[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/net/ipv6/ipv6_sockglue.c b/src/kernel/linux/v4.14/net/ipv6/ipv6_sockglue.c
new file mode 100644
index 0000000..3f44316
--- /dev/null
+++ b/src/kernel/linux/v4.14/net/ipv6/ipv6_sockglue.c
@@ -0,0 +1,1424 @@
+/*
+ * IPv6 BSD socket options interface
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ *
+ * Based on linux/net/ipv4/ip_sockglue.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * FIXME: Make the setsockopt code POSIX compliant: That is
+ *
+ * o Truncate getsockopt returns
+ * o Return an optlen of the truncated length if need be
+ *
+ * Changes:
+ * David L Stevens <dlstevens@us.ibm.com>:
+ * - added multicast source filtering API for MLDv2
+ */
+
+#include <linux/module.h>
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/mroute6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/sysctl.h>
+#include <linux/netfilter.h>
+#include <linux/slab.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/inet_common.h>
+#include <net/tcp.h>
+#include <net/udp.h>
+#include <net/udplite.h>
+#include <net/xfrm.h>
+#include <net/compat.h>
+#include <net/seg6.h>
+
+#include <linux/uaccess.h>
+
+struct ip6_ra_chain *ip6_ra_chain;
+DEFINE_RWLOCK(ip6_ra_lock);
+
+int ip6_ra_control(struct sock *sk, int sel)
+{
+ struct ip6_ra_chain *ra, *new_ra, **rap;
+
+ /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
+ if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
+ return -ENOPROTOOPT;
+
+ new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
+
+ write_lock_bh(&ip6_ra_lock);
+ for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) {
+ if (ra->sk == sk) {
+ if (sel >= 0) {
+ write_unlock_bh(&ip6_ra_lock);
+ kfree(new_ra);
+ return -EADDRINUSE;
+ }
+
+ *rap = ra->next;
+ write_unlock_bh(&ip6_ra_lock);
+
+ sock_put(sk);
+ kfree(ra);
+ return 0;
+ }
+ }
+ if (!new_ra) {
+ write_unlock_bh(&ip6_ra_lock);
+ return -ENOBUFS;
+ }
+ new_ra->sk = sk;
+ new_ra->sel = sel;
+ new_ra->next = ra;
+ *rap = new_ra;
+ sock_hold(sk);
+ write_unlock_bh(&ip6_ra_lock);
+ return 0;
+}
+
+struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
+ struct ipv6_txoptions *opt)
+{
+ if (inet_sk(sk)->is_icsk) {
+ if (opt &&
+ !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
+ inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
+ icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
+ }
+ }
+ opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt,
+ opt);
+ sk_dst_reset(sk);
+
+ return opt;
+}
+
+static bool setsockopt_needs_rtnl(int optname)
+{
+ switch (optname) {
+ case IPV6_ADDRFORM:
+ case IPV6_ADD_MEMBERSHIP:
+ case IPV6_DROP_MEMBERSHIP:
+ case IPV6_JOIN_ANYCAST:
+ case IPV6_LEAVE_ANYCAST:
+ case MCAST_JOIN_GROUP:
+ case MCAST_LEAVE_GROUP:
+ case MCAST_JOIN_SOURCE_GROUP:
+ case MCAST_LEAVE_SOURCE_GROUP:
+ case MCAST_BLOCK_SOURCE:
+ case MCAST_UNBLOCK_SOURCE:
+ case MCAST_MSFILTER:
+ return true;
+ }
+ return false;
+}
+
+static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct net *net = sock_net(sk);
+ int val, valbool;
+ int retv = -ENOPROTOOPT;
+ bool needs_rtnl = setsockopt_needs_rtnl(optname);
+
+ if (!optval)
+ val = 0;
+ else {
+ if (optlen >= sizeof(int)) {
+ if (get_user(val, (int __user *) optval))
+ return -EFAULT;
+ } else
+ val = 0;
+ }
+
+ valbool = (val != 0);
+
+ if (ip6_mroute_opt(optname))
+ return ip6_mroute_setsockopt(sk, optname, optval, optlen);
+
+ if (needs_rtnl)
+ rtnl_lock();
+ lock_sock(sk);
+
+ switch (optname) {
+
+ case IPV6_ADDRFORM:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val == PF_INET) {
+ struct ipv6_txoptions *opt;
+ struct sk_buff *pktopt;
+
+ if (sk->sk_type == SOCK_RAW)
+ break;
+
+ if (sk->sk_protocol == IPPROTO_UDP ||
+ sk->sk_protocol == IPPROTO_UDPLITE) {
+ struct udp_sock *up = udp_sk(sk);
+ if (up->pending == AF_INET6) {
+ retv = -EBUSY;
+ break;
+ }
+ } else if (sk->sk_protocol == IPPROTO_TCP) {
+ if (sk->sk_prot != &tcpv6_prot) {
+ retv = -EBUSY;
+ break;
+ }
+ } else {
+ break;
+ }
+
+ if (sk->sk_state != TCP_ESTABLISHED) {
+ retv = -ENOTCONN;
+ break;
+ }
+
+ if (ipv6_only_sock(sk) ||
+ !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {
+ retv = -EADDRNOTAVAIL;
+ break;
+ }
+
+ fl6_free_socklist(sk);
+ __ipv6_sock_mc_close(sk);
+ __ipv6_sock_ac_close(sk);
+
+ /*
+ * Sock is moving from IPv6 to IPv4 (sk_prot), so
+ * remove it from the refcnt debug socks count in the
+ * original family...
