2 * DECnet An implementation of the DECnet protocol suite for the LINUX
3 * operating system. DECnet is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
8 * Authors: Steve Whitehouse <SteveW@ACM.org>
9 * Eduardo Marcelo Serrat <emserrat@geocities.com>
12 * Steve Whitehouse : Devices now see incoming frames so they
13 * can mark on who it came from.
14 * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
15 * can now have a device specific setup func.
16 * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
17 * Steve Whitehouse : Fixed bug which sometimes killed timer
18 * Steve Whitehouse : Multiple ifaddr support
19 * Steve Whitehouse : SIOCGIFCONF is now a compile time option
20 * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
21 * Steve Whitehouse : Removed timer1 - it's a user space issue now
22 * Patrick Caulfield : Fixed router hello message format
23 * Steve Whitehouse : Got rid of constant sizes for blksize for
24 * devices. All mtu based now.
27 #include <linux/capability.h>
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/init.h>
31 #include <linux/net.h>
32 #include <linux/netdevice.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/timer.h>
36 #include <linux/string.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_arp.h>
39 #include <linux/if_ether.h>
40 #include <linux/skbuff.h>
41 #include <linux/rtnetlink.h>
42 #include <linux/sysctl.h>
43 #include <linux/notifier.h>
44 #include <asm/uaccess.h>
45 #include <asm/system.h>
46 #include <net/neighbour.h>
49 #include <net/fib_rules.h>
51 #include <net/dn_dev.h>
52 #include <net/dn_route.h>
53 #include <net/dn_neigh.h>
54 #include <net/dn_fib.h>
56 #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
58 static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
59 static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
60 static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
61 static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
63 extern struct neigh_table dn_neigh_table;
66 * decnet_address is kept in network order.
68 __le16 decnet_address = 0;
70 static DEFINE_RWLOCK(dndev_lock);
71 static struct net_device *decnet_default_device;
72 static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
74 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
75 static void dn_dev_delete(struct net_device *dev);
76 static void rtmsg_ifa(int event, struct dn_ifaddr *ifa);
78 static int dn_eth_up(struct net_device *);
79 static void dn_eth_down(struct net_device *);
80 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
81 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83 static struct dn_dev_parms dn_dev_list[] = {
85 .type = ARPHRD_ETHER, /* Ethernet */
91 .ctl_name = NET_DECNET_CONF_ETHER,
94 .timer3 = dn_send_brd_hello,
97 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
103 .ctl_name = NET_DECNET_CONF_GRE,
104 .timer3 = dn_send_brd_hello,
108 .type = ARPHRD_X25, /* Bog standard X.25 */
109 .mode = DN_DEV_UCAST,
110 .state = DN_DEV_S_DS,
114 .ctl_name = NET_DECNET_CONF_X25,
115 .timer3 = dn_send_ptp_hello,
120 .type = ARPHRD_PPP, /* DECnet over PPP */
121 .mode = DN_DEV_BCAST,
122 .state = DN_DEV_S_RU,
126 .ctl_name = NET_DECNET_CONF_PPP,
127 .timer3 = dn_send_brd_hello,
131 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
132 .mode = DN_DEV_UCAST,
133 .state = DN_DEV_S_DS,
137 .ctl_name = NET_DECNET_CONF_DDCMP,
138 .timer3 = dn_send_ptp_hello,
141 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
142 .mode = DN_DEV_BCAST,
143 .state = DN_DEV_S_RU,
147 .ctl_name = NET_DECNET_CONF_LOOPBACK,
148 .timer3 = dn_send_brd_hello,
152 #define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms))
154 #define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
158 static int min_t2[] = { 1 };
159 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
160 static int min_t3[] = { 1 };
161 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
163 static int min_priority[1];
164 static int max_priority[] = { 127 }; /* From DECnet spec */
166 static int dn_forwarding_proc(ctl_table *, int, struct file *,
167 void __user *, size_t *, loff_t *);
