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[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [ipv6/] [ipv6_sockglue.c] - Blame information for rev 82

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/*
 *      IPv6 BSD socket options interface
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *
 *      Based on linux/net/ipv4/ip_sockglue.c
 *
 *      $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 *      FIXME: Make the setsockopt code POSIX compliant: That is
 *
 *      o       Return -EINVAL for setsockopt of short lengths
 *      o       Truncate getsockopt returns
 *      o       Return an optlen of the truncated length if need be
 *
 *      Changes:
 *      David L Stevens <dlstevens@us.ibm.com>:
 *              - added multicast source filtering API for MLDv2
 */
 
#include <linux/module.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/netfilter.h>
 
#include <net/sock.h>
#include <net/snmp.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/protocol.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/inet_common.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/udplite.h>
#include <net/xfrm.h>
 
#include <asm/uaccess.h>
 
DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
 
static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
                                                    int proto)
{
        struct inet6_protocol *ops = NULL;
 
        for (;;) {
                struct ipv6_opt_hdr *opth;
                int len;
 
                if (proto != NEXTHDR_HOP) {
                        ops = rcu_dereference(inet6_protos[proto]);
 
                        if (unlikely(!ops))
                                break;
 
                        if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
                                break;
                }
 
                if (unlikely(!pskb_may_pull(skb, 8)))
                        break;
 
                opth = (void *)skb->data;
                len = opth->hdrlen * 8 + 8;
 
                if (unlikely(!pskb_may_pull(skb, len)))
                        break;
 
                proto = opth->nexthdr;
                __skb_pull(skb, len);
        }
 
        return ops;
}
 
static int ipv6_gso_send_check(struct sk_buff *skb)
{
        struct ipv6hdr *ipv6h;
        struct inet6_protocol *ops;
        int err = -EINVAL;
 
        if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
                goto out;
 
        ipv6h = ipv6_hdr(skb);
        __skb_pull(skb, sizeof(*ipv6h));
        err = -EPROTONOSUPPORT;
 
        rcu_read_lock();
        ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
        if (likely(ops && ops->gso_send_check)) {
                skb_reset_transport_header(skb);
                err = ops->gso_send_check(skb);
        }
        rcu_read_unlock();
 
out:
        return err;
}
 
static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
{
        struct sk_buff *segs = ERR_PTR(-EINVAL);
        struct ipv6hdr *ipv6h;
        struct inet6_protocol *ops;
 
        if (!(features & NETIF_F_V6_CSUM))
                features &= ~NETIF_F_SG;
 
        if (unlikely(skb_shinfo(skb)->gso_type &
                     ~(SKB_GSO_UDP |
                       SKB_GSO_DODGY |
                       SKB_GSO_TCP_ECN |
                       SKB_GSO_TCPV6 |
                       0)))
                goto out;
 
        if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
                goto out;
 
        ipv6h = ipv6_hdr(skb);
        __skb_pull(skb, sizeof(*ipv6h));
        segs = ERR_PTR(-EPROTONOSUPPORT);
 
        rcu_read_lock();
        ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
        if (likely(ops && ops->gso_segment)) {
                skb_reset_transport_header(skb);
                segs = ops->gso_segment(skb, features);
        }
        rcu_read_unlock();
 
        if (unlikely(IS_ERR(segs)))
                goto out;
 
        for (skb = segs; skb; skb = skb->next) {
                ipv6h = ipv6_hdr(skb);
                ipv6h->payload_len = htons(skb->len - skb->mac_len -
                                           sizeof(*ipv6h));
        }
 
out:
        return segs;
}
 
static struct packet_type ipv6_packet_type = {
        .type = __constant_htons(ETH_P_IPV6),
        .func = ipv6_rcv,
        .gso_send_check = ipv6_gso_send_check,
        .gso_segment = ipv6_gso_segment,
};
 
struct ip6_ra_chain *ip6_ra_chain;
DEFINE_RWLOCK(ip6_ra_lock);
 
int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
{
        struct ip6_ra_chain *ra, *new_ra, **rap;
 
        /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
        if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
                return -EINVAL;
 
        new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
 
        write_lock_bh(&ip6_ra_lock);
        for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
                if (ra->sk == sk) {
                        if (sel>=0) {
                                write_unlock_bh(&ip6_ra_lock);
                                kfree(new_ra);
                                return -EADDRINUSE;
                        }
 