+ */
+ sk_refcnt_debug_dec(sk);
+
+ if (sk->sk_protocol == IPPROTO_TCP) {
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ local_bh_disable();
+ sock_prot_inuse_add(net, sk->sk_prot, -1);
+ sock_prot_inuse_add(net, &tcp_prot, 1);
+ local_bh_enable();
+ sk->sk_prot = &tcp_prot;
+ icsk->icsk_af_ops = &ipv4_specific;
+ sk->sk_socket->ops = &inet_stream_ops;
+ sk->sk_family = PF_INET;
+ tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
+ } else {
+ struct proto *prot = &udp_prot;
+
+ if (sk->sk_protocol == IPPROTO_UDPLITE)
+ prot = &udplite_prot;
+ local_bh_disable();
+ sock_prot_inuse_add(net, sk->sk_prot, -1);
+ sock_prot_inuse_add(net, prot, 1);
+ local_bh_enable();
+ sk->sk_prot = prot;
+ sk->sk_socket->ops = &inet_dgram_ops;
+ sk->sk_family = PF_INET;
+ }
+ opt = xchg((__force struct ipv6_txoptions **)&np->opt,
+ NULL);
+ if (opt) {
+ atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
+ txopt_put(opt);
+ }
+ pktopt = xchg(&np->pktoptions, NULL);
+ kfree_skb(pktopt);
+
+ /*
+ * ... and add it to the refcnt debug socks count
+ * in the new family. -acme
+ */
+ sk_refcnt_debug_inc(sk);
+ module_put(THIS_MODULE);
+ retv = 0;
+ break;
+ }
+ goto e_inval;
+
+ case IPV6_V6ONLY:
+ if (optlen < sizeof(int) ||
+ inet_sk(sk)->inet_num)
+ goto e_inval;
+ sk->sk_ipv6only = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVPKTINFO:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxinfo = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_2292PKTINFO:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxoinfo = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVHOPLIMIT:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxhlim = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_2292HOPLIMIT:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxohlim = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVRTHDR:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.srcrt = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_2292RTHDR:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.osrcrt = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVHOPOPTS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.hopopts = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_2292HOPOPTS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.ohopopts = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVDSTOPTS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.dstopts = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_2292DSTOPTS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.odstopts = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_TCLASS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val < -1 || val > 0xff)
+ goto e_inval;
+ /* RFC 3542, 6.5: default traffic class of 0x0 */
+ if (val == -1)
+ val = 0;
+ np->tclass = val;
+ retv = 0;
+ break;
+
+ case IPV6_RECVTCLASS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxtclass = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_FLOWINFO:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxflow = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVPATHMTU:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxpmtu = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_TRANSPARENT:
+ if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) &&
+ !ns_capable(net->user_ns, CAP_NET_RAW)) {
+ retv = -EPERM;
+ break;
+ }
+ if (optlen < sizeof(int))
+ goto e_inval;
+ /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
+ inet_sk(sk)->transparent = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVORIGDSTADDR:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxorigdstaddr = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_HOPOPTS:
+ case IPV6_RTHDRDSTOPTS:
+ case IPV6_RTHDR:
+ case IPV6_DSTOPTS:
+ {
+ struct ipv6_txoptions *opt;
+ struct ipv6_opt_hdr *new = NULL;
+
+ /* hop-by-hop / destination options are privileged option */
+ retv = -EPERM;
+ if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
+ break;
+
+ /* remove any sticky options header with a zero option
+ * length, per RFC3542.
