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-rw-r--r--net/decnet/af_decnet.c2404
1 files changed, 0 insertions, 2404 deletions
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
deleted file mode 100644
index 6582dfdfb932..000000000000
--- a/net/decnet/af_decnet.c
+++ /dev/null
@@ -1,2404 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Socket Layer Interface
- *
- * Authors: Eduardo Marcelo Serrat <emserrat@geocities.com>
- * Patrick Caulfield <patrick@pandh.demon.co.uk>
- *
- * Changes:
- * Steve Whitehouse: Copied from Eduardo Serrat and Patrick Caulfield's
- * version of the code. Original copyright preserved
- * below.
- * Steve Whitehouse: Some bug fixes, cleaning up some code to make it
- * compatible with my routing layer.
- * Steve Whitehouse: Merging changes from Eduardo Serrat and Patrick
- * Caulfield.
- * Steve Whitehouse: Further bug fixes, checking module code still works
- * with new routing layer.
- * Steve Whitehouse: Additional set/get_sockopt() calls.
- * Steve Whitehouse: Fixed TIOCINQ ioctl to be same as Eduardo's new
- * code.
- * Steve Whitehouse: recvmsg() changed to try and behave in a POSIX like
- * way. Didn't manage it entirely, but its better.
- * Steve Whitehouse: ditto for sendmsg().
- * Steve Whitehouse: A selection of bug fixes to various things.
- * Steve Whitehouse: Added TIOCOUTQ ioctl.
- * Steve Whitehouse: Fixes to username2sockaddr & sockaddr2username.
- * Steve Whitehouse: Fixes to connect() error returns.
- * Patrick Caulfield: Fixes to delayed acceptance logic.
- * David S. Miller: New socket locking
- * Steve Whitehouse: Socket list hashing/locking
- * Arnaldo C. Melo: use capable, not suser
- * Steve Whitehouse: Removed unused code. Fix to use sk->allocation
- * when required.
- * Patrick Caulfield: /proc/net/decnet now has object name/number
- * Steve Whitehouse: Fixed local port allocation, hashed sk list
- * Matthew Wilcox: Fixes for dn_ioctl()
- * Steve Whitehouse: New connect/accept logic to allow timeouts and
- * prepare for sendpage etc.
- */
-
-
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-
-HISTORY:
-
-Version Kernel Date Author/Comments
-------- ------ ---- ---------------
-Version 0.0.1 2.0.30 01-dic-97 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
-
- First Development of DECnet Socket La-
- yer for Linux. Only supports outgoing
- connections.
-
-Version 0.0.2 2.1.105 20-jun-98 Patrick J. Caulfield
- (patrick@pandh.demon.co.uk)
-
- Port to new kernel development version.
-
-Version 0.0.3 2.1.106 25-jun-98 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
- _
- Added support for incoming connections
- so we can start developing server apps
- on Linux.
- -
- Module Support
-Version 0.0.4 2.1.109 21-jul-98 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
- _
- Added support for X11R6.4. Now we can
- use DECnet transport for X on Linux!!!
- -
-Version 0.0.5 2.1.110 01-aug-98 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
- Removed bugs on flow control
- Removed bugs on incoming accessdata
- order
- -
-Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat
- dn_recvmsg fixes
-
- Patrick J. Caulfield
- dn_bind fixes
-*******************************************************************************/
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/netfilter.h>
-#include <linux/seq_file.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <net/flow.h>
-#include <asm/ioctls.h>
-#include <linux/capability.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/jiffies.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/fib_rules.h>
-#include <net/tcp.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-
-struct dn_sock {
- struct sock sk;
- struct dn_scp scp;
-};
-
-static void dn_keepalive(struct sock *sk);
-
-#define DN_SK_HASH_SHIFT 8
-#define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT)
-#define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1)
-
-
-static const struct proto_ops dn_proto_ops;
-static DEFINE_RWLOCK(dn_hash_lock);
-static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
-static struct hlist_head dn_wild_sk;
-static atomic_long_t decnet_memory_allocated;
-static DEFINE_PER_CPU(int, decnet_memory_per_cpu_fw_alloc);
-
-static int __dn_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen, int flags);
-static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
-
-static struct hlist_head *dn_find_list(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->addr.sdn_flags & SDF_WILD)
- return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL;
-
- return &dn_sk_hash[le16_to_cpu(scp->addrloc) & DN_SK_HASH_MASK];
-}
-
-/*
- * Valid ports are those greater than zero and not already in use.
- */
-static int check_port(__le16 port)
-{
- struct sock *sk;
-
- if (port == 0)
- return -1;
-
- sk_for_each(sk, &dn_sk_hash[le16_to_cpu(port) & DN_SK_HASH_MASK]) {
- struct dn_scp *scp = DN_SK(sk);
- if (scp->addrloc == port)
- return -1;
- }
- return 0;
-}
-
-static unsigned short port_alloc(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- static unsigned short port = 0x2000;
- unsigned short i_port = port;
-
- while(check_port(cpu_to_le16(++port)) != 0) {
- if (port == i_port)
- return 0;
- }
-
- scp->addrloc = cpu_to_le16(port);
-
- return 1;
-}
-
-/*
- * Since this is only ever called from user
- * level, we don't need a write_lock() version
- * of this.
- */
-static int dn_hash_sock(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct hlist_head *list;
- int rv = -EUSERS;
-
- BUG_ON(sk_hashed(sk));
-
- write_lock_bh(&dn_hash_lock);
-
- if (!scp->addrloc && !port_alloc(sk))
- goto out;
-
- rv = -EADDRINUSE;
- if ((list = dn_find_list(sk)) == NULL)
- goto out;
-
- sk_add_node(sk, list);
- rv = 0;
-out:
- write_unlock_bh(&dn_hash_lock);
- return rv;
-}
-
-static void dn_unhash_sock(struct sock *sk)
-{
- write_lock(&dn_hash_lock);
- sk_del_node_init(sk);
- write_unlock(&dn_hash_lock);
-}
-
-static void dn_unhash_sock_bh(struct sock *sk)
-{
- write_lock_bh(&dn_hash_lock);
- sk_del_node_init(sk);
- write_unlock_bh(&dn_hash_lock);
-}
-
-static struct hlist_head *listen_hash(struct sockaddr_dn *addr)
-{
- int i;
- unsigned int hash = addr->sdn_objnum;
-
- if (hash == 0) {
- hash = addr->sdn_objnamel;
- for(i = 0; i < le16_to_cpu(addr->sdn_objnamel); i++) {
- hash ^= addr->sdn_objname[i];
- hash ^= (hash << 3);
- }
- }
-
- return &dn_sk_hash[hash & DN_SK_HASH_MASK];
-}
-
-/*
- * Called to transform a socket from bound (i.e. with a local address)
- * into a listening socket (doesn't need a local port number) and rehashes
- * based upon the object name/number.
- */
-static void dn_rehash_sock(struct sock *sk)
-{
- struct hlist_head *list;
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->addr.sdn_flags & SDF_WILD)
- return;
-
- write_lock_bh(&dn_hash_lock);
- sk_del_node_init(sk);
- DN_SK(sk)->addrloc = 0;
- list = listen_hash(&DN_SK(sk)->addr);
- sk_add_node(sk, list);
- write_unlock_bh(&dn_hash_lock);
-}
-
-int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type)
-{
- int len = 2;
-
- *buf++ = type;
-
- switch (type) {
- case 0:
- *buf++ = sdn->sdn_objnum;
- break;
- case 1:
- *buf++ = 0;
- *buf++ = le16_to_cpu(sdn->sdn_objnamel);
- memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel));
- len = 3 + le16_to_cpu(sdn->sdn_objnamel);
- break;
- case 2:
- memset(buf, 0, 5);
- buf += 5;
- *buf++ = le16_to_cpu(sdn->sdn_objnamel);
- memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel));
- len = 7 + le16_to_cpu(sdn->sdn_objnamel);
- break;
- }
-
- return len;
-}
-
-/*
- * On reception of usernames, we handle types 1 and 0 for destination
- * addresses only. Types 2 and 4 are used for source addresses, but the
- * UIC, GIC are ignored and they are both treated the same way. Type 3
- * is never used as I've no idea what its purpose might be or what its
- * format is.
