17 #define RAW_MAX_BACKLOG 4096
19 typedef struct raw_backend_data
{
20 const struct plug_function_table
*fn
;
21 /* the above field _must_ be first in the structure */
26 int sent_console_eof
, sent_socket_eof
;
29 static void raw_size(void *handle
, int width
, int height
);
31 static void c_write(Raw raw
, char *buf
, int len
)
33 int backlog
= from_backend(raw
->frontend
, 0, buf
, len
);
34 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
37 static void raw_log(Plug plug
, int type
, SockAddr addr
, int port
,
38 const char *error_msg
, int error_code
)
41 char addrbuf
[256], *msg
;
43 sk_getaddr(addr
, addrbuf
, lenof(addrbuf
));
46 msg
= dupprintf("Connecting to %s port %d", addrbuf
, port
);
48 msg
= dupprintf("Failed to connect to %s: %s", addrbuf
, error_msg
);
50 logevent(raw
->frontend
, msg
);
53 static void raw_check_close(Raw raw
)
56 * Called after we send EOF on either the socket or the console.
57 * Its job is to wind up the session once we have sent EOF on both.
59 if (raw
->sent_console_eof
&& raw
->sent_socket_eof
) {
63 notify_remote_exit(raw
->frontend
);
68 static int raw_closing(Plug plug
, const char *error_msg
, int error_code
,
74 /* A socket error has occurred. */
78 notify_remote_exit(raw
->frontend
);
80 logevent(raw
->frontend
, error_msg
);
81 connection_fatal(raw
->frontend
, "%s", error_msg
);
83 /* Otherwise, the remote side closed the connection normally. */
84 if (!raw
->sent_console_eof
&& from_backend_eof(raw
->frontend
)) {
86 * The front end wants us to close the outgoing side of the
87 * connection as soon as we see EOF from the far end.
89 if (!raw
->sent_socket_eof
) {
92 raw
->sent_socket_eof
= TRUE
;
95 raw
->sent_console_eof
= TRUE
;
101 static int raw_receive(Plug plug
, int urgent
, char *data
, int len
)
103 Raw raw
= (Raw
) plug
;
104 c_write(raw
, data
, len
);
108 static void raw_sent(Plug plug
, int bufsize
)
110 Raw raw
= (Raw
) plug
;
111 raw
->bufsize
= bufsize
;
115 * Called to set up the raw connection.
117 * Returns an error message, or NULL on success.
119 * Also places the canonical host name into `realhost'. It must be
120 * freed by the caller.
122 static const char *raw_init(void *frontend_handle
, void **backend_handle
,
124 char *host
, int port
, char **realhost
, int nodelay
,
127 static const struct plug_function_table fn_table
= {
139 raw
= snew(struct raw_backend_data
);
142 *backend_handle
= raw
;
143 raw
->sent_console_eof
= raw
->sent_socket_eof
= FALSE
;
145 raw
->frontend
= frontend_handle
;
147 addressfamily
= conf_get_int(conf
, CONF_addressfamily
);
153 buf
= dupprintf("Looking up host \"%s\"%s", host
,
154 (addressfamily
== ADDRTYPE_IPV4 ?
" (IPv4)" :
155 (addressfamily
== ADDRTYPE_IPV6 ?
" (IPv6)" :
157 logevent(raw
->frontend
, buf
);
160 addr
= name_lookup(host
, port
, realhost
, conf
, addressfamily
);
161 if ((err
= sk_addr_error(addr
)) != NULL
) {
167 port
= 23; /* default telnet port */
172 raw
->s
= new_connection(addr
, *realhost
, port
, 0, 1, nodelay
, keepalive
,
174 if ((err
= sk_socket_error(raw
->s
)) != NULL
)
177 loghost
= conf_get_str(conf
, CONF_loghost
);
182 *realhost
= dupstr(loghost
);
183 colon
= strrchr(*realhost
, ':');
186 * FIXME: if we ever update this aspect of ssh.c for
187 * IPv6 literal management, this should change in line
197 static void raw_free(void *handle
)
199 Raw raw
= (Raw
) handle
;
207 * Stub routine (we don't have any need to reconfigure this backend).
209 static void raw_reconfig(void *handle
, Conf
*conf
)
214 * Called to send data down the raw connection.
216 static int raw_send(void *handle
, char *buf
, int len
)
218 Raw raw
= (Raw
) handle
;
223 raw
->bufsize
= sk_write(raw
->s
, buf
, len
);
229 * Called to query the current socket sendability status.
231 static int raw_sendbuffer(void *handle
)
233 Raw raw
= (Raw
) handle
;
238 * Called to set the size of the window
240 static void raw_size(void *handle
, int width
, int height
)
247 * Send raw special codes. We only handle outgoing EOF here.
249 static void raw_special(void *handle
, Telnet_Special code
)
251 Raw raw
= (Raw
) handle
;
252 if (code
== TS_EOF
&& raw
->s
) {
253 sk_write_eof(raw
->s
);
254 raw
->sent_socket_eof
= TRUE
;
255 raw_check_close(raw
);
262 * Return a list of the special codes that make sense in this
265 static const struct telnet_special
*raw_get_specials(void *handle
)
270 static int raw_connected(void *handle
)
272 Raw raw
= (Raw
) handle
;
273 return raw
->s
!= NULL
;
276 static int raw_sendok(void *handle
)
281 static void raw_unthrottle(void *handle
, int backlog
)
283 Raw raw
= (Raw
) handle
;
284 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
287 static int raw_ldisc(void *handle
, int option
)
289 if (option
== LD_EDIT
|| option
== LD_ECHO
)
294 static void raw_provide_ldisc(void *handle
, void *ldisc
)
296 /* This is a stub. */
299 static void raw_provide_logctx(void *handle
, void *logctx
)
301 /* This is a stub. */
304 static int raw_exitcode(void *handle
)
306 Raw raw
= (Raw
) handle
;
308 return -1; /* still connected */
310 /* Exit codes are a meaningless concept in the Raw protocol */
315 * cfg_info for Raw does nothing at all.
317 static int raw_cfg_info(void *handle
)
322 Backend raw_backend
= {