7405 平台移植华为EC122上网卡

一、 开发环境

板子：海思3716C 

dongle：华为EC122

虚拟机：ubuntu10.10

在这里参照了一篇博文，由于所移植的上网卡是一个型号，省去了找资料的很多麻烦，苍天啊，大地啊，感动。呵呵

http://blog.csdn.net/liuming_3385/archive/2011/02/24/6206306.aspx

二、以前也移植过一个dongle，那次是稀里糊涂的搞了半个月，最后虽然能够拨号上网了，但是不稳定，在移植中对一些知识的了解也是一知半解。通过这次的移植，了解了3G上网卡的工作流程。需要的工具：ppp-2.3.5.tar.gz  udev-100.tar.bz2

1、libusb-0.1.12.tar.gz   下载地址：http://www.libusb.org/

       libusb 是一个用C语言开发的跨平台的USB设备访问接口库。libusb 设计了一系列的外部API 为应用程序所调用，通过这些API应用程序可以操作硬件，从libusb的源代码可以看出，这些API 调用了内核的底层接口，和kernel driver中所用到的函数所实现的功能差不多，只是libusb更加接近USB 规范。使得libusb的使用也比开发内核驱动相对容易的。需要注意的是libusb有两个版本，0.1 和 1.0版本，usb-modeswitch依赖libusb，但是1.0版本的编译不过。源码里有标准的automake 工具生成的configure文件，直接交叉编译。

2、usb-modeswitch-1.1.7.tar.bz2   下载地址：http://www.draisberghof.de/usb_modeswitch/

主页说明：

    USB_ModeSwitch is (surprise!) a mode switching tool for controlling "flip flop" (multiple device) USB gear.

Several new USB devices (especially high-speed WAN stuff, based on cell phone chipsets containing that feature) have their MS Windows drivers onboard; when plugged in for the first time they act like a flash storage and start installing the driver from there. After installation (and on every consecutive plugging) the driver switches the mode internally, the storage device vanishes (in most cases), and a new device (like an USB modem) shows up. Modem maker "Option" calls that feature "ZeroCD (TM)" since it eliminates the need for shipping a separate driver carrier.

In the beginning, nothing of this was documented in any form and there was hardly any Linux support available.

On the good side, most of the known devices do work in both modes with the available Linux drivers like "usb-storage" or "option" (an optimized serial driver for high-speed modems).That leaves only the problem of the mode switching from storage to modem or whatever the thing is supposed to do.

Fortunately there are things like human reason, USB sniffing programs and "libusb". It is possible to eavesdrop the communication of the MS Windows driver, to isolate the command or action that does the switching and to reproduce the same thing under the rule of Linux or the BSD variants.

USB_ModeSwitch makes this process easy to handle by taking the important parameters from a configuration file and doing all the initialization and communication stuff, with heavy help from "libusb".

It is mainly used automatically - via udev events and rules - to do the switch without any user interaction. But it can also be run as a command line tool, usually when trying to make unknown devices work with it.

USB_ModeSwitch 是控制"flip flop"(多重设备)USB装置的模式转换工具, 现在一些新的USB 设备(特别是一些高速 WAN 设备，如3G数据卡)都有MS Windows的驱动程序，当第一次插入机子的时候，它们处于闪存模式，并从中提取和安装驱动。在驱动安装完毕之后，驱动马上转换模式，储存设备消失(基本上都是这样的)，然后一个新的设备(比如一个USB modem)出现。有些人把这个特性叫做"ZeroCD"。

