15 #define RLOGIN_MAX_BACKLOG 4096
17 static Socket s
= NULL
;
18 static int rlogin_bufsize
;
19 static int rlogin_term_width
, rlogin_term_height
;
20 static void *frontend
;
22 static void rlogin_size(void);
24 static void c_write(char *buf
, int len
)
26 int backlog
= from_backend(frontend
, 0, buf
, len
);
27 sk_set_frozen(s
, backlog
> RLOGIN_MAX_BACKLOG
);
30 static int rlogin_closing(Plug plug
, char *error_msg
, int error_code
,
38 /* A socket error has occurred. */
40 connection_fatal("%s", error_msg
);
41 } /* Otherwise, the remote side closed the connection normally. */
45 static int rlogin_receive(Plug plug
, int urgent
, char *data
, int len
)
55 * We should flush everything (aka Telnet SYNCH) if we see
56 * 0x02, and we should turn off and on _local_ flow control
57 * on 0x10 and 0x20 respectively. I'm not convinced it's
62 * Main rlogin protocol. This is really simple: the first
63 * byte is expected to be NULL and is ignored, and the rest
66 static int firstbyte
= 1;
68 if (data
[0] == '\0') {
80 static void rlogin_sent(Plug plug
, int bufsize
)
82 rlogin_bufsize
= bufsize
;
86 * Called to set up the rlogin connection.
88 * Returns an error message, or NULL on success.
90 * Also places the canonical host name into `realhost'. It must be
91 * freed by the caller.
93 static char *rlogin_init(void *frontend_handle
,
94 char *host
, int port
, char **realhost
, int nodelay
)
96 static struct plug_function_table fn_table
= {
100 }, *fn_table_ptr
= &fn_table
;
105 frontend
= frontend_handle
;
106 rlogin_term_width
= cfg
.width
;
107 rlogin_term_height
= cfg
.height
;
114 sprintf(buf
, "Looking up host \"%.170s\"", host
);
117 addr
= sk_namelookup(host
, realhost
);
118 if ((err
= sk_addr_error(addr
)))
122 port
= 513; /* default rlogin port */
128 char buf
[200], addrbuf
[100];
129 sk_getaddr(addr
, addrbuf
, 100);
130 sprintf(buf
, "Connecting to %.100s port %d", addrbuf
, port
);
133 s
= new_connection(addr
, *realhost
, port
, 1, 0, nodelay
, &fn_table_ptr
);
134 if ((err
= sk_socket_error(s
)))
140 * Send local username, remote username, terminal/speed
147 sk_write(s
, cfg
.localusername
, strlen(cfg
.localusername
));
149 sk_write(s
, cfg
.username
, strlen(cfg
.username
));
151 sk_write(s
, cfg
.termtype
, strlen(cfg
.termtype
));
153 for (p
= cfg
.termspeed
; isdigit(*p
); p
++);
154 sk_write(s
, cfg
.termspeed
, p
- cfg
.termspeed
);
155 rlogin_bufsize
= sk_write(s
, &z
, 1);
162 * Called to send data down the rlogin connection.
164 static int rlogin_send(char *buf
, int len
)
169 rlogin_bufsize
= sk_write(s
, buf
, len
);
171 return rlogin_bufsize
;
175 * Called to query the current socket sendability status.
177 static int rlogin_sendbuffer(void)
179 return rlogin_bufsize
;
183 * Called to set the size of the window
185 static void rlogin_size(int width
, int height
)
187 char b
[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
189 rlogin_term_width
= width
;
190 rlogin_term_height
= height
;
195 b
[6] = rlogin_term_width
>> 8;
196 b
[7] = rlogin_term_width
& 0xFF;
197 b
[4] = rlogin_term_height
>> 8;
198 b
[5] = rlogin_term_height
& 0xFF;
199 rlogin_bufsize
= sk_write(s
, b
, 12);
204 * Send rlogin special codes.
206 static void rlogin_special(Telnet_Special code
)
212 static Socket
rlogin_socket(void)
217 static int rlogin_sendok(void)
222 static void rlogin_unthrottle(int backlog
)
224 sk_set_frozen(s
, backlog
> RLOGIN_MAX_BACKLOG
);
227 static int rlogin_ldisc(int option
)
232 static int rlogin_exitcode(void)
234 /* If we ever implement RSH, we'll probably need to do this properly */
238 Backend rlogin_backend
= {