我使用rtt系统+lwip+ppp组件进行gprs模块的ppp拨号，gprs模块使用的是sim900a，使用联通的手机卡。现在已经可以拨号出去并且从系统打印的log来看联通的服务器已经给我分配了ip及dns地址了，但是再进一步协商处理时，最终连接过程还是被Terminate掉了。现在不太明白中间的问题出来哪里。下面附上我在控制台打印出来的系统log方便大家帮忙查看和方腊问题！
lcp_init: xmit_accm=0 0 0 0upap_init: 0pppOverSerialOpen: unit 0: ConnectingpppStart: unit 0ppp_set_xaccm[0]: outACCM=0 0 0 0ppp_send_config[0]: outACCM=FF FF FF FFppp_recv_config[0]: inACCM=0 0 0 0lcp_lowerup: asyncmap=0 0 0 0LCP: lowerup state 0 (LS_INITIAL) -> 2 (LS_CLOSED)auth_reset: 0lcp_addci: L opt=2 0lcp_addci: L opt=5 52181044lcp_addci: opt=7lcp_addci: opt=8pppWrite[0]: len=47fsm_sdata(LCP): Sent code 1,1,20.LCP: sending Configure-Request, id 1LCP: open state 2 (LS_CLOSED) -> 6 (LS_REQSENT)pppStart: finishedppp connecting...SDCard File System initialized!pppInProc[0]: got 63 bytespppInput[0]: LCP len=14fsm_input(LCP):4,1,14fsm_rconfnakrej(LCP): Rcvd id 1 state=6 (LS_REQSENT)lcp_rejci: long opt 5 rejectedlcp_rejci: void opt 7 rejectedlcp_rejci: void opt 8 rejectedlcp_addci: L opt=2 0pppWrite[0]: len=28fsm_sdata(LCP): Sent code 1,2,10.LCP: sending Configure-Request, id 2pppInput[0]: packet processedpppInProc[0]: got 4 bytespppInProc[0]: got 25 bytespppInput[0]: LCP len=10fsm_input(LCP):2,2,10fsm_rconfack(LCP): Rcvd id 2 state=6 (LS_REQSENT)lcp_acki: AckpppInput[0]: packet processedpppInProc[0]: got 1 bytespppInProc[0]: got 26 bytespppInProc[0]: got 8 bytespppInput[0]: LCP len=14fsm_input(LCP):1,1,14fsm_rconfreq(LCP): Rcvd id 1 state=7 (LS_ACKRCVD)lcp_reqci: ASYNCMAP=A0000 PAP (C023)lcp_reqci: returning CONFACK.pppWrite[0]: len=35fsm_sdata(LCP): Sent code 2,1,14.ppp_send_config[0]: outACCM=0 0 A 0ppp_recv_config[0]: inACCM=0 0 0 0link_established: unit 0; Lowering up all protocols...upap_lowerup: init 0 clientstate s=0IPCP: lowerup state 0 (LS_INITIAL) -> 2 (LS_CLOSED)upap_authwithpeer: 0 user=none password=none s=1pppWrite[0]: len=21pap_sauth: Sent id 1pppInput[0]: packet processedpppInProc[0]: got 2 bytespppInProc[0]: got 19 bytespppInput[0]: PAP len=13pap_rauthack: Rcvd id 1 s=3Remote message: Login OK
这里已经登录成功
auth_withpeer_success: 0 proto=C023pppWrite[0]: len=36fsm_sdata(IPCP): Sent code 1,1,28.IPCP: sending Configure-Request, id 1IPCP: open state 2 (LS_CLOSED) -> 6 (LS_REQSENT)pppInput[0]: packet processedIPCP: timeout resending Config-Request state=6 (LS_REQSENT)pppWrite[0]: len=37fsm_sdata(IPCP): Sent code 1,1,28.IPCP: sending Configure-Request, id 1pppInProc[0]: got 3 bytespppInProc[0]: got 26 bytespppInput[0]: IPCP len=10fsm_input(IPCP):1,1,10fsm_rconfreq(IPCP): Rcvd id 1 state=6 (LS_REQSENT)ipcp_reqci: ADDR 192.200.1.21ipcp_reqci: returning Configure-ACKpppWrite[0]: len=17fsm_sdata(IPCP): Sent code 2,1,10.pppInput[0]: packet processedpppInProc[0]: got 7 bytespppInput[0]: IPCP len=10fsm_input(IPCP):4,1,10fsm_rconfnakrej(IPCP): Rcvd id 1 state=8 (LS_ACKSENT)pppWrite[0]: len=29fsm_sdata(IPCP): Sent code 1,2,22.IPCP: sending Configure-Request, id 2pppInput[0]: packet processedpppInProc[0]: got 5 bytespppInProc[0]: got 25 bytespppInput[0]: IPCP len=22fsm_input(IPCP):3,2,22fsm_rconfnakrej(IPCP): Rcvd id 2 state=8 (LS_ACKSENT)local IP address 10.194.146.217primary DNS address 210.21.196.6secondary DNS address 221.5.88.88
