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117 lines
3.5 KiB
Plaintext
117 lines
3.5 KiB
Plaintext
/*
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GSport - an Apple //gs Emulator
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Copyright (C) 2013-2014 by Peter Neubauer
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Ethernet addresses are 6 bytes */
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#define ETHER_ADDR_LEN 6
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static const word16 ETHER_MAX_SIZE = 0x5DC;
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static const word16 ETHER_MIN_SIZE = 60;
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static const byte SNAP_DSAP = 0xAA;
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static const byte SNAP_SSAP = 0xAA;
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static const byte SNAP_CONTROL = 0x03;
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#define OUI_APPLETALK_1 0x08
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#define OUI_APPLETALK_2 0x00
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#define OUI_APPLETALK_3 0x07
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#define TYPE_APPLETALK_1 0x80
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#define TYPE_APPLETALK_2 0x9B
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#define OUI_AARP_1 0x00
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#define OUI_AARP_2 0x00
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#define OUI_AARP_3 0x00
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#define TYPE_AARP_1 0x80
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#define TYPE_AARP_2 0xF3
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static const byte AARP_HARDWARE_ETHER = 0x01;
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static const word16 AARP_PROTOCOL_TYPE = 0x809B;
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static const byte AARP_HW_ADDR_LEN = 6;
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static const byte AARP_PROTOCOL_ADDR_LEN = 4;
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enum AARP_FUNCTION
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{
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AARP_FUNCTION_REQUEST = 0x01,
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AARP_FUNCTION_RESPONSE = 0x02,
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AARP_FUNCTION_PROBE = 0x03
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};
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// reference C-4
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static const long AARP_PROBE_INTERVAL = 200; /* milliseconds */
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static const unsigned int AARP_PROBE_COUNT = 10;
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// reference 2-9 and 3-9, optional and at developer discretion
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static const long AARP_REQUEST_INTERVAL = 200; /* milliseconds */
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static const unsigned int AARP_REQUEST_COUNT = 10;
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#pragma pack(push, 1)
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struct ether_addr_t
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{
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byte mac[ETHER_ADDR_LEN];
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};
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/* Ethernet 802.2/802.3/SNAP header */
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struct ethernet_header_t
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{
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// 802.3 header
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struct ether_addr_t dest;
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struct ether_addr_t source;
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word16 length;
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};
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struct snap_discriminator_t
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{
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byte oui[3];
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byte type[2];
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};
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struct snap_header_t
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{
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// 802.2 header
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byte dsap;
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byte ssap;
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byte control;
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// SNAP header
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struct snap_discriminator_t discriminator;
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};
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struct protocol_addr_t
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{
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byte zero; // Reference C-4 and 3-11: The protocol address is four bytes with the high byte zero.
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struct at_addr_t addr;
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};
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struct aarp_header_t
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{
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word16 hardware_type;
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word16 protocol_type;
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byte hw_addr_len;
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byte protocol_addr_len;
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word16 function;
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struct ether_addr_t source_hw_addr;
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struct protocol_addr_t source_proto_addr;
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struct ether_addr_t dest_hw_addr;
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struct protocol_addr_t dest_proto_addr;
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};
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#pragma pack(pop)
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static const struct ether_addr_t HW_APPLETALK_BROADCAST = {{ 0x09, 0x00, 0x07, 0xff, 0xff, 0xff }};
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static const struct ether_addr_t HW_LOCAL_DEFAULT = {{0x02 /* unicast, locally administered */, 'A', '2', 'G', 'S', 0x00}};
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//static const struct ether_addr_t HW_LOCAL = {{ 0x02 /* unicast, locally administered */, 0x00, 0x4c, 0x4f, 0x4f, 0x50 }};
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static const struct ether_addr_t HW_ZERO = { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
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static const struct snap_discriminator_t SNAP_APPLETALK = {{ OUI_APPLETALK_1, OUI_APPLETALK_2, OUI_APPLETALK_3}, {TYPE_APPLETALK_1, TYPE_APPLETALK_2 }};
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static const struct snap_discriminator_t SNAP_AARP = {{ OUI_AARP_1, OUI_AARP_2, OUI_AARP_3}, {TYPE_AARP_1, TYPE_AARP_2 }}; |