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/config.h>
12 #include <linux/module.h>
13 #include <linux/errno.h>
14 #include <linux/types.h>
15 #include <linux/socket.h>
17 #include <linux/kernel.h>
18 #include <linux/sched.h>
19 #include <linux/timer.h>
20 #include <linux/string.h>
21 #include <linux/sockios.h>
22 #include <linux/net.h>
23 #include <linux/stat.h>
25 #include <linux/inet.h>
26 #include <linux/netdevice.h>
27 #include <linux/if_arp.h>
28 #include <linux/skbuff.h>
30 #include <asm/uaccess.h>
31 #include <asm/system.h>
32 #include <linux/fcntl.h>
33 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
35 #include <linux/interrupt.h>
36 #include <linux/notifier.h>
37 #include <net/netrom.h>
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
43 #include <linux/init.h>
47 int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
48 int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
49 int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
50 int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
51 int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
52 int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
53 int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
54 int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
55 int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
56 int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
57 int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
59 static unsigned short circuit = 0x101;
61 static HLIST_HEAD(nr_list);
62 static spinlock_t nr_list_lock = SPIN_LOCK_UNLOCKED;
64 static struct proto_ops nr_proto_ops;
65 void nr_init_timers(struct sock *sk);
67 static struct sock *nr_alloc_sock(void)
70 struct sock *sk = sk_alloc(PF_NETROM, GFP_ATOMIC, 1, NULL);
75 nr = sk->sk_protinfo = kmalloc(sizeof(*nr), GFP_ATOMIC);
79 memset(nr, 0x00, sizeof(*nr));
90 * Socket removal during an interrupt is now safe.
92 static void nr_remove_socket(struct sock *sk)
94 spin_lock_bh(&nr_list_lock);
96 spin_unlock_bh(&nr_list_lock);
100 * Kill all bound sockets on a dropped device.
102 static void nr_kill_by_device(struct net_device *dev)
105 struct hlist_node *node;
107 spin_lock_bh(&nr_list_lock);
108 sk_for_each(s, node, &nr_list)
109 if (nr_sk(s)->device == dev)
110 nr_disconnect(s, ENETUNREACH);
111 spin_unlock_bh(&nr_list_lock);
115 * Handle device status changes.
117 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
119 struct net_device *dev = (struct net_device *)ptr;
121 if (event != NETDEV_DOWN)
124 nr_kill_by_device(dev);
125 nr_rt_device_down(dev);
131 * Add a socket to the bound sockets list.
133 static void nr_insert_socket(struct sock *sk)
135 spin_lock_bh(&nr_list_lock);
136 sk_add_node(sk, &nr_list);
137 spin_unlock_bh(&nr_list_lock);
141 * Find a socket that wants to accept the Connect Request we just
144 static struct sock *nr_find_listener(ax25_address *addr)
147 struct hlist_node *node;
149 spin_lock_bh(&nr_list_lock);
150 sk_for_each(s, node, &nr_list)
151 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
152 s->sk_state == TCP_LISTEN) {
158 spin_unlock_bh(&nr_list_lock);
163 * Find a connected NET/ROM socket given my circuit IDs.
165 static struct sock *nr_find_socket(unsigned char index, unsigned char id)
168 struct hlist_node *node;
170 spin_lock_bh(&nr_list_lock);
171 sk_for_each(s, node, &nr_list) {
172 nr_cb *nr = nr_sk(s);
174 if (nr->my_index == index && nr->my_id == id) {
181 spin_unlock_bh(&nr_list_lock);
186 * Find a connected NET/ROM socket given their circuit IDs.
188 static struct sock *nr_find_peer(unsigned char index, unsigned char id,
192 struct hlist_node *node;
194 spin_lock_bh(&nr_list_lock);
195 sk_for_each(s, node, &nr_list) {
196 nr_cb *nr = nr_sk(s);
198 if (nr->your_index == index && nr->your_id == id &&
199 !ax25cmp(&nr->dest_addr, dest)) {
206 spin_unlock_bh(&nr_list_lock);
211 * Find next free circuit ID.
213 static unsigned short nr_find_next_circuit(void)
215 unsigned short id = circuit;
223 if (i != 0 && j != 0) {
224 if ((sk=nr_find_socket(i, j)) == NULL)
238 void nr_destroy_socket(struct sock *);
241 * Handler for deferred kills.