+ */
+ if (optlen == 0)
+ optval = NULL;
+ else if (!optval)
+ goto e_inval;
+ else if (optlen < sizeof(struct ipv6_opt_hdr) ||
+ optlen & 0x7 || optlen > 8 * 255)
+ goto e_inval;
+ else {
+ new = memdup_user(optval, optlen);
+ if (IS_ERR(new)) {
+ retv = PTR_ERR(new);
+ break;
+ }
+ if (unlikely(ipv6_optlen(new) > optlen)) {
+ kfree(new);
+ goto e_inval;
+ }
+ }
+
+ opt = rcu_dereference_protected(np->opt,
+ lockdep_sock_is_held(sk));
+ opt = ipv6_renew_options(sk, opt, optname, new);
+ kfree(new);
+ if (IS_ERR(opt)) {
+ retv = PTR_ERR(opt);
+ break;
+ }
+
+ /* routing header option needs extra check */
+ retv = -EINVAL;
+ if (optname == IPV6_RTHDR && opt && opt->srcrt) {
+ struct ipv6_rt_hdr *rthdr = opt->srcrt;
+ switch (rthdr->type) {
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
+ case IPV6_SRCRT_TYPE_2:
+ if (rthdr->hdrlen != 2 ||
+ rthdr->segments_left != 1)
+ goto sticky_done;
+
+ break;
+#endif
+ case IPV6_SRCRT_TYPE_4:
+ {
+ struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *)
+ opt->srcrt;
+
+ if (!seg6_validate_srh(srh, optlen))
+ goto sticky_done;
+ break;
+ }
+ default:
+ goto sticky_done;
+ }
+ }
+
+ retv = 0;
+ opt = ipv6_update_options(sk, opt);
+sticky_done:
+ if (opt) {
+ atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
+ txopt_put(opt);
+ }
+ break;
+ }
+
+ case IPV6_PKTINFO:
+ {
+ struct in6_pktinfo pkt;
+
+ if (optlen == 0)
+ goto e_inval;
+ else if (optlen < sizeof(struct in6_pktinfo) || !optval)
+ goto e_inval;
+
+ if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
+ 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;
+ np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr;
+ retv = 0;
+ break;
+ }
+
+ case IPV6_2292PKTOPTIONS:
+ {
+ struct ipv6_txoptions *opt = NULL;
+ struct msghdr msg;
+ struct flowi6 fl6;
+ struct sockcm_cookie sockc_junk;
+ struct ipcm6_cookie ipc6;
+
+ memset(&fl6, 0, sizeof(fl6));
+ fl6.flowi6_oif = sk->sk_bound_dev_if;
+ fl6.flowi6_mark = sk->sk_mark;
+
+ if (optlen == 0)
+ goto update;
+
+ /* 1K is probably excessive
+ * 1K is surely not enough, 2K per standard header is 16K.
+ */
+ retv = -EINVAL;
+ if (optlen > 64*1024)
+ break;
+
+ opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
+ retv = -ENOBUFS;
+ if (!opt)
+ break;
+
+ memset(opt, 0, sizeof(*opt));
+ refcount_set(&opt->refcnt, 1);
+ opt->tot_len = sizeof(*opt) + optlen;
+ retv = -EFAULT;
+ if (copy_from_user(opt+1, optval, optlen))
+ goto done;
+
+ msg.msg_controllen = optlen;
+ msg.msg_control = (void *)(opt+1);
+ ipc6.opt = opt;
+
+ retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk);
+ if (retv)
+ goto done;
+update:
+ retv = 0;
+ opt = ipv6_update_options(sk, opt);
+done:
+ if (opt) {
+ atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
+ txopt_put(opt);
+ }
+ break;
+ }
+ case IPV6_UNICAST_HOPS:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val > 255 || val < -1)
+ goto e_inval;
+ np->hop_limit = val;
+ retv = 0;
+ break;
+
+ case IPV6_MULTICAST_HOPS:
+ if (sk->sk_type == SOCK_STREAM)
+ break;
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val > 255 || val < -1)
+ goto e_inval;
+ np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val);
+ retv = 0;
+ break;
+
+ case IPV6_MULTICAST_LOOP:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val != valbool)
+ goto e_inval;
+ np->mc_loop = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_UNICAST_IF:
+ {
+ struct net_device *dev = NULL;
+ int ifindex;
