2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
21 #include <linux/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/sched/signal.h>
24 #include <linux/spinlock.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/stat.h>
30 #include <net/net_namespace.h>
32 #include <linux/inet.h>
33 #include <linux/netdevice.h>
34 #include <linux/if_arp.h>
35 #include <linux/skbuff.h>
37 #include <linux/uaccess.h>
38 #include <linux/fcntl.h>
39 #include <linux/termios.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/tcp_states.h>
50 static int rose_ndevs = 10;
52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
63 static HLIST_HEAD(rose_list);
64 static DEFINE_SPINLOCK(rose_list_lock);
66 static const struct proto_ops rose_proto_ops;
68 ax25_address rose_callsign;
71 * ROSE network devices are virtual network devices encapsulating ROSE
72 * frames into AX.25 which will be sent through an AX.25 device, so form a
73 * special "super class" of normal net devices; split their locks off into a
74 * separate class since they always nest.
76 static struct lock_class_key rose_netdev_xmit_lock_key;
77 static struct lock_class_key rose_netdev_addr_lock_key;
79 static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
86 static void rose_set_lockdep_key(struct net_device *dev)
88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
93 * Convert a ROSE address into text.
95 char *rose2asc(char *buf, const rose_address *addr)
97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
113 * Compare two ROSE addresses, 0 == equal.
115 int rosecmp(rose_address *addr1, rose_address *addr2)
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
136 for (i = 0; i < mask; i++) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
152 * Socket removal during an interrupt is now safe.
154 static void rose_remove_socket(struct sock *sk)
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
165 void rose_kill_by_neigh(struct rose_neigh *neigh)
169 spin_lock_bh(&rose_list_lock);
170 sk_for_each(s, &rose_list) {
171 struct rose_sock *rose = rose_sk(s);
173 if (rose->neighbour == neigh) {
174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175 rose->neighbour->use--;
176 rose->neighbour = NULL;
179 spin_unlock_bh(&rose_list_lock);
183 * Kill all bound sockets on a dropped device.
185 static void rose_kill_by_device(struct net_device *dev)
189 spin_lock_bh(&rose_list_lock);
190 sk_for_each(s, &rose_list) {
191 struct rose_sock *rose = rose_sk(s);
193 if (rose->device == dev) {
194 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
196 rose->neighbour->use--;
197 dev_put(rose->device);
201 spin_unlock_bh(&rose_list_lock);
205 * Handle device status changes.
207 static int rose_device_event(struct notifier_block *this,
208 unsigned long event, void *ptr)
210 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
212 if (!net_eq(dev_net(dev), &init_net))
215 if (event != NETDEV_DOWN)
220 rose_kill_by_device(dev);
223 rose_link_device_down(dev);
224 rose_rt_device_down(dev);
232 * Add a socket to the bound sockets list.
234 static void rose_insert_socket(struct sock *sk)
237 spin_lock_bh(&rose_list_lock);
238 sk_add_node(sk, &rose_list);
239 spin_unlock_bh(&rose_list_lock);
243 * Find a socket that wants to accept the Call Request we just
246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
250 spin_lock_bh(&rose_list_lock);
251 sk_for_each(s, &rose_list) {
252 struct rose_sock *rose = rose_sk(s);
254 if (!rosecmp(&rose->source_addr, addr) &&
255 !ax25cmp(&rose->source_call, call) &&
256 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
260 sk_for_each(s, &rose_list) {
261 struct rose_sock *rose = rose_sk(s);
263 if (!rosecmp(&rose->source_addr, addr) &&
264 !ax25cmp(&rose->source_call, &null_ax25_address) &&
265 s->sk_state == TCP_LISTEN)
270 spin_unlock_bh(&rose_list_lock);
275 * Find a connected ROSE socket given my LCI and device.
277 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
281 spin_lock_bh(&rose_list_lock);
282 sk_for_each(s, &rose_list) {
283 struct rose_sock *rose = rose_sk(s);
285 if (rose->lci == lci && rose->neighbour == neigh)
290 spin_unlock_bh(&rose_list_lock);
295 * Find a unique LCI for a given device.
