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 Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/capability.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/socket.h>
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
20 #include <linux/timer.h>
21 #include <linux/string.h>
22 #include <linux/sockios.h>
23 #include <linux/net.h>
24 #include <linux/stat.h>
26 #include <linux/inet.h>
27 #include <linux/netdevice.h>
28 #include <linux/if_arp.h>
29 #include <linux/skbuff.h>
30 #include <net/net_namespace.h>
32 #include <asm/uaccess.h>
33 #include <asm/system.h>
34 #include <linux/fcntl.h>
35 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
37 #include <linux/interrupt.h>
38 #include <linux/notifier.h>
39 #include <net/netrom.h>
40 #include <linux/proc_fs.h>
41 #include <linux/seq_file.h>
43 #include <net/tcp_states.h>
45 #include <linux/init.h>
47 static int nr_ndevs = 4;
49 int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
50 int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
51 int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
52 int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
53 int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
54 int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
55 int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
56 int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
57 int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
58 int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
59 int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
60 int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
62 static unsigned short circuit = 0x101;
64 static HLIST_HEAD(nr_list);
65 static DEFINE_SPINLOCK(nr_list_lock);
67 static const struct proto_ops nr_proto_ops;
70 * NETROM network devices are virtual network devices encapsulating NETROM
71 * frames into AX.25 which will be sent through an AX.25 device, so form a
72 * special "super class" of normal net devices; split their locks off into a
73 * separate class since they always nest.
75 static struct lock_class_key nr_netdev_xmit_lock_key;
78 * Socket removal during an interrupt is now safe.
80 static void nr_remove_socket(struct sock *sk)
82 spin_lock_bh(&nr_list_lock);
84 spin_unlock_bh(&nr_list_lock);
88 * Kill all bound sockets on a dropped device.
90 static void nr_kill_by_device(struct net_device *dev)
93 struct hlist_node *node;
95 spin_lock_bh(&nr_list_lock);
96 sk_for_each(s, node, &nr_list)
97 if (nr_sk(s)->device == dev)
98 nr_disconnect(s, ENETUNREACH);
99 spin_unlock_bh(&nr_list_lock);
103 * Handle device status changes.
105 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
107 struct net_device *dev = (struct net_device *)ptr;
109 if (event != NETDEV_DOWN)
112 nr_kill_by_device(dev);
113 nr_rt_device_down(dev);
119 * Add a socket to the bound sockets list.
121 static void nr_insert_socket(struct sock *sk)
123 spin_lock_bh(&nr_list_lock);
124 sk_add_node(sk, &nr_list);
125 spin_unlock_bh(&nr_list_lock);
129 * Find a socket that wants to accept the Connect Request we just
132 static struct sock *nr_find_listener(ax25_address *addr)
135 struct hlist_node *node;
137 spin_lock_bh(&nr_list_lock);
138 sk_for_each(s, node, &nr_list)
139 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
140 s->sk_state == TCP_LISTEN) {
146 spin_unlock_bh(&nr_list_lock);
151 * Find a connected NET/ROM socket given my circuit IDs.
153 static struct sock *nr_find_socket(unsigned char index, unsigned char id)
156 struct hlist_node *node;
158 spin_lock_bh(&nr_list_lock);
159 sk_for_each(s, node, &nr_list) {
160 struct nr_sock *nr = nr_sk(s);
162 if (nr->my_index == index && nr->my_id == id) {
169 spin_unlock_bh(&nr_list_lock);
174 * Find a connected NET/ROM socket given their circuit IDs.
176 static struct sock *nr_find_peer(unsigned char index, unsigned char id,
180 struct hlist_node *node;
182 spin_lock_bh(&nr_list_lock);
183 sk_for_each(s, node, &nr_list) {
184 struct nr_sock *nr = nr_sk(s);
186 if (nr->your_index == index && nr->your_id == id &&
187 !ax25cmp(&nr->dest_addr, dest)) {
194 spin_unlock_bh(&nr_list_lock);
199 * Find next free circuit ID.
201 static unsigned short nr_find_next_circuit(void)
203 unsigned short id = circuit;
211 if (i != 0 && j != 0) {
212 if ((sk=nr_find_socket(i, j)) == NULL)
226 void nr_destroy_socket(struct sock *);
229 * Handler for deferred kills.
