| /* |
| * X.25 Packet Layer release 002 |
| * |
| * This is ALPHA test software. This code may break your machine, |
| * randomly fail to work with new releases, misbehave and/or generally |
| * screw up. It might even work. |
| * |
| * This code REQUIRES 2.1.15 or higher |
| * |
| * This module: |
| * This module 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 (at your option) any later version. |
| * |
| * History |
| * X.25 001 Jonathan Naylor Started coding. |
| * X.25 002 Jonathan Naylor Centralised disconnect handling. |
| * New timer architecture. |
| * 2000-03-11 Henner Eisen MSG_EOR handling more POSIX compliant. |
| * 2000-03-22 Daniela Squassoni Allowed disabling/enabling of |
| * facilities negotiation and increased |
| * the throughput upper limit. |
| * 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups |
| * 2000-09-04 Henner Eisen Set sock->state in x25_accept(). |
| * Fixed x25_output() related skb leakage. |
| * 2000-10-02 Henner Eisen Made x25_kick() single threaded per socket. |
| * 2000-10-27 Henner Eisen MSG_DONTWAIT for fragment allocation. |
| * 2000-11-14 Henner Eisen Closing datalink from NETDEV_GOING_DOWN |
| * 2002-10-06 Arnaldo C. Melo Get rid of cli/sti, move proc stuff to |
| * x25_proc.c, using seq_file |
| * 2005-04-02 Shaun Pereira Selective sub address matching |
| * with call user data |
| * 2005-04-15 Shaun Pereira Fast select with no restriction on |
| * response |
| */ |
| |
| #define pr_fmt(fmt) "X25: " fmt |
| |
| #include <linux/module.h> |
| #include <linux/capability.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/sched/signal.h> |
| #include <linux/timer.h> |
| #include <linux/string.h> |
| #include <linux/net.h> |
| #include <linux/netdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/skbuff.h> |
| #include <linux/slab.h> |
| #include <net/sock.h> |
| #include <net/tcp_states.h> |
| #include <linux/uaccess.h> |
| #include <linux/fcntl.h> |
| #include <linux/termios.h> /* For TIOCINQ/OUTQ */ |
| #include <linux/notifier.h> |
| #include <linux/init.h> |
| #include <linux/compat.h> |
| #include <linux/ctype.h> |
| |
| #include <net/x25.h> |
| #include <net/compat.h> |
| |
| int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20; |
| int sysctl_x25_call_request_timeout = X25_DEFAULT_T21; |
| int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22; |
| int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23; |
| int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2; |
| int sysctl_x25_forward = 0; |
| |
| HLIST_HEAD(x25_list); |
| DEFINE_RWLOCK(x25_list_lock); |
| |
| static const struct proto_ops x25_proto_ops; |
| |
| static const struct x25_address null_x25_address = {" "}; |
| |
| #ifdef CONFIG_COMPAT |
| struct compat_x25_subscrip_struct { |
| char device[200-sizeof(compat_ulong_t)]; |
| compat_ulong_t global_facil_mask; |
| compat_uint_t extended; |
| }; |
| #endif |
| |
| |
| int x25_parse_address_block(struct sk_buff *skb, |
| struct x25_address *called_addr, |
| struct x25_address *calling_addr) |
| { |
| unsigned char len; |
| int needed; |
| int rc; |
| |
| if (!pskb_may_pull(skb, 1)) { |
| /* packet has no address block */ |
| rc = 0; |
| goto empty; |
| } |
| |
| len = *skb->data; |
| needed = 1 + (len >> 4) + (len & 0x0f); |
| |
| if (!pskb_may_pull(skb, needed)) { |
| /* packet is too short to hold the addresses it claims |
| to hold */ |
| rc = -1; |
| goto empty; |
| } |
| |
| return x25_addr_ntoa(skb->data, called_addr, calling_addr); |
| |
| empty: |
| *called_addr->x25_addr = 0; |
| *calling_addr->x25_addr = 0; |
| |
| return rc; |
| } |
| |
| |
| int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr, |
| struct x25_address *calling_addr) |
| { |
| unsigned int called_len, calling_len; |
| char *called, *calling; |
| unsigned int i; |
| |
| called_len = (*p >> 0) & 0x0F; |
| calling_len = (*p >> 4) & 0x0F; |
| |
| called = called_addr->x25_addr; |
| calling = calling_addr->x25_addr; |
| p++; |
| |
| for (i = 0; i < (called_len + calling_len); i++) { |
| if (i < called_len) { |
| if (i % 2 != 0) { |
| *called++ = ((*p >> 0) & 0x0F) + '0'; |
| p++; |
| } else { |
| *called++ = ((*p >> 4) & 0x0F) + '0'; |
| } |
| } else { |
| if (i % 2 != 0) { |
| *calling++ = ((*p >> 0) & 0x0F) + '0'; |
| p++; |
| } else { |
| *calling++ = ((*p >> 4) & 0x0F) + '0'; |
| } |
| } |
| } |
| |
| *called = *calling = '\0'; |
| |
| return 1 + (called_len + calling_len + 1) / 2; |
| } |
| |
| int x25_addr_aton(unsigned char *p, struct x25_address *called_addr, |
| struct x25_address *calling_addr) |
| { |
| unsigned int called_len, calling_len; |
| char *called, *calling; |
| int i; |
| |
| called = called_addr->x25_addr; |
| calling = calling_addr->x25_addr; |
| |
| called_len = strlen(called); |
| calling_len = strlen(calling); |
| |
| *p++ = (calling_len << 4) | (called_len << 0); |
| |
| for (i = 0; i < (called_len + calling_len); i++) { |
| if (i < called_len) { |
| if (i % 2 != 0) { |
| *p |= (*called++ - '0') << 0; |
| p++; |
| } else { |
| *p = 0x00; |
| *p |= (*called++ - '0') << 4; |
| } |
| } else { |
| if (i % 2 != 0) { |
| *p |= (*calling++ - '0') << 0; |
| p++; |
| } else { |
| *p = 0x00; |
| *p |= (*calling++ - '0') << 4; |
| } |
| } |
| } |
| |
| return 1 + (called_len + calling_len + 1) / 2; |
| } |
| |
| /* |
| * Socket removal during an interrupt is now safe. |
| */ |
| static void x25_remove_socket(struct sock *sk) |
| { |
| write_lock_bh(&x25_list_lock); |
| sk_del_node_init(sk); |
| write_unlock_bh(&x25_list_lock); |
| } |
| |
| /* |
| * Kill all bound sockets on a dropped device. |
| */ |
| static void x25_kill_by_device(struct net_device *dev) |
| { |
| struct sock *s; |
| |
