linuxethgprs

㈠ linux有gprs也有线怎么选择

默
认情况在/etc/ppp/目录下建立文件gprs-connect-chat，内容如下（每个参数解释在ppp-howto中有详细解释。它是在ppp
底层会话的时候给chat进程的参数每行是一个“期望/发送”的组合序列。当出现一些经典的错误如： "LCP: timeout sending
Config-Requests" ，"serial line is not 8 bit clean...",“serial line is
looped
back”等，去参看方式2提到的两个文档，或者google。注意，为什么不能确切地给出解决的方式，原因是打印出来的同一个错误信息，我称之为现象，
同一现象可能是由很多种原因造成的，需要自己实地排查。）
#/etc/ppp/gprs-connect-chat
TIMEOUT 15
ABORT '\nBUSY\r'
ABORT '\nNO ANSWER\r'
ABORT '\nRINGING\r\n\r\nRINGING\r'
#'' AT
#'OK-+++\c-OK' ATH0
TIMEOUT 40
'' \rAT
OK ATS0=0 #这些都是标准的at命令，建议查看随模块的at命令手册
OK ATE0V1
OK AT+CGDCONT=1,"IP","CMNET" #设置isp接入网关为中国移动的cmnet，如果你想 获得更多访问资源的话
OK ATDT*99***1# #中国移动gprs的接入号吗
CONNECT ''
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
建立文件/etc/ppp/peers/gprs，它的作用是给pppd进程提供配置参数（详见man 8 pppd的输出内容，如果出现问题这个将是非常重要的参考页），内容如下：
#/etc/ppp/peers/gprs
# Usage: root>pppd call gprs
/dev/s3c2410_serial1 #改成自己的端口名
115200 #改成自己串口波特率
nocrtscts
#可能你的串口是需要crtscts，硬件流控的，这是由你的串口决定的，一般嵌入式系统的串口没有带硬件流控，也不需要就加nocrtscts
modem #这个参数使得pppd进程将等待模块发回的CD (Carrier Detect)信号，与local真好相反
#noauth
debug #把调试信息输出到/var/log/messages，在调试成功后去掉它，以减少垃圾的产生。
nodetach
#hide-password
usepeerdns #以下的3个参数一般不可少
noipdefault
defaultroute
user smsong #设置接入的用户名，在chap-secrets或者pap-secets中使用
0.0.0.0:0.0.0.0 #本地和远端的ip都设为0使得接入的isp分配本地的ip地址
ipcp-accept-local #要求peer也就是isp给自己非配动态的IP地址
#ipcp-accept-remote
#lcp-echo-failure 12
#lcp-echo-interval 3
noccp #不需要压缩控制协议，有可能对端不需要，根据自己的isp的情况
#novj
#novjccomp
persist #保证在连接断开的情况下不退出，并尝试重新打开连接
connect '/usr/sbin/chat -s -v -f /etc/ppp/gprs-connect-chat'
#pppd调用chat会话进程接入对端isp，启动对端的pppd，然后本地pppd与对端的pppd一起进行协
#商网络参数和chap/pap认证，成功后，再进行ncp层的ip的分配。
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#/etc/ppp/chap-secets
# 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) ############
smsong * 123456 *
有点地区的GPRS可能使用pap方式认证接入用户，所以在同一级目录下，创建pap-secets文件，内容与chap-secets类似有4项的内容第2和第4项一般不限制就用*（星号）代表。反正要你在/etc/ppp/下放着这两个文件就好。
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
在建立了ppp0连接以后可以使用ctrl+c或者下面的脚本程序ppp-off断开ppp连接
#/etc/ppp/ppp-off
#!/bin/sh
######################################################################
#
# Determine the device to be terminated.
#
if [ "$1" = "" ]; then
DEVICE=ppp0
else
DEVICE=$1
fi
######################################################################
#
# If the ppp0 pid file is present then the program is running. Stop it.
if [ -r /var/run/$DEVICE.pid ]; then
kill -INT `cat /var/run/$DEVICE.pid`
#
# If the kill did not work then there is no process running for this
# pid. It may also mean that the lock file will be left. You may wish
# to delete the lock file at the same time.
if [ ! "$?" = "0" ]; then
rm -f /var/run/$DEVICE.pid
echo "ERROR: Removed stale pid file"
exit 1
fi
#
# Success. Let pppd clean up its own junk.
echo "PPP link to $DEVICE terminated."
