------------------------------------------------------------------------------ Linux WAN Router Utilities Package ------------------------------------------------------------------------------ Version beta1-2.3.1 Jan 27 2003 Author: Nenad Corbic Copyright (c) 1995-2003 Sangoma Technologies Inc. ------------------------------------------------------------------------------ INTRODUCTION Wide Area Networks (WANs) are used to interconnect Local Area Networks (LANs) and/or stand-alone hosts over vast distances with data transfer rates significantly higher than those achievable with commonly used dial-up connections. Usually an external device called `WAN router' sitting on your local network or connected to your machine's serial port provides physical connection to WAN. Although router's job may be as simple as taking your local network traffic, converting it to WAN format and piping it through the WAN link, these devices are notoriously expensive, with prices as much as 2 - 5 times higher then the price of a typical PC box. Alternatively, considering robustness and multitasking capabilities of Linux, an internal router can be built (most routers use some sort of stripped down Unix-like operating system anyway). With a number of relatively inexpensive WAN interface cards available on the market, a perfectly usable router can be built for less than half a price of an external router. Yet a Linux box acting as a router can still be used for other purposes, such as fire-walling, running FTP, WWW or DNS server, etc. This kernel module introduces the notion of a WAN Link Driver (WLD) to Linux operating system and provides generic hardware-independent services for such drivers. Why can existing Linux network device interface not be used for this purpose? Well, it can. However, there are a few key differences between a typical network interface (e.g. Ethernet) and a WAN link. Many WAN protocols, such as X.25 and frame relay, allow for multiple logical connections (known as `virtual circuits' in X.25 terminology) over a single physical link. Each such virtual circuit may (and almost always does) lead to a different geographical location and, therefore, different network. As a result, it is the virtual circuit, not the physical link, that represents a route and, therefore, a network interface in Linux terms. To further complicate things, virtual circuits are usually volatile in nature (excluding so called `permanent' virtual circuits or PVCs). With almost no time required to set up and tear down a virtual circuit, it is highly desirable to implement on-demand connections in order to minimize network charges. So unlike a typical network driver, the WAN driver must be able to handle multiple network interfaces and cope as multiple virtual circuits come into existence and go away dynamically. Last, but not least, WAN configuration is much more complex than that of say Ethernet and may well amount to several dozens of parameters. Some of them are "link-wide" while others are virtual circuit-specific. The same holds true for WAN statistics which is by far more extensive and extremely useful when troubleshooting WAN connections. Extending the ifconfig utility to suit these needs may be possible, but does not seem quite reasonable. Therefore, a WAN configuration utility and corresponding application programmer's interface is needed for this purpose. Most of these problems are taken care of by this module. Its goal is to provide a user with more-or-less standard look and feel for all WAN devices and assist a WAN device driver writer by providing common services, such as: o User-level interface via /proc file system o Centralized configuration o Device management (setup, shutdown, etc.) o Network interface management (dynamic creation/destruction) o Protocol encapsulation/decapsulation To ba able to use the Linux WAN Router you will also need a WAN Tools package available from ftp.sangoma.com/pub/linux/current_wanpipe/wanpipe-X.Y.Z.tgz where vX.Y.Z represent the wanpipe version number. For technical questions and/or comments please e-mail to ncorbic@sangoma.com. For general inquiries please contact Sangoma Technologies Inc. by Hotline: 1-800-388-2475 (USA and Canada, toll free) Phone: (905) 474-1990 ext: 106 Fax: (905) 474-9223 E-mail: dm@sangoma.com (David Mandelstam) ncorbic@sangoma.com (Nenad Corbic) WWW: http://www.sangoma.com INSTALLATION Please read the README.install on how to install the WANPIPE tools and drivers properly. After installation read README.config on how to configure and start wanpipe device. For further information refer to the doc/ directory. ftp.sangoma.com/linux/current_wanpipe/doc COPYRIGHT AND LICENSING INFORMATION This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ACKNOWLEDGEMENTS This product is based on the WANPIPE(tm) Multiprotocol WAN Router developed by Sangoma Technologies Inc. for Linux 2.0.x and 2.2.x. Success of the WANPIPE together with the next major release of Linux kernel in summer 1996 commanded adequate changes to the WANPIPE code to take full advantage of new Linux features. Instead of continuing developing proprietary interface tied to Sangoma WAN cards, we decided to separate all hardware-independent code into a separate module and defined two levels of interfaces - one for user-level applications and another for kernel-level WAN drivers. WANPIPE is now implemented as a WAN driver compliant with the WAN Link Driver interface. Also a general purpose WAN configuration utility and a set of shell scripts was developed to support WAN router at the user level. Many useful ideas concerning hardware-independent interface implementation were given by Mike McLagan and his implementation of the Frame Relay router and drivers for Sangoma cards (dlci/sdla). With the new implementation of the APIs being incorporated into the WANPIPE, a special thank goes to Alan Cox in providing insight into BSD sockets. Special thanks to all the WANPIPE users who performed field-testing, reported bugs and made valuable comments and suggestions that help us to improve this product. o From 2.3.1 contains major structural driver changes. The new Hardware Abstraction layer cleanly separates, the physical layer from the driver/protocol layers. Support for 2.6.X kernel. o From 2.3.0 contains major structural driver changes most notably the ADSL OS abstraction layer. ADLS drivers can now be compiled against any custom kernel. o From 2.2.6 release forward the new S514-7 Dual T/E1, S514-8 Single TE1 and S518 ADSL cards are supproted. o From 2.2.4 release forward the new S514-4 T/E1 and S514-5 56K cards are supported. o From 2.2.3 release forward ALL wanpipe modules including API modules, can be recompiled from ./Setup installation script! NO KERNEL RECOMPILATION is necessary. o From 2.2.3 release forward, wanpipe directory architecture has been changed. New home directory for wanpipe is /etc/wanpipe. o All old releases are in ../old_releases/wanpipe directory. o Custom RPMs can be build based on current kernel image by using the ./Setup buildrpm command. Read the README.rpmbuild. NEW IN beta1-2.3.1 RELEASE =========================== Jan 27 2004 o Support for 2.6.X kernels o New Hardware Abstracion Layer Cleanly separates the hardware layer from the data/protocol layers. o New AFT Hardware Support Sangomas new high-speed T1/E1 adapters. o Bitstrm Update New bitstrm SWITCHING on serial cards. 2.3.0-8 Jan 15 2004 o ADSL Update Fixed the lights problem where lights turn off after training timeout. o All Drivers UDP PKT TYPE The check for UPD packets function has been secured by checking for the packet length before proceeding to test for udp packet. o Wanpipe DEBIAN packager The ./Setup installation script can now build DEBIAN packages. ./Setup builddeb o Wanpipe PCAP Tracing wanpipemon trace utility can now trace to a PCAP type file, that can be read by "Etheral" for graphical protocol decoding. wanpipemon -i -pcap -c tr for further info run: wanpipemon -traceinfo 2.3.0-7 Dec 01 2003 o MAJOR BUG FIX: T1/E1 The 2.3.0-6 release had a major T1/E1 bug! NOTE: This bug was only on 2.3.0-6 release. o Bitstrm Update New bitsreaming firmware. o X25 Update Added an algorithm to check for loss of tx clock. In such case the firmware would not be able to transmit. The API would receive an OOB message with packet type 0x0C same as the modem down condition. Update x25 firmware 2.3.0-6 Nov 24 2003 o Bitstrm Update Fixed E1 API. New Bitstrm Firmware that fixes and monitors the channel slip condition. o X25 Update Added front end state. If modem goes down, the link