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)
187 spin_lock_bh(&rose_list_lock);
188 sk_for_each(s, &rose_list) {
189 struct rose_sock *rose = rose_sk(s);
191 if (rose->device == dev) {
192 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
194 rose->neighbour->use--;
198 spin_unlock_bh(&rose_list_lock);
202 * Handle device status changes.
204 static int rose_device_event(struct notifier_block *this,
205 unsigned long event, void *ptr)
207 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
209 if (!net_eq(dev_net(dev), &init_net))
212 if (event != NETDEV_DOWN)
217 rose_kill_by_device(dev);
220 rose_link_device_down(dev);
221 rose_rt_device_down(dev);
229 * Add a socket to the bound sockets list.
231 static void rose_insert_socket(struct sock *sk)
234 spin_lock_bh(&rose_list_lock);
235 sk_add_node(sk, &rose_list);
236 spin_unlock_bh(&rose_list_lock);
240 * Find a socket that wants to accept the Call Request we just
243 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
247 spin_lock_bh(&rose_list_lock);
248 sk_for_each(s, &rose_list) {
249 struct rose_sock *rose = rose_sk(s);
251 if (!rosecmp(&rose->source_addr, addr) &&
252 !ax25cmp(&rose->source_call, call) &&
253 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
257 sk_for_each(s, &rose_list) {
258 struct rose_sock *rose = rose_sk(s);
260 if (!rosecmp(&rose->source_addr, addr) &&
261 !ax25cmp(&rose->source_call, &null_ax25_address) &&
262 s->sk_state == TCP_LISTEN)
267 spin_unlock_bh(&rose_list_lock);
272 * Find a connected ROSE socket given my LCI and device.
274 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
278 spin_lock_bh(&rose_list_lock);
279 sk_for_each(s, &rose_list) {
280 struct rose_sock *rose = rose_sk(s);
282 if (rose->lci == lci && rose->neighbour == neigh)
287 spin_unlock_bh(&rose_list_lock);
292 * Find a unique LCI for a given device.
294 unsigned int rose_new_lci(struct rose_neigh *neigh)
298 if (neigh->dce_mode) {
299 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
300 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
303 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
304 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
314 void rose_destroy_socket(struct sock *);
317 * Handler for deferred kills.
319 static void rose_destroy_timer(struct timer_list *t)
321 struct sock *sk = from_timer(sk, t, sk_timer);
323 rose_destroy_socket(sk);
327 * This is called from user mode and the timers. Thus it protects itself
328 * against interrupt users but doesn't worry about being called during
329 * work. Once it is removed from the queue no interrupt or bottom half
330 * will touch it and we are (fairly 8-) ) safe.
332 void rose_destroy_socket(struct sock *sk)
336 rose_remove_socket(sk);
337 rose_stop_heartbeat(sk);
338 rose_stop_idletimer(sk);
341 rose_clear_queues(sk); /* Flush the queues */
343 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
344 if (skb->sk != sk) { /* A pending connection */
345 /* Queue the unaccepted socket for death */
346 sock_set_flag(skb->sk, SOCK_DEAD);
347 rose_start_heartbeat(skb->sk);
348 rose_sk(skb->sk)->state = ROSE_STATE_0;
354 if (sk_has_allocations(sk)) {
355 /* Defer: outstanding buffers */
356 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
357 sk->sk_timer.expires = jiffies + 10 * HZ;
358 add_timer(&sk->sk_timer);
364 * Handling for system calls applied via the various interfaces to a
365 * ROSE socket object.
