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;
75 static void rose_set_lockdep_one(struct net_device *dev,
76 struct netdev_queue *txq,
79 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
82 static void rose_set_lockdep_key(struct net_device *dev)
84 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
88 * Convert a ROSE address into text.
90 char *rose2asc(char *buf, const rose_address *addr)
92 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
93 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
94 addr->rose_addr[4] == 0x00) {
97 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
98 addr->rose_addr[1] & 0xFF,
99 addr->rose_addr[2] & 0xFF,
100 addr->rose_addr[3] & 0xFF,
101 addr->rose_addr[4] & 0xFF);
108 * Compare two ROSE addresses, 0 == equal.
110 int rosecmp(rose_address *addr1, rose_address *addr2)
114 for (i = 0; i < 5; i++)
115 if (addr1->rose_addr[i] != addr2->rose_addr[i])
122 * Compare two ROSE addresses for only mask digits, 0 == equal.
124 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
131 for (i = 0; i < mask; i++) {
135 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
138 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
147 * Socket removal during an interrupt is now safe.
149 static void rose_remove_socket(struct sock *sk)
151 spin_lock_bh(&rose_list_lock);
152 sk_del_node_init(sk);
153 spin_unlock_bh(&rose_list_lock);
157 * Kill all bound sockets on a broken link layer connection to a
158 * particular neighbour.
160 void rose_kill_by_neigh(struct rose_neigh *neigh)
164 spin_lock_bh(&rose_list_lock);
165 sk_for_each(s, &rose_list) {
166 struct rose_sock *rose = rose_sk(s);
168 if (rose->neighbour == neigh) {
169 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
170 rose->neighbour->use--;
171 rose->neighbour = NULL;
174 spin_unlock_bh(&rose_list_lock);
178 * Kill all bound sockets on a dropped device.
180 static void rose_kill_by_device(struct net_device *dev)
184 spin_lock_bh(&rose_list_lock);
185 sk_for_each(s, &rose_list) {
186 struct rose_sock *rose = rose_sk(s);
188 if (rose->device == dev) {
189 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
191 rose->neighbour->use--;
195 spin_unlock_bh(&rose_list_lock);
199 * Handle device status changes.
201 static int rose_device_event(struct notifier_block *this,
202 unsigned long event, void *ptr)
204 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
206 if (!net_eq(dev_net(dev), &init_net))
209 if (event != NETDEV_DOWN)
214 rose_kill_by_device(dev);
217 rose_link_device_down(dev);
218 rose_rt_device_down(dev);
226 * Add a socket to the bound sockets list.
228 static void rose_insert_socket(struct sock *sk)
231 spin_lock_bh(&rose_list_lock);
232 sk_add_node(sk, &rose_list);
233 spin_unlock_bh(&rose_list_lock);
237 * Find a socket that wants to accept the Call Request we just
240 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
244 spin_lock_bh(&rose_list_lock);
245 sk_for_each(s, &rose_list) {
246 struct rose_sock *rose = rose_sk(s);
248 if (!rosecmp(&rose->source_addr, addr) &&
249 !ax25cmp(&rose->source_call, call) &&
250 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
254 sk_for_each(s, &rose_list) {
255 struct rose_sock *rose = rose_sk(s);
257 if (!rosecmp(&rose->source_addr, addr) &&
258 !ax25cmp(&rose->source_call, &null_ax25_address) &&
259 s->sk_state == TCP_LISTEN)
264 spin_unlock_bh(&rose_list_lock);
269 * Find a connected ROSE socket given my LCI and device.
271 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
275 spin_lock_bh(&rose_list_lock);
276 sk_for_each(s, &rose_list) {
277 struct rose_sock *rose = rose_sk(s);
279 if (rose->lci == lci && rose->neighbour == neigh)
284 spin_unlock_bh(&rose_list_lock);
289 * Find a unique LCI for a given device.
291 unsigned int rose_new_lci(struct rose_neigh *neigh)
295 if (neigh->dce_mode) {
296 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
297 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
300 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
301 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
311 void rose_destroy_socket(struct sock *);
314 * Handler for deferred kills.
