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linux/net/ipv6/raw.c
David S. Miller f23d60de71 ipv6: Fix duplicate initialization of rawv6_prot.destroy 
In changeset 22dd485022
("raw: Raw socket leak.") code was added so that we
flush pending frames on raw sockets to avoid leaks.

The ipv4 part was fine, but the ipv6 part was not
done correctly.  Unlike the ipv4 side, the ipv6 code
already has a .destroy method for rawv6_prot.

So now there were two assignments to this member, and
what the compiler does is use the last one, effectively
making the ipv6 parts of that changeset a NOP.

Fix this by removing the:

	.destroy	   = inet6_destroy_sock,

line, and adding an inet6_destroy_sock() call to the
end of raw6_destroy().

Noticed by Al Viro.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-06-12 16:34:34 -07:00

1362 lines
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/*
* RAW sockets for IPv6
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* Adapted from linux/net/ipv4/raw.c
*
* $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
*
* Fixes:
* Hideaki YOSHIFUJI : sin6_scope_id support
* YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
* Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
*
* 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.
*/
#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/netdevice.h>
#include <linux/if_arp.h>
#include <linux/icmpv6.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
#include <linux/skbuff.h>
#include <asm/uaccess.h>
#include <asm/ioctls.h>
#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/snmp.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/protocol.h>
#include <net/ip6_route.h>
#include <net/ip6_checksum.h>
#include <net/addrconf.h>
#include <net/transp_v6.h>
#include <net/udp.h>
#include <net/inet_common.h>
#include <net/tcp_states.h>
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
#include <net/mip6.h>
#endif
#include <linux/mroute6.h>
#include <net/raw.h>
#include <net/rawv6.h>
#include <net/xfrm.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static struct raw_hashinfo raw_v6_hashinfo = {
.lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
};
static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
unsigned short num, struct in6_addr *loc_addr,
struct in6_addr *rmt_addr, int dif)
{
struct hlist_node *node;
int is_multicast = ipv6_addr_is_multicast(loc_addr);
sk_for_each_from(sk, node)
if (inet_sk(sk)->num == num) {
struct ipv6_pinfo *np = inet6_sk(sk);
if (!net_eq(sock_net(sk), net))
continue;
if (!ipv6_addr_any(&np->daddr) &&
!ipv6_addr_equal(&np->daddr, rmt_addr))
continue;
if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
continue;
if (!ipv6_addr_any(&np->rcv_saddr)) {
if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
goto found;
if (is_multicast &&
inet6_mc_check(sk, loc_addr, rmt_addr))
goto found;
continue;
}
goto found;
}
sk = NULL;
found:
return sk;
}
/*
* 0 - deliver
* 1 - block
*/
static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
{
struct icmp6hdr *icmph;
struct raw6_sock *rp = raw6_sk(sk);
if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
__u32 *data = &rp->filter.data[0];
int bit_nr;
icmph = (struct icmp6hdr *) skb->data;
bit_nr = icmph->icmp6_type;
return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
}
return 0;
}
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
struct sk_buff *skb))
{
rcu_assign_pointer(mh_filter, filter);
return 0;
}
EXPORT_SYMBOL(rawv6_mh_filter_register);
int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
struct sk_buff *skb))
{
rcu_assign_pointer(mh_filter, NULL);
synchronize_rcu();
return 0;
}
EXPORT_SYMBOL(rawv6_mh_filter_unregister);
#endif
/*
* demultiplex raw sockets.
* (should consider queueing the skb in the sock receive_queue
* without calling rawv6.c)
*
* Caller owns SKB so we must make clones.
