2015.10.05 Updated > Network Device Development - Part 1: Switch
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Network Device Development Part 1: Switch How to develop a network device like switch
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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
- 5. Simple, Support, Easy, … X86 Board
- 6. X86 Board with 6 Ethernet
- 10. Choose your Operating System
- 11. Simple, Clean, Easy, … Debian
- 13. Choose your Virtual Machine
- 14. Simple, Stable, Fast, … VMware Workstation
- 15. Setup your Board
- 16. X86 Board with 6 Ethernet eth5 eth4 eth3 eth2 eth1 eth0
- 17. X86 Board with 6 Ethernet Internet mSATA mSATA RAM USB DVD-ROM
- 18. Setup your Virtual Machine
- 19. Simple, Stable, Fast, … VMware Workstation
- 20. Virtual Network Editor Add Network: VMnet2, VMnet3, …, VMnet8
- 21. Virtual Network Editor Modify IP 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
- 24. Install Operating System Later
- 25. Choose Guest Operating System Linux + Debian 6 Linux + Debian 7
- 29. Add 6 Virtual Network Adapter
- 30. Done
- 31. Install your Operating System
- 62. Uncheck them to keep smallest installation
- 69. Setup your Operating System
- 70. Reboot
- 71. Login by root
- 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-get install –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
- 76. Search Kernel DevelopmentPackages Debian 6.0.10 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 Debian 6.0.10 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 Debian 6.0.10 $ 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
- 81. Development More Easily Use SSH Client, SFTP Client, and Smart Text Editor
- 84. Always
- 85. Hello World
- 86. Create Makefile Return kernel version
- 87. Create main.c Include Header File Init $ insmod *.ko Exit $ rmmod *.ko Register Module
- 88. Clear Kernel Message Buffer $ dmesg -c
- 89. Build $ make
- 90. Install $ make install $ dmesg
- 91. Remove $ make remove $ dmesg
- 92. About Netfilter
- 97. Set Promisc Mode $ ifconfig eth1 0.0.0.0 promisc up $ ifconfig eth2 0.0.0.0 promisc up
- 98. Create Bridge $ brctl addbr 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 Kernel Module
- 101. Modify main.c Include Header Files Forward Hook Hook Declaration
- 102. Modify main.c Include Header Files Forward Hook Hook Declaration If one header miss, compilation still success. But, operating system will crash when module inserting.
- 103. Modify main.c Register Hook Unregister Hook
- 104. Install $ make $ make install $ dmesg
- 105. Test your Netfilter Kernel 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 CLIENT of VMnet2 $ ping 192.168.103.128 For all packets, forwarding is accepted.
- 109. Modify main.c Include Header Files Forward Hook Hook Declaration
- 110. Reinstall $ make remove $ make $ make install
- 111. Test on CLIENT of VMnet2 $ ping 192.168.103.128 For all packets, forwarding is rejected.
- 112. Next Part
- 113. Firewall 101