316 static void rose_destroy_timer(struct timer_list *t)
318 struct sock *sk = from_timer(sk, t, sk_timer);
320 rose_destroy_socket(sk);
324 * This is called from user mode and the timers. Thus it protects itself
325 * against interrupt users but doesn't worry about being called during
326 * work. Once it is removed from the queue no interrupt or bottom half
327 * will touch it and we are (fairly 8-) ) safe.
329 void rose_destroy_socket(struct sock *sk)
333 rose_remove_socket(sk);
334 rose_stop_heartbeat(sk);
335 rose_stop_idletimer(sk);
338 rose_clear_queues(sk); /* Flush the queues */
340 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
341 if (skb->sk != sk) { /* A pending connection */
342 /* Queue the unaccepted socket for death */
343 sock_set_flag(skb->sk, SOCK_DEAD);
344 rose_start_heartbeat(skb->sk);
345 rose_sk(skb->sk)->state = ROSE_STATE_0;
351 if (sk_has_allocations(sk)) {
352 /* Defer: outstanding buffers */
353 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
354 sk->sk_timer.expires = jiffies + 10 * HZ;
355 add_timer(&sk->sk_timer);
361 * Handling for system calls applied via the various interfaces to a
362 * ROSE socket object.
365 static int rose_setsockopt(struct socket *sock, int level, int optname,
366 char __user *optval, unsigned int optlen)
368 struct sock *sk = sock->sk;
369 struct rose_sock *rose = rose_sk(sk);
372 if (level != SOL_ROSE)
375 if (optlen < sizeof(int))
378 if (get_user(opt, (int __user *)optval))
383 rose->defer = opt ? 1 : 0;
413 rose->idle = opt * 60 * HZ;
417 rose->qbitincl = opt ? 1 : 0;
425 static int rose_getsockopt(struct socket *sock, int level, int optname,
426 char __user *optval, int __user *optlen)
428 struct sock *sk = sock->sk;
429 struct rose_sock *rose = rose_sk(sk);
433 if (level != SOL_ROSE)
436 if (get_user(len, optlen))
464 val = rose->idle / (60 * HZ);
468 val = rose->qbitincl;
475 len = min_t(unsigned int, len, sizeof(int));
477 if (put_user(len, optlen))
480 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
483 static int rose_listen(struct socket *sock, int backlog)
485 struct sock *sk = sock->sk;
487 if (sk->sk_state != TCP_LISTEN) {
488 struct rose_sock *rose = rose_sk(sk);
490 rose->dest_ndigis = 0;
491 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
492 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
493 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
494 sk->sk_max_ack_backlog = backlog;
495 sk->sk_state = TCP_LISTEN;
502 static struct proto rose_proto = {
504 .owner = THIS_MODULE,
505 .obj_size = sizeof(struct rose_sock),
508 static int rose_create(struct net *net, struct socket *sock, int protocol,
512 struct rose_sock *rose;
514 if (!net_eq(net, &init_net))
515 return -EAFNOSUPPORT;
517 if (sock->type != SOCK_SEQPACKET || protocol != 0)
518 return -ESOCKTNOSUPPORT;
520 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
526 sock_init_data(sock, sk);
528 skb_queue_head_init(&rose->ack_queue);
530 skb_queue_head_init(&rose->frag_queue);
534 sock->ops = &rose_proto_ops;
535 sk->sk_protocol = protocol;
537 timer_setup(&rose->timer, NULL, 0);
538 timer_setup(&rose->idletimer, NULL, 0);
540 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
541 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
542 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
543 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
544 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
546 rose->state = ROSE_STATE_0;
551 static struct sock *rose_make_new(struct sock *osk)
554 struct rose_sock *rose, *orose;
556 if (osk->sk_type != SOCK_SEQPACKET)
559 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
