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, 1093 insertions, 0 deletions

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
new file mode 100644
index 000000000000..47012b93cad2
--- /dev/null
+++ b/net/ipv4/ip_sockglue.c
@@ -0,0 +1,1093 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		The IP to API glue.
+ *		
+ * Version:	$Id: ip_sockglue.c,v 1.62 2002/02/01 22:01:04 davem Exp $
+ *
+ * Authors:	see ip.c
+ *
+ * Fixes:
+ *		Many		:	Split from ip.c , see ip.c for history.
+ *		Martin Mares	:	TOS setting fixed.
+ *		Alan Cox	:	Fixed a couple of oopses in Martin's 
+ *					TOS tweaks.
+ *		Mike McLagan	:	Routing by source
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/icmp.h>
+#include <linux/netdevice.h>
+#include <net/sock.h>
+#include <net/ip.h>
+#include <net/icmp.h>
+#include <net/tcp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/igmp.h>
+#include <linux/netfilter.h>
+#include <linux/route.h>
+#include <linux/mroute.h>
+#include <net/route.h>
+#include <net/xfrm.h>
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#include <net/transp_v6.h>
+#endif
+
+#include <linux/errqueue.h>
+#include <asm/uaccess.h>
+
+#define IP_CMSG_PKTINFO		1
+#define IP_CMSG_TTL		2
+#define IP_CMSG_TOS		4
+#define IP_CMSG_RECVOPTS	8
+#define IP_CMSG_RETOPTS		16
+
+/*
+ *	SOL_IP control messages.
+ */
+
+static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
+{
+	struct in_pktinfo info;
+	struct rtable *rt = (struct rtable *)skb->dst;
+
+	info.ipi_addr.s_addr = skb->nh.iph->daddr;
+	if (rt) {
+		info.ipi_ifindex = rt->rt_iif;
+		info.ipi_spec_dst.s_addr = rt->rt_spec_dst;
+	} else {
+		info.ipi_ifindex = 0;
+		info.ipi_spec_dst.s_addr = 0;
+	}
+
+	put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
+}
+
+static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb)
+{
+	int ttl = skb->nh.iph->ttl;
+	put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl);
+}
+
+static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb)
+{
+	put_cmsg(msg, SOL_IP, IP_TOS, 1, &skb->nh.iph->tos);
+}
+
+static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
+{
+	if (IPCB(skb)->opt.optlen == 0)
+		return;
+
+	put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen, skb->nh.iph+1);
+}
+
+
+static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
+{
+	unsigned char optbuf[sizeof(struct ip_options) + 40];
+	struct ip_options * opt = (struct ip_options*)optbuf;
+
+	if (IPCB(skb)->opt.optlen == 0)
+		return;
+
+	if (ip_options_echo(opt, skb)) {
+		msg->msg_flags |= MSG_CTRUNC;
+		return;
+	}
+	ip_options_undo(opt);
+
+	put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data);
+}
+
+
+void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
+{
+	struct inet_sock *inet = inet_sk(skb->sk);
+	unsigned flags = inet->cmsg_flags;
+
+	/* Ordered by supposed usage frequency */
+	if (flags & 1)
+		ip_cmsg_recv_pktinfo(msg, skb);
+	if ((flags>>=1) == 0)
+		return;
+
+	if (flags & 1)
+		ip_cmsg_recv_ttl(msg, skb);
+	if ((flags>>=1) == 0)
+		return;
+
+	if (flags & 1)
+		ip_cmsg_recv_tos(msg, skb);
+	if ((flags>>=1) == 0)
+		return;
+
+	if (flags & 1)
+		ip_cmsg_recv_opts(msg, skb);
+	if ((flags>>=1) == 0)
+		return;
+
+	if (flags & 1)
+		ip_cmsg_recv_retopts(msg, skb);
+}
+
+int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc)
+{
+	int err;
+	struct cmsghdr *cmsg;
+
+	for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
+		if (!CMSG_OK(msg, cmsg))
+			return -EINVAL;
+		if (cmsg->cmsg_level != SOL_IP)
+			continue;
+		switch (cmsg->cmsg_type) {
+		case IP_RETOPTS:
+			err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
+			err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40, 0);
+			if (err)
+				return err;
+			break;
+		case IP_PKTINFO:
+		{
+			struct in_pktinfo *info;
+			if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo)))
+				return -EINVAL;
+			info = (struct in_pktinfo *)CMSG_DATA(cmsg);
+			ipc->oif = info->ipi_ifindex;
+			ipc->addr = info->ipi_spec_dst.s_addr;
+			break;
+		}
+		default:
+			return -EINVAL;
+		}
+	}
+	return 0;
+}
+
+
+/* Special input handler for packets caught by router alert option.
