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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [ipv6/] [ipv6_sockglue.c] - Blame information for rev 1765

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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 1.1.1.1 2004-04-15 01:14:31 phoenix 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/config.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/sched.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 <asm/uaccess.h>
 
struct ipv6_mib ipv6_statistics[NR_CPUS*2];
 
struct packet_type ipv6_packet_type =
{
        __constant_htons(ETH_P_IPV6),
        NULL,                                   /* All devices */
        ipv6_rcv,
        (void*)1,
        NULL
};
 
/*
 *      addrconf module should be notifyed of a device going up
 */
static struct notifier_block ipv6_dev_notf = {
        addrconf_notify,
        NULL,
 
};
 
struct ip6_ra_chain *ip6_ra_chain;
rwlock_t ip6_ra_lock = RW_LOCK_UNLOCKED;
 
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->type != SOCK_RAW || 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);
                                if (new_ra)
                                        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;
}
 
extern int ip6_mc_source(int add, int omode, struct sock *sk,
        struct group_source_req *pgsr);
extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
        struct group_filter *optval, int *optlen);
 
 
int ipv6_setsockopt(struct sock *sk, int level, int optname, char *optval,
                    int optlen)
{
        struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
        int val, valbool;
        int retv = -ENOPROTOOPT;
 
        if(level==SOL_IP && sk->type != SOCK_RAW)
                return udp_prot.setsockopt(sk, level, optname, optval, optlen);
 
        if(level!=SOL_IPV6)
                goto out;
 
        if (optval == NULL)
                val=0;
        else if (get_user(val, (int *) 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->protocol != IPPROTO_UDP &&
                            sk->protocol != IPPROTO_TCP)
                                break;
 
                        if (sk->state != TCP_ESTABLISHED) {
                                retv = -ENOTCONN;
                                break;
                        }
 
                        if (ipv6_only_sock(sk) ||
                            !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
                                retv = -EADDRNOTAVAIL;
                                break;
                        }
 
                        fl6_free_socklist(sk);
                        ipv6_sock_mc_close(sk);
 
                        if (sk->protocol == IPPROTO_TCP) {
                                struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
 
                                local_bh_disable();
                                sock_prot_dec_use(sk->prot);
                                sock_prot_inc_use(&tcp_prot);
                                local_bh_enable();
                                sk->prot = &tcp_prot;
                                tp->af_specific = &ipv4_specific;
                                sk->socket->ops = &inet_stream_ops;
                                sk->family = PF_INET;
                                tcp_sync_mss(sk, tp->pmtu_cookie);
                        } else {
                                local_bh_disable();
                                sock_prot_dec_use(sk->prot);
                                sock_prot_inc_use(&udp_prot);
                                local_bh_enable();
                                sk->prot = &udp_prot;
                                sk->socket->ops = &inet_dgram_ops;
                                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->destruct = inet_sock_destruct;
#ifdef INET_REFCNT_DEBUG
                        atomic_dec(&inet6_sock_nr);
#endif
                        MOD_DEC_USE_COUNT;
                        retv = 0;
                        break;
                }
                goto e_inval;
 
        case IPV6_V6ONLY:
                if (sk->num)
                        goto e_inval;
                np->ipv6only = valbool;
                retv = 0;
                break;
 
        case IPV6_PKTINFO:
                np->rxopt.bits.rxinfo = valbool;
                retv = 0;
                break;
 
        case IPV6_HOPLIMIT:
                np->rxopt.bits.rxhlim = valbool;
                retv = 0;
                break;
 
        case IPV6_RTHDR:
                if (val < 0 || val > 2)
                        goto e_inval;
                np->rxopt.bits.srcrt = val;
                retv = 0;
                break;
 
        case IPV6_HOPOPTS:
                np->rxopt.bits.hopopts = valbool;
                retv = 0;
                break;
 
        case IPV6_AUTHHDR:
                np->rxopt.bits.authhdr = valbool;
                retv = 0;
                break;
 
        case IPV6_DSTOPTS:
                np->rxopt.bits.dstopts = valbool;
                retv = 0;
                break;
 
        case IPV6_FLOWINFO:
                np->rxopt.bits.rxflow = valbool;
                retv = 0;
                break;
 
