355 lines
13 KiB
C
Executable File
355 lines
13 KiB
C
Executable File
/************************************************************************/
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/* */
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/* ***** ***** */
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/* ***** ***** */
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/* ***** ***** */
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/* ***** ***** */
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/* *************** *************** */
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/* ***************** ***************** */
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/* *************** *************** */
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/* ***** ***** TheNetNode */
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/* ***** ***** Portable */
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/* ***** ***** Network */
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/* ***** ***** Software */
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/* */
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/* File include/ip.h (maintained by: DG1KWA) */
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/* */
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/* This file is part of "TheNetNode" - Software Package */
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/* */
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/* Copyright (C) 1998 - 2008 NORD><LINK e.V. Braunschweig */
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/* */
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/* This program is free software; you can redistribute it and/or modify */
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/* it under the terms of the NORD><LINK ALAS (Allgemeine Lizenz fuer */
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/* Amateurfunk Software) as published by Hans Georg Giese (DF2AU) */
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/* on 13/Oct/1992; either version 1, or (at your option) any later */
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/* version. */
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/* */
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/* This program is distributed WITHOUT ANY WARRANTY only for further */
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/* development and learning purposes. See the ALAS (Allgemeine Lizenz */
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/* fuer Amateurfunk Software). */
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/* */
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/* You should have received a copy of the NORD><LINK ALAS (Allgemeine */
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/* Lizenz fuer Amateurfunk Software) along with this program; if not, */
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/* write to NORD><LINK e.V., Hinter dem Berge 5, D-38108 Braunschweig */
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/* */
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/* Dieses Programm ist PUBLIC DOMAIN, mit den Einschraenkungen durch */
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/* die ALAS (Allgemeine Lizenz fuer Amateurfunk Software), entweder */
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/* Version 1, veroeffentlicht von Hans Georg Giese (DF2AU), */
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/* am 13.Oct.1992, oder (wenn gewuenscht) jede spaetere Version. */
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/* */
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/* Dieses Programm wird unter Haftungsausschluss vertrieben, aus- */
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/* schliesslich fuer Weiterentwicklungs- und Lehrzwecke. Naeheres */
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/* koennen Sie der ALAS (Allgemeine Lizenz fuer Amateurfunk Software) */
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/* entnehmen. */
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/* */
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/* Sollte dieser Software keine ALAS (Allgemeine Lizenz fuer Amateur- */
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/* funk Software) beigelegen haben, wenden Sie sich bitte an */
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/* NORD><LINK e.V., Hinter dem Berge 5, D-38108 Braunschweig */
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/* */
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/************************************************************************/
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/* IP protocol field values */
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#define ICMP_PTCL 1 /* Internet Control Message Protocol */
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#define TCP_PTCL 6 /* Transmission Control Protocol */
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#define UDP_PTCL 17 /* User Datagram Protocol */
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#define RSPF_PTCL 73 /* Radio Shortest Path First Protocol */
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#define MAXTTL 255 /* Maximum possible IP time-to-live value */
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/* DoD-style precedences */
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#define ROUTINE 0x00
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#define PRIORITY 0x20
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#define IMMEDIATE 0x40
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#define FLASH 0x60
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#define FLASH_OVER 0x80
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#define CRITIC 0xa0
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#define INET_CTL 0xc0
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#define NET_CTL 0xe0
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/* Amateur-style precedences */
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#define AM_ROUTINE 0x00
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#define AM_WELFARE 0x20
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#define AM_PRIORITY 0x40
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#define AM_EMERGENCY 0x60
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/* Class-of-service bits */
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#define LOW_DELAY 0x10
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#define THROUGHPUT 0x08
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#define RELIABILITY 0x04
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/* IP TOS fields */
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#define PREC(x) ((x)>>5 & 7)
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#define DELAY 0x10
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#define THRUPUT 0x8
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#define RELIABLITY 0x4
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/* structure for an ip address (long) */
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typedef unsigned long ipaddr;
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/* Format of a MIB entry for statistics gathering */
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typedef struct mib_entry {
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const char *name;
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struct {
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unsigned int integer;
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} value;
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} MIB_ENTRY;
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#define TLB 30 /* Default reassembly timeout, sec */
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#define IPVERSION 4 /* IP-Version 4.0 */
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#define IP_MAXOPT 40 /* Largest option field, bytes */
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/* SNMP MIB variables, used for statistics and control. See RFC 1066 */
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#define ipForwarding Ip_mib[1].value.integer
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#define ipDefaultTTL Ip_mib[2].value.integer
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#define ipInReceives Ip_mib[3].value.integer
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#define ipInHdrErrors Ip_mib[4].value.integer
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#define ipInAddrErrors Ip_mib[5].value.integer
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#define ipForwDatagrams Ip_mib[6].value.integer
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#define ipInUnknownProtos Ip_mib[7].value.integer
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#define ipInDiscards Ip_mib[8].value.integer
