15 #define RLOGIN_MAX_BACKLOG 4096
17 static Socket s = NULL;
18 static int rlogin_bufsize;
20 static void rlogin_size(void);
22 static void c_write(char *buf, int len)
24 int backlog = from_backend(0, buf, len);
25 sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
28 static int rlogin_closing(Plug plug, char *error_msg, int error_code,
36 /* A socket error has occurred. */
37 connection_fatal(error_msg);
38 } /* Otherwise, the remote side closed the connection normally. */
42 static int rlogin_receive(Plug plug, int urgent, char *data, int len)
52 * We should flush everything (aka Telnet SYNCH) if we see
53 * 0x02, and we should turn off and on _local_ flow control
54 * on 0x10 and 0x20 respectively. I'm not convinced it's
59 * Main rlogin protocol. This is really simple: the first
60 * byte is expected to be NULL and is ignored, and the rest
63 static int firstbyte = 1;
65 if (data[0] == '\0') {
77 * Called to set up the rlogin connection.
79 * Returns an error message, or NULL on success.
81 * Also places the canonical host name into `realhost'. It must be
82 * freed by the caller.
84 static char *rlogin_init(char *host, int port, char **realhost)
86 static struct plug_function_table fn_table = {
89 }, *fn_table_ptr = &fn_table;
97 addr = sk_namelookup(host, realhost);
98 if ((err = sk_addr_error(addr)))
102 port = 513; /* default rlogin port */
107 s = sk_new(addr, port, 1, 0, &fn_table_ptr);
108 if ((err = sk_socket_error(s)))
114 * Send local username, remote username, terminal/speed
121 sk_write(s, cfg.localusername, strlen(cfg.localusername));
123 sk_write(s, cfg.username, strlen(cfg.username));
125 sk_write(s, cfg.termtype, strlen(cfg.termtype));
127 for (p = cfg.termspeed; isdigit(*p); p++);
128 sk_write(s, cfg.termspeed, p - cfg.termspeed);
129 rlogin_bufsize = sk_write(s, &z, 1);
136 * Called to send data down the rlogin connection.
138 static int rlogin_send(char *buf, int len)
144 rlogin_bufsize = sk_write(s, buf, len);
146 return rlogin_bufsize;
150 * Called to query the current socket sendability status.
152 static int rlogin_sendbuffer(void)
154 return rlogin_bufsize;
158 * Called to set the size of the window
160 static void rlogin_size(void)
162 char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
168 rlogin_bufsize = sk_write(s, b, 12);
173 * Send rlogin special codes.
175 static void rlogin_special(Telnet_Special code)
181 static Socket rlogin_socket(void)
186 static int rlogin_sendok(void)
191 static void rlogin_unthrottle(int backlog)
193 sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
196 static int rlogin_ldisc(int option)
201 Backend rlogin_backend = {