smdk4412: network: squashed commits

commit 9792f37daba788506559f99832c62b240402296c
Author: Sreeram Ramachandran <sreeram@google.com>
Date:   Tue Jul 8 11:37:03 2014 -0700

    Handle 'sk' being NULL in UID-based routing.

    Bug: 15413527
    Change-Id: If33bebb7b52c0ebfa8dac2452607bce0c2b0faa0
    Signed-off-by: Sreeram Ramachandran <sreeram@google.com>

commit 7ab80d7fd3f1e3faebb14313119700fd7416ad54
Author: Lorenzo Colitti <lorenzo@google.com>
Date:   Mon Mar 31 16:23:51 2014 +0900

    net: core: Support UID-based routing.

    This contains the following commits:

    1. 0149763 net: core: Add a UID range to fib rules.
    2. 1650474 net: core: Use the socket UID in routing lookups.
    3. 0b16771 net: ipv4: Add the UID to the route cache.
    4. ee058f1 net: core: Add a RTA_UID attribute to routes.
        This is so that userspace can do per-UID route lookups.

    Bug: 15413527
    Change-Id: I1285474c6734614d3bda6f61d88dfe89a4af7892
    Signed-off-by: Lorenzo Colitti <lorenzo@google.com>

commit a769ab7f07dcbbf29f2a8658aa5486bb6a2a66c3
Author: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date:   Fri Mar 8 02:07:16 2013 +0000

    ipv6: introdcue __ipv6_addr_needs_scope_id and ipv6_iface_scope_id helper functions

    [net-next commit b7ef213ef65256168df83ddfbb8131ed9adc10f9]

    __ipv6_addr_needs_scope_id checks if an ipv6 address needs to supply
    a 'sin6_scope_id != 0'. 'sin6_scope_id != 0' was enforced in case
    of link-local addresses. To support interface-local multicast these
    checks had to be enhanced and are now consolidated into these new helper
    functions.

    v2:
    a) migrated to struct ipv6_addr_props

    v3:
    a) reverted changes for ipv6_addr_props
    b) test for address type instead of comparing scope

    v4:
    a) unchanged

    Change-Id: Id6fc54cec61f967928e08a9eba4f857157d973a3
    Suggested-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
    Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
    Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
    Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
    Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
    Signed-off-by: David S. Miller <davem@davemloft.net>

commit af9b98af02a072c3eb0f3dd7d3df7242d8294e5c
Author: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date:   Mon Nov 18 07:07:45 2013 +0100

    ping: prevent NULL pointer dereference on write to msg_name

    A plain read() on a socket does set msg->msg_name to NULL. So check for
    NULL pointer first.

    [Backport of net-next cf970c002d270c36202bd5b9c2804d3097a52da0]

    Bug: 12780426
    Change-Id: I29d9cb95ef05ec76d37517e01317f4a29e60931c
    Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Lorenzo Colitti <lorenzo@google.com>

commit d66ae9bbbf35cd6e7a3d04f6946d506b3148f06b
Author: Cong Wang <amwang@redhat.com>
Date:   Sun Jun 2 22:43:52 2013 +0000

    ping: always initialize ->sin6_scope_id and ->sin6_flowinfo

    [net-next commit c26d6b46da3ee86fa8a864347331e5513ca84c2b]

    If we don't need scope id, we should initialize it to zero.
    Same for ->sin6_flowinfo.

    Change-Id: I28e4bc9593e76fc3434052182466fab4bb8ccf3a
    Cc: Lorenzo Colitti <lorenzo@google.com>
    Cc: David S. Miller <davem@davemloft.net>
    Signed-off-by: Cong Wang <amwang@redhat.com>
    Acked-by: Lorenzo Colitti <lorenzo@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

commit 22d188e621c143108e1207831e5817f24d0cccc0
Author: Lorenzo Colitti <lorenzo@google.com>
Date:   Thu Jul 4 00:12:40 2013 +0900

    net: ipv6: fix wrong ping_v6_sendmsg return value

    [net-next commit fbfe80c890a1dc521d0b629b870e32fcffff0da5]

    ping_v6_sendmsg currently returns 0 on success. It should return
    the number of bytes written instead.