368 static int rose_setsockopt(struct socket *sock, int level, int optname,
369 sockptr_t optval, unsigned int optlen)
371 struct sock *sk = sock->sk;
372 struct rose_sock *rose = rose_sk(sk);
375 if (level != SOL_ROSE)
378 if (optlen < sizeof(int))
381 if (copy_from_sockptr(&opt, optval, sizeof(int)))
386 rose->defer = opt ? 1 : 0;
416 rose->idle = opt * 60 * HZ;
420 rose->qbitincl = opt ? 1 : 0;
428 static int rose_getsockopt(struct socket *sock, int level, int optname,
429 char __user *optval, int __user *optlen)
431 struct sock *sk = sock->sk;
432 struct rose_sock *rose = rose_sk(sk);
436 if (level != SOL_ROSE)
439 if (get_user(len, optlen))
467 val = rose->idle / (60 * HZ);
471 val = rose->qbitincl;
478 len = min_t(unsigned int, len, sizeof(int));
480 if (put_user(len, optlen))
483 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
486 static int rose_listen(struct socket *sock, int backlog)
488 struct sock *sk = sock->sk;
490 if (sk->sk_state != TCP_LISTEN) {
491 struct rose_sock *rose = rose_sk(sk);
493 rose->dest_ndigis = 0;
494 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
495 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
496 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
497 sk->sk_max_ack_backlog = backlog;
498 sk->sk_state = TCP_LISTEN;
505 static struct proto rose_proto = {
507 .owner = THIS_MODULE,
508 .obj_size = sizeof(struct rose_sock),
511 static int rose_create(struct net *net, struct socket *sock, int protocol,
515 struct rose_sock *rose;
517 if (!net_eq(net, &init_net))
518 return -EAFNOSUPPORT;
520 if (sock->type != SOCK_SEQPACKET || protocol != 0)
521 return -ESOCKTNOSUPPORT;
523 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
529 sock_init_data(sock, sk);
531 skb_queue_head_init(&rose->ack_queue);
533 skb_queue_head_init(&rose->frag_queue);
537 sock->ops = &rose_proto_ops;
538 sk->sk_protocol = protocol;
540 timer_setup(&rose->timer, NULL, 0);
541 timer_setup(&rose->idletimer, NULL, 0);
543 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
544 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
545 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
546 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
547 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
549 rose->state = ROSE_STATE_0;
554 static struct sock *rose_make_new(struct sock *osk)
557 struct rose_sock *rose, *orose;
559 if (osk->sk_type != SOCK_SEQPACKET)
562 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
568 sock_init_data(NULL, sk);
570 skb_queue_head_init(&rose->ack_queue);
572 skb_queue_head_init(&rose->frag_queue);
576 sk->sk_type = osk->sk_type;
577 sk->sk_priority = osk->sk_priority;
578 sk->sk_protocol = osk->sk_protocol;
579 sk->sk_rcvbuf = osk->sk_rcvbuf;
580 sk->sk_sndbuf = osk->sk_sndbuf;
581 sk->sk_state = TCP_ESTABLISHED;
582 sock_copy_flags(sk, osk);
584 timer_setup(&rose->timer, NULL, 0);
585 timer_setup(&rose->idletimer, NULL, 0);
587 orose = rose_sk(osk);
588 rose->t1 = orose->t1;
589 rose->t2 = orose->t2;
590 rose->t3 = orose->t3;
591 rose->hb = orose->hb;
592 rose->idle = orose->idle;
593 rose->defer = orose->defer;
594 rose->device = orose->device;
595 rose->qbitincl = orose->qbitincl;
600 static int rose_release(struct socket *sock)
602 struct sock *sk = sock->sk;
603 struct rose_sock *rose;
605 if (sk == NULL) return 0;
612 switch (rose->state) {
615 rose_disconnect(sk, 0, -1, -1);
617 rose_destroy_socket(sk);
621 rose->neighbour->use--;
623 rose_disconnect(sk, 0, -1, -1);
625 rose_destroy_socket(sk);
632 rose_clear_queues(sk);
633 rose_stop_idletimer(sk);
634 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
635 rose_start_t3timer(sk);
636 rose->state = ROSE_STATE_2;
637 sk->sk_state = TCP_CLOSE;
638 sk->sk_shutdown |= SEND_SHUTDOWN;
639 sk->sk_state_change(sk);
640 sock_set_flag(sk, SOCK_DEAD);
641 sock_set_flag(sk, SOCK_DESTROY);
655 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
657 struct sock *sk = sock->sk;
658 struct rose_sock *rose = rose_sk(sk);
659 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
660 struct net_device *dev;
661 ax25_address *source;
662 ax25_uid_assoc *user;
665 if (!sock_flag(sk, SOCK_ZAPPED))
668 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
671 if (addr->srose_family != AF_ROSE)
674 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
677 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
680 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
681 return -EADDRNOTAVAIL;
683 source = &addr->srose_call;
685 user = ax25_findbyuid(current_euid());
687 rose->source_call = user->call;
690 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
694 rose->source_call = *source;
697 rose->source_addr = addr->srose_addr;
699 rose->source_ndigis = addr->srose_ndigis;
701 if (addr_len == sizeof(struct full_sockaddr_rose)) {
702 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
703 for (n = 0 ; n < addr->srose_ndigis ; n++)