168 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
169 void __user *oldval, size_t __user *oldlenp,
170 void __user *newval, size_t newlen,
173 static struct dn_dev_sysctl_table {
174 struct ctl_table_header *sysctl_header;
175 ctl_table dn_dev_vars[5];
176 ctl_table dn_dev_dev[2];
177 ctl_table dn_dev_conf_dir[2];
178 ctl_table dn_dev_proto_dir[2];
179 ctl_table dn_dev_root_dir[2];
184 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
185 .procname = "forwarding",
186 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
187 .maxlen = sizeof(int),
189 .proc_handler = dn_forwarding_proc,
190 .strategy = dn_forwarding_sysctl,
193 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
194 .procname = "priority",
195 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
196 .maxlen = sizeof(int),
198 .proc_handler = proc_dointvec_minmax,
199 .strategy = sysctl_intvec,
200 .extra1 = &min_priority,
201 .extra2 = &max_priority
204 .ctl_name = NET_DECNET_CONF_DEV_T2,
206 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
207 .maxlen = sizeof(int),
209 .proc_handler = proc_dointvec_minmax,
210 .strategy = sysctl_intvec,
215 .ctl_name = NET_DECNET_CONF_DEV_T3,
217 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
218 .maxlen = sizeof(int),
220 .proc_handler = proc_dointvec_minmax,
221 .strategy = sysctl_intvec,
231 .child = dn_dev_sysctl.dn_dev_vars
234 .ctl_name = NET_DECNET_CONF,
237 .child = dn_dev_sysctl.dn_dev_dev
240 .ctl_name = NET_DECNET,
241 .procname = "decnet",
243 .child = dn_dev_sysctl.dn_dev_conf_dir
249 .child = dn_dev_sysctl.dn_dev_proto_dir
253 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
255 struct dn_dev_sysctl_table *t;
258 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
262 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
263 long offset = (long)t->dn_dev_vars[i].data;
264 t->dn_dev_vars[i].data = ((char *)parms) + offset;
265 t->dn_dev_vars[i].de = NULL;
269 t->dn_dev_dev[0].procname = dev->name;
270 t->dn_dev_dev[0].ctl_name = dev->ifindex;
272 t->dn_dev_dev[0].procname = parms->name;
273 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
276 t->dn_dev_dev[0].child = t->dn_dev_vars;
277 t->dn_dev_dev[0].de = NULL;
278 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
279 t->dn_dev_conf_dir[0].de = NULL;
280 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
281 t->dn_dev_proto_dir[0].de = NULL;
282 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
283 t->dn_dev_root_dir[0].de = NULL;
284 t->dn_dev_vars[0].extra1 = (void *)dev;
286 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0);
287 if (t->sysctl_header == NULL)
293 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
296 struct dn_dev_sysctl_table *t = parms->sysctl;
297 parms->sysctl = NULL;
298 unregister_sysctl_table(t->sysctl_header);
303 static int dn_forwarding_proc(ctl_table *table, int write,
306 size_t *lenp, loff_t *ppos)
308 #ifdef CONFIG_DECNET_ROUTER
309 struct net_device *dev = table->extra1;
310 struct dn_dev *dn_db;
314 if (table->extra1 == NULL)
318 old = dn_db->parms.forwarding;
320 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
322 if ((err >= 0) && write) {
323 if (dn_db->parms.forwarding < 0)
324 dn_db->parms.forwarding = 0;
325 if (dn_db->parms.forwarding > 2)
326 dn_db->parms.forwarding = 2;
328 * What an ugly hack this is... its works, just. It
329 * would be nice if sysctl/proc were just that little
330 * bit more flexible so I don't have to write a special
331 * routine, or suffer hacks like this - SJW
333 tmp = dn_db->parms.forwarding;
334 dn_db->parms.forwarding = old;
335 if (dn_db->parms.down)
336 dn_db->parms.down(dev);
337 dn_db->parms.forwarding = tmp;
339 dn_db->parms.up(dev);
348 static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
349 void __user *oldval, size_t __user *oldlenp,
350 void __user *newval, size_t newlen,
353 #ifdef CONFIG_DECNET_ROUTER
354 struct net_device *dev = table->extra1;
355 struct dn_dev *dn_db;
358 if (table->extra1 == NULL)
363 if (newval && newlen) {
364 if (newlen != sizeof(int))
367 if (get_user(value, (int __user *)newval))
374 if (dn_db->parms.down)
