aboutsummaryrefslogtreecommitdiff
path: root/contrib/bind9/lib/lwres/lwres_gabn.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/bind9/lib/lwres/lwres_gabn.c')
-rw-r--r--contrib/bind9/lib/lwres/lwres_gabn.c505
1 files changed, 0 insertions, 505 deletions
diff --git a/contrib/bind9/lib/lwres/lwres_gabn.c b/contrib/bind9/lib/lwres/lwres_gabn.c
deleted file mode 100644
index c6f113971503..000000000000
--- a/contrib/bind9/lib/lwres/lwres_gabn.c
+++ /dev/null
@@ -1,505 +0,0 @@
-/*
- * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000, 2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-/* $Id: lwres_gabn.c,v 1.29.18.2 2005/04/29 00:17:19 marka Exp $ */
-
-/*! \file lwres_gabn.c
- These are low-level routines for creating and parsing lightweight
- resolver name-to-address lookup request and response messages.
-
- There are four main functions for the getaddrbyname opcode. One render
- function converts a getaddrbyname request structure --
- lwres_gabnrequest_t -- to the lighweight resolver's canonical format.
- It is complemented by a parse function that converts a packet in this
- canonical format to a getaddrbyname request structure. Another render
- function converts the getaddrbyname response structure --
- lwres_gabnresponse_t -- to the canonical format. This is complemented
- by a parse function which converts a packet in canonical format to a
- getaddrbyname response structure.
-
- These structures are defined in \link lwres.h <lwres/lwres.h>.\endlink They are shown below.
-
-\code
-#define LWRES_OPCODE_GETADDRSBYNAME 0x00010001U
-
-typedef struct lwres_addr lwres_addr_t;
-typedef LWRES_LIST(lwres_addr_t) lwres_addrlist_t;
-
-typedef struct {
- lwres_uint32_t flags;
- lwres_uint32_t addrtypes;
- lwres_uint16_t namelen;
- char *name;
-} lwres_gabnrequest_t;
-
-typedef struct {
- lwres_uint32_t flags;
- lwres_uint16_t naliases;
- lwres_uint16_t naddrs;
- char *realname;
- char **aliases;
- lwres_uint16_t realnamelen;
- lwres_uint16_t *aliaslen;
- lwres_addrlist_t addrs;
- void *base;
- size_t baselen;
-} lwres_gabnresponse_t;
-\endcode
-
- lwres_gabnrequest_render() uses resolver context ctx to convert
- getaddrbyname request structure req to canonical format. The packet
- header structure pkt is initialised and transferred to buffer b. The
- contents of *req are then appended to the buffer in canonical format.
- lwres_gabnresponse_render() performs the same task, except it converts
- a getaddrbyname response structure lwres_gabnresponse_t to the
- lightweight resolver's canonical format.
-
- lwres_gabnrequest_parse() uses context ctx to convert the contents of
- packet pkt to a lwres_gabnrequest_t structure. Buffer b provides space
- to be used for storing this structure. When the function succeeds, the
- resulting lwres_gabnrequest_t is made available through *structp.
- lwres_gabnresponse_parse() offers the same semantics as
- lwres_gabnrequest_parse() except it yields a lwres_gabnresponse_t
- structure.
-
- lwres_gabnresponse_free() and lwres_gabnrequest_free() release the
- memory in resolver context ctx that was allocated to the
- lwres_gabnresponse_t or lwres_gabnrequest_t structures referenced via
- structp. Any memory associated with ancillary buffers and strings for
- those structures is also discarded.
-
-\section lwres_gabn_return Return Values
-
- The getaddrbyname opcode functions lwres_gabnrequest_render(),
- lwres_gabnresponse_render() lwres_gabnrequest_parse() and
- lwres_gabnresponse_parse() all return #LWRES_R_SUCCESS on success. They
- return #LWRES_R_NOMEMORY if memory allocation fails.
- #LWRES_R_UNEXPECTEDEND is returned if the available space in the buffer
- b is too small to accommodate the packet header or the
- lwres_gabnrequest_t and lwres_gabnresponse_t structures.
- lwres_gabnrequest_parse() and lwres_gabnresponse_parse() will return
- #LWRES_R_UNEXPECTEDEND if the buffer is not empty after decoding the
- received packet. These functions will return #LWRES_R_FAILURE if
- pktflags in the packet header structure #lwres_lwpacket_t indicate that
- the packet is not a response to an earlier query.
