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/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/spinlock.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/stat.h>
29 #include <net/net_namespace.h>
31 #include <linux/inet.h>
32 #include <linux/netdevice.h>
33 #include <linux/if_arp.h>
34 #include <linux/skbuff.h>
36 #include <asm/system.h>
37 #include <asm/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 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;
78 static void rose_set_lockdep_one(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 rose_set_lockdep_one(&dev->tx_queue);
89 * Convert a ROSE address into text.
91 const char *rose2asc(const rose_address *addr)
93 static char buffer[11];
95 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
96 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
97 addr->rose_addr[4] == 0x00) {
100 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
101 addr->rose_addr[1] & 0xFF,
102 addr->rose_addr[2] & 0xFF,
103 addr->rose_addr[3] & 0xFF,
104 addr->rose_addr[4] & 0xFF);
111 * Compare two ROSE addresses, 0 == equal.
113 int rosecmp(rose_address *addr1, rose_address *addr2)
117 for (i = 0; i < 5; i++)
118 if (addr1->rose_addr[i] != addr2->rose_addr[i])
125 * Compare two ROSE addresses for only mask digits, 0 == equal.
127 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
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)
166 struct hlist_node *node;
168 spin_lock_bh(&rose_list_lock);
169 sk_for_each(s, node, &rose_list) {
170 struct rose_sock *rose = rose_sk(s);
172 if (rose->neighbour == neigh) {
173 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
174 rose->neighbour->use--;
175 rose->neighbour = NULL;
178 spin_unlock_bh(&rose_list_lock);
182 * Kill all bound sockets on a dropped device.
184 static void rose_kill_by_device(struct net_device *dev)
187 struct hlist_node *node;
189 spin_lock_bh(&rose_list_lock);
190 sk_for_each(s, node, &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);
195 rose->neighbour->use--;
199 spin_unlock_bh(&rose_list_lock);
203 * Handle device status changes.
205 static int rose_device_event(struct notifier_block *this, unsigned long event,
208 struct net_device *dev = (struct net_device *)ptr;
210 if (dev_net(dev) != &init_net)
213 if (event != NETDEV_DOWN)
218 rose_kill_by_device(dev);
221 rose_link_device_down(dev);
222 rose_rt_device_down(dev);
230 * Add a socket to the bound sockets list.
232 static void rose_insert_socket(struct sock *sk)
235 spin_lock_bh(&rose_list_lock);
236 sk_add_node(sk, &rose_list);
237 spin_unlock_bh(&rose_list_lock);
241 * Find a socket that wants to accept the Call Request we just
244 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
247 struct hlist_node *node;
249 spin_lock_bh(&rose_list_lock);
250 sk_for_each(s, node, &rose_list) {
251 struct rose_sock *rose = rose_sk(s);
253 if (!rosecmp(&rose->source_addr, addr) &&
254 !ax25cmp(&rose->source_call, call) &&
255 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
259 sk_for_each(s, node, &rose_list) {
260 struct rose_sock *rose = rose_sk(s);
262 if (!rosecmp(&rose->source_addr, addr) &&
263 !ax25cmp(&rose->source_call, &null_ax25_address) &&
264 s->sk_state == TCP_LISTEN)
269 spin_unlock_bh(&rose_list_lock);
274 * Find a connected ROSE socket given my LCI and device.
276 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
279 struct hlist_node *node;
281 spin_lock_bh(&rose_list_lock);
282 sk_for_each(s, node, &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(unsigned long data)
324 rose_destroy_socket((struct sock *)data);
328 * This is called from user mode and the timers. Thus it protects itself
329 * against interrupt users but doesn't worry about being called during
330 * work. Once it is removed from the queue no interrupt or bottom half
331 * will touch it and we are (fairly 8-) ) safe.