704 rose->source_digis[n] = full_addr->srose_digis[n];
706 if (rose->source_ndigis == 1) {
707 rose->source_digis[0] = addr->srose_digi;
711 rose_insert_socket(sk);
713 sock_reset_flag(sk, SOCK_ZAPPED);
718 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
720 struct sock *sk = sock->sk;
721 struct rose_sock *rose = rose_sk(sk);
722 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
723 unsigned char cause, diagnostic;
724 struct net_device *dev;
725 ax25_uid_assoc *user;
728 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
731 if (addr->srose_family != AF_ROSE)
734 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
737 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
740 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
741 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
746 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
747 /* Connect completed during a ERESTARTSYS event */
748 sock->state = SS_CONNECTED;
752 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
753 sock->state = SS_UNCONNECTED;
758 if (sk->sk_state == TCP_ESTABLISHED) {
759 /* No reconnect on a seqpacket socket */
764 sk->sk_state = TCP_CLOSE;
765 sock->state = SS_UNCONNECTED;
767 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
769 if (!rose->neighbour) {
774 rose->lci = rose_new_lci(rose->neighbour);
780 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
781 sock_reset_flag(sk, SOCK_ZAPPED);
783 if ((dev = rose_dev_first()) == NULL) {
788 user = ax25_findbyuid(current_euid());
794 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
795 rose->source_call = user->call;
799 rose_insert_socket(sk); /* Finish the bind */
801 rose->dest_addr = addr->srose_addr;
802 rose->dest_call = addr->srose_call;
803 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
804 rose->dest_ndigis = addr->srose_ndigis;
806 if (addr_len == sizeof(struct full_sockaddr_rose)) {
807 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
808 for (n = 0 ; n < addr->srose_ndigis ; n++)
809 rose->dest_digis[n] = full_addr->srose_digis[n];
811 if (rose->dest_ndigis == 1) {
812 rose->dest_digis[0] = addr->srose_digi;
816 /* Move to connecting socket, start sending Connect Requests */
817 sock->state = SS_CONNECTING;
818 sk->sk_state = TCP_SYN_SENT;
820 rose->state = ROSE_STATE_1;
822 rose->neighbour->use++;
824 rose_write_internal(sk, ROSE_CALL_REQUEST);
825 rose_start_heartbeat(sk);
826 rose_start_t1timer(sk);
829 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
835 * A Connect Ack with Choke or timeout or failed routing will go to
838 if (sk->sk_state == TCP_SYN_SENT) {
842 prepare_to_wait(sk_sleep(sk), &wait,
844 if (sk->sk_state != TCP_SYN_SENT)
846 if (!signal_pending(current)) {
855 finish_wait(sk_sleep(sk), &wait);
861 if (sk->sk_state != TCP_ESTABLISHED) {
862 sock->state = SS_UNCONNECTED;
863 err = sock_error(sk); /* Always set at this point */
867 sock->state = SS_CONNECTED;
875 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
884 if ((sk = sock->sk) == NULL)
888 if (sk->sk_type != SOCK_SEQPACKET) {
893 if (sk->sk_state != TCP_LISTEN) {
899 * The write queue this time is holding sockets ready to use
900 * hooked into the SABM we saved
903 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
905 skb = skb_dequeue(&sk->sk_receive_queue);
909 if (flags & O_NONBLOCK) {
913 if (!signal_pending(current)) {
922 finish_wait(sk_sleep(sk), &wait);
927 sock_graft(newsk, newsock);
929 /* Now attach up the new socket */
932 sk_acceptq_removed(sk);
940 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
943 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
944 struct sock *sk = sock->sk;
945 struct rose_sock *rose = rose_sk(sk);
948 memset(srose, 0, sizeof(*srose));
950 if (sk->sk_state != TCP_ESTABLISHED)
952 srose->srose_family = AF_ROSE;
953 srose->srose_addr = rose->dest_addr;
954 srose->srose_call = rose->dest_call;
955 srose->srose_ndigis = rose->dest_ndigis;
956 for (n = 0; n < rose->dest_ndigis; n++)
957 srose->srose_digis[n] = rose->dest_digis[n];
959 srose->srose_family = AF_ROSE;
960 srose->srose_addr = rose->source_addr;
961 srose->srose_call = rose->source_call;
962 srose->srose_ndigis = rose->source_ndigis;
963 for (n = 0; n < rose->source_ndigis; n++)
964 srose->srose_digis[n] = rose->source_digis[n];
967 return sizeof(struct full_sockaddr_rose);
970 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
974 struct rose_sock *make_rose;
975 struct rose_facilities_struct facilities;
978 skb->sk = NULL; /* Initially we don't know who it's for */
981 * skb->data points to the rose frame start
983 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
985 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
986 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
988 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
992 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
995 * We can't accept the Call Request.
