[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>

7 files changed, 379 insertions, 41 deletions

diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 01468fab3d3d..832476bbc5cb 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -394,21 +394,85 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
                 u32 flowinfo = *(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK;
                 put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
         }
+
+        /* HbH is allowed only once */
         if (np->rxopt.bits.hopopts && opt->hop) {
                 u8 *ptr = skb->nh.raw + opt->hop;
                 put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr);
         }
-        if (np->rxopt.bits.dstopts && opt->dst0) {
+
+        if (opt->lastopt &&
+            (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) {
+                /*
+                 * Silly enough, but we need to reparse in order to
+                 * report extension headers (except for HbH)
+                 * in order.
+                 *
+                 * Also note that IPV6_RECVRTHDRDSTOPTS is NOT 
+                 * (and WILL NOT be) defined because
+                 * IPV6_RECVDSTOPTS is more generic. --yoshfuji
+                 */
+                unsigned int off = sizeof(struct ipv6hdr);
+                u8 nexthdr = skb->nh.ipv6h->nexthdr;
+
+                while (off <= opt->lastopt) {
+                        unsigned len;
+                        u8 *ptr = skb->nh.raw + off;
+
+                        switch(nexthdr) {
+                        case IPPROTO_DSTOPTS:
+                                nexthdr = ptr[0];
+                                len = (ptr[1] + 1) << 3;
+                                if (np->rxopt.bits.dstopts)
+                                        put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr);
+                                break;
+                        case IPPROTO_ROUTING:
+                                nexthdr = ptr[0];
+                                len = (ptr[1] + 1) << 3;
+                                if (np->rxopt.bits.srcrt)
+                                        put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr);
+                                break;
+                        case IPPROTO_AH:
+                                nexthdr = ptr[0];
+                                len = (ptr[1] + 1) << 2;
+                                break;
+                        default:
+                                nexthdr = ptr[0];
+                                len = (ptr[1] + 1) << 3;
+                                break;
+                        }
+
+                        off += len;
+                }
+        }
+
+        /* socket options in old style */
+        if (np->rxopt.bits.rxoinfo) {
+                struct in6_pktinfo src_info;
+
+                src_info.ipi6_ifindex = opt->iif;
+                ipv6_addr_copy(&src_info.ipi6_addr, &skb->nh.ipv6h->daddr);
+                put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
+        }
+        if (np->rxopt.bits.rxohlim) {
+                int hlim = skb->nh.ipv6h->hop_limit;
+                put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
+        }
+        if (np->rxopt.bits.ohopopts && opt->hop) {
+                u8 *ptr = skb->nh.raw + opt->hop;
+                put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr);
+        }
+        if (np->rxopt.bits.odstopts && opt->dst0) {
                 u8 *ptr = skb->nh.raw + opt->dst0;
-                put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, (ptr[1]+1)<<3, ptr);
+                put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr);
         }
-        if (np->rxopt.bits.srcrt && opt->srcrt) {
+        if (np->rxopt.bits.osrcrt && opt->srcrt) {
                 struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(skb->nh.raw + opt->srcrt);
-                put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, (rthdr->hdrlen+1) << 3, rthdr);
+                put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr);
         }
-        if (np->rxopt.bits.dstopts && opt->dst1) {
+        if (np->rxopt.bits.odstopts && opt->dst1) {
                 u8 *ptr = skb->nh.raw + opt->dst1;
-                put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, (ptr[1]+1)<<3, ptr);
+                put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr);
         }
         return 0;
 }
@@ -438,6 +502,7 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
 
                 switch (cmsg->cmsg_type) {
                 case IPV6_PKTINFO:
+                case IPV6_2292PKTINFO:
                         if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) {
                                 err = -EINVAL;
                                 goto exit_f;
@@ -492,6 +557,7 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
                         fl->fl6_flowlabel = IPV6_FLOWINFO_MASK & *(u32 *)CMSG_DATA(cmsg);
                         break;
 
+                case IPV6_2292HOPOPTS:
                 case IPV6_HOPOPTS:
                         if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
                                 err = -EINVAL;
@@ -512,7 +578,7 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
                         opt->hopopt = hdr;
                         break;
 
-                case IPV6_DSTOPTS:
+                case IPV6_2292DSTOPTS:
                         if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
                                 err = -EINVAL;
                                 goto exit_f;
@@ -536,6 +602,33 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
                         opt->dst1opt = hdr;
                         break;
 
