Re: selftests: net: ip_local_port_range.c:152:17: error: use of undeclared identifier 'IPPROTO_MPTCP'

[Maxim Galaganov]

On 09.02.2024 13:55, Naresh Kamboju wrote:
> I encountered the following build errors while compiling the selftests net
> test cases on Linux next-20240208 tag with clang toolchain.
>
> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
>
> selftests/net/ip_local_port_range
> ip_local_port_range.c:152:17: error: use of undeclared identifier
> 'IPPROTO_MPTCP'
>    152 |         .so_protocol    = IPPROTO_MPTCP,
>        |                           ^
> ip_local_port_range.c:176:17: error: use of undeclared identifier
> 'IPPROTO_MPTCP'
>    176 |         .so_protocol    = IPPROTO_MPTCP,
>        |                           ^
> 2 errors generated.
>
> Build link,
>   - https://storage.tuxsuite.com/public/linaro/lkft/builds/2c4LtUoRSYhdGbErOY8hqHxc6Tu/

The glibc netinet/in.h header in the test container does not have 
IPPROTO_MPTCP definition. It is included first through netinet/ip.h and 
then __UAPI_DEF_IN_IPPROTO is set in linux/libc-compat.h -- so no 
definition comes from include/uapi/linux/in.h either.

# ldd --version
ldd (Debian GLIBC 2.31-13+deb11u7) 2.31
..

# grep -q IPPROTO_MPTCP /usr/include/netinet/in.h ; echo $?
1

I'll send an ifndef/define/endif IPPROTO_MPTCP patch to netdev once it's 
build tested. Thank you for the report.

Broken by commit 122db5e3634b ("selftests/net: add MPTCP coverage for 
IP_LOCAL_PORT_RANGE")

> --
> Linaro LKFT
> https://lkft.linaro.org