Pull definitions for bpf_skc_lookup_tcp and bpf_sk_check_syncookie.
Signed-off-by: Lorenz Bauer <l...@cloudflare.com>
---
tools/include/uapi/linux/bpf.h | 36 +++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 983b25cb608d..587d7a3295bf 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2374,6 +2374,38 @@ union bpf_attr {
* Return
* A **struct bpf_sock** pointer on success, or NULL in
* case of failure.
+ *
+ * struct bpf_sock *bpf_skc_lookup_tcp(void *ctx, struct bpf_sock_tuple
*tuple, u32 tuple_size, u64 netns, u64 flags)
+ * Description
+ * Look for TCP socket matching *tuple*, optionally in a child
+ * network namespace *netns*. The return value must be checked,
+ * and if non-**NULL**, released via **bpf_sk_release**\ ().
+ *
+ * This function is identical to bpf_sk_lookup_tcp, except that it
+ * also returns timewait or request sockets. Use bpf_sk_fullsock
+ * or bpf_tcp_socket to access the full structure.
+ *
+ * This helper is available only if the kernel was compiled with
+ * **CONFIG_NET** configuration option.
+ * Return
+ * Pointer to **struct bpf_sock**, or **NULL** in case of failure.
+ * For sockets with reuseport option, the **struct bpf_sock**
+ * result is from **reuse->socks**\ [] using the hash of the tuple.
+ *
+ * int bpf_tcp_check_syncookie(struct bpf_sock *sk, void *iph, u32 iph_len,
struct tcphdr *th, u32 th_len)
+ * Description
+ * Check whether iph and th contain a valid SYN cookie ACK for
+ * the listening socket in sk.
+ *
+ * iph points to the start of the IPv4 or IPv6 header, while
+ * iph_len contains sizeof(struct iphdr) or sizeof(struct ip6hdr).
+ *
+ * th points to the start of the TCP header, while th_len contains
+ * sizeof(struct tcphdr).
+ *
+ * Return
+ * 0 if iph and th are a valid SYN cookie ACK, or a negative error
+ * otherwise.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -2474,7 +2506,9 @@ union bpf_attr {
FN(sk_fullsock), \
FN(tcp_sock), \
FN(skb_ecn_set_ce), \
- FN(get_listener_sock),
+ FN(get_listener_sock), \
+ FN(skc_lookup_tcp), \
+ FN(tcp_check_syncookie),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
--
2.19.1
