我已经缩小了与以下交易所沟通的失败。我可以看到从数据包＃74开始的TCP建立SYN，SYN / ACK和ACK数据包。 22ms后，报告连接丢失（非常靠近PSH数据包＃77），我无法理解为什么。它是在确认错误的SEQ吗？如果重要，通信就在PLC链路上。 .6232地址属于我的链接。
非常感谢提前。
证据：
EVSE通信控制器（我无权查看其代码）报告以下事件序列：
[16/11/23_13:38:37:606] [Message] Sdp request successfully received and checked!
[16/11/23_13:38:37:797] [Message] TCP connection established ...
[16/11/23_13:38:37:801] [Message] Expected next Request: SupportedAppProtocol
[16/11/23_13:38:37:819] [Message] TCP connection lost ...
使用来自同一EVSE网络的这些数据包tcpdump：
#71 13:38:37.603416 IP6 fe80::201:87ff:fe05:2cbf > ff02::1:ff62:6232: ICMP6, neighbor solicitation, who has fe80::201:1ff:fe62:6232, length 32
0x0000: 3333 ff62 6232 0001 8705 2cbf 86dd 6000 33.bb2....,...`.
0x0010: 0000 0020 3aff fe80 0000 0000 0000 0201 ....:...........
0x0020: 87ff fe05 2cbf ff02 0000 0000 0000 0000 ....,...........
0x0030: 0001 ff62 6232 8700 4ce8 0000 0000 fe80 ...bb2..L.......
0x0040: 0000 0000 0000 0201 01ff fe62 6232 0101 ...........bb2..
0x0050: 0001 8705 2cbf ....,.
#72 13:38:37.620216 IP6 fe80::201:1ff:fe62:6232 > fe80::201:87ff:fe05:2cbf: ICMP6, neighbor advertisement, tgt is fe80::201:1ff:fe62:6232, length 32
0x0000: 0001 8705 2cbf 0001 0162 6232 86dd 6000 ....,....bb2..`.
0x0010: 0000 0020 3aff fe80 0000 0000 0000 0201 ....:...........
0x0020: 01ff fe62 6232 fe80 0000 0000 0000 0201 ...bb2..........
0x0030: 87ff fe05 2cbf 8800 389b 6000 0000 fe80 ....,...8.`.....
0x0040: 0000 0000 0000 0201 01ff fe62 6232 0201 ...........bb2..
0x0050: 0001 0162 6232 ...bb2
#73 13:38:37.620431 IP6 fe80::201:87ff:fe05:2cbf.15118 > fe80::201:1ff:fe62:6232.56978: UDP, length 28
0x0000: 0001 0162 6232 0001 8705 2cbf 86dd 6000 ...bb2....,...`.
0x0010: 0000 0024 1140 fe80 0000 0000 0000 0201 ...$.@..........
0x0020: 87ff fe05 2cbf fe80 0000 0000 0000 0201 ....,...........
0x0030: 01ff fe62 6232 3b0e de92 0024 ac61 01fe ...bb2;....$.a..
0x0040: 9001 0000 0014 fe80 0000 0000 0000 0201 ................
0x0050: 87ff fe05 2cbf cdec 1000 ....,.....
#74 13:38:37.784028 IP6 fe80::201:1ff:fe62:6232.56056 > fe80::201:87ff:fe05:2cbf.52716: Flags [S], seq 7266836, win 3107, options [mss 1440], length 0
0x0000: 0001 8705 2cbf 0001 0162 6232 86dd 6000 ....,....bb2..`.
0x0010: 0000 0018 06ff fe80 0000 0000 0000 0201 ................
0x0020: 01ff fe62 6232 fe80 0000 0000 0000 0201 ...bb2..........
0x0030: 87ff fe05 2cbf daf8 cdec 006e e214 0000 ....,......n....
0x0040: 0000 6002 0c23 ea52 0000 0204 05a0 ..`..#.R......
#75 13:38:37.784415 IP6 fe80::201:87ff:fe05:2cbf.52716 > fe80::201:1ff:fe62:6232.56056: Flags [S.], seq 206804358, ack 7266837, win 14400, options [mss 1440], length 0
0x0000: 0001 0162 6232 0001 8705 2cbf 86dd 6000 ...bb2....,...`.
0x0010: 0000 0018 0640 fe80 0000 0000 0000 0201 .....@..........
0x0020: 87ff fe05 2cbf fe80 0000 0000 0000 0201 ....,...........
0x0030: 01ff fe62 6232 cdec daf8 0c53 9586 006e ...bb2.....S...n
0x0040: e215 6012 3840 1c4b 0000 0204 05a0 ..`.8@.K......
