Ticket #11894: MAF.with.keep-alive.protocol

File MAF.with.keep-alive.protocol, 6.3 KB (added by Bill Meek <keemllib@…>, 13 years ago)

Capture with the existing Keep-Alive (failure)

Line 
1This is an example of a reset connection when Keep-Alive is used.
2
3The timestamps below are in seconds since the start of protocol capture.
4
53 Way handshake and PSH requesting the backend's hostname...
6
7No. Time Source Destination Protocol Length Info
8 3 0.006451 mythandroid.local mc0.local TCP 74 36872 > myth-sapi [SYN] Seq=0 Win=14600 Len=0 MSS=1460 SACK_PERM=1 TSval=51728094 TSecr=0 WS=64
9
10No. Time Source Destination Protocol Length Info
11 4 0.006478 mc0.local mythandroid.local TCP 74 myth-sapi > 36872 [SYN, ACK] Seq=0 Ack=1 Win=14480 Len=0 MSS=1460 SACK_PERM=1 TSval=3601213 TSecr=51728094 WS=32
12
13No. Time Source Destination Protocol Length Info
14 5 0.009219 mythandroid.local mc0.local TCP 74 36872 > myth-sapi [ACK] Seq=1 Ack=1 Win=14656 Len=0 TSval=51728096 TSecr=3601213 [ETHERNET FRAME CHECK SEQUENCE INCORRECT]
15
16No. Time Source Destination Protocol Length Info
17 6 0.010111 mythandroid.local mc0.local TCP 194 36872 > myth-sapi [PSH, ACK] Seq=1 Ack=1 Win=14656 Len=128 TSval=51728096 TSecr=3601213
18
190000 00 1f d0 90 98 8f 18 46 17 e2 5b d4 08 00 45 00 .......F..[...E.
200010 00 b4 05 f5 40 00 40 06 af 4b c0 a8 01 e7 c0 a8 ....@.@..K......
210020 01 cc 90 08 19 90 75 d8 4b 2e 3e bb f4 f4 80 18 ......u.K.>.....
220030 00 e5 d0 d2 00 00 01 01 08 0a 03 15 4e e0 00 36 ............N..6
230040 f3 3d 47 45 54 20 2f 4d 79 74 68 2f 47 65 74 48 .=GET /Myth/GetH <----- Requesting the BE hostname
240050 6f 73 74 4e 61 6d 65 20 48 54 54 50 2f 31 2e 31 ostName HTTP/1.1
250060 0d 0a 41 63 63 65 70 74 2d 45 6e 63 6f 64 69 6e ..Accept-Encodin
260070 67 3a 20 69 64 65 6e 74 69 74 79 0d 0a 55 73 65 g: identity..Use
270080 72 2d 41 67 65 6e 74 3a 20 4d 41 46 0d 0a 48 6f r-Agent: MAF..Ho
280090 73 74 3a 20 31 39 32 2e 31 36 38 2e 31 2e 32 30 st: 192.168.1.20
2900a0 34 3a 36 35 34 34 0d 0a 43 6f 6e 6e 65 63 74 69 4:6544..Connecti
3000b0 6f 6e 3a 20 4b 65 65 70 2d 41 6c 69 76 65 0d 0a on: Keep-Alive.. <----- Client wants to do persistent connections.
3100c0 0d 0a ..
32
33MythTV ACKs the request...
34
35No. Time Source Destination Protocol Length Info
36 7 0.010128 mc0.local mythandroid.local TCP 66 myth-sapi > 36872 [ACK] Seq=1 Ack=129 Win=15552 Len=0 TSval=3601214 TSecr=51728096
37
38MythTV answers with the hostname...
39
40No. Time Source Destination Protocol Length Info
41 8 0.010520 mc0.local mythandroid.local TCP 424 myth-sapi > 36872 [PSH, ACK] Seq=1 Ack=129 Win=15552 Len=358 TSval=3601214 TSecr=51728096
42
430000 18 46 17 e2 5b d4 00 1f d0 90 98 8f 08 00 45 00 .F..[.........E.
440010 01 9a 07 cb 40 00 40 06 ac 8f c0 a8 01 cc c0 a8 ....@.@.........
450020 01 e7 19 90 90 08 3e bb f4 f4 75 d8 4b ae 80 18 ......>...u.K...
460030 01 e6 3c ad 00 00 01 01 08 0a 00 36 f3 3e 03 15 ..<........6.>..