297 unsigned int rose_new_lci(struct rose_neigh *neigh)
301 if (neigh->dce_mode) {
302 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
303 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
306 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
307 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
317 void rose_destroy_socket(struct sock *);
320 * Handler for deferred kills.
322 static void rose_destroy_timer(struct timer_list *t)
324 struct sock *sk = from_timer(sk, t, sk_timer);
326 rose_destroy_socket(sk);
330 * This is called from user mode and the timers. Thus it protects itself
331 * against interrupt users but doesn't worry about being called during
332 * work. Once it is removed from the queue no interrupt or bottom half
333 * will touch it and we are (fairly 8-) ) safe.
335 void rose_destroy_socket(struct sock *sk)
339 rose_remove_socket(sk);
340 rose_stop_heartbeat(sk);
341 rose_stop_idletimer(sk);
344 rose_clear_queues(sk); /* Flush the queues */
346 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
347 if (skb->sk != sk) { /* A pending connection */
348 /* Queue the unaccepted socket for death */
349 sock_set_flag(skb->sk, SOCK_DEAD);
350 rose_start_heartbeat(skb->sk);
351 rose_sk(skb->sk)->state = ROSE_STATE_0;
357 if (sk_has_allocations(sk)) {
358 /* Defer: outstanding buffers */
359 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
360 sk->sk_timer.expires = jiffies + 10 * HZ;
361 add_timer(&sk->sk_timer);
367 * Handling for system calls applied via the various interfaces to a
368 * ROSE socket object.
371 static int rose_setsockopt(struct socket *sock, int level, int optname,
372 char __user *optval, unsigned int optlen)
374 struct sock *sk = sock->sk;
375 struct rose_sock *rose = rose_sk(sk);
378 if (level != SOL_ROSE)
381 if (optlen < sizeof(int))
384 if (get_user(opt, (int __user *)optval))
389 rose->defer = opt ? 1 : 0;
419 rose->idle = opt * 60 * HZ;
423 rose->qbitincl = opt ? 1 : 0;
431 static int rose_getsockopt(struct socket *sock, int level, int optname,
432 char __user *optval, int __user *optlen)
434 struct sock *sk = sock->sk;
435 struct rose_sock *rose = rose_sk(sk);
439 if (level != SOL_ROSE)
442 if (get_user(len, optlen))
470 val = rose->idle / (60 * HZ);
474 val = rose->qbitincl;
481 len = min_t(unsigned int, len, sizeof(int));
483 if (put_user(len, optlen))
486 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
489 static int rose_listen(struct socket *sock, int backlog)
491 struct sock *sk = sock->sk;
494 if (sock->state != SS_UNCONNECTED) {
499 if (sk->sk_state != TCP_LISTEN) {
500 struct rose_sock *rose = rose_sk(sk);
502 rose->dest_ndigis = 0;
503 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
504 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
505 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
506 sk->sk_max_ack_backlog = backlog;
507 sk->sk_state = TCP_LISTEN;
516 static struct proto rose_proto = {
518 .owner = THIS_MODULE,
519 .obj_size = sizeof(struct rose_sock),
522 static int rose_create(struct net *net, struct socket *sock, int protocol,
526 struct rose_sock *rose;
528 if (!net_eq(net, &init_net))
529 return -EAFNOSUPPORT;
531 if (sock->type != SOCK_SEQPACKET || protocol != 0)
532 return -ESOCKTNOSUPPORT;
534 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
540 sock_init_data(sock, sk);
542 skb_queue_head_init(&rose->ack_queue);
544 skb_queue_head_init(&rose->frag_queue);
548 sock->ops = &rose_proto_ops;
549 sk->sk_protocol = protocol;
551 timer_setup(&rose->timer, NULL, 0);
552 timer_setup(&rose->idletimer, NULL, 0);
554 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
555 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
556 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
557 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