| write_lock_bh(&x25_list_lock); |
| |
| sk_for_each(s, &x25_list) |
| if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev) |
| x25_disconnect(s, ENETUNREACH, 0, 0); |
| |
| write_unlock_bh(&x25_list_lock); |
| } |
| |
| /* |
| * Handle device status changes. |
| */ |
| static int x25_device_event(struct notifier_block *this, unsigned long event, |
| void *ptr) |
| { |
| struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
| struct x25_neigh *nb; |
| |
| if (!net_eq(dev_net(dev), &init_net)) |
| return NOTIFY_DONE; |
| |
| if (dev->type == ARPHRD_X25 |
| #if IS_ENABLED(CONFIG_LLC) |
| || dev->type == ARPHRD_ETHER |
| #endif |
| ) { |
| switch (event) { |
| case NETDEV_UP: |
| x25_link_device_up(dev); |
| break; |
| case NETDEV_GOING_DOWN: |
| nb = x25_get_neigh(dev); |
| if (nb) { |
| x25_terminate_link(nb); |
| x25_neigh_put(nb); |
| } |
| break; |
| case NETDEV_DOWN: |
| x25_kill_by_device(dev); |
| x25_route_device_down(dev); |
| x25_link_device_down(dev); |
| break; |
| } |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| /* |
| * Add a socket to the bound sockets list. |
| */ |
| static void x25_insert_socket(struct sock *sk) |
| { |
| write_lock_bh(&x25_list_lock); |
| sk_add_node(sk, &x25_list); |
| write_unlock_bh(&x25_list_lock); |
| } |
| |
| /* |
| * Find a socket that wants to accept the Call Request we just |
| * received. Check the full list for an address/cud match. |
| * If no cuds match return the next_best thing, an address match. |
| * Note: if a listening socket has cud set it must only get calls |
| * with matching cud. |
| */ |
| static struct sock *x25_find_listener(struct x25_address *addr, |
| struct sk_buff *skb) |
| { |
| struct sock *s; |
| struct sock *next_best; |
| |
| read_lock_bh(&x25_list_lock); |
| next_best = NULL; |
| |
| sk_for_each(s, &x25_list) |
| if ((!strcmp(addr->x25_addr, |
| x25_sk(s)->source_addr.x25_addr) || |
| !strcmp(addr->x25_addr, |
| null_x25_address.x25_addr)) && |
| s->sk_state == TCP_LISTEN) { |
| /* |
| * Found a listening socket, now check the incoming |
| * call user data vs this sockets call user data |
| */ |
| if (x25_sk(s)->cudmatchlength > 0 && |
| skb->len >= x25_sk(s)->cudmatchlength) { |
| if((memcmp(x25_sk(s)->calluserdata.cuddata, |
| skb->data, |
| x25_sk(s)->cudmatchlength)) == 0) { |
| sock_hold(s); |
| goto found; |
| } |
| } else |
| next_best = s; |
| } |
| if (next_best) { |
| s = next_best; |
| sock_hold(s); |
| goto found; |
| } |
| s = NULL; |
| found: |
| read_unlock_bh(&x25_list_lock); |
| return s; |
| } |
| |
| /* |
| * Find a connected X.25 socket given my LCI and neighbour. |
| */ |
| static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb) |
| { |
| struct sock *s; |
| |
| sk_for_each(s, &x25_list) |
| if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) { |
| sock_hold(s); |
| goto found; |
| } |
| s = NULL; |
| found: |
| return s; |
| } |
| |
| struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb) |
| { |
| struct sock *s; |
| |
| read_lock_bh(&x25_list_lock); |
| s = __x25_find_socket(lci, nb); |
| read_unlock_bh(&x25_list_lock); |
| return s; |
| } |
| |
| /* |
| * Find a unique LCI for a given device. |
| */ |
| static unsigned int x25_new_lci(struct x25_neigh *nb) |
| { |
| unsigned int lci = 1; |
| struct sock *sk; |
| |
| read_lock_bh(&x25_list_lock); |
| |
| while ((sk = __x25_find_socket(lci, nb)) != NULL) { |
| sock_put(sk); |
| if (++lci == 4096) { |
| lci = 0; |
| break; |
| } |
| } |
| |
| read_unlock_bh(&x25_list_lock); |
| return lci; |
| } |
| |
| /* |
| * Deferred destroy. |
| */ |
| static void __x25_destroy_socket(struct sock *); |
| |
| /* |
| * handler for deferred kills. |
| */ |
| static void x25_destroy_timer(struct timer_list *t) |
| { |
| struct sock *sk = from_timer(sk, t, sk_timer); |
| |
| x25_destroy_socket_from_timer(sk); |
| } |
| |
| /* |
| * This is called from user mode and the timers. Thus it protects itself |
| * against interrupt users but doesn't worry about being called during |
| * work. Once it is removed from the queue no interrupt or bottom half |
| * will touch it and we are (fairly 8-) ) safe. |
| * Not static as it's used by the timer |
| */ |
| static void __x25_destroy_socket(struct sock *sk) |
| { |
| struct sk_buff *skb; |
| |
| x25_stop_heartbeat(sk); |
| x25_stop_timer(sk); |
| |
| x25_remove_socket(sk); |
| x25_clear_queues(sk); /* Flush the queues */ |
| |
| while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
| if (skb->sk != sk) { /* A pending connection */ |
| /* |
| * Queue the unaccepted socket for death |
| */ |
| skb->sk->sk_state = TCP_LISTEN; |
| sock_set_flag(skb->sk, SOCK_DEAD); |
| x25_start_heartbeat(skb->sk); |
| x25_sk(skb->sk)->state = X25_STATE_0; |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| if (sk_has_allocations(sk)) { |
| /* Defer: outstanding buffers */ |
| sk->sk_timer.expires = jiffies + 10 * HZ; |
| sk->sk_timer.function = x25_destroy_timer; |
| add_timer(&sk->sk_timer); |
| } else { |
| /* drop last reference so sock_put will free */ |
| __sock_put(sk); |
| } |
| } |
| |
| void x25_destroy_socket_from_timer(struct sock *sk) |
| { |
| sock_hold(sk); |
| bh_lock_sock(sk); |
| __x25_destroy_socket(sk); |
| bh_unlock_sock(sk); |
| sock_put(sk); |
| } |
| |
| /* |
| * Handling for system calls applied via the various interfaces to a |
| * X.25 socket object. |
| */ |
| |
| static int x25_setsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| int opt; |
| struct sock *sk = sock->sk; |
| int rc = -ENOPROTOOPT; |
| |
| if (level != SOL_X25 || optname != X25_QBITINCL) |
| goto out; |
| |
| rc = -EINVAL; |
| if (optlen < sizeof(int)) |
| goto out; |
| |
| rc = -EFAULT; |
