nbd's makefile/menuconfig rewrite

[openwrt.git] / target / utils / src / motorola-bin.c

diff --git a/target/utils/src/motorola-bin.c b/target/utils/src/motorola-bin.c
new file mode 100644 (file)
index 0000000..476afe3
--- /dev/null
+++ b/target/utils/src/motorola-bin.c
@@ -0,0 +1,109 @@
+/*
+ * motorola-bin.c
+ *
+ * Copyright (C) 2005 Mike Baker 
+ *                    Openwrt.org
+ *
+ * $Id$
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <netinet/in.h>
+
+unsigned long *crc32;
+
+void init_crc32()
+{
+    unsigned long crc;
+    unsigned long poly = ntohl(0x2083b8ed);
+    int n, bit;
+    if ((crc32 = (unsigned long *) malloc(256 * sizeof(unsigned long))) == (void *)-1) {
+       perror("malloc");
+       exit(1);
+    }
+    for (n = 0; n < 256; n++) {
+        crc = (unsigned long) n;
+        for (bit = 0; bit < 8; bit++)
+            crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1);
+        crc32[n] = crc;
+    }
+}
+
+unsigned int crc32buf(char *buf, size_t len)
+{
+    unsigned int crc = 0xFFFFFFFF;
+    for (; len; len--, buf++)
+        crc = crc32[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+    return crc;
+}
+
+struct motorola {
+       unsigned int crc;       // crc32 of the remainder
+       unsigned int flags;     // unknown, 10577050
+       char *trx;              // standard trx
+};
+
+int main(int argc, char **argv)
+{
+       unsigned int len;
+       int fd;
+       void *trx;
+       struct motorola *firmware;
+
+       if (argc<3) {
+               printf("%s <trx> <motorola.bin>\n",argv[0]);
+               exit(0);
+       }
+
+       // mmap trx file
+       if (((fd = open(argv[1], O_RDONLY))  < 0)
+       || ((len = lseek(fd, 0, SEEK_END)) < 0)
+       || ((trx = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0)) == (void *) (-1))
+       || (close(fd) < 0)) {
+               perror("open/malloc");
+               exit(-1);
+       }
+       
+       // create a firmware image in memory
+       // and copy the trx to it
+       firmware = malloc(len+8);
+       memcpy(&firmware->trx,trx,len);
+       munmap(trx,len);
+
+       // setup the motorola headers
+       init_crc32();
+       firmware->flags = ntohl(0x10577050);
+       firmware->crc   = htonl(crc32buf((char *)&firmware->flags,len+4));
+
+       // write the firmware
+       if (((fd = open(argv[2], O_CREAT|O_WRONLY,0644)) < 0)
+       || (write(fd,firmware,len+8) != len+8)
+       || (close(fd) < 0)) {
+               perror("write");
+               exit(-1);
+       }
+
+       free(firmware);
+
+       return 0;
+}