研究手記--我的研究生活

about PCManX compilation

2010-04-19T13:32:00.002+08:00

要裝自編版本的PCManX時，若已裝過其它版本，務必將舊版移除(包括主程式pcmanx-gtk2和函式庫libpcmanx-core0)。
否則雖可編譯成功，在啟動時卻會凍結無法順利執行。

About Brainstorm

2010-02-24T12:51:00.001+08:00

用來解決難題的方法之一。
通常適用於多人。

基本規則(Ground Rules)：

1. Focus on quantity: 點子愈多愈好

2. Withhold criticism: 不對任何點子做批評，承接下點。

3. Welcome unusual ideas: 接受任何異想天開的意見。通常會有意料之外的效益。

4. Combine and improve ideas:整合所有提出來的點子，做出有建設性的結論。

Reference:
Wiki for "Brainstorm":

LUG@NCNU Summer Camp-Introduction to Programming Under UNIX-like OS and GDB(Gnu Debugger)

2009-07-25T13:54:00.003+08:00

講授對象：

大一升大二學生

only programming under Windos with Visual Studio

大二升大三學生

a little experience of working under Linux(CentOS) and FreeBSD, from July 2009

Begin with an example......

由暨大人共同的回憶：資料結構與演算法課的排序講起…

－－
Related Link:
集訓網站

Find a good dictionary for Firefox

2009-03-24T15:50:00.002+08:00

Tried Extension:

Dictionary 2.1.5

還要打字(或用右鍵選擇)、開新分頁，不好用。怎麼會五顆星？
不過查字源、詳細字義還蠻不錯的

FireDictionary
(這預設的dummy dic 是算字數的……)

使用PDIC txt字典(原文譯文 /例文 )

待續…(找不到好用的字典檔…)

paper note

2009-01-14T17:16:00.001+08:00

IPv6 header length 寫錯了!!!! 40 bytes
conclusion要寫多一點。
圖…不夠明確。
實驗數據？

實驗討論很虛。
科科

Computer Network Lab Class Part 2: network benchmark tools

2008-11-25T01:13:00.003+08:00

CN lab2: three network benchmark tools

講授對象：

大四同學
應該都沒用過iperf, ttcp
也不是指令魔人
所以講基本用法時，不要講太快…

Review last week lecture about throughput
(再著重地講一下throughput並非speed...但是自己的觀念「夠」清楚嗎？)

bwping
download source code:
http://tclmon.vsi.ru/files/bwping-latest.tar.gz
(找不到Windows version)
(然後，FreeBSD上得要有root權限才能用…orz...)
利用ICMP測throughput
僅需一端安裝bwping, 只要另一方不會filter ICMP request, 也不會限制ICMP的流量，就可進行測試

ttcp
11/24測試ok!(stu admin還是沒回我信....)
(順便跑一下那篇論文裡的實驗好了…如果時間允許的話)
Windows version download:
http://www.pcausa.com/Utilities/ttcpzip.exe

iperf

Windows version download:
http://www.noc.ucf.edu/Tools/Iperf/iperf.exe

Usage ref: http://www.enterprisenetworkingplanet.com/netos/article.php/3657236
Jperf:
introduction of Jperf
http://openmaniak.com/iperf.php

note:

投影片最好在週二前做好給老爺看過。(那我現在還在混XDD)
要出作業。
全用中文。(還是不要輕易挑戰同學們的易睡度好了XDD)

實驗環境：
client: Windows
server: FreeBSD (stu admin..........可以幫我裝一下嗎？plz....)
+++++++++++++++++++++++
由於課程需要，想在系學會主機上安裝三個網路流量測試軟體，

以供同學們練習用。(三個軟體port都有耶~~果然是源自BSD)
TTCP:
http://www.freebsd.org/cgi/cvsweb.cgi/ports/benchmarks/ttcp/
iperf:
http://www.freebsd.org/cgi/cvsweb.cgi/ports/benchmarks/iperf/
bwping:
http://www.freebsd.org/cgi/cvsweb.cgi/ports/net/bwping/

++++++++++++++++++++++++
(還是跟Alex申請virtual server弄一台FreeBSD好了…)
11/25 virtual server好神奇~(by 土包子)
++++++++++++++++++++++++

作業草案：
•妳(你)是被聘請的網管工程師，老闆是你宿舍的房東。XDD
•第一題：年底了，老闆要求妳交出一份貴宿舍的網路速度報告書，並提出改善方案。 •第二題：跟你同事用IM(instant message)討論一下iperf, ttcp, bwping這三種工具好不好用，然後偷偷把對話記錄寄給我。

(第二題好像有點難寫…)

－－
教學投影片下載 by tintin

TA of Python

2008-11-24T21:23:00.003+08:00

打算下學期去當Python 這門課的助教。

∵缺$$

不過，是週一早上的課 orz

Reference:
Why Python?
moodle 課程資訊

Windows and Apache IPv6 enable

2008-11-24T21:16:00.005+08:00

Windows
under command line: ipv6 install
test: ping ::1
or ping6 ::1 (硬要用version 6的ping...)
(loopback)

Apache
Apache2以降本就支援IPv6, 但Windows version並不能順利跑IPv6, 需下載patch
(還在測試)

OK desu~

測試環境：
Apache 2.2.10
(唐董說不要用Appserv)

client端注意：
請使用ie7 or some kind of ipv6 supporting tool for ie6
請不要在不支援ipv6的nat之後，若此，請安裝自己ISP提供的ipv6 tunnelling solution.

計網作業五：vpn

2008-11-24T00:57:00.003+08:00

vpn: virtual private network

作業還在寫…
我要寫OpenVPN...哈哈哈~

Reference:
wifipedia about vpn

====
(作業…好多~orz)

Q: 若是計網作業是在系學會工作站上CLI 方式寄送，如何證明你之前在時限內就已寄出當次作業？

2008-11-18T14:42:00.002+08:00

Q: 若是計網作業是在系學會工作站上CLI 方式寄送，如何證明你之前在時限內就已寄出當次作業？

supposed: 你是一般使用者。

Ans: I don't know...

====
所以以後還是用webmail介面或是使用mutt之類的MUA(mail user agent)來寄好了…XDD

CG homework

2008-11-18T14:33:00.005+08:00

以下每個年代，請舉出一個代表性的動畫及電玩，並簡要說明之。
80-89

90-99
game:
AOE
(唯一會玩的連線遊戲)
00-05
06
07
08
movie:
功夫熊貓(這應該很難有什麼高超的動畫技巧吧…可是今年我就只看過這部動畫…)

====
我這沒骨氣的人，最後還是去修了電腦圖學。
然後，我這個不玩game也不看動畫的人，跟人家修什麼CG啊啊啊~~這作業該怎麼寫好…

暨大SIP server測試

2008-11-18T13:52:00.005+08:00

撥話規則：
網路電話撥校內分機prefix:1
校內分機撥網路電話prefix:12
負責人：周紹文4021
server:163.22.4.78
account:5001(一開始我就去申請了。我該不會是最早去申請的吧~ XDD)
codec support:G.729,G.723,G.726,G.711(只有G.711...)

(Linphone supports G.729 怎麼設定？jiayu說要改 source code...金麻煩~)

(11/26)SJPhone,Snom softphone待測試

計網作業四怎麼寫？

2008-11-06T23:14:00.004+08:00

Write a computer program that simulates a bridge function. Let two files of data simulate frames transmitted on two LAN segments to which the bridge is connected. To simulate frame transmission, read a fraem from the first file, then a frame from the second file, and so on. For each frame, show whether a bridge will forward a copy of the frame to the other LAN segment.
Each row in the data files will contain 5 characters:
- (U,V): U sends to V
- (Z,-): Z broadcast

兩邊都有一個data file, 每個raw用五個字元代表傳送端和接收端。e.g. (U,V) (Z,-)
每個file要有幾個raws 才夠？(夠的意思是，bridge要學完？)
Ans:幾個都可以，之前是我理解錯誤。

老師說共有A-Z個nodes, 所以一邊會有十三個nodes(不是很確定...)
Ans:兩邊的nodes 是由test data file 決定。

撰寫的語言是否限定為C語言？
Ans:應該是。不然的話，請給助教readme file, 說明如何編譯你的程式。

Note:
交替讀取兩邊的frame data file的用意是，簡化程式流程，不然要真正達到現實生活中的情境，就得參考資料結構中的spanning tree或者在每個frame data raw前加入timestamp欄位。

計網 11/3

2008-11-03T12:45:00.002+08:00

review lecture(hanpo)
Quiz
交換改
new topic(ching-ho)

Quiz
=====
ADSL: 名詞解釋、為什麼是非對稱、最大速率、優點（兩個）

Ｔ１，Ｔ３的速率？

DSU,CSU分別是用來做甚麼用的
HFC
FTTC
PCM

習題12.4

Lazybuntu for KDE

2008-11-03T12:38:00.003+08:00

If it cannot work, please install the package below in advance:
apt-get install python-gtk2 #好像預設有裝…XDD
apt-get install python-vte

NS2 modules (patch)

2008-10-28T08:06:00.009+08:00

patch語法概要：(unified format;using -u option)
--- $新檔名
+++ $舊檔名

被@@包夾代表其修改(增刪)之行號
e.g.
@@ -58,7 +58,7 @@
從第58行刪去7行，再從第58行加入7行
前有+ 表增加之行;
- 表刪去之行;
無+- 表示是參考點，不做修改。
note: 要注意增刪行數不同時…會導致下方相對位置不同。(需在筆記上特別註記)

diff 語法概要：
return value:
兩檔案相同，return 0
不同，return 1, 並列出不同處。

patch usage:patch -p1
patch -p0
-p option我比較喜歡將之解讀成去掉幾個"/" (目錄結構中的/)，不然看man page真的太難懂了。

Reference:
http://hpds.ee.ncku.edu.tw/~smallko/ns2/module.htm
http://www.cpqlinux.com/patch.html

Dia試用

2008-10-23T10:51:00.002+08:00

Dia 超好用的，比Visio好用多了。因為我只需要畫超簡單的圖啊啊啊~
謝謝alextwl.
:)

CVS note

2008-10-21T13:50:00.003+08:00

in ~/.bashrc add:
export CVSROOT=:pserver:username@ms11.voip.edu.tw:/home/cvsroot/

reinstall OS: tintin version

2008-10-21T11:30:00.009+08:00

OS preparation
disk check,
install Linux on /dev/sda2 (Don't ruin Windows OS, although it has a lot of virus XD)
liu input method(gcin)
ns2(specific version:combine ns2-2.31, dccp, voip module.....兩個模組相衝，除非我重寫patch檔...只好只先裝dccp..)
pidgin adjustment
w32codecs|download page

計網作業二

2008-10-17T01:04:00.003+08:00

計網作業二(老爺偷改版)

Use Wireshark to analyze the packets sent from your NIC. Determine the manufacturer according to its OUI.
Save the frames you captures in files. Check the list of all Ethernet frame types in RFC 5342 (BCP 0141). How many different frame types did you observe in your dormitory and NCNU computer classrooms, respectively?