243 static void nr_destroy_timer(unsigned long data)
245 struct sock *sk=(struct sock *)data;
248 nr_destroy_socket(sk);
254 * This is called from user mode and the timers. Thus it protects itself
255 * against interrupt users but doesn't worry about being called during
256 * work. Once it is removed from the queue no interrupt or bottom half
257 * will touch it and we are (fairly 8-) ) safe.
259 void nr_destroy_socket(struct sock *sk)
263 nr_remove_socket(sk);
265 nr_stop_heartbeat(sk);
269 nr_stop_idletimer(sk);
271 nr_clear_queues(sk); /* Flush the queues */
273 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
274 if (skb->sk != sk) { /* A pending connection */
275 /* Queue the unaccepted socket for death */
276 sock_set_flag(skb->sk, SOCK_DEAD);
277 nr_start_heartbeat(skb->sk);
278 nr_sk(skb->sk)->state = NR_STATE_0;
284 if (atomic_read(&sk->sk_wmem_alloc) ||
285 atomic_read(&sk->sk_rmem_alloc)) {
286 /* Defer: outstanding buffers */
287 sk->sk_timer.function = nr_destroy_timer;
288 sk->sk_timer.expires = jiffies + 2 * HZ;
289 add_timer(&sk->sk_timer);
295 * Handling for system calls applied via the various interfaces to a
296 * NET/ROM socket object.
299 static int nr_setsockopt(struct socket *sock, int level, int optname,
300 char *optval, int optlen)
302 struct sock *sk = sock->sk;
303 nr_cb *nr = nr_sk(sk);
306 if (level != SOL_NETROM)
309 if (optlen < sizeof(int))
312 if (get_user(opt, (int *)optval))
329 if (opt < 1 || opt > 31)
343 nr->idle = opt * 60 * HZ;
351 static int nr_getsockopt(struct socket *sock, int level, int optname,
352 char *optval, int *optlen)
354 struct sock *sk = sock->sk;
355 nr_cb *nr = nr_sk(sk);
359 if (level != SOL_NETROM)
362 if (get_user(len, optlen))
386 val = nr->idle / (60 * HZ);
393 len = min_t(unsigned int, len, sizeof(int));
395 if (put_user(len, optlen))
398 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
401 static int nr_listen(struct socket *sock, int backlog)
403 struct sock *sk = sock->sk;
406 if (sk->sk_state != TCP_LISTEN) {
407 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
408 sk->sk_max_ack_backlog = backlog;
409 sk->sk_state = TCP_LISTEN;
418 static int nr_create(struct socket *sock, int protocol)
423 if (sock->type != SOCK_SEQPACKET || protocol != 0)
424 return -ESOCKTNOSUPPORT;
426 if ((sk = nr_alloc_sock()) == NULL)
431 sock_init_data(sock, sk);
432 sk_set_owner(sk, THIS_MODULE);
434 sock->ops = &nr_proto_ops;
435 sk->sk_protocol = protocol;
437 skb_queue_head_init(&nr->ack_queue);
438 skb_queue_head_init(&nr->reseq_queue);
439 skb_queue_head_init(&nr->frag_queue);
443 nr->t1 = sysctl_netrom_transport_timeout;
444 nr->t2 = sysctl_netrom_transport_acknowledge_delay;
445 nr->n2 = sysctl_netrom_transport_maximum_tries;
446 nr->t4 = sysctl_netrom_transport_busy_delay;
447 nr->idle = sysctl_netrom_transport_no_activity_timeout;
448 nr->window = sysctl_netrom_transport_requested_window_size;
451 nr->state = NR_STATE_0;
456 static struct sock *nr_make_new(struct sock *osk)
461 if (osk->sk_type != SOCK_SEQPACKET)
464 if ((sk = nr_alloc_sock()) == NULL)
469 sock_init_data(NULL, sk);
470 sk_set_owner(sk, THIS_MODULE);
472 sk->sk_type = osk->sk_type;
473 sk->sk_socket = osk->sk_socket;
474 sk->sk_priority = osk->sk_priority;
475 sk->sk_protocol = osk->sk_protocol;
476 sk->sk_rcvbuf = osk->sk_rcvbuf;
477 sk->sk_sndbuf = osk->sk_sndbuf;
478 sk->sk_debug = osk->sk_debug;
479 sk->sk_state = TCP_ESTABLISHED;
480 sk->sk_sleep = osk->sk_sleep;
481 sk->sk_zapped = osk->sk_zapped;
483 skb_queue_head_init(&nr->ack_queue);
484 skb_queue_head_init(&nr->reseq_queue);
485 skb_queue_head_init(&nr->frag_queue);
495 nr->idle = onr->idle;
496 nr->window = onr->window;