470040 4e e0 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f N.HTTP/1.1 200 O
480050 4b 0d 0a 44 61 74 65 3a 20 38 20 4f 63 74 20 32 K..Date: 8 Oct 2
490060 30 31 33 20 31 37 3a 35 35 3a 32 33 0d 0a 53 65 013 17:55:23..Se
500070 72 76 65 72 3a 20 4c 69 6e 75 78 20 33 2e 32 2e rver: Linux 3.2.
510080 30 2d 34 33 2d 67 65 6e 65 72 69 63 2c 20 55 50 0-43-generic, UP
520090 6e 50 2f 31 2e 30 2c 20 4d 79 74 68 54 56 20 30 nP/1.0, MythTV 0
5300a0 2e 32 38 2e 32 30 31 33 31 30 30 31 2d 31 0d 0a .28.20131001-1..
5400b0 41 63 63 65 70 74 2d 52 61 6e 67 65 73 3a 20 62 Accept-Ranges: b
5500c0 79 74 65 73 0d 0a 43 61 63 68 65 2d 43 6f 6e 74 ytes..Cache-Cont
5600d0 72 6f 6c 3a 20 6e 6f 2d 63 61 63 68 65 3d 22 45 rol: no-cache="E
5700e0 78 74 22 2c 20 6d 61 78 2d 61 67 65 20 3d 20 35 xt", max-age = 5
5800f0 30 30 30 0d 0a 45 54 61 67 3a 20 22 64 61 33 39 000..ETag: "da39
590100 61 33 65 65 35 65 36 62 34 62 30 64 33 32 35 35 a3ee5e6b4b0d3255
600110 62 66 65 66 39 35 36 30 31 38 39 30 61 66 64 38 bfef95601890afd8
610120 30 37 30 39 22 0d 0a 43 6f 6e 6e 65 63 74 69 6f 0709"..Connectio <----- MythTV says, it does persistent connections
620130 6e 3a 20 4b 65 65 70 2d 41 6c 69 76 65 0d 0a 43 n: Keep-Alive..C
630140 6f 6e 74 65 6e 74 2d 54 79 70 65 3a 20 74 65 78 ontent-Type: tex
640150 74 2f 78 6d 6c 0d 0a 43 6f 6e 74 65 6e 74 2d 4c t/xml..Content-L
650160 65 6e 67 74 68 3a 20 35 39 0d 0a 0d 0a 3c 3f 78 ength: 59....<?x
660170 6d 6c 20 76 65 72 73 69 6f 6e 3d 22 31 2e 30 22 ml version="1.0"
670180 20 65 6e 63 6f 64 69 6e 67 3d 22 55 54 46 2d 38 encoding="UTF-8
680190 22 3f 3e 3c 53 74 72 69 6e 67 3e 6d 63 30 3c 2f "?><String>mc0</ <----- My backend's hostname
6901a0 53 74 72 69 6e 67 3e 0a String>.
70
71MythTV Android Frontend ACKs the PSH above...
72
73No. Time Source Destination Protocol Length Info
74 9 0.018273 mythandroid.local mc0.local TCP 66 36872 > myth-sapi [ACK] Seq=129 Ack=359 Win=15680 Len=0 TSval=51728097 TSecr=3601214
75
76MythTV closes its end of the connection...
77
78No. Time Source Destination Protocol Length Info
79 17 1.011603 mc0.local mythandroid.local TCP 66 myth-sapi > 36872 [FIN, ACK] Seq=359 Ack=129 Win=15552 Len=0 TSval=3601464 TSecr=51728097
80
81MythTV Android Frontend ACKs the FIN-ACK..
82
83No. Time Source Destination Protocol Length Info
84 18 1.094129 mythandroid.local mc0.local TCP 66 36872 > myth-sapi [ACK] Seq=129 Ack=360 Win=15680 Len=0 TSval=51728205 TSecr=3601464
85
86And, here's where the trouble starts.
87
88194 seconds later, MythTV Android Frontend sends FIN-ACK...
89
90No. Time Source Destination Protocol Length Info
91 74 194.616301 mythandroid.local mc0.local TCP 66 36872 > myth-sapi [FIN, ACK] Seq=129 Ack=360 Win=15680 Len=0 TSval=51747556 TSecr=3601464
92
93MythTV promptly resets the connection because it's already been closed.
94
95No. Time Source Destination Protocol Length Info
96 75 194.616319 mc0.local mythandroid.local TCP 54 myth-sapi > 36872 [RST] Seq=360 Win=0 Len=0
97