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/sysctl.h>
42 #include <linux/notifier.h>
43 #include <asm/uaccess.h>
44 #include <asm/system.h>
45 #include <net/net_namespace.h>
46 #include <net/neighbour.h>
49 #include <net/fib_rules.h>
50 #include <net/netlink.h>
52 #include <net/dn_dev.h>
53 #include <net/dn_route.h>
54 #include <net/dn_neigh.h>
55 #include <net/dn_fib.h>
57 #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
59 static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
60 static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
61 static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
62 static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
64 extern struct neigh_table dn_neigh_table;
67 * decnet_address is kept in network order.
69 __le16 decnet_address = 0;
71 static DEFINE_RWLOCK(dndev_lock);
72 static struct net_device *decnet_default_device;
73 static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
75 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
76 static void dn_dev_delete(struct net_device *dev);
77 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
79 static int dn_eth_up(struct net_device *);
80 static void dn_eth_down(struct net_device *);
81 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
84 static struct dn_dev_parms dn_dev_list[] = {
86 .type = ARPHRD_ETHER, /* Ethernet */
92 .ctl_name = NET_DECNET_CONF_ETHER,
95 .timer3 = dn_send_brd_hello,
98 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
100 .state = DN_DEV_S_RU,
104 .ctl_name = NET_DECNET_CONF_GRE,
105 .timer3 = dn_send_brd_hello,
109 .type = ARPHRD_X25, /* Bog standard X.25 */
110 .mode = DN_DEV_UCAST,
111 .state = DN_DEV_S_DS,
115 .ctl_name = NET_DECNET_CONF_X25,
116 .timer3 = dn_send_ptp_hello,
121 .type = ARPHRD_PPP, /* DECnet over PPP */
122 .mode = DN_DEV_BCAST,
123 .state = DN_DEV_S_RU,
127 .ctl_name = NET_DECNET_CONF_PPP,
128 .timer3 = dn_send_brd_hello,
132 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
133 .mode = DN_DEV_UCAST,
134 .state = DN_DEV_S_DS,
138 .ctl_name = NET_DECNET_CONF_DDCMP,
139 .timer3 = dn_send_ptp_hello,
142 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
143 .mode = DN_DEV_BCAST,
144 .state = DN_DEV_S_RU,
148 .ctl_name = NET_DECNET_CONF_LOOPBACK,
149 .timer3 = dn_send_brd_hello,
153 #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
155 #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
159 static int min_t2[] = { 1 };
160 static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
161 static int min_t3[] = { 1 };
162 static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
164 static int min_priority[1];
165 static int max_priority[] = { 127 }; /* From DECnet spec */
167 static int dn_forwarding_proc(ctl_table *, int, struct file *,
168 void __user *, size_t *, loff_t *);
169 static int dn_forwarding_sysctl(ctl_table *table,
170 void __user *oldval, size_t __user *oldlenp,
171 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];
180 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
181 .procname = "forwarding",
182 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
183 .maxlen = sizeof(int),
185 .proc_handler = dn_forwarding_proc,
186 .strategy = dn_forwarding_sysctl,
189 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
190 .procname = "priority",
191 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
192 .maxlen = sizeof(int),
194 .proc_handler = proc_dointvec_minmax,
195 .strategy = sysctl_intvec,
196 .extra1 = &min_priority,
197 .extra2 = &max_priority
200 .ctl_name = NET_DECNET_CONF_DEV_T2,
202 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
203 .maxlen = sizeof(int),
205 .proc_handler = proc_dointvec_minmax,
206 .strategy = sysctl_intvec,
211 .ctl_name = NET_DECNET_CONF_DEV_T3,
213 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
214 .maxlen = sizeof(int),
216 .proc_handler = proc_dointvec_minmax,
217 .strategy = sysctl_intvec,
225 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
227 struct dn_dev_sysctl_table *t;
230 #define DN_CTL_PATH_DEV 3
232 struct ctl_path dn_ctl_path[] = {
233 { .procname = "net", .ctl_name = CTL_NET, },
234 { .procname = "decnet", .ctl_name = NET_DECNET, },
235 { .procname = "conf", .ctl_name = NET_DECNET_CONF, },
240 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
244 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
245 long offset = (long)t->dn_dev_vars[i].data;
246 t->dn_dev_vars[i].data = ((char *)parms) + offset;
250 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
251 dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = dev->ifindex;
253 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
254 dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = parms->ctl_name;
257 t->dn_dev_vars[0].extra1 = (void *)dev;
259 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
260 if (t->sysctl_header == NULL)
266 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
269 struct dn_dev_sysctl_table *t = parms->sysctl;
270 parms->sysctl = NULL;
271 unregister_sysctl_table(t->sysctl_header);
276 static int dn_forwarding_proc(ctl_table *table, int write,
279 size_t *lenp, loff_t *ppos)
281 #ifdef CONFIG_DECNET_ROUTER
282 struct net_device *dev = table->extra1;
283 struct dn_dev *dn_db;
287 if (table->extra1 == NULL)
291 old = dn_db->parms.forwarding;
293 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
295 if ((err >= 0) && write) {
296 if (dn_db->parms.forwarding < 0)
297 dn_db->parms.forwarding = 0;
298 if (dn_db->parms.forwarding > 2)
299 dn_db->parms.forwarding = 2;
301 * What an ugly hack this is... its works, just. It
302 * would be nice if sysctl/proc were just that little
303 * bit more flexible so I don't have to write a special
304 * routine, or suffer hacks like this - SJW
306 tmp = dn_db->parms.forwarding;
307 dn_db->parms.forwarding = old;
308 if (dn_db->parms.down)
309 dn_db->parms.down(dev);
310 dn_db->parms.forwarding = tmp;
312 dn_db->parms.up(dev);
321 static int dn_forwarding_sysctl(ctl_table *table,
322 void __user *oldval, size_t __user *oldlenp,
323 void __user *newval, size_t newlen)
325 #ifdef CONFIG_DECNET_ROUTER
326 struct net_device *dev = table->extra1;
327 struct dn_dev *dn_db;
330 if (table->extra1 == NULL)
335 if (newval && newlen) {
336 if (newlen != sizeof(int))
339 if (get_user(value, (int __user *)newval))
346 if (dn_db->parms.down)
347 dn_db->parms.down(dev);
348 dn_db->parms.forwarding = value;
350 dn_db->parms.up(dev);
359 #else /* CONFIG_SYSCTL */
360 static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
363 static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
367 #endif /* CONFIG_SYSCTL */
369 static inline __u16 mtu2blksize(struct net_device *dev)
371 u32 blksize = dev->mtu;
372 if (blksize > 0xffff)
375 if (dev->type == ARPHRD_ETHER ||
376 dev->type == ARPHRD_PPP ||
377 dev->type == ARPHRD_IPGRE ||
378 dev->type == ARPHRD_LOOPBACK)
381 return (__u16)blksize;
384 static struct dn_ifaddr *dn_dev_alloc_ifa(void)
386 struct dn_ifaddr *ifa;
388 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
393 static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
398 static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
400 struct dn_ifaddr *ifa1 = *ifap;
401 unsigned char mac_addr[6];
402 struct net_device *dev = dn_db->dev;
406 *ifap = ifa1->ifa_next;
408 if (dn_db->dev->type == ARPHRD_ETHER) {
409 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
410 dn_dn2eth(mac_addr, ifa1->ifa_local);
411 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
415 dn_ifaddr_notify(RTM_DELADDR, ifa1);
416 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
418 dn_dev_free_ifa(ifa1);
420 if (dn_db->ifa_list == NULL)
421 dn_dev_delete(dn_db->dev);
425 static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
427 struct net_device *dev = dn_db->dev;
428 struct dn_ifaddr *ifa1;
429 unsigned char mac_addr[6];
433 /* Check for duplicates */
434 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
435 if (ifa1->ifa_local == ifa->ifa_local)
439 if (dev->type == ARPHRD_ETHER) {
440 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
441 dn_dn2eth(mac_addr, ifa->ifa_local);
442 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
446 ifa->ifa_next = dn_db->ifa_list;
447 dn_db->ifa_list = ifa;
449 dn_ifaddr_notify(RTM_NEWADDR, ifa);
450 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
455 static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
457 struct dn_dev *dn_db = dev->dn_ptr;
462 dn_db = dn_dev_create(dev, &err);
467 ifa->ifa_dev = dn_db;
469 if (dev->flags & IFF_LOOPBACK)
470 ifa->ifa_scope = RT_SCOPE_HOST;
472 rv = dn_dev_insert_ifa(dn_db, ifa);
474 dn_dev_free_ifa(ifa);
479 int dn_dev_ioctl(unsigned int cmd, void __user *arg)
481 char buffer[DN_IFREQ_SIZE];
482 struct ifreq *ifr = (struct ifreq *)buffer;
483 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
484 struct dn_dev *dn_db;
485 struct net_device *dev;
486 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
489 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
491 ifr->ifr_name[IFNAMSIZ-1] = 0;
493 dev_load(&init_net, ifr->ifr_name);
499 if (!capable(CAP_NET_ADMIN))
501 if (sdn->sdn_family != AF_DECnet)
510 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
515 if ((dn_db = dev->dn_ptr) != NULL) {
516 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
517 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
521 if (ifa == NULL && cmd != SIOCSIFADDR) {
522 ret = -EADDRNOTAVAIL;
528 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
533 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
537 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
539 if (ifa->ifa_local == dn_saddr2dn(sdn))
541 dn_dev_del_ifa(dn_db, ifap, 0);
544 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
546 ret = dn_dev_set_ifa(dev, ifa);
553 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
558 struct net_device *dn_dev_get_default(void)
560 struct net_device *dev;
561 read_lock(&dndev_lock);
562 dev = decnet_default_device;
