Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 704 insertions, 0 deletions

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
new file mode 100644
index 000000000000..279ab86be662
--- /dev/null
+++ b/net/ipv6/ipv6_sockglue.c
@@ -0,0 +1,704 @@
+/*
+ *	IPv6 BSD socket options interface
+ *	Linux INET6 implementation 
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>	
+ *
+ *	Based on linux/net/ipv4/ip_sockglue.c
+ *
+ *	$Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ *
+ *	FIXME: Make the setsockopt code POSIX compliant: That is
+ *
+ *	o	Return -EINVAL for setsockopt of short lengths
+ *	o	Truncate getsockopt returns
+ *	o	Return an optlen of the truncated length if need be
+ *
+ *	Changes:
+ *	David L Stevens <dlstevens@us.ibm.com>:
+ *		- added multicast source filtering API for MLDv2
+ */
+
+#include <linux/module.h>
+#include <linux/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 <net/xfrm.h>
+
+#include <asm/uaccess.h>
+
+DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
+
+static struct packet_type ipv6_packet_type = {
+	.type = __constant_htons(ETH_P_IPV6), 
+	.func = ipv6_rcv,
+};
+
+struct ip6_ra_chain *ip6_ra_chain;
+DEFINE_RWLOCK(ip6_ra_lock);
+
+int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
+{
+	struct ip6_ra_chain *ra, *new_ra, **rap;
+
+	/* RA packet may be delivered ONLY to IPPROTO_RAW socket */
+	if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
+		return -EINVAL;
+
+	new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
+
+	write_lock_bh(&ip6_ra_lock);
+	for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
+		if (ra->sk == sk) {
+			if (sel>=0) {
+				write_unlock_bh(&ip6_ra_lock);
+				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 __user *optval, int __user *optlen);
+
+
+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 = 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;
+}
+
+int ipv6_getsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int __user *optlen)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	int len;
+	int val;
+
+	if (level == SOL_IP && sk->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_ADDRFORM:
+		if (sk->sk_protocol != IPPROTO_UDP &&
+		    sk->sk_protocol != IPPROTO_TCP)
+			return -EINVAL;
+		if (sk->sk_state != TCP_ESTABLISHED)
+			return -ENOTCONN;
+		val = sk->sk_family;
+		break;
+	case MCAST_MSFILTER:
+	{
+		struct group_filter gsf;
+		int err;
+
+		if (len < GROUP_FILTER_SIZE(0))
+			return -EINVAL;
+		if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
+			return -EFAULT;
+		lock_sock(sk);
+		err = ip6_mc_msfget(sk, &gsf,
+			(struct group_filter __user *)optval, optlen);
+		release_sock(sk);
+		return err;
+	}
+
+	case IPV6_PKTOPTIONS:
+	{
+		struct msghdr msg;
+		struct sk_buff *skb;
+
+		if (sk->sk_type != SOCK_STREAM)
+			return -ENOPROTOOPT;
+
+		msg.msg_control = optval;
+		msg.msg_controllen = len;
+		msg.msg_flags = 0;
+
+		lock_sock(sk);
+		skb = np->pktoptions;
+		if (skb)
+			atomic_inc(&skb->users);
+		release_sock(sk);
+
+		if (skb) {
+			int err = datagram_recv_ctl(sk, &msg, skb);
+			kfree_skb(skb);
+			if (err)
+				return err;
+		} else {
+			if (np->rxopt.bits.rxinfo) {
+				struct in6_pktinfo src_info;
+				src_info.ipi6_ifindex = np->mcast_oif;
+				ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
+				put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
+			}
+			if (np->rxopt.bits.rxhlim) {
+				int hlim = np->mcast_hops;
+				put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
+			}
+		}
+		len -= msg.msg_controllen;
+		return put_user(len, optlen);
+	}
+	case IPV6_MTU:
+	{
+		struct dst_entry *dst;
+		val = 0;	
+		lock_sock(sk);
+		dst = sk_dst_get(sk);
+		if (dst) {
+			val = dst_mtu(dst);
+			dst_release(dst);
+		}
+		release_sock(sk);
+		if (!val)
+			return -ENOTCONN;
+		break;
+	}
+
+	case IPV6_V6ONLY:
+		val = np->ipv6only;
+		break;
+
+	case IPV6_PKTINFO:
+		val = np->rxopt.bits.rxinfo;
+		break;
+
+	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_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;
+}
+
+void __init ipv6_packet_init(void)
+{
+	dev_add_pack(&ipv6_packet_type);
+}
+
+void ipv6_packet_cleanup(void)
+{
+	dev_remove_pack(&ipv6_packet_type);
+}