📄 main.lst
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252 /*************************************************************************/
253 /*
254 void timer0_interrupt(void) interrupt 1
255 {
256 TL0=TL0+LOW(timer_10ms_value); //reload timer0
257 TH0=TH0+HIGH(timer_10ms_value);
258 if (uart_receiving)
259 {
260 if (uart_char_space<6)
261 uart_char_space++;
262 else
263 {
264 uart_receiving=FALSE;
265 uart_receive_enable=FALSE;
266 uart_received_finished=TRUE;
267 uart_frame_space=0;
268 }
269 uart_frame_space=0;
270 }
271 else
272 {
273 if (!uart_receive_enable)
274 {
275 uart_frame_space++;
276 if (uart_frame_space>8)
277 {
278 uart_frame_space=0;
279 uart_receive_enable=TRUE;
280 }
281 }
282 }
283 if (uart_trans_willing)
284 {
285 uart_trans_willing=FALSE;
286 TI=1;
287 }
288
289 if (being_echo)
290 {
291 net_overtime_count++;
292 if (net_overtime_count>18000)
293 {
294 being_echo=0;
295 if (first_arp)
296 first_arp=0;
297 else
298 remote_echo=1;
299 net_overtime_count=0;
300 }
301 }
302 runtime++;
303 dog++;
C51 COMPILER V7.07 MAIN 06/30/2006 16:21:50 PAGE 6
304 }
305 */
306
307 /*************************************************************************/
308 // 串口中断程序，该程序在认为串口的接收是终端在响应串口的发送
309 // 在串口未发送完成之前，不处理完罗接收的数据
310 /*************************************************************************/
311 /*
312 void uart_interrupt(void) interrupt 4
313 {
314 if (RI)
315 {
316 RI=0;
317 if ((!uart_received_finished)&& uart_receive_enable)
318 {
319 if (!uart_receiving)
320 {
321 uart_receiving=1;
322 uart_receive_count=0;
323 uart_receive_buf[uart_receive_count++]=SBUF;
324 }
325 else
326 {
327 uart_char_space=0;
328 uart_receive_buf[uart_receive_count++]=SBUF;
329 }
330 }
331 }
332 if (TI)
333 {
334 TI=0;
335 if (uart_trans_count<uart_trans_length)
336 {
337 ACC=uart_trans_buf[uart_trans_count++];
338 TB8=P;
339 SBUF=ACC;
340 }
341 else
342 {
343 uart_trans_finished=1;
344 uart_trans_count=0;
345 uart_trans_length=0;
346 }
347
348 }
349 }
350 */
351
352 //*******************************************************************************
353 /* Receive a UDP datagram: return non-0 if client state-change */
354 //*******************************************************************************
355 int udp_receive(ETHERFRAME *efp, int len)
356 {
357 1 UDPKT *udp;
358 1 int ret=0;
359 1 NODE loc, rem;
360 1
361 1 udp = (UDPKT *)efp->edata;
362 1 getudp_srce(efp, &rem); /* Get srce & dest nodes */
363 1 getudp_locdest(efp, &loc);
364 1 if (loc.port == locnode.port) /* Client response */
365 1 {
C51 COMPILER V7.07 MAIN 06/30/2006 16:21:50 PAGE 7
366 2 // UDP 将数据拷贝至串口接收缓冲区，置接收完成标志(在合并方式)
367 2 // UDP 将数据拷贝至串口发送缓冲区，置发送标志(在模块方式)
368 2 // EA=0;
369 2 memcpy(uart_trans_buf+uart_trans_length,udp->udpdata,len);
370 2 uart_trans_length=uart_trans_length+len;
371 2 uart_trans_finished=0;
372 2 if (uart_trans_count==0)
373 2 uart_trans_willing=1;
374 2 // EA=1;
375 2 ret = CLIENT_DONE; /* ..and exit */
376 2 }
377 1 else if (loc.port == ECHOPORT) /* Echo req: resend data */
378 1 udp_transmit(efp, &loc, &rem, udp->udpdata, len);
379 1 return(ret);
380 1 }
381
382 /*****************************************************************/
383 //本机的网络处理子程序
384 /*****************************************************************/
