[src/trunk]: src/sys/netinet Remove the unused 'multicast' argument from tcp_...

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/04abfb01c382
branches:  trunk
changeset: 829694:04abfb01c382
user:      maxv <maxv%NetBSD.org@localhost>
date:      Thu Feb 08 20:19:30 2018 +0000

description:
Remove the unused 'multicast' argument from tcp_vtw_input, and remove
the now-unused multicast detection code. It couldn't have been correct on
IPv6, since multicast packets are kicked at the beginning of the function.

diffstat:

 sys/netinet/tcp_input.c |  23 ++++-------------------
 1 files changed, 4 insertions(+), 19 deletions(-)

diffs (56 lines):

diff -r 238370f9ebc1 -r 04abfb01c382 sys/netinet/tcp_input.c
--- a/sys/netinet/tcp_input.c   Thu Feb 08 20:18:03 2018 +0000
+++ b/sys/netinet/tcp_input.c   Thu Feb 08 20:19:30 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tcp_input.c,v 1.371 2018/02/08 20:10:55 maxv Exp $     */
+/*     $NetBSD: tcp_input.c,v 1.372 2018/02/08 20:19:30 maxv Exp $     */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -148,7 +148,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tcp_input.c,v 1.371 2018/02/08 20:10:55 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tcp_input.c,v 1.372 2018/02/08 20:19:30 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -1006,7 +1006,7 @@
  * nevertheless have to respond to it per the spec.
  */
 static void tcp_vtw_input(struct tcphdr *th, vestigial_inpcb_t *vp,
-                         struct mbuf *m, int tlen, int multicast)
+    struct mbuf *m, int tlen)
 {
        int             tiflags;
        int             todrop;
@@ -1534,27 +1534,12 @@
        }
 #endif
        else if (vestige.valid) {
-               int mc = 0;
-
                /* We do not support the resurrection of vtw tcpcps. */
                if (tcp_input_checksum(af, m, th, toff, off, tlen))
                        goto badcsum;
 
-               switch (af) {
-#ifdef INET6
-               case AF_INET6:
-                       mc = IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst);
-                       break;
-#endif
-
-               case AF_INET:
-                       mc = (IN_MULTICAST(ip->ip_dst.s_addr) ||
-                           in_broadcast(ip->ip_dst, m_get_rcvif_NOMPSAFE(m)));
-                       break;
-               }
-
                tcp_fields_to_host(th);
-               tcp_vtw_input(th, &vestige, m, tlen, mc);
+               tcp_vtw_input(th, &vestige, m, tlen);
                m = NULL;
                goto drop;
        }