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我3，4年前在一块ARM板子上弄通过，由于嵌入式上很多要自己做，redhat上会更简单，也更容易，如果做嵌入式，你应该先在PC上弄通，在移植到目标板上，大致给你说说，希望对你有所帮助 1. 配置kernel使它支持如下PPP选项： PPP(point-to-point) support PPP multilink support(EXPERIMENTAL) PPP support for async serial prots PPP support for sync tty ports PPP Deflate compression PPP BSD-Compress compression 2.编译交叉编译ppp-2.4.1，将./pppd/pppd, ,/chat/chat, ./pppdump/pppdump, ./pppstats/pppstats四个文件拷贝到嵌入式文件系统的/usr/sbin目录下，并将他们的文件属性改为755. 3.在嵌入式文件系统中： a、 建立一个ppp设备: mknod /dev/ppp c 108 0 并改变/etc/ppp文件夹的属性：chmod 600 /etc/ppp. b、 编辑/etc/modules.conf文档，增加一行： options ppp_async flag_time=0 c、 编辑/etc/resolv.conf，加入一行： nameserver 211.136.17.107(注释：这是爱立信的GPRS域名解析服务器DNS地址，当时GPRS没现在普及，为了这个地址狂打了几天电信的技术支持，但很多support好水啊，不懂装懂（借机损一下那些拿高工资又比较水的telecomer,嘿嘿，不要板砖拍我啊，怕怕的，我），最后终于问到一个帅哥，告诉了我这个。) d、 检查/etc/host.conf脚本，确保有order hosts,bind 4.e、 /etc/ppp目录下建立如下文件(这里怎么贴附件？真晕，要我挨个贴啊，辛苦是辛苦了点，好在今天心情好，就一并贴了吧，呵呵。为了好看清楚，每个文件用“#------#”分隔，各个它们都要有可执行权限哦)： #------------------------------------------------# # File: # /etc/ppp/gprs # # Description: # This file holds the serial cable and IrDA pppd options for GPRS phones # Tell the ppp-daemon to accept mangled data receive-all # Give some debug info debug kdebug 7 # Print out all the option values which have been set. dump # Serial device to which terminal is connected; # with serial port (COM1 in Windows) use /dev/ttyS0 # and with IrDA use /dev/ircomm0. #/dev/ircomm0 # IrDA /dev/ttyAM1 # serial cable (NOTE: 这个地方你要改为真正的你用的串口，比如/dev/ttyS0) # Serial port line speed 115200 # Turn off waiting of carrier detect or flow control signal # With IrDA it should be disabled with nocrtscts option. -crtscts # serial cable #nocrtscts # IrDA # Ignore carrier detect signal from the modem local # To keep pppd on the terminal nodetach # Accept the peer's idea of our local IP address ipcp-accept-local # Accept the peer's idea of its (remote) IP address ipcp-accept-remote # IP addresses: # - accept peers idea of our local address and set address peer as 10.0.0.1 # (any address would do, since IPCP gives 0.0.0.0 to it) # - if you use the 10. network at home or something and pppd rejects it, # change the address to something else 0.0.0.0:0.0.0.0 -chap #-pap # pppd must not propose any IP address to the peer! #noipdefault # No ppp compression novj novjccomp papcrypt nodeflate #No ppp magic number nomagic # no asyn cmap asyncmap 0 # Add default route defaultroute # Connect script connect /etc/ppp/gprs-connect-chat # Disconnect script disconnect /etc/ppp/gprs-disconnect-chat #------------------------------------------------# # File: # /etc/ppp/options # receive-all nopcomp noaccomp nomagic debug # Mobile is connected to the first serial port /dev/ttyAM1 (NOTE: 这个地方你要改为真正的你用的串口，比如/dev/ttyS0) 115200 connect '/usr/sbin/chat -e -f /etc/ppp/gprs-connect-chat -v' disconnect '/usr/sbin/chat -e -f /etc/ppp/chat-disconnect -v' modem noauth noccp novj novjccomp defaultroute noipdefault user foo (NOTE：这个很重要，当时搞的我好痛苦，嘿嘿。windows下拨号可以不用用户名，但Linux不行，所以我们骗linux一下，设一个假的好了，另外，还要参见/etc/pap-secrets，呵呵) lock #------------------------------------------------# #!/bin/sh # # File: # /etc/ppp/chat-gprs-connect # # Description: # chat script to open Sonera GPRS service with GPRS phones. If ppp # negotiation stalls, try restarting the phone. To try with other GPRS # operator setting, change the PDP contex setting. The settings work with # all Ericsson models, but Nokia 8310 does not suppor QoS parameters with # AT commands, so just delete those lines and it'll work. # # Set PDP context CID=1, protocol=IP, APN=internet: # AT+CGDCONT=1,"IP","internet","",0,0 # # Set CID=1 QoS requirements from the network, not supported by 8310: # AT+CGQREQ=1,0,0,0,0,0 # # Set CID=1 minimum acceptable QoS parameters, not supported by 8310: # AT+CGQMIN=1,0,0,0,0,0 # # 'Call' CID=1 (activate PDP context one, perform GPRS attach): # ATD*99***1# # # ogin:-BREAK-ogin: / # TIMEOUT 5 / # assword: / # SAY "/nLogged in OK.../n" / # The actual chat script: exec chat / TIMEOUT 5 / ECHO ON / ABORT '/nBUSY/r' / ABORT '/nERROR/r' / ABORT '/nNO ANSWER/r' / ABORT '/nNO CARRIER/r' / ABORT '/nNO DIALTONE/r' / ABORT '/nRINGING/r/n/r/nRINGING/r' / '' AT / TIMEOUT 12 / SAY "Press CTRL-C to close the connection at any stage!" / SAY "/ndefining PDP context.../n" / OK AT+CGATT? / OK AT+CGATT=1 / OK AT+CGATT? / OK 'AT+CGDCONT=1,"IP"' / OK AT+CGQREQ=1,0,0,3,0,0 / OK AT+CGACT=1,1 / OK ATDT*99***1# / TIMEOUT 120 / SAY "/nwaiting up to 2 mintues for connect.../n"/ CONNECT "" / SAY "/nConnected. now logging in.../n" / SAY "/nIf the following ppp negotiations fail,/n" / SAY "try restarting the phone./n" # NOTE: PDP context可能会因你的猫不同而有所区别，查它的手册来写吧 #------------------------------------------------# #!/bin/sh # # File: # /etc/ppp/chat-gprs-disconnect # # send break exec /usr/sbin/chat -V -s -S / ABORT "BUSY" / ABORT "ERROR" / ABORT "NO DIALTONE" / SAY "/nSending break to the modem/n" / "" "/K" / "" "+++ATH" / SAY "/nPDP context detached/n" #------------------------------------------------# # File: # /etc/ppp/chap-secrets # Secrets for authentication using CHAP # client server secret IP addresses ####### redhat-config-network will overwrite this part!!! (begin) ########## ####### redhat-config-network will overwrite this part!!! (end) ############ #------------------------------------------------# # File: #/etc/ppp/pap-secrets # Secrets for authentication using PAP # client server secret IP addresses ####### redhat-config-network will overwrite this part!!! (begin) ########## ####### redhat-config-network will overwrite this part!!! (end) ############ foo * "" * 剩下的文件就是那些关于ip-down，ip-up,ip-down.ipv6to4,ip-up.ipv6to4了，没啥好说的了， 最后只有祝你good luck了 |
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