558 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
560 rose->state = ROSE_STATE_0;
565 static struct sock *rose_make_new(struct sock *osk)
568 struct rose_sock *rose, *orose;
570 if (osk->sk_type != SOCK_SEQPACKET)
573 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
579 sock_init_data(NULL, sk);
581 skb_queue_head_init(&rose->ack_queue);
583 skb_queue_head_init(&rose->frag_queue);
587 sk->sk_type = osk->sk_type;
588 sk->sk_priority = osk->sk_priority;
589 sk->sk_protocol = osk->sk_protocol;
590 sk->sk_rcvbuf = osk->sk_rcvbuf;
591 sk->sk_sndbuf = osk->sk_sndbuf;
592 sk->sk_state = TCP_ESTABLISHED;
593 sock_copy_flags(sk, osk);
595 timer_setup(&rose->timer, NULL, 0);
596 timer_setup(&rose->idletimer, NULL, 0);
598 orose = rose_sk(osk);
599 rose->t1 = orose->t1;
600 rose->t2 = orose->t2;
601 rose->t3 = orose->t3;
602 rose->hb = orose->hb;
603 rose->idle = orose->idle;
604 rose->defer = orose->defer;
605 rose->device = orose->device;
607 dev_hold(rose->device);
608 rose->qbitincl = orose->qbitincl;
613 static int rose_release(struct socket *sock)
615 struct sock *sk = sock->sk;
616 struct rose_sock *rose;
618 if (sk == NULL) return 0;
625 switch (rose->state) {
628 rose_disconnect(sk, 0, -1, -1);
630 rose_destroy_socket(sk);
634 rose->neighbour->use--;
636 rose_disconnect(sk, 0, -1, -1);
638 rose_destroy_socket(sk);
645 rose_clear_queues(sk);
646 rose_stop_idletimer(sk);
647 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
648 rose_start_t3timer(sk);
649 rose->state = ROSE_STATE_2;
650 sk->sk_state = TCP_CLOSE;
651 sk->sk_shutdown |= SEND_SHUTDOWN;
652 sk->sk_state_change(sk);
653 sock_set_flag(sk, SOCK_DEAD);
654 sock_set_flag(sk, SOCK_DESTROY);
661 dev_put(rose->device);
669 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
671 struct sock *sk = sock->sk;
672 struct rose_sock *rose = rose_sk(sk);
673 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
674 struct net_device *dev;
675 ax25_address *source;
676 ax25_uid_assoc *user;
679 if (!sock_flag(sk, SOCK_ZAPPED))
682 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
685 if (addr->srose_family != AF_ROSE)
688 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
691 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
694 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
695 return -EADDRNOTAVAIL;
697 source = &addr->srose_call;
699 user = ax25_findbyuid(current_euid());
701 rose->source_call = user->call;
704 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
706 rose->source_call = *source;
709 rose->source_addr = addr->srose_addr;
711 rose->source_ndigis = addr->srose_ndigis;
713 if (addr_len == sizeof(struct full_sockaddr_rose)) {
714 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
715 for (n = 0 ; n < addr->srose_ndigis ; n++)
716 rose->source_digis[n] = full_addr->srose_digis[n];
718 if (rose->source_ndigis == 1) {
719 rose->source_digis[0] = addr->srose_digi;
723 rose_insert_socket(sk);
725 sock_reset_flag(sk, SOCK_ZAPPED);
730 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
732 struct sock *sk = sock->sk;
733 struct rose_sock *rose = rose_sk(sk);
734 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
735 unsigned char cause, diagnostic;
736 ax25_uid_assoc *user;
739 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
742 if (addr->srose_family != AF_ROSE)
745 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
748 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
751 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
752 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
757 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
758 /* Connect completed during a ERESTARTSYS event */
759 sock->state = SS_CONNECTED;
763 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
764 sock->state = SS_UNCONNECTED;
769 if (sk->sk_state == TCP_ESTABLISHED) {
770 /* No reconnect on a seqpacket socket */