498 nr->device = onr->device;
499 nr->bpqext = onr->bpqext;
504 static int nr_release(struct socket *sock)
506 struct sock *sk = sock->sk;
509 if (sk == NULL) return 0;
519 nr_disconnect(sk, 0);
520 nr_destroy_socket(sk);
526 nr_write_internal(sk, NR_DISCREQ);
527 nr_start_t1timer(sk);
530 nr_stop_idletimer(sk);
531 nr->state = NR_STATE_2;
532 sk->sk_state = TCP_CLOSE;
533 sk->sk_shutdown |= SEND_SHUTDOWN;
534 sk->sk_state_change(sk);
536 sock_set_flag(sk, SOCK_DESTROY);
537 sk->sk_socket = NULL;
541 sk->sk_socket = NULL;
552 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
554 struct sock *sk = sock->sk;
555 nr_cb *nr = nr_sk(sk);
556 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
557 struct net_device *dev;
558 ax25_address *user, *source;
561 if (!sk->sk_zapped) {
565 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
569 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
573 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
577 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
578 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
580 return -EADDRNOTAVAIL;
584 * Only the super user can set an arbitrary user callsign.
586 if (addr->fsa_ax25.sax25_ndigis == 1) {
587 if (!capable(CAP_NET_BIND_SERVICE)) {
592 nr->user_addr = addr->fsa_digipeater[0];
593 nr->source_addr = addr->fsa_ax25.sax25_call;
595 source = &addr->fsa_ax25.sax25_call;
597 if ((user = ax25_findbyuid(current->euid)) == NULL) {
598 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
606 nr->user_addr = *user;
607 nr->source_addr = *source;
611 nr_insert_socket(sk);
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 nr_cb *nr = nr_sk(sk);
625 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
626 ax25_address *user, *source = NULL;
627 struct net_device *dev;
630 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
631 sock->state = SS_CONNECTED;
633 return 0; /* Connect completed during a ERESTARTSYS event */
636 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
637 sock->state = SS_UNCONNECTED;
639 return -ECONNREFUSED;
642 if (sk->sk_state == TCP_ESTABLISHED) {
644 return -EISCONN; /* No reconnect on a seqpacket socket */
647 sk->sk_state = TCP_CLOSE;
648 sock->state = SS_UNCONNECTED;
650 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
654 if (addr->sax25_family != AF_NETROM) {
658 if (sk->sk_zapped) { /* Must bind first - autobinding in this may or may not work */
661 if ((dev = nr_dev_first()) == NULL) {
665 source = (ax25_address *)dev->dev_addr;
667 if ((user = ax25_findbyuid(current->euid)) == NULL) {
668 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
676 nr->user_addr = *user;
677 nr->source_addr = *source;
681 nr_insert_socket(sk); /* Finish the bind */
684 nr->dest_addr = addr->sax25_call;
687 circuit = nr_find_next_circuit();
690 nr->my_index = circuit / 256;
691 nr->my_id = circuit % 256;
695 /* Move to connecting socket, start sending Connect Requests */
696 sock->state = SS_CONNECTING;
697 sk->sk_state = TCP_SYN_SENT;
699 nr_establish_data_link(sk);
701 nr->state = NR_STATE_1;
703 nr_start_heartbeat(sk);
706 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
712 * A Connect Ack with Choke or timeout or failed routing will go to
715 if (sk->sk_state == TCP_SYN_SENT) {
716 struct task_struct *tsk = current;
717 DECLARE_WAITQUEUE(wait, tsk);
719 add_wait_queue(sk->sk_sleep, &wait);
721 set_current_state(TASK_INTERRUPTIBLE);
722 if (sk->sk_state != TCP_SYN_SENT)
725 if (!signal_pending(tsk)) {
730 current->state = TASK_RUNNING;
731 remove_wait_queue(sk->sk_sleep, &wait);
734 current->state = TASK_RUNNING;
735 remove_wait_queue(sk->sk_sleep, &wait);
738 if (sk->sk_state != TCP_ESTABLISHED) {
