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Update forwarding when the message buffer was no longer copied. Fix this

Browse source 
by having the update forwarding code tell dns_message_parse to copy
the buffer.
This commit is contained in:
Brian Wellington 2001-01-05 00:17:33 +00:00
parent 233085a7d2
commit efcd383461
3 changed files with 35 additions and 10 deletions
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6
lib/dns/include/dns/message.h
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: message.h,v 1.85 2001/01/04 01:25:08 bwelling Exp $ */
/* $Id: message.h,v 1.86 2001/01/05 00:17:33 bwelling Exp $ */
#ifndef DNS_MESSAGE_H
#define DNS_MESSAGE_H 1
@ -149,6 +149,8 @@ typedef int dns_messagetextflag_t;
#define DNS_MESSAGEPARSE_BESTEFFORT 0x0002 /* return a message if a
recoverable parse error
occurs */
#define DNS_MESSAGEPARSE_CLONEBUFFER 0x0004 /* save a copy of the
source buffer */
/*
* Control behavior of rendering
@ -185,6 +187,8 @@ struct dns_message {
unsigned int tcp_continuation : 1;
unsigned int verified_sig : 1;
unsigned int verify_attempted : 1;
unsigned int free_query : 1;
unsigned int free_saved : 1;
unsigned int opt_reserved;
unsigned int sig_reserved;

34
lib/dns/message.c
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: message.c,v 1.167 2001/01/04 01:55:22 bwelling Exp $ */
/* $Id: message.c,v 1.168 2001/01/05 00:17:29 bwelling Exp $ */
/***
*** Imports
@ -355,11 +355,6 @@ msginittsig(dns_message_t *m) {
m->sigstart = -1;
m->sig0key = NULL;
m->sig0status = dns_rcode_noerror;
m->query.base = NULL;
m->query.length = 0;
m->saved.base = NULL;
m->saved.length = 0;
m->querytsig = NULL;
}
/*
@ -378,6 +373,13 @@ msginit(dns_message_t *m) {
m->verify_attempted = 0;
m->order = NULL;
m->order_arg = NULL;
m->query.base = NULL;
m->query.length = 0;
m->free_query = 0;
m->saved.base = NULL;
m->saved.length = 0;
m->free_saved = 0;
m->querytsig = NULL;
}
static inline void
@ -558,11 +560,17 @@ msgreset(dns_message_t *msg, isc_boolean_t everything) {
}
if (msg->query.base != NULL) {
if (msg->free_query != 0)
isc_mem_put(msg->mctx, msg->query.base,
msg->query.length);
msg->query.base = NULL;
msg->query.length = 0;
}
if (msg->saved.base != NULL) {
if (msg->free_saved != 0)
isc_mem_put(msg->mctx, msg->saved.base,
msg->saved.length);
msg->saved.base = NULL;
msg->saved.length = 0;
}
@ -1538,7 +1546,17 @@ dns_message_parse(dns_message_t *msg, isc_buffer_t *source,
r.length);
}
isc_buffer_usedregion(&origsource, &msg->saved);
if ((options & DNS_MESSAGEPARSE_CLONEBUFFER) == 0)
isc_buffer_usedregion(&origsource, &msg->saved);
else {
msg->saved.length = isc_buffer_usedlength(&origsource);
msg->saved.base = isc_mem_get(msg->mctx, msg->saved.length);
if (msg->saved.base == NULL)
return (ISC_R_NOMEMORY);
memcpy(msg->saved.base, isc_buffer_base(&origsource),
msg->saved.length);
msg->free_saved = 1;
}
if (seen_problem == ISC_TRUE)
return (DNS_R_RECOVERABLE);
@ -2255,8 +2273,10 @@ dns_message_reply(dns_message_t *msg, isc_boolean_t want_question_section) {
if (msg->saved.base != NULL) {
msg->query.base = msg->saved.base;
msg->query.length = msg->saved.length;
msg->free_query = msg->free_saved;
msg->saved.base = NULL;
msg->saved.length = 0;
msg->free_saved = 0;
}
return (ISC_R_SUCCESS);

5
lib/dns/zone.c
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: zone.c,v 1.287 2001/01/04 04:10:59 marka Exp $ */
/* $Id: zone.c,v 1.288 2001/01/05 00:17:31 bwelling Exp $ */
#include <config.h>
@ -4993,7 +4993,8 @@ forward_callback(isc_task_t *task, isc_event_t *event) {
goto next_master;
result = dns_request_getresponse(revent->request, msg,
DNS_MESSAGEPARSE_PRESERVEORDER);
DNS_MESSAGEPARSE_PRESERVEORDER |
DNS_MESSAGEPARSE_CLONEBUFFER);
if (result != ISC_R_SUCCESS)
goto next_master;