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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/802
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
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!
Diffstat (limited to 'net/802')
-rw-r--r--net/802/Makefile15
-rw-r--r--net/802/fc.c130
-rw-r--r--net/802/fddi.c210
-rw-r--r--net/802/hippi.c234
-rw-r--r--net/802/p8022.c65
-rw-r--r--net/802/p8023.c61
-rw-r--r--net/802/psnap.c159
-rw-r--r--net/802/sysctl_net_802.c33
-rw-r--r--net/802/tr.c645
9 files changed, 1552 insertions, 0 deletions
diff --git a/net/802/Makefile b/net/802/Makefile
new file mode 100644
index 00000000000..01861929591
--- /dev/null
+++ b/net/802/Makefile
@@ -0,0 +1,15 @@
+#
+# Makefile for the Linux 802.x protocol layers.
+#
+
+obj-y := p8023.o
+
+# Check the p8022 selections against net/core/Makefile.
+obj-$(CONFIG_SYSCTL) += sysctl_net_802.o
+obj-$(CONFIG_LLC) += p8022.o psnap.o
+obj-$(CONFIG_TR) += p8022.o psnap.o tr.o sysctl_net_802.o
+obj-$(CONFIG_NET_FC) += fc.o
+obj-$(CONFIG_FDDI) += fddi.o
+obj-$(CONFIG_HIPPI) += hippi.o
+obj-$(CONFIG_IPX) += p8022.o psnap.o
+obj-$(CONFIG_ATALK) += p8022.o psnap.o
diff --git a/net/802/fc.c b/net/802/fc.c
new file mode 100644
index 00000000000..640d34e026c
--- /dev/null
+++ b/net/802/fc.c
@@ -0,0 +1,130 @@
+/*
+ * NET3: Fibre Channel device handling subroutines
+ *
+ * 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.
+ *
+ * Vineet Abraham <vma@iol.unh.edu>
+ * v 1.0 03/22/99
+ */
+
+#include <linux/config.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/fcdevice.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <linux/net.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <net/arp.h>
+
+/*
+ * Put the headers on a Fibre Channel packet.
+ */
+
+static int fc_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ void *daddr, void *saddr, unsigned len)
+{
+ struct fch_hdr *fch;
+ int hdr_len;
+
+ /*
+ * Add the 802.2 SNAP header if IP as the IPv4 code calls
+ * dev->hard_header directly.
+ */
+ if (type == ETH_P_IP || type == ETH_P_ARP)
+ {
+ struct fcllc *fcllc;
+
+ hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);
+ fch = (struct fch_hdr *)skb_push(skb, hdr_len);
+ fcllc = (struct fcllc *)(fch+1);
+ fcllc->dsap = fcllc->ssap = EXTENDED_SAP;
+ fcllc->llc = UI_CMD;
+ fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;
+ fcllc->ethertype = htons(type);
+ }
+ else
+ {
+ hdr_len = sizeof(struct fch_hdr);
+ fch = (struct fch_hdr *)skb_push(skb, hdr_len);
+ }
+
+ if(saddr)
+ memcpy(fch->saddr,saddr,dev->addr_len);
+ else
+ memcpy(fch->saddr,dev->dev_addr,dev->addr_len);
+
+ if(daddr)
+ {
+ memcpy(fch->daddr,daddr,dev->addr_len);
+ return(hdr_len);
+ }
+ return -hdr_len;
+}
+
+/*
+ * A neighbour discovery of some species (eg arp) has completed. We
+ * can now send the packet.
+ */
+
+static int fc_rebuild_header(struct sk_buff *skb)
+{
+ struct fch_hdr *fch=(struct fch_hdr *)skb->data;
+ struct fcllc *fcllc=(struct fcllc *)(skb->data+sizeof(struct fch_hdr));
+ if(fcllc->ethertype != htons(ETH_P_IP)) {
+ printk("fc_rebuild_header: Don't know how to resolve type %04X addresses ?\n",(unsigned int)htons(fcllc->ethertype));
+ return 0;
+ }
+#ifdef CONFIG_INET
+ return arp_find(fch->daddr, skb);
+#else
+ return 0;
+#endif
+}
+
+static void fc_setup(struct net_device *dev)
+{
+ dev->hard_header = fc_header;
+ dev->rebuild_header = fc_rebuild_header;
+
+ dev->type = ARPHRD_IEEE802;
+ dev->hard_header_len = FC_HLEN;
+ dev->mtu = 2024;
+ dev->addr_len = FC_ALEN;
+ dev->tx_queue_len = 100; /* Long queues on fc */
+ dev->flags = IFF_BROADCAST;
+
+ memset(dev->broadcast, 0xFF, FC_ALEN);
+}
+
+/**
+ * alloc_fcdev - Register fibre channel device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ * for this fibre channel device
+ *
+ * Fill in the fields of the device structure with fibre channel-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+struct net_device *alloc_fcdev(int sizeof_priv)
+{
+ return alloc_netdev(sizeof_priv, "fc%d", fc_setup);
+}
+EXPORT_SYMBOL(alloc_fcdev);
diff --git a/net/802/fddi.c b/net/802/fddi.c
new file mode 100644
index 00000000000..f9a31a9f70f
--- /dev/null
+++ b/net/802/fddi.c
@@ -0,0 +1,210 @@
+/*
+ * 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.
+ *
+ * FDDI-type device handling.
+ *
+ * Version: @(#)fddi.c 1.0.0 08/12/96
+ *
+ * Authors: Lawrence V. Stefani, <stefani@lkg.dec.com>
+ *
+ * fddi.c is based on previous eth.c and tr.c work by
+ * Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Mark Evans, <evansmp@uhura.aston.ac.uk>
+ * Florian La Roche, <rzsfl@rz.uni-sb.de>
+ * Alan Cox, <gw4pts@gw4pts.ampr.org>
+ *
+ * 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.