333 void rose_destroy_socket(struct sock *sk)
337 rose_remove_socket(sk);
338 rose_stop_heartbeat(sk);
339 rose_stop_idletimer(sk);
342 rose_clear_queues(sk); /* Flush the queues */
344 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
345 if (skb->sk != sk) { /* A pending connection */
346 /* Queue the unaccepted socket for death */
347 sock_set_flag(skb->sk, SOCK_DEAD);
348 rose_start_heartbeat(skb->sk);
349 rose_sk(skb->sk)->state = ROSE_STATE_0;
355 if (atomic_read(&sk->sk_wmem_alloc) ||
356 atomic_read(&sk->sk_rmem_alloc)) {
357 /* Defer: outstanding buffers */
358 setup_timer(&sk->sk_timer, rose_destroy_timer,
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, 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;
493 if (sk->sk_state != TCP_LISTEN) {
494 struct rose_sock *rose = rose_sk(sk);
496 rose->dest_ndigis = 0;
497 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
498 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
499 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
500 sk->sk_max_ack_backlog = backlog;
501 sk->sk_state = TCP_LISTEN;
508 static struct proto rose_proto = {
510 .owner = THIS_MODULE,
511 .obj_size = sizeof(struct rose_sock),
514 static int rose_create(struct net *net, struct socket *sock, int protocol)
517 struct rose_sock *rose;
519 if (net != &init_net)
520 return -EAFNOSUPPORT;
522 if (sock->type != SOCK_SEQPACKET || protocol != 0)
523 return -ESOCKTNOSUPPORT;
525 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
531 sock_init_data(sock, sk);
533 skb_queue_head_init(&rose->ack_queue);
535 skb_queue_head_init(&rose->frag_queue);
539 sock->ops = &rose_proto_ops;
540 sk->sk_protocol = protocol;
542 init_timer(&rose->timer);
543 init_timer(&rose->idletimer);
545 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
546 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
547 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
548 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
549 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
551 rose->state = ROSE_STATE_0;
556 static struct sock *rose_make_new(struct sock *osk)
559 struct rose_sock *rose, *orose;
561 if (osk->sk_type != SOCK_SEQPACKET)
564 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
570 sock_init_data(NULL, sk);
572 skb_queue_head_init(&rose->ack_queue);
574 skb_queue_head_init(&rose->frag_queue);
578 sk->sk_type = osk->sk_type;
579 sk->sk_priority = osk->sk_priority;
580 sk->sk_protocol = osk->sk_protocol;
581 sk->sk_rcvbuf = osk->sk_rcvbuf;
582 sk->sk_sndbuf = osk->sk_sndbuf;
583 sk->sk_state = TCP_ESTABLISHED;
584 sock_copy_flags(sk, osk);
586 init_timer(&rose->timer);
587 init_timer(&rose->idletimer);
589 orose = rose_sk(osk);
590 rose->t1 = orose->t1;
591 rose->t2 = orose->t2;
592 rose->t3 = orose->t3;
593 rose->hb = orose->hb;
594 rose->idle = orose->idle;
595 rose->defer = orose->defer;
596 rose->device = orose->device;
597 rose->qbitincl = orose->qbitincl;
602 static int rose_release(struct socket *sock)
604 struct sock *sk = sock->sk;
605 struct rose_sock *rose;
607 if (sk == NULL) return 0;
614 switch (rose->state) {
617 rose_disconnect(sk, 0, -1, -1);
619 rose_destroy_socket(sk);
623 rose->neighbour->use--;
625 rose_disconnect(sk, 0, -1, -1);
627 rose_destroy_socket(sk);
634 rose_clear_queues(sk);
635 rose_stop_idletimer(sk);
636 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
637 rose_start_t3timer(sk);
638 rose->state = ROSE_STATE_2;
639 sk->sk_state = TCP_CLOSE;
640 sk->sk_shutdown |= SEND_SHUTDOWN;
641 sk->sk_state_change(sk);
642 sock_set_flag(sk, SOCK_DEAD);
643 sock_set_flag(sk, SOCK_DESTROY);
657 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
659 struct sock *sk = sock->sk;
660 struct rose_sock *rose = rose_sk(sk);
661 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
662 struct net_device *dev;
663 ax25_address *source;
664 ax25_uid_assoc *user;
667 if (!sock_flag(sk, SOCK_ZAPPED))
670 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
673 if (addr->srose_family != AF_ROSE)
676 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
679 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
682 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
683 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
684 return -EADDRNOTAVAIL;
687 source = &addr->srose_call;
689 user = ax25_findbyuid(current->euid);
691 rose->source_call = user->call;
694 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
696 rose->source_call = *source;
699 rose->source_addr = addr->srose_addr;
701 rose->source_ndigis = addr->srose_ndigis;
703 if (addr_len == sizeof(struct full_sockaddr_rose)) {
704 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
705 for (n = 0 ; n < addr->srose_ndigis ; n++)
706 rose->source_digis[n] = full_addr->srose_digis[n];
708 if (rose->source_ndigis == 1) {
709 rose->source_digis[0] = addr->srose_digi;
713 rose_insert_socket(sk);
715 sock_reset_flag(sk, SOCK_ZAPPED);
