diff options
Diffstat (limited to 'contrib/bind9/lib/lwres/lwres_gnba.c')
| -rw-r--r-- | contrib/bind9/lib/lwres/lwres_gnba.c | 415 |
1 files changed, 0 insertions, 415 deletions
diff --git a/contrib/bind9/lib/lwres/lwres_gnba.c b/contrib/bind9/lib/lwres/lwres_gnba.c deleted file mode 100644 index 7627385..0000000 --- a/contrib/bind9/lib/lwres/lwres_gnba.c +++ /dev/null @@ -1,415 +0,0 @@ -/* - * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") - * Copyright (C) 2000-2002 Internet Software Consortium. - * - * Permission to use, copy, modify, and/or 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_gnba.c,v 1.23.18.4 2007/09/26 23:46:34 tbox Exp $ */ - -/*! \file lwres_gnba.c - These are low-level routines for creating and parsing lightweight - resolver address-to-name lookup request and response messages. - - There are four main functions for the getnamebyaddr opcode. One - render function converts a getnamebyaddr request structure -- - lwres_gnbarequest_t -- to the lightweight resolver's canonical - format. It is complemented by a parse function that converts a - packet in this canonical format to a getnamebyaddr request - structure. Another render function converts the getnamebyaddr - response structure -- lwres_gnbaresponse_t to the canonical format. - This is complemented by a parse function which converts a packet in - canonical format to a getnamebyaddr response structure. - - These structures are defined in \link lwres.h <lwres/lwres.h.>\endlink They are shown - below. - -\code -#define LWRES_OPCODE_GETNAMEBYADDR 0x00010002U - -typedef struct { - lwres_uint32_t flags; - lwres_addr_t addr; -} lwres_gnbarequest_t; - -typedef struct { - lwres_uint32_t flags; - lwres_uint16_t naliases; - char *realname; - char **aliases; - lwres_uint16_t realnamelen; - lwres_uint16_t *aliaslen; - void *base; - size_t baselen; -} lwres_gnbaresponse_t; -\endcode - - lwres_gnbarequest_render() uses resolver context ctx to convert - getnamebyaddr 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_gnbaresponse_render() performs the same task, except - it converts a getnamebyaddr response structure lwres_gnbaresponse_t - to the lightweight resolver's canonical format. - - lwres_gnbarequest_parse() uses context ctx to convert the contents - of packet pkt to a lwres_gnbarequest_t structure. Buffer b provides - space to be used for storing this structure. When the function - succeeds, the resulting lwres_gnbarequest_t is made available - through *structp. lwres_gnbaresponse_parse() offers the same -semantics as lwres_gnbarequest_parse() except it yields a - lwres_gnbaresponse_t structure. - - lwres_gnbaresponse_free() and lwres_gnbarequest_free() release the - memory in resolver context ctx that was allocated to the - lwres_gnbaresponse_t or lwres_gnbarequest_t structures referenced - via structp. Any memory associated with ancillary buffers and - strings for those structures is also discarded. - -\section lwres_gbna_return Return Values - - The getnamebyaddr opcode functions lwres_gnbarequest_render(), - lwres_gnbaresponse_render() lwres_gnbarequest_parse() and - lwres_gnbaresponse_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_gnbarequest_t and lwres_gnbaresponse_t structures. - lwres_gnbarequest_parse() and lwres_gnbaresponse_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_gbna_see See Also - - \link lwpacket.c lwres_packet\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 getnamebyaddr request structure req to canonical format. */ -lwres_result_t -lwres_gnbarequest_render(lwres_context_t *ctx, lwres_gnbarequest_t *req, - lwres_lwpacket_t *pkt, lwres_buffer_t *b) -{ - unsigned char *buf; - size_t buflen; - int ret; - size_t payload_length; - - REQUIRE(ctx != NULL); - REQUIRE(req != NULL); - REQUIRE(req->addr.family != 0); - REQUIRE(req->addr.length != 0); - REQUIRE(pkt != NULL); - REQUIRE(b != NULL); - - payload_length = 4 + 4 + 2 + + req->addr.length; - - 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_GETNAMEBYADDR; - 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)); - - /* - * Put the length and the data. We know this will fit because we - * just checked for it. - */ - lwres_buffer_putuint32(b, req->flags); - lwres_buffer_putuint32(b, req->addr.family); - lwres_buffer_putuint16(b, req->addr.length); - lwres_buffer_putmem(b, (unsigned char *)req->addr.address, - req->addr.length); - - INSIST(LWRES_BUFFER_AVAILABLECOUNT(b) == 0); - - return (LWRES_R_SUCCESS); -} - -/*% Converts a getnamebyaddr response structure lwres_gnbaresponse_t to the lightweight resolver's canonical format. */ -lwres_result_t -lwres_gnbaresponse_render(lwres_context_t *ctx, lwres_gnbaresponse_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; - int