+
+ if (optlen != sizeof(int))
+ goto e_inval;
+
+ ifindex = (__force int)ntohl((__force __be32)val);
+ if (ifindex == 0) {
+ np->ucast_oif = 0;
+ retv = 0;
+ break;
+ }
+
+ dev = dev_get_by_index(net, ifindex);
+ retv = -EADDRNOTAVAIL;
+ if (!dev)
+ break;
+ dev_put(dev);
+
+ retv = -EINVAL;
+ if (sk->sk_bound_dev_if)
+ break;
+
+ np->ucast_oif = ifindex;
+ retv = 0;
+ break;
+ }
+
+ case IPV6_MULTICAST_IF:
+ if (sk->sk_type == SOCK_STREAM)
+ break;
+ if (optlen < sizeof(int))
+ goto e_inval;
+
+ if (val) {
+ struct net_device *dev;
+ int midx;
+
+ rcu_read_lock();
+
+ dev = dev_get_by_index_rcu(net, val);
+ if (!dev) {
+ rcu_read_unlock();
+ retv = -ENODEV;
+ break;
+ }
+ midx = l3mdev_master_ifindex_rcu(dev);
+
+ rcu_read_unlock();
+
+ if (sk->sk_bound_dev_if &&
+ sk->sk_bound_dev_if != val &&
+ (!midx || midx != sk->sk_bound_dev_if))
+ goto e_inval;
+ }
+ np->mcast_oif = val;
+ retv = 0;
+ break;
+ case IPV6_ADD_MEMBERSHIP:
+ case IPV6_DROP_MEMBERSHIP:
+ {
+ struct ipv6_mreq mreq;
+
+ if (optlen < sizeof(struct ipv6_mreq))
+ goto e_inval;
+
+ retv = -EPROTO;
+ if (inet_sk(sk)->is_icsk)
+ break;
+
+ retv = -EFAULT;
+ if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
+ break;
+
+ if (optname == IPV6_ADD_MEMBERSHIP)
+ retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
+ else
+ retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
+ break;
+ }
+ case IPV6_JOIN_ANYCAST:
+ case IPV6_LEAVE_ANYCAST:
+ {
+ struct ipv6_mreq mreq;
+
+ if (optlen < sizeof(struct ipv6_mreq))
+ goto e_inval;
+
+ retv = -EFAULT;
+ if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
+ break;
+
+ if (optname == IPV6_JOIN_ANYCAST)
+ retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
+ else
+ retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
+ break;
+ }
+ case MCAST_JOIN_GROUP:
+ case MCAST_LEAVE_GROUP:
+ {
+ struct group_req greq;
+ struct sockaddr_in6 *psin6;
+
+ if (optlen < sizeof(struct group_req))
+ goto e_inval;
+
+ retv = -EFAULT;
+ if (copy_from_user(&greq, optval, sizeof(struct group_req)))
+ break;
+ if (greq.gr_group.ss_family != AF_INET6) {
+ retv = -EADDRNOTAVAIL;
+ break;
+ }
+ psin6 = (struct sockaddr_in6 *)&greq.gr_group;
+ if (optname == MCAST_JOIN_GROUP)
+ retv = ipv6_sock_mc_join(sk, greq.gr_interface,
+ &psin6->sin6_addr);
+ else
+ retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
+ &psin6->sin6_addr);
+ break;
+ }
+ case MCAST_JOIN_SOURCE_GROUP:
+ case MCAST_LEAVE_SOURCE_GROUP:
+ case MCAST_BLOCK_SOURCE:
+ case MCAST_UNBLOCK_SOURCE:
+ {
+ struct group_source_req greqs;
+ int omode, add;
+
+ if (optlen < sizeof(struct group_source_req))
+ goto e_inval;
+ if (copy_from_user(&greqs, optval, sizeof(greqs))) {
+ retv = -EFAULT;
+ break;
+ }
+ if (greqs.gsr_group.ss_family != AF_INET6 ||
+ greqs.gsr_source.ss_family != AF_INET6) {
+ retv = -EADDRNOTAVAIL;
+ break;
+ }
+ if (optname == MCAST_BLOCK_SOURCE) {
+ omode = MCAST_EXCLUDE;
+ add = 1;
+ } else if (optname == MCAST_UNBLOCK_SOURCE) {
+ omode = MCAST_EXCLUDE;
+ add = 0;
+ } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
+ struct sockaddr_in6 *psin6;
+
+ psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
+ retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
+ &psin6->sin6_addr);
+ /* prior join w/ different source is ok */
+ if (retv && retv != -EADDRINUSE)
+ break;
+ omode = MCAST_INCLUDE;
+ add = 1;
+ } else /* MCAST_LEAVE_SOURCE_GROUP */ {
+ omode = MCAST_INCLUDE;
