1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
5 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
6 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
7 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
10 #include <linux/capability.h>
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/init.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/socket.h>
18 #include <linux/slab.h>
19 #include <linux/kernel.h>
20 #include <linux/sched/signal.h>
21 #include <linux/spinlock.h>
22 #include <linux/timer.h>
23 #include <linux/string.h>
24 #include <linux/sockios.h>
25 #include <linux/net.h>
26 #include <linux/stat.h>
27 #include <net/net_namespace.h>
29 #include <linux/inet.h>
30 #include <linux/netdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/skbuff.h>
34 #include <linux/uaccess.h>
35 #include <linux/fcntl.h>
36 #include <linux/termios.h>
38 #include <linux/interrupt.h>
39 #include <linux/notifier.h>
41 #include <linux/proc_fs.h>
42 #include <linux/seq_file.h>
43 #include <net/tcp_states.h>
47 static int rose_ndevs = 10;
49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
50 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
51 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
52 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
53 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
54 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
55 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
56 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
57 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
58 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
60 static HLIST_HEAD(rose_list);
61 static DEFINE_SPINLOCK(rose_list_lock);
63 static const struct proto_ops rose_proto_ops;
65 ax25_address rose_callsign;
68 * ROSE network devices are virtual network devices encapsulating ROSE
69 * frames into AX.25 which will be sent through an AX.25 device, so form a
70 * special "super class" of normal net devices; split their locks off into a
71 * separate class since they always nest.
73 static struct lock_class_key rose_netdev_xmit_lock_key;
74 static struct lock_class_key rose_netdev_addr_lock_key;
76 static void rose_set_lockdep_one(struct net_device *dev,
77 struct netdev_queue *txq,
80 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
83 static void rose_set_lockdep_key(struct net_device *dev)
85 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
86 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
90 * Convert a ROSE address into text.
92 char *rose2asc(char *buf, const rose_address *addr)
94 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
95 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
96 addr->rose_addr[4] == 0x00) {
99 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
100 addr->rose_addr[1] & 0xFF,
101 addr->rose_addr[2] & 0xFF,
102 addr->rose_addr[3] & 0xFF,
103 addr->rose_addr[4] & 0xFF);
110 * Compare two ROSE addresses, 0 == equal.
112 int rosecmp(const rose_address *addr1, const rose_address *addr2)
116 for (i = 0; i < 5; i++)
117 if (addr1->rose_addr[i] != addr2->rose_addr[i])
124 * Compare two ROSE addresses for only mask digits, 0 == equal.
126 int rosecmpm(const rose_address *addr1, const rose_address *addr2,
134 for (i = 0; i < mask; i++) {
138 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
150 * Socket removal during an interrupt is now safe.
152 static void rose_remove_socket(struct sock *sk)
154 spin_lock_bh(&rose_list_lock);
155 sk_del_node_init(sk);
156 spin_unlock_bh(&rose_list_lock);
160 * Kill all bound sockets on a broken link layer connection to a
161 * particular neighbour.
163 void rose_kill_by_neigh(struct rose_neigh *neigh)
167 spin_lock_bh(&rose_list_lock);
168 sk_for_each(s, &rose_list) {
169 struct rose_sock *rose = rose_sk(s);
171 if (rose->neighbour == neigh) {
172 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
173 rose->neighbour->use--;
174 rose->neighbour = NULL;
177 spin_unlock_bh(&rose_list_lock);
181 * Kill all bound sockets on a dropped device.
183 static void rose_kill_by_device(struct net_device *dev)
185 struct sock *sk, *array[16];
186 struct rose_sock *rose;
193 spin_lock_bh(&rose_list_lock);
194 sk_for_each(sk, &rose_list) {
196 if (rose->device == dev) {
197 if (cnt == ARRAY_SIZE(array)) {
205 spin_unlock_bh(&rose_list_lock);
207 for (i = 0; i < cnt; i++) {
211 spin_lock_bh(&rose_list_lock);
212 if (rose->device == dev) {
213 rose_disconnect(sk, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
215 rose->neighbour->use--;
216 netdev_put(rose->device, &rose->dev_tracker);
219 spin_unlock_bh(&rose_list_lock);
229 * Handle device status changes.