+   They are selected only by protocol field, and then processed likely
+   local ones; but only if someone wants them! Otherwise, router
+   not running rsvpd will kill RSVP.
+
+   It is user level problem, what it will make with them.
+   I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
+   but receiver should be enough clever f.e. to forward mtrace requests,
+   sent to multicast group to reach destination designated router.
+ */
+struct ip_ra_chain *ip_ra_chain;
+DEFINE_RWLOCK(ip_ra_lock);
+
+int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *))
+{
+	struct ip_ra_chain *ra, *new_ra, **rap;
+
+	if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num == IPPROTO_RAW)
+		return -EINVAL;
+
+	new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
+
+	write_lock_bh(&ip_ra_lock);
+	for (rap = &ip_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
+		if (ra->sk == sk) {
+			if (on) {
+				write_unlock_bh(&ip_ra_lock);
+				if (new_ra)
+					kfree(new_ra);
+				return -EADDRINUSE;
+			}
+			*rap = ra->next;
+			write_unlock_bh(&ip_ra_lock);
+
+			if (ra->destructor)
+				ra->destructor(sk);
+			sock_put(sk);
+			kfree(ra);
+			return 0;
+		}
+	}
+	if (new_ra == NULL) {
+		write_unlock_bh(&ip_ra_lock);
+		return -ENOBUFS;
+	}
+	new_ra->sk = sk;
+	new_ra->destructor = destructor;
+
+	new_ra->next = ra;
+	*rap = new_ra;
+	sock_hold(sk);
+	write_unlock_bh(&ip_ra_lock);
+
+	return 0;
+}
+
+void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 
+		   u16 port, u32 info, u8 *payload)
+{
+	struct inet_sock *inet = inet_sk(sk);
+	struct sock_exterr_skb *serr;
+
+	if (!inet->recverr)
+		return;
+
+	skb = skb_clone(skb, GFP_ATOMIC);
+	if (!skb)
+		return;
+
+	serr = SKB_EXT_ERR(skb);  
+	serr->ee.ee_errno = err;
+	serr->ee.ee_origin = SO_EE_ORIGIN_ICMP;
+	serr->ee.ee_type = skb->h.icmph->type; 
+	serr->ee.ee_code = skb->h.icmph->code;
+	serr->ee.ee_pad = 0;
+	serr->ee.ee_info = info;
+	serr->ee.ee_data = 0;
+	serr->addr_offset = (u8*)&(((struct iphdr*)(skb->h.icmph+1))->daddr) - skb->nh.raw;
+	serr->port = port;
+
+	skb->h.raw = payload;
+	if (!skb_pull(skb, payload - skb->data) ||
+	    sock_queue_err_skb(sk, skb))
+		kfree_skb(skb);
+}
+
+void ip_local_error(struct sock *sk, int err, u32 daddr, u16 port, u32 info)
+{
+	struct inet_sock *inet = inet_sk(sk);
+	struct sock_exterr_skb *serr;
+	struct iphdr *iph;
+	struct sk_buff *skb;
+
+	if (!inet->recverr)
+		return;
+
+	skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC);
+	if (!skb)
+		return;
+
+	iph = (struct iphdr*)skb_put(skb, sizeof(struct iphdr));
+	skb->nh.iph = iph;
+	iph->daddr = daddr;
+
+	serr = SKB_EXT_ERR(skb);  
+	serr->ee.ee_errno = err;
+	serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
+	serr->ee.ee_type = 0; 
+	serr->ee.ee_code = 0;
+	serr->ee.ee_pad = 0;
+	serr->ee.ee_info = info;
+	serr->ee.ee_data = 0;
+	serr->addr_offset = (u8*)&iph->daddr - skb->nh.raw;
+	serr->port = port;
+
+	skb->h.raw = skb->tail;
+	__skb_pull(skb, skb->tail - skb->data);
+
+	if (sock_queue_err_skb(sk, skb))
+		kfree_skb(skb);
+}
+
+/* 
+ *	Handle MSG_ERRQUEUE
+ */
+int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
