1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZSendPacket function.
*
* Created by: Robert French
*
* Copyright (c) 1987,1991 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include "internal.h"
#ifdef WIN32
#include <winsock.h>
#else
#include <sys/socket.h>
#endif
static int wait_for_hmack(ZNotice_t *notice, void *uid);
Code_t ZSendPacket(packet, len, waitforack)
char *packet;
int len;
int waitforack;
{
Code_t retval;
struct sockaddr_in dest;
ZNotice_t notice, acknotice;
if (!packet || len < 0)
return (ZERR_ILLVAL);
if (len > Z_MAXPKTLEN)
return (ZERR_PKTLEN);
if (ZGetFD() < 0)
if ((retval = ZOpenPort((unsigned short *)0)) != ZERR_NONE)
return (retval);
dest = ZGetDestAddr();
if (sendto(ZGetFD(), packet, len, 0, (struct sockaddr *)&dest,
sizeof(dest)) < 0)
return (errno);
if (!waitforack)
return (ZERR_NONE);
if ((retval = ZParseNotice(packet, len, ¬ice)) != ZERR_NONE)
return (retval);
retval = Z_WaitForNotice (&acknotice, wait_for_hmack, ¬ice.z_uid,
HM_TIMEOUT);
if (retval == ETIMEDOUT)
return ZERR_HMDEAD;
if (retval == ZERR_NONE)
ZFreeNotice (&acknotice);
return retval;
}
static int wait_for_hmack(ZNotice_t *notice, void *uid)
{
return (notice->z_kind == HMACK && ZCompareUID(¬ice->z_uid, (ZUnique_Id_t *)uid));
}
|