*/
static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
{
struct in6_addr *saddr;
struct in6_addr *daddr;
struct sock *sk;
int delivered = 0;
__u8 hash;
struct net *net;
saddr = &ipv6_hdr(skb)->saddr;
daddr = saddr + 1;
hash = nexthdr & (MAX_INET_PROTOS - 1);
read_lock(&raw_v6_hashinfo.lock);
sk = sk_head(&raw_v6_hashinfo.ht[hash]);
if (sk == NULL)
goto out;
net = dev_net(skb->dev);
sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
while (sk) {
int filtered;
delivered = 1;
switch (nexthdr) {
case IPPROTO_ICMPV6:
filtered = icmpv6_filter(sk, skb);
break;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
case IPPROTO_MH:
{
/* XXX: To validate MH only once for each packet,
* this is placed here. It should be after checking
* xfrm policy, however it doesn't. The checking xfrm
* policy is placed in rawv6_rcv() because it is
* required for each socket.
*/
int (*filter)(struct sock *sock, struct sk_buff *skb);
filter = rcu_dereference(mh_filter);
filtered = filter ? filter(sk, skb) : 0;
break;
}
#endif
default:
filtered = 0;
break;
}
if (filtered < 0)
break;
if (filtered == 0) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
/* Not releasing hash table! */
if (clone) {
nf_reset(clone);
rawv6_rcv(sk, clone);
}
}
sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
IP6CB(skb)->iif);
}
out:
read_unlock(&raw_v6_hashinfo.lock);
return delivered;
}
int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
{
struct sock *raw_sk;
raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
raw_sk = NULL;
return raw_sk != NULL;
}
/* This cleans up af_inet6 a bit. -DaveM */
static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
__be32 v4addr = 0;
int addr_type;
int err;
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
addr_type = ipv6_addr_type(&addr->sin6_addr);
/* Raw sockets are IPv6 only */
if (addr_type == IPV6_ADDR_MAPPED)
return(-EADDRNOTAVAIL);
lock_sock(sk);
err = -EINVAL;
if (sk->sk_state != TCP_CLOSE)
goto out;
/* Check if the address belongs to the host. */
if (addr_type != IPV6_ADDR_ANY) {
struct net_device *dev = NULL;
if (addr_type & IPV6_ADDR_LINKLOCAL) {
if (addr_len >= sizeof(struct sockaddr_in6) &&
addr->sin6_scope_id) {
/* Override any existing binding, if another
* one is supplied by user.
*/
sk->sk_bound_dev_if = addr->sin6_scope_id;
}
/* Binding to link-local address requires an interface */
if (!sk->sk_bound_dev_if)
goto out;
dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
if (!dev) {
err = -ENODEV;
goto out;
}
}
/* ipv4 addr of the socket is invalid. Only the
* unspecified and mapped address have a v4 equivalent.
*/
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
err = -EADDRNOTAVAIL;
if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
dev, 0)) {
if (dev)
dev_put(dev);
goto out;
}
}
if (dev)
dev_put(dev);
}
inet->rcv_saddr = inet->saddr = v4addr;
ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
if (!(addr_type & IPV6_ADDR_MULTICAST))
ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
err = 0;
out:
release_sock(sk);
return err;
}
static void rawv6_err(struct sock *sk, struct sk_buff *skb,
struct inet6_skb_parm *opt,
int type, int code, int offset, __be32 info)
{
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
int err;
int harderr;
/* Report error on raw socket, if:
1. User requested recverr.
2. Socket is connected (otherwise the error indication
is useless without recverr and error is hard.
*/
if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
return;
harderr = icmpv6_err_convert(type, code, &err);
if (type == ICMPV6_PKT_TOOBIG)
harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
if (np->recverr) {
u8 *payload = skb->data;
if (!inet->hdrincl)
payload += offset;
ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
}
if (np->recverr || harderr) {
sk->sk_err = err;
sk->sk_error_report(sk);
}
}
void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
int type, int code, int inner_offset, __be32 info)
{
struct sock *sk;
int hash;
struct in6_addr *saddr, *daddr;
struct net *net;
hash = nexthdr & (RAW_HTABLE_SIZE - 1);
read_lock(&raw_v6_hashinfo.lock);
sk = sk_head(&raw_v6_hashinfo.ht[hash]);
if (sk != NULL) {
/* Note: ipv6_hdr(skb) != skb->data */
struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
saddr = &ip6h->saddr;
daddr = &ip6h->daddr;
net = dev_net(skb->dev);
while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
IP6CB(skb)->iif))) {
rawv6_err(sk, skb, NULL, type, code,
inner_offset, info);
sk = sk_next(sk);
}
}
read_unlock(&raw_v6_hashinfo.lock);
}
static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
{
if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
skb_checksum_complete(skb)) {
atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return 0;
}
/* Charge it to the socket. */
if (sock_queue_rcv_skb(sk,skb)<0) {
atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return 0;
}
return 0;
}
/*
* This is next to useless...
