diff options
Diffstat (limited to 'crypto/openssh/openbsd-compat/getrrsetbyname.c')
| -rw-r--r-- | crypto/openssh/openbsd-compat/getrrsetbyname.c | 612 |
1 files changed, 0 insertions, 612 deletions
diff --git a/crypto/openssh/openbsd-compat/getrrsetbyname.c b/crypto/openssh/openbsd-compat/getrrsetbyname.c deleted file mode 100644 index 6c86e02..0000000 --- a/crypto/openssh/openbsd-compat/getrrsetbyname.c +++ /dev/null @@ -1,612 +0,0 @@ -/* $OpenBSD: getrrsetbyname.c,v 1.10 2005/03/30 02:58:28 tedu Exp $ */ - -/* - * Copyright (c) 2001 Jakob Schlyter. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Portions Copyright (c) 1999-2001 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 INTERNET SOFTWARE CONSORTIUM - * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL - * INTERNET SOFTWARE CONSORTIUM 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. - */ - -/* OPENBSD ORIGINAL: lib/libc/net/getrrsetbyname.c */ - -#include "includes.h" - -#ifndef HAVE_GETRRSETBYNAME - -#include <stdlib.h> -#include <string.h> - -#include <netinet/in.h> -#include <arpa/inet.h> - -#include "getrrsetbyname.h" - -#if defined(HAVE_DECL_H_ERRNO) && !HAVE_DECL_H_ERRNO -extern int h_errno; -#endif - -/* We don't need multithread support here */ -#ifdef _THREAD_PRIVATE -# undef _THREAD_PRIVATE -#endif -#define _THREAD_PRIVATE(a,b,c) (c) - -/* to avoid conflicts where a platform already has _res */ -#ifdef _res -# undef _res -#endif -#define _res _compat_res - -struct __res_state _res; - -/* Necessary functions and macros */ - -/* - * Inline versions of get/put short/long. Pointer is advanced. - * - * These macros demonstrate the property of C whereby it can be - * portable or it can be elegant but rarely both. - */ - -#ifndef INT32SZ -# define INT32SZ 4 -#endif -#ifndef INT16SZ -# define INT16SZ 2 -#endif - -#ifndef GETSHORT -#define GETSHORT(s, cp) { \ - register u_char *t_cp = (u_char *)(cp); \ - (s) = ((u_int16_t)t_cp[0] << 8) \ - | ((u_int16_t)t_cp[1]) \ - ; \ - (cp) += INT16SZ; \ -} -#endif - -#ifndef GETLONG -#define GETLONG(l, cp) { \ - register u_char *t_cp = (u_char *)(cp); \ - (l) = ((u_int32_t)t_cp[0] << 24) \ - | ((u_int32_t)t_cp[1] << 16) \ - | ((u_int32_t)t_cp[2] << 8) \ - | ((u_int32_t)t_cp[3]) \ - ; \ - (cp) += INT32SZ; \ -} -#endif - -/* - * Routines to insert/extract short/long's. - */ - -#ifndef HAVE__GETSHORT -static u_int16_t -_getshort(msgp) - register const u_char *msgp; -{ - register u_int16_t u; - - GETSHORT(u, msgp); - return (u); -} -#elif defined(HAVE_DECL__GETSHORT) && (HAVE_DECL__GETSHORT == 0) -u_int16_t _getshort(register const u_char *); -#endif - -#ifndef HAVE__GETLONG -static u_int32_t -_getlong(msgp) - register const u_char *msgp; -{ - register u_int32_t u; - - GETLONG(u, msgp); - return (u); -} -#elif defined(HAVE_DECL__GETLONG) && (HAVE_DECL__GETLONG == 0) -u_int32_t _getlong(register const u_char *); -#endif - -/* ************** */ - -#define ANSWER_BUFFER_SIZE 1024*64 - -struct dns_query { - char *name; - u_int16_t type; - u_int16_t class; - struct dns_query *next; -}; - -struct dns_rr { - char *name; - u_int16_t type; - u_int16_t class; - u_int16_t ttl; - u_int16_t size; - void *rdata; - struct dns_rr *next; -}; - -struct dns_response { - HEADER header; - struct dns_query *query; - struct dns_rr *answer; - struct dns_rr *authority; - struct dns_rr *additional; -}; - -static struct dns_response *parse_dns_response(const u_char *, int); -static struct dns_query *parse_dns_qsection(const u_char *, int, - const u_char **, int); -static struct dns_rr *parse_dns_rrsection(const u_char *, int, const u_char **, - int); - -static void free_dns_query(struct dns_query *); -static void free_dns_rr(struct dns_rr *); -static void free_dns_response(struct dns_response *); - -static int count_dns_rr(struct dns_rr *, u_int16_t, u_int16_t); - -int -getrrsetbyname(const char *hostname, unsigned int rdclass, - unsigned int rdtype, unsigned int flags, - struct rrsetinfo **res) -{ - struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res); - int result; - struct rrsetinfo *rrset = NULL; - struct dns_response *response = NULL; - struct dns_rr *rr; - struct rdatainfo *rdata; - int length; - unsigned int index_ans, index_sig; - u_char answer[ANSWER_BUFFER_SIZE]; - - /* check for invalid class and type */ - if (rdclass > 0xffff || rdtype > 0xffff) { - result = ERRSET_INVAL; - goto fail; - } - - /* don't allow queries of class or type ANY */ - if (rdclass == 0xff || rdtype == 0xff) { - result = ERRSET_INVAL; - goto fail; - } - - /* don't allow flags yet, unimplemented */ - if (flags) { - result = ERRSET_INVAL; - goto fail; - } - - /* initialize resolver */ - if ((_resp->options & RES_INIT) == 0 && res_init() == -1) { - result = ERRSET_FAIL; - goto fail; - } - -#ifdef DEBUG - _resp->options |= RES_DEBUG; -#endif /* DEBUG */ - -#ifdef RES_USE_DNSSEC - /* turn on DNSSEC if EDNS0 is configured */ - if (_resp->options & RES_USE_EDNS0) - _resp->options |= RES_USE_DNSSEC; -#endif /* RES_USE_DNSEC */ - - /* make query */ - length = res_query(hostname, (signed int) rdclass, (signed int) rdtype, - answer, sizeof(answer)); - if (length < 0) { - switch(h_errno) { - case HOST_NOT_FOUND: - result = ERRSET_NONAME; - goto fail; - case NO_DATA: - result = ERRSET_NODATA; - goto fail; - default: - result = ERRSET_FAIL; - goto fail; - } - } - - /* parse result */ - response = parse_dns_response(answer, length); - if (response == NULL) { - result = ERRSET_FAIL; - goto fail; - } - - if (response->header.qdcount != 1) { - result = ERRSET_FAIL; - goto fail; - } - - /* initialize rrset */ - rrset = calloc(1, sizeof(struct rrsetinfo)); - if (rrset == NULL) { - result = ERRSET_NOMEMORY; - goto fail; - } - rrset->rri_rdclass = response->query->class; - rrset->rri_rdtype = response->query->type; - rrset->rri_ttl = response->answer->ttl; - rrset->rri_nrdatas = response->header.ancount; - -#ifdef HAVE_HEADER_AD - /* check for authenticated data */ - if (response->header.ad == 1) - rrset->rri_flags |= RRSET_VALIDATED; -#endif - - /* copy name from answer section */ - rrset->rri_name = strdup(response->answer->name); - if (rrset->rri_name == NULL) { - result = ERRSET_NOMEMORY; - goto fail; - } - - /* count answers */ - rrset->rri_nrdatas = count_dns_rr(response->answer, rrset->rri_rdclass, - rrset->rri_rdtype); - rrset->rri_nsigs = count_dns_rr(response->answer, rrset->rri_rdclass, - T_SIG); - - /* allocate