- */
-int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt)
-{
- unsigned char type;
- int size = len;
- int namel = 12;
-
- sdn->sdn_objnum = 0;
- sdn->sdn_objnamel = cpu_to_le16(0);
- memset(sdn->sdn_objname, 0, DN_MAXOBJL);
-
- if (len < 2)
- return -1;
-
- len -= 2;
- *fmt = *data++;
- type = *data++;
-
- switch (*fmt) {
- case 0:
- sdn->sdn_objnum = type;
- return 2;
- case 1:
- namel = 16;
- break;
- case 2:
- len -= 4;
- data += 4;
- break;
- case 4:
- len -= 8;
- data += 8;
- break;
- default:
- return -1;
- }
-
- len -= 1;
-
- if (len < 0)
- return -1;
-
- sdn->sdn_objnamel = cpu_to_le16(*data++);
- len -= le16_to_cpu(sdn->sdn_objnamel);
-
- if ((len < 0) || (le16_to_cpu(sdn->sdn_objnamel) > namel))
- return -1;
-
- memcpy(sdn->sdn_objname, data, le16_to_cpu(sdn->sdn_objnamel));
-
- return size - len;
-}
-
-struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr)
-{
- struct hlist_head *list = listen_hash(addr);
- struct sock *sk;
-
- read_lock(&dn_hash_lock);
- sk_for_each(sk, list) {
- struct dn_scp *scp = DN_SK(sk);
- if (sk->sk_state != TCP_LISTEN)
- continue;
- if (scp->addr.sdn_objnum) {
- if (scp->addr.sdn_objnum != addr->sdn_objnum)
- continue;
- } else {
- if (addr->sdn_objnum)
- continue;
- if (scp->addr.sdn_objnamel != addr->sdn_objnamel)
- continue;
- if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, le16_to_cpu(addr->sdn_objnamel)) != 0)
- continue;
- }
- sock_hold(sk);
- read_unlock(&dn_hash_lock);
- return sk;
- }
-
- sk = sk_head(&dn_wild_sk);
- if (sk) {
- if (sk->sk_state == TCP_LISTEN)
- sock_hold(sk);
- else
- sk = NULL;
- }
-
- read_unlock(&dn_hash_lock);
- return sk;
-}
-
-struct sock *dn_find_by_skb(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct sock *sk;
- struct dn_scp *scp;
-
- read_lock(&dn_hash_lock);
- sk_for_each(sk, &dn_sk_hash[le16_to_cpu(cb->dst_port) & DN_SK_HASH_MASK]) {
- scp = DN_SK(sk);
- if (cb->src != dn_saddr2dn(&scp->peer))
- continue;
- if (cb->dst_port != scp->addrloc)
- continue;
- if (scp->addrrem && (cb->src_port != scp->addrrem))
- continue;
- sock_hold(sk);
- goto found;
- }
- sk = NULL;
-found:
- read_unlock(&dn_hash_lock);
- return sk;
-}
-
-
-
-static void dn_destruct(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- skb_queue_purge(&scp->data_xmit_queue);
- skb_queue_purge(&scp->other_xmit_queue);
- skb_queue_purge(&scp->other_receive_queue);
-
- dst_release(rcu_dereference_protected(sk->sk_dst_cache, 1));
-}
-
-static unsigned long dn_memory_pressure;
-
-static void dn_enter_memory_pressure(struct sock *sk)
-{
- if (!dn_memory_pressure) {
- dn_memory_pressure = 1;
- }
-}
-
-static struct proto dn_proto = {
- .name = "NSP",
- .owner = THIS_MODULE,
- .enter_memory_pressure = dn_enter_memory_pressure,
- .memory_pressure = &dn_memory_pressure,
-
- .memory_allocated = &decnet_memory_allocated,
- .per_cpu_fw_alloc = &decnet_memory_per_cpu_fw_alloc,
-
- .sysctl_mem = sysctl_decnet_mem,
- .sysctl_wmem = sysctl_decnet_wmem,
- .sysctl_rmem = sysctl_decnet_rmem,
- .max_header = DN_MAX_NSP_DATA_HEADER + 64,
- .obj_size = sizeof(struct dn_sock),
-};
-
-static struct sock *dn_alloc_sock(struct net *net, struct socket *sock, gfp_t gfp, int kern)
-{
- struct dn_scp *scp;
- struct sock *sk = sk_alloc(net, PF_DECnet, gfp, &dn_proto, kern);
-
- if (!sk)
- goto out;
-
- if (sock)
- sock->ops = &dn_proto_ops;
- sock_init_data(sock, sk);
-
- sk->sk_backlog_rcv = dn_nsp_backlog_rcv;
- sk->sk_destruct = dn_destruct;
- sk->sk_no_check_tx = 1;
- sk->sk_family = PF_DECnet;
- sk->sk_protocol = 0;
- sk->sk_allocation = gfp;
- sk->sk_sndbuf = READ_ONCE(sysctl_decnet_wmem[1]);
- sk->sk_rcvbuf = READ_ONCE(sysctl_decnet_rmem[1]);
-
- /* Initialization of DECnet Session Control Port */
- scp = DN_SK(sk);
- scp->state = DN_O; /* Open */
- scp->numdat = 1; /* Next data seg to tx */
- scp->numoth = 1; /* Next oth data to tx */
- scp->ackxmt_dat = 0; /* Last data seg ack'ed */
- scp->ackxmt_oth = 0; /* Last oth data ack'ed */
- scp->ackrcv_dat = 0; /* Highest data ack recv*/
- scp->ackrcv_oth = 0; /* Last oth data ack rec*/
- scp->flowrem_sw = DN_SEND;
- scp->flowloc_sw = DN_SEND;
- scp->flowrem_dat = 0;
- scp->flowrem_oth = 1;
- scp->flowloc_dat = 0;
- scp->flowloc_oth = 1;
- scp->services_rem = 0;
- scp->services_loc = 1 | NSP_FC_NONE;
- scp->info_rem = 0;
- scp->info_loc = 0x03; /* NSP version 4.1 */
- scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */
- scp->nonagle = 0;
- scp->multi_ireq = 1;
- scp->accept_mode = ACC_IMMED;
- scp->addr.sdn_family = AF_DECnet;
- scp->peer.sdn_family = AF_DECnet;
- scp->accessdata.acc_accl = 5;
- memcpy(scp->accessdata.acc_acc, "LINUX", 5);
-
- scp->max_window = NSP_MAX_WINDOW;
- scp->snd_window = NSP_MIN_WINDOW;
- scp->nsp_srtt = NSP_INITIAL_SRTT;
- scp->nsp_rttvar = NSP_INITIAL_RTTVAR;
- scp->nsp_rxtshift = 0;
-
- skb_queue_head_init(&scp->data_xmit_queue);
- skb_queue_head_init(&scp->other_xmit_queue);
- skb_queue_head_init(&scp->other_receive_queue);
-
- scp->persist = 0;
- scp->persist_fxn = NULL;
- scp->keepalive = 10 * HZ;
- scp->keepalive_fxn = dn_keepalive;
-
- dn_start_slow_timer(sk);
-out:
- return sk;
-}
-
-/*
- * Keepalive timer.
- * FIXME: Should respond to SO_KEEPALIVE etc.