    Bug: 9469865
    Change-Id: I82b7d3a37ba91ad24e6dbd97a4880745ce16ad31
    Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

commit b691b1c9931f86c3fc7a10208030752f205d1adf
Author: Lorenzo Colitti <lorenzo@google.com>
Date:   Thu Jul 4 00:52:49 2013 +0900

    net: ipv6: add missing lock in ping_v6_sendmsg

    [net-next commit a1bdc45580fc19e968b32ad27cd7e476a4aa58f6]

    Bug: 9469865
    Change-Id: I480f8ce95956dd8f17fbbb26dc60cc162f8ec933
    Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

commit 515b76147e907579254cd5997a4ab9e64da32268
Author: Lorenzo Colitti <lorenzo@google.com>
Date:   Wed Jan 16 22:09:49 2013 +0000

    net: ipv6: Add IPv6 support to the ping socket.

    [backport of net-next 6d0bfe22611602f36617bc7aa2ffa1bbb2f54c67]

    This adds the ability to send ICMPv6 echo requests without a
    raw socket. The equivalent ability for ICMPv4 was added in
    2011.

    Instead of having separate code paths for IPv4 and IPv6, make
    most of the code in net/ipv4/ping.c dual-stack and only add a
    few IPv6-specific bits (like the protocol definition) to a new
    net/ipv6/ping.c. Hopefully this will reduce divergence and/or
    duplication of bugs in the future.

    Caveats:

    - Setting options via ancillary data (e.g., using IPV6_PKTINFO
      to specify the outgoing interface) is not yet supported.
    - There are no separate security settings for IPv4 and IPv6;
      everything is controlled by /proc/net/ipv4/ping_group_range.
    - The proc interface does not yet display IPv6 ping sockets
      properly.

    Tested with a patched copy of ping6 and using raw socket calls.
    Compiles and works with all of CONFIG_IPV6={n,m,y}.

    Change-Id: Ia359af556021344fc7f890c21383aadf950b6498
    Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    [lorenzo@google.com: backported to 3.0]
    Signed-off-by: Lorenzo Colitti <lorenzo@google.com>

commit d72b1c37bab1bbdebb096421b5ef88ceec6eae8e
Author: Li Wei <lw@cn.fujitsu.com>
Date:   Thu Feb 21 00:09:54 2013 +0000

    ipv4: fix a bug in ping_err().

    [ Upstream commit b531ed61a2a2a77eeb2f7c88b49aa5ec7d9880d8 ]

    We should get 'type' and 'code' from the outer ICMP header.

    Change-Id: I9a467b4aa794127f22dbc5f802d17ae618aa0c74
    Signed-off-by: Li Wei <lw@cn.fujitsu.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit ead1926fc318a4c97e735a885db40e77135c0531
Author: Eric Dumazet <eric.dumazet@gmail.com>
Date:   Mon Oct 24 03:06:21 2011 -0400

    ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT

    There is a long standing bug in linux tcp stack, about ACK messages sent
    on behalf of TIME_WAIT sockets.

    In the IP header of the ACK message, we choose to reflect TOS field of
    incoming message, and this might break some setups.

    Example of things that were broken :
      - Routing using TOS as a selector
      - Firewalls
      - Trafic classification / shaping

    We now remember in timewait structure the inet tos field and use it in
    ACK generation, and route lookup.

