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1183 lines
26 KiB
1183 lines
26 KiB
/*
|
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* RAW sockets for IPv6
|
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* Linux INET6 implementation
|
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*
|
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* Authors:
|
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* Pedro Roque <roque@di.fc.ul.pt>
|
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*
|
|
* Adapted from linux/net/ipv4/raw.c
|
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*
|
|
* $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
|
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*
|
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* Fixes:
|
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* Hideaki YOSHIFUJI : sin6_scope_id support
|
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* YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
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* Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
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*
|
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* This program is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU General Public License
|
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* as published by the Free Software Foundation; either version
|
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* 2 of the License, or (at your option) any later version.
|
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*/
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|
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
|
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#include <linux/sockios.h>
|
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#include <linux/sched.h>
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#include <linux/net.h>
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#include <linux/in6.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/icmpv6.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv6.h>
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#include <asm/uaccess.h>
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#include <asm/ioctls.h>
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#include <asm/bug.h>
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#include <net/ip.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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|
|
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#include <net/ipv6.h>
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#include <net/ndisc.h>
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#include <net/protocol.h>
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#include <net/ip6_route.h>
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#include <net/ip6_checksum.h>
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#include <net/addrconf.h>
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#include <net/transp_v6.h>
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#include <net/udp.h>
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#include <net/inet_common.h>
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|
|
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#include <net/rawv6.h>
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#include <net/xfrm.h>
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|
|
|
#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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|
|
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struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
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DEFINE_RWLOCK(raw_v6_lock);
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|
|
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static void raw_v6_hash(struct sock *sk)
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|
{
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struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
|
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(RAWV6_HTABLE_SIZE - 1)];
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|
|
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write_lock_bh(&raw_v6_lock);
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sk_add_node(sk, list);
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sock_prot_inc_use(sk->sk_prot);
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write_unlock_bh(&raw_v6_lock);
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|
}
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|
|
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static void raw_v6_unhash(struct sock *sk)
|
|
{
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write_lock_bh(&raw_v6_lock);
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if (sk_del_node_init(sk))
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sock_prot_dec_use(sk->sk_prot);
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write_unlock_bh(&raw_v6_lock);
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}
|
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|
|
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/* Grumble... icmp and ip_input want to get at this... */
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struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
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struct in6_addr *loc_addr, struct in6_addr *rmt_addr)
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|
{
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struct hlist_node *node;
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int is_multicast = ipv6_addr_is_multicast(loc_addr);
|
|
|
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sk_for_each_from(sk, node)
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if (inet_sk(sk)->num == num) {
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struct ipv6_pinfo *np = inet6_sk(sk);
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|
|
|
if (!ipv6_addr_any(&np->daddr) &&
|
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!ipv6_addr_equal(&np->daddr, rmt_addr))
|
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continue;
|
|
|
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if (!ipv6_addr_any(&np->rcv_saddr)) {
|
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if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
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goto found;
|
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if (is_multicast &&
|
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inet6_mc_check(sk, loc_addr, rmt_addr))
|
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goto found;
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|
continue;
|
|
}
|
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goto found;
|
|
}
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sk = NULL;
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found:
|
|
return sk;
|
|
}
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|
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/*
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* 0 - deliver
|
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* 1 - block
|
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*/
|
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static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
|
|
{
|
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struct icmp6hdr *icmph;
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struct raw6_sock *rp = raw6_sk(sk);
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|
|
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if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
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__u32 *data = &rp->filter.data[0];
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int bit_nr;
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|
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icmph = (struct icmp6hdr *) skb->data;
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bit_nr = icmph->icmp6_type;
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|
return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
|
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}
|
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return 0;
|
|
}
|
|
|
|
/*
|
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* demultiplex raw sockets.
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* (should consider queueing the skb in the sock receive_queue
|
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* without calling rawv6.c)
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*
|
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* Caller owns SKB so we must make clones.
|
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*/
|
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void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
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|
{
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struct in6_addr *saddr;
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struct in6_addr *daddr;
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struct sock *sk;
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__u8 hash;
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|
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saddr = &skb->nh.ipv6h->saddr;
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daddr = saddr + 1;
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hash = nexthdr & (MAX_INET_PROTOS - 1);
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|
|
read_lock(&raw_v6_lock);
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sk = sk_head(&raw_v6_htable[hash]);
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|
|
/*
|
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* The first socket found will be delivered after
|
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* delivery to transport protocols.
