tcplife: fix dport byte order (iovisor#1813)

commit 95b3d8c fixed the dport filtering of the kprobes variant by
moving the network byte order to host byte order conversation before the
filtering. Before submitting the perf event the byte order of the dport
was again converted - this commit removes this double conversion.

tools/tcplife.py

@@ -202,7 +202,7 @@
  data4.daddr = sk->__sk_common.skc_daddr;
  // a workaround until data4 compiles with separate lport/dport
  data4.pid = pid;
- data4.ports = ntohs(dport) + ((0ULL + lport) << 32);
+ data4.ports = dport + ((0ULL + lport) << 32);
  if (mep == 0) {
  bpf_get_current_comm(&data4.task, sizeof(data4.task));
  } else {
@@ -219,7 +219,7 @@
  bpf_probe_read(&data6.daddr, sizeof(data6.daddr),
  sk->__sk_common.skc_v6_daddr.in6_u.u6_addr32);
  // a workaround until data6 compiles with separate lport/dport
- data6.ports = ntohs(dport) + ((0ULL + lport) << 32);
+ data6.ports = dport + ((0ULL + lport) << 32);
  data6.pid = pid;
  if (mep == 0) {
  bpf_get_current_comm(&data6.task, sizeof(data6.task));