    Notes :
     - We still reflect incoming TOS in RST messages.
     - We could extend MuraliRaja Muniraju patch to report TOS value in
    netlink messages for TIME_WAIT sockets.
     - A patch is needed for IPv6

    Change-Id: Ic7ad8a7b858de181bfe2a789c472f84955397d4c
    Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

commit 47ef68bdd0ceb7113496f3325068202e5d1f3eba
Author: Eric Dumazet <eric.dumazet@gmail.com>
Date:   Wed Nov 30 19:00:53 2011 +0000

    ipv4: use a 64bit load/store in output path

    gcc compiler is smart enough to use a single load/store if we
    memcpy(dptr, sptr, 8) on x86_64, regardless of
    CONFIG_CC_OPTIMIZE_FOR_SIZE

    In IP header, daddr immediately follows saddr, this wont change in the
    future. We only need to make sure our flowi4 (saddr,daddr) fields wont
    break the rule.

    Change-Id: Iad9c8fd9121ec84c2599b013badaebba92db7c39
    Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

commit 5b7251328273e10d0d768a24f7b555d1e1f671e6
Author: Julian Anastasov <ja@ssi.bg>
Date:   Sun Aug 7 09:16:09 2011 +0000

    ipv4: route non-local sources for raw socket

    The raw sockets can provide source address for
    routing but their privileges are not considered. We
    can provide non-local source address, make sure the
    FLOWI_FLAG_ANYSRC flag is set if socket has privileges
    for this, i.e. based on hdrincl (IP_HDRINCL) and
    transparent flags.

    Change-Id: I136b161c584deac3885efbf217e959e1a829fc1d
    Signed-off-by: Julian Anastasov <ja@ssi.bg>
    Signed-off-by: David S. Miller <davem@davemloft.net>

Change-Id: I0022e9536ee1861bf163e5bba4a86a3e94669960

11 files changed, 268 insertions, 7 deletions

diff --git a/net/ipv6/Makefile b/net/ipv6/Makefile
index 686934a..753be5d 100644
--- a/net/ipv6/Makefile
+++ b/net/ipv6/Makefile
@@ -7,7 +7,7 @@ obj-$(CONFIG_IPV6) += ipv6.o
 ipv6-objs :=	af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
 		addrlabel.o \
 		route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o udplite.o \
-		raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
+		raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o ping.o \
 		exthdrs.o datagram.o ip6_flowlabel.o inet6_connection_sock.o
 
 ipv6-$(CONFIG_SYSCTL) = sysctl_net_ipv6.o
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 7e8340e..8ab921a6 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -49,6 +49,7 @@
 #include <net/udplite.h>
 #include <net/tcp.h>
 #include <net/ipip.h>
+#include <net/ping.h>
 #include <net/protocol.h>
 #include <net/inet_common.h>
 #include <net/route.h>
@@ -701,6 +702,7 @@ int inet6_sk_rebuild_header(struct sock *sk)
 		fl6.flowi6_mark = sk->sk_mark;
 		fl6.fl6_dport = inet->inet_dport;
 		fl6.fl6_sport = inet->inet_sport;
+		fl6.flowi6_uid = sock_i_uid(sk);
 		security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
 		final_p = fl6_update_dst(&fl6, np->opt, &final);
@@ -1130,6 +1132,9 @@ static int __init inet6_init(void)
 	if (err)
 		goto out_unregister_udplite_proto;
 
+	err = proto_register(&pingv6_prot, 1);
+	if (err)
+		goto out_unregister_ping_proto;
 
 	/* We MUST register RAW sockets before we create the ICMP6,
 	 * IGMP6, or NDISC control sockets.
@@ -1223,6 +1228,10 @@ static int __init inet6_init(void)
 	if (err)
 		goto ipv6_packet_fail;
 
