14 #define RAW_MAX_BACKLOG 4096
16 static Socket s
= NULL
;
17 static int raw_bufsize
;
18 static void *frontend
;
20 static void raw_size(void);
22 static void c_write(char *buf
, int len
)
24 int backlog
= from_backend(frontend
, 0, buf
, len
);
25 sk_set_frozen(s
, backlog
> RAW_MAX_BACKLOG
);
28 static int raw_closing(Plug plug
, char *error_msg
, int error_code
,
36 /* A socket error has occurred. */
38 connection_fatal("%s", error_msg
);
39 } /* Otherwise, the remote side closed the connection normally. */
43 static int raw_receive(Plug plug
, int urgent
, char *data
, int len
)
49 static void raw_sent(Plug plug
, int bufsize
)
51 raw_bufsize
= bufsize
;
55 * Called to set up the raw connection.
57 * Returns an error message, or NULL on success.
59 * Also places the canonical host name into `realhost'. It must be
60 * freed by the caller.
62 static char *raw_init(void *frontend_handle
, char *host
, int port
,
63 char **realhost
, int nodelay
)
65 static struct plug_function_table fn_table
= {
69 }, *fn_table_ptr
= &fn_table
;
74 frontend
= frontend_handle
;
81 sprintf(buf
, "Looking up host \"%.170s\"", host
);
84 addr
= sk_namelookup(host
, realhost
);
85 if ((err
= sk_addr_error(addr
)))
89 port
= 23; /* default telnet port */
95 char buf
[200], addrbuf
[100];
96 sk_getaddr(addr
, addrbuf
, 100);
97 sprintf(buf
, "Connecting to %.100s port %d", addrbuf
, port
);
100 s
= new_connection(addr
, *realhost
, port
, 0, 1, nodelay
, &fn_table_ptr
);
101 if ((err
= sk_socket_error(s
)))
110 * Called to send data down the raw connection.
112 static int raw_send(char *buf
, int len
)
117 raw_bufsize
= sk_write(s
, buf
, len
);
123 * Called to query the current socket sendability status.
125 static int raw_sendbuffer(void)
131 * Called to set the size of the window
133 static void raw_size(void)
140 * Send raw special codes.
142 static void raw_special(Telnet_Special code
)
148 static Socket
raw_socket(void)
153 static int raw_sendok(void)
158 static void raw_unthrottle(int backlog
)
160 sk_set_frozen(s
, backlog
> RAW_MAX_BACKLOG
);
163 static int raw_ldisc(int option
)
165 if (option
== LD_EDIT
|| option
== LD_ECHO
)
170 static int raw_exitcode(void)
172 /* Exit codes are a meaningless concept in the Raw protocol */
176 Backend raw_backend
= {