Question

我们如何在android中计算所有网络或计算特定的网络丢包？

Answer 1

为了扩展Robert的答案，UDP是一种数据报尽力而为的传递协议，没有任何会话，有序传递或错误检测的概念。如果你想要错误检测，你可能最终会实现大部分TCP（好吧，至少是序列号，校验和和确认）。

幸运的是，对于TCP，内核会跟踪详细的统计信息。标准的ip实用程序在这里应该有所帮助。在我的SGS2上，该实用程序已完成，并没有像ifconfig那样减少。

使用示例：

root@android:/etc # ip -s -s link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    RX: bytes  packets  errors  dropped overrun mcast   
    23692      410      0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    23692      410      0       0       0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0      
2: gannet0: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1000 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 72:e0:e5:0a:dc:d6 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast   
    0          0        0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    0          0        0       0       0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0      
3: sit0: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN 
    link/sit 0.0.0.0 brd 0.0.0.0
    RX: bytes  packets  errors  dropped overrun mcast   
    0          0        0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    0          0        59      0       0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0      
4: ip6tnl0: <NOARP,UP,LOWER_UP> mtu 1452 qdisc noqueue state UNKNOWN 
    link/tunnel6 :: brd ::
    RX: bytes  packets  errors  dropped overrun mcast   
    0          0        0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    0          0        62      62      0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0      
5: rmnet0: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ppp 
    RX: bytes  packets  errors  dropped overrun mcast   
    1410177    2037     0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    199870     1831     0       0       0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0      
6: rmnet1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ppp 
    RX: bytes  packets  errors  dropped overrun mcast   
    0          0        0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    0          0        0       0       0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0      
7: rmnet2: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ppp 
    RX: bytes  packets  errors  dropped overrun mcast   
    0          0        0       0       0       0      
    RX errors: length  crc     frame   fifo    missed
               0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    0          0        0       0       0       0      
    TX errors: aborted fifo    window  heartbeat
               0        0       0       0

我的手机根深蒂固，但绝对不是必需的。

Answer 2

对于TCP，可能有可能获得Linux级别的值，但不能获得Java / Android级别的值。

对于UDP，这是不可能的，因为没有包含可用于检测数据包丢失的数据。如果要计算UDP级别的数据丢失，则必须实现自己的基于UDP的协议，并包括例如数据包计数器。但这样只允许您计算自己协议的丢包率，而不是一般级别。

如何计算android中的丢包？

2 个答案: