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556 lines
15 KiB
556 lines
15 KiB
/*
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* Copyright (C) 2001-2003 FhG Fokus
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/*! \file
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* \brief Parser :: Content part
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*
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* \ingroup parser
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "../mem/mem.h"
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#include "../dprint.h"
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#include "../str.h"
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#include "../ut.h"
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#include "parse_content.h"
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#define is_mime_char(_c_) \
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(isalpha((int)_c_) || (_c_)=='-' || (_c_)=='+' || (_c_)=='.' || (_c_)=='_')
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#define is_char_equal(_c_,_cs_) \
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( (isalpha((int)_c_)?(((_c_)|0x20)==(_cs_)):((_c_)==(_cs_)))==1 )
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/*! \brief
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* Node of the type's tree; this tree contains all the known types;
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*/
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typedef struct type_node_s {
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char c; /*!< char contained by this node */
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unsigned char final; /*!< says what mime type/subtype was detected
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*!< if string ends at this node */
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unsigned char nr_sons; /*!< the number of sub-nodes */
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int next; /*!< the next sibling node */
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}type_node_t;
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static type_node_t type_tree[] = {
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{'t',TYPE_UNKNOWN,1,4}, /* 0 */
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{'e',TYPE_UNKNOWN,1,-1},
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{'x',TYPE_UNKNOWN,1,-1},
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{'t',TYPE_TEXT,0,-1},
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{'m',TYPE_UNKNOWN,2,19}, /* 4 */
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{'e',TYPE_UNKNOWN,1,11}, /* 5 */
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{'s',TYPE_UNKNOWN,1,-1},
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{'s',TYPE_UNKNOWN,1,-1},
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{'a',TYPE_UNKNOWN,1,-1},
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{'g',TYPE_UNKNOWN,1,-1},
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{'e',TYPE_MESSAGE,0,-1},
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{'u',TYPE_UNKNOWN,1,-1}, /* 11 */
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{'l',TYPE_UNKNOWN,1,-1},
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{'t',TYPE_UNKNOWN,1,-1},
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{'i',TYPE_UNKNOWN,1,-1},
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{'p',TYPE_UNKNOWN,1,-1},
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{'a',TYPE_UNKNOWN,1,-1},
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{'r',TYPE_UNKNOWN,1,-1},
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{'t',TYPE_MULTIPART,0,-1},
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{'a',TYPE_UNKNOWN,1,-1}, /* 19 */
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{'p',TYPE_UNKNOWN,1,-1},
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{'p',TYPE_UNKNOWN,1,-1},
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{'l',TYPE_UNKNOWN,1,-1},
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{'i',TYPE_UNKNOWN,1,-1},
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{'c',TYPE_UNKNOWN,1,-1},
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{'a',TYPE_UNKNOWN,1,-1},
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{'t',TYPE_UNKNOWN,1,-1},
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{'i',TYPE_UNKNOWN,1,-1},
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{'o',TYPE_UNKNOWN,1,-1},
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{'n',TYPE_APPLICATION,0,-1},
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};
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static type_node_t subtype_tree[] = {
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{'p',SUBTYPE_UNKNOWN,2,13},
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{'l',SUBTYPE_UNKNOWN,1,5},
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{'a',SUBTYPE_UNKNOWN,1,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'n',SUBTYPE_PLAIN,0,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1}, /* 5 */
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'f',SUBTYPE_UNKNOWN,1,-1},
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{'+',TYPE_UNKNOWN,1,-1},
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{'x',TYPE_UNKNOWN,1,-1},
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{'m',TYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_PIDFXML,0,-1},
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{'l',SUBTYPE_PIDFXML,0,-1},
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{'s',SUBTYPE_UNKNOWN,1,16}, /* 13 */
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'p',SUBTYPE_SDP,0,-1},
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{'c',SUBTYPE_UNKNOWN,1,34}, /* 16 */
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{'p',SUBTYPE_UNKNOWN,2,-1},
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{'i',SUBTYPE_UNKNOWN,1,29},
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{'m',SUBTYPE_CPIM,1,-1},
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{'-',SUBTYPE_UNKNOWN,1,-1},
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{'p',SUBTYPE_UNKNOWN,1,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'f',SUBTYPE_UNKNOWN,1,-1},
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{'+',SUBTYPE_UNKNOWN,1,-1},
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{'x',SUBTYPE_UNKNOWN,1,-1},
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{'m',SUBTYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_CPIM_PIDFXML,0,-1},
