コード例 #1
0
ファイル: af_mhost.c プロジェクト: spencersevilla/mnet
int mhost_rcv_saddr_equal(const struct sock *sk1, const struct sock *sk2)
{
    struct inet_sock *inet1 = inet_sk(sk1), *inet2 = inet_sk(sk2);
    
    return  (!ipv6_only_sock(sk2)  &&
             (!inet1->inet_rcv_saddr || !inet2->inet_rcv_saddr ||
              inet1->inet_rcv_saddr == inet2->inet_rcv_saddr));
}
コード例 #2
0
/* UDP is nearly always wildcards out the wazoo, it makes no sense to try
 * harder than this. -DaveM
 */
struct sock *udp_v4_lookup_longway(u32 saddr, u16 sport, u32 daddr, u16 dport, int dif)
{
	struct sock *sk, *result = NULL;
	unsigned short hnum = ntohs(dport);
	int badness = -1;

	for(sk = udp_hash[hnum & (UDP_HTABLE_SIZE - 1)]; sk != NULL; sk = sk->next) {
		if(sk->num == hnum && !ipv6_only_sock(sk)) {
			int score;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
			score = sk->family == PF_INET ? 1 : 0;
#else
			score = 1;
#endif
			if(sk->rcv_saddr) {
				if(sk->rcv_saddr != daddr)
					continue;
				score+=2;
			}
			if(sk->daddr) {
				if(sk->daddr != saddr)
					continue;
				score+=2;
			}
			if(sk->dport) {
				if(sk->dport != sport)
					continue;
				score+=2;
			}
			if(sk->bound_dev_if) {
				if(sk->bound_dev_if != dif)
					continue;
				score+=2;
			}
			if(score == 9) {
				result = sk;
				break;
			} else if(score > badness) {
				result = sk;
				badness = score;
			}
		}
	}
	return result;
}
コード例 #3
0
static inline struct sock *udp_v4_mcast_next(struct sock *sk,
					     u16 loc_port, u32 loc_addr,
					     u16 rmt_port, u32 rmt_addr,
					     int dif)
{
	struct sock *s = sk;
	unsigned short hnum = ntohs(loc_port);
	for(; s; s = s->next) {
		if ((s->num != hnum)					||
		    (s->daddr && s->daddr!=rmt_addr)			||
		    (s->dport != rmt_port && s->dport != 0)			||
		    (s->rcv_saddr  && s->rcv_saddr != loc_addr)		||
		    ipv6_only_sock(s)					||
		    (s->bound_dev_if && s->bound_dev_if != dif))
			continue;
		if (!ip_mc_sf_allow(sk, loc_addr, rmt_addr, dif))
			continue;
		break;
  	}
  	return s;
}
コード例 #4
0
ファイル: inet_diag.c プロジェクト: mhei/linux
int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
                             struct inet_diag_msg *r, int ext,
                             struct user_namespace *user_ns,
                             bool net_admin)
{
    const struct inet_sock *inet = inet_sk(sk);

    if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
        goto errout;

    /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
     * hence this needs to be included regardless of socket family.
     */
    if (ext & (1 << (INET_DIAG_TOS - 1)))
        if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
            goto errout;

#if IS_ENABLED(CONFIG_IPV6)
    if (r->idiag_family == AF_INET6) {
        if (ext & (1 << (INET_DIAG_TCLASS - 1)))
            if (nla_put_u8(skb, INET_DIAG_TCLASS,
                           inet6_sk(sk)->tclass) < 0)
                goto errout;

        if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
                nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
            goto errout;
    }
#endif

    if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark))
        goto errout;

    r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
    r->idiag_inode = sock_i_ino(sk);

    return 0;
errout:
    return 1;
}
コード例 #5
0
ファイル: ipv6_sockglue.c プロジェクト: OpenHMR/Open-HMR600
int 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 (level == SOL_IP && sk->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 __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_TCP)
				break;

			if (sk->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->sk_protocol == IPPROTO_TCP) {
				struct tcp_sock *tp = tcp_sk(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;
				tp->af_specific = &ipv4_specific;
				sk->sk_socket->ops = &inet_stream_ops;
				sk->sk_family = PF_INET;
				tcp_sync_mss(sk, tp->pmtu_cookie);
			} else {
				local_bh_disable();
				sock_prot_dec_use(sk->sk_prot);
				sock_prot_inc_use(&udp_prot);
				local_bh_enable();
				sk->sk_prot = &udp_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;
#ifdef INET_REFCNT_DEBUG
			atomic_dec(&inet6_sock_nr);
#endif
			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_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_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->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->sk_type == SOCK_STREAM) {
			if (opt) {
				struct tcp_sock *tp = tcp_sk(sk);
				if (!((1 << sk->sk_state) &
				      (TCPF_LISTEN | TCPF_CLOSE))
				    && inet_sk(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->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 (sk->sk_bound_dev_if && sk->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->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;

#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;
}
コード例 #6
0
ファイル: ipv6_sockglue.c プロジェクト: garyvan/openwrt-1.6
static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
		    char __user *optval, unsigned int optlen)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct net *net = sock_net(sk);
	int val, valbool;
	int retv = -ENOPROTOOPT;

	if (optval == NULL)
		val=0;
	else {
		if (optlen >= sizeof(int)) {
			if (get_user(val, (int __user *) optval))
				return -EFAULT;
		} else
			val = 0;
	}

	valbool = (val!=0);

	if (ip6_mroute_opt(optname))
		return ip6_mroute_setsockopt(sk, optname, optval, optlen);

	lock_sock(sk);

	switch (optname) {

	case IPV6_ADDRFORM:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val == PF_INET) {
			struct ipv6_txoptions *opt;
			struct sk_buff *pktopt;

			if (sk->sk_type == SOCK_RAW)
				break;

			if (sk->sk_protocol == IPPROTO_UDP ||
			    sk->sk_protocol == IPPROTO_UDPLITE) {
				struct udp_sock *up = udp_sk(sk);
				if (up->pending == AF_INET6) {
					retv = -EBUSY;
					break;
				}
			} else if (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_inuse_add(net, sk->sk_prot, -1);
				sock_prot_inuse_add(net, &tcp_prot, 1);
				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_inuse_add(net, sk->sk_prot, -1);
				sock_prot_inuse_add(net, prot, 1);
				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);
			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 (optlen < sizeof(int) ||
		    inet_sk(sk)->inet_num)
			goto e_inval;
		np->ipv6only = valbool;
		retv = 0;
		break;

	case IPV6_RECVPKTINFO:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxinfo = valbool;
		retv = 0;
		break;

	case IPV6_2292PKTINFO:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxoinfo = valbool;
		retv = 0;
		break;

	case IPV6_RECVHOPLIMIT:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxhlim = valbool;
		retv = 0;
		break;

	case IPV6_2292HOPLIMIT:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxohlim = valbool;
		retv = 0;
		break;

	case IPV6_RECVRTHDR:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.srcrt = valbool;
		retv = 0;
		break;

	case IPV6_2292RTHDR:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.osrcrt = valbool;
		retv = 0;
		break;

	case IPV6_RECVHOPOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.hopopts = valbool;
		retv = 0;
		break;

	case IPV6_2292HOPOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.ohopopts = valbool;
		retv = 0;
		break;

	case IPV6_RECVDSTOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.dstopts = valbool;
		retv = 0;
		break;

	case IPV6_2292DSTOPTS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.odstopts = valbool;
		retv = 0;
		break;

	case IPV6_TCLASS:
		if (optlen < sizeof(int))
			goto e_inval;
		if (val < -1 || val > 0xff)
			goto e_inval;
		/* RFC 3542, 6.5: default traffic class of 0x0 */
		if (val == -1)
			val = 0;
		np->tclass = val;
		retv = 0;
		break;

	case IPV6_RECVTCLASS:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxtclass = valbool;
		retv = 0;
		break;

	case IPV6_FLOWINFO:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxflow = valbool;
		retv = 0;
		break;

	case IPV6_RECVPATHMTU:
		if (optlen < sizeof(int))
			goto e_inval;
		np->rxopt.bits.rxpmtu = valbool;
		retv = 0;
		break;

	case IPV6_TRANSPARENT:
		if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) &&
		    !ns_capable(net->user_ns, CAP_NET_RAW)) {
			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;
		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 && !ns_capable(net->user_ns, CAP_NET_RAW))
			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 */
		retv = -EINVAL;
		if (optname == IPV6_RTHDR && opt && opt->srcrt) {
			struct ipv6_rt_hdr *rthdr = opt->srcrt;
			switch (rthdr->type) {
#if IS_ENABLED(CONFIG_IPV6_MIP6)
			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;
		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 = ip6_datagram_send_ctl(net, sk, &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 == -1 ? IPV6_DEFAULT_MCASTHOPS : 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_UNICAST_IF:
	{
		struct net_device *dev = NULL;
		int ifindex;

		if (optlen != sizeof(int))
			goto e_inval;

		ifindex = (__force int)ntohl((__force __be32)val);
		if (ifindex == 0) {
			np->ucast_oif = 0;
			retv = 0;
			break;
		}

		dev = dev_get_by_index(net, ifindex);
		retv = -EADDRNOTAVAIL;
		if (!dev)
			break;
		dev_put(dev);

		retv = -EINVAL;
		if (sk->sk_bound_dev_if)
			break;

		np->ucast_oif = ifindex;
		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:
	{
		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 (!ns_capable(net->user_ns, 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;
		retv = 0;
		break;
	case IPV6_DONTFRAG:
		np->dontfrag = valbool;
		retv = 0;
		break;
	}

	release_sock(sk);

	return retv;

e_inval:
	release_sock(sk);
	return -EINVAL;
}
コード例 #7
0
ファイル: inet_diag.c プロジェクト: zefie/nxt_andx86_kernel
int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
		      struct sk_buff *skb, const struct inet_diag_req_v2 *req,
		      struct user_namespace *user_ns,
		      u32 portid, u32 seq, u16 nlmsg_flags,
		      const struct nlmsghdr *unlh)
{
	const struct inet_sock *inet = inet_sk(sk);
	const struct tcp_congestion_ops *ca_ops;
	const struct inet_diag_handler *handler;
	int ext = req->idiag_ext;
	struct inet_diag_msg *r;
	struct nlmsghdr  *nlh;
	struct nlattr *attr;
	void *info = NULL;

	handler = inet_diag_table[req->sdiag_protocol];
	BUG_ON(!handler);

	nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
			nlmsg_flags);
	if (!nlh)
		return -EMSGSIZE;

	r = nlmsg_data(nlh);
	BUG_ON(!sk_fullsock(sk));

	inet_diag_msg_common_fill(r, sk);
	r->idiag_state = sk->sk_state;
	r->idiag_timer = 0;
	r->idiag_retrans = 0;

	if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
		goto errout;

	/* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
	 * hence this needs to be included regardless of socket family.
	 */
	if (ext & (1 << (INET_DIAG_TOS - 1)))
		if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
			goto errout;

#if IS_ENABLED(CONFIG_IPV6)
	if (r->idiag_family == AF_INET6) {
		if (ext & (1 << (INET_DIAG_TCLASS - 1)))
			if (nla_put_u8(skb, INET_DIAG_TCLASS,
				       inet6_sk(sk)->tclass) < 0)
				goto errout;

		if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
		    nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
			goto errout;
	}
#endif

	r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
	r->idiag_inode = sock_i_ino(sk);

	if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
		struct inet_diag_meminfo minfo = {
			.idiag_rmem = sk_rmem_alloc_get(sk),
			.idiag_wmem = sk->sk_wmem_queued,
			.idiag_fmem = sk->sk_forward_alloc,
			.idiag_tmem = sk_wmem_alloc_get(sk),
		};

		if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
			goto errout;
	}

	if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
		if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
			goto errout;

	if (!icsk) {
		handler->idiag_get_info(sk, r, NULL);
		goto out;
	}

#define EXPIRES_IN_MS(tmo)  DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)

	if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
	    icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
	    icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
		r->idiag_timer = 1;
		r->idiag_retrans = icsk->icsk_retransmits;
		r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
	} else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
		r->idiag_timer = 4;
		r->idiag_retrans = icsk->icsk_probes_out;
		r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
	} else if (timer_pending(&sk->sk_timer)) {
		r->idiag_timer = 2;
		r->idiag_retrans = icsk->icsk_probes_out;
		r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
	} else {
		r->idiag_timer = 0;
		r->idiag_expires = 0;
	}
#undef EXPIRES_IN_MS

	if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
		attr = nla_reserve(skb, INET_DIAG_INFO,
				   handler->idiag_info_size);
		if (!attr)
			goto errout;

		info = nla_data(attr);
	}

	if (ext & (1 << (INET_DIAG_CONG - 1))) {
		int err = 0;

		rcu_read_lock();
		ca_ops = READ_ONCE(icsk->icsk_ca_ops);
		if (ca_ops)
			err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
		rcu_read_unlock();
		if (err < 0)
			goto errout;
	}

	handler->idiag_get_info(sk, r, info);

	if (sk->sk_state < TCP_TIME_WAIT) {
		union tcp_cc_info info;
		size_t sz = 0;
		int attr;

		rcu_read_lock();
		ca_ops = READ_ONCE(icsk->icsk_ca_ops);
		if (ca_ops && ca_ops->get_info)
			sz = ca_ops->get_info(sk, ext, &attr, &info);
		rcu_read_unlock();
		if (sz && nla_put(skb, attr, sz, &info) < 0)
			goto errout;
	}

out:
	nlmsg_end(skb, nlh);
	return 0;

errout:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(inet_sk_diag_fill);

static int inet_csk_diag_fill(struct sock *sk,
			      struct sk_buff *skb,
			      const struct inet_diag_req_v2 *req,
			      struct user_namespace *user_ns,
			      u32 portid, u32 seq, u16 nlmsg_flags,
			      const struct nlmsghdr *unlh)
{
	return inet_sk_diag_fill(sk, inet_csk(sk), skb, req,
				 user_ns, portid, seq, nlmsg_flags, unlh);
}

static int inet_twsk_diag_fill(struct sock *sk,
			       struct sk_buff *skb,
			       u32 portid, u32 seq, u16 nlmsg_flags,
			       const struct nlmsghdr *unlh)
{
	struct inet_timewait_sock *tw = inet_twsk(sk);
	struct inet_diag_msg *r;
	struct nlmsghdr *nlh;
	long tmo;

	nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
			nlmsg_flags);
	if (!nlh)
		return -EMSGSIZE;

	r = nlmsg_data(nlh);
	BUG_ON(tw->tw_state != TCP_TIME_WAIT);

	tmo = tw->tw_timer.expires - jiffies;
	if (tmo < 0)
		tmo = 0;

	inet_diag_msg_common_fill(r, sk);
	r->idiag_retrans      = 0;

	r->idiag_state	      = tw->tw_substate;
	r->idiag_timer	      = 3;
	r->idiag_expires      = jiffies_to_msecs(tmo);
	r->idiag_rqueue	      = 0;
	r->idiag_wqueue	      = 0;
	r->idiag_uid	      = 0;
	r->idiag_inode	      = 0;

	nlmsg_end(skb, nlh);
	return 0;
}

static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
			      u32 portid, u32 seq, u16 nlmsg_flags,
			      const struct nlmsghdr *unlh)
{
	struct inet_diag_msg *r;
	struct nlmsghdr *nlh;
	long tmo;

	nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
			nlmsg_flags);
	if (!nlh)
		return -EMSGSIZE;

	r = nlmsg_data(nlh);
	inet_diag_msg_common_fill(r, sk);
	r->idiag_state = TCP_SYN_RECV;
	r->idiag_timer = 1;
	r->idiag_retrans = inet_reqsk(sk)->num_retrans;

	BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
		     offsetof(struct sock, sk_cookie));

	tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
	r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
	r->idiag_rqueue	= 0;
	r->idiag_wqueue	= 0;
	r->idiag_uid	= 0;
	r->idiag_inode	= 0;

	nlmsg_end(skb, nlh);
	return 0;
}

static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
			const struct inet_diag_req_v2 *r,
			struct user_namespace *user_ns,
			u32 portid, u32 seq, u16 nlmsg_flags,
			const struct nlmsghdr *unlh)
{
	if (sk->sk_state == TCP_TIME_WAIT)
		return inet_twsk_diag_fill(sk, skb, portid, seq,
					   nlmsg_flags, unlh);

	if (sk->sk_state == TCP_NEW_SYN_RECV)
		return inet_req_diag_fill(sk, skb, portid, seq,
					  nlmsg_flags, unlh);

	return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
				  nlmsg_flags, unlh);
}

struct sock *inet_diag_find_one_icsk(struct net *net,
				     struct inet_hashinfo *hashinfo,
				     const struct inet_diag_req_v2 *req)
{
	struct sock *sk;

	if (req->sdiag_family == AF_INET)
		sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0],
				 req->id.idiag_dport, req->id.idiag_src[0],
				 req->id.idiag_sport, req->id.idiag_if);
#if IS_ENABLED(CONFIG_IPV6)
	else if (req->sdiag_family == AF_INET6) {
		if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
		    ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
			sk = inet_lookup(net, hashinfo, req->id.idiag_dst[3],
					 req->id.idiag_dport, req->id.idiag_src[3],
					 req->id.idiag_sport, req->id.idiag_if);
		else
			sk = inet6_lookup(net, hashinfo,
					  (struct in6_addr *)req->id.idiag_dst,
					  req->id.idiag_dport,
					  (struct in6_addr *)req->id.idiag_src,
					  req->id.idiag_sport,
					  req->id.idiag_if);
	}
#endif
	else
		return ERR_PTR(-EINVAL);

	if (!sk)
		return ERR_PTR(-ENOENT);

	if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
		sock_gen_put(sk);
		return ERR_PTR(-ENOENT);
	}

	return sk;
}
EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);

int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
			    struct sk_buff *in_skb,
			    const struct nlmsghdr *nlh,
			    const struct inet_diag_req_v2 *req)
{
	struct net *net = sock_net(in_skb->sk);
	struct sk_buff *rep;
	struct sock *sk;
	int err;

	sk = inet_diag_find_one_icsk(net, hashinfo, req);
	if (IS_ERR(sk))
		return PTR_ERR(sk);

	rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
	if (!rep) {
		err = -ENOMEM;
		goto out;
	}

	err = sk_diag_fill(sk, rep, req,
			   sk_user_ns(NETLINK_CB(in_skb).sk),
			   NETLINK_CB(in_skb).portid,
			   nlh->nlmsg_seq, 0, nlh);
	if (err < 0) {
		WARN_ON(err == -EMSGSIZE);
		nlmsg_free(rep);
		goto out;
	}
	err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
			      MSG_DONTWAIT);
	if (err > 0)
		err = 0;

out:
	if (sk)
		sock_gen_put(sk);

	return err;
}
EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);

static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
			       const struct nlmsghdr *nlh,
			       const struct inet_diag_req_v2 *req)
{
	const struct inet_diag_handler *handler;
	int err;

	handler = inet_diag_lock_handler(req->sdiag_protocol);
	if (IS_ERR(handler))
		err = PTR_ERR(handler);
	else if (cmd == SOCK_DIAG_BY_FAMILY)
		err = handler->dump_one(in_skb, nlh, req);
	else if (cmd == SOCK_DESTROY_BACKPORT && handler->destroy)
		err = handler->destroy(in_skb, req);
	else
		err = -EOPNOTSUPP;
	inet_diag_unlock_handler(handler);

	return err;
}

static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
{
	int words = bits >> 5;

	bits &= 0x1f;

	if (words) {
		if (memcmp(a1, a2, words << 2))
			return 0;
	}
	if (bits) {
		__be32 w1, w2;
		__be32 mask;

		w1 = a1[words];
		w2 = a2[words];

		mask = htonl((0xffffffff) << (32 - bits));

		if ((w1 ^ w2) & mask)
			return 0;
	}

	return 1;
}
コード例 #8
0
ファイル: ipv6_sockglue.c プロジェクト: liuxueyang/Linux-Unix
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 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;
}
コード例 #9
0
/* Grrr, addr_type already calculated by caller, but I don't want
 * to add some silly "cookie" argument to this method just for that.
 */
static int udp_v6_get_port(struct sock *sk, unsigned short snum)
{
	write_lock_bh(&udp_hash_lock);
	if (snum == 0) {
		int best_size_so_far, best, result, i;

		if (udp_port_rover > sysctl_local_port_range[1] ||
		    udp_port_rover < sysctl_local_port_range[0])
			udp_port_rover = sysctl_local_port_range[0];
		best_size_so_far = 32767;
		best = result = udp_port_rover;
		for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
			struct sock *sk;
			int size;

			sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
			if (!sk) {
				if (result > sysctl_local_port_range[1])
					result = sysctl_local_port_range[0] +
						((result - sysctl_local_port_range[0]) &
						 (UDP_HTABLE_SIZE - 1));
				goto gotit;
			}
			size = 0;
			do {
				if (++size >= best_size_so_far)
					goto next;
			} while ((sk = sk->next) != NULL);
			best_size_so_far = size;
			best = result;
		next:;
		}
		result = best;
		for(;; result += UDP_HTABLE_SIZE) {
			if (result > sysctl_local_port_range[1])
				result = sysctl_local_port_range[0]
					+ ((result - sysctl_local_port_range[0]) &
					   (UDP_HTABLE_SIZE - 1));
			if (!udp_lport_inuse(result))
				break;
		}
gotit:
		udp_port_rover = snum = result;
	} else {
		struct sock *sk2;
		int sk_reuse, sk2_reuse;
		int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr),
		    addr_type2;
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
		uid_t sk_uid = sock_i_uid_t(sk),
		      sk2_uid;
#endif

		sk_reuse = 0;
		if (sk->reuse)
			sk_reuse |= 1;
#ifdef SO_REUSEPORT
		if (sk->reuseport)
			sk_reuse |= 2;
#endif
		if (sk_reuse &&
		    (addr_type != IPV6_ADDR_MAPPED ? (addr_type & IPV6_ADDR_MULTICAST) : MULTICAST(sk->rcv_saddr)))
			sk_reuse |= 4;

		for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
		     sk2 != NULL;
		     sk2 = sk2->next) {
#if 1	/* XXX: should be recoded like 2.4.21 */
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
			int uid_ok;
#endif
			int both_specified = 0;

			if (sk2->num != snum ||
			    sk2 == sk ||
			    (sk2->bound_dev_if && sk->bound_dev_if &&
			     sk2->bound_dev_if != sk->bound_dev_if))
				continue;
#if 0
			if (sk2->family != AF_INET6 && sk2->family != AF_INET)
				continue;
#endif

			addr_type2 = sk2->family == AF_INET6 ? ipv6_addr_type(&sk2->net_pinfo.af_inet6.rcv_saddr) : IPV6_ADDR_MAPPED;
#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
			sk2_uid = sock_i_uid_t(sk2);
#endif

			if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) &&
			    (addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr)) {
				if (addr_type2 == IPV6_ADDR_MAPPED || addr_type == IPV6_ADDR_MAPPED) {
					if (addr_type2 != addr_type ||
					    sk2->rcv_saddr != sk->rcv_saddr)
						continue;
				} else {
					if (ipv6_addr_cmp(&sk2->net_pinfo.af_inet6.rcv_saddr,
							  &sk->net_pinfo.af_inet6.rcv_saddr))
						continue;
				}
				both_specified = 1;
			}

#if defined(CONFIG_NET_RESTRICTED_REUSE) || defined(CONFIG_IPV6_RESTRICTED_DOUBLE_BIND)
			uid_ok = sk2_uid == (uid_t) -1 || sk_uid == sk2_uid;
#endif

			if ((addr_type2 == IPV6_ADDR_MAPPED && 
			     addr_type != IPV6_ADDR_MAPPED && sk->net_pinfo.af_inet6.ipv6only) ||
			    (addr_type == IPV6_ADDR_MAPPED &&
			     addr_type2 != IPV6_ADDR_MAPPED && sk2->net_pinfo.af_inet6.ipv6only)) {
#ifdef CONFIG_IPV6_RESTRICTED_DOUBLE_BIND
				if (sysctl_ipv6_bindv6only_restriction == 0 || uid_ok)
					continue;
#else
				continue;
#endif
			}

			sk2_reuse = 0;
			if (sk2->reuse)
				sk2_reuse |= 1;
#ifdef SO_REUSEPORT
			if (sk2->reuseport)
				sk2_reuse |= 2;
#endif
			if (sk2_reuse &&
			    (addr_type2 != IPV6_ADDR_MAPPED ? (addr_type2 & IPV6_ADDR_MULTICAST) : MULTICAST(sk2->rcv_saddr)))
				sk2_reuse |= 4;

			if (sk2_reuse & sk_reuse & 3) {	/* NOT && */
				if (sk2_reuse & sk_reuse & 4)
					continue;
#ifdef CONFIG_NET_RESTRICTED_REUSE
				if (!uid_ok)
					goto fail;
#endif
#ifdef SO_REUSEPORT
				if (sk2_reuse & sk_reuse & 2)
					continue;
#endif
				if (both_specified) {
					int addr_type2d = sk2->family == AF_INET6 ? ipv6_addr_type(&sk2->net_pinfo.af_inet6.daddr) : IPV6_ADDR_MAPPED;
					if (addr_type2d != IPV6_ADDR_MAPPED ? addr_type2d != IPV6_ADDR_ANY : sk2->daddr)
						continue;
				} else {
					if ((addr_type2 != IPV6_ADDR_MAPPED ? addr_type2 != IPV6_ADDR_ANY : sk2->rcv_saddr) || 
					    (addr_type != IPV6_ADDR_MAPPED ? addr_type != IPV6_ADDR_ANY : sk->rcv_saddr))
						continue;
				}
			}
			goto fail;
#else	/* XXX: should be recoded like 2.4.21 */
			if (sk2->num == snum &&
			    sk2 != sk &&
			    (!sk2->bound_dev_if ||
			     !sk->bound_dev_if ||
			     sk2->bound_dev_if == sk->bound_dev_if) &&
			    ((!sk2->rcv_saddr && !ipv6_only_sock(sk)) ||
			     (sk2->family == AF_INET6 && 
			      ipv6_addr_any(&sk2->net_pinfo.af_inet6.rcv_saddr) &&
			      !(ipv6_only_sock(sk2) && addr_type == IPV6_ADDR_MAPPED)) ||
			     (addr_type == IPV6_ADDR_ANY && 
			      (!ipv6_only_sock(sk) || 
			       !(sk2->family == AF_INET6 ? (ipv6_addr_type(&sk2->net_pinfo.af_inet6.rcv_saddr) == IPV6_ADDR_MAPPED) : 1))) ||
			     (sk2->family == AF_INET6 && 
			      !ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr,
					     &sk2->net_pinfo.af_inet6.rcv_saddr)) ||
			     (addr_type == IPV6_ADDR_MAPPED &&
			      !ipv6_only_sock(sk2) &&
			      (!sk2->rcv_saddr || 
			       !sk->rcv_saddr ||
			       sk->rcv_saddr == sk2->rcv_saddr))) &&
			    (!sk2->reuse || !sk->reuse))
				goto fail;
#endif	/* XXX: should be recoded like 2.4.21 */
		}
	}

	sk->num = snum;
	if (sk->pprev == NULL) {
		struct sock **skp = &udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
		if ((sk->next = *skp) != NULL)
			(*skp)->pprev = &sk->next;
		*skp = sk;
		sk->pprev = skp;
		sock_prot_inc_use(sk->prot);
		sock_hold(sk);
	}
	write_unlock_bh(&udp_hash_lock);
	return 0;

fail:
	write_unlock_bh(&udp_hash_lock);
	return 1;
}
コード例 #10
0
static int udp_v4_get_port(struct sock *sk, unsigned short snum)
{
	write_lock_bh(&udp_hash_lock);
	if (snum == 0) {
		int best_size_so_far, best, result, i;

		if (udp_port_rover > sysctl_local_port_range[1] ||
		    udp_port_rover < sysctl_local_port_range[0])
			udp_port_rover = sysctl_local_port_range[0];
		best_size_so_far = 32767;
		best = result = udp_port_rover;
		for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
			struct sock *sk;
			int size;

			sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
			if (!sk) {
				if (result > sysctl_local_port_range[1])
					result = sysctl_local_port_range[0] +
						((result - sysctl_local_port_range[0]) &
						 (UDP_HTABLE_SIZE - 1));
				goto gotit;
			}
			size = 0;
			do {
				if (++size >= best_size_so_far)
					goto next;
			} while ((sk = sk->next) != NULL);
			best_size_so_far = size;
			best = result;
		next:;
		}
		result = best;
		for(i = 0; i < (1 << 16) / UDP_HTABLE_SIZE; i++, result += UDP_HTABLE_SIZE) {
			if (result > sysctl_local_port_range[1])
				result = sysctl_local_port_range[0]
					+ ((result - sysctl_local_port_range[0]) &
					   (UDP_HTABLE_SIZE - 1));
			if (!udp_lport_inuse(result))
				break;
		}
		if (i >= (1 << 16) / UDP_HTABLE_SIZE)
			goto fail;
gotit:
		udp_port_rover = snum = result;
	} else {
		struct sock *sk2;

		for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
		     sk2 != NULL;
		     sk2 = sk2->next) {
			if (sk2->num == snum &&
			    sk2 != sk &&
			    !ipv6_only_sock(sk2) &&
			    sk2->bound_dev_if == sk->bound_dev_if &&
			    (!sk2->rcv_saddr ||
			     !sk->rcv_saddr ||
			     sk2->rcv_saddr == sk->rcv_saddr) &&
			    (!sk2->reuse || !sk->reuse))
				goto fail;
		}
	}
	sk->num = snum;
	if (sk->pprev == NULL) {
		struct sock **skp = &udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
		if ((sk->next = *skp) != NULL)
			(*skp)->pprev = &sk->next;
		*skp = sk;
		sk->pprev = skp;
		sock_prot_inc_use(sk->prot);
		sock_hold(sk);
	}
	write_unlock_bh(&udp_hash_lock);
	return 0;

fail:
	write_unlock_bh(&udp_hash_lock);
	return 1;
}