#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
+#include <ctype.h>
#include "putty.h"
#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);
+static void c_write(char *buf, int len)
+{
+ int backlog = from_backend(0, buf, len);
+ sk_set_frozen(s, backlog > RLOGIN_MAX_BACKLOG);
}
-static int rlogin_receive (Socket s, int urgent, char *data, int len) {
- if (!len) {
- /* Connection has closed. */
- sk_close(s);
- s = NULL;
- return 0;
+static int rlogin_closing(Plug plug, char *error_msg, int error_code,
+ int calling_back)
+{
+ if (s) {
+ sk_close(s);
+ s = NULL;
}
+ if (error_msg) {
+ /* A socket error has occurred. */
+ connection_fatal(error_msg);
+ } /* Otherwise, the remote side closed the connection normally. */
+ return 0;
+}
+
+static int rlogin_receive(Plug plug, int urgent, char *data, int len)
+{
if (urgent == 2) {
- char c;
-
- c = *data++; len--;
- if (c == 0x80)
- rlogin_size();
- /*
- * We should flush everything (aka Telnet SYNCH) if we see
- * 0x02, and we should turn off and on _local_ flow control
- * on 0x10 and 0x20 respectively. I'm not convinced it's
- * worth it...
- */
+ char c;
+
+ c = *data++;
+ len--;
+ if (c == '\x80')
+ rlogin_size();
+ /*
+ * We should flush everything (aka Telnet SYNCH) if we see
+ * 0x02, and we should turn off and on _local_ flow control
+ * on 0x10 and 0x20 respectively. I'm not convinced it's
+ * worth it...
+ */
+ } else {
+ /*
+ * Main rlogin protocol. This is really simple: the first
+ * byte is expected to be NULL and is ignored, and the rest
+ * is printed.
+ */
+ static int firstbyte = 1;
+ if (firstbyte) {
+ if (data[0] == '\0') {
+ data++;
+ len--;
+ }
+ firstbyte = 0;
+ }
+ c_write(data, len);
}
- c_write(data, len);
return 1;
}
*
* 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) {
+static char *rlogin_init(char *host, int port, char **realhost)
+{
+ static struct plug_function_table fn_table = {
+ rlogin_closing,
+ rlogin_receive
+ }, *fn_table_ptr = &fn_table;
+
SockAddr addr;
char *err;
* Try to find host.
*/
addr = sk_namelookup(host, realhost);
- if ( (err = sk_addr_error(addr)) )
+ if ((err = sk_addr_error(addr)))
return err;
if (port < 0)
/*
* Open socket.
*/
- s = sk_new(addr, port, 1, rlogin_receive);
- if ( (err = sk_socket_error(s)) )
+ s = sk_new(addr, port, 1, 0, &fn_table_ptr);
+ if ((err = sk_socket_error(s)))
return err;
sk_addr_free(addr);
*/
{
- char z = 0;
- char *p;
- sk_write(s, &z, 1);
- sk_write(s, cfg.localusername, strlen(cfg.localusername));
- sk_write(s, &z, 1);
- sk_write(s, cfg.username, strlen(cfg.username));
- sk_write(s, &z, 1);
- sk_write(s, cfg.termtype, strlen(cfg.termtype));
- sk_write(s, "/", 1);
- for(p = cfg.termspeed; isdigit(*p); p++);
- sk_write(s, cfg.termspeed, p - cfg.termspeed);
- sk_write(s, &z, 1);
+ char z = 0;
+ char *p;
+ sk_write(s, &z, 1);
+ sk_write(s, cfg.localusername, strlen(cfg.localusername));
+ sk_write(s, &z, 1);
+ sk_write(s, cfg.username, strlen(cfg.username));
+ sk_write(s, &z, 1);
+ sk_write(s, cfg.termtype, strlen(cfg.termtype));
+ sk_write(s, "/", 1);
+ for (p = cfg.termspeed; isdigit(*p); p++);
+ sk_write(s, cfg.termspeed, p - cfg.termspeed);
+ rlogin_bufsize = sk_write(s, &z, 1);
}
- begin_session();
-
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;
- sk_write(s, buf, len);
+ rlogin_bufsize = sk_write(s, buf, len);
+
+ return rlogin_bufsize;
+}
+
+/*
+ * Called to query the current socket sendability status.
+ */
+static int rlogin_sendbuffer(void)
+{
+ return rlogin_bufsize;
}
/*
* Called to set the size of the window
*/
-static void rlogin_size(void) {
+static void rlogin_size(void)
+{
char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
- b[6] = cols >> 8; b[7] = cols & 0xFF;
- b[4] = rows >> 8; b[5] = rows & 0xFF;
- sk_write(s, b, 12);
+ b[6] = cols >> 8;
+ b[7] = cols & 0xFF;
+ b[4] = rows >> 8;
+ b[5] = rows & 0xFF;
+ rlogin_bufsize = sk_write(s, b, 12);
return;
}
/*
* Send rlogin special codes.
*/
-static void rlogin_special (Telnet_Special code) {
+static void rlogin_special(Telnet_Special code)
+{
/* Do nothing! */
return;
}
-static Socket rlogin_socket(void) { return s; }
+static Socket rlogin_socket(void)
+{
+ return s;
+}
-static int rlogin_sendok(void) { return 1; }
+static int rlogin_sendok(void)
+{
+ 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
};
projects / u / mdw / putty / blobdiff