dhcpcd: Update to Version 5.2.10

Change-Id: I949331c7aad91b125decd51da4041983d3a352bc
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/duid.c b/duid.c
new file mode 100644
index 0000000..d67e45e
--- /dev/null
+++ b/duid.c
@@ -0,0 +1,100 @@
+/* 
+ * dhcpcd - DHCP client daemon
+ * Copyright (c) 2006-2008 Roy Marples <roy@marples.name>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#define THIRTY_YEARS_IN_SECONDS    946707779
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "duid.h"
+#include "net.h"
+
+size_t
+get_duid(unsigned char *duid, const struct interface *iface)
+{
+	FILE *f;
+	uint16_t type = 0;
+	uint16_t hw = 0;
+	uint32_t ul;
+	time_t t;
+	int x = 0;
+	unsigned char *p = duid;
+	size_t len = 0;
+	char *line;
+
+	/* If we already have a DUID then use it as it's never supposed
+	 * to change once we have one even if the interfaces do */
+	if ((f = fopen(DUID, "r"))) {
+		while ((line = get_line(f))) {
+			len = hwaddr_aton(NULL, line);
+			if (len && len <= DUID_LEN) {
+				hwaddr_aton(duid, line);
+				break;
+			}
+			len = 0;
+		}
+		fclose(f);
+		if (len)
+			return len;
+	} else {
+		if (errno != ENOENT)
+			return 0;
+	}
+
+	/* No file? OK, lets make one based on our interface */
+	if (!(f = fopen(DUID, "w")))
+		return 0;
+	type = htons(1); /* DUI-D-LLT */
+	memcpy(p, &type, 2);
+	p += 2;
+	hw = htons(iface->family);
+	memcpy(p, &hw, 2);
+	p += 2;
+	/* time returns seconds from jan 1 1970, but DUID-LLT is
+	 * seconds from jan 1 2000 modulo 2^32 */
+	t = time(NULL) - THIRTY_YEARS_IN_SECONDS;
+	ul = htonl(t & 0xffffffff);
+	memcpy(p, &ul, 4);
+	p += 4;
+	/* Finally, add the MAC address of the interface */
+	memcpy(p, iface->hwaddr, iface->hwlen);
+	p += iface->hwlen;
+	len = p - duid;
+	x = fprintf(f, "%s\n", hwaddr_ntoa(duid, len));
+	fclose(f);
+	/* Failed to write the duid? scrub it, we cannot use it */
+	if (x < 1) {
+		len = 0;
+		unlink(DUID);
+	}
+	return len;
+}