ComputerSurge/bind9
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Make a6 follower restartable.

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This commit is contained in:
Bob Halley
1999-09-17 21:51:22 +00:00
parent 91cf68b183
commit e5c243997c
2 changed files with 49 additions and 15 deletions
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48
lib/dns/a6.c
View File

@@ -104,9 +104,17 @@ foreach(dns_a6context_t *a6ctx, dns_rdataset_t *parent, unsigned int depth,
/*
* We can't follow this chain, because
* we don't know the next link.
*
* We update the 'depth' and
* 'prefixlen' values so that the
* missing function can make a copy
* of the a6context and resume
* processing after it has found the
* missing a6 context.
*/
(a6ctx->missing)(a6ctx->arg, &name,
dns_rdatatype_a6);
a6ctx->depth = depth;
a6ctx->prefixlen = prefixlen;
(a6ctx->missing)(a6ctx, &name);
}
}
} else {
@@ -131,7 +139,7 @@ foreach(dns_a6context_t *a6ctx, dns_rdataset_t *parent, unsigned int depth,
void
dns_a6_init(dns_a6context_t *a6ctx, dns_findfunc_t find, dns_rrsetfunc_t rrset,
dns_in6addrfunc_t address, dns_missingfunc_t missing, void *arg)
dns_in6addrfunc_t address, dns_a6missingfunc_t missing, void *arg)
{
REQUIRE(a6ctx != NULL);
REQUIRE(a6ctx->find != NULL);
@@ -142,7 +150,21 @@ dns_a6_init(dns_a6context_t *a6ctx, dns_findfunc_t find, dns_rrsetfunc_t rrset,
a6ctx->missing = missing;
a6ctx->address = address;
a6ctx->arg = arg;
a6ctx->chains = 0;
a6ctx->chains = 1;
a6ctx->depth = 0;
a6ctx->prefixlen = 128;
isc_bitstring_init(&a6ctx->bitstring,
(unsigned char *)&a6ctx->in6addr.s6_addr,
128, 128, ISC_TRUE);
}
void
dns_a6_reset(dns_a6context_t *a6ctx) {
REQUIRE(VALID_A6CONTEXT(a6ctx));
a6ctx->chains = 1;
a6ctx->depth = 0;
a6ctx->prefixlen = 128;
}
void
@@ -152,6 +174,17 @@ dns_a6_invalidate(dns_a6context_t *a6ctx) {
a6ctx->magic = 0;
}
void
dns_a6_copy(dns_a6context_t *source, dns_a6context_t *target) {
REQUIRE(VALID_A6CONTEXT(source));
REQUIRE(VALID_A6CONTEXT(target));
*target = *source;
isc_bitstring_init(&target->bitstring,
(unsigned char *)&target->in6addr.s6_addr,
128, 128, ISC_TRUE);
}
isc_result_t
dns_a6_foreach(dns_a6context_t *a6ctx, dns_rdataset_t *rdataset) {
isc_result_t result;
@@ -159,12 +192,7 @@ dns_a6_foreach(dns_a6context_t *a6ctx, dns_rdataset_t *rdataset) {
REQUIRE(VALID_A6CONTEXT(a6ctx));
REQUIRE(rdataset->type == dns_rdatatype_a6);
a6ctx->chains = 1;
isc_bitstring_init(&a6ctx->bitstring,
(unsigned char *)&a6ctx->in6addr.s6_addr,
128, 128, ISC_TRUE);
result = foreach(a6ctx, rdataset, 0, 128);
result = foreach(a6ctx, rdataset, a6ctx->depth, a6ctx->prefixlen);
if (result == ISC_R_QUOTA)
result = ISC_R_SUCCESS;

16
lib/dns/include/dns/a6.h
View File

@@ -39,8 +39,7 @@ typedef void (*dns_rrsetfunc_t)(void *arg, dns_name_t *name,
typedef void (*dns_in6addrfunc_t)(void *arg, struct in6_addr *address);
typedef void (*dns_missingfunc_t)(void *arg, dns_name_t *name,
dns_rdatatype_t type);
typedef void (*dns_a6missingfunc_t)(dns_a6context_t *a6ctx, dns_name_t *name);
struct dns_a6context {
unsigned int magic;
@@ -48,21 +47,28 @@ struct dns_a6context {
dns_findfunc_t find;
dns_rrsetfunc_t rrset;
dns_in6addrfunc_t address;
dns_missingfunc_t missing;
dns_a6missingfunc_t missing;
void * arg;
/* Private. */
unsigned int chains;
unsigned int depth;
unsigned int prefixlen;
struct in6_addr in6addr;
isc_bitstring_t bitstring;
};
void
dns_a6_init(dns_a6context_t *a6ctx, dns_findfunc_t find, dns_rrsetfunc_t rrset,
dns_in6addrfunc_t address, dns_missingfunc_t missing, void *arg);
dns_in6addrfunc_t address, dns_a6missingfunc_t missing, void *arg);
void
dns_a6_reset(dns_a6context_t *a6ctx);
void
dns_a6_invalidate(dns_a6context_t *a6ctx);
void
dns_a6_copy(dns_a6context_t *source, dns_a6context_t *target);
isc_result_t
dns_a6_foreach(dns_a6context_t *a6ctx, dns_rdataset_t *rdataset);