// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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.
*
* RAW - implementation of IP "raw" sockets.
*
* Authors: Ross Biro
* Fred N. van Kempen, <[email protected]>
*
* Fixes:
* Alan Cox : verify_area() fixed up
* Alan Cox : ICMP error handling
* Alan Cox : EMSGSIZE if you send too big a packet
* Alan Cox : Now uses generic datagrams and shared
* skbuff library. No more peek crashes,
* no more backlogs
* Alan Cox : Checks sk->broadcast.
* Alan Cox : Uses skb_free_datagram/skb_copy_datagram
* Alan Cox : Raw passes ip options too
* Alan Cox : Setsocketopt added
* Alan Cox : Fixed error return for broadcasts
* Alan Cox : Removed wake_up calls
* Alan Cox : Use ttl/tos
* Alan Cox : Cleaned up old debugging
* Alan Cox : Use new kernel side addresses
* Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
* Alan Cox : BSD style RAW socket demultiplexing.
* Alan Cox : Beginnings of mrouted support.
* Alan Cox : Added IP_HDRINCL option.
* Alan Cox : Skip broadcast check if BSDism set.
* David S. Miller : New socket lookup architecture.
*/
#include <linux/types.h>
#include <linux/atomic.h>
#include <asm/byteorder.h>
#include <asm/current.h>
#include <linux/uaccess.h>
#include <asm/ioctls.h>
#include <linux/stddef.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/spinlock.h>
#include <linux/sockios.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/mroute.h>
#include <linux/netdevice.h>
#include <linux/in_route.h>
#include <linux/route.h>
#include <linux/skbuff.h>
#include <linux/igmp.h>
#include <net/net_namespace.h>
#include <net/dst.h>
#include <net/sock.h>
#include <linux/ip.h>
#include <linux/net.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/udp.h>
#include <net/raw.h>
#include <net/snmp.h>
#include <net/tcp_states.h>
#include <net/inet_common.h>
#include <net/checksum.h>
#include <net/xfrm.h>
#include <linux/rtnetlink.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/compat.h>
#include <linux/uio.h>
struct raw_frag_vec {
struct msghdr *msg;
union {
struct icmphdr icmph;
char c[1];
} hdr;
int hlen;
};
struct raw_hashinfo raw_v4_hashinfo;
EXPORT_SYMBOL_GPL(raw_v4_hashinfo);
int raw_hash_sk(struct sock *sk)
{
struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
struct hlist_head *hlist;
hlist = &h->ht[raw_hashfunc(sock_net(sk), inet_sk(sk)->inet_num)];
spin_lock(&h->lock);
sk_add_node_rcu(sk, hlist);
sock_set_flag(sk, SOCK_RCU_FREE);
spin_unlock(&h->lock);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
return 0;
}
EXPORT_SYMBOL_GPL(raw_hash_sk);
void raw_unhash_sk(struct sock *sk)
{
struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
spin_lock(&h->lock);
if (sk_del_node_init_rcu(sk))
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
spin_unlock(&h->lock);
}
EXPORT_SYMBOL_GPL(raw_unhash_sk);
bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num,
__be32 raddr, __be32 laddr, int dif, int sdif)
{
const struct inet_sock *inet = inet_sk(sk);
if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
!(inet->inet_daddr && inet->inet_daddr != raddr) &&
!(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif))
return true;
return false;
}
EXPORT_SYMBOL_GPL(raw_v4_match);
/*
* 0 - deliver
* 1 - block
*/
static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
{
struct icmphdr _hdr;
const struct icmphdr *hdr;
hdr = skb_header_pointer(skb, skb_transport_offset(skb),
sizeof(_hdr), &_hdr);
if (!hdr)
return 1;
if (hdr->type < 32) {
__u32 data = raw_sk(sk)->filter.data;
return ((1U << hdr->type) & data) != 0;
}
/* Do not block unknown ICMP types */
return 0;
}
/* IP input processing comes here for RAW socket delivery.
* Caller owns SKB, so we must make clones.
