Linux-2.6.12-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!

net/ipx/ChangeLog

@@ -0,0 +1,101 @@
+ Revision 0.21:	Uses the new generic socket option code.
+
+ Revision 0.22:	Gcc clean ups and drop out device registration. Use the
+ 		new multi-protocol edition of hard_header
+
+ Revision 0.23: IPX /proc by Mark Evans. Adding a route will
+ 		will overwrite any existing route to the same network.
+
+ Revision 0.24:	Supports new /proc with no 4K limit
+
+ Revision 0.25:	Add ephemeral sockets, passive local network
+ 		identification, support for local net 0 and
+ 		multiple datalinks <Greg Page>
+
+ Revision 0.26: Device drop kills IPX routes via it. (needed for module)
+
+ Revision 0.27: Autobind <Mark Evans>
+
+ Revision 0.28: Small fix for multiple local networks <Thomas Winder>
+
+ Revision 0.29: Assorted major errors removed <Mark Evans>
+ 		Small correction to promisc mode error fix <Alan Cox>
+ 		Asynchronous I/O support. Changed to use notifiers
+ 		and the newer packet_type stuff. Assorted major
+ 		fixes <Alejandro Liu>
+
+ Revision 0.30:	Moved to net/ipx/...	<Alan Cox>
+ 		Don't set address length on recvfrom that errors.
+ 		Incorrect verify_area.
+
+ Revision 0.31:	New sk_buffs. This still needs a lot of 
+ 		testing. <Alan Cox>
+
+ Revision 0.32: Using sock_alloc_send_skb, firewall hooks. <Alan Cox>
+ 		Supports sendmsg/recvmsg
+
+ Revision 0.33:	Internal network support, routing changes, uses a
+ 		protocol private area for ipx data.
+
+ Revision 0.34:	Module support. <Jim Freeman>
+
+ Revision 0.35: Checksum support. <Neil Turton>, hooked in by <Alan Cox>
+ 		Handles WIN95 discovery packets <Volker Lendecke>
+
+ Revision 0.36:	Internal bump up for 2.1
+
+ Revision 0.37:	Began adding POSIXisms.
+
+ Revision 0.38: Asynchronous socket stuff made current.
+
+ Revision 0.39: SPX interfaces
+
+ Revision 0.40: Tiny SIOCGSTAMP fix ([email protected])
+
+ Revision 0.41: 802.2TR removed ([email protected])
+ 		Fixed connecting to primary net,
+ 		Automatic binding on send & receive,
+ 		Martijn van Oosterhout <[email protected]>
+
+ Revision 042:  Multithreading - use spinlocks and refcounting to
+ 		protect some structures: ipx_interface sock list, list
+ 		of ipx interfaces, etc. 
+ 		Bugfixes - do refcounting on net_devices, check function
+ 		results, etc. Thanks to davem and freitag for
+ 		suggestions and guidance.
