[Firebase] Git for Firebase

FirebaseUI-iOS
FirebaseUI-Android

Database
Auth
Facebook
Google

[Hack] Hack the standard function in library and call the native library function afterwards

http://stackoverflow.com/questions/18827371/hack-the-standard-function-in-library-and-call-the-native-library-function-after

[Technology] Zero-configuration networking

Zero-Configuration Networking WiKi

Zero Configuration official site

Avahi - WiKi

Avahi Configuration

avahi.service

DNS-SD Service Types

Zeroconf vs UPnP

[USB] OHCI/UHCI/EHCI/xHCI

USB 相關的基礎知識

[GRE] IP/GRE/IP and IP/Ethernet/GRE/IP

Two types of GRE tunneling configurations (Small and Large Stones of Programming)

[Netfilter] etables and iptables

ebtables/iptables interaction on a Linux-based bridge

[Memory] Memory leak

Using pmap to monitor memory leak
pmap -d
pmap -x

[Network] MPLS

MPLS 概論
淺談 IP 與 ATM 技術的結合 — MPLS
MPLS
MPLS FAQ FOr Beginners - Cisco System

[Technology] Syslog

Kiwi Syslog Server

[Linux] Linux 6RD

Linux 6RD HOWTO
如何在IPv4與IPv6共存下連線
IPv6 Forum Taiwan
Comcast 6RD - IPv6 Information Center
RFC 5969 - IPv6 6RD
2012 全球 IPv6 高峰會議
中華電信研究所IPv6測試實驗室
IPv6測試
IPv6實用技術手冊

Routers support IPv6
Top 5 IPv6-ready Wireless Routers

[Technology] SVG

SVG Scripting

[Technology] 3G-4G 理論速度

		Downstream	Upstream
3G	WCDMA	384kbps	384kbps	中華電信, 台灣大, 遠傳, 威寶
	CDMA2000	3.1Mbps	1.8Mbps	亞太
3.5G	HSDPA	14.4Mbps	384kbps
3.75G	HSUPA	14.4Mbps	5.76Mbps
----	HSPA+	21.6Mbps	5.76Mbps
3.9G	HSDPA+	42Mbps	5.76Mbps	威寶
4G	LTE	326.4Mbps	86.4Mbps

Understand 4G
WiMax vs LTE

[Network] MAC address

http://packetsdropped.wordpress.com/2011/01/13/mac-address-universally-or-locally-administered-bit-and-individualgroup-bit/
LAA: Locally Administered Address. You can use this for your private network.
UAA: Universally Administered Address.

Individual Address bit: Unicast address
Group Address bit: Multicast/Broadcast address

mac address: xY:xx:xx:xx:xx:xx
Y: 00[L/U][I/G]
[L/U]: 1: UAA, 0: LAA
[I/G]: 1: multicast/broadcast, 0: unicast

OUI: http://standards.ieee.org/develop/regauth/oui/oui.txt

[Linux] DAAP

Something like iTunes.
http://www.omninerd.com/articles/How_to_Build_an_Open_Source_Linux_iTunes_Media_Server_for_Mac_Clients
http://www.go2linux.org/linux/2011/07/share-your-music-library-using-linux-server-daap-and-itunes-1109.html
http://en.wikipedia.org/wiki/Digital_Audio_Access_Protocol
http://www.synology.at/us/products/features/itunes.php
http://seagate.custkb.com/seagate/crm/selfservice/search.jsp?DocId=210999&NewLang=en
http://www.mobile01.com/topicdetail.php?f=300&t=147903
http://krook.net/archives/169
http://www.opendaap.org/

[Protocol] L2TP

L2TP tunnel protocol
http://en.wikipedia.org/wiki/Layer_2_Tunneling_Protocol

MTU tuning for L2TP
http://www.cisco.com/en/US/tech/tk801/tk703/technologies_tech_note09186a0080094c4f.shtml