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*/
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|
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if (sk == NULL)
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goto out;
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sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr);
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while (sk) {
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if (nexthdr != IPPROTO_ICMPV6 || !icmpv6_filter(sk, skb)) {
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struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
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|
|
|
/* Not releasing hash table! */
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if (clone)
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rawv6_rcv(sk, clone);
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}
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sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr);
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}
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out:
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read_unlock(&raw_v6_lock);
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}
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/* This cleans up af_inet6 a bit. -DaveM */
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static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
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{
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struct inet_sock *inet = inet_sk(sk);
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
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__u32 v4addr = 0;
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int addr_type;
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int err;
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|
|
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if (addr_len < SIN6_LEN_RFC2133)
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return -EINVAL;
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addr_type = ipv6_addr_type(&addr->sin6_addr);
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|
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/* Raw sockets are IPv6 only */
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if (addr_type == IPV6_ADDR_MAPPED)
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return(-EADDRNOTAVAIL);
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lock_sock(sk);
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|
err = -EINVAL;
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|
if (sk->sk_state != TCP_CLOSE)
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|
goto out;
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|
|
|
/* Check if the address belongs to the host. */
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|
if (addr_type != IPV6_ADDR_ANY) {
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|
struct net_device *dev = NULL;
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|
|
|
if (addr_type & IPV6_ADDR_LINKLOCAL) {
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if (addr_len >= sizeof(struct sockaddr_in6) &&
|
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addr->sin6_scope_id) {
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/* Override any existing binding, if another
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* one is supplied by user.
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*/
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sk->sk_bound_dev_if = addr->sin6_scope_id;
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}
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/* Binding to link-local address requires an interface */
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if (!sk->sk_bound_dev_if)
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goto out;
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|
dev = dev_get_by_index(sk->sk_bound_dev_if);
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|
if (!dev) {
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err = -ENODEV;
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|
goto out;
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|
}
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}
|
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|
|
/* ipv4 addr of the socket is invalid. Only the
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* unspecified and mapped address have a v4 equivalent.
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*/
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v4addr = LOOPBACK4_IPV6;
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if (!(addr_type & IPV6_ADDR_MULTICAST)) {
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err = -EADDRNOTAVAIL;
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if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
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if (dev)
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dev_put(dev);
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goto out;
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}
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}
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if (dev)
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dev_put(dev);
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}
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inet->rcv_saddr = inet->saddr = v4addr;
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ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
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if (!(addr_type & IPV6_ADDR_MULTICAST))
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ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
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err = 0;
|
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out:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
void rawv6_err(struct sock *sk, struct sk_buff *skb,
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|
struct inet6_skb_parm *opt,
|
|
int type, int code, int offset, u32 info)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
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int err;
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int harderr;
|
|
|
|
/* Report error on raw socket, if:
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|
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);
|
|
}
|
|
}
|
|
|
|
static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
|
|
{
|
|
if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
|
|
skb->ip_summed != CHECKSUM_UNNECESSARY) {
|
|
if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
|
|
/* FIXME: increment a raw6 drops counter here */
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
}
|
|
|
|
/* Charge it to the socket. */
|
|
if (sock_queue_rcv_skb(sk,skb)<0) {
|
|
/* FIXME: increment a raw6 drops counter here */
|
|
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)) {
|
|
kfree_skb(skb);
|
|
return NET_RX_DROP;
|
|
}
|
|
|
|
if (!rp->checksum)
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
if (skb->ip_summed != CHECKSUM_UNNECESSARY) {
|
|
if (skb->ip_summed == CHECKSUM_HW) {
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
if (csum_ipv6_magic(&skb->nh.ipv6h->saddr,
|
|
&skb->nh.ipv6h->daddr,
|
|
skb->len, inet->num, skb->csum)) {
|
|
LIMIT_NETDEBUG(
|
|
printk(KERN_DEBUG "raw v6 hw csum failure.\n"));
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
}
|
|
}
|
|
if (skb->ip_summed == CHECKSUM_NONE)
|
|
skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
|
|
&skb->nh.ipv6h->daddr,
|
|
skb->len, inet->num, 0);
|
|
}
|
|
|
|
if (inet->hdrincl) {
|
|
if (skb->ip_summed != CHECKSUM_UNNECESSARY &&
|
|
(unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
|
|
/* FIXME: increment a raw6 drops counter here */
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
}
|
|
|
|
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->ip_summed==CHECKSUM_UNNECESSARY) {
|
|
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
|
} else if (msg->msg_flags&MSG_TRUNC) {
|
|
if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum)))
|
|
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;
|
|
ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->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:
|
|
/* Clear queue. */
|
|
if (flags&MSG_PEEK) {
|
|
int clear = 0;
|
|
spin_lock_bh(&sk->sk_receive_queue.lock);
|
|
if (skb == skb_peek(&sk->sk_receive_queue)) {
|
|
__skb_unlink(skb, &sk->sk_receive_queue);
|
|
clear = 1;
|
|
}
|
|
spin_unlock_bh(&sk->sk_receive_queue.lock);
|
|
if (clear)
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
/* Error for blocking case is chosen to masquerade
|
|
as some normal condition.
