/* ** JNetLib ** Copyright (C) 2000-2007 Nullsoft, Inc. ** Author: Justin Frankel ** File: httpget.cpp - JNL HTTP GET implementation ** License: see jnetlib.h */ #include "netinc.h" #include "util.h" #include "wac_network_http_receiver.h" #ifdef USE_SSL #include "wac_network_ssl_connection.h" #endif #include #pragma intrinsic(memcpy) #include "../nu/strsafe.h" #include "nu/AutoLock.h" #include "..\WAT\WAT.h" char *wa::Components::WAC_Network_HTTPGet::g_proxy = 0; static nu::LockGuard proxy_guard; char *wa::Components::WAC_Network_HTTPGet::get_proxy() { nu::AutoLock auto_lock( proxy_guard ); if ( g_proxy ) return _strdup( g_proxy ); else return 0; } void wa::Components::WAC_Network_HTTPGet::set_proxy( const char *p_proxy ) { nu::AutoLock auto_lock( proxy_guard ); free( g_proxy ); if ( p_proxy ) g_proxy = _strdup( p_proxy ); else g_proxy = 0; } wa::Components::WAC_Network_HTTPGet::WAC_Network_HTTPGet( api_dns *p_dns, size_t p_recvbufsize, const char *p_proxy ) { JNL::open_socketlib(); reinit(); open( p_dns, p_recvbufsize, p_proxy ); } wa::Components::WAC_Network_HTTPGet::~WAC_Network_HTTPGet() { deinit(); free( m_sendheaders ); free( m_http_proxylpinfo ); free( m_http_proxyhost ); } void wa::Components::WAC_Network_HTTPGet::open( api_dns *p_dns, size_t p_recvbufsize, const char *p_proxy ) { m_recvbufsize = p_recvbufsize; if ( p_dns != API_DNS_AUTODNS ) m_dns = p_dns; if ( p_proxy ) { char *p = _strdup( p_proxy ); if ( p ) { char *r = NULL; do_parse_url( p, &m_http_proxyhost, &m_http_proxyport, &r, &m_http_proxylpinfo ); free( r ); free( p ); } } } void wa::Components::WAC_Network_HTTPGet::reinit() { m_errstr = 0; m_recvheaders = NULL; m_recvheaders_size = 0; m_http_state = 0; m_http_port = 0; m_http_url = 0; m_reply = 0; m_http_host = NULL; m_http_lpinfo = NULL; m_http_request = NULL; m_http_content_type = NULL; } void wa::Components::WAC_Network_HTTPGet::deinit( bool p_full ) { if ( !persistent || p_full || ( m_con && m_con->get_state() == WAC_Network_Connection::STATE_ERROR ) ) { delete m_con; m_con = NULL; } free( m_recvheaders ); free( m_http_url ); free( m_http_host ); free( m_http_lpinfo ); free( m_http_request ); if ( m_http_content_type ) free( m_http_content_type ); free( m_errstr ); free( m_reply ); if ( zlibStream ) inflateEnd( zlibStream ); free( zlibStream ); zlibStream = 0; reinit(); } void wa::Components::WAC_Network_HTTPGet::set_sendbufsize( size_t p_sendbufsize ) { m_sendbufsize = p_sendbufsize; } int wa::Components::WAC_Network_HTTPGet::set_recv_buffer_size( size_t p_new_buffer_size ) { if ( m_con ) { int ret = m_con->set_recv_buffer_size( p_new_buffer_size ); if ( ret == NErr_NoAction )// this will get returned if new_buffer_size is smaller than existing. return NErr_Success; else if ( ret != NErr_Success ) return ret; } m_recvbufsize = p_new_buffer_size; return NErr_Success; } void wa::Components::WAC_Network_HTTPGet::addheader( const char *header ) { if ( strstr( header, "\r" ) || strstr( header, "\n" ) ) return; if ( !m_sendheaders ) { size_t len = strlen( header ) + 3; m_sendheaders = (char *)malloc( len ); if ( m_sendheaders ) { char *itr = m_sendheaders; StringCchCopyExA( itr, len, header, &itr, &len, 0 ); StringCchCatExA( itr, len, "\r\n", &itr, &len, 0 ); } } else { size_t len = strlen( header ) + strlen( m_sendheaders ) + 1 + 2; char *t = (char *)malloc( len ); if ( t ) { char *newHeaders = t; StringCchCopyExA( t, len, m_sendheaders, &t, &len, 0 ); StringCchCatExA( t, len, header, &t, &len, 0 ); StringCchCatExA( t, len, "\r\n", &t, &len, 0 ); free( m_sendheaders ); m_sendheaders = newHeaders; } } } void wa::Components::WAC_Network_HTTPGet::addheadervalue( const char *header, const char *value ) { size_t additional = strlen( header ) + 2 + strlen( value ) + 2 + 1; if ( !m_sendheaders ) { m_sendheaders = (char *)malloc( additional ); if ( m_sendheaders ) { char *p = m_sendheaders; StringCchCopyExA( p, additional, header, &p, &additional, 0 ); StringCchCatExA( p, additional, ": ", &p, &additional, 0 ); StringCchCatExA( p, additional, value, &p, &additional, 0 ); StringCchCatExA( p, additional, "\r\n", &p, &additional, 0 ); } } else { size_t alloc_len = strlen( m_sendheaders ) + additional; char *t = (char *)malloc( alloc_len ); if ( t ) { char *p = t; StringCchCopyExA( p, alloc_len, m_sendheaders, &p, &alloc_len, 0 ); StringCchCatExA( p, alloc_len, header, &p, &alloc_len, 0 ); StringCchCatExA( p, alloc_len, ": ", &p, &alloc_len, 0 ); StringCchCatExA( p, alloc_len, value, &p, &alloc_len, 0 ); StringCchCatExA( p, alloc_len, "\r\n", &p, &alloc_len, 0 ); free( m_sendheaders ); m_sendheaders = t; } } } void wa::Components::WAC_Network_HTTPGet::do_encode_mimestr( char *in, char *out ) { char alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; int shift = 0; int accum = 0; while ( in && *in ) { if ( *in ) { accum <<= 8; shift += 8; accum |= *in++; } while ( shift >= 6 ) { shift -= 6; *out++ = alphabet[ ( accum >> shift ) & 0x3F ]; } } if ( shift == 4 ) { *out++ = alphabet[ ( accum & 0xF ) << 2 ]; *out++ = '='; } else if ( shift == 2 ) { *out++ = alphabet[ ( accum & 0x3 ) << 4 ]; *out++ = '='; *out++ = '='; } *out++ = 0; } void wa::Components::WAC_Network_HTTPGet::connect( const char *url, int ver, const char *requestmethod ) { deinit( false ); m_http_url = _strdup( url ); do_parse_url( m_http_url, &m_http_host, &m_http_port, &m_http_request, &m_http_lpinfo ); if ( !m_http_host || !m_http_host[ 0 ] || !m_http_port ) { m_http_state = -1; seterrstr( "invalid URL" ); return; } size_t sendbufferlen = 0; if ( !m_http_proxyhost || !m_http_proxyhost[ 0 ] ) sendbufferlen += strlen( requestmethod ) + 1 /* GET */ + strlen( m_http_request ) + 9 /* HTTP/1.0 */ + 2; else { sendbufferlen += strlen( requestmethod ) + 1 /* GET */ + strlen( m_http_url ) + 9 /* HTTP/1.0 */ + 2; if ( m_http_proxylpinfo && m_http_proxylpinfo[ 0 ] ) sendbufferlen += 58 + strlen( m_http_proxylpinfo ) * 2; // being safe here } sendbufferlen += 5 /* Host: */ + strlen( m_http_host ) + 2; if ( m_http_port != 80 ) sendbufferlen += 6; if ( m_http_lpinfo && m_http_lpinfo[ 0 ] ) sendbufferlen += 46 + strlen( m_http_lpinfo ) * 2; // being safe here if ( m_sendheaders ) sendbufferlen += strlen( m_sendheaders ); size_t strLen = sendbufferlen + 1024; char *str = (char *)calloc( strLen, sizeof( char ) ); char *connectString = str; if ( !str ) { seterrstr( "error allocating memory" ); m_http_state = -1; } if ( !m_http_proxyhost || !m_http_proxyhost[ 0 ] ) { StringCchPrintfExA( str, strLen, &str, &strLen, 0, "%s %s HTTP/1.