src/protocols/zephyr/ZPeekPkt.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for ZPeekPacket function.
   3  *
   4  *      Created by:     Robert French
   5  *
   6  *      $Source$
   7  *      $Author: warmenhoven $
   8  *
   9  *      Copyright (c) 1987 by the Massachusetts Institute of Technology.
  10  *      For copying and distribution information, see the file
  11  *      "mit-copyright.h".
  12  */
  13 /* $Header$ */
  14
  15 #ifndef lint
  16 static char rcsid_ZPeekPacket_c[] = "$Header$";
  17 #endif
  18
  19 #include <internal.h>
  20
  21 Code_t ZPeekPacket(buffer, ret_len, from)
  22     char **buffer;
  23     int *ret_len;
  24     struct sockaddr_in *from;
  25 {
  26     Code_t retval;
  27     struct _Z_InputQ *nextq;
  28
  29     if ((retval = Z_WaitForComplete()) != ZERR_NONE)
  30         return (retval);
  31
  32     nextq =Z_GetFirstComplete();
  33
  34     *ret_len = nextq->packet_len;
  35
  36     if (!(*buffer = (char *) malloc((unsigned) *ret_len)))
  37         return (ENOMEM);
  38
  39     (void) memcpy(*buffer, nextq->packet, *ret_len);
  40
  41     if (from)
  42         *from = nextq->from;
  43
  44     return (ZERR_NONE);
  45 }