                        *rap = ra->next;
                        write_unlock_bh(&ip6_ra_lock);
 
                        if (ra->destructor)
                                ra->destructor(sk);
                        sock_put(sk);
                        kfree(ra);
                        return 0;
                }
        }
        if (new_ra == NULL) {
                write_unlock_bh(&ip6_ra_lock);
                return -ENOBUFS;
        }
        new_ra->sk = sk;
        new_ra->sel = sel;
        new_ra->destructor = destructor;
        new_ra->next = ra;
        *rap = new_ra;
        sock_hold(sk);
        write_unlock_bh(&ip6_ra_lock);
        return 0;
}
 
static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
                    char __user *optval, int optlen)
{
        struct ipv6_pinfo *np = inet6_sk(sk);
        int val, valbool;
        int retv = -ENOPROTOOPT;
 
        if (optval == NULL)
                val=0;
        else if (get_user(val, (int __user *) optval))
                return -EFAULT;
 
        valbool = (val!=0);
 
        lock_sock(sk);
 
        switch (optname) {
 
        case IPV6_ADDRFORM:
                if (val == PF_INET) {
                        struct ipv6_txoptions *opt;
                        struct sk_buff *pktopt;
 
                        if (sk->sk_protocol != IPPROTO_UDP &&
                            sk->sk_protocol != IPPROTO_UDPLITE &&
                            sk->sk_protocol != IPPROTO_TCP)
                                break;
 
                        if (sk->sk_state != TCP_ESTABLISHED) {
                                retv = -ENOTCONN;
                                break;
                        }
 
                        if (ipv6_only_sock(sk) ||
                            !ipv6_addr_v4mapped(&np->daddr)) {
                                retv = -EADDRNOTAVAIL;
                                break;
                        }
 
                        fl6_free_socklist(sk);
                        ipv6_sock_mc_close(sk);
 
                        /*
                         * Sock is moving from IPv6 to IPv4 (sk_prot), so
                         * remove it from the refcnt debug socks count in the
                         * original family...
                         */
                        sk_refcnt_debug_dec(sk);
 
                        if (sk->sk_protocol == IPPROTO_TCP) {
                                struct inet_connection_sock *icsk = inet_csk(sk);
 
                                local_bh_disable();
                                sock_prot_dec_use(sk->sk_prot);
                                sock_prot_inc_use(&tcp_prot);
                                local_bh_enable();
                                sk->sk_prot = &tcp_prot;
                                icsk->icsk_af_ops = &ipv4_specific;
                                sk->sk_socket->ops = &inet_stream_ops;
                                sk->sk_family = PF_INET;
                                tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
                        } else {
                                struct proto *prot = &udp_prot;
 
                                if (sk->sk_protocol == IPPROTO_UDPLITE)
                                        prot = &udplite_prot;
                                local_bh_disable();
                                sock_prot_dec_use(sk->sk_prot);
                                sock_prot_inc_use(prot);
                                local_bh_enable();
                                sk->sk_prot = prot;
                                sk->sk_socket->ops = &inet_dgram_ops;
                                sk->sk_family = PF_INET;
                        }
                        opt = xchg(&np->opt, NULL);
                        if (opt)
                                sock_kfree_s(sk, opt, opt->tot_len);
                        pktopt = xchg(&np->pktoptions, NULL);
                        if (pktopt)
                                kfree_skb(pktopt);
 
                        sk->sk_destruct = inet_sock_destruct;
                        /*
                         * ... and add it to the refcnt debug socks count
                         * in the new family. -acme
                         */
                        sk_refcnt_debug_inc(sk);
                        module_put(THIS_MODULE);
                        retv = 0;
                        break;
                }
                goto e_inval;
 
        case IPV6_V6ONLY:
                if (inet_sk(sk)->num)
                        goto e_inval;
                np->ipv6only = valbool;
                retv = 0;
                break;
 
        case IPV6_RECVPKTINFO:
                np->rxopt.bits.rxinfo = valbool;
                retv = 0;
                break;
 
        case IPV6_2292PKTINFO:
                np->rxopt.bits.rxoinfo = valbool;
                retv = 0;
                break;
 
        case IPV6_RECVHOPLIMIT:
                np->rxopt.bits.rxhlim = valbool;
                retv = 0;
                break;
 
        case IPV6_2292HOPLIMIT:
                np->rxopt.bits.rxohlim = valbool;
                retv = 0;
                break;
 