+{
+	struct sock_exterr_skb *serr;
+	struct sk_buff *skb, *skb2;
+	struct sockaddr_in *sin;
+	struct {
+		struct sock_extended_err ee;
+		struct sockaddr_in	 offender;
+	} errhdr;
+	int err;
+	int copied;
+
+	err = -EAGAIN;
+	skb = skb_dequeue(&sk->sk_error_queue);
+	if (skb == NULL)
+		goto out;
+
+	copied = skb->len;
+	if (copied > len) {
+		msg->msg_flags |= MSG_TRUNC;
+		copied = len;
+	}
+	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+	if (err)
+		goto out_free_skb;
+
+	sock_recv_timestamp(msg, sk, skb);
+
+	serr = SKB_EXT_ERR(skb);
+
+	sin = (struct sockaddr_in *)msg->msg_name;
+	if (sin) {
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = *(u32*)(skb->nh.raw + serr->addr_offset);
+		sin->sin_port = serr->port;
+		memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+
+	memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
+	sin = &errhdr.offender;
+	sin->sin_family = AF_UNSPEC;
+	if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) {
+		struct inet_sock *inet = inet_sk(sk);
+
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = skb->nh.iph->saddr;
+		sin->sin_port = 0;
+		memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
+		if (inet->cmsg_flags)
+			ip_cmsg_recv(msg, skb);
+	}
+
+	put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr);
+
+	/* Now we could try to dump offended packet options */
+
+	msg->msg_flags |= MSG_ERRQUEUE;
+	err = copied;
+
+	/* Reset and regenerate socket error */
+	spin_lock_irq(&sk->sk_error_queue.lock);
+	sk->sk_err = 0;
+	if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) {
+		sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
+		spin_unlock_irq(&sk->sk_error_queue.lock);
+		sk->sk_error_report(sk);
+	} else
+		spin_unlock_irq(&sk->sk_error_queue.lock);
+
+out_free_skb:	
+	kfree_skb(skb);
+out:
+	return err;
+}
+
+
+/*
+ *	Socket option code for IP. This is the end of the line after any TCP,UDP etc options on
+ *	an IP socket.
+ */
+
+int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen)
+{
+	struct inet_sock *inet = inet_sk(sk);
+	int val=0,err;
+
+	if (level != SOL_IP)
+		return -ENOPROTOOPT;
+
+	if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) | 
+			    (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) | 
+			    (1<<IP_RETOPTS) | (1<<IP_TOS) | 
+			    (1<<IP_TTL) | (1<<IP_HDRINCL) | 
+			    (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) | 
+			    (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND))) || 
+				optname == IP_MULTICAST_TTL || 
+				optname == IP_MULTICAST_LOOP) { 
+		if (optlen >= sizeof(int)) {
+			if (get_user(val, (int __user *) optval))
+				return -EFAULT;
+		} else if (optlen >= sizeof(char)) {
+			unsigned char ucval;
+
+			if (get_user(ucval, (unsigned char __user *) optval))
+				return -EFAULT;
+			val = (int) ucval;
+		}
+	}
+
+	/* If optlen==0, it is equivalent to val == 0 */
+
+#ifdef CONFIG_IP_MROUTE
+	if (optname >= MRT_BASE && optname <= (MRT_BASE + 10))
+		return ip_mroute_setsockopt(sk,optname,optval,optlen);
+#endif
+
+	err = 0;
+	lock_sock(sk);
+
+	switch (optname) {
+		case IP_OPTIONS:
+		{
