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Date: Fri, 11 Apr 2014 15:19:41 +0800 From: chptx y <chptxy@...il.com> To: netdev@...r.kernel.org Subject: What causes these TCP packet getting lost in linux kernel Hi, I captured these packets with tcpdump on Android device(linux 3.4.39), these packets are in a HTTP GET Stream: 1 385.447794 Server -> Client: SEQ 12517, LEN 100 2 385.498345 Client -> Server: SEQ 3086, LEN 0, ACK 12617 3 385.497836 Server -> Client: SEQ 12617, LEN 1348 4 385.498644 Client -> Server: [DUP ACK] SEQ 3086, LEN 0, ACK 12617 5 385.498735 Server -> Client: SEQ 13965, LEN 619 6 385.498978 Client -> Server: [Dup ACK] SEQ 3086, LEN 0, ACK 12617 7 385.718843 Server -> Client: [Retrans] SEQ 13965, LEN 619 8 385.719280 Client -> Server: [DUP ACK] SEQ 3086, LEN 0, ACK 12617 9 385.733230 Server -> Client: [Retrans] SEQ 12617, LEN 1348 10 385.733602 Client -> Server: SEQ 3086, LEN 0, ACK 14584 11 385.909921 Server -> Client: [Retrans] SEQ 12617, LEN 1348 12 385.910449 Client -> Server: [DUP ACK][Window Upd.] SEQ 3086, LEN 0, ACK 14584 13 388.031541 Client -> Server: SEQ 832, LEN 0, ACK 4192, FIN 14 388.031681 Client -> Server: SEQ 3086, LEN 0, ACK 14584, FIN Client is my device run tcpdump on. packet #3 (SEQ 12617) has been captured yet, Is there any problem in kernel causes this packet getting lost in upper layer? why does kernel send packet #4 (DUP ACK) repeatedly? Thanks. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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