fedora-pppoe

了解dom fedora pppoe程序

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更新記錄

item	note
20160831	第一版
20160902	新增: pppoe-start 流程圖
	新增: pppoe-connect 流程圖

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目錄

• dom fedora
  • ldvr_pppoe_client
  • pppoe-start script
  • pppoe-connect script
  • pppoe_stop
  • pppoe-status
• process 程序
  • pppoe-connect , pppd, pppoe
• pppoe 相關檔案
  • pppd
  • ppp script
  • 檔案架構

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dom fedora

ldvr_pppoe_client

• 每2分鐘檢查一次
• 若設定值為連線
  • 則確定是否有pppoe介面(即ifconfig | grep ppp0)
  • 若無則重新撥號(即pppoe_stop再pppoe_start)
• pppoe_start: 即system(pppoe-start)
• pppoe_stop: 即system(pppoe-stop)

pppoe-start script

• /var/run/pppoe-adsl.pid(儲存pppoe-connect的pid)
• /var/run/pppoe-adsl.pid.pppd(儲存pppd的pid)
• /var/run/pppoe-adsl.pid.pppoe(儲存pppoe的pid)

• 1.確認/var/run/pppoe-adsl.pid (此為pppoe-connect的pid)
  確認pid是否存在(kill -0 $pid)
  若存在則離開表示，表示正在pppoe-connect

• 2.若無則
  產生/var/run/pppoe-adsl.pid.start (此為pppoe-start的pid)

• 3.開始撥接
  /usr/sbin/pppoe-connect

• 4.若CONNECT_TIMEOUT=0，則離開
  則表示一直執行pppo-connect不會有timeoutn

• 5.等得timeout (CONNECT_TIMEOUT=60)
  每次等6S (CONNECT_POLL=6)，使用pppoe-status來確認是否已連線

• 6.產生timeout
  此時kill pppoe-connect
  清除/var/run/pppoe-adsl.pid.pppd, /var/run/pppoe-adsl.pid.pppoe, /var/run/pppoe-adsl.pid.start
  設定回原本的gateway

pppoe-connect script

• Shell script to connect to an PPPoE provider using PPPoE

  # Usage: pppoe-connect [config_file]
  #        pppoe-connect interface user [config_file]
  # Second form overrides USER and ETH from config file.
  # If config_file is omitted, defaults to /etc/ppp/pppoe.conf

• 開始建立pppoe連線之前，若DEFROUTE != no,,則會先移除目前的gateway

  if [ "${DEFROUTE}" != "no" ] ; then
      DEFRT=$(ip route list match 0/0)
      [ -n "${DEFRT}" ] && echo "$DEFRT" > /etc/default-routes
      echo "$DEFRT" | while read spec; do
          $IP route del $spec;
      done
  fi

• 移除之後狀態如下

  [root@localhost tt]# route -n
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  192.168.22.0    0.0.0.0         255.255.255.0   U     100    0        0 enp1s0
  [root@localhost tt]# cat /etc/default-routes 
  default via 192.168.22.1 dev enp1s0  proto static  metric 100

• pppd call

  /usr/sbin/pppd pty /usr/sbin/pppoe -p /var/run/pppoe-adsl.pid.pppoe -I enp1s0 -T 80 -U  -m 1412    ipparam ppp0 linkname ppp0 noipdefault noauth default-asyncmap defaultroute hide-password nodetach usepeerdns mtu 1492 mru 1492 noaccomp nodeflate nopcomp novj novjccomp user sz3lmc48@163.gd lcp-echo-interval 20 lcp-echo-failure 3

• pppd_cmd

  PPPOE_CMD:/usr/sbin/pppoe -p /var/run/pppoe-adsl.pid.pppoe -I enp1s0 -T 80 -U  -m 1412

pppoe_stop

1-確認/var/run/pppoe-adsl.pid.pppd是否存在
2-若有則kill pppoe pid

CONFIG:/etc/sysconfig/network-scripts/ifcfg-ppp0
PPPOE_PIDFILE:/var/run/pppoe-adsl.pid.pppoe
PPPD_PIDFILE:/var/run/pppoe-adsl.pid.pppd
STARTPID:/var/run/pppoe-adsl.pid.start
DEMAND:no