state will follow. Fixed the incoming call user data lenght filed. The user data length on incoming call would always be set, even if there was no user data. Added detailed milisecond timesamps to trace packets. Updated the trace lost counter. o MPAPI Added PVC support to MPAPI X25 stack Added the MOD128 X25 support o ADSL Update the SMP locks Fixed a shared interrupt bug. o HDLC Firmware Update Added FAST_ISR option to the CHDLC firmware, for better performance when all four ports are running at the same time. 2.3.0-5 Oct 7 2003 o WPBWM Utility Added a bandwidth monitor utility to the wanpipe package. Used for real time throughput statistics on all running network interfaces. o ATM Update ATM drivers didn't work over E1 cards. Configuration issue. o ADSL Update ADSL drivers failed to train on lines in South Africa. Update firmware and minor driver bug fixes. o BitStreaming Bug Fix Problem with bitstreaming over S514 (1/2) Serial cards. o X25API Update Added interrupt based tracing this way the trace will not drop any packets, even during high traffic conditions. o Update X25API The MTU of 128 was not supported :( o PPP over Frame Relay Added the PPP protocol support over Frame Relay. o Setup Update Buildrpm option has been fixed for RedHat 9.0 2.3.0-4 Aug 11 2003 o EduKit Driver Update Updated ioctl calls o Added ss7 headers to the release, to resolve the ss7pipemon compilation issue. 2.3.0-3 Aug 5 2003 o Update to X25API driver Fixed the accept() Fixed the reset() Fixed the clear_call() o Wanpipemon New SS7 monitor o Setup Update Fixed the kernel source update. Now the wanpipe drivers can be compiled inside the kernel tree. 2.3.0-2 Jul 21 2003 o Wanpipe Bug Fix The test code used in debugging was left inside the driver, which caused problems when shutting down wanpipe. 2.3.0-1 Jul 18 2003 o New API sockets The MPAPI sockets have replaced the original WANPIPE API sockets. The API interface is 100% backward compatible. 2.3.0-0 Jun 14 2003 o Wanrouter External Scripts Support The /usr/sbin/wanrouter startup script is now able to start external scripts for each action performed on WANPIPE devices. Script Location: Configurable in /etc/wanpipe/wanrouter.rc eg: WAN_SCRITPS_DIR=/etc/wanpipe/scripts/ Interface Start/Stop Scripts: -- eg: wanpipe1-wan0-start wanpipe1-wan0-stop Interfaces scripts will get invoked by the following commands: wanrouter [start|stop|restart] wanrouter [start|stop|restart] wanrouter [start|stop|restart] or Dynamically by wanpipe syncppp driver after successfull IPCP negotiation. This option is extremely useful for PPPoA ADSL or PPP customers, that need to update their routers based on new negotiated IP addresses. Device Start/Stop Scripts: - eg: wanpipe1-start wanpipe1-stop Device scripts will get invoked by the following commands: wanrouter [start|stop|restart] wanrouter [start|stop|restart] Global Start/Stop Scripts: eg: start stop Global Wanpipe scripts will get invoked by the following commands: wanrouter [start|stop|restart] Wancfg Configurator Update The /usr/sbin/wancfg configuration utility has been updated to create/edit all external global,device,interface scripts. Each script is executed as Bash2 shell script. o Wancfg Configurator Update The /usr/sbin/wancfg configuration utility has been updated to create/edit all external global,device,interface scripts. o New API sockets The MPAPI sockets have replaced the original WANPIPE API sockets. The API interface is 100% backward compatible. o Wanrouter External Scripts Support The /usr/sbin/wanrouter startup script is now able to start external scripts for each action performed on WANPIPE devices. Script Location: Configurable in /etc/wanpipe/wanrouter.rc eg: WAN_SCRITPS_DIR=/etc/wanpipe/scripts/ Interface Start/Stop Scripts: -- eg: wanpipe1-wan0-start wanpipe1-wan0-stop Interfaces scripts will get invoked by the following commands: wanrouter [start|stop|restart] wanrouter [start|stop|restart] wanrouter [start|stop|restart] or Dynamically by wanpipe syncppp driver after successfull IPCP negotiation. This option is extremely useful for PPPoA ADSL or PPP customers, that need to update their routers based on new negotiated IP addresses. Device Start/Stop Scripts: - eg: wanpipe1-start wanpipe1-stop Device scripts will get invoked by the following