forked from Minki/linux
1290 lines
27 KiB
C
1290 lines
27 KiB
C
/*
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* IPv6 BSD socket options interface
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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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*
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* Based on linux/net/ipv4/ip_sockglue.c
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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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* FIXME: Make the setsockopt code POSIX compliant: That is
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*
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* o Truncate getsockopt returns
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* o Return an optlen of the truncated length if need be
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*
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* Changes:
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* David L Stevens <dlstevens@us.ibm.com>:
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* - added multicast source filtering API for MLDv2
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*/
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#include <linux/module.h>
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#include <linux/capability.h>
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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/net.h>
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#include <linux/in6.h>
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#include <linux/mroute6.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/init.h>
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#include <linux/sysctl.h>
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#include <linux/netfilter.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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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/transp_v6.h>
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#include <net/ip6_route.h>
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#include <net/addrconf.h>
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#include <net/inet_common.h>
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#include <net/tcp.h>
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#include <net/udp.h>
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#include <net/udplite.h>
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#include <net/xfrm.h>
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#include <net/compat.h>
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#include <asm/uaccess.h>
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struct ip6_ra_chain *ip6_ra_chain;
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DEFINE_RWLOCK(ip6_ra_lock);
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int ip6_ra_control(struct sock *sk, int sel)
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{
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struct ip6_ra_chain *ra, *new_ra, **rap;
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/* RA packet may be delivered ONLY to IPPROTO_RAW socket */
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if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
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return -ENOPROTOOPT;
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new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
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write_lock_bh(&ip6_ra_lock);
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for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
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if (ra->sk == sk) {
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if (sel>=0) {
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write_unlock_bh(&ip6_ra_lock);
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kfree(new_ra);
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return -EADDRINUSE;
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}
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*rap = ra->next;
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write_unlock_bh(&ip6_ra_lock);
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sock_put(sk);
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kfree(ra);
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return 0;
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}
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}
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if (new_ra == NULL) {
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write_unlock_bh(&ip6_ra_lock);
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return -ENOBUFS;
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}
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new_ra->sk = sk;
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new_ra->sel = sel;
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new_ra->next = ra;
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*rap = new_ra;
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sock_hold(sk);
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write_unlock_bh(&ip6_ra_lock);
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return 0;
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}
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static
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struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
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struct ipv6_txoptions *opt)
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{
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if (inet_sk(sk)->is_icsk) {
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if (opt &&
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!((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
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inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
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struct inet_connection_sock *icsk = inet_csk(sk);
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icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
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icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
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}
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opt = xchg(&inet6_sk(sk)->opt, opt);
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} else {
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spin_lock(&sk->sk_dst_lock);
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opt = xchg(&inet6_sk(sk)->opt, opt);
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spin_unlock(&sk->sk_dst_lock);
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}
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sk_dst_reset(sk);
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return opt;
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}
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static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
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char __user *optval, unsigned int optlen)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct net *net = sock_net(sk);
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int val, valbool;
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int retv = -ENOPROTOOPT;
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if (optval == NULL)
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val=0;
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else {
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if (optlen >= sizeof(int)) {
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if (get_user(val, (int __user *) optval))
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return -EFAULT;
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} else
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val = 0;
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}
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valbool = (val!=0);
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if (ip6_mroute_opt(optname))
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return ip6_mroute_setsockopt(sk, optname, optval, optlen);
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lock_sock(sk);
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switch (optname) {
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case IPV6_ADDRFORM:
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if (optlen < sizeof(int))
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goto e_inval;
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if (val == PF_INET) {
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struct ipv6_txoptions *opt;
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struct sk_buff *pktopt;
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if (sk->sk_type == SOCK_RAW)
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break;
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if (sk->sk_protocol == IPPROTO_UDP ||
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sk->sk_protocol == IPPROTO_UDPLITE) {
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struct udp_sock *up = udp_sk(sk);
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if (up->pending == AF_INET6) {
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retv = -EBUSY;
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break;
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}
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} else if (sk->sk_protocol != IPPROTO_TCP)
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break;
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if (sk->sk_state != TCP_ESTABLISHED) {
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retv = -ENOTCONN;
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break;
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}
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if (ipv6_only_sock(sk) ||
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!ipv6_addr_v4mapped(&np->daddr)) {
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retv = -EADDRNOTAVAIL;
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break;
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}
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fl6_free_socklist(sk);
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ipv6_sock_mc_close(sk);
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/*
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* Sock is moving from IPv6 to IPv4 (sk_prot), so
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* remove it from the refcnt debug socks count in the
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* original family...
