ea3e1fc875
directory and GNU autotools setup. Change-Id: I6c59d1297389c9413db0c0b9bdf3b759080bf1b8 Signed-off-by: Ole Troan <ot@cisco.com>
134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
/*
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*------------------------------------------------------------------
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* cnat_v4_ftp_alg.h
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*
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* Copyright (c) 2012-2013 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*------------------------------------------------------------------
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*/
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#ifndef __CNAT_V4_FTP_ALG_H__
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#define __CNAT_V4_FTP_ALG_H__
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#include <vlib/vlib.h>
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#include <vnet/vnet.h>
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#include "tcp_header_definitions.h"
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#include "dslite_defs.h"
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#include "dslite_db.h"
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/* shorter form of byte order functions */
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#define net2host16(x) clib_net_to_host_u16( x)
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#define net2host32(x) clib_net_to_host_u32( x)
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#define net2host64(x) clib_net_to_host_u64( x)
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#define host2net16(x) clib_host_to_net_u16(x)
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#define host2net32(x) clib_host_to_net_u32(x)
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#define host2net64(x) clib_host_to_net_u64(x)
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//#define BIGENDIAN
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typedef struct iphdrtype_ {
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u8 v_ihl; /* version and IP header length */
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u8 tos; /* type of service */
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u16 tl; /* total length */
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u16 id; /* identifier */
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u16 ipreserved: 1;
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u16 dontfragment: 1;
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u16 morefragments: 1;
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u16 fo: 13; /* fragment offset */
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u8 ttl; /* time to live */
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u8 prot; /* protocol type */
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u16 checksum; /* checksum */
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u32 srcadr; /* IP source address */
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u32 dstadr; /* IP destination address */
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} iphdrtype;
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typedef struct tcptype_ {
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u16 sourceport;
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u16 destinationport;
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u32 sequencenumber;
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u32 acknowledgementnumber;
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u8 dataoffset;
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u8 flags;
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#if 0
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/* bypass the ENDIAN part */
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#ifdef BIGENDIAN
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u8 reserved: 2;
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u8 urg: 1;
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u8 ack: 1;
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u8 psh: 1;
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u8 rst: 1;
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u8 syn: 1;
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u8 fin: 1;
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#else
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u8 fin: 1;
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u8 syn: 1;
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u8 rst: 1;
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u8 psh: 1;
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u8 ack: 1;
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u8 urg: 1;
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u8 reserved2: 2;
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#endif
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#endif
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u16 window;
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u16 checksum;
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u16 urgentpointer;
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u8 data[0];
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} tcptype ;
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int watch_ftp_port_cmd (iphdrtype *ip,
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tcptype *tcp,
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u32 * ip_addr,
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u16 * port);
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u8 * ftp_test_pkt_gen (u32 ip_addr, u16 port);
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int update_ftp_port(u8 * pkt, u32 new_ip, u16 new_port, i8 * delta,
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cnat_main_db_entry_t *db_tcp_control,
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dslite_table_entry_t *dslite_entry_ptr,
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ipv6_header_t *ipv6_hdr);
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/*
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* caller needs to check if it's a ftp packet
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* this function returns 1
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* if packet being updated for PORT
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* otherwise return 0.
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* Assume IP header DOES NOT have option fields
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*/
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int cnat_ftp_alg ( u8* pkt, i8 * delta, cnat_main_db_entry_t *db,
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dslite_table_entry_t *dslite_entry_ptr,
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ipv6_header_t *ipv6_hdr);
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#define FTP_ALG_DEBUG_PRINTF_ENABLED 1
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#ifdef FTP_ALG_DEBUG_PRINTF_ENABLED
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#define FTP_ALG_DEBUG_PRINTF(...) { \
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if (global_debug_flag & CNAT_DEBUG_FTP_ALG) { \
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printf(__VA_ARGS__); \
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} }
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#else
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#define FTP_ALG_DEBUG_PRINTF(...)
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#endif
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#endif /* __CNAT_V4_FTP_ALG_H__ */
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