1998-05-03 04:11:49 +00:00
|
|
|
#if !defined(lint) && !defined(SABER)
|
2000-10-31 12:35:45 +00:00
|
|
|
static const char rcsid[] = "$Id: ns_glue.c,v 8.17 2000/07/17 07:36:52 vixie Exp $";
|
1998-05-03 04:11:49 +00:00
|
|
|
#endif /* not lint */
|
|
|
|
|
|
|
|
/*
|
2000-05-26 07:17:19 +00:00
|
|
|
* Copyright (c) 1996-2000 by Internet Software Consortium, Inc.
|
1998-05-03 04:11:49 +00:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
|
|
|
|
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
|
|
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
|
|
|
|
* CONSORTIUM 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "port_before.h"
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <sys/uio.h>
|
1999-11-30 02:43:11 +00:00
|
|
|
#include <sys/un.h>
|
1998-05-03 04:11:49 +00:00
|
|
|
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <arpa/nameser.h>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
|
|
|
|
#include <errno.h>
|
|
|
|
#include <resolv.h>
|
|
|
|
#include <signal.h>
|
|
|
|
#include <stdarg.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <syslog.h>
|
|
|
|
#include <time.h>
|
|
|
|
#include <stdarg.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
#include <isc/eventlib.h>
|
|
|
|
#include <isc/logging.h>
|
|
|
|
#include <isc/memcluster.h>
|
|
|
|
|
|
|
|
#include "port_after.h"
|
|
|
|
|
|
|
|
#include "named.h"
|
|
|
|
|
|
|
|
/*
|
|
|
|
* IP address from unaligned octets.
|
|
|
|
*/
|
|
|
|
struct in_addr
|
|
|
|
ina_get(const u_char *data) {
|
|
|
|
struct in_addr ret;
|
|
|
|
u_int32_t i;
|
|
|
|
|
|
|
|
GETLONG(i, data);
|
|
|
|
ina_ulong(ret) = htonl(i);
|
|
|
|
return (ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* IP address to unaligned octets.
|
|
|
|
*/
|
|
|
|
u_char *
|
|
|
|
ina_put(struct in_addr ina, u_char *data) {
|
|
|
|
PUTLONG(ntohl(ina_ulong(ina)), data);
|
|
|
|
return (data);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2000-05-26 07:17:19 +00:00
|
|
|
* IP address to presentation format.
|
1998-05-03 04:11:49 +00:00
|
|
|
*/
|
|
|
|
const char *
|
|
|
|
sin_ntoa(struct sockaddr_in sin) {
|
|
|
|
static char ret[sizeof "[111.222.333.444].55555"];
|
|
|
|
|
2000-05-26 07:17:19 +00:00
|
|
|
sprintf(ret, "[%s].%u", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
|
1998-05-03 04:11:49 +00:00
|
|
|
return (ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Logging Support
|
|
|
|
*/
|
|
|
|
|
1999-11-30 02:43:11 +00:00
|
|
|
int
|
|
|
|
ns_wouldlog(int category, int level) {
|
|
|
|
if (log_ctx_valid)
|
|
|
|
return (log_check(log_ctx, category, level));
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
1998-05-03 04:11:49 +00:00
|
|
|
void
|
|
|
|
ns_debug(int category, int level, const char *format, ...) {
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
if (!log_ctx_valid)
|
|
|
|
return;
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, category, log_debug(level), format, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_info(int category, const char *format, ...) {
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
if (!log_ctx_valid)
|
|
|
|
return;
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, category, log_info, format, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_notice(int category, const char *format, ...) {
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
if (!log_ctx_valid)
|
|
|
|
return;
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, category, log_notice, format, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_warning(int category, const char *format, ...) {
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
if (!log_ctx_valid)
|
|
|
|
return;
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, category, log_warning, format, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_error(int category, const char *format, ...) {
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
if (!log_ctx_valid)
|
|
|
|
return;
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, category, log_error, format, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_panic(int category, int dump_core, const char *format, ...) {
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
if (!log_ctx_valid)
|
|
|
|
return;
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, category, log_critical, format, args);
|
|
|
|
va_end(args);
|
|
|
|
va_start(args, format);
|
|
|
|
log_vwrite(log_ctx, ns_log_panic, log_critical, format, args);
|
|
|
|
va_end(args);
|
|
|
|
if (dump_core)
|
|
|
|
abort();
|
|
|
|
else
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_assertion_failed(char *file, int line, assertion_type type, char *cond,
|
|
|
|
int print_errno)
|
|
|
|
{
|
|
|
|
ns_panic(ns_log_insist, 1, "%s:%d: %s(%s)%s%s failed.",
|
|
|
|
file, line, assertion_type_to_text(type), cond,
|
|
|
|
(print_errno) ? ": " : "",
|
|
|
|
(print_errno) ? strerror(errno) : "");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2000-05-26 07:17:19 +00:00
|
|
|
* XXX This is for compatibility and should eventually be removed.
