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Diffstat (limited to 'include/linux/if_arcnet.h')
| -rw-r--r-- | include/linux/if_arcnet.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/include/linux/if_arcnet.h b/include/linux/if_arcnet.h new file mode 100644 index 000000000000..af380cb876a0 --- /dev/null +++ b/include/linux/if_arcnet.h @@ -0,0 +1,137 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Global definitions for the ARCnet interface. + * + * Authors: David Woodhouse and Avery Pennarun + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _LINUX_IF_ARCNET_H +#define _LINUX_IF_ARCNET_H + +#include <linux/if_ether.h> + + +/* + * These are the defined ARCnet Protocol ID's. + */ + +/* CAP mode */ +/* No macro but uses 1-8 */ + +/* RFC1201 Protocol ID's */ +#define ARC_P_IP 212 /* 0xD4 */ +#define ARC_P_IPV6 196 /* 0xC4: RFC2497 */ +#define ARC_P_ARP 213 /* 0xD5 */ +#define ARC_P_RARP 214 /* 0xD6 */ +#define ARC_P_IPX 250 /* 0xFA */ +#define ARC_P_NOVELL_EC 236 /* 0xEC */ + +/* Old RFC1051 Protocol ID's */ +#define ARC_P_IP_RFC1051 240 /* 0xF0 */ +#define ARC_P_ARP_RFC1051 241 /* 0xF1 */ + +/* MS LanMan/WfWg "NDIS" encapsulation */ +#define ARC_P_ETHER 232 /* 0xE8 */ + +/* Unsupported/indirectly supported protocols */ +#define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */ +#define ARC_P_DATAPOINT_MOUNT 1 +#define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */ +#define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */ +#define ARC_P_LANSOFT 251 /* 0xFB - what is this? */ +#define ARC_P_ATALK 0xDD + +/* Hardware address length */ +#define ARCNET_ALEN 1 + +/* + * The RFC1201-specific components of an arcnet packet header. + */ +struct arc_rfc1201 +{ + uint8_t proto; /* protocol ID field - varies */ + uint8_t split_flag; /* for use with split packets */ + uint16_t sequence; /* sequence number */ + uint8_t payload[0]; /* space remaining in packet (504 bytes)*/ +}; +#define RFC1201_HDR_SIZE 4 + + +/* + * The RFC1051-specific components. + */ +struct arc_rfc1051 +{ + uint8_t proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */ + uint8_t payload[0]; /* 507 bytes */ +}; +#define RFC1051_HDR_SIZE 1 + + +/* + * The ethernet-encap-specific components. We have a real ethernet header + * and some data. + */ +struct arc_eth_encap +{ + uint8_t proto; /* Always ARC_P_ETHER */ + struct ethhdr eth; /* standard ethernet header (yuck!) */ + uint8_t payload[0]; /* 493 bytes */ +}; +#define ETH_ENCAP_HDR_SIZE 14 + + +struct arc_cap +{ + uint8_t proto; + uint8_t cookie[sizeof(int)]; /* Actually NOT sent over the network */ + union { + uint8_t ack; + uint8_t raw[0]; /* 507 bytes */ + } mes; +}; + +/* + * The data needed by the actual arcnet hardware. + * + * Now, in the real arcnet hardware, the third and fourth bytes are the + * 'offset' specification instead of the length, and the soft data is at + * the _end_ of the 512-byte buffer. We hide this complexity inside the + * driver. + */ +struct arc_hardware +{ + uint8_t source, /* source ARCnet - filled in automagically */ + dest, /* destination ARCnet - 0 for broadcast */ + offset[2]; /* offset bytes (some weird semantics) */ +}; +#define ARC_HDR_SIZE 4 + +/* + * This is an ARCnet frame header, as seen by the kernel (and userspace, + * when you do a raw packet capture). + */ +struct archdr +{ + /* hardware requirements */ + struct arc_hardware hard; + + /* arcnet encapsulation-specific bits */ + union { + struct arc_rfc1201 rfc1201; + struct arc_rfc1051 rfc1051; + struct arc_eth_encap eth_encap; + struct arc_cap cap; + uint8_t raw[0]; /* 508 bytes */ + } soft; +}; + +#endif /* _LINUX_IF_ARCNET_H */ |