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/*-
* Copyright 2012 Matthew Endsley
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted providing 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.
*/
#include "header.h"
static unsigned char http_header_state[] = {
/* * \t \n \r ' ' , : PAD */
0x80, 1, 0xC1, 0xC1, 1, 0x80, 0x80, 0xC1, /* state 0: HTTP version */
0x81, 2, 0xC1, 0xC1, 2, 1, 1, 0xC1, /* state 1: Response code */
0x82, 0x82, 4, 3, 0x82, 0x82, 0x82, 0xC1, /* state 2: Response reason */
0xC1, 0xC1, 4, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 3: HTTP version newline */
0x84, 0xC1, 0xC0, 5, 0xC1, 0xC1, 6, 0xC1, /* state 4: Start of header field */
0xC1, 0xC1, 0xC0, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 5: Last CR before end of header */
0x87, 6, 0xC1, 0xC1, 6, 0x87, 0x87, 0xC1, /* state 6: leading whitespace before header value */
0x87, 0x87, 0xC4, 10, 0x87, 0x88, 0x87, 0xC1, /* state 7: header field value */
0x87, 0x88, 6, 9, 0x88, 0x88, 0x87, 0xC1, /* state 8: Split value field value */
0xC1, 0xC1, 6, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 9: CR after split value field */
0xC1, 0xC1, 0xC4, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 10:CR after header value */
};
int http_parse_header_char(int* state, char ch)
{
int newstate, code = 0;
switch (ch) {
case '\t': code = 1; break;
case '\n': code = 2; break;
case '\r': code = 3; break;
case ' ': code = 4; break;
case ',': code = 5; break;
case ':': code = 6; break;
}
newstate = http_header_state[*state * 8 + code];
*state = (newstate & 0xF);
switch (newstate) {
case 0xC0: return http_header_status_done;
case 0xC1: return http_header_status_done;
case 0xC4: return http_header_status_store_keyvalue;
case 0x80: return http_header_status_version_character;
case 0x81: return http_header_status_code_character;
case 0x82: return http_header_status_status_character;
case 0x84: return http_header_status_key_character;
case 0x87: return http_header_status_value_character;
case 0x88: return http_header_status_value_character;
}
return http_header_status_continue;
}
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