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,
71 char *host, int port, char **realhost, int nodelay)
73 static const struct plug_function_table fn_table = {
82 raw = smalloc(sizeof(*raw));
85 *backend_handle = raw;
87 raw->frontend = frontend_handle;
94 buf = dupprintf("Looking up host \"%s\"", host);
95 logevent(raw->frontend, buf);
98 addr = sk_namelookup(host, realhost);
99 if ((err = sk_addr_error(addr)))
103 port = 23; /* default telnet port */
109 char *buf, addrbuf[100];
110 sk_getaddr(addr, addrbuf, 100);
111 buf = dupprintf("Connecting to %s port %d", addrbuf, port);
112 logevent(raw->frontend, buf);
115 raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, (Plug) raw);
116 if ((err = sk_socket_error(raw->s)))
125 * Called to send data down the raw connection.
127 static int raw_send(void *handle, char *buf, int len)
129 Raw raw = (Raw) handle;
134 raw->bufsize = sk_write(raw->s, buf, len);
140 * Called to query the current socket sendability status.
142 static int raw_sendbuffer(void *handle)
144 Raw raw = (Raw) handle;
149 * Called to set the size of the window
151 static void raw_size(void *handle, int width, int height)
158 * Send raw special codes.
160 static void raw_special(void *handle, Telnet_Special code)
166 static Socket raw_socket(void *handle)
168 Raw raw = (Raw) handle;
172 static int raw_sendok(void *handle)
177 static void raw_unthrottle(void *handle, int backlog)
179 Raw raw = (Raw) handle;
180 sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
183 static int raw_ldisc(void *handle, int option)
185 if (option == LD_EDIT || option == LD_ECHO)
190 static void raw_provide_ldisc(void *handle, void *ldisc)
192 /* This is a stub. */
195 static void raw_provide_logctx(void *handle, void *logctx)
197 /* This is a stub. */
200 static int raw_exitcode(void *handle)
202 /* Exit codes are a meaningless concept in the Raw protocol */
206 Backend raw_backend = {