-
-\section lwres_gabn_see See Also
-
- \link lwpacket.c lwres_lwpacket \endlink
- */
-
-#include <config.h>
-
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <lwres/lwbuffer.h>
-#include <lwres/lwpacket.h>
-#include <lwres/lwres.h>
-#include <lwres/result.h>
-
-#include "context_p.h"
-#include "assert_p.h"
-
-/*% uses resolver context ctx to convert getaddrbyname request structure req to canonical format. */
-lwres_result_t
-lwres_gabnrequest_render(lwres_context_t *ctx, lwres_gabnrequest_t *req,
- lwres_lwpacket_t *pkt, lwres_buffer_t *b)
-{
- unsigned char *buf;
- size_t buflen;
- int ret;
- size_t payload_length;
- lwres_uint16_t datalen;
-
- REQUIRE(ctx != NULL);
- REQUIRE(req != NULL);
- REQUIRE(req->name != NULL);
- REQUIRE(pkt != NULL);
- REQUIRE(b != NULL);
-
- datalen = strlen(req->name);
-
- payload_length = 4 + 4 + 2 + req->namelen + 1;
-
- buflen = LWRES_LWPACKET_LENGTH + payload_length;
- buf = CTXMALLOC(buflen);
- if (buf == NULL)
- return (LWRES_R_NOMEMORY);
-
- lwres_buffer_init(b, buf, buflen);
-
- pkt->length = buflen;
- pkt->version = LWRES_LWPACKETVERSION_0;
- pkt->pktflags &= ~LWRES_LWPACKETFLAG_RESPONSE;
- pkt->opcode = LWRES_OPCODE_GETADDRSBYNAME;
- pkt->result = 0;
- pkt->authtype = 0;
- pkt->authlength = 0;
-
- ret = lwres_lwpacket_renderheader(b, pkt);
- if (ret != LWRES_R_SUCCESS) {
- lwres_buffer_invalidate(b);
- CTXFREE(buf, buflen);
- return (ret);
- }
-
- INSIST(SPACE_OK(b, payload_length));
-
- /*
- * Flags.
- */
- lwres_buffer_putuint32(b, req->flags);
-
- /*
- * Address types we'll accept.
- */
- lwres_buffer_putuint32(b, req->addrtypes);
-
- /*
- * Put the length and the data. We know this will fit because we
- * just checked for it.
- */
- lwres_buffer_putuint16(b, datalen);
- lwres_buffer_putmem(b, (unsigned char *)req->name, datalen);
- lwres_buffer_putuint8(b, 0); /* trailing NUL */
-
- INSIST(LWRES_BUFFER_AVAILABLECOUNT(b) == 0);
-
- return (LWRES_R_SUCCESS);
-}
-/*% converts a getaddrbyname response structure lwres_gabnresponse_t to the lightweight resolver's canonical format. */
-lwres_result_t
-lwres_gabnresponse_render(lwres_context_t *ctx, lwres_gabnresponse_t *req,
- lwres_lwpacket_t *pkt, lwres_buffer_t *b)
-{
- unsigned char *buf;
- size_t buflen;
- int ret;
- size_t payload_length;
- lwres_uint16_t datalen;
- lwres_addr_t *addr;
- int x;
-
- REQUIRE(ctx != NULL);
- REQUIRE(req != NULL);
- REQUIRE(pkt != NULL);
- REQUIRE(b != NULL);
-
- /* naliases, naddrs */
- payload_length = 4 + 2 + 2;
- /* real name encoding */
- payload_length += 2 + req->realnamelen + 1;
- /* each alias */
- for (x = 0; x < req->naliases; x++)
- payload_length += 2 + req->aliaslen[x] + 1;
- /* each address */
- x = 0;
- addr = LWRES_LIST_HEAD(req->addrs);
- while (addr != NULL) {
- payload_length += 4 + 2;
- payload_length += addr->length;
- addr = LWRES_LIST_NEXT(addr, link);
- x++;
- }
- INSIST(x == req->naddrs);
-
- buflen = LWRES_LWPACKET_LENGTH + payload_length;
- buf = CTXMALLOC(buflen);
- if (buf == NULL)
- return (LWRES_R_NOMEMORY);
- lwres_buffer_init(b, buf, buflen);
-
- pkt->length = buflen;
- pkt->version = LWRES_LWPACKETVERSION_0;
- pkt->pktflags |= LWRES_LWPACKETFLAG_RESPONSE;
- pkt->opcode = LWRES_OPCODE_GETADDRSBYNAME;
- pkt->authtype = 0;
- pkt->authlength = 0;
-
- ret = lwres_lwpacket_renderheader(b, pkt);
- if (ret != LWRES_R_SUCCESS) {
- lwres_buffer_invalidate(b);
- CTXFREE(buf, buflen);
- return (ret);
- }
-
- /*
- * Check space needed here.
