georgenicoll / cilium-ebpf-tc Goto Github PK

SEC("tc_prog")
int tc_main(struct __sk_buff *skb)
{
    void *data_end = (void *)(__u64)skb->data_end;
    void *data = (void *)(__u64)skb->data;
    struct ethhdr *eth;
    struct iphdr *ip;
    struct tcphdr *tcp;
    struct udphdr *udp;
    // int pid = (int) bpf_get_current_pid_tgid() >> 32;
    // if (skb->protocol != bpf_htons(ETH_P_IP))
    //     return TC_ACT_OK;
    __u32 pid = bpf_get_current_pid_tgid() >> 32;
    ```
    I want something like this. I know bpf_get_current_pid_tgid() can be used with ctx. So how should I do the edits?
    So that I can get the pid with the current code?