+	err = pingv6_init();
+	if (err)
+		goto pingv6_fail;
+
 #ifdef CONFIG_SYSCTL
 	err = ipv6_sysctl_register();
 	if (err)
@@ -1235,6 +1244,8 @@ out:
 sysctl_fail:
 	ipv6_packet_cleanup();
 #endif
+pingv6_fail:
+	pingv6_exit();
 ipv6_packet_fail:
 	tcpv6_exit();
 tcpv6_fail:
@@ -1282,6 +1293,8 @@ static_sysctl_fail:
 	rtnl_unregister_all(PF_INET6);
 out_sock_register_fail:
 	rawv6_exit();
+out_unregister_ping_proto:
+	proto_unregister(&pingv6_prot);
 out_unregister_raw_proto:
 	proto_unregister(&rawv6_prot);
 out_unregister_udplite_proto:
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 1656033..5a781e4 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -153,6 +153,7 @@ ipv4_connected:
 	fl6.flowi6_mark = sk->sk_mark;
 	fl6.fl6_dport = inet->inet_dport;
 	fl6.fl6_sport = inet->inet_sport;
+	fl6.flowi6_uid = sock_i_uid(sk);
 
 	if (!fl6.flowi6_oif && (addr_type&IPV6_ADDR_MULTICAST))
 		fl6.flowi6_oif = np->mcast_oif;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 1190041..6a12eda 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -55,6 +55,7 @@
 
 #include <net/ipv6.h>
 #include <net/ip6_checksum.h>
+#include <net/ping.h>
 #include <net/protocol.h>
 #include <net/raw.h>
 #include <net/rawv6.h>
@@ -80,10 +81,22 @@ static inline struct sock *icmpv6_sk(struct net *net)
 	return net->ipv6.icmp_sk[smp_processor_id()];
 }
 
+static void icmpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+		       u8 type, u8 code, int offset, __be32 info)
+{
+	/* icmpv6_notify checks 8 bytes can be pulled, icmp6hdr is 8 bytes */
+	struct icmp6hdr *icmp6 = (struct icmp6hdr *) (skb->data + offset);
+
+	if (!(type & ICMPV6_INFOMSG_MASK))
+		if (icmp6->icmp6_type == ICMPV6_ECHO_REQUEST)
+			ping_err(skb, offset, info);
+}
+
 static int icmpv6_rcv(struct sk_buff *skb);
 
 static const struct inet6_protocol icmpv6_protocol = {
 	.handler	=	icmpv6_rcv,
+	.err_handler	=	icmpv6_err,
 	.flags		=	INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
@@ -217,7 +230,8 @@ static __inline__ int opt_unrec(struct sk_buff *skb, __u32 offset)
 	return (*op & 0xC0) == 0x80;
 }
 
-static int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, struct icmp6hdr *thdr, int len)
+int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
+			       struct icmp6hdr *thdr, int len)
 {
 	struct sk_buff *skb;
 	struct icmp6hdr *icmp6h;
@@ -300,8 +314,8 @@ static void mip6_addr_swap(struct sk_buff *skb)
 static inline void mip6_addr_swap(struct sk_buff *skb) {}
 #endif
 
-static struct dst_entry *icmpv6_route_lookup(struct net *net, struct sk_buff *skb,
-					     struct sock *sk, struct flowi6 *fl6)
+struct dst_entry *icmpv6_route_lookup(struct net *net, struct sk_buff *skb,
+				      struct sock *sk, struct flowi6 *fl6)
 {
 	struct dst_entry *dst, *dst2;
 	struct flowi6 fl2;
@@ -595,7 +609,7 @@ out:
 	icmpv6_xmit_unlock(sk);
 }
 