- */
-static void dn_keepalive(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- /*
- * By checking the other_data transmit queue is empty
- * we are double checking that we are not sending too
- * many of these keepalive frames.
- */
- if (skb_queue_empty(&scp->other_xmit_queue))
- dn_nsp_send_link(sk, DN_NOCHANGE, 0);
-}
-
-
-/*
- * Timer for shutdown/destroyed sockets.
- * When socket is dead & no packets have been sent for a
- * certain amount of time, they are removed by this
- * routine. Also takes care of sending out DI & DC
- * frames at correct times.
- */
-int dn_destroy_timer(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- scp->persist = dn_nsp_persist(sk);
-
- switch (scp->state) {
- case DN_DI:
- dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
- if (scp->nsp_rxtshift >= decnet_di_count)
- scp->state = DN_CN;
- return 0;
-
- case DN_DR:
- dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
- if (scp->nsp_rxtshift >= decnet_dr_count)
- scp->state = DN_DRC;
- return 0;
-
- case DN_DN:
- if (scp->nsp_rxtshift < decnet_dn_count) {
- /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */
- dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
- GFP_ATOMIC);
- return 0;
- }
- }
-
- scp->persist = (HZ * decnet_time_wait);
-
- if (sk->sk_socket)
- return 0;
-
- if (time_after_eq(jiffies, scp->stamp + HZ * decnet_time_wait)) {
- dn_unhash_sock(sk);
- sock_put(sk);
- return 1;
- }
-
- return 0;
-}
-
-static void dn_destroy_sock(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- scp->nsp_rxtshift = 0; /* reset back off */
-
- if (sk->sk_socket) {
- if (sk->sk_socket->state != SS_UNCONNECTED)
- sk->sk_socket->state = SS_DISCONNECTING;
- }
-
- sk->sk_state = TCP_CLOSE;
-
- switch (scp->state) {
- case DN_DN:
- dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
- sk->sk_allocation);
- scp->persist_fxn = dn_destroy_timer;
- scp->persist = dn_nsp_persist(sk);
- break;
- case DN_CR:
- scp->state = DN_DR;
- goto disc_reject;
- case DN_RUN:
- scp->state = DN_DI;
- fallthrough;
- case DN_DI:
- case DN_DR:
-disc_reject:
- dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation);
- fallthrough;
- case DN_NC:
- case DN_NR:
- case DN_RJ:
- case DN_DIC:
- case DN_CN:
- case DN_DRC:
- case DN_CI:
- case DN_CD:
- scp->persist_fxn = dn_destroy_timer;
- scp->persist = dn_nsp_persist(sk);
- break;
- default:
- printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n");
- fallthrough;
- case DN_O:
- dn_stop_slow_timer(sk);
-
- dn_unhash_sock_bh(sk);
- sock_put(sk);
-
- break;
- }
-}
-
-char *dn_addr2asc(__u16 addr, char *buf)
-{
- unsigned short node, area;
-
- node = addr & 0x03ff;
- area = addr >> 10;
- sprintf(buf, "%hd.%hd", area, node);
-
- return buf;
-}
-
-
-
-static int dn_create(struct net *net, struct socket *sock, int protocol,
- int kern)
-{
- struct sock *sk;
-
- if (protocol < 0 || protocol > U8_MAX)
- return -EINVAL;
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
- switch (sock->type) {
- case SOCK_SEQPACKET:
- if (protocol != DNPROTO_NSP)
- return -EPROTONOSUPPORT;
- break;
- case SOCK_STREAM:
- break;
- default:
- return -ESOCKTNOSUPPORT;
- }
-
-
- if ((sk = dn_alloc_sock(net, sock, GFP_KERNEL, kern)) == NULL)
- return -ENOBUFS;
-
- sk->sk_protocol = protocol;
-
- return 0;
-}
-
-
-static int
-dn_release(struct socket *sock)
-{
- struct sock *sk = sock->sk;
-
- if (sk) {
- sock_orphan(sk);
- sock_hold(sk);
- lock_sock(sk);
- dn_destroy_sock(sk);
- release_sock(sk);
- sock_put(sk);
- }
-
- return 0;
-}
-
-static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr;
- struct net_device *dev, *ldev;
- int rv;
-
- if (addr_len != sizeof(struct sockaddr_dn))
- return -EINVAL;
-
- if (saddr->sdn_family != AF_DECnet)
- return -EINVAL;
-
- if (le16_to_cpu(saddr->sdn_nodeaddrl) && (le16_to_cpu(saddr->sdn_nodeaddrl) != 2))
- return -EINVAL;
-
- if (le16_to_cpu(saddr->sdn_objnamel) > DN_MAXOBJL)
- return -EINVAL;
-
- if (saddr->sdn_flags & ~SDF_WILD)
- return -EINVAL;
-
- if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum ||
- (saddr->sdn_flags & SDF_WILD)))
- return -EACCES;
-
- if (!(saddr->sdn_flags & SDF_WILD)) {
- if (le16_to_cpu(saddr->sdn_nodeaddrl)) {
- rcu_read_lock();
- ldev = NULL;
- for_each_netdev_rcu(&init_net, dev) {
- if (!dev->dn_ptr)
- continue;
- if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) {
- ldev = dev;
- break;
- }
- }
- rcu_read_unlock();
- if (ldev == NULL)
- return -EADDRNOTAVAIL;
- }
- }
-
- rv = -EINVAL;
- lock_sock(sk);
- if (sock_flag(sk, SOCK_ZAPPED)) {
- memcpy(&scp->addr, saddr, addr_len);
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- rv = dn_hash_sock(sk);
- if (rv)
- sock_set_flag(sk, SOCK_ZAPPED);
- }
- release_sock(sk);
-
- return rv;
-}
-
-
-static int dn_auto_bind(struct socket *sock)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- int rv;
-
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- scp->addr.sdn_flags = 0;
- scp->addr.sdn_objnum = 0;
-
- /*
- * This stuff is to keep compatibility with Eduardo's
- * patch. I hope I can dispense with it shortly...
