Hello, an update. added "listen bgp v6only;" in the global section of my bird6.conf seems to solve it. a mistery still why it kept running with exchange connection then, that put me on the wrong foot. i'd "always saw" a "bird6: sk_open: bind: Address already in use" which i ignored for later research as my IX connection was actually working. so that seems to be sovled (for me), but question about compile stays open. Regards, Arjan Filius On Fri, 28 May 2010, Arjan Filius wrote:

Hello,

Starting to configure bird6 for iBGP and ran in a repeatable crash running 1.2.2 from ppa on ubuntu 10.04 LTS x64.

as soon as i configure in a protocol bgp it's neighbor like: neighbor 2A00:1388:FFFF::3 as MYAS;

bird6 crashes i unset the ulimit core to produce a core file, but no debugging info is included:

# gdb `which bird6` core GNU gdb (GDB) 7.1-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/sbin/bird6...(no debugging symbols found)...done. [New Thread 16308]

warning: Can't read pathname for load map: Input/output error. Reading symbols from /lib/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/librt.so.1 Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/libc.so.6 Reading symbols from /lib/libpthread.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/libpthread.so.0 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Core was generated by `bird6'. Program terminated with signal 11, Segmentation fault. #0 0x00007f4c985bddd5 in ?? () (gdb) bt #0 0x00007f4c985bddd5 in ?? () #1 0x00007f4c985be22f in ?? () #2 0x00007f4c9859ec33 in ?? () #3 0x00007f4c98596850 in ?? () #4 0x00007f4c985bc447 in ?? () #5 0x00007f4c985be458 in ?? () #6 0x00007f4c985c1cec in main () (gdb)

network on the interface is: 2a00:1388:ffff::2/124

as soon i change the IP a little so it leaves the /124 it doesn't crash anymore.

i've a succesfull eBGP setup.

Now to try to debug the situation i tried to compile a 1.2.2 ipv6 version from source, but i run stuck at the moment:

ran:

bird-1.2.2# ./configure --sysconfdir=/ --enable-debug --enable-ipv6 checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for library containing clock_gettime... -lrt checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking what CFLAGS should we use... -g -O2 -Wall -Wstrict-prototypes -Wno-parentheses -Wno-pointer-sign checking how to run the C preprocessor... gcc -E checking for a BSD-compatible install... /usr/bin/install -c checking for ranlib... ranlib checking for flex... flex checking for bison... bison checking for gm4... no checking for m4... m4 checking Linux kernel version... VERSION: UTS_RELEASE checking which OS configuration should we use... ./sysdep/cf/linux-v6.h checking system-dependent directories... sysdep/linux/netlink sysdep/linux sysdep/unix lib checking protocols... ok checking for linux/rtnetlink.h... yes checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking syslog.h usability... yes checking syslog.h presence... yes checking for syslog.h... yes checking alloca.h usability... yes checking alloca.h presence... yes checking for alloca.h... yes checking whether 'struct sockaddr' has sa_len... no checking whether byte ordering is bigendian... no checking for char... yes checking size of char... 1 checking for short int... yes checking size of short int... 2 checking for int... yes checking size of int... 4 checking for long int... yes checking size of long int... 8 checking for 8-bit type... char checking for 16-bit type... short int checking for 32-bit type... int checking usual alignment of structures... 16 checking characteristics of time_t... 64-bit signed checking for struct ip_mreqn... yes checking for dmalloc_debug in -ldmalloc... no checking for malloc in -lefence... no checking for add_history in -lhistory... yes checking for tgetent in -lncurses... yes checking for rl_callback_read_char in -lreadline... yes checking for rl_crlf in -lreadline... yes checking for rl_ding in -lreadline... yes configure: creating ./config.status config.status: creating Makefile config.status: creating obj/Makefile config.status: creating obj/Rules config.status: creating obj/sysdep/autoconf.h config.status: obj/sysdep/autoconf.h is unchanged config.status: executing merge commands Merging system-dependent modules (sysdep/linux/netlink sysdep/linux sysdep/unix lib)