計網作業二(舊版)

Find a list of all Ethernet frame types.
Hint: Read the document RFC 5342 (BCP 0141)

Some Ethertypes Specified by the IETF

    0x0800  Internet Protocol Version 4 (IPv4)
    0x0806  Address Resolution Protocol (ARP)
    0x0808  Frame Relay ARP
    0x880B  Point-to-Point Tunneling Protocol (PPTP)
    0x880C  General Switch Management Protocol (GSMP)
    0x8035  Reverse Address Resolution Protocol (RARP)
    0x86DD  Internet Protocol Version 6 (IPv6)
    0x8847  MPLS
    0x8848  MPLS with upstream-assigned label
    0x8861  Multicast Channel Allocation Protocol (MCAP)
    0x8863  PPP over Ethernet (PPPoE) Discovery Stage
    0x8864  PPP over Ethernet (PPPoE) Session Stage

Some IEEE 802 Ethertypes

    0x8100  IEEE Std 802.1Q  - Customer VLAN Tag Type (C-Tag, formerly
                                called the Q-Tag)
    0x8808  IEEE Std 802.3   - Ethernet Passive Optical Network (EPON)
    0x888E  IEEE Std 802.1X  - Port-based network access control
    0x88A8  IEEE Std 802.1Q  - Service VLAN tag identifier (S-Tag)
    0x88B5  IEEE Std 802     - Local Experimental Ethertype
    0x88B6  IEEE Std 802     - Local Experimental Ethertype
    0x88B7  IEEE Std 802     - OUI Extended Ethertype
    0x88C7  IEEE Std 802.11i - Pre-Authentication
    0x88CC  IEEE Std 802.1AB - Link Layer Discovery Protocol (LLDP)
    0x88E5  IEEE Std 802.1AE - Media Access Control Security
    0x88F5  IEEE Std 802.1ak - Multiple VLAN Registration Protocol
                               (MVRP)
    0x88F6  IEEE Std 802.1Q  - Multiple Multicast Registration
                               Protocol (MMRP)
    0x890D  IEEE 802.11r     - Fast Roaming Remote Request

Use Wireshark to analyze the packets sent from your NIC. Determine the manufacturer according to its OUI.

作業繳交方式：

請在工作站上用mail指令，標題標明"[CN HW2] 94321001"，將 source code寄到"cn-ta@voip.edu.tw" 這個E-mail address.
e.g. mail -s "[CN HW2] 94321001" cn-ta@voip.edu.tw < echoserver.c
註：學號請填自己的，不要寫別人的。

Shell Script note

2008-10-17T00:55:00.003+08:00

Shell script 第一行：#!/
#引入所用直譯器路徑，ex. #!/bin/awk #!/usr/bin/bash #!/bin/sh

shell依照$PATH變數內存的路徑搜尋可執行檔來執行
echo $PATH
/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin
新增個人可執行檔存放目錄，請修改家目錄底下的.profile檔，
export PATH=$PATH:$HOME/bin #$HOEM/bin為新加入的搜尋路徑

單引號 vs. 雙引號

變數(variable)

ns2 note

2008-10-17T00:51:00.002+08:00

Format of trace output .tr file:
action
time
from node
to node
type
packet size
flags
fid
source address
destination address
sequence number
packet id

screen usage note

2008-10-17T00:44:00.007+08:00

Screen 很好用，所以記一下用法。

ctrl +a :所有使用screen大抵都以ctrl+a 來起頭
"ctrl+a" plus "ctrl +d" :detach: 脫離現在session, 但此session仍在運行，之後可以再attach回來，原本運行的程式仍在runtime

screen -ls:列出所有screen session

screen -r : attach 原本被detach的session; 若是有兩個以上為detach狀態之session, 則需加上識別參數…例如process id ~~(我會把常掛irc的那個session process id不小心背下來)~~，可用tab鍵補完。

***活用screen, 生活更easy!!***

-
如何應用:

1. 在兩個以上資料夾之間穿梭或同時需要編輯程式碼及執行程式。
雖然push & pop 也可以來回穿梭在各個資料夾之間，但是總是用不慣…(腦中沒有那樣的圖畫啊啊啊~~阿呆)

2. irrsi常掛irc?(可是我沒有很愛掛XDD)|link1
link2

link3(putty編碼設定)
3. 記錄指令使用歷史(cf.bash_history)
4.寬螢幕者必學。C-a + | 垂直分割視窗。可用來一邊檢視原始碼，一邊debug.
cf: C-a + S 是水平分割。
(愛分幾個就分幾個，只是視窗太小也很難工作便是…)

Demo注意事項

2008-10-15T10:41:00.002+08:00

以後每次 demo 請每位同學準備
- 10 分鐘的簡報: 說明你的系統架構，以及等一下要進行的流程
- 10 分鐘的操作 - 記得口頭說明時要強調，你希望看的人注意到哪些重點
- 10 分鐘的 Q&A 及討論
Demo 後請把我們討論的 TODO list 寫下來寄給我。

Gnuplot note

2008-10-11T11:35:00.003+08:00

(只記好用常用的)

plot "data.txt" with lines

set grid #有格線

set xtics pi/2 #設定x軸點之間隔

set terminal gif #設定輸出格式

set output 'test.gif' #設定輸出檔名

save 'gnuplot.set' #儲存目前的設定和function, 將來可用load 'gunplot.set'取出現在的所有設定

D-ITG note

2008-10-11T00:06:00.000+08:00

號稱可產生多個DCCP流

VoIP Codec notes

2008-10-10T23:51:00.000+08:00

G.711:

最普遍的codec
延襲於circuit switch的世界XD
又稱PCM(Pulse Code Modulation)
one sample 8 bits, and PCM uses 8kHz sampling rate
→8 bits * 8k Hz = 64 k bit per second (64 bps)

GSM
G.729
ADPCM(Adaptive Differential PCM)
DTMF(Dual-Tone Multifrequency) Digits
Nyquist sampling theorem(p86)

計網小考猜題10/10

2008-10-10T21:46:00.008+08:00

Nyquist's theorem
ex.5.4
Use Nyquist's theorem to determine the maximum rate in bits per second at which data can be sent accross a transmission system that has a bandwidth 4000 Hz and uses four values of voltage to encode information.

Shannon theorem

PSM(Phase-Shift Modulation)

in order to encode more bits in one cycle (according to Nyquist theorem)
可encode 3 bits/cycle →2B變6B
0,90,180,270

Error Detection

Parity check

even(湊到偶數個1)
odd(湊到奇數個1)
ascii code: 7 bits + 1 bit parity bit

Checksum

會考！記得4個16位元數字一組，不夠的補零

CRC(Cyclic Redundancy Check Code)(這次先不考，但會出作業)

notation: F: frame(就是data啦~), P:除數, R: 餘數

sender:

F mod P=R, F'=F+R(附加在後),送出F'

receiver:

F' mod P=R'

check:

R=R' (correct) R<>R' (error)

重點在怎麼除：

字串頭為零，直接往左移
字串頭為一，作XOR

如何選擇除數？

待續...

(因為老爺說他花很多時間在這幾個機制上，所以大膽預測會考!!)
Reference:
矛与盾的较量——CRC原理篇：很好懂的介紹

計網作業二

2008-10-09T11:11:00.000+08:00

draft:
計算機網路作業二：暢所欲言的聊天室
作業描述：
請修改chatserver 及chatclient程式，使其可以溝通無礙。
因為範例程式一次只能傳遞一句話，若有一方多說了幾句，就得等待對方也說了話，你說的第二、第三句話才會被顯示在對方的螢幕上。請修改範例程式，讓他們能愛說幾句，就說幾句。(不過buffer是有限度的。XD)

評分標準：
90分--達到暢所欲言的效果。
高於90分--其它特異功能會加分，不過請在註解中以英文說明你加的功能。

繳交期限：
未定，再討論。

計網作業一

2008-10-09T11:09:00.000+08:00

作業一：echoserver進化版
請修改echoserver程式，使其可以在server端同時顯示echoclient傳來的字串。

作業繳交方式：
請在工作站上用mail指令，標題標明"[CN HW1]94321001"，以附加source code檔的方式，寄到"cn-ta@voip.edu.tw" 這個E-mail address.
e.g. mail -s "[CN HW1] 94321001" cn-ta@voip.edu.tw < echoserver.c

評分標準：
70分：echoserver端會顯示接收到的字串，但是會有亂碼。
90分：echoserver端能正確顯示接收到的字串，且echoclient輸入兩次以上之後，不會有亂碼產生。
>90分：加其它功能，則酌量給分。

計網小考猜題

2008-10-08T17:07:00.000+08:00

Ch5,Ch6 Review:

Baseband vs. Broadband
Simple Duplex
Half Duplex
Full Duplex
AM:Amplitude Modulation
FM:Frequency Modulation
TDM, FDM

--

各種連接LAN的裝置

2008-10-08T17:06:00.001+08:00

Repeater:
有Amplifier的作用，但僅做relay的動作(收什麼就送什麼)

Bridge:
不傳noise
Always transmits broadcast and multicast packets→cause packets storm

Hub:
1th layer

Switch:
2nd layer

Router:
3rd layer

Repeater Hub:
Switch Hub:

讀書計劃

2008-08-29T08:04:00.000+08:00

有很多文件要讀，在此一列：(因為不會寫程式，所以要讀很多…驚！)

RFC們:

RFC3448: TFRC, 24 pages
RFC4340: DCCP, 125 pages
RFC4341: CCID2
RFC4342: CCID3, 15 pages
RFC4828:TFRC-SP(實驗), 44 pages
draft of CCID4: 44 pages

SOP of Meeting Presentation PPT File Preparation

2008-08-17T17:00:00.000+08:00

Frontpage:
Speaker:
Advisor:
Date:
Specify the paper original source

---
Content:

Add page number
You should rehearsal three time or above to get familiar with your presentation
Add examples as many as possible

----

You should watch out from head to toe:

TYPO(Always enable the spelling check)
Unify your format
Absolutely avoid "fatal error" in grammar

---
To be continued...

note of installing ns2

2008-08-13T13:29:00.005+08:00

On Debian/Linux:

sudo apt-get install autoconf automake g++ libxmu-dev make
(refer to:http://nsnam.isi.edu/nsnam/index.php/Distribution_Specific_instructions)

cd ns2-allinone-2.31
./install
(會有很多警告，但還是可以過)

modify etc/profile:(重要！)
export NS_HOME=~安裝資料夾/ns-allinone-2.31
(設定NS2的主要目錄，以供以下設定使用)

export PATH=$NS_HOME/tcl8.4.14/unix:$NS_HOME/tk8.4.14/unix:$NS_HOME/bin:$PATH

export LD_LIBRARY_PATH=$NS_HOME/tcl8.4.14/unix:$NS_HOME/tk8.4.14/unix:$NS_HOME/o

export TCL_LIBRARY=$NS_HOME/tcl8.4.14/library

驗證
$NS_HOME/NS2-2.31/validate

------------------------------------------------------
For Cygwin:要安裝(補完其它網頁缺漏的)

diff
gcc
gcc-g++
gnuplot
make
patch
perl
tar
X-startup-scripts
xorg-x11-base
xorg-x11-bin
xorg-x11-devel
xorg-x11-bin-dlls
xorg-x11-bin-lndir
xorg-x11-etc
xorg-x11-fenc
xorg-x11-fnts
xorg-x11-libs-data
xorg-x11-xwin

edit .bashrc(同上)