*
* RFC 1122: SHOULD pass TOS value up to the transport layer.
* -> It does. And not only TOS, but all IP header.
*/
static int raw_v4_input(struct net *net, struct sk_buff *skb,
const struct iphdr *iph, int hash)
{
int sdif = inet_sdif(skb);
struct hlist_head *hlist;
int dif = inet_iif(skb);
int delivered = 0;
struct sock *sk;
hlist = &raw_v4_hashinfo.ht[hash];
rcu_read_lock();
sk_for_each_rcu(sk, hlist) {
if (!raw_v4_match(net, sk, iph->protocol,
iph->saddr, iph->daddr, dif, sdif))
continue;
if (atomic_read(&sk->sk_rmem_alloc) >=
READ_ONCE(sk->sk_rcvbuf)) {
atomic_inc(&sk->sk_drops);
continue;
}
delivered = 1;
if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
ip_mc_sf_allow(sk, iph->daddr, iph->saddr,
skb->dev->ifindex, sdif)) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
/* Not releasing hash table! */
if (clone)
raw_rcv(sk, clone);
}
}
rcu_read_unlock();
return delivered;
}
int raw_local_deliver(struct sk_buff *skb, int protocol)
{
struct net *net = dev_net(skb->dev);
return raw_v4_input(net, skb, ip_hdr(skb),
raw_hashfunc(net, protocol));
}
static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
{
struct inet_sock *inet = inet_sk(sk);
const int type = icmp_hdr(skb)->type;
const int code = icmp_hdr(skb)->code;
int harderr = 0;
bool recverr;
int err = 0;
if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
ipv4_sk_update_pmtu(skb, sk, info);
else if (type == ICMP_REDIRECT) {
ipv4_sk_redirect(skb, sk);
return;
}
/* Report error on raw socket, if:
1. User requested ip_recverr.
2. Socket is connected (otherwise the error indication
is useless without ip_recverr and error is hard.
*/
recverr = inet_test_bit(RECVERR, sk);
if (!recverr && sk->sk_state != TCP_ESTABLISHED)
return;
switch (type) {
default:
case ICMP_TIME_EXCEEDED:
err = EHOSTUNREACH;
break;
case ICMP_SOURCE_QUENCH:
return;
case ICMP_PARAMETERPROB:
err = EPROTO;
harderr = 1;
break;
case ICMP_DEST_UNREACH:
err = EHOSTUNREACH;
if (code > NR_ICMP_UNREACH)
break;
if (code == ICMP_FRAG_NEEDED) {
harderr = READ_ONCE(inet->pmtudisc) != IP_PMTUDISC_DONT;
err = EMSGSIZE;
} else {
err = icmp_err_convert[code].errno;
harderr = icmp_err_convert[code].fatal;
}
}
if (recverr) {
const struct iphdr *iph = (const struct iphdr *)skb->data;
u8 *payload = skb->data + (iph->ihl << 2);
if (inet_test_bit(HDRINCL, sk))
payload = skb->data;
ip_icmp_error(sk, skb, err, 0, info, payload);
}
if (recverr || harderr) {
sk->sk_err = err;
sk_error_report(sk);
}
}
void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
{
struct net *net = dev_net(skb->dev);
int dif = skb->dev->ifindex;
int sdif = inet_sdif(skb);
struct hlist_head *hlist;
const struct iphdr *iph;
struct sock *sk;
int hash;
hash = raw_hashfunc(net, protocol);
hlist = &raw_v4_hashinfo.ht[hash];
rcu_read_lock();
sk_for_each_rcu(sk, hlist) {
iph = (const struct iphdr *)skb->data;
if (!raw_v4_match(net, sk, iph->protocol,
iph->daddr, iph->saddr, dif, sdif))
continue;
raw_err(sk, skb, info);
}
rcu_read_unlock();
}
static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
enum skb_drop_reason reason;
/* Charge it to the socket. */
ipv4_pktinfo_prepare(sk, skb, true);
if (sock_queue_rcv_skb_reason(sk, skb, &reason) < 0) {
sk_skb_reason_drop(sk, skb, reason);
return NET_RX_DROP;
}
return NET_RX_SUCCESS;
}
int raw_rcv(struct sock *sk, struct sk_buff *skb)
{
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
atomic_inc(&sk->sk_drops);
sk_skb_reason_drop(sk, skb, SKB_DROP_REASON_XFRM_POLICY);
return NET_RX_DROP;
}
nf_reset_ct(skb);
skb_push(skb, -skb_network_offset(skb));
raw_rcv_skb(sk, skb);
return 0;
}
static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