commands: wanrouter [start|stop|restart] wanrouter [start|stop|restart] Global Start/Stop Scripts: eg: start stop Global Wanpipe scripts will get invoked by the following commands: wanrouter [start|stop|restart] Wancfg Configurator Update The /usr/sbin/wancfg configuration utility has been updated to create/edit all external global,device,interface scripts. Each script is executed as Bash2 shell script. o Wancfg Configurator Update The /usr/sbin/wancfg configuration utility has been updated to create/edit all external global,device,interface scripts. beta7-2.3.0 May 22 2003 o ADCCP Lapb API Protocol New ADCCP Lapb API protocol for S514 and S508 cards. Read the REAME.adccp for more info. o ADSL Update Bug fixes and feature upates to the ADSL code. Including, line watchdog and cell delienation fix. Added a line watchdog feature. New config option ADSL_WATCHDOG in wanpipe1.conf. New PPPoA ppp driver. No need to use the pppd daemon any more. The whole PPPoA configuration is now inside /usr/sbin/wancfg. New Interface Config Options: DYN_INTR_CFG: Option enables dynamic ppp ip addressing PAP: Enables pap authentication CHAP: Enables chap authentication USERID: User id PASSWD: User password Refer to README.adsl for further info. o MPAPI X25 Updates and fixes o Updated WANPIPE for RedHat AS 2.1 distribution. beta6-2.3.0 Apr 22 2003 o ATM firmware update Beta5 had the ATM wrong firmware version, which doesn't work with some ATM switches. o Frame Relay bug fix. If running beta4-2.3.0 update to the latest or enable MULTICASTING in network interface protocol setup. o ADSL protocol update ADSL driver was too sensitive to noisy lines which caused it to re-train too often. ADSL PPPoA has been re-designed. The PPPD Daemon is not used any more. The Wanpipe PPP kernel stack has PAP/CHAP support now. Thus whole PPPoA configuration, including PAP/CHAP is now handled by the /usr/sbin/wancfg configurator. o New SNMP MIBS New SNMP MIBS for T1/E1/56 front ends Updated original protocol mibs: FR/PPP/CHDLC/X25 ... beta5-2.3.0 Apr 9 2003 o New ATM driver for S514(T1/E1) cards Flexible PHY-layer, supporting all formats of Idle, Unassigned and Physical Layer cells. DS1 direct ATM cell mapping as per ITU G.804 Section 2.1. Support for AAL Type 5. ATM operations and management (OAM) support. Extensive statistics at both the PHY and ATM levels. Real-time data scope with advanced cell-filtering capabilities. Unlimited number of VPI/VCI combinations. Encapsulation and protocols supported (IP over ATM, PPP over ATM, and Ethernet over ATM) o ADSL driver update Major bug fixes in ADSL driver. Better retraining algorithm, improved debugging. Better performance on noisy lines. o Multi-Protocol Driver Support The Multi Protocol drivers implements HDLC/PPP/CHDLC protocols in kernel that run over sangoma dumb card support (S514/S508). All Multi Protocol drivers can run on each Sangoma S514/S508 Primary and Secondary Ports. o Multi-Protocol API Support The Multi Protocol API support runs on top of the Multi Protocol drivers. The MPAPI supports X25/LAPB and DSP protocols as kernel modules. All Multi Protocol APIs can run on each Sangoma S514/S508 Primary and Secondary Ports. Sample code /etc/wanpipe/api/mpapi/ The MPAPI support is not released with standard wanpipe release. It must be downloaded separately. For further info contact Sangoma Technologies. o Updated Wanpipe Documentation New PDF Files: WanpipeInstallation.pdf WanpipeConfiguration.pdf WanpipeOperation.pdf WanpipeDebugging.pdf x25_programming_manual.pdf New README Files: There is a README file for each new protocol. eg: README.atm, README.adsl... New README.faq All README files are in doc/ directory or once WANPIPE is installed in /usr/share/doc/wanpipe directory. o Updated Wanpipe utilites beta4-2.3.0 Feb 20 2003 o ATM Protocol support for all S514 (T1/E1/V35) cards. ATM Protocol includes a full PHY/SAR ATM layer. As well as the following ATM Encapsulation Protocols: Ethernet (LLC/VC) over ATM Classical IP (LLC/VC) over ATM ATM Protocol is part of Default WANPIPE protocols, thus it will be compiled by default during ./Setup install IMPORTANT: ATM Protocol is still in beta state and there are known bug issues with the ATM firmware that will be resolved in the next release. o POS (Point of Sale) S509/S515 