775 sk->sk_state = TCP_CLOSE;
776 sock->state = SS_UNCONNECTED;
778 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
780 if (!rose->neighbour) {
785 rose->lci = rose_new_lci(rose->neighbour);
791 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
792 struct net_device *dev;
794 sock_reset_flag(sk, SOCK_ZAPPED);
796 dev = rose_dev_first();
802 user = ax25_findbyuid(current_euid());
809 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
810 rose->source_call = user->call;
814 rose_insert_socket(sk); /* Finish the bind */
816 rose->dest_addr = addr->srose_addr;
817 rose->dest_call = addr->srose_call;
818 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
819 rose->dest_ndigis = addr->srose_ndigis;
821 if (addr_len == sizeof(struct full_sockaddr_rose)) {
822 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
823 for (n = 0 ; n < addr->srose_ndigis ; n++)
824 rose->dest_digis[n] = full_addr->srose_digis[n];
826 if (rose->dest_ndigis == 1) {
827 rose->dest_digis[0] = addr->srose_digi;
831 /* Move to connecting socket, start sending Connect Requests */
832 sock->state = SS_CONNECTING;
833 sk->sk_state = TCP_SYN_SENT;
835 rose->state = ROSE_STATE_1;
837 rose->neighbour->use++;
839 rose_write_internal(sk, ROSE_CALL_REQUEST);
840 rose_start_heartbeat(sk);
841 rose_start_t1timer(sk);
844 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
850 * A Connect Ack with Choke or timeout or failed routing will go to
853 if (sk->sk_state == TCP_SYN_SENT) {
857 prepare_to_wait(sk_sleep(sk), &wait,
859 if (sk->sk_state != TCP_SYN_SENT)
861 if (!signal_pending(current)) {
870 finish_wait(sk_sleep(sk), &wait);
876 if (sk->sk_state != TCP_ESTABLISHED) {
877 sock->state = SS_UNCONNECTED;
878 err = sock_error(sk); /* Always set at this point */
882 sock->state = SS_CONNECTED;
890 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
899 if ((sk = sock->sk) == NULL)
903 if (sk->sk_type != SOCK_SEQPACKET) {
908 if (sk->sk_state != TCP_LISTEN) {
914 * The write queue this time is holding sockets ready to use
915 * hooked into the SABM we saved
918 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
920 skb = skb_dequeue(&sk->sk_receive_queue);
924 if (flags & O_NONBLOCK) {
928 if (!signal_pending(current)) {
937 finish_wait(sk_sleep(sk), &wait);
942 sock_graft(newsk, newsock);
944 /* Now attach up the new socket */
947 sk->sk_ack_backlog--;
955 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
956 int *uaddr_len, int peer)
958 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
959 struct sock *sk = sock->sk;
960 struct rose_sock *rose = rose_sk(sk);
963 memset(srose, 0, sizeof(*srose));
965 if (sk->sk_state != TCP_ESTABLISHED)
967 srose->srose_family = AF_ROSE;
968 srose->srose_addr = rose->dest_addr;
969 srose->srose_call = rose->dest_call;
970 srose->srose_ndigis = rose->dest_ndigis;
971 for (n = 0; n < rose->dest_ndigis; n++)
972 srose->srose_digis[n] = rose->dest_digis[n];
974 srose->srose_family = AF_ROSE;
975 srose->srose_addr = rose->source_addr;
976 srose->srose_call = rose->source_call;
977 srose->srose_ndigis = rose->source_ndigis;
978 for (n = 0; n < rose->source_ndigis; n++)
979 srose->srose_digis[n] = rose->source_digis[n];
982 *uaddr_len = sizeof(struct full_sockaddr_rose);
986 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
990 struct rose_sock *make_rose;
991 struct rose_facilities_struct facilities;
994 skb->sk = NULL; /* Initially we don't know who it's for */
997 * skb->data points to the rose frame start
999 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
1001 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1002 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1004 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1008 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1011 * We can't accept the Call Request.
