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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/802
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 000000000000..01861929591a
--- /dev/null
+++ b/net/802/Makefile
@@ -0,0 +1,15 @@
1#
2# Makefile for the Linux 802.x protocol layers.
3#
4
5obj-y := p8023.o
6
7# Check the p8022 selections against net/core/Makefile.
8obj-$(CONFIG_SYSCTL) += sysctl_net_802.o
9obj-$(CONFIG_LLC) += p8022.o psnap.o
10obj-$(CONFIG_TR) += p8022.o psnap.o tr.o sysctl_net_802.o
11obj-$(CONFIG_NET_FC) += fc.o
12obj-$(CONFIG_FDDI) += fddi.o
13obj-$(CONFIG_HIPPI) += hippi.o
14obj-$(CONFIG_IPX) += p8022.o psnap.o
15obj-$(CONFIG_ATALK) += p8022.o psnap.o
diff --git a/net/802/fc.c b/net/802/fc.c
new file mode 100644
index 000000000000..640d34e026c2
--- /dev/null
+++ b/net/802/fc.c
@@ -0,0 +1,130 @@
1/*
2 * NET3: Fibre Channel device handling subroutines
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Vineet Abraham <vma@iol.unh.edu>
10 * v 1.0 03/22/99
11 */
12
13#include <linux/config.h>
14#include <asm/uaccess.h>
15#include <asm/system.h>
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/sched.h>
19#include <linux/string.h>
20#include <linux/mm.h>
21#include <linux/socket.h>
22#include <linux/in.h>
23#include <linux/inet.h>
24#include <linux/netdevice.h>
25#include <linux/fcdevice.h>
26#include <linux/skbuff.h>
27#include <linux/errno.h>
28#include <linux/timer.h>
29#include <linux/net.h>
30#include <linux/proc_fs.h>
31#include <linux/init.h>
32#include <net/arp.h>
33
34/*
35 * Put the headers on a Fibre Channel packet.
36 */
37
38static int fc_header(struct sk_buff *skb, struct net_device *dev,
39 unsigned short type,
40 void *daddr, void *saddr, unsigned len)
41{
42 struct fch_hdr *fch;
43 int hdr_len;
44
45 /*
46 * Add the 802.2 SNAP header if IP as the IPv4 code calls
47 * dev->hard_header directly.
48 */
49 if (type == ETH_P_IP || type == ETH_P_ARP)
50 {
51 struct fcllc *fcllc;
52
53 hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);
54 fch = (struct fch_hdr *)skb_push(skb, hdr_len);
55 fcllc = (struct fcllc *)(fch+1);
56 fcllc->dsap = fcllc->ssap = EXTENDED_SAP;
57 fcllc->llc = UI_CMD;
58 fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;
59 fcllc->ethertype = htons(type);
60 }
61 else
62 {
63 hdr_len = sizeof(struct fch_hdr);
64 fch = (struct fch_hdr *)skb_push(skb, hdr_len);
65 }
66
67 if(saddr)
68 memcpy(fch->saddr,saddr,dev->addr_len);
69 else
70 memcpy(fch->saddr,dev->dev_addr,dev->addr_len);
71
72 if(daddr)
73 {
74 memcpy(fch->daddr,daddr,dev->addr_len);
75 return(hdr_len);
76 }
77 return -hdr_len;
78}
79
80/*
81 * A neighbour discovery of some species (eg arp) has completed. We
82 * can now send the packet.
83 */
84
85static int fc_rebuild_header(struct sk_buff *skb)
86{
87 struct fch_hdr *fch=(struct fch_hdr *)skb->data;
88 struct fcllc *fcllc=(struct fcllc *)(skb->data+sizeof(struct fch_hdr));
89 if(fcllc->ethertype != htons(ETH_P_IP)) {
90 printk("fc_rebuild_header: Don't know how to resolve type %04X addresses ?\n",(unsigned int)htons(fcllc->ethertype));
91 return 0;
92 }
93#ifdef CONFIG_INET
94 return arp_find(fch->daddr, skb);
95#else
96 return 0;
97#endif
98}
99
100static void fc_setup(struct net_device *dev)
101{
102 dev->hard_header = fc_header;
103 dev->rebuild_header = fc_rebuild_header;
104
105 dev->type = ARPHRD_IEEE802;
106 dev->hard_header_len = FC_HLEN;
107 dev->mtu = 2024;
108 dev->addr_len = FC_ALEN;
109 dev->tx_queue_len = 100; /* Long queues on fc */
110 dev->flags = IFF_BROADCAST;
111
112 memset(dev->broadcast, 0xFF, FC_ALEN);
113}
114
115/**
116 * alloc_fcdev - Register fibre channel device
117 * @sizeof_priv: Size of additional driver-private structure to be allocated
118 * for this fibre channel device
119 *
120 * Fill in the fields of the device structure with fibre channel-generic values.
121 *
122 * Constructs a new net device, complete with a private data area of
123 * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
124 * this private data area.
125 */
126struct net_device *alloc_fcdev(int sizeof_priv)
127{
128 return alloc_netdev(sizeof_priv, "fc%d", fc_setup);
129}
130EXPORT_SYMBOL(alloc_fcdev);
diff --git a/net/802/fddi.c b/net/802/fddi.c
new file mode 100644
index 000000000000..f9a31a9f70f1
--- /dev/null
+++ b/net/802/fddi.c
@@ -0,0 +1,210 @@
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * FDDI-type device handling.
7 *
8 * Version: @(#)fddi.c 1.0.0 08/12/96
9 *
10 * Authors: Lawrence V. Stefani, <stefani@lkg.dec.com>
11 *
12 * fddi.c is based on previous eth.c and tr.c work by
13 * Ross Biro, <bir7@leland.Stanford.Edu>
14 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
15 * Mark Evans, <evansmp@uhura.aston.ac.uk>
16 * Florian La Roche, <rzsfl@rz.uni-sb.de>
17 * Alan Cox, <gw4pts@gw4pts.ampr.org>
18 *
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License
21 * as published by the Free Software Foundation; either version
22 * 2 of the License, or (at your option) any later version.