- */
- if ((scp->accessdata.acc_accl != 0) &&
- (scp->accessdata.acc_accl <= 12)) {
-
- scp->addr.sdn_objnamel = cpu_to_le16(scp->accessdata.acc_accl);
- memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, le16_to_cpu(scp->addr.sdn_objnamel));
-
- scp->accessdata.acc_accl = 0;
- memset(scp->accessdata.acc_acc, 0, 40);
- }
- /* End of compatibility stuff */
-
- scp->addr.sdn_add.a_len = cpu_to_le16(2);
- rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr);
- if (rv == 0) {
- rv = dn_hash_sock(sk);
- if (rv)
- sock_set_flag(sk, SOCK_ZAPPED);
- }
-
- return rv;
-}
-
-static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation)
-{
- struct dn_scp *scp = DN_SK(sk);
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int err;
-
- if (scp->state != DN_CR)
- return -EINVAL;
-
- scp->state = DN_CC;
- scp->segsize_loc = dst_metric_advmss(__sk_dst_get(sk));
- dn_send_conn_conf(sk, allocation);
-
- add_wait_queue(sk_sleep(sk), &wait);
- for(;;) {
- release_sock(sk);
- if (scp->state == DN_CC)
- *timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
- lock_sock(sk);
- err = 0;
- if (scp->state == DN_RUN)
- break;
- err = sock_error(sk);
- if (err)
- break;
- err = sock_intr_errno(*timeo);
- if (signal_pending(current))
- break;
- err = -EAGAIN;
- if (!*timeo)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
- if (err == 0) {
- sk->sk_socket->state = SS_CONNECTED;
- } else if (scp->state != DN_CC) {
- sk->sk_socket->state = SS_UNCONNECTED;
- }
- return err;
-}
-
-static int dn_wait_run(struct sock *sk, long *timeo)
-{
- struct dn_scp *scp = DN_SK(sk);
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int err = 0;
-
- if (scp->state == DN_RUN)
- goto out;
-
- if (!*timeo)
- return -EALREADY;
-
- add_wait_queue(sk_sleep(sk), &wait);
- for(;;) {
- release_sock(sk);
- if (scp->state == DN_CI || scp->state == DN_CC)
- *timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
- lock_sock(sk);
- err = 0;
- if (scp->state == DN_RUN)
- break;
- err = sock_error(sk);
- if (err)
- break;
- err = sock_intr_errno(*timeo);
- if (signal_pending(current))
- break;
- err = -ETIMEDOUT;
- if (!*timeo)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
-out:
- if (err == 0) {
- sk->sk_socket->state = SS_CONNECTED;
- } else if (scp->state != DN_CI && scp->state != DN_CC) {
- sk->sk_socket->state = SS_UNCONNECTED;
- }
- return err;
-}
-
-static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
-{
- struct socket *sock = sk->sk_socket;
- struct dn_scp *scp = DN_SK(sk);
- int err = -EISCONN;
- struct flowidn fld;
- struct dst_entry *dst;
-
- if (sock->state == SS_CONNECTED)
- goto out;
-
- if (sock->state == SS_CONNECTING) {
- err = 0;
- if (scp->state == DN_RUN) {
- sock->state = SS_CONNECTED;
- goto out;
- }
- err = -ECONNREFUSED;
- if (scp->state != DN_CI && scp->state != DN_CC) {
- sock->state = SS_UNCONNECTED;
- goto out;
- }
- return dn_wait_run(sk, timeo);
- }
-
- err = -EINVAL;
- if (scp->state != DN_O)
- goto out;
-
- if (addr == NULL || addrlen != sizeof(struct sockaddr_dn))
- goto out;
- if (addr->sdn_family != AF_DECnet)
- goto out;
- if (addr->sdn_flags & SDF_WILD)
- goto out;
-
- if (sock_flag(sk, SOCK_ZAPPED)) {
- err = dn_auto_bind(sk->sk_socket);
- if (err)
- goto out;
- }
-
- memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn));
-
- err = -EHOSTUNREACH;
- memset(&fld, 0, sizeof(fld));
- fld.flowidn_oif = sk->sk_bound_dev_if;
- fld.daddr = dn_saddr2dn(&scp->peer);
- fld.saddr = dn_saddr2dn(&scp->addr);
- dn_sk_ports_copy(&fld, scp);
- fld.flowidn_proto = DNPROTO_NSP;
- if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, flags) < 0)
- goto out;
- dst = __sk_dst_get(sk);
- sk->sk_route_caps = dst->dev->features;
- sock->state = SS_CONNECTING;
- scp->state = DN_CI;
- scp->segsize_loc = dst_metric_advmss(dst);
-
- dn_nsp_send_conninit(sk, NSP_CI);
- err = -EINPROGRESS;
- if (*timeo) {
- err = dn_wait_run(sk, timeo);
- }
-out:
- return err;
-}
-
-static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags)
-{
- struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr;
- struct sock *sk = sock->sk;
- int err;
- long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
-
- lock_sock(sk);
- err = __dn_connect(sk, addr, addrlen, &timeo, 0);
- release_sock(sk);
-
- return err;
-}
-
-static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- switch (scp->state) {
- case DN_RUN:
- return 0;
- case DN_CR:
- return dn_confirm_accept(sk, timeo, sk->sk_allocation);
- case DN_CI:
- case DN_CC:
- return dn_wait_run(sk, timeo);
- case DN_O:
- return __dn_connect(sk, addr, addrlen, timeo, flags);
- }
-
- return -EINVAL;
-}
-
-
-static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc)
-{
- unsigned char *ptr = skb->data;
-
- acc->acc_userl = *ptr++;
- memcpy(&acc->acc_user, ptr, acc->acc_userl);
- ptr += acc->acc_userl;
-
- acc->acc_passl = *ptr++;
- memcpy(&acc->acc_pass, ptr, acc->acc_passl);
- ptr += acc->acc_passl;
-
- acc->acc_accl = *ptr++;
- memcpy(&acc->acc_acc, ptr, acc->acc_accl);
-
- skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3);
-
-}
-
-static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt)
-{
- unsigned char *ptr = skb->data;
- u16 len = *ptr++; /* yes, it's 8bit on the wire */
-
- BUG_ON(len > 16); /* we've checked the contents earlier */
- opt->opt_optl = cpu_to_le16(len);
- opt->opt_status = 0;
- memcpy(opt->opt_data, ptr, len);
- skb_pull(skb, len + 1);
-}
-
-static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo)
-{
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- struct sk_buff *skb = NULL;
- int err = 0;
-
- add_wait_queue(sk_sleep(sk), &wait);
- for(;;) {
- release_sock(sk);
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb == NULL) {
- *timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
- skb = skb_dequeue(&sk->sk_receive_queue);
- }
- lock_sock(sk);
- if (skb != NULL)
- break;
- err = -EINVAL;
- if (sk->sk_state != TCP_LISTEN)
- break;
- err = sock_intr_errno(*timeo);
- if (signal_pending(current))
- break;
- err = -EAGAIN;
- if (!*timeo)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
-
- return skb == NULL ? ERR_PTR(err) : skb;
-}
-
-static int dn_accept(struct socket *sock, struct socket *newsock, int flags,
- bool kern)
-{
- struct sock *sk = sock->sk, *newsk;
- struct sk_buff *skb = NULL;
- struct dn_skb_cb *cb;
- unsigned char menuver;
- int err = 0;
- unsigned char type;
- long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
- struct dst_entry *dst;
-
- lock_sock(sk);
-
- if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) {
- release_sock(sk);
- return -EINVAL;
- }
-
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb == NULL) {
- skb = dn_wait_for_connect(sk, &timeo);
- if (IS_ERR(skb)) {
- release_sock(sk);
- return PTR_ERR(skb);
- }
- }
-
- cb = DN_SKB_CB(skb);
- sk_acceptq_removed(sk);
- newsk = dn_alloc_sock(sock_net(sk), newsock, sk->sk_allocation, kern);
- if (newsk == NULL) {
- release_sock(sk);
- kfree_skb(skb);
- return -ENOBUFS;
- }
- release_sock(sk);
-
- dst = skb_dst(skb);
- sk_dst_set(newsk, dst);
- skb_dst_set(skb, NULL);
-
- DN_SK(newsk)->state = DN_CR;
- DN_SK(newsk)->addrrem = cb->src_port;
- DN_SK(newsk)->services_rem = cb->services;
- DN_SK(newsk)->info_rem = cb->info;
- DN_SK(newsk)->segsize_rem = cb->segsize;
- DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode;
-
- if (DN_SK(newsk)->segsize_rem < 230)
- DN_SK(newsk)->segsize_rem = 230;
-
- if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
- DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd;
-
- newsk->sk_state = TCP_LISTEN;
- memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn));
-
- /*
- * If we are listening on a wild socket, we don't want
- * the newly created socket on the wrong hash queue.
- */
- DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD;
-
- skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type));
- skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type));
- *(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src;
- *(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst;
-
- menuver = *skb->data;
- skb_pull(skb, 1);
-
- if (menuver & DN_MENUVER_ACC)
- dn_access_copy(skb, &(DN_SK(newsk)->accessdata));
-
- if (menuver & DN_MENUVER_USR)
- dn_user_copy(skb, &(DN_SK(newsk)->conndata_in));
-
- if (menuver & DN_MENUVER_PRX)
- DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY;
-
- if (menuver & DN_MENUVER_UIC)
- DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY;
-
- kfree_skb(skb);
-
- memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out),
- sizeof(struct optdata_dn));
- memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out),
- sizeof(struct optdata_dn));
-
- lock_sock(newsk);
- err = dn_hash_sock(newsk);
- if (err == 0) {
- sock_reset_flag(newsk, SOCK_ZAPPED);
- dn_send_conn_ack(newsk);
-
- /*
- * Here we use sk->sk_allocation since although the conn conf is
- * for the newsk, the context is the old socket.
