Hacking USB device drivers->part 1

This is the first article from “Hacking USB device drivers” series. In this part very simple hack: adding missed vendor and product IDs for USB drivers.

• Adding vendor and product IDs for USB drivers
  • Introduction
  • Changing USB IDs database
  • Result
• Adding support for new devices to USB drivers (read)

Updating IOS

I update IOS on WS-C3560G-48TS to latest advanced version: 12.2(25)SEE2. Here is version string from show version command output:

Cisco IOS Software, C3560 Software (C3560-ADVIPSERVICESK9-M), Version 12.2(25)SEE2, RELEASE SOFTWARE (fc1)

And here is hardware string:

cisco WS-C3560G-48TS (PowerPC405) processor (revision C0) with 118784K/12280K bytes of memory.
Processor board ID FOC1028Z5W9
Last reset from power-on
1 Virtual Ethernet interface
52 Gigabit Ethernet interfaces

WS-C3560G-48TS

I got new toy. This is Cisco Catalyst 3560G with 48 Ethernet 10/100/1000 ports. I create new category “cisco” in this blog, where all related to cisco devices posts will be posted.

Porting libpci

Last night i’m start porting pci library from NetBSD to OpenBSD. Not so many work was needed and initial revision of this port was done less than one hour. I make some tests and.. looks like “just work”.

While i porting this library i found function, which present in NetBSD and not present in OpenBSD. It is pci_findproduct(). I make my own implementation of this function based on pci_findvendor() code (see /usr/src/sys/dev/pci/pci_subr.c file ). Here is code:

const char *
pci_findproduct(pcireg_t id_reg)
{
#ifdef PCIVERBOSE
        pci_product_id_t product = PCI_PRODUCT(id_reg);
        const struct pci_known_product *kp;        kp = pci_known_products;

        while (kp->productname != NULL) {       /* all have product name */
                if (kp->product == product)
                        break;
                kp++;
        }
        return (kp->productname);
#else
        return (NULL);
#endif
}

Here is very simple example of program using libpci:

#include <stdio.h>
#include <pci.h>int
main(int argc, char** argv)
{
        printf("%x is %sn", 0x1186, pci_findvendor((pcireg_t) 0x1186));
        printf("%x is %sn", 0x168c, pci_findvendor((pcireg_t) 0x168c));

return 0;
}

Compile and run this sample:

saturn% gcc -Wall -o pcilib pcilib.c -lpci
saturn% ./pcilib
1186 is D-Link Systems
168c is Atheros

I think this library may be useful for people, who don’t want teach pci(4) and use ioctl(2) for managing PCI devices.

TODO: Man page need to be rewritten and library code cleanup to style(9) also needed.

ath(4) testing

I have AR2413 cardbus device (D-Link DWL-G630):

ath0 at cardbus0 dev 0 function 0 “Atheros Communications, Inc., AR5001-0000-0000, Wireless LAN Reference Card”: irq 10
ath0: AR2413 7.8 phy 4.5 rf 5.6, FCC2A*, address 00:13:46:6e:a4:ef

The ath interface:

# ifconfig ath0 up
# ifconfig ath0
ath0: flags=8863 mtu 1500
        lladdr 00:13:46:6e:a4:ef
        media: IEEE802.11 autoselect (DS1 mode 11b)
        status: no network
        ieee80211: nwid default chan 4 bssid 00:13:46:7c:56:b5 23%
        inet6 fe80::213:46ff:fe6e:a4ef%ath0 prefixlen 64 scopeid 0x6

I can see 802.11b frames, and the cat get replies to probe requests, but association doesn’t work:

15:57:59.073693 0:13:46:6e:a4:ef > ff:ff:ff:ff:ff:ff, bssid ff:ff:ff:ff:ff:ff: 802.11: probe request, <radiotap v0, SHORTPRE, chan 4, 11b, txpower 30dBm>
15:58:02.744340 0:13:46:7c:56:b5 > 0:c:f1:62:2:a8, bssid 0:13:46:7c:56:b5: 802.11: probe response, ssid (default), rates, ds, country 71 66 32 1 13 14, erp, <radiotap v0, chan 4, 11b, rssi 18/64>
15:58:02.753001 0:13:46:7c:56:b5 > ff:ff:ff:ff:ff:ff, bssid 0:13:46:7c:56:b5: 802.11: beacon, ssid (default), rates, ds, tim, country 71 66 32 1 13 14, erp, xrates, <radiotap v0, chan 4, 11b, rssi 17/64>

AR2413 and AR5413 patch commited to -current

Patch for supporting AR2413 and AR5413 based devices by ath(4) driver commited to -current.
ath(4) testers needed now.

Screenshot

Screenshot from my laptop.

screen Hosted on Zooomr

zsh and xterm window title

If you want see information from your shell (like current directory, user and hostname) in xterm window title just place the following lines in your ~/.zshrc file:

case $TERM in
    *xterm*)
        precmd () {print -Pn "\e]0;%n@%M: %~\a"}
        ;;
esac

P.S.: I use “*xterm*” in this example, because i have TERM like “color_xterm”, “xterm-sun” and “xterm-hp”, see /etc/termcap file.

New toys

At work I got two new toys.
DKVM-16 and DKVM-IP1. Testing in progress…
P.S.: I’m waiting for Cisco Catalyst 3560.

Many Common Names (CN) in one SSL certificate

Here is tip how to make one ssl certificate for many Common Names (CN).

You need add following strings to your openssl.cfg:

[ req_distinguished_name ]
0.commonName_default            = www.first-domain.com
0.commonName_max                = 64
1.commonName_default            = www.second-domain.com
1.commonName_max                = 64

..and use this config file for making certificate.