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;
79 * Convert a ROSE address into text.
81 const char *rose2asc(const rose_address *addr)
83 static char buffer[11];
85 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
86 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
87 addr->rose_addr[4] == 0x00) {
90 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
91 addr->rose_addr[1] & 0xFF,
92 addr->rose_addr[2] & 0xFF,
93 addr->rose_addr[3] & 0xFF,
94 addr->rose_addr[4] & 0xFF);
101 * Compare two ROSE addresses, 0 == equal.
103 int rosecmp(rose_address *addr1, rose_address *addr2)
107 for (i = 0; i < 5; i++)
108 if (addr1->rose_addr[i] != addr2->rose_addr[i])
115 * Compare two ROSE addresses for only mask digits, 0 == equal.
117 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
124 for (i = 0; i < mask; i++) {
128 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
131 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
140 * Socket removal during an interrupt is now safe.
142 static void rose_remove_socket(struct sock *sk)
144 spin_lock_bh(&rose_list_lock);
145 sk_del_node_init(sk);
146 spin_unlock_bh(&rose_list_lock);
150 * Kill all bound sockets on a broken link layer connection to a
151 * particular neighbour.
153 void rose_kill_by_neigh(struct rose_neigh *neigh)
156 struct hlist_node *node;
158 spin_lock_bh(&rose_list_lock);
159 sk_for_each(s, node, &rose_list) {
160 struct rose_sock *rose = rose_sk(s);
162 if (rose->neighbour == neigh) {
163 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
164 rose->neighbour->use--;
165 rose->neighbour = NULL;
168 spin_unlock_bh(&rose_list_lock);
172 * Kill all bound sockets on a dropped device.
174 static void rose_kill_by_device(struct net_device *dev)
177 struct hlist_node *node;
179 spin_lock_bh(&rose_list_lock);
180 sk_for_each(s, node, &rose_list) {
181 struct rose_sock *rose = rose_sk(s);
183 if (rose->device == dev) {
184 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
185 rose->neighbour->use--;
189 spin_unlock_bh(&rose_list_lock);
193 * Handle device status changes.
195 static int rose_device_event(struct notifier_block *this, unsigned long event,
198 struct net_device *dev = (struct net_device *)ptr;
200 if (dev->nd_net != &init_net)
203 if (event != NETDEV_DOWN)
208 rose_kill_by_device(dev);
211 rose_link_device_down(dev);
212 rose_rt_device_down(dev);
220 * Add a socket to the bound sockets list.
222 static void rose_insert_socket(struct sock *sk)
225 spin_lock_bh(&rose_list_lock);
226 sk_add_node(sk, &rose_list);
227 spin_unlock_bh(&rose_list_lock);
231 * Find a socket that wants to accept the Call Request we just
234 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
237 struct hlist_node *node;
239 spin_lock_bh(&rose_list_lock);
240 sk_for_each(s, node, &rose_list) {
241 struct rose_sock *rose = rose_sk(s);
243 if (!rosecmp(&rose->source_addr, addr) &&
244 !ax25cmp(&rose->source_call, call) &&
245 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
249 sk_for_each(s, node, &rose_list) {
250 struct rose_sock *rose = rose_sk(s);
252 if (!rosecmp(&rose->source_addr, addr) &&
253 !ax25cmp(&rose->source_call, &null_ax25_address) &&
254 s->sk_state == TCP_LISTEN)
259 spin_unlock_bh(&rose_list_lock);
264 * Find a connected ROSE socket given my LCI and device.
266 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
269 struct hlist_node *node;
271 spin_lock_bh(&rose_list_lock);
272 sk_for_each(s, node, &rose_list) {
273 struct rose_sock *rose = rose_sk(s);
275 if (rose->lci == lci && rose->neighbour == neigh)
280 spin_unlock_bh(&rose_list_lock);
285 * Find a unique LCI for a given device.
287 unsigned int rose_new_lci(struct rose_neigh *neigh)
291 if (neigh->dce_mode) {
292 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
293 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
296 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
297 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
307 void rose_destroy_socket(struct sock *);
310 * Handler for deferred kills.