struct msghdr *msg, size_t length,
struct rtable **rtp, unsigned int flags,
const struct sockcm_cookie *sockc)
{
struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk);
struct iphdr *iph;
struct sk_buff *skb;
unsigned int iphlen;
int err;
struct rtable *rt = *rtp;
int hlen, tlen;
if (length > rt->dst.dev->mtu) {
ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
rt->dst.dev->mtu);
return -EMSGSIZE;
}
if (length < sizeof(struct iphdr))
return -EINVAL;
if (flags&MSG_PROBE)
goto out;
hlen = LL_RESERVED_SPACE(rt->dst.dev);
tlen = rt->dst.dev->needed_tailroom;
skb = sock_alloc_send_skb(sk,
length + hlen + tlen + 15,
flags & MSG_DONTWAIT, &err);
if (!skb)
goto error;
skb_reserve(skb, hlen);
skb->protocol = htons(ETH_P_IP);
skb->priority = READ_ONCE(sk->sk_priority);
skb->mark = sockc->mark;
skb_set_delivery_type_by_clockid(skb, sockc->transmit_time, sk->sk_clockid);
skb_dst_set(skb, &rt->dst);
*rtp = NULL;
skb_reset_network_header(skb);
iph = ip_hdr(skb);
skb_put(skb, length);
skb->ip_summed = CHECKSUM_NONE;
skb_setup_tx_timestamp(skb, sockc->tsflags);
if (flags & MSG_CONFIRM)
skb_set_dst_pending_confirm(skb, 1);
skb->transport_header = skb->network_header;
err = -EFAULT;
if (memcpy_from_msg(iph, msg, length))
goto error_free;
iphlen = iph->ihl * 4;
/*
* We don't want to modify the ip header, but we do need to
* be sure that it won't cause problems later along the network
* stack. Specifically we want to make sure that iph->ihl is a
* sane value. If ihl points beyond the length of the buffer passed
* in, reject the frame as invalid
*/
err = -EINVAL;
if (iphlen > length)
goto error_free;
if (iphlen >= sizeof(*iph)) {
if (!iph->saddr)
iph->saddr = fl4->saddr;
iph->check = 0;
iph->tot_len = htons(length);
if (!iph->id)
ip_select_ident(net, skb, NULL);
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
skb->transport_header += iphlen;
if (iph->protocol == IPPROTO_ICMP &&
length >= iphlen + sizeof(struct icmphdr))
icmp_out_count(net, ((struct icmphdr *)
skb_transport_header(skb))->type);
}
err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
net, sk, skb, NULL, rt->dst.dev,
dst_output);
if (err > 0)
err = net_xmit_errno(err);
if (err)
goto error;
out:
return 0;
error_free:
kfree_skb(skb);
error:
IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk))
err = 0;
return err;
}
static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4)
{
int err;
if (fl4->flowi4_proto != IPPROTO_ICMP)
return 0;
/* We only need the first two bytes. */
rfv->hlen = 2;
err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen);
if (err)
return err;
fl4->fl4_icmp_type = rfv->hdr.icmph.type;
fl4->fl4_icmp_code = rfv->hdr.icmph.code;
return 0;
}
static int raw_getfrag(void *from, char *to, int offset, int len, int odd,
struct sk_buff *skb)
{
struct raw_frag_vec *rfv = from;
if (offset < rfv->hlen) {
int copy = min(rfv->hlen - offset, len);
if (skb->ip_summed == CHECKSUM_PARTIAL)
memcpy(to, rfv->hdr.c + offset, copy);
else
skb->csum = csum_block_add(
skb->csum,
csum_partial_copy_nocheck(rfv->hdr.c + offset,
to, copy),
odd);
odd = 0;
offset += copy;
to += copy;
len -= copy;
if (!len)
return 0;
}
offset -= rfv->hlen;
return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
}
static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
{
struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk);
struct ipcm_cookie ipc;
struct rtable *rt = NULL;
struct flowi4 fl4;
u8 tos, scope;
int free = 0;
__be32 daddr;
__be32 saddr;
int uc_index, err;
struct ip_options_data opt_copy;
struct raw_frag_vec rfv;
int hdrincl;
err = -EMSGSIZE;
if (len > 0xFFFF)
goto out;
hdrincl = inet_test_bit(HDRINCL, sk);
/*
* Check the flags.