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{'l',SUBTYPE_UNKNOWN,1,-1}, /* 29 */
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{'+',TYPE_UNKNOWN,1,-1},
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{'x',TYPE_UNKNOWN,1,-1},
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{'m',TYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_CPLXML,0,-1},
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{'r',SUBTYPE_UNKNOWN,2,48}, /* 34 */
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{'l',SUBTYPE_UNKNOWN,1,42},/* 35 */
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{'m',SUBTYPE_UNKNOWN,1,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'+',TYPE_UNKNOWN,1,-1},
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{'x',TYPE_UNKNOWN,1,-1},
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{'m',TYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_RLMIXML,0,-1},
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{'e',SUBTYPE_UNKNOWN,1,-1}, /* 42 */
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{'l',SUBTYPE_UNKNOWN,1,-1},
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{'a',SUBTYPE_UNKNOWN,1,-1},
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{'t',SUBTYPE_UNKNOWN,1,-1},
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{'e',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_RELATED,0,-1},
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{'l',SUBTYPE_UNKNOWN,1,57}, /* 48 */
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{'p',SUBTYPE_UNKNOWN,1,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'f',SUBTYPE_UNKNOWN,1,-1},
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{'+',SUBTYPE_UNKNOWN,1,-1},
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{'x',SUBTYPE_UNKNOWN,1,-1},
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{'m',SUBTYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_LPIDFXML,0,-1},
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{'w',SUBTYPE_UNKNOWN,1,72}, /* 57 */
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{'a',SUBTYPE_UNKNOWN,1,-1},
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{'t',SUBTYPE_UNKNOWN,1,-1},
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{'c',SUBTYPE_UNKNOWN,1,-1},
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{'h',SUBTYPE_UNKNOWN,1,-1},
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{'e',SUBTYPE_UNKNOWN,1,-1},
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{'r',SUBTYPE_UNKNOWN,1,-1},
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{'i',TYPE_UNKNOWN,1,-1},
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{'n',TYPE_UNKNOWN,1,-1},
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{'f',TYPE_UNKNOWN,1,-1},
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{'o',TYPE_UNKNOWN,1,-1},
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{'+',TYPE_UNKNOWN,1,-1},
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{'x',TYPE_UNKNOWN,1,-1},
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{'m',TYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_WATCHERINFOXML,0,-1},
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{'x',SUBTYPE_UNKNOWN,2,94}, /* 72 */
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{'p',SUBTYPE_UNKNOWN,1,81}, /* 73 */
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'f',SUBTYPE_UNKNOWN,1,-1},
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{'+',SUBTYPE_UNKNOWN,1,-1},
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{'x',SUBTYPE_UNKNOWN,1,-1},
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{'m',SUBTYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_XPIDFXML,0,-1},
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{'m',SUBTYPE_UNKNOWN,1,-1}, /* 81 */
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{'l',SUBTYPE_UNKNOWN,1,-1},
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{'+',SUBTYPE_UNKNOWN,1,-1},
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{'m',SUBTYPE_UNKNOWN,1,-1},
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{'s',SUBTYPE_UNKNOWN,1,-1},
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{'r',SUBTYPE_UNKNOWN,1,-1},
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{'t',SUBTYPE_UNKNOWN,1,-1},
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{'c',SUBTYPE_UNKNOWN,1,-1},
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{'.',SUBTYPE_UNKNOWN,1,-1},
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{'p',SUBTYPE_UNKNOWN,1,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'f',SUBTYPE_XML_MSRTC_PIDF,0,-1},
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{'e',SUBTYPE_UNKNOWN,1,107}, /* 94 */
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{'x',SUBTYPE_UNKNOWN,1,-1},
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{'t',SUBTYPE_UNKNOWN,1,-1},
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{'e',SUBTYPE_UNKNOWN,1,-1},
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{'r',SUBTYPE_UNKNOWN,1,-1},
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{'n',SUBTYPE_UNKNOWN,1,-1},
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{'a',SUBTYPE_UNKNOWN,1,-1},
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{'l',SUBTYPE_UNKNOWN,1,-1},
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{'-',SUBTYPE_UNKNOWN,1,-1},
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{'b',SUBTYPE_UNKNOWN,1,-1},
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{'o',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_UNKNOWN,1,-1},
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{'y',SUBTYPE_EXTERNAL_BODY,0,-1},
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{'m',SUBTYPE_UNKNOWN,1,112}, /* 107 */
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{'i',SUBTYPE_UNKNOWN,1,-1},
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{'x',SUBTYPE_UNKNOWN,1,-1},
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{'e',SUBTYPE_UNKNOWN,1,-1},
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{'d',SUBTYPE_MIXED,0,-1},
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{'i',SUBTYPE_UNKNOWN,1,-1}, /* 112 */
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{'s',SUBTYPE_UNKNOWN,1,-1},
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{'u',SUBTYPE_UNKNOWN,1,-1},
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{'p',SUBTYPE_ISUP,0,-1},
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};
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char* parse_content_length(char* const buffer, const char* const end, int* const length)
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{
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int number;