BIRD was configured with the following options: Source directory: . Object directory: obj System configuration: ./sysdep/cf/linux-v6.h Debugging: yes Routing protocols: bgp ospf pipe rip static Client: yes bird-1.2.2# make make -C obj all make[1]: Entering directory `/root/arfi/src/bird-1.2.2/obj' make depend make[2]: Entering directory `/root/arfi/src/bird-1.2.2/obj' mkdir -p nest filter proto/bgp proto/ospf proto/pipe proto/rip proto/static client doc touch .dir-stamp set -e ; for a in lib conf ; do make -C $a depend ; done make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/lib' gcc -I../ -I../.. -MM bitops.c checksum.c event.c io.c ip.c ipv6.c krt.c lists.c log.c main.c md5.c mempool.c netlink.c patmatch.c printf.c random.c resource.c slab.c slists.c xmalloc.c >depend make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/lib' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/conf' m4 -P ../../conf/gen_keywords.m4 ../../conf/confbase.Y ../../sysdep/unix/config.Y ../../sysdep/unix/krt.Y ../../sysdep/linux/netlink/netlink.Y ../../nest/config.Y ../../filter/config.Y ../../proto/bgp/config.Y ../../proto/ospf/config.Y ../../proto/pipe/config.Y ../../proto/rip/config.Y ../../proto/static/config.Y >keywords.h m4 -P ../../conf/gen_commands.m4 ../../client/cmds.m4 ../../conf/confbase.Y ../../sysdep/unix/config.Y ../../sysdep/unix/krt.Y ../../sysdep/linux/netlink/netlink.Y ../../nest/config.Y ../../filter/config.Y ../../proto/bgp/config.Y ../../proto/ospf/config.Y ../../proto/pipe/config.Y ../../proto/rip/config.Y ../../proto/static/config.Y | sort >commands.h m4 -P ../../conf/gen_parser.m4 ../../conf/confbase.Y ../../sysdep/unix/config.Y ../../sysdep/unix/krt.Y ../../sysdep/linux/netlink/netlink.Y ../../nest/config.Y ../../filter/config.Y ../../proto/bgp/config.Y ../../proto/ospf/config.Y ../../proto/pipe/config.Y ../../proto/rip/config.Y ../../proto/static/config.Y >cf-parse.y bison -bcf-parse -dv -pcf_ cf-parse.y flex -s -B -8 -ocf-lex.c -Pcf_ cf-lex.l gcc -I../ -I../.. -MM cf-parse.tab.c cf-lex.c conf.c >depend make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/conf' set -e ; for a in nest filter proto/bgp proto/ospf proto/pipe proto/rip proto/static client ; do make -C $a -f /root/arfi/src/bird-1.2.2/$a/Makefile depend ; done make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/nest' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/nest' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/filter' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/filter' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/proto/bgp' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/proto/bgp' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/proto/ospf' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/proto/ospf' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/proto/pipe' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/proto/pipe' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/proto/rip' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/proto/rip' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/proto/static' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/proto/static' make[3]: Entering directory `/root/arfi/src/bird-1.2.2/obj/client' make[3]: `depend' is up to date. make[3]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/client' make[2]: Leaving directory `/root/arfi/src/bird-1.2.2/obj' touch .dep-stamp set -e ; for a in lib conf ; do make -C $a subdir ; done make[2]: Entering directory `/root/arfi/src/bird-1.2.2/obj/lib' gcc -I../ -I../.. -g -O2 -Wall -Wstrict-prototypes -Wno-parentheses -Wno-pointer-sign -o bitops.o -c bitops.c gcc -I../ -I../.. -g -O2 -Wall -Wstrict-prototypes -Wno-parentheses -Wno-pointer-sign -o checksum.o -c checksum.c gcc -I../ -I../.. -g -O2 -Wall -Wstrict-prototypes -Wno-parentheses -Wno-pointer-sign -o event.o -c event.c event.c: In function ‘ev_run_list’: ../lib/lists.c:132: warning: dereferencing pointer ‘({anonymous})’ does break strict-aliasing rules ../lib/lists.c:115: note: initialized from here gcc -I../ -I../.. -g -O2 -Wall -Wstrict-prototypes -Wno-parentheses -Wno-pointer-sign -o io.o -c io.c io.c: In function ‘sysio_process_rx_cmsgs’: io.c:704: error: dereferencing pointer to incomplete type io.c:705: error: dereferencing pointer to incomplete type io.c: In function ‘sk_read’: io.c:1380: error: invalid application of ‘sizeof’ to incomplete type ‘struct in6_pktinfo’ make[2]: *** [io.o] Error 1 make[2]: Leaving directory `/root/arfi/src/bird-1.2.2/obj/lib' make[1]: *** [subdir] Error 2 make[1]: Leaving directory `/root/arfi/src/bird-1.2.2/obj' make: *** [all] Error 2 bird-1.2.2#

Tried the ppa-source too, but same result.

Anyone an idea: 1)what may go wrong causing the bird6 crash on startup? 2) what to do to get bird compiled from source.

Thanks in advance.

-- Arjan Filius mailto:iafilius@xs4all.nl