tree b4174abd7a7e99a44e12942bb6027fd1b206b8fd
parent 7ae215d23c12a939005f35d1848ca55b6109b9c0
author Lorenz Bauer <lmb@cloudflare.com> 1585522421 -0700
committer Alexei Starovoitov <ast@kernel.org> 1585601105 -0700

selftests: bpf: Add test for sk_assign

Attach a tc direct-action classifier to lo in a fresh network
namespace, and rewrite all connection attempts to localhost:4321
to localhost:1234 (for port tests) and connections to unreachable
IPv4/IPv6 IPs to the local socket (for address tests). Includes
implementations for both TCP and UDP.

Keep in mind that both client to server and server to client traffic
passes the classifier.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200329225342.16317-5-joe@wand.net.nz

Co-authored-by: Joe Stringer <joe@wand.net.nz>