1. Android的netstat

netstat代码如下所示：

int netstat_main(int argc, char *argv[])

{

printf("Proto Recv-Q Send-Q Local Address Foreign Address State\n");

ipv4("/proc/net/tcp", "tcp");

ipv4("/proc/net/udp", "udp");

ipv6("/proc/net/tcp6", "tcp6");

ipv6("/proc/net/udp6", "udp6");

return 0;

}

如：cat /proc/net/tcp6内容如下：

# cat /proc/net/tcp6

sl  local_address                         remote_address                        st tx_queue rx_queue tr tm->when retrnsmt

uid     timeout inode

0: 00000000000000000000000000000000:EA60 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000 10031        0 8220 1 eded9b80 300 0 0 2 -1

1: 00000000000000000000000000000000:1873 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000 10071        0 8214 1 eded8000 300 0 0 2 -1

2: 0000000000000000FFFF00008204A8C0:E066 0000000000000000FFFF0000CEEB7D4A:0050 08 00000000:00000001 00:00000000 00000000  1000        0 5015 1 eded8b00 21 4 22 10 -1

3: 0000000000000000FFFF00008204A8C0:EA60 0000000000000000FFFF00005B04A8C0:CECD 01 00000000:00000000 00:00000000 00000000 10031        0 8376 1 ededa100 300 0 0 10 -1

如对于端口EA60 (60000)的uid为10031，大于10000的uid为app。

2. 在pid中如何寻找对应的uid

如我的10031在app_31中。

app_31    2761  1378  454512 28132 ffffffff 400e7ae8 S cn.mytest.test

# cat /proc/2761/cgroup

2:cpu:/bg_non_interactive

1:cpuacct:/uid/10031

其实很简单，app_xx对应的uid为10000+xx