飯粒檔的位置:
/home/ns-allinone-2.30/ns-2.30/tc

Ref:
http://hpds.ee.ncku.edu.tw/~smallko/ns2/ns2.htm
http://blog.sina.com.cn/s/blog_4a5f138701000bbv.html

about SCTP

2008-08-05T19:12:00.001+08:00

SCTP設計的目的是為了提供更快速的而且更可靠的、更多功能性的signaling transfer

因為比起UDP跟TCP來說：

UDP：unreliable、lack of congestion and flow controls

TCP：HOL delay、limited scope、can be attacked (SYN attack)

而SCTP可以提供一個reliable、不會有HOL delay、而且又快、可以使用multi-homed hosts、不會被DoS攻擊(4-way handshake)

＊ 現在的SCTP 提供了哪些功能？

* To ensure reliable, error-free, in-sequence delivery of user messages (optional).─ 可靠性

* To support fast delivery of messages and avoid head-of-line blocking.─ 快，沒有HOL delay

* To support network-level fault tolerance that is critical for carrier-grade network performance by using multi-home hosts.─network layer fault tolerance

* To provide protection against DoS attack by using 4-way handshake and cookies. – 4-way handshake

最近想好好讀的文件

2008-08-05T16:24:00.001+08:00

RFC 2960
RFC 3286

為什麼還不能完全靠Linux工作？

2008-08-02T02:35:00.001+08:00

MSN傳檔案及聯絡人的狀態

UAs under Linux use old msn protocol

我知道已經有人寫好plugin可以改進了，但是還沒有時間去試。
(2008/9/9 note)
pidgin-msn-pecan測試成功(Dabian: apt-get intstall; Ubuntu: modify sources.list and apt-get install....官網寫得很清楚)
記得修改msn account 的protocol為WLM(有些版本的pidgin不能修改protocol, 那就要砍掉重練…不是啦！是砍掉帳號，重新設定一個新的帳號)
(可顯示他人的狀態，但不能修改自己的狀態…部分可點對點傳輸檔案，不用經過msn server)

不會在Linux底下設定lab那台印表機…

有所謂的公用driver嗎？
ok了！…結果，居然是靠文仁傳給我Fedora上的driver才能成功…怎麼一回事？！

不能瀏覽XMS server上的powercam簡報(當然也無法錄製)

IE only....無言

Teaching Assistant Task!!!

2008-07-23T16:33:00.000+08:00

Compile cnaiapi

Windows:
(說在前頭。Visual studio express version要用Windows SDK真的有夠麻煩…
用正式版的就不用這麼麻煩了)
要用winsock2.h要和ws2_32.lib連結(在system32裡)
Project setting中設定library path
or 加入#pragma comment(lib,"ws2_32.lib")

記得設定路徑
tools->options->VC++ directories->(Show directories for)include files
c:\windows\system32

可以安裝Powertoy 的open command line here工具，在操作上會比較方便。

請先build library, 再build其它檔案，不然一定出錯。

Q:"invalid preprocessor command 'include_next'"
A:

Linux/FreeBSD:
Under compile_linux directory

請詳閱Readme並「按步就班」…XD

make cnaiapi.o
make apps

---
FreeBSD:
用gmake取代make
--
當助教要認真，不要亂回答問題，也不要用自以為專業的詞解釋給人聽，以免讓人失去對網路的熱愛。
7/23
--
試著練習寫比較複雜的Makefile
8/4

Pidgin Plugin

2008-07-18T19:44:00.000+08:00

cited:
FourDollars BlogMSN
-----
protocol for Pidgin

http://code.google.com/p/msn-pecan/ 這個計劃主要在專注在 Pidgin 當中對於 MSN 功能的改善
像是離線訊息、個人訊息之類的
Debian/Ubuntu/Gentoo 的使用者可以參考 http://code.google.com/p/msn-pecan/wiki/HowToInstall 直接安裝來使用就可以了
所以喜歡使用 Pidgin 的使用者還是可以直接享受到 MSN 的一些新功能喔~ :D

About DCCP

2008-07-18T19:40:00.001+08:00

DCCP(Datagram Congestion Control Protocol)

message-oriented
transport layer protocol

Adopted from RFC 4340
Design Rationale(設計原理
One DCCP design goal was to give most streaming UDP applications
little reason not to switch to DCCP, once it is deployed.
DCCP 其中一個設計目標就是讓大多數使用UDP協定的應用程式，在DCCO建置抵定後，都沒有理由不採用之。

 To facilitate this, DCCP was designed to have as little overhead as
possible, both in terms of the packet header size and in terms of the
state and CPU overhead required at end hosts.
為了達成此目標，設計DCCP協定時便考量了如何儘可能地減少封包表頭大小、狀態數目和終端主機的CPU荷負。

 Only the minimal necessary functionality was included in DCCP, leaving other
functionality, such as forward error correction (FEC), semi-
reliability, and multiple streams, to be layered on top of DCCP as
desired.

Different forms of conformant congestion control are appropriate for
different applications.  For example, on-line games might want to
make quick use of any available bandwidth, while streaming media
might trade off this responsiveness for a steadier, less bursty rate.
(Sudden rate changes can cause unacceptable UI glitches such as
audible pauses or clicks in the playout stream.)  DCCP thus allows
applications to choose from a set of congestion control mechanisms.
One alternative, TCP-like Congestion Control, halves the congestion
window in response to a packet drop or mark, as in TCP.  Applications
using this congestion control mechanism will respond quickly to
changes in available bandwidth, but must tolerate the abrupt changes
in congestion window typical of TCP.  A second alternative, TCP-
Friendly Rate Control (TFRC) [RFC3448], a form of equation-based
congestion control, minimizes abrupt changes in the sending rate
while maintaining longer-term fairness with TCP.  Other alternatives
can be added as future congestion control mechanisms are
standardized.

DCCP also lets unreliable traffic safely use ECN.  A UDP kernel
Application Programming Interface (API) might not allow applications
to set UDP packets as ECN capable, since the API could not guarantee
that the application would properly detect or respond to congestion.
DCCP kernel APIs will have no such issues, since DCCP implements
congestion control itself.

We chose not to require the use of the Congestion Manager [RFC3124],
which allows multiple concurrent streams between the same sender and
receiver to share congestion control.  The current Congestion Manager
can only be used by applications that have their own end-to-end
feedback about packet losses, but this is not the case for many of
the applications currently using UDP.  In addition, the current
Congestion Manager does not easily support multiple congestion


control mechanisms or mechanisms where the state about past packet
drops or marks is maintained at the receiver rather than the sender.
DCCP should be able to make use of CM where desired by the
application, but we do not see any benefit in making the deployment
of DCCP contingent on the deployment of CM itself.

We intend for DCCP's protocol mechanisms, which are described in this
document, to suit any application desiring unicast congestion-
controlled streams of unreliable datagrams.  However, the congestion
control mechanisms currently approved for use with DCCP, which are
described in separate Congestion Control ID Profiles [RFC4341,
RFC4342], may cause problems for some applications, including high-
bandwidth interactive video.  These applications should be able to
use DCCP once suitable Congestion Control ID Profiles are
standardized.

創見T630的歌詞顯示功能

2008-05-30T02:09:00.000+08:00

一切的一切，都得靠千千靜聽了!!
1.下載、安裝。
2.設定
請設定歌詞搜尋→儲存到歌曲所在資料夾→全部儲存

→播放歌曲時按右鍵搜尋歌詞(歌詞資料庫用預設的就可以了)
→搜尋→下載

→之後便可在歌曲所在資料夾找到對應的歌詞檔(副檔名為lrc)

→將歌曲及對應的lrc(歌詞檔)丟到mp3 player中

ok!!

Note:
有時候歌詞在MP3 Player上會無法顯示(外文歌詞比較常發生這種問題)，這時候可能是因為編碼的問題，可用Windows的記事本另存成ANSI encode, 再傳到MP3 Player上試試。

報告避噹法則

2008-05-30T00:26:00.001+08:00

The Greek AlphaBet!!

(老爺~我開玩笑的!!XD)

如何在PowerPoint簡報中加入Youtube影片

2008-05-30T00:13:00.000+08:00

1.檢視→控制工具箱→其它控制箱→Shockwave Flash Object→拉出你要顯示的大小
2.在拉出的物件上按右鍵，選屬性，編輯「自訂」欄位，貼上Youtube URL，但是URL要修改
修改EXAMPLE:
"http://www.youtube.com/watch?v=4yzUxNbi1h4"→"http://www.youtube.com/v/4yzUxNbi1h4"
(說明：去除watch? 和v後方的= 並在v前後加上slash)
OK!!在放映投影片時即可收看。(當然一定要是在online status啦~)

Ref:
http://www.youtube.com/watch?v=4yzUxNbi1h4

Network History

2008-04-16T23:54:00.000+08:00

為什麼IPv6傳送速率理論上會比IPv4快？
header長度相同(128bit)
不作checksum

-----
真實的網路傳送世界冠軍(IPv6 version)？
2.56gigabit per second
calculation
8.8*8)/(18*60)
Need to check on Internet2 research
----
為什麼加入repeater所形成的cycle就不會發生broadcast storm?

How to read technical documents?

2008-04-14T04:47:00.000+08:00

Key points:

設計動機與核心概念：這個系統為何被提出？基於什麼想法去建構整個系統？
適用對象與限制：沒有完美的軟體，只有合用的設計
功能概況：不需要熟記每個章節，但需要在腦海中建構一套索引
範例或樣品程式：如果時間允許，請試著驗證

Reference:
Jserv's blog:對自己好一些：談技術手冊閱讀

校園網路下搭配MySQL和LDAT之垃圾語音防護系統

2008-04-14T04:39:00.001+08:00

TITLE:Countermeasures of Spam over Internet Telephony in SIP.edu Campuses with MySQL and LDAP Support

Author: Senior ChangYu Wu

Reading Motivation: for SIP.edu

Note:
need adding.....

