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 void raw_log(Plug plug, int type, SockAddr addr, int port,
33 const char *error_msg, int error_code)
36 char addrbuf[256], *msg;
38 sk_getaddr(addr, addrbuf, lenof(addrbuf));
41 msg = dupprintf("Connecting to %s port %d", addrbuf, port);
43 msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg);
45 logevent(raw->frontend, msg);
48 static int raw_closing(Plug plug, const char *error_msg, int error_code,
56 notify_remote_exit(raw->frontend);
59 /* A socket error has occurred. */
60 logevent(raw->frontend, error_msg);
61 connection_fatal(raw->frontend, "%s", error_msg);
62 } /* Otherwise, the remote side closed the connection normally. */
66 static int raw_receive(Plug plug, int urgent, char *data, int len)
69 c_write(raw, data, len);
73 static void raw_sent(Plug plug, int bufsize)
76 raw->bufsize = bufsize;
80 * Called to set up the raw connection.
82 * Returns an error message, or NULL on success.
84 * Also places the canonical host name into `realhost'. It must be
85 * freed by the caller.
87 static const char *raw_init(void *frontend_handle, void **backend_handle,
89 char *host, int port, char **realhost, int nodelay,
92 static const struct plug_function_table fn_table = {
102 raw = snew(struct raw_backend_data);
105 *backend_handle = raw;
107 raw->frontend = frontend_handle;
114 buf = dupprintf("Looking up host \"%s\"%s", host,
115 (cfg->addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :
116 (cfg->addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :
118 logevent(raw->frontend, buf);
121 addr = name_lookup(host, port, realhost, cfg, cfg->addressfamily);
122 if ((err = sk_addr_error(addr)) != NULL) {
128 port = 23; /* default telnet port */
133 raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive,
135 if ((err = sk_socket_error(raw->s)) != NULL)
141 static void raw_free(void *handle)
143 Raw raw = (Raw) handle;
151 * Stub routine (we don't have any need to reconfigure this backend).
153 static void raw_reconfig(void *handle, Config *cfg)
158 * Called to send data down the raw connection.
160 static int raw_send(void *handle, char *buf, int len)
162 Raw raw = (Raw) handle;
167 raw->bufsize = sk_write(raw->s, buf, len);
173 * Called to query the current socket sendability status.
175 static int raw_sendbuffer(void *handle)
177 Raw raw = (Raw) handle;
182 * Called to set the size of the window
184 static void raw_size(void *handle, int width, int height)
191 * Send raw special codes.
193 static void raw_special(void *handle, Telnet_Special code)
200 * Return a list of the special codes that make sense in this
203 static const struct telnet_special *raw_get_specials(void *handle)
208 static Socket raw_socket(void *handle)
210 Raw raw = (Raw) handle;
214 static int raw_sendok(void *handle)
219 static void raw_unthrottle(void *handle, int backlog)
221 Raw raw = (Raw) handle;
222 sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
225 static int raw_ldisc(void *handle, int option)
227 if (option == LD_EDIT || option == LD_ECHO)
232 static void raw_provide_ldisc(void *handle, void *ldisc)
234 /* This is a stub. */
237 static void raw_provide_logctx(void *handle, void *logctx)
239 /* This is a stub. */
242 static int raw_exitcode(void *handle)
244 Raw raw = (Raw) handle;
246 return -1; /* still connected */
248 /* Exit codes are a meaningless concept in the Raw protocol */
253 * cfg_info for Raw does nothing at all.
255 static int raw_cfg_info(void *handle)
260 Backend raw_backend = {