+ 		Arnaldo Carvalho de Melo <[email protected]>,
+ 		November, 2000
+
+ Revision 043:	Shared SKBs, don't mangle packets, some cleanups
+ 		Arnaldo Carvalho de Melo <[email protected]>,
+ 		December, 2000
+
+ Revision 044:	Call ipxitf_hold on NETDEV_UP - acme
+
+ Revision 045:	fix PPROP routing bug - acme
+
+ Revision 046:	Further fixes to PPROP, ipxitf_create_internal was
+ 		doing an unneeded MOD_INC_USE_COUNT, implement
+ 		sysctl for ipx_pprop_broacasting, fix the ipx sysctl
+ 		handling, making it dynamic, some cleanups, thanks to
+ 		Petr Vandrovec for review and good suggestions. (acme)
+
+ Revision 047:	Cleanups, CodingStyle changes, move the ncp connection
+ 		hack out of line - acme
+
+ Revision 048:	Use sk->protinfo to store the pointer to IPX private
+ 		area, remove af_ipx from sk->protinfo and move ipx_opt
+ 		to include/net/ipx.h, use IPX_SK like DecNET, etc - acme
+
+ Revision 049:	SPX support dropped, see comment in ipx_create - acme
+
+ Revision 050:	Use seq_file for proc stuff, moving it to ipx_proc.c - acme
+
+Other fixes:
+ 
+ Protect the module by a MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT pair. Also, now
+ usage count is managed this way:
+ -Count one if the auto_interface mode is on
+ -Count one per configured interface
+ 
+ Jacques Gelinas ([email protected])

net/ipx/Kconfig

@@ -0,0 +1,31 @@
+#
+# IPX configuration
+#
+config IPX_INTERN
+	bool "IPX: Full internal IPX network"
+	depends on IPX
+	---help---
+	  Every IPX network has an address that identifies it. Sometimes it is
+	  useful to give an IPX "network" address to your Linux box as well
+	  (for example if your box is acting as a file server for different
+	  IPX networks: it will then be accessible from everywhere using the
+	  same address). The way this is done is to create a virtual internal
+	  "network" inside your box and to assign an IPX address to this
+	  network. Say Y here if you want to do this; read the IPX-HOWTO at
+	  <http://www.tldp.org/docs.html#howto> for details.
+
+	  The full internal IPX network enables you to allocate sockets on
+	  different virtual nodes of the internal network. This is done by
+	  evaluating the field sipx_node of the socket address given to the
+	  bind call. So applications should always initialize the node field
+	  to 0 when binding a socket on the primary network. In this case the
+	  socket is assigned the default node that has been given to the
+	  kernel when the internal network was created. By enabling the full
+	  internal IPX network the cross-forwarding of packets targeted at
+	  'special' sockets to sockets listening on the primary network is
+	  disabled. This might break existing applications, especially RIP/SAP
+	  daemons. A RIP/SAP daemon that works well with the full internal net
+	  can be found on <ftp://ftp.gwdg.de/pub/linux/misc/ncpfs/>.
+
+	  If you don't know what you are doing, say N.
+

net/ipx/Makefile

@@ -0,0 +1,8 @@
+#
+# Makefile for the Linux IPX layer.
+#
+
+obj-$(CONFIG_IPX) += ipx.o
+
+ipx-y			:= af_ipx.o ipx_route.o ipx_proc.o
+ipx-$(CONFIG_SYSCTL)	+= sysctl_net_ipx.o

net/ipx/ipx_proc.c

@@ -0,0 +1,408 @@
+/*
+ *	IPX proc routines
+ *
+ * 	Copyright(C) Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 2002