+                case IPV6_DSTOPTS:
+                case IPV6_RTHDRDSTOPTS:
+                        if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
+                                err = -EINVAL;
+                                goto exit_f;
+                        }
+
+                        hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg);
+                        len = ((hdr->hdrlen + 1) << 3);
+                        if (cmsg->cmsg_len < CMSG_LEN(len)) {
+                                err = -EINVAL;
+                                goto exit_f;
+                        }
+                        if (!capable(CAP_NET_RAW)) {
+                                err = -EPERM;
+                                goto exit_f;
+                        }
+                        if (cmsg->cmsg_type == IPV6_DSTOPTS) {
+                                opt->opt_flen += len;
+                                opt->dst1opt = hdr;
+                        } else {
+                                opt->opt_nflen += len;
+                                opt->dst0opt = hdr;
+                        }
+                        break;
+
+                case IPV6_2292RTHDR:
                 case IPV6_RTHDR:
                         if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) {
                                 err = -EINVAL;
@@ -568,7 +661,7 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
                         opt->opt_nflen += len;
                         opt->srcrt = rthdr;
 
-                        if (opt->dst1opt) {
+                        if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) {
                                 int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3);
 
                                 opt->opt_nflen += dsthdrlen;
@@ -579,6 +672,7 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
 
                         break;
 
+                case IPV6_2292HOPLIMIT:
                 case IPV6_HOPLIMIT:
                         if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {
                                 err = -EINVAL;
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 5be6da2584ee..ffcda45e2c1e 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -164,6 +164,7 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp, unsigned int *nhoffp)
                 return -1;
         }
 
+        opt->lastopt = skb->h.raw - skb->nh.raw;
         opt->dst1 = skb->h.raw - skb->nh.raw;
 
         if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
@@ -243,6 +244,7 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp, unsigned int *nhoffp)
 
 looped_back:
         if (hdr->segments_left == 0) {
+                opt->lastopt = skb->h.raw - skb->nh.raw;
                 opt->srcrt = skb->h.raw - skb->nh.raw;
                 skb->h.raw += (hdr->hdrlen + 1) << 3;
                 opt->dst0 = opt->dst1;
@@ -539,10 +541,15 @@ void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
                           u8 *proto,
                           struct in6_addr **daddr)
 {
-        if (opt->srcrt)
+        if (opt->srcrt) {
                 ipv6_push_rthdr(skb, proto, opt->srcrt, daddr);
-        if (opt->dst0opt)
-                ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt);
+                /*
+                 * IPV6_RTHDRDSTOPTS is ignored
+                 * unless IPV6_RTHDR is set (RFC3542).
+                 */
+                if (opt->dst0opt)
+                        ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt);
+        }
         if (opt->hopopt)
                 ipv6_push_exthdr(skb, proto, NEXTHDR_HOP, opt->hopopt);
 }
@@ -573,3 +580,97 @@ ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt)
         }
         return opt2;
 }
+
+static int ipv6_renew_option(void *ohdr,
+                             struct ipv6_opt_hdr __user *newopt, int newoptlen,
+                             int inherit,
+                             struct ipv6_opt_hdr **hdr,
+                             char **p)
+{
+        if (inherit) {
+                if (ohdr) {
+                        memcpy(*p, ohdr, ipv6_optlen((struct ipv6_opt_hdr *)ohdr));
+                        *hdr = (struct ipv6_opt_hdr *)*p;
+                        *p += CMSG_ALIGN(ipv6_optlen(*(struct ipv6_opt_hdr **)hdr));
+                }
+        } else {
+                if (newopt) {
+                        if (copy_from_user(*p, newopt, newoptlen))
+                                return -EFAULT;
+                        *hdr = (struct ipv6_opt_hdr *)*p;
+                        if (ipv6_optlen(*(struct ipv6_opt_hdr **)hdr) > newoptlen)
+                                return -EINVAL;
+                        *p += CMSG_ALIGN(newoptlen);
+                }
+        }
+        return 0;
+}
+
+struct ipv6_txoptions *
+ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
+                   int newtype,
+                   struct ipv6_opt_hdr __user *newopt, int newoptlen)
+{
+        int tot_len = 0;
+        char *p;
+        struct ipv6_txoptions *opt2;
+        int err;
+
+        if (newtype != IPV6_HOPOPTS && opt->hopopt)
+                tot_len += CMSG_ALIGN(ipv6_optlen(opt->hopopt));
+        if (newtype != IPV6_RTHDRDSTOPTS && opt->dst0opt)
+                tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst0opt));
+        if (newtype != IPV6_RTHDR && opt->srcrt)
+                tot_len += CMSG_ALIGN(ipv6_optlen(opt->srcrt));
+        if (newtype != IPV6_DSTOPTS && opt->dst1opt)
+                tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst1opt));
+        if (newopt && newoptlen)
+                tot_len += CMSG_ALIGN(newoptlen);
+
+        if (!tot_len)
+                return NULL;
+
+        opt2 = sock_kmalloc(sk, tot_len, GFP_ATOMIC);
+        if (!opt2)
+                return ERR_PTR(-ENOBUFS);
+
+        memset(opt2, 0, tot_len);
+
+        opt2->tot_len = tot_len;
+        p = (char *)(opt2 + 1);
+
+        err = ipv6_renew_option(opt->hopopt, newopt, newoptlen,
+                                newtype != IPV6_HOPOPTS,
+                                &opt2->hopopt, &p);
+        if (err)
+                goto out;
+
+        err = ipv6_renew_option(opt->dst0opt, newopt, newoptlen,
+                                newtype != IPV6_RTHDRDSTOPTS,
+                                &opt2->dst0opt, &p);
+        if (err)
+                goto out;
+
+        err = ipv6_renew_option(opt->srcrt, newopt, newoptlen,
+                                newtype != IPV6_RTHDR,
+                                (struct ipv6_opt_hdr **)opt2->srcrt, &p);
+        if (err)
+                goto out;
+
+        err = ipv6_renew_option(opt->dst1opt, newopt, newoptlen,
+                                newtype != IPV6_DSTOPTS,
+                                &opt2->dst1opt, &p);
+        if (err)
+                goto out;
+
+        opt2->opt_nflen = (opt2->hopopt ? ipv6_optlen(opt2->hopopt) : 0) +
+                          (opt2->dst0opt ? ipv6_optlen(opt2->dst0opt) : 0) +
+                          (opt2->srcrt ? ipv6_optlen(opt2->srcrt) : 0);
+        opt2->opt_flen = (opt2->dst1opt ? ipv6_optlen(opt2->dst1opt) : 0);
+
+        return opt2;
+out:
+        sock_kfree_s(sk, p, tot_len);
+        return ERR_PTR(err);
+}
+
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index b6c73da5ff35..2d5ce376c265 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;
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 76466af8331e..dc1d9914bf7d 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -210,39 +210,127 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
                 retv = 0;
                 break;
 