* if we demultiplex in network layer we don't need the extra call
* just to queue the skb...
* maybe we could have the network decide upon a hint if it
* should call raw_rcv for demultiplexing
*/
int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
{
struct inet_sock *inet = inet_sk(sk);
struct raw6_sock *rp = raw6_sk(sk);
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return NET_RX_DROP;
}
if (!rp->checksum)
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (skb->ip_summed == CHECKSUM_COMPLETE) {
skb_postpull_rcsum(skb, skb_network_header(skb),
skb_network_header_len(skb));
if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len, inet->num, skb->csum))
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
if (!skb_csum_unnecessary(skb))
skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len,
inet->num, 0));
if (inet->hdrincl) {
if (skb_checksum_complete(skb)) {
atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return 0;
}
}
rawv6_rcv_skb(sk, skb);
return 0;
}
/*
* This should be easy, if there is something there
* we return it, otherwise we block.
*/
static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len,
int noblock, int flags, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
struct sk_buff *skb;
size_t copied;
int err;
if (flags & MSG_OOB)
return -EOPNOTSUPP;
if (addr_len)
*addr_len=sizeof(*sin6);
if (flags & MSG_ERRQUEUE)
return ipv6_recv_error(sk, msg, len);
skb = skb_recv_datagram(sk, flags, noblock, &err);
if (!skb)
goto out;
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
if (skb_csum_unnecessary(skb)) {
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
} else if (msg->msg_flags&MSG_TRUNC) {
if (__skb_checksum_complete(skb))
goto csum_copy_err;
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
} else {
err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
if (err == -EINVAL)
goto csum_copy_err;
}
if (err)
goto out_free;
/* Copy the address. */
if (sin6) {
sin6->sin6_family = AF_INET6;
sin6->sin6_port = 0;
ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
sin6->sin6_flowinfo = 0;
sin6->sin6_scope_id = 0;
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6->sin6_scope_id = IP6CB(skb)->iif;
}
sock_recv_timestamp(msg, sk, skb);
if (np->rxopt.all)
datagram_recv_ctl(sk, msg, skb);
err = copied;
if (flags & MSG_TRUNC)
err = skb->len;
out_free:
skb_free_datagram(sk, skb);
out:
return err;
csum_copy_err:
skb_kill_datagram(sk, skb, flags);
/* Error for blocking case is chosen to masquerade
as some normal condition.
*/
err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
atomic_inc(&sk->sk_drops);
goto out;
}
static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
struct raw6_sock *rp)
{
struct sk_buff *skb;
int err = 0;
int offset;
int len;
int total_len;
__wsum tmp_csum;
__sum16 csum;
if (!rp->checksum)
goto send;
if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
goto out;
offset = rp->offset;
total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
skb->data);
if (offset >= total_len - 1) {
err = -EINVAL;
ip6_flush_pending_frames(sk);
goto out;
}
/* should be check HW csum miyazawa */
if (skb_queue_len(&sk->sk_write_queue) == 1) {
/*
* Only one fragment on the socket.
*/
tmp_csum = skb->csum;
} else {
struct sk_buff *csum_skb = NULL;
tmp_csum = 0;
skb_queue_walk(&sk->sk_write_queue, skb) {
tmp_csum = csum_add(tmp_csum, skb->csum);
if (csum_skb)
continue;
len = skb->len - skb_transport_offset(skb);
if (offset >= len) {
offset -= len;
continue;
}
csum_skb = skb;
}
skb = csum_skb;
}
offset += skb_transport_offset(skb);
if (skb_copy_bits(skb, offset, &csum, 2))
BUG();
/* in case cksum was not initialized */
if (unlikely(csum))
tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
csum = csum_ipv6_magic(&fl->fl6_src,
&fl->fl6_dst,
total_len, fl->proto, tmp_csum);
if (csum == 0 && fl->proto == IPPROTO_UDP)
csum = CSUM_MANGLED_0;
if (skb_store_bits(skb, offset, &csum, 2))
BUG();
send:
err = ip6_push_pending_frames(sk);
out:
return err;
}
static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
struct flowi *fl, struct rt6_info *rt,
unsigned int flags)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct ipv6hdr *iph;
struct sk_buff *skb;
int err;
if (length > rt->u.dst.dev->mtu) {
ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
return -EMSGSIZE;
}
if (flags&MSG_PROBE)
goto out;
skb = sock_alloc_send_skb(sk,
length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
flags & MSG_DONTWAIT, &err);
if (skb == NULL)
goto error;
skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb->dst = dst_clone(&rt->u.dst);
skb_put(skb, length);
skb_reset_network_header(skb);
iph = ipv6_hdr(skb);
skb->ip_summed = CHECKSUM_NONE;
skb->transport_header = skb->network_header;
err = memcpy_fromiovecend((void *)iph, from, 0, length);
if (err)
goto error_fault;
IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
dst_output);
if (err > 0)
err = np->recverr ? net_xmit_errno(err) : 0;
if (err)
goto error;
out:
return 0;
error_fault:
err = -EFAULT;
kfree_skb(skb);
error:
IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
return err;
}
static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
{
struct iovec *iov;
u8 __user *type = NULL;
u8 __user *code = NULL;
u8 len = 0;
int probed = 0;
int i;
if (!msg->msg_iov)
return 0;
for (i = 0; i < msg->msg_iovlen; i++) {
iov = &msg->msg_iov[i];
if (!iov)
continue;
switch (fl->proto) {
case IPPROTO_ICMPV6:
/* check if one-byte field is readable or not. */
if (iov->iov_base && iov->iov_len < 1)
break;
if (!type) {
type = iov->iov_base;
/* check if code field is readable or not. */
if (iov->iov_len > 1)
code = type + 1;
} else if (!code)
code = iov->iov_base;
if (type && code) {
if (get_user(fl->fl_icmp_type, type) ||
get_user(fl->fl_icmp_code, code))
return -EFAULT;
probed = 1;
}
break;
case IPPROTO_MH:
if (iov->iov_base && iov->iov_len < 1)
break;
/* check if type field is readable or not. */
if (iov->iov_len > 2 - len) {
u8 __user *p = iov->iov_base;
if (get_user(fl->fl_mh_type, &p[2 - len]))
return -EFAULT;
probed = 1;
} else
len += iov->iov_len;
break;
default:
probed = 1;
break;
}
if (probed)
break;
}
return 0;
}
static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len)
{
struct ipv6_txoptions opt_space;
struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
struct in6_addr *daddr, *final_p = NULL, final;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct raw6_sock *rp = raw6_sk(sk);
struct ipv6_txoptions *opt = NULL;
struct ip6_flowlabel *flowlabel = NULL;
struct dst_entry *dst = NULL;
struct flowi fl;
int addr_len = msg->msg_namelen;
int hlimit = -1;
int tclass = -1;
u16 proto;
int err;
/* Rough check on arithmetic overflow,
better check is made in ip6_append_data().
*/
if (len > INT_MAX)
return -EMSGSIZE;
/* Mirror BSD error message compatibility */
if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP;
/*
* Get and verify the address.
*/
memset(&fl, 0, sizeof(fl));
fl.mark = sk->sk_mark;
if (sin6) {
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
return(-EAFNOSUPPORT);
/* port is the proto value [0..255] carried in nexthdr */
proto = ntohs(sin6->sin6_port);
if (!proto)
proto = inet->num;
else if (proto != inet->num)
return(-EINVAL);
if (proto > 255)
return(-EINVAL);
daddr = &sin6->sin6_addr;
if (np->sndflow) {
fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
if (flowlabel == NULL)
return -EINVAL;
daddr = &flowlabel->dst;
}
}
/*
* Otherwise it will be difficult to maintain
* sk->sk_dst_cache.