*/
err = -EOPNOTSUPP;
if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
goto out; /* compatibility */
/*
* Get and verify the address.
*/
if (msg->msg_namelen) {
DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name);
err = -EINVAL;
if (msg->msg_namelen < sizeof(*usin))
goto out;
if (usin->sin_family != AF_INET) {
pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
__func__, current->comm);
err = -EAFNOSUPPORT;
if (usin->sin_family)
goto out;
}
daddr = usin->sin_addr.s_addr;
/* ANK: I did not forget to get protocol from port field.
* I just do not know, who uses this weirdness.
* IP_HDRINCL is much more convenient.
*/
} else {
err = -EDESTADDRREQ;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
daddr = inet->inet_daddr;
}
ipcm_init_sk(&ipc, inet);
/* Keep backward compat */
if (hdrincl)
ipc.protocol = IPPROTO_RAW;
if (msg->msg_controllen) {
err = ip_cmsg_send(sk, msg, &ipc, false);
if (unlikely(err)) {
kfree(ipc.opt);
goto out;
}
if (ipc.opt)
free = 1;
}
saddr = ipc.addr;
ipc.addr = daddr;
if (!ipc.opt) {
struct ip_options_rcu *inet_opt;
rcu_read_lock();
inet_opt = rcu_dereference(inet->inet_opt);
if (inet_opt) {
memcpy(&opt_copy, inet_opt,
sizeof(*inet_opt) + inet_opt->opt.optlen);
ipc.opt = &opt_copy.opt;
}
rcu_read_unlock();
}
if (ipc.opt) {
err = -EINVAL;
/* Linux does not mangle headers on raw sockets,
* so that IP options + IP_HDRINCL is non-sense.
*/
if (hdrincl)
goto done;
if (ipc.opt->opt.srr) {
if (!daddr)
goto done;
daddr = ipc.opt->opt.faddr;
}
}
tos = get_rttos(&ipc, inet);
scope = ip_sendmsg_scope(inet, &ipc, msg);
uc_index = READ_ONCE(inet->uc_index);
if (ipv4_is_multicast(daddr)) {
if (!ipc.oif || netif_index_is_l3_master(sock_net(sk), ipc.oif))
ipc.oif = READ_ONCE(inet->mc_index);
if (!saddr)
saddr = READ_ONCE(inet->mc_addr);
} else if (!ipc.oif) {
ipc.oif = uc_index;
} else if (ipv4_is_lbcast(daddr) && uc_index) {
/* oif is set, packet is to local broadcast
* and uc_index is set. oif is most likely set
* by sk_bound_dev_if. If uc_index != oif check if the
* oif is an L3 master and uc_index is an L3 slave.
* If so, we want to allow the send using the uc_index.