739 sock->state = SS_UNCONNECTED;
741 return sock_error(sk); /* Always set at this point */
744 sock->state = SS_CONNECTED;
750 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
752 struct task_struct *tsk = current;
753 DECLARE_WAITQUEUE(wait, tsk);
759 if ((sk = sock->sk) == NULL)
763 if (sk->sk_type != SOCK_SEQPACKET) {
768 if (sk->sk_state != TCP_LISTEN) {
774 * The write queue this time is holding sockets ready to use
775 * hooked into the SABM we saved
777 add_wait_queue(sk->sk_sleep, &wait);
779 skb = skb_dequeue(&sk->sk_receive_queue);
783 current->state = TASK_INTERRUPTIBLE;
785 if (flags & O_NONBLOCK) {
786 current->state = TASK_RUNNING;
787 remove_wait_queue(sk->sk_sleep, &wait);
790 if (!signal_pending(tsk)) {
795 current->state = TASK_RUNNING;
796 remove_wait_queue(sk->sk_sleep, &wait);
799 current->state = TASK_RUNNING;
800 remove_wait_queue(sk->sk_sleep, &wait);
803 newsk->sk_pair = NULL;
804 newsk->sk_socket = newsock;
805 newsk->sk_sleep = &newsock->wait;
807 /* Now attach up the new socket */
809 sk->sk_ack_backlog--;
817 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
818 int *uaddr_len, int peer)
820 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
821 struct sock *sk = sock->sk;
822 nr_cb *nr = nr_sk(sk);
826 if (sk->sk_state != TCP_ESTABLISHED) {
830 sax->fsa_ax25.sax25_family = AF_NETROM;
831 sax->fsa_ax25.sax25_ndigis = 1;
832 sax->fsa_ax25.sax25_call = nr->user_addr;
833 sax->fsa_digipeater[0] = nr->dest_addr;
834 *uaddr_len = sizeof(struct full_sockaddr_ax25);
836 sax->fsa_ax25.sax25_family = AF_NETROM;
837 sax->fsa_ax25.sax25_ndigis = 0;
838 sax->fsa_ax25.sax25_call = nr->source_addr;
839 *uaddr_len = sizeof(struct sockaddr_ax25);
846 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
851 ax25_address *src, *dest, *user;
852 unsigned short circuit_index, circuit_id;
853 unsigned short peer_circuit_index, peer_circuit_id;
854 unsigned short frametype, flags, window, timeout;
857 skb->sk = NULL; /* Initially we don't know who it's for */
860 * skb->data points to the netrom frame start
863 src = (ax25_address *)(skb->data + 0);
864 dest = (ax25_address *)(skb->data + 7);
866 circuit_index = skb->data[15];
867 circuit_id = skb->data[16];
868 peer_circuit_index = skb->data[17];
869 peer_circuit_id = skb->data[18];
870 frametype = skb->data[19] & 0x0F;
871 flags = skb->data[19] & 0xF0;
875 * Check for an incoming IP over NET/ROM frame.
877 if (frametype == NR_PROTOEXT && circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
878 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
879 skb->h.raw = skb->data;
881 return nr_rx_ip(skb, dev);
886 * Find an existing socket connection, based on circuit ID, if it's
887 * a Connect Request base it on their circuit ID.
889 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
890 * circuit that no longer exists at the other end ...
895 if (circuit_index == 0 && circuit_id == 0) {
896 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
897 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
899 if (frametype == NR_CONNREQ)
900 sk = nr_find_peer(circuit_index, circuit_id, src);
902 sk = nr_find_socket(circuit_index, circuit_id);
906 skb->h.raw = skb->data;
908 if (frametype == NR_CONNACK && skb->len == 22)
909 nr_sk(sk)->bpqext = 1;
911 nr_sk(sk)->bpqext = 0;
913 ret = nr_process_rx_frame(sk, skb);
919 * Now it should be a CONNREQ.
921 if (frametype != NR_CONNREQ) {
923 * Here it would be nice to be able to send a reset but
924 * NET/ROM doesn't have one. The following hack would
925 * have been a way to extend the protocol but apparently
926 * it kills BPQ boxes... :-(
930 * Never reply to a CONNACK/CHOKE.
932 if (frametype != NR_CONNACK || flags != NR_CHOKE_FLAG)
933 nr_transmit_refusal(skb, 1);
938 sk = nr_find_listener(dest);
940 user = (ax25_address *)(skb->data + 21);
942 if (!sk || sk->sk_ack_backlog == sk->sk_max_ack_backlog ||
943 (make = nr_make_new(sk)) == NULL) {
944 nr_transmit_refusal(skb, 0);
950 window = skb->data[20];
953 make->sk_state = TCP_ESTABLISHED;
955 /* Fill in his circuit details */
956 nr_make = nr_sk(make);
957 nr_make->source_addr = *dest;
958 nr_make->dest_addr = *src;
959 nr_make->user_addr = *user;
961 nr_make->your_index = circuit_index;
962 nr_make->your_id = circuit_id;
965 circuit = nr_find_next_circuit();
968 nr_make->my_index = circuit / 256;
969 nr_make->my_id = circuit % 256;
973 /* Window negotiation */
974 if (window < nr_make->window)
975 nr_make->window = window;
977 /* L4 timeout negotiation */
978 if (skb->len == 37) {
979 timeout = skb->data[36] * 256 + skb->data[35];
980 if (timeout * HZ < nr_make->t1)
981 nr_make->t1 = timeout * HZ;
987 nr_write_internal(make, NR_CONNACK);
989 nr_make->condition = 0x00;
994 nr_make->state = NR_STATE_3;
995 sk->sk_ack_backlog++;
998 nr_insert_socket(make);
1000 skb_queue_head(&sk->sk_receive_queue, skb);
1002 nr_start_heartbeat(make);
1003 nr_start_idletimer(make);
1005 if (!sock_flag(sk, SOCK_DEAD))
1006 sk->sk_data_ready(sk, skb->len);
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 nr_cb *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))
1028 if (sk->sk_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);
1079 * Push down the NET/ROM header
1082 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1083 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1085 /* Build a NET/ROM Transport header */
1087 *asmptr++ = nr->your_index;
1088 *asmptr++ = nr->your_id;
1089 *asmptr++ = 0; /* To be filled in later */
1090 *asmptr++ = 0; /* Ditto */
1091 *asmptr++ = NR_INFO;
1092 SOCK_DEBUG(sk, "Built header.\n");
1095 * Put the data on the end
1098 skb->h.raw = skb_put(skb, len);
1100 asmptr = skb->h.raw;
1101 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1103 /* User data follows immediately after the NET/ROM transport header */
1104 if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
1110 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1112 if (sk->sk_state != TCP_ESTABLISHED) {
1118 nr_output(sk, skb); /* Shove it onto the queue */
1126 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1127 struct msghdr *msg, size_t size, int flags)
1129 struct sock *sk = sock->sk;
1130 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1132 struct sk_buff *skb;
1136 * This works for seqpacket too. The receiver has ordered the queue for
1137 * us! We do one quick check first though
1141 if (sk->sk_state != TCP_ESTABLISHED) {
1146 /* Now we can treat all alike */
1147 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1152 skb->h.raw = skb->data;
1155 if (copied > size) {
1157 msg->msg_flags |= MSG_TRUNC;
1160 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1163 sax->sax25_family = AF_NETROM;
1164 memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN);
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;
1185 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1189 return put_user(amount, (int *)arg);
1193 struct sk_buff *skb;
1195 /* These two are safe on a single CPU system as only user tasks fiddle here */
1196 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1199 return put_user(amount, (int *)arg);
1205 ret = sock_get_timestamp(sk, (struct timeval *)arg);
1211 case SIOCGIFDSTADDR:
1212 case SIOCSIFDSTADDR:
1213 case SIOCGIFBRDADDR:
1214 case SIOCSIFBRDADDR:
1215 case SIOCGIFNETMASK:
1216 case SIOCSIFNETMASK:
1226 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1227 return nr_rt_ioctl(cmd, (void *)arg);
1231 return dev_ioctl(cmd, (void *)arg);
1238 #ifdef CONFIG_PROC_FS
1240 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1243 struct hlist_node *node;
1246 spin_lock_bh(&nr_list_lock);
1248 return SEQ_START_TOKEN;
1250 sk_for_each(s, node, &nr_list) {
1258 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1262 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1263 : sk_next((struct sock *)v);
1266 static void nr_info_stop(struct seq_file *seq, void *v)
1268 spin_unlock_bh(&nr_list_lock);
