diff options
Diffstat (limited to 'contrib/bind/lib/nameser/ns_parse.c')
| -rw-r--r-- | contrib/bind/lib/nameser/ns_parse.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/contrib/bind/lib/nameser/ns_parse.c b/contrib/bind/lib/nameser/ns_parse.c deleted file mode 100644 index abd48f2..0000000 --- a/contrib/bind/lib/nameser/ns_parse.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * Copyright (c) 1996,1999 by 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. - */ - -#ifndef lint -static const char rcsid[] = "$Id: ns_parse.c,v 8.18 2003/04/03 06:10:10 marka Exp $"; -#endif - -/* Import. */ - -#include "port_before.h" - -#include <sys/types.h> - -#include <netinet/in.h> -#include <arpa/nameser.h> - -#include <errno.h> -#include <resolv.h> -#include <string.h> - -#include "port_after.h" - -/* Forward. */ - -static void setsection(ns_msg *msg, ns_sect sect); - -/* Macros. */ - -#define RETERR(err) do { errno = (err); return (-1); } while (0) - -/* Public. */ - -/* These need to be in the same order as the nres.h:ns_flag enum. */ -struct _ns_flagdata _ns_flagdata[16] = { - { 0x8000, 15 }, /* qr. */ - { 0x7800, 11 }, /* opcode. */ - { 0x0400, 10 }, /* aa. */ - { 0x0200, 9 }, /* tc. */ - { 0x0100, 8 }, /* rd. */ - { 0x0080, 7 }, /* ra. */ - { 0x0040, 6 }, /* z. */ - { 0x0020, 5 }, /* ad. */ - { 0x0010, 4 }, /* cd. */ - { 0x000f, 0 }, /* rcode. */ - { 0x0000, 0 }, /* expansion (1/6). */ - { 0x0000, 0 }, /* expansion (2/6). */ - { 0x0000, 0 }, /* expansion (3/6). */ - { 0x0000, 0 }, /* expansion (4/6). */ - { 0x0000, 0 }, /* expansion (5/6). */ - { 0x0000, 0 }, /* expansion (6/6). */ -}; - -int ns_msg_getflag(ns_msg handle, int flag) { - return(((handle)._flags & _ns_flagdata[flag].mask) >> _ns_flagdata[flag].shift); -} - -int -ns_skiprr(const u_char *ptr, const u_char *eom, ns_sect section, int count) { - const u_char *optr = ptr; - - for ((void)NULL; count > 0; count--) { - int b, rdlength; - - b = dn_skipname(ptr, eom); - if (b < 0) - RETERR(EMSGSIZE); - ptr += b/*Name*/ + NS_INT16SZ/*Type*/ + NS_INT16SZ/*Class*/; - if (section != ns_s_qd) { - if (ptr + NS_INT32SZ + NS_INT16SZ > eom) - RETERR(EMSGSIZE); - ptr += NS_INT32SZ/*TTL*/; - NS_GET16(rdlength, ptr); - ptr += rdlength/*RData*/; - } - } - if (ptr > eom) - RETERR(EMSGSIZE); - return (ptr - optr); -} - -int -ns_initparse(const u_char *msg, int msglen, ns_msg *handle) { - const u_char *eom = msg + msglen; - int i; - - memset(handle, 0x5e, sizeof *handle); - handle->_msg = msg; - handle->_eom = eom; - if (msg + NS_INT16SZ > eom) - RETERR(EMSGSIZE); - NS_GET16(handle->_id, msg); - if (msg + NS_INT16SZ > eom) - RETERR(EMSGSIZE); - NS_GET16(handle->_flags, msg); - for (i = 0; i < ns_s_max; i++) { - if (msg + NS_INT16SZ > eom) - RETERR(EMSGSIZE); - NS_GET16(handle->_counts[i], msg); - } - for (i = 0; i < ns_s_max; i++) - if (handle->_counts[i] == 0) - handle->_sections[i] = NULL; - else { - int b = ns_skiprr(msg, eom, (ns_sect)i, - handle->_counts[i]); - - if (b < 0) - return (-1); - handle->_sections[i] = msg; - msg += b; - } - if (msg != eom) - RETERR(EMSGSIZE); - setsection(handle, ns_s_max); - return (0); -} - -int -ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) { - int b; - int tmp; - - /* Make section right. */ - if ((tmp = section) < 0 || section >= ns_s_max) - RETERR(ENODEV); - if (section != handle->_sect) - setsection(handle, section); - - /* Make rrnum right. */ - if (rrnum == -1) - rrnum = handle->_rrnum; - if (rrnum < 0 || rrnum >= handle->_counts[(int)section]) - RETERR(ENODEV); - if (rrnum < handle->_rrnum) - setsection(handle, section); - if (rrnum > handle->_rrnum) { - b = ns_skiprr(handle->_msg_ptr, handle->_eom, section, - rrnum - handle->_rrnum); - - if (b < 0) - return (-1); - handle->_msg_ptr += b; - handle->_rrnum = rrnum; - } - - /* Do the parse. */ - b = dn_expand(handle->_msg, handle->_eom, - handle->_msg_ptr, rr->name, NS_MAXDNAME); - if (b < 0) - return (-1); - handle->_msg_ptr += b; - if (handle->_msg_ptr + NS_INT16SZ + NS_INT16SZ > handle->_eom) - RETERR(EMSGSIZE); - NS_GET16(rr->type, handle->_msg_ptr); - NS_GET16(rr->rr_class, handle->_msg_ptr); - if (section == ns_s_qd) { - rr->ttl = 0; - rr->rdlength = 0; - rr->rdata = NULL; - } else { - if (handle->_msg_ptr + NS_INT32SZ + NS_INT16SZ > handle->_eom) - RETERR(EMSGSIZE); - NS_GET32(rr->ttl, handle->_msg_ptr); - NS_GET16(rr->rdlength, handle->_msg_ptr); - if (handle->_msg_ptr + rr->rdlength > handle->_eom) - RETERR(EMSGSIZE); - rr->rdata = handle->_msg_ptr; - handle->_msg_ptr += rr->rdlength; - } - if (++handle->_rrnum > handle->_counts[(int)section]) - setsection(handle, (ns_sect)((int)section + 1)); - - /* All done. */ - return (0); -} - -/* Private. */ - -static void -setsection(ns_msg *msg, ns_sect sect) { - msg->_sect = sect; - if (sect == ns_s_max) { - msg->_rrnum = -1; - msg->_msg_ptr = NULL; - } else { - msg->_rrnum = 0; - msg->_msg_ptr = msg->_sections[(int)sect]; - } -} |
