X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=x11fwd.c;h=6cfec72824304b8e853802b599c12ed932802a91;hb=9f9d72ec58642e91b4f93ee4405a8086ee2fb2f0;hp=ce572f69a274e3ecd0b5df88d6b91f157ea1a9c3;hpb=bb78583ad29084f16db994d66895917e1b20346e;p=PuTTY.git

diff --git a/x11fwd.c b/x11fwd.c
index ce572f69..6cfec728 100644
--- a/x11fwd.c
+++ b/x11fwd.c
@@ -190,7 +190,7 @@ int x11_authcmp(void *av, void *bv)
     }
 }
 
-struct X11Display *x11_setup_display(char *display, Conf *conf)
+struct X11Display *x11_setup_display(const char *display, Conf *conf)
 {
     struct X11Display *disp = snew(struct X11Display);
     char *localcopy;
@@ -230,7 +230,7 @@ struct X11Display *x11_setup_display(char *display, Conf *conf)
 	char *colon, *dot, *slash;
 	char *protocol, *hostname;
 
-	colon = strrchr(localcopy, ':');
+	colon = host_strrchr(localcopy, ':');
 	if (!colon) {
 	    sfree(disp);
 	    sfree(localcopy);
@@ -357,10 +357,10 @@ void x11_free_display(struct X11Display *disp)
 
 #define XDM_MAXSKEW 20*60      /* 20 minute clock skew should be OK */
 
-static char *x11_verify(unsigned long peer_ip, int peer_port,
-			tree234 *authtree, char *proto,
-			unsigned char *data, int dlen,
-                        struct X11FakeAuth **auth_ret)
+static const char *x11_verify(unsigned long peer_ip, int peer_port,
+                              tree234 *authtree, char *proto,
+                              unsigned char *data, int dlen,
+                              struct X11FakeAuth **auth_ret)
 {
     struct X11FakeAuth match_dummy;    /* for passing to find234 */
     struct X11FakeAuth *auth;
@@ -420,7 +420,8 @@ static char *x11_verify(unsigned long peer_ip, int peer_port,
 	    if (data[i] != 0)	       /* zero padding wrong */
 		return "XDM-AUTHORIZATION-1 data failed check";
 	tim = time(NULL);
-	if (abs(t - tim) > XDM_MAXSKEW)
+	if (((unsigned long)t - (unsigned long)tim
+             + XDM_MAXSKEW) > 2*XDM_MAXSKEW)
 	    return "XDM-AUTHORIZATION-1 time stamp was too far out";
 	seen = snew(struct XDMSeen);
 	seen->time = t;
@@ -677,7 +678,7 @@ int x11_get_screen_number(char *display)
 {
     int n;
 
-    n = strcspn(display, ":");
+    n = host_strcspn(display, ":");
     if (!display[n])
 	return 0;
     n = strcspn(display, ".");