| if (get_user(opt, (int __user *)optval)) |
| goto out; |
| |
| if (opt) |
| set_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); |
| else |
| clear_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); |
| rc = 0; |
| out: |
| return rc; |
| } |
| |
| static int x25_getsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| struct sock *sk = sock->sk; |
| int val, len, rc = -ENOPROTOOPT; |
| |
| if (level != SOL_X25 || optname != X25_QBITINCL) |
| goto out; |
| |
| rc = -EFAULT; |
| if (get_user(len, optlen)) |
| goto out; |
| |
| len = min_t(unsigned int, len, sizeof(int)); |
| |
| rc = -EINVAL; |
| if (len < 0) |
| goto out; |
| |
| rc = -EFAULT; |
| if (put_user(len, optlen)) |
| goto out; |
| |
| val = test_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); |
| rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; |
| out: |
| return rc; |
| } |
| |
| static int x25_listen(struct socket *sock, int backlog) |
| { |
| struct sock *sk = sock->sk; |
| int rc = -EOPNOTSUPP; |
| |
| lock_sock(sk); |
| if (sk->sk_state != TCP_LISTEN) { |
| memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); |
| sk->sk_max_ack_backlog = backlog; |
| sk->sk_state = TCP_LISTEN; |
| rc = 0; |
| } |
| release_sock(sk); |
| |
| return rc; |
| } |
| |
| static struct proto x25_proto = { |
| .name = "X25", |
| .owner = THIS_MODULE, |
| .obj_size = sizeof(struct x25_sock), |
| }; |
| |
| static struct sock *x25_alloc_socket(struct net *net, int kern) |
| { |
| struct x25_sock *x25; |
| struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto, kern); |
| |
| if (!sk) |
| goto out; |
| |
| sock_init_data(NULL, sk); |
| |
| x25 = x25_sk(sk); |
| skb_queue_head_init(&x25->ack_queue); |
| skb_queue_head_init(&x25->fragment_queue); |
| skb_queue_head_init(&x25->interrupt_in_queue); |
| skb_queue_head_init(&x25->interrupt_out_queue); |
| out: |
| return sk; |
| } |
| |
| static int x25_create(struct net *net, struct socket *sock, int protocol, |
| int kern) |
| { |
| struct sock *sk; |
| struct x25_sock *x25; |
| int rc = -EAFNOSUPPORT; |
| |
| if (!net_eq(net, &init_net)) |
| goto out; |
| |
| rc = -ESOCKTNOSUPPORT; |
| if (sock->type != SOCK_SEQPACKET) |
| goto out; |
| |
| rc = -EINVAL; |
| if (protocol) |
| goto out; |
| |
| rc = -ENOBUFS; |
| if ((sk = x25_alloc_socket(net, kern)) == NULL) |
| goto out; |
| |
| x25 = x25_sk(sk); |
| |
| sock_init_data(sock, sk); |
| |
| x25_init_timers(sk); |
| |
| sock->ops = &x25_proto_ops; |
| sk->sk_protocol = protocol; |
| sk->sk_backlog_rcv = x25_backlog_rcv; |
| |
| x25->t21 = sysctl_x25_call_request_timeout; |
| x25->t22 = sysctl_x25_reset_request_timeout; |
| x25->t23 = sysctl_x25_clear_request_timeout; |
| x25->t2 = sysctl_x25_ack_holdback_timeout; |
| x25->state = X25_STATE_0; |
| x25->cudmatchlength = 0; |
| set_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); /* normally no cud */ |
| /* on call accept */ |
| |
| x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE; |
| x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE; |
| x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE; |
| x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE; |
| x25->facilities.throughput = 0; /* by default don't negotiate |
| throughput */ |
| x25->facilities.reverse = X25_DEFAULT_REVERSE; |
| x25->dte_facilities.calling_len = 0; |
| x25->dte_facilities.called_len = 0; |
| memset(x25->dte_facilities.called_ae, '\0', |
| sizeof(x25->dte_facilities.called_ae)); |
| memset(x25->dte_facilities.calling_ae, '\0', |
| sizeof(x25->dte_facilities.calling_ae)); |
| |
| rc = 0; |
| out: |
| return rc; |
| } |
| |
| static struct sock *x25_make_new(struct sock *osk) |
| { |
| struct sock *sk = NULL; |
| struct x25_sock *x25, *ox25; |
| |
| if (osk->sk_type != SOCK_SEQPACKET) |
| goto out; |
| |
| if ((sk = x25_alloc_socket(sock_net(osk), 0)) == NULL) |
| goto out; |
| |
| x25 = x25_sk(sk); |
| |
| sk->sk_type = osk->sk_type; |
| sk->sk_priority = osk->sk_priority; |
| sk->sk_protocol = osk->sk_protocol; |
| sk->sk_rcvbuf = osk->sk_rcvbuf; |
| sk->sk_sndbuf = osk->sk_sndbuf; |
| sk->sk_state = TCP_ESTABLISHED; |
| sk->sk_backlog_rcv = osk->sk_backlog_rcv; |
| sock_copy_flags(sk, osk); |
| |
| ox25 = x25_sk(osk); |
| x25->t21 = ox25->t21; |
| x25->t22 = ox25->t22; |
| x25->t23 = ox25->t23; |
| x25->t2 = ox25->t2; |
| x25->flags = ox25->flags; |
| x25->facilities = ox25->facilities; |
| x25->dte_facilities = ox25->dte_facilities; |
| x25->cudmatchlength = ox25->cudmatchlength; |
| |
| clear_bit(X25_INTERRUPT_FLAG, &x25->flags); |
| x25_init_timers(sk); |
| out: |
| return sk; |
| } |
| |
| static int x25_release(struct socket *sock) |
| { |
| struct sock *sk = sock->sk; |
| struct x25_sock *x25; |
| |
| if (!sk) |
| return 0; |
| |
| x25 = x25_sk(sk); |
| |
| sock_hold(sk); |
| lock_sock(sk); |
| switch (x25->state) { |
| |
| case X25_STATE_0: |
| case X25_STATE_2: |
| x25_disconnect(sk, 0, 0, 0); |
| __x25_destroy_socket(sk); |
| goto out; |
| |
| case X25_STATE_1: |
| case X25_STATE_3: |
| case X25_STATE_4: |
| x25_clear_queues(sk); |
| x25_write_internal(sk, X25_CLEAR_REQUEST); |
| x25_start_t23timer(sk); |
| x25->state = X25_STATE_2; |
| sk->sk_state = TCP_CLOSE; |
| sk->sk_shutdown |= SEND_SHUTDOWN; |
| sk->sk_state_change(sk); |
| sock_set_flag(sk, SOCK_DEAD); |
| sock_set_flag(sk, SOCK_DESTROY); |
| break; |
| } |
| |
| sock_orphan(sk); |
| out: |
| release_sock(sk); |
| sock_put(sk); |
| return 0; |
| } |
| |
| static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| { |
| struct sock *sk = sock->sk; |
| struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; |
| int len, i, rc = 0; |
| |
| if (!sock_flag(sk, SOCK_ZAPPED) || |