*/
if (sk->sk_state == TCP_ESTABLISHED &&
ipv6_addr_equal(daddr, &np->daddr))
daddr = &np->daddr;
if (addr_len >= sizeof(struct sockaddr_in6) &&
sin6->sin6_scope_id &&
ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
fl.oif = sin6->sin6_scope_id;
} else {
if (sk->sk_state != TCP_ESTABLISHED)
return -EDESTADDRREQ;
proto = inet->num;
daddr = &np->daddr;
fl.fl6_flowlabel = np->flow_label;
}
if (fl.oif == 0)
fl.oif = sk->sk_bound_dev_if;
if (msg->msg_controllen) {
opt = &opt_space;
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(struct ipv6_txoptions);
err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;
}
if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
if (flowlabel == NULL)
return -EINVAL;
}
if (!(opt->opt_nflen|opt->opt_flen))
opt = NULL;
}
if (opt == NULL)
opt = np->opt;
if (flowlabel)
opt = fl6_merge_options(&opt_space, flowlabel, opt);
opt = ipv6_fixup_options(&opt_space, opt);
fl.proto = proto;
err = rawv6_probe_proto_opt(&fl, msg);
if (err)
goto out;
if (!ipv6_addr_any(daddr))
ipv6_addr_copy(&fl.fl6_dst, daddr);
else
fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
/* merge ip6_build_xmit from ip6_output */
if (opt && opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
ipv6_addr_copy(&final, &fl.fl6_dst);
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
final_p = &final;
}
if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
fl.oif = np->mcast_oif;
security_sk_classify_flow(sk, &fl);
err = ip6_dst_lookup(sk, &dst, &fl);
if (err)
goto out;
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
if (err == -EREMOTE)
err = ip6_dst_blackhole(sk, &dst, &fl);
if (err < 0)
goto out;
}
if (hlimit < 0) {
if (ipv6_addr_is_multicast(&fl.fl6_dst))
hlimit = np->mcast_hops;
else
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = ip6_dst_hoplimit(dst);
}
if (tclass < 0) {
tclass = np->tclass;
if (tclass < 0)
tclass = 0;
}
if (msg->msg_flags&MSG_CONFIRM)
goto do_confirm;
back_from_confirm:
if (inet->hdrincl) {
err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
} else {
lock_sock(sk);
err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
msg->msg_flags);
if (err)
ip6_flush_pending_frames(sk);
else if (!(msg->msg_flags & MSG_MORE))
err = rawv6_push_pending_frames(sk, &fl, rp);
release_sock(sk);
}
done:
dst_release(dst);
out:
fl6_sock_release(flowlabel);
return err<0?err:len;
do_confirm:
dst_confirm(dst);
if (!(msg->msg_flags & MSG_PROBE) || len)
goto back_from_confirm;
err = 0;
goto done;
}
static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
switch (optname) {
case ICMPV6_FILTER:
if (optlen > sizeof(struct icmp6_filter))
optlen = sizeof(struct icmp6_filter);
if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
return -EFAULT;
return 0;
default:
return -ENOPROTOOPT;
}
return 0;
}
static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
int len;
switch (optname) {
case ICMPV6_FILTER:
if (get_user(len, optlen))
return -EFAULT;
if (len < 0)
return -EINVAL;
if (len > sizeof(struct icmp6_filter))
len = sizeof(struct icmp6_filter);
if (put_user(len, optlen))
return -EFAULT;
if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
return -EFAULT;
return 0;
default:
return -ENOPROTOOPT;
}
return 0;
}
static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
struct raw6_sock *rp = raw6_sk(sk);
int val;
if (get_user(val, (int __user *)optval))
return -EFAULT;
switch (optname) {
case IPV6_CHECKSUM:
if (inet_sk(sk)->num == IPPROTO_ICMPV6 &&
level == IPPROTO_IPV6) {
/*
* RFC3542 tells that IPV6_CHECKSUM socket
* option in the IPPROTO_IPV6 level is not
* allowed on ICMPv6 sockets.
