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Code Issues Releases Wiki Activity

Add decompression.

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This commit is contained in:
Mark Andrews
1999-02-24 06:31:35 +00:00
parent 1783fac3a1
commit 1ef8965366
63 changed files with 748 additions and 99 deletions
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95
lib/dns/compress.c
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@@ -15,7 +15,7 @@
* SOFTWARE.
*/
/* $Id: compress.c,v 1.2 1999/02/23 02:25:39 marka Exp $ */
/* $Id: compress.c,v 1.3 1999/02/24 06:31:31 marka Exp $ */
#include <config.h>
@@ -25,9 +25,12 @@
#include <dns/compress.h>
#define CCTX_MAGIC 0x43435458U
#define CCTX_MAGIC 0x43435458U /* CCTX */
#define VALID_CCTX(x) ((x) != NULL && (x)->magic == CCTX_MAGIC)
#define DCTX_MAGIC 0x44435458U /* DCTX */
#define VALID_DCTX(x) ((x) != NULL && (x)->magic == DCTX_MAGIC)
static void free_offset(void *offset, void *mctx);
isc_boolean_t compress_find(dns_rbt_t *root, dns_name_t *name,
dns_name_t *prefix, dns_name_t *suffix,
@@ -37,6 +40,9 @@ void compress_add(dns_rbt_t *root, dns_name_t *prefix,
dns_name_t *suffix, isc_uint16_t offset,
isc_boolean_t global16, isc_mem_t *mctx);
/***
*** Compression
***/
dns_result_t
dns_compress_init(dns_compress_t *cctx, int edns, isc_mem_t *mctx)
@@ -82,7 +88,7 @@ dns_compress_localinit(dns_compress_t *cctx, dns_name_t *owner,
REQUIRE(VALID_CCTX(cctx));
REQUIRE(cctx->local == NULL);
REQUIRE(dns_name_isabsolute(owner) == ISC_TRUE);
REQUIRE(target != NULL);
REQUIRE(isc_buffer_type(target) == ISC_BUFFERTYPE_BINARY);
result = dns_rbt_create(cctx->mctx, free_offset, cctx->mctx,
&cctx->local);
@@ -107,7 +113,7 @@ dns_compress_localinit(dns_compress_t *cctx, dns_name_t *owner,
while (labels > 0) {
dns_name_getlabelsequence(owner, wl, labels, &name);
data = isc_mem_get(cctx->mctx, sizeof *data);
if (data != NULL)
if (data == NULL)
return (DNS_R_SUCCESS);
*data = ll;
result = dns_rbt_addname(cctx->local, &name, data);
@@ -143,7 +149,7 @@ dns_compress_localinit(dns_compress_t *cctx, dns_name_t *owner,
if (result != DNS_R_SUCCESS)
return (DNS_R_SUCCESS);
data = isc_mem_get(cctx->mctx, sizeof *data);
if (data != NULL)
if (data == NULL)
return (DNS_R_SUCCESS);
*data = ll;
result = dns_rbt_addname(cctx->local, &name, data);
@@ -259,6 +265,85 @@ dns_compress_backout(dns_compress_t *cctx, isc_uint16_t offset) {
}
/***
*** Decompression
***/
void
dns_decompress_init(dns_decompress_t *dctx, int edns, isc_boolean_t strict) {
REQUIRE(dctx != NULL);
REQUIRE(edns >= -1 && edns <= 255);
dctx->allowed = DNS_COMPRESS_NONE;
dctx->edns = edns;
dctx->strict = strict;
dctx->rdata = 0;
dns_name_init(&dctx->owner_name, NULL);
dns_name_invalidate(&dctx->owner_name);
dctx->magic = DCTX_MAGIC;
}
void
dns_decompress_localinit(dns_decompress_t *dctx, dns_name_t *name,
isc_buffer_t *source)
{
REQUIRE(VALID_DCTX(dctx));
REQUIRE(dns_name_isabsolute(name) == ISC_TRUE);
REQUIRE(isc_buffer_type(source) == ISC_BUFFERTYPE_BINARY);
dctx->rdata = source->current;
dctx->owner_name = *name;
}
void
dns_decompress_invalidate(dns_decompress_t *dctx) {
REQUIRE(VALID_DCTX(dctx));
dctx->magic = 0;
}
void
dns_decompress_localinvalidate(dns_decompress_t *dctx) {
REQUIRE(VALID_DCTX(dctx));
dns_name_invalidate(&dctx->owner_name);
}
void
dns_decompress_setmethods(dns_decompress_t *dctx, unsigned int allowed) {
REQUIRE(VALID_DCTX(dctx));
dctx->allowed = allowed;
}
unsigned int
dns_decompress_getmethods(dns_decompress_t *dctx) {
REQUIRE(VALID_DCTX(dctx));
return (dctx->allowed);
}
int
dns_decompress_edns(dns_decompress_t *dctx) {
REQUIRE(VALID_DCTX(dctx));
return (dctx->edns);
}
isc_boolean_t
dns_decompress_strict(dns_decompress_t *dctx) {
REQUIRE(VALID_DCTX(dctx));
return (dctx->strict);
}
/***
*** Private
***/