libpurple/protocols/zephyr/ZSendPkt.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for the ZSendPacket function.
   3  *
   4  *      Created by:     Robert French
   5  *
   6  *      Copyright (c) 1987,1991 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 #ifdef WIN32
  13 #include <winsock.h>
  14 #else
  15 #include <sys/socket.h>
  16 #endif
  17
  18 static int wait_for_hmack(ZNotice_t *notice, void *uid);
  19
  20 Code_t ZSendPacket(packet, len, waitforack)
  21     char *packet;
  22     int len;
  23     int waitforack;
  24 {
  25     Code_t retval;
  26     struct sockaddr_in dest;
  27     ZNotice_t notice, acknotice;
  28
  29     if (!packet || len < 0)
  30         return (ZERR_ILLVAL);
  31
  32     if (len > Z_MAXPKTLEN)
  33         return (ZERR_PKTLEN);
  34
  35     if (ZGetFD() < 0)
  36         if ((retval = ZOpenPort((unsigned short *)0)) != ZERR_NONE)
  37             return (retval);
  38
  39     dest = ZGetDestAddr();
  40
  41     if (sendto(ZGetFD(), packet, len, 0, (struct sockaddr *)&dest,
  42                sizeof(dest)) < 0)
  43         return (errno);
  44
  45     if (!waitforack)
  46         return (ZERR_NONE);
  47
  48     if ((retval = ZParseNotice(packet, len, &notice)) != ZERR_NONE)
  49         return (retval);
  50
  51     retval = Z_WaitForNotice (&acknotice, wait_for_hmack, &notice.z_uid,
  52                               HM_TIMEOUT);
  53     if (retval == ETIMEDOUT)
  54       return ZERR_HMDEAD;
  55     if (retval == ZERR_NONE)
  56       ZFreeNotice (&acknotice);
  57     return retval;
  58 }
  59
  60 static int wait_for_hmack(ZNotice_t *notice, void *uid)
  61 {
  62     return (notice->z_kind == HMACK && ZCompareUID(&notice->z_uid, (ZUnique_Id_t *)uid));
  63 }