+			struct ip_options * opt = NULL;
+			if (optlen > 40 || optlen < 0)
+				goto e_inval;
+			err = ip_options_get(&opt, optval, optlen, 1);
+			if (err)
+				break;
+			if (sk->sk_type == SOCK_STREAM) {
+				struct tcp_sock *tp = tcp_sk(sk);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+				if (sk->sk_family == PF_INET ||
+				    (!((1 << sk->sk_state) &
+				       (TCPF_LISTEN | TCPF_CLOSE)) &&
+				     inet->daddr != LOOPBACK4_IPV6)) {
+#endif
+					if (inet->opt)
+						tp->ext_header_len -= inet->opt->optlen;
+					if (opt)
+						tp->ext_header_len += opt->optlen;
+					tcp_sync_mss(sk, tp->pmtu_cookie);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+				}
+#endif
+			}
+			opt = xchg(&inet->opt, opt);
+			if (opt)
+				kfree(opt);
+			break;
+		}
+		case IP_PKTINFO:
+			if (val)
+				inet->cmsg_flags |= IP_CMSG_PKTINFO;
+			else
+				inet->cmsg_flags &= ~IP_CMSG_PKTINFO;
+			break;
+		case IP_RECVTTL:
+			if (val)
+				inet->cmsg_flags |=  IP_CMSG_TTL;
+			else
+				inet->cmsg_flags &= ~IP_CMSG_TTL;
+			break;
+		case IP_RECVTOS:
+			if (val)
+				inet->cmsg_flags |=  IP_CMSG_TOS;
+			else
+				inet->cmsg_flags &= ~IP_CMSG_TOS;
+			break;
+		case IP_RECVOPTS:
+			if (val)
+				inet->cmsg_flags |=  IP_CMSG_RECVOPTS;
+			else
+				inet->cmsg_flags &= ~IP_CMSG_RECVOPTS;
+			break;
+		case IP_RETOPTS:
+			if (val)
+				inet->cmsg_flags |= IP_CMSG_RETOPTS;
+			else
+				inet->cmsg_flags &= ~IP_CMSG_RETOPTS;
+			break;
+		case IP_TOS:	/* This sets both TOS and Precedence */
+			if (sk->sk_type == SOCK_STREAM) {
+				val &= ~3;
+				val |= inet->tos & 3;
+			}
+			if (IPTOS_PREC(val) >= IPTOS_PREC_CRITIC_ECP && 
+			    !capable(CAP_NET_ADMIN)) {
+				err = -EPERM;
+				break;
+			}
+			if (inet->tos != val) {
+				inet->tos = val;
+				sk->sk_priority = rt_tos2priority(val);
+				sk_dst_reset(sk); 
+			}
+			break;
+		case IP_TTL:
+			if (optlen<1)
+				goto e_inval;
+			if (val != -1 && (val < 1 || val>255))
+				goto e_inval;
+			inet->uc_ttl = val;
+			break;
+		case IP_HDRINCL:
+			if (sk->sk_type != SOCK_RAW) {
+				err = -ENOPROTOOPT;
+				break;
+			}
+			inet->hdrincl = val ? 1 : 0;
+			break;
+		case IP_MTU_DISCOVER:
+			if (val<0 || val>2)
+				goto e_inval;
+			inet->pmtudisc = val;
+			break;
+		case IP_RECVERR:
+			inet->recverr = !!val;
+			if (!val)
+				skb_queue_purge(&sk->sk_error_queue);
+			break;
+		case IP_MULTICAST_TTL:
+			if (sk->sk_type == SOCK_STREAM)
+				goto e_inval;
+			if (optlen<1)
+				goto e_inval;
+			if (val==-1)
+				val = 1;
+			if (val < 0 || val > 255)
+				goto e_inval;
+			inet->mc_ttl = val;
+	                break;
+		case IP_MULTICAST_LOOP: 
+			if (optlen<1)
+				goto e_inval;
+			inet->mc_loop = !!val;
+	                break;
+		case IP_MULTICAST_IF: 
+		{
+			struct ip_mreqn mreq;
+			struct net_device *dev = NULL;
+
+			if (sk->sk_type == SOCK_STREAM)
+				goto e_inval;
+			/*
+			 *	Check the arguments are allowable
+			 */
+
+			err = -EFAULT;
+			if (optlen >= sizeof(struct ip_mreqn)) {
+				if (copy_from_user(&mreq,optval,sizeof(mreq)))
+					break;
+			} else {
+				memset(&mreq, 0, sizeof(mreq));
