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ripdump.c
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Upload User: hepax88
Upload Date: 2007-01-03
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Code Size: 1k
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TCP/IP Stack

Development Platform:

Visual C++

ripdump.c：Code Content
  1. /* RIP packet tracing
  2.  * Copyright 1991 Phil Karn, KA9Q
  3.  */
  4. #include "global.h"
  5. #include "mbuf.h"
  6. #include "netuser.h"
  7. #include "timer.h"
  8. #include "rip.h"
  9. #include "trace.h"
  11. void
  12. rip_dump(fp,bpp)
  13. FILE *fp;
  14. struct mbuf **bpp;
  15. {
  16. struct rip_route entry;
  17. int i;
  18. int cmd,version;
  19. uint16 len;
  21. fprintf(fp,"RIP: ");
  22. cmd = PULLCHAR(bpp);
  23. version = PULLCHAR(bpp);
  24. switch(cmd){
  25. case RIPCMD_REQUEST:
  26. fprintf(fp,"REQUEST");
  27. break;
  28. case RIPCMD_RESPONSE:
  29. fprintf(fp,"RESPONSE");
  30. break;
  31. default:
  32. fprintf(fp," cmd %u",cmd);
  33. break;
  34. }
  36. pull16(bpp); /* remove one word of padding */
  38. len = len_p(*bpp);
  39. fprintf(fp," vers %u entries %u:n",version,len / RIPROUTE);
  41. i = 0;
  42. while(len >= RIPROUTE){
  43. /* Pull an entry off the packet */
  44. pullentry(&entry,bpp);
  45. len -= RIPROUTE;
  47. if(entry.addr_fam != RIP_IPFAM) {
  48. /* Skip non-IP addresses */
  49. continue;
  50. }
  51. fprintf(fp,"%-16s%-3u ",inet_ntoa(entry.target),entry.metric);
  52. if((++i % 3) == 0){
  53. putc('n',fp);
  54. }
  55. }
  56. if((i % 3) != 0)
  57. putc('n',fp);
  58. }