375 dn_db->parms.down(dev);
376 dn_db->parms.forwarding = value;
378 dn_db->parms.up(dev);
387 #else /* CONFIG_SYSCTL */
388 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
391 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
395 #endif /* CONFIG_SYSCTL */
397 static inline __u16 mtu2blksize(struct net_device *dev)
399 u32 blksize = dev->mtu;
400 if (blksize > 0xffff)
403 if (dev->type == ARPHRD_ETHER ||
404 dev->type == ARPHRD_PPP ||
405 dev->type == ARPHRD_IPGRE ||
406 dev->type == ARPHRD_LOOPBACK)
409 return (__u16)blksize;
412 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
414 struct dn_ifaddr *ifa;
416 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
421 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
426 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
428 struct dn_ifaddr *ifa1 = *ifap;
429 unsigned char mac_addr[6];
430 struct net_device *dev = dn_db->dev;
434 *ifap = ifa1->ifa_next;
436 if (dn_db->dev->type == ARPHRD_ETHER) {
437 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
438 dn_dn2eth(mac_addr, ifa1->ifa_local);
439 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
443 rtmsg_ifa(RTM_DELADDR, ifa1);
444 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
446 dn_dev_free_ifa(ifa1);
448 if (dn_db->ifa_list == NULL)
449 dn_dev_delete(dn_db->dev);
453 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
455 struct net_device *dev = dn_db->dev;
456 struct dn_ifaddr *ifa1;
457 unsigned char mac_addr[6];
461 /* Check for duplicates */
462 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
463 if (ifa1->ifa_local == ifa->ifa_local)
467 if (dev->type == ARPHRD_ETHER) {
468 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
469 dn_dn2eth(mac_addr, ifa->ifa_local);
470 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
475 ifa->ifa_next = dn_db->ifa_list;
476 dn_db->ifa_list = ifa;
478 rtmsg_ifa(RTM_NEWADDR, ifa);
479 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
484 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
486 struct dn_dev *dn_db = dev->dn_ptr;
491 dn_db = dn_dev_create(dev, &err);
496 ifa->ifa_dev = dn_db;
498 if (dev->flags & IFF_LOOPBACK)
499 ifa->ifa_scope = RT_SCOPE_HOST;
501 rv = dn_dev_insert_ifa(dn_db, ifa);
503 dn_dev_free_ifa(ifa);
508 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
510 char buffer[DN_IFREQ_SIZE];
511 struct ifreq *ifr = (struct ifreq *)buffer;
512 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
513 struct dn_dev *dn_db;
514 struct net_device *dev;
515 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
518 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
520 ifr->ifr_name[IFNAMSIZ-1] = 0;
523 dev_load(ifr->ifr_name);
530 if (!capable(CAP_NET_ADMIN))
532 if (sdn->sdn_family != AF_DECnet)
541 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
546 if ((dn_db = dev->dn_ptr) != NULL) {
547 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
548 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
552 if (ifa == NULL && cmd != SIOCSIFADDR) {
553 ret = -EADDRNOTAVAIL;
559 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
564 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
568 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
570 if (ifa->ifa_local == dn_saddr2dn(sdn))
572 dn_dev_del_ifa(dn_db, ifap, 0);
575 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
577 ret = dn_dev_set_ifa(dev, ifa);
584 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
589 struct net_device *dn_dev_get_default(void)
591 struct net_device *dev;
592 read_lock(&dndev_lock);
593 dev = decnet_default_device;
600 read_unlock(&dndev_lock);
604 int dn_dev_set_default(struct net_device *dev, int force)
606 struct net_device *old = NULL;
610 write_lock(&dndev_lock);
611 if (force || decnet_default_device == NULL) {
612 old = decnet_default_device;
613 decnet_default_device = dev;
616 write_unlock(&dndev_lock);
622 static void dn_dev_check_default(struct net_device *dev)
624 write_lock(&dndev_lock);
625 if (dev == decnet_default_device) {
626 decnet_default_device = NULL;
630 write_unlock(&dndev_lock);
635 static struct dn_dev *dn_dev_by_index(int ifindex)