|
1998-05-03 04:11:49 +00:00
|
|
|
*/
|
|
|
|
void
|
|
|
|
panic(const char *msg, const void *arg) {
|
|
|
|
ns_panic(ns_log_default, 1, msg, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* How many labels in this name?
|
|
|
|
* Note: the root label is not included in the count.
|
|
|
|
*/
|
|
|
|
int
|
2000-05-26 07:17:19 +00:00
|
|
|
nlabels(const char *dname) {
|
1998-05-03 04:11:49 +00:00
|
|
|
int count, i, found, escaped;
|
|
|
|
const char *tmpdname, *end_tmpdname;
|
|
|
|
int tmpdnamelen, c;
|
|
|
|
|
|
|
|
INSIST(dname != NULL);
|
|
|
|
|
|
|
|
count = 0;
|
|
|
|
tmpdname = dname;
|
|
|
|
tmpdnamelen = strlen(tmpdname);
|
|
|
|
/*
|
|
|
|
* Ignore a trailing label separator (i.e. an unescaped dot)
|
|
|
|
* in 'tmpdname'.
|
|
|
|
*/
|
|
|
|
if (tmpdnamelen && tmpdname[tmpdnamelen-1] == '.') {
|
|
|
|
escaped = 0;
|
|
|
|
/* note this loop doesn't get executed if tmpdnamelen==1 */
|
|
|
|
for (i = tmpdnamelen - 2; i >= 0; i--)
|
|
|
|
if (tmpdname[i] == '\\') {
|
|
|
|
if (escaped)
|
|
|
|
escaped = 0;
|
|
|
|
else
|
|
|
|
escaped = 1;
|
2000-05-26 07:17:19 +00:00
|
|
|
} else
|
1998-05-03 04:11:49 +00:00
|
|
|
break;
|
|
|
|
if (!escaped)
|
|
|
|
tmpdnamelen--;
|
|
|
|
}
|
|
|
|
|
|
|
|
end_tmpdname = tmpdname + tmpdnamelen;
|
|
|
|
|
|
|
|
while(tmpdname != end_tmpdname) {
|
|
|
|
count++;
|
|
|
|
/*
|
|
|
|
* Strip off the first label if we're not already at
|
|
|
|
* the root label.
|
|
|
|
*/
|
|
|
|
for (escaped = found = 0;
|
|
|
|
(tmpdname != end_tmpdname) && !found;
|
|
|
|
tmpdname++) {
|
|
|
|
c = *tmpdname;
|
|
|
|
if (!escaped && (c == '.'))