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#ifdef CONFIG_PROC_FS
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/seq_file.h>
+#include <linux/tcp.h>
+#include <net/ipx.h>
+
+static __inline__ struct ipx_interface *ipx_get_interface_idx(loff_t pos)
+{
+	struct ipx_interface *i;
+
+	list_for_each_entry(i, &ipx_interfaces, node)
+		if (!pos--)
+			goto out;
+	i = NULL;
+out:
+	return i;
+}
+
+static struct ipx_interface *ipx_interfaces_next(struct ipx_interface *i)
+{
+	struct ipx_interface *rc = NULL;
+
+	if (i->node.next != &ipx_interfaces)
+		rc = list_entry(i->node.next, struct ipx_interface, node);
+	return rc;
+}
+
+static void *ipx_seq_interface_start(struct seq_file *seq, loff_t *pos)
+{
+	loff_t l = *pos;
+
+	spin_lock_bh(&ipx_interfaces_lock);
+	return l ? ipx_get_interface_idx(--l) : SEQ_START_TOKEN;
+}
+
+static void *ipx_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct ipx_interface *i;
+
+	++*pos;
+	if (v == SEQ_START_TOKEN)
+		i = ipx_interfaces_head();
+	else
+		i = ipx_interfaces_next(v);
+	return i;
+}
+
+static void ipx_seq_interface_stop(struct seq_file *seq, void *v)
+{
+	spin_unlock_bh(&ipx_interfaces_lock);
+}
+
+static int ipx_seq_interface_show(struct seq_file *seq, void *v)
+{
+	struct ipx_interface *i;
+
+	if (v == SEQ_START_TOKEN) {
+		seq_puts(seq, "Network    Node_Address   Primary  Device     "
+			      "Frame_Type");
+#ifdef IPX_REFCNT_DEBUG
+		seq_puts(seq, "  refcnt");
+#endif
+		seq_puts(seq, "\n");
+		goto out;
+	}
+
+	i = v;
+	seq_printf(seq, "%08lX   ", (unsigned long int)ntohl(i->if_netnum));
+	seq_printf(seq, "%02X%02X%02X%02X%02X%02X   ",
+			i->if_node[0], i->if_node[1], i->if_node[2],
+			i->if_node[3], i->if_node[4], i->if_node[5]);
+	seq_printf(seq, "%-9s", i == ipx_primary_net ? "Yes" : "No");
+	seq_printf(seq, "%-11s", ipx_device_name(i));
+	seq_printf(seq, "%-9s", ipx_frame_name(i->if_dlink_type));
+#ifdef IPX_REFCNT_DEBUG
+	seq_printf(seq, "%6d", atomic_read(&i->refcnt));
+#endif
+	seq_puts(seq, "\n");
+out:
+	return 0;
+}
+
+static struct ipx_route *ipx_routes_head(void)
+{
+	struct ipx_route *rc = NULL;
+
+	if (!list_empty(&ipx_routes))
+		rc = list_entry(ipx_routes.next, struct ipx_route, node);
+	return rc;
+}
+
+static struct ipx_route *ipx_routes_next(struct ipx_route *r)
+{
+	struct ipx_route *rc = NULL;
+
+	if (r->node.next != &ipx_routes)
+		rc = list_entry(r->node.next, struct ipx_route, node);
+	return rc;
+}
+
+static __inline__ struct ipx_route *ipx_get_route_idx(loff_t pos)
+{
+	struct ipx_route *r;
+
+	list_for_each_entry(r, &ipx_routes, node)
+		if (!pos--)
+			goto out;
+	r = NULL;
+out:
+	return r;
+}
+
+static void *ipx_seq_route_start(struct seq_file *seq, loff_t *pos)
+{
+	loff_t l = *pos;
+	read_lock_bh(&ipx_routes_lock);
+	return l ? ipx_get_route_idx(--l) : SEQ_START_TOKEN;
+}
+
+static void *ipx_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct ipx_route *r;
+
+	++*pos;
+	if (v == SEQ_START_TOKEN)
+		r = ipx_routes_head();
+	else
+		r = ipx_routes_next(v);
+	return r;
+}
+
+static void ipx_seq_route_stop(struct seq_file *seq, void *v)
+{
+	read_unlock_bh(&ipx_routes_lock);
+}
+
+static int ipx_seq_route_show(struct seq_file *seq, void *v)
