@@ -278,6 +278,7 @@ struct ipv6_pinfo {
struct in6_addr saddr;
struct in6_addr rcv_saddr;
struct in6_addr daddr;
+ struct in6_pktinfo sticky_pktinfo;
struct in6_addr *daddr_cache;
#ifdef CONFIG_IPV6_SUBTREES
struct in6_addr *saddr_cache;
@@ -395,6 +395,28 @@ sticky_done:
break;
}
+ case IPV6_PKTINFO:
+ {
+ struct in6_pktinfo pkt;
+
+ if (optlen == 0)
+ goto e_inval;
+ else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
+ goto e_inval;
+
+ if (copy_from_user(&pkt, optval, optlen)) {
+ retv = -EFAULT;
+ break;
+ }
+ if(sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
+ goto e_inval;
+
+ np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
+ ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr);
+ retv = 0;
+ break;
+ }
+
case IPV6_2292PKTOPTIONS:
{
struct ipv6_txoptions *opt = NULL;
There are three reasons for me to add this support: 1.When no interface is specified in an IPV6_PKTINFO ancillary data item, the interface specified in an IPV6_PKTINFO sticky optionis is used. RFC3542: 6.7. Summary of Outgoing Interface Selection This document and [RFC-3493] specify various methods that affect the selection of the packet's outgoing interface. This subsection summarizes the ordering among those in order to ensure deterministic behavior. For a given outgoing packet on a given socket, the outgoing interface is determined in the following order: 1. if an interface is specified in an IPV6_PKTINFO ancillary data item, the interface is used. 2. otherwise, if an interface is specified in an IPV6_PKTINFO sticky option, the interface is used. 2.When no IPV6_PKTINFO ancillary data is received,getsockopt() should return the sticky option value which set with setsockopt(). RFC 3542: Issuing getsockopt() for the above options will return the sticky option value i.e., the value set with setsockopt(). If no sticky option value has been set getsockopt() will return the following values: 3.Make the setsockopt implementation POSIX compliant. Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> --- include/linux/ipv6.h | 1 + net/ipv6/ipv6_sockglue.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+), 0 deletions(-)