+				if (optlen >= sizeof(struct in_addr) &&
+				    copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr)))
+					break;
+			}
+
+			if (!mreq.imr_ifindex) {
+				if (mreq.imr_address.s_addr == INADDR_ANY) {
+					inet->mc_index = 0;
+					inet->mc_addr  = 0;
+					err = 0;
+					break;
+				}
+				dev = ip_dev_find(mreq.imr_address.s_addr);
+				if (dev) {
+					mreq.imr_ifindex = dev->ifindex;
+					dev_put(dev);
+				}
+			} else
+				dev = __dev_get_by_index(mreq.imr_ifindex);
+
+
+			err = -EADDRNOTAVAIL;
+			if (!dev)
+				break;
+
+			err = -EINVAL;
+			if (sk->sk_bound_dev_if &&
+			    mreq.imr_ifindex != sk->sk_bound_dev_if)
+				break;
+
+			inet->mc_index = mreq.imr_ifindex;
+			inet->mc_addr  = mreq.imr_address.s_addr;
+			err = 0;
+			break;
+		}
+
+		case IP_ADD_MEMBERSHIP:
+		case IP_DROP_MEMBERSHIP: 
+		{
+			struct ip_mreqn mreq;
+
+			if (optlen < sizeof(struct ip_mreq))
+				goto e_inval;
+			err = -EFAULT;
+			if (optlen >= sizeof(struct ip_mreqn)) {
+				if(copy_from_user(&mreq,optval,sizeof(mreq)))
+					break;
+			} else {
+				memset(&mreq, 0, sizeof(mreq));
+				if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq)))
+					break; 
+			}
+
+			if (optname == IP_ADD_MEMBERSHIP)
+				err = ip_mc_join_group(sk, &mreq);
+			else
+				err = ip_mc_leave_group(sk, &mreq);
+			break;
+		}
+		case IP_MSFILTER:
+		{
+			extern int sysctl_optmem_max;
+			extern int sysctl_igmp_max_msf;
+			struct ip_msfilter *msf;
+
+			if (optlen < IP_MSFILTER_SIZE(0))
+				goto e_inval;
+			if (optlen > sysctl_optmem_max) {
+				err = -ENOBUFS;
+				break;
+			}
+			msf = (struct ip_msfilter *)kmalloc(optlen, GFP_KERNEL);
+			if (msf == 0) {
+				err = -ENOBUFS;
+				break;
+			}
+			err = -EFAULT;
+			if (copy_from_user(msf, optval, optlen)) {
+				kfree(msf);
+				break;
+			}
+			/* numsrc >= (1G-4) overflow in 32 bits */
+			if (msf->imsf_numsrc >= 0x3ffffffcU ||
+			    msf->imsf_numsrc > sysctl_igmp_max_msf) {
+				kfree(msf);
+				err = -ENOBUFS;
+				break;
+			}
+			if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) {
+				kfree(msf);
+				err = -EINVAL;
+				break;
+			}
+			err = ip_mc_msfilter(sk, msf, 0);
+			kfree(msf);
+			break;
+		}
+		case IP_BLOCK_SOURCE:
+		case IP_UNBLOCK_SOURCE:
+		case IP_ADD_SOURCE_MEMBERSHIP:
+		case IP_DROP_SOURCE_MEMBERSHIP:
+		{
+			struct ip_mreq_source mreqs;
+			int omode, add;
+
+			if (optlen != sizeof(struct ip_mreq_source))
+				goto e_inval;
+			if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
+				err = -EFAULT;
+				break;
+			}
+			if (optname == IP_BLOCK_SOURCE) {
+				omode = MCAST_EXCLUDE;
+				add = 1;
+			} else if (optname == IP_UNBLOCK_SOURCE) {
+				omode = MCAST_EXCLUDE;
+				add = 0;
+			} else if (optname == IP_ADD_SOURCE_MEMBERSHIP) {
+				struct ip_mreqn mreq;
+
+				mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
+				mreq.imr_address.s_addr = mreqs.imr_interface;
+				mreq.imr_ifindex = 0;
+				err = ip_mc_join_group(sk, &mreq);
+				if (err)
+					break;
+				omode = MCAST_INCLUDE;
+				add = 1;
+			} else /*IP_DROP_SOURCE_MEMBERSHIP */ {
+				omode = MCAST_INCLUDE;