- */
- if (DN_SK(newsk)->accept_mode == ACC_IMMED)
- err = dn_confirm_accept(newsk, &timeo,
- sk->sk_allocation);
- }
- release_sock(newsk);
- return err;
-}
-
-
-static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int peer)
-{
- struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr;
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
-
- lock_sock(sk);
-
- if (peer) {
- if ((sock->state != SS_CONNECTED &&
- sock->state != SS_CONNECTING) &&
- scp->accept_mode == ACC_IMMED) {
- release_sock(sk);
- return -ENOTCONN;
- }
-
- memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn));
- } else {
- memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn));
- }
-
- release_sock(sk);
-
- return sizeof(struct sockaddr_dn);
-}
-
-
-static __poll_t dn_poll(struct file *file, struct socket *sock, poll_table *wait)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- __poll_t mask = datagram_poll(file, sock, wait);
-
- if (!skb_queue_empty_lockless(&scp->other_receive_queue))
- mask |= EPOLLRDBAND;
-
- return mask;
-}
-
-static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- int err = -EOPNOTSUPP;
- long amount = 0;
- struct sk_buff *skb;
- int val;
-
- switch(cmd)
- {
- case SIOCGIFADDR:
- case SIOCSIFADDR:
- return dn_dev_ioctl(cmd, (void __user *)arg);
-
- case SIOCATMARK:
- lock_sock(sk);
- val = !skb_queue_empty(&scp->other_receive_queue);
- if (scp->state != DN_RUN)
- val = -ENOTCONN;
- release_sock(sk);
- return val;
-
- case TIOCOUTQ:
- amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
- if (amount < 0)
- amount = 0;
- err = put_user(amount, (int __user *)arg);
- break;
-
- case TIOCINQ:
- lock_sock(sk);
- skb = skb_peek(&scp->other_receive_queue);
- if (skb) {
- amount = skb->len;
- } else {
- skb_queue_walk(&sk->sk_receive_queue, skb)
- amount += skb->len;
- }
- release_sock(sk);
- err = put_user(amount, (int __user *)arg);
- break;
-
- default:
- err = -ENOIOCTLCMD;
- break;
- }
-
- return err;
-}
-
-static int dn_listen(struct socket *sock, int backlog)
-{
- struct sock *sk = sock->sk;
- int err = -EINVAL;
-
- lock_sock(sk);
-
- if (sock_flag(sk, SOCK_ZAPPED))
- goto out;
-
- if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN))
- goto out;
-
- sk->sk_max_ack_backlog = backlog;
- sk->sk_ack_backlog = 0;
- sk->sk_state = TCP_LISTEN;
- err = 0;
- dn_rehash_sock(sk);
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-
-static int dn_shutdown(struct socket *sock, int how)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- int err = -ENOTCONN;
-
- lock_sock(sk);
-
- if (sock->state == SS_UNCONNECTED)
- goto out;
-
- err = 0;
- if (sock->state == SS_DISCONNECTING)
- goto out;
-
- err = -EINVAL;
- if (scp->state == DN_O)
- goto out;
-
- if (how != SHUT_RDWR)
- goto out;
-
- sk->sk_shutdown = SHUTDOWN_MASK;
- dn_destroy_sock(sk);
- err = 0;
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-static int dn_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- int err;
-
- lock_sock(sk);
- err = __dn_setsockopt(sock, level, optname, optval, optlen, 0);
- release_sock(sk);
-#ifdef CONFIG_NETFILTER
- /* we need to exclude all possible ENOPROTOOPTs except default case */
- if (err == -ENOPROTOOPT && optname != DSO_LINKINFO &&
- optname != DSO_STREAM && optname != DSO_SEQPACKET)
- err = nf_setsockopt(sk, PF_DECnet, optname, optval, optlen);
-#endif
-
- return err;
-}
-
-static int __dn_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen, int flags)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- long timeo;
- union {
- struct optdata_dn opt;
- struct accessdata_dn acc;
- int mode;
- unsigned long win;
- int val;
- unsigned char services;
- unsigned char info;
- } u;
- int err;
-
- if (optlen && sockptr_is_null(optval))
- return -EINVAL;
-
- if (optlen > sizeof(u))
- return -EINVAL;
-
- if (copy_from_sockptr(&u, optval, optlen))
- return -EFAULT;
-
- switch (optname) {
- case DSO_CONDATA:
- if (sock->state == SS_CONNECTED)
- return -EISCONN;
- if ((scp->state != DN_O) && (scp->state != DN_CR))
- return -EINVAL;
-
- if (optlen != sizeof(struct optdata_dn))
- return -EINVAL;
-
- if (le16_to_cpu(u.opt.opt_optl) > 16)
- return -EINVAL;
-
- memcpy(&scp->conndata_out, &u.opt, optlen);
- break;
-
- case DSO_DISDATA:
- if (sock->state != SS_CONNECTED &&
- scp->accept_mode == ACC_IMMED)
- return -ENOTCONN;
-
- if (optlen != sizeof(struct optdata_dn))
- return -EINVAL;
-
- if (le16_to_cpu(u.opt.opt_optl) > 16)
- return -EINVAL;
-
- memcpy(&scp->discdata_out, &u.opt, optlen);
- break;
-
- case DSO_CONACCESS:
- if (sock->state == SS_CONNECTED)
- return -EISCONN;
- if (scp->state != DN_O)
- return -EINVAL;
-
- if (optlen != sizeof(struct accessdata_dn))
- return -EINVAL;
-
- if ((u.acc.acc_accl > DN_MAXACCL) ||
- (u.acc.acc_passl > DN_MAXACCL) ||
- (u.acc.acc_userl > DN_MAXACCL))
- return -EINVAL;
-
- memcpy(&scp->accessdata, &u.acc, optlen);
- break;
-
- case DSO_ACCEPTMODE:
- if (sock->state == SS_CONNECTED)
- return -EISCONN;
- if (scp->state != DN_O)
- return -EINVAL;
-
- if (optlen != sizeof(int))
- return -EINVAL;
-
- if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER))
- return -EINVAL;
-
- scp->accept_mode = (unsigned char)u.mode;
- break;
-
- case DSO_CONACCEPT:
- if (scp->state != DN_CR)
- return -EINVAL;
- timeo = sock_rcvtimeo(sk, 0);
- err = dn_confirm_accept(sk, &timeo, sk->sk_allocation);
- return err;
-
- case DSO_CONREJECT:
- if (scp->state != DN_CR)
- return -EINVAL;
-
- scp->state = DN_DR;
- sk->sk_shutdown = SHUTDOWN_MASK;
- dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation);
- break;
-
- case DSO_MAXWINDOW:
- if (optlen != sizeof(unsigned long))
- return -EINVAL;
- if (u.win > NSP_MAX_WINDOW)
- u.win = NSP_MAX_WINDOW;
- if (u.win == 0)
- return -EINVAL;
- scp->max_window = u.win;
- if (scp->snd_window > u.win)
- scp->snd_window = u.win;
- break;
-
- case DSO_NODELAY:
- if (optlen != sizeof(int))
- return -EINVAL;
- if (scp->nonagle == TCP_NAGLE_CORK)
- return -EINVAL;
- scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_OFF;
- /* if (scp->nonagle == 1) { Push pending frames } */
- break;
-
- case DSO_CORK:
- if (optlen != sizeof(int))
- return -EINVAL;
- if (scp->nonagle == TCP_NAGLE_OFF)
- return -EINVAL;
- scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_CORK;
- /* if (scp->nonagle == 0) { Push pending frames } */
- break;
-
- case DSO_SERVICES:
- if (optlen != sizeof(unsigned char))
- return -EINVAL;
- if ((u.services & ~NSP_FC_MASK) != 0x01)
- return -EINVAL;
- if ((u.services & NSP_FC_MASK) == NSP_FC_MASK)
- return -EINVAL;
- scp->services_loc = u.services;
- break;
-
- case DSO_INFO:
- if (optlen != sizeof(unsigned char))
- return -EINVAL;
- if (u.info & 0xfc)
- return -EINVAL;
- scp->info_loc = u.info;
- break;
-
- case DSO_LINKINFO:
- case DSO_STREAM:
- case DSO_SEQPACKET:
- default:
- return -ENOPROTOOPT;
- }
-
- return 0;
-}
-
-static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
-{
- struct sock *sk = sock->sk;
- int err;
-
- lock_sock(sk);
- err = __dn_getsockopt(sock, level, optname, optval, optlen, 0);
- release_sock(sk);
-#ifdef CONFIG_NETFILTER
- if (err == -ENOPROTOOPT && optname != DSO_STREAM &&
- optname != DSO_SEQPACKET && optname != DSO_CONACCEPT &&
- optname != DSO_CONREJECT) {
- int len;
-
- if (get_user(len, optlen))
- return -EFAULT;
-
- err = nf_getsockopt(sk, PF_DECnet, optname, optval, &len);
- if (err >= 0)
- err = put_user(len, optlen);
- }
-#endif
-
- return err;
-}
-
-static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct linkinfo_dn link;
- unsigned int r_len;
- void *r_data = NULL;
- unsigned int val;
-
- if(get_user(r_len , optlen))
- return -EFAULT;
-
- switch (optname) {
- case DSO_CONDATA:
- if (r_len > sizeof(struct optdata_dn))
- r_len = sizeof(struct optdata_dn);
- r_data = &scp->conndata_in;
- break;
-
- case DSO_DISDATA:
- if (r_len > sizeof(struct optdata_dn))
- r_len = sizeof(struct optdata_dn);
- r_data = &scp->discdata_in;
- break;
-
- case DSO_CONACCESS:
- if (r_len > sizeof(struct accessdata_dn))
- r_len = sizeof(struct accessdata_dn);
- r_data = &scp->accessdata;
- break;
-
- case DSO_ACCEPTMODE:
- if (r_len > sizeof(unsigned char))
- r_len = sizeof(unsigned char);
- r_data = &scp->accept_mode;
- break;
-
- case DSO_LINKINFO:
- if (r_len > sizeof(struct linkinfo_dn))
- r_len = sizeof(struct linkinfo_dn);
-
- memset(&link, 0, sizeof(link));
-
- switch (sock->state) {
- case SS_CONNECTING:
- link.idn_linkstate = LL_CONNECTING;
- break;
- case SS_DISCONNECTING:
- link.idn_linkstate = LL_DISCONNECTING;
- break;
- case SS_CONNECTED:
- link.idn_linkstate = LL_RUNNING;
- break;
- default:
- link.idn_linkstate = LL_INACTIVE;
- }
-
- link.idn_segsize = scp->segsize_rem;
- r_data = &link;
- break;
-
- case DSO_MAXWINDOW:
- if (r_len > sizeof(unsigned long))
- r_len = sizeof(unsigned long);
- r_data = &scp->max_window;
- break;
-
- case DSO_NODELAY:
- if (r_len > sizeof(int))
- r_len = sizeof(int);
- val = (scp->nonagle == TCP_NAGLE_OFF);
- r_data = &val;
- break;
-
- case DSO_CORK:
- if (r_len > sizeof(int))
- r_len = sizeof(int);
- val = (scp->nonagle == TCP_NAGLE_CORK);
- r_data = &val;
- break;
-
- case DSO_SERVICES:
- if (r_len > sizeof(unsigned char))
- r_len = sizeof(unsigned char);
- r_data = &scp->services_rem;
- break;
-
- case DSO_INFO:
- if (r_len > sizeof(unsigned char))
- r_len = sizeof(unsigned char);
- r_data = &scp->info_rem;
- break;
-
- case DSO_STREAM:
- case DSO_SEQPACKET:
- case DSO_CONACCEPT:
- case DSO_CONREJECT:
- default:
- return -ENOPROTOOPT;
- }
-
- if (r_data) {
- if (copy_to_user(optval, r_data, r_len))
- return -EFAULT;
- if (put_user(r_len, optlen))
- return -EFAULT;
- }
-
- return 0;
-}
-
-
-static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target)
-{
- struct sk_buff *skb;
- int len = 0;
-
- if (flags & MSG_OOB)
- return !skb_queue_empty(q) ? 1 : 0;
-
- skb_queue_walk(q, skb) {
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- len += skb->len;
-
- if (cb->nsp_flags & 0x40) {
- /* SOCK_SEQPACKET reads to EOM */
- if (sk->sk_type == SOCK_SEQPACKET)
- return 1;
- /* so does SOCK_STREAM unless WAITALL is specified */
- if (!(flags & MSG_WAITALL))
- return 1;
- }
-
- /* minimum data length for read exceeded */
- if (len >= target)
- return 1;
- }
-
- return 0;
-}
-
-
-static int dn_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
- int flags)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff_head *queue = &sk->sk_receive_queue;
- size_t target = size > 1 ? 1 : 0;
- size_t copied = 0;
- int rv = 0;
- struct sk_buff *skb, *n;
- struct dn_skb_cb *cb = NULL;
- unsigned char eor = 0;
- long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
-
- lock_sock(sk);
-
- if (sock_flag(sk, SOCK_ZAPPED)) {
- rv = -EADDRNOTAVAIL;
- goto out;
- }
-
- if (sk->sk_shutdown & RCV_SHUTDOWN) {
- rv = 0;
- goto out;
- }
-
- rv = dn_check_state(sk, NULL, 0, &timeo, flags);
- if (rv)
- goto out;
-
- if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) {
- rv = -EOPNOTSUPP;
- goto out;
- }
-
- if (flags & MSG_OOB)
- queue = &scp->other_receive_queue;
-
- if (flags & MSG_WAITALL)
- target = size;
-
-
- /*
- * See if there is data ready to read, sleep if there isn't
- */
- for(;;) {
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
- if (sk->sk_err)
- goto out;
-
- if (!skb_queue_empty(&scp->other_receive_queue)) {
- if (!(flags & MSG_OOB)) {
- msg->msg_flags |= MSG_OOB;
- if (!scp->other_report) {
- scp->other_report = 1;
- goto out;
- }
- }
- }
-
- if (scp->state != DN_RUN)
- goto out;
-
- if (signal_pending(current)) {
- rv = sock_intr_errno(timeo);
- goto out;
- }
-
- if (dn_data_ready(sk, queue, flags, target))
- break;
-
- if (flags & MSG_DONTWAIT) {
- rv = -EWOULDBLOCK;
- goto out;
- }
-
- add_wait_queue(sk_sleep(sk), &wait);
- sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- sk_wait_event(sk, &timeo, dn_data_ready(sk, queue, flags, target), &wait);
- sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- remove_wait_queue(sk_sleep(sk), &wait);
- }
-
- skb_queue_walk_safe(queue, skb, n) {
- unsigned int chunk = skb->len;
- cb = DN_SKB_CB(skb);
-
- if ((chunk + copied) > size)
- chunk = size - copied;
-
- if (memcpy_to_msg(msg, skb->data, chunk)) {
- rv = -EFAULT;
- break;
- }
- copied += chunk;
-
- if (!(flags & MSG_PEEK))
- skb_pull(skb, chunk);
-
- eor = cb->nsp_flags & 0x40;
-
- if (skb->len == 0) {
- skb_unlink(skb, queue);
- kfree_skb(skb);
- /*
- * N.B. Don't refer to skb or cb after this point
- * in loop.
