On Wed, Nov 12, 2014 at 2:21 PM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > On Tue, Nov 4, 2014 at 5:55 PM, Dan Williams <dcbw@xxxxxxxxxx> wrote: >> On Tue, 2014-11-04 at 16:11 +0100, Sedat Dilek wrote: >>> Hi, >>> >>> I wanted to understand what is going on the kernel-side when >>> connecting to the Internet via a Huawei E173 USB web-stick (3rd >>> Generation: UMTS / HSPA). >>> >>> Especially the correlation between the diverse USB/NET kernel-drivers >>> and how the networking is setup. >> > > [ Sitting in front of a foreign Windows machine ] > > [ CC Aleksander ] > > Hi Dan, > > sorry for the late (and short) response. > > AFAICS you have given a "skeleton" for a "usb-wwan-networking" > documentation :-). > > Personally, I would like to take into account some kernel-config > options and some more things. > I started with documenting... I have still some difficulties in understanding USB WWAN Networking. So, this is what I revealed... ##### USB: HUAWEI E173 3G/UMTS/HSPA INTERNET STICK ### USB-NETWORKING AND WWAN SETUP CONFIG_USB_USBNET=m <--- usb networking CONFIG_USB_NET_CDCETHER=m <--- usb-wwan (net) configuration CONFIG_USB_SERIAL_WWAN=m <--- usb-wwan (serial) configuration CONFIG_USB_SERIAL_OPTION=m <--- usb-serial driver called "option" ### PPP OPTIONS CONFIG_PPP=y CONFIG_PPP_BSDCOMP=m CONFIG_PPP_DEFLATE=m CONFIG_PPP_FILTER=y CONFIG_PPP_MULTILINK=y CONFIG_PPP_ASYNC=m Beyond the PPP options, I wanted to understand what CONFIG_USB_NET_CDCETHER does and why I need it. Can someone help? Thanks. - Sedat - [1] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/net/usb/Kconfig#n189 P.S.: cdc_ether Kconfig option and checking my logs >From [1]... ... config USB_NET_CDCETHER tristate "CDC Ethernet support (smart devices such as cable modems)" depends on USB_USBNET default y help This option supports devices conforming to the Communication Device Class (CDC) Ethernet Control Model, a specification that's easy to implement in device firmware. The CDC specifications are available from <http://www.usb.org/>. CDC Ethernet is an implementation option for DOCSIS cable modems that support USB connectivity, used for non-Microsoft USB hosts. The Linux-USB CDC Ethernet Gadget driver is an open implementation. This driver should work with at least the following devices: * Dell Wireless 5530 HSPA * Ericsson PipeRider (all variants) * Ericsson Mobile Broadband Module (all variants) * Motorola (DM100 and SB4100) * Broadcom Cable Modem (reference design) * Toshiba (PCX1100U and F3507g/F3607gw) * ... This driver creates an interface named "ethX", where X depends on what other networking devices you have in use. However, if the IEEE 802 "local assignment" bit is set in the address, a "usbX" name is used instead. ... >From my logs... $ dmesg | egrep -i 'option|wwan|ppp|3-1.2|huawei|gsm|modem' [ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups [ 0.549498] PPP generic driver version 2.4.2 [ 1.299059] usb 3-1.2: new high-speed USB device number 3 using ehci-pci [ 1.394084] usb 3-1.2: New USB device found, idVendor=12d1, idProduct=1436 [ 1.394095] usb 3-1.2: New USB device strings: Mfr=4, Product=3, SerialNumber=0 [ 1.394100] usb 3-1.2: Product: HUAWEI Mobile [ 1.394103] usb 3-1.2: Manufacturer: HUAWEI Technology [ 2.115424] usb-storage 3-1.2:1.0: USB Mass Storage device detected [ 2.125026] usb-storage 3-1.2:1.1: USB Mass Storage device detected [ 2.125607] usb-storage 3-1.2:1.2: USB Mass Storage device detected [ 2.125888] usb-storage 3-1.2:1.3: USB Mass Storage device detected [ 2.126187] usb-storage 3-1.2:1.4: USB Mass Storage device detected [ 2.126461] usb-storage 3-1.2:1.5: USB Mass Storage device detected [ 2.127098] scsi host11: usb-storage 3-1.2:1.5 [ 2.129370] usb-storage 3-1.2:1.6: USB Mass Storage device detected [ 2.131685] scsi host12: usb-storage 3-1.2:1.6 [ 3.127317] scsi 11:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [ 3.137589] scsi 12:0:0:0: Direct-Access HUAWEI SD Storage 2.31 PQ: 0 ANSI: 2 [ 13.500302] cdc_ether 3-1.2:1.1 wwan0: register 'cdc_ether' at usb-0000:00:1a.0-1.2, Mobile Broadband Network Device, 02:50:f3:00:00:00 [ 14.160221] usbcore: registered new interface driver option [ 14.160820] usbserial: USB Serial support registered for GSM modem (1-port) [ 14.160940] option 3-1.2:1.0: GSM modem (1-port) converter detected [ 14.163032] usb 3-1.2: GSM modem (1-port) converter now attached to ttyUSB0 [ 14.163305] option 3-1.2:1.3: GSM modem (1-port) converter detected [ 14.163676] usb 3-1.2: GSM modem (1-port) converter now attached to ttyUSB1 [ 14.163742] option 3-1.2:1.4: GSM modem (1-port) converter detected [ 14.165227] usb 3-1.2: GSM modem (1-port) converter now attached to ttyUSB2 [ 72.877065] PPP BSD Compression module registered [ 72.881701] PPP Deflate Compression module registered - EOT - -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