1271 static int nr_info_show(struct seq_file *seq, void *v)
1274 struct net_device *dev;
1276 const char *devname;
1278 if (v == SEQ_START_TOKEN)
1280 "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");
1287 if ((dev = nr->device) == NULL)
1290 devname = dev->name;
1292 seq_printf(seq, "%-9s ", ax2asc(&nr->user_addr));
1293 seq_printf(seq, "%-9s ", ax2asc(&nr->dest_addr));
1295 "%-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",
1296 ax2asc(&nr->source_addr),
1306 ax25_display_timer(&nr->t1timer) / HZ,
1308 ax25_display_timer(&nr->t2timer) / HZ,
1310 ax25_display_timer(&nr->t4timer) / HZ,
1312 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1313 nr->idle / (60 * HZ),
1317 atomic_read(&s->sk_wmem_alloc),
1318 atomic_read(&s->sk_rmem_alloc),
1319 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1326 static struct seq_operations nr_info_seqops = {
1327 .start = nr_info_start,
1328 .next = nr_info_next,
1329 .stop = nr_info_stop,
1330 .show = nr_info_show,
1333 static int nr_info_open(struct inode *inode, struct file *file)
1335 return seq_open(file, &nr_info_seqops);
1338 static struct file_operations nr_info_fops = {
1339 .owner = THIS_MODULE,
1340 .open = nr_info_open,
1342 .llseek = seq_lseek,
1343 .release = seq_release,
1345 #endif /* CONFIG_PROC_FS */
1347 static struct net_proto_family nr_family_ops = {
1348 .family = PF_NETROM,
1349 .create = nr_create,
1350 .owner = THIS_MODULE,
1353 static struct proto_ops nr_proto_ops = {
1354 .family = PF_NETROM,
1355 .owner = THIS_MODULE,
1356 .release = nr_release,
1358 .connect = nr_connect,
1359 .socketpair = sock_no_socketpair,
1360 .accept = nr_accept,
1361 .getname = nr_getname,
1362 .poll = datagram_poll,
1364 .listen = nr_listen,
1365 .shutdown = sock_no_shutdown,
1366 .setsockopt = nr_setsockopt,
1367 .getsockopt = nr_getsockopt,
1368 .sendmsg = nr_sendmsg,
1369 .recvmsg = nr_recvmsg,
1370 .mmap = sock_no_mmap,
1371 .sendpage = sock_no_sendpage,
1374 static struct notifier_block nr_dev_notifier = {
1375 .notifier_call = nr_device_event,
1378 static struct net_device **dev_nr;
1380 static char banner[] __initdata = KERN_INFO "G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n";
1382 static int __init nr_proto_init(void)
1386 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1387 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1391 dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1392 if (dev_nr == NULL) {
1393 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1397 memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *));
1399 for (i = 0; i < nr_ndevs; i++) {
1400 char name[IFNAMSIZ];
1401 struct net_device *dev;
1403 sprintf(name, "nr%d", i);
1404 dev = alloc_netdev(sizeof(struct net_device_stats), name,
1407 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1412 if (register_netdev(dev)) {
1413 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1420 if (sock_register(&nr_family_ops)) {
1421 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1425 register_netdevice_notifier(&nr_dev_notifier);
1428 ax25_protocol_register(AX25_P_NETROM, nr_route_frame);
1429 ax25_linkfail_register(nr_link_failed);
1431 #ifdef CONFIG_SYSCTL
1432 nr_register_sysctl();
1437 proc_net_fops_create("nr", S_IRUGO, &nr_info_fops);
1438 proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops);
1439 proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops);
1444 unregister_netdev(dev_nr[i]);
1445 free_netdev(dev_nr[i]);
1451 module_init(nr_proto_init);
1454 MODULE_PARM(nr_ndevs, "i");
1455 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1457 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1458 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1459 MODULE_LICENSE("GPL");
1460 MODULE_ALIAS_NETPROTO(PF_NETROM);
1462 static void __exit nr_exit(void)
1466 proc_net_remove("nr");
1467 proc_net_remove("nr_neigh");
1468 proc_net_remove("nr_nodes");
1469 nr_loopback_clear();
1473 #ifdef CONFIG_SYSCTL
1474 nr_unregister_sysctl();
1477 ax25_linkfail_release(nr_link_failed);
1478 ax25_protocol_release(AX25_P_NETROM);
1480 unregister_netdevice_notifier(&nr_dev_notifier);
1482 sock_unregister(PF_NETROM);
1484 for (i = 0; i < nr_ndevs; i++) {
1485 struct net_device *dev = dev_nr[i];
1487 unregister_netdev(dev);
1494 module_exit(nr_exit);