-static void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
+void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
 {
 	const struct inet6_protocol *ipprot;
 	int inner_offset;
@@ -686,7 +700,8 @@ static int icmpv6_rcv(struct sk_buff *skb)
 		skb->csum = ~csum_unfold(csum_ipv6_magic(saddr, daddr, skb->len,
 					     IPPROTO_ICMPV6, 0));
 		if (__skb_checksum_complete(skb)) {
-			LIMIT_NETDEBUG(KERN_DEBUG "ICMPv6 checksum failed [%pI6 > %pI6]\n",
+			LIMIT_NETDEBUG(KERN_DEBUG
+				       "ICMPv6 checksum failed [%pI6c > %pI6c]\n",
 				       saddr, daddr);
 			goto discard_it;
 		}
@@ -707,7 +722,7 @@ static int icmpv6_rcv(struct sk_buff *skb)
 		break;
 
 	case ICMPV6_ECHO_REPLY:
-		/* we couldn't care less */
+		ping_rcv(skb);
 		break;
 
 	case ICMPV6_PKT_TOOBIG:
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 8a58e8c..ffb131fb 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -72,6 +72,7 @@ struct dst_entry *inet6_csk_route_req(struct sock *sk,
 	fl6.flowi6_mark = sk->sk_mark;
 	fl6.fl6_dport = inet_rsk(req)->rmt_port;
 	fl6.fl6_sport = inet_rsk(req)->loc_port;
+	fl6.flowi6_uid = sock_i_uid(sk);
 	security_req_classify_flow(req, flowi6_to_flowi(&fl6));
 