- */
- INSIST(SPACE_OK(b, payload_length));
-
- /* Flags. */
- lwres_buffer_putuint32(b, req->flags);
-
- /* encode naliases and naddrs */
- lwres_buffer_putuint16(b, req->naliases);
- lwres_buffer_putuint16(b, req->naddrs);
-
- /* encode the real name */
- datalen = req->realnamelen;
- lwres_buffer_putuint16(b, datalen);
- lwres_buffer_putmem(b, (unsigned char *)req->realname, datalen);
- lwres_buffer_putuint8(b, 0);
-
- /* encode the aliases */
- for (x = 0; x < req->naliases; x++) {
- datalen = req->aliaslen[x];
- lwres_buffer_putuint16(b, datalen);
- lwres_buffer_putmem(b, (unsigned char *)req->aliases[x],
- datalen);
- lwres_buffer_putuint8(b, 0);
- }
-
- /* encode the addresses */
- addr = LWRES_LIST_HEAD(req->addrs);
- while (addr != NULL) {
- lwres_buffer_putuint32(b, addr->family);
- lwres_buffer_putuint16(b, addr->length);
- lwres_buffer_putmem(b, addr->address, addr->length);
- addr = LWRES_LIST_NEXT(addr, link);
- }
-
- INSIST(LWRES_BUFFER_AVAILABLECOUNT(b) == 0);
- INSIST(LWRES_BUFFER_USEDCOUNT(b) == pkt->length);
-
- return (LWRES_R_SUCCESS);
-}
-/*% Uses context ctx to convert the contents of packet pkt to a lwres_gabnrequest_t structure. */
-lwres_result_t
-lwres_gabnrequest_parse(lwres_context_t *ctx, lwres_buffer_t *b,
- lwres_lwpacket_t *pkt, lwres_gabnrequest_t **structp)
-{
- int ret;
- char *name;
- lwres_gabnrequest_t *gabn;
- lwres_uint32_t addrtypes;
- lwres_uint32_t flags;
- lwres_uint16_t namelen;
-
- REQUIRE(ctx != NULL);
- REQUIRE(pkt != NULL);
- REQUIRE(b != NULL);
- REQUIRE(structp != NULL && *structp == NULL);
-
- if ((pkt->pktflags & LWRES_LWPACKETFLAG_RESPONSE) != 0)
- return (LWRES_R_FAILURE);
-
- if (!SPACE_REMAINING(b, 4 + 4))
- return (LWRES_R_UNEXPECTEDEND);
-
- flags = lwres_buffer_getuint32(b);
- addrtypes = lwres_buffer_getuint32(b);
-
- /*
- * Pull off the name itself
- */
- ret = lwres_string_parse(b, &name, &namelen);
- if (ret != LWRES_R_SUCCESS)
- return (ret);
-
- if (LWRES_BUFFER_REMAINING(b) != 0)
- return (LWRES_R_TRAILINGDATA);
-
- gabn = CTXMALLOC(sizeof(lwres_gabnrequest_t));
- if (gabn == NULL)
- return (LWRES_R_NOMEMORY);
-
- gabn->flags = flags;
- gabn->addrtypes = addrtypes;
- gabn->name = name;
- gabn->namelen = namelen;
-
- *structp = gabn;
- return (LWRES_R_SUCCESS);
-}
-
-/*% Offers the same semantics as lwres_gabnrequest_parse() except it yields a lwres_gabnresponse_t structure. */
-
-lwres_result_t
-lwres_gabnresponse_parse(lwres_context_t *ctx, lwres_buffer_t *b,
- lwres_lwpacket_t *pkt, lwres_gabnresponse_t **structp)
-{
- lwres_result_t ret;
- unsigned int x;
- lwres_uint32_t flags;
- lwres_uint16_t naliases;
- lwres_uint16_t naddrs;
- lwres_gabnresponse_t *gabn;
- lwres_addrlist_t addrlist;
- lwres_addr_t *addr;
-
- REQUIRE(ctx != NULL);
- REQUIRE(pkt != NULL);
- REQUIRE(b != NULL);
- REQUIRE(structp != NULL && *structp == NULL);
-
- gabn = NULL;
-
- if ((pkt->pktflags & LWRES_LWPACKETFLAG_RESPONSE) == 0)
- return (LWRES_R_FAILURE);
-
- /*
- * Pull off the name itself
- */
- if (!SPACE_REMAINING(b, 4 + 2 + 2))
- return (LWRES_R_UNEXPECTEDEND);
- flags = lwres_buffer_getuint32(b);
- naliases = lwres_buffer_getuint16(b);
- naddrs = lwres_buffer_getuint16(b);
-
- gabn = CTXMALLOC(sizeof(lwres_gabnresponse_t));
- if (gabn == NULL)
- return (LWRES_R_NOMEMORY);
- gabn->aliases = NULL;
- gabn->aliaslen = NULL;
- LWRES_LIST_INIT(gabn->addrs);
- gabn->base = NULL;
-
- gabn->flags = flags;
- gabn->naliases = naliases;
- gabn->naddrs = naddrs;
-
- LWRES_LIST_INIT(addrlist);
-
- if (naliases > 0) {
- gabn->aliases = CTXMALLOC(sizeof(char *) * naliases);
- if (gabn->aliases == NULL) {
- ret = LWRES_R_NOMEMORY;
- goto out;
- }
-
- gabn->aliaslen = CTXMALLOC(sizeof(lwres_uint16_t) * naliases);
- if (gabn->aliaslen == NULL) {
- ret = LWRES_R_NOMEMORY;
- goto out;
- }
- }
-
- for (x = 0; x < naddrs; x++) {
- addr = CTXMALLOC(sizeof(lwres_addr_t));
- if (addr == NULL) {
- ret = LWRES_R_NOMEMORY;
- goto out;
- }
- LWRES_LINK_INIT(addr, link);
- LWRES_LIST_APPEND(addrlist, addr, link);
- }
-
- /*
- * Now, pull off the real name.