-        case IPV6_PKTINFO:
+        case IPV6_RECVPKTINFO:
                 np->rxopt.bits.rxinfo = valbool;
                 retv = 0;
                 break;
+                
+        case IPV6_2292PKTINFO:
+                np->rxopt.bits.rxoinfo = valbool;
+                retv = 0;
+                break;
 
-        case IPV6_HOPLIMIT:
+        case IPV6_RECVHOPLIMIT:
                 np->rxopt.bits.rxhlim = valbool;
                 retv = 0;
                 break;
 
-        case IPV6_RTHDR:
+        case IPV6_2292HOPLIMIT:
+                np->rxopt.bits.rxohlim = valbool;
+                retv = 0;
+                break;
+
+        case IPV6_RECVRTHDR:
                 if (val < 0 || val > 2)
                         goto e_inval;
                 np->rxopt.bits.srcrt = val;
                 retv = 0;
                 break;
 
-        case IPV6_HOPOPTS:
+        case IPV6_2292RTHDR:
+                if (val < 0 || val > 2)
+                        goto e_inval;
+                np->rxopt.bits.osrcrt = val;
+                retv = 0;
+                break;
+
+        case IPV6_RECVHOPOPTS:
                 np->rxopt.bits.hopopts = valbool;
                 retv = 0;
                 break;
 
-        case IPV6_DSTOPTS:
+        case IPV6_2292HOPOPTS:
+                np->rxopt.bits.ohopopts = valbool;
+                retv = 0;
+                break;
+
+        case IPV6_RECVDSTOPTS:
                 np->rxopt.bits.dstopts = valbool;
                 retv = 0;
                 break;
 
+        case IPV6_2292DSTOPTS:
+                np->rxopt.bits.odstopts = valbool;
+                retv = 0;
+                break;
+
         case IPV6_FLOWINFO:
                 np->rxopt.bits.rxflow = valbool;
                 retv = 0;
                 break;
 