+ add = 0;
+ }
+ retv = ip6_mc_source(add, omode, sk, &greqs);
+ break;
+ }
+ case MCAST_MSFILTER:
+ {
+ struct group_filter *gsf;
+
+ if (optlen < GROUP_FILTER_SIZE(0))
+ goto e_inval;
+ if (optlen > sysctl_optmem_max) {
+ retv = -ENOBUFS;
+ break;
+ }
+ gsf = memdup_user(optval, optlen);
+ if (IS_ERR(gsf)) {
+ retv = PTR_ERR(gsf);
+ break;
+ }
+ /* numsrc >= (4G-140)/128 overflow in 32 bits */
+ if (gsf->gf_numsrc >= 0x1ffffffU ||
+ gsf->gf_numsrc > sysctl_mld_max_msf) {
+ kfree(gsf);
+ retv = -ENOBUFS;
+ break;
+ }
+ if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
+ kfree(gsf);
+ retv = -EINVAL;
+ break;
+ }
+ retv = ip6_mc_msfilter(sk, gsf);
+ kfree(gsf);
+
+ break;
+ }
+ case IPV6_ROUTER_ALERT:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ retv = ip6_ra_control(sk, val);
+ break;
+ case IPV6_MTU_DISCOVER:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT)
+ goto e_inval;
+ np->pmtudisc = val;
+ retv = 0;
+ break;
+ case IPV6_MTU:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val && val < IPV6_MIN_MTU)
+ goto e_inval;
+ np->frag_size = val;
+ retv = 0;
+ break;
+ case IPV6_RECVERR:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->recverr = valbool;
+ if (!val)
+ skb_queue_purge(&sk->sk_error_queue);
+ retv = 0;
+ break;
+ case IPV6_FLOWINFO_SEND:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->sndflow = valbool;
+ retv = 0;
+ break;
+ case IPV6_FLOWLABEL_MGR:
+ retv = ipv6_flowlabel_opt(sk, optval, optlen);
+ break;
+ case IPV6_IPSEC_POLICY:
+ case IPV6_XFRM_POLICY:
+ retv = -EPERM;
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+ break;
+ retv = xfrm_user_policy(sk, optname, optval, optlen);
+ break;
+
+ case IPV6_ADDR_PREFERENCES:
+ {
+ unsigned int pref = 0;
+ unsigned int prefmask = ~0;
+
+ if (optlen < sizeof(int))
+ goto e_inval;
+
+ retv = -EINVAL;
+
+ /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
+ switch (val & (IPV6_PREFER_SRC_PUBLIC|
+ IPV6_PREFER_SRC_TMP|
+ IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
+ case IPV6_PREFER_SRC_PUBLIC:
+ pref |= IPV6_PREFER_SRC_PUBLIC;
+ break;
+ case IPV6_PREFER_SRC_TMP:
+ pref |= IPV6_PREFER_SRC_TMP;
+ break;
+ case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
+ break;
+ case 0:
+ goto pref_skip_pubtmp;
+ default:
+ goto e_inval;
+ }
+
+ prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
+ IPV6_PREFER_SRC_TMP);
+pref_skip_pubtmp:
+
+ /* check HOME/COA conflicts */
+ switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
+ case IPV6_PREFER_SRC_HOME:
+ break;
+ case IPV6_PREFER_SRC_COA:
+ pref |= IPV6_PREFER_SRC_COA;
+ case 0:
+ goto pref_skip_coa;
+ default:
+ goto e_inval;
+ }
+
+ prefmask &= ~IPV6_PREFER_SRC_COA;
+pref_skip_coa:
+
+ /* check CGA/NONCGA conflicts */
+ switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
+ case IPV6_PREFER_SRC_CGA:
+ case IPV6_PREFER_SRC_NONCGA:
+ case 0:
+ break;
+ default:
+ goto e_inval;
+ }
+
+ np->srcprefs = (np->srcprefs & prefmask) | pref;
+ retv = 0;
+
+ break;
+ }
+ case IPV6_MINHOPCOUNT:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val < 0 || val > 255)
+ goto e_inval;
+ np->min_hopcount = val;
+ retv = 0;
+ break;
+ case IPV6_DONTFRAG:
+ np->dontfrag = valbool;
+ retv = 0;
+ break;
+ case IPV6_AUTOFLOWLABEL:
+ np->autoflowlabel = valbool;
+ np->autoflowlabel_set = 1;
+ retv = 0;
+ break;
+ case IPV6_RECVFRAGSIZE:
+ np->rxopt.bits.recvfragsize = valbool;
+ retv = 0;
+ break;
+ }
+
+ release_sock(sk);