+				add = 0;
+			}
+			err = ip_mc_source(add, omode, sk, &mreqs, 0);
+			break;
+		}
+		case MCAST_JOIN_GROUP:
+		case MCAST_LEAVE_GROUP: 
+		{
+			struct group_req greq;
+			struct sockaddr_in *psin;
+			struct ip_mreqn mreq;
+
+			if (optlen < sizeof(struct group_req))
+				goto e_inval;
+			err = -EFAULT;
+			if(copy_from_user(&greq, optval, sizeof(greq)))
+				break;
+			psin = (struct sockaddr_in *)&greq.gr_group;
+			if (psin->sin_family != AF_INET)
+				goto e_inval;
+			memset(&mreq, 0, sizeof(mreq));
+			mreq.imr_multiaddr = psin->sin_addr;
+			mreq.imr_ifindex = greq.gr_interface;
+
+			if (optname == MCAST_JOIN_GROUP)
+				err = ip_mc_join_group(sk, &mreq);
+			else
+				err = ip_mc_leave_group(sk, &mreq);
+			break;
+		}
+		case MCAST_JOIN_SOURCE_GROUP:
+		case MCAST_LEAVE_SOURCE_GROUP:
+		case MCAST_BLOCK_SOURCE:
+		case MCAST_UNBLOCK_SOURCE:
+		{
+			struct group_source_req greqs;
+			struct ip_mreq_source mreqs;
+			struct sockaddr_in *psin;
+			int omode, add;
+
+			if (optlen != sizeof(struct group_source_req))
+				goto e_inval;
+			if (copy_from_user(&greqs, optval, sizeof(greqs))) {
+				err = -EFAULT;
+				break;
+			}
+			if (greqs.gsr_group.ss_family != AF_INET ||
+			    greqs.gsr_source.ss_family != AF_INET) {
+				err = -EADDRNOTAVAIL;
+				break;
+			}
+			psin = (struct sockaddr_in *)&greqs.gsr_group;
+			mreqs.imr_multiaddr = psin->sin_addr.s_addr;
+			psin = (struct sockaddr_in *)&greqs.gsr_source;
+			mreqs.imr_sourceaddr = psin->sin_addr.s_addr;
+			mreqs.imr_interface = 0; /* use index for mc_source */
+
+			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 ip_mreqn mreq;
+
+				psin = (struct sockaddr_in *)&greqs.gsr_group;
+				mreq.imr_multiaddr = psin->sin_addr;
+				mreq.imr_address.s_addr = 0;
+				mreq.imr_ifindex = greqs.gsr_interface;
+				err = ip_mc_join_group(sk, &mreq);
+				if (err)
+					break;
+				greqs.gsr_interface = mreq.imr_ifindex;
+				omode = MCAST_INCLUDE;
+				add = 1;
+			} else /* MCAST_LEAVE_SOURCE_GROUP */ {
+				omode = MCAST_INCLUDE;
+				add = 0;
+			}
+			err = ip_mc_source(add, omode, sk, &mreqs,
+				greqs.gsr_interface);
+			break;
+		}
+		case MCAST_MSFILTER:
+		{
+			extern int sysctl_optmem_max;
+			extern int sysctl_igmp_max_msf;
+			struct sockaddr_in *psin;
+			struct ip_msfilter *msf = NULL;
+			struct group_filter *gsf = NULL;
+			int msize, i, ifindex;
+
+			if (optlen < GROUP_FILTER_SIZE(0))
+				goto e_inval;
+			if (optlen > sysctl_optmem_max) {
+				err = -ENOBUFS;
+				break;
+			}
+			gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
+			if (gsf == 0) {
+				err = -ENOBUFS;
+				break;
+			}
+			err = -EFAULT;
+			if (copy_from_user(gsf, optval, optlen)) {
+				goto mc_msf_out;
+			}
+			/* numsrc >= (4G-140)/128 overflow in 32 bits */
+			if (gsf->gf_numsrc >= 0x1ffffff ||
+			    gsf->gf_numsrc > sysctl_igmp_max_msf) {
+				err = -ENOBUFS;
+				goto mc_msf_out;
+			}
+			if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
+				err = -EINVAL;
+				goto mc_msf_out;
+			}
+			msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
+			msf = (struct ip_msfilter *)kmalloc(msize,GFP_KERNEL);