        case IPV6_PKTOPTIONS:
        {
                struct ipv6_txoptions *opt = NULL;
                struct msghdr msg;
                struct flowi fl;
                int junk;
 
                fl.fl6_flowlabel = 0;
                fl.oif = 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);
                if (retv)
                        goto done;
update:
                retv = 0;
                if (sk->type == SOCK_STREAM) {
                        if (opt) {
                                struct tcp_opt *tp = &sk->tp_pinfo.af_tcp;
                                if (!((1<<sk->state)&(TCPF_LISTEN|TCPF_CLOSE))
                                    && sk->daddr != LOOPBACK4_IPV6) {
                                        tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
                                        tcp_sync_mss(sk, tp->pmtu_cookie);
                                }
                        }
                        opt = xchg(&np->opt, opt);
                        sk_dst_reset(sk);
                } else {
                        write_lock(&sk->dst_lock);
                        opt = xchg(&np->opt, opt);
                        write_unlock(&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->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->type == SOCK_STREAM)
                        goto e_inval;
                if (sk->bound_dev_if && sk->bound_dev_if != val)
                        goto e_inval;
 
                if (__dev_get_by_index(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 = -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);
                        if (retv)
                                break;
                        omode = MCAST_INCLUDE;
                        add = 1;
                } else /*IP_DROP_SOURCE_MEMBERSHIP */ {
                        omode = MCAST_INCLUDE;
                        add = 0;
                }
                retv = ip6_mc_source(add, omode, sk, &greqs);
                break;
        }
        case MCAST_MSFILTER:
        {
                extern int sysctl_optmem_max;
                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 = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
                if (gsf == 0) {
                        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>2)
                        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->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;
 
#ifdef CONFIG_NETFILTER
        default:
                retv = nf_setsockopt(sk, PF_INET6, optname, optval,
                                            optlen);
                break;
#endif
 
        }
        release_sock(sk);
 
out:
        return retv;
 
e_inval:
        release_sock(sk);
        return -EINVAL;
}
 
int ipv6_getsockopt(struct sock *sk, int level, int optname, char *optval,
                    int *optlen)
{
        struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
        int len;
        int val;
 
        if(level==SOL_IP && sk->type != SOCK_RAW)
                return udp_prot.getsockopt(sk, level, optname, optval, optlen);
        if(level!=SOL_IPV6)
                return -ENOPROTOOPT;
        if (get_user(len, optlen))
                return -EFAULT;
        switch (optname) {
        case IPV6_PKTOPTIONS:
        {
                struct msghdr msg;
                struct sk_buff *skb;
 
                if (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);
                        }
                }
                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->pmtu;
                        dst_release(dst);
                }
                release_sock(sk);
                if (!val)
                        return -ENOTCONN;
                break;
        }
 
        case IPV6_V6ONLY:
                val = np->ipv6only;
                break;
 
        case IPV6_PKTINFO:
                val = np->rxopt.bits.rxinfo;
                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 *)optval, optlen);
                release_sock(sk);
                return err;
        }
 
        case IPV6_HOPLIMIT:
                val = np->rxopt.bits.rxhlim;
                break;
 
        case IPV6_RTHDR:
                val = np->rxopt.bits.srcrt;
                break;
 
        case IPV6_HOPOPTS:
                val = np->rxopt.bits.hopopts;
                break;
 
        case IPV6_AUTHHDR:
                val = np->rxopt.bits.authhdr;
                break;
 
        case IPV6_DSTOPTS:
                val = np->rxopt.bits.dstopts;
                break;
 
        case IPV6_FLOWINFO:
                val = np->rxopt.bits.rxflow;
                break;
 
        case IPV6_UNICAST_HOPS:
                val = np->hop_limit;
                break;
 
        case IPV6_MULTICAST_HOPS:
                val = np->mcast_hops;
                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:
#ifdef CONFIG_NETFILTER
                lock_sock(sk);
                val = nf_getsockopt(sk, PF_INET6, optname, optval,
                                    &len);
                release_sock(sk);
                if (val >= 0)
                        val = put_user(len, optlen);
                return val;
#else
                return -EINVAL;
#endif
        }
        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;
}
 
#if defined(MODULE) && defined(CONFIG_SYSCTL)
 
