android4.2 添加 kernal 对 PPP 的支持_android kernel l2tp 支持-优快云博客

本文介绍如何在内核层面配置PPTP协议支持，并通过mtpd程序建立PPTP VPN连接。包括内核配置步骤、mtpd命令参数详解及成功连接后的网络设置。

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1、修改内核配置

Networking support (NET [=y])
-> Networking options
-> Network packet filtering framework (Netfilter) (NETFILTER [=y])
-> Core Netfilter Configuration
-> Netfilter connection tracking support
<*> PPtP protocol support

Device Drivers
-> Network device support (NETDEVICES [=y])
-> PPP (point-to-point protocol) support (PPP [=y])
<*> PPP (point-to-point protocol) support
<*> PPP BSD-Compress compression
<*> PPP Deflate compression
[*] PPP filtering
<*> PPP MPPE compression (encryption) (EXPERIMENTAL)
[*] PPP multilink support (EXPERIMENTAL)
<*> PPP over Ethernet (EXPERIMENTAL)
<*> PPP on L2TP Access Concentrator
<*> PPP on PPTP Network Server
<*> PPP support for async serial ports
<*> PPP support for sync tty ports

如果没有可以在下面的地址下载
https://android.googlesource.com/kernel/common/+/android-3.10/drivers/net/ppp/

2、使用mtpd程序连接vpn 以pptp为例

mtpd eth0 pptp [xxx.xxx.xxx.xxx] 1723 name [xxx] password [xxx] linkname vpn refuse-eap nodefaultroute usepeerdns idle 1800 mtu 1400 mru 1400 +mppe &

链接成功会多一个ppp0

ppp0 Link encap:Point-to-Point Protocol
inet addr:10.10.77.102 P-t-P:10.10.77.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1396 Metric:1
RX packets:33 errors:0 dropped:0 overruns:0 frame:0
TX packets:2332 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:2651 (2.5 KiB) TX bytes:344945 (336.8 KiB)

添加路由，并配置好dns

busybox route add -net 0.0.0.0 dev ppp0

root@android:/ # ping www.google.com
PING www.google.com (216.58.203.36) 56(84) bytes of data.
64 bytes from hkg12s10-in-f4.1e100.net (216.58.203.36): icmp_seq=1 ttl=56 time=107 ms
64 bytes from hkg12s10-in-f4.1e100.net (216.58.203.36): icmp_seq=2 ttl=56 time=207 ms
64 bytes from hkg12s10-in-f4.1e100.net (216.58.203.36): icmp_seq=3 ttl=56 time=118 ms
64 bytes from hkg12s10-in-f4.1e100.net (216.58.203.36): icmp_seq=4 ttl=56 time=116 ms
64 bytes from hkg12s10-in-f4.1e100.net (216.58.203.36): icmp_seq=5 ttl=56 time=112 ms