+ *
+ * Changes
+ * Alan Cox : New arp/rebuild header
+ * Maciej W. Rozycki : IPv6 support
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <asm/system.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/fddidevice.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <net/arp.h>
+#include <net/sock.h>
+
+/*
+ * Create the FDDI MAC header for an arbitrary protocol layer
+ *
+ * saddr=NULL means use device source address
+ * daddr=NULL means leave destination address (eg unresolved arp)
+ */
+
+static int fddi_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ void *daddr, void *saddr, unsigned len)
+{
+ int hl = FDDI_K_SNAP_HLEN;
+ struct fddihdr *fddi;
+
+ if(type != ETH_P_IP && type != ETH_P_IPV6 && type != ETH_P_ARP)
+ hl=FDDI_K_8022_HLEN-3;
+ fddi = (struct fddihdr *)skb_push(skb, hl);
+ fddi->fc = FDDI_FC_K_ASYNC_LLC_DEF;
+ if(type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
+ {
+ fddi->hdr.llc_snap.dsap = FDDI_EXTENDED_SAP;
+ fddi->hdr.llc_snap.ssap = FDDI_EXTENDED_SAP;
+ fddi->hdr.llc_snap.ctrl = FDDI_UI_CMD;
+ fddi->hdr.llc_snap.oui[0] = 0x00;
+ fddi->hdr.llc_snap.oui[1] = 0x00;
+ fddi->hdr.llc_snap.oui[2] = 0x00;
+ fddi->hdr.llc_snap.ethertype = htons(type);
+ }
+
+ /* Set the source and destination hardware addresses */
+
+ if (saddr != NULL)
+ memcpy(fddi->saddr, saddr, dev->addr_len);
+ else
+ memcpy(fddi->saddr, dev->dev_addr, dev->addr_len);
+
+ if (daddr != NULL)
+ {
+ memcpy(fddi->daddr, daddr, dev->addr_len);
+ return(hl);
+ }
+
+ return(-hl);
+}
+
+
+/*
+ * Rebuild the FDDI MAC header. This is called after an ARP
+ * (or in future other address resolution) has completed on
+ * this sk_buff. We now let ARP fill in the other fields.
+ */
+
+static int fddi_rebuild_header(struct sk_buff *skb)
+{
+ struct fddihdr *fddi = (struct fddihdr *)skb->data;
+
+#ifdef CONFIG_INET
+ if (fddi->hdr.llc_snap.ethertype == __constant_htons(ETH_P_IP))
+ /* Try to get ARP to resolve the header and fill destination address */
+ return arp_find(fddi->daddr, skb);
+ else
+#endif
+ {
+ printk("%s: Don't know how to resolve type %02X addresses.\n",
+ skb->dev->name, htons(fddi->hdr.llc_snap.ethertype));
+ return(0);
+ }
+}
+
+
+/*
+ * Determine the packet's protocol ID and fill in skb fields.
+ * This routine is called before an incoming packet is passed
+ * up. It's used to fill in specific skb fields and to set
+ * the proper pointer to the start of packet data (skb->data).
+ */
+
+unsigned short fddi_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct fddihdr *fddi = (struct fddihdr *)skb->data;
+ unsigned short type;
+
+ /*
+ * Set mac.raw field to point to FC byte, set data field to point
+ * to start of packet data. Assume 802.2 SNAP frames for now.
+ */
+
+ skb->mac.raw = skb->data; /* point to frame control (FC) */
+
+ if(fddi->hdr.llc_8022_1.dsap==0xe0)
+ {
+ skb_pull(skb, FDDI_K_8022_HLEN-3);
+ type = __constant_htons(ETH_P_802_2);
+ }
+ else
+ {
+ skb_pull(skb, FDDI_K_SNAP_HLEN); /* adjust for 21 byte header */
+ type=fddi->hdr.llc_snap.ethertype;
+ }
+
+ /* Set packet type based on destination address and flag settings */
+
+ if (*fddi->daddr & 0x01)
+ {
+ if (memcmp(fddi->daddr, dev->broadcast, FDDI_K_ALEN) == 0)
+ skb->pkt_type = PACKET_BROADCAST;
+ else
+ skb->pkt_type = PACKET_MULTICAST;
+ }
+
+ else if (dev->flags & IFF_PROMISC)
+ {
+ if (memcmp(fddi->daddr, dev->dev_addr, FDDI_K_ALEN))
+ skb->pkt_type = PACKET_OTHERHOST;
+ }
+
+ /* Assume 802.2 SNAP frames, for now */
+
+ return(type);
+}
+
+EXPORT_SYMBOL(fddi_type_trans);
+
+static int fddi_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if ((new_mtu < FDDI_K_SNAP_HLEN) || (new_mtu > FDDI_K_SNAP_DLEN))
+ return(-EINVAL);
+ dev->mtu = new_mtu;
+ return(0);
+}
+
+static void fddi_setup(struct net_device *dev)
+{
+ dev->change_mtu = fddi_change_mtu;
+ dev->hard_header = fddi_header;
+ dev->rebuild_header = fddi_rebuild_header;
+
+ dev->type = ARPHRD_FDDI;
+ dev->hard_header_len = FDDI_K_SNAP_HLEN+3; /* Assume 802.2 SNAP hdr len + 3 pad bytes */
+ dev->mtu = FDDI_K_SNAP_DLEN; /* Assume max payload of 802.2 SNAP frame */
+ dev->addr_len = FDDI_K_ALEN;
+ dev->tx_queue_len = 100; /* Long queues on FDDI */
+ dev->flags = IFF_BROADCAST | IFF_MULTICAST;
+
+ memset(dev->broadcast, 0xFF, FDDI_K_ALEN);
+}
+
+/**
+ * alloc_fddidev - Register FDDI device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ * for this FDDI device
+ *
+ * Fill in the fields of the device structure with FDDI-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+struct net_device *alloc_fddidev(int sizeof_priv)
+{
+ return alloc_netdev(sizeof_priv, "fddi%d", fddi_setup);
+}
+EXPORT_SYMBOL(alloc_fddidev);
diff --git a/net/802/hippi.c b/net/802/hippi.c
new file mode 100644
index 00000000000..4eb135c0afb
--- /dev/null
+++ b/net/802/hippi.c
@@ -0,0 +1,234 @@
+/*
+ * 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.