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*/
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sk_refcnt_debug_dec(sk);
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if (sk->sk_protocol == IPPROTO_TCP) {
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struct inet_connection_sock *icsk = inet_csk(sk);
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local_bh_disable();
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sock_prot_inuse_add(net, sk->sk_prot, -1);
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sock_prot_inuse_add(net, &tcp_prot, 1);
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local_bh_enable();
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sk->sk_prot = &tcp_prot;
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icsk->icsk_af_ops = &ipv4_specific;
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sk->sk_socket->ops = &inet_stream_ops;
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sk->sk_family = PF_INET;
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tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
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} else {
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struct proto *prot = &udp_prot;
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if (sk->sk_protocol == IPPROTO_UDPLITE)
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prot = &udplite_prot;
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local_bh_disable();
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sock_prot_inuse_add(net, sk->sk_prot, -1);
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sock_prot_inuse_add(net, prot, 1);
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local_bh_enable();
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sk->sk_prot = prot;
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sk->sk_socket->ops = &inet_dgram_ops;
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sk->sk_family = PF_INET;
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}
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opt = xchg(&np->opt, NULL);
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if (opt)
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sock_kfree_s(sk, opt, opt->tot_len);
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pktopt = xchg(&np->pktoptions, NULL);
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kfree_skb(pktopt);
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sk->sk_destruct = inet_sock_destruct;
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/*
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* ... and add it to the refcnt debug socks count
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* in the new family. -acme
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*/
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sk_refcnt_debug_inc(sk);
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module_put(THIS_MODULE);
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retv = 0;
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break;
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}
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goto e_inval;
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case IPV6_V6ONLY:
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if (optlen < sizeof(int) ||
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inet_sk(sk)->inet_num)
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goto e_inval;
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np->ipv6only = valbool;
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retv = 0;
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break;
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case IPV6_RECVPKTINFO:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.rxinfo = valbool;
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retv = 0;
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break;
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case IPV6_2292PKTINFO:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.rxoinfo = valbool;
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retv = 0;
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break;
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case IPV6_RECVHOPLIMIT:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.rxhlim = valbool;
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retv = 0;
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break;
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case IPV6_2292HOPLIMIT:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.rxohlim = valbool;
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retv = 0;
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break;
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case IPV6_RECVRTHDR:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.srcrt = valbool;
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retv = 0;
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break;
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case IPV6_2292RTHDR:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.osrcrt = valbool;
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retv = 0;
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break;
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case IPV6_RECVHOPOPTS:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.hopopts = valbool;
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retv = 0;
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break;
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case IPV6_2292HOPOPTS:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.ohopopts = valbool;
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retv = 0;
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break;
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case IPV6_RECVDSTOPTS:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.dstopts = valbool;
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retv = 0;
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break;
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case IPV6_2292DSTOPTS:
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if (optlen < sizeof(int))
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goto e_inval;
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np->rxopt.bits.odstopts = valbool;
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retv = 0;
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break;
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|
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case IPV6_TCLASS:
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if (optlen < sizeof(int))
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goto e_inval;
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if (val < -1 || val > 0xff)
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goto e_inval;
|
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/* RFC 3542, 6.5: default traffic class of 0x0 */
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if (val == -1)
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val = 0;
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np->tclass = val;
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retv = 0;
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break;
|
|
|
|
case IPV6_RECVTCLASS:
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if (optlen < sizeof(int))
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|
goto e_inval;
|
|
np->rxopt.bits.rxtclass = valbool;
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|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_FLOWINFO:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
np->rxopt.bits.rxflow = valbool;
|
|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_RECVPATHMTU:
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if (optlen < sizeof(int))
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|
goto e_inval;
|
|
np->rxopt.bits.rxpmtu = valbool;
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|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_TRANSPARENT:
|
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if (!capable(CAP_NET_ADMIN)) {
|
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retv = -EPERM;
|
|
break;
|
|
}
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
/* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
|
|
inet_sk(sk)->transparent = valbool;
|
|
retv = 0;
|
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break;
|
|
|
|
case IPV6_RECVORIGDSTADDR:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
np->rxopt.bits.rxorigdstaddr = valbool;
|
|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_HOPOPTS:
|
|
case IPV6_RTHDRDSTOPTS:
|
|
case IPV6_RTHDR:
|
|
case IPV6_DSTOPTS:
|
|
{
|
|
struct ipv6_txoptions *opt;
|
|
|
|
/* remove any sticky options header with a zero option
|
|
* length, per RFC3542.
