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 static void rlogin_sent(Plug plug, int bufsize)
79 rlogin_bufsize = bufsize;
83 * Called to set up the rlogin connection.
85 * Returns an error message, or NULL on success.
87 * Also places the canonical host name into `realhost'. It must be
88 * freed by the caller.
90 static char *rlogin_init(char *host, int port, char **realhost, int nodelay)
92 static struct plug_function_table fn_table = {
96 }, *fn_table_ptr = &fn_table;
106 sprintf(buf, "Looking up host \"%.170s\"", host);
109 addr = sk_namelookup(host, realhost);
110 if ((err = sk_addr_error(addr)))
114 port = 513; /* default rlogin port */
120 char buf[200], addrbuf[100];
121 sk_getaddr(addr, addrbuf, 100);
122 sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
125 s = sk_new(addr, port, 1, 0, nodelay, &fn_table_ptr);
126 if ((err = sk_socket_error(s)))
132 * Send local username, remote username, terminal/speed
139 sk_write(s, cfg.localusername, strlen(cfg.localusername));
141 sk_write(s, cfg.username, strlen(cfg.username));
143 sk_write(s, cfg.termtype, strlen(cfg.termtype));
145 for (p = cfg.termspeed; isdigit(*p); p++);
146 sk_write(s, cfg.termspeed, p - cfg.termspeed);
147 rlogin_bufsize = sk_write(s, &z, 1);
154 * Called to send data down the rlogin connection.
156 static int rlogin_send(char *buf, int len)
161 rlogin_bufsize = sk_write(s, buf, len);
163 return rlogin_bufsize;
167 * Called to query the current socket sendability status.
169 static int rlogin_sendbuffer(void)
171 return rlogin_bufsize;
175 * Called to set the size of the window
177 static void rlogin_size(void)
179 char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
188 rlogin_bufsize = sk_write(s, b, 12);
193 * Send rlogin special codes.
195 static void rlogin_special(Telnet_Special code)
201 static Socket rlogin_socket(void)
206 static int rlogin_sendok(void)
211 static void rlogin_unthrottle(int backlog)
213 sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
216 static int rlogin_ldisc(int option)
221 static int rlogin_exitcode(void)
223 /* If we ever implement RSH, we'll probably need to do this properly */
227 Backend rlogin_backend = {