18 #define RAW_MAX_BACKLOG 4096
20 typedef struct raw_backend_data
{
21 const struct plug_function_table
*fn
;
22 /* the above field _must_ be first in the structure */
25 int closed_on_socket_error
;
28 int sent_console_eof
, sent_socket_eof
;
31 static void raw_size(void *handle
, int width
, int height
);
33 static void c_write(Raw raw
, char *buf
, int len
)
35 int backlog
= from_backend(raw
->frontend
, 0, buf
, len
);
36 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
39 static void raw_log(Plug plug
, int type
, SockAddr addr
, int port
,
40 const char *error_msg
, int error_code
)
43 char addrbuf
[256], *msg
;
45 sk_getaddr(addr
, addrbuf
, lenof(addrbuf
));
48 msg
= dupprintf("Connecting to %s port %d", addrbuf
, port
);
50 msg
= dupprintf("Failed to connect to %s: %s", addrbuf
, error_msg
);
52 logevent(raw
->frontend
, msg
);
56 static void raw_check_close(Raw raw
)
59 * Called after we send EOF on either the socket or the console.
60 * Its job is to wind up the session once we have sent EOF on both.
62 if (raw
->sent_console_eof
&& raw
->sent_socket_eof
) {
66 notify_remote_exit(raw
->frontend
);
71 static int raw_closing(Plug plug
, const char *error_msg
, int error_code
,
77 /* A socket error has occurred. */
81 raw
->closed_on_socket_error
= TRUE
;
82 notify_remote_exit(raw
->frontend
);
84 logevent(raw
->frontend
, error_msg
);
85 connection_fatal(raw
->frontend
, "%s", error_msg
);
87 /* Otherwise, the remote side closed the connection normally. */
88 if (!raw
->sent_console_eof
&& from_backend_eof(raw
->frontend
)) {
90 * The front end wants us to close the outgoing side of the
91 * connection as soon as we see EOF from the far end.
93 if (!raw
->sent_socket_eof
) {
96 raw
->sent_socket_eof
= TRUE
;
99 raw
->sent_console_eof
= TRUE
;
100 raw_check_close(raw
);
105 static int raw_receive(Plug plug
, int urgent
, char *data
, int len
)
107 Raw raw
= (Raw
) plug
;
108 c_write(raw
, data
, len
);
112 static void raw_sent(Plug plug
, int bufsize
)
114 Raw raw
= (Raw
) plug
;
115 raw
->bufsize
= bufsize
;
119 * Called to set up the raw connection.
121 * Returns an error message, or NULL on success.
123 * Also places the canonical host name into `realhost'. It must be
124 * freed by the caller.
126 static const char *raw_init(void *frontend_handle
, void **backend_handle
,
128 char *host
, int port
, char **realhost
, int nodelay
,
131 static const struct plug_function_table fn_table
= {
143 raw
= snew(struct raw_backend_data
);
146 raw
->closed_on_socket_error
= FALSE
;
147 *backend_handle
= raw
;
148 raw
->sent_console_eof
= raw
->sent_socket_eof
= FALSE
;
150 raw
->frontend
= frontend_handle
;
152 addressfamily
= conf_get_int(conf
, CONF_addressfamily
);
158 buf
= dupprintf("Looking up host \"%s\"%s", host
,
159 (addressfamily
== ADDRTYPE_IPV4 ?
" (IPv4)" :
160 (addressfamily
== ADDRTYPE_IPV6 ?
" (IPv6)" :
162 logevent(raw
->frontend
, buf
);
165 addr
= name_lookup(host
, port
, realhost
, conf
, addressfamily
);
166 if ((err
= sk_addr_error(addr
)) != NULL
) {
172 port
= 23; /* default telnet port */
177 raw
->s
= new_connection(addr
, *realhost
, port
, 0, 1, nodelay
, keepalive
,
179 if ((err
= sk_socket_error(raw
->s
)) != NULL
)
182 loghost
= conf_get_str(conf
, CONF_loghost
);
187 *realhost
= dupstr(loghost
);
188 colon
= strrchr(*realhost
, ':');
191 * FIXME: if we ever update this aspect of ssh.c for
192 * IPv6 literal management, this should change in line
202 static void raw_free(void *handle
)
204 Raw raw
= (Raw
) handle
;
212 * Stub routine (we don't have any need to reconfigure this backend).
214 static void raw_reconfig(void *handle
, Conf
*conf
)
219 * Called to send data down the raw connection.
221 static int raw_send(void *handle
, char *buf
, int len
)
223 Raw raw
= (Raw
) handle
;
228 raw
->bufsize
= sk_write(raw
->s
, buf
, len
);
234 * Called to query the current socket sendability status.
236 static int raw_sendbuffer(void *handle
)
238 Raw raw
= (Raw
) handle
;
243 * Called to set the size of the window
245 static void raw_size(void *handle
, int width
, int height
)
252 * Send raw special codes. We only handle outgoing EOF here.
254 static void raw_special(void *handle
, Telnet_Special code
)
256 Raw raw
= (Raw
) handle
;
257 if (code
== TS_EOF
&& raw
->s
) {
258 sk_write_eof(raw
->s
);
259 raw
->sent_socket_eof
= TRUE
;
260 raw_check_close(raw
);
267 * Return a list of the special codes that make sense in this
270 static const struct telnet_special
*raw_get_specials(void *handle
)
275 static int raw_connected(void *handle
)
277 Raw raw
= (Raw
) handle
;
278 return raw
->s
!= NULL
;
281 static int raw_sendok(void *handle
)
286 static void raw_unthrottle(void *handle
, int backlog
)
288 Raw raw
= (Raw
) handle
;
289 sk_set_frozen(raw
->s
, backlog
> RAW_MAX_BACKLOG
);
292 static int raw_ldisc(void *handle
, int option
)
294 if (option
== LD_EDIT
|| option
== LD_ECHO
)
299 static void raw_provide_ldisc(void *handle
, void *ldisc
)
301 /* This is a stub. */
304 static void raw_provide_logctx(void *handle
, void *logctx
)
306 /* This is a stub. */
309 static int raw_exitcode(void *handle
)
311 Raw raw
= (Raw
) handle
;
313 return -1; /* still connected */
314 else if (raw
->closed_on_socket_error
)
315 return INT_MAX
; /* a socket error counts as an unclean exit */
317 /* Exit codes are a meaningless concept in the Raw protocol */
322 * cfg_info for Raw does nothing at all.
324 static int raw_cfg_info(void *handle
)
329 Backend raw_backend
= {