23 *
24 * Changes
25 * Alan Cox : New arp/rebuild header
26 * Maciej W. Rozycki : IPv6 support
27 */
28
29#include <linux/config.h>
30#include <linux/module.h>
31#include <asm/system.h>
32#include <linux/types.h>
33#include <linux/kernel.h>
34#include <linux/sched.h>
35#include <linux/string.h>
36#include <linux/mm.h>
37#include <linux/socket.h>
38#include <linux/in.h>
39#include <linux/inet.h>
40#include <linux/netdevice.h>
41#include <linux/fddidevice.h>
42#include <linux/if_ether.h>
43#include <linux/skbuff.h>
44#include <linux/errno.h>
45#include <net/arp.h>
46#include <net/sock.h>
47
48/*
49 * Create the FDDI MAC header for an arbitrary protocol layer
50 *
51 * saddr=NULL means use device source address
52 * daddr=NULL means leave destination address (eg unresolved arp)
53 */
54
55static int fddi_header(struct sk_buff *skb, struct net_device *dev,
56 unsigned short type,
57 void *daddr, void *saddr, unsigned len)
58{
59 int hl = FDDI_K_SNAP_HLEN;
60 struct fddihdr *fddi;
61
62 if(type != ETH_P_IP && type != ETH_P_IPV6 && type != ETH_P_ARP)
63 hl=FDDI_K_8022_HLEN-3;
64 fddi = (struct fddihdr *)skb_push(skb, hl);
65 fddi->fc = FDDI_FC_K_ASYNC_LLC_DEF;
66 if(type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
67 {
68 fddi->hdr.llc_snap.dsap = FDDI_EXTENDED_SAP;
69 fddi->hdr.llc_snap.ssap = FDDI_EXTENDED_SAP;
70 fddi->hdr.llc_snap.ctrl = FDDI_UI_CMD;
71 fddi->hdr.llc_snap.oui[0] = 0x00;
72 fddi->hdr.llc_snap.oui[1] = 0x00;
73 fddi->hdr.llc_snap.oui[2] = 0x00;
74 fddi->hdr.llc_snap.ethertype = htons(type);
75 }
76
77 /* Set the source and destination hardware addresses */
78
79 if (saddr != NULL)
80 memcpy(fddi->saddr, saddr, dev->addr_len);
81 else
82 memcpy(fddi->saddr, dev->dev_addr, dev->addr_len);
83
84 if (daddr != NULL)
85 {
86 memcpy(fddi->daddr, daddr, dev->addr_len);
87 return(hl);
88 }
89
90 return(-hl);
91}
92
93
94/*
95 * Rebuild the FDDI MAC header. This is called after an ARP
96 * (or in future other address resolution) has completed on
97 * this sk_buff. We now let ARP fill in the other fields.
98 */
99
100static int fddi_rebuild_header(struct sk_buff *skb)
101{
102 struct fddihdr *fddi = (struct fddihdr *)skb->data;
103
104#ifdef CONFIG_INET
105 if (fddi->hdr.llc_snap.ethertype == __constant_htons(ETH_P_IP))
106 /* Try to get ARP to resolve the header and fill destination address */
107 return arp_find(fddi->daddr, skb);
108 else
109#endif
110 {
111 printk("%s: Don't know how to resolve type %02X addresses.\n",
112 skb->dev->name, htons(fddi->hdr.llc_snap.ethertype));
113 return(0);
114 }
115}
116
117
118/*
119 * Determine the packet's protocol ID and fill in skb fields.
120 * This routine is called before an incoming packet is passed
121 * up. It's used to fill in specific skb fields and to set
122 * the proper pointer to the start of packet data (skb->data).
123 */
124
125unsigned short fddi_type_trans(struct sk_buff *skb, struct net_device *dev)
126{
127 struct fddihdr *fddi = (struct fddihdr *)skb->data;
128 unsigned short type;
129
130 /*
131 * Set mac.raw field to point to FC byte, set data field to point
132 * to start of packet data. Assume 802.2 SNAP frames for now.
133 */
134
135 skb->mac.raw = skb->data; /* point to frame control (FC) */
136
137 if(fddi->hdr.llc_8022_1.dsap==0xe0)
138 {
139 skb_pull(skb, FDDI_K_8022_HLEN-3);
140 type = __constant_htons(ETH_P_802_2);
141 }
142 else
143 {
144 skb_pull(skb, FDDI_K_SNAP_HLEN); /* adjust for 21 byte header */
145 type=fddi->hdr.llc_snap.ethertype;
146 }
147
148 /* Set packet type based on destination address and flag settings */
149
150 if (*fddi->daddr & 0x01)
151 {
152 if (memcmp(fddi->daddr, dev->broadcast, FDDI_K_ALEN) == 0)
153 skb->pkt_type = PACKET_BROADCAST;
154 else
155 skb->pkt_type = PACKET_MULTICAST;
156 }
157
158 else if (dev->flags & IFF_PROMISC)
159 {
160 if (memcmp(fddi->daddr, dev->dev_addr, FDDI_K_ALEN))
161 skb->pkt_type = PACKET_OTHERHOST;
162 }
163
164 /* Assume 802.2 SNAP frames, for now */
165
166 return(type);
167}
168
169EXPORT_SYMBOL(fddi_type_trans);
170
171static int fddi_change_mtu(struct net_device *dev, int new_mtu)
172{
173 if ((new_mtu < FDDI_K_SNAP_HLEN) || (new_mtu > FDDI_K_SNAP_DLEN))
174 return(-EINVAL);
175 dev->mtu = new_mtu;
176 return(0);
177}
178
179static void fddi_setup(struct net_device *dev)
180{
181 dev->change_mtu = fddi_change_mtu;
182 dev->hard_header = fddi_header;
183 dev->rebuild_header = fddi_rebuild_header;
184
185 dev->type = ARPHRD_FDDI;
186 dev->hard_header_len = FDDI_K_SNAP_HLEN+3; /* Assume 802.2 SNAP hdr len + 3 pad bytes */
187 dev->mtu = FDDI_K_SNAP_DLEN; /* Assume max payload of 802.2 SNAP frame */
188 dev->addr_len = FDDI_K_ALEN;
189 dev->tx_queue_len = 100; /* Long queues on FDDI */
190 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
191
192 memset(dev->broadcast, 0xFF, FDDI_K_ALEN);
193}
194
195/**
196 * alloc_fddidev - Register FDDI device
197 * @sizeof_priv: Size of additional driver-private structure to be allocated
198 * for this FDDI device
199 *
200 * Fill in the fields of the device structure with FDDI-generic values.