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char *p;
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int size;
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p = buffer;
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/* search the begining of the number */
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while ( p<end && (*p==' ' || *p=='\t' ||
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(*p=='\n' && (*(p+1)==' '||*(p+1)=='\t')) ))
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p++;
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if (p==end)
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goto error;
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/* parse the number */
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size = 0;
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number = 0;
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while (p<end && *p>='0' && *p<='9') {
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number = number*10 + (*p)-'0';
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size ++;
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p++;
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}
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if (p==end || size==0)
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goto error;
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/* now we should have only spaces at the end */
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while ( p<end && (*p==' ' || *p=='\t' ||
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(*p=='\n' && (*(p+1)==' '||*(p+1)=='\t')) ))
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p++;
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if (p==end)
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goto error;
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/* the header ends proper? */
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if ( (*(p++)!='\n') && (*(p-1)!='\r' || *(p++)!='\n' ) )
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goto error;
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*length = number;
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return p;
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error:
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LOG(L_ERR,"ERROR:parse_content_length: parse error near char [%d][%c]\n",
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*p,*p);
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return 0;
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}
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char* decode_mime_type(char* const start, const char* const end, unsigned int* const mime_type)
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{
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int node;
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char *mark;
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char *p;
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unsigned int type_candidate;
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p = start;
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/* search the begining of the type */
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while ( p<end && (*p==' ' || *p=='\t' ||
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(*p=='\n' && (*(p+1)==' '||*(p+1)=='\t')) ))
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p++;
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if (p==end)
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goto error;
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/* parse the type */
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if (*p=='*') {
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*mime_type = TYPE_ALL<<16;
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p++;
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} else {
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node = 0;
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mark = p;
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type_candidate = TYPE_UNKNOWN;
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while (p<end && is_mime_char(*p) ) {
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while ( node!=-1 && !is_char_equal(*p,type_tree[node].c) ){
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node = type_tree[node].next;
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}
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if (node!=-1) {
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type_candidate = type_tree[node].final;
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if (type_tree[node].nr_sons)
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node++;
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else
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node = -1;
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} else {
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/* end of the type tree has reached,
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but the type has still some remaining
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characters (Miklos) */
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type_candidate = TYPE_UNKNOWN;
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}
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p++;
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}
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if (p==end || mark==p)
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goto error;
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*mime_type = type_candidate<<16;
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}
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/* search the '/' separator */
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while ( p<end && (*p==' ' || *p=='\t' ||
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(*p=='\n' && (*(p+1)==' '||*(p+1)=='\t')) ))
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p++;
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if ( p==end || *(p++)!='/')
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goto error;
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/* search the begining of the sub-type */
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while ( p<end && (*p==' ' || *p=='\t' ||
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(*p=='\n' && (*(p+1)==' '||*(p+1)=='\t')) ))
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p++;
