Customize Firmware Fiberhome AN5506-04F

Modem Indihome Jadul

Root Access via UART/Serial (First Oprek)

Colokin aja USB TTL di board ada tandanya kok tx,rx,gnd
Pass ada tulisan 'CTR-C', pencet aja. nanti masuk root shell sblm system boot
jalankan: telnetd -l /bin/sh
lalu initialize.sh biar proses boot berlanjut
sekarang bisa konek root via telnet 192.168.1.1 (autologin root tanpa password)

Script Oprek

Sebelum jalanin script oprek, pastikan partisi sudah di remount rw

# remount rw fh_extend
mount -o remount,rw /fh/extend
mount -o remount,rw /

# Change root password, but no effect.
sed -i 's/"root:.\+\?"/"root:B7AIKYar5C1XQ:0:0:root:\/:bin\/sh"/' /fs/extend/mount-fs.sh

# Root Shell on UART
sed -i 's/\/fh\/extend\/load_cli$/#&/' /fh/extend/initialize.sh

# Root Shell via telnetd
echo "telnetd -l /bin/sh" >> /fh/extend/userapp.sh

# Custom init from USB
cat <<EOF > /fh/extend/userapp.sh
#!/bin/sh
telnetd -l /bin/sh
if \$(cat /proc/diskstats | grep sda &>/dev/null); then
    echo "Found USB Storage, mount to /mnt"
    mount /dev/sda1 /mnt
    if [ -x /mnt/initialize.sh ]; then
        exec /mnt/initialize.sh
    else
        echo "Not found initialize.sh in USB Storage!"
        umount /mnt
    fi
else
    echo "initialize.sh=="
    #/fh/extend/initialize.sh
fi
EOF

JIKA BRICKED

Jika mengalami salah edit filesystem sehingga linux/busybox init tidak mau booting, maka masih ada cara mudah untuk menanganinya. yaitu dengan boot menggunakan partisi backup/previous. Caranya:

Colokan USB TTL
Nyalakan Router, pas ada prompt "Press Enter..." tekan enter 1 kali
Anda akan masuk ke U-Boot CVE prompt. ketikan help untuk list command.
ketikan c (Change bootline parameters)
untuk nilai yg tidak diubah, cukup tekan enter
ubah pada bagian Boot image/App basic/App extend tergantung partisi mana yg filenya problem.
ketikan r untuk boot

ftp-sync

Use sublime-text with SFTP Plugin

sed -i 's/^local_root\=.*/local_root=\//' /fhcfg/vsftpd.conf
killall vsftpd
mount -o remount,rw /
sed -i 's/:50:/:0:/' /etc/passwd
mount -o remount,ro /
mount -o remount,rw /fh/extend/
chmod -R g+xw /fh/extend
vsftpd &

PROBLEM DRIVER

Ketika menggunakan driver bawaan tanpa custom dari fiberhome maka ada paket dhcp yg di forward. (kemungkinan) terdapat pada custom driver wl.ko / bcm_enet.ko jadi dhcpserver untuk client yg konek wifi gak akan dapet IP

test net_wlan_dhcp_pkt_filter_func-

TODO

Rebuild bcm_enet.ko and/or wl.ko to make it universal

Mounting JFFS2 Big-Endian

Cek di folder `filesystem/*` sebelum mounting jffs2 di pc anda, mungkin file yg anda cari sudah ada disitu.

Convert JFFS2 big endian to little

jffs2dump -b -c -r -e mtd-little/rootfs mtd-ori/rootfs
jffs2dump -b -c -r -e mtd-little/app_extend mtd-ori/app_extend
jffs2dump -b -c -r -e mtd-little/data mtd-ori/data

Mount it:

sudo ./mount-mtd.sh mtd-little/rootfs
sudo ./mount-mtd.sh mtd-little/app_extend
sudo ./mount-mtd.sh mtd-little/data

Re-Flash MTD / Recovery

Dump Partisi MTD ada di folder mtd-ori. Copikan ke FD, lalu mount. untuk mengembalikannya:

flash_eraseall /dev/mtd0
nandwrite -n -m /dev/mtd0 /mnt/mtd-ori/rootfs
flash_eraseall /dev/mtd1
nandwrite -n -m /dev/mtd1 /mnt/mtd-ori/rootfs_update
flash_eraseall /dev/mtd2
nandwrite -n -m /dev/mtd2 /mnt/mtd-ori/app_basic
flash_eraseall /dev/mtd3
nandwrite -n -m /dev/mtd3 /mnt/mtd-ori/app_basic_update
flash_eraseall /dev/mtd4
nandwrite -n -m /dev/mtd4 /mnt/mtd-ori/app_extend
flash_eraseall /dev/mtd5
nandwrite -n -m /dev/mtd5 /mnt/mtd-ori/app_extend_update

LED

led 0 = off, 1 = on, 2 = blink

echo 1 > /sys/module/reset_led_button_drv/parameters/usb1_led_status

How initialize.sh started?

Still investigating

Customize Boot init

/etc/init.d/bcm-base-drivers.sh contains default SDK Driver load. but this not loaded/linked in /etc/rc3.d/ because the developer use custom /fh/extend/initialize.sh to load the drivers and do OEM thing.