+{
+	struct ipx_route *rt;
+
+	if (v == SEQ_START_TOKEN) {
+		seq_puts(seq, "Network    Router_Net   Router_Node\n");
+		goto out;
+	}
+	rt = v;
+	seq_printf(seq, "%08lX   ", (unsigned long int)ntohl(rt->ir_net));
+	if (rt->ir_routed)
+		seq_printf(seq, "%08lX     %02X%02X%02X%02X%02X%02X\n",
+			   (long unsigned int)ntohl(rt->ir_intrfc->if_netnum),
+			   rt->ir_router_node[0], rt->ir_router_node[1],
+			   rt->ir_router_node[2], rt->ir_router_node[3],
+			   rt->ir_router_node[4], rt->ir_router_node[5]);
+	else
+		seq_puts(seq, "Directly     Connected\n");
+out:
+	return 0;
+}
+
+static __inline__ struct sock *ipx_get_socket_idx(loff_t pos)
+{
+	struct sock *s = NULL;
+	struct hlist_node *node;
+	struct ipx_interface *i;
+
+	list_for_each_entry(i, &ipx_interfaces, node) {
+		spin_lock_bh(&i->if_sklist_lock);
+		sk_for_each(s, node, &i->if_sklist) {
+			if (!pos)
+				break;
+			--pos;
+		}
+		spin_unlock_bh(&i->if_sklist_lock);
+		if (!pos) {
+			if (node)
+				goto found;
+			break;
+		}
+	}
+	s = NULL;
+found:
+	return s;
+}
+
+static void *ipx_seq_socket_start(struct seq_file *seq, loff_t *pos)
+{
+	loff_t l = *pos;
+
+	spin_lock_bh(&ipx_interfaces_lock);
+	return l ? ipx_get_socket_idx(--l) : SEQ_START_TOKEN;
+}
+
+static void *ipx_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct sock* sk, *next;
+	struct ipx_interface *i;
+	struct ipx_sock *ipxs;
+
+	++*pos;
+	if (v == SEQ_START_TOKEN) {
+		sk = NULL;
+		i = ipx_interfaces_head();
+		if (!i)
+			goto out;
+		sk = sk_head(&i->if_sklist);
+		if (sk)
+			spin_lock_bh(&i->if_sklist_lock);
+		goto out;
+	}
+	sk = v;
+	next = sk_next(sk);
+	if (next) {
+		sk = next;
+		goto out;
+	}
+	ipxs = ipx_sk(sk);
+	i = ipxs->intrfc;
+	spin_unlock_bh(&i->if_sklist_lock);
+	sk = NULL;
+	for (;;) {
+		i = ipx_interfaces_next(i);
+		if (!i)
+			break;
+		spin_lock_bh(&i->if_sklist_lock);
+		if (!hlist_empty(&i->if_sklist)) {
+			sk = sk_head(&i->if_sklist);
+			break;
+		}
+		spin_unlock_bh(&i->if_sklist_lock);
+	}
+out:
+	return sk;
+}
+
+static int ipx_seq_socket_show(struct seq_file *seq, void *v)
+{
+	struct sock *s;
+	struct ipx_sock *ipxs;
+
+	if (v == SEQ_START_TOKEN) {
+#ifdef CONFIG_IPX_INTERN
+		seq_puts(seq, "Local_Address               "
+			      "Remote_Address              Tx_Queue  "
+			      "Rx_Queue  State  Uid\n");
+#else
+		seq_puts(seq, "Local_Address  Remote_Address              "
+			      "Tx_Queue  Rx_Queue  State  Uid\n");
+#endif
+		goto out;
+	}
+
+	s = v;
+	ipxs = ipx_sk(s);
+#ifdef CONFIG_IPX_INTERN
+	seq_printf(seq, "%08lX:%02X%02X%02X%02X%02X%02X:%04X  ",
+		   (unsigned long)htonl(ipxs->intrfc->if_netnum),
+		   ipxs->node[0], ipxs->node[1], ipxs->node[2], ipxs->node[3],
+		   ipxs->node[4], ipxs->node[5], htons(ipxs->port));
+#else
+	seq_printf(seq, "%08lX:%04X  ", (unsigned long) htonl(ipxs->intrfc->if_netnum),
+		   htons(ipxs->port));
+#endif	/* CONFIG_IPX_INTERN */
+	if (s->sk_state != TCP_ESTABLISHED)
+		seq_printf(seq, "%-28s", "Not_Connected");
+	else {
+		seq_printf(seq, "%08lX:%02X%02X%02X%02X%02X%02X:%04X  ",
+			   (unsigned long)htonl(ipxs->dest_addr.net),
+			   ipxs->dest_addr.node[0], ipxs->dest_addr.node[1],
+			   ipxs->dest_addr.node[2], ipxs->dest_addr.node[3],