1．   Usb 闪存模式：提取和安装驱动

2．   转换模式：储存设备模式转换为所需（如3G）设备模式

3．   所需设备模式：使用设备新的功能

 编译修改Makefile ，指定交叉编译工具链和libusb的头文件和库的位置：

root@wang:/work/dongle/usb-modeswitch-1.1.7# cat Makefile  -n

     1 DESTDIR     = /work/dongle/rootfs

     2 PROG        = usb_modeswitch

     3 VERS        = 1.1.7

     4 CC          = mipsel-linux-gcc

     5 STRIP       = mipsel-linux-strip

     6 CFLAGS      += -Wall

     7 LIBS        = -l usb

     8 RM          = /bin/rm -f

     9 OBJS        = usb_modeswitch.c

    10 PREFIX      = $(DESTDIR)/usr

    11 ETCDIR      = $(DESTDIR)/etc

    12 UDEVDIR     = $(DESTDIR)/lib/udev

    13 SBINDIR     = $(PREFIX)/sbin

    14 MANDIR      = $(PREFIX)/share/man/man1

    15 CFLAGS      += -I /work/dongle/rootfs/include

    16 CFLAGS      += -L /work/dongle/rootfs/lib

      修改 usb_modeswitch.conf 文件，加入设备的信息：这一步很关键，资料不好找啊，除非生产厂提供支持。在usb-modeswitch-1.1.7目录下有device_reference.txt文件，在这里可以查到一些设备的信息，但不完整。关于设备的Vendor  Product可以通过另外一种方法，在后边会看到。

root@wang:/work/dongle/usb-modeswitch-1.1.7# cat usb_modeswitch.conf 

# Configuration for the usb_modeswitch package, a mode switching tool for

# USB devices providing multiple states or modes

#

# This file is evaluated by the wrapper script "usb_modeswitch_dispatcher"

# in /usr/sbin

# To enable an option, set it to "1", "yes" or "true" (case doesn't matter)

# Everything else counts as "disable"

# Disable automatic mode switching globally (e.g. to access the original

# install storage)

DisableSwitching=0

# Enable logging (results in a extensive report file in /var/log, named

# "usb_modeswitch_" (and probably others)

EnableLogging=0

# Huawei EC122

#

# #

#

# # Contributor: Anders Blomdell, Ahmed Soliman

#

DefaultVendor= 0x12d1

DefaultProduct= 0x1446

TargetVendor= 0x12d1

TargetProduct= 0x140c

MessageContent="55534243123456780000000000000011060000000000000000000000000000"

3、udev-100.tar.bz2 下载地址：http://www.kernel.org/pub/linux/utils/kernel/hotplug/

使用更高版本的udev没编译过。

udev是一个工作在用户空间的设备管理工具。在USB_ModeSwitch 的介绍中我们已经知道，USB_ModeSwitch 依赖于udev实现热插热拔。

修改Makefile：

    93 prefix ?=$(PWD)/rootfs

    94 etcdir = ${prefix}/etc

    95 sbindir = ${prefix}/sbin

    96 usrbindir = ${prefix}/usr/bin

    97 usrsbindir = ${prefix}/usr/sbin

    98 libudevdir = ${prefix}/lib/udev

    99 mandir = ${prefix}/usr/share/man

   100 configdir = ${etcdir}/udev

   101 udevdir = /dev

   102 DESTDIR =

   103

   104 INSTALL = /usr/bin/install -c

   105 INSTALL_PROGRAM = ${INSTALL}

   106 INSTALL_DATA = ${INSTALL} -m 644

   107 INSTALL_SCRIPT = ${INSTALL_PROGRAM}

   108 PWD = $(shell pwd)

   109

   110 CROSS_COMPILE ?=mipsel-linux-

   111 CC = $(CROSS_COMPILE)gcc

   112 LD = $(CROSS_COMPILE)gcc

   113 AR = $(CROSS_COMPILE)ar

4、完事具备，还欠东风。设备节点准备完以后，还需要拨号工具上网。这就需要PPPD工具上场了。

修改configure文件：

root@wang:/work/dongle/ppp-2.4.5# cat configure -n

     1 #!/bin/sh

     2 # $Id: configure,v 1.38 2008/06/15 07:08:49 paulus Exp $

     3

     4 # Where to install stuff by default

     5 export CC=mipsel-linux-gcc

     6 DESTDIR=$PWD/rootfs/usr/local

     7 SYSCONF=$PWD/rootfs/etc

运行 ./configure 生成Makefile。

修改Makefile 将install 命令中的 -s 选项去掉。

生成的工具和库中我们需要的是pppd chat  rp-pppoe.so

 

5、将生成的可执行文件和库复制到根文件系统。将各种配置文件复制到根文件系统。usb_modeswitch.conf  将安装udev时生成的/etc/udev目录复制到根文件系统的/etc 下；将、ppp-2.4.5/etc.ppp 目录下的内容复制到/etc/ppp目录下。根据上边介绍的攻略生成PPPD 的配置文件并放到根文件系统的相应目录。