1013 if (sk == NULL || sk_acceptq_is_full(sk) ||
1014 (make = rose_make_new(sk)) == NULL) {
1015 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1020 make->sk_state = TCP_ESTABLISHED;
1021 make_rose = rose_sk(make);
1023 make_rose->lci = lci;
1024 make_rose->dest_addr = facilities.dest_addr;
1025 make_rose->dest_call = facilities.dest_call;
1026 make_rose->dest_ndigis = facilities.dest_ndigis;
1027 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1028 make_rose->dest_digis[n] = facilities.dest_digis[n];
1029 make_rose->source_addr = facilities.source_addr;
1030 make_rose->source_call = facilities.source_call;
1031 make_rose->source_ndigis = facilities.source_ndigis;
1032 for (n = 0 ; n < facilities.source_ndigis ; n++)
1033 make_rose->source_digis[n] = facilities.source_digis[n];
1034 make_rose->neighbour = neigh;
1035 make_rose->device = dev;
1036 make_rose->facilities = facilities;
1038 make_rose->neighbour->use++;
1040 if (rose_sk(sk)->defer) {
1041 make_rose->state = ROSE_STATE_5;
1043 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1044 make_rose->state = ROSE_STATE_3;
1045 rose_start_idletimer(make);
1048 make_rose->condition = 0x00;
1053 sk->sk_ack_backlog++;
1055 rose_insert_socket(make);
1057 skb_queue_head(&sk->sk_receive_queue, skb);
1059 rose_start_heartbeat(make);
1061 if (!sock_flag(sk, SOCK_DEAD))
1062 sk->sk_data_ready(sk);
1067 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1069 struct sock *sk = sock->sk;
1070 struct rose_sock *rose = rose_sk(sk);
1071 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1073 struct full_sockaddr_rose srose;
1074 struct sk_buff *skb;
1075 unsigned char *asmptr;
1076 int n, size, qbit = 0;
1078 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1081 if (sock_flag(sk, SOCK_ZAPPED))
1082 return -EADDRNOTAVAIL;
1084 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1085 send_sig(SIGPIPE, current, 0);
1089 if (rose->neighbour == NULL || rose->device == NULL)
1090 return -ENETUNREACH;
1092 if (usrose != NULL) {
1093 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1095 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1096 memcpy(&srose, usrose, msg->msg_namelen);
1097 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1098 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1100 if (srose.srose_ndigis != rose->dest_ndigis)
1102 if (srose.srose_ndigis == rose->dest_ndigis) {
1103 for (n = 0 ; n < srose.srose_ndigis ; n++)
1104 if (ax25cmp(&rose->dest_digis[n],
1105 &srose.srose_digis[n]))
1108 if (srose.srose_family != AF_ROSE)
1111 if (sk->sk_state != TCP_ESTABLISHED)
1114 srose.srose_family = AF_ROSE;
1115 srose.srose_addr = rose->dest_addr;
1116 srose.srose_call = rose->dest_call;
1117 srose.srose_ndigis = rose->dest_ndigis;
1118 for (n = 0 ; n < rose->dest_ndigis ; n++)
1119 srose.srose_digis[n] = rose->dest_digis[n];
1122 /* Build a packet */
1123 /* Sanity check the packet size */
1127 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1129 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1132 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1135 * Put the data on the end
1138 skb_reset_transport_header(skb);
1141 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1148 * If the Q BIT Include socket option is in force, the first
1149 * byte of the user data is the logical value of the Q Bit.
1151 if (rose->qbitincl) {
1152 qbit = skb->data[0];
1157 * Push down the ROSE header
1159 asmptr = skb_push(skb, ROSE_MIN_LEN);
1161 /* Build a ROSE Network header */
1162 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1163 asmptr[1] = (rose->lci >> 0) & 0xFF;
1164 asmptr[2] = ROSE_DATA;
1167 asmptr[0] |= ROSE_Q_BIT;
1169 if (sk->sk_state != TCP_ESTABLISHED) {
1175 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1176 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1177 unsigned char header[ROSE_MIN_LEN];
1178 struct sk_buff *skbn;
1182 /* Save a copy of the Header */
1183 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1184 skb_pull(skb, ROSE_MIN_LEN);
1186 frontlen = skb_headroom(skb);
1188 while (skb->len > 0) {
1189 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1198 skb_reserve(skbn, frontlen);
1200 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1202 /* Copy the user data */
1203 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1206 /* Duplicate the Header */
1207 skb_push(skbn, ROSE_MIN_LEN);
1208 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1211 skbn->data[2] |= M_BIT;