|
|
|
|
found = 1;
|
|
|
|
|
|
|
|
if (escaped)
|
|
|
|
escaped = 0;
|
|
|
|
else if (c == '\\')
|
|
|
|
escaped = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2000-05-26 07:17:19 +00:00
|
|
|
ns_debug(ns_log_default, 12, "nlabels of \"%s\" -> %d", dname, count);
|
1998-05-03 04:11:49 +00:00
|
|
|
return (count);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get current system time and put it in a global.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
gettime(struct timeval *ttp) {
|
|
|
|
if (gettimeofday(ttp, NULL) < 0)
|
|
|
|
ns_error(ns_log_default, "gettimeofday: %s", strerror(errno));
|
2000-10-31 12:35:45 +00:00
|
|
|
INSIST(ttp->tv_usec >= 0 && ttp->tv_usec < 1000000);
|
1998-05-03 04:11:49 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is useful for tracking down lost file descriptors.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
my_close(int fd) {
|
|
|
|
int s;
|
|
|
|
|
|
|
|
do {
|
|
|
|
errno = 0;
|
|
|
|
s = close(fd);
|
|
|
|
} while (s < 0 && errno == EINTR);
|
|
|
|
|
|
|
|
if (s < 0 && errno != EBADF)
|
|
|
|
ns_info(ns_log_default, "close(%d) failed: %s", fd,
|
|
|
|
strerror(errno));
|
|
|
|
else
|
|
|
|
ns_debug(ns_log_default, 3, "close(%d) succeeded", fd);
|
|
|
|
return (s);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is useful for tracking down lost file descriptors.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
my_fclose(FILE *fp) {
|
|
|
|
int fd = fileno(fp),
|
|
|
|
s = fclose(fp);
|
|
|
|
|
|
|
|
if (s < 0)
|
1999-11-30 02:43:11 +00:00
|
|
|
ns_info(ns_log_default, "fclose(%d) failed: %s", fd,
|
1998-05-03 04:11:49 +00:00
|
|
|
strerror(errno));
|
|
|
|
else
|
|
|
|
ns_debug(ns_log_default, 3, "fclose(%d) succeeded", fd);
|
|
|
|
return (s);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Save a counted buffer and return a pointer to it.
|
|
|
|
*/
|
|
|
|
u_char *
|
|
|
|
savebuf(const u_char *buf, size_t len, int needpanic) {
|
|
|
|
u_char *bp = (u_char *)memget(len);
|
|
|
|
|
|
|
|
if (bp == NULL) {
|
|
|
|
if (needpanic)
|
|
|
|
panic("savebuf: memget failed (%s)", strerror(errno));
|
|
|
|
else
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
memcpy(bp, buf, len);
|
|
|
|
return (bp);
|
|
|
|
}
|
|
|
|
|
1999-11-30 02:43:11 +00:00
|
|
|
char *
|
|
|
|
__newstr(size_t len, int needpanic) {
|
|
|
|
return (__newstr_record(len, needpanic, __FILE__, __LINE__));
|
|
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
|
|
__savestr(const char *str, int needpanic) {
|
|
|
|
return (__savestr_record(str, needpanic, __FILE__, __LINE__));
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
__freestr(char *str) {
|
|
|
|
__freestr_record(str, __FILE__, __LINE__);
|
|
|
|
}
|
|
|
|
|
1998-05-03 04:11:49 +00:00
|
|
|
#ifdef DEBUG_STRINGS
|
|
|
|
char *
|
|
|
|
debug_newstr(size_t len, int needpanic, const char *file, int line) {
|
|
|
|
size_t size;
|
|
|
|
|
|
|
|
size = len + 3; /* 2 length bytes + NUL. */
|
|
|
|
printf("%s:%d: newstr %d\n", file, line, size);
|
1999-11-30 02:43:11 +00:00
|
|
|
return (__newstr_record(len, needpanic, file, line));
|
1998-05-03 04:11:49 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
|
|
debug_savestr(const char *str, int needpanic, const char *file, int line) {
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
len = strlen(str);
|
|
|
|
len += 3; /* 2 length bytes + NUL. */
|
|
|
|
printf("%s:%d: savestr %d %s\n", file, line, len, str);
|
1999-11-30 02:43:11 +00:00
|
|
|
return (__savestr_record(str, needpanic, file, line));
|
1998-05-03 04:11:49 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
debug_freestr(char *str, const char *file, int line) {
|
|
|
|
u_char *buf, *bp;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
buf = (u_char *)str - 2/*Len*/;
|
|
|
|
bp = buf;
|
|
|
|
NS_GET16(len, bp);
|
|
|
|
len += 3; /* 2 length bytes + NUL. */
|
|
|
|
printf("%s:%d: freestr %d %s\n", file, line, len, str);
|
1999-11-30 02:43:11 +00:00
|
|
|
__freestr_record(str, file, line);
|
1998-05-03 04:11:49 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
#endif /* DEBUG_STRINGS */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return a counted string buffer big enough for a string of length 'len'.