card support The POS adapters support proprietary protocols such as: IBM 4680, NCR 2126, NCR 1255 To enable POS card, on installation run: ./Setup install Enable POS in Custom compile mode or ./Setup install --protocol=POS o ADSL driver update Major bug fix in rx data path. Racing condition between the interrupt and the rx task. o Wanpipe drivers update Wanpipe Event based line debugging For Frame Relay, PPP and CHDLC protocols, extensive debugging is outputted to the logs, in case of a protocol, line or hardware error events. o Setup installation script update When compiling wanpipe drivers two compilation options are offered: Compilaton Options: Default or Custom Default compilation: Compile the standard WANPIPE protocols into the kernel device driver: Frame Relay, PPP, CHDLC Multi-Port Frame Relay, Multi-Port PPP, and X25(API). " Custom compilation: Offer a menu of all available WAN and API protocols. The user will be able to enable protocols individually or all at once, as desired. o Bit Streaming Update Fixed bitstreaming for E1 cards. New bitstreaming api sample codes in /etc/wanpipe/api/bitstrm directory. beta3-2.3.0 Jan 7 2003 o ADSL Update Added ATM OAM protocol support OAM Cell loopback is used to test the functionality of the ATM network before the upper layers are enabled. i.e. ATM Ping Added further buffer locking mechanism that will further protect buffers on SMP systems. o Wanpipemon Update Added ADSL ATM Cell trace option (tl2) to ADSL debugger. eg: wanpipemon -i -c tl2 o Frame Relay memory leak bug fix under BRIDGE MODE. If a non ethernet packet was received from the remote network, it was not properly deallocated. This condition is very rare but it may occur. o Updated ATMARP's for Classical IP over ATM protocol. On startup the Client will send out ATMARPS every 10 seconds. Refer to RFC2225 o Updated Classical IP over ATM protocol. Maximum MTU=9180 bytes. Specified in RFC2225 beta2 2.3.0 o Bug fix in wanrouter.h header The kernel source compilation failed due to a missing header include file in wanrouter.h This has been fixed now. No other changes except in wanrouter.h. o wanpipemon debugger update beta1-2.3.0 o ADSL abstraction layer has been added to the main wanpipe source. Thus, from now on ADSL code can be compiled against any custom kernel. Added new ATM encapsulation modes: Bridged Ethernet LLC over ATM (PPPoE: requires rp-pppoe) Bridged Ethernet VC over ATM Routed IP LLC over ATM (Classical IP) Routed IP VC over ATM PPP LLC over ATM (PPPoA: requires pppd) PPP VC over ATM (PPPoA: requires pppd) o Wanpipemon GUI update Better menu system o Major driver updates due to new common headers between all protocols and other operating systems (FreeBSD, NetBSD). beta4-2.2.6 o Compilation problems on RedHat 8.0 kernel have been fixed beta3-2.2.6 o Turns out that RedHat 8 moved the 2.4.20 feature into its 2.4.18 kernel, thus causing the same problem. Thus I had to re-do the fix. o Fixed the bug that caused the wanpipe comilation errors when drivers were being compiled into the kernel. (i.e. not modules) The current 2.2.6 RPMS are not affected by this bug, since they were compiled for older kernels (not 2.4.20). beta2-2.2.6 o Due to the change in 2.4.20 kernel all wanpipe network interfaces failed on startup. A fix was a one liner, however it had to be applied to all protocols. beta1-2.2.6 o Support for new hardware: S5147 - Dual T1/E1 card S5148 - T1/E1 card S518 - ADSL card o New ADSL drivers Ethernet of ATM (IPoE and PPPoE) Classical IP of ATM o Updated drivers for all protocols o A unified debugging tool 'wanpipemon' that replaces protocol specific debugging tools (fpipemon, cpipemon, xpipemon ...) GUI support for wanpipemon o Update 'wancfg' configuration tool o Updated documentation o Frame Relay Feature Auto DLCI configuration for a single DLCI. The /usr/sbin/wancfg will offer the auto option if FR is configured for CPE and a Single DLCI. o New MultiPort Frame Relay Driver This new Frame Relay driver can operate on both S514/S508 PRIMARY and SECONDARY ports. Thus, on a single S5141 card one can run CHDLC, and FR on each port. On a S5142 card on can run CHDLC, MPPP and MFR protocols on each 4 ports. o SDLC support for Linux API for SDLC protocol o Update to /usr/sbin/wanrouter wanrouter debug Check