231 static void nr_destroy_timer(unsigned long data)
233 struct sock *sk=(struct sock *)data;
236 nr_destroy_socket(sk);
242 * This is called from user mode and the timers. Thus it protects itself
243 * against interrupt users but doesn't worry about being called during
244 * work. Once it is removed from the queue no interrupt or bottom half
245 * will touch it and we are (fairly 8-) ) safe.
247 void nr_destroy_socket(struct sock *sk)
251 nr_remove_socket(sk);
253 nr_stop_heartbeat(sk);
257 nr_stop_idletimer(sk);
259 nr_clear_queues(sk); /* Flush the queues */
261 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
262 if (skb->sk != sk) { /* A pending connection */
263 /* Queue the unaccepted socket for death */
264 sock_set_flag(skb->sk, SOCK_DEAD);
265 nr_start_heartbeat(skb->sk);
266 nr_sk(skb->sk)->state = NR_STATE_0;
272 if (atomic_read(&sk->sk_wmem_alloc) ||
273 atomic_read(&sk->sk_rmem_alloc)) {
274 /* Defer: outstanding buffers */
275 sk->sk_timer.function = nr_destroy_timer;
276 sk->sk_timer.expires = jiffies + 2 * HZ;
277 add_timer(&sk->sk_timer);
283 * Handling for system calls applied via the various interfaces to a
284 * NET/ROM socket object.
287 static int nr_setsockopt(struct socket *sock, int level, int optname,
288 char __user *optval, int optlen)
290 struct sock *sk = sock->sk;
291 struct nr_sock *nr = nr_sk(sk);
294 if (level != SOL_NETROM)
297 if (optlen < sizeof(int))
300 if (get_user(opt, (int __user *)optval))
317 if (opt < 1 || opt > 31)
331 nr->idle = opt * 60 * HZ;
339 static int nr_getsockopt(struct socket *sock, int level, int optname,
340 char __user *optval, int __user *optlen)
342 struct sock *sk = sock->sk;
343 struct nr_sock *nr = nr_sk(sk);
347 if (level != SOL_NETROM)
350 if (get_user(len, optlen))
374 val = nr->idle / (60 * HZ);
381 len = min_t(unsigned int, len, sizeof(int));
383 if (put_user(len, optlen))
386 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
389 static int nr_listen(struct socket *sock, int backlog)
391 struct sock *sk = sock->sk;
394 if (sk->sk_state != TCP_LISTEN) {
395 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
396 sk->sk_max_ack_backlog = backlog;
397 sk->sk_state = TCP_LISTEN;
406 static struct proto nr_proto = {
408 .owner = THIS_MODULE,
409 .obj_size = sizeof(struct nr_sock),
412 static int nr_create(struct socket *sock, int protocol)
417 if (sock->type != SOCK_SEQPACKET || protocol != 0)
418 return -ESOCKTNOSUPPORT;
420 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
425 sock_init_data(sock, sk);
427 sock->ops = &nr_proto_ops;
428 sk->sk_protocol = protocol;
430 skb_queue_head_init(&nr->ack_queue);
431 skb_queue_head_init(&nr->reseq_queue);
432 skb_queue_head_init(&nr->frag_queue);
437 msecs_to_jiffies(sysctl_netrom_transport_timeout);
439 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
441 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
443 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
445 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
446 nr->window = sysctl_netrom_transport_requested_window_size;
449 nr->state = NR_STATE_0;
454 static struct sock *nr_make_new(struct sock *osk)
457 struct nr_sock *nr, *onr;
459 if (osk->sk_type != SOCK_SEQPACKET)
462 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
467 sock_init_data(NULL, sk);
469 sk->sk_type = osk->sk_type;
470 sk->sk_socket = osk->sk_socket;
471 sk->sk_priority = osk->sk_priority;
472 sk->sk_protocol = osk->sk_protocol;
473 sk->sk_rcvbuf = osk->sk_rcvbuf;
474 sk->sk_sndbuf = osk->sk_sndbuf;
475 sk->sk_state = TCP_ESTABLISHED;
476 sk->sk_sleep = osk->sk_sleep;
477 sock_copy_flags(sk, osk);
479 skb_queue_head_init(&nr->ack_queue);
480 skb_queue_head_init(&nr->reseq_queue);
481 skb_queue_head_init(&nr->frag_queue);
491 nr->idle = onr->idle;
492 nr->window = onr->window;
494 nr->device = onr->device;
495 nr->bpqext = onr->bpqext;
500 static int nr_release(struct socket *sock)
502 struct sock *sk = sock->sk;
505 if (sk == NULL) return 0;
515 nr_disconnect(sk, 0);
516 nr_destroy_socket(sk);
522 nr_write_internal(sk, NR_DISCREQ);
523 nr_start_t1timer(sk);
526 nr_stop_idletimer(sk);
527 nr->state = NR_STATE_2;
528 sk->sk_state = TCP_CLOSE;
529 sk->sk_shutdown |= SEND_SHUTDOWN;
530 sk->sk_state_change(sk);
532 sock_set_flag(sk, SOCK_DESTROY);
533 sk->sk_socket = NULL;
537 sk->sk_socket = NULL;
548 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
550 struct sock *sk = sock->sk;
551 struct nr_sock *nr = nr_sk(sk);
552 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
553 struct net_device *dev;
554 ax25_uid_assoc *user;
555 ax25_address *source;
558 if (!sock_flag(sk, SOCK_ZAPPED)) {
562 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
566 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
570 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
574 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
575 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
577 return -EADDRNOTAVAIL;
581 * Only the super user can set an arbitrary user callsign.