312 static void rose_destroy_timer(unsigned long data)
314 rose_destroy_socket((struct sock *)data);
318 * This is called from user mode and the timers. Thus it protects itself
319 * against interrupt users but doesn't worry about being called during
320 * work. Once it is removed from the queue no interrupt or bottom half
321 * will touch it and we are (fairly 8-) ) safe.
323 void rose_destroy_socket(struct sock *sk)
327 rose_remove_socket(sk);
328 rose_stop_heartbeat(sk);
329 rose_stop_idletimer(sk);
332 rose_clear_queues(sk); /* Flush the queues */
334 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
335 if (skb->sk != sk) { /* A pending connection */
336 /* Queue the unaccepted socket for death */
337 sock_set_flag(skb->sk, SOCK_DEAD);
338 rose_start_heartbeat(skb->sk);
339 rose_sk(skb->sk)->state = ROSE_STATE_0;
345 if (atomic_read(&sk->sk_wmem_alloc) ||
346 atomic_read(&sk->sk_rmem_alloc)) {
347 /* Defer: outstanding buffers */
348 setup_timer(&sk->sk_timer, rose_destroy_timer,
350 sk->sk_timer.expires = jiffies + 10 * HZ;
351 add_timer(&sk->sk_timer);
357 * Handling for system calls applied via the various interfaces to a
358 * ROSE socket object.
361 static int rose_setsockopt(struct socket *sock, int level, int optname,
362 char __user *optval, int optlen)
364 struct sock *sk = sock->sk;
365 struct rose_sock *rose = rose_sk(sk);
368 if (level != SOL_ROSE)
371 if (optlen < sizeof(int))
374 if (get_user(opt, (int __user *)optval))
379 rose->defer = opt ? 1 : 0;
409 rose->idle = opt * 60 * HZ;
413 rose->qbitincl = opt ? 1 : 0;
421 static int rose_getsockopt(struct socket *sock, int level, int optname,
422 char __user *optval, int __user *optlen)
424 struct sock *sk = sock->sk;
425 struct rose_sock *rose = rose_sk(sk);
429 if (level != SOL_ROSE)
432 if (get_user(len, optlen))
460 val = rose->idle / (60 * HZ);
464 val = rose->qbitincl;
471 len = min_t(unsigned int, len, sizeof(int));
473 if (put_user(len, optlen))
476 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
479 static int rose_listen(struct socket *sock, int backlog)
481 struct sock *sk = sock->sk;
483 if (sk->sk_state != TCP_LISTEN) {
484 struct rose_sock *rose = rose_sk(sk);
486 rose->dest_ndigis = 0;
487 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
488 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
489 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
490 sk->sk_max_ack_backlog = backlog;
491 sk->sk_state = TCP_LISTEN;
498 static struct proto rose_proto = {
500 .owner = THIS_MODULE,
501 .obj_size = sizeof(struct rose_sock),
504 static int rose_create(struct net *net, struct socket *sock, int protocol)
507 struct rose_sock *rose;
509 if (net != &init_net)
510 return -EAFNOSUPPORT;
512 if (sock->type != SOCK_SEQPACKET || protocol != 0)
513 return -ESOCKTNOSUPPORT;
515 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
521 sock_init_data(sock, sk);
523 skb_queue_head_init(&rose->ack_queue);
525 skb_queue_head_init(&rose->frag_queue);
529 sock->ops = &rose_proto_ops;
530 sk->sk_protocol = protocol;
532 init_timer(&rose->timer);
533 init_timer(&rose->idletimer);
535 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
536 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
537 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
538 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
539 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
541 rose->state = ROSE_STATE_0;
546 static struct sock *rose_make_new(struct sock *osk)
549 struct rose_sock *rose, *orose;
551 if (osk->sk_type != SOCK_SEQPACKET)
554 sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto);
560 sock_init_data(NULL, sk);
562 skb_queue_head_init(&rose->ack_queue);
564 skb_queue_head_init(&rose->frag_queue);
568 sk->sk_type = osk->sk_type;