#76 13:38:37.794237 IP6 fe80::201:1ff:fe62:6232.56056 > fe80::201:87ff:fe05:2cbf.52716: Flags [.], ack 1, win 3107, length 0
0x0000: 0001 8705 2cbf 0001 0162 6232 86dd 6000 ....,....bb2..`.
0x0010: 0000 0014 06ff fe80 0000 0000 0000 0201 ................
0x0020: 01ff fe62 6232 fe80 0000 0000 0000 0201 ...bb2..........
0x0030: 87ff fe05 2cbf daf8 cdec 006e e215 0c53 ....,......n...S
0x0040: 9587 5010 0c23 6011 0000 ..P..#`...
#77 13:38:37.810215 IP6 fe80::201:1ff:fe62:6232.56056 > fe80::201:87ff:fe05:2cbf.52716: Flags [P.], seq 1:18, ack 1, win 3107, length 17
0x0000: 0001 8705 2cbf 0001 0162 6232 86dd 6000 ....,....bb2..`.
0x0010: 0000 0025 06ff fe80 0000 0000 0000 0201 ...%............
0x0020: 01ff fe62 6232 fe80 0000 0000 0000 0201 ...bb2..........
0x0030: 87ff fe05 2cbf daf8 cdec 006e e215 0c53 ....,......n...S
0x0040: 9587 5018 0c23 ebbc 0000 01fe 8001 0000 ..P..#..........
0x0050: 0009 809a 0010 1108 4080 20 ........@..
#78 13:38:37.810533 IP6 fe80::201:87ff:fe05:2cbf.52716 > fe80::201:1ff:fe62:6232.56056: Flags [.], ack 18, win 14400, length 0
0x0000: 0001 0162 6232 0001 8705 2cbf 86dd 6000 ...bb2....,...`.
0x0010: 0000 0014 0640 fe80 0000 0000 0000 0201 .....@..........
0x0020: 87ff fe05 2cbf fe80 0000 0000 0000 0201 ....,...........
0x0030: 01ff fe62 6232 cdec daf8 0c53 9587 006e ...bb2.....S...n
0x0040: e226 5010 3840 33e3 0000 .&P.8@3...
#79 13:38:37.814004 IP6 fe80::201:1ff:fe62:6232.56056 > fe80::201:87ff:fe05:2cbf.52716: Flags [.], ack 1, win 3107, length 0
0x0000: 0001 8705 2cbf 0001 0162 6232 86dd 6000 ....,....bb2..`.
0x0010: 0000 0014 06ff fe80 0000 0000 0000 0201 ................
0x0020: 01ff fe62 6232 fe80 0000 0000 0000 0201 ...bb2..........
0x0030: 87ff fe05 2cbf daf8 cdec 006e e215 0c53 ....,......n...S
0x0040: 9587 5010 0c23 6011 0000 ..P..#`...
#80 13:38:37.814310 IP6 fe80::201:87ff:fe05:2cbf.52716 > fe80::201:1ff:fe62:6232.56056: Flags [.], ack 18, win 14400, length 0
0x0000: 0001 0162 6232 0001 8705 2cbf 86dd 6000 ...bb2....,...`.
0x0010: 0000 0014 0640 fe80 0000 0000 0000 0201 .....@..........
0x0020: 87ff fe05 2cbf fe80 0000 0000 0000 0201 ....,...........
0x0030: 01ff fe62 6232 cdec daf8 0c53 9587 006e ...bb2.....S...n
0x0040: e226 5010 3840 33e3 0000 .&P.8@3...
#81 13:38:37.817695 IP6 fe80::201:87ff:fe05:2cbf.52716 > fe80::201:1ff:fe62:6232.56056: Flags [F.], seq 1, ack 18, win 14400, length 0
0x0000: 0001 0162 6232 0001 8705 2cbf 86dd 6000 ...bb2....,...`.
0x0010: 0000 0014 0640 fe80 0000 0000 0000 0201 .....@..........
0x0020: 87ff fe05 2cbf fe80 0000 0000 0000 0201 ....,...........
0x0030: 01ff fe62 6232 cdec daf8 0c53 9587 006e ...bb2.....S...n
0x0040: e226 5011 3840 33e2 0000 .&P.8@3...
答案 0 :(得分：0)
通信终止的真正原因是电力线通信控制器上的网络管理密钥被重置并且链路丢失。与通信无关，这就是为什么它们没有出现在Wireshark日志中。
发送的一个数据包是EVSE未准备好的CableCheck.REQ。 （正确的数据包应该是EVSE日志所指示的SupportedAppProtocol.REQ。）