用oFono来GPRS上网

准备一个3G modem

首先，你需要找一个2G或3G的USB modem。这个在淘宝上花200左右就能买到。我手边用的是Huawei E1750 WCDMA的modem。

一般modem会自带Windows的拨号上网程序，用oFono就可以在Linux下拨号上网了。

GPRS上网

1. 启动ofono

sudo src/ofonod –nd ‘*’

2. 把猫插入USB口，ofono会自动检测到modem

ofonod[2667]: src/modem.c:ofono_modem_create() name: (null), type: huawei
ofonod[2667]: src/modem.c:set_modem_property() modem 0x9f82b40 property Path
ofonod[2667]: src/modem.c:set_modem_property() modem 0x9f82b40 property Registered
ofonod[2667]: plugins/udev.c:add_modem() /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.0/ttyUSB0/tty/ttyUSB0 (huawei)
ofonod[2667]: plugins/udev.c:add_huawei() modem 0x9f82b40
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property ModemRegistered
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property PcuiRegistered
ofonod[2667]: src/modem.c:set_modem_property() modem 0x9f82b40 property Modem
ofonod[2667]: src/modem.c:set_modem_property() modem 0x9f82b40 property ModemRegistered
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property Path
ofonod[2667]: plugins/udev.c:add_modem() /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.1/ttyUSB1/tty/ttyUSB1 (huawei)
ofonod[2667]: plugins/udev.c:add_huawei() modem 0x9f82b40
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property ModemRegistered
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property PcuiRegistered
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property Path
ofonod[2667]: plugins/udev.c:add_modem() /devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2:1.2/ttyUSB2/tty/ttyUSB2 (huawei)
ofonod[2667]: plugins/udev.c:add_huawei() modem 0x9f82b40
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property ModemRegistered
ofonod[2667]: src/modem.c:get_modem_property() modem 0x9f82b40 property PcuiRegistered
ofonod[2667]: src/modem.c:set_modem_property() modem 0x9f82b40 property Pcui
ofonod[2667]: src/modem.c:set_modem_property() modem 0x9f82b40 property PcuiRegistered
ofonod[2667]: plugins/huawei.c:huawei_probe() 0x9f82b40

3. ofono/test/list-modems

xxx@xxx:~/ofono/test$ ./list-modems
[ /huawei0 ]
    Interfaces =
    Powered = 0
    Features =
    Online = 0

4. ./enable-modem /huawei0; ./online-modem /huawei0。从oFono的console你能看到很多log，ofono会初始化modem的各个部分。接下来，让我们看看GPRS部分吧。

5. 你需要先建一个GPRS context, 并设置APN网关。因为我用的是联通的SIM卡，APN是uninet，如果是移动的话，APN用cmnet或者cmwap。

xxx@xxx:~/ofono/test$ ./create-context uninet
Setting APN of /huawei0/context1 to uninet

6. ./list-contexts

xxx@xxx:~/ofono/test$ ./list-contexts
[ /huawei0 ]
    [ /huawei0/context1 ]
        Username =
        Protocol = ip
        Name = Internet
        Settings = { }
        Active = 0
        AccessPointName = uninet
        Password =
        Type = internet

7. ./activate-context. 这是oFono console会有这样的output：

ofonod[2830]: Modem:> AT+CGDCONT=1,"IP","uninet"/r
ofonod[2830]: Modem:< /r/nOK/r/n
ofonod[2830]: Modem:> AT+CGDATA="PPP",1/r
ofonod[2830]: Modem:&lt; /r/nCONNECT/r/n
Entering new phase: 1
Entering new phase: 2
Entering new phase: 3
Received IPCP NAK
Setting suggested dns1
Setting suggested dns2
Setting suggested nbns1
Setting suggested nbns2
Received IPCP NAK
Setting suggested ip addr
Setting suggested dns1
Setting suggested dns2
Entering new phase: 4

8. ./list-contexts会显示已经建立了ppp0 interface。配置好路由后就可以上网了。

xxx@xxx:~/ofono/test$ ./list-contexts
[ /huawei0 ]
    [ /huawei0/context1 ]
        Username =
        Protocol = ip
        Name = Internet
        Settings = { Interface=ppp0 Netmask=255.255.255.255 Method=static DomainNameServers=221.12.1.227,221.12.33.227, Address=172.18.172.196 }
        Active = 1
        AccessPointName = uninet
        Password =
        Type = internet

9. 编辑/etc/resolv.conf, 加入DNS服务器地址

nameserver 221.12.1.227

nameserver 221.12.33.227

10. 配置网络

xxx@xxx:/home/xxx/ofono# sudo ifconfig ppp0 172.18.172.196 netmask 255.255.255.255

xxx@xxx:/home/xxx/ofono# sudo ifconfig ppp0 up

xxx@xxx:/home/xxx/ofono# sudo ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:872 errors:0 dropped:0 overruns:0 frame:0
          TX packets:872 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:59538 (59.5 KB)  TX bytes:59538 (59.5 KB)

ppp0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:172.18.172.196  P-t-P:172.18.172.196  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:36 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:177 (177.0 B)  TX bytes:2380 (2.3 KB)

xxx@xxx:/home/xxx/ofono# ping www.google.com
PING www-g-com-chn.l.google.com (66.249.89.104) 56(84) bytes of data.
64 bytes from nrt04s01-in-f104.1e100.net (66.249.89.104): icmp_seq=1 ttl=51 time=207 ms
64 bytes from nrt04s01-in-f104.1e100.net (66.249.89.104): icmp_seq=2 ttl=51 time=186 ms
^C
--- www-g-com-chn.l.google.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 186.073/196.811/207.549/10.738 ms

恭喜，你可以通过3G卡上网了！;-)