565 sock_init_data(NULL, sk);
567 skb_queue_head_init(&rose->ack_queue);
569 skb_queue_head_init(&rose->frag_queue);
573 sk->sk_type = osk->sk_type;
574 sk->sk_priority = osk->sk_priority;
575 sk->sk_protocol = osk->sk_protocol;
576 sk->sk_rcvbuf = osk->sk_rcvbuf;
577 sk->sk_sndbuf = osk->sk_sndbuf;
578 sk->sk_state = TCP_ESTABLISHED;
579 sock_copy_flags(sk, osk);
581 timer_setup(&rose->timer, NULL, 0);
582 timer_setup(&rose->idletimer, NULL, 0);
584 orose = rose_sk(osk);
585 rose->t1 = orose->t1;
586 rose->t2 = orose->t2;
587 rose->t3 = orose->t3;
588 rose->hb = orose->hb;
589 rose->idle = orose->idle;
590 rose->defer = orose->defer;
591 rose->device = orose->device;
592 rose->qbitincl = orose->qbitincl;
597 static int rose_release(struct socket *sock)
599 struct sock *sk = sock->sk;
600 struct rose_sock *rose;
602 if (sk == NULL) return 0;
609 switch (rose->state) {
612 rose_disconnect(sk, 0, -1, -1);
614 rose_destroy_socket(sk);
618 rose->neighbour->use--;
620 rose_disconnect(sk, 0, -1, -1);
622 rose_destroy_socket(sk);
629 rose_clear_queues(sk);
630 rose_stop_idletimer(sk);
631 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
632 rose_start_t3timer(sk);
633 rose->state = ROSE_STATE_2;
634 sk->sk_state = TCP_CLOSE;
635 sk->sk_shutdown |= SEND_SHUTDOWN;
636 sk->sk_state_change(sk);
637 sock_set_flag(sk, SOCK_DEAD);
638 sock_set_flag(sk, SOCK_DESTROY);
652 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
654 struct sock *sk = sock->sk;
655 struct rose_sock *rose = rose_sk(sk);
656 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
657 struct net_device *dev;
658 ax25_address *source;
659 ax25_uid_assoc *user;
662 if (!sock_flag(sk, SOCK_ZAPPED))
665 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
668 if (addr->srose_family != AF_ROSE)
671 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
674 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
677 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
678 return -EADDRNOTAVAIL;
680 source = &addr->srose_call;
682 user = ax25_findbyuid(current_euid());
684 rose->source_call = user->call;
687 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
691 rose->source_call = *source;
694 rose->source_addr = addr->srose_addr;
696 rose->source_ndigis = addr->srose_ndigis;
698 if (addr_len == sizeof(struct full_sockaddr_rose)) {
699 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
700 for (n = 0 ; n < addr->srose_ndigis ; n++)
701 rose->source_digis[n] = full_addr->srose_digis[n];
703 if (rose->source_ndigis == 1) {
704 rose->source_digis[0] = addr->srose_digi;
708 rose_insert_socket(sk);
710 sock_reset_flag(sk, SOCK_ZAPPED);
715 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
717 struct sock *sk = sock->sk;
718 struct rose_sock *rose = rose_sk(sk);
719 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
720 unsigned char cause, diagnostic;
721 struct net_device *dev;
722 ax25_uid_assoc *user;
725 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
728 if (addr->srose_family != AF_ROSE)
731 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
734 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
737 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
738 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
743 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
744 /* Connect completed during a ERESTARTSYS event */
745 sock->state = SS_CONNECTED;
749 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
750 sock->state = SS_UNCONNECTED;
755 if (sk->sk_state == TCP_ESTABLISHED) {
756 /* No reconnect on a seqpacket socket */
761 sk->sk_state = TCP_CLOSE;
762 sock->state = SS_UNCONNECTED;
764 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
