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
, char *error_msg
, int error_code
,
42 /* A socket error has occurred. */
43 logevent(raw
->frontend
, error_msg
);
44 connection_fatal("%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 char *raw_init(void *frontend_handle
, void **backend_handle
,
72 char *host
, int port
, char **realhost
, int nodelay
)
74 static const struct plug_function_table fn_table
= {
83 raw
= snew(struct raw_backend_data
);
86 *backend_handle
= raw
;
88 raw
->frontend
= frontend_handle
;
95 buf
= dupprintf("Looking up host \"%s\"", host
);
96 logevent(raw
->frontend
, buf
);
99 addr
= name_lookup(host
, port
, realhost
, cfg
);
100 if ((err
= sk_addr_error(addr
)) != NULL
)
104 port
= 23; /* default telnet port */
110 char *buf
, addrbuf
[100];
111 sk_getaddr(addr
, addrbuf
, 100);
112 buf
= dupprintf("Connecting to %s port %d", addrbuf
, port
);
113 logevent(raw
->frontend
, buf
);
116 raw
->s
= new_connection(addr
, *realhost
, port
, 0, 1, nodelay
,
118 if ((err
= sk_socket_error(raw
->s
)) != NULL
)
126 static void raw_free(void *handle
)
128 Raw raw
= (Raw
) handle
;
136 * Stub routine (we don't have any need to reconfigure this backend).
138 static void raw_reconfig(void *handle
, Config
*cfg
)
143 * Called to send data down the raw connection.
145 static int raw_send(void *handle
, char *buf
, int len
)
147 Raw raw
= (Raw
) handle
;
152 raw
->bufsize
= sk_write(raw
->s
, buf
, len
);
158 * Called to query the current socket sendability status.
160 static int raw_sendbuffer(void *handle
)
162 Raw raw
= (Raw
) handle
;
167 * Called to set the size of the window
169 static void raw_size(void *handle
, int width
, int height
)
176 * Send raw special codes.
178 static void raw_special(void *handle
, Telnet_Special code
)
184 static Socket
raw_socket(void *handle
)
186 Raw raw
= (Raw
) handle
;
190 static int raw_sendok(void *handle
)
195 static void raw_unthrottle(void *handle
, int backlog
)
197 Raw raw
= (Raw
) handle
;
198 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
201 static int raw_ldisc(void *handle
, int option
)
203 if (option
== LD_EDIT
|| option
== LD_ECHO
)
208 static void raw_provide_ldisc(void *handle
, void *ldisc
)
210 /* This is a stub. */
213 static void raw_provide_logctx(void *handle
, void *logctx
)
215 /* This is a stub. */
218 static int raw_exitcode(void *handle
)
220 /* Exit codes are a meaningless concept in the Raw protocol */
224 Backend raw_backend
= {