我们如何计算所有网络或计算android中的特定网络丢包？
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2 回答
1
为了扩展 Robert 的答案，UDP 是一种数据报尽力传送协议，没有任何会话、按顺序传送或错误检测的概念。如果您想要错误检测，您可能最终会实现大部分 TCP（嗯，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ip实用程序在这里应该有所帮助。在我的 SGS2 上，该实用程序是完整的，而不是像ifconfig.
示例用法：
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
我的手机已经植根，但这绝对不是必需的。
于 2012-05-10T15:50:07.980 回答
0
对于 TCP，可能有可能在 Linux 级别上获取值，但在 Java/Android 级别上却不行。
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。如果要在 UDP 级别计算数据丢失，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。但这将只允许您为自己的协议计算数据包丢失，而不是在一般级别上。
于 2012-05-10T13:52:27.053 回答