小結：簡短的心情留言

2008-04-14T00:44:00.000+08:00

一路走來，回頭看之前的那些筆記，有錯謬，有感慨，不過都在在證明當初有記錄下來是正確的！

tintin

Multimedia 期中報告

2008-04-14T00:41:00.000+08:00

Paper Reading

Preamble:

找什麼樣的paper好呢？
對聲音的資訊隱藏還蠻有興趣的，有空去看一下泰國同學上次的簡報好了。或許也可以跟他們討論一下。

---
btw, Thursday 聽了Fanjia的簡報後，覺得3/8的隱藏率(?)還蠻高的。

TCP/IP Homework

2008-04-14T00:34:00.000+08:00

TCP/IP 作業（兩人以下一組）

作業請email給助教：麥毅廷，wkb@wkb.idv.tw

作業一、 利用Socket相關之APIs，寫作Client-Server程式，Server須可同時服務多個Clients（應用程式類型請自訂）。

繳交內容： 1. 程式之原始程式列表（含中文註解）

2. 執行結果（含說明）

3. 程式說明文件（含程式結構及流程等）

繳交期限： 2008/3/25

作業二、 寫作Ping 程式

繳交內容： 1. 原始程式列表（含中文註解）

2. 執行結果（含說明）

3. 程式說明文件（含程式結構及流程等）

繳交期限： 2008/4/22

作業三、 寫作Traceroute 程式

繳交內容： 1. 原始程式列表（含中文註解）

2. 執行結果（含說明）

3. 程式說明文件（含程式結構及流程等）

繳交期限： 2008/4/22

作業四、 寫作Shortest path finding之程式，包含：1. Bellman-Ford algorithm, 2. Dijkstra’s algorithm

繳交內容： 1. 原始程式列表（含中文註解）

2. 執行結果（輸入一Graph，列出選定節點到其他節點之最短路徑）

3. 程式說明文件（含程式結構及流程等）

繳交期限： 2008/5/20

作業五、 利用mrouted程式，建立實驗型Multicast網路，並且寫作Multicast 傳輸（send）與接收（receive）程式以測試該網路之Multicasting功能。

繳交內容： 1. 傳輸與接收程式之原始程式列表（含中文註解）

2. 執行結果（含說明）

3. 程式說明文件（含Multicast網路架構，程式結構及流程等）

繳交期限： 2008/6/17

TCP/IP Midterm points

2008-04-14T00:13:00.000+08:00

UDP如何做checksum?(hint. pseudo header)

classful and classless 的subnetting計算

subnet and supernetting

....
Ref:
（永遠的）鳥哥

RFC 793:TCP

self-similar and Ethernet

2008-04-09T20:05:00.001+08:00

Still very confused the connection between them......

暫時的理解：

在測Ethernet大量流量時，運用統計學中的self-similar concept去解釋流量的邏輯，比傳統用機率中的poisson解釋還準！
（真是不夠專業的理解啊～XD)

與 congestion control有關
與Queueing Models(single server queue)有密切相關...開始後悔當初排隊理論不夠認真了…

Conclusion:
buffer size 要較傳統model(Poisson Model)預設值大。(如何得來之結論呢？冏||>)

ps.
Delay Type

Transmission Delay
Propagation Delay
Processing Delay
Queueing Delay

創見T.630錄音

2008-02-25T21:06:00.000+08:00

How to record?
長按REC鍵兩秒，開始錄音
錄音中按play(大圓)暫停錄音。
錄音中長按REC鍵，停止錄音

(記給自己看的)

Sepcial Topics of Computer Network note

2008-02-21T15:40:00.000+08:00

paper list:

Selected Papers

1. "A Minimum Delay Routing Algorithm Using Distributed Computation," [Gallagher 1977]. In this paper, the multipath routing problem (of determining at each node, the fraction of traffic destined for a given destination that should be routed over each of the node’s outgoing links) is formulated as an optimization problem. An iterative, distributed algorithm in which marginal delay information is passed to upstream nodes, which then readjust their routing fractions, is shown to converge to minimize the overall average cost (e.g., delay) in the network. This paper (as well as [Kelly 1998] below) are nice examples of how network protocols (e.g., routing, ratecontrol) can be naturally derived from well-posed optimization problems.

2.政霖 "The Design Philosophy of the DARPA Internet Protocols," [Clark 1988]. This paper provides a thoughtful retrospective view of the goals and design principles of the Internet architecture and its protocols. It has been a favorite among students in my networking classes, and paired with [Molinero-Fernandez 2003] has made for many lively and interesting class discussions.
3. "A Calculus for Network Delay, Part I: Network Elements in Isolation; Part II: Network Analysis," [Cruz 1991]. During the 1990’s, there was considerable foundational research on providing quality of service guarantees for flows that are multiplexed within the network. This paper describes an elegant "calculus" that provides provable worst-case performance (delay) bounds on per-session, end-end performance. Many important works followed this seminal work; a nice survey is [LeBoudec 2001].
4. "A generalized processor sharing approach to flow control in integrated services networks," [Parekh 1993]. In many ways a companion paper to [Cruz 1991], this two-part paper demonstrates how provable per-node and end-end persession performance bounds can be guaranteed, given a weighted fair-queueing discipline at each node.
5. 汎嘉"Equivalent capacity and its application to bandwidth allocation in high speed networks," [Guerin 1991]. The notion of effective bandwidth, an approximate characterization of the queueing behavior of a session when multiplexed with others, was developed by numerous researchers (see, e.g., [Kelly 1996]) throughout the 1990’s. This early paper introduced me to the idea, and sparked my interest in the area.
6. 筱婷"On the self-similar nature of Ethernet traffic (extended version)," [Leland 1994]. While the notion of long-range dependency, self-similarity, and heavy-tailed distributions are now a standard part of the lexicon of those interested in traffic characterization and descriptive network models, this paper introduced these ideas widely, launching many subsequent research efforts that have taken such an approach towards modeling.
7. "Sharing the cost of multicast trees: an axiomatic analysis," [Herzog 1997]. Axiomatic methods, in which one poses a desired set of system properties or behaviors, and then develops a protocol that meets these properties (or proves an impossibility result – that there is no protocol that meets the requirements) is a well-known technique in fields such as mathematical economics and social welfare theory. This paper was an elegant application of this set of tools in the networking domain.
8. 筱婷"Rate control in communication networks: shadow prices, proportional fairness and stability," [Kelly 1998]. This paper formulates the rate control (congestion control) problem as a problem of allocating bandwidth to flows so as to optimize overall system "utility," showing that Jacobson’s TCP congestion control protocol (developed 10 years earlier using tremendous engineering insight) can be naturally interpreted as a distributed algorithm that iteratively solves this global optimization problem.
9. "Multicast-based Inference of Network-Internal Loss Characteristics," [Caceres 1999]. Many research efforts in network measurement through the mid-to-late 1990’s were descriptive in nature – taking active or passive measurements at various points in the network, and interpreting the observed performance (e.g., packet delay, packet loss, aggregate traffic mix, or throughput). This paper elegantly used statistical methods (maximum likelihood estimation) together with end-to-end measurement data to infer the (unseen) topology of the network between the measurement endpoints. Inference techniques have since become an important and widely-used part of the measurement toolkit.
10. 嘉裕"Internet indirection infrastructure," [Stoica 2004]. It’s been said (in a quote often attributed to Butler Lampson) that nearly every problem in computer science can be solved by adding another level of indirection. I had always thought that this quote applied to data structures and algorithms. This paper, however, opened my eyes to how indirection can be used in an elegant and clean distributed network architecture for providing a variety of overlay services

Papers need reading

2008-02-21T15:30:00.000+08:00

[VoIP class]
End to End Performance Initiative
Motivation:

網路太分散，不好管理
Internetworking
PMP
找出bottleneck,通知正確管理者處理(cf.GDT module)

Open question
imcomplete data?
rank multiple results?
-----------

GDT relevant...spec....(need reviewing)

paper format relevant document...

How to evaluate a system?

2008-02-21T15:28:00.000+08:00

如何去評估一個系統呢？

Application
Architecture
Protocol

JQuery notes

2008-02-19T13:44:00.000+08:00

How to combine JQuery with JPGraph to graph real-time SIP packets transmission figures?

.....

LNCS format

2008-02-13T00:26:00.000+08:00

link

reference:
SIP-Based Adaptive Multimedia Transmissions for
Wired and Wireless Networks
--
格式是展示你專業的地方。

What is GDT?

2008-02-13T00:09:00.000+08:00

[Weekly Report]2008.1.19-2007.1.25

2008-02-04T05:37:00.001+08:00

1.Learn PHP graphing:
1.1 I surveyed PHPGD and found that it is too difficult to graph data
in database using PHPGD.
After surfing web, I finally choose to try a PHP graphing library:
JPGraph. Easy using, object-oriented programming...etc,are its
features, and I test it and feel that is true.
1.2 Show some test pages below:
test1:my winter-vacation plan
<http://tintin.no-ip.org/plan.php>
Just a basic usage. JPGraph has many examples. I think Gantt-chart is
the most likely what I want, such as a call flow. So I practice using
its object,GannttGraph, and the accompanied functions to graph.
test2:my weight record(using data in remote database)
<http://ms11.voip.edu.tw/~martensite/health.php>
Combine the remote query and PHP graph, I setup a personal
weight-record system for myself. I can add record and see the trend of
weight.

2.Arrange what I should prepare for my research:
As the page:<http://ms11.voip.edu.tw/~martensite/todo.html>

3.SIP peering affair:
3.1. Reply the request of peering. Tell them our server and list our
labmates' SIP number for them.
3.2 I want to setup the routing rule between peers, so I sent to Karn
to ask for add an test account for us.

[Weekly Report]2008.1.12-2007.1.18

2008-02-04T05:35:00.000+08:00

1. MySQL Remote Query:
1.1 How to test:
In order to learn the MySQL database, I designed the experiment
environment. Because I can grant any privilege on my own server, I
chose to set-up the database on the other server(in this task,it is
ms11.voip.edu.tw) and try to connect to that one. First, I tried to
query in the localhost mode. When I make sure the local query is OK,
it represent that I learned MySQL query language fine. Second, I
upload the php files to ms11 server, and modified the files with the
connection details. I use a php file storing these connection data and
include it in every query php file.
1.2 Test:
* test1<http://tintin.no-ip.org/Database/Lab/index.php>
test1 is the simplest test for MySQL. Just test connection of MySQL
database and the database creation,modification,deletion using PHP
script language.
* test2:Remote Query(ms11 query to tintin.com)
<http://ms11.voip.edu.tw/~martensite/Database/show_all.php>
test2 is for remote query test. It works fine, but I grant all
privilege to the remote user. It need modifying.
1.3 What I have learned:
In the learning process, I learned the privilege concept of MySQL.
I finally know why I can not connect to the ms11 database from my
server. I think the manager confined me to local query.

[Weekly Report]2007.12.29-2007.1.4

2008-02-04T05:34:00.001+08:00

1.Continue trying the logging of OpenSER:
Try and try again. And I found I forgot set the debug level. After
reading through the doc, I can get the concept of debug level, but
can't map it to what I should do.
2. Finish my AWK little program:
I really feel I CANNOT learn to write any program because of the
four-year frustration. Shell-script programming is really suitable for
the "newbie" as a starting point.
3.MySQL remote access:
I added a user as a normal one in the MySQL database and write a
little PHP webpage to access the data(just list the data).