| addr_len != sizeof(struct sockaddr_x25) || |
| addr->sx25_family != AF_X25) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| len = strlen(addr->sx25_addr.x25_addr); |
| for (i = 0; i < len; i++) { |
| if (!isdigit(addr->sx25_addr.x25_addr[i])) { |
| rc = -EINVAL; |
| goto out; |
| } |
| } |
| |
| lock_sock(sk); |
| x25_sk(sk)->source_addr = addr->sx25_addr; |
| x25_insert_socket(sk); |
| sock_reset_flag(sk, SOCK_ZAPPED); |
| release_sock(sk); |
| SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); |
| out: |
| return rc; |
| } |
| |
| static int x25_wait_for_connection_establishment(struct sock *sk) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| int rc; |
| |
| add_wait_queue_exclusive(sk_sleep(sk), &wait); |
| for (;;) { |
| __set_current_state(TASK_INTERRUPTIBLE); |
| rc = -ERESTARTSYS; |
| if (signal_pending(current)) |
| break; |
| rc = sock_error(sk); |
| if (rc) { |
| sk->sk_socket->state = SS_UNCONNECTED; |
| break; |
| } |
| rc = 0; |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| release_sock(sk); |
| schedule(); |
| lock_sock(sk); |
| } else |
| break; |
| } |
| __set_current_state(TASK_RUNNING); |
| remove_wait_queue(sk_sleep(sk), &wait); |
| return rc; |
| } |
| |
| static int x25_connect(struct socket *sock, struct sockaddr *uaddr, |
| int addr_len, int flags) |
| { |
| struct sock *sk = sock->sk; |
| struct x25_sock *x25 = x25_sk(sk); |
| struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; |
| struct x25_route *rt; |
| int rc = 0; |
| |
| lock_sock(sk); |
| if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { |
| sock->state = SS_CONNECTED; |
| goto out; /* Connect completed during a ERESTARTSYS event */ |
| } |
| |
| rc = -ECONNREFUSED; |
| if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { |
| sock->state = SS_UNCONNECTED; |
| goto out; |
| } |
| |
| rc = -EISCONN; /* No reconnect on a seqpacket socket */ |
| if (sk->sk_state == TCP_ESTABLISHED) |
| goto out; |
| |
| sk->sk_state = TCP_CLOSE; |
| sock->state = SS_UNCONNECTED; |
| |
| rc = -EINVAL; |
| if (addr_len != sizeof(struct sockaddr_x25) || |
| addr->sx25_family != AF_X25) |
| goto out; |
| |
| rc = -ENETUNREACH; |
| rt = x25_get_route(&addr->sx25_addr); |
| if (!rt) |
| goto out; |
| |
| x25->neighbour = x25_get_neigh(rt->dev); |
| if (!x25->neighbour) |
| goto out_put_route; |
| |
| x25_limit_facilities(&x25->facilities, x25->neighbour); |
| |
| x25->lci = x25_new_lci(x25->neighbour); |
| if (!x25->lci) |
| goto out_put_neigh; |
| |
| rc = -EINVAL; |
| if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */ |
| goto out_put_neigh; |
| |
| if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr)) |
| memset(&x25->source_addr, '\0', X25_ADDR_LEN); |
| |
| x25->dest_addr = addr->sx25_addr; |
| |
| /* Move to connecting socket, start sending Connect Requests */ |
| sock->state = SS_CONNECTING; |
| sk->sk_state = TCP_SYN_SENT; |
| |
| x25->state = X25_STATE_1; |
| |
| x25_write_internal(sk, X25_CALL_REQUEST); |
| |
| x25_start_heartbeat(sk); |
| x25_start_t21timer(sk); |
| |
| /* Now the loop */ |
| rc = -EINPROGRESS; |
| if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) |
| goto out_put_neigh; |
| |
| rc = x25_wait_for_connection_establishment(sk); |
| if (rc) |
| goto out_put_neigh; |
| |
| sock->state = SS_CONNECTED; |
| rc = 0; |
| out_put_neigh: |
| if (rc) |
| x25_neigh_put(x25->neighbour); |
| out_put_route: |
| x25_route_put(rt); |
| out: |
| release_sock(sk); |
| return rc; |
| } |
| |
| static int x25_wait_for_data(struct sock *sk, long timeout) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| int rc = 0; |
| |
| add_wait_queue_exclusive(sk_sleep(sk), &wait); |
| for (;;) { |
| __set_current_state(TASK_INTERRUPTIBLE); |
| if (sk->sk_shutdown & RCV_SHUTDOWN) |
| break; |
| rc = -ERESTARTSYS; |
| if (signal_pending(current)) |
| break; |
| rc = -EAGAIN; |
| if (!timeout) |
| break; |
| rc = 0; |
| if (skb_queue_empty(&sk->sk_receive_queue)) { |
| release_sock(sk); |
| timeout = schedule_timeout(timeout); |
| lock_sock(sk); |
| } else |
| break; |
| } |
| __set_current_state(TASK_RUNNING); |
| remove_wait_queue(sk_sleep(sk), &wait); |
| return rc; |
| } |
| |
| static int x25_accept(struct socket *sock, struct socket *newsock, int flags, |
| bool kern) |
| { |
| struct sock *sk = sock->sk; |
| struct sock *newsk; |
| struct sk_buff *skb; |
| int rc = -EINVAL; |
| |
| if (!sk) |
| goto out; |
| |
| rc = -EOPNOTSUPP; |
| if (sk->sk_type != SOCK_SEQPACKET) |
| goto out; |
| |
| lock_sock(sk); |
| rc = -EINVAL; |
| if (sk->sk_state != TCP_LISTEN) |
| goto out2; |
| |
| rc = x25_wait_for_data(sk, sk->sk_rcvtimeo); |
| if (rc) |
| goto out2; |
| skb = skb_dequeue(&sk->sk_receive_queue); |
| rc = -EINVAL; |
| if (!skb->sk) |
| goto out2; |
| newsk = skb->sk; |
| sock_graft(newsk, newsock); |
| |
| /* Now attach up the new socket */ |
| skb->sk = NULL; |
| kfree_skb(skb); |
| sk->sk_ack_backlog--; |
| newsock->state = SS_CONNECTED; |
| rc = 0; |
| out2: |
| release_sock(sk); |
| out: |
| return rc; |
| } |
| |
| static int x25_getname(struct socket *sock, struct sockaddr *uaddr, |
| int peer) |
| { |
| struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; |
| struct sock *sk = sock->sk; |
| struct x25_sock *x25 = x25_sk(sk); |
| int rc = 0; |
| |
| if (peer) { |
| if (sk->sk_state != TCP_ESTABLISHED) { |
| rc = -ENOTCONN; |
| goto out; |
| } |
| sx25->sx25_addr = x25->dest_addr; |
| } else |
| sx25->sx25_addr = x25->source_addr; |
| |
| sx25->sx25_family = AF_X25; |
| rc = sizeof(*sx25); |
| |
| out: |
| return rc; |
| } |
| |
| int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, |
| unsigned int lci) |
| { |
| struct sock *sk; |
| struct sock *make; |