569 read_unlock(&dndev_lock);
573 int dn_dev_set_default(struct net_device *dev, int force)
575 struct net_device *old = NULL;
579 write_lock(&dndev_lock);
580 if (force || decnet_default_device == NULL) {
581 old = decnet_default_device;
582 decnet_default_device = dev;
585 write_unlock(&dndev_lock);
591 static void dn_dev_check_default(struct net_device *dev)
593 write_lock(&dndev_lock);
594 if (dev == decnet_default_device) {
595 decnet_default_device = NULL;
599 write_unlock(&dndev_lock);
604 static struct dn_dev *dn_dev_by_index(int ifindex)
606 struct net_device *dev;
607 struct dn_dev *dn_dev = NULL;
608 dev = dev_get_by_index(&init_net, ifindex);
610 dn_dev = dev->dn_ptr;
617 static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
618 [IFA_ADDRESS] = { .type = NLA_U16 },
619 [IFA_LOCAL] = { .type = NLA_U16 },
620 [IFA_LABEL] = { .type = NLA_STRING,
621 .len = IFNAMSIZ - 1 },
624 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
626 struct net *net = sock_net(skb->sk);
627 struct nlattr *tb[IFA_MAX+1];
628 struct dn_dev *dn_db;
629 struct ifaddrmsg *ifm;
630 struct dn_ifaddr *ifa, **ifap;
633 if (net != &init_net)
636 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
641 ifm = nlmsg_data(nlh);
642 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
645 err = -EADDRNOTAVAIL;
646 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
648 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
651 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
654 dn_dev_del_ifa(dn_db, ifap, 1);
662 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
664 struct net *net = sock_net(skb->sk);
665 struct nlattr *tb[IFA_MAX+1];
666 struct net_device *dev;
667 struct dn_dev *dn_db;
668 struct ifaddrmsg *ifm;
669 struct dn_ifaddr *ifa;
672 if (net != &init_net)
675 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
679 if (tb[IFA_LOCAL] == NULL)
682 ifm = nlmsg_data(nlh);
683 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
686 if ((dn_db = dev->dn_ptr) == NULL) {
687 dn_db = dn_dev_create(dev, &err);
692 if ((ifa = dn_dev_alloc_ifa()) == NULL)
695 if (tb[IFA_ADDRESS] == NULL)
696 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
698 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
699 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
700 ifa->ifa_flags = ifm->ifa_flags;
701 ifa->ifa_scope = ifm->ifa_scope;
702 ifa->ifa_dev = dn_db;
705 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
707 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
709 err = dn_dev_insert_ifa(dn_db, ifa);
711 dn_dev_free_ifa(ifa);
716 static inline size_t dn_ifaddr_nlmsg_size(void)
718 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
719 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
720 + nla_total_size(2) /* IFA_ADDRESS */
721 + nla_total_size(2); /* IFA_LOCAL */
724 static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
725 u32 pid, u32 seq, int event, unsigned int flags)
727 struct ifaddrmsg *ifm;
728 struct nlmsghdr *nlh;
730 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
734 ifm = nlmsg_data(nlh);
735 ifm->ifa_family = AF_DECnet;
736 ifm->ifa_prefixlen = 16;
737 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
738 ifm->ifa_scope = ifa->ifa_scope;
739 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
741 if (ifa->ifa_address)
742 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
744 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
745 if (ifa->ifa_label[0])
746 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
748 return nlmsg_end(skb, nlh);
751 nlmsg_cancel(skb, nlh);
755 static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
760 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
764 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
766 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
767 WARN_ON(err == -EMSGSIZE);
771 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
775 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
778 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
780 struct net *net = sock_net(skb->sk);
781 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
782 struct net_device *dev;
783 struct dn_dev *dn_db;
784 struct dn_ifaddr *ifa;
786 if (net != &init_net)
789 skip_ndevs = cb->args[0];
790 skip_naddr = cb->args[1];
793 for_each_netdev(&init_net, dev) {
794 if (idx < skip_ndevs)
796 else if (idx > skip_ndevs) {
797 /* Only skip over addresses for first dev dumped
798 * in this iteration (idx == skip_ndevs) */
802 if ((dn_db = dev->dn_ptr) == NULL)
805 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
806 ifa = ifa->ifa_next, dn_idx++) {
807 if (dn_idx < skip_naddr)
810 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
811 cb->nlh->nlmsg_seq, RTM_NEWADDR,
820 cb->args[1] = dn_idx;
825 static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
827 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
828 struct dn_ifaddr *ifa;
832 ifa = dn_db->ifa_list;
834 *addr = ifa->ifa_local;
842 * Find a default address to bind to.
