp_ctx_t *ctx = ctxs[index]; + /* got ctx, prefetch packet data separately */ + SPP_PREFETCH_CTX_DATA(ctx, 1*CACHE_DATA_QUANTUM); +} + +ALWAYS_INLINE( +static inline void +stage2(spp_ctx_t **ctxs, int index, spp_node_t *np, + u8 *disp_used EXTRA_PIPELINE_ARGS_PROTO)) +{ + spp_ctx_t *ctx = ctxs[index]; + u64 a, b, c; + u32 bucket; + cnat_feature_data_t *fd = (cnat_feature_data_t *)ctx->feature_data; + ipv4_header *ip; + tcp_hdr_type * tcp; + u8 *prefetch_target; + + INCREMENT_NODE_COUNTER(np, TCP_NAT_IN); + + /* extract the key from ctx and save it to feature_data */ + + ip = (ipv4_header *)(ctx->current_header); + ctx->application_start = (ip->version_hdr_len_words & 0xf) << 2; + tcp = (tcp_hdr_type*) ((u8 *)ip + ctx->application_start); + + PLATFORM_CNAT_SET_RX_VRF(ctx,fd->dbl.k.k.vrf, CNAT_TCP, 1); + fd->dbl.k.k.ipv4 = spp_net_to_host_byte_order_32(&ip->src_addr); + + if(PREDICT_FALSE(ctx->ru.rx.frag)) { + /* Must have routed through cnat_v4_frag_in2out node + * Since feature data of the ctx is being used for other + * purposes here, copy them to extra stage argument + */ + u16 *feature_data_ports = (u16 *)&ctx->feature_data[2]; + pctx[index].src_port = fd->dbl.k.k.port = *feature_data_ports; + feature_data_ports++; + pctx[index].dst_port = *feature_data_ports; + } else { + fd->dbl.k.k.port = spp_net_to_host_byte_order_16(&tcp->src_port); + pctx[index].dst_port = + spp_net_to_host_byte_order_16(&tcp->dest_port); + } + +#if 0 + /* extra info for evil mode, or default value for dst_ipv4 field in good mode */ + fd->dbl.dst_ipv4 = address_dependent_filtering ? + spp_net_to_host_byte_order_32(&ip->dest_addr) : 0; +#endif + + CNAT_V4_GET_HASH(fd->dbl.k.key64, + bucket, CNAT_MAIN_HASH_MASK) + + prefetch_target = (u8 *)(&cnat_in2out_hash[bucket]); + pctx[index].bucket = bucket; + + /* Prefetch the hash bucket */ + SPP_PREFETCH(prefetch_target, 0, LOAD); + +} + +ALWAYS_INLINE( +static inline void +stage3(spp_ctx_t **ctxs, int index, spp_node_t *np, + u8 *disp_used EXTRA_PIPELINE_ARGS_PROTO)) +{ + u32 db_index; + u32 bucket; + uword prefetch_target0, prefetch_target1; + + bucket = pctx[index].bucket; + + /* read the hash bucket */ + db_index = pctx[index].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); + + SPP_PREFETCH(prefetch_target0, 0, 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)))) { + + SPP_PREFETCH(prefetch_target1, 0, LOAD); + + } + } +} + +static inline void +stage4(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; + cnat_main_db_entry_t *db; + cnat_feature_data_t *fd; + + /* + * Note: if the search already failed (empty bucket), + * the answer is already in the pipeline context structure + */ + if (PREDICT_FALSE(db_index == EMPTY)) { + return; + } + + fd = (cnat_feature_data_t *)ctx->feature_data; + + /* + * 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 == fd->dbl.k.key64)) + break; + db_index = db->in2out_hash.next; + + } while (db_index != EMPTY); + + /* even in evil mode, for in2out, we nat all packets regardless mode and dst_ip */ + + /* Stick the answer back into the pipeline context structure */ + pctx[index].bucket = db_index; +} + +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; + cnat_feature_data_t *fd = (cnat_feature_data_t *)ctx->feature_data; + int disposition; + cnat_main_db_entry_t *db; + /* Below two pointers are just to keep the cnat_ftp_alg call happy*/ + dslite_table_entry_t *dslite_entry_ptr = NULL; + ipv6_header_t *ipv6_hdr = NULL; + tcp_hdr_type *tcp; + ipv4_header *ip; + i8 delta; + u32 seq, seq1; + u32 window; + u8 scale; + int rc; + + ip = (ipv4_header *) ctx->current_header; + + 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; + INCREMENT_NODE_COUNTER(np, TCP_TTL_GEN); + } else { + /* Could not generated ICMP - drop the packet */ + disposition = CNAT_DROP; + INCREMENT_NODE_COUNTER(np, TCP_TTL_DROP); + } + goto drop_pkt; + } + } + + if (PREDICT_FALSE(db_index == EMPTY)) { + if(PREDICT_FALSE(ctx->ru.rx.frag)) { + /* Must have routed through cnat_v4_frag_in2out node */ + u16 frag_offset = + spp_net_to_host_byte_order_16(&(ip->frag_flags_offset)); + if(PREDICT_FALSE(frag_offset & IP_FRAG_OFFSET_MASK)) { + INCREMENT_NODE_COUNTER(np, TCP_FRAG_DROP); + disposition = CNAT_DROP; + goto drop_pkt; + } else { + INCREMENT_NODE_COUNTER(np, TCP_EXCEPTION); + disposition = CNAT_V4_TCP_IE; + } + } else { + INCREMENT_NODE_COUNTER(np, TCP_EXCEPTION); + disposition = CNAT_V4_TCP_IE; + } + } else { + cnat_key_t dest_info; + cnat_session_entry_t *session_db = NULL; + db = cnat_main_db + db_index; + /* Handle destination sessions */ + tcp = (tcp_hdr_type*) ((u8*)ip + ctx->application_start); + dest_info.k.port = pctx[index].dst_port; + dest_info.k.ipv4 = spp_net_to_host_byte_order_32(&(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_DROP; + INCREMENT_NODE_COUNTER(np, TCP_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_DROP; + INCREMENT_NODE_COUNTER(np, TCP_SESSION_DROP); + goto drop_pkt; + } + } + if(PREDICT_TRUE(session_db)) { + /* Have to repeat the window size check for new destinations */ + window = (u32)spp_net_to_host_byte_order_16( + &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 = spp_net_to_host_byte_order_32( + &tcp->seq_num); + session_db->ack_no = spp_net_to_host_byte_order_32( + &tcp->ack_num); + if (PREDICT_FALSE(global_debug_flag && CNAT_DEBUG_GLOBAL_ALL)) { + PLATFORM_DEBUG_PRINT("\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); + } + } + } 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)spp_net_to_host_byte_order_16( + &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 = + spp_net_to_host_byte_order_32( + &tcp->seq_num); + db->proto_data.tcp_seq_chk.ack_no = + spp_net_to_host_byte_order_32( + &tcp->ack_num); + } + if (PREDICT_FALSE(db->diff_window < window)) { + /* Update the db entry with window option from packet */ + db->diff_window = window; + } + if (PREDICT_FALSE(global_debug_flag && CNAT_DEBUG_GLOBAL_ALL)) { + PLATFORM_DEBUG_PRINT("\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); + PLATFORM_DEBUG_PRINT("\n In2out MAINDB window = %u\n", + db->diff_window); + } + } +update_pkt: + + INCREMENT_NODE_COUNTER(np, TCP_NAT); + + disposition = CNAT_REWRITE_OUTPUT; + + /* NAT the packet and update checksum (increamental) */ + + /* If it is a non-first fragment, we need not worry about + * ALGs as the packet does not have TCP header.. + * However, under a very race scenario when this non-first + * fragment is containing an FTP PORT command OR RTSP command + * we cannot handle that case.. in that case the ALG will fail + * Do not want to add a lot of complexity to handle one in million + * of such ALG case + */ + u16 frag_offset = + spp_net_to_host_byte_order_16(&(ip->frag_flags_offset)); + + if(PREDICT_FALSE(frag_offset & IP_FRAG_OFFSET_MASK)) { + /* Non first fragment.. no TCP header */ + FTP_ALG_DEBUG_PRINTF("Non