231 static int rose_device_event(struct notifier_block *this,
232 unsigned long event, void *ptr)
234 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
236 if (!net_eq(dev_net(dev), &init_net))
239 if (event != NETDEV_DOWN)
244 rose_kill_by_device(dev);
247 rose_link_device_down(dev);
248 rose_rt_device_down(dev);
256 * Add a socket to the bound sockets list.
258 static void rose_insert_socket(struct sock *sk)
261 spin_lock_bh(&rose_list_lock);
262 sk_add_node(sk, &rose_list);
263 spin_unlock_bh(&rose_list_lock);
267 * Find a socket that wants to accept the Call Request we just
270 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
274 spin_lock_bh(&rose_list_lock);
275 sk_for_each(s, &rose_list) {
276 struct rose_sock *rose = rose_sk(s);
278 if (!rosecmp(&rose->source_addr, addr) &&
279 !ax25cmp(&rose->source_call, call) &&
280 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
284 sk_for_each(s, &rose_list) {
285 struct rose_sock *rose = rose_sk(s);
287 if (!rosecmp(&rose->source_addr, addr) &&
288 !ax25cmp(&rose->source_call, &null_ax25_address) &&
289 s->sk_state == TCP_LISTEN)
294 spin_unlock_bh(&rose_list_lock);
299 * Find a connected ROSE socket given my LCI and device.
301 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
305 spin_lock_bh(&rose_list_lock);
306 sk_for_each(s, &rose_list) {
307 struct rose_sock *rose = rose_sk(s);
309 if (rose->lci == lci && rose->neighbour == neigh)
314 spin_unlock_bh(&rose_list_lock);
319 * Find a unique LCI for a given device.
321 unsigned int rose_new_lci(struct rose_neigh *neigh)
325 if (neigh->dce_mode) {
326 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
327 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
330 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
331 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
341 void rose_destroy_socket(struct sock *);
344 * Handler for deferred kills.
346 static void rose_destroy_timer(struct timer_list *t)
348 struct sock *sk = from_timer(sk, t, sk_timer);
350 rose_destroy_socket(sk);
354 * This is called from user mode and the timers. Thus it protects itself
355 * against interrupt users but doesn't worry about being called during
356 * work. Once it is removed from the queue no interrupt or bottom half
357 * will touch it and we are (fairly 8-) ) safe.
359 void rose_destroy_socket(struct sock *sk)
363 rose_remove_socket(sk);
364 rose_stop_heartbeat(sk);
365 rose_stop_idletimer(sk);
368 rose_clear_queues(sk); /* Flush the queues */
370 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
371 if (skb->sk != sk) { /* A pending connection */
372 /* Queue the unaccepted socket for death */
373 sock_set_flag(skb->sk, SOCK_DEAD);
374 rose_start_heartbeat(skb->sk);
375 rose_sk(skb->sk)->state = ROSE_STATE_0;
381 if (sk_has_allocations(sk)) {
382 /* Defer: outstanding buffers */
383 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
384 sk->sk_timer.expires = jiffies + 10 * HZ;
385 add_timer(&sk->sk_timer);
391 * Handling for system calls applied via the various interfaces to a
392 * ROSE socket object.