| struct x25_sock *makex25; |
| struct x25_address source_addr, dest_addr; |
| struct x25_facilities facilities; |
| struct x25_dte_facilities dte_facilities; |
| int len, addr_len, rc; |
| |
| /* |
| * Remove the LCI and frame type. |
| */ |
| skb_pull(skb, X25_STD_MIN_LEN); |
| |
| /* |
| * Extract the X.25 addresses and convert them to ASCII strings, |
| * and remove them. |
| * |
| * Address block is mandatory in call request packets |
| */ |
| addr_len = x25_parse_address_block(skb, &source_addr, &dest_addr); |
| if (addr_len <= 0) |
| goto out_clear_request; |
| skb_pull(skb, addr_len); |
| |
| /* |
| * Get the length of the facilities, skip past them for the moment |
| * get the call user data because this is needed to determine |
| * the correct listener |
| * |
| * Facilities length is mandatory in call request packets |
| */ |
| if (!pskb_may_pull(skb, 1)) |
| goto out_clear_request; |
| len = skb->data[0] + 1; |
| if (!pskb_may_pull(skb, len)) |
| goto out_clear_request; |
| skb_pull(skb,len); |
| |
| /* |
| * Ensure that the amount of call user data is valid. |
| */ |
| if (skb->len > X25_MAX_CUD_LEN) |
| goto out_clear_request; |
| |
| /* |
| * Get all the call user data so it can be used in |
| * x25_find_listener and skb_copy_from_linear_data up ahead. |
| */ |
| if (!pskb_may_pull(skb, skb->len)) |
| goto out_clear_request; |
| |
| /* |
| * Find a listener for the particular address/cud pair. |
| */ |
| sk = x25_find_listener(&source_addr,skb); |
| skb_push(skb,len); |
| |
| if (sk != NULL && sk_acceptq_is_full(sk)) { |
| goto out_sock_put; |
| } |
| |
| /* |
| * We dont have any listeners for this incoming call. |
| * Try forwarding it. |
| */ |
| if (sk == NULL) { |
| skb_push(skb, addr_len + X25_STD_MIN_LEN); |
| if (sysctl_x25_forward && |
| x25_forward_call(&dest_addr, nb, skb, lci) > 0) |
| { |
| /* Call was forwarded, dont process it any more */ |
| kfree_skb(skb); |
| rc = 1; |
| goto out; |
| } else { |
| /* No listeners, can't forward, clear the call */ |
| goto out_clear_request; |
| } |
| } |
| |
| /* |
| * Try to reach a compromise on the requested facilities. |
| */ |
| len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities); |
| if (len == -1) |
| goto out_sock_put; |
| |
| /* |
| * current neighbour/link might impose additional limits |
| * on certain facilties |
| */ |
| |
| x25_limit_facilities(&facilities, nb); |
| |
| /* |
| * Try to create a new socket. |
| */ |
| make = x25_make_new(sk); |
| if (!make) |
| goto out_sock_put; |
| |
| /* |
| * Remove the facilities |
| */ |
| skb_pull(skb, len); |
| |
| skb->sk = make; |
| make->sk_state = TCP_ESTABLISHED; |
| |
| makex25 = x25_sk(make); |
| makex25->lci = lci; |
| makex25->dest_addr = dest_addr; |
| makex25->source_addr = source_addr; |
| makex25->neighbour = nb; |
| makex25->facilities = facilities; |
| makex25->dte_facilities= dte_facilities; |
| makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask; |
| /* ensure no reverse facil on accept */ |
| makex25->vc_facil_mask &= ~X25_MASK_REVERSE; |
| /* ensure no calling address extension on accept */ |
| makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE; |
| makex25->cudmatchlength = x25_sk(sk)->cudmatchlength; |
| |
| /* Normally all calls are accepted immediately */ |
| if (test_bit(X25_ACCPT_APPRV_FLAG, &makex25->flags)) { |
| x25_write_internal(make, X25_CALL_ACCEPTED); |
| makex25->state = X25_STATE_3; |
| } |
| |
| /* |
| * Incoming Call User Data. |
| */ |
| skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len); |
| makex25->calluserdata.cudlength = skb->len; |
| |
| sk->sk_ack_backlog++; |
| |
| x25_insert_socket(make); |
| |
| skb_queue_head(&sk->sk_receive_queue, skb); |
| |
| x25_start_heartbeat(make); |
| |
| if (!sock_flag(sk, SOCK_DEAD)) |
| sk->sk_data_ready(sk); |
| rc = 1; |
| sock_put(sk); |
| out: |
| return rc; |
| out_sock_put: |
| sock_put(sk); |
| out_clear_request: |
| rc = 0; |
| x25_transmit_clear_request(nb, lci, 0x01); |
| goto out; |
| } |
| |
| static int x25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
| { |
| struct sock *sk = sock->sk; |
| struct x25_sock *x25 = x25_sk(sk); |
| DECLARE_SOCKADDR(struct sockaddr_x25 *, usx25, msg->msg_name); |
| struct sockaddr_x25 sx25; |
| struct sk_buff *skb; |
| unsigned char *asmptr; |
| int noblock = msg->msg_flags & MSG_DONTWAIT; |
| size_t size; |
| int qbit = 0, rc = -EINVAL; |
| |
| lock_sock(sk); |
| if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) |
| goto out; |
| |
| /* we currently don't support segmented records at the user interface */ |
| if (!(msg->msg_flags & (MSG_EOR|MSG_OOB))) |
| goto out; |
| |
| rc = -EADDRNOTAVAIL; |
| if (sock_flag(sk, SOCK_ZAPPED)) |
| goto out; |
| |
| rc = -EPIPE; |
| if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| send_sig(SIGPIPE, current, 0); |
| goto out; |
| } |
| |
| rc = -ENETUNREACH; |
| if (!x25->neighbour) |
| goto out; |
| |
| if (usx25) { |
| rc = -EINVAL; |
| if (msg->msg_namelen < sizeof(sx25)) |
| goto out; |
| memcpy(&sx25, usx25, sizeof(sx25)); |
| rc = -EISCONN; |
| if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr)) |
| goto out; |
| rc = -EINVAL; |
| if (sx25.sx25_family != AF_X25) |
| goto out; |
| } else { |
| /* |
| * FIXME 1003.1g - if the socket is like this because |
| * it has become closed (not started closed) we ought |
| * to SIGPIPE, EPIPE; |
| */ |
| rc = -ENOTCONN; |
| if (sk->sk_state != TCP_ESTABLISHED) |
| goto out; |
| |
| sx25.sx25_family = AF_X25; |
| sx25.sx25_addr = x25->dest_addr; |
| } |
| |
| /* Sanity check the packet size */ |
| if (len > 65535) { |
| rc = -EMSGSIZE; |
| goto out; |
| } |
| |
| SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n"); |