* If you want to set it, use IPPROTO_RAW
* level IPV6_CHECKSUM socket option
* (Linux extension).
*/
return -EINVAL;
}
/* You may get strange result with a positive odd offset;
RFC2292bis agrees with me. */
if (val > 0 && (val&1))
return(-EINVAL);
if (val < 0) {
rp->checksum = 0;
} else {
rp->checksum = 1;
rp->offset = val;
}
return 0;
break;
default:
return(-ENOPROTOOPT);
}
}
static int rawv6_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
switch(level) {
case SOL_RAW:
break;
case SOL_ICMPV6:
if (inet_sk(sk)->num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
return rawv6_seticmpfilter(sk, level, optname, optval,
optlen);
case SOL_IPV6:
if (optname == IPV6_CHECKSUM)
break;
default:
return ipv6_setsockopt(sk, level, optname, optval,
optlen);
}
return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
}
#ifdef CONFIG_COMPAT
static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
switch (level) {
case SOL_RAW:
break;
case SOL_ICMPV6:
if (inet_sk(sk)->num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
case SOL_IPV6:
if (optname == IPV6_CHECKSUM)
break;
default:
return compat_ipv6_setsockopt(sk, level, optname,
optval, optlen);
}
return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
}
#endif
static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
struct raw6_sock *rp = raw6_sk(sk);
int val, len;
if (get_user(len,optlen))
return -EFAULT;
switch (optname) {
case IPV6_CHECKSUM:
/*
* We allow getsockopt() for IPPROTO_IPV6-level
* IPV6_CHECKSUM socket option on ICMPv6 sockets
* since RFC3542 is silent about it.
*/
if (rp->checksum == 0)
val = -1;
else
val = rp->offset;
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;
}
static int rawv6_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
switch(level) {
case SOL_RAW:
break;
case SOL_ICMPV6:
if (inet_sk(sk)->num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
return rawv6_geticmpfilter(sk, level, optname, optval,
optlen);
case SOL_IPV6:
if (optname == IPV6_CHECKSUM)
break;
default:
return ipv6_getsockopt(sk, level, optname, optval,
optlen);
}
return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
}
#ifdef CONFIG_COMPAT
static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
switch (level) {
case SOL_RAW:
break;
case SOL_ICMPV6:
if (inet_sk(sk)->num != IPPROTO_ICMPV6)
return -EOPNOTSUPP;
return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
case SOL_IPV6:
if (optname == IPV6_CHECKSUM)
break;
default:
return compat_ipv6_getsockopt(sk, level, optname,
optval, optlen);
}
return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
}
#endif
static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
{
switch(cmd) {
case SIOCOUTQ:
{
int amount = atomic_read(&sk->sk_wmem_alloc);
return put_user(amount, (int __user *)arg);
}
case SIOCINQ:
{
struct sk_buff *skb;
int amount = 0;
spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
if (skb != NULL)
amount = skb->tail - skb->transport_header;
spin_unlock_bh(&sk->sk_receive_queue.lock);
return put_user(amount, (int __user *)arg);
}
default:
#ifdef CONFIG_IPV6_MROUTE
return ip6mr_ioctl(sk, cmd, (void __user *)arg);
#else
return -ENOIOCTLCMD;
#endif
}
}
static void rawv6_close(struct sock *sk, long timeout)
{
if (inet_sk(sk)->num == IPPROTO_RAW)
ip6_ra_control(sk, -1, NULL);
ip6mr_sk_done(sk);
sk_common_release(sk);
}
static int raw6_destroy(struct sock *sk)
{
lock_sock(sk);
ip6_flush_pending_frames(sk);
release_sock(sk);
return inet6_destroy_sock(sk);
}
static int rawv6_init_sk(struct sock *sk)
{
struct raw6_sock *rp = raw6_sk(sk);
switch (inet_sk(sk)->num) {
case IPPROTO_ICMPV6:
rp->checksum = 1;
rp->offset = 2;
break;