%d\r\n", requestmethod, m_http_request, ver % 10 ); } else { char *myp = NULL; if ( strncasecmp( m_http_url, "uvox://", 7 ) == 0 ) { myp = m_http_url + 7; StringCchPrintfExA( str, strLen, &str, &strLen, 0, "%s http: //%s HTTP/1.%d\r\n", requestmethod, myp, ver % 10 ); } else if ( strncasecmp( m_http_url, "unsv://", 7 ) == 0 ) { myp = m_http_url + 7; StringCchPrintfExA( str, strLen, &str, &strLen, 0, "%s http: //%s HTTP/1.%d\r\n", requestmethod, myp, ver % 10 ); } else if ( strncasecmp( m_http_url, "uasf://", 7 ) == 0 ) { myp = m_http_url + 7; StringCchPrintfExA( str, strLen, &str, &strLen, 0, "%s http: //%s HTTP/1.%d\r\n", requestmethod, myp, ver % 10 ); } else StringCchPrintfExA( str, strLen, &str, &strLen, 0, "%s %s HTTP/1.%d\r\n", requestmethod, m_http_url, ver % 10 ); } if ( ver % 10 == 1 ) StringCchPrintfExA( str, strLen, &str, &strLen, 0, "Connection: close\r\n" ); if ( m_http_port == 80 ) StringCchPrintfExA( str, strLen, &str, &strLen, 0, "Host: %s\r\n", m_http_host ); else StringCchPrintfExA( str, strLen, &str, &strLen, 0, "Host: %s:%d\r\n", m_http_host, m_http_port ); if ( m_http_lpinfo && m_http_lpinfo[ 0 ] ) { StringCchCatExA( str, strLen, "Authorization: Basic ", &str, &strLen, 0 ); do_encode_mimestr( m_http_lpinfo, str ); StringCchCatExA( str, strLen, "\r\n", &str, &strLen, 0 ); } if ( m_http_proxylpinfo && m_http_proxylpinfo[ 0 ] ) { StringCchCatExA( str, strLen, "Proxy-Authorization: Basic ", &str, &strLen, 0 ); do_encode_mimestr( m_http_proxylpinfo, str ); StringCchCatExA( str, strLen, "\r\n", &str, &strLen, 0 ); } if ( allowCompression ) StringCchCatExA( str, strLen, "Accept-Encoding: compress, gzip\r\n", &str, &strLen, 0 ); if ( m_sendheaders ) StringCchCatExA( str, strLen, m_sendheaders, &str, &strLen, 0 ); StringCchCatExA( str, strLen, "\r\n", &str, &strLen, 0 ); int a = (int)m_recvbufsize; if ( a < 4096 ) a = 4096; if ( !m_con ) { //m_con=new WAC_Network_Connection(m_dns,strlen(str)+4,a); /* ** Joshua Teitelbaum delta 1/15/2006 */ #ifdef USE_SSL /* ** Joshua Teitelbaum 1/27/2006 ** Check for secure */ if ( !_strnicmp( m_http_url, "https:", strlen( "https:" ) ) ) { size_t send_buffer_size = strlen( connectString ) + 4; if ( send_buffer_size < 8192 ) send_buffer_size = 8192; send_buffer_size += m_sendbufsize; if ( m_sendbufsize == 0 && !strcmp( requestmethod, "POST" ) ) send_buffer_size += 8192; // some extra room for posting data if it wasn't explicitly defined m_con = new JNL_SSL_Connection( NULL, m_dns, send_buffer_size, a ); } else { #endif size_t send_buffer_size = strlen( connectString ) + 4 + m_sendbufsize; if ( m_sendbufsize == 0 && !strcmp( requestmethod, "POST" ) ) send_buffer_size += 8192; // some extra room for posting data if it wasn't explicitly defined m_con = new WAC_Network_Connection( m_dns, send_buffer_size, a ); #ifdef USE_SSL } #endif if ( m_con ) { if ( !m_http_proxyhost || !m_http_proxyhost[ 0 ] ) m_con->connect( m_http_host, m_http_port ); else m_con->connect( m_http_proxyhost, m_http_proxyport ); m_con->send_string( connectString ); } else { m_http_state = -1; seterrstr( "could not create connection object" ); } } else { m_con->reuse(); m_con->send_string( connectString ); } free( connectString ); } void wa::Components::WAC_Network_HTTPGet::do_parse_url( const char *url, char **host, unsigned short *port, char **req, char **lp ) { char *l_port = 0; JNL::parse_url( url, &l_port, host, port, req, lp ); if ( !