System Information

# cat /proc/cpuinfo 
system type     : AN5506-04FG
processor       : 0
cpu model       : Broadcom BMIPS4350 V8.0
BogoMIPS        : 598.01
wait instruction    : yes
microsecond timers  : yes
tlb_entries     : 32
extra interrupt vector  : no
hardware watchpoint : no
ASEs implemented    :
shadow register sets    : 1
kscratch registers  : 0
core            : 0
VCED exceptions     : not available
VCEI exceptions     : not available

processor       : 1
cpu model       : Broadcom BMIPS4350 V8.0
BogoMIPS        : 606.20
wait instruction    : yes
microsecond timers  : yes
tlb_entries     : 32
extra interrupt vector  : no
hardware watchpoint : no
ASEs implemented    :
shadow register sets    : 1
kscratch registers  : 0
core            : 0
VCED exceptions     : not available
VCEI exceptions     : not available

# cat /proc/mtd 
dev:    size   erasesize  name
mtd0: 01460000 00020000 "rootfs"
mtd1: 01460000 00020000 "rootfs_update"
mtd2: 01460000 00020000 "app_basic"
mtd3: 01460000 00020000 "app_basic_update"
mtd4: 01460000 00020000 "app_extend"
mtd5: 01460000 00020000 "app_extend_update"
mtd6: 004a0000 00020000 "data"
mtd7: 00020000 00020000 "nvram"

# mount
rootfs on / type rootfs (rw)
mtd:rootfs on / type jffs2 (ro,relatime)
proc on /proc type proc (rw,relatime)
tmpfs on /dev type tmpfs (rw,relatime)
tmpfs on /var type tmpfs (rw,relatime,size=420k)
tmpfs on /mnt type tmpfs (rw,relatime,size=16k)
sysfs on /sys type sysfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
mtd:app_basic on /fh/bin type jffs2 (ro,relatime)
mtd:app_extend on /fh/extend type jffs2 (ro,relatime)
mtd:data on /fhcfg type jffs2 (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,mode=620,ptmxmode=000)

MTD INFO

Boot with latest partition

Creating 8 MTD partitions on "brcmnand.0":
0x000000020000-0x000001480000 : "rootfs"
0x000001480000-0x0000028e0000 : "rootfs_update"
0x0000028e0000-0x000003d40000 : "app_basic"
0x000003d40000-0x0000051a0000 : "app_basic_update"
0x0000051a0000-0x000006600000 : "app_extend"
0x000006600000-0x000007a60000 : "app_extend_update"
0x000007a60000-0x000007f00000 : "data"
0x000000000000-0x000000020000 : "nvram"

Boot with backup previous partition

0x000001480000-0x0000028e0000 : "rootfs"
0x000000020000-0x000001480000 : "rootfs_update"
0x000003d40000-0x0000051a0000 : "app_basic"
0x0000028e0000-0x000003d40000 : "app_basic_update"
0x000006600000-0x000007a60000 : "app_extend"
0x0000051a0000-0x000006600000 : "app_extend_update"
0x000007a60000-0x000007f00000 : "data"
0x000000000000-0x000000020000 : "nvram"

Modules

# lsmod
i2cdev 10313 0 - Live 0xc1609000 (O)
reset_led_button_drv 4792 2 - Live 0xc15fc000 (O)
misc_drv 10232 6 - Live 0xc15ef000 (O)
rdpa_cmd 100922 0 - Live 0xc15ca000
endpointdd 3835326 0 - Live 0xc11c1000 (P)
pcmshim 1354 0 - Live 0xc0ead000
wl 2921613 0 - Live 0xc0b9b000 (P)
wlemf 49862 1 wl, Live 0xc0802000 (P)
wfd 19536 1 wl, Live 0xc07e4000
pon_l2_config 4226 0 - Live 0xc07d5000 (PO)
pon_l2_driver 304375 1 pon_l2_config, Live 0xc0779000 (O)
pktrunner 19040 0 - Live 0xc071b000 (P)
bcm_enet 200340 2 wl,pon_l2_driver, Live 0xc06d2000 (O)
iomsg_drv 4146 13 i2cdev,pon_l2_driver,bcm_enet, Live 0xc067f000 (O)
laser_i2c 4777 0 - Live 0xc0676000
gpon_l2_omci_drv 35438 7 wl,pon_l2_driver,bcm_enet, Live 0xc0665000 (O)
gpon_l2_init 22199 3 pon_l2_driver,bcm_enet,gpon_l2_omci_drv, Live 0xc064f000 (O)
rdpa_upper 64544 4 pon_l2_config,pon_l2_driver,gpon_l2_omci_drv,gpon_l2_init, Live 0xc0630000 (PO)
bcmgpon 500253 0 - Live 0xc057b000 (P)
gpon_i2c 11264 0 - Live 0xc04c0000
i2c_bcm6xxx 7214 1 - Live 0xc04b4000
pktflow 111186 1 pktrunner, Live 0xc048d000 (P)
chipinfo 1277 0 - Live 0xc0466000 (P)
bcmbrfp 6814 0 - Live 0xc045f000
rdpa_mw 27896 3 rdpa_cmd,pktrunner,bcmbrfp, Live 0xc044b000
rdpa 1198092 2 pon_l2_driver,gpon_l2_init, Live 0xc02e4000 (P)
rdpa_gpl 15987 12 rdpa_cmd,wfd,pon_l2_driver,pktrunner,bcm_enet,gpon_l2_omci_drv,gpon_l2_init,rdpa_upper,bcmgpon,bcmbrfp,rdpa_mw,rdpa, Live 0xc0135000
bdmf 172809 14 rdpa_cmd,wfd,pon_l2_config,pon_l2_driver,pktrunner,bcm_enet,gpon_l2_omci_drv,gpon_l2_init,rdpa_upper,bcmgpon,bcmbrfp,rdpa_mw,rdpa,rdpa_gpl, Live 0xc00ef000
wlcsm 5156 6 - Live 0xc00a5000 (P)

similar?

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https://wikidevi.wi-cat.ru/SerComm_RV6699_v2

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