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/* This file is part of the Project Athena Zephyr Notification System.
* It contains functions for general use within the Zephyr server.
*
* Created by: John T. Kohl
*
* $Id: 1666ec4b1e60e1604b679759e91000e77de914dc $
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <zephyr/mit-copyright.h>
#include "zserver.h"
#ifndef lint
#ifndef SABER
static const char rcsid_common_c[] =
"$Id: 1666ec4b1e60e1604b679759e91000e77de914dc $";
#endif /* SABER */
#endif /* lint */
/* common routines for the server */
/* copy a string into a newly allocated area */
char *
strsave (const char *sp)
{
char *ret;
ret = strdup(sp);
if (!ret) {
syslog(LOG_CRIT, "no mem strdup'ing");
abort();
}
return ret;
}
/* The "& 0x5f" provides case-insensitivity for ASCII. */
unsigned long
hash(const char *string)
{
unsigned long hval = 0;
char cp;
while (1) {
cp = *string++;
if (!cp)
break;
hval += cp & 0x5f;
cp = *string++;
if (!cp)
break;
hval += (cp & 0x5f) * (3 + (1 << 16));
cp = *string++;
if (!cp)
break;
hval += (cp & 0x5f) * (1 + (1 << 8));
cp = *string++;
if (!cp)
break;
hval += (cp & 0x5f) * (1 + (1 << 12));
cp = *string++;
if (!cp)
break;
hval += (cp & 0x5f) * (1 + (1 << 4));
hval += ((long) hval) >> 18;
}
hval &= 0x7fffffff;
return hval;
}
/* Output a name, replacing newlines with \n and single quotes with \q. */
void
dump_quote(char *p, FILE *fp)
{
for (; *p; p++) {
if (*p == '\'') {
putc('\\', fp);
putc('q', fp);
} else if (*p == '\n') {
putc('\\', fp);
putc('n', fp);
} else {
putc(*p, fp);
}
}
}
/* Pull the address out of the packet for dispatching. Doesn't do anything
* special, and will need to change signatures when ipv6 support happens. But
* it'll be in one place....
*/
void
notice_extract_address(ZNotice_t *notice, struct sockaddr_in *addr)
{
/*
* We get the address out of the uid rather than the
* Hopefully by the time a server will actually be speaking ipv6, it won't have
* to worry about talking to other <3.0 realms
*/
memset(addr, 0, sizeof(*addr));
addr->sin_addr.s_addr = notice->z_uid.zuid_addr.s_addr;
addr->sin_port = notice->z_port;
addr->sin_family = AF_INET;
}
int
packets_waiting(void)
{
fd_set readable, initial;
struct timeval tv;
if (msgs_queued())
return 1;
FD_ZERO(&initial);
FD_SET(srv_socket, &initial);
readable = initial;
tv.tv_sec = tv.tv_usec = 0;
return (select(srv_socket + 1, &readable, NULL, NULL, &tv) > 0);
}
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