+ if (needs_rtnl)
+ rtnl_unlock();
+
+ return retv;
+
+e_inval:
+ release_sock(sk);
+ if (needs_rtnl)
+ rtnl_unlock();
+ return -EINVAL;
+}
+
+int ipv6_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ int err;
+
+ if (level == SOL_IP && sk->sk_type != SOCK_RAW)
+ return udp_prot.setsockopt(sk, level, optname, optval, optlen);
+
+ if (level != SOL_IPV6)
+ return -ENOPROTOOPT;
+
+ err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
+#ifdef CONFIG_NETFILTER
+ /* we need to exclude all possible ENOPROTOOPTs except default case */
+ if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
+ optname != IPV6_XFRM_POLICY)
+ err = nf_setsockopt(sk, PF_INET6, optname, optval, optlen);
+#endif
+ return err;
+}
+EXPORT_SYMBOL(ipv6_setsockopt);
+
+#ifdef CONFIG_COMPAT
+int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ int err;
+
+ if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
+ if (udp_prot.compat_setsockopt != NULL)
+ return udp_prot.compat_setsockopt(sk, level, optname,
+ optval, optlen);
+ return udp_prot.setsockopt(sk, level, optname, optval, optlen);
+ }
+
+ if (level != SOL_IPV6)
+ return -ENOPROTOOPT;
+
+ if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
+ return compat_mc_setsockopt(sk, level, optname, optval, optlen,
+ ipv6_setsockopt);
+
+ err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
+#ifdef CONFIG_NETFILTER
+ /* we need to exclude all possible ENOPROTOOPTs except default case */
+ if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
+ optname != IPV6_XFRM_POLICY)
+ err = compat_nf_setsockopt(sk, PF_INET6, optname, optval,
+ optlen);
+#endif
+ return err;
+}
+EXPORT_SYMBOL(compat_ipv6_setsockopt);
+#endif
+
+static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
+ int optname, char __user *optval, int len)
+{
+ struct ipv6_opt_hdr *hdr;
+
+ if (!opt)
+ return 0;
+
+ switch (optname) {
+ case IPV6_HOPOPTS:
+ hdr = opt->hopopt;
+ break;
+ case IPV6_RTHDRDSTOPTS:
+ hdr = opt->dst0opt;
+ break;
+ case IPV6_RTHDR:
+ hdr = (struct ipv6_opt_hdr *)opt->srcrt;
+ break;
+ case IPV6_DSTOPTS:
+ hdr = opt->dst1opt;
+ break;
+ default:
+ return -EINVAL; /* should not happen */
+ }
+
+ if (!hdr)
+ return 0;
+
+ len = min_t(unsigned int, len, ipv6_optlen(hdr));
+ if (copy_to_user(optval, hdr, len))
+ return -EFAULT;
+ return len;
+}
+
+static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen, unsigned int flags)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ int len;
+ int val;
+
+ if (ip6_mroute_opt(optname))
+ return ip6_mroute_getsockopt(sk, optname, optval, optlen);
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+ switch (optname) {
+ case IPV6_ADDRFORM:
+ if (sk->sk_protocol != IPPROTO_UDP &&
+ sk->sk_protocol != IPPROTO_UDPLITE &&
+ sk->sk_protocol != IPPROTO_TCP)
+ return -ENOPROTOOPT;
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -ENOTCONN;
+ val = sk->sk_family;
+ break;
+ case MCAST_MSFILTER:
+ {
+ struct group_filter gsf;
+ int err;
+
+ if (len < GROUP_FILTER_SIZE(0))
+ return -EINVAL;
+ if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
+ return -EFAULT;
+ if (gsf.gf_group.ss_family != AF_INET6)
+ return -EADDRNOTAVAIL;
+ lock_sock(sk);
+ err = ip6_mc_msfget(sk, &gsf,
+ (struct group_filter __user *)optval, optlen);
+ release_sock(sk);
+ return err;
+ }
+
+ case IPV6_2292PKTOPTIONS:
+ {
+ struct msghdr msg;
+ struct sk_buff *skb;
+
+ if (sk->sk_type != SOCK_STREAM)
+ return -ENOPROTOOPT;
+
