Remove the redundant `timestamp` field from `udp_conn_s` and use the
existing `s_options` bitmask to track SO_TIMESTAMP/SO_TIMESTAMPNS state.
The socket-level setsockopt/getsockopt already handles SO_TIMESTAMP via
_SO_SETOPT/_SO_GETOPT on s_options. The protocol-level handlers in
inet_sockif.c were intercepting the option before the socket layer,
causing s_options to never be set. This also meant SO_TIMESTAMPNS was
broken since inet_sockif.c only handled SO_TIMESTAMP.
Changes:
- Remove udp_conn_s.timestamp field from udp.h
- Remove SO_TIMESTAMP get/set handlers from inet_sockif.c, letting
them fall through to the socket-level handler
- Simplify udp_recvfrom.c to call cmsg_store_timestamp() directly,
which already checks s_options internally
- Align pkt_input.c software timestamp generation with ipv4/can by
removing per-socket SO_TIMESTAMP option check, only checking
hardware timestamp capability
Signed-off-by: wenquan1 <wenquan1@xiaomi.com>
7c87b4586c