716 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
720 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
722 struct sock *sk = sock->sk;
723 struct rose_sock *rose = rose_sk(sk);
724 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
725 unsigned char cause, diagnostic;
726 struct net_device *dev;
727 ax25_uid_assoc *user;
730 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
733 if (addr->srose_family != AF_ROSE)
736 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
739 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
742 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
743 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
748 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
749 /* Connect completed during a ERESTARTSYS event */
750 sock->state = SS_CONNECTED;
754 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
755 sock->state = SS_UNCONNECTED;
760 if (sk->sk_state == TCP_ESTABLISHED) {
761 /* No reconnect on a seqpacket socket */
766 sk->sk_state = TCP_CLOSE;
767 sock->state = SS_UNCONNECTED;
769 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
771 if (!rose->neighbour) {
776 rose->lci = rose_new_lci(rose->neighbour);
782 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
783 sock_reset_flag(sk, SOCK_ZAPPED);
785 if ((dev = rose_dev_first()) == NULL) {
790 user = ax25_findbyuid(current->euid);
796 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
797 rose->source_call = user->call;
801 rose_insert_socket(sk); /* Finish the bind */
804 rose->dest_addr = addr->srose_addr;
805 rose->dest_call = addr->srose_call;
806 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
807 rose->dest_ndigis = addr->srose_ndigis;
809 if (addr_len == sizeof(struct full_sockaddr_rose)) {
810 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
811 for (n = 0 ; n < addr->srose_ndigis ; n++)
812 rose->dest_digis[n] = full_addr->srose_digis[n];
814 if (rose->dest_ndigis == 1) {
815 rose->dest_digis[0] = addr->srose_digi;
819 /* Move to connecting socket, start sending Connect Requests */
820 sock->state = SS_CONNECTING;
821 sk->sk_state = TCP_SYN_SENT;
823 rose->state = ROSE_STATE_1;
825 rose->neighbour->use++;
827 rose_write_internal(sk, ROSE_CALL_REQUEST);
828 rose_start_heartbeat(sk);
829 rose_start_t1timer(sk);
832 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
838 * A Connect Ack with Choke or timeout or failed routing will go to
841 if (sk->sk_state == TCP_SYN_SENT) {
845 prepare_to_wait(sk->sk_sleep, &wait,
847 if (sk->sk_state != TCP_SYN_SENT)
849 if (!signal_pending(current)) {
858 finish_wait(sk->sk_sleep, &wait);
864 if (sk->sk_state != TCP_ESTABLISHED) {
865 /* Try next neighbour */
866 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
868 goto rose_try_next_neigh;
870 /* No more neighbours */
871 sock->state = SS_UNCONNECTED;
872 err = sock_error(sk); /* Always set at this point */
876 sock->state = SS_CONNECTED;
884 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
892 if ((sk = sock->sk) == NULL)
896 if (sk->sk_type != SOCK_SEQPACKET) {
901 if (sk->sk_state != TCP_LISTEN) {
907 * The write queue this time is holding sockets ready to use
908 * hooked into the SABM we saved
911 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
913 skb = skb_dequeue(&sk->sk_receive_queue);
917 if (flags & O_NONBLOCK) {
921 if (!signal_pending(current)) {
930 finish_wait(sk->sk_sleep, &wait);
935 sock_graft(newsk, newsock);
937 /* Now attach up the new socket */
940 sk->sk_ack_backlog--;
948 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
949 int *uaddr_len, int peer)
951 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
952 struct sock *sk = sock->sk;
953 struct rose_sock *rose = rose_sk(sk);
957 if (sk->sk_state != TCP_ESTABLISHED)
959 srose->srose_family = AF_ROSE;
960 srose->srose_addr = rose->dest_addr;
961 srose->srose_call = rose->dest_call;
962 srose->srose_ndigis = rose->dest_ndigis;
963 for (n = 0; n < rose->dest_ndigis; n++)
964 srose->srose_digis[n] = rose->dest_digis[n];
966 srose->srose_family = AF_ROSE;
967 srose->srose_addr = rose->source_addr;
968 srose->srose_call = rose->source_call;
969 srose->srose_ndigis = rose->source_ndigis;
970 for (n = 0; n < rose->source_ndigis; n++)
971 srose->srose_digis[n] = rose->source_digis[n];
974 *uaddr_len = sizeof(struct full_sockaddr_rose);
978 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
982 struct rose_sock *make_rose;
983 struct rose_facilities_struct facilities;
986 skb->sk = NULL; /* Initially we don't know who it's for */
989 * skb->data points to the rose frame start
991 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
993 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
994 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
995 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
996 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1000 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1003 * We can't accept the Call Request.