1213 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1219 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1222 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1231 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1234 struct sock *sk = sock->sk;
1235 struct rose_sock *rose = rose_sk(sk);
1237 unsigned char *asmptr;
1238 struct sk_buff *skb;
1242 * This works for seqpacket too. The receiver has ordered the queue for
1243 * us! We do one quick check first though
1245 if (sk->sk_state != TCP_ESTABLISHED)
1248 /* Now we can treat all alike */
1249 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1252 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1254 skb_pull(skb, ROSE_MIN_LEN);
1256 if (rose->qbitincl) {
1257 asmptr = skb_push(skb, 1);
1261 skb_reset_transport_header(skb);
1264 if (copied > size) {
1266 msg->msg_flags |= MSG_TRUNC;
1269 skb_copy_datagram_msg(skb, 0, msg, copied);
1271 if (msg->msg_name) {
1272 struct sockaddr_rose *srose;
1273 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1276 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1277 srose = msg->msg_name;
1278 srose->srose_family = AF_ROSE;
1279 srose->srose_addr = rose->dest_addr;
1280 srose->srose_call = rose->dest_call;
1281 srose->srose_ndigis = rose->dest_ndigis;
1282 for (n = 0 ; n < rose->dest_ndigis ; n++)
1283 full_srose->srose_digis[n] = rose->dest_digis[n];
1284 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1287 skb_free_datagram(sk, skb);
1293 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1295 struct sock *sk = sock->sk;
1296 struct rose_sock *rose = rose_sk(sk);
1297 void __user *argp = (void __user *)arg;
1303 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1306 return put_user(amount, (unsigned int __user *) argp);
1310 struct sk_buff *skb;
1312 /* These two are safe on a single CPU system as only user tasks fiddle here */
1313 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1315 return put_user(amount, (unsigned int __user *) argp);
1319 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1322 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1326 case SIOCGIFDSTADDR:
1327 case SIOCSIFDSTADDR:
1328 case SIOCGIFBRDADDR:
1329 case SIOCSIFBRDADDR:
1330 case SIOCGIFNETMASK:
1331 case SIOCSIFNETMASK:
1339 if (!capable(CAP_NET_ADMIN))
1341 return rose_rt_ioctl(cmd, argp);
1343 case SIOCRSGCAUSE: {
1344 struct rose_cause_struct rose_cause;
1345 rose_cause.cause = rose->cause;
1346 rose_cause.diagnostic = rose->diagnostic;
1347 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1350 case SIOCRSSCAUSE: {
1351 struct rose_cause_struct rose_cause;
1352 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1354 rose->cause = rose_cause.cause;
1355 rose->diagnostic = rose_cause.diagnostic;
1360 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1361 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1362 ax25_listen_release(&rose_callsign, NULL);
1363 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1365 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1366 return ax25_listen_register(&rose_callsign, NULL);
1371 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1374 if (rose->state == ROSE_STATE_5) {
1375 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1376 rose_start_idletimer(sk);
1377 rose->condition = 0x00;
1382 rose->state = ROSE_STATE_3;
1387 return -ENOIOCTLCMD;
1393 #ifdef CONFIG_PROC_FS
1394 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1395 __acquires(rose_list_lock)
1397 spin_lock_bh(&rose_list_lock);
1398 return seq_hlist_start_head(&rose_list, *pos);
1401 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1403 return seq_hlist_next(v, &rose_list, pos);
1406 static void rose_info_stop(struct seq_file *seq, void *v)
1407 __releases(rose_list_lock)
1409 spin_unlock_bh(&rose_list_lock);
1412 static int rose_info_show(struct seq_file *seq, void *v)
1414 char buf[11], rsbuf[11];
1416 if (v == SEQ_START_TOKEN)
1418 "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");
1421 struct sock *s = sk_entry(v);
1422 struct rose_sock *rose = rose_sk(s);
1423 const char *devname, *callsign;
1424 const struct net_device *dev = rose->device;
1429 devname = dev->name;
1431 seq_printf(seq, "%-10s %-9s ",
1432 rose2asc(rsbuf, &rose->dest_addr),
1433 ax2asc(buf, &rose->dest_call));
1435 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1436 callsign = "??????-?";
1438 callsign = ax2asc(buf, &rose->source_call);
