Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 158 insertions, 0 deletions

diff --git a/print-enc.c b/print-enc.c
new file mode 100644
index 0000000..928b02c
--- /dev/null
+++ b/print-enc.c
@@ -0,0 +1,158 @@
+/*	$OpenBSD: print-enc.c,v 1.7 2002/02/19 19:39:40 millert Exp $	*/
+
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
+ *	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: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: OpenBSD IPsec encapsulation BPF layer printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+#include "af.h"
+
+/* From $OpenBSD: if_enc.h,v 1.8 2001/06/25 05:14:00 angelos Exp $ */
+/*
+ * The authors of this code are John Ioannidis (ji@tla.org),
+ * Angelos D. Keromytis (kermit@csd.uch.gr) and
+ * Niels Provos (provos@physnet.uni-hamburg.de).
+ *
+ * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
+ * in November 1995.
+ *
+ * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
+ * by Angelos D. Keromytis.
+ *
+ * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
+ * and Niels Provos.
+ *
+ * Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
+ * and Niels Provos.
+ * Copyright (c) 2001, Angelos D. Keromytis.
+ *
+ * Permission to use, copy, and modify this software with or without fee
+ * is hereby granted, provided that this entire notice is included in
+ * all copies of any software which is or includes a copy or
+ * modification of this software.
+ * You may use this code under the GNU public license if you so wish. Please
+ * contribute changes back to the authors under this freer than GPL license
+ * so that we may further the use of strong encryption without limitations to
+ * all.
+ *
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
+ * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
+ * PURPOSE.
+ */
+
+#define ENC_HDRLEN	12
+
+/* From $OpenBSD: mbuf.h,v 1.56 2002/01/25 15:50:23 art Exp $	*/
+#define M_CONF		0x0400  /* packet was encrypted (ESP-transport) */
+#define M_AUTH		0x0800  /* packet was authenticated (AH) */
+
+struct enchdr {
+	nd_uint32_t af;
+	nd_uint32_t spi;
+	nd_uint32_t flags;
+};
+
+#define ENC_PRINT_TYPE(wh, xf, name) \
+	if ((wh) & (xf)) { \
+		ND_PRINT("%s%s", name, (wh) == (xf) ? "): " : ","); \
+		(wh) &= ~(xf); \
+	}
+
+/*
+ * Byte-swap a 32-bit number.
+ * ("htonl()" or "ntohl()" won't work - we want to byte-swap even on
+ * big-endian platforms.)
+ */
+#define	SWAPLONG(y) \
+((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
+
+void
+enc_if_print(netdissect_options *ndo,
+             const struct pcap_pkthdr *h, const u_char *p)
+{
+	u_int length = h->len;
+	u_int af, flags;
+	const struct enchdr *hdr;
+
+	ndo->ndo_protocol = "enc";
+	ND_TCHECK_LEN(p, ENC_HDRLEN);
+	ndo->ndo_ll_hdr_len += ENC_HDRLEN;
+
+	hdr = (const struct enchdr *)p;
+	/*
+	 * The address family and flags fields are in the byte order
+	 * of the host that originally captured the traffic.
+	 *
+	 * To determine that, look at the address family.  It's 32-bit,
+	 * it is not likely ever to be > 65535 (I doubt there will
+	 * ever be > 65535 address families and, so far, AF_ values have
+	 * not been allocated very sparsely) so it should not have the
+	 * upper 16 bits set, and it is not likely ever to be AF_UNSPEC,
+	 * i.e. it's not likely ever to be 0, so if it's byte-swapped,
+	 * it should have at least one of the upper 16 bits set.
+	 *
+	 * So if any of the upper 16 bits are set, we assume it, and
+	 * the flags field, are byte-swapped.
+	 *
+	 * The SPI field is always in network byte order, i.e. big-
+	 * endian.
+	 */
+	UNALIGNED_MEMCPY(&af, &hdr->af, sizeof (af));
+	UNALIGNED_MEMCPY(&flags, &hdr->flags, sizeof (flags));
+	if ((af & 0xFFFF0000) != 0) {
+		af = SWAPLONG(af);
+		flags = SWAPLONG(flags);
+	}
+
+	if (flags == 0)
+		ND_PRINT("(unprotected): ");
+	else
+		ND_PRINT("(");
+	ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
+	ENC_PRINT_TYPE(flags, M_CONF, "confidential");
+	/* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
+	ND_PRINT("SPI 0x%08x: ", GET_BE_U_4(hdr->spi));
+
+	length -= ENC_HDRLEN;
+	p += ENC_HDRLEN;
+
+	switch (af) {
+	case BSD_AFNUM_INET:
+		ip_print(ndo, p, length);
+		break;
+	case BSD_AFNUM_INET6_BSD:
+	case BSD_AFNUM_INET6_FREEBSD:
+	case BSD_AFNUM_INET6_DARWIN:
+		ip6_print(ndo, p, length);
+		break;
+	}
+}