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if (p==end)
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goto error;
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/* parse the sub-type */
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if (*p=='*') {
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*mime_type |= SUBTYPE_ALL;
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p++;
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} else {
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node = 0;
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mark = p;
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type_candidate = SUBTYPE_UNKNOWN;
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while (p<end && is_mime_char(*p) ) {
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while(node!=-1 && !is_char_equal(*p,subtype_tree[node].c) )
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node = subtype_tree[node].next;
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if (node!=-1) {
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type_candidate = subtype_tree[node].final;
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if (subtype_tree[node].nr_sons)
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node++;
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else
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node = -1;
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} else {
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/* end of the subtype tree has reached,
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but the subtype has still some remaining
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characters (Miklos) */
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type_candidate = SUBTYPE_UNKNOWN;
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}
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p++;
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}
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if (p==mark)
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goto error;
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*mime_type |= type_candidate;;
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}
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/* now its possible to have some spaces */
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while ( p<end && (*p==' ' || *p=='\t' ||
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(*p=='\n' && (*(p+1)==' '||*(p+1)=='\t')) ))
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p++;
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/* if there are params, ignore them!! -> eat everything to
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* the end or to the first ',' */
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if ( p<end && *p==';' )
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for(p++; p<end && *p!=','; p++);
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/* is this the correct end? */
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if (p!=end && *p!=',' )
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goto error;
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/* check the format of the decoded mime */
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if ((*mime_type)>>16==TYPE_ALL && ((*mime_type)&0x00ff)!=SUBTYPE_ALL) {
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LOG(L_ERR,"ERROR:decode_mime_type: invalid mime format found "
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" <*/submime> in [%.*s]!!\n", (int)(end-start),start);
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return 0;
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}
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return p;
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error:
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LOG(L_ERR,"ERROR:decode_mime_type: parse error near in [%.*s] char"
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"[%d][%c] offset=%d\n", (int)(end-start),start,*p,*p,(int)(p-start));
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return 0;
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}
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/*! \brief
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* \return
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* - > 0 mime found
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* - = 0 hdr not found
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* - =-1 error */
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int parse_content_type_hdr(struct sip_msg* const msg)
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{
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char *end;
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const char *ret;
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unsigned int mime;
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/* is the header already found? */
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if ( msg->content_type==0 ) {
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/* if not, found it */
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if ( parse_headers(msg, HDR_CONTENTTYPE_F, 0)==-1)
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goto error;
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if ( msg->content_type==0 ) {
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DBG("DEBUG:parse_content_type_hdr: missing Content-Type"
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"header\n");
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return 0;
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}
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}
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/* maybe the header is already parsed! */
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if ( msg->content_type->parsed!=0)
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return get_content_type(msg);
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/* it seams we have to parse it! :-( */
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end = msg->content_type->body.s + msg->content_type->body.len;
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ret = decode_mime_type(msg->content_type->body.s, end , &mime);
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if (ret==0)
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goto error;
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if (ret!=end) {