|
|
*/
|
|
if (optlen == 0)
|
|
optval = NULL;
|
|
else if (optval == NULL)
|
|
goto e_inval;
|
|
else if (optlen < sizeof(struct ipv6_opt_hdr) ||
|
|
optlen & 0x7 || optlen > 8 * 255)
|
|
goto e_inval;
|
|
|
|
/* hop-by-hop / destination options are privileged option */
|
|
retv = -EPERM;
|
|
if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
|
|
break;
|
|
|
|
opt = ipv6_renew_options(sk, np->opt, optname,
|
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(struct ipv6_opt_hdr __user *)optval,
|
|
optlen);
|
|
if (IS_ERR(opt)) {
|
|
retv = PTR_ERR(opt);
|
|
break;
|
|
}
|
|
|
|
/* routing header option needs extra check */
|
|
retv = -EINVAL;
|
|
if (optname == IPV6_RTHDR && opt && opt->srcrt) {
|
|
struct ipv6_rt_hdr *rthdr = opt->srcrt;
|
|
switch (rthdr->type) {
|
|
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
|
|
case IPV6_SRCRT_TYPE_2:
|
|
if (rthdr->hdrlen != 2 ||
|
|
rthdr->segments_left != 1)
|
|
goto sticky_done;
|
|
|
|
break;
|
|
#endif
|
|
default:
|
|
goto sticky_done;
|
|
}
|
|
}
|
|
|
|
retv = 0;
|
|
opt = ipv6_update_options(sk, opt);
|
|
sticky_done:
|
|
if (opt)
|
|
sock_kfree_s(sk, opt, opt->tot_len);
|
|
break;
|
|
}
|
|
|
|
case IPV6_PKTINFO:
|
|
{
|
|
struct in6_pktinfo pkt;
|
|
|
|
if (optlen == 0)
|
|
goto e_inval;
|
|
else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
|
|
goto e_inval;
|
|
|
|
if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
|
|
retv = -EFAULT;
|
|
break;
|
|
}
|
|
if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
|
|
goto e_inval;
|
|
|
|
np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
|
|
ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr);
|
|
retv = 0;
|
|
break;
|
|
}
|
|
|
|
case IPV6_2292PKTOPTIONS:
|
|
{
|
|
struct ipv6_txoptions *opt = NULL;
|
|
struct msghdr msg;
|
|
struct flowi6 fl6;
|
|
int junk;
|
|
|
|
memset(&fl6, 0, sizeof(fl6));
|
|
fl6.flowi6_oif = sk->sk_bound_dev_if;
|
|
fl6.flowi6_mark = sk->sk_mark;
|
|
|
|
if (optlen == 0)
|
|
goto update;
|
|
|
|
/* 1K is probably excessive
|
|
* 1K is surely not enough, 2K per standard header is 16K.
|
|
*/
|
|
retv = -EINVAL;
|
|
if (optlen > 64*1024)
|
|
break;
|
|
|
|
opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
|
|
retv = -ENOBUFS;
|
|
if (opt == NULL)
|
|
break;
|
|
|
|
memset(opt, 0, sizeof(*opt));
|
|
opt->tot_len = sizeof(*opt) + optlen;
|
|
retv = -EFAULT;
|
|
if (copy_from_user(opt+1, optval, optlen))
|
|
goto done;
|
|
|
|
msg.msg_controllen = optlen;
|
|
msg.msg_control = (void*)(opt+1);
|
|
|
|
retv = datagram_send_ctl(net, &msg, &fl6, opt, &junk, &junk,
|
|
&junk);
|
|
if (retv)
|
|
goto done;
|
|
update:
|
|
retv = 0;
|
|
opt = ipv6_update_options(sk, opt);
|
|
done:
|
|
if (opt)
|
|
sock_kfree_s(sk, opt, opt->tot_len);
|
|
break;
|
|
}
|
|
case IPV6_UNICAST_HOPS:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
if (val > 255 || val < -1)
|
|
goto e_inval;
|
|
np->hop_limit = val;
|
|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_MULTICAST_HOPS:
|
|
if (sk->sk_type == SOCK_STREAM)
|
|
break;
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
if (val > 255 || val < -1)
|
|
goto e_inval;
|
|
np->mcast_hops = val;
|
|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_MULTICAST_LOOP:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
if (val != valbool)
|
|
goto e_inval;
|
|
np->mc_loop = valbool;
|
|
retv = 0;
|
|
break;
|
|
|
|
case IPV6_MULTICAST_IF:
|
|