997 if (sk == NULL || sk_acceptq_is_full(sk) ||
998 (make = rose_make_new(sk)) == NULL) {
999 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1004 make->sk_state = TCP_ESTABLISHED;
1005 make_rose = rose_sk(make);
1007 make_rose->lci = lci;
1008 make_rose->dest_addr = facilities.dest_addr;
1009 make_rose->dest_call = facilities.dest_call;
1010 make_rose->dest_ndigis = facilities.dest_ndigis;
1011 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1012 make_rose->dest_digis[n] = facilities.dest_digis[n];
1013 make_rose->source_addr = facilities.source_addr;
1014 make_rose->source_call = facilities.source_call;
1015 make_rose->source_ndigis = facilities.source_ndigis;
1016 for (n = 0 ; n < facilities.source_ndigis ; n++)
1017 make_rose->source_digis[n] = facilities.source_digis[n];
1018 make_rose->neighbour = neigh;
1019 make_rose->device = dev;
1020 make_rose->facilities = facilities;
1022 make_rose->neighbour->use++;
1024 if (rose_sk(sk)->defer) {
1025 make_rose->state = ROSE_STATE_5;
1027 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1028 make_rose->state = ROSE_STATE_3;
1029 rose_start_idletimer(make);
1032 make_rose->condition = 0x00;
1037 sk_acceptq_added(sk);
1039 rose_insert_socket(make);
1041 skb_queue_head(&sk->sk_receive_queue, skb);
1043 rose_start_heartbeat(make);
1045 if (!sock_flag(sk, SOCK_DEAD))
1046 sk->sk_data_ready(sk);
1051 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1053 struct sock *sk = sock->sk;
1054 struct rose_sock *rose = rose_sk(sk);
1055 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1057 struct full_sockaddr_rose srose;
1058 struct sk_buff *skb;
1059 unsigned char *asmptr;
1060 int n, size, qbit = 0;
1062 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1065 if (sock_flag(sk, SOCK_ZAPPED))
1066 return -EADDRNOTAVAIL;
1068 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1069 send_sig(SIGPIPE, current, 0);
1073 if (rose->neighbour == NULL || rose->device == NULL)
1074 return -ENETUNREACH;
1076 if (usrose != NULL) {
1077 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1079 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1080 memcpy(&srose, usrose, msg->msg_namelen);
1081 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1082 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1084 if (srose.srose_ndigis != rose->dest_ndigis)
1086 if (srose.srose_ndigis == rose->dest_ndigis) {
1087 for (n = 0 ; n < srose.srose_ndigis ; n++)
1088 if (ax25cmp(&rose->dest_digis[n],
1089 &srose.srose_digis[n]))
1092 if (srose.srose_family != AF_ROSE)
1095 if (sk->sk_state != TCP_ESTABLISHED)
1098 srose.srose_family = AF_ROSE;
1099 srose.srose_addr = rose->dest_addr;
1100 srose.srose_call = rose->dest_call;
1101 srose.srose_ndigis = rose->dest_ndigis;
1102 for (n = 0 ; n < rose->dest_ndigis ; n++)
1103 srose.srose_digis[n] = rose->dest_digis[n];
1106 /* Build a packet */
1107 /* Sanity check the packet size */
1111 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1113 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1116 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1119 * Put the data on the end
1122 skb_reset_transport_header(skb);
1125 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1132 * If the Q BIT Include socket option is in force, the first
1133 * byte of the user data is the logical value of the Q Bit.