+			if (msf == 0) {
+				err = -ENOBUFS;
+				goto mc_msf_out;
+			}
+			ifindex = gsf->gf_interface;
+			psin = (struct sockaddr_in *)&gsf->gf_group;
+			if (psin->sin_family != AF_INET) {
+				err = -EADDRNOTAVAIL;
+				goto mc_msf_out;
+			}
+			msf->imsf_multiaddr = psin->sin_addr.s_addr;
+			msf->imsf_interface = 0;
+			msf->imsf_fmode = gsf->gf_fmode;
+			msf->imsf_numsrc = gsf->gf_numsrc;
+			err = -EADDRNOTAVAIL;
+			for (i=0; i<gsf->gf_numsrc; ++i) {
+				psin = (struct sockaddr_in *)&gsf->gf_slist[i];
+
+				if (psin->sin_family != AF_INET)
+					goto mc_msf_out;
+				msf->imsf_slist[i] = psin->sin_addr.s_addr;
+			}
+			kfree(gsf);
+			gsf = NULL;
+
+			err = ip_mc_msfilter(sk, msf, ifindex);
+mc_msf_out:
+			if (msf)
+				kfree(msf);
+			if (gsf)
+				kfree(gsf);
+			break;
+		}
+		case IP_ROUTER_ALERT:	
+			err = ip_ra_control(sk, val ? 1 : 0, NULL);
+			break;
+
+		case IP_FREEBIND:
+			if (optlen<1)
+				goto e_inval;
+			inet->freebind = !!val; 
+	                break;			
+ 
+		case IP_IPSEC_POLICY:
+		case IP_XFRM_POLICY:
+			err = xfrm_user_policy(sk, optname, optval, optlen);
+			break;
+
+		default:
+#ifdef CONFIG_NETFILTER
+			err = nf_setsockopt(sk, PF_INET, optname, optval, 
+					    optlen);
+#else
+			err = -ENOPROTOOPT;
+#endif
+			break;
+	}
+	release_sock(sk);
+	return err;
+
+e_inval:
+	release_sock(sk);
+	return -EINVAL;
+}
+
+/*
+ *	Get the options. Note for future reference. The GET of IP options gets the
+ *	_received_ ones. The set sets the _sent_ ones.
+ */
+
+int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen)
+{
+	struct inet_sock *inet = inet_sk(sk);
+	int val;
+	int len;
+	
+	if(level!=SOL_IP)
+		return -EOPNOTSUPP;
+
+#ifdef CONFIG_IP_MROUTE
+	if(optname>=MRT_BASE && optname <=MRT_BASE+10)
+	{
+		return ip_mroute_getsockopt(sk,optname,optval,optlen);
+	}
+#endif
+
+	if(get_user(len,optlen))
+		return -EFAULT;
+	if(len < 0)
+		return -EINVAL;
+		
+	lock_sock(sk);
+
+	switch(optname)	{
+		case IP_OPTIONS:
+			{
+				unsigned char optbuf[sizeof(struct ip_options)+40];
+				struct ip_options * opt = (struct ip_options*)optbuf;
+				opt->optlen = 0;
+				if (inet->opt)
+					memcpy(optbuf, inet->opt,
+					       sizeof(struct ip_options)+
+					       inet->opt->optlen);
+				release_sock(sk);
+
+				if (opt->optlen == 0) 
+					return put_user(0, optlen);
+
+				ip_options_undo(opt);
+
+				len = min_t(unsigned int, len, opt->optlen);
+				if(put_user(len, optlen))
+					return -EFAULT;
+				if(copy_to_user(optval, opt->__data, len))
+					return -EFAULT;
+				return 0;
+			}
+		case IP_PKTINFO:
+			val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0;
+			break;
+		case IP_RECVTTL:
+			val = (inet->cmsg_flags & IP_CMSG_TTL) != 0;
+			break;
+		case IP_RECVTOS:
+			val = (inet->cmsg_flags & IP_CMSG_TOS) != 0;
+			break;
+		case IP_RECVOPTS:
+			val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0;
+			break;
+		case IP_RETOPTS:
+			val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0;
+			break;
+		case IP_TOS:
+			val = inet->tos;
+			break;
+		case IP_TTL:
+			val = (inet->uc_ttl == -1 ?