395 static int rose_setsockopt(struct socket *sock, int level, int optname,
396 sockptr_t optval, unsigned int optlen)
398 struct sock *sk = sock->sk;
399 struct rose_sock *rose = rose_sk(sk);
402 if (level != SOL_ROSE)
405 if (optlen < sizeof(int))
408 if (copy_from_sockptr(&opt, optval, sizeof(int)))
413 rose->defer = opt ? 1 : 0;
443 rose->idle = opt * 60 * HZ;
447 rose->qbitincl = opt ? 1 : 0;
455 static int rose_getsockopt(struct socket *sock, int level, int optname,
456 char __user *optval, int __user *optlen)
458 struct sock *sk = sock->sk;
459 struct rose_sock *rose = rose_sk(sk);
463 if (level != SOL_ROSE)
466 if (get_user(len, optlen))
494 val = rose->idle / (60 * HZ);
498 val = rose->qbitincl;
505 len = min_t(unsigned int, len, sizeof(int));
507 if (put_user(len, optlen))
510 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
513 static int rose_listen(struct socket *sock, int backlog)
515 struct sock *sk = sock->sk;
518 if (sock->state != SS_UNCONNECTED) {
523 if (sk->sk_state != TCP_LISTEN) {
524 struct rose_sock *rose = rose_sk(sk);
526 rose->dest_ndigis = 0;
527 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
528 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
529 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
530 sk->sk_max_ack_backlog = backlog;
531 sk->sk_state = TCP_LISTEN;
540 static struct proto rose_proto = {
542 .owner = THIS_MODULE,
543 .obj_size = sizeof(struct rose_sock),
546 static int rose_create(struct net *net, struct socket *sock, int protocol,
550 struct rose_sock *rose;
552 if (!net_eq(net, &init_net))
553 return -EAFNOSUPPORT;
555 if (sock->type != SOCK_SEQPACKET || protocol != 0)
556 return -ESOCKTNOSUPPORT;
558 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
564 sock_init_data(sock, sk);
566 skb_queue_head_init(&rose->ack_queue);
568 skb_queue_head_init(&rose->frag_queue);
572 sock->ops = &rose_proto_ops;
573 sk->sk_protocol = protocol;
575 timer_setup(&rose->timer, NULL, 0);
576 timer_setup(&rose->idletimer, NULL, 0);
578 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
579 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
580 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
581 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
582 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
584 rose->state = ROSE_STATE_0;
589 static struct sock *rose_make_new(struct sock *osk)
592 struct rose_sock *rose, *orose;
594 if (osk->sk_type != SOCK_SEQPACKET)
597 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
603 sock_init_data(NULL, sk);
605 skb_queue_head_init(&rose->ack_queue);
607 skb_queue_head_init(&rose->frag_queue);
611 sk->sk_type = osk->sk_type;
612 sk->sk_priority = READ_ONCE(osk->sk_priority);
613 sk->sk_protocol = osk->sk_protocol;
614 sk->sk_rcvbuf = osk->sk_rcvbuf;
615 sk->sk_sndbuf = osk->sk_sndbuf;
616 sk->sk_state = TCP_ESTABLISHED;
617 sock_copy_flags(sk, osk);
619 timer_setup(&rose->timer, NULL, 0);
620 timer_setup(&rose->idletimer, NULL, 0);
622 orose = rose_sk(osk);
623 rose->t1 = orose->t1;
624 rose->t2 = orose->t2;
625 rose->t3 = orose->t3;
626 rose->hb = orose->hb;
627 rose->idle = orose->idle;
628 rose->defer = orose->defer;
629 rose->device = orose->device;
631 netdev_hold(rose->device, &rose->dev_tracker, GFP_ATOMIC);
632 rose->qbitincl = orose->qbitincl;
637 static int rose_release(struct socket *sock)
639 struct sock *sk = sock->sk;
640 struct rose_sock *rose;
642 if (sk == NULL) return 0;
649 switch (rose->state) {
652 rose_disconnect(sk, 0, -1, -1);
654 rose_destroy_socket(sk);
658 rose->neighbour->use--;
660 rose_disconnect(sk, 0, -1, -1);
662 rose_destroy_socket(sk);
669 rose_clear_queues(sk);
670 rose_stop_idletimer(sk);
671 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
672 rose_start_t3timer(sk);
673 rose->state = ROSE_STATE_2;
674 sk->sk_state = TCP_CLOSE;
675 sk->sk_shutdown |= SEND_SHUTDOWN;