IP header
http://www.freesoft.org/CIE/Course/Section3/7.htm

TCP header
http://www.freesoft.org/CIE/Course/Section4/8.htm

UDP header
http://www.networksorcery.com/enp/protocol/udp.htm


L2TP header
http://www.networksorcery.com/enp/protocol/l2tp.htm

L2TP images
http://images.yourdictionary.com/l2-tp

MTU/MSS sizes
http://www.cherrot.com/2011/09/pptp-l2tp-over-pppoe-mtu-mru.html

Ethernet MinSize = 512bit = 64 Byte
Ethernet MaxSize = 1518 Byte
so Ethernet IP MTU = 1518 - 18 ( 6 SRCMAC+ 6 DSTMAC+ 2 TYPE+ 4 CRC) = 1500 B
so Ethernet IP TCP MSS = 1500 - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1460 B
so Ethernet IP UDP MTU/MRU = 1500 - 28 ( 20 IP_HEADER + 8 UDP_HEADER ) = 1472 B
so PPPoE MTU/MRU = 1500 - 8 ( 6 PPPoE_SESSION + 2 PPP_HEADER ) = 1492 B
so TCP over PPPoE MSS = 1492 ( PPPoE MTU/MRU ) - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1452
so PPTP MTU/MRU = 1500 - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1444 B
so TCP over PPTP MSS = 1444 ( PPTP MTU/MRU ) - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1404
so L2TP MTU/MRU = 1500 - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1460 B
so TCP over L2TP MSS = 1460 ( L2TP MTU/MRU ) - 40 ( 20 IP_HEADER + 20 TCP_HEADER) = 1420 B
so PPTP over PPPoE MTU/MRU = 1492 ( PPPoE MTU/MRU ) - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1436 B
so PPTP over PPTP MTU/MRU = 1444 ( PPTP MTU/MRU ) - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1388 B
so PPTP over L2TP MTU/MRU = 1460 ( L2TP MTU/MRU ) - 56 ( 20 IP_HEADER + 20 TCP_HEADER + 12 GRE_HEADER + 4 PPP_HEADER ) = 1404 B
so L2TP over PPPoE MTU/MRU = 1492 ( PPPoE MTU/MRU ) - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1452 B
so L2TP over PPTP MTU/MRU = 1444 ( PPTP MTU/MRU ) - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1404 B
so L2TP over L2TP MTU/MRU = 1460 ( L2TP MTU/MRU ) - 40 ( 20 IP_HEADER +8 UDP_HEADER + 8 L2TP_HEADER + 4 PPP_HEADER ) = 1420 B

Adjusting IP MTU, TCP MSS, and PMTUD

http://www.cisco.com/en/US/tech/tk870/tk877/tk880/technologies_tech_note09186a008011a218.shtml

MTU

http://en.wikipedia.org/wiki/Maximum_transmission_unit

MSS

http://www.tcpipguide.com/free/t_TCPMaximumSegmentSizeMSSandRelationshiptoIPDatagra-3.htm

[Cable] DAVIC

http://en.wikipedia.org/wiki/DAVIC

[Cable] HPNA

http://www.eettaiwan.com/ART_8800530047_675327_NT_56476dfb.HTM

Intel WiDi

Intel WiDi: 利用無線技術將 NB 的螢幕投射到顯示的裝置上，如電視、投影機、電腦螢幕等。NB 除了無線連結 WiDi 顯示器，亦可”同時”連線其它的無線網路上網。
要使用 Intel WiDi，需要特定的 Intel WiFi 網卡與 WiDi 裝置。

http://www.iqmore.idv.tw/intel-widi-intel-wireless-display-experience
http://scl13.com/intel-wireless-display-widi/
http://www.techbang.com.tw/posts/6109-asus-u41sv-intel-widi-create-home-video-center-with-wireless

[Android] MIPS on Android - Application

1. Getting Started with Android

2. Android on MIPS Source Code

3. Build MIPS platform
$ export TARGET_PRODUCT=generic
$ export TARGET_ARCH=mips
$ export TARGET_ARCH_VARIANT=mips32-fp
$ source build/envsetup.sh
$ make -j4

[Linux] callback function

Callback function
The program did "call" the function is initiative, but "callback" function is passive. For example, interrupt handler or event handler was called in some specific situations, they were "callback" functions.
The implementation for callback function is typically a function point in C.

The use of function point is like an abstraction layer. Every driver has to implement the same functions, just like r8169.c ethernet driver must implement the functions related to the pci_driver struct needed.


static struct pci_driver rtl8169_pci_driver = {
        .name           = MODULENAME,
        .id_table       = rtl8169_pci_tbl,
        .probe          = rtl8169_init_one,
        .remove         = __devexit_p(rtl8169_remove_one),
#ifdef CONFIG_PM
        .suspend        = rtl8169_suspend,
        .resume         = rtl8169_resume,
        .shutdown       = rtl_shutdown,
#endif
};