766 if (!rose->neighbour) {
771 rose->lci = rose_new_lci(rose->neighbour);
777 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
778 sock_reset_flag(sk, SOCK_ZAPPED);
780 if ((dev = rose_dev_first()) == NULL) {
785 user = ax25_findbyuid(current_euid());
791 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
792 rose->source_call = user->call;
796 rose_insert_socket(sk); /* Finish the bind */
798 rose->dest_addr = addr->srose_addr;
799 rose->dest_call = addr->srose_call;
800 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
801 rose->dest_ndigis = addr->srose_ndigis;
803 if (addr_len == sizeof(struct full_sockaddr_rose)) {
804 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
805 for (n = 0 ; n < addr->srose_ndigis ; n++)
806 rose->dest_digis[n] = full_addr->srose_digis[n];
808 if (rose->dest_ndigis == 1) {
809 rose->dest_digis[0] = addr->srose_digi;
813 /* Move to connecting socket, start sending Connect Requests */
814 sock->state = SS_CONNECTING;
815 sk->sk_state = TCP_SYN_SENT;
817 rose->state = ROSE_STATE_1;
819 rose->neighbour->use++;
821 rose_write_internal(sk, ROSE_CALL_REQUEST);
822 rose_start_heartbeat(sk);
823 rose_start_t1timer(sk);
826 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
832 * A Connect Ack with Choke or timeout or failed routing will go to
835 if (sk->sk_state == TCP_SYN_SENT) {
839 prepare_to_wait(sk_sleep(sk), &wait,
841 if (sk->sk_state != TCP_SYN_SENT)
843 if (!signal_pending(current)) {
852 finish_wait(sk_sleep(sk), &wait);
858 if (sk->sk_state != TCP_ESTABLISHED) {
859 sock->state = SS_UNCONNECTED;
860 err = sock_error(sk); /* Always set at this point */
864 sock->state = SS_CONNECTED;
872 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
881 if ((sk = sock->sk) == NULL)
885 if (sk->sk_type != SOCK_SEQPACKET) {
890 if (sk->sk_state != TCP_LISTEN) {
896 * The write queue this time is holding sockets ready to use
897 * hooked into the SABM we saved
900 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
902 skb = skb_dequeue(&sk->sk_receive_queue);
906 if (flags & O_NONBLOCK) {
910 if (!signal_pending(current)) {
919 finish_wait(sk_sleep(sk), &wait);
924 sock_graft(newsk, newsock);
926 /* Now attach up the new socket */
929 sk_acceptq_removed(sk);
937 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
940 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
941 struct sock *sk = sock->sk;
942 struct rose_sock *rose = rose_sk(sk);
945 memset(srose, 0, sizeof(*srose));
947 if (sk->sk_state != TCP_ESTABLISHED)
949 srose->srose_family = AF_ROSE;
950 srose->srose_addr = rose->dest_addr;
951 srose->srose_call = rose->dest_call;
952 srose->srose_ndigis = rose->dest_ndigis;
953 for (n = 0; n < rose->dest_ndigis; n++)
954 srose->srose_digis[n] = rose->dest_digis[n];
956 srose->srose_family = AF_ROSE;
957 srose->srose_addr = rose->source_addr;
958 srose->srose_call = rose->source_call;
959 srose->srose_ndigis = rose->source_ndigis;
960 for (n = 0; n < rose->source_ndigis; n++)
961 srose->srose_digis[n] = rose->source_digis[n];
964 return sizeof(struct full_sockaddr_rose);
967 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
971 struct rose_sock *make_rose;
972 struct rose_facilities_struct facilities;
975 skb->sk = NULL; /* Initially we don't know who it's for */
978 * skb->data points to the rose frame start
980 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
982 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
983 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
985 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
989 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
992 * We can't accept the Call Request.