+ *
+ * HIPPI-type device handling.
+ *
+ * Version: @(#)hippi.c 1.0.0 05/29/97
+ *
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Mark Evans, <evansmp@uhura.aston.ac.uk>
+ * Florian La Roche, <rzsfl@rz.uni-sb.de>
+ * Alan Cox, <gw4pts@gw4pts.ampr.org>
+ * Jes Sorensen, <Jes.Sorensen@cern.ch>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/hippidevice.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <net/arp.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include <asm/checksum.h>
+#include <asm/system.h>
+
+/*
+ * Create the HIPPI MAC header for an arbitrary protocol layer
+ *
+ * saddr=NULL means use device source address
+ * daddr=NULL means leave destination address (eg unresolved arp)
+ */
+
+static int hippi_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, void *daddr, void *saddr,
+ unsigned len)
+{
+ struct hippi_hdr *hip = (struct hippi_hdr *)skb_push(skb, HIPPI_HLEN);
+
+ if (!len){
+ len = skb->len - HIPPI_HLEN;
+ printk("hippi_header(): length not supplied\n");
+ }
+
+ /*
+ * Due to the stupidity of the little endian byte-order we
+ * have to set the fp field this way.
+ */
+ hip->fp.fixed = __constant_htonl(0x04800018);
+ hip->fp.d2_size = htonl(len + 8);
+ hip->le.fc = 0;
+ hip->le.double_wide = 0; /* only HIPPI 800 for the time being */
+ hip->le.message_type = 0; /* Data PDU */
+
+ hip->le.dest_addr_type = 2; /* 12 bit SC address */
+ hip->le.src_addr_type = 2; /* 12 bit SC address */
+
+ memcpy(hip->le.src_switch_addr, dev->dev_addr + 3, 3);
+ memset(&hip->le.reserved, 0, 16);
+
+ hip->snap.dsap = HIPPI_EXTENDED_SAP;
+ hip->snap.ssap = HIPPI_EXTENDED_SAP;
+ hip->snap.ctrl = HIPPI_UI_CMD;
+ hip->snap.oui[0] = 0x00;
+ hip->snap.oui[1] = 0x00;
+ hip->snap.oui[2] = 0x00;
+ hip->snap.ethertype = htons(type);
+
+ if (daddr)
+ {
+ memcpy(hip->le.dest_switch_addr, daddr + 3, 3);
+ memcpy(&skb->private.ifield, daddr + 2, 4);
+ return HIPPI_HLEN;
+ }
+ return -((int)HIPPI_HLEN);
+}
+
+
+/*
+ * Rebuild the HIPPI MAC header. This is called after an ARP has
+ * completed on this sk_buff. We now let ARP fill in the other fields.
+ */
+
+static int hippi_rebuild_header(struct sk_buff *skb)
+{
+ struct hippi_hdr *hip = (struct hippi_hdr *)skb->data;
+
+ /*
+ * Only IP is currently supported
+ */
+
+ if(hip->snap.ethertype != __constant_htons(ETH_P_IP))
+ {
+ printk(KERN_DEBUG "%s: unable to resolve type %X addresses.\n",skb->dev->name,ntohs(hip->snap.ethertype));
+ return 0;
+ }
+
+ /*
+ * We don't support dynamic ARP on HIPPI, but we use the ARP
+ * static ARP tables to hold the I-FIELDs.
+ */
+ return arp_find(hip->le.daddr, skb);
+}
+
+
+/*
+ * Determine the packet's protocol ID.
+ */
+
+unsigned short hippi_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct hippi_hdr *hip;
+
+ hip = (struct hippi_hdr *) skb->data;
+
+ /*
+ * This is actually wrong ... question is if we really should
+ * set the raw address here.
+ */
+ skb->mac.raw = skb->data;
+ skb_pull(skb, HIPPI_HLEN);
+
+ /*
+ * No fancy promisc stuff here now.
+ */
+
+ return hip->snap.ethertype;
+}
+
+EXPORT_SYMBOL(hippi_type_trans);
+
+static int hippi_change_mtu(struct net_device *dev, int new_mtu)
+{
+ /*
+ * HIPPI's got these nice large MTUs.
+ */
+ if ((new_mtu < 68) || (new_mtu > 65280))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return(0);
+}
+
+/*
+ * For HIPPI we will actually use the lower 4 bytes of the hardware
+ * address as the I-FIELD rather than the actual hardware address.
+ */
+static int hippi_mac_addr(struct net_device *dev, void *p)
+{
+ struct sockaddr *addr = p;
+ if (netif_running(dev))
+ return -EBUSY;
+ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+ return 0;
+}
+
+static int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
+{
+ /* Never send broadcast/multicast ARP messages */
+ p->mcast_probes = 0;
+
+ /* In IPv6 unicast probes are valid even on NBMA,
+ * because they are encapsulated in normal IPv6 protocol.
