NetBSD support for multiple data link types on an interface, from David

Young <dyoung@ojctech.com>, with some minor changes by Jason R. Thorpe
<thorpej@netbsd.org>, and further changes by me to:

	use "-y" rather than "-D" to set the link type ("-D" was already
	taken);

	use libpcap APIs to map between data link type names and values;

	supply stub versions of missing-but-needed libpcap APIs.

Update Jason Thorpe's e-mail address (Zembu is going away, if it hasn't
done so already).

2 files changed, 211 insertions, 0 deletions

diff --git a/missing/datalinks.c b/missing/datalinks.c
new file mode 100644
index 00000000..64996971
--- /dev/null
+++ b/missing/datalinks.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998
+ *	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 Computer Systems
+ *	Engineering Group at Lawrence Berkeley Laboratory.
+ * 4. Neither the name of the University nor of the Laboratory 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.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+    "@(#) $Header: /tcpdump/master/tcpdump/missing/datalinks.c,v 1.1 2002-12-19 09:27:58 guy Exp $ (LBL)";
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <pcap.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "pcap-missing.h"
+
+/*
+ * Stub versions for platforms that don't support them.
+ */
+int
+pcap_list_datalinks(pcap_t *p, int **dlt_buffer)
+{
+	/*
+	 * This platform doesn't support changing the DLT for an
+	 * interface.  Return a list of DLTs containing only the
+	 * DLT this device supports.
+	 */
+	*dlt_buffer = (int*)malloc(sizeof(**dlt_buffer));
+	if (*dlt_buffer == NULL)
+		return (-1);
+	**dlt_buffer = pcap_datalink(p);
+	return (1);
+}
diff --git a/missing/dlnames.c b/missing/dlnames.c
new file mode 100644
index 00000000..1dd100a4
--- /dev/null
+++ b/missing/dlnames.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998
+ *	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 Computer Systems
+ *	Engineering Group at Lawrence Berkeley Laboratory.
+ * 4. Neither the name of the University nor of the Laboratory 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.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+    "@(#) $Header: /tcpdump/master/tcpdump/missing/dlnames.c,v 1.1 2002-12-19 09:27:58 guy Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <pcap.h>
+#include <string.h>
+
+#include "pcap-missing.h"
+
+struct dlt_choice {
+	const char *name;
+	int	dlt;
+};
+
+#define DLT_CHOICE(code) { #code, code }
+#define DLT_CHOICE_SENTINEL { NULL, 0 }
+
+static struct dlt_choice dlt_choices[] = {
+	DLT_CHOICE(DLT_ARCNET),
+	DLT_CHOICE(DLT_EN10MB),
+	DLT_CHOICE(DLT_SLIP),
+	DLT_CHOICE(DLT_SLIP_BSDOS),
+	DLT_CHOICE(DLT_NULL),
+#ifdef DLT_LOOP
+	DLT_CHOICE(DLT_LOOP),
+#endif
+	DLT_CHOICE(DLT_PPP),
+#ifdef DLT_C_HDLC
+	DLT_CHOICE(DLT_C_HDLC),
+#endif
+#ifdef DLT_PPP_SERIAL
+	DLT_CHOICE(DLT_PPP_SERIAL),
+#endif
+#ifdef DLT_PPP_ETHER
+	DLT_CHOICE(DLT_PPP_ETHER),
+#endif
+	DLT_CHOICE(DLT_PPP_BSDOS),
+	DLT_CHOICE(DLT_FDDI),
+	DLT_CHOICE(DLT_IEEE802),
+#ifdef DLT_IEEE802_11
+	DLT_CHOICE(DLT_IEEE802_11),
+#endif
+#ifdef DLT_PRISM_HEADER
+	DLT_CHOICE(DLT_PRISM_HEADER),
+#endif
+#ifdef DLT_IEEE802_11_RADIO
+	DLT_CHOICE(DLT_IEEE802_11_RADIO),
+#endif
+	DLT_CHOICE(DLT_ATM_RFC1483),
+#ifdef DLT_ATM_CLIP
+	DLT_CHOICE(DLT_ATM_CLIP),
+#endif
+#ifdef DLT_SUNATM
+	DLT_CHOICE(DLT_SUNATM),
+#endif
+	DLT_CHOICE(DLT_RAW),
+#ifdef DLT_LINUX_SLL
+	DLT_CHOICE(DLT_LINUX_SLL),
+#endif
+#ifdef DLT_LTALK
+	DLT_CHOICE(DLT_LTALK),
+#endif
+#ifdef DLT_IP_OVER_FC
+	DLT_CHOICE(DLT_IP_OVER_FC),
+#endif
+#ifdef DLT_FRELAY
+	DLT_CHOICE(DLT_FRELAY),
+#endif
+
+#ifdef DLT_LANE8023
+	DLT_CHOICE(DLT_LANE8023),
+#endif
+#ifdef DLT_CIP
+	DLT_CHOICE(DLT_CIP),
+#endif
+#ifdef DLT_HDLC
+	DLT_CHOICE(DLT_HDLC),
+#endif
+#ifdef DLT_PFLOG
+	DLT_CHOICE(DLT_PFLOG),
+#endif
+	DLT_CHOICE_SENTINEL
+};
+
+int
+pcap_datalink_name_to_val(const char *name)
+{
+	int i;
+
+	for (i = 0; dlt_choices[i].name != NULL; i++) {
+		if (strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
+		    name) == 0)
+			return (dlt_choices[i].dlt);
+	}
+	return (-1);
+}
+
+const char *
+pcap_datalink_val_to_name(int dlt)
+{
+	int i;
+
+	for (i = 0; dlt_choices[i].name != NULL; i++) {
+		if (dlt_choices[i].dlt == dlt)
+			return (dlt_choices[i].name + sizeof("DLT_") - 1);
+	}
+	return (NULL);
+}