13 #define RAW_MAX_BACKLOG 4096
15 typedef struct raw_backend_data
{
16 const struct plug_function_table
*fn
;
17 /* the above field _must_ be first in the structure */
24 static void raw_size(void *handle
, int width
, int height
);
26 static void c_write(Raw raw
, char *buf
, int len
)
28 int backlog
= from_backend(raw
->frontend
, 0, buf
, len
);
29 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
32 static int raw_closing(Plug plug
, const char *error_msg
, int error_code
,
42 /* A socket error has occurred. */
43 logevent(raw
->frontend
, error_msg
);
44 connection_fatal(raw
->frontend
, "%s", error_msg
);
45 } /* Otherwise, the remote side closed the connection normally. */
49 static int raw_receive(Plug plug
, int urgent
, char *data
, int len
)
52 c_write(raw
, data
, len
);
56 static void raw_sent(Plug plug
, int bufsize
)
59 raw
->bufsize
= bufsize
;
63 * Called to set up the raw connection.
65 * Returns an error message, or NULL on success.
67 * Also places the canonical host name into `realhost'. It must be
68 * freed by the caller.
70 static const char *raw_init(void *frontend_handle
, void **backend_handle
,
72 char *host
, int port
, char **realhost
, int nodelay
,
75 static const struct plug_function_table fn_table
= {
84 raw
= snew(struct raw_backend_data
);
87 *backend_handle
= raw
;
89 raw
->frontend
= frontend_handle
;
96 buf
= dupprintf("Looking up host \"%s\"", host
);
97 logevent(raw
->frontend
, buf
);
100 addr
= name_lookup(host
, port
, realhost
, cfg
);
101 if ((err
= sk_addr_error(addr
)) != NULL
) {
107 port
= 23; /* default telnet port */
113 char *buf
, addrbuf
[100];
114 sk_getaddr(addr
, addrbuf
, 100);
115 buf
= dupprintf("Connecting to %s port %d", addrbuf
, port
);
116 logevent(raw
->frontend
, buf
);
119 raw
->s
= new_connection(addr
, *realhost
, port
, 0, 1, nodelay
, keepalive
,
121 if ((err
= sk_socket_error(raw
->s
)) != NULL
)
127 static void raw_free(void *handle
)
129 Raw raw
= (Raw
) handle
;
137 * Stub routine (we don't have any need to reconfigure this backend).
139 static void raw_reconfig(void *handle
, Config
*cfg
)
144 * Called to send data down the raw connection.
146 static int raw_send(void *handle
, char *buf
, int len
)
148 Raw raw
= (Raw
) handle
;
153 raw
->bufsize
= sk_write(raw
->s
, buf
, len
);
159 * Called to query the current socket sendability status.
161 static int raw_sendbuffer(void *handle
)
163 Raw raw
= (Raw
) handle
;
168 * Called to set the size of the window
170 static void raw_size(void *handle
, int width
, int height
)
177 * Send raw special codes.
179 static void raw_special(void *handle
, Telnet_Special code
)
186 * Return a list of the special codes that make sense in this
189 static const struct telnet_special
*raw_get_specials(void *handle
)
194 static Socket
raw_socket(void *handle
)
196 Raw raw
= (Raw
) handle
;
200 static int raw_sendok(void *handle
)
205 static void raw_unthrottle(void *handle
, int backlog
)
207 Raw raw
= (Raw
) handle
;
208 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
211 static int raw_ldisc(void *handle
, int option
)
213 if (option
== LD_EDIT
|| option
== LD_ECHO
)
218 static void raw_provide_ldisc(void *handle
, void *ldisc
)
220 /* This is a stub. */
223 static void raw_provide_logctx(void *handle
, void *logctx
)
225 /* This is a stub. */
228 static int raw_exitcode(void *handle
)
230 Raw raw
= (Raw
) handle
;
232 return -1; /* still connected */
234 /* Exit codes are a meaningless concept in the Raw protocol */
238 Backend raw_backend
= {