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 */
28 static void raw_size(void *handle, int width, int height);
30 static void c_write(Raw raw, char *buf, int len)
32 int backlog = from_backend(raw->frontend, 0, buf, len);
33 sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
36 static void raw_log(Plug plug, int type, SockAddr addr, int port,
37 const char *error_msg, int error_code)
40 char addrbuf[256], *msg;
42 sk_getaddr(addr, addrbuf, lenof(addrbuf));
45 msg = dupprintf("Connecting to %s port %d", addrbuf, port);
47 msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg);
49 logevent(raw->frontend, msg);
52 static int raw_closing(Plug plug, const char *error_msg, int error_code,
60 notify_remote_exit(raw->frontend);
63 /* A socket error has occurred. */
64 logevent(raw->frontend, error_msg);
65 connection_fatal(raw->frontend, "%s", error_msg);
66 } /* Otherwise, the remote side closed the connection normally. */
70 static int raw_receive(Plug plug, int urgent, char *data, int len)
73 c_write(raw, data, len);
77 static void raw_sent(Plug plug, int bufsize)
80 raw->bufsize = bufsize;
84 * Called to set up the raw connection.
86 * Returns an error message, or NULL on success.
88 * Also places the canonical host name into `realhost'. It must be
89 * freed by the caller.
91 static const char *raw_init(void *frontend_handle, void **backend_handle,
93 char *host, int port, char **realhost, int nodelay,
96 static const struct plug_function_table fn_table = {
108 raw = snew(struct raw_backend_data);
111 *backend_handle = raw;
113 raw->frontend = frontend_handle;
115 addressfamily = conf_get_int(conf, CONF_addressfamily);
121 buf = dupprintf("Looking up host \"%s\"%s", host,
122 (addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :
123 (addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :
125 logevent(raw->frontend, buf);
128 addr = name_lookup(host, port, realhost, conf, addressfamily);
129 if ((err = sk_addr_error(addr)) != NULL) {
135 port = 23; /* default telnet port */
140 raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive,
142 if ((err = sk_socket_error(raw->s)) != NULL)
145 loghost = conf_get_str(conf, CONF_loghost);
150 *realhost = dupstr(loghost);
151 colon = strrchr(*realhost, ':');
154 * FIXME: if we ever update this aspect of ssh.c for
155 * IPv6 literal management, this should change in line
165 static void raw_free(void *handle)
167 Raw raw = (Raw) handle;
175 * Stub routine (we don't have any need to reconfigure this backend).
177 static void raw_reconfig(void *handle, Conf *conf)
182 * Called to send data down the raw connection.
184 static int raw_send(void *handle, char *buf, int len)
186 Raw raw = (Raw) handle;
191 raw->bufsize = sk_write(raw->s, buf, len);
197 * Called to query the current socket sendability status.
199 static int raw_sendbuffer(void *handle)
201 Raw raw = (Raw) handle;
206 * Called to set the size of the window
208 static void raw_size(void *handle, int width, int height)
215 * Send raw special codes.
217 static void raw_special(void *handle, Telnet_Special code)
224 * Return a list of the special codes that make sense in this
227 static const struct telnet_special *raw_get_specials(void *handle)
232 static int raw_connected(void *handle)
234 Raw raw = (Raw) handle;
235 return raw->s != NULL;
238 static int raw_sendok(void *handle)
243 static void raw_unthrottle(void *handle, int backlog)
245 Raw raw = (Raw) handle;
246 sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
249 static int raw_ldisc(void *handle, int option)
251 if (option == LD_EDIT || option == LD_ECHO)
256 static void raw_provide_ldisc(void *handle, void *ldisc)
258 /* This is a stub. */
261 static void raw_provide_logctx(void *handle, void *logctx)
263 /* This is a stub. */
266 static int raw_exitcode(void *handle)
268 Raw raw = (Raw) handle;
270 return -1; /* still connected */
272 /* Exit codes are a meaningless concept in the Raw protocol */
277 * cfg_info for Raw does nothing at all.
279 static int raw_cfg_info(void *handle)
284 Backend raw_backend = {