+ * Should be a generic flag.
+ */
+ if (p->tbl->family != AF_INET6)
+ p->ucast_probes = 0;
+ return 0;
+}
+
+static void hippi_setup(struct net_device *dev)
+{
+ dev->set_multicast_list = NULL;
+ dev->change_mtu = hippi_change_mtu;
+ dev->hard_header = hippi_header;
+ dev->rebuild_header = hippi_rebuild_header;
+ dev->set_mac_address = hippi_mac_addr;
+ dev->hard_header_parse = NULL;
+ dev->hard_header_cache = NULL;
+ dev->header_cache_update = NULL;
+ dev->neigh_setup = hippi_neigh_setup_dev;
+
+ /*
+ * We don't support HIPPI `ARP' for the time being, and probably
+ * never will unless someone else implements it. However we
+ * still need a fake ARPHRD to make ifconfig and friends play ball.
+ */
+ dev->type = ARPHRD_HIPPI;
+ dev->hard_header_len = HIPPI_HLEN;
+ dev->mtu = 65280;
+ dev->addr_len = HIPPI_ALEN;
+ dev->tx_queue_len = 25 /* 5 */;
+ memset(dev->broadcast, 0xFF, HIPPI_ALEN);
+
+
+ /*
+ * HIPPI doesn't support broadcast+multicast and we only use
+ * static ARP tables. ARP is disabled by hippi_neigh_setup_dev.
+ */
+ dev->flags = 0;
+}
+
+/**
+ * alloc_hippi_dev - Register HIPPI device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ * for this HIPPI device
+ *
+ * Fill in the fields of the device structure with HIPPI-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+
+struct net_device *alloc_hippi_dev(int sizeof_priv)
+{
+ return alloc_netdev(sizeof_priv, "hip%d", hippi_setup);
+}
+
+EXPORT_SYMBOL(alloc_hippi_dev);
diff --git a/net/802/p8022.c b/net/802/p8022.c
new file mode 100644
index 00000000000..5ae63416df6
--- /dev/null
+++ b/net/802/p8022.c
@@ -0,0 +1,65 @@
+/*
+ * NET3: Support for 802.2 demultiplexing off Ethernet (Token ring
+ * is kept separate see p8022tr.c)
+ * 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.
+ *
+ * Demultiplex 802.2 encoded protocols. We match the entry by the
+ * SSAP/DSAP pair and then deliver to the registered datalink that
+ * matches. The control byte is ignored and handling of such items
+ * is up to the routine passed the frame.
+ *
+ * Unlike the 802.3 datalink we have a list of 802.2 entries as
+ * there are multiple protocols to demux. The list is currently
+ * short (3 or 4 entries at most). The current demux assumes this.
+ */
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/datalink.h>
+#include <linux/mm.h>
+#include <linux/in.h>
+#include <linux/init.h>
+#include <net/llc.h>
+#include <net/p8022.h>
+
+static int p8022_request(struct datalink_proto *dl, struct sk_buff *skb,
+ unsigned char *dest)
+{
+ llc_build_and_send_ui_pkt(dl->sap, skb, dest, dl->sap->laddr.lsap);
+ return 0;
+}
+
+struct datalink_proto *register_8022_client(unsigned char type,
+ int (*func)(struct sk_buff *skb,
+ struct net_device *dev,
+ struct packet_type *pt))
+{
+ struct datalink_proto *proto;
+
+ proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
+ if (proto) {
+ proto->type[0] = type;
+ proto->header_length = 3;
+ proto->request = p8022_request;
+ proto->sap = llc_sap_open(type, func);
+ if (!proto->sap) {
+ kfree(proto);
+ proto = NULL;
+ }
+ }
+ return proto;
+}
+
+void unregister_8022_client(struct datalink_proto *proto)
+{
+ llc_sap_close(proto->sap);
+ kfree(proto);
+}
+
+EXPORT_SYMBOL(register_8022_client);
+EXPORT_SYMBOL(unregister_8022_client);
+
+MODULE_LICENSE("GPL");
diff --git a/net/802/p8023.c b/net/802/p8023.c
new file mode 100644
index 00000000000..a0b61b40225
--- /dev/null
+++ b/net/802/p8023.c
@@ -0,0 +1,61 @@
+/*
+ * NET3: 802.3 data link hooks used for IPX 802.3
+ *
+ * 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.
+ *
+ * 802.3 isn't really a protocol data link layer. Some old IPX stuff
+ * uses it however. Note that there is only one 802.3 protocol layer
+ * in the system. We don't currently support different protocols
+ * running raw 802.3 on different devices. Thankfully nobody else
+ * has done anything like the old IPX.
+ */
+
+#include <linux/in.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+#include <net/datalink.h>
+
+/*
+ * Place an 802.3 header on a packet. The driver will do the mac
+ * addresses, we just need to give it the buffer length.
+ */
+static int p8023_request(struct datalink_proto *dl,
+ struct sk_buff *skb, unsigned char *dest_node)
+{
+ struct net_device *dev = skb->dev;
+
+ dev->hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
+ return dev_queue_xmit(skb);
+}
+
+/*
+ * Create an 802.3 client. Note there can be only one 802.3 client
+ */
+struct datalink_proto *make_8023_client(void)
+{
+ struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
+
+ if (proto) {
+ proto->header_length = 0;
+ proto->request = p8023_request;
+ }
+ return proto;
+}
+
+/*
+ * Destroy the 802.3 client.