637 struct net_device *dev;
638 struct dn_dev *dn_dev = NULL;
639 dev = dev_get_by_index(ifindex);
641 dn_dev = dev->dn_ptr;
648 static int dn_dev_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
650 struct rtattr **rta = arg;
651 struct dn_dev *dn_db;
652 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
653 struct dn_ifaddr *ifa, **ifap;
655 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
656 return -EADDRNOTAVAIL;
658 for(ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) {
659 void *tmp = rta[IFA_LOCAL-1];
660 if ((tmp && memcmp(RTA_DATA(tmp), &ifa->ifa_local, 2)) ||
661 (rta[IFA_LABEL-1] && rtattr_strcmp(rta[IFA_LABEL-1], ifa->ifa_label)))
664 dn_dev_del_ifa(dn_db, ifap, 1);
668 return -EADDRNOTAVAIL;
671 static int dn_dev_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
673 struct rtattr **rta = arg;
674 struct net_device *dev;
675 struct dn_dev *dn_db;
676 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
677 struct dn_ifaddr *ifa;
680 if (rta[IFA_LOCAL-1] == NULL)
683 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
686 if ((dn_db = dev->dn_ptr) == NULL) {
688 dn_db = dn_dev_create(dev, &err);
693 if ((ifa = dn_dev_alloc_ifa()) == NULL)
696 if (!rta[IFA_ADDRESS - 1])
697 rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1];
698 memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL-1]), 2);
699 memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS-1]), 2);
700 ifa->ifa_flags = ifm->ifa_flags;
701 ifa->ifa_scope = ifm->ifa_scope;
702 ifa->ifa_dev = dn_db;
703 if (rta[IFA_LABEL-1])
704 rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL-1], IFNAMSIZ);
706 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
708 rv = dn_dev_insert_ifa(dn_db, ifa);
710 dn_dev_free_ifa(ifa);
714 static int dn_dev_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
715 u32 pid, u32 seq, int event, unsigned int flags)
717 struct ifaddrmsg *ifm;
718 struct nlmsghdr *nlh;
719 unsigned char *b = skb->tail;
721 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
722 ifm = NLMSG_DATA(nlh);
724 ifm->ifa_family = AF_DECnet;
725 ifm->ifa_prefixlen = 16;
726 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
727 ifm->ifa_scope = ifa->ifa_scope;
728 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
729 if (ifa->ifa_address)
730 RTA_PUT(skb, IFA_ADDRESS, 2, &ifa->ifa_address);
732 RTA_PUT(skb, IFA_LOCAL, 2, &ifa->ifa_local);
733 if (ifa->ifa_label[0])
734 RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label);
735 nlh->nlmsg_len = skb->tail - b;
740 skb_trim(skb, b - skb->data);
744 static void rtmsg_ifa(int event, struct dn_ifaddr *ifa)
747 int payload = sizeof(struct ifaddrmsg) + 128;
750 skb = alloc_skb(nlmsg_total_size(payload), GFP_KERNEL);
754 err = dn_dev_fill_ifaddr(skb, ifa, 0, 0, event, 0);
760 err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
763 rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err);
766 static int dn_dev_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
770 struct net_device *dev;
771 struct dn_dev *dn_db;
772 struct dn_ifaddr *ifa;
775 s_dn_idx = dn_idx = cb->args[1];
776 read_lock(&dev_base_lock);
777 for(dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
782 if ((dn_db = dev->dn_ptr) == NULL)
785 for(ifa = dn_db->ifa_list, dn_idx = 0; ifa; ifa = ifa->ifa_next, dn_idx++) {
786 if (dn_idx < s_dn_idx)
789 if (dn_dev_fill_ifaddr(skb, ifa,
790 NETLINK_CB(cb->skb).pid,
798 read_unlock(&dev_base_lock);
800 cb->args[1] = dn_idx;
805 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
807 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
808 struct dn_ifaddr *ifa;
812 ifa = dn_db->ifa_list;
814 *addr = ifa->ifa_local;
822 * Find a default address to bind to.
824 * This is one of those areas where the initial VMS concepts don't really
825 * map onto the Linux concepts, and since we introduced multiple addresses
826 * per interface we have to cope with slightly odd ways of finding out what
827 * "our address" really is. Mostly it's not a problem; for this we just guess
828 * a sensible default. Eventually the routing code will take care of all the
829 * nasties for us I hope.
