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678db7c80b
Working chaos-over-ether implementation (in addition to Chaos-over-UDP). Also rename dpchudp => dpchaos, both in code, files and the device process, since it no longer only supports Chaos-over-UDP, but is more generic. Update doc for CH11.
134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/* DPCHAOS.H - Definitions for CHAOS process
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*/
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/* Copyright © 2005 Björn Victor and Kenneth L. Harrenstien
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** All Rights Reserved
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**
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** This file may become part of the KLH10 Distribution. Use, modification, and
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** re-distribution is permitted subject to the terms in the file
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** named "LICENSE", which contains the full text of the legal notices
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** and should always accompany this Distribution.
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**
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** This software is provided "AS IS" with NO WARRANTY OF ANY KIND.
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**
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** This notice (including the copyright and warranty disclaimer)
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** must be included in all copies or derivations of this software.
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*/
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#ifndef DPCHAOS_INCLUDED
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#define DPCHAOS_INCLUDED 1
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#ifndef DPSUP_INCLUDED
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# include "dpsup.h"
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#endif
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#ifndef OSDNET_INCLUDED
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# include "osdnet.h"
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#endif
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/* Version of DPCHAOS-specific shared memory structure */
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#define DPCHAOS_VERSION DPC_VERSION(2,0,0) /* 2.0.0 */
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#define IFNAM_LEN PATH_MAX /* at least IFNAMSIZ! */
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#ifndef DPCHAOS_CHIP_MAX
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# define DPCHAOS_CHIP_MAX 10
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#endif
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/* Chaos ARP list */
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// @@@@ implement something to show the table
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#define CHARP_MAX 16
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#define CHARP_MAX_AGE (60*5) // ARP cache limit
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struct charp_ent {
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u_char charp_eaddr[ETHER_ADDR_LEN];
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u_short charp_chaddr;
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time_t charp_age;
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};
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/* If a dynamically added CHIP entry is older than this (seconds), it can get updated */
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#ifndef DPCHAOS_CHIP_DYNAMIC_AGE_LIMIT
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# define DPCHAOS_CHIP_DYNAMIC_AGE_LIMIT (60*5)
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#endif
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/* Chaos/IP mapping entry - see ch_chip */
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struct dpchaos_chip {
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unsigned int dpchaos_chip_chaddr; /* Chaos address */
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struct in_addr dpchaos_chip_ipaddr; /* IP address */
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in_port_t dpchaos_chip_ipport; /* IP port */
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time_t dpchaos_chip_lastrcvd; /* When last received, if dynamically added */
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};
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/* DPCHAOS-specific stuff */
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/* C = controlling parent sets, D = Device proc sets */
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/* If both, 1st letter indicates inital setter */
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struct dpchaos_s {
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struct dpc_s dpchaos_dpc; /* CD Standard DPC portion */
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int dpchaos_ver; /* C Version of shared struct */
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int dpchaos_attrs; /* C Attribute flags */
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char dpchaos_ifnam[IFNAM_LEN]; /* CD Interface name if any */
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char dpchaos_ifmeth[16]; /* C Interface method */
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int dpchaos_ifmeth_chudp; /* C Interface method is CHUDP? */
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unsigned short dpchaos_myaddr; /* C my Chaos address */
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unsigned char dpchaos_eth[6]; /* CD Ethernet address of interface */
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/* probably not used */
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int dpchaos_inoff; /* C Offset in buffer of input (I->H) data */
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int dpchaos_outoff; /* D Offset in buffer of output (H->I) data */
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int dpchaos_backlog; /* C Max sys backlog of rcvd packets */
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int dpchaos_dedic; /* C TRUE if dedicated ifc, else shared */
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in_port_t dpchaos_port; /* C port for CHUDP protocol */
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/* Chaos/IP mapping */
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int dpchaos_chip_tlen; /* C table length */
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struct dpchaos_chip dpchaos_chip_tbl[DPCHAOS_CHIP_MAX];
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// ARP table
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struct charp_ent charp_list[CHARP_MAX]; /* D arp table */
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int charp_len; /* D arp table length */
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};
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/* Buffer offset:
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CHUDP protocol header is 4 bytes; read/write data after those
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*/
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struct chudp_header {
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char chudp_version;
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char chudp_function;
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char chudp_arg1;
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char chudp_arg2;
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};
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/* CHUDP protocol port - should perhaps be registered? */
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#define CHUDP_PORT 42042
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/* Protocol version */
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#define CHUDP_VERSION 1
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/* Protocol function codes */
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#define CHUDP_PKT 1 /* Chaosnet packet */
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#ifndef ETHERTYPE_CHAOS
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# define ETHERTYPE_CHAOS 0x0804
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#endif
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// old names for new, new names for old?
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#ifndef ARPOP_RREQUEST
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#define ARPOP_RREQUEST ARPOP_REVREQUEST // 3 /* request protocol address given hardware */
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#endif
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#ifndef ARPOP_RREPLY
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#define ARPOP_RREPLY ARPOP_REVREPLY // 4 /* response giving protocol address */
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#endif
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#include "dvch11.h"
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#define DPCHAOS_CHUDP_DATAOFFSET (sizeof(struct chudp_header)) // 4 bytes
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#define DPCHAOS_ETHER_DATAOFFSET (sizeof(struct ether_header)) // 6+6+2=16 bytes
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// room for protocol header + Chaos header + max Chaos data + Chaos hw trailer
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#define DPCHAOS_MAXLEN (DPCHAOS_ETHER_DATAOFFSET+CHAOS_HEADERSIZE+CHAOS_MAXDATA+CHAOS_HW_TRAILERSIZE+42) /* some slack */
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#define DPCHAOS_CH_DESTOFF 4 /* offset to dest addr in chaos pkt */
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#define DPCHAOS_CH_FC 2 /* offset to forwarding count */
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/* Commands to and from DP and KLH10 CH11 driver */
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/* From 10 to DP */
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#define DPCHAOS_RESET 0 /* Reset DP */
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#define DPCHAOS_SPKT 1 /* Send data packet to ethernet */
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/* From DP to 10 */
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#define DPCHAOS_INIT 1 /* DP->10 Finished init */
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#define DPCHAOS_RPKT 2 /* DP->10 Received data packet from net */
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#endif /* ifndef DPCHUDP_INCLUDED */
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