*port ) { if ( l_port ) { addrinfo *res; addrinfo hints; memset( &hints, 0, sizeof( hints ) ); hints.ai_family = PF_UNSPEC; hints.ai_flags = 0; hints.ai_socktype = SOCK_STREAM; if ( getaddrinfo( 0, l_port, &hints, &res ) == 0 ) { if ( res->ai_family == AF_INET ) *port = htons( ( (sockaddr_in *)res->ai_addr )->sin_port ); else if ( res->ai_family == AF_INET6 ) *port = htons( ( (sockaddr_in6 *)res->ai_addr )->sin6_port ); else // wtf? *port = 80; } else *port = 80; } else *port = 80; } if ( l_port ) free( l_port ); if ( !*req ) *req = _strdup( "/" ); } const char *wa::Components::WAC_Network_HTTPGet::getallheaders() { // double null terminated, null delimited list if ( m_recvheaders ) return m_recvheaders; else return "\0\0"; } char *wa::Components::WAC_Network_HTTPGet::getheader( const char *headername ) { char *ret = NULL; if ( headername[ 0 ] == 0 || !m_recvheaders ) return NULL; size_t headername_size = strlen( headername ); char *buf = (char *)malloc( headername_size + 2 ); #ifdef _WIN32 StringCchCopyA( buf, headername_size + 2, headername ); #elif defined(__APPLE__) strlcpy( buf, headername, headername_size + 2 ); #else strncpy( buf, headername, headername_size + 1 ); buf[ headername_size + 1 ] = 0; #endif if ( buf[ headername_size - 1 ] != ':' ) { buf[ headername_size++ ] = ':'; buf[ headername_size ] = 0; } char *p = m_recvheaders; while ( p && *p ) { if ( !strncasecmp( buf, p, headername_size ) ) { ret = p + headername_size; while ( ret && *ret && *ret == ' ' ) ret++; break; } p += strlen( p ) + 1; } free( buf ); return ret; } int wa::Components::WAC_Network_HTTPGet::run() { int cnt = 0; if ( m_http_state == -1 || !m_con ) return HTTPRECEIVER_RUN_ERROR; // error run_again: m_con->run(); if ( m_con->get_state() == WAC_Network_Connection::STATE_ERROR ) { seterrstr( m_con->get_errstr() ); return HTTPRECEIVER_RUN_ERROR; } if ( m_con->get_state() == WAC_Network_Connection::STATE_CLOSED ) return HTTPRECEIVER_RUN_CONNECTION_CLOSED; if ( m_http_state == 0 ) // connected, waiting for reply { if ( m_con->recv_lines_available() > 0 ) { char buf[ 4096 ] = { 0 }; m_con->recv_line( buf, 4096 ); buf[ 4095 ] = 0; if ( m_reply && getreplycode() == 100 ) { free( m_reply ); m_reply = 0; goto run_again; } m_reply = _strdup( buf ); int code = getreplycode(); if ( code >= 200 && code <= 206 ) m_http_state = 2; // proceed to read headers normally else if ( code == 301 || code == 302 || code == 303 || code == 307 ) { m_http_state = 1; // redirect city } else if ( code != 100 ) // in case of HTTP 100 Continue code, we'll keep looping { if ( accept_all_reply_codes ) { m_http_state = 2; // proceed to read headers normally } else { seterrstr( buf ); m_http_state = -1; return HTTPRECEIVER_RUN_ERROR; } } cnt = 0; } else if ( !cnt++ ) goto run_again; } if ( m_http_state == 1 ) // redirect { char *loc = 0; while ( m_con->recv_lines_available() > 0 ) { char buf[ 4096 ] = { 0 }; m_con->recv_line( buf, 4096 ); buf[ 4095 ] = 0; if ( !buf[ 0 ] ) { if ( !loc ) { m_http_state = -1; return HTTPRECEIVER_RUN_ERROR; } else break; } if ( !strncasecmp( buf, "Location:", 9 ) ) { char *p = buf + 9; while ( p && *p && *p == ' ' ) p++; if ( p && *p ) { // TODO