583 if (addr->fsa_ax25.sax25_ndigis == 1) {
584 if (!capable(CAP_NET_BIND_SERVICE)) {
589 nr->user_addr = addr->fsa_digipeater[0];
590 nr->source_addr = addr->fsa_ax25.sax25_call;
592 source = &addr->fsa_ax25.sax25_call;
594 user = ax25_findbyuid(current->euid);
596 nr->user_addr = user->call;
599 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
604 nr->user_addr = *source;
607 nr->source_addr = *source;
611 nr_insert_socket(sk);
613 sock_reset_flag(sk, SOCK_ZAPPED);
616 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
620 static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
621 int addr_len, int flags)
623 struct sock *sk = sock->sk;
624 struct nr_sock *nr = nr_sk(sk);
625 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
626 ax25_address *source = NULL;
627 ax25_uid_assoc *user;
628 struct net_device *dev;
632 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
633 sock->state = SS_CONNECTED;
634 goto out_release; /* Connect completed during a ERESTARTSYS event */
637 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
638 sock->state = SS_UNCONNECTED;
643 if (sk->sk_state == TCP_ESTABLISHED) {
644 err = -EISCONN; /* No reconnect on a seqpacket socket */
648 sk->sk_state = TCP_CLOSE;
649 sock->state = SS_UNCONNECTED;
651 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
655 if (addr->sax25_family != AF_NETROM) {
659 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
660 sock_reset_flag(sk, SOCK_ZAPPED);
662 if ((dev = nr_dev_first()) == NULL) {
666 source = (ax25_address *)dev->dev_addr;
668 user = ax25_findbyuid(current->euid);
670 nr->user_addr = user->call;
673 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
678 nr->user_addr = *source;
681 nr->source_addr = *source;
685 nr_insert_socket(sk); /* Finish the bind */
688 nr->dest_addr = addr->sax25_call;
691 circuit = nr_find_next_circuit();
694 nr->my_index = circuit / 256;
695 nr->my_id = circuit % 256;
699 /* Move to connecting socket, start sending Connect Requests */
700 sock->state = SS_CONNECTING;
701 sk->sk_state = TCP_SYN_SENT;
703 nr_establish_data_link(sk);
705 nr->state = NR_STATE_1;
707 nr_start_heartbeat(sk);
710 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
716 * A Connect Ack with Choke or timeout or failed routing will go to
719 if (sk->sk_state == TCP_SYN_SENT) {
723 prepare_to_wait(sk->sk_sleep, &wait,
725 if (sk->sk_state != TCP_SYN_SENT)
727 if (!signal_pending(current)) {
736 finish_wait(sk->sk_sleep, &wait);
741 if (sk->sk_state != TCP_ESTABLISHED) {
742 sock->state = SS_UNCONNECTED;
743 err = sock_error(sk); /* Always set at this point */
747 sock->state = SS_CONNECTED;
755 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
763 if ((sk = sock->sk) == NULL)
767 if (sk->sk_type != SOCK_SEQPACKET) {
772 if (sk->sk_state != TCP_LISTEN) {
778 * The write queue this time is holding sockets ready to use
779 * hooked into the SABM we saved
782 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
783 skb = skb_dequeue(&sk->sk_receive_queue);
787 if (flags & O_NONBLOCK) {
791 if (!signal_pending(current)) {
800 finish_wait(sk->sk_sleep, &wait);
805 newsk->sk_socket = newsock;
806 newsk->sk_sleep = &newsock->wait;
808 /* Now attach up the new socket */
810 sk_acceptq_removed(sk);
819 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
820 int *uaddr_len, int peer)
822 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
823 struct sock *sk = sock->sk;
824 struct nr_sock *nr = nr_sk(sk);
828 if (sk->sk_state != TCP_ESTABLISHED) {
832 sax->fsa_ax25.sax25_family = AF_NETROM;
833 sax->fsa_ax25.sax25_ndigis = 1;
834 sax->fsa_ax25.sax25_call = nr->user_addr;
835 sax->fsa_digipeater[0] = nr->dest_addr;
836 *uaddr_len = sizeof(struct full_sockaddr_ax25);
838 sax->fsa_ax25.sax25_family = AF_NETROM;
839 sax->fsa_ax25.sax25_ndigis = 0;
840 sax->fsa_ax25.sax25_call = nr->source_addr;
841 *uaddr_len = sizeof(struct sockaddr_ax25);
848 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
852 struct nr_sock *nr_make;