if (sk->sk_type == SOCK_STREAM)
|
|
break;
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
|
|
if (val) {
|
|
struct net_device *dev;
|
|
|
|
if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
|
|
goto e_inval;
|
|
|
|
dev = dev_get_by_index(net, val);
|
|
if (!dev) {
|
|
retv = -ENODEV;
|
|
break;
|
|
}
|
|
dev_put(dev);
|
|
}
|
|
np->mcast_oif = val;
|
|
retv = 0;
|
|
break;
|
|
case IPV6_ADD_MEMBERSHIP:
|
|
case IPV6_DROP_MEMBERSHIP:
|
|
{
|
|
struct ipv6_mreq mreq;
|
|
|
|
if (optlen < sizeof(struct ipv6_mreq))
|
|
goto e_inval;
|
|
|
|
retv = -EPROTO;
|
|
if (inet_sk(sk)->is_icsk)
|
|
break;
|
|
|
|
retv = -EFAULT;
|
|
if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
|
|
break;
|
|
|
|
if (optname == IPV6_ADD_MEMBERSHIP)
|
|
retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
|
|
else
|
|
retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
|
|
break;
|
|
}
|
|
case IPV6_JOIN_ANYCAST:
|
|
case IPV6_LEAVE_ANYCAST:
|
|
{
|
|
struct ipv6_mreq mreq;
|
|
|
|
if (optlen < sizeof(struct ipv6_mreq))
|
|
goto e_inval;
|
|
|
|
retv = -EFAULT;
|
|
if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
|
|
break;
|
|
|
|
if (optname == IPV6_JOIN_ANYCAST)
|
|
retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
|
|
else
|
|
retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
|
|
break;
|
|
}
|
|
case MCAST_JOIN_GROUP:
|
|
case MCAST_LEAVE_GROUP:
|
|
{
|
|
struct group_req greq;
|
|
struct sockaddr_in6 *psin6;
|
|
|
|
if (optlen < sizeof(struct group_req))
|
|
goto e_inval;
|
|
|
|
retv = -EFAULT;
|
|
if (copy_from_user(&greq, optval, sizeof(struct group_req)))
|
|
break;
|
|
if (greq.gr_group.ss_family != AF_INET6) {
|
|
retv = -EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
psin6 = (struct sockaddr_in6 *)&greq.gr_group;
|
|
if (optname == MCAST_JOIN_GROUP)
|
|
retv = ipv6_sock_mc_join(sk, greq.gr_interface,
|
|
&psin6->sin6_addr);
|
|
else
|
|
retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
|
|
&psin6->sin6_addr);
|
|
break;
|
|
}
|
|
case MCAST_JOIN_SOURCE_GROUP:
|
|
case MCAST_LEAVE_SOURCE_GROUP:
|
|
case MCAST_BLOCK_SOURCE:
|
|
case MCAST_UNBLOCK_SOURCE:
|
|
{
|
|
struct group_source_req greqs;
|
|
int omode, add;
|
|
|
|
if (optlen < sizeof(struct group_source_req))
|
|
goto e_inval;
|
|
if (copy_from_user(&greqs, optval, sizeof(greqs))) {
|
|
retv = -EFAULT;
|
|
break;
|
|
}
|
|
if (greqs.gsr_group.ss_family != AF_INET6 ||
|
|
greqs.gsr_source.ss_family != AF_INET6) {
|
|
retv = -EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
if (optname == MCAST_BLOCK_SOURCE) {
|
|
omode = MCAST_EXCLUDE;
|
|
add = 1;
|
|
} else if (optname == MCAST_UNBLOCK_SOURCE) {
|
|
omode = MCAST_EXCLUDE;
|
|
add = 0;
|
|
} else if (optname == MCAST_JOIN_SOURCE_GROUP) {
|
|
struct sockaddr_in6 *psin6;
|
|
|
|
psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
|
|
retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
|
|
&psin6->sin6_addr);
|
|
/* prior join w/ different source is ok */
|
|
if (retv && retv != -EADDRINUSE)
|
|
break;
|
|
omode = MCAST_INCLUDE;
|
|
add = 1;
|
|
} else /* MCAST_LEAVE_SOURCE_GROUP */ {
|
|
omode = MCAST_INCLUDE;
|
|
add = 0;
|
|
}
|
|
retv = ip6_mc_source(add, omode, sk, &greqs);
|
|
break;
|
|
}
|
|
case MCAST_MSFILTER:
|
|
{
|
|
extern int sysctl_mld_max_msf;
|
|
struct group_filter *gsf;
|
|
|
|
if (optlen < GROUP_FILTER_SIZE(0))
|
|
goto e_inval;
|
|
if (optlen > sysctl_optmem_max) {
