[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>
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 76466af..dc1d991 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -210,39 +210,127 @@
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 @@
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 @@
return err;
}
- case IPV6_PKTOPTIONS:
+ case IPV6_2292PKTOPTIONS:
{
struct msghdr msg;
struct sk_buff *skb;
@@ -601,6 +700,16 @@
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 @@
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;
