Helper function bpf_get_socket_cookie
Definition
Copyright (c) 2015 The Libbpf Authors. All rights reserved.
If the struct sk_buff pointed by skb has a known socket, retrieve the cookie (generated by the kernel) of this socket. If no cookie has been set yet, generate a new cookie. Once generated, the socket cookie remains stable for the life of the socket. This helper can be useful for monitoring per socket networking traffic statistics as it provides a global socket identifier that can be assumed unique.
Returns
A 8-byte long unique number on success, or 0 if the socket field is missing inside skb.
static __u64 (* const bpf_get_socket_cookie)(void *ctx) = (void *) 46;
Usage
Docs could be improved
This part of the docs is incomplete, contributions are very welcome
Program types
This helper call can be used in the following program types:
- BPF_PROG_TYPE_CGROUP_SKB
- BPF_PROG_TYPE_CGROUP_SOCK
- BPF_PROG_TYPE_CGROUP_SOCK_ADDR
- BPF_PROG_TYPE_SCHED_ACT
- BPF_PROG_TYPE_SCHED_CLS
- BPF_PROG_TYPE_SK_REUSEPORT
- BPF_PROG_TYPE_SK_SKB
- BPF_PROG_TYPE_SOCKET_FILTER
- BPF_PROG_TYPE_SOCK_OPS
Example
Docs could be improved
This part of the docs is incomplete, contributions are very welcome