|
|
retv = -ENOBUFS;
|
|
break;
|
|
}
|
|
gsf = kmalloc(optlen,GFP_KERNEL);
|
|
if (!gsf) {
|
|
retv = -ENOBUFS;
|
|
break;
|
|
}
|
|
retv = -EFAULT;
|
|
if (copy_from_user(gsf, optval, optlen)) {
|
|
kfree(gsf);
|
|
break;
|
|
}
|
|
/* numsrc >= (4G-140)/128 overflow in 32 bits */
|
|
if (gsf->gf_numsrc >= 0x1ffffffU ||
|
|
gsf->gf_numsrc > sysctl_mld_max_msf) {
|
|
kfree(gsf);
|
|
retv = -ENOBUFS;
|
|
break;
|
|
}
|
|
if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
|
|
kfree(gsf);
|
|
retv = -EINVAL;
|
|
break;
|
|
}
|
|
retv = ip6_mc_msfilter(sk, gsf);
|
|
kfree(gsf);
|
|
|
|
break;
|
|
}
|
|
case IPV6_ROUTER_ALERT:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
retv = ip6_ra_control(sk, val);
|
|
break;
|
|
case IPV6_MTU_DISCOVER:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
|
|
goto e_inval;
|
|
np->pmtudisc = val;
|
|
retv = 0;
|
|
break;
|
|
case IPV6_MTU:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
if (val && val < IPV6_MIN_MTU)
|
|
goto e_inval;
|
|
np->frag_size = val;
|
|
retv = 0;
|
|
break;
|
|
case IPV6_RECVERR:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
np->recverr = valbool;
|
|
if (!val)
|
|
skb_queue_purge(&sk->sk_error_queue);
|
|
retv = 0;
|
|
break;
|
|
case IPV6_FLOWINFO_SEND:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
np->sndflow = valbool;
|
|
retv = 0;
|
|
break;
|
|
case IPV6_FLOWLABEL_MGR:
|
|
retv = ipv6_flowlabel_opt(sk, optval, optlen);
|
|
break;
|
|
case IPV6_IPSEC_POLICY:
|
|
case IPV6_XFRM_POLICY:
|
|
retv = -EPERM;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
break;
|
|
retv = xfrm_user_policy(sk, optname, optval, optlen);
|
|
break;
|
|
|
|
case IPV6_ADDR_PREFERENCES:
|
|
{
|
|
unsigned int pref = 0;
|
|
unsigned int prefmask = ~0;
|
|
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
|
|
retv = -EINVAL;
|
|
|
|
/* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
|
|
switch (val & (IPV6_PREFER_SRC_PUBLIC|
|
|
IPV6_PREFER_SRC_TMP|
|
|
IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
|
|
case IPV6_PREFER_SRC_PUBLIC:
|
|
pref |= IPV6_PREFER_SRC_PUBLIC;
|
|
break;
|
|
case IPV6_PREFER_SRC_TMP:
|
|
pref |= IPV6_PREFER_SRC_TMP;
|
|
break;
|
|
case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
|
|
break;
|
|
case 0:
|
|
goto pref_skip_pubtmp;
|
|
default:
|
|
goto e_inval;
|
|
}
|
|
|
|
prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
|
|
IPV6_PREFER_SRC_TMP);
|
|
pref_skip_pubtmp:
|
|
|
|
/* check HOME/COA conflicts */
|
|
switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
|
|
case IPV6_PREFER_SRC_HOME:
|
|
break;
|
|
case IPV6_PREFER_SRC_COA:
|
|
pref |= IPV6_PREFER_SRC_COA;
|
|
case 0:
|
|
goto pref_skip_coa;
|
|
default:
|
|
goto e_inval;
|
|
}
|
|
|
|
prefmask &= ~IPV6_PREFER_SRC_COA;
|
|
pref_skip_coa:
|
|
|
|
/* check CGA/NONCGA conflicts */
|
|
switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
|
|
case IPV6_PREFER_SRC_CGA:
|
|
case IPV6_PREFER_SRC_NONCGA:
|
|
case 0:
|
|
break;
|
|
default:
|
|
goto e_inval;
|
|
}
|
|
|
|
np->srcprefs = (np->srcprefs & prefmask) | pref;
|
|
retv = 0;
|
|
|
|
break;
|
|
}
|
|
case IPV6_MINHOPCOUNT:
|
|
if (optlen < sizeof(int))
|
|
goto e_inval;
|
|
if (val < 0 || val > 255)
|
|
goto e_inval;
|
|
np->min_hopcount = val;
|
|
break;
|
|
case IPV6_DONTFRAG:
|
|
np->dontfrag = valbool;
|
|
retv = 0;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
return retv;
|
|
|
|