201 *
202 * Constructs a new net device, complete with a private data area of
203 * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
204 * this private data area.
205 */
206struct net_device *alloc_fddidev(int sizeof_priv)
207{
208 return alloc_netdev(sizeof_priv, "fddi%d", fddi_setup);
209}
210EXPORT_SYMBOL(alloc_fddidev);
diff --git a/net/802/hippi.c b/net/802/hippi.c
new file mode 100644
index 000000000000..4eb135c0afbb
--- /dev/null
+++ b/net/802/hippi.c
@@ -0,0 +1,234 @@
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * HIPPI-type device handling.
7 *
8 * Version: @(#)hippi.c 1.0.0 05/29/97
9 *
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Mark Evans, <evansmp@uhura.aston.ac.uk>
13 * Florian La Roche, <rzsfl@rz.uni-sb.de>
14 * Alan Cox, <gw4pts@gw4pts.ampr.org>
15 * Jes Sorensen, <Jes.Sorensen@cern.ch>
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 */
22
23#include <linux/module.h>
24#include <linux/types.h>
25#include <linux/kernel.h>
26#include <linux/sched.h>
27#include <linux/string.h>
28#include <linux/mm.h>
29#include <linux/socket.h>
30#include <linux/in.h>
31#include <linux/inet.h>
32#include <linux/netdevice.h>
33#include <linux/hippidevice.h>
34#include <linux/skbuff.h>
35#include <linux/errno.h>
36#include <net/arp.h>
37#include <net/sock.h>
38#include <asm/uaccess.h>
39#include <asm/checksum.h>
40#include <asm/system.h>
41
42/*
43 * Create the HIPPI MAC header for an arbitrary protocol layer
44 *
45 * saddr=NULL means use device source address
46 * daddr=NULL means leave destination address (eg unresolved arp)
47 */
48
49static int hippi_header(struct sk_buff *skb, struct net_device *dev,
50 unsigned short type, void *daddr, void *saddr,
51 unsigned len)
52{
53 struct hippi_hdr *hip = (struct hippi_hdr *)skb_push(skb, HIPPI_HLEN);
54
55 if (!len){
56 len = skb->len - HIPPI_HLEN;
57 printk("hippi_header(): length not supplied\n");
58 }
59
60 /*
61 * Due to the stupidity of the little endian byte-order we
62 * have to set the fp field this way.
63 */
64 hip->fp.fixed = __constant_htonl(0x04800018);
65 hip->fp.d2_size = htonl(len + 8);
66 hip->le.fc = 0;
67 hip->le.double_wide = 0; /* only HIPPI 800 for the time being */
68 hip->le.message_type = 0; /* Data PDU */
69
70 hip->le.dest_addr_type = 2; /* 12 bit SC address */
71 hip->le.src_addr_type = 2; /* 12 bit SC address */
72
73 memcpy(hip->le.src_switch_addr, dev->dev_addr + 3, 3);
74 memset(&hip->le.reserved, 0, 16);
75
76 hip->snap.dsap = HIPPI_EXTENDED_SAP;
77 hip->snap.ssap = HIPPI_EXTENDED_SAP;
78 hip->snap.ctrl = HIPPI_UI_CMD;
79 hip->snap.oui[0] = 0x00;
80 hip->snap.oui[1] = 0x00;
81 hip->snap.oui[2] = 0x00;
82 hip->snap.ethertype = htons(type);
83
84 if (daddr)
85 {
86 memcpy(hip->le.dest_switch_addr, daddr + 3, 3);
87 memcpy(&skb->private.ifield, daddr + 2, 4);
88 return HIPPI_HLEN;
89 }
90 return -((int)HIPPI_HLEN);
91}
92
93
94/*
95 * Rebuild the HIPPI MAC header. This is called after an ARP has
96 * completed on this sk_buff. We now let ARP fill in the other fields.
97 */
98
99static int hippi_rebuild_header(struct sk_buff *skb)
100{
101 struct hippi_hdr *hip = (struct hippi_hdr *)skb->data;
102
103 /*
104 * Only IP is currently supported
105 */
106
107 if(hip->snap.ethertype != __constant_htons(ETH_P_IP))
108 {
109 printk(KERN_DEBUG "%s: unable to resolve type %X addresses.\n",skb->dev->name,ntohs(hip->snap.ethertype));
110 return 0;
111 }
112
113 /*
114 * We don't support dynamic ARP on HIPPI, but we use the ARP
115 * static ARP tables to hold the I-FIELDs.
116 */
117 return arp_find(hip->le.daddr, skb);
118}
119
120
121/*
122 * Determine the packet's protocol ID.
123 */
124
125unsigned short hippi_type_trans(struct sk_buff *skb, struct net_device *dev)
126{
127 struct hippi_hdr *hip;
128
129 hip = (struct hippi_hdr *) skb->data;
130
131 /*
132 * This is actually wrong ... question is if we really should
133 * set the raw address here.
134 */
135 skb->mac.raw = skb->data;
136 skb_pull(skb, HIPPI_HLEN);
137
138 /*
139 * No fancy promisc stuff here now.
140 */
141
142 return hip->snap.ethertype;
143}
144
145EXPORT_SYMBOL(hippi_type_trans);
146
147static int hippi_change_mtu(struct net_device *dev, int new_mtu)
148{
149 /*
150 * HIPPI's got these nice large MTUs.
151 */
152 if ((new_mtu < 68) || (new_mtu > 65280))
153 return -EINVAL;
154 dev->mtu = new_mtu;
155 return(0);
156}
157
158/*
159 * For HIPPI we will actually use the lower 4 bytes of the hardware
160 * address as the I-FIELD rather than the actual hardware address.