 	dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
@@ -222,6 +223,7 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
 	fl6.flowi6_mark = sk->sk_mark;
 	fl6.fl6_sport = inet->inet_sport;
 	fl6.fl6_dport = inet->inet_dport;
+	fl6.flowi6_uid = sock_i_uid(sk);
 	security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
 	final_p = fl6_update_dst(&fl6, np->opt, &final);
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
new file mode 100644
index 0000000..99456ef
--- /dev/null
+++ b/net/ipv6/ping.c
@@ -0,0 +1,218 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		"Ping" sockets
+ *
+ *		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.
+ *
+ * Based on ipv4/ping.c code.
+ *
+ * Authors:	Lorenzo Colitti (IPv6 support)
+ *		Vasiliy Kulikov / Openwall (IPv4 implementation, for Linux 2.6),
+ *		Pavel Kankovsky (IPv4 implementation, for Linux 2.4.32)
+ *
+ */
+
+#include <net/addrconf.h>
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#include <net/protocol.h>
+#include <net/udp.h>
+#include <net/transp_v6.h>
+#include <net/ping.h>
+
+struct proto pingv6_prot = {
+	.name =		"PINGv6",
+	.owner =	THIS_MODULE,
+	.init =		ping_init_sock,
+	.close =	ping_close,
+	.connect =	ip6_datagram_connect,
+	.disconnect =	udp_disconnect,
+	.setsockopt =	ipv6_setsockopt,
+	.getsockopt =	ipv6_getsockopt,
+	.sendmsg =	ping_v6_sendmsg,
+	.recvmsg =	ping_recvmsg,
+	.bind =		ping_bind,
+	.backlog_rcv =	ping_queue_rcv_skb,
+	.hash =		ping_hash,
+	.unhash =	ping_unhash,
+	.get_port =	ping_get_port,
+	.obj_size =	sizeof(struct raw6_sock),
+};
+EXPORT_SYMBOL_GPL(pingv6_prot);
+
+static struct inet_protosw pingv6_protosw = {
+	.type =      SOCK_DGRAM,
+	.protocol =  IPPROTO_ICMPV6,
+	.prot =      &pingv6_prot,
+	.ops =       &inet6_dgram_ops,
+	.no_check =  UDP_CSUM_DEFAULT,
+	.flags =     INET_PROTOSW_REUSE,
+};
+
+
+/* Compatibility glue so we can support IPv6 when it's compiled as a module */
+int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
+{
+	return -EAFNOSUPPORT;
+}
+int dummy_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
+				 struct sk_buff *skb)
+{
+	return -EAFNOSUPPORT;
+}
+int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
+{
+	return -EAFNOSUPPORT;
+}
+void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
+			    __be16 port, u32 info, u8 *payload) {}
+int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
+			struct net_device *dev, int strict)
+{
+	return 0;
+}
+
+int __init pingv6_init(void)
+{
+	pingv6_ops.ipv6_recv_error = ipv6_recv_error;
+	pingv6_ops.datagram_recv_ctl = datagram_recv_ctl;
+	pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
+	pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
+	pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
+	return inet6_register_protosw(&pingv6_protosw);
+}
+
+/* This never gets called because it's not possible to unload the ipv6 module,
+ * but just in case.
+ */
+void pingv6_exit(void)
+{
+	pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
+	pingv6_ops.datagram_recv_ctl = dummy_datagram_recv_ctl;
+	pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
+	pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
+	pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
+	inet6_unregister_protosw(&pingv6_protosw);
+}
+
+int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+		    size_t len)
+{
+	struct inet_sock *inet = inet_sk(sk);
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct icmp6hdr user_icmph;
+	int addr_type;
+	struct in6_addr *daddr;
+	int iif = 0;
+	struct flowi6 fl6;
+	int err;
+	int hlimit;
+	struct dst_entry *dst;
+	struct rt6_info *rt;
+	struct pingfakehdr pfh;
+
+	pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
+
+	err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
+				  sizeof(user_icmph));
+	if (err)
+		return err;
+
+	if (msg->msg_name) {
+		struct sockaddr_in6 *u = (struct sockaddr_in6 *) msg->msg_name;
+		if (msg->msg_namelen < sizeof(struct sockaddr_in6) ||
+		    u->sin6_family != AF_INET6) {
+			return -EINVAL;
+		}
+		if (sk->sk_bound_dev_if &&
+		    sk->sk_bound_dev_if != u->sin6_scope_id) {
+			return -EINVAL;
+		}
+		daddr = &(u->sin6_addr);
+		iif = u->sin6_scope_id;
+	} else {
+		if (sk->sk_state != TCP_ESTABLISHED)
+			return -EDESTADDRREQ;
+		daddr = &np->daddr;
+	}
+
+	if (!iif)
+		iif = sk->sk_bound_dev_if;
+
+	addr_type = ipv6_addr_type(daddr);
+	if (__ipv6_addr_needs_scope_id(addr_type) && !iif)
+		return -EINVAL;
+	if (addr_type & IPV6_ADDR_MAPPED)
+		return -EINVAL;
+
+	/* TODO: use ip6_datagram_send_ctl to get options from cmsg */
+
+	memset(&fl6, 0, sizeof(fl6));
+
+	fl6.flowi6_proto = IPPROTO_ICMPV6;
+	fl6.saddr = np->saddr;
+	fl6.daddr = *daddr;
+	fl6.fl6_icmp_type = user_icmph.icmp6_type;
+	fl6.fl6_icmp_code = user_icmph.icmp6_code;
+	fl6.flowi6_uid = sock_i_uid(sk);
+	security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
+
+	if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
+		fl6.flowi6_oif = np->mcast_oif;
+
+	dst = ip6_sk_dst_lookup_flow(sk, &fl6,  daddr, 1);
+	if (IS_ERR(dst))
+		return PTR_ERR(dst);
+	rt = (struct rt6_info *) dst;
+
+	np = inet6_sk(sk);
+	if (!np)
+		return -EBADF;
+
+	if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
+		fl6.flowi6_oif = np->mcast_oif;
+
+	pfh.icmph.type = user_icmph.icmp6_type;
+	pfh.icmph.code = user_icmph.icmp6_code;
+	pfh.icmph.checksum = 0;
+	pfh.icmph.un.echo.id = inet->inet_sport;
+	pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
+	pfh.iov = msg->msg_iov;
+	pfh.wcheck = 0;
+	pfh.family = AF_INET6;
+
+	if (ipv6_addr_is_multicast(&fl6.daddr))
+		hlimit = np->mcast_hops;
+	else
+		hlimit = np->hop_limit;
+	if (hlimit < 0)
+		hlimit = ip6_dst_hoplimit(dst);
+
+	lock_sock(sk);
+	err = ip6_append_data(sk, ping_getfrag, &pfh, len,
+			      0, hlimit,
+			      np->tclass, NULL, &fl6, rt,
+			      MSG_DONTWAIT, np->dontfrag);
+
+	if (err) {
+		ICMP6_INC_STATS_BH(sock_net(sk), rt->rt6i_idev,
+				   ICMP6_MIB_OUTERRORS);
+		ip6_flush_pending_frames(sk);
+	} else {
+		err = icmpv6_push_pending_frames(sk, &fl6,
+						 (struct icmp6hdr *) &pfh.icmph,
+						 len);
+	}
+	release_sock(sk);
+
+	if (err)
+		return err;
+
+	return len;
+}
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index fb812a6..0a7eae0 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -757,6 +757,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 	memset(&fl6, 0, sizeof(fl6));
 