current wanpipe environment. After a startup error run this command to get a possible solution i.e. wanrouter start; wanrouter debug; wanrouter debug if_name Display common debugging statistics In case of line problems save to file, wait 2-5mi and send to Sangoma Tech Support i.e. wanrouter debug wp1fr16 > debug_file; wanrouter messages Display wanpipe kernel event messages i.e. /var/log/messages wanrouter conflog Display wanpipe configuration parsing messages i.e. /var/log/wanrouter PRODUCT COMPONENTS AND RELATED FILES /etc/wanpipe/: (or user defined) wanpipe1.conf default router configuration file etc/wanpipe/samples: interface sample interface configuration file wanpipe1.cpri CHDLC primary port wanpipe2.csec CHDLC secondary port wanpipe1.fr Frame Relay protocol wanpipe1.ppp PPP protocol ) wanpipe1.asy CHDLC ASYNC protocol wanpipe1.x25 X25 protocol wanpipe1.stty Sync TTY driver (Used by Kernel PPPD daemon) wanpipe1.atty Async TTY driver (Used by Kernel PPPD daemon) wanrouter.rc sample meta-configuration file /etc/wanpipe/firmware: fr514.sfm Frame relay firmware for Sangoma S508/S514 card cdual514.sfm Dual Port Cisco HDLC firmware for Sangoma S508/S514 card ppp514.sfm PPP Firmware for Sangoma S508 and S514 cards x25_508.sfm X25 Firmware for Sangoma S508 card. bscmp514.sfm Multi point bisync edu_kit.sfm Education driver bitstrm.sfm Bit streaming firmware bscstrm514.sfm Bisync streaming firware /lib/modules/X.Y.Z/misc: wanrouter.o router kernel loadable module af_wanpipe.o wanpipe api socket module /lib/modules/X.Y.Z/net: sdladrv.o Sangoma SDLA support module wanpipe.o Sangoma WANPIPE(tm) driver module syncppp.o Kernel Sync PPP module /proc/net/wanrouter Config reads current router configuration Status reads current router status {name} reads WAN driver statistics /usr/sbin: wanrouter wanrouter start-up script wanconfig wanrouter configuration utility sdladump WANPIPE adapter memory dump utility wanpipemon Debugging Monitor for all WANPIPE protocols wpkbdmon WANPIPE keyboard led monitor/debugger wancfg WANPIPE GUI configuration program. Creates wanpipe#.conf files. cfgft1 GUI CSU/DSU configuration program. wanpipe/ (temporary untar directory): README this file COPYING GNU General Public License Setup installation script Filelist distribution definition file wanrouter.rc meta-configuration file (used by the Setup and wanrouter script) /usr/share/doc/wanpipe: WanpipeInstallation.pdf WAN Router User's Manual WanpipeInstallation.txt WanpipeConfiguration.pdf WanpipeConfiguration.txt WanpipeOperation.pdf WanpipeOperation.txt wanpipe/patches: wanrouter-v2213.gz patch for Linux kernels 2.2.11 up to 2.2.13. wanrouter-v2214.gz patch for Linux kernel 2.2.14. wanrouter-v2215.gz patch for Linux kernels 2.2.15 to 2.2.17. wanrouter-v2218.gz patch for Linux kernels 2.2.18 and up. wanrouter-v240.gz patch for Linux kernel 2.4.0. wanrouter-v242.gz patch for Linux kernel 2.4.2. wanrouter-v243.gz patch for Linux kernel 2.4.3 wanrouter-v244.gz patch for Linux kernel 2.4.4 wanrouter-v245.gz patch for Linux kernel 2.4.5 wanrouter-v246.gz patch for Linux kernel 2.4.6 and up wanrouter-v249.gz patch for Linux kernel 2.4.9 and up wanrouter-v2416.gz patch for Linux kenrel 2.4.16 and up wanrouter-v2034.gz patch for Linux kernel 2.0.34 wanrouter-v2036.gz patch for Linux kernel 2.0.36 and up. wanpipe/patches/kdrivers: Sources of the latest WANPIPE device drivers. These are used to UPGRADE the linux kernel to the newest version if the kernel source has already been pathced with WANPIPE drivers. /etc/wanpipe/api/x25: * x25 api sample programs. /etc/wanpipe/api/chdlc: * chdlc api sample programs. /etc/wanpipe/api/fr: * fr api sample programs. /usr/src/linux/include/linux: wanrouter.h router API definitions wanpipe.h WANPIPE API definitions sdladrv.h SDLA support module API definitions sdlasfm.h SDLA firmware module definitions if_wanpipe.h WANPIPE Socket definitions if_wanpipe_common.h WANPIPE Socket/Driver common definitions. sdlapci.h WANPIPE PCI definitions /usr/src/linux/net/wanrouter: * wanrouter source code /usr/src/linux/drivers/net/wan: sdla* and wanpipe* wanpipe source code /var/log: wanrouter wanrouter start-up log (created by the Setup script) /var/lock: (or /var/lock/subsys for RedHat) wanrouter wanrouter lock file (created by the Setup script)