161 */
162static int hippi_mac_addr(struct net_device *dev, void *p)
163{
164 struct sockaddr *addr = p;
165 if (netif_running(dev))
166 return -EBUSY;
167 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
168 return 0;
169}
170
171static int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
172{
173 /* Never send broadcast/multicast ARP messages */
174 p->mcast_probes = 0;
175
176 /* In IPv6 unicast probes are valid even on NBMA,
177 * because they are encapsulated in normal IPv6 protocol.
178 * Should be a generic flag.
179 */
180 if (p->tbl->family != AF_INET6)
181 p->ucast_probes = 0;
182 return 0;
183}
184
185static void hippi_setup(struct net_device *dev)
186{
187 dev->set_multicast_list = NULL;
188 dev->change_mtu = hippi_change_mtu;
189 dev->hard_header = hippi_header;
190 dev->rebuild_header = hippi_rebuild_header;
191 dev->set_mac_address = hippi_mac_addr;
192 dev->hard_header_parse = NULL;
193 dev->hard_header_cache = NULL;
194 dev->header_cache_update = NULL;
195 dev->neigh_setup = hippi_neigh_setup_dev;
196
197 /*
198 * We don't support HIPPI `ARP' for the time being, and probably
199 * never will unless someone else implements it. However we
200 * still need a fake ARPHRD to make ifconfig and friends play ball.
201 */
202 dev->type = ARPHRD_HIPPI;
203 dev->hard_header_len = HIPPI_HLEN;
204 dev->mtu = 65280;
205 dev->addr_len = HIPPI_ALEN;
206 dev->tx_queue_len = 25 /* 5 */;
207 memset(dev->broadcast, 0xFF, HIPPI_ALEN);
208
209
210 /*
211 * HIPPI doesn't support broadcast+multicast and we only use
212 * static ARP tables. ARP is disabled by hippi_neigh_setup_dev.
213 */
214 dev->flags = 0;
215}
216
217/**
218 * alloc_hippi_dev - Register HIPPI device
219 * @sizeof_priv: Size of additional driver-private structure to be allocated
220 * for this HIPPI device
221 *
222 * Fill in the fields of the device structure with HIPPI-generic values.
223 *
224 * Constructs a new net device, complete with a private data area of
225 * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
226 * this private data area.
227 */
228
229struct net_device *alloc_hippi_dev(int sizeof_priv)
230{
231 return alloc_netdev(sizeof_priv, "hip%d", hippi_setup);
232}
233
234EXPORT_SYMBOL(alloc_hippi_dev);
diff --git a/net/802/p8022.c b/net/802/p8022.c
new file mode 100644
index 000000000000..5ae63416df6d
--- /dev/null
+++ b/net/802/p8022.c
@@ -0,0 +1,65 @@
1/*
2 * NET3: Support for 802.2 demultiplexing off Ethernet (Token ring
3 * is kept separate see p8022tr.c)
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Demultiplex 802.2 encoded protocols. We match the entry by the
10 * SSAP/DSAP pair and then deliver to the registered datalink that
11 * matches. The control byte is ignored and handling of such items
12 * is up to the routine passed the frame.
13 *
14 * Unlike the 802.3 datalink we have a list of 802.2 entries as
15 * there are multiple protocols to demux. The list is currently
16 * short (3 or 4 entries at most). The current demux assumes this.
17 */
18#include <linux/module.h>
19#include <linux/netdevice.h>
20#include <linux/skbuff.h>
21#include <net/datalink.h>
22#include <linux/mm.h>
23#include <linux/in.h>
24#include <linux/init.h>
25#include <net/llc.h>
26#include <net/p8022.h>
27
28static int p8022_request(struct datalink_proto *dl, struct sk_buff *skb,
29 unsigned char *dest)
30{
31 llc_build_and_send_ui_pkt(dl->sap, skb, dest, dl->sap->laddr.lsap);
32 return 0;
33}
34
35struct datalink_proto *register_8022_client(unsigned char type,
36 int (*func)(struct sk_buff *skb,
37 struct net_device *dev,
38 struct packet_type *pt))
39{
40 struct datalink_proto *proto;
41
42 proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
43 if (proto) {
44 proto->type[0] = type;
45 proto->header_length = 3;
46 proto->request = p8022_request;
47 proto->sap = llc_sap_open(type, func);
48 if (!proto->sap) {
49 kfree(proto);
50 proto = NULL;
51 }
52 }
53 return proto;
54}
55
56void unregister_8022_client(struct datalink_proto *proto)
57{
58 llc_sap_close(proto->sap);
59 kfree(proto);
60}
61
62EXPORT_SYMBOL(register_8022_client);
63EXPORT_SYMBOL(unregister_8022_client);
64
65MODULE_LICENSE("GPL");
diff --git a/net/802/p8023.c b/net/802/p8023.c
new file mode 100644
index 000000000000..a0b61b40225f
--- /dev/null
+++ b/net/802/p8023.c
@@ -0,0 +1,61 @@
1/*
2 * NET3: 802.3 data link hooks used for IPX 802.3
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * 802.3 isn't really a protocol data link layer. Some old IPX stuff
10 * uses it however. Note that there is only one 802.3 protocol layer
11 * in the system. We don't currently support different protocols
12 * running raw 802.3 on different devices. Thankfully nobody else
13 * has done anything like the old IPX.
14 */
15
16#include <linux/in.h>
17#include <linux/mm.h>
18#include <linux/module.h>
19#include <linux/netdevice.h>
20#include <linux/skbuff.h>
21
22#include <net/datalink.h>
23
24/*
25 * Place an 802.3 header on a packet. The driver will do the mac
26 * addresses, we just need to give it the buffer length.
27 */
28static int p8023_request(struct datalink_proto *dl,
29 struct sk_buff *skb, unsigned char *dest_node)
30{
31 struct net_device *dev = skb->dev;
32
33 dev->hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
34 return dev_queue_xmit(skb);
35}
36
37/*
38 * Create an 802.3 client. Note there can be only one 802.3 client
39 */
40struct datalink_proto *make_8023_client(void)
41{
42 struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
43
44 if (proto) {
45 proto->header_length = 0;
46 proto->request = p8023_request;
47 }
48 return proto;
49}
50
51/*
52 * Destroy the 802.3 client.
