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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2005-09-08 09:59:17 +0900
committerYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2005-09-08 09:59:17 +0900
commit333fad5364d6b457c8d837f7d05802d2aaf8a961 (patch)
tree92149276982a827457e9c556c7ef82ec3b09fb52 /net/ipv6/ip6_flowlabel.c
parent4706df3d3c42af802597d82c8b1542c3d52eab23 (diff)
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data: IPV6_RECVPKTINFO, IPV6_PKTINFO, IPV6_RECVHOPOPTS, IPV6_HOPOPTS, IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS, IPV6_RECVRTHDR, IPV6_RTHDR, IPV6_RECVHOPOPTS, IPV6_HOPOPTS Old semantics are preserved as IPV6_2292xxxx so that we can maintain backward compatibility. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'net/ipv6/ip6_flowlabel.c')
-rw-r--r--net/ipv6/ip6_flowlabel.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index b6c73da5ff3..2d5ce376c26 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -225,16 +225,20 @@ 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->opt;
+ struct ipv6_txoptions * fl_opt = fl ? fl->opt : NULL;
- if (fopt == NULL || fopt->opt_flen == 0)
- return fl_opt;
+ if (fopt == NULL || fopt->opt_flen == 0) {
+ if (!fl_opt || !fl_opt->dst0opt || fl_opt->srcrt)
+ return fl_opt;
+ }
if (fl_opt != NULL) {
opt_space->hopopt = fl_opt->hopopt;
- opt_space->dst0opt = fl_opt->dst0opt;
+ opt_space->dst0opt = fl_opt->srcrt ? fl_opt->dst0opt : NULL;
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;