853 ax25_address *src, *dest, *user;
854 unsigned short circuit_index, circuit_id;
855 unsigned short peer_circuit_index, peer_circuit_id;
856 unsigned short frametype, flags, window, timeout;
859 skb->sk = NULL; /* Initially we don't know who it's for */
862 * skb->data points to the netrom frame start
865 src = (ax25_address *)(skb->data + 0);
866 dest = (ax25_address *)(skb->data + 7);
868 circuit_index = skb->data[15];
869 circuit_id = skb->data[16];
870 peer_circuit_index = skb->data[17];
871 peer_circuit_id = skb->data[18];
872 frametype = skb->data[19] & 0x0F;
873 flags = skb->data[19] & 0xF0;
876 * Check for an incoming IP over NET/ROM frame.
878 if (frametype == NR_PROTOEXT &&
879 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
880 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
881 skb_reset_transport_header(skb);
883 return nr_rx_ip(skb, dev);
887 * Find an existing socket connection, based on circuit ID, if it's
888 * a Connect Request base it on their circuit ID.
890 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
891 * circuit that no longer exists at the other end ...
896 if (circuit_index == 0 && circuit_id == 0) {
897 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
898 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
900 if (frametype == NR_CONNREQ)
901 sk = nr_find_peer(circuit_index, circuit_id, src);
903 sk = nr_find_socket(circuit_index, circuit_id);
907 skb_reset_transport_header(skb);
909 if (frametype == NR_CONNACK && skb->len == 22)
910 nr_sk(sk)->bpqext = 1;
912 nr_sk(sk)->bpqext = 0;
914 ret = nr_process_rx_frame(sk, skb);
920 * Now it should be a CONNREQ.
922 if (frametype != NR_CONNREQ) {
924 * Here it would be nice to be able to send a reset but
925 * NET/ROM doesn't have one. We've tried to extend the protocol
926 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
927 * apparently kills BPQ boxes... :-(
928 * So now we try to follow the established behaviour of
929 * G8PZT's Xrouter which is sending packets with command type 7
930 * as an extension of the protocol.
932 if (sysctl_netrom_reset_circuit &&
933 (frametype != NR_RESET || flags != 0))
934 nr_transmit_reset(skb, 1);
939 sk = nr_find_listener(dest);
941 user = (ax25_address *)(skb->data + 21);
943 if (sk == NULL || sk_acceptq_is_full(sk) ||
944 (make = nr_make_new(sk)) == NULL) {
945 nr_transmit_refusal(skb, 0);
951 window = skb->data[20];
954 make->sk_state = TCP_ESTABLISHED;
956 /* Fill in his circuit details */
957 nr_make = nr_sk(make);
958 nr_make->source_addr = *dest;
959 nr_make->dest_addr = *src;
960 nr_make->user_addr = *user;
962 nr_make->your_index = circuit_index;
963 nr_make->your_id = circuit_id;
966 circuit = nr_find_next_circuit();
969 nr_make->my_index = circuit / 256;
970 nr_make->my_id = circuit % 256;
974 /* Window negotiation */
975 if (window < nr_make->window)
976 nr_make->window = window;
978 /* L4 timeout negotiation */
979 if (skb->len == 37) {
980 timeout = skb->data[36] * 256 + skb->data[35];
981 if (timeout * HZ < nr_make->t1)
982 nr_make->t1 = timeout * HZ;
988 nr_write_internal(make, NR_CONNACK);
990 nr_make->condition = 0x00;
995 nr_make->state = NR_STATE_3;
996 sk_acceptq_added(sk);
997 skb_queue_head(&sk->sk_receive_queue, skb);
999 if (!sock_flag(sk, SOCK_DEAD))
1000 sk->sk_data_ready(sk, skb->len);
1004 nr_insert_socket(make);
1006 nr_start_heartbeat(make);
1007 nr_start_idletimer(make);
1012 static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1013 struct msghdr *msg, size_t len)
1015 struct sock *sk = sock->sk;
1016 struct nr_sock *nr = nr_sk(sk);
1017 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1019 struct sockaddr_ax25 sax;
1020 struct sk_buff *skb;
1021 unsigned char *asmptr;
1024 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1028 if (sock_flag(sk, SOCK_ZAPPED)) {
1029 err = -EADDRNOTAVAIL;
1033 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1034 send_sig(SIGPIPE, current, 0);
1039 if (nr->device == NULL) {
1045 if (msg->msg_namelen < sizeof(sax)) {