6、挂载根文件系统

# 

# mount -t usbfs none  /proc/bus/usb

# mount -t nfs 172.16.7.153:/nfs/7550B/rootfs/dev/ /dev/

# mount -t nfs 172.16.7.153:/nfs/7550B/rootfs/usr/ /usr/

# mount -t nfs 172.16.7.153:/nfs/7550B/rootfs/etc/ /etc/

# 

# 

# 

# 

# 

# cat /proc/bus/usb/devices 

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2

B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0

D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1

P:  Vendor=0000 ProdID=0000 Rev= 2.06

S:  Manufacturer=Linux 2.6.18-7.5 ohci_hcd

S:  Product=BRCM OHCI

S:  SerialNumber=ohci-brcm

C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2

B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0

D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1

P:  Vendor=0000 ProdID=0000 Rev= 2.06

S:  Manufacturer=Linux 2.6.18-7.5 ohci_hcd

S:  Product=BRCM OHCI

S:  SerialNumber=ohci-brcm

C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 2

B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0

D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1

P:  Vendor=0000 ProdID=0000 Rev= 2.06

S:  Manufacturer=Linux 2.6.18-7.5 ehci_hcd

S:  Product=BRCM EHCI

S:  SerialNumber=ehci-brcm

C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=256ms

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 2

B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0

D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1

P:  Vendor=0000 ProdID=0000 Rev= 2.06

S:  Manufacturer=Linux 2.6.18-7.5 ehci_hcd

S:  Product=BRCM EHCI

S:  SerialNumber=ehci-brcm

C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=256ms

7、安装设备驱动。

# lsmod

swsysdrv 2416 0 - Live 0xc0060000

bcmdriver 15904 0 - Live 0xc0064000

yaffs 125840 2 - Live 0xc00bf000

brcmnand 94000 4 - Live 0xc0079000

# cd /usr/local/bin/

# ls

chat                 pppoe-discovery      udevtest

comgt                swapp                udevtrigger

fat32format          swppp-off            unzip

fdisk                udevcontrol          usb_modeswitch

libusb-config        udevd                usb_modeswitch.conf

mke2fs               udevinfo             zip

option.ko            udevmonitor

pppd                 udevsettle

# insmod option.ko 

drivers/usb/serial/usb-serial.c: USB Serial support registered for GSM modem (1-port)

usbcore: registered new driver option

drivers/usb/serial/option.c: USB Driver for GSM modems: v0.7.1

# lsmod

option 7360 0 - Live 0xc005d000

swsysdrv 2416 0 - Live 0xc0060000

bcmdriver 15904 0 - Live 0xc0064000

yaffs 125840 2 - Live 0xc00bf000

brcmnand 94000 4 - Live 0xc0079000

# 

# 

8、运行udevd 工具，以守护进程运行。

# udevd -h

Usage: udevd [--help] [--daemon] [--debug-trace] [--verbose] [--version]

# udevd --daemon

# ps

  PID USER       VSZ STAT COMMAND

    1 root      1200 S    init       

    2 root         0 SW   [migration/0]

    3 root         0 SWN  [ksoftirqd/0]

    4 root         0 SW   [migration/1]

    5 root         0 SWN  [ksoftirqd/1]

    6 root         0 SW<  [events/0]

    7 root         0 SW<  [events/1]

    8 root         0 SW<  [khelper]

    9 root         0 SW<  [kthread]

   10 root         0 SW<  [kblockd/0]

   11 root         0 SW<  [kblockd/1]

   12 root         0 SW<  [khubd]

   13 root         0 SW<  [kseriod]

   14 root         0 SW   [pdflush]

   15 root         0 SW   [pdflush]

   16 root         0 SW<  [kswapd0]

   17 root         0 SW<  [aio/0]

   18 root         0 SW<  [aio/1]

   19 root         0 SW<  [ata/0]

   20 root         0 SW<  [ata/1]

   21 root         0 SW<  [ata_aux]

   22 root         0 SW<  [scsi_eh_0]

   23 root         0 SW<  [scsi_eh_1]

   24 root         0 SW   [mtdblockd]

   25 root         0 SW   [romblockd]

   26 root         0 SW<  [pegasus]