• [root@localhost tt]# cat /etc/sysconfig/network-scripts/ifcfg-ppp0
  PIDFILE=/var/run/pppoe-adsl.pid

  USERCTL=yes
  BOOTPROTO=dialup
  NAME=DSLppp0
  DEVICE=ppp0
  TYPE=xDSL
  ONBOOT=no
  PIDFILE=/var/run/pppoe-adsl.pid
  FIREWALL=NONE
  PING=.
  PPPOE_TIMEOUT=80
  LCP_FAILURE=3
  LCP_INTERVAL=20
  CLAMPMSS=1412
  CONNECT_POLL=6
  CONNECT_TIMEOUT=60
  DEFROUTE=yes
  SYNCHRONOUS=no
  ETH=enp1s0
  PROVIDER=DSLppp0
  USER=sz3lmc48@163.gd
  PEERDNS=yes
  DEMAND=no

• CONNECT_POLL=6
  設定pppoe-start時, 每6秒做一次pppoe-status，確認是否撥接成功(即interfac came up)

• CONNECT_TIMEOUT=60
  設定pppoe-start時，預計連線判斷時間(即等待60S，來確認連線建立程序)

• 若pppoe-start失敗

  • kill $CONNECT_PID
  • clean up PIDFILE
    /var/run/pppoe-adsl.pid
    /var/run/pppoe-adsl.pid.pppd
    /var/run/pppoe-adsl.pid.pppoe
    /var/run/pppoe-adsl.pid.start

pppoe-status

• Shell script to report on status of PPPoE connection

  # Usage: pppoe-status [config_file]
  # If config_file is omitted, defaults to /etc/ppp/pppoe.conf

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process 程序

pppoe-connect , pppd, pppoe

• pppoe-connect先執行
  再執行 pppd pty pppoe -p xx xx
  由pppd去帶起pppoe

  root     25411 16537  0 15:25 pts/1    00:00:00 /bin/bash ./pppoe-connect
  root     25435     2  0 15:25 ?        00:00:00 [kworker/u8:0]
  root     25546 25411  0 15:25 ?        00:00:00 /usr/sbin/pppd pty /usr/sbin/pppoe -p /var/run/pppoe-adsl.pid.pppoe -I enp1s0 -T 80 -U  -m 1412    ipparam p
  root     25547 25546  0 15:25 ?        00:00:00 /usr/sbin/pppoe -p /var/run/pppoe-adsl.pid.pppoe -I enp1s0 -T 80 -U -m 1412
  root     25554 18056  0 15:25 pts/2    00:00:00 ps -ef
  [root@localhost tt]# cat /var/run/pppoe-adsl.pid.pppoe 
  25547
  [root@localhost tt]# cat /var/run/pppoe-adsl.pid
  25411
  [root@localhost tt]# cat /var/run/pppoe-adsl.pid.ppp
  pppoe-adsl.pid.pppd   pppoe-adsl.pid.pppoe  
  [root@localhost tt]# cat /var/run/pppoe-adsl.pid.pppd
  25546

• /var/run/pppoe-adsl.pid
  為pppoe-connect的pid

• /var/run/pppoe-adsl.pid.pppd
  為pppd的pid

• /var/run/pppoe-adsl.pid.pppoe
  為pppoe的pid

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pppoe 相關檔案

pppd

• pppd

  [root@localhost tt]# pppd -v
  pppd: unrecognized option '-v'
  pppd version 2.4.7
  Usage: pppd [ options ], where options are:
  	<device>	Communicate over the named device
  	<speed>		Set the baud rate to <speed>
  	<loc>:<rem>	Set the local and/or remote interface IP
  			addresses.  Either one may be omitted.
  	asyncmap <n>	Set the desired async map to hex <n>
  	auth		Require authentication from peer
          connect <p>     Invoke shell command <p> to set up the serial line
  	crtscts		Use hardware RTS/CTS flow control
  	defaultroute	Add default route through interface
  	file <f>	Take options from file <f>
  	modem		Use modem control lines
  	mru <n>		Set MRU value to <n> for negotiation
  See pppd(8) for more options.
  [root@localhost tt]#