1005 if (sk == NULL || sk_acceptq_is_full(sk) ||
1006 (make = rose_make_new(sk)) == NULL) {
1007 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1012 make->sk_state = TCP_ESTABLISHED;
1013 make_rose = rose_sk(make);
1015 make_rose->lci = lci;
1016 make_rose->dest_addr = facilities.dest_addr;
1017 make_rose->dest_call = facilities.dest_call;
1018 make_rose->dest_ndigis = facilities.dest_ndigis;
1019 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1020 make_rose->dest_digis[n] = facilities.dest_digis[n];
1021 make_rose->source_addr = facilities.source_addr;
1022 make_rose->source_call = facilities.source_call;
1023 make_rose->source_ndigis = facilities.source_ndigis;
1024 for (n = 0 ; n < facilities.source_ndigis ; n++)
1025 make_rose->source_digis[n]= facilities.source_digis[n];
1026 make_rose->neighbour = neigh;
1027 make_rose->device = dev;
1028 make_rose->facilities = facilities;
1030 make_rose->neighbour->use++;
1032 if (rose_sk(sk)->defer) {
1033 make_rose->state = ROSE_STATE_5;
1035 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1036 make_rose->state = ROSE_STATE_3;
1037 rose_start_idletimer(make);
1040 make_rose->condition = 0x00;
1045 sk->sk_ack_backlog++;
1047 rose_insert_socket(make);
1049 skb_queue_head(&sk->sk_receive_queue, skb);
1051 rose_start_heartbeat(make);
1053 if (!sock_flag(sk, SOCK_DEAD))
1054 sk->sk_data_ready(sk, skb->len);
1059 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1060 struct msghdr *msg, size_t len)
1062 struct sock *sk = sock->sk;
1063 struct rose_sock *rose = rose_sk(sk);
1064 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1066 struct full_sockaddr_rose srose;
1067 struct sk_buff *skb;
1068 unsigned char *asmptr;
1069 int n, size, qbit = 0;
1071 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1074 if (sock_flag(sk, SOCK_ZAPPED))
1075 return -EADDRNOTAVAIL;
1077 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1078 send_sig(SIGPIPE, current, 0);
1082 if (rose->neighbour == NULL || rose->device == NULL)
1083 return -ENETUNREACH;
1085 if (usrose != NULL) {
1086 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1088 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1089 memcpy(&srose, usrose, msg->msg_namelen);
1090 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1091 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1093 if (srose.srose_ndigis != rose->dest_ndigis)
1095 if (srose.srose_ndigis == rose->dest_ndigis) {
1096 for (n = 0 ; n < srose.srose_ndigis ; n++)
1097 if (ax25cmp(&rose->dest_digis[n],
1098 &srose.srose_digis[n]))
1101 if (srose.srose_family != AF_ROSE)
1104 if (sk->sk_state != TCP_ESTABLISHED)
1107 srose.srose_family = AF_ROSE;
1108 srose.srose_addr = rose->dest_addr;
1109 srose.srose_call = rose->dest_call;
1110 srose.srose_ndigis = rose->dest_ndigis;
1111 for (n = 0 ; n < rose->dest_ndigis ; n++)
1112 srose.srose_digis[n] = rose->dest_digis[n];
1115 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1117 /* Build a packet */
1118 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1119 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1121 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1124 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1127 * Put the data on the end
1129 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1131 skb_reset_transport_header(skb);
1134 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1141 * If the Q BIT Include socket option is in force, the first
1142 * byte of the user data is the logical value of the Q Bit.
