X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=rlogin.c;h=d73f7f9f97b7349025f1c566672178f5c63b5b7c;hb=0014ffb70c9ed234984595d6c9ca3b5c175996aa;hp=7cfe7837a962f53c80d12e664be7320a7faed19f;hpb=a1f3b7a358adaa7c2a98359cd0373aa823eeb14b;p=PuTTY.git

diff --git a/rlogin.c b/rlogin.c
index 7cfe7837..d73f7f9f 100644
--- a/rlogin.c
+++ b/rlogin.c
@@ -4,6 +4,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <limits.h>
 #include <ctype.h>
 
 #include "putty.h"
@@ -22,6 +23,7 @@ typedef struct rlogin_tag {
     /* the above field _must_ be first in the structure */
 
     Socket s;
+    int closed_on_socket_error;
     int bufsize;
     int firstbyte;
     int cansize;
@@ -56,15 +58,25 @@ static void rlogin_log(Plug plug, int type, SockAddr addr, int port,
 	msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg);
 
     logevent(rlogin->frontend, msg);
+    sfree(msg);
 }
 
 static int rlogin_closing(Plug plug, const char *error_msg, int error_code,
 			  int calling_back)
 {
     Rlogin rlogin = (Rlogin) plug;
+
+    /*
+     * We don't implement independent EOF in each direction for Telnet
+     * connections; as soon as we get word that the remote side has
+     * sent us EOF, we wind up the whole connection.
+     */
+
     if (rlogin->s) {
         sk_close(rlogin->s);
         rlogin->s = NULL;
+        if (error_msg)
+            rlogin->closed_on_socket_error = TRUE;
 	notify_remote_exit(rlogin->frontend);
     }
     if (error_msg) {
@@ -149,7 +161,7 @@ static void rlogin_startup(Rlogin rlogin, const char *ruser)
  */
 static const char *rlogin_init(void *frontend_handle, void **backend_handle,
 			       Conf *conf,
-			       char *host, int port, char **realhost,
+			       const char *host, int port, char **realhost,
 			       int nodelay, int keepalive)
 {
     static const struct plug_function_table fn_table = {
@@ -168,6 +180,7 @@ static const char *rlogin_init(void *frontend_handle, void **backend_handle,
     rlogin = snew(struct rlogin_tag);
     rlogin->fn = &fn_table;
     rlogin->s = NULL;
+    rlogin->closed_on_socket_error = FALSE;
     rlogin->frontend = frontend_handle;
     rlogin->term_width = conf_get_int(conf, CONF_width);
     rlogin->term_height = conf_get_int(conf, CONF_height);
@@ -213,15 +226,10 @@ static const char *rlogin_init(void *frontend_handle, void **backend_handle,
 
 	sfree(*realhost);
 	*realhost = dupstr(loghost);
-	colon = strrchr(*realhost, ':');
-	if (colon) {
-	    /*
-	     * FIXME: if we ever update this aspect of ssh.c for
-	     * IPv6 literal management, this should change in line
-	     * with it.
-	     */
+
+	colon = host_strrchr(*realhost, ':');
+	if (colon)
 	    *colon++ = '\0';
-	}
     }
 
     /*
@@ -230,7 +238,7 @@ static const char *rlogin_init(void *frontend_handle, void **backend_handle,
      * in which case we prompt for it and may end up deferring doing
      * anything else until the local prompt mechanism returns.
      */
-    if ((ruser = get_remote_username(conf)) == NULL) {
+    if ((ruser = get_remote_username(conf)) != NULL) {
         rlogin_startup(rlogin, ruser);
         sfree(ruser);
     } else {
@@ -239,8 +247,7 @@ static const char *rlogin_init(void *frontend_handle, void **backend_handle,
         rlogin->prompt = new_prompts(rlogin->frontend);
         rlogin->prompt->to_server = TRUE;
         rlogin->prompt->name = dupstr("Rlogin login name");
-        /* 512 is an arbitrary limit :-( */
-        add_prompt(rlogin->prompt, dupstr("rlogin username: "), TRUE, 512); 
+        add_prompt(rlogin->prompt, dupstr("rlogin username: "), TRUE); 
         ret = get_userpass_input(rlogin->prompt, NULL, 0);
         if (ret >= 0) {
             rlogin_startup(rlogin, rlogin->prompt->prompts[0]->result);
@@ -272,7 +279,7 @@ static void rlogin_reconfig(void *handle, Conf *conf)
 /*
  * Called to send data down the rlogin connection.
  */
-static int rlogin_send(void *handle, char *buf, int len)
+static int rlogin_send(void *handle, const char *buf, int len)
 {
     Rlogin rlogin = (Rlogin) handle;
 
@@ -386,6 +393,8 @@ static int rlogin_exitcode(void *handle)
     Rlogin rlogin = (Rlogin) handle;
     if (rlogin->s != NULL)
         return -1;                     /* still connected */
+    else if (rlogin->closed_on_socket_error)
+        return INT_MAX;     /* a socket error counts as an unclean exit */
     else
         /* If we ever implement RSH, we'll probably need to do this properly */
         return 0;
@@ -416,6 +425,7 @@ Backend rlogin_backend = {
     rlogin_provide_logctx,
     rlogin_unthrottle,
     rlogin_cfg_info,
+    NULL /* test_for_upstream */,
     "rlogin",
     PROT_RLOGIN,
     513