+			   ipxs->dest_addr.node[4], ipxs->dest_addr.node[5],
+			   htons(ipxs->dest_addr.sock));
+	}
+
+	seq_printf(seq, "%08X  %08X  %02X     %03d\n",
+		   atomic_read(&s->sk_wmem_alloc),
+		   atomic_read(&s->sk_rmem_alloc),
+		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
+out:
+	return 0;
+}
+
+static struct seq_operations ipx_seq_interface_ops = {
+	.start  = ipx_seq_interface_start,
+	.next   = ipx_seq_interface_next,
+	.stop   = ipx_seq_interface_stop,
+	.show   = ipx_seq_interface_show,
+};
+
+static struct seq_operations ipx_seq_route_ops = {
+	.start  = ipx_seq_route_start,
+	.next   = ipx_seq_route_next,
+	.stop   = ipx_seq_route_stop,
+	.show   = ipx_seq_route_show,
+};
+
+static struct seq_operations ipx_seq_socket_ops = {
+	.start  = ipx_seq_socket_start,
+	.next   = ipx_seq_socket_next,
+	.stop   = ipx_seq_interface_stop,
+	.show   = ipx_seq_socket_show,
+};
+
+static int ipx_seq_route_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &ipx_seq_route_ops);
+}
+
+static int ipx_seq_interface_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &ipx_seq_interface_ops);
+}
+
+static int ipx_seq_socket_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &ipx_seq_socket_ops);
+}
+
+static struct file_operations ipx_seq_interface_fops = {
+	.owner		= THIS_MODULE,
+	.open           = ipx_seq_interface_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = seq_release,
+};
+
+static struct file_operations ipx_seq_route_fops = {
+	.owner		= THIS_MODULE,
+	.open           = ipx_seq_route_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = seq_release,
+};
+
+static struct file_operations ipx_seq_socket_fops = {
+	.owner		= THIS_MODULE,
+	.open           = ipx_seq_socket_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = seq_release,
+};
+
+static struct proc_dir_entry *ipx_proc_dir;
+
+int __init ipx_proc_init(void)
+{
+	struct proc_dir_entry *p;
+	int rc = -ENOMEM;
+       
+	ipx_proc_dir = proc_mkdir("ipx", proc_net);
+
+	if (!ipx_proc_dir)
+		goto out;
+	p = create_proc_entry("interface", S_IRUGO, ipx_proc_dir);
+	if (!p)
+		goto out_interface;
+
+	p->proc_fops = &ipx_seq_interface_fops;
+	p = create_proc_entry("route", S_IRUGO, ipx_proc_dir);
+	if (!p)
+		goto out_route;
+
+	p->proc_fops = &ipx_seq_route_fops;
+	p = create_proc_entry("socket", S_IRUGO, ipx_proc_dir);
+	if (!p)
+		goto out_socket;
+
+	p->proc_fops = &ipx_seq_socket_fops;
+
+	rc = 0;
+out:
+	return rc;
+out_socket:
+	remove_proc_entry("route", ipx_proc_dir);
+out_route:
+	remove_proc_entry("interface", ipx_proc_dir);
+out_interface:
+	remove_proc_entry("ipx", proc_net);
+	goto out;
+}
+
+void __exit ipx_proc_exit(void)
+{
+	remove_proc_entry("interface", ipx_proc_dir);
+	remove_proc_entry("route", ipx_proc_dir);
+	remove_proc_entry("socket", ipx_proc_dir);
+	remove_proc_entry("ipx", proc_net);
+}
+
+#else /* CONFIG_PROC_FS */
+
+int __init ipx_proc_init(void)
+{
+	return 0;
+}
+
+void __exit ipx_proc_exit(void)
+{
+}
+
+#endif /* CONFIG_PROC_FS */

net/ipx/ipx_route.c

@@ -0,0 +1,293 @@
+/*
+ *	Implements the IPX routing routines.
+ *	Code moved from af_ipx.c.
+ *
+ *	Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 2003
+ *
+ *	See net/ipx/ChangeLog.