676 sk->sk_state_change(sk);
677 sock_set_flag(sk, SOCK_DEAD);
678 sock_set_flag(sk, SOCK_DESTROY);
685 spin_lock_bh(&rose_list_lock);
686 netdev_put(rose->device, &rose->dev_tracker);
688 spin_unlock_bh(&rose_list_lock);
696 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
698 struct sock *sk = sock->sk;
699 struct rose_sock *rose = rose_sk(sk);
700 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
701 struct net_device *dev;
702 ax25_address *source;
703 ax25_uid_assoc *user;
706 if (!sock_flag(sk, SOCK_ZAPPED))
709 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
712 if (addr->srose_family != AF_ROSE)
715 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
718 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
721 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
722 return -EADDRNOTAVAIL;
724 source = &addr->srose_call;
726 user = ax25_findbyuid(current_euid());
728 rose->source_call = user->call;
731 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
735 rose->source_call = *source;
738 rose->source_addr = addr->srose_addr;
740 netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL);
741 rose->source_ndigis = addr->srose_ndigis;
743 if (addr_len == sizeof(struct full_sockaddr_rose)) {
744 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
745 for (n = 0 ; n < addr->srose_ndigis ; n++)
746 rose->source_digis[n] = full_addr->srose_digis[n];
748 if (rose->source_ndigis == 1) {
749 rose->source_digis[0] = addr->srose_digi;
753 rose_insert_socket(sk);
755 sock_reset_flag(sk, SOCK_ZAPPED);
760 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
762 struct sock *sk = sock->sk;
763 struct rose_sock *rose = rose_sk(sk);
764 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
765 unsigned char cause, diagnostic;
766 ax25_uid_assoc *user;
769 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
772 if (addr->srose_family != AF_ROSE)
775 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
778 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
781 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
782 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
787 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
788 /* Connect completed during a ERESTARTSYS event */
789 sock->state = SS_CONNECTED;
793 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
794 sock->state = SS_UNCONNECTED;
799 if (sk->sk_state == TCP_ESTABLISHED) {
800 /* No reconnect on a seqpacket socket */
805 sk->sk_state = TCP_CLOSE;
806 sock->state = SS_UNCONNECTED;
808 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
810 if (!rose->neighbour) {
815 rose->lci = rose_new_lci(rose->neighbour);
821 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
822 struct net_device *dev;
824 sock_reset_flag(sk, SOCK_ZAPPED);
826 dev = rose_dev_first();
832 user = ax25_findbyuid(current_euid());
839 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
840 rose->source_call = user->call;
842 netdev_tracker_alloc(rose->device, &rose->dev_tracker,
846 rose_insert_socket(sk); /* Finish the bind */
848 rose->dest_addr = addr->srose_addr;
849 rose->dest_call = addr->srose_call;
850 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
851 rose->dest_ndigis = addr->srose_ndigis;
853 if (addr_len == sizeof(struct full_sockaddr_rose)) {
854 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
855 for (n = 0 ; n < addr->srose_ndigis ; n++)
856 rose->dest_digis[n] = full_addr->srose_digis[n];
858 if (rose->dest_ndigis == 1) {
859 rose->dest_digis[0] = addr->srose_digi;
863 /* Move to connecting socket, start sending Connect Requests */
864 sock->state = SS_CONNECTING;
865 sk->sk_state = TCP_SYN_SENT;
867 rose->state = ROSE_STATE_1;
869 rose->neighbour->use++;
871 rose_write_internal(sk, ROSE_CALL_REQUEST);
872 rose_start_heartbeat(sk);
873 rose_start_t1timer(sk);
876 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
