14 #define RAW_MAX_BACKLOG 4096
16 static Socket s
= NULL
;
17 static int raw_bufsize
;
19 static void raw_size(void);
21 static void c_write(char *buf
, int len
)
23 int backlog
= from_backend(0, buf
, len
);
24 sk_set_frozen(s
, backlog
> RAW_MAX_BACKLOG
);
27 static int raw_closing(Plug plug
, char *error_msg
, int error_code
,
35 /* A socket error has occurred. */
37 connection_fatal("%s", error_msg
);
38 } /* Otherwise, the remote side closed the connection normally. */
42 static int raw_receive(Plug plug
, int urgent
, char *data
, int len
)
48 static void raw_sent(Plug plug
, int bufsize
)
50 raw_bufsize
= bufsize
;
54 * Called to set up the raw connection.
56 * Returns an error message, or NULL on success.
58 * Also places the canonical host name into `realhost'. It must be
59 * freed by the caller.
61 static char *raw_init(char *host
, int port
, char **realhost
, int nodelay
)
63 static struct plug_function_table fn_table
= {
67 }, *fn_table_ptr
= &fn_table
;
77 sprintf(buf
, "Looking up host \"%.170s\"", host
);
80 addr
= sk_namelookup(host
, realhost
);
81 if ((err
= sk_addr_error(addr
)))
85 port
= 23; /* default telnet port */
91 char buf
[200], addrbuf
[100];
92 sk_getaddr(addr
, addrbuf
, 100);
93 sprintf(buf
, "Connecting to %.100s port %d", addrbuf
, port
);
96 s
= new_connection(addr
, *realhost
, port
, 0, 1, nodelay
, &fn_table_ptr
);
97 if ((err
= sk_socket_error(s
)))
106 * Called to send data down the raw connection.
108 static int raw_send(char *buf
, int len
)
113 raw_bufsize
= sk_write(s
, buf
, len
);
119 * Called to query the current socket sendability status.
121 static int raw_sendbuffer(void)
127 * Called to set the size of the window
129 static void raw_size(void)
136 * Send raw special codes.
138 static void raw_special(Telnet_Special code
)
144 static Socket
raw_socket(void)
149 static int raw_sendok(void)
154 static void raw_unthrottle(int backlog
)
156 sk_set_frozen(s
, backlog
> RAW_MAX_BACKLOG
);
159 static int raw_ldisc(int option
)
161 if (option
== LD_EDIT
|| option
== LD_ECHO
)
166 static int raw_exitcode(void)
168 /* Exit codes are a meaningless concept in the Raw protocol */
172 Backend raw_backend
= {