9832 Original bug discovered as 9560 has friends IPv4 packets coming in as IPv6 creating chaos
Reviewed by: Robert Mustacchi <rm@joyent.com>

@@ -18,11 +18,11 @@
  *
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2017, Joyent, Inc.
+ * Copyright (c) 2019, Joyent, Inc.
  */
 
 #ifndef _SYS_MAC_IMPL_H
 #define _SYS_MAC_IMPL_H
 

@@ -721,11 +721,11 @@
 
 extern void     mac_init(void);
 extern int      mac_fini(void);
 
 extern void     mac_ndd_ioctl(mac_impl_t *, queue_t *, mblk_t *);
-extern boolean_t mac_ip_hdr_length_v6(ip6_t *, uint8_t *, uint16_t *,
+extern int mac_ip_hdr_length_v6(ip6_t *, uint8_t *, uint16_t *,
     uint8_t *, ip6_frag_t **);
 
 extern mblk_t *mac_copymsgchain_cksum(mblk_t *);
 extern mblk_t *mac_fix_cksum(mblk_t *);
 extern void mac_packet_print(mac_handle_t, mblk_t *);