1050 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1054 if (sax.sax25_family != AF_NETROM) {
1059 if (sk->sk_state != TCP_ESTABLISHED) {
1063 sax.sax25_family = AF_NETROM;
1064 sax.sax25_call = nr->dest_addr;
1067 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1069 /* Build a packet */
1070 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1071 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1073 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1076 skb_reserve(skb, size - len);
1077 skb_reset_transport_header(skb);
1080 * Push down the NET/ROM header
1083 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1084 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1086 /* Build a NET/ROM Transport header */
1088 *asmptr++ = nr->your_index;
1089 *asmptr++ = nr->your_id;
1090 *asmptr++ = 0; /* To be filled in later */
1091 *asmptr++ = 0; /* Ditto */
1092 *asmptr++ = NR_INFO;
1093 SOCK_DEBUG(sk, "Built header.\n");
1096 * Put the data on the end
1100 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1102 /* User data follows immediately after the NET/ROM transport header */
1103 if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) {
1109 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1111 if (sk->sk_state != TCP_ESTABLISHED) {
1117 nr_output(sk, skb); /* Shove it onto the queue */
1125 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1126 struct msghdr *msg, size_t size, int flags)
1128 struct sock *sk = sock->sk;
1129 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1131 struct sk_buff *skb;
1135 * This works for seqpacket too. The receiver has ordered the queue for
1136 * us! We do one quick check first though
1140 if (sk->sk_state != TCP_ESTABLISHED) {
1145 /* Now we can treat all alike */
1146 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1151 skb_reset_transport_header(skb);
1154 if (copied > size) {
1156 msg->msg_flags |= MSG_TRUNC;
1159 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1162 sax->sax25_family = AF_NETROM;
1163 skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
1167 msg->msg_namelen = sizeof(*sax);
1169 skb_free_datagram(sk, skb);
1176 static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1178 struct sock *sk = sock->sk;
1179 void __user *argp = (void __user *)arg;
1187 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1191 return put_user(amount, (int __user *)argp);
1195 struct sk_buff *skb;
1199 /* These two are safe on a single CPU system as only user tasks fiddle here */
1200 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1203 return put_user(amount, (int __user *)argp);
1208 ret = sock_get_timestamp(sk, argp);
1214 ret = sock_get_timestampns(sk, argp);
1220 case SIOCGIFDSTADDR:
1221 case SIOCSIFDSTADDR:
1222 case SIOCGIFBRDADDR:
1223 case SIOCSIFBRDADDR:
1224 case SIOCGIFNETMASK:
1225 case SIOCSIFNETMASK:
1233 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1234 return nr_rt_ioctl(cmd, argp);
1237 return -ENOIOCTLCMD;
1243 #ifdef CONFIG_PROC_FS
1245 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1248 struct hlist_node *node;
1251 spin_lock_bh(&nr_list_lock);
1253 return SEQ_START_TOKEN;
1255 sk_for_each(s, node, &nr_list) {
1263 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1267 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1268 : sk_next((struct sock *)v);
1271 static void nr_info_stop(struct seq_file *seq, void *v)
1273 spin_unlock_bh(&nr_list_lock);
1276 static int nr_info_show(struct seq_file *seq, void *v)
1279 struct net_device *dev;
1281 const char *devname;
1284 if (v == SEQ_START_TOKEN)
1286 "user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n");
1293 if ((dev = nr->device) == NULL)
1296 devname = dev->name;
1298 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1299 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1301 "%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n",
1302 ax2asc(buf, &nr->source_addr),
1312 ax25_display_timer(&nr->t1timer) / HZ,
