Day: March 31, 2021

gvim保存配色字体

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vi /etc/vim/vimrc

加入

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"colorscheme torte
colorscheme koehler
set guifont=Monospace\ 9
set guioptions=aegimLt
set cindent
set number
set hls
let g:SrcExpl_isUpdateTags = 0
if has("autocmd")
  au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif
endif

refer to:
https://blog.csdn.net/wu407797466/article/details/7939148?utm_source=blogxgwz0

vim gdb调试可视化

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先安装gvim

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sudo apt install vim-gtk3

再下载最新clewn

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http://clewn.sourceforge.net

比如clewn-1.15.tar.gz

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apt install libncurses-dev
apt install libreadline-dev
tar xaf clewn-1.15.tar.gz
cd clewn-1.15
./configure
make
make install

获取要调试程序的pid，比如98747

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clewn -ga "-p 98747"

在原命令行中打断点再继续，当被调试程序命中断点后，gvim中会同步源码到断点处。

refer to:
http://clewn.sourceforge.net/doc.html

ubuntu下载当前版本内核源码

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vi /etc/apt/sources.list

uncomment lines beginning with 'deb-src' and save, then

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apt-get update
apt-get source linux-image-unsigned-$(uname -r)

refer to:
https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel
https://stackoverflow.com/questions/45766719/error-during-ubuntu-kernel-source-download

IPSec备忘录

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名词缩写

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psk: pre-shared key
pki: public key infrastructure
pkcs: the public-key cryptography standards
ah: authentication header
esp: encapsulating security payload
esn: extended sequence number, rfc 4304
spi: security parameter index
ike: internet key exchange
isakmp: internet security association and key management protocol
sa: security association
spd: security policy database
sad: sa database
pad: peer authorization database
dh: diffie-hellman, oakley
gre: general routing encapsulation
nas: network access server
pap: password authentication protocol
chap: challenge-handshake authentication protocol
eap: extensible authentication protocol
leap: lightweight eap
peap: protected eap
tls：transport layer security
ssl: secure socket layer
fast: flexible authentication via secure tunneling
pac: protected authentication credential
pptp: point to point tunneling protocol
l2f: layer 2 forwarding
l2tp: layer 2 tunneling protocol
sstp: secure socket tunneling protocol
vrc: vpn remote client
des: data encryption standard
aes: advanced encryption standard
 ecb: electronic codebook book
 cbc: cipher block chaining
 ctr: counter
 cfb: cipher feedback
 ofb: output feedback
hmac: hash-based message authentication code
sha1: secure hash algorithm 1
prf: pseudo-random function
aead: authenticated encryption with associated data
icv: integrity check value
ocsp: online certificate status protocol
dpd: dead peer detection

rfc

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rfc1994: PPP Challenge Handshake Authentication Protocol (CHAP)
rfc2865: Remote Authentication Dial In User Service (RADIUS)
rfc3579: RADIUS Support For Extensible Authentication Protocol (EAP)
rfc3748: Extensible Authentication Protocol (EAP)
rfc4186: EAP Method for GSM Subscriber Identity Modules (EAP-SIM)
rfc4187: EAP Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)
rfc4301: Security Architecture for the Internet Protocol
rfc4306: Internet Key Exchange (IKEv2) Protocol
rfc4307: Cryptographic Algorithms for Use in IKEv2
rfc4478: Repeated Authentication in Internet Key Exchange (IKEv2) Protocol
rfc4543: The Use of Galois Message Authentication Code (GMAC) in IPsec ESP and AH
rfc4555: IKEv2 Mobility and Multihoming Protocol (MOBIKE)
rfc4718: IKEv2 Clarifications and Implementation Guidelines
rfc4739: Multiple Authentication Exchanges in the Internet Key Exchange (IKEv2) Protocol
rfc4806: Online Certificate Status Protocol (OCSP) Extensions to IKEv2
rfc5996: Internet Key Exchange Protocol Version 2 (IKEv2)
rfc5998: An Extension for EAP-Only Authentication in IKEv2
rfc6479: IPsec Anti-Replay Algorithm without Bit Shifting

ipsec-tools

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setkey: sad, spd
racoon: ike sa, ipsec sa

网络分层

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物理层，也叫第一层
链路层，也叫第二层（MAC）
网络层，也叫第三层（IP）
传输层（TCP）
应用层（HTTP）

TCP术语

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tos: type of service
ecn: explicit congestion notification
dscp: differentiated services codepoint
rtt: round-trip time
ttl: time to live
tso: tcp segmentation offloading
ufo: udp fragmentation offloading
qdisc: queueing discipline
poe: power over ethernet
toe: tcp offload engine

IPS

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ids: intrusion detection system
ips: intrusion prevention system

refer to:
https://blog.csdn.net/jiangwlee/article/details/7395903
https://baike.baidu.com/item/PKCS/1042350?fr=aladdin
https://blog.csdn.net/qq_27969037/article/details/95929199
https://wikitech.wikimedia.org/wiki/IPsec
https://datatracker.ietf.org/doc/html/rfc2401
https://wiki.strongswan.org/projects/strongswan/wiki/IpsecConf

UE4 Shader源码编译过程

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在主程序里拼成一个文件WorkerInputOnly.in后启动ShaderCompileWorker.exe进程编译shader源码。以下是调试时记录下来的命令行

D:/ue/Engine/Binaries/Win64/ShaderCompileWorker.exe "C:/Users/euhat/AppData/Local/Temp/UnrealShaderWorkingDir/A1AF8D424B2A34C30CE4378EDE6A0EFB/2/" 14492 2 WorkerInputOnly.in WorkerOutputOnly.out -communicatethroughfile  -TimeToLive=20.000000 -Multiprocess