| |
| /* |
| * 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 |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| 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 int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *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_check(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, |
| .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 = sysctl_decnet_wmem[1]; |
| sk->sk_rcvbuf = 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; |
| /* fall through */ |
| case DN_DI: |
| case DN_DR: |
| disc_reject: |
| dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation); |
| /* fall through */ |
| 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"); |
| /* fall through */ |
| 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 > SK_PROTOCOL_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->sk_ack_backlog--; |
| 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, char __user *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, char __user *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 && !optval) |
| return -EINVAL; |
| |
| if (optlen > sizeof(u)) |
| return -EINVAL; |
| |
| if (copy_from_user(&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); |
| try_again: |
| if (n) |
| goto out; |
| if (++state->bucket >= DN_SK_HASH_SIZE) |
| goto out; |
| n = sk_head(&dn_sk_hash[state->bucket]); |
| goto try_again; |
| out: |
| 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_bh(); /* Wait for completion of call_rcu_bh()'s */ |
| } |
| module_exit(decnet_exit); |
| #endif |