list sockets with bpftrace

sockets.bt

#!/usr/bin/env bpftrace

#define AF_INET 2
#define AF_INET6 10

iter:tcp
{
  $sk_common = ctx->sk_common;

  if ($sk_common == 0) {
    return;
  }

  $family = $sk_common->skc_family;

  if ($family == AF_INET)
  {
    // Manually extract and print the IP address bytes
    $s_b1 = ($sk_common->skc_rcv_saddr >> 24) & 0xFF;
    $s_b2 = ($sk_common->skc_rcv_saddr >> 16) & 0xFF;
    $s_b3 = ($sk_common->skc_rcv_saddr >> 8) & 0xFF;
    $s_b4 = $sk_common->skc_rcv_saddr & 0xFF;

    $d_b1 = ($sk_common->skc_daddr >> 24) & 0xFF;
    $d_b2 = ($sk_common->skc_daddr >> 16) & 0xFF;
    $d_b3 = ($sk_common->skc_daddr >> 8) & 0xFF;
    $d_b4 = $sk_common->skc_daddr & 0xFF;

    printf("State: %u, SRC: %d.%d.%d.%d:%u, DST: %d.%d.%d.%d:%u\n",
           $sk_common->skc_state,
           $s_b4, $s_b3, $s_b2, $s_b1,
           $sk_common->skc_num,
           $d_b4, $d_b3, $d_b2, $d_b1,
           bswap($sk_common->skc_dport)
          );
  }
}