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icsetbuf.c,v
Package: icmp.rar　[view]
Upload User: lywr2008
Upload Date: 2022-05-26
Package Size: 9k
Code Size: 2k
Category:

Linux Network

Development Platform:

Unix_Linux

icsetbuf.c,v：Code Content
  1. head 1.1;
  2. access;
  3. symbols;
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  5. dls:1.1; strict;
  6. comment @ * @;
  9. 1.1
  10. date 97.09.21.19.26.41; author dls; state Dist;
  11. branches;
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  15. desc
  16. @@
  19. 1.1
  20. log
  21. @pre-3e code
  22. @
  23. text
  24. @/* icsetbuf.c - icsetbuf */
  26. #include <conf.h>
  27. #include <kernel.h>
  28. #include <network.h>
  30. /*------------------------------------------------------------------------
  31.  *  icsetbuf -  set up a buffer for an ICMP message
  32.  *------------------------------------------------------------------------
  33.  */
  34. struct ep *icsetbuf(type, pa1, pisresp, piserr)
  35. int type;
  36. char *pa1; /* old packet, if any */
  37. Bool *pisresp, /* packet is a response */
  38. *piserr; /* packet is an error */
  39. {
  40. struct ep *pep;
  42. *pisresp = *piserr = FALSE;
  44. switch (type) {
  45. case ICT_REDIRECT:
  46. pep = (struct ep *)getbuf(Net.netpool);
  47. if ((int)pep == SYSERR)
  48. return 0;
  49. blkcopy(pep, pa1, MAXNETBUF);
  50. pa1 = (char *)pep;
  51. *piserr = TRUE;
  52. break;
  53. case ICT_DESTUR:
  54. case ICT_SRCQ:
  55. case ICT_TIMEX:
  56. case ICT_PARAMP:
  57. pep = (struct ep *)pa1;
  58. *piserr = TRUE;
  59. break;
  60. case ICT_ECHORP:
  61. case ICT_INFORP:
  62. case ICT_MASKRP:
  63. pep = (struct ep *)pa1;
  64. *pisresp = TRUE;
  65. break;
  66. case ICT_ECHORQ:
  67. case ICT_TIMERQ:
  68. case ICT_INFORQ:
  69. case ICT_MASKRQ:
  70. pep = (struct ep *)getbuf(Net.lrgpool);
  71. if ((int)pep == SYSERR)
  72. return 0;
  73. break;
  74. case ICT_TIMERP: /* Not Implemented */
  75. /* IcmpOutTimestampsReps++; */
  76. IcmpOutErrors--; /* Kludge: we increment above */
  77. freebuf(pa1);
  78. return 0;
  79. default:
  80. kprintf("icsetbuf: unknown ICMP type (%d)n", type);
  81. return 0;
  82. }
  83. if (*piserr)
  84. *pisresp = TRUE;
  85. switch (type) { /* Update MIB Statistics */
  86. case ICT_ECHORP: IcmpOutEchos++; break;
  87. case ICT_ECHORQ: IcmpOutEchoReps++; break;
  88. case ICT_DESTUR: IcmpOutDestUnreachs++; break;
  89. case ICT_SRCQ: IcmpOutSrcQuenchs++; break;
  90. case ICT_REDIRECT: IcmpOutRedirects++; break;
  91. case ICT_TIMEX: IcmpOutTimeExcds++; break;
  92. case ICT_PARAMP: IcmpOutParmProbs++; break;
  93. case ICT_TIMERQ: IcmpOutTimestamps++; break;
  94. case ICT_TIMERP: IcmpOutTimestampReps++; break;
  95. case ICT_MASKRQ: IcmpOutAddrMasks++; break;
  96. case ICT_MASKRP: IcmpOutAddrMaskReps++; break;
  97. }
  98. return pep;
  99. }
  100. @