831 int dn_dev_bind_default(__le16 *addr)
833 struct net_device *dev;
835 dev = dn_dev_get_default();
838 read_lock(&dev_base_lock);
839 rv = dn_dev_get_first(dev, addr);
840 read_unlock(&dev_base_lock);
842 if (rv == 0 || dev == &loopback_dev)
850 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
852 struct endnode_hello_message *msg;
853 struct sk_buff *skb = NULL;
855 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
857 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
862 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
865 memcpy(msg->tiver, dn_eco_version, 3);
866 dn_dn2eth(msg->id, ifa->ifa_local);
867 msg->iinfo = DN_RT_INFO_ENDN;
868 msg->blksize = dn_htons(mtu2blksize(dev));
870 memset(msg->seed, 0, 8);
871 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
874 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
875 dn_dn2eth(msg->neighbor, dn->addr);
878 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
881 memset(msg->data, 0xAA, 2);
883 pktlen = (__le16 *)skb_push(skb,2);
884 *pktlen = dn_htons(skb->len - 2);
886 skb->nh.raw = skb->data;
888 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
892 #define DRDELAY (5 * HZ)
894 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
896 /* First check time since device went up */
897 if ((jiffies - dn_db->uptime) < DRDELAY)
900 /* If there is no router, then yes... */
904 /* otherwise only if we have a higher priority or.. */
905 if (dn->priority < dn_db->parms.priority)
908 /* if we have equal priority and a higher node number */
909 if (dn->priority != dn_db->parms.priority)
912 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
918 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
921 struct dn_dev *dn_db = dev->dn_ptr;
922 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
926 unsigned char *i1, *i2;
930 if (mtu2blksize(dev) < (26 + 7))
933 n = mtu2blksize(dev) - 26;
939 size = 2 + 26 + 7 * n;
941 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
945 ptr = skb_put(skb, size);
947 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
948 *ptr++ = 2; /* ECO */
951 dn_dn2eth(ptr, ifa->ifa_local);
954 *ptr++ = dn_db->parms.forwarding == 1 ?
955 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
956 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
958 *ptr++ = dn_db->parms.priority; /* Priority */
959 *ptr++ = 0; /* Area: Reserved */
960 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
962 *ptr++ = 0; /* MPD: Reserved */
964 memset(ptr, 0, 7); /* Name: Reserved */
968 n = dn_neigh_elist(dev, ptr, n);
973 skb_trim(skb, (27 + *i2));
975 pktlen = (__le16 *)skb_push(skb, 2);
976 *pktlen = dn_htons(skb->len - 2);
978 skb->nh.raw = skb->data;
980 if (dn_am_i_a_router(dn, dn_db, ifa)) {
981 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
983 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
987 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
990 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
992 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
994 if (dn_db->parms.forwarding == 0)
995 dn_send_endnode_hello(dev, ifa);
997 dn_send_router_hello(dev, ifa);
1000 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1003 int size = dev->hard_header_len + 2 + 4 + tdlen;
1004 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1013 skb_push(skb, dev->hard_header_len);
1014 ptr = skb_put(skb, 2 + 4 + tdlen);
1016 *ptr++ = DN_RT_PKT_HELO;
1017 *((__le16 *)ptr) = ifa->ifa_local;
1021 for(i = 0; i < tdlen; i++)
1024 dn_dn2eth(src, ifa->ifa_local);
1025 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1028 static int dn_eth_up(struct net_device *dev)
1030 struct dn_dev *dn_db = dev->dn_ptr;
1032 if (dn_db->parms.forwarding == 0)
1033 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1035 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1039 dn_db->use_long = 1;
1044 static void dn_eth_down(struct net_device *dev)
1046 struct dn_dev *dn_db = dev->dn_ptr;
1048 if (dn_db->parms.forwarding == 0)
1049 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1051 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1054 static void dn_dev_set_timer(struct net_device *dev);
