-#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#define TRUE 1
#endif
-static Socket s = NULL;
+#define RAW_MAX_BACKLOG 4096
-static void raw_size(void);
+typedef struct raw_backend_data {
+ const struct plug_function_table *fn;
+ /* the above field _must_ be first in the structure */
-static int sb_opt, sb_len;
-static char *sb_buf = NULL;
-static int sb_size = 0;
-#define SB_DELTA 1024
+ Socket s;
+ int bufsize;
+ void *frontend;
+} *Raw;
-static void c_write (char *buf, int len) {
- from_backend(0, buf, len);
+static void raw_size(void *handle, int width, int height);
+
+static void c_write(Raw raw, char *buf, int len)
+{
+ int backlog = from_backend(raw->frontend, 0, buf, len);
+ sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
}
-static int raw_receive (Socket s, int urgent, char *data, int len) {
- if (urgent==3) {
- /* A socket error has occurred. */
- connection_fatal(data);
- len = 0;
- }
- if (!len) {
- /* Connection has closed. */
- sk_close(s);
- s = NULL;
- return 0;
+static int raw_closing(Plug plug, const char *error_msg, int error_code,
+ int calling_back)
+{
+ Raw raw = (Raw) plug;
+
+ if (raw->s) {
+ sk_close(raw->s);
+ raw->s = NULL;
+ notify_remote_exit(raw->frontend);
}
- c_write(data, len);
+ if (error_msg) {
+ /* A socket error has occurred. */
+ logevent(raw->frontend, error_msg);
+ connection_fatal(raw->frontend, "%s", error_msg);
+ } /* Otherwise, the remote side closed the connection normally. */
+ return 0;
+}
+
+static int raw_receive(Plug plug, int urgent, char *data, int len)
+{
+ Raw raw = (Raw) plug;
+ c_write(raw, data, len);
return 1;
}
+static void raw_sent(Plug plug, int bufsize)
+{
+ Raw raw = (Raw) plug;
+ raw->bufsize = bufsize;
+}
+
/*
* Called to set up the raw connection.
*
* Returns an error message, or NULL on success.
*
- * Also places the canonical host name into `realhost'.
+ * Also places the canonical host name into `realhost'. It must be
+ * freed by the caller.
*/
-static char *raw_init (char *host, int port, char **realhost) {
+static const char *raw_init(void *frontend_handle, void **backend_handle,
+ Config *cfg,
+ char *host, int port, char **realhost, int nodelay,
+ int keepalive)
+{
+ static const struct plug_function_table fn_table = {
+ raw_closing,
+ raw_receive,
+ raw_sent
+ };
SockAddr addr;
- char *err;
+ const char *err;
+ Raw raw;
+
+ raw = snew(struct raw_backend_data);
+ raw->fn = &fn_table;
+ raw->s = NULL;
+ *backend_handle = raw;
+
+ raw->frontend = frontend_handle;
/*
* Try to find host.
*/
- addr = sk_namelookup(host, realhost);
- if ( (err = sk_addr_error(addr)) )
+ {
+ char *buf;
+ buf = dupprintf("Looking up host \"%s\"", host);
+ logevent(raw->frontend, buf);
+ sfree(buf);
+ }
+ addr = name_lookup(host, port, realhost, cfg);
+ if ((err = sk_addr_error(addr)) != NULL) {
+ sk_addr_free(addr);
return err;
+ }
if (port < 0)
port = 23; /* default telnet port */
/*
* Open socket.
*/
- s = sk_new(addr, port, 0, raw_receive);
- if ( (err = sk_socket_error(s)) )
+ {
+ char *buf, addrbuf[100];
+ sk_getaddr(addr, addrbuf, 100);
+ buf = dupprintf("Connecting to %s port %d", addrbuf, port);
+ logevent(raw->frontend, buf);
+ sfree(buf);
+ }
+ raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive,
+ (Plug) raw, cfg);
+ if ((err = sk_socket_error(raw->s)) != NULL)
return err;
- sk_addr_free(addr);
+ return NULL;
+}
- /*
- * We have no pre-session phase.
- */
- begin_session();
+static void raw_free(void *handle)
+{
+ Raw raw = (Raw) handle;
- return NULL;
+ if (raw->s)
+ sk_close(raw->s);
+ sfree(raw);
+}
+
+/*
+ * Stub routine (we don't have any need to reconfigure this backend).
+ */
+static void raw_reconfig(void *handle, Config *cfg)
+{
}
/*
* Called to send data down the raw connection.
*/
-static void raw_send (char *buf, int len) {
+static int raw_send(void *handle, char *buf, int len)
+{
+ Raw raw = (Raw) handle;
+
+ if (raw->s == NULL)
+ return 0;
+
+ raw->bufsize = sk_write(raw->s, buf, len);
- if (s == NULL)
- return;
+ return raw->bufsize;
+}
- sk_write(s, buf, len);
+/*
+ * Called to query the current socket sendability status.
+ */
+static int raw_sendbuffer(void *handle)
+{
+ Raw raw = (Raw) handle;
+ return raw->bufsize;
}
/*
* Called to set the size of the window
*/
-static void raw_size(void) {
+static void raw_size(void *handle, int width, int height)
+{
/* Do nothing! */
return;
}
/*
* Send raw special codes.
*/
-static void raw_special (Telnet_Special code) {
+static void raw_special(void *handle, Telnet_Special code)
+{
/* Do nothing! */
return;
}
-static Socket raw_socket(void) { return s; }
+/*
+ * Return a list of the special codes that make sense in this
+ * protocol.
+ */
+static const struct telnet_special *raw_get_specials(void *handle)
+{
+ return NULL;
+}
-static int raw_sendok(void) { return 1; }
+static Socket raw_socket(void *handle)
+{
+ Raw raw = (Raw) handle;
+ return raw->s;
+}
+
+static int raw_sendok(void *handle)
+{
+ return 1;
+}
+
+static void raw_unthrottle(void *handle, int backlog)
+{
+ Raw raw = (Raw) handle;
+ sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
+}
+
+static int raw_ldisc(void *handle, int option)
+{
+ if (option == LD_EDIT || option == LD_ECHO)
+ return 1;
+ return 0;
+}
+
+static void raw_provide_ldisc(void *handle, void *ldisc)
+{
+ /* This is a stub. */
+}
+
+static void raw_provide_logctx(void *handle, void *logctx)
+{
+ /* This is a stub. */
+}
+
+static int raw_exitcode(void *handle)
+{
+ Raw raw = (Raw) handle;
+ if (raw->s != NULL)
+ return -1; /* still connected */
+ else
+ /* Exit codes are a meaningless concept in the Raw protocol */
+ return 0;
+}
+
+/*
+ * cfg_info for Raw does nothing at all.
+ */
+static int raw_cfg_info(void *handle)
+{
+ return 0;
+}
Backend raw_backend = {
raw_init,
+ raw_free,
+ raw_reconfig,
raw_send,
+ raw_sendbuffer,
raw_size,
raw_special,
+ raw_get_specials,
raw_socket,
+ raw_exitcode,
raw_sendok,
+ raw_ldisc,
+ raw_provide_ldisc,
+ raw_provide_logctx,
+ raw_unthrottle,
+ raw_cfg_info,
1
};
projects / u / mdw / putty / blobdiff