1135 if (rose->qbitincl) {
1136 qbit = skb->data[0];
1141 * Push down the ROSE header
1143 asmptr = skb_push(skb, ROSE_MIN_LEN);
1145 /* Build a ROSE Network header */
1146 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1147 asmptr[1] = (rose->lci >> 0) & 0xFF;
1148 asmptr[2] = ROSE_DATA;
1151 asmptr[0] |= ROSE_Q_BIT;
1153 if (sk->sk_state != TCP_ESTABLISHED) {
1159 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1160 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1161 unsigned char header[ROSE_MIN_LEN];
1162 struct sk_buff *skbn;
1166 /* Save a copy of the Header */
1167 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1168 skb_pull(skb, ROSE_MIN_LEN);
1170 frontlen = skb_headroom(skb);
1172 while (skb->len > 0) {
1173 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1182 skb_reserve(skbn, frontlen);
1184 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1186 /* Copy the user data */
1187 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1190 /* Duplicate the Header */
1191 skb_push(skbn, ROSE_MIN_LEN);
1192 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1195 skbn->data[2] |= M_BIT;
1197 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1203 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1206 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1215 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1218 struct sock *sk = sock->sk;
1219 struct rose_sock *rose = rose_sk(sk);
1221 unsigned char *asmptr;
1222 struct sk_buff *skb;
1226 * This works for seqpacket too. The receiver has ordered the queue for
1227 * us! We do one quick check first though
1229 if (sk->sk_state != TCP_ESTABLISHED)
1232 /* Now we can treat all alike */
1233 skb = skb_recv_datagram(sk, flags, &er);
1237 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1239 skb_pull(skb, ROSE_MIN_LEN);
1241 if (rose->qbitincl) {
1242 asmptr = skb_push(skb, 1);
1246 skb_reset_transport_header(skb);
1249 if (copied > size) {
1251 msg->msg_flags |= MSG_TRUNC;
1254 skb_copy_datagram_msg(skb, 0, msg, copied);
1256 if (msg->msg_name) {
1257 struct sockaddr_rose *srose;
1258 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1261 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1262 srose = msg->msg_name;
1263 srose->srose_family = AF_ROSE;
1264 srose->srose_addr = rose->dest_addr;
1265 srose->srose_call = rose->dest_call;
1266 srose->srose_ndigis = rose->dest_ndigis;
1267 for (n = 0 ; n < rose->dest_ndigis ; n++)
1268 full_srose->srose_digis[n] = rose->dest_digis[n];
1269 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1272 skb_free_datagram(sk, skb);
1278 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1280 struct sock *sk = sock->sk;
1281 struct rose_sock *rose = rose_sk(sk);
1282 void __user *argp = (void __user *)arg;
1288 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1291 return put_user(amount, (unsigned int __user *) argp);
1295 struct sk_buff *skb;
1297 /* These two are safe on a single CPU system as only user tasks fiddle here */
1298 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1300 return put_user(amount, (unsigned int __user *) argp);
1305 case SIOCGIFDSTADDR:
1306 case SIOCSIFDSTADDR:
1307 case SIOCGIFBRDADDR:
1308 case SIOCSIFBRDADDR:
1309 case SIOCGIFNETMASK:
1310 case SIOCSIFNETMASK:
1318 if (!capable(CAP_NET_ADMIN))
1320 return rose_rt_ioctl(cmd, argp);
1322 case SIOCRSGCAUSE: {
1323 struct rose_cause_struct rose_cause;
1324 rose_cause.cause = rose->cause;
1325 rose_cause.diagnostic = rose->diagnostic;
1326 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1329 case SIOCRSSCAUSE: {
1330 struct rose_cause_struct rose_cause;
1331 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1333 rose->cause = rose_cause.cause;
1334 rose->diagnostic = rose_cause.diagnostic;
1339 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1340 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1341 ax25_listen_release(&rose_callsign, NULL);
1342 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1344 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1345 return ax25_listen_register(&rose_callsign, NULL);
1350 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1353 if (rose->state == ROSE_STATE_5) {
1354 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1355 rose_start_idletimer(sk);
1356 rose->condition = 0x00;
1361 rose->state = ROSE_STATE_3;
1366 return -ENOIOCTLCMD;
1372 #ifdef CONFIG_PROC_FS
1373 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1374 __acquires(rose_list_lock)
1376 spin_lock_bh(&rose_list_lock);
1377 return seq_hlist_start_head(&rose_list, *pos);
1380 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1382 return seq_hlist_next(v, &rose_list, pos);
1385 static void rose_info_stop(struct seq_file *seq, void *v)
1386 __releases(rose_list_lock)
1388 spin_unlock_bh(&rose_list_lock);
