initial import of NetBSD tree

1 files changed, 175 insertions, 0 deletions

diff --git a/lib/libpcap/pcap.c b/lib/libpcap/pcap.c
new file mode 100644
index 00000000000..a59f65a127d
--- /dev/null
+++ b/lib/libpcap/pcap.c
@@ -0,0 +1,175 @@
+/*	$NetBSD: pcap.c,v 1.2 1995/03/06 11:39:05 mycroft Exp $	*/
+
+/*
+ * Copyright (c) 1993, 1994
+ *	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 char rcsid[] =
+    "@(#) Header: pcap.c,v 1.12 94/06/12 14:32:23 leres Exp (LBL)";
+#endif
+
+#include <sys/types.h>
+
+#include <string.h>
+#include <unistd.h>
+
+#include "pcap-int.h"
+
+int
+pcap_dispatch(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
+{
+	if (p->sf.rfile != NULL)
+		return (pcap_offline_read(p, cnt, callback, user));
+	else
+		return (pcap_read(p, cnt, callback, user));
+}
+
+int
+pcap_loop(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
+{
+	for (;;) {
+		int n = pcap_dispatch(p, cnt, callback, user);
+		if (n < 0)
+			return (n);
+		if (cnt > 0) {
+			cnt -= n;
+			if (cnt <= 0)
+				return (0);
+		}
+	}
+}
+
+struct singleton {
+	struct pcap_pkthdr *hdr;
+	const u_char *pkt;
+};
+
+
+static void
+pcap_oneshot(u_char *userData, const struct pcap_pkthdr *h, const u_char *pkt)
+{
+	struct singleton *sp = (struct singleton *)userData;
+	*sp->hdr = *h;
+	sp->pkt = pkt;
+}
+
+const u_char *
+pcap_next(pcap_t *p, struct pcap_pkthdr *h)
+{
+	struct singleton s;
+
+	s.hdr = h;
+	if (pcap_dispatch(p, 1, pcap_oneshot, (u_char*)&s) < 0)
+		return (0);
+	return (s.pkt);
+}
+
+int
+pcap_datalink(pcap_t *p)
+{
+	return (p->linktype);
+}
+
+int
+pcap_snapshot(pcap_t *p)
+{
+	return (p->snapshot);
+}
+
+int
+pcap_is_swapped(pcap_t *p)
+{
+	return (p->sf.swapped);
+}
+
+int
+pcap_major_version(pcap_t *p)
+{
+	return (p->sf.version_major);
+}
+
+int
+pcap_minor_version(pcap_t *p)
+{
+	return (p->sf.version_minor);
+}
+
+FILE *
+pcap_file(pcap_t *p)
+{
+	return (p->sf.rfile);
+}
+
+int
+pcap_fileno(pcap_t *p)
+{
+	return (p->fd);
+}
+
+void
+pcap_perror(pcap_t *p, char *prefix)
+{
+	fprintf(stderr, "%s: %s\n", prefix, p->errbuf);
+}
+
+char *
+pcap_geterr(pcap_t *p)
+{
+	return (p->errbuf);
+}
+
+/*
+ * Not all systems have strerror().
+ */
+char *
+pcap_strerror(int errnum)
+{
+
+	return (strerror(errnum));
+}
+
+void
+pcap_close(pcap_t *p)
+{
+	/*XXX*/
+	if (p->fd >= 0)
+		close(p->fd);
+	if (p->sf.rfile != NULL) {
+		fclose(p->sf.rfile);
+		if (p->sf.base != NULL)
+			free(p->sf.base);
+	} else if (p->buffer != NULL)
+		free(p->buffer);
+	
+	free(p);
+}