569 sk->sk_socket = osk->sk_socket;
570 sk->sk_priority = osk->sk_priority;
571 sk->sk_protocol = osk->sk_protocol;
572 sk->sk_rcvbuf = osk->sk_rcvbuf;
573 sk->sk_sndbuf = osk->sk_sndbuf;
574 sk->sk_state = TCP_ESTABLISHED;
575 sk->sk_sleep = osk->sk_sleep;
576 sock_copy_flags(sk, osk);
578 init_timer(&rose->timer);
579 init_timer(&rose->idletimer);
581 orose = rose_sk(osk);
582 rose->t1 = orose->t1;
583 rose->t2 = orose->t2;
584 rose->t3 = orose->t3;
585 rose->hb = orose->hb;
586 rose->idle = orose->idle;
587 rose->defer = orose->defer;
588 rose->device = orose->device;
589 rose->qbitincl = orose->qbitincl;
594 static int rose_release(struct socket *sock)
596 struct sock *sk = sock->sk;
597 struct rose_sock *rose;
599 if (sk == NULL) return 0;
603 switch (rose->state) {
605 rose_disconnect(sk, 0, -1, -1);
606 rose_destroy_socket(sk);
610 rose->neighbour->use--;
611 rose_disconnect(sk, 0, -1, -1);
612 rose_destroy_socket(sk);
619 rose_clear_queues(sk);
620 rose_stop_idletimer(sk);
621 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
622 rose_start_t3timer(sk);
623 rose->state = ROSE_STATE_2;
624 sk->sk_state = TCP_CLOSE;
625 sk->sk_shutdown |= SEND_SHUTDOWN;
626 sk->sk_state_change(sk);
627 sock_set_flag(sk, SOCK_DEAD);
628 sock_set_flag(sk, SOCK_DESTROY);
640 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
642 struct sock *sk = sock->sk;
643 struct rose_sock *rose = rose_sk(sk);
644 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
645 struct net_device *dev;
646 ax25_address *source;
647 ax25_uid_assoc *user;
650 if (!sock_flag(sk, SOCK_ZAPPED))
653 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
656 if (addr->srose_family != AF_ROSE)
659 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
662 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
665 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
666 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
667 return -EADDRNOTAVAIL;
670 source = &addr->srose_call;
672 user = ax25_findbyuid(current->euid);
674 rose->source_call = user->call;
677 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
679 rose->source_call = *source;
682 rose->source_addr = addr->srose_addr;
684 rose->source_ndigis = addr->srose_ndigis;
686 if (addr_len == sizeof(struct full_sockaddr_rose)) {
687 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
688 for (n = 0 ; n < addr->srose_ndigis ; n++)
689 rose->source_digis[n] = full_addr->srose_digis[n];
691 if (rose->source_ndigis == 1) {
692 rose->source_digis[0] = addr->srose_digi;
696 rose_insert_socket(sk);
698 sock_reset_flag(sk, SOCK_ZAPPED);
699 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
703 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
705 struct sock *sk = sock->sk;
706 struct rose_sock *rose = rose_sk(sk);
707 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
708 unsigned char cause, diagnostic;
709 struct net_device *dev;
710 ax25_uid_assoc *user;
713 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
716 if (addr->srose_family != AF_ROSE)
719 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
722 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
725 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
726 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
731 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
732 /* Connect completed during a ERESTARTSYS event */
733 sock->state = SS_CONNECTED;
737 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
738 sock->state = SS_UNCONNECTED;
743 if (sk->sk_state == TCP_ESTABLISHED) {
744 /* No reconnect on a seqpacket socket */
749 sk->sk_state = TCP_CLOSE;
750 sock->state = SS_UNCONNECTED;
752 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
754 if (!rose->neighbour)
757 rose->lci = rose_new_lci(rose->neighbour);