1391 static int rose_info_show(struct seq_file *seq, void *v)
1393 char buf[11], rsbuf[11];
1395 if (v == SEQ_START_TOKEN)
1397 "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");
1400 struct sock *s = sk_entry(v);
1401 struct rose_sock *rose = rose_sk(s);
1402 const char *devname, *callsign;
1403 const struct net_device *dev = rose->device;
1408 devname = dev->name;
1410 seq_printf(seq, "%-10s %-9s ",
1411 rose2asc(rsbuf, &rose->dest_addr),
1412 ax2asc(buf, &rose->dest_call));
1414 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1415 callsign = "??????-?";
1417 callsign = ax2asc(buf, &rose->source_call);
1420 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1421 rose2asc(rsbuf, &rose->source_addr),
1425 (rose->neighbour) ? rose->neighbour->number : 0,
1430 ax25_display_timer(&rose->timer) / HZ,
1435 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1436 rose->idle / (60 * HZ),
1437 sk_wmem_alloc_get(s),
1438 sk_rmem_alloc_get(s),
1439 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1445 static const struct seq_operations rose_info_seqops = {
1446 .start = rose_info_start,
1447 .next = rose_info_next,
1448 .stop = rose_info_stop,
1449 .show = rose_info_show,
1451 #endif /* CONFIG_PROC_FS */
1453 static const struct net_proto_family rose_family_ops = {
1455 .create = rose_create,
1456 .owner = THIS_MODULE,
1459 static const struct proto_ops rose_proto_ops = {
1461 .owner = THIS_MODULE,
1462 .release = rose_release,
1464 .connect = rose_connect,
1465 .socketpair = sock_no_socketpair,
1466 .accept = rose_accept,
1467 .getname = rose_getname,
1468 .poll = datagram_poll,
1469 .ioctl = rose_ioctl,
1470 .gettstamp = sock_gettstamp,
1471 .listen = rose_listen,
1472 .shutdown = sock_no_shutdown,
1473 .setsockopt = rose_setsockopt,
1474 .getsockopt = rose_getsockopt,
1475 .sendmsg = rose_sendmsg,
1476 .recvmsg = rose_recvmsg,
1477 .mmap = sock_no_mmap,
1478 .sendpage = sock_no_sendpage,
1481 static struct notifier_block rose_dev_notifier = {
1482 .notifier_call = rose_device_event,
1485 static struct net_device **dev_rose;
1487 static struct ax25_protocol rose_pid = {
1489 .func = rose_route_frame
1492 static struct ax25_linkfail rose_linkfail_notifier = {
1493 .func = rose_link_failed
1496 static int __init rose_proto_init(void)
1501 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1502 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1507 rc = proto_register(&rose_proto, 0);
1511 rose_callsign = null_ax25_address;
1513 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1515 if (dev_rose == NULL) {
1516 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1518 goto out_proto_unregister;
1521 for (i = 0; i < rose_ndevs; i++) {
1522 struct net_device *dev;
1523 char name[IFNAMSIZ];
1525 sprintf(name, "rose%d", i);
1526 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1528 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1532 rc = register_netdev(dev);
1534 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1538 rose_set_lockdep_key(dev);
1542 sock_register(&rose_family_ops);
1543 register_netdevice_notifier(&rose_dev_notifier);
1545 ax25_register_pid(&rose_pid);
1546 ax25_linkfail_register(&rose_linkfail_notifier);
1548 #ifdef CONFIG_SYSCTL
1549 rose_register_sysctl();
1551 rose_loopback_init();
1553 rose_add_loopback_neigh();
1555 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1556 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1557 &rose_neigh_seqops);
1558 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1560 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1561 &rose_route_seqops);
1566 unregister_netdev(dev_rose[i]);
1567 free_netdev(dev_rose[i]);
1570 out_proto_unregister:
1571 proto_unregister(&rose_proto);
1574 module_init(rose_proto_init);
1576 module_param(rose_ndevs, int, 0);
1577 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1579 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1580 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1581 MODULE_LICENSE("GPL");
1582 MODULE_ALIAS_NETPROTO(PF_ROSE);
1584 static void __exit rose_exit(void)
1588 remove_proc_entry("rose", init_net.proc_net);
1589 remove_proc_entry("rose_neigh", init_net.proc_net);
1590 remove_proc_entry("rose_nodes", init_net.proc_net);
1591 remove_proc_entry("rose_routes", init_net.proc_net);
1592 rose_loopback_clear();
1596 ax25_protocol_release(AX25_P_ROSE);
1597 ax25_linkfail_release(&rose_linkfail_notifier);
1599 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1600 ax25_listen_release(&rose_callsign, NULL);
1602 #ifdef CONFIG_SYSCTL
1603 rose_unregister_sysctl();
1605 unregister_netdevice_notifier(&rose_dev_notifier);
1607 sock_unregister(PF_ROSE);
1609 for (i = 0; i < rose_ndevs; i++) {
1610 struct net_device *dev = dev_rose[i];
1613 unregister_netdev(dev);
1619 proto_unregister(&rose_proto);
1622 module_exit(rose_exit);