[IPV6]: Fix sending extension headers before and including routing header.

Based on suggestion from Masahide Nakamura <nakam@linux-ipv6.org>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 6 insertions, 10 deletions

diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index bbbe80cdaf72..1cf02765fb5c 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -225,20 +225,16 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
                                          struct ip6_flowlabel * fl,
                                          struct ipv6_txoptions * fopt)
 {
-        struct ipv6_txoptions * fl_opt = fl ? fl->opt : NULL;
-
-        if (fopt == NULL || fopt->opt_flen == 0) {
-                if (!fl_opt || !fl_opt->dst0opt || fl_opt->srcrt)
-                        return fl_opt;
-        }
-
+        struct ipv6_txoptions * fl_opt = fl->opt;
+        
+        if (fopt == NULL || fopt->opt_flen == 0)
+                return fl_opt;
+        
         if (fl_opt != NULL) {
                 opt_space->hopopt = fl_opt->hopopt;
-                opt_space->dst0opt = fl_opt->srcrt ? fl_opt->dst0opt : NULL;
+                opt_space->dst0opt = fl_opt->dst0opt;
                 opt_space->srcrt = fl_opt->srcrt;
                 opt_space->opt_nflen = fl_opt->opt_nflen;
-                if (fl_opt->dst0opt && !fl_opt->srcrt)
-                        opt_space->opt_nflen -= ipv6_optlen(fl_opt->dst0opt);
         } else {
                 if (fopt->opt_nflen == 0)
                         return fopt;