+ */
+void destroy_8023_client(struct datalink_proto *dl)
+{
+ if (dl)
+ kfree(dl);
+}
+
+EXPORT_SYMBOL(destroy_8023_client);
+EXPORT_SYMBOL(make_8023_client);
diff --git a/net/802/psnap.c b/net/802/psnap.c
new file mode 100644
index 00000000000..1053821ddf9
--- /dev/null
+++ b/net/802/psnap.c
@@ -0,0 +1,159 @@
+/*
+ * SNAP data link layer. Derived from 802.2
+ *
+ * Alan Cox <Alan.Cox@linux.org>,
+ * from the 802.2 layer by Greg Page.
+ * Merged in additions from Greg Page's psnap.c.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/datalink.h>
+#include <net/llc.h>
+#include <net/psnap.h>
+#include <linux/mm.h>
+#include <linux/in.h>
+#include <linux/init.h>
+
+static LIST_HEAD(snap_list);
+static DEFINE_SPINLOCK(snap_lock);
+static struct llc_sap *snap_sap;
+
+/*
+ * Find a snap client by matching the 5 bytes.
+ */
+static struct datalink_proto *find_snap_client(unsigned char *desc)
+{
+ struct list_head *entry;
+ struct datalink_proto *proto = NULL, *p;
+
+ list_for_each_rcu(entry, &snap_list) {
+ p = list_entry(entry, struct datalink_proto, node);
+ if (!memcmp(p->type, desc, 5)) {
+ proto = p;
+ break;
+ }
+ }
+ return proto;
+}
+
+/*
+ * A SNAP packet has arrived
+ */
+static int snap_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt)
+{
+ int rc = 1;
+ struct datalink_proto *proto;
+ static struct packet_type snap_packet_type = {
+ .type = __constant_htons(ETH_P_SNAP),
+ };
+
+ rcu_read_lock();
+ proto = find_snap_client(skb->h.raw);
+ if (proto) {
+ /* Pass the frame on. */
+ skb->h.raw += 5;
+ skb_pull(skb, 5);
+ rc = proto->rcvfunc(skb, dev, &snap_packet_type);
+ } else {
+ skb->sk = NULL;
+ kfree_skb(skb);
+ rc = 1;
+ }
+
+ rcu_read_unlock();
+ return rc;
+}
+
+/*
+ * Put a SNAP header on a frame and pass to 802.2
+ */
+static int snap_request(struct datalink_proto *dl,
+ struct sk_buff *skb, u8 *dest)
+{
+ memcpy(skb_push(skb, 5), dl->type, 5);
+ llc_build_and_send_ui_pkt(snap_sap, skb, dest, snap_sap->laddr.lsap);
+ return 0;
+}
+
+/*
+ * Set up the SNAP layer
+ */
+EXPORT_SYMBOL(register_snap_client);
+EXPORT_SYMBOL(unregister_snap_client);
+
+static char snap_err_msg[] __initdata =
+ KERN_CRIT "SNAP - unable to register with 802.2\n";
+
+static int __init snap_init(void)
+{
+ snap_sap = llc_sap_open(0xAA, snap_rcv);
+
+ if (!snap_sap)
+ printk(snap_err_msg);
+
+ return 0;
+}
+
+module_init(snap_init);
+
+static void __exit snap_exit(void)
+{
+ llc_sap_close(snap_sap);
+}
+
+module_exit(snap_exit);
+
+
+/*
+ * Register SNAP clients. We don't yet use this for IP.
+ */
+struct datalink_proto *register_snap_client(unsigned char *desc,
+ int (*rcvfunc)(struct sk_buff *,
+ struct net_device *,
+ struct packet_type *))
+{
+ struct datalink_proto *proto = NULL;
+
+ spin_lock_bh(&snap_lock);
+
+ if (find_snap_client(desc))
+ goto out;
+
+ proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
+ if (proto) {
+ memcpy(proto->type, desc,5);
+ proto->rcvfunc = rcvfunc;
+ proto->header_length = 5 + 3; /* snap + 802.2 */
+ proto->request = snap_request;
+ list_add_rcu(&proto->node, &snap_list);
+ }
+out:
+ spin_unlock_bh(&snap_lock);
+
+ synchronize_net();
+ return proto;
+}
+
+/*
+ * Unregister SNAP clients. Protocols no longer want to play with us ...
+ */
+void unregister_snap_client(struct datalink_proto *proto)
+{
+ spin_lock_bh(&snap_lock);
+ list_del_rcu(&proto->node);
+ spin_unlock_bh(&snap_lock);
+
+ synchronize_net();
+
+ kfree(proto);
+}
+
+MODULE_LICENSE("GPL");
diff --git a/net/802/sysctl_net_802.c b/net/802/sysctl_net_802.c
new file mode 100644
index 00000000000..36079630c49
--- /dev/null
+++ b/net/802/sysctl_net_802.c
@@ -0,0 +1,33 @@
+/* -*- linux-c -*-
+ * sysctl_net_802.c: sysctl interface to net 802 subsystem.
+ *
+ * Begun April 1, 1996, Mike Shaver.
+ * Added /proc/sys/net/802 directory entry (empty =) ). [MS]
+ *
+ * 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.
+ */
+
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/config.h>
+
+#ifdef CONFIG_TR
+extern int sysctl_tr_rif_timeout;
+#endif
+
+struct ctl_table tr_table[] = {
+#ifdef CONFIG_TR
+ {
+ .ctl_name = NET_TR_RIF_TIMEOUT,
+ .procname = "rif_timeout",
+ .data = &sysctl_tr_rif_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+#endif /* CONFIG_TR */
+ { 0 },
+};
diff --git a/net/802/tr.c b/net/802/tr.c
new file mode 100644
index 00000000000..85293ccf7ef
--- /dev/null
+++ b/net/802/tr.c
@@ -0,0 +1,645 @@
+/*
+ * NET3: Token ring device handling subroutines
+ *
+ * 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.