844 * This is one of those areas where the initial VMS concepts don't really
845 * map onto the Linux concepts, and since we introduced multiple addresses
846 * per interface we have to cope with slightly odd ways of finding out what
847 * "our address" really is. Mostly it's not a problem; for this we just guess
848 * a sensible default. Eventually the routing code will take care of all the
849 * nasties for us I hope.
851 int dn_dev_bind_default(__le16 *addr)
853 struct net_device *dev;
855 dev = dn_dev_get_default();
858 read_lock(&dev_base_lock);
859 rv = dn_dev_get_first(dev, addr);
860 read_unlock(&dev_base_lock);
862 if (rv == 0 || dev == init_net.loopback_dev)
865 dev = init_net.loopback_dev;
870 static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
872 struct endnode_hello_message *msg;
873 struct sk_buff *skb = NULL;
875 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
877 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
882 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
885 memcpy(msg->tiver, dn_eco_version, 3);
886 dn_dn2eth(msg->id, ifa->ifa_local);
887 msg->iinfo = DN_RT_INFO_ENDN;
888 msg->blksize = cpu_to_le16(mtu2blksize(dev));
890 memset(msg->seed, 0, 8);
891 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
894 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
895 dn_dn2eth(msg->neighbor, dn->addr);
898 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
901 memset(msg->data, 0xAA, 2);
903 pktlen = (__le16 *)skb_push(skb,2);
904 *pktlen = cpu_to_le16(skb->len - 2);
906 skb_reset_network_header(skb);
908 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
912 #define DRDELAY (5 * HZ)
914 static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
916 /* First check time since device went up */
917 if ((jiffies - dn_db->uptime) < DRDELAY)
920 /* If there is no router, then yes... */
924 /* otherwise only if we have a higher priority or.. */
925 if (dn->priority < dn_db->parms.priority)
928 /* if we have equal priority and a higher node number */
929 if (dn->priority != dn_db->parms.priority)
932 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
938 static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
941 struct dn_dev *dn_db = dev->dn_ptr;
942 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
946 unsigned char *i1, *i2;
950 if (mtu2blksize(dev) < (26 + 7))
953 n = mtu2blksize(dev) - 26;
959 size = 2 + 26 + 7 * n;
961 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
965 ptr = skb_put(skb, size);
967 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
968 *ptr++ = 2; /* ECO */
971 dn_dn2eth(ptr, ifa->ifa_local);
974 *ptr++ = dn_db->parms.forwarding == 1 ?