| |
| /* Build a packet */ |
| SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n"); |
| |
| if ((msg->msg_flags & MSG_OOB) && len > 32) |
| len = 32; |
| |
| size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN; |
| |
| release_sock(sk); |
| skb = sock_alloc_send_skb(sk, size, noblock, &rc); |
| lock_sock(sk); |
| if (!skb) |
| goto out; |
| X25_SKB_CB(skb)->flags = msg->msg_flags; |
| |
| skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN); |
| |
| /* |
| * Put the data on the end |
| */ |
| SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n"); |
| |
| skb_reset_transport_header(skb); |
| skb_put(skb, len); |
| |
| rc = memcpy_from_msg(skb_transport_header(skb), msg, len); |
| if (rc) |
| goto out_kfree_skb; |
| |
| /* |
| * If the Q BIT Include socket option is in force, the first |
| * byte of the user data is the logical value of the Q Bit. |
| */ |
| if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
| if (!pskb_may_pull(skb, 1)) |
| goto out_kfree_skb; |
| |
| qbit = skb->data[0]; |
| skb_pull(skb, 1); |
| } |
| |
| /* |
| * Push down the X.25 header |
| */ |
| SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n"); |
| |
| if (msg->msg_flags & MSG_OOB) { |
| if (x25->neighbour->extended) { |
| asmptr = skb_push(skb, X25_STD_MIN_LEN); |
| *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; |
| *asmptr++ = (x25->lci >> 0) & 0xFF; |
| *asmptr++ = X25_INTERRUPT; |
| } else { |
| asmptr = skb_push(skb, X25_STD_MIN_LEN); |
| *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; |
| *asmptr++ = (x25->lci >> 0) & 0xFF; |
| *asmptr++ = X25_INTERRUPT; |
| } |
| } else { |
| if (x25->neighbour->extended) { |
| /* Build an Extended X.25 header */ |
| asmptr = skb_push(skb, X25_EXT_MIN_LEN); |
| *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; |
| *asmptr++ = (x25->lci >> 0) & 0xFF; |
| *asmptr++ = X25_DATA; |
| *asmptr++ = X25_DATA; |
| } else { |
| /* Build an Standard X.25 header */ |
| asmptr = skb_push(skb, X25_STD_MIN_LEN); |
| *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; |
| *asmptr++ = (x25->lci >> 0) & 0xFF; |
| *asmptr++ = X25_DATA; |
| } |
| |
| if (qbit) |
| skb->data[0] |= X25_Q_BIT; |
| } |
| |
| SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n"); |
| SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n"); |
| |
| rc = -ENOTCONN; |
| if (sk->sk_state != TCP_ESTABLISHED) |
| goto out_kfree_skb; |
| |
| if (msg->msg_flags & MSG_OOB) |
| skb_queue_tail(&x25->interrupt_out_queue, skb); |
| else { |
| rc = x25_output(sk, skb); |
| len = rc; |
| if (rc < 0) |
| kfree_skb(skb); |
| else if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) |
| len++; |
| } |
| |
| x25_kick(sk); |
| rc = len; |
| out: |
| release_sock(sk); |
| return rc; |
| out_kfree_skb: |
| kfree_skb(skb); |
| goto out; |
| } |
| |
| |
| static int x25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
| int flags) |
| { |
| struct sock *sk = sock->sk; |
| struct x25_sock *x25 = x25_sk(sk); |
| DECLARE_SOCKADDR(struct sockaddr_x25 *, sx25, msg->msg_name); |
| size_t copied; |
| int qbit, header_len; |
| struct sk_buff *skb; |
| unsigned char *asmptr; |
| int rc = -ENOTCONN; |
| |
| lock_sock(sk); |
| |
| if (x25->neighbour == NULL) |
| goto out; |
| |
| header_len = x25->neighbour->extended ? |
| X25_EXT_MIN_LEN : X25_STD_MIN_LEN; |
| |
| /* |
| * This works for seqpacket too. The receiver has ordered the queue for |
| * us! We do one quick check first though |
| */ |
| if (sk->sk_state != TCP_ESTABLISHED) |
| goto out; |
| |
| if (flags & MSG_OOB) { |
| rc = -EINVAL; |
| if (sock_flag(sk, SOCK_URGINLINE) || |
| !skb_peek(&x25->interrupt_in_queue)) |
| goto out; |
| |
| skb = skb_dequeue(&x25->interrupt_in_queue); |
| |
| if (!pskb_may_pull(skb, X25_STD_MIN_LEN)) |
| goto out_free_dgram; |
| |
| skb_pull(skb, X25_STD_MIN_LEN); |
| |
| /* |
| * No Q bit information on Interrupt data. |
| */ |
| if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
| asmptr = skb_push(skb, 1); |
| *asmptr = 0x00; |
| } |
| |
| msg->msg_flags |= MSG_OOB; |
| } else { |
| /* Now we can treat all alike */ |
| release_sock(sk); |
| skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
| flags & MSG_DONTWAIT, &rc); |
| lock_sock(sk); |
| if (!skb) |
| goto out; |
| |
| if (!pskb_may_pull(skb, header_len)) |
| goto out_free_dgram; |
| |
| qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT; |
| |
| skb_pull(skb, header_len); |
| |
| if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
| asmptr = skb_push(skb, 1); |
| *asmptr = qbit; |
| } |
| } |
| |
| skb_reset_transport_header(skb); |
| copied = skb->len; |
| |
| if (copied > size) { |
| copied = size; |
| msg->msg_flags |= MSG_TRUNC; |
| } |
| |
| /* Currently, each datagram always contains a complete record */ |
| msg->msg_flags |= MSG_EOR; |
| |
| rc = skb_copy_datagram_msg(skb, 0, msg, copied); |
| if (rc) |
| goto out_free_dgram; |
| |
| if (sx25) { |
| sx25->sx25_family = AF_X25; |
| sx25->sx25_addr = x25->dest_addr; |
| msg->msg_namelen = sizeof(*sx25); |
| } |
| |
| x25_check_rbuf(sk); |
| rc = copied; |
| out_free_dgram: |
| skb_free_datagram(sk, skb); |
| out: |
| release_sock(sk); |
| return rc; |
| } |
| |
| |
| static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| { |
| struct sock *sk = sock->sk; |
| struct x25_sock *x25 = x25_sk(sk); |
| void __user *argp = (void __user *)arg; |
| int rc; |
| |
| switch (cmd) { |
| case TIOCOUTQ: { |
| int amount; |
| |
| amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
| if (amount < 0) |
| amount = 0; |
| rc = put_user(amount, (unsigned int __user *)argp); |
| break; |
| } |
| |
| case TIOCINQ: { |