模块已经分配到了ip
pppWrite[0]: len=29fsm_sdata(IPCP): Sent code 1,3,22.IPCP: sending Configure-Request, id 3pppInput[0]: packet processedpppInProc[0]: got 12 bytespppInProc[0]: got 6 bytespppInput[0]: IPCP len=10fsm_input(IPCP):1,1,10fsm_rconfreq(IPCP): Rcvd id 1 state=8 (LS_ACKSENT)ipcp_reqci: ADDR 192.200.1.21ipcp_reqci: returning Configure-ACK
本来上面已经分配得到了ip了，我以为这算是拨号成功得了，但是这里为什么持续重复出现了几个这样的过程，192.200.1.21 应该是联通服务器的ip地址？
pppWrite[0]: len=18fsm_sdata(IPCP): Sent code 2,1,10.pppInput[0]: packet processedpppInProc[0]: got 6 bytespppInProc[0]: got 12 bytespppInput[0]: IPCP len=10fsm_input(IPCP):1,1,10fsm_rconfreq(IPCP): Rcvd id 1 state=8 (LS_ACKSENT)ipcp_reqci: ADDR 192.200.1.21ipcp_reqci: returning Configure-ACKpppWrite[0]: len=18fsm_sdata(IPCP): Sent code 2,1,10.pppInput[0]: packet processedIPCP: timeout resending Config-Request state=8 (LS_ACKSENT)pppWrite[0]: len=29fsm_sdata(IPCP): Sent code 1,3,22.IPCP: sending Configure-Request, id 3pppInProc[0]: got 12 bytespppInProc[0]: got 6 bytespppInput[0]: IPCP len=10fsm_input(IPCP):1,1,10fsm_rconfreq(IPCP): Rcvd id 1 state=8 (LS_ACKSENT)ipcp_reqci: ADDR 192.200.1.21ipcp_reqci: returning Configure-ACKpppWrite[0]: len=18fsm_sdata(IPCP): Sent code 2,1,10.pppInput[0]: packet processedpppInProc[0]: got 6 bytespppInProc[0]: got 12 bytespppInput[0]: IPCP len=10fsm_input(IPCP):1,1,10fsm_rconfreq(IPCP): Rcvd id 1 state=8 (LS_ACKSENT)ipcp_reqci: ADDR 192.200.1.21ipcp_reqci: returning Configure-ACKpppWrite[0]: len=18fsm_sdata(IPCP): Sent code 2,1,10.pppInput[0]: packet processedIPCP: timeout resending Config-Request state=8 (LS_ACKSENT)pppWrite[0]: len=30fsm_sdata(IPCP): Sent code 1,3,22.IPCP: sending Configure-Request, id 3pppInProc[0]: got 10 bytespppInProc[0]: got 8 bytespppInput[0]: IPCP len=10fsm_input(IPCP):1,1,10fsm_rconfreq(IPCP): Rcvd id 1 state=8 (LS_ACKSENT)ipcp_reqci: ADDR 192.200.1.21ipcp_reqci: returning Configure-ACKpppWrite[0]: len=18fsm_sdata(IPCP): Sent code 2,1,10.pppInput[0]: packet processedpppInProc[0]: got 5 bytespppInProc[0]: got 26 bytespppInProc[0]: got 28 bytespppInput[0]: LCP len=32fsm_input(LCP):5,2,32fsm_rtermreq(LCP): Rcvd id 2 state=9 (LS_OPENED)
这里我感觉是被联通发过来的指令给中断了连接了。
LCP terminated by peer (20007654) link_down: 0upap_lowerdown: 0 s=4IPCP: lowerdown state 8 (LS_ACKSENT) -> 1 (LS_STARTING)IPCP: close reason=LCP down state 1 (LS_STARTING) -> 0 (LS_INITIAL)pppLinkDown: unit 0pppRecvWakeup: unit 0read_abortppp_send_config[0]: outACCM=FF FF FF FFppp_recv_config[0]: inACCM=0 0 0 0pppWrite[0]: len=18fsm_sdata(LCP): Sent code 6,2,4.pppInput[0]: packet processedpppInProc[0]: got 1 bytesLCP: timeout sending Terminate-Request state=5 (LS_STOPPING)link_terminated: 0Connection terminated.pppLinkTerminated: unit 0pppRecvWakeup: unit 0read_abortpppLinkTerminated: unit 0: linkStatusCB=08000d99 errCode=0We have lost connection pppLinkTerminated: finished.
连接已经失败
恳请懂的童鞋大侠解答啊！
2013-06-06
补充说明：硬件平台使用stm32f407.代码是直接使用art上的工程，
由于art的工程里面没有ppp的源码，我是从realtouch的工程里面
把ppp的源码拉过来的。
2013-06-07
结贴，发现是我串口先太长误码率太高原因产生。把串口线弄短，
现在已经拨号成功啦！可以ping通外网了，感谢群里及论坛的热血帮助！