/*
 *      sysctl registration functions defined in sysctl_net_ipv6.c
 */
 
extern void ipv6_sysctl_register(void);
extern void ipv6_sysctl_unregister(void);
#endif
 
void __init ipv6_packet_init(void)
{
        dev_add_pack(&ipv6_packet_type);
}
 
void __init ipv6_netdev_notif_init(void)
{
        register_netdevice_notifier(&ipv6_dev_notf);
}
 
#ifdef MODULE
void ipv6_packet_cleanup(void)
{
        dev_remove_pack(&ipv6_packet_type);
}
 
void ipv6_netdev_notif_cleanup(void)
{
        unregister_netdevice_notifier(&ipv6_dev_notf);
}
#endif

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [ipv6/] [ipv6_sockglue.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
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 1.1.1.1 2004-04-15 01:14:31 phoenix 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/config.h>`
30			`#include <linux/errno.h>`
31			`#include <linux/types.h>`
32			`#include <linux/socket.h>`
33			`#include <linux/sockios.h>`
34			`#include <linux/sched.h>`
35			`#include <linux/net.h>`
36			`#include <linux/in6.h>`
37			`#include <linux/netdevice.h>`
38			`#include <linux/if_arp.h>`
39			`#include <linux/init.h>`
40			`#include <linux/sysctl.h>`
41			`#include <linux/netfilter.h>`
42
43			`#include <net/sock.h>`
44			`#include <net/snmp.h>`
45			`#include <net/ipv6.h>`
46			`#include <net/ndisc.h>`
47			`#include <net/protocol.h>`
48			`#include <net/transp_v6.h>`
49			`#include <net/ip6_route.h>`
50			`#include <net/addrconf.h>`
51			`#include <net/inet_common.h>`
52			`#include <net/tcp.h>`
53			`#include <net/udp.h>`
54
55			`#include <asm/uaccess.h>`
56
57			`struct ipv6_mib ipv6_statistics[NR_CPUS*2];`
58
59			`struct packet_type ipv6_packet_type =`
60			`{`
61			`__constant_htons(ETH_P_IPV6),`
62			`NULL, /* All devices */`
63			`ipv6_rcv,`
64			`(void*)1,`
65			`NULL`
66			`};`
67
68			`/*`
69			`* addrconf module should be notifyed of a device going up`
70			`*/`
71			`static struct notifier_block ipv6_dev_notf = {`
72			`addrconf_notify,`
73			`NULL,`
74
75			`};`
76
77			`struct ip6_ra_chain *ip6_ra_chain;`
78			`rwlock_t ip6_ra_lock = RW_LOCK_UNLOCKED;`
79
80			`int ip6_ra_control(struct sock sk, int sel, void (destructor)(struct sock *))`
81			`{`
82			`struct ip6_ra_chain ra, new_ra, **rap;`
83
84			`/* RA packet may be delivered ONLY to IPPROTO_RAW socket */`
85			`if (sk->type != SOCK_RAW \|\| sk->num != IPPROTO_RAW)`
86			`return -EINVAL;`
87
88			`new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;`
89
90			`write_lock_bh(&ip6_ra_lock);`
91			`for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {`
92			`if (ra->sk == sk) {`
93			`if (sel>=0) {`
94			`write_unlock_bh(&ip6_ra_lock);`
95			`if (new_ra)`
96			`kfree(new_ra);`
97			`return -EADDRINUSE;`
98			`}`
99
100			`*rap = ra->next;`
101			`write_unlock_bh(&ip6_ra_lock);`
102
103			`if (ra->destructor)`
104			`ra->destructor(sk);`
105			`sock_put(sk);`
106			`kfree(ra);`
107			`return 0;`
108			`}`
109			`}`
110			`if (new_ra == NULL) {`
111			`write_unlock_bh(&ip6_ra_lock);`
112			`return -ENOBUFS;`
113			`}`
114			`new_ra->sk = sk;`
115			`new_ra->sel = sel;`
116			`new_ra->destructor = destructor;`