1144 if (rose->qbitincl) {
1145 qbit = skb->data[0];
1150 * Push down the ROSE header
1152 asmptr = skb_push(skb, ROSE_MIN_LEN);
1154 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1156 /* Build a ROSE Network header */
1157 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1158 asmptr[1] = (rose->lci >> 0) & 0xFF;
1159 asmptr[2] = ROSE_DATA;
1162 asmptr[0] |= ROSE_Q_BIT;
1164 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1166 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1168 if (sk->sk_state != TCP_ESTABLISHED) {
1174 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1175 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1176 unsigned char header[ROSE_MIN_LEN];
1177 struct sk_buff *skbn;
1181 /* Save a copy of the Header */
1182 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1183 skb_pull(skb, ROSE_MIN_LEN);
1185 frontlen = skb_headroom(skb);
1187 while (skb->len > 0) {
1188 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1197 skb_reserve(skbn, frontlen);
1199 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1201 /* Copy the user data */
1202 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1205 /* Duplicate the Header */
1206 skb_push(skbn, ROSE_MIN_LEN);
1207 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1210 skbn->data[2] |= M_BIT;
1212 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1218 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1221 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1230 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1231 struct msghdr *msg, size_t size, int flags)
1233 struct sock *sk = sock->sk;
1234 struct rose_sock *rose = rose_sk(sk);
1235 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
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_iovec(skb, 0, msg->msg_iov, copied);
1271 if (srose != NULL) {
1272 srose->srose_family = AF_ROSE;
1273 srose->srose_addr = rose->dest_addr;
1274 srose->srose_call = rose->dest_call;
1275 srose->srose_ndigis = rose->dest_ndigis;
1276 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1277 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1278 for (n = 0 ; n < rose->dest_ndigis ; n++)
1279 full_srose->srose_digis[n] = rose->dest_digis[n];
1280 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1282 if (rose->dest_ndigis >= 1) {
1283 srose->srose_ndigis = 1;
1284 srose->srose_digi = rose->dest_digis[0];
1286 msg->msg_namelen = sizeof(struct sockaddr_rose);
1290 skb_free_datagram(sk, skb);
1296 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1298 struct sock *sk = sock->sk;
1299 struct rose_sock *rose = rose_sk(sk);
1300 void __user *argp = (void __user *)arg;
1305 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1308 return put_user(amount, (unsigned int __user *) argp);
1312 struct sk_buff *skb;
1314 /* These two are safe on a single CPU system as only user tasks fiddle here */
1315 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1317 return put_user(amount, (unsigned int __user *) argp);
1321 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1324 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1328 case SIOCGIFDSTADDR:
1329 case SIOCSIFDSTADDR:
1330 case SIOCGIFBRDADDR:
1331 case SIOCSIFBRDADDR:
1332 case SIOCGIFNETMASK:
1333 case SIOCSIFNETMASK:
1341 if (!capable(CAP_NET_ADMIN))
1343 return rose_rt_ioctl(cmd, argp);
1345 case SIOCRSGCAUSE: {
1346 struct rose_cause_struct rose_cause;
1347 rose_cause.cause = rose->cause;
1348 rose_cause.diagnostic = rose->diagnostic;
1349 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1352 case SIOCRSSCAUSE: {
1353 struct rose_cause_struct rose_cause;
1354 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1356 rose->cause = rose_cause.cause;
1357 rose->diagnostic = rose_cause.diagnostic;
1362 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1363 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1364 ax25_listen_release(&rose_callsign, NULL);
1365 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1367 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1368 return ax25_listen_register(&rose_callsign, NULL);
1373 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1376 if (rose->state == ROSE_STATE_5) {
1377 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1378 rose_start_idletimer(sk);
1379 rose->condition = 0x00;
1384 rose->state = ROSE_STATE_3;
1389 return -ENOIOCTLCMD;
1395 #ifdef CONFIG_PROC_FS
1396 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1397 __acquires(rose_list_lock)
1401 struct hlist_node *node;
1403 spin_lock_bh(&rose_list_lock);
1405 return SEQ_START_TOKEN;
1408 sk_for_each(s, node, &rose_list) {
1416 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1420 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1421 : sk_next((struct sock *)v);
1424 static void rose_info_stop(struct seq_file *seq, void *v)
1425 __releases(rose_list_lock)
1427 spin_unlock_bh(&rose_list_lock);