53 */
54void destroy_8023_client(struct datalink_proto *dl)
55{
56 if (dl)
57 kfree(dl);
58}
59
60EXPORT_SYMBOL(destroy_8023_client);
61EXPORT_SYMBOL(make_8023_client);
diff --git a/net/802/psnap.c b/net/802/psnap.c
new file mode 100644
index 000000000000..1053821ddf93
--- /dev/null
+++ b/net/802/psnap.c
@@ -0,0 +1,159 @@
1/*
2 * SNAP data link layer. Derived from 802.2
3 *
4 * Alan Cox <Alan.Cox@linux.org>,
5 * from the 802.2 layer by Greg Page.
6 * Merged in additions from Greg Page's psnap.c.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
14#include <linux/module.h>
15#include <linux/netdevice.h>
16#include <linux/skbuff.h>
17#include <net/datalink.h>
18#include <net/llc.h>
19#include <net/psnap.h>
20#include <linux/mm.h>
21#include <linux/in.h>
22#include <linux/init.h>
23
24static LIST_HEAD(snap_list);
25static DEFINE_SPINLOCK(snap_lock);
26static struct llc_sap *snap_sap;
27
28/*
29 * Find a snap client by matching the 5 bytes.
30 */
31static struct datalink_proto *find_snap_client(unsigned char *desc)
32{
33 struct list_head *entry;
34 struct datalink_proto *proto = NULL, *p;
35
36 list_for_each_rcu(entry, &snap_list) {
37 p = list_entry(entry, struct datalink_proto, node);
38 if (!memcmp(p->type, desc, 5)) {
39 proto = p;
40 break;
41 }
42 }
43 return proto;
44}
45
46/*
47 * A SNAP packet has arrived
48 */
49static int snap_rcv(struct sk_buff *skb, struct net_device *dev,
50 struct packet_type *pt)
51{
52 int rc = 1;
53 struct datalink_proto *proto;
54 static struct packet_type snap_packet_type = {
55 .type = __constant_htons(ETH_P_SNAP),
56 };
57
58 rcu_read_lock();
59 proto = find_snap_client(skb->h.raw);
60 if (proto) {
61 /* Pass the frame on. */
62 skb->h.raw += 5;
63 skb_pull(skb, 5);
64 rc = proto->rcvfunc(skb, dev, &snap_packet_type);
65 } else {
66 skb->sk = NULL;
67 kfree_skb(skb);
68 rc = 1;
69 }
70
71 rcu_read_unlock();
72 return rc;
73}
74
75/*
76 * Put a SNAP header on a frame and pass to 802.2
77 */
78static int snap_request(struct datalink_proto *dl,
79 struct sk_buff *skb, u8 *dest)
80{
81 memcpy(skb_push(skb, 5), dl->type, 5);
82 llc_build_and_send_ui_pkt(snap_sap, skb, dest, snap_sap->laddr.lsap);
83 return 0;
84}
85
86/*
87 * Set up the SNAP layer
88 */
89EXPORT_SYMBOL(register_snap_client);
90EXPORT_SYMBOL(unregister_snap_client);
91
92static char snap_err_msg[] __initdata =
93 KERN_CRIT "SNAP - unable to register with 802.2\n";
94
95static int __init snap_init(void)
96{
97 snap_sap = llc_sap_open(0xAA, snap_rcv);
98
99 if (!snap_sap)
100 printk(snap_err_msg);
101
102 return 0;
103}
104
105module_init(snap_init);
106
107static void __exit snap_exit(void)
108{
109 llc_sap_close(snap_sap);
110}
111
112module_exit(snap_exit);
113
114
115/*
116 * Register SNAP clients. We don't yet use this for IP.
117 */
118struct datalink_proto *register_snap_client(unsigned char *desc,
119 int (*rcvfunc)(struct sk_buff *,
120 struct net_device *,
121 struct packet_type *))
122{
123 struct datalink_proto *proto = NULL;
124
125 spin_lock_bh(&snap_lock);
126
127 if (find_snap_client(desc))
128 goto out;
129
130 proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
131 if (proto) {
132 memcpy(proto->type, desc,5);
133 proto->rcvfunc = rcvfunc;
134 proto->header_length = 5 + 3; /* snap + 802.2 */
135 proto->request = snap_request;
136 list_add_rcu(&proto->node, &snap_list);
137 }
138out:
139 spin_unlock_bh(&snap_lock);
140
141 synchronize_net();
142 return proto;
143}
144
145/*
146 * Unregister SNAP clients. Protocols no longer want to play with us ...
147 */
148void unregister_snap_client(struct datalink_proto *proto)
149{
150 spin_lock_bh(&snap_lock);
151 list_del_rcu(&proto->node);
152 spin_unlock_bh(&snap_lock);
153
154 synchronize_net();
155
156 kfree(proto);
157}
158
159MODULE_LICENSE("GPL");
diff --git a/net/802/sysctl_net_802.c b/net/802/sysctl_net_802.c
new file mode 100644
index 000000000000..36079630c49f
--- /dev/null
+++ b/net/802/sysctl_net_802.c
@@ -0,0 +1,33 @@
1/* -*- linux-c -*-
2 * sysctl_net_802.c: sysctl interface to net 802 subsystem.
3 *
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/802 directory entry (empty =) ). [MS]
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#include <linux/mm.h>
14#include <linux/sysctl.h>
15#include <linux/config.h>
16
17#ifdef CONFIG_TR
18extern int sysctl_tr_rif_timeout;
19#endif
20
21struct ctl_table tr_table[] = {
22#ifdef CONFIG_TR
23 {
24 .ctl_name = NET_TR_RIF_TIMEOUT,
25 .procname = "rif_timeout",
26 .data = &sysctl_tr_rif_timeout,
27 .maxlen = sizeof(int),
28 .mode = 0644,
29 .proc_handler = &proc_dointvec
30 },
31#endif /* CONFIG_TR */
32 { 0 },
33};
diff --git a/net/802/tr.c b/net/802/tr.c
new file mode 100644
index 000000000000..85293ccf7efc
--- /dev/null
+++ b/net/802/tr.c
@@ -0,0 +1,645 @@
1/*
2 * NET3: Token ring device handling subroutines
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Fixes: 3 Feb 97 Paul Norton <pnorton@cts.com> Minor routing fixes.