117			`new_ra->next = ra;`
118			`*rap = new_ra;`
119			`sock_hold(sk);`
120			`write_unlock_bh(&ip6_ra_lock);`
121			`return 0;`
122			`}`
123
124			`extern int ip6_mc_source(int add, int omode, struct sock *sk,`
125			`struct group_source_req *pgsr);`
126			`extern int ip6_mc_msfilter(struct sock sk, struct group_filter gsf);`
127			`extern int ip6_mc_msfget(struct sock sk, struct group_filter gsf,`
128			`struct group_filter optval, int optlen);`
129
130
131			`int ipv6_setsockopt(struct sock sk, int level, int optname, char optval,`
132			`int optlen)`
133			`{`
134			`struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;`
135			`int val, valbool;`
136			`int retv = -ENOPROTOOPT;`
137
138			`if(level==SOL_IP && sk->type != SOCK_RAW)`
139			`return udp_prot.setsockopt(sk, level, optname, optval, optlen);`
140
141			`if(level!=SOL_IPV6)`
142			`goto out;`
143
144			`if (optval == NULL)`
145			`val=0;`
146			`else if (get_user(val, (int *) optval))`
147			`return -EFAULT;`
148
149			`valbool = (val!=0);`
150
151			`lock_sock(sk);`
152
153			`switch (optname) {`
154
155			`case IPV6_ADDRFORM:`
156			`if (val == PF_INET) {`
157			`struct ipv6_txoptions *opt;`
158			`struct sk_buff *pktopt;`
159
160			`if (sk->protocol != IPPROTO_UDP &&`
161			`sk->protocol != IPPROTO_TCP)`
162			`break;`
163
164			`if (sk->state != TCP_ESTABLISHED) {`
165			`retv = -ENOTCONN;`
166			`break;`
167			`}`
168
169			`if (ipv6_only_sock(sk) \|\|`
170			`!(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {`
171			`retv = -EADDRNOTAVAIL;`
172			`break;`
173			`}`
174
175			`fl6_free_socklist(sk);`
176			`ipv6_sock_mc_close(sk);`
177
178			`if (sk->protocol == IPPROTO_TCP) {`
179			`struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);`
180
181			`local_bh_disable();`
182			`sock_prot_dec_use(sk->prot);`
183			`sock_prot_inc_use(&tcp_prot);`
184			`local_bh_enable();`
185			`sk->prot = &tcp_prot;`
186			`tp->af_specific = &ipv4_specific;`
187			`sk->socket->ops = &inet_stream_ops;`
188			`sk->family = PF_INET;`
189			`tcp_sync_mss(sk, tp->pmtu_cookie);`
190			`} else {`
191			`local_bh_disable();`
192			`sock_prot_dec_use(sk->prot);`
193			`sock_prot_inc_use(&udp_prot);`
194			`local_bh_enable();`
195			`sk->prot = &udp_prot;`
196			`sk->socket->ops = &inet_dgram_ops;`
197			`sk->family = PF_INET;`
198			`}`
199			`opt = xchg(&np->opt, NULL);`
200			`if (opt)`
201			`sock_kfree_s(sk, opt, opt->tot_len);`
202			`pktopt = xchg(&np->pktoptions, NULL);`
203			`if (pktopt)`
204			`kfree_skb(pktopt);`
205
206			`sk->destruct = inet_sock_destruct;`
207			`#ifdef INET_REFCNT_DEBUG`
208			`atomic_dec(&inet6_sock_nr);`
209			`#endif`
210			`MOD_DEC_USE_COUNT;`
211			`retv = 0;`
212			`break;`
213			`}`
214			`goto e_inval;`
215
216			`case IPV6_V6ONLY:`
217			`if (sk->num)`
218			`goto e_inval;`
219			`np->ipv6only = valbool;`
220			`retv = 0;`
221			`break;`
222
223			`case IPV6_PKTINFO:`
224			`np->rxopt.bits.rxinfo = valbool;`
225			`retv = 0;`
226			`break;`
227
228			`case IPV6_HOPLIMIT:`
229			`np->rxopt.bits.rxhlim = valbool;`
230			`retv = 0;`
231			`break;`
232
233			`case IPV6_RTHDR:`
234			`if (val < 0 \|\| val > 2)`
235			`goto e_inval;`