exit 0
fi
#
# The ppp process is not running for ppp0
echo "ERROR: PPP link is not active on $DEVICE"
exit 1
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
做好上面的配置以后，输入pppd call gprs命令，注意如果你的gprs这个文件不在/etc/ppp/peers/目录下，在给出标注路径给pppd
[root@localhost ppp_scripts]# pppd call gprs
timeout set to 15 seconds
abort on (\nBUSY\r)
abort on (\nNO ANSWER\r)
abort on (\nRINGING\r\n\r\nRINGING\r)
timeout set to 40 seconds
send (^MAT^M^M)
expect (OK)
^M^M
OK
-- got it
send (ATS0=0^M^M)
expect (OK)
^M
AT^M
OK
-- got it
send (ATE0V1^M^M)
expect (OK)
^M
^M^M
OK
-- got it
send (AT+CGDCONT=1,"IP","CMNET"^M^M)
expect (OK)
^M
ATS0=0^M^M
OK
-- got it
send (ATDT*99***1#^M^M)
expect (CONNECT)
^M
^M^M
OK^M
ATE0V1^M^M
OK^M
^M
OK^M
^M
OK^M
^M
OK^M
^M
CONNECT
-- got it
send (^M)
Serial connection established.
using channel 20
Using interface ppp0
Connect: ppp0 /dev/ttyS0
Warning - secret file /etc/ppp/pap-secrets has world and/or group access
sent [LCP ConfReq id=0x1 ]
rcvd [LCP ConfRej id=0x1 ]
sent [LCP ConfReq id=0x2 ]
rcvd [LCP ConfAck id=0x2 ]
rcvd [LCP ConfReq id=0x1 ]
sent [LCP ConfAck id=0x1 ]
rcvd [CHAP Challenge id=0x1 , name = ""]
Warning - secret file /etc/ppp/chap-secrets has world and/or group access
sent [CHAP Response id=0x1 , name = "smsong"]
rcvd [CHAP Success id=0x1 ""]
CHAP authentication succeeded
CHAP authentication succeeded
sent [CCP ConfReq id=0x1 ]
sent [IPCP ConfReq id=0x1 ]
rcvd [LCP ProtRej id=0x1 80 fd 01 01 00 0c 1a 04 78 00 18 04 78 00]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
rcvd [IPCP ConfReq id=0x1]
sent [IPCP ConfNak id=0x1 ]
rcvd [IPCP ConfRej id=0x1 ]
sent [IPCP ConfReq id=0x2 ]
rcvd [IPCP ConfReq id=0x2]
sent [IPCP ConfAck id=0x2]
rcvd [IPCP ConfNak id=0x2 ]
sent [IPCP ConfReq id=0x3 ]
rcvd [IPCP ConfAck id=0x3 ]
Could not determine remote IP address: defaulting to 10.64.64.64
local IP address 10.144.202.159
remote IP address 10.64.64.64
primary DNS address 211.138.200.69
secondary DNS address 211.103.13.101
Script /etc/ppp/ip-up started (pid 4578)
Script /etc/ppp/ip-up finished (pid 4578), status = 0x0
使用ctrl+c可以断开连接，这样一般不太好测试是不是连接上了（遇有开发不上的控制台只有一个的原因），可以去掉/etc/ppp
/peers/gprs文件中的nodetach参数，要用ping，你需要将eth0即网口给禁用掉，这样ping才会通过ppp0端口寻找路由连接外
网。
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
可以用命令tail -f /var/log/messages看到日志：
Mar 20 20:55:55 localhost pppd[4557]: pppd 2.4.4 started by root, uid 0
Mar 20 20:55:56 localhost chat[4558]: timeout set to 15 seconds
Mar 20 20:55:56 localhost chat[4558]: abort on (\nBUSY\r)
Mar 20 20:55:56 localhost chat[4558]: abort on (\nNO ANSWER\r)
Mar 20 20:55:56 localhost chat[4558]: abort on (\nRINGING\r\n\r\nRINGING\r)
Mar 20 20:55:56 localhost chat[4558]: timeout set to 40 seconds
Mar 20 20:55:56 localhost chat[4558]: send (^MAT^M^M)
Mar 20 20:55:56 localhost chat[4558]: expect (OK)
