mirror of git://erdgeist.org/opentracker
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
|
|
It is considered beerware. Prost. Skol. Cheers or whatever. */
|
|
|
|
#include "scan.h"
|
|
#include "scan_urlencoded_query.h"
|
|
|
|
/* Idea is to do a in place replacement or guarantee at least
|
|
strlen( string ) bytes in deststring
|
|
watch http://www.ietf.org/rfc/rfc2396.txt
|
|
unreserved = alphanum | mark
|
|
mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
|
|
we add '%' to the matrix to not stop at encoded chars.
|
|
After losing too many requests to being too strict, add the following characters to reserved matrix
|
|
relax = "+" | "," | "/" | ";" | "<" | ">" | ":"
|
|
*/
|
|
|
|
static const unsigned char is_unreserved[256] = {
|
|
8,0,0,0,0,0,0,0,0,0,8,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
8,7,8,8,8,7,0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,4,7,6,
|
|
4,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,7,
|
|
8,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,7,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
|
|
};
|
|
|
|
static unsigned char fromhex(unsigned char x) {
|
|
x-='0'; if( x<=9) return x;
|
|
x&=~0x20; x-='A'-'0';
|
|
if( x<6 ) return x+10;
|
|
return 0xff;
|
|
}
|
|
|
|
void scan_urlencoded_skipvalue( char **string ) {
|
|
const unsigned char* s=*(const unsigned char**) string;
|
|
unsigned char f;
|
|
|
|
while( ( f = is_unreserved[ *s++ ] ) & SCAN_SEARCHPATH_VALUE );
|
|
if( f & SCAN_SEARCHPATH_TERMINATOR ) --s;
|
|
*string = (char*)s;
|
|
}
|
|
|
|
ssize_t scan_urlencoded_query(char **string, char *deststring, SCAN_SEARCHPATH_FLAG flags) {
|
|
const unsigned char* s=*(const unsigned char**) string;
|
|
unsigned char *d = (unsigned char*)deststring;
|
|
unsigned char b, c, f;
|
|
|
|
while( ( f = is_unreserved[ c = *s++ ] ) & flags ) {
|
|
if( c=='%') {
|
|
if( ( b = fromhex(*s++) ) == 0xff ) return -1;
|
|
if( ( c = fromhex(*s++) ) == 0xff ) return -1;
|
|
c|=(b<<4);
|
|
}
|
|
*d++ = c;
|
|
}
|
|
|
|
switch( c ) {
|
|
case 0: case '\r': case '\n': case ' ':
|
|
if( d == (unsigned char*)deststring ) return -2;
|
|
--s;
|
|
break;
|
|
case '?':
|
|
break;
|
|
case '=':
|
|
if( flags != SCAN_SEARCHPATH_PARAM ) return -1;
|
|
break;
|
|
case '&':
|
|
if( flags == SCAN_PATH ) return -1;
|
|
if( flags == SCAN_SEARCHPATH_PARAM ) --s;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
*string = (char *)s;
|
|
return d - (unsigned char*)deststring;
|
|
}
|
|
|
|
ssize_t scan_fixed_int( char *data, size_t len, int *tmp ) {
|
|
int minus = 0;
|
|
*tmp = 0;
|
|
if( *data == '-' ) --len, ++data, ++minus;
|
|
while( (len > 0) && (*data >= '0') && (*data <= '9') ) { --len; *tmp = 10**tmp + *data++-'0'; }
|
|
if( minus ) *tmp = -*tmp;
|
|
return len;
|
|
}
|
|
|
|
ssize_t scan_fixed_ip( char *data, size_t len, unsigned char ip[4] ) {
|
|
int u, i;
|
|
|
|
for( i=0; i<4; ++i ) {
|
|
ssize_t j = scan_fixed_int( data, len, &u );
|
|
if( j == (ssize_t)len ) return len;
|
|
ip[i] = u;
|
|
data += len - j;
|
|
len = j;
|
|
if ( i<3 ) {
|
|
if( !len || *data != '.') return -1;
|
|
--len; ++data;
|
|
}
|
|
}
|
|
return len;
|
|
}
|