case IPPROTO_MH:
rp->checksum = 1;
rp->offset = 4;
break;
default:
break;
}
return(0);
}
struct proto rawv6_prot = {
.name = "RAWv6",
.owner = THIS_MODULE,
.close = rawv6_close,
.destroy = raw6_destroy,
.connect = ip6_datagram_connect,
.disconnect = udp_disconnect,
.ioctl = rawv6_ioctl,
.init = rawv6_init_sk,
.setsockopt = rawv6_setsockopt,
.getsockopt = rawv6_getsockopt,
.sendmsg = rawv6_sendmsg,
.recvmsg = rawv6_recvmsg,
.bind = rawv6_bind,
.backlog_rcv = rawv6_rcv_skb,
.hash = raw_hash_sk,
.unhash = raw_unhash_sk,
.obj_size = sizeof(struct raw6_sock),
.h.raw_hash = &raw_v6_hashinfo,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_rawv6_setsockopt,
.compat_getsockopt = compat_rawv6_getsockopt,
#endif
};
#ifdef CONFIG_PROC_FS
static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
{
struct ipv6_pinfo *np = inet6_sk(sp);
struct in6_addr *dest, *src;
__u16 destp, srcp;
dest = &np->daddr;
src = &np->rcv_saddr;
destp = 0;
srcp = inet_sk(sp)->num;
seq_printf(seq,
"%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
"%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
i,
src->s6_addr32[0], src->s6_addr32[1],
src->s6_addr32[2], src->s6_addr32[3], srcp,
dest->s6_addr32[0], dest->s6_addr32[1],
dest->s6_addr32[2], dest->s6_addr32[3], destp,
sp->sk_state,
atomic_read(&sp->sk_wmem_alloc),
atomic_read(&sp->sk_rmem_alloc),
0, 0L, 0,
sock_i_uid(sp), 0,
sock_i_ino(sp),
atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
}
static int raw6_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_printf(seq,
" sl "
"local_address "
"remote_address "
"st tx_queue rx_queue tr tm->when retrnsmt"
" uid timeout inode drops\n");
else
raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
return 0;
}
static const struct seq_operations raw6_seq_ops = {
.start = raw_seq_start,
.next = raw_seq_next,
.stop = raw_seq_stop,
.show = raw6_seq_show,
};
static int raw6_seq_open(struct inode *inode, struct file *file)
{
return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
}
static const struct file_operations raw6_seq_fops = {
.owner = THIS_MODULE,
.open = raw6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net,
};
static int raw6_init_net(struct net *net)
{
if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
return -ENOMEM;
return 0;
}
static void raw6_exit_net(struct net *net)
{
proc_net_remove(net, "raw6");
}
static struct pernet_operations raw6_net_ops = {
.init = raw6_init_net,
.exit = raw6_exit_net,
};
int __init raw6_proc_init(void)
{
return register_pernet_subsys(&raw6_net_ops);
}
void raw6_proc_exit(void)
{
unregister_pernet_subsys(&raw6_net_ops);
}
#endif /* CONFIG_PROC_FS */
/* Same as inet6_dgram_ops, sans udp_poll. */
static const struct proto_ops inet6_sockraw_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_dgram_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = sock_no_accept, /* a do nothing */
.getname = inet6_getname,
.poll = datagram_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
.listen = sock_no_listen, /* ok */
.shutdown = inet_shutdown, /* ok */
.setsockopt = sock_common_setsockopt, /* ok */
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
#endif
};
static struct inet_protosw rawv6_protosw = {
.type = SOCK_RAW,
.protocol = IPPROTO_IP, /* wild card */
.prot = &rawv6_prot,
.ops = &inet6_sockraw_ops,
.capability = CAP_NET_RAW,
.no_check = UDP_CSUM_DEFAULT,
.flags = INET_PROTOSW_REUSE,
};
int __init rawv6_init(void)
{
int ret;
ret = inet6_register_protosw(&rawv6_protosw);
if (ret)
goto out;
out:
return ret;
}
void rawv6_exit(void)
{
inet6_unregister_protosw(&rawv6_protosw);
}
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