16 #define RLOGIN_MAX_BACKLOG 4096
18 static Socket s = NULL;
19 static int rlogin_bufsize;
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;
112 sprintf(buf, "Looking up host \"%.170s\"", host);
115 addr = sk_namelookup(host, realhost);
116 if ((err = sk_addr_error(addr)))
120 port = 513; /* default rlogin port */
126 char buf[200], addrbuf[100];
127 sk_getaddr(addr, addrbuf, 100);
128 sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
131 s = new_connection(addr, *realhost, port, 1, 0, nodelay, &fn_table_ptr);
132 if ((err = sk_socket_error(s)))
138 * Send local username, remote username, terminal/speed
145 sk_write(s, cfg.localusername, strlen(cfg.localusername));
147 sk_write(s, cfg.username, strlen(cfg.username));
149 sk_write(s, cfg.termtype, strlen(cfg.termtype));
151 for (p = cfg.termspeed; isdigit(*p); p++);
152 sk_write(s, cfg.termspeed, p - cfg.termspeed);
153 rlogin_bufsize = sk_write(s, &z, 1);
160 * Called to send data down the rlogin connection.
162 static int rlogin_send(char *buf, int len)
167 rlogin_bufsize = sk_write(s, buf, len);
169 return rlogin_bufsize;
173 * Called to query the current socket sendability status.
175 static int rlogin_sendbuffer(void)
177 return rlogin_bufsize;
181 * Called to set the size of the window
183 static void rlogin_size(void)
185 char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
187 if (s == NULL || term == NULL)
190 b[6] = term->cols >> 8;
191 b[7] = term->cols & 0xFF;
192 b[4] = term->rows >> 8;
193 b[5] = term->rows & 0xFF;
194 rlogin_bufsize = sk_write(s, b, 12);
199 * Send rlogin special codes.
201 static void rlogin_special(Telnet_Special code)
207 static Socket rlogin_socket(void)
212 static int rlogin_sendok(void)
217 static void rlogin_unthrottle(int backlog)
219 sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
222 static int rlogin_ldisc(int option)
227 static int rlogin_exitcode(void)
229 /* If we ever implement RSH, we'll probably need to do this properly */
233 Backend rlogin_backend = {