need to make this match the request type loc = _strdup( p ); } } } if ( loc ) { connect( loc, 1 ); free( loc ); return HTTPRECEIVER_RUN_OK; } } /* ----- read headers ----- */ if ( m_http_state == 2 ) { if ( !cnt++ && m_con->recv_lines_available() < 1 ) goto run_again; while ( m_con->recv_lines_available() > 0 ) { char buf[ 8192 ] = { 0 }; m_con->recv_line( buf, 8192 ); buf[ 8191 ] = 0; if ( !buf[ 0 ] ) { const char *compression = getheader( "Content-Encoding" ); if ( compression && !strcmp( compression, "gzip" ) ) { zlibStream = (z_stream *)malloc( sizeof( z_stream ) ); zlibStream->next_in = Z_NULL; zlibStream->avail_in = Z_NULL; zlibStream->next_out = Z_NULL; zlibStream->avail_out = Z_NULL; zlibStream->zalloc = (alloc_func)0; zlibStream->zfree = (free_func)0; zlibStream->opaque = 0; int z_err = inflateInit2( zlibStream, 15 + 16 /* +16 for gzip */ ); if ( z_err != Z_OK ) { free( zlibStream ); zlibStream = 0; } } else { if ( zlibStream ) { free( zlibStream ); zlibStream = 0; } } m_http_state = 3; break; } if ( !m_recvheaders ) { m_recvheaders_size = strlen( buf ) + 1; if ( m_recvheaders_size == 0 || m_recvheaders_size == (size_t)-1 ) // check for overflow { m_http_state = -1; return HTTPRECEIVER_RUN_ERROR; } m_recvheaders = (char *)malloc( m_recvheaders_size + 1 ); if ( m_recvheaders ) { strcpy( m_recvheaders, buf ); // safe because we malloc'd specifically above m_recvheaders[ m_recvheaders_size ] = 0; } else { m_http_state = -1; return HTTPRECEIVER_RUN_ERROR; } } else { size_t oldsize = m_recvheaders_size; m_recvheaders_size += strlen( buf ) + 1; if ( m_recvheaders_size + 1 < oldsize ) // check for overflow { m_http_state = -1; return HTTPRECEIVER_RUN_ERROR; } char *n = (char *)realloc( m_recvheaders, m_recvheaders_size + 1 ); if ( !n ) { m_http_state = -1; return HTTPRECEIVER_RUN_ERROR; } strcpy( n + oldsize, buf ); // safe because we malloc specifially for the size n[ m_recvheaders_size ] = 0; // double null terminate m_recvheaders = n; } } } return HTTPRECEIVER_RUN_OK; } int wa::Components::WAC_Network_HTTPGet::get_status() // returns 0 if connecting, 1 if reading headers, 2 if reading content, -1 if error. { if ( m_http_state < 0 ) return HTTPRECEIVER_STATUS_ERROR; if ( m_http_state < 2 ) return HTTPRECEIVER_STATUS_CONNECTING; if ( m_http_state == 2 ) return HTTPRECEIVER_STATUS_READING_HEADERS; if ( m_http_state == 3 ) return HTTPRECEIVER_STATUS_READING_CONTENT; return HTTPRECEIVER_STATUS_ERROR; } int wa::Components::WAC_Network_HTTPGet::getreplycode() // returns 0 if none yet, otherwise returns http reply code. { if ( !m_reply ) return 0; char *p = m_reply; while ( p && *p && *p != ' ' ) p++; // skip over HTTP/x.x if ( !p || !*p ) return 0; return atoi( ++p ); } size_t wa::Components::WAC_Network_HTTPGet::bytes_available() { if ( m_con && m_http_state == 3 ) return m_con->recv_bytes_available(); return 0; } size_t wa::Components::WAC_Network_HTTPGet::get_bytes( char *buf, size_t len ) { if ( m_con && m_http_state == 3 ) { if ( zlibStream ) { // TODO: benski> we need to pick a better buffer size // either alloca() and use the passed in length // or malloc a buffer based on the constructor-initted buffer size char temp[ 8192 ] = { 0 }; int size = (int)m_con->peek_bytes( temp, 8192 ); if ( size ) { zlibStream->next_in = reinterpret_cast( temp ); zlibStream->avail_in = (uInt)size; zlibStream->next_out = reinterpret_cast( buf ); zlibStream->avail_out = (uInt)len; int zlib_err = inflate( zlibStream, Z_SYNC_FLUSH ); if ( zlib_err == Z_OK || zlib_err == Z_STREAM_END ) { m_con->recv_bytes( 0, size - zlibStream->avail_in ); // since we only peeked above return len - zlibStream->avail_out; } else return 0; // TODO: should we do something else here? } } else return m_con->recv_bytes( buf, len ); } return 0; } size_t wa::Components::WAC_Network_HTTPGet::peek_bytes( char *buf, size_t len ) { if ( m_con && m_http_state == 3 ) { if ( zlibStream ) return 0; // TODO: benski> how are we going to do peek_bytes, since the inflater saves state? else return m_con->peek_bytes( buf, len ); } return 0; } uint64_t wa::Components::WAC_Network_HTTPGet::content_length() { const char *p = getheader( "Content-Length" ); if ( p && *p ) return strtoull( p, 0, 10 ); else { // TODO need to check this further for reliability! // Helps to handle responses without content-length if ( m_recvheaders_size > 0 && bytes_available() > 0 ) return bytes_available() - m_recvheaders_size; } return 0; } void wa::Components::WAC_Network_HTTPGet::seterrstr( const char *str ) { if ( m_errstr ) free( m_errstr ); m_errstr = _strdup( str ); } void wa::Components::WAC_Network_HTTPGet::AllowCompression() { allowCompression = true; } void wa::Components::WAC_Network_HTTPGet::reset_headers() { if ( m_sendheaders ) { free( m_sendheaders ); m_sendheaders = 0; } } void wa::Components::WAC_Network_HTTPGet::set_accept_all_reply_codes() { accept_all_reply_codes = true; } void wa::Components::WAC_Network_HTTPGet::set_persistent() { persistent = true; } size_t wa::Components::WAC_Network_HTTPGet::AddRef() { return this->_reference_count.fetch_add( 1 ); } size_t wa::Components::WAC_Network_HTTPGet::Release() { std::size_t l_reference_count = this->_reference_count.fetch_sub( 1 ); if ( l_reference_count == 0 ) delete this; return l_reference_count; } #ifdef CBCLASS #undef CBCLASS #endif #define CBCLASS wa::Components::WAC_Network_HTTPGet START_DISPATCH; CB( ADDREF, AddRef ) CB( RELEASE, Release ) VCB( API_HTTPRECEIVER_OPEN, open ) VCB( API_HTTPRECEIVER_ADDHEADER, addheader ) VCB( API_HTTPRECEIVER_ADDHEADERVALUE, addheadervalue ) VCB( API_HTTPRECEIVER_CONNECT, connect ) CB( API_HTTPRECEIVER_RUN, run ) CB( API_HTTPRECEIVER_GETSTATUS, get_status ) CB( API_HTTPRECEIVER_GETBYTESAVAILABLE, bytes_available ) CB( API_HTTPRECEIVER_GETBYTES, get_bytes ) CB( API_HTTPRECEIVER_PEEKBYTES, peek_bytes ) CB( API_HTTPRECEIVER_GETHEADER, getheader ) CB( API_HTTPRECEIVER_GETCONTENTLENGTH, content_length ) CB( API_HTTPRECEIVER_GETALLHEADERS, getallheaders ) CB( API_HTTPRECEIVER_GETREPLYCODE, getreplycode ) CB( API_HTTPRECEIVER_GETREPLY, getreply ) CB( API_HTTPRECEIVER_GETERROR, geterrorstr ) CB( API_HTTPRECEIVER_GETCONNECTION, get_con ) VCB( API_HTTPRECEIVER_ALLOW_COMPRESSION, AllowCompression ) VCB( API_HTTPRECEIVER_RESET_HEADERS, reset_headers ) CB( API_HTTPRECEIVER_GET_URL, get_url ) VCB( API_HTTPRECEIVER_SET_SENDBUFSIZE, set_sendbufsize ) VCB( API_HTTPRECEIVER_SET_ACCEPT_ALL_REPLY_CODES, set_accept_all_reply_codes ) VCB( API_HTTPRECEIVER_SET_PERSISTENT, set_persistent ) END_DISPATCH; #undef CBCLASS