763 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
764 sock_reset_flag(sk, SOCK_ZAPPED);
766 if ((dev = rose_dev_first()) == NULL) {
771 user = ax25_findbyuid(current->euid);
777 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
778 rose->source_call = user->call;
782 rose_insert_socket(sk); /* Finish the bind */
785 rose->dest_addr = addr->srose_addr;
786 rose->dest_call = addr->srose_call;
787 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
788 rose->dest_ndigis = addr->srose_ndigis;
790 if (addr_len == sizeof(struct full_sockaddr_rose)) {
791 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
792 for (n = 0 ; n < addr->srose_ndigis ; n++)
793 rose->dest_digis[n] = full_addr->srose_digis[n];
795 if (rose->dest_ndigis == 1) {
796 rose->dest_digis[0] = addr->srose_digi;
800 /* Move to connecting socket, start sending Connect Requests */
801 sock->state = SS_CONNECTING;
802 sk->sk_state = TCP_SYN_SENT;
804 rose->state = ROSE_STATE_1;
806 rose->neighbour->use++;
808 rose_write_internal(sk, ROSE_CALL_REQUEST);
809 rose_start_heartbeat(sk);
810 rose_start_t1timer(sk);
813 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
819 * A Connect Ack with Choke or timeout or failed routing will go to
822 if (sk->sk_state == TCP_SYN_SENT) {
826 prepare_to_wait(sk->sk_sleep, &wait,
828 if (sk->sk_state != TCP_SYN_SENT)
830 if (!signal_pending(current)) {
839 finish_wait(sk->sk_sleep, &wait);
845 if (sk->sk_state != TCP_ESTABLISHED) {
846 /* Try next neighbour */
847 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
849 goto rose_try_next_neigh;
851 /* No more neighbours */
852 sock->state = SS_UNCONNECTED;
853 err = sock_error(sk); /* Always set at this point */
857 sock->state = SS_CONNECTED;
865 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
873 if ((sk = sock->sk) == NULL)
877 if (sk->sk_type != SOCK_SEQPACKET) {
882 if (sk->sk_state != TCP_LISTEN) {
888 * The write queue this time is holding sockets ready to use
889 * hooked into the SABM we saved
892 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
894 skb = skb_dequeue(&sk->sk_receive_queue);
898 if (flags & O_NONBLOCK) {
902 if (!signal_pending(current)) {
911 finish_wait(sk->sk_sleep, &wait);
916 newsk->sk_socket = newsock;
917 newsk->sk_sleep = &newsock->wait;
919 /* Now attach up the new socket */
922 sk->sk_ack_backlog--;
931 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
932 int *uaddr_len, int peer)
934 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
935 struct sock *sk = sock->sk;
936 struct rose_sock *rose = rose_sk(sk);
940 if (sk->sk_state != TCP_ESTABLISHED)
942 srose->srose_family = AF_ROSE;
943 srose->srose_addr = rose->dest_addr;
944 srose->srose_call = rose->dest_call;
945 srose->srose_ndigis = rose->dest_ndigis;
946 for (n = 0; n < rose->dest_ndigis; n++)
947 srose->srose_digis[n] = rose->dest_digis[n];
949 srose->srose_family = AF_ROSE;
950 srose->srose_addr = rose->source_addr;
951 srose->srose_call = rose->source_call;
952 srose->srose_ndigis = rose->source_ndigis;
953 for (n = 0; n < rose->source_ndigis; n++)
954 srose->srose_digis[n] = rose->source_digis[n];
957 *uaddr_len = sizeof(struct full_sockaddr_rose);
961 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
965 struct rose_sock *make_rose;
966 struct rose_facilities_struct facilities;
969 skb->sk = NULL; /* Initially we don't know who it's for */
972 * skb->data points to the rose frame start
974 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
976 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
977 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
978 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
979 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
983 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
986 * We can't accept the Call Request.