- */
- if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) {
- scp->flowloc_sw = DN_SEND;
- dn_nsp_send_link(sk, DN_SEND, 0);
- }
- }
-
- if (eor) {
- if (sk->sk_type == SOCK_SEQPACKET)
- break;
- if (!(flags & MSG_WAITALL))
- break;
- }
-
- if (flags & MSG_OOB)
- break;
-
- if (copied >= target)
- break;
- }
-
- rv = copied;
-
-
- if (eor && (sk->sk_type == SOCK_SEQPACKET))
- msg->msg_flags |= MSG_EOR;
-
-out:
- if (rv == 0)
- rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk);
-
- if ((rv >= 0) && msg->msg_name) {
- __sockaddr_check_size(sizeof(struct sockaddr_dn));
- memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn));
- msg->msg_namelen = sizeof(struct sockaddr_dn);
- }
-
- release_sock(sk);
-
- return rv;
-}
-
-
-static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags)
-{
- unsigned char fctype = scp->services_rem & NSP_FC_MASK;
- if (skb_queue_len(queue) >= scp->snd_window)
- return 1;
- if (fctype != NSP_FC_NONE) {
- if (flags & MSG_OOB) {
- if (scp->flowrem_oth == 0)
- return 1;
- } else {
- if (scp->flowrem_dat == 0)
- return 1;
- }
- }
- return 0;
-}
-
-/*
- * The DECnet spec requires that the "routing layer" accepts packets which
- * are at least 230 bytes in size. This excludes any headers which the NSP
- * layer might add, so we always assume that we'll be using the maximal
- * length header on data packets. The variation in length is due to the
- * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't
- * make much practical difference.
- */
-unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu)
-{
- unsigned int mss = 230 - DN_MAX_NSP_DATA_HEADER;
- if (dev) {
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
- mtu -= LL_RESERVED_SPACE(dev);
- if (dn_db->use_long)
- mtu -= 21;
- else
- mtu -= 6;
- mtu -= DN_MAX_NSP_DATA_HEADER;
- } else {
- /*
- * 21 = long header, 16 = guess at MAC header length
- */
- mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16);
- }
- if (mtu > mss)
- mss = mtu;
- return mss;
-}
-
-static inline unsigned int dn_current_mss(struct sock *sk, int flags)
-{
- struct dst_entry *dst = __sk_dst_get(sk);
- struct dn_scp *scp = DN_SK(sk);
- int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem);
-
- /* Other data messages are limited to 16 bytes per packet */
- if (flags & MSG_OOB)
- return 16;
-
- /* This works out the maximum size of segment we can send out */
- if (dst) {
- u32 mtu = dst_mtu(dst);
- mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now);
- }
-
- return mss_now;
-}
-
-/*
- * N.B. We get the timeout wrong here, but then we always did get it
- * wrong before and this is another step along the road to correcting
- * it. It ought to get updated each time we pass through the routine,
- * but in practise it probably doesn't matter too much for now.
- */
-static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk,
- unsigned long datalen, int noblock,
- int *errcode)
-{
- struct sk_buff *skb = sock_alloc_send_skb(sk, datalen,
- noblock, errcode);
- if (skb) {
- skb->protocol = htons(ETH_P_DNA_RT);
- skb->pkt_type = PACKET_OUTGOING;
- }
- return skb;
-}
-
-static int dn_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- size_t mss;
- struct sk_buff_head *queue = &scp->data_xmit_queue;
- int flags = msg->msg_flags;
- int err = 0;
- size_t sent = 0;
- int addr_len = msg->msg_namelen;
- DECLARE_SOCKADDR(struct sockaddr_dn *, addr, msg->msg_name);
- struct sk_buff *skb = NULL;
- struct dn_skb_cb *cb;
- size_t len;
- unsigned char fctype;
- long timeo;
-
- if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT))
- return -EOPNOTSUPP;
-
- if (addr_len && (addr_len != sizeof(struct sockaddr_dn)))
- return -EINVAL;
-
- lock_sock(sk);
- timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
- /*
- * The only difference between stream sockets and sequenced packet
- * sockets is that the stream sockets always behave as if MSG_EOR
- * has been set.
- */
- if (sock->type == SOCK_STREAM) {
- if (flags & MSG_EOR) {
- err = -EINVAL;
- goto out;
- }
- flags |= MSG_EOR;
- }
-
-
- err = dn_check_state(sk, addr, addr_len, &timeo, flags);
- if (err)
- goto out_err;
-
- if (sk->sk_shutdown & SEND_SHUTDOWN) {
- err = -EPIPE;
- if (!(flags & MSG_NOSIGNAL))
- send_sig(SIGPIPE, current, 0);
- goto out_err;
- }
-
- if ((flags & MSG_TRYHARD) && sk->sk_dst_cache)
- dst_negative_advice(sk);
-
- mss = scp->segsize_rem;
- fctype = scp->services_rem & NSP_FC_MASK;
-
- mss = dn_current_mss(sk, flags);
-
- if (flags & MSG_OOB) {
- queue = &scp->other_xmit_queue;
- if (size > mss) {
- err = -EMSGSIZE;
- goto out;
- }
- }
-
- scp->persist_fxn = dn_nsp_xmit_timeout;
-
- while(sent < size) {
- err = sock_error(sk);
- if (err)
- goto out;
-
- if (signal_pending(current)) {
- err = sock_intr_errno(timeo);
- goto out;
- }
-
- /*
- * Calculate size that we wish to send.
- */
- len = size - sent;
-
- if (len > mss)
- len = mss;
-
- /*
- * Wait for queue size to go down below the window
- * size.
- */
- if (dn_queue_too_long(scp, queue, flags)) {
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
- if (flags & MSG_DONTWAIT) {
- err = -EWOULDBLOCK;
- goto out;
- }
-
- add_wait_queue(sk_sleep(sk), &wait);
- sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- sk_wait_event(sk, &timeo,
- !dn_queue_too_long(scp, queue, flags), &wait);
- sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- remove_wait_queue(sk_sleep(sk), &wait);
- continue;
- }
-
- /*
- * Get a suitably sized skb.
- * 64 is a bit of a hack really, but its larger than any
- * link-layer headers and has served us well as a good
- * guess as to their real length.