-        case IPV6_PKTOPTIONS:
+        case IPV6_HOPOPTS:
+        case IPV6_RTHDRDSTOPTS:
+        case IPV6_RTHDR:
+        case IPV6_DSTOPTS:
+        {
+                struct ipv6_txoptions *opt;
+                if (optlen == 0)
+                        optval = 0;
+
+                /* hop-by-hop / destination options are privileged option */
+                retv = -EPERM;
+                if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
+                        break;
+
+                retv = -EINVAL;
+                if (optlen & 0x7 || optlen > 8 * 255)
+                        break;
+
+                opt = ipv6_renew_options(sk, np->opt, optname,
+                                         (struct ipv6_opt_hdr __user *)optval,
+                                         optlen);
+                if (IS_ERR(opt)) {
+                        retv = PTR_ERR(opt);
+                        break;
+                }
+
+                /* routing header option needs extra check */
+                if (optname == IPV6_RTHDR && opt->srcrt) {
+                        struct ipv6_rt_hdr *rthdr = opt->srcrt;
+                        if (rthdr->type)
+                                goto sticky_done;
+                        if ((rthdr->hdrlen & 1) ||
+                            (rthdr->hdrlen >> 1) != rthdr->segments_left)
+                                goto sticky_done;
+                }
+
+                retv = 0;
+                if (sk->sk_type == SOCK_STREAM) {
+                        if (opt) {
+                                struct tcp_sock *tp = tcp_sk(sk);
+                                if (!((1 << sk->sk_state) &
+                                      (TCPF_LISTEN | TCPF_CLOSE))
+                                    && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
+                                        tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
+                                        tcp_sync_mss(sk, tp->pmtu_cookie);
+                                }
+                        }
+                        opt = xchg(&np->opt, opt);
+                        sk_dst_reset(sk);
+                } else {
+                        write_lock(&sk->sk_dst_lock);
+                        opt = xchg(&np->opt, opt);
+                        write_unlock(&sk->sk_dst_lock);
+                        sk_dst_reset(sk);
+                }
+sticky_done:
+                if (opt)
+                        sock_kfree_s(sk, opt, opt->tot_len);
+                break;
+        }
+
+        case IPV6_2292PKTOPTIONS:
         {
                 struct ipv6_txoptions *opt = NULL;
                 struct msghdr msg;
@@ -529,6 +617,17 @@ e_inval:
         return -EINVAL;
 }
 
+int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
+                           char __user *optval, int len)
+{
+        if (!hdr)
+                return 0;
+        len = min_t(int, len, ipv6_optlen(hdr));
+        if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
+                return -EFAULT;
+        return len;
+}
+
 int ipv6_getsockopt(struct sock *sk, int level, int optname,
                     char __user *optval, int __user *optlen)
 {
@@ -567,7 +666,7 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
                 return err;
         }
 
-        case IPV6_PKTOPTIONS:
+        case IPV6_2292PKTOPTIONS:
         {
                 struct msghdr msg;
                 struct sk_buff *skb;
@@ -601,6 +700,16 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
                                 int hlim = np->mcast_hops;
                                 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
                         }
+                        if (np->rxopt.bits.rxoinfo) {
+                                struct in6_pktinfo src_info;
+                                src_info.ipi6_ifindex = np->mcast_oif;
+                                ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
+                                put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
+                        }
+                        if (np->rxopt.bits.rxohlim) {
+                                int hlim = np->mcast_hops;
+                                put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
+                        }
                 }
                 len -= msg.msg_controllen;
                 return put_user(len, optlen);
@@ -625,26 +734,59 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
                 val = np->ipv6only;
                 break;
 
-        case IPV6_PKTINFO:
+        case IPV6_RECVPKTINFO:
                 val = np->rxopt.bits.rxinfo;
                 break;
 
-        case IPV6_HOPLIMIT:
+        case IPV6_2292PKTINFO:
+                val = np->rxopt.bits.rxoinfo;
+                break;
+
+        case IPV6_RECVHOPLIMIT:
                 val = np->rxopt.bits.rxhlim;
                 break;
 
-        case IPV6_RTHDR:
+        case IPV6_2292HOPLIMIT:
+                val = np->rxopt.bits.rxohlim;
+                break;
+
+        case IPV6_RECVRTHDR:
                 val = np->rxopt.bits.srcrt;
                 break;
 
