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Implement name, rdata, rdatalist, rdataset loanout from message resources

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This commit is contained in:
Michael Graff
1999-05-14 22:22:49 +00:00
parent 97e7d389d5
commit 438d7099d1
2 changed files with 240 additions and 10 deletions
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138
lib/dns/include/dns/message.h
View File

@@ -476,6 +476,144 @@ dns_message_addname(dns_message_t *msg, dns_name_t *name,
* 'section' be a named section.
*/
/*
* LOANOUT FUNCTIONS
*
* Each of these functions loan a particular type of data to the caller.
* The storage for these will vanish when the message is destroyed or
* reset, and must NOT be used after these operations.
*/
dns_result_t
dns_message_gettempname(dns_message_t *msg, dns_name_t **item);
/*
* Return a name that can be used for any temporary purpose, including
* inserting into the message's linked lists. The storage associated with
* this name will be destroyed when the message is destroyed or reset.
*
* It is the caller's responsibility to initialize this name.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item == NULL
*
* Returns:
* DNS_R_SUCCESS -- All is well.
* DNS_R_NOMEMORY -- No item can be allocated.
*/
dns_result_t
dns_message_gettemprdata(dns_message_t *msg, dns_rdata_t **item);
/*
* Return a rdata that can be used for any temporary purpose, including
* inserting into the message's linked lists. The storage associated with
* this rdata will be destroyed when the message is destroyed or reset.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item == NULL
*
* Returns:
* DNS_R_SUCCESS -- All is well.
* DNS_R_NOMEMORY -- No item can be allocated.
*/
dns_result_t
dns_message_gettemprdataset(dns_message_t *msg, dns_rdataset_t **item);
/*
* Return a rdataset that can be used for any temporary purpose, including
* inserting into the message's linked lists. The storage associated with
* this rdataset will be destroyed when the message is destroyed or reset.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item == NULL
*
* Returns:
* DNS_R_SUCCESS -- All is well.
* DNS_R_NOMEMORY -- No item can be allocated.
*/
dns_result_t
dns_message_gettemprdatalist(dns_message_t *msg, dns_rdatalist_t **item);
/*
* Return a rdatalist that can be used for any temporary purpose, including
* inserting into the message's linked lists. The storage associated with
* this rdatalist will be destroyed when the message is destroyed or reset.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item == NULL
*
* Returns:
* DNS_R_SUCCESS -- All is well.
* DNS_R_NOMEMORY -- No item can be allocated.
*/
void
dns_message_puttempname(dns_message_t *msg, dns_name_t **item);
/*
* Return a borrowed name to the message's name free list.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item point to a name returned by
* dns_message_gettempname()
*
* Ensures:
* *item == NULL
*/
void
dns_message_puttemprdata(dns_message_t *msg, dns_rdata_t **item);
/*
* Return a borrowed rdata to the message's rdata free list.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item point to a rdata returned by
* dns_message_gettemprdata()
*
* Ensures:
* *item == NULL
*/
void
dns_message_puttemprdataset(dns_message_t *msg, dns_rdataset_t **item);
/*
* Return a borrowed rdataset to the message's rdataset free list.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item point to a rdataset returned by
* dns_message_gettemprdataset()
*
* Ensures:
* *item == NULL
*/
void
dns_message_puttemprdatalist(dns_message_t *msg, dns_rdatalist_t **item);
/*
* Return a borrowed rdatalist to the message's rdatalist free list.
*
* Requires:
* msg be a valid message
*
* item != NULL && *item point to a rdatalist returned by
* dns_message_gettemprdatalist()
*
* Ensures:
* *item == NULL
*/
ISC_LANG_ENDDECLS
#endif /* DNS_DNS_H */

