Florin Coras <fcoras.li...@gmail.com> schrieb am Mi., 21. Nov. 2018 um 17:18 Uhr:
> Hi Andreas, > > The trace lower suggests your tcp connection was freed but you still got > data for it. tcp-input and the checks in established should prevent that > from happening and the session layer should not receive any events after > the transport notifies it that the session will cleaned up. > > So, apart from calling vnet_disconnect_session () on an rx event, have you > done anything else to the code? > Not to the session code. I got a bit creative when creating the listening session and feeding the packets to ip-input. The actual code for the session process is here: https://gerrit.fd.io/r/c/15801/6/src/plugins/upf/upf_http_redirect_server.c#222 , I still need to address you comments there, but I don't think that this has anything to do with the crash. I'm going to test this a bit further with the http_server. Andreas > Regards, > Florin > > > On Nov 21, 2018, at 1:36 AM, Andreas Schultz < > andreas.schu...@travelping.com> wrote: > > Florin Coras <fcoras.li...@gmail.com> schrieb am Fr., 18. Mai 2018 um > 08:12 Uhr: > >> That http server is just example code that executes the contents of a get >> request as a cli commands within a spawned vpp process. So, if you want to >> disconnect _after_ the the reply is sent, call vnet_disconnect_session () >> at the end of http_cli_process. >> > > Came across this when searching for a similar problem. > > I tried exactly what Florin suggested in the rx_callback handle. Doing so > result in segmentation in multiple places. > > The first in tcp_input: > > Thread 1 "vpp_main" received signal SIGSEGV, Segmentation fault. > 0x00007ffff70d5b25 in tcp_handle_postponed_dequeues (wrk=0x7fffb5ac5f00) > at /usr/src/vpp/src/vnet/tcp/tcp_input.c:530 > 530 tc->flags &= ~TCP_CONN_DEQ_PENDING; > (gdb) print tc > $1 = (tcp_connection_t *) 0x0 > (gdb) bt > #0 0x00007ffff70d5b25 in tcp_handle_postponed_dequeues > (wrk=0x7fffb5ac5f00) at /usr/src/vpp/src/vnet/tcp/tcp_input.c:530 > #1 0x00007ffff70db8bb in tcp46_established_inline (vm=0x7ffff68f2340 > <vlib_global_main>, node=0x7fffb6dc0600, frame=0x7fffb5e1afc0, is_ip4=1) at > /usr/src/vpp/src/vnet/tcp/tcp_input.c:2160 > #2 0x00007ffff70db951 in tcp4_established (vm=0x7ffff68f2340 > <vlib_global_main>, node=0x7fffb6dc0600, from_frame=0x7fffb5e1afc0) at > /usr/src/vpp/src/vnet/tcp/tcp_input.c:2171 > #3 0x00007ffff6669ab2 in dispatch_node (vm=0x7ffff68f2340 > <vlib_global_main>, node=0x7fffb6dc0600, type=VLIB_NODE_TYPE_INTERNAL, > dispatch_state=VLIB_NODE_STATE_POLLING, frame=0x7fffb5e1afc0, > last_time_stamp=6761417783745271) > at /usr/src/vpp/src/vlib/main.c:1109 > #4 0x00007ffff666a092 in dispatch_pending_node (vm=0x7ffff68f2340 > <vlib_global_main>, pending_frame_index=10, > last_time_stamp=6761417783745271) at /usr/src/vpp/src/vlib/main.c:1267 > #5 0x00007ffff666bd23 in vlib_main_or_worker_loop (vm=0x7ffff68f2340 > <vlib_global_main>, is_main=1) at /usr/src/vpp/src/vlib/main.c:1694 > #6 0x00007ffff666c4fc in vlib_main_loop (vm=0x7ffff68f2340 > <vlib_global_main>) at /usr/src/vpp/src/vlib/main.c:1768 > #7 0x00007ffff666d2a9 in vlib_main (vm=0x7ffff68f2340 <vlib_global_main>, > input=0x7fffb53fffb0) at /usr/src/vpp/src/vlib/main.c:1961 > #8 0x00007ffff66c7d2d in thread0 (arg=140737329963840) at > /usr/src/vpp/src/vlib/unix/main.c:606 > #9 0x00007ffff5ee2e04 in clib_calljmp () from > /usr/src/vpp/build-root/install-vpp_debug-native/vpp/lib/libvppinfra.so.19.01 > #10 0x00007fffffffd0f0 in ?? () > #11 0x00007ffff66c81fa in vlib_unix_main (argc=44, argv=0x5555558939b0) at > /usr/src/vpp/src/vlib/unix/main.c:675 > #12 0x000055555555cce8 in main (argc=44, argv=0x5555558939b0) at > /usr/src/vpp/src/vpp/vnet/main.c:272 > > After adding a check for tc == NULL, it crashes with > > 0: /usr/src/vpp/src/vnet/session/session.h:394 (session_get_from_handle) > assertion `! pool_is_free (smm->wrk[thread_index].sessions, _e)' fails > > So it seems that is currently not possible to use vnet_disconnect_session > () from a rx_callback directly. > > Any hints on how to disconnect the tcp session from the rx callback? > > Regards > Andreas > > >> Florin >> >> >> On May 17, 2018, at 10:52 PM, muziding <muziding...@163.com> wrote: >> >> Hi >> >> I want to make the example of http server actively close the client >> connection, instead of waiting for the client to close connection, after >> http server has responded to the client request. 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Andreas Schultz > > ----------------------- enabling your networks ---------------------- > Travelping GmbH Phone: +49-391-81 90 99 0 > <+49-391-81%2090%2099%200> > Roentgenstr. 13 Fax: +49-391-81 90 99 299 > <+49-391-81%2090%2099%20299> > 39108 Magdeburg Email: i...@travelping.com > GERMANY Web: http://www.travelping.com > > Company Registration: Amtsgericht Stendal Reg No.: HRB 10578 > Geschaeftsfuehrer: Holger Winkelmann VAT ID No.: DE236673780 > --------------------------------------------------------------------- > > > -- -- Dipl.-Inform. Andreas Schultz ----------------------- enabling your networks ---------------------- Travelping GmbH Phone: +49-391-81 90 99 0 Roentgenstr. 13 Fax: +49-391-81 90 99 299 39108 Magdeburg Email: i...@travelping.com GERMANY Web: http://www.travelping.com Company Registration: Amtsgericht Stendal Reg No.: HRB 10578 Geschaeftsfuehrer: Holger Winkelmann VAT ID No.: DE236673780 ---------------------------------------------------------------------
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