拿不到ip地址，如何定位？
日志信息如下：
bin #
/bin #
/bin # quectel-CM -s cmnet
[01-01_00:49:06:801] Quectel_Linux_ConnectManager_SR01A01V21
[01-01_00:49:06:801] quectel-CM profile[1] = cmnet///0, pincode = (null)
[01-01_00:49:06:801] Find qmichannel = /dev/cdc-wdm0
[01-01_00:49:06:801] Find usbnet_adapter = wwan0
[01-01_00:49:06:901] cdc_wdm_fd = 7
[01-01_00:49:06:970] Get clientWDS = 20
[01-01_00:49:07:002] Get clientDMS = 1
[01-01_00:49:07:034] Get clientNAS = 4
[01-01_00:49:07:066] Get clientUIM = 1
[01-01_00:49:07:098] Get clientWDA = 1
[01-01_00:49:07:130] requestBaseBandVersion EC20CEFAGR06A15M4G
[01-01_00:49:07:194] requestGetSIMStatus SIMStatus: SIM_READY
[01-01_00:49:07:194] requestSetProfile[1] cmnet///0
[01-01_00:49:07:258] requestGetProfile[1] cmnet///0
[01-01_00:49:07:290] requestRegistrationState2 MCC: 460, MNC: 0, PS: Attached, DataCap: LTE
[01-01_00:49:07:322] requestQueryDataCall ConnectionStatus: DISCONNECTED
[01-01_00:49:07:386] requestRegistrationState2 MCC: 460, MNC: 0, PS: Attached, DataCap: LTE
[01-01_00:49:07:738] requestSetupDataCall WdsConnectionIPv4Handle: 0x8730dff0
[01-01_00:49:07:802] requestQueryDataCall ConnectionStatus: CONNECTED
[01-01_00:49:07:834] Fail to access /usr/share/udhcpc/default.script, errno: 13 (Permission denied)
udhcpc: started, v1.26.2
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
使用ifconfig查看：
~ # ifconfig wwan0
wwan0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet6 addr: fe80::b28a:9464:7c0a:5242/64 Scope:Link
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:40 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
~ #