1441 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1442 rose2asc(rsbuf, &rose->source_addr),
1446 (rose->neighbour) ? rose->neighbour->number : 0,
1451 ax25_display_timer(&rose->timer) / HZ,
1456 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1457 rose->idle / (60 * HZ),
1458 sk_wmem_alloc_get(s),
1459 sk_rmem_alloc_get(s),
1460 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1466 static const struct seq_operations rose_info_seqops = {
1467 .start = rose_info_start,
1468 .next = rose_info_next,
1469 .stop = rose_info_stop,
1470 .show = rose_info_show,
1473 static int rose_info_open(struct inode *inode, struct file *file)
1475 return seq_open(file, &rose_info_seqops);
1478 static const struct file_operations rose_info_fops = {
1479 .owner = THIS_MODULE,
1480 .open = rose_info_open,
1482 .llseek = seq_lseek,
1483 .release = seq_release,
1485 #endif /* CONFIG_PROC_FS */
1487 static const struct net_proto_family rose_family_ops = {
1489 .create = rose_create,
1490 .owner = THIS_MODULE,
1493 static const struct proto_ops rose_proto_ops = {
1495 .owner = THIS_MODULE,
1496 .release = rose_release,
1498 .connect = rose_connect,
1499 .socketpair = sock_no_socketpair,
1500 .accept = rose_accept,
1501 .getname = rose_getname,
1502 .poll = datagram_poll,
1503 .ioctl = rose_ioctl,
1504 .listen = rose_listen,
1505 .shutdown = sock_no_shutdown,
1506 .setsockopt = rose_setsockopt,
1507 .getsockopt = rose_getsockopt,
1508 .sendmsg = rose_sendmsg,
1509 .recvmsg = rose_recvmsg,
1510 .mmap = sock_no_mmap,
1511 .sendpage = sock_no_sendpage,
1514 static struct notifier_block rose_dev_notifier = {
1515 .notifier_call = rose_device_event,
1518 static struct net_device **dev_rose;
1520 static struct ax25_protocol rose_pid = {
1522 .func = rose_route_frame
1525 static struct ax25_linkfail rose_linkfail_notifier = {
1526 .func = rose_link_failed
1529 static int __init rose_proto_init(void)
1534 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1535 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1540 rc = proto_register(&rose_proto, 0);
1544 rose_callsign = null_ax25_address;
1546 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1547 if (dev_rose == NULL) {
1548 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1550 goto out_proto_unregister;
1553 for (i = 0; i < rose_ndevs; i++) {
1554 struct net_device *dev;
1555 char name[IFNAMSIZ];
1557 sprintf(name, "rose%d", i);
1558 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1560 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1564 rc = register_netdev(dev);
1566 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1570 rose_set_lockdep_key(dev);
1574 sock_register(&rose_family_ops);
1575 register_netdevice_notifier(&rose_dev_notifier);
1577 ax25_register_pid(&rose_pid);
1578 ax25_linkfail_register(&rose_linkfail_notifier);
1580 #ifdef CONFIG_SYSCTL
1581 rose_register_sysctl();
1583 rose_loopback_init();
1585 rose_add_loopback_neigh();
1587 proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1588 proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1590 proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1592 proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1598 unregister_netdev(dev_rose[i]);
1599 free_netdev(dev_rose[i]);
1602 out_proto_unregister:
1603 proto_unregister(&rose_proto);
1606 module_init(rose_proto_init);
1608 module_param(rose_ndevs, int, 0);
1609 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1611 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1612 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1613 MODULE_LICENSE("GPL");
1614 MODULE_ALIAS_NETPROTO(PF_ROSE);
1616 static void __exit rose_exit(void)
1620 remove_proc_entry("rose", init_net.proc_net);
1621 remove_proc_entry("rose_neigh", init_net.proc_net);
1622 remove_proc_entry("rose_nodes", init_net.proc_net);
1623 remove_proc_entry("rose_routes", init_net.proc_net);
1624 rose_loopback_clear();
1628 ax25_protocol_release(AX25_P_ROSE);
1629 ax25_linkfail_release(&rose_linkfail_notifier);
1631 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1632 ax25_listen_release(&rose_callsign, NULL);
1634 #ifdef CONFIG_SYSCTL
1635 rose_unregister_sysctl();
1637 unregister_netdevice_notifier(&rose_dev_notifier);
1639 sock_unregister(PF_ROSE);
1641 for (i = 0; i < rose_ndevs; i++) {
1642 struct net_device *dev = dev_rose[i];
1645 unregister_netdev(dev);
1651 proto_unregister(&rose_proto);
1654 module_exit(rose_exit);