--------------------------

SIP.edu測試

2008-01-30T15:52:00.000+08:00

2008.1.30
martensite@voip.edu.tw
unavailable
ms11沒有rewrite "to" header
有513 "Message too big" ack
warning:392 Noisy feedback tells:....
還以為設了alias=voip.edu.tw就能解決(這是參考文仁網站上的technical doc.)
猜測：說不定是我改錯設定檔了…還要再問學長。

PSU peering test

2008-01-25T18:43:00.000+08:00

Peering Test
環境：
Home:
Xlite, 23200@163.22.20.154
Lab:
Twinkle,202.28.99.205

TEST (2008.1.25)
從PSU打到NCNU可以，NCNU打給PSU server就不行。用回撥的也不行。

TEST(2008.1.30)
無法在泰國server註冊。
(沒有開？所以應該也是測試用的server吧？)
猜錯了！因為有收到server給我的404 not found....

TEST(2008.1.31)
寄信給Killy後，OK!
(但是我現在沒辦法接你電話啊！抱歉)
(在家還是無法在PSU SERVER註冊。因為網域不支援？)

[Weekly Report]2007.12.22-2007.12.28

2008-01-04T11:10:00.001+08:00

1.Prepare the term projects of VoIP Measurement and Web Technology.
2.Try logging of OpenSER:
2-1. Read the document: OpenSER - Debug and syslog messages
<http://www.voice-system.ro/docs/ser-syslog/>
2-2. I tried to use the simple log function to record how many INVITE
packets passed my proxy server. Try and error, and finally it worked!
(HAHA!) I think I can combine the result of the log file with my term
project topic, MRTG , to get a visualized report of SIP call flow.
2-3. The second try of the log function is to log how many successful
call have established. I discussed with Wen-Jen, we think maybe we can
log how many ACK packets. I put the log function in somewhere in the
main route, but it didn't work. The task is not finished.

[Weekly Report]2007.12.15-2007.12.21

2008-01-04T11:09:00.001+08:00

1. Settle down the SIP Fluoroscope System on three servers:
1.1 On my own Linux server, it runs well. But there is still one
problem. The PHPGD module cannot be loaded well, so I can't not move
on the path to draw the flow of call using MRTG.
1.1.1 This week, I found that I should use sudo to compile the C
program captures packets. (Reply to the teacher question in the last
weekly report)
1.1.2 Before this week, I compiled, and failed, and I even didn't know
I failed.
1.2 On the ms11 server, it (still?)runs well.
1.3 On the iPBX server, the system can capture the packets,and store
them in the MySQL database. The webpage can show the packets, but not
so-called real-time. There must be something wrong, and the key
problem might be AJAX. Still debugging. I use a useful Firefox
plugin,Firebug, to debug the javascript code. The error message shows
that there is a function in Sajax not defined. But I check the Sajax
is the same as others on the other Linux server(my own server).
2. Struggle with the logging of OpenSER:
It must seems very simple for the demon(取其「高手」意), but I am 苦手(日語). I
tried to insert some log functions in the OpenSER configuration file,
but the message didn't show up in the log file. I must put them in
the wrong places. I walked around the forum, and get a
tutoria<http://www.voipuser.org/forum_topic_8040.html>(I would like to
call it a reading queue for knowing OpenSER). And I consulted Wenjen,
he advised that I should read the OpenSER Core Cookbook and "OpenSER
Pseudo-variables" document to know how to program in the configuration
file. There are too many things on my TODO list.

[Weekly Report]2007.12.8-2007.12.14

2008-01-04T11:08:00.000+08:00

1.Implementation task:
1-1.Try to compile the Sipfluoroscope system program in Linux system.I
compiled with wrong option and failed to link the need library and get
right execution file. It is ok now! But it is very strange that the
mysql database cannot get the data capture from the the Sipfluoroscope
system.
1-2.Try to get the the Sipfluoroscope running on the ipbx.ipv6.club.tw
server. As you saw, I am not very familiar with the *UNIX command and
system.

[Weekly Report]2007.12.1-2007.12.7

2008-01-04T11:07:00.000+08:00

Weekly Report
1.SIP server using OpenSER:
Authentication setup is ok!
2.SIP.edu document reading:
SIP.edu Cookbook reading task is over.<http://mit.edu/sip/sip.edu/ >
------
Reply to your instruction(last weekly report reply):

>Is "SIP Fluoroscope" running on iPBX now?
Ans:Not yet.
I need time for this task.
>You must have gotten your OpenSER running.
> Try to figure out its support on logging.
>(Similar to SIP Fluoroscope, but not so tedious.)
Ans:When my server reboots, the OpenSER restart automatically.

>Have you finished reading SIP.edu documents?
> Please prepare a webpage to describe our system like
>http://www.ethworld.ethz.ch/technologies/sipeth/notes
>(You may also refer to the "Notes" of other universities
>to prepare ours.)
Ans:I will explain this task below(in Chinese paragraph).
>Let me know the progress of the above items, so that we can discuss
>the draft of your final report.
----
Other things:
ps.因為學校信箱不太穩定，所以本週週記改由Gmail信箱寄出，以後也是。
-----
親愛的老師:
因為家裡有點事，
這週四晚上我決定隔天旁聽完資網課後回家一趟。
還很樂觀地以為回到家大概才下午三四點，
應該可以很悠閒地看著太陽下山完成週記，
結果這週屏東人特別愛家，
台中朝馬國光客運車站三分之一以上的人都是要搭車回屏東的乘客，
國光客運在下午四點還特別加開加班車把熱血愛家的人們運回家，
不過我連加班車都沒坐到回到家時都已經晚上八點了。
心裡還是惦記著週報沒寫，
看了一下在客廳的無線router燈是亮的，
想說一會兒跟家人寒喧完就可以寫了，
可是媽媽突然說因為家裡平常根本沒人用電腦(我和妹妹都在外地)
所以他把ADSL網路給停了......
這是我這週五的經歷，也是週報沒有準時交的原因。

這兩個禮拜我的工作日誌上的空白欄很多(我將一天分成三個區塊來紀

錄進度)
除了因為一直感冒(running noise)還有其他的原因，
有家裡的事和自己心裡的事，
還有，我的SIP.edu for NCNU簡報及建置網頁的專題報告都還沒動是因為在看了它校的note網頁後，
覺得我們實驗室SIP server的作法跟正規的機制好像差很多，
那天下午跟學長討教　覺得我們實驗室好像只有把兩個資料庫用一個flag(boolean type)結合，
或許是我還沒了解透徹也或許我們真的是用非常簡化的方法去implement SIP.edu mechanism，
我問自己　為什麼不去搞清楚，
答案可能是我覺得我已經懂了，
可是兩者機制的確不同　報告該怎麼寫，
就是這樣顧慮東顧慮西　所以拖拖拉拉沒有進度，
SIP.edu　cookbook的網頁資料從目錄結構到最後我看了好幾遍，　但是有看沒有懂，　所以不敢寫在週報裡。

iptables notes

2008-01-04T11:05:00.000+08:00

Motivation:
學這個要幹麻？除了要專題的學分外，對我自己和對研究有什麼幫助？
(筆記待補完…)

Firefox好用元件

2007-12-13T11:09:00.000+08:00

Oak Vocabulary
----

Firebug

[Weekly Report]2007.11.24-2007.11.30

2007-12-04T20:52:00.000+08:00

1.Reading Tasks:
1-1.Paper reading:
MOJTABA HOSSEINI,etc.., UNIVERSITY OF OTTAWA, "A SURVEY OF APPLICATION-LAYER MULTICAST PROTOCOLS",IEEE Communications Surveys & Tutorials:
Just in the beginning. I read it to clarify the concept of multicast. I can realize unicast and broadcast easily, but multicast always confuses me.

1-2.Read some sections about security issues of "SIP Tutorial by Jiri Kuthan and Dorgham Sisalem":
I want to get the overview of SIP authentication mechanism and DOS of VoIP.

2.Implementation Tasks:
Install OpenNMS on Windows operating system.
Just install. Try it for fun.
It features for its functionality which can compare with enterprise softwares but it is open source. I feel that it seems to be likely to the MRTG(I mean the report and setup methods, but it remains for me to dig the core function of it).

3.Web Technology's Homework:
Paper Reading:
http://hsiao-ting.blogspot.com/2007/11/web-teconology-hw4-web-robot-study.html

4.Obstacles I met this week:
4.1 PHPGD can not be installed on my Linux environment....but I supposed it should work well in PHP5 version default. (The browser always displays a fatal error to me said,"The function is not found.")
4.2 Anxious about SIP network report for our lab(my undergraduate project)

有關IPv6

2007-12-03T23:34:00.000+08:00

Windows XP 預設沒有啟動IPv6，需要手動啟動。
在假DOS下鍵入
ipv6 install
即可。

如果想要關閉的話，請鍵入
ipv6 uninstall
(有時候使用IPv6的話，網路會變得比較慢。)
----
不知道到底有沒有啟動，請鍵入
ipv6 if
----

進入某些server時會限制沒有啟動ipv6的client進入，所以要記得啟動，雖然Windows XP這個IPv6是假的！
---
有點軟的有點囉唆(完整)說明

How do I install the IPv6 protocol for Windows XP?

To install the IPv6 protocol for Windows XP with SP2, do the following:

1.	Log on to the computer with a user account that has privileges to change network configuration.
2.	Click Start, click Control Panel, and then double-click Network Connections.
3.	Right-click any local area connection, and then click Properties.
4.	Click Install.
5.	In the Select Network Component Type dialog box, click Protocol, and then click Add.
6.	In the Select Network Protocol dialog box, click Microsoft TCP/IP version 6, and then click OK.
7.	Click Close to save changes to your network connection.

Alternately, from the Windows XP desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt. At the command prompt, type netsh interface ipv6 install.

For the IPv6 protocol for Windows XP with SP1, do the following:

1.	Log on to the computer with a user account that has privileges to change network configuration.
2.	Click Start, click Control Panel, and then double-click Network Connections.
3.	Right-click any local area connection, and then click Properties.
4.	Click Install.
5.	In the Select Network Component Type dialog box, click Protocol, and then click Add.
6.	In the Select Network Protocol dialog box, click Microsoft IPv6 Developer Edition, and then click OK.
7.	Click Close to save changes to your network connection.

To install the IPv6 protocol for Windows XP with no service packs installed:

1.	Log on to the computer running Windows XP with a user account that has privileges to change network configuration.
2.	Open a command prompt. From the Windows XP desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt.
3.	At the command prompt, type ipv6 install.

Regardless of the version of Windows XP, to use RPC applications over IPv6, you must first restart the computer.

====

另，若想要在Linux 底下關閉IPv6支援，請
Referece Link:
IPv6 for Microsoft:FAQ

PHPGD

2007-11-27T15:37:00.000+08:00

Def:
PHP script用來畫圖用的一個library.
(問：Library 和API到底在定義上和實際上有什麼不同？那天吃飯在討論，但是沒搞懂。）

Reference:
---------------
PHP:Image

中文指引
PHPGD.com

[Weekly Report]2007.11.17-2007.11.23

2007-11-26T02:29:00.000+08:00

1.Reading Tasks:
1-1."Carrier Grade Voice over IP," p222-230
1-2.SIP.edu cookbook:From the beginning to User Agents section
But some parts of that still confuse me, like how to set the routing rules for SIP.edu mechanism.

