lib/hmac.c: Add missing include.

[irc/quakenet/newserv.git] / lib / irc_ipv6.c

diff --git a/lib/irc_ipv6.c b/lib/irc_ipv6.c
index 23720a3629902049549d8c575ea0d7f0cbc2c28d..8123685979401db2db6046f407c1a13fcf76c2e7 100644 (file)
--- a/lib/irc_ipv6.c
+++ b/lib/irc_ipv6.c
@@ -106,12 +106,14 @@ ircd_aton_ip4(const char *input, unsigned int *output, unsigned char *pbits)
       *pbits = bits;
     return pos;
   case '.':
+    if (++dots > 3)
+      return 0;
     if (input[++pos] == '.')
       return 0;
-    ip |= part << (24 - 8 * dots++);
+    ip |= part << (32 - 8 * dots);
     part = 0;
     if (input[pos] == '*') {
-      while (input[++pos] == '*') ;
+      while (input[++pos] == '*' || input[pos] == '.') ;
       if (input[pos] != '\0')
         return 0;
       if (pbits)
@@ -229,7 +231,7 @@ ipmask_parse(const char *input, struct irc_in_addr *ip, unsigned char *pbits)
       *pbits = part;
       goto finish;
     case '*':
-      while (input[++pos] == '*') ;
+      while (input[++pos] == '*' || input[pos] == ':') ;
       if (input[pos] != '\0' || colon < 8)
         return 0;
       if (pbits)
@@ -245,6 +247,8 @@ ipmask_parse(const char *input, struct irc_in_addr *ip, unsigned char *pbits)
     default:
       return 0;
     }
+    if (input[pos] != '\0')
+      return 0;
   finish:
     if (colon < 8) {
       unsigned int jj;
@@ -462,3 +466,24 @@ void base64toip(const char* input, struct irc_in_addr* addr)
   }
 }
 
+/** Test whether an address matches the most significant bits of a mask.
+ * @param[in] addr Address to test.
+ * @param[in] mask Address to test against.
+ * @param[in] bits Number of bits to test.
+ * @return 0 on mismatch, 1 if bits < 128 and all bits match; -1 if
+ * bits == 128 and all bits match.
+ */
+int ipmask_check(const struct irc_in_addr *addr, const struct irc_in_addr *mask, unsigned char bits)
+{
+  int k;
+
+  for (k = 0; k < 8; k++) {
+    if (bits < 16)
+      return !(htons(addr->in6_16[k] ^ mask->in6_16[k]) >> (16-bits));
+    if (addr->in6_16[k] != mask->in6_16[k])
+      return 0;
+    if (!(bits -= 16))
+      return 1;
+  }
+  return -1;
+}