memory for answers */ - rrset->rri_rdatas = calloc(rrset->rri_nrdatas, - sizeof(struct rdatainfo)); - if (rrset->rri_rdatas == NULL) { - result = ERRSET_NOMEMORY; - goto fail; - } - - /* allocate memory for signatures */ - rrset->rri_sigs = calloc(rrset->rri_nsigs, sizeof(struct rdatainfo)); - if (rrset->rri_sigs == NULL) { - result = ERRSET_NOMEMORY; - goto fail; - } - - /* copy answers & signatures */ - for (rr = response->answer, index_ans = 0, index_sig = 0; - rr; rr = rr->next) { - - rdata = NULL; - - if (rr->class == rrset->rri_rdclass && - rr->type == rrset->rri_rdtype) - rdata = &rrset->rri_rdatas[index_ans++]; - - if (rr->class == rrset->rri_rdclass && - rr->type == T_SIG) - rdata = &rrset->rri_sigs[index_sig++]; - - if (rdata) { - rdata->rdi_length = rr->size; - rdata->rdi_data = malloc(rr->size); - - if (rdata->rdi_data == NULL) { - result = ERRSET_NOMEMORY; - goto fail; - } - memcpy(rdata->rdi_data, rr->rdata, rr->size); - } - } - free_dns_response(response); - - *res = rrset; - return (ERRSET_SUCCESS); - -fail: - if (rrset != NULL) - freerrset(rrset); - if (response != NULL) - free_dns_response(response); - return (result); -} - -void -freerrset(struct rrsetinfo *rrset) -{ - u_int16_t i; - - if (rrset == NULL) - return; - - if (rrset->rri_rdatas) { - for (i = 0; i < rrset->rri_nrdatas; i++) { - if (rrset->rri_rdatas[i].rdi_data == NULL) - break; - free(rrset->rri_rdatas[i].rdi_data); - } - free(rrset->rri_rdatas); - } - - if (rrset->rri_sigs) { - for (i = 0; i < rrset->rri_nsigs; i++) { - if (rrset->rri_sigs[i].rdi_data == NULL) - break; - free(rrset->rri_sigs[i].rdi_data); - } - free(rrset->rri_sigs); - } - - if (rrset->rri_name) - free(rrset->rri_name); - free(rrset); -} - -/* - * DNS response parsing routines - */ -static struct dns_response * -parse_dns_response(const u_char *answer, int size) -{ - struct dns_response *resp; - const u_char *cp; - - /* allocate memory for the response */ - resp = calloc(1, sizeof(*resp)); - if (resp == NULL) - return (NULL); - - /* initialize current pointer */ - cp = answer; - - /* copy header */ - memcpy(&resp->header, cp, HFIXEDSZ); - cp += HFIXEDSZ; - - /* fix header byte order */ - resp->header.qdcount = ntohs(resp->header.qdcount); - resp->header.ancount = ntohs(resp->header.ancount); - resp->header.nscount = ntohs(resp->header.nscount); - resp->header.arcount = ntohs(resp->header.arcount); - - /* there must be at least one query */ - if (resp->header.qdcount < 1) { - free_dns_response(resp); - return (NULL); - } - - /* parse query section */ - resp->query = parse_dns_qsection(answer, size, &cp, - resp->header.qdcount); - if (resp->header.qdcount && resp->query == NULL) { - free_dns_response(resp); - return (NULL); - } - - /* parse answer section */ - resp->answer = parse_dns_rrsection(answer, size, &cp, - resp->header.ancount); - if (resp->header.ancount && resp->answer == NULL) { - free_dns_response(resp); - return (NULL); - } - - /* parse authority section */ - resp->authority = parse_dns_rrsection(answer, size, &cp, - resp->header.nscount); - if (resp->header.nscount && resp->authority == NULL) { - free_dns_response(resp); - return (NULL); - } - - /* parse