+ msg.msg_control = optval;
+ msg.msg_controllen = len;
+ msg.msg_flags = flags;
+
+ lock_sock(sk);
+ skb = np->pktoptions;
+ if (skb)
+ ip6_datagram_recv_ctl(sk, &msg, skb);
+ release_sock(sk);
+ if (!skb) {
+ if (np->rxopt.bits.rxinfo) {
+ struct in6_pktinfo src_info;
+ src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
+ np->sticky_pktinfo.ipi6_ifindex;
+ src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr;
+ put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
+ }
+ if (np->rxopt.bits.rxhlim) {
+ int hlim = np->mcast_hops;
+ put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
+ }
+ if (np->rxopt.bits.rxtclass) {
+ int tclass = (int)ip6_tclass(np->rcv_flowinfo);
+
+ put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
+ }
+ if (np->rxopt.bits.rxoinfo) {
+ struct in6_pktinfo src_info;
+ src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
+ np->sticky_pktinfo.ipi6_ifindex;
+ src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr :
+ np->sticky_pktinfo.ipi6_addr;
+ 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);
+ }
+ if (np->rxopt.bits.rxflow) {
+ __be32 flowinfo = np->rcv_flowinfo;
+
+ put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
+ }
+ }
+ len -= msg.msg_controllen;
+ return put_user(len, optlen);
+ }
+ case IPV6_MTU:
+ {
+ struct dst_entry *dst;
+
+ val = 0;
+ rcu_read_lock();
+ dst = __sk_dst_get(sk);
+ if (dst)
+ val = dst_mtu(dst);
+ rcu_read_unlock();
+ if (!val)
+ return -ENOTCONN;
+ break;
+ }
+
+ case IPV6_V6ONLY:
+ val = sk->sk_ipv6only;
+ break;
+
+ case IPV6_RECVPKTINFO:
+ val = np->rxopt.bits.rxinfo;
+ break;
+
+ case IPV6_2292PKTINFO:
+ val = np->rxopt.bits.rxoinfo;
+ break;
+
+ case IPV6_RECVHOPLIMIT:
+ val = np->rxopt.bits.rxhlim;
+ break;
+
+ 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:
+ {
+ struct ipv6_txoptions *opt;
+
+ lock_sock(sk);
+ opt = rcu_dereference_protected(np->opt,
+ lockdep_sock_is_held(sk));
+ len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len);
+ release_sock(sk);
+ /* check if ipv6_getsockopt_sticky() returns err code */
+ if (len < 0)
+ return len;
+ return put_user(len, optlen);
+ }
+
+ case IPV6_RECVHOPOPTS:
+ val = np->rxopt.bits.hopopts;
+ break;
+
+ 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_TCLASS:
+ val = np->tclass;
+ break;
+
+ case IPV6_RECVTCLASS:
+ val = np->rxopt.bits.rxtclass;
+ break;
+
+ case IPV6_FLOWINFO:
+ val = np->rxopt.bits.rxflow;
+ break;
+
+ case IPV6_RECVPATHMTU:
+ val = np->rxopt.bits.rxpmtu;
+ break;
+
+ case IPV6_PATHMTU:
+ {
+ struct dst_entry *dst;
+ struct ip6_mtuinfo mtuinfo;
+
+ if (len < sizeof(mtuinfo))
+ return -EINVAL;
+
+ len = sizeof(mtuinfo);
+ memset(&mtuinfo, 0, sizeof(mtuinfo));
+
+ rcu_read_lock();
+ dst = __sk_dst_get(sk);
+ if (dst)
+ mtuinfo.ip6m_mtu = dst_mtu(dst);
+ rcu_read_unlock();
+ if (!mtuinfo.ip6m_mtu)
+ return -ENOTCONN;
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &mtuinfo, len))
+ return -EFAULT;
+
+ return 0;
+ }
+
+ case IPV6_TRANSPARENT:
+ val = inet_sk(sk)->transparent;
+ break;
+
+ case IPV6_RECVORIGDSTADDR:
+ val = np->rxopt.bits.rxorigdstaddr;
+ break;
+
+ case IPV6_UNICAST_HOPS:
+ case IPV6_MULTICAST_HOPS:
+ {
+ struct dst_entry *dst;
+
+ if (optname == IPV6_UNICAST_HOPS)
+ val = np->hop_limit;
+ else
+ val = np->mcast_hops;
+
+ if (val < 0) {
+ rcu_read_lock();
+ dst = __sk_dst_get(sk);
+ if (dst)
+ val = ip6_dst_hoplimit(dst);
+ rcu_read_unlock();
+ }
+
+ if (val < 0)