994 if (sk == NULL || sk_acceptq_is_full(sk) ||
995 (make = rose_make_new(sk)) == NULL) {
996 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1001 make->sk_state = TCP_ESTABLISHED;
1002 make_rose = rose_sk(make);
1004 make_rose->lci = lci;
1005 make_rose->dest_addr = facilities.dest_addr;
1006 make_rose->dest_call = facilities.dest_call;
1007 make_rose->dest_ndigis = facilities.dest_ndigis;
1008 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1009 make_rose->dest_digis[n] = facilities.dest_digis[n];
1010 make_rose->source_addr = facilities.source_addr;
1011 make_rose->source_call = facilities.source_call;
1012 make_rose->source_ndigis = facilities.source_ndigis;
1013 for (n = 0 ; n < facilities.source_ndigis ; n++)
1014 make_rose->source_digis[n] = facilities.source_digis[n];
1015 make_rose->neighbour = neigh;
1016 make_rose->device = dev;
1017 make_rose->facilities = facilities;
1019 make_rose->neighbour->use++;
1021 if (rose_sk(sk)->defer) {
1022 make_rose->state = ROSE_STATE_5;
1024 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1025 make_rose->state = ROSE_STATE_3;
1026 rose_start_idletimer(make);
1029 make_rose->condition = 0x00;
1034 sk_acceptq_added(sk);
1036 rose_insert_socket(make);
1038 skb_queue_head(&sk->sk_receive_queue, skb);
1040 rose_start_heartbeat(make);
1042 if (!sock_flag(sk, SOCK_DEAD))
1043 sk->sk_data_ready(sk);
1048 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1050 struct sock *sk = sock->sk;
1051 struct rose_sock *rose = rose_sk(sk);
1052 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1054 struct full_sockaddr_rose srose;
1055 struct sk_buff *skb;
1056 unsigned char *asmptr;
1057 int n, size, qbit = 0;
1059 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062 if (sock_flag(sk, SOCK_ZAPPED))
1063 return -EADDRNOTAVAIL;
1065 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1066 send_sig(SIGPIPE, current, 0);
1070 if (rose->neighbour == NULL || rose->device == NULL)
1071 return -ENETUNREACH;
1073 if (usrose != NULL) {
1074 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1076 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1077 memcpy(&srose, usrose, msg->msg_namelen);
1078 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1079 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1081 if (srose.srose_ndigis != rose->dest_ndigis)
1083 if (srose.srose_ndigis == rose->dest_ndigis) {
1084 for (n = 0 ; n < srose.srose_ndigis ; n++)
1085 if (ax25cmp(&rose->dest_digis[n],
1086 &srose.srose_digis[n]))
1089 if (srose.srose_family != AF_ROSE)
1092 if (sk->sk_state != TCP_ESTABLISHED)
1095 srose.srose_family = AF_ROSE;
1096 srose.srose_addr = rose->dest_addr;
1097 srose.srose_call = rose->dest_call;
1098 srose.srose_ndigis = rose->dest_ndigis;
1099 for (n = 0 ; n < rose->dest_ndigis ; n++)
1100 srose.srose_digis[n] = rose->dest_digis[n];
1103 /* Build a packet */
1104 /* Sanity check the packet size */
1108 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1110 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1113 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1116 * Put the data on the end
1119 skb_reset_transport_header(skb);
1122 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1129 * If the Q BIT Include socket option is in force, the first
1130 * byte of the user data is the logical value of the Q Bit.
1132 if (rose->qbitincl) {
1133 qbit = skb->data[0];
1138 * Push down the ROSE header
1140 asmptr = skb_push(skb, ROSE_MIN_LEN);
1142 /* Build a ROSE Network header */
1143 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1144 asmptr[1] = (rose->lci >> 0) & 0xFF;
1145 asmptr[2] = ROSE_DATA;
1148 asmptr[0] |= ROSE_Q_BIT;
1150 if (sk->sk_state != TCP_ESTABLISHED) {
1156 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1157 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1158 unsigned char header[ROSE_MIN_LEN];
1159 struct sk_buff *skbn;
1163 /* Save a copy of the Header */
1164 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1165 skb_pull(skb, ROSE_MIN_LEN);
1167 frontlen = skb_headroom(skb);
1169 while (skb->len > 0) {
1170 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1179 skb_reserve(skbn, frontlen);
1181 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1183 /* Copy the user data */
1184 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1187 /* Duplicate the Header */
