On Wed, Jan 22, 2025 at 06:09 PM +08, Jiayuan Chen wrote:
Currently, only TCP supports strparser, but sockmap doesn't intercept non-TCP connections to attach strparser. For example, with UDP, although the read/write handlers are replaced, strparser is not executed due to the lack of a read_sock operation.
Furthermore, in udp_bpf_recvmsg(), it checks whether the psock has data, and if not, it falls back to the native UDP read interface, making UDP + strparser appear to read correctly. According to its commit history, this behavior is unexpected.
Moreover, since UDP lacks the concept of streams, we intercept it directly.
Fixes: 1fa1fe8ff161 ("bpf, sockmap: Test shutdown() correctly exits epoll and recv()=0") Signed-off-by: Jiayuan Chen mrpre@163.com
Acked-by: Jakub Sitnicki jakub@cloudflare.com