Copyright (c) 2004 Daniel Hartmeier All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentati...
NAMEcdce - USB Communication Device Class Ethernet driver
SYNOPSISTo compile this driver into the kernel, place the following lines in your kernel configuration file:
device uhci device ohci device usb device miibus device uether device cdce
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:
DESCRIPTIONThe sysctl Cm net.inet.tcp.syncookies driver provides support for USB Host-to-Host (aka USB-to-USB) and USB-to-Ethernet bridges based on the USB Communication Device Class (CDC) and Ethernet subclass.
The USB bridge appears as a regular network interface on both sides, transporting Ethernet frames.
For more information on configuring this device, see ifconfig(8).
USB 1.x bridges support speeds of up to 12Mbps, and USB 2.0 speeds of up to 480Mbps.
Packets are received and transmitted over separate USB bulk transfer endpoints.
The sysctl Cm net.inet.tcp.syncookies driver does not support different media types or options.
HARDWAREThe following devices are supported by the sysctl Cm net.inet.tcp.syncookies driver:
- Prolific PL-2501 Host-to-Host Bridge Controller
- Sharp Zaurus PDA
- Terayon TJ-715 DOCSIS Cable Modem
- "cdce%d: no union descriptor"
- The driver could not fetch an interface descriptor from the USB device. For a manually added USB vendor/product, the CDCE_NO_UNION flag can be tried to work around the missing descriptor.
- "cdce%d: no data interface"
- "cdce%d: could not read endpoint descriptor"
- "cdce%d: unexpected endpoint"
- "cdce%d: could not find data bulk in/out"
- For a manually added USB vendor/product, these errors indicate that the bridge is not compatible with the driver.
- "cdce%d: watchdog timeout"
- A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the transmission before a timeout expired.
- "cdce%d: no memory for rx list -- packet dropped!"
- Memory allocation through MGETHDR or MCLGET failed, the system is running low on mbufs.
- "cdce%d: abort/close rx/tx pipe failed"
- "cdce%d: rx/tx list init failed"
- "cdce%d: open rx/tx pipe failed"
- "cdce%d: usb error on rx/tx"
SEE ALSOarp(4), intro(4), ipheth(4), netintro(4), urndis(4), usb(4), ifconfig(8)
- "Universal Serial Bus Class Definitions for Communication Devices"
- "Data sheet Prolific PL-2501 Host-to-Host Bridge/Network Controller"