10 * Added rif table to /proc/net/tr_rif and rif timeout to
11 * /proc/sys/net/token-ring/rif_timeout.
12 * 22 Jun 98 Paul Norton <p.norton@computer.org> Rearranged
13 * tr_header and tr_type_trans to handle passing IPX SNAP and
14 * 802.2 through the correct layers. Eliminated tr_reformat.
15 *
16 */
17
18#include <asm/uaccess.h>
19#include <asm/system.h>
20#include <linux/config.h>
21#include <linux/module.h>
22#include <linux/types.h>
23#include <linux/kernel.h>
24#include <linux/jiffies.h>
25#include <linux/string.h>
26#include <linux/mm.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/inet.h>
30#include <linux/netdevice.h>
31#include <linux/trdevice.h>
32#include <linux/skbuff.h>
33#include <linux/errno.h>
34#include <linux/timer.h>
35#include <linux/net.h>
36#include <linux/proc_fs.h>
37#include <linux/seq_file.h>
38#include <linux/init.h>
39#include <net/arp.h>
40
41static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev);
42static void rif_check_expire(unsigned long dummy);
43
44#define TR_SR_DEBUG 0
45
46/*
47 * Each RIF entry we learn is kept this way
48 */
49
50struct rif_cache_s {
51 unsigned char addr[TR_ALEN];
52 int iface;
53 __u16 rcf;
54 __u16 rseg[8];
55 struct rif_cache_s *next;
56 unsigned long last_used;
57 unsigned char local_ring;
58};
59
60#define RIF_TABLE_SIZE 32
61
62/*
63 * We hash the RIF cache 32 ways. We do after all have to look it
64 * up a lot.
65 */
66
67static struct rif_cache_s *rif_table[RIF_TABLE_SIZE];
68
69static DEFINE_SPINLOCK(rif_lock);
70
71
72/*
73 * Garbage disposal timer.
74 */
75
76static struct timer_list rif_timer;
77
78int sysctl_tr_rif_timeout = 60*10*HZ;
79
80static inline unsigned long rif_hash(const unsigned char *addr)
81{
82 unsigned long x;
83
84 x = addr[0];
85 x = (x << 2) ^ addr[1];
86 x = (x << 2) ^ addr[2];
87 x = (x << 2) ^ addr[3];
88 x = (x << 2) ^ addr[4];
89 x = (x << 2) ^ addr[5];
90
91 x ^= x >> 8;
92
93 return x & (RIF_TABLE_SIZE - 1);
94}
95
96/*
97 * Put the headers on a token ring packet. Token ring source routing
98 * makes this a little more exciting than on ethernet.
99 */
100
101static int tr_header(struct sk_buff *skb, struct net_device *dev,
102 unsigned short type,
103 void *daddr, void *saddr, unsigned len)
104{
105 struct trh_hdr *trh;
106 int hdr_len;
107
108 /*
109 * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls
110 * dev->hard_header directly.
111 */
112 if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
113 {
114 struct trllc *trllc;
115
116 hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc);
117 trh = (struct trh_hdr *)skb_push(skb, hdr_len);
118 trllc = (struct trllc *)(trh+1);
119 trllc->dsap = trllc->ssap = EXTENDED_SAP;
120 trllc->llc = UI_CMD;
121 trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00;
122 trllc->ethertype = htons(type);
123 }
124 else
125 {
126 hdr_len = sizeof(struct trh_hdr);
127 trh = (struct trh_hdr *)skb_push(skb, hdr_len);
128 }
129
130 trh->ac=AC;
131 trh->fc=LLC_FRAME;
132
133 if(saddr)
134 memcpy(trh->saddr,saddr,dev->addr_len);
135 else
136 memcpy(trh->saddr,dev->dev_addr,dev->addr_len);
137
138 /*
139 * Build the destination and then source route the frame
140 */
141
142 if(daddr)
143 {
144 memcpy(trh->daddr,daddr,dev->addr_len);
145 tr_source_route(skb,trh,dev);
146 return(hdr_len);
147 }
148
149 return -hdr_len;
150}
151
152/*
153 * A neighbour discovery of some species (eg arp) has completed. We
154 * can now send the packet.
155 */
156
157static int tr_rebuild_header(struct sk_buff *skb)
158{
159 struct trh_hdr *trh=(struct trh_hdr *)skb->data;
160 struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr));
161 struct net_device *dev = skb->dev;
162
163 /*
164 * FIXME: We don't yet support IPv6 over token rings
165 */
166
167 if(trllc->ethertype != htons(ETH_P_IP)) {
168 printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n",(unsigned int)htons(trllc->ethertype));
169 return 0;
170 }
171
172#ifdef CONFIG_INET
173 if(arp_find(trh->daddr, skb)) {
174 return 1;
175 }
176 else
177#endif
178 {
179 tr_source_route(skb,trh,dev);
180 return 0;
181 }
182}
183
184/*
185 * Some of this is a bit hackish. We intercept RIF information
186 * used for source routing. We also grab IP directly and don't feed
187 * it via SNAP.
188 */
189
190unsigned short tr_type_trans(struct sk_buff *skb, struct net_device *dev)
191{
192
193 struct trh_hdr *trh=(struct trh_hdr *)skb->data;
194 struct trllc *trllc;
195 unsigned riflen=0;
196
197 skb->mac.raw = skb->data;
198
199 if(trh->saddr[0] & TR_RII)
200 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
201
202 trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
203
204 skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
205
206 if(*trh->daddr & 0x80)
207 {
208 if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN))
209 skb->pkt_type=PACKET_BROADCAST;
210 else
211 skb->pkt_type=PACKET_MULTICAST;
212 }
213 else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E))
214 {
215 skb->pkt_type=PACKET_MULTICAST;
216 }
217 else if(dev->flags & IFF_PROMISC)
218 {
219 if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN))
220 skb->pkt_type=PACKET_OTHERHOST;
221 }
222
223 if ((skb->pkt_type != PACKET_BROADCAST) &&
224 (skb->pkt_type != PACKET_MULTICAST))
225 tr_add_rif_info(trh,dev) ;
226
227 /*
228 * Strip the SNAP header from ARP packets since we don't
229 * pass them through to the 802.2/SNAP layers.
