131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
//Unfinished appletalk-over-wifi attempt
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/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
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* this notice you can do whatever you want with this stuff. If we meet some day,
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* and you think this stuff is worth it, you can buy me a beer in return.
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* ----------------------------------------------------------------------------
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include "hexdump.h"
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#include "scc.h"
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#include "ddp.h"
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#include "ethertalk.h"
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#include <alloca.h>
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//LLAP type 0x01-0x7F are for data
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#define LLAP_TYPE_ENQ 0x81
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#define LLAP_TYPE_ACK 0x82
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#define LLAP_TYPE_RTS 0x84
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#define LLAP_TYPE_CTS 0x85
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#define LLAP_TYPE_DDP_SHORT 1
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#define LLAP_TYPE_DDP_LONG 2
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typedef struct {
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uint8_t destid; //dest 255 is broadcast
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uint8_t srcid;
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uint8_t type;
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uint8_t data[];
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} llap_packet_t;
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/*
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llap plus short ddp example:
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00000000 ff 48 01 00 06 01 01 05 01 |.H.......|
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dest ff
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src 48
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type 01 (ddp short)
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ddp len 00 06
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dest sock 01
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src sock 01
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ddp type 5
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data 1
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*/
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llap_packet_t *bufferedPacket;
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int bufferedPacketLen;
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void localtalkSend(uint8_t *data, int len) {
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llap_packet_t *p=(llap_packet_t*)data;
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printf("\n\nLOCALTALK PACKET FROM TME MAC\n");
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if (p->type==LLAP_TYPE_ENQ) {
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ethertalk_send_probe(p->destid);
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printf("LocalTalk: enq %hhu->%hhu\n", p->srcid, p->destid);
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} else if (p->type==LLAP_TYPE_RTS) {
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printf("LocalTalk: RTS %hhu->%hhu\n", p->srcid, p->destid);
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if (p->destid!=0xff) {
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printf("Sending CTS.\n");
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uint8_t resp[3];
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llap_packet_t *r=(llap_packet_t*)resp;
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r->destid=p->srcid;
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r->srcid=p->destid;
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r->type=LLAP_TYPE_CTS;
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sccRecv(1, r, sizeof(llap_packet_t), 3);
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}
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} else if (p->type==LLAP_TYPE_CTS) {
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printf("LocalTalk: CTS %hhu->%hhu\n", p->srcid, p->destid);
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if (bufferedPacketLen>0 && p->destid==bufferedPacket->srcid) {
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sccRecv(1, bufferedPacket, bufferedPacketLen, 3);
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}
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bufferedPacketLen=0;
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} else if (p->type==LLAP_TYPE_DDP_SHORT) {
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printf("Localtalk: DDP short %hhu->%hhu\n", p->srcid, p->destid);
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ddp_print(p->data, len-sizeof(llap_packet_t), 0);
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ethertalk_send_short_ddp(p->data, len-sizeof(llap_packet_t), p->srcid, p->destid);
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// hexdump(data, len);
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} else if (p->type==LLAP_TYPE_DDP_LONG) {
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printf("Localtalk: DDP long\n");
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ddp_print(p->data, len-sizeof(llap_packet_t), 1);
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ethertalk_send_long_ddp(p->data, len-sizeof(llap_packet_t));
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// hexdump(data, len);
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} else {
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printf("LocalTalk... errm... dunno what to do with this (cmd=%x).\n", data[2]);
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}
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}
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void localtalk_send_ddp(uint8_t *data, int len) {
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llap_packet_t rts;
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rts.destid=ddp_get_dest_node(data);
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rts.srcid=ddp_get_src_node(data);
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rts.type=LLAP_TYPE_RTS;
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sccRecv(1, &rts, 3, 60);
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//We assume this is a long ddp packet.
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#if 1
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llap_packet_t *p=bufferedPacket;
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p->destid=ddp_get_dest_node(data);
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p->srcid=ddp_get_src_node(data);
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p->type=LLAP_TYPE_DDP_SHORT;
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bufferedPacketLen=ddp_long_to_short(data, p->data, len);
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sccRecv(1, bufferedPacket, bufferedPacketLen, 10);
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#else
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printf("Localtalk: Sending ddp of len %d for a total of %d\n", len, len+sizeof(llap_packet_t));
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llap_packet_t *p=bufferedPacket;
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p->destid=ddp_get_dest_node(data);
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p->srcid=ddp_get_src_node(data);
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p->type=LLAP_TYPE_DDP_LONG;
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memcpy(p->data, data, len);
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bufferedPacketLen=len+sizeof(llap_packet_t);
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sccRecv(1, bufferedPacket, bufferedPacketLen, 10);
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#endif
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}
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void localtalk_send_llap_resp(uint8_t node) {
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//ToDo
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}
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//Called once every now and then.
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void localtalkTick() {
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ethertalkTick();
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}
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void localtalkInit() {
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ethertalkInit();
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bufferedPacketLen=0;
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bufferedPacket=malloc(8192);
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}
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