988 if (sk == NULL || sk_acceptq_is_full(sk) ||
989 (make = rose_make_new(sk)) == NULL) {
990 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
995 make->sk_state = TCP_ESTABLISHED;
996 make_rose = rose_sk(make);
998 make_rose->lci = lci;
999 make_rose->dest_addr = facilities.dest_addr;
1000 make_rose->dest_call = facilities.dest_call;
1001 make_rose->dest_ndigis = facilities.dest_ndigis;
1002 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1003 make_rose->dest_digis[n] = facilities.dest_digis[n];
1004 make_rose->source_addr = facilities.source_addr;
1005 make_rose->source_call = facilities.source_call;
1006 make_rose->source_ndigis = facilities.source_ndigis;
1007 for (n = 0 ; n < facilities.source_ndigis ; n++)
1008 make_rose->source_digis[n]= facilities.source_digis[n];
1009 make_rose->neighbour = neigh;
1010 make_rose->device = dev;
1011 make_rose->facilities = facilities;
1013 make_rose->neighbour->use++;
1015 if (rose_sk(sk)->defer) {
1016 make_rose->state = ROSE_STATE_5;
1018 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1019 make_rose->state = ROSE_STATE_3;
1020 rose_start_idletimer(make);
1023 make_rose->condition = 0x00;
1028 sk->sk_ack_backlog++;
1030 rose_insert_socket(make);
1032 skb_queue_head(&sk->sk_receive_queue, skb);
1034 rose_start_heartbeat(make);
1036 if (!sock_flag(sk, SOCK_DEAD))
1037 sk->sk_data_ready(sk, skb->len);
1042 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1043 struct msghdr *msg, size_t len)
1045 struct sock *sk = sock->sk;
1046 struct rose_sock *rose = rose_sk(sk);
1047 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1049 struct full_sockaddr_rose srose;
1050 struct sk_buff *skb;
1051 unsigned char *asmptr;
1052 int n, size, qbit = 0;
1054 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1057 if (sock_flag(sk, SOCK_ZAPPED))
1058 return -EADDRNOTAVAIL;
1060 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1061 send_sig(SIGPIPE, current, 0);
1065 if (rose->neighbour == NULL || rose->device == NULL)
1066 return -ENETUNREACH;
1068 if (usrose != NULL) {
1069 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1071 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1072 memcpy(&srose, usrose, msg->msg_namelen);
1073 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1074 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1076 if (srose.srose_ndigis != rose->dest_ndigis)
1078 if (srose.srose_ndigis == rose->dest_ndigis) {
1079 for (n = 0 ; n < srose.srose_ndigis ; n++)
1080 if (ax25cmp(&rose->dest_digis[n],
1081 &srose.srose_digis[n]))
1084 if (srose.srose_family != AF_ROSE)
1087 if (sk->sk_state != TCP_ESTABLISHED)
1090 srose.srose_family = AF_ROSE;
1091 srose.srose_addr = rose->dest_addr;
1092 srose.srose_call = rose->dest_call;
1093 srose.srose_ndigis = rose->dest_ndigis;
1094 for (n = 0 ; n < rose->dest_ndigis ; n++)
1095 srose.srose_digis[n] = rose->dest_digis[n];
1098 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1100 /* Build a packet */
1101 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1102 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1104 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1107 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1110 * Put the data on the end
1112 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1114 skb_reset_transport_header(skb);
1117 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1124 * If the Q BIT Include socket option is in force, the first
1125 * byte of the user data is the logical value of the Q Bit.
1127 if (rose->qbitincl) {
1128 qbit = skb->data[0];
1133 * Push down the ROSE header
1135 asmptr = skb_push(skb, ROSE_MIN_LEN);
1137 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1139 /* Build a ROSE Network header */
1140 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1141 asmptr[1] = (rose->lci >> 0) & 0xFF;
1142 asmptr[2] = ROSE_DATA;
1145 asmptr[0] |= ROSE_Q_BIT;
1147 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1149 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1151 if (sk->sk_state != TCP_ESTABLISHED) {
1157 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1158 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1159 unsigned char header[ROSE_MIN_LEN];
1160 struct sk_buff *skbn;
1164 /* Save a copy of the Header */
1165 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1166 skb_pull(skb, ROSE_MIN_LEN);
1168 frontlen = skb_headroom(skb);
1170 while (skb->len > 0) {
1171 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1180 skb_reserve(skbn, frontlen);
1182 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184 /* Copy the user data */