1188 skb_push(skbn, ROSE_MIN_LEN);
1189 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1192 skbn->data[2] |= M_BIT;
1194 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1200 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1203 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1212 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1215 struct sock *sk = sock->sk;
1216 struct rose_sock *rose = rose_sk(sk);
1218 unsigned char *asmptr;
1219 struct sk_buff *skb;
1223 * This works for seqpacket too. The receiver has ordered the queue for
1224 * us! We do one quick check first though
1226 if (sk->sk_state != TCP_ESTABLISHED)
1229 /* Now we can treat all alike */
1230 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1235 skb_pull(skb, ROSE_MIN_LEN);
1237 if (rose->qbitincl) {
1238 asmptr = skb_push(skb, 1);
1242 skb_reset_transport_header(skb);
1245 if (copied > size) {
1247 msg->msg_flags |= MSG_TRUNC;
1250 skb_copy_datagram_msg(skb, 0, msg, copied);
1252 if (msg->msg_name) {
1253 struct sockaddr_rose *srose;
1254 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1257 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1258 srose = msg->msg_name;
1259 srose->srose_family = AF_ROSE;
1260 srose->srose_addr = rose->dest_addr;
1261 srose->srose_call = rose->dest_call;
1262 srose->srose_ndigis = rose->dest_ndigis;
1263 for (n = 0 ; n < rose->dest_ndigis ; n++)
1264 full_srose->srose_digis[n] = rose->dest_digis[n];
1265 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1268 skb_free_datagram(sk, skb);
1274 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1276 struct sock *sk = sock->sk;
1277 struct rose_sock *rose = rose_sk(sk);
1278 void __user *argp = (void __user *)arg;
1284 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1287 return put_user(amount, (unsigned int __user *) argp);
1291 struct sk_buff *skb;
1293 /* These two are safe on a single CPU system as only user tasks fiddle here */
1294 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1296 return put_user(amount, (unsigned int __user *) argp);
1301 case SIOCGIFDSTADDR:
1302 case SIOCSIFDSTADDR:
1303 case SIOCGIFBRDADDR:
1304 case SIOCSIFBRDADDR:
1305 case SIOCGIFNETMASK:
1306 case SIOCSIFNETMASK:
1314 if (!capable(CAP_NET_ADMIN))
1316 return rose_rt_ioctl(cmd, argp);
1318 case SIOCRSGCAUSE: {
1319 struct rose_cause_struct rose_cause;
1320 rose_cause.cause = rose->cause;
1321 rose_cause.diagnostic = rose->diagnostic;
1322 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1325 case SIOCRSSCAUSE: {
1326 struct rose_cause_struct rose_cause;
1327 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1329 rose->cause = rose_cause.cause;
1330 rose->diagnostic = rose_cause.diagnostic;
1335 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1336 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1337 ax25_listen_release(&rose_callsign, NULL);
1338 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1340 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1341 return ax25_listen_register(&rose_callsign, NULL);
1346 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1349 if (rose->state == ROSE_STATE_5) {
1350 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1351 rose_start_idletimer(sk);
1352 rose->condition = 0x00;
1357 rose->state = ROSE_STATE_3;
1362 return -ENOIOCTLCMD;
1368 #ifdef CONFIG_PROC_FS
1369 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1370 __acquires(rose_list_lock)
1372 spin_lock_bh(&rose_list_lock);
1373 return seq_hlist_start_head(&rose_list, *pos);
1376 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1378 return seq_hlist_next(v, &rose_list, pos);
1381 static void rose_info_stop(struct seq_file *seq, void *v)
1382 __releases(rose_list_lock)
1384 spin_unlock_bh(&rose_list_lock);
1387 static int rose_info_show(struct seq_file *seq, void *v)
1389 char buf[11], rsbuf[11];
1391 if (v == SEQ_START_TOKEN)
1393 "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");
1396 struct sock *s = sk_entry(v);
1397 struct rose_sock *rose = rose_sk(s);
1398 const char *devname, *callsign;
1399 const struct net_device *dev = rose->device;
1404 devname = dev->name;
1406 seq_printf(seq, "%-10s %-9s ",
1407 rose2asc(rsbuf, &rose->dest_addr),
1408 ax2asc(buf, &rose->dest_call));