1056 static void dn_dev_timer_func(unsigned long arg)
1058 struct net_device *dev = (struct net_device *)arg;
1059 struct dn_dev *dn_db = dev->dn_ptr;
1060 struct dn_ifaddr *ifa;
1062 if (dn_db->t3 <= dn_db->parms.t2) {
1063 if (dn_db->parms.timer3) {
1064 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1065 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1066 dn_db->parms.timer3(dev, ifa);
1069 dn_db->t3 = dn_db->parms.t3;
1071 dn_db->t3 -= dn_db->parms.t2;
1074 dn_dev_set_timer(dev);
1077 static void dn_dev_set_timer(struct net_device *dev)
1079 struct dn_dev *dn_db = dev->dn_ptr;
1081 if (dn_db->parms.t2 > dn_db->parms.t3)
1082 dn_db->parms.t2 = dn_db->parms.t3;
1084 dn_db->timer.data = (unsigned long)dev;
1085 dn_db->timer.function = dn_dev_timer_func;
1086 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1088 add_timer(&dn_db->timer);
1091 struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1094 struct dn_dev_parms *p = dn_dev_list;
1095 struct dn_dev *dn_db;
1097 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1098 if (p->type == dev->type)
1103 if (i == DN_DEV_LIST_SIZE)
1107 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1110 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1112 dev->dn_ptr = dn_db;
1114 init_timer(&dn_db->timer);
1116 dn_db->uptime = jiffies;
1117 if (dn_db->parms.up) {
1118 if (dn_db->parms.up(dev) < 0) {
1125 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1127 dn_dev_sysctl_register(dev, &dn_db->parms);
1129 dn_dev_set_timer(dev);
1137 * This processes a device up event. We only start up
1138 * the loopback device & ethernet devices with correct
1139 * MAC addreses automatically. Others must be started
1142 * FIXME: How should we configure the loopback address ? If we could dispense
1143 * with using decnet_address here and for autobind, it will be one less thing
1144 * for users to worry about setting up.
1147 void dn_dev_up(struct net_device *dev)
1149 struct dn_ifaddr *ifa;
1150 __le16 addr = decnet_address;
1151 int maybe_default = 0;
1152 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1154 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1158 * Need to ensure that loopback device has a dn_db attached to it
1159 * to allow creation of neighbours against it, even though it might
1160 * not have a local address of its own. Might as well do the same for
1161 * all autoconfigured interfaces.
1163 if (dn_db == NULL) {
1165 dn_db = dn_dev_create(dev, &err);
1170 if (dev->type == ARPHRD_ETHER) {
1171 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1173 addr = dn_eth2dn(dev->dev_addr);
1180 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1183 ifa->ifa_local = ifa->ifa_address = addr;
1185 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1186 strcpy(ifa->ifa_label, dev->name);
1188 dn_dev_set_ifa(dev, ifa);
1191 * Automagically set the default device to the first automatically
1192 * configured ethernet card in the system.
1194 if (maybe_default) {
1196 if (dn_dev_set_default(dev, 0))
1201 static void dn_dev_delete(struct net_device *dev)
1203 struct dn_dev *dn_db = dev->dn_ptr;
1208 del_timer_sync(&dn_db->timer);
1209 dn_dev_sysctl_unregister(&dn_db->parms);
1210 dn_dev_check_default(dev);
1211 neigh_ifdown(&dn_neigh_table, dev);
1213 if (dn_db->parms.down)
1214 dn_db->parms.down(dev);
1218 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1219 neigh_ifdown(&dn_neigh_table, dev);
1222 neigh_release(dn_db->router);
1224 neigh_release(dn_db->peer);
1229 void dn_dev_down(struct net_device *dev)
1231 struct dn_dev *dn_db = dev->dn_ptr;
1232 struct dn_ifaddr *ifa;
1237 while((ifa = dn_db->ifa_list) != NULL) {
1238 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1239 dn_dev_free_ifa(ifa);
1245 void dn_dev_init_pkt(struct sk_buff *skb)
1250 void dn_dev_veri_pkt(struct sk_buff *skb)
1255 void dn_dev_hello(struct sk_buff *skb)
1260 void dn_dev_devices_off(void)
1262 struct net_device *dev;
1265 for(dev = dev_base; dev; dev = dev->next)
1271 void dn_dev_devices_on(void)
1273 struct net_device *dev;
1276 for(dev = dev_base; dev; dev = dev->next) {
1277 if (dev->flags & IFF_UP)