e_inval:
|
|
release_sock(sk);
|
|
return -EINVAL;
|
|
}
|
|
|
|
int ipv6_setsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
int err;
|
|
|
|
if (level == SOL_IP && sk->sk_type != SOCK_RAW)
|
|
return udp_prot.setsockopt(sk, level, optname, optval, optlen);
|
|
|
|
if (level != SOL_IPV6)
|
|
return -ENOPROTOOPT;
|
|
|
|
err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
|
|
optname != IPV6_XFRM_POLICY) {
|
|
lock_sock(sk);
|
|
err = nf_setsockopt(sk, PF_INET6, optname, optval,
|
|
optlen);
|
|
release_sock(sk);
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ipv6_setsockopt);
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
int err;
|
|
|
|
if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
|
|
if (udp_prot.compat_setsockopt != NULL)
|
|
return udp_prot.compat_setsockopt(sk, level, optname,
|
|
optval, optlen);
|
|
return udp_prot.setsockopt(sk, level, optname, optval, optlen);
|
|
}
|
|
|
|
if (level != SOL_IPV6)
|
|
return -ENOPROTOOPT;
|
|
|
|
if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
|
|
return compat_mc_setsockopt(sk, level, optname, optval, optlen,
|
|
ipv6_setsockopt);
|
|
|
|
err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
|
|
optname != IPV6_XFRM_POLICY) {
|
|
lock_sock(sk);
|
|
err = compat_nf_setsockopt(sk, PF_INET6, optname,
|
|
optval, optlen);
|
|
release_sock(sk);
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(compat_ipv6_setsockopt);
|
|
#endif
|
|
|
|
static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
|
|
int optname, char __user *optval, int len)
|
|
{
|
|
struct ipv6_opt_hdr *hdr;
|
|
|
|
if (!opt)
|
|
return 0;
|
|
|
|
switch(optname) {
|
|
case IPV6_HOPOPTS:
|
|
hdr = opt->hopopt;
|
|
break;
|
|
case IPV6_RTHDRDSTOPTS:
|
|
hdr = opt->dst0opt;
|
|
break;
|
|
case IPV6_RTHDR:
|
|
hdr = (struct ipv6_opt_hdr *)opt->srcrt;
|
|
break;
|
|
case IPV6_DSTOPTS:
|
|
hdr = opt->dst1opt;
|
|
break;
|
|
default:
|
|
return -EINVAL; /* should not happen */
|
|
}
|
|
|
|
if (!hdr)
|
|
return 0;
|
|
|
|
len = min_t(unsigned int, len, ipv6_optlen(hdr));
|
|
if (copy_to_user(optval, hdr, len))
|
|
return -EFAULT;
|
|
return len;
|
|
}
|
|
|
|
static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
int len;
|
|
int val;
|
|
|
|
if (ip6_mroute_opt(optname))
|
|
return ip6_mroute_getsockopt(sk, optname, optval, optlen);
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
switch (optname) {
|
|
case IPV6_ADDRFORM:
|
|
if (sk->sk_protocol != IPPROTO_UDP &&
|
|
sk->sk_protocol != IPPROTO_UDPLITE &&
|
|
sk->sk_protocol != IPPROTO_TCP)
|
|
return -ENOPROTOOPT;
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
|
return -ENOTCONN;
|
|
val = sk->sk_family;
|
|
break;
|
|
case MCAST_MSFILTER:
|
|
{
|
|
struct group_filter gsf;
|
|
int err;
|
|
|
|
if (len < GROUP_FILTER_SIZE(0))
|
|
return -EINVAL;
|
|
if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
|
|
return -EFAULT;
|
|
if (gsf.gf_group.ss_family != AF_INET6)
|
|
return -EADDRNOTAVAIL;
|
|
lock_sock(sk);
|
|
err = ip6_mc_msfget(sk, &gsf,
|
|
(struct group_filter __user *)optval, optlen);
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
case IPV6_2292PKTOPTIONS:
|
|
{
|
|
struct msghdr msg;
|
|
struct sk_buff *skb;
|
|
|
|
if (sk->sk_type != SOCK_STREAM)
|
|
return -ENOPROTOOPT;
|
|
|
|
msg.msg_control = optval;
|
|
msg.msg_controllen = len;
|
|
msg.msg_flags = 0;
|
|
|
|
lock_sock(sk);
|
|
skb = np->pktoptions;
|
|
if (skb)
