#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "putty.h"
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#define RLOGIN_MAX_BACKLOG 4096
static Socket s = NULL;
static int rlogin_bufsize;
static void rlogin_size(void);
static void c_write(char *buf, int len)
{
int backlog = from_backend(0, buf, len);
sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
}
static int rlogin_closing(Plug plug, char *error_msg, int error_code,
int calling_back)
{
if (s) {
sk_close(s);
s = NULL;
}
if (error_msg) {
/* A socket error has occurred. */
connection_fatal(error_msg);
} /* Otherwise, the remote side closed the connection normally. */
return 0;
}
static int rlogin_receive(Plug plug, int urgent, char *data, int len)
{
if (urgent == 2) {
char c;
c = *data++;
len--;
if (c == '\x80')
rlogin_size();
/*
* We should flush everything (aka Telnet SYNCH) if we see
* 0x02, and we should turn off and on _local_ flow control
* on 0x10 and 0x20 respectively. I'm not convinced it's
* worth it...
*/
} else {
/*
* Main rlogin protocol. This is really simple: the first
* byte is expected to be NULL and is ignored, and the rest
* is printed.
*/
static int firstbyte = 1;
if (firstbyte) {
if (data[0] == '\0') {
data++;
len--;
}
firstbyte = 0;
}
if (len > 0)
c_write(data, len);
}
return 1;
}
static void rlogin_sent(Plug plug, int bufsize)
{
rlogin_bufsize = bufsize;
}
/*
* Called to set up the rlogin connection.
*
* Returns an error message, or NULL on success.
*
* Also places the canonical host name into `realhost'. It must be
* freed by the caller.
*/
static char *rlogin_init(char *host, int port, char **realhost, int nodelay)
{
static struct plug_function_table fn_table = {
rlogin_closing,
rlogin_receive,
rlogin_sent
}, *fn_table_ptr = &fn_table;
SockAddr addr;
char *err;
/*
* Try to find host.
*/
{
char buf[200];
sprintf(buf, "Looking up host \"%.170s\"", host);
logevent(buf);
}
addr = sk_namelookup(host, realhost);
if ((err = sk_addr_error(addr)))
return err;
if (port < 0)
port = 513; /* default rlogin port */
/*
* Open socket.
*/
{
char buf[200], addrbuf[100];
sk_getaddr(addr, addrbuf, 100);
sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
logevent(buf);
}
s = new_connection(addr, *realhost, port, 1, 0, nodelay, &fn_table_ptr);
if ((err = sk_socket_error(s)))
return err;
sk_addr_free(addr);
/*
* Send local username, remote username, terminal/speed
*/
{
char z = 0;
char *p;
sk_write(s, &z, 1);
sk_write(s, cfg.localusername, strlen(cfg.localusername));
sk_write(s, &z, 1);
sk_write(s, cfg.username, strlen(cfg.username));
sk_write(s, &z, 1);
sk_write(s, cfg.termtype, strlen(cfg.termtype));
sk_write(s, "/", 1);
for (p = cfg.termspeed; isdigit(*p); p++);
sk_write(s, cfg.termspeed, p - cfg.termspeed);
rlogin_bufsize = sk_write(s, &z, 1);
}
return NULL;
}
/*
* Called to send data down the rlogin connection.
*/
static int rlogin_send(char *buf, int len)
{
if (s == NULL)
return 0;
rlogin_bufsize = sk_write(s, buf, len);
return rlogin_bufsize;
}
/*
* Called to query the current socket sendability status.
*/
static int rlogin_sendbuffer(void)
{
return rlogin_bufsize;
}
/*
* Called to set the size of the window
*/
static void rlogin_size(void)
{
char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
if (s == NULL)
return;
b[6] = cols >> 8;
b[7] = cols & 0xFF;
b[4] = rows >> 8;
b[5] = rows & 0xFF;
rlogin_bufsize = sk_write(s, b, 12);
return;
}
/*
* Send rlogin special codes.
*/
static void rlogin_special(Telnet_Special code)
{
/* Do nothing! */
return;
}
static Socket rlogin_socket(void)
{
return s;
}
static int rlogin_sendok(void)
{
return 1;
}
static void rlogin_unthrottle(int backlog)
{
sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
}
static int rlogin_ldisc(int option)
{
return 0;
}
static int rlogin_exitcode(void)
{
/* If we ever implement RSH, we'll probably need to do this properly */
return 0;
}
Backend rlogin_backend = {
rlogin_init,
rlogin_send,
rlogin_sendbuffer,
rlogin_size,
rlogin_special,
rlogin_socket,
rlogin_exitcode,
rlogin_sendok,
rlogin_ldisc,
rlogin_unthrottle,
1
};