- */
- skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER,
- flags & MSG_DONTWAIT, &err);
-
- if (err)
- break;
-
- if (!skb)
- continue;
-
- cb = DN_SKB_CB(skb);
-
- skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER);
-
- if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
- err = -EFAULT;
- goto out;
- }
-
- if (flags & MSG_OOB) {
- cb->nsp_flags = 0x30;
- if (fctype != NSP_FC_NONE)
- scp->flowrem_oth--;
- } else {
- cb->nsp_flags = 0x00;
- if (scp->seg_total == 0)
- cb->nsp_flags |= 0x20;
-
- scp->seg_total += len;
-
- if (((sent + len) == size) && (flags & MSG_EOR)) {
- cb->nsp_flags |= 0x40;
- scp->seg_total = 0;
- if (fctype == NSP_FC_SCMC)
- scp->flowrem_dat--;
- }
- if (fctype == NSP_FC_SRC)
- scp->flowrem_dat--;
- }
-
- sent += len;
- dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB);
- skb = NULL;
-
- scp->persist = dn_nsp_persist(sk);
-
- }
-out:
-
- kfree_skb(skb);
-
- release_sock(sk);
-
- return sent ? sent : err;
-
-out_err:
- err = sk_stream_error(sk, flags, err);
- release_sock(sk);
- return err;
-}
-
-static int dn_device_event(struct notifier_block *this, unsigned long event,
- void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- switch (event) {
- case NETDEV_UP:
- dn_dev_up(dev);
- break;
- case NETDEV_DOWN:
- dn_dev_down(dev);
- break;
- default:
- break;
- }
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block dn_dev_notifier = {
- .notifier_call = dn_device_event,
-};
-
-static struct packet_type dn_dix_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_DNA_RT),
- .func = dn_route_rcv,
-};
-
-#ifdef CONFIG_PROC_FS
-struct dn_iter_state {
- int bucket;
-};
-
-static struct sock *dn_socket_get_first(struct seq_file *seq)
-{
- struct dn_iter_state *state = seq->private;
- struct sock *n = NULL;
-
- for(state->bucket = 0;
- state->bucket < DN_SK_HASH_SIZE;
- ++state->bucket) {
- n = sk_head(&dn_sk_hash[state->bucket]);
- if (n)
- break;
- }
-
- return n;
-}
-
-static struct sock *dn_socket_get_next(struct seq_file *seq,
- struct sock *n)
-{
- struct dn_iter_state *state = seq->private;
-
- n = sk_next(n);
- while (!n) {
- if (++state->bucket >= DN_SK_HASH_SIZE)
- break;
- n = sk_head(&dn_sk_hash[state->bucket]);
- }
- return n;
-}
-
-static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos)
-{
- struct sock *sk = dn_socket_get_first(seq);
-
- if (sk) {
- while(*pos && (sk = dn_socket_get_next(seq, sk)))
- --*pos;
- }
- return *pos ? NULL : sk;
-}
-
-static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos)
-{
- void *rc;
- read_lock_bh(&dn_hash_lock);
- rc = socket_get_idx(seq, &pos);
- if (!rc) {
- read_unlock_bh(&dn_hash_lock);
- }
- return rc;
-}
-
-static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos)
-{
- return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
-}
-
-static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- void *rc;
-
- if (v == SEQ_START_TOKEN) {
- rc = dn_socket_get_idx(seq, 0);
- goto out;
- }
-
- rc = dn_socket_get_next(seq, v);
- if (rc)
- goto out;
- read_unlock_bh(&dn_hash_lock);
-out:
- ++*pos;
- return rc;
-}
-
-static void dn_socket_seq_stop(struct seq_file *seq, void *v)
-{
- if (v && v != SEQ_START_TOKEN)
- read_unlock_bh(&dn_hash_lock);
-}
-
-#define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126)
-
-static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf)
-{
- int i;
-
- switch (le16_to_cpu(dn->sdn_objnamel)) {
- case 0:
- sprintf(buf, "%d", dn->sdn_objnum);
- break;
- default:
- for (i = 0; i < le16_to_cpu(dn->sdn_objnamel); i++) {
- buf[i] = dn->sdn_objname[i];
- if (IS_NOT_PRINTABLE(buf[i]))
- buf[i] = '.';
- }
- buf[i] = 0;
- }
-}
-
-static char *dn_state2asc(unsigned char state)
-{
- switch (state) {
- case DN_O:
- return "OPEN";
- case DN_CR:
- return " CR";
- case DN_DR:
- return " DR";
- case DN_DRC:
- return " DRC";
- case DN_CC:
- return " CC";
- case DN_CI:
- return " CI";
- case DN_NR:
- return " NR";
- case DN_NC:
- return " NC";
- case DN_CD:
- return " CD";
- case DN_RJ:
- return " RJ";
- case DN_RUN:
- return " RUN";
- case DN_DI:
- return " DI";
- case DN_DIC:
- return " DIC";
- case DN_DN:
- return " DN";
- case DN_CL:
- return " CL";
- case DN_CN:
- return " CN";
- }
-
- return "????";
-}
-
-static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- char buf1[DN_ASCBUF_LEN];
- char buf2[DN_ASCBUF_LEN];
- char local_object[DN_MAXOBJL+3];
- char remote_object[DN_MAXOBJL+3];
-
- dn_printable_object(&scp->addr, local_object);
- dn_printable_object(&scp->peer, remote_object);
-
- seq_printf(seq,
- "%6s/%04X %04d:%04d %04d:%04d %01d %-16s "
- "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n",
- dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->addr)), buf1),
- scp->addrloc,
- scp->numdat,
- scp->numoth,
- scp->ackxmt_dat,
- scp->ackxmt_oth,
- scp->flowloc_sw,
- local_object,
- dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->peer)), buf2),
- scp->addrrem,
- scp->numdat_rcv,
- scp->numoth_rcv,
- scp->ackrcv_dat,
- scp->ackrcv_oth,
- scp->flowrem_sw,
- remote_object,
- dn_state2asc(scp->state),
- ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER"));
-}
-
-static int dn_socket_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN) {
- seq_puts(seq, "Local Remote\n");
- } else {
- dn_socket_format_entry(seq, v);
- }
- return 0;
-}
-
-static const struct seq_operations dn_socket_seq_ops = {
- .start = dn_socket_seq_start,
- .next = dn_socket_seq_next,
- .stop = dn_socket_seq_stop,
- .show = dn_socket_seq_show,
-};
-#endif
-
-static const struct net_proto_family dn_family_ops = {
- .family = AF_DECnet,
- .create = dn_create,
- .owner = THIS_MODULE,
-};
-
-static const struct proto_ops dn_proto_ops = {
- .family = AF_DECnet,
- .owner = THIS_MODULE,
- .release = dn_release,
- .bind = dn_bind,
- .connect = dn_connect,
- .socketpair = sock_no_socketpair,
- .accept = dn_accept,
- .getname = dn_getname,
- .poll = dn_poll,
- .ioctl = dn_ioctl,
- .listen = dn_listen,
- .shutdown = dn_shutdown,
- .setsockopt = dn_setsockopt,
- .getsockopt = dn_getsockopt,
- .sendmsg = dn_sendmsg,
- .recvmsg = dn_recvmsg,
- .mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
-};
-
-MODULE_DESCRIPTION("The Linux DECnet Network Protocol");
-MODULE_AUTHOR("Linux DECnet Project Team");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_DECnet);
-
-static const char banner[] __initconst = KERN_INFO
-"NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n";
-
-static int __init decnet_init(void)
-{
- int rc;
-
- printk(banner);
-
- rc = proto_register(&dn_proto, 1);
- if (rc != 0)
- goto out;
-
- dn_neigh_init();
- dn_dev_init();
- dn_route_init();
- dn_fib_init();
-
- sock_register(&dn_family_ops);
- dev_add_pack(&dn_dix_packet_type);
- register_netdevice_notifier(&dn_dev_notifier);
-
- proc_create_seq_private("decnet", 0444, init_net.proc_net,
- &dn_socket_seq_ops, sizeof(struct dn_iter_state),
- NULL);
- dn_register_sysctl();
-out:
- return rc;
-
-}
-module_init(decnet_init);
-
-/*
- * Prevent DECnet module unloading until its fixed properly.
- * Requires an audit of the code to check for memory leaks and
- * initialisation problems etc.
- */
-#if 0
-static void __exit decnet_exit(void)
-{
- sock_unregister(AF_DECnet);
- rtnl_unregister_all(PF_DECnet);
- dev_remove_pack(&dn_dix_packet_type);
-
- dn_unregister_sysctl();
-
- unregister_netdevice_notifier(&dn_dev_notifier);
-
- dn_route_cleanup();
- dn_dev_cleanup();
- dn_neigh_cleanup();
- dn_fib_cleanup();
-
- remove_proc_entry("decnet", init_net.proc_net);
-
- proto_unregister(&dn_proto);
-
- rcu_barrier(); /* Wait for completion of call_rcu()'s */
-}
-module_exit(decnet_exit);
-#endif