compilation of netfilter missing libnftnl functions - undefined reference - (RASPBERRY pi 3B)

compilation of netfilter missing libnftnl functions - undefined reference - (RASPBERRY pi 3B)

[MELCHOR PENA, Bernardo Santiago]

Hi,

After downloading snapshots for NFTABLES and LIBNFTNL for 20200314 I proceeded to compile both library and NFTABLES

Library compiled with no errors.
libnftnl installed in /usr/local/lib

pi@raspberrypi:~/nftables-20200314 $ ls -lia /usr/local/lib/libnftnl.*
130735 -rwxr-xr-x 1 root root 974 Mar 15 10:55 /usr/local/lib/libnftnl.la
150748 lrwxrwxrwx 1 root root 18 Mar 15 10:55 /usr/local/lib/libnftnl.so -> libnftnl.so.11.2.0
150737 lrwxrwxrwx 1 root root 18 Mar 15 10:55 /usr/local/lib/libnftnl.so.11 -> libnftnl.so.11.2.0
130734 -rwxr-xr-x 1 root root 969712 Mar 15 10:55 /usr/local/lib/libnftnl.so.11.2.0


nftables gives this error when compiling with Make

/usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_flowtable_set_data@LIBNFTNL_13'
/usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_udata_nest_end@LIBNFTNL_14'
/usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_obj_set_data@LIBNFTNL_13'
/usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_flowtable_get_u64@LIBNFTNL_11'
/usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_flowtable_set_u64@LIBNFTNL_11'
/usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_udata_nest_start@LIBNFTNL_14'

I have tried to  point link under nftables-20200314/src/.libs
to point to /usr/local/lib with ln -sf /usr/local/lib/libnftnl.so ./libnftables.so

Errors then are the following after running Make
/usr/bin/ld: main.o: in function `main':
/home/pi/nftables-20200314/src/main.c:260: undefined reference to `nft_ctx_new'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:305: undefined reference to `nft_ctx_output_get_debug'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:276: undefined reference to `nft_ctx_set_dry_run'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:285: undefined reference to `nft_ctx_add_include_path'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:331: undefined reference to `nft_ctx_output_set_debug'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:367: undefined reference to `nft_ctx_output_set_flags'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:384: undefined reference to `nft_run_cmd_from_buffer'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:400: undefined reference to `nft_ctx_free'
/usr/bin/ld: /home/pi/nftables-20200314/src/main.c:386: undefined reference to `nft_run_cmd_from_filename'
/usr/bin/ld: cli.o: in function `cli_complete':
/home/pi/nftables-20200314/src/cli.c:133: undefined reference to `nft_run_cmd_from_buffer'
collect2: error: ld returned 1 exit status
make[3]: *** [Makefile:644: nft] Error 1
make[3]: Leaving directory '/home/pi/nftables-20200314/src'
make[2]: *** [Makefile:500: all] Error 2
make[2]: Leaving directory '/home/pi/nftables-20200314/src'
make[1]: *** [Makefile:479: all-recursive] Error 1
make[1]: Leaving directory '/home/pi/nftables-20200314'
make: *** [Makefile:388: all] Error 2


running RASPBIAN (buster) on raspberry 3B

Please, tell me what combination of lib and user app should I compile. I got kernel compiled for RASPBERRY with all nft enabled options but I am struggling with this part.

Thanks


Bernardo Santiago Melchor Pena,
IT Security Engineer | IT Security Infrastructure Unit
Infrastructure Services Section | Division of Information Technology
International Atomic Energy Agency | M: (+43) 699-165-22924 | Vienna International Centre, PO Box 100, 1400 Vienna, Austria |
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Re: compilation of netfilter missing libnftnl functions - undefined reference - (RASPBERRY pi 3B)

[Phil Sutter]

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Hi,

On Mon, Mar 16, 2020 at 08:16:28AM +0000, MELCHOR PENA, Bernardo Santiago wrote:
> After downloading snapshots for NFTABLES and LIBNFTNL for 20200314 I proceeded to compile both library and NFTABLES
> 
> Library compiled with no errors.
> libnftnl installed in /usr/local/lib
> 
> pi@raspberrypi:~/nftables-20200314 $ ls -lia /usr/local/lib/libnftnl.*
> 130735 -rwxr-xr-x 1 root root 974 Mar 15 10:55 /usr/local/lib/libnftnl.la
> 150748 lrwxrwxrwx 1 root root 18 Mar 15 10:55 /usr/local/lib/libnftnl.so -> libnftnl.so.11.2.0
> 150737 lrwxrwxrwx 1 root root 18 Mar 15 10:55 /usr/local/lib/libnftnl.so.11 -> libnftnl.so.11.2.0
> 130734 -rwxr-xr-x 1 root root 969712 Mar 15 10:55 /usr/local/lib/libnftnl.so.11.2.0
> 
> 
> nftables gives this error when compiling with Make
> 
> /usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_flowtable_set_data@LIBNFTNL_13'
> /usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_udata_nest_end@LIBNFTNL_14'
> /usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_obj_set_data@LIBNFTNL_13'
> /usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_flowtable_get_u64@LIBNFTNL_11'
> /usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_flowtable_set_u64@LIBNFTNL_11'
> /usr/bin/ld: ./.libs/libnftables.so: undefined reference to `nftnl_udata_nest_start@LIBNFTNL_14'
> 
> I have tried to  point link under nftables-20200314/src/.libs
> to point to /usr/local/lib with ln -sf /usr/local/lib/libnftnl.so ./libnftables.so

Looks like you're compiling against host's libnftnl by accident. Have a
look at the build script I attached to this email. Put it into nftables
TOPDIR and adjust LIBNFTNL_PATH, then call as regular user.

Cheers, Phil

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