1314 ax25_display_timer(&nr->t2timer) / HZ,
1316 ax25_display_timer(&nr->t4timer) / HZ,
1318 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1319 nr->idle / (60 * HZ),
1323 atomic_read(&s->sk_wmem_alloc),
1324 atomic_read(&s->sk_rmem_alloc),
1325 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1332 static const struct seq_operations nr_info_seqops = {
1333 .start = nr_info_start,
1334 .next = nr_info_next,
1335 .stop = nr_info_stop,
1336 .show = nr_info_show,
1339 static int nr_info_open(struct inode *inode, struct file *file)
1341 return seq_open(file, &nr_info_seqops);
1344 static const struct file_operations nr_info_fops = {
1345 .owner = THIS_MODULE,
1346 .open = nr_info_open,
1348 .llseek = seq_lseek,
1349 .release = seq_release,
1351 #endif /* CONFIG_PROC_FS */
1353 static struct net_proto_family nr_family_ops = {
1354 .family = PF_NETROM,
1355 .create = nr_create,
1356 .owner = THIS_MODULE,
1359 static const struct proto_ops nr_proto_ops = {
1360 .family = PF_NETROM,
1361 .owner = THIS_MODULE,
1362 .release = nr_release,
1364 .connect = nr_connect,
1365 .socketpair = sock_no_socketpair,
1366 .accept = nr_accept,
1367 .getname = nr_getname,
1368 .poll = datagram_poll,
1370 .listen = nr_listen,
1371 .shutdown = sock_no_shutdown,
1372 .setsockopt = nr_setsockopt,
1373 .getsockopt = nr_getsockopt,
1374 .sendmsg = nr_sendmsg,
1375 .recvmsg = nr_recvmsg,
1376 .mmap = sock_no_mmap,
1377 .sendpage = sock_no_sendpage,
1380 static struct notifier_block nr_dev_notifier = {
1381 .notifier_call = nr_device_event,
1384 static struct net_device **dev_nr;
1386 static struct ax25_protocol nr_pid = {
1387 .pid = AX25_P_NETROM,
1388 .func = nr_route_frame
1391 static struct ax25_linkfail nr_linkfail_notifier = {
1392 .func = nr_link_failed,
1395 static int __init nr_proto_init(void)
1398 int rc = proto_register(&nr_proto, 0);
1403 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1404 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1408 dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1409 if (dev_nr == NULL) {
1410 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1414 for (i = 0; i < nr_ndevs; i++) {
1415 char name[IFNAMSIZ];
1416 struct net_device *dev;
1418 sprintf(name, "nr%d", i);
1419 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1421 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1426 if (register_netdev(dev)) {
1427 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1431 lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key);
1435 if (sock_register(&nr_family_ops)) {
1436 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1440 register_netdevice_notifier(&nr_dev_notifier);
1442 ax25_register_pid(&nr_pid);
1443 ax25_linkfail_register(&nr_linkfail_notifier);
1445 #ifdef CONFIG_SYSCTL
1446 nr_register_sysctl();
1451 proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops);
1452 proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops);
1453 proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops);
1458 unregister_netdev(dev_nr[i]);
1459 free_netdev(dev_nr[i]);
1462 proto_unregister(&nr_proto);
1467 module_init(nr_proto_init);
1469 module_param(nr_ndevs, int, 0);
1470 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1472 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1473 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1474 MODULE_LICENSE("GPL");
1475 MODULE_ALIAS_NETPROTO(PF_NETROM);
1477 static void __exit nr_exit(void)
1481 proc_net_remove(&init_net, "nr");
1482 proc_net_remove(&init_net, "nr_neigh");
1483 proc_net_remove(&init_net, "nr_nodes");
1484 nr_loopback_clear();
1488 #ifdef CONFIG_SYSCTL
1489 nr_unregister_sysctl();
1492 ax25_linkfail_release(&nr_linkfail_notifier);
1493 ax25_protocol_release(AX25_P_NETROM);
1495 unregister_netdevice_notifier(&nr_dev_notifier);
1497 sock_unregister(PF_NETROM);
1499 for (i = 0; i < nr_ndevs; i++) {
1500 struct net_device *dev = dev_nr[i];
1502 unregister_netdev(dev);
1508 proto_unregister(&nr_proto);
1510 module_exit(nr_exit);