| struct sk_buff *skb; |
| int amount = 0; |
| /* |
| * These two are safe on a single CPU system as |
| * only user tasks fiddle here |
| */ |
| lock_sock(sk); |
| if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
| amount = skb->len; |
| release_sock(sk); |
| rc = put_user(amount, (unsigned int __user *)argp); |
| break; |
| } |
| |
| case SIOCGSTAMP: |
| rc = -EINVAL; |
| if (sk) |
| rc = sock_get_timestamp(sk, |
| (struct timeval __user *)argp); |
| break; |
| case SIOCGSTAMPNS: |
| rc = -EINVAL; |
| if (sk) |
| rc = sock_get_timestampns(sk, |
| (struct timespec __user *)argp); |
| break; |
| case SIOCGIFADDR: |
| case SIOCSIFADDR: |
| case SIOCGIFDSTADDR: |
| case SIOCSIFDSTADDR: |
| case SIOCGIFBRDADDR: |
| case SIOCSIFBRDADDR: |
| case SIOCGIFNETMASK: |
| case SIOCSIFNETMASK: |
| case SIOCGIFMETRIC: |
| case SIOCSIFMETRIC: |
| rc = -EINVAL; |
| break; |
| case SIOCADDRT: |
| case SIOCDELRT: |
| rc = -EPERM; |
| if (!capable(CAP_NET_ADMIN)) |
| break; |
| rc = x25_route_ioctl(cmd, argp); |
| break; |
| case SIOCX25GSUBSCRIP: |
| rc = x25_subscr_ioctl(cmd, argp); |
| break; |
| case SIOCX25SSUBSCRIP: |
| rc = -EPERM; |
| if (!capable(CAP_NET_ADMIN)) |
| break; |
| rc = x25_subscr_ioctl(cmd, argp); |
| break; |
| case SIOCX25GFACILITIES: { |
| lock_sock(sk); |
| rc = copy_to_user(argp, &x25->facilities, |
| sizeof(x25->facilities)) |
| ? -EFAULT : 0; |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25SFACILITIES: { |
| struct x25_facilities facilities; |
| rc = -EFAULT; |
| if (copy_from_user(&facilities, argp, sizeof(facilities))) |
| break; |
| rc = -EINVAL; |
| lock_sock(sk); |
| if (sk->sk_state != TCP_LISTEN && |
| sk->sk_state != TCP_CLOSE) |
| goto out_fac_release; |
| if (facilities.pacsize_in < X25_PS16 || |
| facilities.pacsize_in > X25_PS4096) |
| goto out_fac_release; |
| if (facilities.pacsize_out < X25_PS16 || |
| facilities.pacsize_out > X25_PS4096) |
| goto out_fac_release; |
| if (facilities.winsize_in < 1 || |
| facilities.winsize_in > 127) |
| goto out_fac_release; |
| if (facilities.throughput) { |
| int out = facilities.throughput & 0xf0; |
| int in = facilities.throughput & 0x0f; |
| if (!out) |
| facilities.throughput |= |
| X25_DEFAULT_THROUGHPUT << 4; |
| else if (out < 0x30 || out > 0xD0) |
| goto out_fac_release; |
| if (!in) |
| facilities.throughput |= |
| X25_DEFAULT_THROUGHPUT; |
| else if (in < 0x03 || in > 0x0D) |
| goto out_fac_release; |
| } |
| if (facilities.reverse && |
| (facilities.reverse & 0x81) != 0x81) |
| goto out_fac_release; |
| x25->facilities = facilities; |
| rc = 0; |
| out_fac_release: |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25GDTEFACILITIES: { |
| lock_sock(sk); |
| rc = copy_to_user(argp, &x25->dte_facilities, |
| sizeof(x25->dte_facilities)); |
| release_sock(sk); |
| if (rc) |
| rc = -EFAULT; |
| break; |
| } |
| |
| case SIOCX25SDTEFACILITIES: { |
| struct x25_dte_facilities dtefacs; |
| rc = -EFAULT; |
| if (copy_from_user(&dtefacs, argp, sizeof(dtefacs))) |
| break; |
| rc = -EINVAL; |
| lock_sock(sk); |
| if (sk->sk_state != TCP_LISTEN && |
| sk->sk_state != TCP_CLOSE) |
| goto out_dtefac_release; |
| if (dtefacs.calling_len > X25_MAX_AE_LEN) |
| goto out_dtefac_release; |
| if (dtefacs.called_len > X25_MAX_AE_LEN) |
| goto out_dtefac_release; |
| x25->dte_facilities = dtefacs; |
| rc = 0; |
| out_dtefac_release: |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25GCALLUSERDATA: { |
| lock_sock(sk); |
| rc = copy_to_user(argp, &x25->calluserdata, |
| sizeof(x25->calluserdata)) |
| ? -EFAULT : 0; |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25SCALLUSERDATA: { |
| struct x25_calluserdata calluserdata; |
| |
| rc = -EFAULT; |
| if (copy_from_user(&calluserdata, argp, sizeof(calluserdata))) |
| break; |
| rc = -EINVAL; |
| if (calluserdata.cudlength > X25_MAX_CUD_LEN) |
| break; |
| lock_sock(sk); |
| x25->calluserdata = calluserdata; |
| release_sock(sk); |
| rc = 0; |
| break; |
| } |
| |
| case SIOCX25GCAUSEDIAG: { |
| lock_sock(sk); |
| rc = copy_to_user(argp, &x25->causediag, sizeof(x25->causediag)) |
| ? -EFAULT : 0; |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25SCAUSEDIAG: { |
| struct x25_causediag causediag; |
| rc = -EFAULT; |
| if (copy_from_user(&causediag, argp, sizeof(causediag))) |
| break; |
| lock_sock(sk); |
| x25->causediag = causediag; |
| release_sock(sk); |
| rc = 0; |
| break; |
| |
| } |
| |
| case SIOCX25SCUDMATCHLEN: { |
| struct x25_subaddr sub_addr; |
| rc = -EINVAL; |
| lock_sock(sk); |
| if(sk->sk_state != TCP_CLOSE) |
| goto out_cud_release; |
| rc = -EFAULT; |
| if (copy_from_user(&sub_addr, argp, |
| sizeof(sub_addr))) |
| goto out_cud_release; |
| rc = -EINVAL; |
| if (sub_addr.cudmatchlength > X25_MAX_CUD_LEN) |
| goto out_cud_release; |
| x25->cudmatchlength = sub_addr.cudmatchlength; |
| rc = 0; |
| out_cud_release: |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25CALLACCPTAPPRV: { |
| rc = -EINVAL; |
| lock_sock(sk); |
| if (sk->sk_state == TCP_CLOSE) { |
| clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); |
| rc = 0; |
| } |
| release_sock(sk); |
| break; |
| } |
| |
| case SIOCX25SENDCALLACCPT: { |
| rc = -EINVAL; |
| lock_sock(sk); |
| if (sk->sk_state != TCP_ESTABLISHED) |
| goto out_sendcallaccpt_release; |
| /* must call accptapprv above */ |
| if (test_bit(X25_ACCPT_APPRV_FLAG, &x25->flags)) |
| goto out_sendcallaccpt_release; |
| x25_write_internal(sk, X25_CALL_ACCEPTED); |
| x25->state = X25_STATE_3; |
| rc = 0; |
| out_sendcallaccpt_release: |
| release_sock(sk); |
| break; |
| } |
| |
| default: |
| rc = -ENOIOCTLCMD; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static const struct net_proto_family x25_family_ops = { |
