src/protocols/zephyr/ZRecvPkt.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for ZReceivePacket function.
   3  *
   4  *      Created by:     Robert French
   5  *
   6  *      $Source$
   7  *      $Author: warmenhoven $
   8  *
   9  *      Copyright (c) 1987,1988 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_ZReceivePacket_c[] = "$Header$";
  17 #endif
  18
  19 #include <internal.h>
  20
  21 Code_t ZReceivePacket(buffer, ret_len, from)
  22     ZPacket_t 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     if (*ret_len > Z_MAXPKTLEN)
  36         return (ZERR_PKTLEN);
  37
  38     (void) memcpy(buffer, nextq->packet, *ret_len);
  39
  40     if (from)
  41         *from = nextq->from;
  42
  43     Z_RemQueue(nextq);
  44
  45     return (ZERR_NONE);
  46 }