+ *
+ * Fixes: 3 Feb 97 Paul Norton <pnorton@cts.com> Minor routing fixes.
+ * Added rif table to /proc/net/tr_rif and rif timeout to
+ * /proc/sys/net/token-ring/rif_timeout.
+ * 22 Jun 98 Paul Norton <p.norton@computer.org> Rearranged
+ * tr_header and tr_type_trans to handle passing IPX SNAP and
+ * 802.2 through the correct layers. Eliminated tr_reformat.
+ *
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/trdevice.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <linux/net.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <net/arp.h>
+
+static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev);
+static void rif_check_expire(unsigned long dummy);
+
+#define TR_SR_DEBUG 0
+
+/*
+ * Each RIF entry we learn is kept this way
+ */
+
+struct rif_cache_s {
+ unsigned char addr[TR_ALEN];
+ int iface;
+ __u16 rcf;
+ __u16 rseg[8];
+ struct rif_cache_s *next;
+ unsigned long last_used;
+ unsigned char local_ring;
+};
+
+#define RIF_TABLE_SIZE 32
+
+/*
+ * We hash the RIF cache 32 ways. We do after all have to look it
+ * up a lot.
+ */
+
+static struct rif_cache_s *rif_table[RIF_TABLE_SIZE];
+
+static DEFINE_SPINLOCK(rif_lock);
+
+
+/*
+ * Garbage disposal timer.
+ */
+
+static struct timer_list rif_timer;
+
+int sysctl_tr_rif_timeout = 60*10*HZ;
+
+static inline unsigned long rif_hash(const unsigned char *addr)
+{
+ unsigned long x;
+
+ x = addr[0];
+ x = (x << 2) ^ addr[1];
+ x = (x << 2) ^ addr[2];
+ x = (x << 2) ^ addr[3];
+ x = (x << 2) ^ addr[4];
+ x = (x << 2) ^ addr[5];
+
+ x ^= x >> 8;
+
+ return x & (RIF_TABLE_SIZE - 1);
+}
+
+/*
+ * Put the headers on a token ring packet. Token ring source routing
+ * makes this a little more exciting than on ethernet.
+ */
+
+static int tr_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ void *daddr, void *saddr, unsigned len)
+{
+ struct trh_hdr *trh;
+ int hdr_len;
+
+ /*
+ * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls
+ * dev->hard_header directly.
+ */
+ if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
+ {
+ struct trllc *trllc;
+
+ hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc);
+ trh = (struct trh_hdr *)skb_push(skb, hdr_len);
+ trllc = (struct trllc *)(trh+1);
+ trllc->dsap = trllc->ssap = EXTENDED_SAP;
+ trllc->llc = UI_CMD;
+ trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00;
+ trllc->ethertype = htons(type);
+ }
+ else
+ {
+ hdr_len = sizeof(struct trh_hdr);
+ trh = (struct trh_hdr *)skb_push(skb, hdr_len);
+ }
+
+ trh->ac=AC;
+ trh->fc=LLC_FRAME;
+
+ if(saddr)
+ memcpy(trh->saddr,saddr,dev->addr_len);
+ else
+ memcpy(trh->saddr,dev->dev_addr,dev->addr_len);
+
+ /*
+ * Build the destination and then source route the frame
+ */
+
+ if(daddr)
+ {
+ memcpy(trh->daddr,daddr,dev->addr_len);
+ tr_source_route(skb,trh,dev);
+ return(hdr_len);
+ }
+
+ return -hdr_len;
+}
+
+/*
+ * A neighbour discovery of some species (eg arp) has completed. We
+ * can now send the packet.
+ */
+
+static int tr_rebuild_header(struct sk_buff *skb)
+{
+ struct trh_hdr *trh=(struct trh_hdr *)skb->data;
+ struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr));
+ struct net_device *dev = skb->dev;
+
+ /*
+ * FIXME: We don't yet support IPv6 over token rings
+ */
+
+ if(trllc->ethertype != htons(ETH_P_IP)) {
+ printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n",(unsigned int)htons(trllc->ethertype));
+ return 0;
+ }
+
+#ifdef CONFIG_INET
+ if(arp_find(trh->daddr, skb)) {
+ return 1;
+ }
+ else
+#endif
+ {
+ tr_source_route(skb,trh,dev);
+ return 0;
+ }
+}
+
+/*
+ * Some of this is a bit hackish. We intercept RIF information
+ * used for source routing. We also grab IP directly and don't feed
+ * it via SNAP.
+ */
+
+unsigned short tr_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+
+ struct trh_hdr *trh=(struct trh_hdr *)skb->data;
+ struct trllc *trllc;
+ unsigned riflen=0;
+
+ skb->mac.raw = skb->data;
+
+ if(trh->saddr[0] & TR_RII)
+ riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
+
+ trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
+
+ skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
+
+ if(*trh->daddr & 0x80)
+ {
+ if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN))
+ skb->pkt_type=PACKET_BROADCAST;
+ else
+ skb->pkt_type=PACKET_MULTICAST;
+ }
+ else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E))
+ {
+ skb->pkt_type=PACKET_MULTICAST;
+ }
+ else if(dev->flags & IFF_PROMISC)
+ {
+ if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN))
+ skb->pkt_type=PACKET_OTHERHOST;
+ }
+
+ if ((skb->pkt_type != PACKET_BROADCAST) &&
+ (skb->pkt_type != PACKET_MULTICAST))
+ tr_add_rif_info(trh,dev) ;
+
+ /*
+ * Strip the SNAP header from ARP packets since we don't
+ * pass them through to the 802.2/SNAP layers.
