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
ZSendPacket(packet,len,waitforack)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, ¬ice)) != ZERR_NONE)
49 return (retval);
50
51 retval = Z_WaitForNotice (&acknotice, wait_for_hmack, ¬ice.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
wait_for_hmack(ZNotice_t * notice,void * uid)60 static int wait_for_hmack(ZNotice_t *notice, void *uid)
61 {
62 return (notice->z_kind == HMACK && ZCompareUID(¬ice->z_uid, (ZUnique_Id_t *)uid));
63 }
64