*/
if (ipc.oif != uc_index &&
ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk),
uc_index)) {
ipc.oif = uc_index;
}
}
flowi4_init_output(&fl4, ipc.oif, ipc.sockc.mark, tos, scope,
hdrincl ? ipc.protocol : sk->sk_protocol,
inet_sk_flowi_flags(sk) |
(hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
daddr, saddr, 0, 0, sk->sk_uid);
fl4.fl4_icmp_type = 0;
fl4.fl4_icmp_code = 0;
if (!hdrincl) {
rfv.msg = msg;
rfv.hlen = 0;
err = raw_probe_proto_opt(&rfv, &fl4);
if (err)
goto done;
}
security_sk_classify_flow(sk, flowi4_to_flowi_common(&fl4));
rt = ip_route_output_flow(net, &fl4, sk);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
rt = NULL;
goto done;
}
err = -EACCES;
if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
goto done;
if (msg->msg_flags & MSG_CONFIRM)
goto do_confirm;
back_from_confirm:
if (hdrincl)
err = raw_send_hdrinc(sk, &fl4, msg, len,
&rt, msg->msg_flags, &ipc.sockc);
else {
if (!ipc.addr)
ipc.addr = fl4.daddr;
lock_sock(sk);
err = ip_append_data(sk, &fl4, raw_getfrag,
&rfv, len, 0,
&ipc, &rt, msg->msg_flags);
if (err)
ip_flush_pending_frames(sk);
else if (!(msg->msg_flags & MSG_MORE)) {
err = ip_push_pending_frames(sk, &fl4);
if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk))
err = 0;
}
release_sock(sk);
}
done:
if (free)
kfree(ipc.opt);
ip_rt_put(rt);
out:
if (err < 0)
return err;
return len;
do_confirm:
if (msg->msg_flags & MSG_PROBE)
dst_confirm_neigh(&rt->dst, &fl4.daddr);
if (!(msg->msg_flags & MSG_PROBE) || len)
goto back_from_confirm;
err = 0;
goto done;
}
static void raw_close(struct sock *sk, long timeout)
{
/*
* Raw sockets may have direct kernel references. Kill them.
*/
ip_ra_control(sk, 0, NULL);
sk_common_release(sk);
}
static void raw_destroy(struct sock *sk)
{
lock_sock(sk);
ip_flush_pending_frames(sk);
release_sock(sk);
}
/* This gets rid of all the nasties in af_inet. -DaveM */
static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
struct net *net = sock_net(sk);
u32 tb_id = RT_TABLE_LOCAL;
int ret = -EINVAL;
int chk_addr_ret;
lock_sock(sk);
if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
goto out;
if (sk->sk_bound_dev_if)
tb_id = l3mdev_fib_table_by_index(net,
sk->sk_bound_dev_if) ? : tb_id;
chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id);
ret = -EADDRNOTAVAIL;
if (!inet_addr_valid_or_nonlocal(net, inet, addr->sin_addr.s_addr,
chk_addr_ret))
goto out;
inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
inet->inet_saddr = 0; /* Use device */
sk_dst_reset(sk);
ret = 0;
out:
release_sock(sk);
return ret;
}
/*
* This should be easy, if there is something there
* we return it, otherwise we block.
