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fix allocation of buffer for rdata

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This commit is contained in:
Michael Graff 1999-09-10 02:42:12 +00:00
parent 3df43dad43
commit c3a4d8072c
1 changed files with 11 additions and 22 deletions
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33
lib/dns/tsig.c
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@ -16,7 +16,7 @@
*/
/*
* $Id: tsig.c,v 1.8 1999/09/02 15:56:32 bwelling Exp $
* $Id: tsig.c,v 1.9 1999/09/10 02:42:12 explorer Exp $
* Principal Author: Brian Wellington
*/
@ -185,6 +185,8 @@ dns_tsig_sign(dns_message_t *msg) {
if (is_response(msg))
REQUIRE(msg->querytsig != NULL);
dynbuf = NULL;
mctx = msg->mctx;
key = msg->tsigkey;
@ -348,34 +350,21 @@ dns_tsig_sign(dns_message_t *msg) {
tsig->signature = NULL;
}
/* There should be a better way of accessing msg->scratchpad */
rdata = NULL;
ret = dns_message_gettemprdata(msg, &rdata);
if (ret != ISC_R_SUCCESS)
goto cleanup_signature;
tries = 0;
dynbuf = ISC_LIST_TAIL(msg->scratchpad);
INSIST(dynbuf != NULL);
rdatabuf = *dynbuf;
while (tries < 2) {
ret = dns_rdata_fromstruct(rdata, dns_rdataclass_any,
dns_rdatatype_tsig, tsig, &rdatabuf);
if (ret == ISC_R_SUCCESS)
break;
else if (ret == ISC_R_NOSPACE) {
if (++tries == 2)
return (ISC_R_NOMEMORY);
ret = isc_buffer_allocate(msg->mctx, &dynbuf, 512,
ISC_BUFFERTYPE_BINARY);
if (ret != ISC_R_SUCCESS)
goto cleanup_signature;
ISC_LIST_APPEND(msg->scratchpad, dynbuf, link);
rdatabuf = *dynbuf;
}
else
goto cleanup_signature;
ret = isc_buffer_allocate(msg->mctx, &dynbuf, 512,
ISC_BUFFERTYPE_BINARY);
ret = dns_rdata_fromstruct(rdata, dns_rdataclass_any,
dns_rdatatype_tsig, tsig, dynbuf);
if (ret != ISC_R_SUCCESS) {
isc_buffer_free(&dynbuf);
goto cleanup_signature;
}
dns_message_takebuffer(msg, &dynbuf);
msg->tsig = tsig;
owner = NULL;