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#!/usr/bin/perl
#
# License: GPLv2
# Copyright 2016 Bjørn Mork <bjorn@mork.no>
use strict;
use warnings;
use Archive::Zip;
use Getopt::Long;
# fixed prod
my $prod = "9X30";
# fixed version string - must this match the running image? YES: experiments says so
my $imgver = "02.08.02.00";
my $ver = "9999999_9904609_SWI${prod}C_${imgver}_00_Bjorn_001.001_000";
## test with a legal value first!
##my $usbcomp = 0x0000050d; # (diag,nmea,modem,rmnet0)
my $usbcomp = 0x0000050f; # (diag,adb,nmea,modem,rmnet0,rmnet1)
# supported values are:
#
# AT!USBCOMP=<Config Index>,<Config Type>,<Interface bitmask>
# <Config Index> - configuration index to which the composition applies, should be 1
#
# <Config Type> - 1:Generic, 2:USBIF-MBIM, 3:RNDIS
# config type 2/3 should only be used for specific Sierra PIDs: 68B1, 9068
# customized VID/PID should use config type 1
#
# <Interface bitmask> - DIAG - 0x00000001,
# NMEA - 0x00000004,
# MODEM - 0x00000008,
# RMNET0 - 0x00000100,
# RMNET1 - 0x00000400,
# MBIM - 0x00001000,
# e.g.
# 10D - diag, nmea, modem, rmnet interfaces enabled
# 1009 - diag, modem, mbim interfaces enabled
#
# The default configuration is:
# at!usbcomp=1,1,10F'
#bjorn@nemi:~/privat/prog/git/wwan/scripts$ ./parsecwe.pl ~/docs/hardware/sierra/em7455/firmware/SWI9X30C_02.08.02.00/OEM/1102662_9905046_EM7455_02.05.07.00_00_Lenovo-Laptop_#001.003_000.nvu
#FLEHDR: FULL: val=1, code=3, hdrsz=400, imgsz=11976
#CWEHDR: SPKG: crc=0x69d98b86, rev=3, val=NOPE, prod=9X30, imgsz=11976, imgcrc=0x3a9b2ec2, date=12/15/15, compat=0x00000000, xxx=0x00000001
# imgcrc OK, version string: '1102662_9905046_EM7455_02.05.07.00_00_Lenovo-Laptop_001.003_000'
# CWEHDR: FILE: crc=0xf2697aa7, rev=3, val=NOPE, prod=9X30, imgsz=11576, imgcrc=0x79e48690, date=12/15/15, compat=0x00000000, xxx=0x00000001
# imgcrc OK, version string: '1102662_9905046_EM7455_02.05.07.00_00_Lenovo-Laptop_001.003_000'
# CWEHDR: FILE: crc=0xf2697aa7, rev=3, val=NOPE, prod=9X30, imgsz=11176, imgcrc=0xe788bc00, date=12/15/15, compat=0x01000000, xxx=0x00000001
# imgcrc OK, version string: '/nvup/NVUP_1102662_EM7455_Lenovo-Laptop.020'
# CWEHDR: NVUP: crc=0xf2697aa7, rev=3, val=GOOD, prod=9x30, imgsz=10776, imgcrc=0x33ff014e, date=12/15/15, compat=0x00000001, xxx=0x50617273
# imgcrc OK, version string: '1102662_9905046_EM7455_02.05.07.00_00_Lenovo-Laptop_001.003_000'
# NVUP: 10776 bytes, ver=1, count=143, foo=00fe, bar=00000001
# #1 16 bytes: b=0080, c=0001, <02> ff =>
#
# #14 37 bytes: b=3401, c=0001, <08> USB_COMP => 01:00:00:00:0d:10:00:00
# goal: try to create a minimum NV diff file, setting USB_COMP to the chosen value
# strategy: start from the inside, and build header data around until finished
sub crc32 {
my $buf = shift;
my $crc = shift || 0xffffffff;
$crc ^= 0xffffffff;
$crc = Archive::Zip::computeCRC32($buf, $crc);
return $crc ^ 0xffffffff;
}
sub mkfilehdr {
my $imgsz = shift;
return pack("CCnNNa[244]",1, 2, 0, 400, $imgsz, "FULL"); # the meaning of 'code' is uncertain. OEM file has 3, others have 2.
}
sub mkcwehdr {
my ($type, $version, $compat, $xxx, $image) = @_;
my ($mday, $mon, $year) = (localtime)[3,4,5];
$year -= 100;
$mon++;
my $date = sprintf "%02d/%02d/%02d", $mon, $mday, $year;
my $imgsz = length($image);
my $reserved = $type eq 'SPKG' ? &mkfilehdr($imgsz) : pack("a[256]", '');
my $val = $type eq 'NVUP' ? 'GOOD' : pack("N", 0xffffffff);
my $imgcrc = &crc32($image);
my $crc = &crc32($reserved);
return $reserved . pack("NNA4A4A4NNa84a8Na16N", $crc, 3, $val, $type, $prod, $imgsz, $imgcrc, $version, $date, $compat, '', $xxx) . $image;
}
# start from the back: value TLV, name TLV, NVUP entry, NVUP header,
sub mknvup {
my $valtlv = pack("vVVV", 2, 8, 1, $usbcomp); # type=2, len=8, data = 0x0000001, $usbcomp
my $name = "USB_COMP";
my $keytlv = pack("vVCa*", 1, length($name) + 1, 8, $name);
my $len = 8 + length($keytlv) + length($valtlv);
my $entry = pack("Vvv", $len, 1, 1); # typical values
# header ($ver, $count, $foo, $bar)
return pack("vvvV", 1, 1, 1, 1). # typical values, except for count which is fixed at 1 here
$entry . $keytlv . $valtlv;
}
my $image = &mknvup();
my $cwe = &mkcwehdr('NVUP', $ver, 0x00000001, 0x50617273, $image);
## funker ikke $cwe = &mkcwehdr('FILE', '/swir/nvdelta/NVUP_bjorn.020', 0x01000000, 0x00000001, $cwe);
$cwe = &mkcwehdr('FILE', '/nvup/NVUP_BJORN.020', 0x01000000, 0x00000001, $cwe);
$cwe = &mkcwehdr('FILE', $ver, 0x00000000, 0x00000001, $cwe);
$cwe = &mkcwehdr('SPKG', $ver, 0x00000000, 0x00000001, $cwe);
print $cwe;
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