882 * A Connect Ack with Choke or timeout or failed routing will go to
885 if (sk->sk_state == TCP_SYN_SENT) {
889 prepare_to_wait(sk_sleep(sk), &wait,
891 if (sk->sk_state != TCP_SYN_SENT)
893 if (!signal_pending(current)) {
902 finish_wait(sk_sleep(sk), &wait);
908 if (sk->sk_state != TCP_ESTABLISHED) {
909 sock->state = SS_UNCONNECTED;
910 err = sock_error(sk); /* Always set at this point */
914 sock->state = SS_CONNECTED;
922 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
931 if ((sk = sock->sk) == NULL)
935 if (sk->sk_type != SOCK_SEQPACKET) {
940 if (sk->sk_state != TCP_LISTEN) {
946 * The write queue this time is holding sockets ready to use
947 * hooked into the SABM we saved
950 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
952 skb = skb_dequeue(&sk->sk_receive_queue);
956 if (flags & O_NONBLOCK) {
960 if (!signal_pending(current)) {
969 finish_wait(sk_sleep(sk), &wait);
974 sock_graft(newsk, newsock);
976 /* Now attach up the new socket */
979 sk_acceptq_removed(sk);
987 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
990 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
991 struct sock *sk = sock->sk;
992 struct rose_sock *rose = rose_sk(sk);
995 memset(srose, 0, sizeof(*srose));
997 if (sk->sk_state != TCP_ESTABLISHED)
999 srose->srose_family = AF_ROSE;
1000 srose->srose_addr = rose->dest_addr;
1001 srose->srose_call = rose->dest_call;
1002 srose->srose_ndigis = rose->dest_ndigis;
1003 for (n = 0; n < rose->dest_ndigis; n++)
1004 srose->srose_digis[n] = rose->dest_digis[n];
1006 srose->srose_family = AF_ROSE;
1007 srose->srose_addr = rose->source_addr;
1008 srose->srose_call = rose->source_call;
1009 srose->srose_ndigis = rose->source_ndigis;
1010 for (n = 0; n < rose->source_ndigis; n++)
1011 srose->srose_digis[n] = rose->source_digis[n];
1014 return sizeof(struct full_sockaddr_rose);
1017 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
1021 struct rose_sock *make_rose;
1022 struct rose_facilities_struct facilities;
1025 skb->sk = NULL; /* Initially we don't know who it's for */
1028 * skb->data points to the rose frame start
1030 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
1032 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1033 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1035 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1039 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1042 * We can't accept the Call Request.
1044 if (sk == NULL || sk_acceptq_is_full(sk) ||
1045 (make = rose_make_new(sk)) == NULL) {
1046 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1051 make->sk_state = TCP_ESTABLISHED;
1052 make_rose = rose_sk(make);
1054 make_rose->lci = lci;
1055 make_rose->dest_addr = facilities.dest_addr;
1056 make_rose->dest_call = facilities.dest_call;
1057 make_rose->dest_ndigis = facilities.dest_ndigis;
1058 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1059 make_rose->dest_digis[n] = facilities.dest_digis[n];
1060 make_rose->source_addr = facilities.source_addr;
1061 make_rose->source_call = facilities.source_call;
1062 make_rose->source_ndigis = facilities.source_ndigis;
1063 for (n = 0 ; n < facilities.source_ndigis ; n++)
1064 make_rose->source_digis[n] = facilities.source_digis[n];
1065 make_rose->neighbour = neigh;
1066 make_rose->device = dev;
1067 /* Caller got a reference for us. */
1068 netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker,
1070 make_rose->facilities = facilities;
1072 make_rose->neighbour->use++;
1074 if (rose_sk(sk)->defer) {
1075 make_rose->state = ROSE_STATE_5;
1077 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1078 make_rose->state = ROSE_STATE_3;
1079 rose_start_idletimer(make);
1082 make_rose->condition = 0x00;
1087 sk_acceptq_added(sk);
1089 rose_insert_socket(make);
1091 skb_queue_head(&sk->sk_receive_queue, skb);
1093 rose_start_heartbeat(make);
1095 if (!sock_flag(sk, SOCK_DEAD))
