[src/trunk]: src/sys/netinet Separate MPLS-related routines from ip_hresolv_o...

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/39414b4aaa0a
branches:  trunk
changeset: 814918:39414b4aaa0a
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Tue Apr 19 09:29:54 2016 +0000

description:
Separate MPLS-related routines from ip_hresolv_output

No functional changes.

diffstat:

 sys/netinet/ip_output.c |  62 ++++++++++++++++++++++++++++--------------------
 1 files changed, 36 insertions(+), 26 deletions(-)

diffs (90 lines):

diff -r 24d06f15e0f6 -r 39414b4aaa0a sys/netinet/ip_output.c
--- a/sys/netinet/ip_output.c   Tue Apr 19 07:10:22 2016 +0000
+++ b/sys/netinet/ip_output.c   Tue Apr 19 09:29:54 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ip_output.c,v 1.249 2016/04/18 01:28:06 ozaki-r Exp $  */
+/*     $NetBSD: ip_output.c,v 1.250 2016/04/19 09:29:54 ozaki-r Exp $  */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -91,7 +91,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip_output.c,v 1.249 2016/04/18 01:28:06 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip_output.c,v 1.250 2016/04/19 09:29:54 ozaki-r Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -195,6 +195,37 @@
        return error;
 }
 
+static int
+ip_mark_mpls(struct ifnet * const ifp, struct mbuf * const m, struct rtentry *rt)
+{
+       int error = 0;
+#ifdef MPLS
+       union mpls_shim msh;
+
+       if (rt == NULL || rt_gettag(rt) == NULL ||
+           rt_gettag(rt)->sa_family != AF_MPLS ||
+           (m->m_flags & (M_MCAST | M_BCAST)) != 0 ||
+           ifp->if_type != IFT_ETHER)
+               return 0;
+
+       msh.s_addr = MPLS_GETSADDR(rt);
+       if (msh.shim.label != MPLS_LABEL_IMPLNULL) {
+               struct m_tag *mtag;
+               /*
+                * XXX tentative solution to tell ether_output
+                * it's MPLS. Need some more efficient solution.
+                */
+               mtag = m_tag_get(PACKET_TAG_MPLS,
+                   sizeof(int) /* dummy */,
+                   M_NOWAIT);
+               if (mtag == NULL)
+                       return ENOMEM;
+               m_tag_prepend(m, mtag);
+       }
+#endif
+       return error;
+}
+
 /*
  * Send an IP packet to a host.
  *
@@ -256,30 +287,9 @@
        }
 
 out:
-#ifdef MPLS
-       if (rt0 != NULL && rt_gettag(rt0) != NULL &&
-           rt_gettag(rt0)->sa_family == AF_MPLS &&
-           (m->m_flags & (M_MCAST | M_BCAST)) == 0 &&
-           ifp->if_type == IFT_ETHER) {
-               union mpls_shim msh;
-               msh.s_addr = MPLS_GETSADDR(rt0);
-               if (msh.shim.label != MPLS_LABEL_IMPLNULL) {
-                       struct m_tag *mtag;
-                       /*
-                        * XXX tentative solution to tell ether_output
-                        * it's MPLS. Need some more efficient solution.
-                        */
-                       mtag = m_tag_get(PACKET_TAG_MPLS,
-                           sizeof(int) /* dummy */,
-                           M_NOWAIT);
-                       if (mtag == NULL) {
-                               error = ENOMEM;
-                               goto bad;
-                       }
-                       m_tag_prepend(m, mtag);
-               }
-       }
-#endif
+       error = ip_mark_mpls(ifp, m, rt0);
+       if (error != 0)
+               return error;
 
        error = klock_if_output(ifp, m, dst, rt);
        goto exit;