1. 實驗二 Linux 下網路驅動程式追蹤 教師： 助教： 1998/10/19 High Speed Network Lab. Department of Computer Information Science, NCTU

2. Outline Why Linux ? Linux 核心的內部 Linux 開機始末 實驗步驟

3. Why Linux ? Free !! Compatible with System V & BSD UNIX Compliant to POSIX 1.0 Fast update !! Internet Powerful !! Pure 32-bit OS Candidate OS for embedded system Source code open !! Suitable for academic use

4. Linux 核心內部

5. Linux 開機始末 Load the kernel Probe & setup the hardware Create system process System initialization getty login process

6. 實驗步驟 安裝 Linux 追蹤開機始末 編譯核心 設定 Linux 網路組態 在 kernel 中追蹤 network driver

7. 安裝 Linux Where should I install it from ? Which distribution should I choose from ? Which version should I take ? How do I install it ? Does there exist any document ? –/usr/doc

8. 追蹤 Linux 開機始末 Capture bootup sequence –dmesg –Shift + [PgUp | PgDw] –syslogd Traverse /etc/initab /etc/rc.d/ Tools grep Microsoft Visio Studio - Edit - Find in files

9. 編譯核心 FTP, tar make [config | menuconfig | xconfig] –Modules support –Choose your adapter driver –Choose TCP/IP protocol stack make dep, make clean, make zImage make modules, make modules_install move to /boot re-write boot sector (lilo -v -v -v)

10. 設定網路組態 Internet 參數 –Network Interface Configuration ifconfig eth0 x.x.x.x netmask y.y.y.y broadcast z.z.z.z –Routing table Configuration route add -net default gw 140.113.88.254 dev eth0 route add -net 140.113.23.0 dev eth0

11. 追蹤 kernel 中的 network driver Trace by debugger Trace by printing, record by logging –klogd vs. syslogd Trigger network modules by “ping”

12. 決定待測機器 Host IP= H, Netmask=M, Router=R far active host (IP address=F) near active host (IP address=N1) near inactive host (IP address=N2) （ H and M ）＝（ R and M ）＝（ R and N1 ）＝（ R and N2 ） ≠ （ R and F ）