|
|
|
|
*/
|
|
|
|
char *
|
1999-11-30 02:43:11 +00:00
|
|
|
__newstr_record(size_t len, int needpanic, char *file, int line) {
|
1998-05-03 04:11:49 +00:00
|
|
|
u_char *buf, *bp;
|
|
|
|
|
|
|
|
REQUIRE(len <= 65536);
|
|
|
|
|
1999-11-30 02:43:11 +00:00
|
|
|
buf = (u_char *)__memget_record(2/*Len*/ + len + 1/*Nul*/, file, line);
|
1998-05-03 04:11:49 +00:00
|
|
|
if (buf == NULL) {
|
|
|
|
if (needpanic)
|
|
|
|
panic("savestr: memget failed (%s)", strerror(errno));
|
|
|
|
else
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
bp = buf;
|
|
|
|
NS_PUT16(len, bp);
|
|
|
|
return ((char *)bp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Save a NUL terminated string and return a pointer to it.
|
|
|
|
*/
|
|
|
|
char *
|
1999-11-30 02:43:11 +00:00
|
|
|
__savestr_record(const char *str, int needpanic, char *file, int line) {
|
1998-05-03 04:11:49 +00:00
|
|
|
char *buf;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
len = strlen(str);
|
|
|
|
if (len > 65536) {
|
|
|
|
if (needpanic)
|
|
|
|
ns_panic(ns_log_default, 1,
|
|
|
|
"savestr: string too long");
|
|
|
|
else
|
|
|
|
return (NULL);
|
|
|
|
}
|
1999-11-30 02:43:11 +00:00
|
|
|
buf = __newstr_record(len, needpanic, file, line);
|
1998-05-03 04:11:49 +00:00
|
|
|
memcpy(buf, str, len + 1);
|
|
|
|
return (buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
1999-11-30 02:43:11 +00:00
|
|
|
__freestr_record(char *str, char *file, int line) {
|
1998-05-03 04:11:49 +00:00
|
|
|
u_char *buf, *bp;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
buf = (u_char *)str - 2/*Len*/;
|
|
|
|
bp = buf;
|
|
|
|
NS_GET16(len, bp);
|
1999-11-30 02:43:11 +00:00
|
|
|
__memput_record(buf, 2/*Len*/ + len + 1/*Nul*/, file, line);
|
1998-05-03 04:11:49 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
|
|
checked_ctime(const time_t *t) {
|
|
|
|
char *ctime_result;
|
|
|
|
|
|
|
|
ctime_result = ctime(t);
|
|
|
|
if (ctime_result == NULL) {
|
|
|
|
ns_error(ns_log_default, "ctime() returned NULL!");
|
|
|
|
ctime_result = "<unknown time>\n";
|
|
|
|
}
|
|
|
|
|
|
|
|
return (ctime_result);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Since the fields in a "struct timeval" are longs, and the argument to ctime
|
|
|
|
* is a pointer to a time_t (which might not be a long), here's a bridge.
|
|
|
|
*/
|
|
|
|
char *
|
|
|
|
ctimel(long l) {
|
|
|
|
time_t t = (time_t)l;
|
|
|
|
|
|
|
|
return (checked_ctime(&t));
|
|
|
|
}
|
1999-11-30 02:43:11 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* rename() is lame (can't overwrite an existing file) on some systems.
|
|
|
|
* use movefile() instead, and let lame OS ports do what they need to.
|
|
|
|
*/
|
|
|
|
#ifndef HAVE_MOVEFILE
|
|
|
|
int
|
|
|
|
movefile(const char *oldname, const char *newname) {
|
|
|
|
return (rename(oldname, newname));
|
|
|
|
}
|
|
|
|
#endif
|
2000-05-26 07:17:19 +00:00
|
|
|
|
|
|
|
#ifdef ultrix
|
|
|
|
/*
|
|
|
|
* Some library routines in libc need to be able to see the res_send
|
|
|
|
* and res_close symbols with out __ prefix otherwise we get multiply
|
|
|
|
* defined symbol errors when linking named.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#undef res_send
|
|
|
|
int res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) {
|
|
|
|
return __res_send(buf, buflen, ans, anssiz);
|
|
|
|
}
|
|
|
|
#undef _res_close
|
|
|
|
void _res_close(void) {
|
|
|
|
__res_close();
|
|
|
|
}
|
|
|
|
#endif
|