+ */
+
+#include <linux/config.h>
+#include <linux/list.h>
+#include <linux/route.h>
+#include <linux/spinlock.h>
+
+#include <net/ipx.h>
+#include <net/sock.h>
+
+LIST_HEAD(ipx_routes);
+DEFINE_RWLOCK(ipx_routes_lock);
+
+extern struct ipx_interface *ipx_internal_net;
+
+extern __u16 ipx_cksum(struct ipxhdr *packet, int length);
+extern struct ipx_interface *ipxitf_find_using_net(__u32 net);
+extern int ipxitf_demux_socket(struct ipx_interface *intrfc,
+			       struct sk_buff *skb, int copy);
+extern int ipxitf_demux_socket(struct ipx_interface *intrfc,
+			       struct sk_buff *skb, int copy);
+extern int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb,
+		       char *node);
+extern struct ipx_interface *ipxitf_find_using_net(__u32 net);
+
+struct ipx_route *ipxrtr_lookup(__u32 net)
+{
+	struct ipx_route *r;
+
+	read_lock_bh(&ipx_routes_lock);
+	list_for_each_entry(r, &ipx_routes, node)
+		if (r->ir_net == net) {
+			ipxrtr_hold(r);
+			goto unlock;
+		}
+	r = NULL;
+unlock:
+	read_unlock_bh(&ipx_routes_lock);
+	return r;
+}
+
+/*
+ * Caller must hold a reference to intrfc
+ */
+int ipxrtr_add_route(__u32 network, struct ipx_interface *intrfc,
+		     unsigned char *node)
+{
+	struct ipx_route *rt;
+	int rc;
+
+	/* Get a route structure; either existing or create */
+	rt = ipxrtr_lookup(network);
+	if (!rt) {
+		rt = kmalloc(sizeof(*rt), GFP_ATOMIC);
+		rc = -EAGAIN;
+		if (!rt)
+			goto out;
+
+		atomic_set(&rt->refcnt, 1);
+		ipxrtr_hold(rt);
+		write_lock_bh(&ipx_routes_lock);
+		list_add(&rt->node, &ipx_routes);
+		write_unlock_bh(&ipx_routes_lock);
+	} else {
+		rc = -EEXIST;
+		if (intrfc == ipx_internal_net)
+			goto out_put;
+	}
+
+	rt->ir_net 	= network;
+	rt->ir_intrfc 	= intrfc;
+	if (!node) {
+		memset(rt->ir_router_node, '\0', IPX_NODE_LEN);
+		rt->ir_routed = 0;
+	} else {
+		memcpy(rt->ir_router_node, node, IPX_NODE_LEN);
+		rt->ir_routed = 1;
+	}
+
+	rc = 0;
+out_put:
+	ipxrtr_put(rt);
+out:
+	return rc;
+}
+
+void ipxrtr_del_routes(struct ipx_interface *intrfc)
+{
+	struct ipx_route *r, *tmp;
+
+	write_lock_bh(&ipx_routes_lock);
+	list_for_each_entry_safe(r, tmp, &ipx_routes, node)
+		if (r->ir_intrfc == intrfc) {
+			list_del(&r->node);
+			ipxrtr_put(r);
+		}
+	write_unlock_bh(&ipx_routes_lock);
+}
+
+static int ipxrtr_create(struct ipx_route_definition *rd)
+{
+	struct ipx_interface *intrfc;
+	int rc = -ENETUNREACH;
+
+	/* Find the appropriate interface */
+	intrfc = ipxitf_find_using_net(rd->ipx_router_network);
+	if (!intrfc)
+		goto out;
+	rc = ipxrtr_add_route(rd->ipx_network, intrfc, rd->ipx_router_node);
+	ipxitf_put(intrfc);
+out:
+	return rc;
+}
+
+static int ipxrtr_delete(long net)
+{
+	struct ipx_route *r, *tmp;
+	int rc;
+
+	write_lock_bh(&ipx_routes_lock);
+	list_for_each_entry_safe(r, tmp, &ipx_routes, node)
+		if (r->ir_net == net) {
+			/* Directly connected; can't lose route */
+			rc = -EPERM;
+			if (!r->ir_routed)
+				goto out;
+			list_del(&r->node);
+			ipxrtr_put(r);
+			rc = 0;
+			goto out;
+		}
+	rc = -ENOENT;
+out:
+	write_unlock_bh(&ipx_routes_lock);
+	return rc;
+}
+
+/*
+ * The skb has to be unshared, we'll end up calling ipxitf_send, that'll
+ * modify the packet
+ */
+int ipxrtr_route_skb(struct sk_buff *skb)
+{
+	struct ipxhdr *ipx = ipx_hdr(skb);
+	struct ipx_route *r = ipxrtr_lookup(IPX_SKB_CB(skb)->ipx_dest_net);
+
+	if (!r) {	/* no known route */
+		kfree_skb(skb);
+		return 0;
+	}
+
+	ipxitf_hold(r->ir_intrfc);
+	ipxitf_send(r->ir_intrfc, skb, r->ir_routed ?