385 int do_net_process(ETHERFRAME *efp,int rxlen)
386 {
387 1 ARPKT *arp;
388 1 IPKT *ip;
389 1 ICMPKT *icmp;
390 1 NODE node;
391 1 int txlen;
392 1 int len;
393 1 int ret=0;
394 1
395 1 ip=(IPKT *)efp->edata;
396 1 if (is_arp(efp,rxlen))
397 1 {
398 2 arp = (ARPKT *)efp->edata;
399 2
400 2 if (arp->op==ARPREQ && arp->dip==locnode.ip)
401 2 { /* ARP request? */
402 3 node.ip = arp->sip; /* Make ARP response */
403 3 memcpy(node.mac, arp->smac, MACLEN);
404 3 txlen = make_arp(efp, &locnode, &node, ARPRESP);
405 3 put_ethernet(efp, txlen); /* Send packet */
406 3 }
407 2 if (arp->op==ARPRESP && arp->dip==locnode.ip)
408 2 { /* ARP response? */
409 3 memcpy(remnode.mac,arp->smac, MACLEN);
410 3 being_echo=0;
411 3 if (first_arp)
412 3 first_arp=0;
413 3 else
414 3 remote_echo=1;
415 3 ret = ARP_RX;
416 3 }
417 2 }
418 1 else if ((rxlen=is_ip(efp, rxlen))!=0) /* IP datagram? */
419 1 if (ip->i.dip==locnode.ip || ip->i.dip==BCASTIP)
420 1
421 1 {
422 2 getip_srce(efp, &node);
423 2 if ((len=is_icmp(ip, rxlen))!=0) /* ICMP? */
424 2 {
425 3 icmp = (ICMPKT *)ip;
426 3 if (icmp->c.type == ICREQ) /* Echo request? */
427 3 {
C51 COMPILER V7.07 MAIN 06/30/2006 16:21:50 PAGE 8
428 4 len = (WORD)max(len, 0); /* Make response */
429 4 txlen = make_icmp(efp, &locnode, &node, ICREP,
430 4 icmp->c.codetype, (WORD)len);
431 4 put_ethernet(efp, txlen); /* Send packet */
432 4 }
433 3 // else if (icmp->c.type == ICUNREACH)
434 3 // printf("\r\nICMP: destination unreachable\r\n");
435 3 }
436 2 else if ((len=is_udp(ip, rxlen))!=0) /* UDP? */
437 2 {
438 3 ret = udp_receive(efp, max(len, 0));
439 3 }
440 2 }
441 1 return (ret);
442 1 }
443
444 //**********************************
445 void flush_gate_mac()
446 {
447 1 int ret;
448 1
449 1 remote_echo=0;
450 1 remnode.mac[0]=0xff;
451 1 remnode.mac[1]=0xff;
452 1 remnode.mac[2]=0xff;
453 1 remnode.mac[3]=0xff;
454 1 remnode.mac[4]=0xff;
455 1 remnode.mac[5]=0xff;
456 1 ret=make_arp(ðerframe,&locnode, &remnode, ARPREQ); //请求网关或控制主机的物理地址
457 1 put_ethernet(ðerframe,ret);
458 1 being_echo=1;
459 1 }
460
461 //************************************************
462 void do_uart_process(void)
463 {
464 1 if (being_echo==0) // 1 arp wait response
465 1 {
466 2 if (remote_echo==0)
467 2 {
468 3 if (!memcmp(remnode.mac, bcast, MACLEN))
469 3 flush_gate_mac();
470 3 else
471 3 send_ip();
472 3 }
473 2 else
474 2 {
475 3 remote_echo=0;
476 3 send_ip();
477 3 }
478 2 }
479 1 }
480
481 //************************************************
482 void send_ip(void)
483 {
484 1 int ret;
485 1
486 1 memcpy((BYTE *)ðerframe+sizeof(ETHERHDR)+sizeof(IPHDR)+sizeof(UDPHDR),uart_receive_buf,uart_receive
-_count);
487 1 remnode.port=locnode.port;
488 1 ret=make_udp(ðerframe, &locnode,&remnode,(WORD)(uart_receive_count));
C51 COMPILER V7.07 MAIN 06/30/2006 16:21:50 PAGE 9
489 1 uart_received_finished=0;
490 1 uart_receive_count=0;
491 1 put_ethernet(ðerframe,ret);
492 1 }
493
494
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 1416 ----
CONSTANT SIZE = 156 ----
XDATA SIZE = 3623 90
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = 8 ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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