x; - - REQUIRE(ctx != NULL); - REQUIRE(req != NULL); - REQUIRE(pkt != NULL); - REQUIRE(b != NULL); - - /* - * Calculate packet size. - */ - payload_length = 4; /* flags */ - payload_length += 2; /* naliases */ - payload_length += 2 + req->realnamelen + 1; /* real name encoding */ - for (x = 0; x < req->naliases; x++) /* each alias */ - payload_length += 2 + req->aliaslen[x] + 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_GETNAMEBYADDR; - 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)); - lwres_buffer_putuint32(b, req->flags); - - /* encode naliases */ - lwres_buffer_putuint16(b, req->naliases); - - /* 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); - } - - INSIST(LWRES_BUFFER_AVAILABLECOUNT(b) == 0); - - return (LWRES_R_SUCCESS); -} - -/*% Uses context ctx to convert the contents of packet pkt to a lwres_gnbarequest_t structure. */ -lwres_result_t -lwres_gnbarequest_parse(lwres_context_t *ctx, lwres_buffer_t *b, - lwres_lwpacket_t *pkt, lwres_gnbarequest_t **structp) -{ - int ret; - lwres_gnbarequest_t *gnba; - - 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)) - return (LWRES_R_UNEXPECTEDEND); - - gnba = CTXMALLOC(sizeof(lwres_gnbarequest_t)); - if (gnba == NULL) - return (LWRES_R_NOMEMORY); - - gnba->flags = lwres_buffer_getuint32(b); - - ret = lwres_addr_parse(b, &gnba->addr); - if (ret != LWRES_R_SUCCESS) - goto out; - - if (LWRES_BUFFER_REMAINING(b) != 0) { - ret = LWRES_R_TRAILINGDATA; - goto out; - } - - *structp = gnba; - return (LWRES_R_SUCCESS); - - out: - if (gnba != NULL) - lwres_gnbarequest_free(ctx, &gnba); - - return (ret); -} - -/*% Offers the same semantics as lwres_gnbarequest_parse() except it yields a lwres_gnbaresponse_t structure. */ - -lwres_result_t -lwres_gnbaresponse_parse(lwres_context_t *ctx, lwres_buffer_t *b, - lwres_lwpacket_t *pkt, lwres_gnbaresponse_t **structp) -{ - int ret; - unsigned int x; - lwres_uint32_t flags; - lwres_uint16_t naliases; - lwres_gnbaresponse_t *gnba; - - REQUIRE(ctx != NULL); - REQUIRE(pkt != NULL); - REQUIRE(b != NULL); - REQUIRE(structp != NULL && *structp == NULL); - - gnba = NULL; - - if ((pkt->pktflags & LWRES_LWPACKETFLAG_RESPONSE) == 0) - return (LWRES_R_FAILURE); - - /* - * Pull off flags & naliases - */ - if (!SPACE_REMAINING(b, 4 + 2)) - return (LWRES_R_UNEXPECTEDEND); - flags = lwres_buffer_getuint32(b); - naliases = lwres_buffer_getuint16(b); - - gnba = CTXMALLOC(sizeof(lwres_gnbaresponse_t)); - if (gnba == NULL) - return (LWRES_R_NOMEMORY); - gnba->base = NULL; - gnba->aliases = NULL; - gnba->aliaslen = NULL; - - gnba->flags = flags; - gnba->naliases = naliases; - - if (naliases > 0) { - gnba->aliases = CTXMALLOC(sizeof(char *) * naliases); - if (gnba->aliases == NULL) { - ret = LWRES_R_NOMEMORY; - goto out; - } - - gnba->aliaslen = CTXMALLOC(sizeof(lwres_uint16_t) * naliases); - if (gnba->aliaslen == NULL) { - ret = LWRES_R_NOMEMORY; - goto out; - } - } - - /* - * Now, pull off the real name. - */ - ret = lwres_string_parse(b, &gnba->realname, &gnba->realnamelen); - if (ret != LWRES_R_SUCCESS) - goto out; - - /* - * Parse off the aliases. - */ - for (x = 0; x < gnba->naliases; x++) { - ret = lwres_string_parse(b, &gnba->aliases[x], - &gnba->aliaslen[x]); - if (ret != LWRES_R_SUCCESS) - goto out; - } - - if (LWRES_BUFFER_REMAINING(b) != 0) { - ret = LWRES_R_TRAILINGDATA; - goto out; - } - - *structp = gnba; - return (LWRES_R_SUCCESS); - - out: - if (gnba != NULL) { - if (gnba->aliases != NULL) - CTXFREE(gnba->aliases, sizeof(char *) * naliases); - if (gnba->aliaslen != NULL) - CTXFREE(gnba->aliaslen, - sizeof(lwres_uint16_t) * naliases); - CTXFREE(gnba, sizeof(lwres_gnbaresponse_t)); - } - - return (ret); -} - -/*% Release the memory in resolver context ctx that was allocated to the lwres_gnbarequest_t. */ -void -lwres_gnbarequest_free(lwres_context_t *ctx, lwres_gnbarequest_t **structp) -{ - lwres_gnbarequest_t *gnba; - - REQUIRE(ctx != NULL); - REQUIRE(structp != NULL && *structp != NULL); - - gnba = *structp; - *structp = NULL; - - CTXFREE(gnba, sizeof(lwres_gnbarequest_t)); -} - -/*% Release the memory in resolver context ctx that was allocated to the lwres_gnbaresponse_t. */ -void -lwres_gnbaresponse_free(lwres_context_t *ctx, lwres_gnbaresponse_t **structp) -{ - lwres_gnbaresponse_t *gnba; - - REQUIRE(ctx != NULL); - REQUIRE(structp != NULL && *structp != NULL); - - gnba = *structp; - *structp = NULL; - - if (gnba->naliases > 0) { - CTXFREE(gnba->aliases, sizeof(char *) * gnba->naliases); - CTXFREE(gnba->aliaslen, - sizeof(lwres_uint16_t) * gnba->naliases); - } - if (gnba->base != NULL) - CTXFREE(gnba->base, gnba->baselen); - CTXFREE(gnba, sizeof(lwres_gnbaresponse_t)); -} |