Mar 20 20:55:56 localhost chat[4558]: ^M^M
Mar 20 20:55:56 localhost chat[4558]: OK
Mar 20 20:55:56 localhost chat[4558]: -- got it
Mar 20 20:55:56 localhost chat[4558]: send (ATS0=0^M^M)
Mar 20 20:55:56 localhost chat[4558]: expect (OK)
Mar 20 20:55:56 localhost chat[4558]: ^M
Mar 20 20:55:56 localhost chat[4558]: AT^M
Mar 20 20:55:56 localhost chat[4558]: OK
Mar 20 20:55:56 localhost chat[4558]: -- got it
Mar 20 20:55:56 localhost chat[4558]: send (ATE0V1^M^M)
Mar 20 20:55:56 localhost chat[4558]: expect (OK)
Mar 20 20:55:56 localhost chat[4558]: ^M
Mar 20 20:55:56 localhost chat[4558]: ^M^M
Mar 20 20:55:56 localhost chat[4558]: OK
Mar 20 20:55:56 localhost chat[4558]: -- got it
Mar 20 20:55:56 localhost chat[4558]: send (AT+CGDCONT=1,"IP","CMNET"^M^M)
Mar 20 20:55:57 localhost chat[4558]: expect (OK)
Mar 20 20:55:57 localhost chat[4558]: ^M
Mar 20 20:55:57 localhost chat[4558]: ATS0=0^M^M
Mar 20 20:55:57 localhost chat[4558]: OK
Mar 20 20:55:57 localhost chat[4558]: -- got it
Mar 20 20:55:57 localhost chat[4558]: send (ATDT*99***1#^M^M)
Mar 20 20:55:57 localhost chat[4558]: expect (CONNECT)
Mar 20 20:55:57 localhost chat[4558]: ^M
Mar 20 20:55:57 localhost chat[4558]: ^M^M
Mar 20 20:55:57 localhost chat[4558]: OK^M
Mar 20 20:55:57 localhost chat[4558]: ATE0V1^M^M
Mar 20 20:55:57 localhost chat[4558]: OK^M
Mar 20 20:55:57 localhost chat[4558]: ^M
Mar 20 20:55:57 localhost chat[4558]: OK^M
Mar 20 20:55:57 localhost chat[4558]: ^M
Mar 20 20:55:57 localhost chat[4558]: OK^M
Mar 20 20:55:57 localhost chat[4558]: ^M
Mar 20 20:55:57 localhost chat[4558]: OK^M
Mar 20 20:55:57 localhost chat[4558]: ^M
Mar 20 20:55:57 localhost chat[4558]: CONNECT
Mar 20 20:55:57 localhost chat[4558]: -- got it
Mar 20 20:55:57 localhost chat[4558]: send (^M)
Mar 20 20:55:57 localhost pppd[4557]: Serial connection established.
Mar 20 20:55:57 localhost pppd[4557]: Using interface ppp0
Mar 20 20:55:57 localhost pppd[4557]: Connect: ppp0 /dev/ttyS0
Mar 20 20:55:58 localhost pppd[4557]: Warning - secret file /etc/ppp/pap-secrets has world and/or group access
Mar 20 20:56:00 localhost pppd[4557]: Warning - secret file /etc/ppp/chap-secrets has world and/or group access
Mar 20 20:56:00 localhost pppd[4557]: CHAP authentication succeeded
Mar 20 20:56:00 localhost pppd[4557]: CHAP authentication succeeded
Mar 20 20:56:01 localhost kernel: PPP Deflate Compression mole registered
Mar 20 20:56:02 localhost pppd[4557]: Could not determine remote IP address: defaulting to 10.64.64.64
Mar 20 20:56:02 localhost pppd[4557]: local IP address 10.144.202.159
Mar 20 20:56:02 localhost pppd[4557]: remote IP address 10.64.64.64
Mar 20 20:56:02 localhost pppd[4557]: primary DNS address 211.138.200.69
Mar 20 20:56:02 localhost pppd[4557]: secondary DNS address 211.103.13.101