| .family = AF_X25, |
| .create = x25_create, |
| .owner = THIS_MODULE, |
| }; |
| |
| #ifdef CONFIG_COMPAT |
| static int compat_x25_subscr_ioctl(unsigned int cmd, |
| struct compat_x25_subscrip_struct __user *x25_subscr32) |
| { |
| struct compat_x25_subscrip_struct x25_subscr; |
| struct x25_neigh *nb; |
| struct net_device *dev; |
| int rc = -EINVAL; |
| |
| rc = -EFAULT; |
| if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32))) |
| goto out; |
| |
| rc = -EINVAL; |
| dev = x25_dev_get(x25_subscr.device); |
| if (dev == NULL) |
| goto out; |
| |
| nb = x25_get_neigh(dev); |
| if (nb == NULL) |
| goto out_dev_put; |
| |
| dev_put(dev); |
| |
| if (cmd == SIOCX25GSUBSCRIP) { |
| read_lock_bh(&x25_neigh_list_lock); |
| x25_subscr.extended = nb->extended; |
| x25_subscr.global_facil_mask = nb->global_facil_mask; |
| read_unlock_bh(&x25_neigh_list_lock); |
| rc = copy_to_user(x25_subscr32, &x25_subscr, |
| sizeof(*x25_subscr32)) ? -EFAULT : 0; |
| } else { |
| rc = -EINVAL; |
| if (x25_subscr.extended == 0 || x25_subscr.extended == 1) { |
| rc = 0; |
| write_lock_bh(&x25_neigh_list_lock); |
| nb->extended = x25_subscr.extended; |
| nb->global_facil_mask = x25_subscr.global_facil_mask; |
| write_unlock_bh(&x25_neigh_list_lock); |
| } |
| } |
| x25_neigh_put(nb); |
| out: |
| return rc; |
| out_dev_put: |
| dev_put(dev); |
| goto out; |
| } |
| |
| static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, |
| unsigned long arg) |
| { |
| void __user *argp = compat_ptr(arg); |
| struct sock *sk = sock->sk; |
| |
| int rc = -ENOIOCTLCMD; |
| |
| switch(cmd) { |
| case TIOCOUTQ: |
| case TIOCINQ: |
| rc = x25_ioctl(sock, cmd, (unsigned long)argp); |
| break; |
| case SIOCGSTAMP: |
| rc = -EINVAL; |
| if (sk) |
| rc = compat_sock_get_timestamp(sk, |
| (struct timeval __user*)argp); |
| break; |
| case SIOCGSTAMPNS: |
| rc = -EINVAL; |
| if (sk) |
| rc = compat_sock_get_timestampns(sk, |
| (struct timespec __user*)argp); |
| break; |
| case SIOCGIFADDR: |
| case SIOCSIFADDR: |
| case SIOCGIFDSTADDR: |
| case SIOCSIFDSTADDR: |
| case SIOCGIFBRDADDR: |
| case SIOCSIFBRDADDR: |
| case SIOCGIFNETMASK: |
| case SIOCSIFNETMASK: |
| case SIOCGIFMETRIC: |
| case SIOCSIFMETRIC: |
| rc = -EINVAL; |
| break; |
| case SIOCADDRT: |
| case SIOCDELRT: |
| rc = -EPERM; |
| if (!capable(CAP_NET_ADMIN)) |
| break; |
| rc = x25_route_ioctl(cmd, argp); |
| break; |
| case SIOCX25GSUBSCRIP: |
| rc = compat_x25_subscr_ioctl(cmd, argp); |
| break; |
| case SIOCX25SSUBSCRIP: |
| rc = -EPERM; |
| if (!capable(CAP_NET_ADMIN)) |
| break; |
| rc = compat_x25_subscr_ioctl(cmd, argp); |
| break; |
| case SIOCX25GFACILITIES: |
| case SIOCX25SFACILITIES: |
| case SIOCX25GDTEFACILITIES: |
| case SIOCX25SDTEFACILITIES: |
| case SIOCX25GCALLUSERDATA: |
| case SIOCX25SCALLUSERDATA: |
| case SIOCX25GCAUSEDIAG: |
| case SIOCX25SCAUSEDIAG: |
| case SIOCX25SCUDMATCHLEN: |
| case SIOCX25CALLACCPTAPPRV: |
| case SIOCX25SENDCALLACCPT: |
| rc = x25_ioctl(sock, cmd, (unsigned long)argp); |
| break; |
| default: |
| rc = -ENOIOCTLCMD; |
| break; |
| } |
| return rc; |
| } |
| #endif |
| |
| static const struct proto_ops x25_proto_ops = { |
| .family = AF_X25, |
| .owner = THIS_MODULE, |
| .release = x25_release, |
| .bind = x25_bind, |
| .connect = x25_connect, |
| .socketpair = sock_no_socketpair, |
| .accept = x25_accept, |
| .getname = x25_getname, |
| .poll = datagram_poll, |
| .ioctl = x25_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = compat_x25_ioctl, |
| #endif |
| .listen = x25_listen, |
| .shutdown = sock_no_shutdown, |
| .setsockopt = x25_setsockopt, |
| .getsockopt = x25_getsockopt, |
| .sendmsg = x25_sendmsg, |
| .recvmsg = x25_recvmsg, |
| .mmap = sock_no_mmap, |
| .sendpage = sock_no_sendpage, |
| }; |
| |
| static struct packet_type x25_packet_type __read_mostly = { |
| .type = cpu_to_be16(ETH_P_X25), |
| .func = x25_lapb_receive_frame, |
| }; |
| |
| static struct notifier_block x25_dev_notifier = { |
| .notifier_call = x25_device_event, |
| }; |
| |
| void x25_kill_by_neigh(struct x25_neigh *nb) |
| { |
| struct sock *s; |
| |
| write_lock_bh(&x25_list_lock); |
| |
| sk_for_each(s, &x25_list) |
| if (x25_sk(s)->neighbour == nb) |
| x25_disconnect(s, ENETUNREACH, 0, 0); |
| |
| write_unlock_bh(&x25_list_lock); |
| |
| /* Remove any related forwards */ |
| x25_clear_forward_by_dev(nb->dev); |
| } |
| |
| static int __init x25_init(void) |
| { |
| int rc; |
| |
| rc = proto_register(&x25_proto, 0); |
| if (rc) |
| goto out; |
| |
| rc = sock_register(&x25_family_ops); |
| if (rc) |
| goto out_proto; |
| |
| dev_add_pack(&x25_packet_type); |
| |
| rc = register_netdevice_notifier(&x25_dev_notifier); |
| if (rc) |
| goto out_sock; |
| |
| rc = x25_register_sysctl(); |
| if (rc) |
| goto out_dev; |
| |
| rc = x25_proc_init(); |
| if (rc) |
| goto out_sysctl; |
| |
| pr_info("Linux Version 0.2\n"); |
| |
| out: |
| return rc; |
| out_sysctl: |
| x25_unregister_sysctl(); |
| out_dev: |
| unregister_netdevice_notifier(&x25_dev_notifier); |
| out_sock: |
| dev_remove_pack(&x25_packet_type); |
| sock_unregister(AF_X25); |
| out_proto: |
| proto_unregister(&x25_proto); |
| goto out; |
| } |
| module_init(x25_init); |
| |
| static void __exit x25_exit(void) |
| { |
| x25_proc_exit(); |
| x25_link_free(); |
| x25_route_free(); |
| |
| x25_unregister_sysctl(); |
| |
| unregister_netdevice_notifier(&x25_dev_notifier); |
| |
| dev_remove_pack(&x25_packet_type); |
| |
| sock_unregister(AF_X25); |
| proto_unregister(&x25_proto); |
| } |
| module_exit(x25_exit); |
| |
| MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>"); |
| MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_NETPROTO(PF_X25); |