975 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
976 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
978 *ptr++ = dn_db->parms.priority; /* Priority */
979 *ptr++ = 0; /* Area: Reserved */
980 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
982 *ptr++ = 0; /* MPD: Reserved */
984 memset(ptr, 0, 7); /* Name: Reserved */
988 n = dn_neigh_elist(dev, ptr, n);
993 skb_trim(skb, (27 + *i2));
995 pktlen = (__le16 *)skb_push(skb, 2);
996 *pktlen = cpu_to_le16(skb->len - 2);
998 skb_reset_network_header(skb);
1000 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1001 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1003 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1007 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1010 static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1012 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1014 if (dn_db->parms.forwarding == 0)
1015 dn_send_endnode_hello(dev, ifa);
1017 dn_send_router_hello(dev, ifa);
1020 static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1023 int size = dev->hard_header_len + 2 + 4 + tdlen;
1024 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1033 skb_push(skb, dev->hard_header_len);
1034 ptr = skb_put(skb, 2 + 4 + tdlen);
1036 *ptr++ = DN_RT_PKT_HELO;
1037 *((__le16 *)ptr) = ifa->ifa_local;
1041 for(i = 0; i < tdlen; i++)
1044 dn_dn2eth(src, ifa->ifa_local);
1045 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1048 static int dn_eth_up(struct net_device *dev)
1050 struct dn_dev *dn_db = dev->dn_ptr;
1052 if (dn_db->parms.forwarding == 0)
1053 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1055 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1057 dn_db->use_long = 1;
1062 static void dn_eth_down(struct net_device *dev)
1064 struct dn_dev *dn_db = dev->dn_ptr;
1066 if (dn_db->parms.forwarding == 0)
1067 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1069 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1072 static void dn_dev_set_timer(struct net_device *dev);
1074 static void dn_dev_timer_func(unsigned long arg)
1076 struct net_device *dev = (struct net_device *)arg;
1077 struct dn_dev *dn_db = dev->dn_ptr;
1078 struct dn_ifaddr *ifa;
1080 if (dn_db->t3 <= dn_db->parms.t2) {
1081 if (dn_db->parms.timer3) {
1082 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1083 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1084 dn_db->parms.timer3(dev, ifa);
1087 dn_db->t3 = dn_db->parms.t3;
1089 dn_db->t3 -= dn_db->parms.t2;
1092 dn_dev_set_timer(dev);
1095 static void dn_dev_set_timer(struct net_device *dev)
1097 struct dn_dev *dn_db = dev->dn_ptr;
1099 if (dn_db->parms.t2 > dn_db->parms.t3)
1100 dn_db->parms.t2 = dn_db->parms.t3;
1102 dn_db->timer.data = (unsigned long)dev;
1103 dn_db->timer.function = dn_dev_timer_func;
1104 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1106 add_timer(&dn_db->timer);
1109 static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1112 struct dn_dev_parms *p = dn_dev_list;
1113 struct dn_dev *dn_db;
1115 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1116 if (p->type == dev->type)
1121 if (i == DN_DEV_LIST_SIZE)
1125 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1128 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1130 dev->dn_ptr = dn_db;
1132 init_timer(&dn_db->timer);
1134 dn_db->uptime = jiffies;
1136 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1137 if (!dn_db->neigh_parms) {
1143 if (dn_db->parms.up) {
1144 if (dn_db->parms.up(dev) < 0) {
1145 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1152 dn_dev_sysctl_register(dev, &dn_db->parms);
1154 dn_dev_set_timer(dev);
1162 * This processes a device up event. We only start up
1163 * the loopback device & ethernet devices with correct
1164 * MAC addreses automatically. Others must be started
1167 * FIXME: How should we configure the loopback address ? If we could dispense
1168 * with using decnet_address here and for autobind, it will be one less thing
1169 * for users to worry about setting up.
1172 void dn_dev_up(struct net_device *dev)
1174 struct dn_ifaddr *ifa;
1175 __le16 addr = decnet_address;
1176 int maybe_default = 0;
1177 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1179 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1183 * Need to ensure that loopback device has a dn_db attached to it
1184 * to allow creation of neighbours against it, even though it might
1185 * not have a local address of its own. Might as well do the same for
1186 * all autoconfigured interfaces.
1188 if (dn_db == NULL) {
1190 dn_db = dn_dev_create(dev, &err);
1195 if (dev->type == ARPHRD_ETHER) {
1196 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1198 addr = dn_eth2dn(dev->dev_addr);
1205 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1208 ifa->ifa_local = ifa->ifa_address = addr;
1210 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1211 strcpy(ifa->ifa_label, dev->name);
1213 dn_dev_set_ifa(dev, ifa);
1216 * Automagically set the default device to the first automatically
1217 * configured ethernet card in the system.
