OpenBSD NC4200: Using Celcom ZTE MF190 USB Modem.

I just registered with Celcom Broadband with no contract. Received a ZTE MF190 USB modem with sim card and working fine in XP. As usual, making it work in OpenBSD is the goal. OpenBSD's umsm listed a few ZTE USB modem as supported USB 3g modem but currently using cu -l cuaU0 will just display "Connected" and hangs there. Tried using cuaU0 to cuaU2 with no avail. I've posted a question in misc@ and a guy have replied and forwarded related emails regarding ZTE USB 3g modem. Thanks for that!. It seems that this type of USB Modem share similar properties as a supported ZTE modem, so no patching is required.


1) Getting info about the USB Modem.
Here's the dmesg after I inserted the usb 3g modem.

umsm0 at uhub0 port 3 configuration 1 interface 0 "ZTE,Incorporated ZTE WCDMA Technologies MSM" rev 2.00/0.00 addr 5
umsm0 detached
umsm0 at uhub0 port 3 configuration 1 interface 0 "ZTE,Incorporated ZTE WCDMA Technologies MSM" rev 2.00/0.00 addr 5
ucom0 at umsm0
umsm1 at uhub0 port 3 configuration 1 interface 1 "ZTE,Incorporated ZTE WCDMA Technologies MSM" rev 2.00/0.00 addr 5
ucom1 at umsm1
umass1 at uhub0 port 3 configuration 1 interface 2 "ZTE,Incorporated ZTE WCDMA Technologies MSM" rev 2.00/0.00 addr 5
umass1: using SCSI over Bulk-Only
scsibus1 at umass1: 2 targets, initiator 0
cd1 at scsibus1 targ 1 lun 0: <ZTE, USB SCSI CD-ROM, 2.31> SCSI2 5/cdrom removable
umsm2 at uhub0 port 3 configuration 1 interface 3 "ZTE,Incorporated ZTE WCDMA Technologies MSM" rev 2.00/0.00 addr 5
ucom2 at umsm2

Here's the usbdevs -v outputs:

Controller /dev/usb0:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), Intel(0x8086), rev 1.00
port 1 powered
port 2 powered
port 3 addr 5: high speed, power 500 mA, config 1, ZTE WCDMA Technologies MSM(0x0031), ZTE,Incorporated(0x19d2), rev 0.00, iSerialNumber P671A1CELD010000
port 4 powered
port 5 addr 2: high speed, self powered, config 1, USB2 Hub(0x6560), Cypress Semiconductor(0x04b4), rev 0.0b
port 1 addr 3: high speed, self powered, config 1, USB Multibay IDE 2.466(0x031d), Hewlett Packard(0x03f0), rev 2.46, iSerialNumber HH63MC0BLTC1
port 2 powered
port 3 powered
port 4 addr 4: low speed, power 98 mA, config 1, USB-PS/2 Optical Mouse(0xc03d), Logitech(0x046d), rev 20.00
port 6 powered
port 7 powered
port 8 powered
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), Intel(0x8086), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb2:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), Intel(0x8086), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb3:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), Intel(0x8086), rev 1.00
port 1 powered
port 2 powered


2) Set up the logging environment.
I create /var/log/ppp.log file. Then I vim /etc/syslog.conf and add:

!ppp
*.*         /var/log/ppp.log


3) Testing using userland ppp.
So the logging part is done. Now to test the ppp environment. I found that /dev/cuaU2 is the working device for this. I tried /dev/cuaU0 but didn't work. /dev/cuaU1 on the other hand don't have Carrier Detect. Here's my ppp testing result. Bolded texts are my input:

# ppp
Working in interactive mode
Using interface: tun0
ppp ON karlaphp> set device /dev/cuaU2
ppp ON karlaphp> set speed 384000
ppp ON karlaphp> show physical
Name: deflink
State: closed
Device: N/A
Link Type: interactive
Connect Count: 0
Queued Packets: 0
Phone Number: N/A

Defaults:
Device List: "/dev/cuaU2"
Characteristics: 384000bps, cs8, no parity, CTS/RTS on
CD check delay: device specific

Connect time: 0:00:00
0 octets in, 0 octets out
0 packets in, 0 packets out
Overall 0 bytes/sec
ppp ON karlaphp> term
deflink: Entering terminal mode on /dev/cuaU2
Type `~?' for help
AT
OK
ATZ
OK
AT+CGDCONT=1,"IP","celcom3g"
OK
ATDT*99#
CONNECT 7200000