230 */
231
232 if (trllc->dsap == EXTENDED_SAP &&
233 (trllc->ethertype == ntohs(ETH_P_IP) ||
234 trllc->ethertype == ntohs(ETH_P_IPV6) ||
235 trllc->ethertype == ntohs(ETH_P_ARP)))
236 {
237 skb_pull(skb, sizeof(struct trllc));
238 return trllc->ethertype;
239 }
240
241 return ntohs(ETH_P_802_2);
242}
243
244/*
245 * We try to do source routing...
246 */
247
248void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev)
249{
250 int slack;
251 unsigned int hash;
252 struct rif_cache_s *entry;
253 unsigned char *olddata;
254 static const unsigned char mcast_func_addr[]
255 = {0xC0,0x00,0x00,0x04,0x00,0x00};
256
257 spin_lock_bh(&rif_lock);
258
259 /*
260 * Broadcasts are single route as stated in RFC 1042
261 */
262 if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) ||
263 (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) )
264 {
265 trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
266 | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
267 trh->saddr[0]|=TR_RII;
268 }
269 else
270 {
271 hash = rif_hash(trh->daddr);
272 /*
273 * Walk the hash table and look for an entry
274 */
275 for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next);
276
277 /*
278 * If we found an entry we can route the frame.
279 */
280 if(entry)
281 {
282#if TR_SR_DEBUG
283printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0],
284 trh->daddr[1],trh->daddr[2],trh->daddr[3],trh->daddr[4],trh->daddr[5]);
285#endif
286 if(!entry->local_ring && (ntohs(entry->rcf) & TR_RCF_LEN_MASK) >> 8)
287 {
288 trh->rcf=entry->rcf;
289 memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short));
290 trh->rcf^=htons(TR_RCF_DIR_BIT);
291 trh->rcf&=htons(0x1fff); /* Issam Chehab <ichehab@madge1.demon.co.uk> */
292
293 trh->saddr[0]|=TR_RII;
294#if TR_SR_DEBUG
295 printk("entry found with rcf %04x\n", entry->rcf);
296 }
297 else
298 {
299 printk("entry found but without rcf length, local=%02x\n", entry->local_ring);
300#endif
301 }
302 entry->last_used=jiffies;
303 }
304 else
305 {
306 /*
307 * Without the information we simply have to shout
308 * on the wire. The replies should rapidly clean this
309 * situation up.
310 */
311 trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
312 | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
313 trh->saddr[0]|=TR_RII;
314#if TR_SR_DEBUG
315 printk("no entry in rif table found - broadcasting frame\n");
316#endif
317 }
318 }
319
320 /* Compress the RIF here so we don't have to do it in the driver(s) */
321 if (!(trh->saddr[0] & 0x80))
322 slack = 18;
323 else
324 slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8);
325 olddata = skb->data;
326 spin_unlock_bh(&rif_lock);
327
328 skb_pull(skb, slack);
329 memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack);
330}
331
332/*
333 * We have learned some new RIF information for our source
334 * routing.
335 */
336
337static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev)
338{
339 unsigned int hash, rii_p = 0;
340 struct rif_cache_s *entry;
341
342
343 spin_lock_bh(&rif_lock);
344
345 /*
346 * Firstly see if the entry exists
347 */
348
349 if(trh->saddr[0] & TR_RII)
350 {
351 trh->saddr[0]&=0x7f;
352 if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2)
353 {
354 rii_p = 1;
355 }
356 }
357
358 hash = rif_hash(trh->saddr);
359 for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next);
360
361 if(entry==NULL)
362 {
363#if TR_SR_DEBUG
364printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n",
365 trh->saddr[0],trh->saddr[1],trh->saddr[2],
366 trh->saddr[3],trh->saddr[4],trh->saddr[5],
367 ntohs(trh->rcf));
368#endif
369 /*
370 * Allocate our new entry. A failure to allocate loses
371 * use the information. This is harmless.
372 *
373 * FIXME: We ought to keep some kind of cache size
374 * limiting and adjust the timers to suit.
375 */
376 entry=kmalloc(sizeof(struct rif_cache_s),GFP_ATOMIC);
377
378 if(!entry)
379 {
380 printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n");
381 spin_unlock_bh(&rif_lock);
382 return;
383 }
384
385 memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);
386 entry->iface = dev->ifindex;
387 entry->next=rif_table[hash];
388 entry->last_used=jiffies;
389 rif_table[hash]=entry;
390
391 if (rii_p)
392 {
393 entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
394 memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
395 entry->local_ring = 0;
396 trh->saddr[0]|=TR_RII; /* put the routing indicator back for tcpdump */
397 }
398 else
399 {
400 entry->local_ring = 1;
401 }
402 }
403 else /* Y. Tahara added */
404 {
405 /*
406 * Update existing entries
407 */
408 if (!entry->local_ring)
409 if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) &&
410 !(trh->rcf & htons(TR_RCF_BROADCAST_MASK)))
411 {
412#if TR_SR_DEBUG
413printk("updating rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n",
414 trh->saddr[0],trh->saddr[1],trh->saddr[2],
415 trh->saddr[3],trh->saddr[4],trh->saddr[5],
416 ntohs(trh->rcf));
417#endif
418 entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
419 memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
420 }
421 entry->last_used=jiffies;
422 }
423 spin_unlock_bh(&rif_lock);
424}
425
426/*
427 * Scan the cache with a timer and see what we need to throw out.
