diff options
Diffstat (limited to 'resolv/ns_parse.c')
| -rw-r--r-- | resolv/ns_parse.c | 94 |
1 files changed, 53 insertions, 41 deletions
diff --git a/resolv/ns_parse.c b/resolv/ns_parse.c index d305eae535..712469be1d 100644 --- a/resolv/ns_parse.c +++ b/resolv/ns_parse.c @@ -1,18 +1,18 @@ /* + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * 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. + * 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. */ #if !defined(_LIBC) && !defined(lint) @@ -41,25 +41,30 @@ static void setsection(ns_msg *msg, ns_sect sect); /* 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). */ +const 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). */ }; +#undef ns_msg_getflag +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; @@ -83,6 +88,7 @@ ns_skiprr(const u_char *ptr, const u_char *eom, ns_sect section, int count) { RETERR(EMSGSIZE); return (ptr - optr); } +libresolv_hidden_def (ns_skiprr) int ns_initparse(const u_char *msg, int msglen, ns_msg *handle) { @@ -120,13 +126,16 @@ ns_initparse(const u_char *msg, int msglen, ns_msg *handle) { setsection(handle, ns_s_max); return (0); } +libresolv_hidden_def (ns_initparse) int ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) { int b; + int tmp; /* Make section right. */ - if (section < 0 || section >= ns_s_max) + tmp = section; + if (tmp < 0 || section >= ns_s_max) RETERR(ENODEV); if (section != handle->_sect) setsection(handle, section); @@ -139,38 +148,38 @@ ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) { if (rrnum < handle->_rrnum) setsection(handle, section); if (rrnum > handle->_rrnum) { - b = ns_skiprr(handle->_ptr, handle->_eom, section, + b = ns_skiprr(handle->_msg_ptr, handle->_eom, section, rrnum - handle->_rrnum); if (b < 0) return (-1); - handle->_ptr += b; + handle->_msg_ptr += b; handle->_rrnum = rrnum; } /* Do the parse. */ b = dn_expand(handle->_msg, handle->_eom, - handle->_ptr, rr->name, NS_MAXDNAME); + handle->_msg_ptr, rr->name, NS_MAXDNAME); if (b < 0) return (-1); - handle->_ptr += b; - if (handle->_ptr + NS_INT16SZ + NS_INT16SZ > handle->_eom) + handle->_msg_ptr += b; + if (handle->_msg_ptr + NS_INT16SZ + NS_INT16SZ > handle->_eom) RETERR(EMSGSIZE); - NS_GET16(rr->type, handle->_ptr); - NS_GET16(rr->rr_class, handle->_ptr); + 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->_ptr + NS_INT32SZ + NS_INT16SZ > handle->_eom) + if (handle->_msg_ptr + NS_INT32SZ + NS_INT16SZ > handle->_eom) RETERR(EMSGSIZE); - NS_GET32(rr->ttl, handle->_ptr); - NS_GET16(rr->rdlength, handle->_ptr); - if (handle->_ptr + rr->rdlength > handle->_eom) + 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->_ptr; - handle->_ptr += rr->rdlength; + rr->rdata = handle->_msg_ptr; + handle->_msg_ptr += rr->rdlength; } if (++handle->_rrnum > handle->_counts[(int)section]) setsection(handle, (ns_sect)((int)section + 1)); @@ -178,6 +187,7 @@ ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) { /* All done. */ return (0); } +libresolv_hidden_def (ns_parserr) /* Private. */ @@ -186,9 +196,11 @@ setsection(ns_msg *msg, ns_sect sect) { msg->_sect = sect; if (sect == ns_s_max) { msg->_rrnum = -1; - msg->_ptr = NULL; + msg->_msg_ptr = NULL; } else { msg->_rrnum = 0; - msg->_ptr = msg->_sections[(int)sect]; + msg->_msg_ptr = msg->_sections[(int)sect]; } } + +/*! \file */ |