+ */
+
+ if (trllc->dsap == EXTENDED_SAP &&
+ (trllc->ethertype == ntohs(ETH_P_IP) ||
+ trllc->ethertype == ntohs(ETH_P_IPV6) ||
+ trllc->ethertype == ntohs(ETH_P_ARP)))
+ {
+ skb_pull(skb, sizeof(struct trllc));
+ return trllc->ethertype;
+ }
+
+ return ntohs(ETH_P_802_2);
+}
+
+/*
+ * We try to do source routing...
+ */
+
+void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev)
+{
+ int slack;
+ unsigned int hash;
+ struct rif_cache_s *entry;
+ unsigned char *olddata;
+ static const unsigned char mcast_func_addr[]
+ = {0xC0,0x00,0x00,0x04,0x00,0x00};
+
+ spin_lock_bh(&rif_lock);
+
+ /*
+ * Broadcasts are single route as stated in RFC 1042
+ */
+ if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) ||
+ (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) )
+ {
+ trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
+ | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
+ trh->saddr[0]|=TR_RII;
+ }
+ else
+ {
+ hash = rif_hash(trh->daddr);
+ /*
+ * Walk the hash table and look for an entry
+ */
+ for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next);
+
+ /*
+ * If we found an entry we can route the frame.
+ */
+ if(entry)
+ {
+#if TR_SR_DEBUG
+printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0],
+ trh->daddr[1],trh->daddr[2],trh->daddr[3],trh->daddr[4],trh->daddr[5]);
+#endif
+ if(!entry->local_ring && (ntohs(entry->rcf) & TR_RCF_LEN_MASK) >> 8)
+ {
+ trh->rcf=entry->rcf;
+ memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short));
+ trh->rcf^=htons(TR_RCF_DIR_BIT);
+ trh->rcf&=htons(0x1fff); /* Issam Chehab <ichehab@madge1.demon.co.uk> */
+
+ trh->saddr[0]|=TR_RII;
+#if TR_SR_DEBUG
+ printk("entry found with rcf %04x\n", entry->rcf);
+ }
+ else
+ {
+ printk("entry found but without rcf length, local=%02x\n", entry->local_ring);
+#endif
+ }
+ entry->last_used=jiffies;
+ }
+ else
+ {
+ /*
+ * Without the information we simply have to shout
+ * on the wire. The replies should rapidly clean this
+ * situation up.
+ */
+ trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
+ | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
+ trh->saddr[0]|=TR_RII;
+#if TR_SR_DEBUG
+ printk("no entry in rif table found - broadcasting frame\n");
+#endif
+ }
+ }
+
+ /* Compress the RIF here so we don't have to do it in the driver(s) */
+ if (!(trh->saddr[0] & 0x80))
+ slack = 18;
+ else
+ slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8);
+ olddata = skb->data;
+ spin_unlock_bh(&rif_lock);
+
+ skb_pull(skb, slack);
+ memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack);
+}
+
+/*
+ * We have learned some new RIF information for our source
+ * routing.
+ */
+
+static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev)
+{
+ unsigned int hash, rii_p = 0;
+ struct rif_cache_s *entry;
+
+
+ spin_lock_bh(&rif_lock);
+
+ /*
+ * Firstly see if the entry exists
+ */
+
+ if(trh->saddr[0] & TR_RII)
+ {
+ trh->saddr[0]&=0x7f;
+ if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2)
+ {
+ rii_p = 1;
+ }
+ }
+
+ hash = rif_hash(trh->saddr);
+ for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next);
+
+ if(entry==NULL)
+ {
+#if TR_SR_DEBUG
+printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n",
+ trh->saddr[0],trh->saddr[1],trh->saddr[2],
+ trh->saddr[3],trh->saddr[4],trh->saddr[5],
+ ntohs(trh->rcf));
+#endif
+ /*
+ * Allocate our new entry. A failure to allocate loses
+ * use the information. This is harmless.
+ *
+ * FIXME: We ought to keep some kind of cache size
+ * limiting and adjust the timers to suit.
+ */
+ entry=kmalloc(sizeof(struct rif_cache_s),GFP_ATOMIC);
+
+ if(!entry)
+ {
+ printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n");
+ spin_unlock_bh(&rif_lock);
+ return;
+ }
+
+ memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);
+ entry->iface = dev->ifindex;
+ entry->next=rif_table[hash];
+ entry->last_used=jiffies;
+ rif_table[hash]=entry;
+
+ if (rii_p)
+ {
+ entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
+ memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
+ entry->local_ring = 0;
+ trh->saddr[0]|=TR_RII; /* put the routing indicator back for tcpdump */
+ }
+ else
+ {
+ entry->local_ring = 1;
+ }
+ }
+ else /* Y. Tahara added */
+ {
+ /*
+ * Update existing entries
+ */
+ if (!entry->local_ring)
+ if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) &&
+ !(trh->rcf & htons(TR_RCF_BROADCAST_MASK)))
+ {
+#if TR_SR_DEBUG
+printk("updating rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n",
+ trh->saddr[0],trh->saddr[1],trh->saddr[2],
+ trh->saddr[3],trh->saddr[4],trh->saddr[5],
+ ntohs(trh->rcf));
+#endif
+ entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
+ memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
+ }
+ entry->last_used=jiffies;
+ }
+ spin_unlock_bh(&rif_lock);
+}
+
+/*
+ * Scan the cache with a timer and see what we need to throw out.