 	fl6.flowi6_mark = sk->sk_mark;
+	fl6.flowi6_uid = sock_i_uid(sk);
 
 	if (sin6) {
 		if (addr_len < SIN6_LEN_RFC2133)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 594da96..fd8cb96 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2197,6 +2197,7 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = {
 	[RTA_IIF]		= { .type = NLA_U32 },
 	[RTA_PRIORITY]          = { .type = NLA_U32 },
 	[RTA_METRICS]           = { .type = NLA_NESTED },
+	[RTA_UID]		= { .type = NLA_U32 },
 };
 
 static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -2500,6 +2501,11 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 	if (tb[RTA_OIF])
 		fl6.flowi6_oif = nla_get_u32(tb[RTA_OIF]);
 
+	if (tb[RTA_UID])
+		fl6.flowi6_uid = nla_get_u32(tb[RTA_UID]);
+	else
+		fl6.flowi6_uid = (iif ? (uid_t) -1 : current_uid());
+
 	if (iif) {
 		struct net_device *dev;
 		dev = __dev_get_by_index(net, iif);
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 14b8339..044e784 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -243,6 +243,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
 		fl6.flowi6_mark = sk->sk_mark;
 		fl6.fl6_dport = inet_rsk(req)->rmt_port;
 		fl6.fl6_sport = inet_sk(sk)->inet_sport;
+		fl6.flowi6_uid = sock_i_uid(sk);
 		security_req_classify_flow(req, flowi6_to_flowi(&fl6));
 
 		dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index a6d5850..d039a25 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -251,6 +251,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	fl6.flowi6_mark = sk->sk_mark;
 	fl6.fl6_dport = usin->sin6_port;
 	fl6.fl6_sport = inet->inet_sport;
+	fl6.flowi6_uid = sock_i_uid(sk);
 
 	final_p = fl6_update_dst(&fl6, np->opt, &final);
 
@@ -404,6 +405,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 			fl6.flowi6_mark = sk->sk_mark;
 			fl6.fl6_dport = inet->inet_dport;
 			fl6.fl6_sport = inet->inet_sport;
+			fl6.flowi6_uid = sock_i_uid(sk);
 			security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
 
 			dst = ip6_dst_lookup_flow(sk, &fl6, NULL, false);
@@ -496,6 +498,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 	fl6.flowi6_mark = sk->sk_mark;
 	fl6.fl6_dport = inet_rsk(req)->rmt_port;
 	fl6.fl6_sport = inet_rsk(req)->loc_port;
+	fl6.flowi6_uid = sock_i_uid(sk);
 	security_req_classify_flow(req, flowi6_to_flowi(&fl6));
 
 	opt = np->opt;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 0d920c5..f90e615 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1084,6 +1084,7 @@ do_udp_sendmsg:
 		fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
 
 	fl6.flowi6_mark = sk->sk_mark;
+	fl6.flowi6_uid = sock_i_uid(sk);
 
 	if (msg->msg_controllen) {
 		opt = &opt_space;