X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/7dbb9f565cd73e01515dadd6825c3cd0322b9783..818ab3bbbe73842da6b50d75ad4a64e40de5e2e6:/raw.c

diff --git a/raw.c b/raw.c
index 27af2c4e..90fc8a84 100644
--- a/raw.c
+++ b/raw.c
@@ -11,52 +11,78 @@
 #define TRUE 1
 #endif
 
-static Socket s = NULL;
+#define RAW_MAX_BACKLOG 4096
 
-static void raw_size(void);
+static Socket s = NULL;
+static int raw_bufsize;
+static void *frontend;
 
-static int sb_opt, sb_len;
-static char *sb_buf = NULL;
-static int sb_size = 0;
-#define SB_DELTA 1024
+static void raw_size(int width, int height);
 
-static void c_write (char *buf, int len) {
-    from_backend(0, buf, len);
+static void c_write(char *buf, int len)
+{
+    int backlog = from_backend(frontend, 0, buf, len);
+    sk_set_frozen(s, backlog > RAW_MAX_BACKLOG);
 }
 
-static int raw_receive (Socket skt, int urgent, char *data, int len) {
-    if (urgent==3) {
-        /* A socket error has occurred. */
+static int raw_closing(Plug plug, char *error_msg, int error_code,
+		       int calling_back)
+{
+    if (s) {
+        sk_close(s);
         s = NULL;
-        connection_fatal(data);
-        len = 0;
-    }
-    if (!len) {
-	/* Connection has closed. */
-	sk_close(s);
-	s = NULL;
-	return 0;
     }
+    if (error_msg) {
+	/* A socket error has occurred. */
+	logevent(error_msg);
+	connection_fatal("%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)
+{
     c_write(data, len);
     return 1;
 }
 
+static void raw_sent(Plug plug, int bufsize)
+{
+    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 char *raw_init(void *frontend_handle, char *host, int port,
+		      char **realhost, int nodelay)
+{
+    static struct plug_function_table fn_table = {
+	raw_closing,
+	raw_receive,
+	raw_sent
+    }, *fn_table_ptr = &fn_table;
+
     SockAddr addr;
     char *err;
 
+    frontend = frontend_handle;
+
     /*
      * Try to find host.
      */
+    {
+	char buf[200];
+	sprintf(buf, "Looking up host \"%.170s\"", host);
+	logevent(buf);
+    }
     addr = sk_namelookup(host, realhost);
-    if ( (err = sk_addr_error(addr)) )
+    if ((err = sk_addr_error(addr)))
 	return err;
 
     if (port < 0)
@@ -65,8 +91,14 @@ static char *raw_init (char *host, int port, char **realhost) {
     /*
      * Open socket.
      */
-    s = sk_new(addr, port, 0, raw_receive);
-    if ( (err = sk_socket_error(s)) )
+    {
+	char buf[200], addrbuf[100];
+	sk_getaddr(addr, addrbuf, 100);
+	sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
+	logevent(buf);
+    }
+    s = new_connection(addr, *realhost, port, 0, 1, nodelay, &fn_table_ptr);
+    if ((err = sk_socket_error(s)))
 	return err;
 
     sk_addr_free(addr);
@@ -77,18 +109,29 @@ static char *raw_init (char *host, int port, char **realhost) {
 /*
  * Called to send data down the raw connection.
  */
-static void raw_send (char *buf, int len) {
-
+static int raw_send(char *buf, int len)
+{
     if (s == NULL)
-	return;
+	return 0;
+
+    raw_bufsize = sk_write(s, buf, len);
 
-    sk_write(s, buf, len);
+    return raw_bufsize;
+}
+
+/*
+ * Called to query the current socket sendability status.
+ */
+static int raw_sendbuffer(void)
+{
+    return raw_bufsize;
 }
 
 /*
  * Called to set the size of the window
  */
-static void raw_size(void) {
+static void raw_size(int width, int height)
+{
     /* Do nothing! */
     return;
 }
@@ -96,28 +139,50 @@ static void raw_size(void) {
 /*
  * Send raw special codes.
  */
-static void raw_special (Telnet_Special code) {
+static void raw_special(Telnet_Special code)
+{
     /* Do nothing! */
     return;
 }
 
-static Socket raw_socket(void) { return s; }
+static Socket raw_socket(void)
+{
+    return s;
+}
+
+static int raw_sendok(void)
+{
+    return 1;
+}
 
-static int raw_sendok(void) { return 1; }
+static void raw_unthrottle(int backlog)
+{
+    sk_set_frozen(s, backlog > RAW_MAX_BACKLOG);
+}
 
-static int raw_ldisc(int option) {
+static int raw_ldisc(int option)
+{
     if (option == LD_EDIT || option == LD_ECHO)
-        return 1;
+	return 1;
+    return 0;
+}
+
+static int raw_exitcode(void)
+{
+    /* Exit codes are a meaningless concept in the Raw protocol */
     return 0;
 }
 
 Backend raw_backend = {
     raw_init,
     raw_send,
+    raw_sendbuffer,
     raw_size,
     raw_special,
     raw_socket,
+    raw_exitcode,
     raw_sendok,
     raw_ldisc,
+    raw_unthrottle,
     1
 };