|
|
atomic_inc(&skb->users);
|
|
release_sock(sk);
|
|
|
|
if (skb) {
|
|
int err = datagram_recv_ctl(sk, &msg, skb);
|
|
kfree_skb(skb);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
if (np->rxopt.bits.rxinfo) {
|
|
struct in6_pktinfo src_info;
|
|
src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
|
|
np->sticky_pktinfo.ipi6_ifindex;
|
|
np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
|
|
ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
|
|
put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
|
|
}
|
|
if (np->rxopt.bits.rxhlim) {
|
|
int hlim = np->mcast_hops;
|
|
put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
|
|
}
|
|
if (np->rxopt.bits.rxoinfo) {
|
|
struct in6_pktinfo src_info;
|
|
src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
|
|
np->sticky_pktinfo.ipi6_ifindex;
|
|
np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) :
|
|
ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr));
|
|
put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
|
|
}
|
|
if (np->rxopt.bits.rxohlim) {
|
|
int hlim = np->mcast_hops;
|
|
put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
|
|
}
|
|
}
|
|
len -= msg.msg_controllen;
|
|
return put_user(len, optlen);
|
|
}
|
|
case IPV6_MTU:
|
|
{
|
|
struct dst_entry *dst;
|
|
|
|
val = 0;
|
|
rcu_read_lock();
|
|
dst = __sk_dst_get(sk);
|
|
if (dst)
|
|
val = dst_mtu(dst);
|
|
rcu_read_unlock();
|
|
if (!val)
|
|
return -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
case IPV6_V6ONLY:
|
|
val = np->ipv6only;
|
|
break;
|
|
|
|
case IPV6_RECVPKTINFO:
|
|
val = np->rxopt.bits.rxinfo;
|
|
break;
|
|
|
|
case IPV6_2292PKTINFO:
|
|
val = np->rxopt.bits.rxoinfo;
|
|
break;
|
|
|
|
case IPV6_RECVHOPLIMIT:
|
|
val = np->rxopt.bits.rxhlim;
|
|
break;
|
|
|
|
case IPV6_2292HOPLIMIT:
|
|
val = np->rxopt.bits.rxohlim;
|
|
break;
|
|
|
|
case IPV6_RECVRTHDR:
|
|
val = np->rxopt.bits.srcrt;
|
|
break;
|
|
|
|
case IPV6_2292RTHDR:
|
|
val = np->rxopt.bits.osrcrt;
|
|
break;
|
|
|
|
case IPV6_HOPOPTS:
|
|
case IPV6_RTHDRDSTOPTS:
|
|
case IPV6_RTHDR:
|
|
case IPV6_DSTOPTS:
|
|
{
|
|
|
|
lock_sock(sk);
|
|
len = ipv6_getsockopt_sticky(sk, np->opt,
|
|
optname, optval, len);
|
|
release_sock(sk);
|
|
/* check if ipv6_getsockopt_sticky() returns err code */
|
|
if (len < 0)
|
|
return len;
|
|
return put_user(len, optlen);
|
|
}
|
|
|
|
case IPV6_RECVHOPOPTS:
|
|
val = np->rxopt.bits.hopopts;
|
|
break;
|
|
|
|
case IPV6_2292HOPOPTS:
|
|
val = np->rxopt.bits.ohopopts;
|
|
break;
|
|
|
|
case IPV6_RECVDSTOPTS:
|
|
val = np->rxopt.bits.dstopts;
|
|
break;
|
|
|
|
case IPV6_2292DSTOPTS:
|
|
val = np->rxopt.bits.odstopts;
|
|
break;
|
|
|
|
case IPV6_TCLASS:
|
|
val = np->tclass;
|
|
break;
|
|
|
|
case IPV6_RECVTCLASS:
|
|
val = np->rxopt.bits.rxtclass;
|
|
break;
|
|
|
|
case IPV6_FLOWINFO:
|
|
val = np->rxopt.bits.rxflow;
|
|
break;
|
|
|
|
case IPV6_RECVPATHMTU:
|
|
val = np->rxopt.bits.rxpmtu;
|
|
break;
|
|
|
|
case IPV6_PATHMTU:
|
|
{
|
|
struct dst_entry *dst;
|
|
struct ip6_mtuinfo mtuinfo;
|
|
|
|
if (len < sizeof(mtuinfo))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(mtuinfo);
|
|
memset(&mtuinfo, 0, sizeof(mtuinfo));
|
|
|
|
rcu_read_lock();
|
|
dst = __sk_dst_get(sk);
|
|
if (dst)
|
|
mtuinfo.ip6m_mtu = dst_mtu(dst);
|
|
rcu_read_unlock();
|
|
if (!mtuinfo.ip6m_mtu)
|
|
return -ENOTCONN;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &mtuinfo, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
