14 #define RAW_MAX_BACKLOG 4096
16 typedef struct raw_backend_data {
17 const struct plug_function_table *fn;
18 /* the above field _must_ be first in the structure */
25 static void raw_size(void *handle, int width, int height);
27 static void c_write(Raw raw, char *buf, int len)
29 int backlog = from_backend(raw->frontend, 0, buf, len);
30 sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
33 static int raw_closing(Plug plug, char *error_msg, int error_code,
43 /* A socket error has occurred. */
44 logevent(raw->frontend, error_msg);
45 connection_fatal("%s", error_msg);
46 } /* Otherwise, the remote side closed the connection normally. */
50 static int raw_receive(Plug plug, int urgent, char *data, int len)
53 c_write(raw, data, len);
57 static void raw_sent(Plug plug, int bufsize)
60 raw->bufsize = bufsize;
64 * Called to set up the raw connection.
66 * Returns an error message, or NULL on success.
68 * Also places the canonical host name into `realhost'. It must be
69 * freed by the caller.
71 static char *raw_init(void *frontend_handle, void **backend_handle,
72 char *host, int port, char **realhost, int nodelay)
74 static const struct plug_function_table fn_table = {
83 raw = smalloc(sizeof(*raw));
86 *backend_handle = raw;
88 raw->frontend = frontend_handle;
95 sprintf(buf, "Looking up host \"%.170s\"", host);
96 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[200], addrbuf[100];
110 sk_getaddr(addr, addrbuf, 100);
111 sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
112 logevent(raw->frontend, buf);
114 raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, (Plug) raw);
115 if ((err = sk_socket_error(raw->s)))
124 * Called to send data down the raw connection.
126 static int raw_send(void *handle, char *buf, int len)
128 Raw raw = (Raw) handle;
133 raw->bufsize = sk_write(raw->s, buf, len);
139 * Called to query the current socket sendability status.
141 static int raw_sendbuffer(void *handle)
143 Raw raw = (Raw) handle;
148 * Called to set the size of the window
150 static void raw_size(void *handle, int width, int height)
157 * Send raw special codes.
159 static void raw_special(void *handle, Telnet_Special code)
165 static Socket raw_socket(void *handle)
167 Raw raw = (Raw) handle;
171 static int raw_sendok(void *handle)
176 static void raw_unthrottle(void *handle, int backlog)
178 Raw raw = (Raw) handle;
179 sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
182 static int raw_ldisc(void *handle, int option)
184 if (option == LD_EDIT || option == LD_ECHO)
189 static void raw_provide_ldisc(void *handle, void *ldisc)
191 /* This is a stub. */
194 static void raw_provide_logctx(void *handle, void *logctx)
196 /* This is a stub. */
199 static int raw_exitcode(void *handle)
201 /* Exit codes are a meaningless concept in the Raw protocol */
205 Backend raw_backend = {