+        case IPV6_2292RTHDR:
+                val = np->rxopt.bits.osrcrt;
+                break;
+
         case IPV6_HOPOPTS:
+        case IPV6_RTHDRDSTOPTS:
+        case IPV6_RTHDR:
+        case IPV6_DSTOPTS:
+        {
+
+                lock_sock(sk);
+                len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
+                                             optval, len);
+                release_sock(sk);
+                return put_user(len, optlen);
+        }
+
+        case IPV6_RECVHOPOPTS:
                 val = np->rxopt.bits.hopopts;
                 break;
 
-        case IPV6_DSTOPTS:
+        case IPV6_2292HOPOPTS:
+                val = np->rxopt.bits.ohopopts;
+                break;
+
+        case IPV6_RECVDSTOPTS:
                 val = np->rxopt.bits.dstopts;
                 break;
 
+        case IPV6_2292DSTOPTS:
+                val = np->rxopt.bits.odstopts;
+                break;
+
         case IPV6_FLOWINFO:
                 val = np->rxopt.bits.rxflow;
                 break;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index ed3a76b30fd9..e527a1652d7c 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -755,8 +755,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
         }
         if (opt == NULL)
                 opt = np->opt;
-        if (flowlabel)
-                opt = fl6_merge_options(&opt_space, flowlabel, opt);
+        opt = fl6_merge_options(&opt_space, flowlabel, opt);
 
         fl.proto = proto;
         rawv6_probe_proto_opt(&fl, msg);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 794734f1d230..246414b27d0e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -849,7 +849,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
         if (dst == NULL) {
                 opt = np->opt;
                 if (opt == NULL &&
-                    np->rxopt.bits.srcrt == 2 &&
+                    np->rxopt.bits.osrcrt == 2 &&
                     treq->pktopts) {
                         struct sk_buff *pktopts = treq->pktopts;
                         struct inet6_skb_parm *rxopt = IP6CB(pktopts);
@@ -915,11 +915,10 @@ static int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
         struct inet6_skb_parm *opt = IP6CB(skb);
 
         if (np->rxopt.all) {
-                if ((opt->hop && np->rxopt.bits.hopopts) ||
-                    ((IPV6_FLOWINFO_MASK&*(u32*)skb->nh.raw) &&
-                     np->rxopt.bits.rxflow) ||
-                    (opt->srcrt && np->rxopt.bits.srcrt) ||
-                    ((opt->dst1 || opt->dst0) && np->rxopt.bits.dstopts))
+                if ((opt->hop && (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
+                    ((IPV6_FLOWINFO_MASK & *(u32*)skb->nh.raw) && np->rxopt.bits.rxflow) ||
+                    (opt->srcrt && (np->rxopt.bits.srcrt || np->rxopt.bits.osrcrt)) ||
+                    ((opt->dst1 || opt->dst0) && (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
                         return 1;
         }
         return 0;
@@ -1190,8 +1189,8 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
         TCP_ECN_create_request(req, skb->h.th);
         treq->pktopts = NULL;
         if (ipv6_opt_accepted(sk, skb) ||
-            np->rxopt.bits.rxinfo ||
-            np->rxopt.bits.rxhlim) {
+            np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
+            np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
                 atomic_inc(&skb->users);
                 treq->pktopts = skb;
         }
@@ -1288,7 +1287,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
         if (sk_acceptq_is_full(sk))
                 goto out_overflow;
 
-        if (np->rxopt.bits.srcrt == 2 &&
+        if (np->rxopt.bits.osrcrt == 2 &&
             opt == NULL && treq->pktopts) {
                 struct inet6_skb_parm *rxopt = IP6CB(treq->pktopts);
                 if (rxopt->srcrt)
@@ -1544,9 +1543,9 @@ ipv6_pktoptions:
         tp = tcp_sk(sk);
         if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt &&
             !((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
-                if (np->rxopt.bits.rxinfo)
+                if (np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo)
                         np->mcast_oif = inet6_iif(opt_skb);
-                if (np->rxopt.bits.rxhlim)
+                if (np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim)
                         np->mcast_hops = opt_skb->nh.ipv6h->hop_limit;
                 if (ipv6_opt_accepted(sk, opt_skb)) {
                         skb_set_owner_r(opt_skb, sk);
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 390d750449ce..aa6eaf3f18a6 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -773,8 +773,7 @@ do_udp_sendmsg:
         }
         if (opt == NULL)
                 opt = np->opt;
-        if (flowlabel)
-                opt = fl6_merge_options(&opt_space, flowlabel, opt);
+        opt = fl6_merge_options(&opt_space, flowlabel, opt);
 
         fl->proto = IPPROTO_UDP;
         ipv6_addr_copy(&fl->fl6_dst, daddr);