So basically interactive ppp is working, but I haven't got the chance to test my /etc/ppp/ppp.conf script thoroughly as I'm currently at work (yeah I do this at work...). But, for the pleasure of the eyes, here's my current /etc/ppp/ppp.conf script:

default:
 set log Phase tun connect
 set device /dev/cuaU2
 set speed 384000
 disable ipv6cp

celcom:
 set dial "ABORT BUSY ABORT NO\sCARRIER TIMEOUT 5 \"\" ATZ OK-ATZ-OK AT+CGDCONT=1,\\\"IP\\\",\\\"celcom3g\\\" OK \\dATDT\\T TIMEOUT 40 CONNECT"
# dial number are *99# or *99***1#
 set phone "*99#"
 set login
 set authname ""
 set authkey ""
 set timeout 0
 set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0
 add default HISADDR
 enable dns

If I dialed to celcom, I'll get this warning:

Warning: 0.0.0.0/0: Change route failed: errno: No such process
Warning: ff01:6::/32: Change route failed: errno: Network is unreachable
Warning: ff02:6::/32: Change route failed: errno: Network is unreachable
Warning: ff02:6::/32: Change route failed: errno: Network is unreachable

But I was told (by googling) that it's just a warning and non-fatal. The 2nd to 4th warning is just mentioning about IPV6 so it's nothing.


4) Set up pppd for Celcom 3G.*hip hip, hurray!. hip hip, hurray!*
This is the final part. Instead of using userland ppp, I'll go for pppd. Do man both for informations. Ok for this, I will create 2 files. Here's the steps:

First I'll create and edit /etc/ppp/peers/celcom3g file. On my system, there's no /etc/ppp/peers folder so I mkdir it first. Here's what my /etc/ppp/peers/celcom file looks like:

/dev/ttyU2
debug
384000
noauth
noipdefault
ipcp-restart 10
ipcp-accept-local
ipcp-accept-remote
0.0.0.0:10.64.64.64
defaultroute
novj
connect "chat -v -f /etc/ppp/peers/celcom3g.chat"

Then I created /etc/ppp/peers/celcom3g.chat file. Here's what mine looks like:

ABORT "BUSY"
ABORT "NO CARRIER"
ABORT "ERROR"
ABORT "VOICE"
ABORT "NO DIALTONE"
SAY "Calling Celcom3G...\n"
"" AT
OK ATV1
OK ATE0
OK AT&F&D2&C1S0=0
OK ATS7=60S30=0
OK ATS0=0
OK AT
OK ATV1
OK ATE0
OK AT&F&D2&C1S0=0
OK ATS7=60S30=0
OK ATDT*99#
TIMEOUT 45
CONNECT \d\c

Where the hell did I get the idea for all the AT commands?. Well, I took a peek at the USB Modem's log in XP. If you google for Celcom 3G ppp script, you'll most probably notice that I don't have the familiar AT+CGDCONT=1,"IP","celcom3g" command. Do I need it? For now, I don't think so, because I'm updating this while I'm on Celcom 3G! Using that chat script. Why don't I need it? I don't know, honestly. But it's working. You'll also notice that ATDT*99# means that I'm dialing *99#, if you want to use *99***1#, just replace that test appropriately. Oh, I almost forgot how to dial using pppd. First, I created ppp0 links:

# sudo ifconfig ppp0 create

Then dial using pppd:

# pppd call celcom3g

If your script is named other than celcom3g, replace the celcom3g to your file name. To check the log, use tail -f /var/log/daemon to see if there's anything weird, or if reading log files is one of your fetish. How to disconnect from the connection? I just use ps aux | grep ppp and then kill pid and finally ifconfig ppp0 destroy. Do search for scripts that simplifies it.

After I disabled my http_proxy, I can browse the net with no issue. So I set my Firefox to Use system proxy settings. Speaking of which, I need to find a way to automate turning on/off http_proxy depending on whether I'm in the office (proxy) or at home (no proxy). That'll be my next project. As usual, any tips is much appreciated. Later and enjoy!

Edit: I've replace /dev/cuaU2 to /dev/ttyU2. man 4 tty for more info.