1283 int register_dnaddr_notifier(struct notifier_block *nb)
1285 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1288 int unregister_dnaddr_notifier(struct notifier_block *nb)
1290 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1293 #ifdef CONFIG_PROC_FS
1294 static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev)
1298 } while(dev && !dev->dn_ptr);
1303 static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos)
1305 struct net_device *dev;
1308 if (dev && !dev->dn_ptr)
1309 dev = dn_dev_get_next(seq, dev);
1311 while(dev && (dev = dn_dev_get_next(seq, dev)))
1317 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1320 struct net_device *dev;
1321 read_lock(&dev_base_lock);
1322 dev = dn_dev_get_idx(seq, *pos - 1);
1324 read_unlock(&dev_base_lock);
1327 return SEQ_START_TOKEN;
1330 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1332 struct net_device *dev = v;
1335 if (v == SEQ_START_TOKEN) {
1336 dev = dn_dev_seq_start(seq, &one);
1338 dev = dn_dev_get_next(seq, dev);
1340 read_unlock(&dev_base_lock);
1346 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1348 if (v && v != SEQ_START_TOKEN)
1349 read_unlock(&dev_base_lock);
1352 static char *dn_type2asc(char type)
1366 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1368 if (v == SEQ_START_TOKEN)
1369 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1371 struct net_device *dev = v;
1372 char peer_buf[DN_ASCBUF_LEN];
1373 char router_buf[DN_ASCBUF_LEN];
1374 struct dn_dev *dn_db = dev->dn_ptr;
1376 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1377 " %04hu %03d %02x %-10s %-7s %-7s\n",
1378 dev->name ? dev->name : "???",
1379 dn_type2asc(dn_db->parms.mode),
1381 dn_db->t3, dn_db->parms.t3,
1383 dn_db->parms.priority,
1384 dn_db->parms.state, dn_db->parms.name,
1385 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1386 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1391 static struct seq_operations dn_dev_seq_ops = {
1392 .start = dn_dev_seq_start,
1393 .next = dn_dev_seq_next,
1394 .stop = dn_dev_seq_stop,
1395 .show = dn_dev_seq_show,
1398 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1400 return seq_open(file, &dn_dev_seq_ops);
1403 static struct file_operations dn_dev_seq_fops = {
1404 .owner = THIS_MODULE,
1405 .open = dn_dev_seq_open,
1407 .llseek = seq_lseek,
1408 .release = seq_release,
1411 #endif /* CONFIG_PROC_FS */
1413 static struct rtnetlink_link dnet_rtnetlink_table[RTM_NR_MSGTYPES] =
1415 [RTM_NEWADDR - RTM_BASE] = { .doit = dn_dev_rtm_newaddr, },
1416 [RTM_DELADDR - RTM_BASE] = { .doit = dn_dev_rtm_deladdr, },
1417 [RTM_GETADDR - RTM_BASE] = { .dumpit = dn_dev_dump_ifaddr, },
1418 #ifdef CONFIG_DECNET_ROUTER
1419 [RTM_NEWROUTE - RTM_BASE] = { .doit = dn_fib_rtm_newroute, },
1420 [RTM_DELROUTE - RTM_BASE] = { .doit = dn_fib_rtm_delroute, },
1421 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1422 .dumpit = dn_fib_dump, },
1423 [RTM_GETRULE - RTM_BASE] = { .dumpit = dn_fib_dump_rules, },
1425 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1426 .dumpit = dn_cache_dump, },
1431 static int __initdata addr[2];
1432 module_param_array(addr, int, NULL, 0444);
1433 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1435 void __init dn_dev_init(void)
1437 if (addr[0] > 63 || addr[0] < 0) {
1438 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1442 if (addr[1] > 1023 || addr[1] < 0) {
1443 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1447 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1449 dn_dev_devices_on();
1451 rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table;
1453 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1455 #ifdef CONFIG_SYSCTL
1458 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1459 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1461 #endif /* CONFIG_SYSCTL */
1464 void __exit dn_dev_cleanup(void)
1466 rtnetlink_links[PF_DECnet] = NULL;
1468 #ifdef CONFIG_SYSCTL
1471 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1472 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1474 #endif /* CONFIG_SYSCTL */
1476 proc_net_remove("decnet_dev");
1478 dn_dev_devices_off();