New upstream version 2.4.0upstream/2.4.0

1 files changed, 88 insertions, 72 deletions

diff --git a/src/openvpn/proto.c b/src/openvpn/proto.c
index 7b58e6a..40e0714 100644
--- a/src/openvpn/proto.c
+++ b/src/openvpn/proto.c
@@ -5,7 +5,7 @@
  *             packet encryption, packet authentication, and
  *             packet compression.
  *
- *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *  Copyright (C) 2002-2017 OpenVPN Technologies, Inc. <sales@openvpn.net>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2
@@ -41,48 +41,60 @@
  */
 static
 bool
-is_ipv_X ( int tunnel_type, struct buffer *buf, int ip_ver )
+is_ipv_X( int tunnel_type, struct buffer *buf, int ip_ver )
 {
-  int offset;
-  const struct openvpn_iphdr *ih;
+    int offset;
+    const struct openvpn_iphdr *ih;
 
-  verify_align_4 (buf);
-  if (tunnel_type == DEV_TYPE_TUN)
+    verify_align_4(buf);
+    if (tunnel_type == DEV_TYPE_TUN)
     {
-      if (BLEN (buf) < (int) sizeof (struct openvpn_iphdr))
-	return false;
-      offset = 0;
+        if (BLEN(buf) < (int) sizeof(struct openvpn_iphdr))
+        {
+            return false;
+        }
+        offset = 0;
     }
-  else if (tunnel_type == DEV_TYPE_TAP)
+    else if (tunnel_type == DEV_TYPE_TAP)
     {
-      const struct openvpn_ethhdr *eh;
-      if (BLEN (buf) < (int)(sizeof (struct openvpn_ethhdr)
-	  + sizeof (struct openvpn_iphdr)))
-	return false;
-      eh = (const struct openvpn_ethhdr *) BPTR (buf);
-      if (ntohs (eh->proto) != (ip_ver == 6 ? OPENVPN_ETH_P_IPV6 : OPENVPN_ETH_P_IPV4))
-	return false;
-      offset = sizeof (struct openvpn_ethhdr);
+        const struct openvpn_ethhdr *eh;
+        if (BLEN(buf) < (int)(sizeof(struct openvpn_ethhdr)
+                              + sizeof(struct openvpn_iphdr)))
+        {
+            return false;
+        }
+        eh = (const struct openvpn_ethhdr *) BPTR(buf);
+        if (ntohs(eh->proto) != (ip_ver == 6 ? OPENVPN_ETH_P_IPV6 : OPENVPN_ETH_P_IPV4))
+        {
+            return false;
+        }
+        offset = sizeof(struct openvpn_ethhdr);
+    }
+    else
+    {
+        return false;
     }
-  else
-    return false;
 
-  ih = (const struct openvpn_iphdr *) (BPTR (buf) + offset);
+    ih = (const struct openvpn_iphdr *) (BPTR(buf) + offset);
 
-  /* IP version is stored in the same bits for IPv4 or IPv6 header */
-  if (OPENVPN_IPH_GET_VER (ih->version_len) == ip_ver)
-    return buf_advance (buf, offset);
-  else
-    return false;
+    /* IP version is stored in the same bits for IPv4 or IPv6 header */
+    if (OPENVPN_IPH_GET_VER(ih->version_len) == ip_ver)
+    {
+        return buf_advance(buf, offset);
+    }
+    else
+    {
+        return false;
+    }
 }
 
 bool
-is_ipv4 (int tunnel_type, struct buffer *buf)
+is_ipv4(int tunnel_type, struct buffer *buf)
 {
     return is_ipv_X( tunnel_type, buf, 4 );
 }
 bool
-is_ipv6 (int tunnel_type, struct buffer *buf)
+is_ipv6(int tunnel_type, struct buffer *buf)
 {
     return is_ipv_X( tunnel_type, buf, 6 );
 }
@@ -90,52 +102,56 @@ is_ipv6 (int tunnel_type, struct buffer *buf)
 #ifdef PACKET_TRUNCATION_CHECK
 
 void
-ipv4_packet_size_verify (const uint8_t *data,
-			 const int size,
-			 const int tunnel_type,
-			 const char *prefix,
-			 counter_type *errors)
+ipv4_packet_size_verify(const uint8_t *data,
+                        const int size,
+                        const int tunnel_type,
+                        const char *prefix,
+                        counter_type *errors)
 {
-  if (size > 0)
+    if (size > 0)
     {
-      struct buffer buf;
-
-      buf_set_read (&buf, data, size);
-
-      if (is_ipv4 (tunnel_type, &buf))
-	{
-	  const struct openvpn_iphdr *pip;
-	  int hlen;
-	  int totlen;
-	  const char *msgstr = "PACKET SIZE INFO";
-	  unsigned int msglevel = D_PACKET_TRUNC_DEBUG;
-
-	  if (BLEN (&buf) < (int) sizeof (struct openvpn_iphdr))
-	    return;
-  
-	  verify_align_4 (&buf);
-	  pip = (struct openvpn_iphdr *) BPTR (&buf);
-	  
-	  hlen = OPENVPN_IPH_GET_LEN (pip->version_len);
-	  totlen = ntohs (pip->tot_len);
-	  
-	  if (BLEN (&buf) != totlen)
-	    {
-	      msgstr = "PACKET TRUNCATION ERROR";
-	      msglevel = D_PACKET_TRUNC_ERR;
-	      if (errors)
-		++(*errors);
-	    }
-
-	  msg (msglevel, "%s %s: size=%d totlen=%d hlen=%d errcount=" counter_format,
-	       msgstr,
-	       prefix,
-	       BLEN (&buf),
-	       totlen,
-	       hlen,
-	       errors ? *errors : (counter_type)0);
-	}
+        struct buffer buf;
+
+        buf_set_read(&buf, data, size);
+
+        if (is_ipv4(tunnel_type, &buf))
+        {
+            const struct openvpn_iphdr *pip;
+            int hlen;
+            int totlen;
+            const char *msgstr = "PACKET SIZE INFO";
+            unsigned int msglevel = D_PACKET_TRUNC_DEBUG;
+
+            if (BLEN(&buf) < (int) sizeof(struct openvpn_iphdr))
+            {
+                return;
+            }
+
+            verify_align_4(&buf);
+            pip = (struct openvpn_iphdr *) BPTR(&buf);
+
+            hlen = OPENVPN_IPH_GET_LEN(pip->version_len);
+            totlen = ntohs(pip->tot_len);
+
+            if (BLEN(&buf) != totlen)
+            {
+                msgstr = "PACKET TRUNCATION ERROR";
+                msglevel = D_PACKET_TRUNC_ERR;
+                if (errors)
+                {
+                    ++(*errors);
+                }
+            }
+
+            msg(msglevel, "%s %s: size=%d totlen=%d hlen=%d errcount=" counter_format,
+                msgstr,
+                prefix,
+                BLEN(&buf),
+                totlen,
+                hlen,
+                errors ? *errors : (counter_type)0);
+        }
     }
 }
 
-#endif
+#endif /* ifdef PACKET_TRUNCATION_CHECK */