236			`np->rxopt.bits.srcrt = val;`
237			`retv = 0;`
238			`break;`
239
240			`case IPV6_HOPOPTS:`
241			`np->rxopt.bits.hopopts = valbool;`
242			`retv = 0;`
243			`break;`
244
245			`case IPV6_AUTHHDR:`
246			`np->rxopt.bits.authhdr = valbool;`
247			`retv = 0;`
248			`break;`
249
250			`case IPV6_DSTOPTS:`
251			`np->rxopt.bits.dstopts = valbool;`
252			`retv = 0;`
253			`break;`
254
255			`case IPV6_FLOWINFO:`
256			`np->rxopt.bits.rxflow = valbool;`
257			`retv = 0;`
258			`break;`
259
260			`case IPV6_PKTOPTIONS:`
261			`{`
262			`struct ipv6_txoptions *opt = NULL;`
263			`struct msghdr msg;`
264			`struct flowi fl;`
265			`int junk;`
266
267			`fl.fl6_flowlabel = 0;`
268			`fl.oif = sk->bound_dev_if;`
269
270			`if (optlen == 0)`
271			`goto update;`
272
273			`/* 1K is probably excessive`
274			`* 1K is surely not enough, 2K per standard header is 16K.`
275			`*/`
276			`retv = -EINVAL;`
277			`if (optlen > 64*1024)`
278			`break;`
279
280			`opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);`
281			`retv = -ENOBUFS;`
282			`if (opt == NULL)`
283			`break;`
284
285			`memset(opt, 0, sizeof(*opt));`
286			`opt->tot_len = sizeof(*opt) + optlen;`
287			`retv = -EFAULT;`
288			`if (copy_from_user(opt+1, optval, optlen))`
289			`goto done;`
290
291			`msg.msg_controllen = optlen;`
292			`msg.msg_control = (void*)(opt+1);`
293
294			`retv = datagram_send_ctl(&msg, &fl, opt, &junk);`
295			`if (retv)`
296			`goto done;`
297			`update:`
298			`retv = 0;`
299			`if (sk->type == SOCK_STREAM) {`
300			`if (opt) {`
301			`struct tcp_opt *tp = &sk->tp_pinfo.af_tcp;`
302			`if (!((1<<sk->state)&(TCPF_LISTEN\|TCPF_CLOSE))`
303			`&& sk->daddr != LOOPBACK4_IPV6) {`
304			`tp->ext_header_len = opt->opt_flen + opt->opt_nflen;`
305			`tcp_sync_mss(sk, tp->pmtu_cookie);`
306			`}`
307			`}`
308			`opt = xchg(&np->opt, opt);`
309			`sk_dst_reset(sk);`
310			`} else {`
311			`write_lock(&sk->dst_lock);`
312			`opt = xchg(&np->opt, opt);`
313			`write_unlock(&sk->dst_lock);`
314			`sk_dst_reset(sk);`
315			`}`
316
317			`done:`
318			`if (opt)`
319			`sock_kfree_s(sk, opt, opt->tot_len);`
320			`break;`
321			`}`
322			`case IPV6_UNICAST_HOPS:`
323			`if (val > 255 \|\| val < -1)`
324			`goto e_inval;`
325			`np->hop_limit = val;`
326			`retv = 0;`
327			`break;`
328
329			`case IPV6_MULTICAST_HOPS:`
330			`if (sk->type == SOCK_STREAM)`
331			`goto e_inval;`
332			`if (val > 255 \|\| val < -1)`
333			`goto e_inval;`
334			`np->mcast_hops = val;`
335			`retv = 0;`
336			`break;`
337
338			`case IPV6_MULTICAST_LOOP:`
339			`np->mc_loop = valbool;`
340			`retv = 0;`
341			`break;`
342
343			`case IPV6_MULTICAST_IF:`
344			`if (sk->type == SOCK_STREAM)`
345			`goto e_inval;`
346			`if (sk->bound_dev_if && sk->bound_dev_if != val)`
347			`goto e_inval;`
348
349			`if (__dev_get_by_index(val) == NULL) {`
350			`retv = -ENODEV;`
351			`break;`
352			`}`
353			`np->mcast_oif = val;`
354			`retv = 0;`
355			`break;`
356			`case IPV6_ADD_MEMBERSHIP:`
357			`case IPV6_DROP_MEMBERSHIP:`
358			`{`
359			`struct ipv6_mreq mreq;`
360
361			`retv = -EFAULT;`
362			`if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))`
363			`break;`