|
|
*/
|
|
err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
|
|
/* FIXME: increment a raw6 drops counter here */
|
|
goto out_free;
|
|
}
|
|
|
|
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;
|
|
u32 tmp_csum;
|
|
u16 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->nh.raw - 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->h.raw - skb->data);
|
|
if (offset >= len) {
|
|
offset -= len;
|
|
continue;
|
|
}
|
|
|
|
csum_skb = skb;
|
|
}
|
|
|
|
skb = csum_skb;
|
|
}
|
|
|
|
offset += skb->h.raw - skb->data;
|
|
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);
|
|
|
|
tmp_csum = csum_ipv6_magic(&fl->fl6_src,
|
|
&fl->fl6_dst,
|
|
total_len, fl->proto, tmp_csum);
|
|
|
|
if (tmp_csum == 0)
|
|
tmp_csum = -1;
|
|
|
|
csum = tmp_csum;
|
|
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;
|
|
unsigned int hh_len;
|
|
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;
|
|
|
|
hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
|
|
|
|
skb = sock_alloc_send_skb(sk, length+hh_len+15,
|
|
flags&MSG_DONTWAIT, &err);
|
|
if (skb == NULL)
|
|
goto error;
|
|
skb_reserve(skb, hh_len);
|
|
|
|
skb->priority = sk->sk_priority;
|
|
skb->dst = dst_clone(&rt->u.dst);
|
|
|
|
skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
|
|
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
|
|
skb->h.raw = skb->nh.raw;
|
|
err = memcpy_fromiovecend((void *)iph, from, 0, length);
|
|
if (err)
|
|
goto error_fault;
|
|
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
|
|
err = NF_HOOK(PF_INET6, NF_IP6_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(IPSTATS_MIB_OUTDISCARDS);
|
|
return err;
|
|
}
|
|
|
|
static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
|
|
{
|
|
struct iovec *iov;
|
|
u8 __user *type = NULL;
|
|
u8 __user *code = NULL;
|
|
int probed = 0;
|
|
int i;
|
|
|
|
if (!msg->msg_iov)
|
|
return;
|
|
|
|
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) {
|
|
get_user(fl->fl_icmp_type, type);
|
|
__get_user(fl->fl_icmp_code, code);
|
|
probed = 1;
|
|
}
|
|
break;
|
|
default:
|
|
probed = 1;
|
|
break;
|
|
}
|
|
if (probed)
|
|
break;
|
|
}
|
|
}
|
|
|
|
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;
|
|
u16 proto;
|
|
int err;
|
|
|
|
/* Rough check on arithmetic overflow,
|
|
better check is made in ip6_build_xmit
|
|
*/
|
|
if (len < 0)
|
|
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));
|
|
|
|
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 (ipv6_addr_any(daddr)) {
|
|
/*
|
|
* unspecified destination address
|
|
* treated as error... is this correct ?
|
|
*/
|
|
fl6_sock_release(flowlabel);
|
|
return(-EINVAL);
|
|
}
|
|
|
|
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(msg, &fl, opt, &hlimit);
|
|
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);
|
|
|
|
fl.proto = proto;
|
|
rawv6_probe_proto_opt(&fl, msg);
|
|
|
|
ipv6_addr_copy(&fl.fl6_dst, daddr);
|
|
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;
|
|
|
|
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, 0)) < 0) {
|
|
dst_release(dst);
|
|
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 = dst_metric(dst, RTAX_HOPLIMIT);
|
|
if (hlimit < 0)
|
|
hlimit = ipv6_get_hoplimit(dst->dev);
|
|
}
|
|
|
|
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, 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);
|
|
}
|
|
done:
|
|
ip6_dst_store(sk, dst,
|
|
ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
|
|
&np->daddr : NULL);
|
|
|
|
release_sock(sk);
|
|
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 rawv6_setsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int optlen)
|
|
{
|
|
struct raw6_sock *rp = raw6_sk(sk);
|
|
int val;
|
|
|
|
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);
|
|
};
|
|
|
|
if (get_user(val, (int __user *)optval))
|
|
return -EFAULT;
|
|
|
|
switch (optname) {
|
|
case IPV6_CHECKSUM:
|
|
/* 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_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct raw6_sock *rp = raw6_sk(sk);
|
|
int val, len;
|
|
|
|
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);
|
|
};
|
|
|
|
if (get_user(len,optlen))
|
|
return -EFAULT;
|
|
|
|
switch (optname) {
|
