tcplife: fix dport filter on tracepoints

When using tracepoints, the destination port is retrieved in host
byte order and there is no need to convert it, contrary to the
kprobe version.

tools/tcplife.py

@@ -128,6 +128,7 @@ int kprobe__tcp_set_state(struct pt_regs *ctx, struct sock *sk, int state)
 
     // dport is either used in a filter here, or later
     u16 dport = sk->__sk_common.skc_dport;
+    dport = ntohs(dport);
     FILTER_DPORT
 
     /*
@@ -366,7 +367,7 @@ if args.pid:
         'if (pid != %s) { return 0; }' % args.pid)
 if args.remoteport:
     dports = [int(dport) for dport in args.remoteport.split(',')]
-    dports_if = ' && '.join(['dport != %d' % ntohs(dport) for dport in dports])
+    dports_if = ' && '.join(['dport != %d' % dport for dport in dports])
     bpf_text = bpf_text.replace('FILTER_DPORT',
         'if (%s) { birth.delete(&sk); return 0; }' % dports_if)
 if args.localport: