예제 #1
0
파일: raw.c 프로젝트: OpenHMR/Open-HMR600
static void raw_v4_hash(struct sock *sk)
{
	struct hlist_head *head = &raw_v4_htable[inet_sk(sk)->num &
						 (RAWV4_HTABLE_SIZE - 1)];

	write_lock_bh(&raw_v4_lock);
	sk_add_node(sk, head);
	sock_prot_inc_use(sk->sk_prot);
	write_unlock_bh(&raw_v4_lock);
}
예제 #2
0
파일: raw.c 프로젝트: Mr-Aloof/wl500g
void raw_hash_sk(struct sock *sk, struct raw_hashinfo *h)
{
	struct hlist_head *head;

	head = &h->ht[inet_sk(sk)->num & (RAW_HTABLE_SIZE - 1)];

	write_lock_bh(&h->lock);
	sk_add_node(sk, head);
	sock_prot_inc_use(sk->sk_prot);
	write_unlock_bh(&h->lock);
}
예제 #3
0
파일: raw.c 프로젝트: nhanh0/hah
static void raw_v6_hash(struct sock *sk)
{
	struct sock **skp = &raw_v6_htable[sk->num & (RAWV6_HTABLE_SIZE - 1)];

	write_lock_bh(&raw_v6_lock);
	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(&raw_v6_lock);
}
예제 #4
0
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;
}
예제 #5
0
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_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_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_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;
}
예제 #6
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 addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr);

        for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
                sk2 != NULL;
                sk2 = sk2->next) {
            if (sk2->num == snum &&
                    sk2 != sk &&
                    sk2->bound_dev_if == sk->bound_dev_if &&
                    (!sk2->rcv_saddr ||
                     addr_type == IPV6_ADDR_ANY ||
                     !ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr,
                                    &sk2->net_pinfo.af_inet6.rcv_saddr) ||
                     (addr_type == IPV6_ADDR_MAPPED &&
                      sk2->family == AF_INET &&
                      sk->rcv_saddr == sk2->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;
}
예제 #7
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;
}
예제 #8
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;
}