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#define ipInDelivers Ip_mib[9].value.integer
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#define ipOutRequests Ip_mib[10].value.integer
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#define ipOutDiscards Ip_mib[11].value.integer
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#define ipOutNoRoutes Ip_mib[12].value.integer
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#define ipReasmTimeout Ip_mib[13].value.integer
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#define ipReasmReqds Ip_mib[14].value.integer
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#define ipReasmOKs Ip_mib[15].value.integer
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#define ipReasmFails Ip_mib[16].value.integer
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#define ipFragOKs Ip_mib[17].value.integer
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#define ipFragFails Ip_mib[18].value.integer
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#define ipFragCreates Ip_mib[19].value.integer
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#define NUMIPMIB 19
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/* IP header, INTERNAL representation */
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typedef struct ip_struct {
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unsigned char version; /* IP version number */
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unsigned char ihl; /* Internet Header Length */
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unsigned char tos; /* Type of service */
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unsigned length; /* Total length */
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unsigned id; /* Identification */
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unsigned offset; /* Fragment offset in bytes */
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struct {
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unsigned char df; /* Don't fragment flag */
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unsigned char mf; /* More Fragments flag */
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} flags;
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unsigned char ttl; /* Time to live */
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unsigned char protocol; /* Protocol */
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unsigned checksum; /* Header checksum */
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ipaddr source; /* Source address */
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ipaddr dest; /* Destination address */
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unsigned char options[IP_MAXOPT];/* Options field */
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unsigned optlen; /* Length of options field, bytes */
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} IP;
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#define TCP_MAXOPT 4 /* max Anzahl als Option-Bytes */
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typedef unsigned long SEQ;
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typedef unsigned long ACK;
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/* TCP header */
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typedef struct tcp_struct {
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unsigned srcPort; /* Source-Port */
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unsigned dstPort; /* Destination-POrt */
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SEQ seqnum; /* Sequence Number */
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ACK acknum; /* Acknowledgement Number */
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unsigned char data_offset; /* Data Offset 4 Bits */
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unsigned char res; /* reserviert */
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unsigned flags; /* Flags */
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unsigned window; /* Window */
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unsigned checksum; /* Checksum */
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unsigned urgentPointer; /* Urgent Pointer */
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unsigned char options[TCP_MAXOPT]; /* Options and Padding */
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} TCP;
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/* UDP header */
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typedef struct udp_struct {
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unsigned srcPort;
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unsigned dstPort;
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unsigned length;
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unsigned checksum;
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} UDP;
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#define NULLIP (IP *)NULL
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#define IPLEN 20 /* Length of standard IP header */
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/* Fields in option type byte */
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#define OPT_COPIED 0x80 /* Copied-on-fragmentation flag */
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#define OPT_CLASS 0x60 /* Option class */
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#define OPT_NUMBER 0x1f /* Option number */
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/* IP option numbers */
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#define IP_EOL 0 /* End of options list */
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#define IP_NOOP 1 /* No Operation */
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#define IP_SECURITY 2 /* Security parameters */
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#define IP_LSROUTE 3 /* Loose Source Routing */
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#define IP_TIMESTAMP 4 /* Internet Timestamp */
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#define IP_RROUTE 7 /* Record Route */
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#define IP_STREAMID 8 /* Stream ID */
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#define IP_SSROUTE 9 /* Strict Source Routing */
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/* Timestamp option flags */
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#define TS_ONLY 0 /* Time stamps only */
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#define TS_ADDRESS 1 /* Addresses + Time stamps */
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#define TS_PRESPEC 3 /* Prespecified addresses only */
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/* structure for routing tables */
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typedef struct iproute
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{
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struct iproute *nextip;
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struct iproute *previp;
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#ifdef BUFFER_DEBUG
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UBYTE owner; /* Muss an 9. Bytestelle stehen */
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#endif
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ipaddr dest;
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ipaddr gateway;
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unsigned metric;
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unsigned timer;
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unsigned char bits;
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#ifdef __WIN32__
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unsigned char Interface;
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#else
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unsigned char interface;
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#endif
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unsigned char flags;
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#define RTDYNAMIC 0x01 /* dynamic ip-address */
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unsigned char spare_byte;
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UBYTE port;
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BOOLEAN automatic_flag;
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} IP_ROUTE;
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#define NULLROUTE (IP_ROUTE *)NULL
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/* Cache for the last-used routing entry, speeds up the common case where
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* we handle a burst of packets to the same destination
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*/
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/*typedef struct rt_cache {
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ipaddr target;