1410 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1411 callsign = "??????-?";
1413 callsign = ax2asc(buf, &rose->source_call);
1416 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1417 rose2asc(rsbuf, &rose->source_addr),
1421 (rose->neighbour) ? rose->neighbour->number : 0,
1426 ax25_display_timer(&rose->timer) / HZ,
1431 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1432 rose->idle / (60 * HZ),
1433 sk_wmem_alloc_get(s),
1434 sk_rmem_alloc_get(s),
1435 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1441 static const struct seq_operations rose_info_seqops = {
1442 .start = rose_info_start,
1443 .next = rose_info_next,
1444 .stop = rose_info_stop,
1445 .show = rose_info_show,
1447 #endif /* CONFIG_PROC_FS */
1449 static const struct net_proto_family rose_family_ops = {
1451 .create = rose_create,
1452 .owner = THIS_MODULE,
1455 static const struct proto_ops rose_proto_ops = {
1457 .owner = THIS_MODULE,
1458 .release = rose_release,
1460 .connect = rose_connect,
1461 .socketpair = sock_no_socketpair,
1462 .accept = rose_accept,
1463 .getname = rose_getname,
1464 .poll = datagram_poll,
1465 .ioctl = rose_ioctl,
1466 .gettstamp = sock_gettstamp,
1467 .listen = rose_listen,
1468 .shutdown = sock_no_shutdown,
1469 .setsockopt = rose_setsockopt,
1470 .getsockopt = rose_getsockopt,
1471 .sendmsg = rose_sendmsg,
1472 .recvmsg = rose_recvmsg,
1473 .mmap = sock_no_mmap,
1474 .sendpage = sock_no_sendpage,
1477 static struct notifier_block rose_dev_notifier = {
1478 .notifier_call = rose_device_event,
1481 static struct net_device **dev_rose;
1483 static struct ax25_protocol rose_pid = {
1485 .func = rose_route_frame
1488 static struct ax25_linkfail rose_linkfail_notifier = {
1489 .func = rose_link_failed
1492 static int __init rose_proto_init(void)
1497 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1498 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1503 rc = proto_register(&rose_proto, 0);
1507 rose_callsign = null_ax25_address;
1509 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1511 if (dev_rose == NULL) {
1512 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1514 goto out_proto_unregister;
1517 for (i = 0; i < rose_ndevs; i++) {
1518 struct net_device *dev;
1519 char name[IFNAMSIZ];
1521 sprintf(name, "rose%d", i);
1522 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1524 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1528 rc = register_netdev(dev);
1530 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1534 rose_set_lockdep_key(dev);
1538 sock_register(&rose_family_ops);
1539 register_netdevice_notifier(&rose_dev_notifier);
1541 ax25_register_pid(&rose_pid);
1542 ax25_linkfail_register(&rose_linkfail_notifier);
1544 #ifdef CONFIG_SYSCTL
1545 rose_register_sysctl();
1547 rose_loopback_init();
1549 rose_add_loopback_neigh();
1551 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1552 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1553 &rose_neigh_seqops);
1554 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1556 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1557 &rose_route_seqops);
1562 unregister_netdev(dev_rose[i]);
1563 free_netdev(dev_rose[i]);
1566 out_proto_unregister:
1567 proto_unregister(&rose_proto);
1570 module_init(rose_proto_init);
1572 module_param(rose_ndevs, int, 0);
1573 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1575 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1576 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1577 MODULE_LICENSE("GPL");
1578 MODULE_ALIAS_NETPROTO(PF_ROSE);
1580 static void __exit rose_exit(void)
1584 remove_proc_entry("rose", init_net.proc_net);
1585 remove_proc_entry("rose_neigh", init_net.proc_net);
1586 remove_proc_entry("rose_nodes", init_net.proc_net);
1587 remove_proc_entry("rose_routes", init_net.proc_net);
1588 rose_loopback_clear();
1592 ax25_protocol_release(AX25_P_ROSE);
1593 ax25_linkfail_release(&rose_linkfail_notifier);
1595 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1596 ax25_listen_release(&rose_callsign, NULL);
1598 #ifdef CONFIG_SYSCTL
1599 rose_unregister_sysctl();
1601 unregister_netdevice_notifier(&rose_dev_notifier);
1603 sock_unregister(PF_ROSE);
1605 for (i = 0; i < rose_ndevs; i++) {
1606 struct net_device *dev = dev_rose[i];
1609 unregister_netdev(dev);
1615 proto_unregister(&rose_proto);
1618 module_exit(rose_exit);