*/
static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int flags, int *addr_len)
{
struct inet_sock *inet = inet_sk(sk);
size_t copied = 0;
int err = -EOPNOTSUPP;
DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
struct sk_buff *skb;
if (flags & MSG_OOB)
goto out;
if (flags & MSG_ERRQUEUE) {
err = ip_recv_error(sk, msg, len, addr_len);
goto out;
}
skb = skb_recv_datagram(sk, flags, &err);
if (!skb)
goto out;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
err = skb_copy_datagram_msg(skb, 0, msg, copied);
if (err)
goto done;
sock_recv_cmsgs(msg, sk, skb);
/* Copy the address. */
if (sin) {
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
sin->sin_port = 0;
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
*addr_len = sizeof(*sin);
}
if (inet_cmsg_flags(inet))
ip_cmsg_recv(msg, skb);
if (flags & MSG_TRUNC)
copied = skb->len;
done:
skb_free_datagram(sk, skb);
out:
if (err)
return err;
return copied;
}
static int raw_sk_init(struct sock *sk)
{
struct raw_sock *rp = raw_sk(sk);
if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
memset(&rp->filter, 0, sizeof(rp->filter));
return 0;
}
static int raw_seticmpfilter(struct sock *sk, sockptr_t optval, int optlen)
{
if (optlen > sizeof(struct icmp_filter))
optlen = sizeof(struct icmp_filter);
if (copy_from_sockptr(&raw_sk(sk)->filter, optval, optlen))
return -EFAULT;
return 0;
}
static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
{
int len, ret = -EFAULT;
if (get_user(len, optlen))
goto out;
ret = -EINVAL;
if (len < 0)
goto out;
if (len > sizeof(struct icmp_filter))
len = sizeof(struct icmp_filter);
ret = -EFAULT;
if (put_user(len, optlen) ||
copy_to_user(optval, &raw_sk(sk)->filter, len))
goto out;
ret = 0;
out: return ret;
}
static int do_raw_setsockopt(struct sock *sk, int optname,
sockptr_t optval, unsigned int optlen)
{
if (optname == ICMP_FILTER) {
if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
return -EOPNOTSUPP;
else
return raw_seticmpfilter(sk, optval, optlen);
}
return -ENOPROTOOPT;
}
static int raw_setsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen)
{
if (level != SOL_RAW)
return ip_setsockopt(sk, level, optname, optval, optlen);
return do_raw_setsockopt(sk, optname, optval, optlen);
}
static int do_raw_getsockopt(struct sock *sk, int optname,
char __user *optval, int __user *optlen)
{
if (optname == ICMP_FILTER) {
if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
return -EOPNOTSUPP;
else
return raw_geticmpfilter(sk, optval, optlen);
}
return -ENOPROTOOPT;
}
static int raw_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
if (level != SOL_RAW)
return ip_getsockopt(sk, level, optname, optval, optlen);
return do_raw_getsockopt(sk, optname, optval, optlen);
}
static int raw_ioctl(struct sock *sk, int cmd, int *karg)
{
switch (cmd) {
case SIOCOUTQ: {
*karg = sk_wmem_alloc_get(sk);
return 0;
}
case SIOCINQ: {
struct sk_buff *skb;
spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
*karg = skb->len;
else
*karg = 0;
spin_unlock_bh(&sk->sk_receive_queue.lock);
return 0;
}
default:
#ifdef CONFIG_IP_MROUTE
return ipmr_ioctl(sk, cmd, karg);
#else
return -ENOIOCTLCMD;
#endif
}
}
#ifdef CONFIG_COMPAT
static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case SIOCOUTQ:
case SIOCINQ:
return -ENOIOCTLCMD;
default:
#ifdef CONFIG_IP_MROUTE
return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
#else
return -ENOIOCTLCMD;
#endif
}
}
#endif
int raw_abort(struct sock *sk, int err)
{
lock_sock(sk);
sk->sk_err = err;
sk_error_report(sk);
__udp_disconnect(sk, 0);
release_sock(sk);
return 0;
}
EXPORT_SYMBOL_GPL(raw_abort);
struct proto raw_prot = {
.name = "RAW",
.owner = THIS_MODULE,
.close = raw_close,
.destroy = raw_destroy,
.connect = ip4_datagram_connect,
.disconnect = __udp_disconnect,
.ioctl = raw_ioctl,
.init = raw_sk_init,
.setsockopt = raw_setsockopt,
.getsockopt = raw_getsockopt,
.sendmsg = raw_sendmsg,
.recvmsg = raw_recvmsg,
.bind = raw_bind,
.backlog_rcv = raw_rcv_skb,
.release_cb = ip4_datagram_release_cb,
