[lwip-users] about RST send in connect

[yueyue papa]

Hi all,

In which condition, lwIP will send RST in connect?

#################################
No.     Time        Source                Destination           Protocol Info
      1 0.000000    82.101.147.46         192.168.0.2           TCP      48013 > 4246 [PSH, ACK] Seq=1 Ack=1 Win=64800 Len=86
No.     Time        Source                Destination           Protocol Info
      2 0.000501    192.168.0.2           82.101.147.46         TCP      4246 > 48013 [PSH, ACK] Seq=1 Ack=87 Win=64557 Len=3
No.     Time        Source                Destination           Protocol Info
      3 0.715795    82.101.147.46         192.168.0.2           TCP      48013 > 4246 [ACK] Seq=87 Ack=4 Win=64797 Len=0
No.     Time        Source                Destination           Protocol Info
      4 0.715806    192.168.0.2           82.101.147.46         TCP      4246 > 48013 [PSH, ACK] Seq=4 Ack=87 Win=64557 Len=19
No.     Time        Source                Destination           Protocol Info
      5 1.434444    82.101.147.46         192.168.0.2           TCP      48013 > 4246 [ACK] Seq=87 Ack=23 Win=64778 Len=0
No.     Time        Source                Destination           Protocol Info
      6 6.384106    41.157.10.2           192.168.0.104         TCP      43636 > http-alt [SYN] Seq=0 Win=2920 Len=0 MSS=1452
No.     Time        Source                Destination           Protocol Info
      7 6.384462    192.168.0.104         41.157.10.2           TCP      http-alt > 43636 [SYN, ACK] Seq=0 Ack=1 Win=16384 Len=0 MSS=1460
No.     Time        Source                Destination           Protocol Info
      8 7.544831    41.157.10.2           192.168.0.104         TCP      43636 > http-alt [ACK] Seq=1 Ack=1 Win=2920 Len=0
No.     Time        Source                Destination           Protocol Info
      9 8.055439    41.157.10.2           192.168.0.104         TCP      43636 > http-alt [RST, ACK] Seq=272 Ack=1 Win=2920 Len=0
No.     Time        Source                Destination           Protocol Info
     10 8.055724    192.168.0.104         41.157.10.2           TCP      [TCP Window Update] http-alt > 43636 [ACK] Seq=1 Ack=1 Win=65535 Len=0
No.     Time        Source                Destination           Protocol Info
     11 8.092234    41.157.10.2           192.168.0.104         TCP      43636 > http-alt [RST, ACK] Seq=1 Ack=1 Win=2920 Len=0
No.     Time        Source                Destination           Protocol Info
     12 11.292255   Netgear_61:ac:8a      Vmware_9c:99:cf       ARP      Who has 192.168.0.104?  Tell 192.168.0.1
No.     Time        Source                Destination           Protocol Info
     13 11.292445   Vmware_9c:99:cf       Netgear_61:ac:8a      ARP      192.168.0.104 is at 00:0c:29:9c:99:cf
#################################

Why lwIP send a RST ?
No.     Time        Source                Destination           Protocol Info
      9 8.055439    41.157.10.2           192.168.0.104        
TCP      43636 > http-alt [RST, ACK] Seq=272 Ack=1 Win=2920 Len=0

Is there any information for what happend?

Lee