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LOG(L_ERR,"ERROR:parse_content_type_hdr: CONTENT_TYPE hdr contains "
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"more then one mime type :-(!\n");
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goto error;
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}
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if ((mime&0x00ff)==SUBTYPE_ALL || (mime>>16)==TYPE_ALL) {
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LOG(L_ERR,"ERROR:parse_content_type_hdr: invalid mime with wildcard "
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"'*' in Content-Type hdr!\n");
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goto error;
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}
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msg->content_type->parsed = (void*)(unsigned long)mime;
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return mime;
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error:
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return -1;
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}
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int parse_accept_body(struct hdr_field* const hdr)
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{
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static unsigned int mimes[MAX_MIMES_NR];
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int nr_mimes;
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unsigned int mime;
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char *end;
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char *ret;
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if (!hdr) return -1;
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/* maybe the header is already parsed! */
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if (hdr->parsed!=0) return 1;
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/* it seams we have to parse it! :-( */
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ret = hdr->body.s;
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end = ret + hdr->body.len;
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nr_mimes = 0;
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while (1){
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ret = decode_mime_type(ret, end , &mime);
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if (ret==0)
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goto error;
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/* a new mime was found -> put it into array */
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if (nr_mimes==MAX_MIMES_NR) {
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LOG(L_ERR,"ERROR:parse_accept_hdr: Accept hdr contains more than"
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" %d mime type -> buffer overflow!!\n",MAX_MIMES_NR);
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goto error;
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}
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mimes[nr_mimes++] = mime;
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/* is another mime following? */
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if (ret==end )
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break;
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/* parse the mime separator ',' */
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if (*ret!=',' || ret+1==end) {
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LOG(L_ERR,"ERROR:parse_accept_hdr: parse error between mimes at "
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"char <%x> (offset=%d) in <%.*s>!\n",
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*ret, (int)(ret-hdr->body.s),
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hdr->body.len, hdr->body.s);
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goto error;
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}
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/* skip the ',' */
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ret++;
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}
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|
/* copy and link the mime buffer into the message */
|
|
hdr->parsed = (void*)pkg_malloc((nr_mimes+1)*sizeof(int));
|
|
if (hdr->parsed==0) {
|
|
LOG(L_ERR,"ERROR:parse_accept: no more pkg memory\n");
|
|
goto error;
|
|
}
|
|
memcpy(hdr->parsed,mimes,nr_mimes*sizeof(int));
|
|
/* make the buffer null terminated */
|
|
((int*)hdr->parsed)[nr_mimes] = 0;
|
|
|
|
return 1;
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/*! \brief
|
|
* returns: > 0 ok
|
|
* = 0 hdr not found
|
|
* = -1 error */
|
|
int parse_accept_hdr(struct sip_msg* const msg)
|
|
{
|
|
static unsigned int mimes[MAX_MIMES_NR];
|
|
int nr_mimes;
|
|
unsigned int mime;
|
|
char *end;
|
|
char *ret;
|
|
|
|
/* is the header already found? */
|
|
if ( msg->accept==0 ) {
|
|
/* if not, found it */
|
|
if ( parse_headers(msg, HDR_ACCEPT_F, 0)==-1)
|
|
goto error;
|
|
if ( msg->accept==0 ) {
|
|
DBG("DEBUG:parse_accept_hdr: missing Accept header\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* maybe the header is already parsed! */
|
|
if ( msg->accept->parsed!=0)
|
|
return 1;
|
|
|
|
/* it seams we have to parse it! :-( */
|
|
ret = msg->accept->body.s;
|
|
end = ret + msg->accept->body.len;
|
|
nr_mimes = 0;
|
|
while (1){
|
|
ret = decode_mime_type(ret, end , &mime);
|
|
if (ret==0)
|
|
goto error;
|
|
/* a new mime was found -> put it into array */
|
|
if (nr_mimes==MAX_MIMES_NR) {
|
|
LOG(L_ERR,"ERROR:parse_accept_hdr: Accept hdr contains more than"
|
|
" %d mime type -> buffer overflow!!\n",MAX_MIMES_NR);
|
|
goto error;
|
|
}
|
|
mimes[nr_mimes++] = mime;
|
|
/* is another mime following? */
|
|
if (ret==end )
|
|
break;
|
|
/* parse the mime separator ',' */
|
|
if (*ret!=',' || ret+1==end) {
|
|
LOG(L_ERR,"ERROR:parse_accept_hdr: parse error between mimes at "
|
|
"char <%x> (offset=%d) in <%.*s>!\n",
|
|
*ret, (int)(ret-msg->accept->body.s),
|
|
msg->accept->body.len, msg->accept->body.s);
|
|
goto error;
|
|
}
|
|
/* skip the ',' */
|
|
ret++;
|
|
}
|
|
|
|
/* copy and link the mime buffer into the message */
|
|
msg->accept->parsed = (void*)pkg_malloc((nr_mimes+1)*sizeof(int));
|
|
if (msg->accept->parsed==0) {
|
|
LOG(L_ERR,"ERROR:parse_accept_hdr: no more pkg memory\n");
|
|
goto error;
|
|
}
|
|
memcpy(msg->accept->parsed,mimes,nr_mimes*sizeof(int));
|
|
/* make the buffer null terminated */
|
|
((int*)msg->accept->parsed)[nr_mimes] = 0;
|
|
|
|
return 1;
|
|
error:
|
|
return -1;
|
|
}
|
|
|