+			r->ir_router_node : ipx->ipx_dest.node);
+	ipxitf_put(r->ir_intrfc);
+	ipxrtr_put(r);
+
+	return 0;
+}
+
+/*
+ * Route an outgoing frame from a socket.
+ */
+int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
+			struct iovec *iov, size_t len, int noblock)
+{
+	struct sk_buff *skb;
+	struct ipx_sock *ipxs = ipx_sk(sk);
+	struct ipx_interface *intrfc;
+	struct ipxhdr *ipx;
+	size_t size;
+	int ipx_offset;
+	struct ipx_route *rt = NULL;
+	int rc;
+
+	/* Find the appropriate interface on which to send packet */
+	if (!usipx->sipx_network && ipx_primary_net) {
+		usipx->sipx_network = ipx_primary_net->if_netnum;
+		intrfc = ipx_primary_net;
+	} else {
+		rt = ipxrtr_lookup(usipx->sipx_network);
+		rc = -ENETUNREACH;
+		if (!rt)
+			goto out;
+		intrfc = rt->ir_intrfc;
+	}
+
+	ipxitf_hold(intrfc);
+	ipx_offset = intrfc->if_ipx_offset;
+	size = sizeof(struct ipxhdr) + len + ipx_offset;
+
+	skb = sock_alloc_send_skb(sk, size, noblock, &rc);
+	if (!skb)
+		goto out_put;
+
+	skb_reserve(skb, ipx_offset);
+	skb->sk = sk;
+
+	/* Fill in IPX header */
+	skb->h.raw = skb->nh.raw = skb_put(skb, sizeof(struct ipxhdr));
+	ipx = ipx_hdr(skb);
+	ipx->ipx_pktsize = htons(len + sizeof(struct ipxhdr));
+	IPX_SKB_CB(skb)->ipx_tctrl = 0;
+	ipx->ipx_type 	 = usipx->sipx_type;
+
+	IPX_SKB_CB(skb)->last_hop.index = -1;
+#ifdef CONFIG_IPX_INTERN
+	IPX_SKB_CB(skb)->ipx_source_net = ipxs->intrfc->if_netnum;
+	memcpy(ipx->ipx_source.node, ipxs->node, IPX_NODE_LEN);
+#else
+	rc = ntohs(ipxs->port);
+	if (rc == 0x453 || rc == 0x452) {
+		/* RIP/SAP special handling for mars_nwe */
+		IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
+		memcpy(ipx->ipx_source.node, intrfc->if_node, IPX_NODE_LEN);
+	} else {
+		IPX_SKB_CB(skb)->ipx_source_net = ipxs->intrfc->if_netnum;
+		memcpy(ipx->ipx_source.node, ipxs->intrfc->if_node,
+			IPX_NODE_LEN);
+	}
+#endif	/* CONFIG_IPX_INTERN */
+	ipx->ipx_source.sock		= ipxs->port;
+	IPX_SKB_CB(skb)->ipx_dest_net	= usipx->sipx_network;
+	memcpy(ipx->ipx_dest.node, usipx->sipx_node, IPX_NODE_LEN);
+	ipx->ipx_dest.sock		= usipx->sipx_port;
+
+	rc = memcpy_fromiovec(skb_put(skb, len), iov, len);
+	if (rc) {
+		kfree_skb(skb);
+		goto out_put;
+	}	
+
+	/* Apply checksum. Not allowed on 802.3 links. */
+	if (sk->sk_no_check || intrfc->if_dlink_type == IPX_FRAME_8023)
+		ipx->ipx_checksum = 0xFFFF;
+	else
+		ipx->ipx_checksum = ipx_cksum(ipx, len + sizeof(struct ipxhdr));
+
+	rc = ipxitf_send(intrfc, skb, (rt && rt->ir_routed) ? 