additional section */ - resp->additional = parse_dns_rrsection(answer, size, &cp, - resp->header.arcount); - if (resp->header.arcount && resp->additional == NULL) { - free_dns_response(resp); - return (NULL); - } - - return (resp); -} - -static struct dns_query * -parse_dns_qsection(const u_char *answer, int size, const u_char **cp, int count) -{ - struct dns_query *head, *curr, *prev; - int i, length; - char name[MAXDNAME]; - - for (i = 1, head = NULL, prev = NULL; i <= count; i++, prev = curr) { - - /* allocate and initialize struct */ - curr = calloc(1, sizeof(struct dns_query)); - if (curr == NULL) { - free_dns_query(head); - return (NULL); - } - if (head == NULL) - head = curr; - if (prev != NULL) - prev->next = curr; - - /* name */ - length = dn_expand(answer, answer + size, *cp, name, - sizeof(name)); - if (length < 0) { - free_dns_query(head); - return (NULL); - } - curr->name = strdup(name); - if (curr->name == NULL) { - free_dns_query(head); - return (NULL); - } - *cp += length; - - /* type */ - curr->type = _getshort(*cp); - *cp += INT16SZ; - - /* class */ - curr->class = _getshort(*cp); - *cp += INT16SZ; - } - - return (head); -} - -static struct dns_rr * -parse_dns_rrsection(const u_char *answer, int size, const u_char **cp, - int count) -{ - struct dns_rr *head, *curr, *prev; - int i, length; - char name[MAXDNAME]; - - for (i = 1, head = NULL, prev = NULL; i <= count; i++, prev = curr) { - - /* allocate and initialize struct */ - curr = calloc(1, sizeof(struct dns_rr)); - if (curr == NULL) { - free_dns_rr(head); - return (NULL); - } - if (head == NULL) - head = curr; - if (prev != NULL) - prev->next = curr; - - /* name */ - length = dn_expand(answer, answer + size, *cp, name, - sizeof(name)); - if (length < 0) { - free_dns_rr(head); - return (NULL); - } - curr->name = strdup(name); - if (curr->name == NULL) { - free_dns_rr(head); - return (NULL); - } - *cp += length; - - /* type */ - curr->type = _getshort(*cp); - *cp += INT16SZ; - - /* class */ - curr->class = _getshort(*cp); - *cp += INT16SZ; - - /* ttl */ - curr->ttl = _getlong(*cp); - *cp += INT32SZ; - - /* rdata size */ - curr->size = _getshort(*cp); - *cp += INT16SZ; - - /* rdata itself */ - curr->rdata = malloc(curr->size); - if (curr->rdata == NULL) { - free_dns_rr(head); - return (NULL); - } - memcpy(curr->rdata, *cp, curr->size); - *cp += curr->size; - } - - return (head); -} - -static void -free_dns_query(struct dns_query *p) -{ - if (p == NULL) - return; - - if (p->name) - free(p->name); - free_dns_query(p->next); - free(p); -} - -static void -free_dns_rr(struct dns_rr *p) -{ - if (p == NULL) - return; - - if (p->name) - free(p->name); - if (p->rdata) - free(p->rdata); - free_dns_rr(p->next); - free(p); -} - -static void -free_dns_response(struct dns_response *p) -{ - if (p == NULL) - return; - - free_dns_query(p->query); - free_dns_rr(p->answer); - free_dns_rr(p->authority); - free_dns_rr(p->additional); - free(p); -} - -static int -count_dns_rr(struct dns_rr *p, u_int16_t class, u_int16_t type) -{ - int n = 0; - - while(p) { - if (p->class == class && p->type == type) - n++; - p = p->next; - } - - return (n); -} - -#endif /* !defined(HAVE_GETRRSETBYNAME) */ |
