- rediffed

[packages/tcp_wrappers.git] / tcp_wrappers-bug17847.patch

diff -Nru tcp_wrappers_7.6/hosts_access.5 tcp_wrappers_7.6.new/hosts_access.5
--- tcp_wrappers_7.6/hosts_access.5	Thu Feb  8 07:47:40 2001
+++ tcp_wrappers_7.6.new/hosts_access.5	Thu Feb  8 07:47:18 2001
@@ -102,6 +102,10 @@
 zero or more lines with zero or more host name or address patterns
 separated by whitespace.  A file name pattern can be used anywhere
 a host name or address pattern can be used.
+.IP \(bu
+Wildcards `*\' and `?\' can be used to match hostnames or IP addresses.  This
+method of matching cannot be used in conjunction with `net/mask\' matching,
+hostname matching beginning with `.\' or IP address matching ending with `.\'.
 .SH WILDCARDS
 The access control language supports explicit wildcards:
 .IP ALL
diff -Nru tcp_wrappers_7.6/hosts_access.c tcp_wrappers_7.6.new/hosts_access.c
--- tcp_wrappers_7.6/hosts_access.c	Thu Feb  8 07:47:40 2001
+++ tcp_wrappers_7.6.new/hosts_access.c	Thu Feb  8 07:51:02 2001
@@ -324,6 +324,11 @@
 {
     int     n;
 
+#ifndef DISABLE_WILDCARD_MATCHING
+    if (strchr(tok, '*') || strchr(tok,'?')) {  /* contains '*' or '?' */
+        return (match_pattern_ylo(string,tok)); 	       
+    } else 
+#endif    
 #ifdef INET6
     /* convert IPv4 mapped IPv6 address to IPv4 address */
     if (STRN_EQ(string, "::ffff:", 7)
@@ -425,6 +430,75 @@
     }
     return ((addr & mask) == net);
 }
+
+
+#ifndef DISABLE_WILDCARD_MATCHING
+/* Note: this feature has been adapted in a pretty straightforward way
+   from Tatu Ylonen's last SSH version under free license by 
+   Pekka Savola <pekkas@netcore.fi>.
+
+   Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+*/
+
+/* Returns true if the given string matches the pattern (which may contain
+   ? and * as wildcards), and zero if it does not match. */
+	  
+int match_pattern_ylo(const char *s, const char *pattern)
+{
+  while (1)
+    {
+      /* If at end of pattern, accept if also at end of string. */
+      if (!*pattern)
+        return !*s;
+
+      /* Process '*'. */
+      if (*pattern == '*')
+        {
+	  /* Skip the asterisk. */
+	  pattern++;
+
+	  /* If at end of pattern, accept immediately. */
+          if (!*pattern)
+            return 1;
+
+	  /* If next character in pattern is known, optimize. */
+          if (*pattern != '?' && *pattern != '*')
+            {
+	      /* Look instances of the next character in pattern, and try
+		 to match starting from those. */
+              for (; *s; s++)
+                if (*s == *pattern &&
+                    match_pattern_ylo(s + 1, pattern + 1))
+                  return 1;
+	      /* Failed. */
+              return 0;
+            }
+
+	  /* Move ahead one character at a time and try to match at each
+	     position. */
+          for (; *s; s++)
+            if (match_pattern_ylo(s, pattern))
+              return 1;
+	  /* Failed. */
+          return 0;
+        }
+
+      /* There must be at least one more character in the string.  If we are
+	 at the end, fail. */
+      if (!*s)
+        return 0;
+
+      /* Check if the next character of the string is acceptable. */
+      if (*pattern != '?' && *pattern != *s)
+	return 0;
+      
+      /* Move to the next character, both in string and in pattern. */
+      s++;
+      pattern++;
+    }
+  /*NOTREACHED*/
+}
+#endif /* DISABLE_WILDCARD_MATCHING */
 
 #ifdef INET6
 static int masked_match6(net_tok, mask_tok, string)