#define TRUE 1
#endif
+#define RLOGIN_MAX_BACKLOG 4096
+
static Socket s = NULL;
+static int rlogin_bufsize;
static void rlogin_size(void);
-static int sb_opt, sb_len;
-static char *sb_buf = NULL;
-static int sb_size = 0;
-#define SB_DELTA 1024
-
static void c_write(char *buf, int len)
{
- from_backend(0, buf, len);
+ int backlog = from_backend(0, buf, len);
+ sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
}
static int rlogin_closing(Plug plug, char *error_msg, int error_code,
int calling_back)
{
- sk_close(s);
- s = NULL;
+ if (s) {
+ sk_close(s);
+ s = NULL;
+ }
if (error_msg) {
/* A socket error has occurred. */
connection_fatal(error_msg);
*
* 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 *rlogin_init(char *host, int port, char **realhost)
{
sk_write(s, "/", 1);
for (p = cfg.termspeed; isdigit(*p); p++);
sk_write(s, cfg.termspeed, p - cfg.termspeed);
- sk_write(s, &z, 1);
+ rlogin_bufsize = sk_write(s, &z, 1);
}
return NULL;
/*
* Called to send data down the rlogin connection.
*/
-static void rlogin_send(char *buf, int len)
+static int rlogin_send(char *buf, int len)
{
-
if (s == NULL)
- return;
+ return 0;
+
+ rlogin_bufsize = sk_write(s, buf, len);
+
+ return rlogin_bufsize;
+}
- sk_write(s, buf, len);
+/*
+ * Called to query the current socket sendability status.
+ */
+static int rlogin_sendbuffer(void)
+{
+ return rlogin_bufsize;
}
/*
b[7] = cols & 0xFF;
b[4] = rows >> 8;
b[5] = rows & 0xFF;
- sk_write(s, b, 12);
+ rlogin_bufsize = sk_write(s, b, 12);
return;
}
return 1;
}
+static void rlogin_unthrottle(int backlog)
+{
+ sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
+}
+
static int rlogin_ldisc(int option)
{
return 0;
Backend rlogin_backend = {
rlogin_init,
rlogin_send,
+ rlogin_sendbuffer,
rlogin_size,
rlogin_special,
rlogin_socket,
rlogin_sendok,
rlogin_ldisc,
+ rlogin_unthrottle,
1
};