Fixed parser

opentracker.c

@@ -111,7 +111,7 @@ void httpresponse(struct http_data* h,int64 s)
     ot_torrent torrent;
     ot_hash *hash = NULL;
     unsigned long numwant;
-    int compact,x;
+    int compact, scanon;
     size_t reply_size = 0;
 
     array_cat0(&h->r);
@@ -124,9 +124,7 @@ e400:
         goto bailout;
     }
 
-    // expect 'GET /uri?nnbjhg HTTP/1.*'
     c+=4;
-
     for (d=c; *d!=' '&&*d!='\t'&&*d!='\n'&&*d!='\r'; ++d) ;
 
     if (*d!=' ') goto e400;
@@ -134,7 +132,7 @@ e400:
     if (c[0]!='/') goto e404;
     while (*c=='/') ++c;
 
-    switch( x = scan_urlencoded_query( &c, data = c, SCAN_PATH ) )
+    switch( scan_urlencoded_query( &c, data = c, SCAN_PATH ) )
     {
     case 6: /* scrape ? */
       if (byte_diff(data,6,"scrape"))
@@ -147,9 +145,13 @@ e400:
       peer.port = 6881;
       numwant = 50;
       compact = 1;
+      scanon = 1;
 
-      while( 1 ) {
+      while( scanon ) {
-        switch( x=scan_urlencoded_query( &c, data = c, SCAN_SEARCHPATH_PARAM ) ) {
+        switch( scan_urlencoded_query( &c, data = c, SCAN_SEARCHPATH_PARAM ) ) {
+        case -2: /* terminator */
+          scanon = 0;
+          break;
         case -1: /* error */
           goto e404;
         case 4:
@@ -157,16 +159,22 @@ e400:
             /* scan int */  c;
           else if(!byte_diff(data,4,"left"))
             /* scan int */  c;
+          else
+            scan_urlencoded_query( &c, NULL, SCAN_SEARCHPATH_VALUE );
           break;
         case 7:
           if(!byte_diff(data,7,"numwant"))
             /* scan int */  c;
           else if(!byte_diff(data,7,"compact"))
             /* scan flag */  c;
+          else
+            scan_urlencoded_query( &c, NULL, SCAN_SEARCHPATH_VALUE );
           break;
         case 9:
-          if(byte_diff(data,9,"info_hash"))
+          if(byte_diff(data,9,"info_hash")) {
+            scan_urlencoded_query( &c, NULL, SCAN_SEARCHPATH_VALUE );
             continue;
+          }
           /* ignore this, when we have less than 20 bytes */
           switch( scan_urlencoded_query( &c, data = c, SCAN_SEARCHPATH_VALUE ) ) {
           case -1:
@@ -178,13 +186,14 @@ e400:
             continue;
           }
         default:
-          printf("blub %i\n",x);
+          scan_urlencoded_query( &c, NULL, SCAN_SEARCHPATH_VALUE );
           break;
         }
       }
 
       /* Scanned whole query string */
       if( !hash || ( compact == 0 ) ) goto e404;
+      printf("ALLFINE\n");
       torrent = add_peer_to_torrent( hash, &peer );
       if( !torrent ) {
 e500:
@@ -194,18 +203,16 @@ e500:
       reply = malloc( numwant*6+10 );
       if( reply )
         reply_size = return_peers_for_torrent( torrent, numwant, reply );
-      if( !reply || reply_size < 0 ) {
+      if( !reply || ( reply_size < 0 ) ) {
         if( reply ) free( reply );
         goto e500;
       }
       break;
     default: /* neither scrape nor announce */
-          printf("blub %i\n",x);
 e404:
       httperror(h,"404 Not Found","No such file or directory.");
       goto bailout;
     }
-
     c=h->hdrbuf=(char*)malloc(500);
     c+=fmt_str(c,"HTTP/1.1 Coming Up\r\nContent-Type: text/plain");
     c+=fmt_str(c,"\r\nContent-Length: ");

scan_urlencoded_query.c

@@ -24,21 +24,23 @@ size_t scan_urlencoded_query(char **string, char *deststring, int flags) {
       if( ( b = scan_fromhex(*s++) ) == 0xff ) return -1;
       c=(c<<4)|b;
     }
-    *d++ = c;
+    if(d) *d++ = c;
   }
 
   switch( c ) {
   case 0: case '\r': case '\n': case ' ':
-    if ( ( flags & BREAK_AT_WHITESPACE ) == 0 ) return -1;
+    if( d == (unsigned char*)deststring ) return -2;
+    --s;
     break;
   case '?':
-    if ( ( flags & BREAK_AT_QUESTIONMARK ) == 0 ) return -1;
+    if( flags != SCAN_PATH ) return -1;
     break;
   case '=':
-    if ( ( flags & BREAK_AT_EQUALSIGN ) == 0 ) return -1;
+    if( flags != SCAN_SEARCHPATH_PARAM ) return -1;
     break;
   case '&':
-    if ( ( flags & BREAK_AT_AMPERSAND ) == 0 ) return -1;
+    if( flags == SCAN_PATH ) return -1;
+    if( flags == SCAN_SEARCHPATH_PARAM ) --s;
     break;
   default:
     return -1;

scan_urlencoded_query.h

@@ -1,14 +1,9 @@
-#ifndef  __SCAN_URLENCODED_QUERY_H__
+#ifndef __SCAN_URLENCODED_QUERY_H__
 #define __SCAN_URLENCODED_QUERY_H__
 
-#define BREAK_AT_QUESTIONMARK (1<<0)
+#define SCAN_PATH             0
-#define BREAK_AT_WHITESPACE   (1<<1)
+#define SCAN_SEARCHPATH_PARAM 1
-#define BREAK_AT_AMPERSAND    (1<<2)
+#define SCAN_SEARCHPATH_VALUE 2
-#define BREAK_AT_EQUALSIGN    (1<<3)
-
-#define SCAN_PATH             ( BREAK_AT_QUESTIONMARK | BREAK_AT_WHITESPACE )
-#define SCAN_SEARCHPATH_PARAM ( BREAK_AT_EQUALSIGN )
-#define SCAN_SEARCHPATH_VALUE ( BREAK_AT_AMPERSAND | BREAK_AT_WHITESPACE )
 
 // string     pointer to source, pointer to after terminator on return
 // deststring pointer to destination

trackerlogic.c

@@ -227,6 +227,7 @@ void *map_file( char *file_name ) {
   char *map;
   if( file_name ) {
     int file_desc=open(file_name,O_RDWR|O_CREAT|O_NDELAY,0644);
+printf( "%s\n", file_name );
     if( file_desc < 0) return 0;
     lseek( file_desc, OT_HUGE_FILESIZE, SEEK_SET );
     write( file_desc, "_", 1 );
@@ -263,8 +264,6 @@ int init_logic( char *directory ) {
   torrents_list    = map_file( NULL );
   torrents_count   = 0;
 
-  printf( "%08x  %08x\n", scratch_space, torrents_list );
-
   if( !scratch_space || !torrents_list ) {
     if( scratch_space || torrents_list )
       unmap_file( NULL, scratch_space ? (void*)scratch_space : (void*)torrents_list, 0 );