[PATCH net-next 1/2] bpf: Allow IP_TRANSPARENT and IPV6_TRANSPARENT in bpf_{set,get}sockopt()
Shivaji Kant <[email protected]>
| Newsgroups | org.kernel.vger.bpf,org.kernel.vger.linux-kernel,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
Currently, bpf_setsockopt() and bpf_getsockopt() for SOL_IP and SOL_IPV6 only allow a small subset of socket options (such as IP_TOS, IPV6_TCLASS, and IPV6_AUTOFLOWLABEL). Calling bpf_setsockopt() with IP_TRANSPARENT or IPV6_TRANSPARENT fails with -EINVAL. Transparent proxying (TPROXY) and related networking components often rely on IP_TRANSPARENT and IPV6_TRANSPARENT to enable binding sockets to non-local IP addresses. Allow IP_TRANSPARENT for SOL_IP in sol_ip_sockopt() and IPV6_TRANSPARENT for SOL_IPV6 in sol_ipv6_sockopt(). Tested-by: Anubhav Singh <[email protected]> Signed-off-by: Shivaji Kant <[email protected]> --- net/core/filter.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 11bb0d236822..5a5980c671f3 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5640,6 +5640,7 @@ static int sol_ip_sockopt(struct sock *sk, int optname, switch (optname) { case IP_TOS: + case IP_TRANSPARENT: if (*optlen != sizeof(int)) return -EINVAL; break; @@ -5666,6 +5667,7 @@ static int sol_ipv6_sockopt(struct sock *sk, int optname, switch (optname) { case IPV6_TCLASS: case IPV6_AUTOFLOWLABEL: + case IPV6_TRANSPARENT: if (*optlen != sizeof(int)) return -EINVAL; break; -- 2.55.0.508.g3f0d502094-goog