firmware-utils: improve tools for Buffalo DHP series

some of Buffalo DHP series use slightly different trx magic, buffalo-enc,
buffalo-tag, and factory image begin with 'bgn'.

this patch adds support for building those images.

Signed-off-by: FUKAUMI Naoki <naobsd@gmail.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/tools/firmware-utils/src/mkdhpimg.c b/tools/firmware-utils/src/mkdhpimg.c
new file mode 100644
index 0000000000..e61d042504
--- /dev/null
+++ b/tools/firmware-utils/src/mkdhpimg.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2016 FUKAUMI Naoki <naobsd@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ */
+
+#include <sys/stat.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "buffalo-lib.h"
+
+#define DHP_HEADER_SIZE	20
+
+static char *progname;
+
+static void
+usage(void)
+{
+
+	fprintf(stderr, "usage: %s <in> <out>\n", progname);
+	exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct stat in_st;
+	size_t size;
+	uint32_t crc;
+	int in, out;
+	uint8_t *buf;
+
+	progname = argv[0];
+
+	if (argc != 3)
+		usage();
+
+	if ((in = open(argv[1], O_RDONLY)) == -1)
+		err(EXIT_FAILURE, "%s", argv[1]);
+
+	if (fstat(in, &in_st) == -1)
+		err(EXIT_FAILURE, "%s", argv[1]);
+
+	size = DHP_HEADER_SIZE + in_st.st_size;
+
+	if ((buf = malloc(size)) == NULL)
+		err(EXIT_FAILURE, "malloc");
+
+	memset(buf, 0, DHP_HEADER_SIZE);
+	buf[0x0] = 0x62;
+	buf[0x1] = 0x67;
+	buf[0x2] = 0x6e;
+	buf[0xb] = 0xb1;
+	buf[0xc] = (size >> 24) & 0xff;
+	buf[0xd] = (size >> 16) & 0xff;
+	buf[0xe] = (size >> 8) & 0xff;
+	buf[0xf] = size & 0xff;
+
+	read(in, &buf[DHP_HEADER_SIZE], in_st.st_size);
+	close(in);
+
+	crc = buffalo_crc(buf, size);
+	buf[0x10] = (crc >> 24) & 0xff;
+	buf[0x11] = (crc >> 16) & 0xff;
+	buf[0x12] = (crc >> 8) & 0xff;
+	buf[0x13] = crc & 0xff;
+
+	if ((out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, 0644)) == -1)
+		err(EXIT_FAILURE, "%s", argv[2]);
+	write(out, buf, size);
+	close(out);
+
+	free(buf);
+
+	return EXIT_SUCCESS;
+}