1096 sk->sk_data_ready(sk);
1101 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1103 struct sock *sk = sock->sk;
1104 struct rose_sock *rose = rose_sk(sk);
1105 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1107 struct full_sockaddr_rose srose;
1108 struct sk_buff *skb;
1109 unsigned char *asmptr;
1110 int n, size, qbit = 0;
1112 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1115 if (sock_flag(sk, SOCK_ZAPPED))
1116 return -EADDRNOTAVAIL;
1118 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1119 send_sig(SIGPIPE, current, 0);
1123 if (rose->neighbour == NULL || rose->device == NULL)
1124 return -ENETUNREACH;
1126 if (usrose != NULL) {
1127 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1129 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1130 memcpy(&srose, usrose, msg->msg_namelen);
1131 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1132 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1134 if (srose.srose_ndigis != rose->dest_ndigis)
1136 if (srose.srose_ndigis == rose->dest_ndigis) {
1137 for (n = 0 ; n < srose.srose_ndigis ; n++)
1138 if (ax25cmp(&rose->dest_digis[n],
1139 &srose.srose_digis[n]))
1142 if (srose.srose_family != AF_ROSE)
1145 if (sk->sk_state != TCP_ESTABLISHED)
1148 srose.srose_family = AF_ROSE;
1149 srose.srose_addr = rose->dest_addr;
1150 srose.srose_call = rose->dest_call;
1151 srose.srose_ndigis = rose->dest_ndigis;
1152 for (n = 0 ; n < rose->dest_ndigis ; n++)
1153 srose.srose_digis[n] = rose->dest_digis[n];
1156 /* Build a packet */
1157 /* Sanity check the packet size */
1161 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1163 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1166 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1169 * Put the data on the end
1172 skb_reset_transport_header(skb);
1175 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1182 * If the Q BIT Include socket option is in force, the first
1183 * byte of the user data is the logical value of the Q Bit.
1185 if (rose->qbitincl) {
1186 qbit = skb->data[0];
1191 * Push down the ROSE header
1193 asmptr = skb_push(skb, ROSE_MIN_LEN);
1195 /* Build a ROSE Network header */
1196 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1197 asmptr[1] = (rose->lci >> 0) & 0xFF;
1198 asmptr[2] = ROSE_DATA;
1201 asmptr[0] |= ROSE_Q_BIT;
1203 if (sk->sk_state != TCP_ESTABLISHED) {
1209 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1210 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1211 unsigned char header[ROSE_MIN_LEN];
1212 struct sk_buff *skbn;
1216 /* Save a copy of the Header */
1217 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1218 skb_pull(skb, ROSE_MIN_LEN);
1220 frontlen = skb_headroom(skb);
1222 while (skb->len > 0) {
1223 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1232 skb_reserve(skbn, frontlen);
1234 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1236 /* Copy the user data */
1237 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1240 /* Duplicate the Header */
1241 skb_push(skbn, ROSE_MIN_LEN);
1242 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1245 skbn->data[2] |= M_BIT;
1247 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1253 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1256 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1265 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1268 struct sock *sk = sock->sk;
1269 struct rose_sock *rose = rose_sk(sk);
1271 unsigned char *asmptr;
1272 struct sk_buff *skb;
1276 * This works for seqpacket too. The receiver has ordered the queue for
1277 * us! We do one quick check first though
1279 if (sk->sk_state != TCP_ESTABLISHED)
1282 /* Now we can treat all alike */
1283 skb = skb_recv_datagram(sk, flags, &er);
1287 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1289 skb_pull(skb, ROSE_MIN_LEN);
1291 if (rose->qbitincl) {
1292 asmptr = skb_push(skb, 1);