364
365			`if (optname == IPV6_ADD_MEMBERSHIP)`
366			`retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);`
367			`else`
368			`retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);`
369			`break;`
370			`}`
371			`case IPV6_JOIN_ANYCAST:`
372			`case IPV6_LEAVE_ANYCAST:`
373			`{`
374			`struct ipv6_mreq mreq;`
375
376			`if (optlen != sizeof(struct ipv6_mreq))`
377			`goto e_inval;`
378
379			`retv = -EFAULT;`
380			`if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))`
381			`break;`
382
383			`if (optname == IPV6_JOIN_ANYCAST)`
384			`retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);`
385			`else`
386			`retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);`
387			`break;`
388			`}`
389			`case MCAST_JOIN_GROUP:`
390			`case MCAST_LEAVE_GROUP:`
391			`{`
392			`struct group_req greq;`
393			`struct sockaddr_in6 *psin6;`
394
395			`retv = -EFAULT;`
396			`if (copy_from_user(&greq, optval, sizeof(struct group_req)))`
397			`break;`
398			`if (greq.gr_group.ss_family != AF_INET6) {`
399			`retv = -EADDRNOTAVAIL;`
400			`break;`
401			`}`
402			`psin6 = (struct sockaddr_in6 *)&greq.gr_group;`
403			`if (optname == MCAST_JOIN_GROUP)`
404			`retv = ipv6_sock_mc_join(sk, greq.gr_interface,`
405			`&psin6->sin6_addr);`
406			`else`
407			`retv = ipv6_sock_mc_drop(sk, greq.gr_interface,`
408			`&psin6->sin6_addr);`
409			`break;`
410			`}`
411			`case MCAST_JOIN_SOURCE_GROUP:`
412			`case MCAST_LEAVE_SOURCE_GROUP:`
413			`case MCAST_BLOCK_SOURCE:`
414			`case MCAST_UNBLOCK_SOURCE:`
415			`{`
416			`struct group_source_req greqs;`
417			`int omode, add;`
418
419			`if (optlen != sizeof(struct group_source_req))`
420			`goto e_inval;`
421			`if (copy_from_user(&greqs, optval, sizeof(greqs))) {`
422			`retv = -EFAULT;`
423			`break;`
424			`}`
425			`if (greqs.gsr_group.ss_family != AF_INET6 \|\|`
426			`greqs.gsr_source.ss_family != AF_INET6) {`
427			`retv = -EADDRNOTAVAIL;`
428			`break;`
429			`}`
430			`if (optname == MCAST_BLOCK_SOURCE) {`
431			`omode = MCAST_EXCLUDE;`
432			`add = 1;`
433			`} else if (optname == MCAST_UNBLOCK_SOURCE) {`
434			`omode = MCAST_EXCLUDE;`
435			`add = 0;`
436			`} else if (optname == MCAST_JOIN_SOURCE_GROUP) {`
437			`struct sockaddr_in6 *psin6;`
438
439			`psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;`
440			`retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,`
441			`&psin6->sin6_addr);`
442			`if (retv)`
443			`break;`
444			`omode = MCAST_INCLUDE;`
445			`add = 1;`
446			`} else /IP_DROP_SOURCE_MEMBERSHIP / {`
447			`omode = MCAST_INCLUDE;`
448			`add = 0;`
449			`}`
450			`retv = ip6_mc_source(add, omode, sk, &greqs);`
451			`break;`
452			`}`
453			`case MCAST_MSFILTER:`
454			`{`
455			`extern int sysctl_optmem_max;`
456			`extern int sysctl_mld_max_msf;`
457			`struct group_filter *gsf;`
458
459			`if (optlen < GROUP_FILTER_SIZE(0))`
460			`goto e_inval;`
461			`if (optlen > sysctl_optmem_max) {`
462			`retv = -ENOBUFS;`
463			`break;`
464			`}`
465			`gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);`
466			`if (gsf == 0) {`
467			`retv = -ENOBUFS;`
468			`break;`
469			`}`
470			`retv = -EFAULT;`
