This patch updates struct tcp_zerocopy_receive to contain filed including
copybuf_address, copybuf_len, and others.

Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

These are defined in the kernel headers but missing from the list
of names, so strerrorname_np() returns NULL.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/mips/include/uapi/asm/errno.h#n95
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/sparc/include/uapi/asm/errno.h#n55

Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

This patch adds the TCPI_OPT_USEC_TS constant from Linux 6.14 to
sysdeps/gnu/netinet/tcp.h

This patch adds the TCPI_OPT_TFO_CHILD constant from Linux 6.15 to
sysdeps/gnu/netinet/tcp.h

Signed-off-by: Jeremy Harris <jgh@exim.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

These fields store timestamps when the system was running.  No Linux
systems existed before 1970, so these values are unused.  Switching
to unsigned types allows continued use of the existing struct layouts
beyond the year 2038.

The intent is to give distributions more time to switch to improved
interfaces that also avoid locking/data corruption issues.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

This patch adds the TCP_MD5SIG_FLAG_IFINDEX constant from Linux 5.6 to
sysdeps/gnu/netinet/tcp.h and updates struct tcp_md5sig accordingly to
contain the device index.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

Bump autoconf requirement to 2.71 to allow regenerating configure on
more recent distributions.  autoconf 2.71 has been in Fedora since F36
and is the current version in Debian stable (bookworm).  It appears to
be current in Gentoo as well.

All sysdeps configure and preconfigure scripts have also been
regenerated; all changes are trivial transformations that do not affect
functionality.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>