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/*
* NetCosm - a MUD server
* Copyright (C) 2016 Franklin Wei
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "netcosm.h"
int telnet_handle_command(const unsigned char *buf)
{
bool cmd = false;
while(*buf)
{
unsigned char c = *buf;
const struct telnet_cmd {
int val;
const char *name;
} commands[] = {
{ IAC, "IAC" },
{ DONT, "DONT" },
{ DO, "DO" },
{ WONT, "WONT" },
{ WILL, "WILL" },
{ GA, "GA" },
{ AYT, "AYT" },
{ NOP, "NOP" },
{ SB, "SB" },
{ SE, "SE" },
{ ECHO, "ECHO" },
{ SGA, "SGA" },
{ STATUS, "STATUS" },
{ NAWS, "NAWS" }
};
for(unsigned int i = 0; i < ARRAYLEN(commands); ++i)
{
if(c == commands[i].val)
{
debugf("%s ", commands[i].name);
cmd = true;
goto found;
}
}
switch(c)
{
case IP:
return TELNET_EXIT;
default:
break;
}
debugf("???: %d ", c);
found:
++buf;
}
if(cmd)
debugf("\n");
return TELNET_OK;
}
void telnet_echo_off(void)
{
const unsigned char seq[] = {
IAC, DONT, ECHO,
IAC, WILL, ECHO,
};
out_raw(seq, ARRAYLEN(seq));
}
void telnet_echo_on(void)
{
const unsigned char seq[] = {
IAC, DO, ECHO,
IAC, WONT, ECHO,
};
out_raw(seq, ARRAYLEN(seq));
}
void telnet_init(void)
{
const unsigned char init_seq[] = {
IAC, WONT, SGA,
IAC, DONT, SGA,
IAC, WONT, NAWS,
IAC, DONT, NAWS,
IAC, WONT, STATUS,
IAC, DONT, STATUS,
IAC, DO, ECHO,
IAC, WONT, ECHO,
IAC, DONT, LINEMODE,
};
out_raw(init_seq, ARRAYLEN(init_seq));
}
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