4.4BSD/usr/src/contrib/bind-4.9/named/db_glue.c
#if !defined(lint) && !defined(SABER)
static char sccsid[] = "@(#)db_glue.c 4.4 (Berkeley) 6/1/90";
static char rcsid[] = "$Id: db_glue.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $";
#endif /* not lint */
/*
* ++Copyright++ 1986, 1988
* -
* Copyright (c) 1986, 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* -
* --Copyright--
*/
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <stdio.h>
#include <syslog.h>
#include <ctype.h>
#include <netdb.h>
#include <errno.h>
#include "../conf/portability.h"
#include "../conf/options.h"
#include "ns.h"
#include "db.h"
struct valuelist {
struct valuelist *next, *prev;
char *name;
char *proto;
short port;
} *servicelist, *protolist;
void
buildservicelist()
{
struct servent *sp;
struct valuelist *slp;
setservent(1);
while (sp = getservent()) {
slp = (struct valuelist *)malloc(sizeof(struct valuelist));
slp->name = savestr(sp->s_name);
slp->proto = savestr(sp->s_proto);
slp->port = ntohs((u_short)sp->s_port);
slp->next = servicelist;
slp->prev = NULL;
if (servicelist)
servicelist->prev = slp;
servicelist = slp;
}
endservent();
}
void
buildprotolist()
{
struct protoent *pp;
struct valuelist *slp;
setprotoent(1);
while (pp = getprotoent()) {
slp = (struct valuelist *)malloc(sizeof(struct valuelist));
slp->name = savestr(pp->p_name);
slp->port = pp->p_proto;
slp->next = protolist;
slp->prev = NULL;
if (protolist)
protolist->prev = slp;
protolist = slp;
}
endprotoent();
}
/*
* Convert service name or (ascii) number to int.
*/
int
servicenumber(p)
char *p;
{
return (findservice(p, &servicelist));
}
/*
* Convert protocol name or (ascii) number to int.
*/
int
protocolnumber(p)
char *p;
{
return (findservice(p, &protolist));
}
int
findservice(s, list)
register char *s;
register struct valuelist **list;
{
register struct valuelist *lp = *list;
int n;
for (; lp != NULL; lp = lp->next)
if (strcasecmp(lp->name, s) == 0) {
if (lp != *list) {
lp->prev->next = lp->next;
if (lp->next)
lp->next->prev = lp->prev;
(*list)->prev = lp;
lp->next = *list;
*list = lp;
}
return(lp->port);
}
if (sscanf(s, "%d", &n) != 1 || n <= 0)
n = -1;
return(n);
}
struct servent *
cgetservbyport(port, proto)
u_short port;
char *proto;
{
register struct valuelist **list = &servicelist;
register struct valuelist *lp = *list;
static struct servent serv;
port = htons(port);
for (; lp != NULL; lp = lp->next) {
if (port != (u_short)lp->port)
continue;
if (strcasecmp(lp->proto, proto) == 0) {
if (lp != *list) {
lp->prev->next = lp->next;
if (lp->next)
lp->next->prev = lp->prev;
(*list)->prev = lp;
lp->next = *list;
*list = lp;
}
serv.s_name = lp->name;
serv.s_port = htons((u_short)lp->port);
serv.s_proto = lp->proto;
return(&serv);
}
}
return(0);
}
struct protoent *
cgetprotobynumber(proto)
register int proto;
{
register struct valuelist **list = &protolist;
register struct valuelist *lp = *list;
static struct protoent prot;
for (; lp != NULL; lp = lp->next)
if (lp->port == proto) {
if (lp != *list) {
lp->prev->next = lp->next;
if (lp->next)
lp->next->prev = lp->prev;
(*list)->prev = lp;
lp->next = *list;
*list = lp;
}
prot.p_name = lp->name;
prot.p_proto = lp->port;
return(&prot);
}
return(0);
}
char *
protocolname(num)
int num;
{
static char number[8];
struct protoent *pp;
pp = cgetprotobynumber(num);
if(pp == 0) {
(void) sprintf(number, "%d", num);
return(number);
}
return(pp->p_name);
}
char *
servicename(port, proto)
u_short port;
char *proto;
{
static char number[8];
struct servent *ss;
ss = cgetservbyport(htons(port), proto);
if(ss == 0) {
(void) sprintf(number, "%d", port);
return(number);
}
return(ss->s_name);
}
void
gettime(ttp)
struct timeval *ttp;
{
if (gettimeofday(ttp, (struct timezone *)0) < 0)
syslog(LOG_ERR, "gettimeofday failed: %m");
return;
}
#if !defined(BSD)
int
getdtablesize()
{
#if defined(_POSIX_SOURCE)
int j;
if ((j = (int) sysconf(_SC_OPEN_MAX)) < 0)
return(FD_SETSIZE);
return(j);
#else
return(FD_SETSIZE);
#endif /* POSIX */
}
#endif /* BSD */
int
my_close(fd)
int fd;
{
int s = close(fd);
if (s < 0) {
syslog(LOG_ERR, "close(%d) failed: %m", fd);
#ifdef DEBUG
if (debug >= 3)
fprintf(ddt, "close(%d) failed: %s\n",
fd, strerror(errno));
#endif
} else {
#ifdef DEBUG
if (debug >= 3)
fprintf(ddt, "close(%d) succeeded\n", fd);
#endif
}
return s;
}
int
my_fclose(fp)
FILE *fp;
{
int fd = fileno(fp),
s = fclose(fp);
if (s < 0) {
syslog(LOG_ERR, "fclose(%d) failed: %m", fd);
#ifdef DEBUG
if (debug >= 3)
fprintf(ddt, "fclose(%d) failed: %s\n",
fd, strerror(errno));
#endif
} else {
#ifdef DEBUG
if (debug >= 3)
fprintf(ddt, "fclose(%d) succeeded\n", fd);
#endif
}
return s;
}
/*
* Make a copy of a string and return a pointer to it.
*/
char *
savestr(str)
char *str;
{
char *cp;
cp = malloc(strlen(str) + 1);
if (cp == NULL) {
syslog(LOG_ERR, "savestr: %m");
exit(1);
}
(void) strcpy(cp, str);
return (cp);
}
int
writemsg(rfd, msg, msglen)
int rfd;
u_char *msg;
int msglen;
{
struct iovec iov[2];
u_short len = htons((u_short)msglen);
iov[0].iov_base = (caddr_t)&len;
iov[0].iov_len = sizeof(len);
iov[1].iov_base = (caddr_t)msg;
iov[1].iov_len = msglen;
if (writev(rfd, iov, 2) != sizeof(len) + msglen) {
#ifdef DEBUG
if (debug)
fprintf(ddt,"write failed %d\n", errno);
#endif
return (-1);
}
return (0);
}