diff options
| author | Shivaji Kant <shivajikant@google.com> | 2026-08-01 05:12:59 +0000 |
|---|---|---|
| committer | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-08-03 03:46:46 +0200 |
| commit | dec58a70d4e7d7eb2764bb3cfcb8e6692b652f0c (patch) | |
| tree | 81eaa2de095fe38076d36f792d0eda0eb2ffd0a2 | |
| parent | 0b10b945479c954393d62ee3229d2f224a4ca91c (diff) | |
bpf: Allow IP_TRANSPARENT and IPV6_TRANSPARENT in bpf_{set,get}sockopt()
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().
Signed-off-by: Shivaji Kant <shivajikant@google.com>
Tested-by: Anubhav Singh <anubhavsinggh@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://lore.kernel.org/bpf/20260801051307.478469-1-shivajikant@google.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
| -rw-r--r-- | net/core/filter.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index eb4d299b1fec..25bfd9d7df4b 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5645,6 +5645,7 @@ 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; @@ -5671,6 +5672,7 @@ 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; |