ppp script

• ppp-script

  [root@localhost tt]# ls -l /usr/sbin/ppp*
  -rwxr-xr-x 1 root root 394464 Feb  5  2016 /usr/sbin/pppd
  -rwxr-xr-x 1 root root  54376 Feb  5  2016 /usr/sbin/pppdump
  -rwxr-xr-x 1 root root  40456 Feb  5  2016 /usr/sbin/pppoe
  -rwxr-xr-x 1 root root  11053 Feb  5  2016 /usr/sbin/pppoe-connect
  -rwxr-xr-x 1 root root  24336 Feb  5  2016 /usr/sbin/pppoe-discovery
  -rwxr-xr-x 1 root root  36424 Feb  5  2016 /usr/sbin/pppoe-relay
  -rwxr-xr-x 1 root root  57440 Feb  5  2016 /usr/sbin/pppoe-server
  -rwxr-xr-x 1 root root  12867 Feb  5  2016 /usr/sbin/pppoe-setup
  -rwxr-xr-x 1 root root  23880 Feb  5  2016 /usr/sbin/pppoe-sniff
  -rwxr-xr-x 1 root root   6456 Feb  5  2016 /usr/sbin/pppoe-start
  -rwxr-xr-x 1 root root   2680 Feb  5  2016 /usr/sbin/pppoe-status
  -rwxr-xr-x 1 root root   3601 Feb  5  2016 /usr/sbin/pppoe-stop
  -rwxr-xr-x 1 root root  15696 Feb  5  2016 /usr/sbin/pppstats
  -rwxr-xr-x 1 root root  23776 Feb  5  2016 /usr/sbin/ppp-watch

檔案架構

• /etc/ppp

  [root@localhost tt]# cd /etc/ppp
  [root@localhost ppp]# tree
  .
  ├── chap-secrets
  ├── eaptls-client
  ├── eaptls-server
  ├── firewall-masq
  ├── firewall-standalone
  ├── ip-down
  ├── ip-down.ipv6to4
  ├── ip-up
  ├── ip-up.ipv6to4
  ├── ipv6-down
  ├── ipv6-up
  ├── options
  ├── options.pptp
  ├── pap-secrets
  ├── peers
  │   └── wvdial
  └── pppoe-server-options

• /etc/sysconfig/network-scripts/

  [root@localhost network-scripts]# tree
  ├── ifcfg-enp4s0
  ├── ifcfg-enp7s2
  ├── ifcfg-lo
  ├── ifcfg-ppp0
  ├── ifcfg-Wired_connection_1
  ├── ifdown -> ../../../usr/sbin/ifdown
  ├── ifdown-bnep
  ├── ifdown-eth
  ├── ifdown-ippp
  ├── ifdown-ipv6
  ├── ifdown-isdn -> ifdown-ippp
  ├── ifdown-post
  ├── ifdown-ppp
  ├── ifdown-routes
  ├── ifdown-sit
  ├── ifdown-Team
  ├── ifdown-TeamPort
  ├── ifdown-tunnel
  ├── ifup -> ../../../usr/sbin/ifup
  ├── ifup-aliases
  ├── ifup-bnep
  ├── ifup-eth
  ├── ifup-ippp
  ├── ifup-ipv6
  ├── ifup-isdn -> ifup-ippp
  ├── ifup-plip
  ├── ifup-plusb
  ├── ifup-post
  ├── ifup-ppp
  ├── ifup-routes
  ├── ifup-sit
  ├── ifup-Team
  ├── ifup-TeamPort
  ├── ifup-tunnel
  ├── ifup-wireless
  ├── init.ipv6-global
  ├── network-functions
  └── network-functions-ipv6