Properly hide IPv4 only variables and functions under #ifdef INET.

sys/netipsec/ipsec.c

@@ -1702,6 +1702,7 @@ vshiftl(unsigned char *bitmap, int nbit, int wsize)
 	}
 }
 
+#ifdef INET
 /* Return a printable string for the IPv4 address. */
 static char *
 inet_ntoa4(struct in_addr ina)
@@ -1716,6 +1717,7 @@ inet_ntoa4(struct in_addr ina)
 	    ucp[2] & 0xff, ucp[3] & 0xff);
 	return (buf[i]);
 }
+#endif
 
 /* Return a printable string for the address. */
 char *

sys/netipsec/ipsec_input.c

@@ -103,7 +103,9 @@
 #define IPSEC_ISTAT(p,x,y,z) ((p) == IPPROTO_ESP ? (x)++ : \
 			    (p) == IPPROTO_AH ? (y)++ : (z)++)
 
+#ifdef INET
 static void ipsec4_common_ctlinput(int, struct sockaddr *, void *, int);
+#endif
 
 /*
  * ipsec_common_input gets called when an IPsec-protected packet

sys/netipsec/xform_ipip.c

@@ -171,7 +171,9 @@ _ipip_input(struct mbuf *m, int iphlen, struct ifnet *gifp)
 {
 	INIT_VNET_NET(curvnet);
 	INIT_VNET_IPSEC(curvnet);
+#ifdef INET
 	register struct sockaddr_in *sin;
+#endif
 	register struct ifnet *ifp;
 	register struct ifaddr *ifa;
 	struct ip *ipo;