+			       sysctl_ip_default_ttl :
+			       inet->uc_ttl);
+			break;
+		case IP_HDRINCL:
+			val = inet->hdrincl;
+			break;
+		case IP_MTU_DISCOVER:
+			val = inet->pmtudisc;
+			break;
+		case IP_MTU:
+		{
+			struct dst_entry *dst;
+			val = 0;
+			dst = sk_dst_get(sk);
+			if (dst) {
+				val = dst_mtu(dst);
+				dst_release(dst);
+			}
+			if (!val) {
+				release_sock(sk);
+				return -ENOTCONN;
+			}
+			break;
+		}
+		case IP_RECVERR:
+			val = inet->recverr;
+			break;
+		case IP_MULTICAST_TTL:
+			val = inet->mc_ttl;
+			break;
+		case IP_MULTICAST_LOOP:
+			val = inet->mc_loop;
+			break;
+		case IP_MULTICAST_IF:
+		{
+			struct in_addr addr;
+			len = min_t(unsigned int, len, sizeof(struct in_addr));
+			addr.s_addr = inet->mc_addr;
+			release_sock(sk);
+
+  			if(put_user(len, optlen))
+  				return -EFAULT;
+			if(copy_to_user(optval, &addr, len))
+				return -EFAULT;
+			return 0;
+		}
+		case IP_MSFILTER:
+		{
+			struct ip_msfilter msf;
+			int err;
+
+			if (len < IP_MSFILTER_SIZE(0)) {
+				release_sock(sk);
+				return -EINVAL;
+			}
+			if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) {
+				release_sock(sk);
+				return -EFAULT;
+			}
+			err = ip_mc_msfget(sk, &msf,
+				(struct ip_msfilter __user *)optval, optlen);
+			release_sock(sk);
+			return err;
+		}
+		case MCAST_MSFILTER:
+		{
+			struct group_filter gsf;
+			int err;
+
+			if (len < GROUP_FILTER_SIZE(0)) {
+				release_sock(sk);
+				return -EINVAL;
+			}
+			if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) {
+				release_sock(sk);
+				return -EFAULT;
+			}
+			err = ip_mc_gsfget(sk, &gsf,
+				(struct group_filter __user *)optval, optlen);
+			release_sock(sk);
+			return err;
+		}
+		case IP_PKTOPTIONS:		
+		{
+			struct msghdr msg;
+
+			release_sock(sk);
+
+			if (sk->sk_type != SOCK_STREAM)
+				return -ENOPROTOOPT;
+
+			msg.msg_control = optval;
+			msg.msg_controllen = len;
+			msg.msg_flags = 0;
+
+			if (inet->cmsg_flags & IP_CMSG_PKTINFO) {
+				struct in_pktinfo info;
+
+				info.ipi_addr.s_addr = inet->rcv_saddr;
+				info.ipi_spec_dst.s_addr = inet->rcv_saddr;
+				info.ipi_ifindex = inet->mc_index;
+				put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
+			}
+			if (inet->cmsg_flags & IP_CMSG_TTL) {
+				int hlim = inet->mc_ttl;
+				put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
+			}
+			len -= msg.msg_controllen;
+			return put_user(len, optlen);
+		}
+		case IP_FREEBIND: 
+			val = inet->freebind; 
+			break; 
+		default:
+#ifdef CONFIG_NETFILTER
+			val = nf_getsockopt(sk, PF_INET, optname, optval, 
+					    &len);
+			release_sock(sk);
+			if (val >= 0)
+				val = put_user(len, optlen);
+			return val;
+#else
+			release_sock(sk);
+			return -ENOPROTOOPT;
+#endif
+	}
+	release_sock(sk);
+	
+	if (len < sizeof(int) && len > 0 && val>=0 && val<255) {
+		unsigned char ucval = (unsigned char)val;
+		len = 1;
+		if(put_user(len, optlen))
+			return -EFAULT;
+		if(copy_to_user(optval,&ucval,1))
+			return -EFAULT;
+	} else {
+		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;
+}
+
+EXPORT_SYMBOL(ip_cmsg_recv);
+
+#ifdef CONFIG_IP_SCTP_MODULE
+EXPORT_SYMBOL(ip_getsockopt);
+EXPORT_SYMBOL(ip_setsockopt);
+#endif