+ val = sock_net(sk)->ipv6.devconf_all->hop_limit;
+ break;
+ }
+
+ case IPV6_MULTICAST_LOOP:
+ val = np->mc_loop;
+ break;
+
+ case IPV6_MULTICAST_IF:
+ val = np->mcast_oif;
+ break;
+
+ case IPV6_UNICAST_IF:
+ val = (__force int)htonl((__u32) np->ucast_oif);
+ break;
+
+ case IPV6_MTU_DISCOVER:
+ val = np->pmtudisc;
+ break;
+
+ case IPV6_RECVERR:
+ val = np->recverr;
+ break;
+
+ case IPV6_FLOWINFO_SEND:
+ val = np->sndflow;
+ break;
+
+ case IPV6_FLOWLABEL_MGR:
+ {
+ struct in6_flowlabel_req freq;
+ int flags;
+
+ if (len < sizeof(freq))
+ return -EINVAL;
+
+ if (copy_from_user(&freq, optval, sizeof(freq)))
+ return -EFAULT;
+
+ if (freq.flr_action != IPV6_FL_A_GET)
+ return -EINVAL;
+
+ len = sizeof(freq);
+ flags = freq.flr_flags;
+
+ memset(&freq, 0, sizeof(freq));
+
+ val = ipv6_flowlabel_opt_get(sk, &freq, flags);
+ if (val < 0)
+ return val;
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &freq, len))
+ return -EFAULT;
+
+ return 0;
+ }
+
+ case IPV6_ADDR_PREFERENCES:
+ val = 0;
+
+ if (np->srcprefs & IPV6_PREFER_SRC_TMP)
+ val |= IPV6_PREFER_SRC_TMP;
+ else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
+ val |= IPV6_PREFER_SRC_PUBLIC;
+ else {
+ /* XXX: should we return system default? */
+ val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
+ }
+
+ if (np->srcprefs & IPV6_PREFER_SRC_COA)
+ val |= IPV6_PREFER_SRC_COA;
+ else
+ val |= IPV6_PREFER_SRC_HOME;
+ break;
+
+ case IPV6_MINHOPCOUNT:
+ val = np->min_hopcount;
+ break;
+
+ case IPV6_DONTFRAG:
+ val = np->dontfrag;
+ break;
+
+ case IPV6_AUTOFLOWLABEL:
+ val = ip6_autoflowlabel(sock_net(sk), np);
+ break;
+
+ case IPV6_RECVFRAGSIZE:
+ val = np->rxopt.bits.recvfragsize;
+ break;
+
+ default:
+ return -ENOPROTOOPT;
+ }
+ len = min_t(unsigned int, sizeof(int), len);
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &val, len))
+ return -EFAULT;
+ return 0;
+}
+
+int ipv6_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ int err;
+
+ if (level == SOL_IP && sk->sk_type != SOCK_RAW)
+ return udp_prot.getsockopt(sk, level, optname, optval, optlen);
+
+ if (level != SOL_IPV6)
+ return -ENOPROTOOPT;
+
+ err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0);
+#ifdef CONFIG_NETFILTER
+ /* we need to exclude all possible ENOPROTOOPTs except default case */
+ if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ err = nf_getsockopt(sk, PF_INET6, optname, optval, &len);
+ if (err >= 0)
+ err = put_user(len, optlen);
+ }
+#endif
+ return err;
+}
+EXPORT_SYMBOL(ipv6_getsockopt);
+
+#ifdef CONFIG_COMPAT
+int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ int err;
+
+ if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
+ if (udp_prot.compat_getsockopt != NULL)
+ return udp_prot.compat_getsockopt(sk, level, optname,
+ optval, optlen);
+ return udp_prot.getsockopt(sk, level, optname, optval, optlen);
+ }
+
+ if (level != SOL_IPV6)
+ return -ENOPROTOOPT;
+
+ if (optname == MCAST_MSFILTER)
+ return compat_mc_getsockopt(sk, level, optname, optval, optlen,
+ ipv6_getsockopt);
+
+ err = do_ipv6_getsockopt(sk, level, optname, optval, optlen,
+ MSG_CMSG_COMPAT);
+#ifdef CONFIG_NETFILTER
+ /* we need to exclude all possible ENOPROTOOPTs except default case */
+ if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ err = compat_nf_getsockopt(sk, PF_INET6, optname, optval, &len);
+ if (err >= 0)
+ err = put_user(len, optlen);
+ }
+#endif
+ return err;
+}
+EXPORT_SYMBOL(compat_ipv6_getsockopt);
+#endif
+