428 */
429
430static void rif_check_expire(unsigned long dummy)
431{
432 int i;
433 unsigned long next_interval = jiffies + sysctl_tr_rif_timeout/2;
434
435 spin_lock_bh(&rif_lock);
436
437 for(i =0; i < RIF_TABLE_SIZE; i++) {
438 struct rif_cache_s *entry, **pentry;
439
440 pentry = rif_table+i;
441 while((entry=*pentry) != NULL) {
442 unsigned long expires
443 = entry->last_used + sysctl_tr_rif_timeout;
444
445 if (time_before_eq(expires, jiffies)) {
446 *pentry = entry->next;
447 kfree(entry);
448 } else {
449 pentry = &entry->next;
450
451 if (time_before(expires, next_interval))
452 next_interval = expires;
453 }
454 }
455 }
456
457 spin_unlock_bh(&rif_lock);
458
459 mod_timer(&rif_timer, next_interval);
460
461}
462
463/*
464 * Generate the /proc/net information for the token ring RIF
465 * routing.
466 */
467
468#ifdef CONFIG_PROC_FS
469
470static struct rif_cache_s *rif_get_idx(loff_t pos)
471{
472 int i;
473 struct rif_cache_s *entry;
474 loff_t off = 0;
475
476 for(i = 0; i < RIF_TABLE_SIZE; i++)
477 for(entry = rif_table[i]; entry; entry = entry->next) {
478 if (off == pos)
479 return entry;
480 ++off;
481 }
482
483 return NULL;
484}
485
486static void *rif_seq_start(struct seq_file *seq, loff_t *pos)
487{
488 spin_lock_bh(&rif_lock);
489
490 return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN;
491}
492
493static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
494{
495 int i;
496 struct rif_cache_s *ent = v;
497
498 ++*pos;
499
500 if (v == SEQ_START_TOKEN) {
501 i = -1;
502 goto scan;
503 }
504
505 if (ent->next)
506 return ent->next;
507
508 i = rif_hash(ent->addr);
509 scan:
510 while (++i < RIF_TABLE_SIZE) {
511 if ((ent = rif_table[i]) != NULL)
512 return ent;
513 }
514 return NULL;
515}
516
517static void rif_seq_stop(struct seq_file *seq, void *v)
518{
519 spin_unlock_bh(&rif_lock);
520}
521
522static int rif_seq_show(struct seq_file *seq, void *v)
523{
524 int j, rcf_len, segment, brdgnmb;
525 struct rif_cache_s *entry = v;
526
527 if (v == SEQ_START_TOKEN)
528 seq_puts(seq,
529 "if TR address TTL rcf routing segments\n");
530 else {
531 struct net_device *dev = dev_get_by_index(entry->iface);
532 long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout)
533 - (long) jiffies;
534
535 seq_printf(seq, "%s %02X:%02X:%02X:%02X:%02X:%02X %7li ",
536 dev?dev->name:"?",
537 entry->addr[0],entry->addr[1],entry->addr[2],
538 entry->addr[3],entry->addr[4],entry->addr[5],
539 ttl/HZ);
540
541 if (entry->local_ring)
542 seq_puts(seq, "local\n");
543 else {
544
545 seq_printf(seq, "%04X", ntohs(entry->rcf));
546 rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2;
547 if (rcf_len)
548 rcf_len >>= 1;
549 for(j = 1; j < rcf_len; j++) {
550 if(j==1) {
551 segment=ntohs(entry->rseg[j-1])>>4;
552 seq_printf(seq," %03X",segment);
553 };
554 segment=ntohs(entry->rseg[j])>>4;
555 brdgnmb=ntohs(entry->rseg[j-1])&0x00f;
556 seq_printf(seq,"-%01X-%03X",brdgnmb,segment);
557 }
558 seq_putc(seq, '\n');
559 }
560 }
561 return 0;
562}
563
564
565static struct seq_operations rif_seq_ops = {
566 .start = rif_seq_start,
567 .next = rif_seq_next,
568 .stop = rif_seq_stop,
569 .show = rif_seq_show,
570};
571
572static int rif_seq_open(struct inode *inode, struct file *file)
573{
574 return seq_open(file, &rif_seq_ops);
575}
576
577static struct file_operations rif_seq_fops = {
578 .owner = THIS_MODULE,
579 .open = rif_seq_open,
580 .read = seq_read,
581 .llseek = seq_lseek,
582 .release = seq_release,
583};
584
585#endif
586
587static void tr_setup(struct net_device *dev)
588{
589 /*
590 * Configure and register
591 */
592
593 dev->hard_header = tr_header;
594 dev->rebuild_header = tr_rebuild_header;
595
596 dev->type = ARPHRD_IEEE802_TR;
597 dev->hard_header_len = TR_HLEN;
598 dev->mtu = 2000;
599 dev->addr_len = TR_ALEN;
600 dev->tx_queue_len = 100; /* Long queues on tr */
601
602 memset(dev->broadcast,0xFF, TR_ALEN);
603
604 /* New-style flags. */
605 dev->flags = IFF_BROADCAST | IFF_MULTICAST ;
606}
607
608/**
609 * alloc_trdev - Register token ring device
610 * @sizeof_priv: Size of additional driver-private structure to be allocated
611 * for this token ring device
612 *
613 * Fill in the fields of the device structure with token ring-generic values.
614 *
615 * Constructs a new net device, complete with a private data area of
616 * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
617 * this private data area.
618 */
619struct net_device *alloc_trdev(int sizeof_priv)
620{
621 return alloc_netdev(sizeof_priv, "tr%d", tr_setup);
622}
623
624/*
625 * Called during bootup. We don't actually have to initialise
626 * too much for this.
627 */
628
629static int __init rif_init(void)
630{
631 init_timer(&rif_timer);
632 rif_timer.expires = sysctl_tr_rif_timeout;
633 rif_timer.data = 0L;
634 rif_timer.function = rif_check_expire;
635 add_timer(&rif_timer);
636
637 proc_net_fops_create("tr_rif", S_IRUGO, &rif_seq_fops);
638 return 0;
639}
640
641module_init(rif_init);
642
643EXPORT_SYMBOL(tr_source_route);
644EXPORT_SYMBOL(tr_type_trans);
645EXPORT_SYMBOL(alloc_trdev);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-08 04:43:42 -0500