   27 root         0 SW<  [kpsmoused]

   47 bin        824 S    portmap 

   48 root      1188 S    telnetd 

   67 root       956 S    /usr/bin/swsyscmd 

   97 root         0 SW<  [kjournald]

  105 root      1236 S    -/bin/ash 

  108 root         0 SW<  [rpciod/0]

  109 root         0 SW<  [rpciod/1]

  110 root         0 SW   [lockd]

  122 root       900 S <  udevd --daemon 

  123 root      1192 R    ps 

# 

# 

9、在U口插上dongle。

# usb 3-2: new full speed USB device using brcm-ohci-0 and address 2

usb 3-2: configuration #1 chosen from 1 choice

scsi2 : SCSI emulation for USB Mass Storage devices

isa bounce pool size: 16 pages

  Vendor: HUAWEI    Model: Mass Storage      Rev: 2.31

  Type:   CD-ROM                             ANSI SCSI revision: 00

scsi 2:0:0:0: Attached scsi generic sg1 type 5

# cd /usr/local/bin/

# ls

chat                 pppoe-discovery      udevtest

comgt                swapp                udevtrigger

fat32format          swppp-off            unzip

fdisk                udevcontrol          usb_modeswitch

libusb-config        udevd                usb_modeswitch.conf

mke2fs               udevinfo             zip

option.ko            udevmonitor

pppd                 udevsettle

10、转化ROM设备为usb设备。

# usb_modeswitch -c usb_modeswitch.conf 

Looking for target devices ...

 No devices in target mode or class found

Looking for default devices ...

 Found devices in default mode, class or configuration (1)

Accessing device 002 on bus 003 ...

Getting the current device configuration ...

 OK, got current device configuration (1)

Using endpusb 3-2: usbfs: process 138 (usb_modeswitch) did not claim interface 0 before use

oints 0x08 (out) and 0x87 (in)

Using endpoints 0x08 (out) and 0x87 (in)

Inquiring device details; driver will be detached ...

Looking for active driver ...

 OK, driver found ("usb-storage")

 OK, driver "usb-storage" detached

SCSI inquiry data (for identification)

-------------------------

  Vendor String: HUAWEI  

   Model String: Mass Storage    

Revision String: 2.31

-------------------------

USB description data (for identification)

-------------------------

Manufacturer: HUAECHNOLOGIES

     Product: HUAWEI Mobile

  Serial No.: ----------------------

Setting up communication with interface 0 ...

Using endpoint 0x08 for message sending ...

Trying to send message 1 to endpoint 0x08 ...

 OK, message successfully sent

Resetting response endpoint 0x87

 Error resetting endpoint: -145

Resetting message endpoint 0x08

 Error resetting endpoint: -145

usb 3-2: USB disconnect, address 2

 Device is gone, skipping any further commands

-> Run lsusb to note any changes. Bye.