1185 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1188 /* Duplicate the Header */
1189 skb_push(skbn, ROSE_MIN_LEN);
1190 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1193 skbn->data[2] |= M_BIT;
1195 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1201 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1204 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1213 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1214 struct msghdr *msg, size_t size, int flags)
1216 struct sock *sk = sock->sk;
1217 struct rose_sock *rose = rose_sk(sk);
1218 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1220 unsigned char *asmptr;
1221 struct sk_buff *skb;
1225 * This works for seqpacket too. The receiver has ordered the queue for
1226 * us! We do one quick check first though
1228 if (sk->sk_state != TCP_ESTABLISHED)
1231 /* Now we can treat all alike */
1232 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1235 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1237 skb_pull(skb, ROSE_MIN_LEN);
1239 if (rose->qbitincl) {
1240 asmptr = skb_push(skb, 1);
1244 skb_reset_transport_header(skb);
1247 if (copied > size) {
1249 msg->msg_flags |= MSG_TRUNC;
1252 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1254 if (srose != NULL) {
1255 srose->srose_family = AF_ROSE;
1256 srose->srose_addr = rose->dest_addr;
1257 srose->srose_call = rose->dest_call;
1258 srose->srose_ndigis = rose->dest_ndigis;
1259 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1260 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1261 for (n = 0 ; n < rose->dest_ndigis ; n++)
1262 full_srose->srose_digis[n] = rose->dest_digis[n];
1263 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1265 if (rose->dest_ndigis >= 1) {
1266 srose->srose_ndigis = 1;
1267 srose->srose_digi = rose->dest_digis[0];
1269 msg->msg_namelen = sizeof(struct sockaddr_rose);
1273 skb_free_datagram(sk, skb);
1279 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1281 struct sock *sk = sock->sk;
1282 struct rose_sock *rose = rose_sk(sk);
1283 void __user *argp = (void __user *)arg;
1288 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1291 return put_user(amount, (unsigned int __user *) argp);
1295 struct sk_buff *skb;
1297 /* These two are safe on a single CPU system as only user tasks fiddle here */
1298 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1300 return put_user(amount, (unsigned int __user *) argp);
1304 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1307 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1311 case SIOCGIFDSTADDR:
1312 case SIOCSIFDSTADDR:
1313 case SIOCGIFBRDADDR:
1314 case SIOCSIFBRDADDR:
1315 case SIOCGIFNETMASK:
1316 case SIOCSIFNETMASK:
1324 if (!capable(CAP_NET_ADMIN))
1326 return rose_rt_ioctl(cmd, argp);
1328 case SIOCRSGCAUSE: {
1329 struct rose_cause_struct rose_cause;
1330 rose_cause.cause = rose->cause;
1331 rose_cause.diagnostic = rose->diagnostic;
1332 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1335 case SIOCRSSCAUSE: {
1336 struct rose_cause_struct rose_cause;
1337 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1339 rose->cause = rose_cause.cause;
1340 rose->diagnostic = rose_cause.diagnostic;
1345 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1346 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1347 ax25_listen_release(&rose_callsign, NULL);
1348 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1350 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1351 return ax25_listen_register(&rose_callsign, NULL);
1356 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1359 if (rose->state == ROSE_STATE_5) {
1360 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1361 rose_start_idletimer(sk);
1362 rose->condition = 0x00;
1367 rose->state = ROSE_STATE_3;
1372 return -ENOIOCTLCMD;
1378 #ifdef CONFIG_PROC_FS
1379 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1380 __acquires(rose_list_lock)
1384 struct hlist_node *node;
1386 spin_lock_bh(&rose_list_lock);
1388 return SEQ_START_TOKEN;
1391 sk_for_each(s, node, &rose_list) {
1399 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1403 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1404 : sk_next((struct sock *)v);
1407 static void rose_info_stop(struct seq_file *seq, void *v)
1408 __releases(rose_list_lock)
1410 spin_unlock_bh(&rose_list_lock);
1413 static int rose_info_show(struct seq_file *seq, void *v)
1417 if (v == SEQ_START_TOKEN)
1419 "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");
1423 struct rose_sock *rose = rose_sk(s);
1424 const char *devname, *callsign;
1425 const struct net_device *dev = rose->device;
1430 devname = dev->name;