+ */
+
+static void rif_check_expire(unsigned long dummy)
+{
+ int i;
+ unsigned long next_interval = jiffies + sysctl_tr_rif_timeout/2;
+
+ spin_lock_bh(&rif_lock);
+
+ for(i =0; i < RIF_TABLE_SIZE; i++) {
+ struct rif_cache_s *entry, **pentry;
+
+ pentry = rif_table+i;
+ while((entry=*pentry) != NULL) {
+ unsigned long expires
+ = entry->last_used + sysctl_tr_rif_timeout;
+
+ if (time_before_eq(expires, jiffies)) {
+ *pentry = entry->next;
+ kfree(entry);
+ } else {
+ pentry = &entry->next;
+
+ if (time_before(expires, next_interval))
+ next_interval = expires;
+ }
+ }
+ }
+
+ spin_unlock_bh(&rif_lock);
+
+ mod_timer(&rif_timer, next_interval);
+
+}
+
+/*
+ * Generate the /proc/net information for the token ring RIF
+ * routing.
+ */
+
+#ifdef CONFIG_PROC_FS
+
+static struct rif_cache_s *rif_get_idx(loff_t pos)
+{
+ int i;
+ struct rif_cache_s *entry;
+ loff_t off = 0;
+
+ for(i = 0; i < RIF_TABLE_SIZE; i++)
+ for(entry = rif_table[i]; entry; entry = entry->next) {
+ if (off == pos)
+ return entry;
+ ++off;
+ }
+
+ return NULL;
+}
+
+static void *rif_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ spin_lock_bh(&rif_lock);
+
+ return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN;
+}
+
+static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ int i;
+ struct rif_cache_s *ent = v;
+
+ ++*pos;
+
+ if (v == SEQ_START_TOKEN) {
+ i = -1;
+ goto scan;
+ }
+
+ if (ent->next)
+ return ent->next;
+
+ i = rif_hash(ent->addr);
+ scan:
+ while (++i < RIF_TABLE_SIZE) {
+ if ((ent = rif_table[i]) != NULL)
+ return ent;
+ }
+ return NULL;
+}
+
+static void rif_seq_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&rif_lock);
+}
+
+static int rif_seq_show(struct seq_file *seq, void *v)
+{
+ int j, rcf_len, segment, brdgnmb;
+ struct rif_cache_s *entry = v;
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq,
+ "if TR address TTL rcf routing segments\n");
+ else {
+ struct net_device *dev = dev_get_by_index(entry->iface);
+ long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout)
+ - (long) jiffies;
+
+ seq_printf(seq, "%s %02X:%02X:%02X:%02X:%02X:%02X %7li ",
+ dev?dev->name:"?",
+ entry->addr[0],entry->addr[1],entry->addr[2],
+ entry->addr[3],entry->addr[4],entry->addr[5],
+ ttl/HZ);
+
+ if (entry->local_ring)
+ seq_puts(seq, "local\n");
+ else {
+
+ seq_printf(seq, "%04X", ntohs(entry->rcf));
+ rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2;
+ if (rcf_len)
+ rcf_len >>= 1;
+ for(j = 1; j < rcf_len; j++) {
+ if(j==1) {
+ segment=ntohs(entry->rseg[j-1])>>4;
+ seq_printf(seq," %03X",segment);
+ };
+ segment=ntohs(entry->rseg[j])>>4;
+ brdgnmb=ntohs(entry->rseg[j-1])&0x00f;
+ seq_printf(seq,"-%01X-%03X",brdgnmb,segment);
+ }
+ seq_putc(seq, '\n');
+ }
+ }
+ return 0;
+}
+
+
+static struct seq_operations rif_seq_ops = {
+ .start = rif_seq_start,
+ .next = rif_seq_next,
+ .stop = rif_seq_stop,
+ .show = rif_seq_show,
+};
+
+static int rif_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &rif_seq_ops);
+}
+
+static struct file_operations rif_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = rif_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif
+
+static void tr_setup(struct net_device *dev)
+{
+ /*
+ * Configure and register
+ */
+
+ dev->hard_header = tr_header;
+ dev->rebuild_header = tr_rebuild_header;
+
+ dev->type = ARPHRD_IEEE802_TR;
+ dev->hard_header_len = TR_HLEN;
+ dev->mtu = 2000;
+ dev->addr_len = TR_ALEN;
+ dev->tx_queue_len = 100; /* Long queues on tr */
+
+ memset(dev->broadcast,0xFF, TR_ALEN);
+
+ /* New-style flags. */
+ dev->flags = IFF_BROADCAST | IFF_MULTICAST ;
+}
+
+/**
+ * alloc_trdev - Register token ring device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ * for this token ring device
+ *
+ * Fill in the fields of the device structure with token ring-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+struct net_device *alloc_trdev(int sizeof_priv)
+{
+ return alloc_netdev(sizeof_priv, "tr%d", tr_setup);
+}
+
+/*
+ * Called during bootup. We don't actually have to initialise
+ * too much for this.
+ */
+
+static int __init rif_init(void)
+{
+ init_timer(&rif_timer);
+ rif_timer.expires = sysctl_tr_rif_timeout;
+ rif_timer.data = 0L;
+ rif_timer.function = rif_check_expire;
+ add_timer(&rif_timer);
+
+ proc_net_fops_create("tr_rif", S_IRUGO, &rif_seq_fops);
+ return 0;
+}
+
+module_init(rif_init);
+
+EXPORT_SYMBOL(tr_source_route);
+EXPORT_SYMBOL(tr_type_trans);
+EXPORT_SYMBOL(alloc_trdev);