case IPV6_TRANSPARENT:
|
|
val = inet_sk(sk)->transparent;
|
|
break;
|
|
|
|
case IPV6_RECVORIGDSTADDR:
|
|
val = np->rxopt.bits.rxorigdstaddr;
|
|
break;
|
|
|
|
case IPV6_UNICAST_HOPS:
|
|
case IPV6_MULTICAST_HOPS:
|
|
{
|
|
struct dst_entry *dst;
|
|
|
|
if (optname == IPV6_UNICAST_HOPS)
|
|
val = np->hop_limit;
|
|
else
|
|
val = np->mcast_hops;
|
|
|
|
if (val < 0) {
|
|
rcu_read_lock();
|
|
dst = __sk_dst_get(sk);
|
|
if (dst)
|
|
val = ip6_dst_hoplimit(dst);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
if (val < 0)
|
|
val = sock_net(sk)->ipv6.devconf_all->hop_limit;
|
|
break;
|
|
}
|
|
|
|
case IPV6_MULTICAST_LOOP:
|
|
val = np->mc_loop;
|
|
break;
|
|
|
|
case IPV6_MULTICAST_IF:
|
|
val = np->mcast_oif;
|
|
break;
|
|
|
|
case IPV6_MTU_DISCOVER:
|
|
val = np->pmtudisc;
|
|
break;
|
|
|
|
case IPV6_RECVERR:
|
|
val = np->recverr;
|
|
break;
|
|
|
|
case IPV6_FLOWINFO_SEND:
|
|
val = np->sndflow;
|
|
break;
|
|
|
|
case IPV6_ADDR_PREFERENCES:
|
|
val = 0;
|
|
|
|
if (np->srcprefs & IPV6_PREFER_SRC_TMP)
|
|
val |= IPV6_PREFER_SRC_TMP;
|
|
else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
|
|
val |= IPV6_PREFER_SRC_PUBLIC;
|
|
else {
|
|
/* XXX: should we return system default? */
|
|
val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
|
|
}
|
|
|
|
if (np->srcprefs & IPV6_PREFER_SRC_COA)
|
|
val |= IPV6_PREFER_SRC_COA;
|
|
else
|
|
val |= IPV6_PREFER_SRC_HOME;
|
|
break;
|
|
|
|
case IPV6_MINHOPCOUNT:
|
|
val = np->min_hopcount;
|
|
break;
|
|
|
|
case IPV6_DONTFRAG:
|
|
val = np->dontfrag;
|
|
break;
|
|
|
|
default:
|
|
return -ENOPROTOOPT;
|
|
}
|
|
len = min_t(unsigned int, sizeof(int), len);
|
|
if(put_user(len, optlen))
|
|
return -EFAULT;
|
|
if(copy_to_user(optval,&val,len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
int ipv6_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int err;
|
|
|
|
if (level == SOL_IP && sk->sk_type != SOCK_RAW)
|
|
return udp_prot.getsockopt(sk, level, optname, optval, optlen);
|
|
|
|
if(level != SOL_IPV6)
|
|
return -ENOPROTOOPT;
|
|
|
|
err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
err = nf_getsockopt(sk, PF_INET6, optname, optval,
|
|
&len);
|
|
release_sock(sk);
|
|
if (err >= 0)
|
|
err = put_user(len, optlen);
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ipv6_getsockopt);
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int err;
|
|
|
|
if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
|
|
if (udp_prot.compat_getsockopt != NULL)
|
|
return udp_prot.compat_getsockopt(sk, level, optname,
|
|
optval, optlen);
|
|
return udp_prot.getsockopt(sk, level, optname, optval, optlen);
|
|
}
|
|
|
|
if (level != SOL_IPV6)
|
|
return -ENOPROTOOPT;
|
|
|
|
if (optname == MCAST_MSFILTER)
|
|
return compat_mc_getsockopt(sk, level, optname, optval, optlen,
|
|
ipv6_getsockopt);
|
|
|
|
err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
|
|
#ifdef CONFIG_NETFILTER
|
|
/* we need to exclude all possible ENOPROTOOPTs except default case */
|
|
if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
|
|
int len;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
err = compat_nf_getsockopt(sk, PF_INET6,
|
|
optname, optval, &len);
|
|
release_sock(sk);
|
|
if (err >= 0)
|
|
err = put_user(len, optlen);
|
|
}
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(compat_ipv6_getsockopt);
|
|
#endif
|
|
|