        case IPV6_RECVRTHDR:
                np->rxopt.bits.srcrt = valbool;
                retv = 0;
                break;
 
        case IPV6_2292RTHDR:
                np->rxopt.bits.osrcrt = valbool;
                retv = 0;
                break;
 
        case IPV6_RECVHOPOPTS:
                np->rxopt.bits.hopopts = valbool;
                retv = 0;
                break;
 
        case IPV6_2292HOPOPTS:
                np->rxopt.bits.ohopopts = valbool;
                retv = 0;
                break;
 
        case IPV6_RECVDSTOPTS:
                np->rxopt.bits.dstopts = valbool;
                retv = 0;
                break;
 
        case IPV6_2292DSTOPTS:
                np->rxopt.bits.odstopts = valbool;
                retv = 0;
                break;
 
        case IPV6_TCLASS:
                if (val < -1 || val > 0xff)
                        goto e_inval;
                np->tclass = val;
                retv = 0;
                break;
 
        case IPV6_RECVTCLASS:
                np->rxopt.bits.rxtclass = valbool;
                retv = 0;
                break;
 
        case IPV6_FLOWINFO:
                np->rxopt.bits.rxflow = valbool;
                retv = 0;
                break;
 
        case IPV6_HOPOPTS:
        case IPV6_RTHDRDSTOPTS:
        case IPV6_RTHDR:
        case IPV6_DSTOPTS:
        {
                struct ipv6_txoptions *opt;
                if (optlen == 0)
                        optval = NULL;
 
                /* hop-by-hop / destination options are privileged option */
                retv = -EPERM;
                if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
                        break;
 
                retv = -EINVAL;
                if (optlen & 0x7 || optlen > 8 * 255)
                        break;
 
                opt = ipv6_renew_options(sk, np->opt, optname,
                                         (struct ipv6_opt_hdr __user *)optval,
                                         optlen);
                if (IS_ERR(opt)) {
                        retv = PTR_ERR(opt);
                        break;
                }
 
                /* routing header option needs extra check */
                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:
                                break;
#endif
                        default:
                                goto sticky_done;
                        }
 
                        if ((rthdr->hdrlen & 1) ||
                            (rthdr->hdrlen >> 1) != rthdr->segments_left)
                                goto sticky_done;
                }
 
                retv = 0;
                if (inet_sk(sk)->is_icsk) {
                        if (opt) {
                                struct inet_connection_sock *icsk = inet_csk(sk);
                                if (!((1 << sk->sk_state) &
                                      (TCPF_LISTEN | TCPF_CLOSE))
                                    && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
                                        icsk->icsk_ext_hdr_len =
                                                opt->opt_flen + opt->opt_nflen;
                                        icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
                                }
                        }
                        opt = xchg(&np->opt, opt);
                        sk_dst_reset(sk);
                } else {
                        write_lock(&sk->sk_dst_lock);
                        opt = xchg(&np->opt, opt);
                        write_unlock(&sk->sk_dst_lock);
                        sk_dst_reset(sk);
                }
sticky_done:
                if (opt)
                        sock_kfree_s(sk, opt, opt->tot_len);
                break;
        }
 
        case IPV6_2292PKTOPTIONS:
        {
                struct ipv6_txoptions *opt = NULL;
                struct msghdr msg;
                struct flowi fl;
                int junk;
 
                fl.fl6_flowlabel = 0;
                fl.oif = sk->sk_bound_dev_if;
 
                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(&msg, &fl, opt, &junk, &junk);
                if (retv)
                        goto done;
update:
                retv = 0;
                if (inet_sk(sk)->is_icsk) {
                        if (opt) {
                                struct inet_connection_sock *icsk = inet_csk(sk);
                                if (!((1 << sk->sk_state) &
                                      (TCPF_LISTEN | TCPF_CLOSE))
                                    && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
                                        icsk->icsk_ext_hdr_len =
                                                opt->opt_flen + opt->opt_nflen;
                                        icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
                                }
                        }
                        opt = xchg(&np->opt, opt);
                        sk_dst_reset(sk);
                } else {
                        write_lock(&sk->sk_dst_lock);
                        opt = xchg(&np->opt, opt);
                        write_unlock(&sk->sk_dst_lock);
                        sk_dst_reset(sk);
                }
 
done:
                if (opt)
                        sock_kfree_s(sk, opt, opt->tot_len);
                break;
        }
        case IPV6_UNICAST_HOPS:
                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)
                        goto e_inval;
                if (val > 255 || val < -1)
                        goto e_inval;
                np->mcast_hops = val;
                retv = 0;
                break;
 
        case IPV6_MULTICAST_LOOP:
                np->mc_loop = valbool;
                retv = 0;
                break;
 
        case IPV6_MULTICAST_IF:
                if (sk->sk_type == SOCK_STREAM)
                        goto e_inval;
 
                if (val) {
                        if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
                                goto e_inval;
 