+			 rt->ir_router_node : ipx->ipx_dest.node);
+out_put:
+	ipxitf_put(intrfc);
+	if (rt)
+		ipxrtr_put(rt);
+out:
+	return rc;
+}
+
+/*
+ * We use a normal struct rtentry for route handling
+ */
+int ipxrtr_ioctl(unsigned int cmd, void __user *arg)
+{
+	struct rtentry rt;	/* Use these to behave like 'other' stacks */
+	struct sockaddr_ipx *sg, *st;
+	int rc = -EFAULT;
+
+	if (copy_from_user(&rt, arg, sizeof(rt)))
+		goto out;
+
+	sg = (struct sockaddr_ipx *)&rt.rt_gateway;
+	st = (struct sockaddr_ipx *)&rt.rt_dst;
+
+	rc = -EINVAL;
+	if (!(rt.rt_flags & RTF_GATEWAY) || /* Direct routes are fixed */
+	    sg->sipx_family != AF_IPX ||
+	    st->sipx_family != AF_IPX)
+		goto out;
+
+	switch (cmd) {
+	case SIOCDELRT:
+		rc = ipxrtr_delete(st->sipx_network);
+		break;
+	case SIOCADDRT: {
+		struct ipx_route_definition f;
+		f.ipx_network		= st->sipx_network;
+		f.ipx_router_network	= sg->sipx_network;
+		memcpy(f.ipx_router_node, sg->sipx_node, IPX_NODE_LEN);
+		rc = ipxrtr_create(&f);
+		break;
+	}
+	}
+
+out:
+	return rc;
+}

net/ipx/sysctl_net_ipx.c

@@ -0,0 +1,62 @@
+/* -*- linux-c -*-
+ * sysctl_net_ipx.c: sysctl interface to net IPX subsystem.
+ *
+ * Begun April 1, 1996, Mike Shaver.
+ * Added /proc/sys/net/ipx directory entry (empty =) ). [MS]
+ * Added /proc/sys/net/ipx/ipx_pprop_broadcasting - acme March 4, 2001
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+
+#ifndef CONFIG_SYSCTL
+#error This file should not be compiled without CONFIG_SYSCTL defined
+#endif
+
+/* From af_ipx.c */
+extern int sysctl_ipx_pprop_broadcasting;
+
+static struct ctl_table ipx_table[] = {
+	{
+		.ctl_name	= NET_IPX_PPROP_BROADCASTING,
+		.procname	= "ipx_pprop_broadcasting",
+		.data		= &sysctl_ipx_pprop_broadcasting,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec,
+	},
+	{ 0 },
+};
+
+static struct ctl_table ipx_dir_table[] = {
+	{
+		.ctl_name	= NET_IPX,
+		.procname	= "ipx",
+		.mode		= 0555,
+		.child		= ipx_table,
+       	},
+	{ 0 },
+};
+
+static struct ctl_table ipx_root_table[] = {
+	{
+		.ctl_name	= CTL_NET,
+		.procname	= "net",
+		.mode		= 0555,
+		.child		= ipx_dir_table,
+	},
+	{ 0 },
+};
+
+static struct ctl_table_header *ipx_table_header;
+
+void ipx_register_sysctl(void)
+{
+	ipx_table_header = register_sysctl_table(ipx_root_table, 1);
+}
+
+void ipx_unregister_sysctl(void)
+{
+	unregister_sysctl_table(ipx_table_header);
+}