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2015.10.05 Updated > Network Device Development - Part 1: Switch
This document provides instructions for setting up a network development environment using a Debian virtual machine. It includes choosing a board and operating system, installing Debian in a VMware virtual machine, configuring virtual networks, developing and installing simple kernel modules to test network functionality, and modifying kernel modules to implement basic firewall rules.
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2015.10.05 Updated > Network Device Development - Part 1: Switch
- 1. Network Device Development PART 1– Switch SEAN
- 2. Sean • Developer • erinus.startup@gmail.com •https://www.facebook.com/erinus
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- 5. Simple, Support, Easy,… X86 Board
- 6. X86 Board with6 Ethernet
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- 10. Choose your OperatingSystem
- 11. Simple, Clean, Easy,… Debian
- 12.
- 13. Choose your VirtualMachine
- 14. Simple, Stable, Fast,… VMware Workstation
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- 16. X86 Board with6 Ethernet eth5 eth4 eth3 eth2 eth1 eth0
- 17. X86 Board with6 Ethernet Internet mSATA mSATA RAM USB DVD-ROM
- 18. Setup your VirtualMachine
- 19. Simple, Stable, Fast,… VMware Workstation
- 20. Virtual Network Editor AddNetwork: VMnet2, VMnet3, …, VMnet8
- 21. Virtual Network Editor ModifyIP number (192.168.10X.0) to match VMnetX for debugging Modify this
- 22. Virtual Network Editor Uncheck"Connect a host virtual adapter to this network" to make isolated subnet Uncheck this
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- 25. Choose Guest OperatingSystem Linux + Debian 6 Linux + Debian 7
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- 29. Add 6 VirtualNetwork Adapter
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- 31. Install your OperatingSystem
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- 62. Uncheck them tokeep smallest installation
- 69. Setup your OperatingSystem
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- 71.
- 72. Remove account $ deluser--remove-home user
- 73. Update and Upgrade $apt-get update $ apt-get –y upgrade $ apt-get –y dist-upgrade
- 74. Install Packages $ apt-getinstall –y vim gcc g++ ssh make cmake openssh-server openssh-client binutils build- essential git python python-dev python-pip zip unzip bzip2 bridge-utils
- 75.
- 76. Search Kernel DevelopmentPackages Debian6.0.10 VMware use linux-headers-2.6.32-5-686 Debian 7.8.0 VMware use linux-headers-3.2.0-4-686-pae
- 77. Search Kernel DevelopmentPackages Debian6.0.10 VMware use linux-headers-2.6.32-5-686 Debian 7.9.0 VMware use linux-headers-3.2.0-4-686-pae
- 78. Install Kernel DevelopmentPackages Debian6.0.10 $ apt-get install –y linux-headers-2.6.32-5-common linux-headers-2.6.32-5-686 Debian 7.9.0 $ apt-get install –y linux-headers-3.2.0-4-common linux-headers-3.2.0-4-686-pae
- 79. Final # release 100+MB $ apt-get autoremove $ apt-get autoclean $ rm /var/cache/apt/archives/*.deb
- 80.
- 81. Development More Easily UseSSH Client, SFTP Client, and Smart Text Editor
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- 87. Create main.c Include HeaderFile Init $ insmod *.ko Exit $ rmmod *.ko Register Module
- 88. Clear Kernel MessageBuffer $ dmesg -c
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- 97. Set Promisc Mode $ifconfig eth1 0.0.0.0 promisc up $ ifconfig eth2 0.0.0.0 promisc up
- 98. Create Bridge $ brctladdbr br0 $ brctl setfd br0 0 # Debian 6.0.10 $ brctl sethello br0 0 # Debian 7.9.0 $ brctl sethello br0 1 $ brctl addif br0 eth1 $ brctl addif br0 eth2 $ brctl stp br0 off $ ifconfig br0 up
- 99. Avoid Unknown Problems $echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts $ echo 0 > /proc/sys/net/ipv4/ip_forward $ echo 0 > /proc/sys/net/ipv4/tcp_syncookies
- 100. First Netfilter KernelModule
- 101. Modify main.c Include HeaderFiles Forward Hook Hook Declaration
- 102. Modify main.c Include HeaderFiles Forward Hook Hook Declaration If one header miss, compilation still success. But, operating system will crash when module inserting.
- 103.
- 104. Install $ make $ makeinstall $ dmesg
- 105. Test your NetfilterKernel Module
- 106. CLIENT of VMnet2 $sudo ip route add 192.168.103.0/24 via 192.168.102.128
- 107. CLIENT of VMnet3 $sudo ip route add 192.168.102.0/24 via 192.168.103.128
- 108. Test on CLIENTof VMnet2 $ ping 192.168.103.128 For all packets, forwarding is accepted.
- 109. Modify main.c Include HeaderFiles Forward Hook Hook Declaration
- 110. Reinstall $ make remove $make $ make install
- 111. Test on CLIENTof VMnet2 $ ping 192.168.103.128 For all packets, forwarding is rejected.
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