                        if (__dev_get_by_index(&init_net, val) == NULL) {
                                retv = -ENODEV;
                                break;
                        }
                }
                np->mcast_oif = val;
                retv = 0;
                break;
        case IPV6_ADD_MEMBERSHIP:
        case IPV6_DROP_MEMBERSHIP:
        {
                struct ipv6_mreq mreq;
 
                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;
 
                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:
                retv = ip6_ra_control(sk, val, NULL);
                break;
        case IPV6_MTU_DISCOVER:
                if (val<0 || val>3)
                        goto e_inval;
                np->pmtudisc = val;
                retv = 0;
                break;
        case IPV6_MTU:
                if (val && val < IPV6_MIN_MTU)
                        goto e_inval;
                np->frag_size = val;
                retv = 0;
                break;
        case IPV6_RECVERR:
                np->recverr = valbool;
                if (!val)
                        skb_queue_purge(&sk->sk_error_queue);
                retv = 0;
                break;
        case IPV6_FLOWINFO_SEND:
                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;
 
        }
        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, 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, 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;
 
        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 ipv6_optlen(hdr);
}
 
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 (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 -EINVAL;
                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;
                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;
                                ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
                                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;
                                ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
                                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;
                lock_sock(sk);
                dst = sk_dst_get(sk);
                if (dst) {
                        val = dst_mtu(dst);
                        dst_release(dst);
                }
                release_sock(sk);
                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);
                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;
                if (val < 0)
                        val = 0;
                break;
 
        case IPV6_RECVTCLASS:
                val = np->rxopt.bits.rxtclass;
                break;
 
        case IPV6_FLOWINFO:
                val = np->rxopt.bits.rxflow;
                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;
 
                dst = sk_dst_get(sk);
                if (dst) {
                        if (val < 0)
                                val = dst_metric(dst, RTAX_HOPLIMIT);
                        if (val < 0)
                                val = ipv6_get_hoplimit(dst->dev);
                        dst_release(dst);
                }
                if (val < 0)
                        val = ipv6_devconf.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;
 
        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;
 
        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
 
void __init ipv6_packet_init(void)
{
        dev_add_pack(&ipv6_packet_type);
}
 
void ipv6_packet_cleanup(void)
{
        dev_remove_pack(&ipv6_packet_type);
}
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[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [ipv6/] [ipv6_sockglue.c] - Blame information for rev 82

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* IPv6 BSD socket options interface`
3			`* Linux INET6 implementation`
4			`*`
5			`* Authors:`
6			`* Pedro Roque <roque@di.fc.ul.pt>`
7			`*`
8			`* Based on linux/net/ipv4/ip_sockglue.c`
9			`*`
10			`* $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $`
11			`*`
12			`* This program is free software; you can redistribute it and/or`
13			`* modify it under the terms of the GNU General Public License`
14			`* as published by the Free Software Foundation; either version`
15			`* 2 of the License, or (at your option) any later version.`
16			`*`
17			`* FIXME: Make the setsockopt code POSIX compliant: That is`
18			`*`
19			`* o Return -EINVAL for setsockopt of short lengths`
20			`* o Truncate getsockopt returns`
21			`* o Return an optlen of the truncated length if need be`
22			`*`
23			`* Changes:`
24			`* David L Stevens <dlstevens@us.ibm.com>:`
25			`* - added multicast source filtering API for MLDv2`
26			`*/`
27
28			`#include <linux/module.h>`
29			`#include <linux/capability.h>`
30			`#include <linux/errno.h>`
31			`#include <linux/types.h>`
32			`#include <linux/socket.h>`
33			`#include <linux/sockios.h>`
34			`#include <linux/net.h>`
35			`#include <linux/in6.h>`
36			`#include <linux/netdevice.h>`
37			`#include <linux/if_arp.h>`
38			`#include <linux/init.h>`
39			`#include <linux/sysctl.h>`
40			`#include <linux/netfilter.h>`