1432 seq_printf(seq, "%-10s %-9s ",
1433 rose2asc(&rose->dest_addr),
1434 ax2asc(buf, &rose->dest_call));
1436 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1437 callsign = "??????-?";
1439 callsign = ax2asc(buf, &rose->source_call);
1442 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1443 rose2asc(&rose->source_addr),
1447 (rose->neighbour) ? rose->neighbour->number : 0,
1452 ax25_display_timer(&rose->timer) / HZ,
1457 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1458 rose->idle / (60 * HZ),
1459 atomic_read(&s->sk_wmem_alloc),
1460 atomic_read(&s->sk_rmem_alloc),
1461 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1467 static const struct seq_operations rose_info_seqops = {
1468 .start = rose_info_start,
1469 .next = rose_info_next,
1470 .stop = rose_info_stop,
1471 .show = rose_info_show,
1474 static int rose_info_open(struct inode *inode, struct file *file)
1476 return seq_open(file, &rose_info_seqops);
1479 static const struct file_operations rose_info_fops = {
1480 .owner = THIS_MODULE,
1481 .open = rose_info_open,
1483 .llseek = seq_lseek,
1484 .release = seq_release,
1486 #endif /* CONFIG_PROC_FS */
1488 static struct net_proto_family rose_family_ops = {
1490 .create = rose_create,
1491 .owner = THIS_MODULE,
1494 static struct proto_ops rose_proto_ops = {
1496 .owner = THIS_MODULE,
1497 .release = rose_release,
1499 .connect = rose_connect,
1500 .socketpair = sock_no_socketpair,
1501 .accept = rose_accept,
1502 .getname = rose_getname,
1503 .poll = datagram_poll,
1504 .ioctl = rose_ioctl,
1505 .listen = rose_listen,
1506 .shutdown = sock_no_shutdown,
1507 .setsockopt = rose_setsockopt,
1508 .getsockopt = rose_getsockopt,
1509 .sendmsg = rose_sendmsg,
1510 .recvmsg = rose_recvmsg,
1511 .mmap = sock_no_mmap,
1512 .sendpage = sock_no_sendpage,
1515 static struct notifier_block rose_dev_notifier = {
1516 .notifier_call = rose_device_event,
1519 static struct net_device **dev_rose;
1521 static struct ax25_protocol rose_pid = {
1523 .func = rose_route_frame
1526 static struct ax25_linkfail rose_linkfail_notifier = {
1527 .func = rose_link_failed
1530 static int __init rose_proto_init(void)
1535 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1536 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1541 rc = proto_register(&rose_proto, 0);
1545 rose_callsign = null_ax25_address;
1547 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1548 if (dev_rose == NULL) {
1549 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1551 goto out_proto_unregister;
1554 for (i = 0; i < rose_ndevs; i++) {
1555 struct net_device *dev;
1556 char name[IFNAMSIZ];
1558 sprintf(name, "rose%d", i);
1559 dev = alloc_netdev(sizeof(struct net_device_stats),
1562 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1566 rc = register_netdev(dev);
1568 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1572 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1576 sock_register(&rose_family_ops);
1577 register_netdevice_notifier(&rose_dev_notifier);
1579 ax25_register_pid(&rose_pid);
1580 ax25_linkfail_register(&rose_linkfail_notifier);
1582 #ifdef CONFIG_SYSCTL
1583 rose_register_sysctl();
1585 rose_loopback_init();
1587 rose_add_loopback_neigh();
1589 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1590 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1591 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1592 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1597 unregister_netdev(dev_rose[i]);
1598 free_netdev(dev_rose[i]);
1601 out_proto_unregister:
1602 proto_unregister(&rose_proto);
1605 module_init(rose_proto_init);
1607 module_param(rose_ndevs, int, 0);
1608 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1610 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1611 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1612 MODULE_LICENSE("GPL");
1613 MODULE_ALIAS_NETPROTO(PF_ROSE);
1615 static void __exit rose_exit(void)
1619 proc_net_remove(&init_net, "rose");
1620 proc_net_remove(&init_net, "rose_neigh");
1621 proc_net_remove(&init_net, "rose_nodes");
1622 proc_net_remove(&init_net, "rose_routes");
1623 rose_loopback_clear();
1627 ax25_protocol_release(AX25_P_ROSE);
1628 ax25_linkfail_release(&rose_linkfail_notifier);
1630 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1631 ax25_listen_release(&rose_callsign, NULL);
1633 #ifdef CONFIG_SYSCTL
1634 rose_unregister_sysctl();
1636 unregister_netdevice_notifier(&rose_dev_notifier);
1638 sock_unregister(PF_ROSE);
1640 for (i = 0; i < rose_ndevs; i++) {
1641 struct net_device *dev = dev_rose[i];
1644 unregister_netdev(dev);
1650 proto_unregister(&rose_proto);
1653 module_exit(rose_exit);