# usb 3-2: new full speed USB device using brcm-ohci-0 and address 3

usb 3-2: configuration #1 chosen from 1 choice

option 3-2:1.0: GSM modem (1-port) converter detected

usb 3-2: GSM modem (1-port) converter now attached to ttyUSB0

option 3-2:1.1: GSM modem (1-port) converter detected

usb 3-2: GSM modem (1-port) converter now attached to ttyUSB1

option 3-2:1.2: GSM modem (1-port) converter detected

usb 3-2: GSM modem (1-port) converter now attached to ttyUSB2

option 3-2:1.3: GSM modem (1-port) converter detected

usb 3-2: GSM modem (1-port) converter now attached to ttyUSB3

scsi3 : SCSI emulation for USB Mass Storage devices

#   Vendor: HUAWEI    Model: Mass Storage      Rev: 2.31

  Type:   CD-ROM                             ANSI SCSI revision: 00

scsi 3:0:0:0: Attached scsi generic sg1 type 5

 ls /dev/

bcmdebug         hdc6             mtdr2            strm9

bcmdma           input            mtdr3            sysdev

bcmgraphics_0    intdev           mtdr4            tty

bcmgraphics_1    kf2x00           mtdr5            tty0

bcmindex_0       kf2x01           mtdr6            tty1

bcmindex_1       kfir0            mtdr7            tty2

bcmindex_2       kmem             mtdr8            tty3

bcmindex_3       loop0            mtdr9            tty4

bcmio            loop1            null             tty5

bcmkeypad        loop10           pod              ttyS0

bcmleds          loop11           ppp              ttyS1

bcmmessage       loop12           ptmx             ttyS2

bcmoutput_0      loop13           pts              ttyS64

bcmoutput_1      loop14           ram0             ttyUSB0

bcmpaxel         loop15           ram1             ttyUSB1

bcmpcm_0         loop2            random           ttyUSB2

bcmpcm_1         loop3            scarda           ttyUSB3

bcmpcmcapture_0  loop4            scardb           urandom

bcmpcmcapture_1  loop5            scd0             usbdev3.2

bcmplay_0        loop6            scd1             usbdev3.2_ep00

bcmplay_1        loop7            sda              usbdev3.2_ep08

bcmplayes_0      loop8            sda1             usbdev3.2_ep87

bcmplayes_1      loop9            sda2             usbdev3.3

bcmplayes_2      Makefile         sda3             usbdev3.3_ep00

bcmplayes_3      mem              sda4             usbdev3.3_ep02

bcmqamoob        mtd0             sda5             usbdev3.3_ep03

bcmrecord_0      mtd1             sda6             usbdev3.3_ep04

bcmrecord_1      mtd10            sdb              usbdev3.3_ep06

bcmrecord_2      mtd11            sdb1             usbdev3.3_ep08

bcmrecord_3      mtd12            sdb2             usbdev3.3_ep81

bcmremote_a      mtd2             sdb3             usbdev3.3_ep82

bcmremote_b      mtd3             sdb4             usbdev3.3_ep83

bcmsejinkbd      mtd4             sdb5             usbdev3.3_ep84

bcmsejinrem      mtd5             sdb6             usbdev3.3_ep85

bcmsettopapi     mtd6             sdc              usbdev3.3_ep86

bcmtransport     mtd7             sdc1             usbdev3.3_ep87

bcmtuner         mtd8             sdc2             usbdev3.5

bcmupggpio       mtd9             sdc3             usbdev3.5_ep00

bcmupgi2c        mtdblock0        sdc4             usbdev3.5_ep08

bcmvbi           mtdblock1        sdc5             usbdev3.5_ep87

brcm0            mtdblock10       sdc6             usbdev3.6

console          mtdblock11       sg1              usbdev3.6_ep00

docsisio         mtdblock12       sr0              usbdev3.6_ep02

hda              mtdblock2        sr1              usbdev3.6_ep03

hda1             mtdblock3        strm0            usbdev3.6_ep04

hda2             mtdblock4        strm1            usbdev3.6_ep06

hda3             mtdblock5        strm10           usbdev3.6_ep08

hda4             mtdblock6        strm11           usbdev3.6_ep81

hda5             mtdblock7        strm12           usbdev3.6_ep82

hda6             mtdblock8        strm2            usbdev3.6_ep83

hdc              mtdblock9        strm3            usbdev3.6_ep84

hdc1             mtdr0            strm4            usbdev3.6_ep85

hdc2             mtdr1            strm5            usbdev3.6_ep86

hdc3             mtdr10           strm6            usbdev3.6_ep87

hdc4             mtdr11           strm7            zero

hdc5             mtdr12           strm8

# 

到此为止生成了设别节点，下面我们拨号：

11、pppd拨号：

# pppd call cdma2000&

# No Rx Descriptor, disabling rx DMA

No Rx Descriptor, disabling rx DMA

Can't create lock file /var/lock/LCK..ttyUSB0: No such file or directory

在/var 目录下生成lock目录。

# pppd call cdma2000&

# Warning: couldn't open ppp database /var/run/pppd2.tdb

Can't create lock file /var/lock/LCK..ttyUSB0: No such file or directory

# mkdir /var/lock/

# pppd call cdma2000&

# Warning: couldn't open ppp database /var/run/pppd2.tdb

Fatal signal 11

Script /usr/local/bin/chat -s -v -f /etc/ppp/cdma2000-connect-chat finished (pid 202), status = 0x7f

