pppoe 流程解读
DISCOVERY
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发送PADI
Sent packet: Ether addr: ff:ff:ff:ff:ff:ff
PPPoE hdr: ver=0x1 type=0x1 code=0x09 sid=0x0000 length=0x000c (PADI)
PPPoE tag: type=0103 length=0004 (Host Uniq) data (bin): 08 c0 47 00 PPPoE tag: type=0101 length=0000 (Service name)
Recv'd packet: Ether addr: bc:30:5b:e8:ab:35
对方响应 PADO
Recv'd packet: Ether addr: bc:30:5b:e8:ab:35
PPPoE hdr: ver=0x1 type=0x1 code=0x07 sid=0x0000 length=0x002d (PADO)
PPPoE tag: type=0102 length=0005 (AC Name) data (UTF-8): linux PPPoE tag: type=0101 length=0000 (Service name) PPPoE ta
HOST_UNIQ successful match
发送 PADR
Sent packet: Ether addr: bc:30:5b:e8:ab:35
PPPoE hdr: ver=0x1 type=0x1 code=0x19 sid=0x0000 length=0x0024 (PADR)
PPPoE tag: type=0101 length=0000 (Service name) PPPoE tag: type=0103 length=0004 (Host Uniq) data (bin): 08 c0 47 00 PPP
对方响应 PADS
Recv'd packet: Ether addr: bc:30:5b:e8:ab:35
(PPPOE Discovery)
PPPoE hdr: ver=0x1 type=0x1 code=0x65 sid=0x0200 length=0x000c (PADS)
PPPoE tag: type=0101 length=0000 (Service name) PPPoE tag: type=0103 length=0004 (Host Uniq) data (bin): 08 c0 47 00
HOST_UNIQ successful match
SESSION
=====================================================================
客户端与服务器端进行ppp的LCP协商，建立链路层通信
LCP协议报文
configure-request
configure-ack
sent [LCP ConfReq id=0x1
rcvd [LCP ConfReq id=0x1
sent [LCP ConfAck id=0x1
rcvd [LCP ConfReq id=0x1
sent [LCP ConfAck id=0x1
sent [LCP ConfReq id=0x1
rcvd [LCP ConfAck id=0x1
CHAP + MD5
CHAP 认证三次握手
C<--S 客户端接受挑战字
sent [LCP EchoRep id=0x0 magic=0x9d768ef4]
rcvd [CHAP Challenge id=0x5c
<536bbdbeb2101f5a0762643d6cf4f2a7b9a9877e5eb5>, name = "linux"]
C-->S 客户端将挑战字+passwd进行MD5摘要，MD5（chanllenge+passwd）发送给服务器端
sent [CHAP Response id=0x5c
rcvd [LCP EchoRep id=0x0 magic=0x572cee2d]
C<--S 服务器端验证完毕后，往客户端发送success或者fail信息
rcvd [CHAP Success id=0x5c "Access granted"]
认证结束，暂且到这里先
IPCP动态地址协商
============================================================
客户端发送 0.0.0.0地址
sent [IPCP ConfReq id=0x1
rcvd [IPCP ConfReq id=0x1
客户端发送
sent [IPCP ConfAck id=0x1
//服务器应答分配ip ，gateway，DNS
rcvd [IPCP ConfNak id=0x1
客户端发送
sent [IPCP ConfReq id=0x2
ipcp.c,ipcp_printpkt,2045
rcvd [IPCP ConfAck id=0x2
地址拿到了上网去吧！！！！！