2.Prepare for midterm of VoIP measurement.
3.Homework of Web Technology:
Study the search robot(a related paper or a search tool)
---
4.and fight against the cold virus....

OpenNMS on M$ Windows note

2007-11-23T20:34:00.000+08:00

install instruction:link

tintin評：好裝

Web Teconology HW4-web robot study

2007-11-22T10:38:00.001+08:00

Web Technology HW4

Web Robot Study

Paper Reading:

Monika R. Henzinger(Google Inc.),

“Hyperlink Analysis for the Web”,IEEE Internet Computing

本篇是由Goole網路公司的一位員工所撰寫的surey 型論文。主要提出一種搜尋引擎可使用的演算法。

＜Kleinberg’s Hyperlink-induced Topic Search(HITS) Algorithm＞

如何去定義一個連結(或稱網頁)與你所鍵入搜尋列的相關度？又如何定位一個連結的屬性為何？以本身使用搜尋引擎的經驗來說，在yahoo奇摩搜尋時，搜尋結果排序在前面的較為可能是其它搜尋引擎的此關鍵字相關頁面，而Google在排序搜尋結果時，會把較為人常用的網頁排在前頭。雖然不知道這兩大搜尋引擎排序的遊戲規則為何，但是對照這次作業所讀的論文，好像兩者有一定的相關。在論文中提出，有兩大類的連結類型。一類是Authority Links，一類是Hub Links。Authority Links指的是此連結（也就是論文中所示之node節點）有許多的indegree nodes，且這些indegree nodes因著重要性不同會有不同權重；Hub Links則是outdegree nodes 很多，像Hub集線器般將很多網頁集合起來。這兩類型的連結在茫茫網海中都可以算是優質網頁，也是各大搜尋引擎會優先列出的搜尋結果。

＜The Key Power of HyperLink Analysis＞

這樣的分類突顯了網際網路上的資訊檢索與傳統的資料庫或資料收集系統的差異。在網際網路中，一個網頁是否有價值，不只和它本身的內容有關，更具判斷力的準則在於：它與其它網頁（尤其是那些具有指標性的網頁）的相關度如何？母以子（子連結）貴也好，子以母貴也好，想要成為一個好的網站就是要朝這兩個方向努力：成為一個收集某領域的資訊中繼站，或者，內容棒到讓權威性網站不得不為你多設一個超連結，讓你成為它們的延伸閱讀。

[Weekly Report]2007.11.10-2007.11.16

2007-11-18T00:48:00.000+08:00

1.Reading Tasks:
1-1."Carrier Grade Voice over IP," p215-222
And I also review chapter 1~2 to prepare for themidterm of the class, VoIP Measurement

1-2. RFC3261 section 22
In order to learn the authentication of SIP, I study section 22. In the OpenSER configuration file, it has the implementation codes for the specification authentication. I am glad to find it. (It seems that I can "trace code"?!)

2.Implementation Tasks:
2-1. Learn how to update the MySQL table which is storing the mapping between username and phone number.

2-2.The SIP server can do the authentication work, but the users on the server cannot call others. The users can register and get the other one call him. I also catch the packets between the call flow. When the registered user calls out, no packet comes from the user agent.
(And I also tried two scenarios: using private IP and public IP. When I use public IP, I even can't register on the the SIP server with IP:163.22.20.154. The gnome package for VoIP,Ekiga said, "There is other program listening the port. You cannot make a SIP call.")
The set-up of SIP server seems so easy for others and it is so difficult for me. Why?(Work hours:over 16 hours this week...not including my co-worker's:wenjen)
==============================================

Aaron Solomon using FreeBSD 6.2

寄給 Hsiao-Ting

顯示詳細資料

11月27日

Dear Hsiao-Ting:

I am puzzled by what you wrote in your report: "When I use public IP, I
even can't register on the the SIP server with IP:163.22.20.154."
Because you did not specify the UA you were using, I was unable to check
that for you.

Please try to write down the problem which you encountered, so that we
can discuss how to solve it.

The key to solve a complicated problem is always "Divide and Conquer".
Try to isolate the problem. Try to find out whether the problem is on
the server or on the client. After you divide the problem into many
small pieces, you will find it easier to handle in the smaller scale.

With best regards,
Solomon
Nov. 27

OpenSER Note

2007-11-13T16:52:00.000+08:00

1.修改/etc/default/openser
第一行改成yes

2.啟動
sudo /etc/ini.d/openser start

(啟動認證模組)
3.建立SQL table
shell script 檔放在/usr/sbin/openser_mysql.sh
/usr/sbin/openser_mysql.sh create
建立資料庫(表)

4.將openser.cfg檔案中下列行去掉註解
loadmodule "mysql.so"
loadmodule "auth.so"
loadmodule "atuh_db.so"
modparam("usrloc","db_mode",0)
modparam("auth_db","calculate_hal",yes)
modparam("auth_db","password_column","password")

5.將/etc/openser/openserctlrc中的HAS_SERWEB="yes"這行去掉註解註記，才能增加三個以上的subscriber.

6.openser在mysql中會建立使用者openser,若密碼鍵入openserro則為唯讀使用者，openserrw為可讀寫的使用者。

7.可看/var/log/openser.log來debug
(tail -F openser.log可即時更新log檔)

About User Agent:

X-lite:在Linux底下的X-lite常常在設定SIP server資訊時，發生記憶體區段錯誤，而且開啟時很慢。如果以console介面用指令開啟會比較穩一點。

看了好幾篇X-lite Forum，發現作者對Linux版本開發並不積極，所以bugs很多應該…不意外。

Ekiga:只要換了Public IP就不能在163.22.20.154 SIP server註冊。

要改監聽port

→gconf-editor(組態編輯器)→apps
→ekiga
→protocols
→sip
→listen_port
→改成非5060的值(range在5060~5100之間即可，我設成5070)
(11/27)改了也不行

(X-lite會自動找可用的監聽port)

Twinkle蠻好用的(Twinkle0.9)

System setting->listening port要改(e.g.5061)

CISCO 7960上記得Authentication name也要設置才可註冊。

[Weekly Report]2007.11.3-2007.11.9

2007-11-09T10:35:00.000+08:00

1.Reading Tasks:
1-1."Carrier Grade Voice over IP," p209-215
1-2. RFC3261 section 13
1-3. Paper Study:
SIP.edu white paper
http://www.internet2.edu/sip.edu/docs/sip.edu-whitepaper1.pdf
It seems a interesting project. I want to say "SIP me "in the near future.
2.
2-1.The SIP Fluoroscope system works in the "ms11.voip.edu.tw"!!!

2-2.Establish a SIP server on my computers in the dormitory and lab. But there is something wrong with load authentication modules.(Everyone can make a call through my proxy server,so obviously the authentication failed.)

3.VoIP Homework
VoIP HW2-如何確保RTP header 中SSRC欄位的獨一性？
<http://hsiao-ting.blogspot.com/2007/10/voip-hw2-rtp-header-ssrc.html>
----
老師：請問我該學的是用PHP language畫像MRTG那種流量圖，還是動態的call-flow圖呢？最近在逛AJAX和PHP的網站，所以想先問一下哪些是我可以在survey時多看兩眼的主題。
=====================================

Aaron Solomon using FreeBSD 6.2

寄給 Hsiao-Ting, changyu, wenjen

顯示詳細資料

11月12日

On Thu, Nov 08, 2007 at 03:10:42PM +0800, Hsiao-Ting Wang wrote:
> 1.Reading Tasks:
> 1-1."Carrier Grade Voice over IP," p209-215
> 1-2. RFC3261 section 13
> 1-3. Paper Study:
> SIP.edu white paper
> http://www.internet2.edu/sip.edu/docs/sip.edu-whitepaper1.pdf
> It seems a interesting project. I want to say "SIP me "in the near future.

Check with Chang-Yu to understand which MySQL table is storing the
mapping between username and phone number, and learn how to update the
table in the future.

> 2.
> 2-1.The SIP Fluoroscope system works in the "ms11.voip.edu.tw"!!!

How about the one on "iPBX.ipv6.club.tw"?

> 2-2.Establish a SIP server on my computers in the dormitory and lab. But there is something wrong with load authentication modules.(Everyone can make a call through my proxy server,so obviously the authentication failed.)

Check with Wen-Jen to learn how to set up the authentication module
successfully.

> 3.VoIP Homework
> VoIP HW2-如何確保RTP header 中SSRC欄位的獨一性？
> <http://hsiao-ting.blogspot.com/2007/10/voip-hw2-rtp-header-ssrc.html>
> ----
> 老師：請問我該學的是用PHP language畫像MRTG那種流量圖，還是動態的call-flow圖呢？最近在逛AJAX和PHP的網站，所以想先問一下哪些是我可以在survey時多看兩眼的主題。

Try to learn "PHP GD" (http://www.php.net/gd) first, and then try to
install a MRTG on your own server. After that, we can discuss what
further tools you need to learn.

With best regards,
Solomon
Nov. 12

AJAX note

2007-11-06T22:18:00.000+08:00

SAJAX
XAJAX

Ajaxian

To myself:
Need to practice coding skills about AJAX and become an Ajaxian. It is my task.

SIP Fluoroscope(SIP透視鏡)安裝程序

2007-11-05T13:34:00.000+08:00

實作環境：
FreeBSD 5.4-RELEASE

前置作業：
架好SIP server(e.g.SER or OPENSER)並啟動服務
→在MySQL建立資料庫並資料表，以存放封包表頭內容(有table.sql檔案可匯入)
→在init.php中設定資料庫名稱及將登錄資訊設置妥當

$DB_HOST = 'localhost';
$DB_USER = 'martensite';
$DB_PASSWORD = '';
$DB_NAME = 'test';

→改各個檔案的路徑
(2007.11.6淩晨註：我稍稍改了檔案，結果不用改路徑就能用了。所以之前在耍笨。:D~不過，還是留著好了，因為此時此日程度很差的我可是研究了很久呢…還有，學長將檔案分成兩個不同的資料夾放的原因為何？是有特別用意或只是懶得改…不解！)
(11.6早上：我錯了！一定要放兩個資料夾，但現在還沒時間改…)

query.php

require_once("/home/martensite/www/sipmagnifier/init.php");

detail.php

require_once('/home/martensite/www/sipmagnifier/init.php');

dissector_lite.php

require_once('/home/martensite/www/sipmagnifier/init.php');

makepcap.php

require_once('/home/martensite/www/sipmagnifier/init.php');

mailpcap.php

$header .= "From: \"SIP Fluoroscope\"<martensite@ms11.voip.edu.tw>\n";//設定信件來源

啟動：
refer to this.