Connect script failed

[1] + Done(8)                    pppd call cdma2000

# mkdir /var/run

# pppd call cdma2000&

# lockd: cannot monitor 172.16.7.153

lockd: failed to monitor 172.16.7.153

Warning: couldn't open ppp database /var/run/pppd2.tdb

Fatal signal 11

Script /usr/local/bin/chat -s -v -f /etc/ppp/cdma2000-connect-chat finished (pid 205), status = 0x7f

Connect script failed

# touch /var/run/pppd2.tdb

[1] + Done(8)                    pppd call cdma2000

# pppd call cdma2000&

# timeout set to 5 seconds

abort on (NO CARRIER)

abort on (ERROR)

abort on (NO DIALTONE)

abort on (BUSY)

abort on (NO ANSWER)

send (^MATZ^M)

expect (OK)

ATZ^M^M

OK

 -- got it

send (ATD#777^M)

expect (CONNECT)

^M

ATD#777^M^M

CONNECT

 -- got it

send (\d)

Script /usr/local/bin/chat -s -v -f /etc/ppp/cdma2000-connect-chat finished (pid 218), status = 0x0

Serial connection established.

using channel 1

Using interface ppp0

Connect: ppp0 <--> /dev/ttyUSB0

sent [LCP ConfReq id=0x1 ]

rcvd [LCP ConfAck id=0x1 ]

rcvd [LCP ConfReq id=0x2 ]

sent [LCP ConfAck id=0x2 ]

rcvd [CHAP Challenge id=0x3 <22527ee4763d952b0c8c1faf57230286>, name = "utstar.com"]

sent [CHAP Response id=0x3 <832bf64c4a5451605c7cb078c90a9480>, name = "CARD"]

rcvd [CHAP Success id=0x3 "\000"]

CHAP authentication succeeded: 

CHAP authentication succeeded

sent [IPCP ConfReq id=0x1 ]

rcvd [IPCP ConfReq id=0x4 ]

sent [IPCP ConfRej id=0x4 ]

rcvd [IPCP ConfReq id=0x6 ]

sent [IPCP ConfAck id=0x6 ]

rcvd [IPCP ConfNak id=0x1 ]

sent [IPCP ConfReq id=0x2 ]

rcvd [IPCP ConfAck id=0x2 ]

local  IP address 115.171.106.187

remote IP address 115.168.64.83

primary   DNS address 219.141.140.10

secondary DNS address 219.141.136.10

# ps

  PID USER       VSZ STAT COMMAND

    1 root      1200 S    init       

    2 root         0 SW   [migration/0]

    3 root         0 SWN  [ksoftirqd/0]

    4 root         0 SW   [migration/1]

    5 root         0 SWN  [ksoftirqd/1]

    6 root         0 SW<  [events/0]

    7 root         0 SW<  [events/1]

    8 root         0 SW<  [khelper]

    9 root         0 SW<  [kthread]

   10 root         0 SW<  [kblockd/0]

   11 root         0 SW<  [kblockd/1]

   12 root         0 SW<  [khubd]

   13 root         0 SW<  [kseriod]

   14 root         0 SW   [pdflush]

   15 root         0 SW   [pdflush]

   16 root         0 SW<  [kswapd0]

   17 root         0 SW<  [aio/0]

   18 root         0 SW<  [aio/1]

   19 root         0 SW<  [ata/0]

   20 root         0 SW<  [ata/1]

   21 root         0 SW<  [ata_aux]

   22 root         0 SW<  [scsi_eh_0]

   23 root         0 SW<  [scsi_eh_1]

   24 root         0 SW   [mtdblockd]

   25 root         0 SW   [romblockd]

   26 root         0 SW<  [pegasus]

   27 root         0 SW<  [kpsmoused]

   47 bin        824 S    portmap 

   48 root      1188 S    telnetd 

   67 root       956 S    /usr/bin/swsyscmd 

   97 root         0 SW<  [kjournald]

  105 root      1236 S    -/bin/ash 

  108 root         0 SW<  [rpciod/0]

  109 root         0 SW<  [rpciod/1]

  110 root         0 SW   [lockd]

  122 root       900 S <  udevd --daemon 

  157 root         0 SW<  [scsi_eh_3]

  158 root         0 SW<  [usb-storage]

  217 root      1480 S    pppd call cdma2000 

  221 root      1192 R    ps 

# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:07:63:00:00:0B  

          inet addr:172.16.7.155  Bcast:172.16.7.255  Mask:255.255.255.0

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:7281 errors:2 dropped:2 overruns:0 frame:2