first frag.. cannot handle ALG"); + goto handle_ttl_n_checksum; + } + + FTP_ALG_DEBUG_PRINTF("src port 0x%x, dst_port 0x%x", + spp_net_to_host_byte_order_16(&tcp->src_port), + spp_net_to_host_byte_order_16(&tcp->dest_port)) + + /* handle FTP ALG */ + if (PREDICT_FALSE(ftp_alg_enabled && + (spp_net_to_host_byte_order_16(&tcp->src_port) == 21 || + spp_net_to_host_byte_order_16(&tcp->dest_port) == 21))) { + + if(PREDICT_FALSE((db->flags & CNAT_DB_FLAG_PPTP_TUNNEL_ACTIVE) || + (db->flags & CNAT_DB_FLAG_PPTP_TUNNEL_INIT))) + { + /* FTP on a PPTP Control session? Ignore FTP */ + goto handle_ttl_n_checksum; + } + + if (PREDICT_FALSE(tcp->flags & (TCP_FLAG_SYN | TCP_FLAG_RST | + TCP_FLAG_FIN))) { + + FTP_ALG_DEBUG_PRINTF("SYN Case setting delta = 0") + + /* reset the delta */ + if(PREDICT_FALSE(session_db != NULL)) { + session_db->alg.delta = 0; + } else { + db->alg.delta = 0; + } + + } else { + + /* need to adjust seq # for in2out pkt if delta is not 0 */ + if (PREDICT_TRUE((session_db && (session_db->alg.delta != 0)) + || ((!session_db) && (db->alg.delta != 0)))) { + seq = net2host32(&tcp->seq_num); + + FTP_ALG_DEBUG_PRINTF("Orig Seq Num 0x%x", seq) + /* + * for ftp packets, due to PORT command translation, + * we may have cases that a packet/payload len gets + * changed for tcp, we need to adjust the packet's + * sequence numbers to match the changes. The delta + * of orig pkt len and new len is in alg_dlt[1] together + * with the sequence number that cuased the delta. When + * there are multiple len changes, we keep theprevious + * delta in alg_dlt[0] for case like pkt retransmission. + * So depends on packet seq number, we decide to use + * either latest delta or previous delta ([0]) + * We won't be here if both delta values are 0 + */ + if(PREDICT_FALSE(session_db != NULL)) { + seq1 = seq > session_db->tcp_seq_num ? + (seq + session_db->alg.alg_dlt[1]): + (seq + session_db->alg.alg_dlt[0]); + } else { + seq1 = seq > db->proto_data.seq_pcp.tcp_seq_num ? + (seq + db->alg.alg_dlt[1]): + (seq + db->alg.alg_dlt[0]); + } + + FTP_ALG_DEBUG_PRINTF("Old_seq_num 0x%x New Seq Num 0x%x", + seq, seq1) + + if (PREDICT_TRUE(seq1 != seq)) { + + tcp->seq_num = host2net32(seq1); + + FTP_ALG_DEBUG_PRINTF("Old TCP Checksum 0x%x", + net2host16(&tcp->tcp_checksum)) + + /* + * fix checksum incremental for seq # changes + * newchecksum = ~(~oldchecksum + ~old + new) + */ + CNAT_UPDATE_TCP_SEQ_ACK_CHECKSUM(seq, seq1) + } /* There is a diff in seq */ + + } /* ALG Delta is non zero */ + + rc = cnat_ftp_alg((u8*) ip, &delta, db, dslite_entry_ptr, ipv6_hdr); + + FTP_ALG_DEBUG_PRINTF("cnat_ftp_alg rc 0x%x", rc) + + /*if located PORT cmd, packet being updated, take the delta and seq # */ + if (PREDICT_FALSE(rc)) { + + /* set alg flag for this ftp control connection */ + if(PREDICT_FALSE(session_db != NULL)) { + session_db->flags |= CNAT_DB_FLAG_ALG_CTRL_FLOW; + } else { + db->flags |= CNAT_DB_FLAG_ALG_CTRL_FLOW; + } + + /* + * rc != 0 indicates this packet has triggered a new pkt len delta + * we need to update db entry's seq# with seq# of this packet. + * + * Move alg_dlt[1] to [0], (current delta -> previous delta) + * then apply latest delta to alg_dlt[1] (keep [1] as latest delta) + */ + if(PREDICT_FALSE(session_db != NULL)) { + session_db->tcp_seq_num = net2host32(&tcp->seq_num); + session_db->alg.alg_dlt[0] = session_db->alg.alg_dlt[1]; + + /* accumulate the delta ! */ + session_db->alg.alg_dlt[1] += delta; + FTP_ALG_DEBUG_PRINTF( + "cnat_ftp_alg seq_num 0x%x, dlt0 0x%x, dlt1 0x%x", + session_db->tcp_seq_num, + session_db->alg.alg_dlt[0], + session_db->alg.alg_dlt[1]) + + } else { + db->proto_data.seq_pcp.tcp_seq_num = net2host32(&tcp->seq_num); + db->alg.alg_dlt[0] = db->alg.alg_dlt[1]; + + /* accumulate the delta ! */ + db->alg.alg_dlt[1] += delta; + + FTP_ALG_DEBUG_PRINTF( + "cnat_ftp_alg seq_num 0x%x, dlt0 0x%x, dlt1 0x%x", + db->proto_data.seq_pcp.tcp_seq_num, + db->alg.alg_dlt[0], + db->alg.alg_dlt[1]) + } + ctx->current_length += delta; + }/* cnat_ftp_alg returned non zero */ + } /* It is not a SYN, RST or FIN */ + } else if (PREDICT_FALSE(rtsp_alg_port_num && + ((spp_net_to_host_byte_order_16(&tcp->dest_port) == rtsp_alg_port_num) || + (spp_net_to_host_byte_order_16(&tcp->src_port) == rtsp_alg_port_num))) ) { + + if (PREDICT_FALSE(tcp->flags & (TCP_FLAG_SYN | TCP_FLAG_RST | + TCP_FLAG_FIN))) { + + FTP_ALG_DEBUG_PRINTF("SYN Case setting delta = 0") + + /* reset the delta */ + if(PREDICT_FALSE(session_db != NULL)) { + session_db->alg.delta = 0; + } else { + db->alg.delta = 0; + } + + } else { +#define RTSP_ALG_DELTA_MASK 0xFF + /* need to adjust seq # for in2out pkt if delta is not 0 */ + if (PREDICT_FALSE((session_db && + (session_db->alg.delta & RTSP_ALG_DELTA_MASK) != 0) || + ((!session_db) && + (db->alg.delta & RTSP_ALG_DELTA_MASK) != 0))) { + seq = net2host32(&tcp->seq_num); + + if(PREDICT_FALSE(session_db != NULL)) { + seq1 = seq > session_db->tcp_seq_num ? + (seq + db->alg.alg_dlt[1]): + (seq + db->alg.alg_dlt[0]); + } else { + seq1 = seq > db->proto_data.seq_pcp.tcp_seq_num ? + (seq + db->alg.alg_dlt[1]): + (seq + db->alg.alg_dlt[0]); + } + + FTP_ALG_DEBUG_PRINTF("Old_seq_num 0x%x New Seq Num 0x%x", + seq, seq1) + + if (PREDICT_TRUE(seq1 != seq)) { + + tcp->seq_num = host2net32(seq1); + + FTP_ALG_DEBUG_PRINTF("Old TCP Checksum 0x%x", + net2host16(&tcp->tcp_checksum)) + + /* + * fix checksum incremental for seq # changes + * newchecksum = ~(~oldchecksum + ~old + new) + */ + CNAT_UPDATE_TCP_SEQ_ACK_CHECKSUM(seq, seq1) + } + + } + } + if ((session_db && (!session_db->alg.il)) || + ((!session_db) && (!db->alg.il))) { + cnat_rtsp_alg((u8*) ip, + &delta, + db, + ctx->current_length, + NULL, + NULL); + } + } +handle_ttl_n_checksum: + 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); +/* CNAT_PPTP_ALG_SUPPORT */ + /* code to handle pptp control msgs */ + if(PREDICT_FALSE( + (spp_net_to_host_byte_order_16(&tcp->dest_port) == + TCP_PPTP_PORT))) { + + u32 ret; + + PPTP_DBG(3, "PPTP mgmt/ctrl msg recieved"); + + ret = cnat_handle_pptp_msg(ctx, db , tcp, PPTP_PNS ); + + if( PREDICT_FALSE( ret != CNAT_SUCCESS) ) { + PPTP_DBG(3, "PPTP mgmt/ctrl msg drop"); + disposition = CNAT_DROP; + PPTP_INCR(ctrl_msg_drops); + goto drop_pkt; + } + } + +/* CNAT_PPTP_ALG_SUPPORT */ + + /* update transaltion counters */ + db->in2out_pkts++; + + in2out_forwarding_count++; + + PLATFORM_CNAT_SET_TX_VRF(ctx,db->out2in_key.k.vrf); + + /* update the timer for good mode, or evil mode dst_ip match */ + +// if (!address_dependent_filtering || fd->dbl.dst_ipv4 == db->dst_ipv4) { + 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); + } + +// } + + } + + /* Pick up the answer and put it into the context */ + fd->dbl.db_index = db_index; + +drop_pkt: + + DISP_PUSH_CTX(np, ctx, disposition, disp_used, last_disposition, last_contexts_ptr, last_nused_ptr); + +} + |