下載點：
完整檔案下載
(.zip檔,密碼請來信索取)

如安裝成功，成果如下列網站：
SIP Fluoroscope System
(請按Enable Live Update可得到即時封包訊息)

Todo List:
把路徑改回來
研究如何在開機時自動啟動此系統(in FreeBSD and Linux)

待學習

2007-11-05T10:06:00.000+08:00

1.加強程式能力(PHP.C語言)
2.Linux OS的熟悉度
3.分散式系統相關研究(切勿閉門造車)
4.語文能力
5.表達能力(口語、寫作)
----
Detail
1.php畫圖(流程圖？call flow.動態→那PHPit就不行了...)
-phpGD
2.同時存取多個資料庫並作交叉比對

[Weekly Report]2007.10.27-2007.11.2

2007-11-04T05:42:00.000+08:00

1.Reading Tasks:
1-1."Carrier Grade Voice over IP," p196-209
1-2.RFC3261 section 12~13.2(Finally,I choose to skip some parts which are too detailed)

2.After discussing with sepp,I got something clear that I misunderstood before. Rewrite a easy implementation flow chart for myself to check. This week, the SIP Fluoroscope system can catch SIP header
in the database of my own, but the web-oriented user interface with AJAX technology doesn't work. I believe that something I ignored led to the failure.

3.Web Technology Homework:
3-1.Web Teconology HW3- paper study about HTTP protocol performance enhancement
Study Paper:
Network Performance Effects of HTTP/1.1, CSS1, and PNG
<http://hsiao-ting.blogspot.com/2007/10/web-teconology-hw3-paper-study-about.html>

SIPp note

2007-11-01T01:59:00.000+08:00

在Debian/Linux下安裝SIPp

前置作業：

On Linux/Debian systems (or any system where dpkg is installed), you can get all pre-requisites for SIPp by doing:

apt-get install gcc-c++
apt-get install ncurses-devel
apt-get install openssl-devel
apt-get install libssl-dev
apt-get install libnet1-dev
apt-get install libpcap0.8-dev
-----

2008/4/14
當初就寫了note,結果到上禮拜才真的安裝好。
不懂那時候在寫什麼意思的？

[Weekly Report]2007.10.20-2007.10.26

2007-10-26T12:16:00.001+08:00

1.Reading Tasks:
1-1."Carrier Grade Voice over IP," p190-196
1-2.A part of RFC 3550" RTP: A Transport Protocol for Real-Time Applications":
Read the document to improve the understanding of RTP and for the assignment of "the Measurement of VoIP".

2.Attend WiMAX Demonstration:
-----
The draft of review report is following:
1.事前準備不足：
預備期太短，讀的東西很少，後來發現一個很方便的方法，就是可以使用google提供的快訊服務，像WiMAX這種熱門的議題，每天的新聞很多，讓搜尋引擎幫忙收集，寄到信箱裡，標題有興趣的再去詳細讀，這樣效率不錯。
e.g.在展覽時有人說我們學校跟仁愛鄉合作的偏遠地區遠距教學計劃(由石勝文老師主導)，也是利用WiMAX連線，因為之前沒有讀過相關新聞，所以沒辦法很有把握地回應來賓的詢問。
2.太求好心切：
因為想把事情做好，做事很急，口氣就變差，所以有時候會沒顧到別人的感受。(正好印證了才說嘴就打了嘴，還敢說別人幹嘛這麼在意，最在意的其實是自己。我很怕被老師罵…)
3.學習合作的精神：
要學著只看自己的不足，忘記別人的失誤，這是很難的人生課題，一直都學不好。
4.溝通能力不足：
e.g.在最後一天下午構想3分鐘demo時，可能因為我太急了，沒有將細節想得很清楚，所以跟學姊溝通時只說個大概，跟嘉裕溝通時說得更是籠統，所以可能大家會錯意了，正式上場時會出包也就在所難免。雖然一心想要把事情做好，但是吃快打破碗更慘。
5.總務職責：
應該要事前將出差報帳相關注意事項調查清楚。
e.g.我們需要在會場明顯標的物處合照，以利報帳程序，但是因為不清楚這點，所以只照了其它攤位的展示，反而自己攤位和動態展示過程都沒拍到。

[Weekly Report]2007.10.13-2007.10.19

2007-10-25T17:14:00.000+08:00

1.Reading Tasks:
1-1-1."Carrier Grade Voice over IP," p175~190
1-1-2."Unix Programming Environment," 4-4:filter-awk
1-1-3. Website,"FreeBSD Developers' Handbook" :
<http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/index.html>

2. Implementation Tasks:
Practice some awk examples about processing method of the /etc/passwd file, like find the user with no password,select specific fields to print out,and some other format output of it.

3.Web Technology Homework:
3-1 Install Apache
http://hsiao-ting.blogspot.com/2007/10/web-teconology-hw2-install-and-study.html
3-2 Use the Netcat utility
http://hsiao-ting.blogspot.com/2007/10/web-teconology-h.html
4. Prepare for the WiMAX Demonstration:
Learn the cooperation skills from the course of preparation, even there are many emotional stories in it.:D

VoIP HW3- Socket Programming

2007-10-25T13:27:00.000+08:00

HW3
TCP

請寫出TCP Server的多重客戶端，來同時管理多個客戶端
Client可以傳送檔案到Server

多客戶端可用select()來實現。
如何上傳檔案？

UDP

每個Client端由鍵盤輸入字串，傳送給Server端時，
Server端要能顯示訊息是那一個Client所發送的

如何顯示是誰發送的訊息？

Reference:
Linux Socket Programming by Example
Socket Programming in C

VoIP HW2-如何確保RTP header 中SSRC欄位的獨一性？

2007-10-25T11:33:00.000+08:00

題目：
Read RFC 3550 to study how the protocol guarantee the global uniqueness of SSRC.
Draw a flow chart of the algorithm in a powerPoint file and send it to voip-ta@voip.edu.tw
Deadline: 11/7中午12點
(為什麼我每次都要把問題想得這麼複雜？？？？)

SSRC: Synchronization Source
32 bits
隨機選取，獨立於 IP address
用途：使一個RTP session 中的每個participant 都有獨一的識別資訊。
確保獨一性？RFC 3550 Appendix A.6

Note

MD5 routines (RFC 1321)其實就能確保兩兩RTP封包的SSRC值碰撞機率僅有百萬分之一。以下是實作時可用的functions：
getdomainname()
getwd()
getrusage()

Web Teconology HW3- paper study about HTTP protocol performance enhancement

2007-10-25T10:49:00.000+08:00

Study Paper:
Network Performance Effects of HTTP/1.1, CSS1, and PNG

本篇論文主要就著HTTP/1.1針對HTTP/1.0所作的功能改進，做一效能評估。
HTTP/1.0有一大部分的封包是用來建立及關閉連結，且因為TCP有slow start這個演算法，會用好幾個封包去偵測網路狀況，以達到最好的傳輸率。這麼多非主要payload的封包，是造成網路壅塞的一項主因。(以現行HTTP多採1.1的角度來看，1.0看起來像製造了很多不必要的垃圾封包。)

作者主要分成兩種網路常見的html embeded type來探討兩代的HTTP對其的影響。
1.CSS(Cascading Style Sheets)
2.PNG(Portable Network Graphics)
也研究了兩代HTTP對於傳輸資料(圖像)壓縮的支援及(解)壓縮的效能。

我的想法：
新一代的協定(HTTP/1.1)其設計動機當然就是改良現行協定(也就是論文寫作時的HTTP/1.0)，所以可以想見此篇論文的種種測試假設都會有好結果。
因為論文內容很多，老實說在這次作業繳交期限前沒辦法全部看完。看了一下論文架構，作者很著重地描述做了哪些測試，也將種種變因詳述，觀察他做實驗的做法，真的很有實事求是的精神，一次一個變因，一步一步記錄，這是一種很好的研究精神。回想自己常在測試程式時，一次改變好幾個地方，且以為出錯的不會是我改的那個小地方，結果改變了一組變因就突然可以運作，也就不能真正了解到底是調整哪個變數才是關鍵。

雖然是一篇十年前的論文，邏輯清晰、說理明白，應該可算是當代佳作，可以學習的地方很多。

關於Linux Distribution 的選擇

2007-10-25T01:46:00.000+08:00

當初在選Linux Distribution 時，單純是因為身邊有高手是Debian的愛用者，那時候連什麼是Linux都傻傻搞不清楚，就跟著用下去了。慢慢地懂了一點這個好像很難用的作業系統，也看了好多人說Debian是「高手」在用的Distro，自認程度很差的我，幾度想換其它的distro玩看看，但就是沒時間重灌。最近研究進度有點落後，壓力來襲之下居然開始亂玩別人研究領域的軟體，像sipp、linphone等等，因為實驗室的server延用FreeBSD當作業系統，所以有人的研究必須先學著在FreeBSD上把sipp裝起來，光是這一步對一般Unix-like OS的初心者而言就是個大工程，可是我花了10分鐘就把source code compile到可以使用。這都要歸功於Debian的套件管理太強悍，而且因為使用的高手多，所以幾乎所有open source的軟體都有人包成deb，比起Fedora，使用者只需花時間在學習使用軟體上，關於作業系統、檔案架構，只要有個基本認識就可以開始玩重點部分。

不過，我也不知道這樣好或不好，因為以後出了社會，在公司裡是一定要使用Linux，但distro就不能自己選擇了，所以好像也得學著一步一腳印編譯程式…

2008.1.15 Reference:
FourDollars Blog

Web Technology Homework Rule

2007-10-15T02:09:00.000+08:00

Turn in your report in class.
E-mail an electronic copy to me before deadline.
Deadline: 12:00 p.m. Sunday
Email subject: web-tech, homework#, student-id
Attached document format: ms-word (.doc) or acrobat (.pdf)
Make all your reports accessible through
http://www.ncnu.edu.tw/~youraccount/web_tech
老師的email:
hychen@csie.ncnu.edu.tw
----
寫作業都不看規則，會白做工。

Web Teconology HW2- Install and Study Apache

2007-10-14T17:04:00.000+08:00

Install Apache in Linux:
要在Linux上設立一個WWW Server需要的套件有下列幾項：
Apache
httpd
mysql
mysql-server
php
php-devel
php-mysql
(如果不是使用像apt之類會自動管理套件相依性的軟體安裝Apache,則需自行注意以上套件是否皆有安裝，否則Apache會無法使用)

都安裝好後網頁放置在/var/www.
Apache設定檔在/ect/apache/httpd.conf

Install Apache in Windows:
在Windows底下，因為之前就以安裝Appserv程式，所以以Appserv來說明這部分。
選擇版本為 AppServ 2.5.7 ，
內含
Apache 2.2.3
PHP 5.1.6
MySQL 5.0.24a
phpMyAdmin-2.9.0.2

A Tip a Day Keeps the Doctor Away!(Keep Updating!!)