1430 static int rose_info_show(struct seq_file *seq, void *v)
1434 if (v == SEQ_START_TOKEN)
1436 "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");
1440 struct rose_sock *rose = rose_sk(s);
1441 const char *devname, *callsign;
1442 const struct net_device *dev = rose->device;
1447 devname = dev->name;
1449 seq_printf(seq, "%-10s %-9s ",
1450 rose2asc(&rose->dest_addr),
1451 ax2asc(buf, &rose->dest_call));
1453 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1454 callsign = "??????-?";
1456 callsign = ax2asc(buf, &rose->source_call);
1459 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1460 rose2asc(&rose->source_addr),
1464 (rose->neighbour) ? rose->neighbour->number : 0,
1469 ax25_display_timer(&rose->timer) / HZ,
1474 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1475 rose->idle / (60 * HZ),
1476 atomic_read(&s->sk_wmem_alloc),
1477 atomic_read(&s->sk_rmem_alloc),
1478 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1484 static const struct seq_operations rose_info_seqops = {
1485 .start = rose_info_start,
1486 .next = rose_info_next,
1487 .stop = rose_info_stop,
1488 .show = rose_info_show,
1491 static int rose_info_open(struct inode *inode, struct file *file)
1493 return seq_open(file, &rose_info_seqops);
1496 static const struct file_operations rose_info_fops = {
1497 .owner = THIS_MODULE,
1498 .open = rose_info_open,
1500 .llseek = seq_lseek,
1501 .release = seq_release,
1503 #endif /* CONFIG_PROC_FS */
1505 static struct net_proto_family rose_family_ops = {
1507 .create = rose_create,
1508 .owner = THIS_MODULE,
1511 static struct proto_ops rose_proto_ops = {
1513 .owner = THIS_MODULE,
1514 .release = rose_release,
1516 .connect = rose_connect,
1517 .socketpair = sock_no_socketpair,
1518 .accept = rose_accept,
1519 .getname = rose_getname,
1520 .poll = datagram_poll,
1521 .ioctl = rose_ioctl,
1522 .listen = rose_listen,
1523 .shutdown = sock_no_shutdown,
1524 .setsockopt = rose_setsockopt,
1525 .getsockopt = rose_getsockopt,
1526 .sendmsg = rose_sendmsg,
1527 .recvmsg = rose_recvmsg,
1528 .mmap = sock_no_mmap,
1529 .sendpage = sock_no_sendpage,
1532 static struct notifier_block rose_dev_notifier = {
1533 .notifier_call = rose_device_event,
1536 static struct net_device **dev_rose;
1538 static struct ax25_protocol rose_pid = {
1540 .func = rose_route_frame
1543 static struct ax25_linkfail rose_linkfail_notifier = {
1544 .func = rose_link_failed
1547 static int __init rose_proto_init(void)
1552 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1553 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1558 rc = proto_register(&rose_proto, 0);
1562 rose_callsign = null_ax25_address;
1564 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1565 if (dev_rose == NULL) {
1566 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1568 goto out_proto_unregister;
1571 for (i = 0; i < rose_ndevs; i++) {
1572 struct net_device *dev;
1573 char name[IFNAMSIZ];
1575 sprintf(name, "rose%d", i);
1576 dev = alloc_netdev(sizeof(struct net_device_stats),
1579 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1583 rc = register_netdev(dev);
1585 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1589 rose_set_lockdep_key(dev);
1593 sock_register(&rose_family_ops);
1594 register_netdevice_notifier(&rose_dev_notifier);
1596 ax25_register_pid(&rose_pid);
1597 ax25_linkfail_register(&rose_linkfail_notifier);
1599 #ifdef CONFIG_SYSCTL
1600 rose_register_sysctl();
1602 rose_loopback_init();
1604 rose_add_loopback_neigh();
1606 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1607 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1608 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1609 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1614 unregister_netdev(dev_rose[i]);
1615 free_netdev(dev_rose[i]);
1618 out_proto_unregister:
1619 proto_unregister(&rose_proto);
1622 module_init(rose_proto_init);
1624 module_param(rose_ndevs, int, 0);
1625 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1627 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1628 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1629 MODULE_LICENSE("GPL");
1630 MODULE_ALIAS_NETPROTO(PF_ROSE);
1632 static void __exit rose_exit(void)
1636 proc_net_remove(&init_net, "rose");
1637 proc_net_remove(&init_net, "rose_neigh");
1638 proc_net_remove(&init_net, "rose_nodes");
1639 proc_net_remove(&init_net, "rose_routes");
1640 rose_loopback_clear();
1644 ax25_protocol_release(AX25_P_ROSE);
1645 ax25_linkfail_release(&rose_linkfail_notifier);
1647 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1648 ax25_listen_release(&rose_callsign, NULL);
1650 #ifdef CONFIG_SYSCTL
1651 rose_unregister_sysctl();
1653 unregister_netdevice_notifier(&rose_dev_notifier);
1655 sock_unregister(PF_ROSE);
1657 for (i = 0; i < rose_ndevs; i++) {
1658 struct net_device *dev = dev_rose[i];
1661 unregister_netdev(dev);
1667 proto_unregister(&rose_proto);
1670 module_exit(rose_exit);