1296 skb_reset_transport_header(skb);
1299 if (copied > size) {
1301 msg->msg_flags |= MSG_TRUNC;
1304 skb_copy_datagram_msg(skb, 0, msg, copied);
1306 if (msg->msg_name) {
1307 struct sockaddr_rose *srose;
1308 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1311 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1312 srose = msg->msg_name;
1313 srose->srose_family = AF_ROSE;
1314 srose->srose_addr = rose->dest_addr;
1315 srose->srose_call = rose->dest_call;
1316 srose->srose_ndigis = rose->dest_ndigis;
1317 for (n = 0 ; n < rose->dest_ndigis ; n++)
1318 full_srose->srose_digis[n] = rose->dest_digis[n];
1319 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1322 skb_free_datagram(sk, skb);
1328 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1330 struct sock *sk = sock->sk;
1331 struct rose_sock *rose = rose_sk(sk);
1332 void __user *argp = (void __user *)arg;
1338 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1341 return put_user(amount, (unsigned int __user *) argp);
1345 struct sk_buff *skb;
1348 spin_lock_irq(&sk->sk_receive_queue.lock);
1349 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1351 spin_unlock_irq(&sk->sk_receive_queue.lock);
1352 return put_user(amount, (unsigned int __user *) argp);
1357 case SIOCGIFDSTADDR:
1358 case SIOCSIFDSTADDR:
1359 case SIOCGIFBRDADDR:
1360 case SIOCSIFBRDADDR:
1361 case SIOCGIFNETMASK:
1362 case SIOCSIFNETMASK:
1370 if (!capable(CAP_NET_ADMIN))
1372 return rose_rt_ioctl(cmd, argp);
1374 case SIOCRSGCAUSE: {
1375 struct rose_cause_struct rose_cause;
1376 rose_cause.cause = rose->cause;
1377 rose_cause.diagnostic = rose->diagnostic;
1378 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1381 case SIOCRSSCAUSE: {
1382 struct rose_cause_struct rose_cause;
1383 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1385 rose->cause = rose_cause.cause;
1386 rose->diagnostic = rose_cause.diagnostic;
1391 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1392 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1393 ax25_listen_release(&rose_callsign, NULL);
1394 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1396 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1397 return ax25_listen_register(&rose_callsign, NULL);
1402 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1405 if (rose->state == ROSE_STATE_5) {
1406 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1407 rose_start_idletimer(sk);
1408 rose->condition = 0x00;
1413 rose->state = ROSE_STATE_3;
1418 return -ENOIOCTLCMD;
1424 #ifdef CONFIG_PROC_FS
1425 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1426 __acquires(rose_list_lock)
1428 spin_lock_bh(&rose_list_lock);
1429 return seq_hlist_start_head(&rose_list, *pos);
1432 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1434 return seq_hlist_next(v, &rose_list, pos);
1437 static void rose_info_stop(struct seq_file *seq, void *v)
1438 __releases(rose_list_lock)
1440 spin_unlock_bh(&rose_list_lock);
1443 static int rose_info_show(struct seq_file *seq, void *v)
1445 char buf[11], rsbuf[11];
1447 if (v == SEQ_START_TOKEN)
1449 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1452 struct sock *s = sk_entry(v);
1453 struct rose_sock *rose = rose_sk(s);
1454 const char *devname, *callsign;
1455 const struct net_device *dev = rose->device;
1460 devname = dev->name;
1462 seq_printf(seq, "%-10s %-9s ",
1463 rose2asc(rsbuf, &rose->dest_addr),
1464 ax2asc(buf, &rose->dest_call));
1466 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1467 callsign = "??????-?";
1469 callsign = ax2asc(buf, &rose->source_call);
1472 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1473 rose2asc(rsbuf, &rose->source_addr),
1477 (rose->neighbour) ? rose->neighbour->number : 0,
1482 ax25_display_timer(&rose->timer) / HZ,
1487 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1488 rose->idle / (60 * HZ),
1489 sk_wmem_alloc_get(s),