2007-10-12T23:06:00.000+08:00

10/12
今天可愛的鐘逸學長認真指導學弟，如何在Fedora/Linux的環境下操作複雜的安裝過程時，發出一問："到底要怎麼樣才可以一直往下點？（註1）"

解答如下：工具列：編輯(E)-->偏好設定→運作方式標籤→總是以瀏覽視窗開啟(圖)
(solved by 帥氣學長Po-Chou)

註1：白話一點的說法就是當我們雙擊一資料夾時，如何在同一視窗開啟，而不是像預設般又再開啟一視窗檢視。
註2：想不到吧！這可是很多人一直以來的疑問呢！雖然它很trivial，但也是個小tip. Enjoy it!!

10/13
如何增加PATH?
(還沒全試出來…)
10/14
Linux底下對網路做了新的設定，就必需重啟網卡。請在命令列下鍵入：
/etc/init.d/network restart
即可
11/3
in vim,using
:make %:r (神奇耶！←鄉巴佬)
就可以用runtime　compiler編譯程式
11/4
用vim coding時，在第一行鍵入gg=G，即可將全部的code自動對齊（indent）
（很愛這個vim tip）

12/20
ssh登入畫面請修改/etc/motd
sshd config在/etc/sshd/sshd_config

Web Technology HW1-using netcat

2007-10-12T22:43:00.000+08:00

Preamble:
netcat for Windows版本一直沒辦法安裝起來，所以大部分的實驗都是用Cygwin這個在Windows模擬Linux的Emulator實作。
基本用法：

nc [-option] host-name -p port-number

好用參數：
-h 幫助訊息 (help)
-i seconds 可以用來設置發送一行標準輸入訊息的間隔，以減少發送速度
-l 監聽模式 (listening some ports),聽說可以用來欺騙別的主機，為一種hacker手法，還沒試出來
-n 直接指定IP位址。預設情況下，netcat會向DNS或NIS server 查詢IP位址對應的主機名稱或網路名稱，然而，在排除網路問題時，我們往往沒有DNS server可用，這時候可用-n選項讓netcat以點式四數格式來表示IP位址，而不進行任何查詢動作。
-o logfile 可以將連接往來傳輸的訊息，並將收到的訊息以16進制的形式記錄到logfile中。其中，每行的第一個字符為<或>，分別表示接收的訊息或發送的訊息。
-s ip-address 鎖定本地網路資源位址
-v 將得到的訊息詳細輸出(-vv會更加詳細)
-u UDP模式(因為研究主題與RTP和UDP相關，故此選項以後應該會常用到)
-------------
以下是我對netcat的man page中較有興趣的參數及用法做的實驗：

實作一：
nc ftp.ncnu.edu.tw 21
530 Please login with USER and PASS.
實作二：
nc http://www.ncnu.edu.tw 80
(一開始一直會time out就結束連線了)
實作三：
用兩台電腦A、B測試，A設為server端，則可用netcat使A的某個port處於監聽狀態：
nc -l -p 2000
(-l -p表示A的port 2000處於監聽狀態，實驗用的port最好不要設在well-known port的區間內)
而電腦B可使用netcat去傳遞資訊：
(這次實驗用的A 主機位於實驗室NAT下的IP Address:10.10.21.97)
nc 10.10.21.97 -p 1000
如此一來，在B鍵入任何字元，都可即時出現在A端。(理論上應該是即時，但是實驗時覺得delay有點嚴重)
此法也可用來在A、B兩端傳遞檔案，只要以root進入B主機，鍵入：

bzip2 -c /dev/sda | netcat 10.10.21.97 2000

(這個實驗我在Debian/Linux下實作的，因為需要一個完整的Linux OS和其root權限)

實作四：

以個人網站http://ms11.voip.edu.tw/~martensite/index.html

為測試網頁。

測試messages:

(1)一開始測netcat ms11.voip.edu.tw/~martensite 80

會得到forward host lookup failed: Unknown host : Connection timed out 的response

(2)netcat ms11.voip.edu.tw 80

get /~martensite/index.html 即可成功，並隨即關掉TCP連線。

(3)接下來我想測試若檢索圖片會有怎樣的效果：

netcat ms11.voip.edu.tw 80

get /~martensite/image/hsiao.JPG

目前http成功的就是這幾個步驟，其它的還待測試，推測應該是指令不熟和對網路架構不熟的緣故。

Epilog:
因為很多功能還沒有真正測試出來，所以還未能感受到所謂網路瑞士刀的功力。但是已可體會它應該是一個很有用的工具，在這次作業繳交後仍會繼續測試，且應用在研究上。
Reference:
Linux.com的介紹文章
http://www.linux.com/articles/114093

某論壇netcat介紹文章
http://bb.stormer.com.tw/viewthread.php?tid=522
傳遞檔案的部分參考：
cyberciti.biz的一篇簡介
http://www.cyberciti.biz/tips/howto-copy-compressed-drive-image-over-network.html
man page of GNU Netcat's

[Weekly Report]2007.10.6-2007.10.12

2007-10-12T16:17:00.001+08:00

1. Reading Tasks:
1-1-1."Carrier Grade Voice over IP," p166-175
1-1-2."Unix Programming Environment," 4.2~4.3
Practice sed and awk using the resource of "Unix Programming" class taught by prof. Klim(張克寧老師).
http://www.csie.ncnu.edu.tw/~klim/
(It is a helpful page for me.)

2. Implementation Tasks:
Besides sed and awk practice, I also study a tutorial about GNU make tool.("The Linux Programming Environment," adopted from Computer Science Department Texas State University)
It is easy enough for me containing lots of step-by step examples to practice. But I have not finished it this week.

本月學習重點：SED & AWK

2007-10-11T21:31:00.001+08:00

練習題：
http://www.csie.ncnu.edu.tw/%7Eklim/unix-intro/exer-2.html
1.寫一個 sed 的 script file, 使以下二行指令的執行效果類似.

$ ps -ef | sed -f your-sed-script
$ ps -ef -o user,pid
解答：
#your-sed-script
s/\(................\).*/\1/
另解：
#(一個字串+一段空白+再一個字串)+一堆字串→\1:
#印出第一個group，即為所求。
#，在column name 為靠左對齊時，格式會有錯誤(e.g:cygwin)
s/\([^ ]* *[^ ]*\).*/\1/

ps.其實用awk就可以用很trivial的解法
ps -ef | awk '{print $1,$2}'
#簡單到不行，但會被人家說殺雞用牛刀。

---
AWK應用(系統管理者愛用的工具？)

1.從/etc/passwd檔案中，用 awk找出pid 不連續的區段。

2.找出沒有密碼的使用者
awk -F:  'NF > 1  && amp;  $1 !~ /^[#+-]/ && $2=="" {print $0}'
3.列出所有帳號
awk -F: '{if ($3>=500) print $1}' /etc/passwd

about嘸蝦米

2007-10-10T18:41:00.000+08:00

使用嘸蝦米也好幾年了，但是還是有字打不出來，要使用 '+某個同音字，這樣很遜，所以在網誌上加個entry記一下常忘的字好了。
慶LYHP(第二碼是Y，不是F，F被L合併了！)
懶LJCB(為什麼我每次最後一碼都拆成T，不懂自己在想什麼，應該是不會寫字…→文盲！XD)
碎待解，目前用 'ZS代過。
齊

----
立志成為快打小蝦！！

[VoIP HW1]92321033

2007-10-08T16:20:00.001+08:00

What is the newest RFC document in
ftp.NCNU.edu.tw RFC 4776
ftp.NCHU.edu.tw RFC 2693
ftp.NCTU.edu.tw RFC (2007/10/08-2007/10/09.ftp of nctu was down)
ftp.IETF.edu.tw RFC 5072(IP Version 6 over PPP)

What is the Internet Draft with largest "draft number you can find?
draft number:48
(draft-ietf-dnsext-mdns-48.txt)

What is the status of the following protocol:
POP3:STANDARD(RFC 1939)
DNS:STANDARD(RFC 1035)
DHCP:DRAFT STANDARD(RFC 2131)

Find an RFC document in each of the following category:
*Obsoleted standard- RFC 1725 Post Office Protocol - Version 3 (Obsoleted by RFC1939, STD0053)
*Poetry- RFC 1121 Act one - the poems
*Experimental- RFC 0096 An Interactive Network Experiment to Study Modes of Access the Network Information Center
*History- RFC 0937 Post Office Protocol: Version 2
*Process documents- RFC 2026 The Internet Standards Process -- Revision 3

第二次修的作業版本：

[VoIP HW1] 97321526

1. What is the newest RFC document in
1.1 ftp.NCNU.edu.tw

5380:
Hierarchical Mobile IPv6 (HMIPv6) Mobility Management

1.2. ftp.NCHU.edu.tw

5242:
A Generalized Unified Character Code: Western European and CJK
Sections.

1.3. ftp.NCTU.edu.tw
??Not found

1.4. ftp.IETF.org

5380:
Hierarchical Mobile IPv6 (HMIPv6) Mobility Management

Note: NCNU server maintains the latest mirror of IETF server.

2. What is the Internet Draft with largest "draft number" you can find?

Ans: 48(draft-ietf-dnsext-mdns-48)
(Use awk utility twice that set different field separators getting the
"draft numbers", sorting draft numbers, and get the largest one.)

3. What is the status (proposed standard, draft standard, standard) of
the following protocol
3.1. POP3: STANDARD

3.2. DNS: STANDARD

3.3 DHCP:PROPOSED STANDARD

4. Find an RFC document in each of the following category:
4.1. Obsoleted standard
0821:Simple Mail Transfer Protocol. J. Postel

4.2. Joke
1882: The 12-Days of Technology Before Christmas ,B. Hancock,
(12/26/1995...why proposed this rfc after X'mas?)

4.3. Poetry
1121 Act one - the poems. J. Postel, L. Kleinrock, V.G. Cerf, B.Boehm

4.4. Experimental
4828 on TCP Friendly Rate Control (TFRC): The Small-Packet (SP) Variant

4.5. History
3245 History and Context of ENUM Operational Decisions

4.6. Process documents
2026 Internet Standards Process

Note:Humorous RFCs(http://tangentsoft.net/rfcs/humorous.html)

[Weekly Report]2007.9.29-2007.10.5

2007-10-07T15:05:00.000+08:00

1. Reading Tasks:
1-1-1."Carrier Grade Voice over IP," p53-72
1-1-2."Unix Programming Environment," 3.5~4.2
sed and awk are still suspended by me,but I study prof.洪朝貴's homepage first to get a glance at them.

2. Implementation Tasks:
Regex practice and other Linux command in the studying books.
---
明顯還在混...

寫報告or論文時注意事項

2007-10-02T17:31:00.000+08:00

一直有個疑問，若reference中引用到網頁上的資訊，該如何將之列在reference中？(格式為何)下面的文章寫得蠻清楚的。
http://apastyle.blogspot.com/2005/10/blog-post_12.html
以後引用網頁資訊時，要記得加類似Retrieve Oct.18,2005這樣的timestamp。

Oct.2