Support both "igrp" and "eigrp" in filters.

Use our own header to define IPPROTO_ values, rather than leaving them
up to the OS for which we're building.

Always use IP protocol 9 for "igrp", and use IP protocol 88 for "eigrp".
9 is assigned to "any private Internet gateway protocol", and is mainly
used for Cisco's IGRP.  88 is for Cisco's EIGRP, which is not compatible
on-the-wire with IGRP.

FreeBSD, DragonFly BSD and macOS define IPPROTO_IGRP as 88, rather than
as 9, and their libpcaps use IP protocol 88 for "igrp".  Everybody else
uses IP protocol 9 for "igrp".

Author: guyharris

ipproto.h

@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 1982, 1986, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * From:
+ *	@(#)in.h	8.3 (Berkeley) 1/3/94
+ * $FreeBSD: src/sys/netinet/in.h,v 1.38.2.3 1999/08/29 16:29:34 peter Exp $
+ */
+
+#ifndef IPPROTO_IP
+#define	IPPROTO_IP		0		/* dummy for IP */
+#endif
+#ifndef IPPROTO_HOPOPTS
+#define IPPROTO_HOPOPTS		0		/* IPv6 hop-by-hop options */
+#endif
+#ifndef IPPROTO_ICMP
+#define	IPPROTO_ICMP		1		/* control message protocol */
+#endif
+#ifndef IPPROTO_IGMP
+#define	IPPROTO_IGMP		2		/* group mgmt protocol */
+#endif
+#ifndef IPPROTO_IPV4
+#define IPPROTO_IPV4		4
+#endif
+#ifndef IPPROTO_TCP
+#define	IPPROTO_TCP		6		/* tcp */
+#endif
+#ifndef IPPROTO_EGP
+#define	IPPROTO_EGP		8		/* exterior gateway protocol */
+#endif
+/*
+ * XXX - the current IANA protocol number assignments page lists 9 as
+ * "any private interior gateway (used by Cisco for their IGRP)" and
+ * 88 as "EIGRP" from Cisco.
+ *
+ * Recent FreeBSD and DragonFly BSD <netinet/in.h> headers define
+ * IP_PROTO_IGRP as 9 and IP_PROTO_IGRP as 88.  We define IP_PROTO_PIGP
+ * ("private interior gateway protocol") as 9 and IP_PROTO_EIGRP as 88;
+ * those names* better match what the current protocol number
+ * assignments say.
+ */
+#ifndef IPPROTO_PIGP
+#define IPPROTO_PIGP		9
+#endif
+#ifndef IPPROTO_UDP
+#define	IPPROTO_UDP		17		/* user datagram protocol */
+#endif
+#ifndef IPPROTO_DCCP
+#define	IPPROTO_DCCP		33		/* datagram congestion control protocol */
+#endif
+#ifndef IPPROTO_IPV6
+#define IPPROTO_IPV6		41
+#endif
+#ifndef IPPROTO_ROUTING
+#define IPPROTO_ROUTING		43		/* IPv6 routing header */
+#endif
+#ifndef IPPROTO_FRAGMENT
+#define IPPROTO_FRAGMENT	44		/* IPv6 fragmentation header */
+#endif
+#ifndef IPPROTO_RSVP
+#define IPPROTO_RSVP		46		/* resource reservation */
+#endif
+#ifndef IPPROTO_GRE
+#define	IPPROTO_GRE		47		/* General Routing Encap. */
+#endif
+#ifndef IPPROTO_ESP
+#define	IPPROTO_ESP		50		/* SIPP Encap Sec. Payload */
+#endif
+#ifndef IPPROTO_AH
+#define	IPPROTO_AH		51		/* SIPP Auth Header */
+#endif
+#ifndef IPPROTO_NHRP
+#define IPPROTO_NHRP		54		/* Next Hop Resolution */
+#endif
+#ifndef IPPROTO_MOBILE
+#define IPPROTO_MOBILE		55
+#endif
+#ifndef IPPROTO_ICMPV6
+#define IPPROTO_ICMPV6		58		/* ICMPv6 */
+#endif
+#ifndef IPPROTO_NONE
+#define IPPROTO_NONE		59		/* IPv6 no next header */
+#endif
+#ifndef IPPROTO_DSTOPTS
+#define IPPROTO_DSTOPTS		60		/* IPv6 destination options */
+#endif
+#ifndef IPPROTO_MOBILITY_OLD
+/*
+ * The current Protocol Numbers list says that the IP protocol number for
+ * mobility headers is 135; it cites RFC 6275 (obsoletes RFC 3775).
+ *
+ * It appears that 62 used to be used, even though that's assigned to
+ * a protocol called CFTP; however, the only reference for CFTP is a
+ * Network Message from BBN back in 1982, so, for now, we support 62,
+ * as well as 135, as a protocol number for mobility headers.
+ */
+#define IPPROTO_MOBILITY_OLD	62
+#endif
+#ifndef IPPROTO_ND
+#define	IPPROTO_ND		77		/* Sun net disk proto (temp.) */
+#endif
+#ifndef IPPROTO_EIGRP
+#define	IPPROTO_EIGRP		88		/* Cisco/GXS IGRP */
+#endif
+#ifndef IPPROTO_OSPF
+#define IPPROTO_OSPF		89
+#endif
+#ifndef IPPROTO_PIM
+#define IPPROTO_PIM		103
+#endif
+#ifndef IPPROTO_IPCOMP
+#define IPPROTO_IPCOMP		108
+#endif
+#ifndef IPPROTO_VRRP
+#define IPPROTO_VRRP		112 /* See also CARP. */
+#endif
+#ifndef IPPROTO_CARP
+#define IPPROTO_CARP		112
+#endif
+#ifndef IPPROTO_PGM
+#define IPPROTO_PGM             113
+#endif
+#ifndef IPPROTO_SCTP
+#define IPPROTO_SCTP		132
+#endif
+#ifndef IPPROTO_MOBILITY
+#define IPPROTO_MOBILITY	135
+#endif
+#ifndef IPPROTO_ETHERNET
+#define IPPROTO_ETHERNET	143 /* TEMPORARY - registered 2020-01-31, expires 2021-01-31 */
+#endif