/* process a subnegotiation buffer; return non-zero if the current buffer
* must be aborted and reprocessed due to COMPRESS2 being activated
*/
static int _subnegotiate(telnet_t *telnet)
{
telnet_event_t ev;
/* standard subnegotiation event */
ev.type = TELNET_EV_SUBNEGOTIATION;
ev.sub.telopt = telnet->sb_telopt;
ev.sub.buffer = telnet->buffer;
ev.sub.size = telnet->buffer_pos;
telnet->eh(telnet, &ev, telnet->ud);
switch (telnet->sb_telopt) {
/* specially handled subnegotiation telopt types */
case TELNET_TELOPT_ZMP:
return _zmp_telnet(telnet, telnet->buffer, telnet->buffer_pos);
case TELNET_TELOPT_TTYPE:
return _ttype_telnet(telnet, telnet->buffer, telnet->buffer_pos);
case TELNET_TELOPT_ENVIRON:
case TELNET_TELOPT_NEW_ENVIRON:
return _environ_telnet(telnet, telnet->sb_telopt, telnet->buffer,
telnet->buffer_pos);
case TELNET_TELOPT_MSSP:
return _mssp_telnet(telnet, telnet->buffer, telnet->buffer_pos);
default:
return 0;
}
}
/* process a subnegotiation buffer; return non-zero if the current buffer
* must be aborted and reprocessed due to COMPRESS2 being activated
*/
static int _subnegotiate(telnet_t *telnet) {
telnet_event_t ev;
/* standard subnegotiation event */
ev.type = TELNET_EV_SUBNEGOTIATION;
ev.sub.telopt = telnet->sb_telopt;
ev.sub.buffer = telnet->buffer;
ev.sub.size = telnet->buffer_pos;
telnet->eh(telnet, &ev, telnet->ud);
switch (telnet->sb_telopt) {
#if defined(HAVE_ZLIB)
/* received COMPRESS2 begin marker, setup our zlib box and
* start handling the compressed stream if it's not already.
*/
case TELNET_TELOPT_COMPRESS2:
if (telnet->sb_telopt == TELNET_TELOPT_COMPRESS2) {
if (_init_zlib(telnet, 0, 1) != TELNET_EOK)
return 0;
/* notify app that compression was enabled */
ev.type = TELNET_EV_COMPRESS;
ev.compress.state = 1;
telnet->eh(telnet, &ev, telnet->ud);
return 1;
}
return 0;
#endif /* defined(HAVE_ZLIB) */
/* specially handled subnegotiation telopt types */
case TELNET_TELOPT_ZMP:
return _zmp_telnet(telnet, telnet->buffer, telnet->buffer_pos);
case TELNET_TELOPT_TTYPE:
return _ttype_telnet(telnet, telnet->buffer, telnet->buffer_pos);
case TELNET_TELOPT_ENVIRON:
case TELNET_TELOPT_NEW_ENVIRON:
return _environ_telnet(telnet, telnet->sb_telopt, telnet->buffer,
telnet->buffer_pos);
case TELNET_TELOPT_MSSP:
return _mssp_telnet(telnet, telnet->buffer, telnet->buffer_pos);
default:
return 0;
}
}