.hash = raw_hash_sk,
.unhash = raw_unhash_sk,
.obj_size = sizeof(struct raw_sock),
.useroffset = offsetof(struct raw_sock, filter),
.usersize = sizeof_field(struct raw_sock, filter),
.h.raw_hash = &raw_v4_hashinfo,
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_raw_ioctl,
#endif
.diag_destroy = raw_abort,
};
#ifdef CONFIG_PROC_FS
static struct sock *raw_get_first(struct seq_file *seq, int bucket)
{
struct raw_hashinfo *h = pde_data(file_inode(seq->file));
struct raw_iter_state *state = raw_seq_private(seq);
struct hlist_head *hlist;
struct sock *sk;
for (state->bucket = bucket; state->bucket < RAW_HTABLE_SIZE;
++state->bucket) {
hlist = &h->ht[state->bucket];
sk_for_each(sk, hlist) {
if (sock_net(sk) == seq_file_net(seq))
return sk;
}
}
return NULL;
}
static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
{
struct raw_iter_state *state = raw_seq_private(seq);
do {
sk = sk_next(sk);
} while (sk && sock_net(sk) != seq_file_net(seq));
if (!sk)
return raw_get_first(seq, state->bucket + 1);
return sk;
}
static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
{
struct sock *sk = raw_get_first(seq, 0);
if (sk)
while (pos && (sk = raw_get_next(seq, sk)) != NULL)
--pos;
return pos ? NULL : sk;
}
void *raw_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(&h->lock)
{
struct raw_hashinfo *h = pde_data(file_inode(seq->file));
spin_lock(&h->lock);
return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
}
EXPORT_SYMBOL_GPL(raw_seq_start);
void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct sock *sk;
if (v == SEQ_START_TOKEN)
sk = raw_get_first(seq, 0);
else
sk = raw_get_next(seq, v);
++*pos;
return sk;
}
EXPORT_SYMBOL_GPL(raw_seq_next);
void raw_seq_stop(struct seq_file *seq, void *v)
__releases(&h->lock)
{
struct raw_hashinfo *h = pde_data(file_inode(seq->file));
spin_unlock(&h->lock);
}
EXPORT_SYMBOL_GPL(raw_seq_stop);
static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
{
struct inet_sock *inet = inet_sk(sp);
__be32 dest = inet->inet_daddr,
src = inet->inet_rcv_saddr;
__u16 destp = 0,
srcp = inet->inet_num;
seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
" %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",
i, src, srcp, dest, destp, sp->sk_state,
sk_wmem_alloc_get(sp),
sk_rmem_alloc_get(sp),
0, 0L, 0,
from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
0, sock_i_ino(sp),
refcount_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
}
static int raw_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_printf(seq, " sl local_address rem_address st tx_queue "
"rx_queue tr tm->when retrnsmt uid timeout "
"inode ref pointer drops\n");
else
raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
return 0;
}
static const struct seq_operations raw_seq_ops = {
.start = raw_seq_start,
.next = raw_seq_next,
.stop = raw_seq_stop,
.show = raw_seq_show,
};
static __net_init int raw_init_net(struct net *net)
{
if (!proc_create_net_data("raw", 0444, net->proc_net, &raw_seq_ops,
sizeof(struct raw_iter_state), &raw_v4_hashinfo))
return -ENOMEM;
return 0;
}
static __net_exit void raw_exit_net(struct net *net)
{
remove_proc_entry("raw", net->proc_net);
}
static __net_initdata struct pernet_operations raw_net_ops = {
.init = raw_init_net,
.exit = raw_exit_net,
};
int __init raw_proc_init(void)
{
return register_pernet_subsys(&raw_net_ops);
}
void __init raw_proc_exit(void)
{
unregister_pernet_subsys(&raw_net_ops);
}
#endif /* CONFIG_PROC_FS */
static void raw_sysctl_init_net(struct net *net)
{
#ifdef CONFIG_NET_L3_MASTER_DEV
net->ipv4.sysctl_raw_l3mdev_accept = 1;
#endif
}
static int __net_init raw_sysctl_init(struct net *net)
{
raw_sysctl_init_net(net);
return 0;
}
static struct pernet_operations __net_initdata raw_sysctl_ops = {
.init = raw_sysctl_init,
};
void __init raw_init(void)
{
raw_sysctl_init_net(&init_net);
if (register_pernet_subsys(&raw_sysctl_ops))
panic("RAW: failed to init sysctl parameters.\n");
}
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