471			`if (copy_from_user(gsf, optval, optlen)) {`
472			`kfree(gsf);`
473			`break;`
474			`}`
475			`/* numsrc >= (4G-140)/128 overflow in 32 bits */`
476			`if (gsf->gf_numsrc >= 0x1ffffffU \|\|`
477			`gsf->gf_numsrc > sysctl_mld_max_msf) {`
478			`kfree(gsf);`
479			`retv = -ENOBUFS;`
480			`break;`
481			`}`
482			`if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {`
483			`kfree(gsf);`
484			`retv = -EINVAL;`
485			`break;`
486			`}`
487			`retv = ip6_mc_msfilter(sk, gsf);`
488			`kfree(gsf);`
489
490			`break;`
491			`}`
492			`case IPV6_ROUTER_ALERT:`
493			`retv = ip6_ra_control(sk, val, NULL);`
494			`break;`
495			`case IPV6_MTU_DISCOVER:`
496			`if (val<0 \|\| val>2)`
497			`goto e_inval;`
498			`np->pmtudisc = val;`
499			`retv = 0;`
500			`break;`
501			`case IPV6_MTU:`
502			`if (val && val < IPV6_MIN_MTU)`
503			`goto e_inval;`
504			`np->frag_size = val;`
505			`retv = 0;`
506			`break;`
507			`case IPV6_RECVERR:`
508			`np->recverr = valbool;`
509			`if (!val)`
510			`skb_queue_purge(&sk->error_queue);`
511			`retv = 0;`
512			`break;`
513			`case IPV6_FLOWINFO_SEND:`
514			`np->sndflow = valbool;`
515			`retv = 0;`
516			`break;`
517			`case IPV6_FLOWLABEL_MGR:`
518			`retv = ipv6_flowlabel_opt(sk, optval, optlen);`
519			`break;`
520
521			`#ifdef CONFIG_NETFILTER`
522			`default:`
523			`retv = nf_setsockopt(sk, PF_INET6, optname, optval,`
524			`optlen);`
525			`break;`
526			`#endif`
527
528			`}`
529			`release_sock(sk);`
530
531			`out:`
532			`return retv;`
533
534			`e_inval:`
535			`release_sock(sk);`
536			`return -EINVAL;`
537			`}`
538
539			`int ipv6_getsockopt(struct sock sk, int level, int optname, char optval,`
540			`int *optlen)`
541			`{`
542			`struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;`
543			`int len;`
544			`int val;`
545
546			`if(level==SOL_IP && sk->type != SOCK_RAW)`
547			`return udp_prot.getsockopt(sk, level, optname, optval, optlen);`
548			`if(level!=SOL_IPV6)`
549			`return -ENOPROTOOPT;`
550			`if (get_user(len, optlen))`
551			`return -EFAULT;`
552			`switch (optname) {`
553			`case IPV6_PKTOPTIONS:`
554			`{`
555			`struct msghdr msg;`
556			`struct sk_buff *skb;`
557
558			`if (sk->type != SOCK_STREAM)`
559			`return -ENOPROTOOPT;`
560
561			`msg.msg_control = optval;`
562			`msg.msg_controllen = len;`
563			`msg.msg_flags = 0;`
564
565			`lock_sock(sk);`
566			`skb = np->pktoptions;`
567			`if (skb)`
568			`atomic_inc(&skb->users);`
569			`release_sock(sk);`
570
571			`if (skb) {`
572			`int err = datagram_recv_ctl(sk, &msg, skb);`
573			`kfree_skb(skb);`
574			`if (err)`
575			`return err;`
576			`} else {`
577			`if (np->rxopt.bits.rxinfo) {`
578			`struct in6_pktinfo src_info;`
579			`src_info.ipi6_ifindex = np->mcast_oif;`
580			`ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);`
581			`put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);`
582			`}`
583			`if (np->rxopt.bits.rxhlim) {`
584			`int hlim = np->mcast_hops;`
585			`put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);`
586			`}`
587			`}`
588			`len -= msg.msg_controllen;`
589			`return put_user(len, optlen);`
590			`}`
591			`case IPV6_MTU:`
592			`{`
593			`struct dst_entry *dst;`