112
lib/dns/message.c
View File

@@ -470,7 +470,7 @@ msgreset(dns_message_t *msg, isc_boolean_t everything)
}
dns_result_t
dns_message_create(isc_mem_t *mctx, dns_message_t **msg, unsigned int intent)
dns_message_create(isc_mem_t *mctx, dns_message_t **msgp, unsigned int intent)
{
dns_message_t *m;
isc_result_t iresult;
@@ -479,8 +479,8 @@ dns_message_create(isc_mem_t *mctx, dns_message_t **msg, unsigned int intent)
unsigned int i;
REQUIRE(mctx != NULL);
REQUIRE(msg != NULL);
REQUIRE(*msg == NULL);
REQUIRE(msgp != NULL);
REQUIRE(*msgp == NULL);
REQUIRE(intent == DNS_MESSAGE_INTENTPARSE
|| intent == DNS_MESSAGE_INTENTRENDER);
@@ -532,7 +532,7 @@ dns_message_create(isc_mem_t *mctx, dns_message_t **msg, unsigned int intent)
ISC_LIST_APPEND(m->rdatalists, msgblock, link);
}
*msg = m;
*msgp = m;
return (DNS_R_SUCCESS);
/*
@@ -564,15 +564,15 @@ dns_message_reset(dns_message_t *msg)
}
void
dns_message_destroy(dns_message_t **xmsg)
dns_message_destroy(dns_message_t **msgp)
{
dns_message_t *msg;
REQUIRE(xmsg != NULL);
REQUIRE(VALID_MESSAGE(*xmsg));
REQUIRE(msgp != NULL);
REQUIRE(VALID_MESSAGE(*msgp));
msg = *xmsg;
*xmsg = NULL;
msg = *msgp;
*msgp = NULL;
msgreset(msg, ISC_TRUE);
msg->magic = 0;
@@ -1150,7 +1150,7 @@ dns_message_renderreserve(dns_message_t *msg, unsigned int space)
dns_result_t
dns_message_rendersection(dns_message_t *msg, dns_section_t sectionid,
unsigned int priority, unsigned int flags)
unsigned int priority, unsigned int options)
{
unsigned int used;
dns_namelist_t *section;
@@ -1380,3 +1380,95 @@ dns_message_addname(dns_message_t *msg, dns_name_t *name,
ISC_LIST_APPEND(msg->sections[section], name, link);
}
dns_result_t
dns_message_gettempname(dns_message_t *msg, dns_name_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item == NULL);
*item = newname(msg);
if (*item == NULL)
return (DNS_R_NOMEMORY);
return (DNS_R_SUCCESS);
}
dns_result_t
dns_message_gettemprdata(dns_message_t *msg, dns_rdata_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item == NULL);
*item = newrdata(msg);
if (*item == NULL)
return (DNS_R_NOMEMORY);
return (DNS_R_SUCCESS);
}
dns_result_t
dns_message_gettemprdataset(dns_message_t *msg, dns_rdataset_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item == NULL);
*item = newrdataset(msg);
if (*item == NULL)
return (DNS_R_NOMEMORY);
return (DNS_R_SUCCESS);
}
dns_result_t
dns_message_gettemprdatalist(dns_message_t *msg, dns_rdatalist_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item == NULL);
*item = newrdatalist(msg);
if (*item == NULL)
return (DNS_R_NOMEMORY);
return (DNS_R_SUCCESS);
}
void
dns_message_puttempname(dns_message_t *msg, dns_name_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item != NULL);
releasename(msg, *item);
*item = NULL;
}
void
dns_message_puttemprdata(dns_message_t *msg, dns_rdata_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item != NULL);
releaserdata(msg, *item);
*item = NULL;
}
void
dns_message_puttemprdataset(dns_message_t *msg, dns_rdataset_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item != NULL);
releaserdataset(msg, *item);
*item = NULL;
}
void
dns_message_puttemprdatalist(dns_message_t *msg, dns_rdatalist_t **item)
{
REQUIRE(VALID_MESSAGE(msg));
REQUIRE(item != NULL && *item != NULL);
releaserdatalist(msg, *item);
*item = NULL;
}