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IP_ROUTE *route;
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} RT_CACHE;
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*/
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typedef struct arp_tab
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{
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struct arp_tab *nextar;
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struct arp_tab *prevar;
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#ifdef BUFFER_DEBUG
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UBYTE owner; /* Muss an 9. Bytestelle stehen */
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#endif
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ipaddr dest;
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unsigned timer;
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char dgmode;
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UBYTE hwtype;
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char publish_flag;
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char state;
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char callsign[7];
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char digi[15];
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WORD port;
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BOOLEAN automatic_flag;
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} ARP_TAB;
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#define NULLARP (ARP_TAB *)NULL
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#define ARP_NETROM 0
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#define ARP_AX25 3
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#define MAXHWALEN 10
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#define IPTYPE 42
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#define ARP_REQUEST 1
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#define ARP_REPLY 2
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#define REVARP_REQUEST 3
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#define REVARP_REPLY 4
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typedef struct arp
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{
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unsigned hardware;
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unsigned protocol;
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unsigned char hwalen;
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unsigned char pralen;
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unsigned opcode;
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unsigned char shwaddr[MAXHWALEN];
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ipaddr sprotaddr;
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unsigned char thwaddr[MAXHWALEN];
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ipaddr tprotaddr;
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} ARP;
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#define NULLBUF ( void * )NULL
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/* Pseudo-header for TCP and UDP checksumming */
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typedef struct pseudo_header {
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ipaddr source; /* IP source */
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ipaddr dest; /* IP destination */
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unsigned char protocol; /* Protocol */
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unsigned length; /* Data field length */
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} PSEUDO_HEADER;
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#define NULLHEADER (struct pseudo_header *)NULL
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#ifdef IPROUTE
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/* src/l7ip.c */
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void ccpipr(void);
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void showroute(IP_ROUTE *,MBHEAD *);
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void show_ip_addr(ipaddr,MBHEAD *);
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BOOLEAN get_ip_addr(ipaddr *,WORD *,char **);
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void ccparp(void);
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void showarp(ARP_TAB *,MBHEAD *);
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void ccpipa(void);
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void ccpipb(void);
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void ccpips(void);
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BOOLEAN rt_add(ipaddr,unsigned int ,ipaddr,int ,unsigned int ,unsigned int ,int, BOOLEAN);
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BOOLEAN route_find(IP_ROUTE **,ipaddr *,ipaddr,unsigned int );
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BOOLEAN rt_drop(ipaddr,unsigned int, BOOLEAN);
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BOOLEAN arp_add(ipaddr, WORD, char *, const char *, unsigned int,
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unsigned int, BOOLEAN, BOOLEAN);
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BOOLEAN find_arp(ARP_TAB * *,ipaddr, WORD );
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BOOLEAN arp_drop(ipaddr, WORD, BOOLEAN);
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void arpsrv(void);
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void ccpping(void);
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BOOLEAN l2toip(WORD);
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/* src/iproute.c */
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void ipinit(void );
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void ipserv(void );
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void ip_route(MBHEAD * );
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void arp_service(MBHEAD *);
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IP_ROUTE *rt_find(ipaddr);
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void nr_iface(MBHEAD *,ipaddr );
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void l2_iface(MBHEAD *,unsigned int ,ipaddr,unsigned int );
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ARP_TAB *res_arp(ipaddr, unsigned int );
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MBHEAD *htonip(IP *,MBHEAD *, BOOLEAN );
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int ip_send(ipaddr,ipaddr,unsigned ,unsigned ,unsigned ,MBHEAD *,unsigned short ,unsigned short ,unsigned );
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unsigned short eac(long );
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unsigned short cksum(PSEUDO_HEADER *,MBHEAD *,unsigned short );
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void arp_request(ipaddr,unsigned,unsigned);
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void arp_send( unsigned, char *);
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void ccp_ip_help(ipaddr *, const char *);
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BOOLEAN pingem(ipaddr target,int seq,int id, int len, char *opt);
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#define NR4_OP_PID 0
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#define NR_PROTO_IP 0x0c
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typedef struct ipportpar {
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WORD ipMode; /* Mode-Flags fuer diesen Port */
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#define ARP_OK 0x0001 /* ARP erlaubt */
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#define IP_FORWARDING 0x0002 /* das Weiterleiten von IP-Frames */
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WORD mtu; /* Maximale Blockgroesse */
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} IPPORTPAR;
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extern LHEAD arprxfl; /* Empfangene ARP-Frames */
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extern IPPORTPAR IPpar[]; /* fuer jeden L2-Port + NETROM */
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#define NETROM_PORT L2PNUM
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#ifdef KERNELIF
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#define KERNEL_PORT L2PNUM + 1
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#endif
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#define is_my_ip_addr( address ) ( address == my_ip_addr )
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#define is_broadcast_address( address ) ( bcast_ip_addr != 0 && bcast_ip_addr == address )
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#else
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#define l2toip(x) FALSE
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#endif /* IPROUTE */
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/* End of $RCSfile$ */
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