libpurple/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  *      Copyright (c) 1987,1988 by the Massachusetts Institute of Technology.
   7  *      For copying and distribution information, see the file
   8  *      "mit-copyright.h".
   9  */
  10
  11 #include "internal.h"
  12
  13 Code_t ZReceivePacket(buffer, ret_len, from)
  14     ZPacket_t buffer;
  15     int *ret_len;
  16     struct sockaddr_in *from;
  17 {
  18     Code_t retval;
  19     struct _Z_InputQ *nextq;
  20
  21     if ((retval = Z_WaitForComplete()) != ZERR_NONE)
  22         return (retval);
  23
  24     nextq = Z_GetFirstComplete();
  25
  26     *ret_len = nextq->packet_len;
  27     if (*ret_len > Z_MAXPKTLEN)
  28         return (ZERR_PKTLEN);
  29
  30     (void) memcpy(buffer, nextq->packet, *ret_len);
  31
  32     if (from)
  33         *from = nextq->from;
  34
  35     Z_RemQueue(nextq);
  36
  37     return (ZERR_NONE);
  38 }