|
case IPV6_CHECKSUM:
|
|
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_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->h.raw;
|
|
spin_unlock_bh(&sk->sk_receive_queue.lock);
|
|
return put_user(amount, (int __user *)arg);
|
|
}
|
|
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
static void rawv6_close(struct sock *sk, long timeout)
|
|
{
|
|
if (inet_sk(sk)->num == IPPROTO_RAW)
|
|
ip6_ra_control(sk, -1, NULL);
|
|
|
|
sk_common_release(sk);
|
|
}
|
|
|
|
static int rawv6_init_sk(struct sock *sk)
|
|
{
|
|
if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
|
|
struct raw6_sock *rp = raw6_sk(sk);
|
|
rp->checksum = 1;
|
|
rp->offset = 2;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
struct proto rawv6_prot = {
|
|
.name = "RAWv6",
|
|
.owner = THIS_MODULE,
|
|
.close = rawv6_close,
|
|
.connect = ip6_datagram_connect,
|
|
.disconnect = udp_disconnect,
|
|
.ioctl = rawv6_ioctl,
|
|
.init = rawv6_init_sk,
|
|
.destroy = inet6_destroy_sock,
|
|
.setsockopt = rawv6_setsockopt,
|
|
.getsockopt = rawv6_getsockopt,
|
|
.sendmsg = rawv6_sendmsg,
|
|
.recvmsg = rawv6_recvmsg,
|
|
.bind = rawv6_bind,
|
|
.backlog_rcv = rawv6_rcv_skb,
|
|
.hash = raw_v6_hash,
|
|
.unhash = raw_v6_unhash,
|
|
.obj_size = sizeof(struct raw6_sock),
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
struct raw6_iter_state {
|
|
int bucket;
|
|
};
|
|
|
|
#define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
|
|
|
|
static struct sock *raw6_get_first(struct seq_file *seq)
|
|
{
|
|
struct sock *sk;
|
|
struct hlist_node *node;
|
|
struct raw6_iter_state* state = raw6_seq_private(seq);
|
|
|
|
for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
|
|
sk_for_each(sk, node, &raw_v6_htable[state->bucket])
|
|
if (sk->sk_family == PF_INET6)
|
|
goto out;
|
|
sk = NULL;
|
|
out:
|
|
return sk;
|
|
}
|
|
|
|
static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
|
|
{
|
|
struct raw6_iter_state* state = raw6_seq_private(seq);
|
|
|
|
do {
|
|
sk = sk_next(sk);
|
|
try_again:
|
|
;
|
|
} while (sk && sk->sk_family != PF_INET6);
|
|
|
|
if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
|
|
sk = sk_head(&raw_v6_htable[state->bucket]);
|
|
goto try_again;
|
|
}
|
|
return sk;
|
|
}
|
|
|
|
static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct sock *sk = raw6_get_first(seq);
|
|
if (sk)
|
|
while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
|
|
--pos;
|
|
return pos ? NULL : sk;
|
|
}
|
|
|
|
static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
read_lock(&raw_v6_lock);
|
|
return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
|
|
}
|
|
|
|
static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct sock *sk;
|
|
|
|
if (v == SEQ_START_TOKEN)
|
|
sk = raw6_get_first(seq);
|
|
else
|
|
sk = raw6_get_next(seq, v);
|
|
++*pos;
|
|
return sk;
|
|
}
|
|
|
|
static void raw6_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
read_unlock(&raw_v6_lock);
|
|
}
|
|
|
|
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\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);
|
|
}
|
|
|
|
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\n");
|
|
else
|
|
raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
|
|
return 0;
|
|
}
|
|
|
|
static struct seq_operations raw6_seq_ops = {
|
|
.start = raw6_seq_start,
|
|
.next = raw6_seq_next,
|
|
.stop = raw6_seq_stop,
|
|
.show = raw6_seq_show,
|
|
};
|
|
|
|
static int raw6_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int rc = -ENOMEM;
|
|
struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
|
|
if (!s)
|
|
goto out;
|
|
rc = seq_open(file, &raw6_seq_ops);
|
|
if (rc)
|
|
goto out_kfree;
|
|
seq = file->private_data;
|
|
seq->private = s;
|
|
memset(s, 0, sizeof(*s));
|
|
out:
|
|
return rc;
|
|
out_kfree:
|
|
kfree(s);
|
|
goto out;
|
|
}
|
|
|
|
static struct file_operations raw6_seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = raw6_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
|
|
int __init raw6_proc_init(void)
|
|
{
|
|
if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void raw6_proc_exit(void)
|
|
{
|
|
proc_net_remove("raw6");
|
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
|
|