1490 sk_rmem_alloc_get(s),
1491 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1497 static const struct seq_operations rose_info_seqops = {
1498 .start = rose_info_start,
1499 .next = rose_info_next,
1500 .stop = rose_info_stop,
1501 .show = rose_info_show,
1503 #endif /* CONFIG_PROC_FS */
1505 static const struct net_proto_family rose_family_ops = {
1507 .create = rose_create,
1508 .owner = THIS_MODULE,
1511 static const struct proto_ops rose_proto_ops = {
1513 .owner = THIS_MODULE,
1514 .release = rose_release,
1516 .connect = rose_connect,
1517 .socketpair = sock_no_socketpair,
1518 .accept = rose_accept,
1519 .getname = rose_getname,
1520 .poll = datagram_poll,
1521 .ioctl = rose_ioctl,
1522 .gettstamp = sock_gettstamp,
1523 .listen = rose_listen,
1524 .shutdown = sock_no_shutdown,
1525 .setsockopt = rose_setsockopt,
1526 .getsockopt = rose_getsockopt,
1527 .sendmsg = rose_sendmsg,
1528 .recvmsg = rose_recvmsg,
1529 .mmap = sock_no_mmap,
1532 static struct notifier_block rose_dev_notifier = {
1533 .notifier_call = rose_device_event,
1536 static struct net_device **dev_rose;
1538 static struct ax25_protocol rose_pid = {
1540 .func = rose_route_frame
1543 static struct ax25_linkfail rose_linkfail_notifier = {
1544 .func = rose_link_failed
1547 static int __init rose_proto_init(void)
1552 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1553 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1558 rc = proto_register(&rose_proto, 0);
1562 rose_callsign = null_ax25_address;
1564 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1566 if (dev_rose == NULL) {
1567 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1569 goto out_proto_unregister;
1572 for (i = 0; i < rose_ndevs; i++) {
1573 struct net_device *dev;
1574 char name[IFNAMSIZ];
1576 sprintf(name, "rose%d", i);
1577 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1579 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1583 rc = register_netdev(dev);
1585 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1589 rose_set_lockdep_key(dev);
1593 sock_register(&rose_family_ops);
1594 register_netdevice_notifier(&rose_dev_notifier);
1596 ax25_register_pid(&rose_pid);
1597 ax25_linkfail_register(&rose_linkfail_notifier);
1599 #ifdef CONFIG_SYSCTL
1600 rose_register_sysctl();
1602 rose_loopback_init();
1604 rose_add_loopback_neigh();
1606 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1607 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1608 &rose_neigh_seqops);
1609 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1611 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1612 &rose_route_seqops);
1617 unregister_netdev(dev_rose[i]);
1618 free_netdev(dev_rose[i]);
1621 out_proto_unregister:
1622 proto_unregister(&rose_proto);
1625 module_init(rose_proto_init);
1627 module_param(rose_ndevs, int, 0);
1628 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1630 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1631 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1632 MODULE_LICENSE("GPL");
1633 MODULE_ALIAS_NETPROTO(PF_ROSE);
1635 static void __exit rose_exit(void)
1639 remove_proc_entry("rose", init_net.proc_net);
1640 remove_proc_entry("rose_neigh", init_net.proc_net);
1641 remove_proc_entry("rose_nodes", init_net.proc_net);
1642 remove_proc_entry("rose_routes", init_net.proc_net);
1643 rose_loopback_clear();
1647 ax25_protocol_release(AX25_P_ROSE);
1648 ax25_linkfail_release(&rose_linkfail_notifier);
1650 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1651 ax25_listen_release(&rose_callsign, NULL);
1653 #ifdef CONFIG_SYSCTL
1654 rose_unregister_sysctl();
1656 unregister_netdevice_notifier(&rose_dev_notifier);
1658 sock_unregister(PF_ROSE);
1660 for (i = 0; i < rose_ndevs; i++) {
1661 struct net_device *dev = dev_rose[i];
1664 unregister_netdev(dev);
1670 proto_unregister(&rose_proto);
1673 module_exit(rose_exit);