594			`val = 0;`
595			`lock_sock(sk);`
596			`dst = sk_dst_get(sk);`
597			`if (dst) {`
598			`val = dst->pmtu;`
599			`dst_release(dst);`
600			`}`
601			`release_sock(sk);`
602			`if (!val)`
603			`return -ENOTCONN;`
604			`break;`
605			`}`
606
607			`case IPV6_V6ONLY:`
608			`val = np->ipv6only;`
609			`break;`
610
611			`case IPV6_PKTINFO:`
612			`val = np->rxopt.bits.rxinfo;`
613			`break;`
614			`case MCAST_MSFILTER:`
615			`{`
616			`struct group_filter gsf;`
617			`int err;`
618
619			`if (len < GROUP_FILTER_SIZE(0))`
620			`return -EINVAL;`
621			`if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))`
622			`return -EFAULT;`
623			`lock_sock(sk);`
624			`err = ip6_mc_msfget(sk, &gsf,`
625			`(struct group_filter *)optval, optlen);`
626			`release_sock(sk);`
627			`return err;`
628			`}`
629
630			`case IPV6_HOPLIMIT:`
631			`val = np->rxopt.bits.rxhlim;`
632			`break;`
633
634			`case IPV6_RTHDR:`
635			`val = np->rxopt.bits.srcrt;`
636			`break;`
637
638			`case IPV6_HOPOPTS:`
639			`val = np->rxopt.bits.hopopts;`
640			`break;`
641
642			`case IPV6_AUTHHDR:`
643			`val = np->rxopt.bits.authhdr;`
644			`break;`
645
646			`case IPV6_DSTOPTS:`
647			`val = np->rxopt.bits.dstopts;`
648			`break;`
649
650			`case IPV6_FLOWINFO:`
651			`val = np->rxopt.bits.rxflow;`
652			`break;`
653
654			`case IPV6_UNICAST_HOPS:`
655			`val = np->hop_limit;`
656			`break;`
657
658			`case IPV6_MULTICAST_HOPS:`
659			`val = np->mcast_hops;`
660			`break;`
661
662			`case IPV6_MULTICAST_LOOP:`
663			`val = np->mc_loop;`
664			`break;`
665
666			`case IPV6_MULTICAST_IF:`
667			`val = np->mcast_oif;`
668			`break;`
669
670			`case IPV6_MTU_DISCOVER:`
671			`val = np->pmtudisc;`
672			`break;`
673
674			`case IPV6_RECVERR:`
675			`val = np->recverr;`
676			`break;`
677
678			`case IPV6_FLOWINFO_SEND:`
679			`val = np->sndflow;`
680			`break;`
681
682			`default:`
683			`#ifdef CONFIG_NETFILTER`
684			`lock_sock(sk);`
685			`val = nf_getsockopt(sk, PF_INET6, optname, optval,`
686			`&len);`
687			`release_sock(sk);`
688			`if (val >= 0)`
689			`val = put_user(len, optlen);`
690			`return val;`
691			`#else`
692			`return -EINVAL;`
693			`#endif`
694			`}`
695			`len = min_t(unsigned int, sizeof(int), len);`
696			`if(put_user(len, optlen))`
697			`return -EFAULT;`
698			`if(copy_to_user(optval,&val,len))`
699			`return -EFAULT;`
700			`return 0;`
701			`}`
702
703			`#if defined(MODULE) && defined(CONFIG_SYSCTL)`
704
705			`/*`
706			`* sysctl registration functions defined in sysctl_net_ipv6.c`
707			`*/`
708
709			`extern void ipv6_sysctl_register(void);`
710			`extern void ipv6_sysctl_unregister(void);`
711			`#endif`
712
713			`void __init ipv6_packet_init(void)`
714			`{`
715			`dev_add_pack(&ipv6_packet_type);`
716			`}`
717
718			`void __init ipv6_netdev_notif_init(void)`
719			`{`
720			`register_netdevice_notifier(&ipv6_dev_notf);`
721			`}`
722
723			`#ifdef MODULE`
724			`void ipv6_packet_cleanup(void)`
725			`{`
726			`dev_remove_pack(&ipv6_packet_type);`
727			`}`
728
729			`void ipv6_netdev_notif_cleanup(void)`
730			`{`
731			`unregister_netdevice_notifier(&ipv6_dev_notf);`
732			`}`
733			`#endif`