- */
- ret = lwres_string_parse(b, &gabn->realname, &gabn->realnamelen);
- if (ret != LWRES_R_SUCCESS)
- goto out;
-
- /*
- * Parse off the aliases.
- */
- for (x = 0; x < gabn->naliases; x++) {
- ret = lwres_string_parse(b, &gabn->aliases[x],
- &gabn->aliaslen[x]);
- if (ret != LWRES_R_SUCCESS)
- goto out;
- }
-
- /*
- * Pull off the addresses. We already strung the linked list
- * up above.
- */
- addr = LWRES_LIST_HEAD(addrlist);
- for (x = 0; x < gabn->naddrs; x++) {
- INSIST(addr != NULL);
- ret = lwres_addr_parse(b, addr);
- if (ret != LWRES_R_SUCCESS)
- goto out;
- addr = LWRES_LIST_NEXT(addr, link);
- }
-
- if (LWRES_BUFFER_REMAINING(b) != 0) {
- ret = LWRES_R_TRAILINGDATA;
- goto out;
- }
-
- gabn->addrs = addrlist;
-
- *structp = gabn;
- return (LWRES_R_SUCCESS);
-
- out:
- if (gabn != NULL) {
- if (gabn->aliases != NULL)
- CTXFREE(gabn->aliases, sizeof(char *) * naliases);
- if (gabn->aliaslen != NULL)
- CTXFREE(gabn->aliaslen,
- sizeof(lwres_uint16_t) * naliases);
- addr = LWRES_LIST_HEAD(addrlist);
- while (addr != NULL) {
- LWRES_LIST_UNLINK(addrlist, addr, link);
- CTXFREE(addr, sizeof(lwres_addr_t));
- addr = LWRES_LIST_HEAD(addrlist);
- }
- CTXFREE(gabn, sizeof(lwres_gabnresponse_t));
- }
-
- return (ret);
-}
-
-/*% Release the memory in resolver context ctx that was allocated to the lwres_gabnrequest_t. */
-void
-lwres_gabnrequest_free(lwres_context_t *ctx, lwres_gabnrequest_t **structp)
-{
- lwres_gabnrequest_t *gabn;
-
- REQUIRE(ctx != NULL);
- REQUIRE(structp != NULL && *structp != NULL);
-
- gabn = *structp;
- *structp = NULL;
-
- CTXFREE(gabn, sizeof(lwres_gabnrequest_t));
-}
-
-/*% Release the memory in resolver context ctx that was allocated to the lwres_gabnresponse_t. */
-void
-lwres_gabnresponse_free(lwres_context_t *ctx, lwres_gabnresponse_t **structp)
-{
- lwres_gabnresponse_t *gabn;
- lwres_addr_t *addr;
-
- REQUIRE(ctx != NULL);
- REQUIRE(structp != NULL && *structp != NULL);
-
- gabn = *structp;
- *structp = NULL;
-
- if (gabn->naliases > 0) {
- CTXFREE(gabn->aliases, sizeof(char *) * gabn->naliases);
- CTXFREE(gabn->aliaslen,
- sizeof(lwres_uint16_t) * gabn->naliases);
- }
- addr = LWRES_LIST_HEAD(gabn->addrs);
- while (addr != NULL) {
- LWRES_LIST_UNLINK(gabn->addrs, addr, link);
- CTXFREE(addr, sizeof(lwres_addr_t));
- addr = LWRES_LIST_HEAD(gabn->addrs);
- }
- if (gabn->base != NULL)
- CTXFREE(gabn->base, gabn->baselen);
- CTXFREE(gabn, sizeof(lwres_gabnresponse_t));
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-29 00:37:31 +0000