          TX packets:2630 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:1850283 (1.7 MiB)  TX bytes:437288 (427.0 KiB)

          Interrupt:16 

lo        Link encap:Local Loopback  

          inet addr:127.0.0.1  Mask:255.0.0.0

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:16 errors:0 dropped:0 overruns:0 frame:0

          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0 

          RX bytes:1344 (1.3 KiB)  TX bytes:1344 (1.3 KiB)

ppp0      Link encap:Point-to-Point Protocol  

          inet addr:115.171.106.187  P-t-P:115.168.64.83  Mask:255.255.255.255

          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1448  Metric:1

          RX packets:4 errors:0 dropped:0 overruns:0 frame:0

          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:3 

          RX bytes:70 (70.0 B)  TX bytes:64 (64.0 B)

12、拔掉网线测试，主意这里的网线是交换机的广域网口，如果是lan口的话，NFS服务不可用。

# 

# ps

  PID USER       VSZ STAT COMMAND

    1 root      1200 S    init       

    2 root         0 SW   [migration/0]

    3 root         0 SWN  [ksoftirqd/0]

    4 root         0 SW   [migration/1]

    5 root         0 SWN  [ksoftirqd/1]

    6 root         0 SW<  [events/0]

    7 root         0 SW<  [events/1]

    8 root         0 SW<  [khelper]

    9 root         0 SW<  [kthread]

   10 root         0 SW<  [kblockd/0]

   11 root         0 SW<  [kblockd/1]

   12 root         0 SW<  [khubd]

   13 root         0 SW<  [kseriod]

   14 root         0 SW   [pdflush]

   15 root         0 SW   [pdflush]

   16 root         0 SW<  [kswapd0]

   17 root         0 SW<  [aio/0]

   18 root         0 SW<  [aio/1]

   19 root         0 SW<  [ata/0]

   20 root         0 SW<  [ata/1]

   21 root         0 SW<  [ata_aux]

   22 root         0 SW<  [scsi_eh_0]

   23 root         0 SW<  [scsi_eh_1]

   24 root         0 SW   [mtdblockd]

   25 root         0 SW   [romblockd]

   26 root         0 SW<  [pegasus]

   27 root         0 SW<  [kpsmoused]

   47 bin        824 S    portmap 

   48 root      1188 S    telnetd 

   67 root       956 S    /usr/bin/swsyscmd 

   97 root         0 SW<  [kjournald]

  105 root      1236 S    -/bin/ash 

  108 root         0 SW<  [rpciod/0]

  109 root         0 SW<  [rpciod/1]

  110 root         0 SW   [lockd]

  122 root       900 S <  udevd --daemon 

  157 root         0 SW<  [scsi_eh_3]

  158 root         0 SW<  [usb-storage]

  217 root      1480 S    pppd call cdma2000 

  228 root      1192 R    ps 

# route -n

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

115.168.64.83   0.0.0.0         255.255.255.255 UH    0      0        0 ppp0

172.16.7.0      0.0.0.0         255.255.255.0   U     0      0        0 eth0

0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0 ppp0

# ping www.baidu.com

PING www.baidu.com (61.135.169.105): 56 data bytes

64 bytes from 61.135.169.105: seq=0 ttl=54 time=174.563 ms

64 bytes from 61.135.169.105: seq=1 ttl=54 time=176.748 ms

64 bytes from 61.135.169.105: seq=2 ttl=54 time=176.766 ms

64 bytes from 61.135.169.105: seq=3 ttl=54 time=188.764 ms

64 bytes from 61.135.169.105: seq=4 ttl=54 time=174.761 ms

64 bytes from 61.135.169.105: seq=5 ttl=54 time=177.752 ms

64 bytes from 61.135.169.105: seq=6 ttl=54 time=188.751 ms

64 bytes from 61.135.169.105: seq=7 ttl=54 time=193.745 ms

--- www.baidu.com ping statistics ---

8 packets transmitted, 8 packets received, 0% packet loss

round-trip min/avg/max = 174.563/181.481/193.745 ms

总结一下，其实借助udev设备，可以实现dongle的热插热拔，这需要编写udev脚本。以后在学习了。