1219 if (maybe_default) {
1221 if (dn_dev_set_default(dev, 0))
1226 static void dn_dev_delete(struct net_device *dev)
1228 struct dn_dev *dn_db = dev->dn_ptr;
1233 del_timer_sync(&dn_db->timer);
1234 dn_dev_sysctl_unregister(&dn_db->parms);
1235 dn_dev_check_default(dev);
1236 neigh_ifdown(&dn_neigh_table, dev);
1238 if (dn_db->parms.down)
1239 dn_db->parms.down(dev);
1243 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1244 neigh_ifdown(&dn_neigh_table, dev);
1247 neigh_release(dn_db->router);
1249 neigh_release(dn_db->peer);
1254 void dn_dev_down(struct net_device *dev)
1256 struct dn_dev *dn_db = dev->dn_ptr;
1257 struct dn_ifaddr *ifa;
1262 while((ifa = dn_db->ifa_list) != NULL) {
1263 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1264 dn_dev_free_ifa(ifa);
1270 void dn_dev_init_pkt(struct sk_buff *skb)
1275 void dn_dev_veri_pkt(struct sk_buff *skb)
1280 void dn_dev_hello(struct sk_buff *skb)
1285 void dn_dev_devices_off(void)
1287 struct net_device *dev;
1290 for_each_netdev(&init_net, dev)
1296 void dn_dev_devices_on(void)
1298 struct net_device *dev;
1301 for_each_netdev(&init_net, dev) {
1302 if (dev->flags & IFF_UP)
1308 int register_dnaddr_notifier(struct notifier_block *nb)
1310 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1313 int unregister_dnaddr_notifier(struct notifier_block *nb)
1315 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1318 #ifdef CONFIG_PROC_FS
1319 static inline int is_dn_dev(struct net_device *dev)
1321 return dev->dn_ptr != NULL;
1324 static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1325 __acquires(&dev_base_lock)
1328 struct net_device *dev;
1330 read_lock(&dev_base_lock);
1333 return SEQ_START_TOKEN;
1336 for_each_netdev(&init_net, dev) {
1337 if (!is_dn_dev(dev))
1347 static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1349 struct net_device *dev;
1353 dev = (struct net_device *)v;
1354 if (v == SEQ_START_TOKEN)
1355 dev = net_device_entry(&init_net.dev_base_head);
1357 for_each_netdev_continue(&init_net, dev) {
1358 if (!is_dn_dev(dev))
1367 static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1368 __releases(&dev_base_lock)
1370 read_unlock(&dev_base_lock);
1373 static char *dn_type2asc(char type)
1387 static int dn_dev_seq_show(struct seq_file *seq, void *v)
1389 if (v == SEQ_START_TOKEN)
1390 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1392 struct net_device *dev = v;
1393 char peer_buf[DN_ASCBUF_LEN];
1394 char router_buf[DN_ASCBUF_LEN];
1395 struct dn_dev *dn_db = dev->dn_ptr;
1397 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1398 " %04hu %03d %02x %-10s %-7s %-7s\n",
1399 dev->name ? dev->name : "???",
1400 dn_type2asc(dn_db->parms.mode),
1402 dn_db->t3, dn_db->parms.t3,
1404 dn_db->parms.priority,
1405 dn_db->parms.state, dn_db->parms.name,
1406 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1407 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1412 static const struct seq_operations dn_dev_seq_ops = {
1413 .start = dn_dev_seq_start,
1414 .next = dn_dev_seq_next,
1415 .stop = dn_dev_seq_stop,
1416 .show = dn_dev_seq_show,
1419 static int dn_dev_seq_open(struct inode *inode, struct file *file)
1421 return seq_open(file, &dn_dev_seq_ops);
1424 static const struct file_operations dn_dev_seq_fops = {
1425 .owner = THIS_MODULE,
1426 .open = dn_dev_seq_open,
1428 .llseek = seq_lseek,
1429 .release = seq_release,
1432 #endif /* CONFIG_PROC_FS */
1435 module_param_array(addr, int, NULL, 0444);
1436 MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1438 void __init dn_dev_init(void)
1440 if (addr[0] > 63 || addr[0] < 0) {
1441 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1445 if (addr[1] > 1023 || addr[1] < 0) {
1446 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1450 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1452 dn_dev_devices_on();
1454 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1455 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1456 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1458 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1460 #ifdef CONFIG_SYSCTL
1463 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1464 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1466 #endif /* CONFIG_SYSCTL */
1469 void __exit dn_dev_cleanup(void)
1471 #ifdef CONFIG_SYSCTL
1474 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1475 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1477 #endif /* CONFIG_SYSCTL */
1479 proc_net_remove(&init_net, "decnet_dev");
1481 dn_dev_devices_off();