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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [ax25/] [af_ax25.c] - Rev 1765
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/* * AX.25 release 038 * * This code REQUIRES 2.1.15 or higher/ NET3.038 * * 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 * AX.25 006 Alan(GW4PTS) Nearly died of shock - it's working 8-) * AX.25 007 Alan(GW4PTS) Removed the silliest bugs * AX.25 008 Alan(GW4PTS) Cleaned up, fixed a few state machine problems, added callbacks * AX.25 009 Alan(GW4PTS) Emergency patch kit to fix memory corruption * AX.25 010 Alan(GW4PTS) Added RAW sockets/Digipeat. * AX.25 011 Alan(GW4PTS) RAW socket and datagram fixes (thanks) - Raw sendto now gets PID right * datagram sendto uses correct target address. * AX.25 012 Alan(GW4PTS) Correct incoming connection handling, send DM to failed connects. * Use skb->data not skb+1. Support sk->priority correctly. * Correct receive on SOCK_DGRAM. * AX.25 013 Alan(GW4PTS) Send DM to all unknown frames, missing initialiser fixed * Leave spare SSID bits set (DAMA etc) - thanks for bug report, * removed device registration (it's not used or needed). Clean up for * gcc 2.5.8. PID to AX25_P_ * AX.25 014 Alan(GW4PTS) Cleanup and NET3 merge * AX.25 015 Alan(GW4PTS) Internal test version. * AX.25 016 Alan(GW4PTS) Semi Internal version for PI card * work. * AX.25 017 Alan(GW4PTS) Fixed some small bugs reported by * G4KLX * AX.25 018 Alan(GW4PTS) Fixed a small error in SOCK_DGRAM * AX.25 019 Alan(GW4PTS) Clean ups for the non INET kernel and device ioctls in AX.25 * AX.25 020 Jonathan(G4KLX) /proc support and other changes. * AX.25 021 Alan(GW4PTS) Added AX25_T1, AX25_N2, AX25_T3 as requested. * AX.25 022 Jonathan(G4KLX) More work on the ax25 auto router and /proc improved (again)! * Alan(GW4PTS) Added TIOCINQ/OUTQ * AX.25 023 Alan(GW4PTS) Fixed shutdown bug * AX.25 023 Alan(GW4PTS) Linus changed timers * AX.25 024 Alan(GW4PTS) Small bug fixes * AX.25 025 Alan(GW4PTS) More fixes, Linux 1.1.51 compatibility stuff, timers again! * AX.25 026 Alan(GW4PTS) Small state fix. * AX.25 027 Alan(GW4PTS) Socket close crash fixes. * AX.25 028 Alan(GW4PTS) Callsign control including settings per uid. * Small bug fixes. * Protocol set by sockets only. * Small changes to allow for start of NET/ROM layer. * AX.25 028a Jonathan(G4KLX) Changes to state machine. * AX.25 028b Jonathan(G4KLX) Extracted ax25 control block * from sock structure. * AX.25 029 Alan(GW4PTS) Combined 028b and some KA9Q code * Jonathan(G4KLX) and removed all the old Berkeley, added IP mode registration. * Darryl(G7LED) stuff. Cross-port digipeating. Minor fixes and enhancements. * Alan(GW4PTS) Missed suser() on axassociate checks * AX.25 030 Alan(GW4PTS) Added variable length headers. * Jonathan(G4KLX) Added BPQ Ethernet interface. * Steven(GW7RRM) Added digi-peating control ioctl. * Added extended AX.25 support. * Added AX.25 frame segmentation. * Darryl(G7LED) Changed connect(), recvfrom(), sendto() sockaddr/addrlen to * fall inline with bind() and new policy. * Moved digipeating ctl to new ax25_dev structs. * Fixed ax25_release(), set TCP_CLOSE, wakeup app * context, THEN make the sock dead. * Alan(GW4PTS) Cleaned up for single recvmsg methods. * Alan(GW4PTS) Fixed not clearing error on connect failure. * AX.25 031 Jonathan(G4KLX) Added binding to any device. * Joerg(DL1BKE) Added DAMA support, fixed (?) digipeating, fixed buffer locking * for "virtual connect" mode... Result: Probably the * "Most Buggiest Code You've Ever Seen" (TM) * HaJo(DD8NE) Implementation of a T5 (idle) timer * Joerg(DL1BKE) Renamed T5 to IDLE and changed behaviour: * the timer gets reloaded on every received or transmitted * I frame for IP or NETROM. The idle timer is not active * on "vanilla AX.25" connections. Furthermore added PACLEN * to provide AX.25-layer based fragmentation (like WAMPES) * AX.25 032 Joerg(DL1BKE) Fixed DAMA timeout error. * ax25_send_frame() limits the number of enqueued * datagrams per socket. * AX.25 033 Jonathan(G4KLX) Removed auto-router. * Hans(PE1AYX) Converted to Module. * Joerg(DL1BKE) Moved BPQ Ethernet to separate driver. * AX.25 034 Jonathan(G4KLX) 2.1 changes * Alan(GW4PTS) Small POSIXisations * AX.25 035 Alan(GW4PTS) Started fixing to the new * format. * Hans(PE1AYX) Fixed interface to IP layer. * Alan(GW4PTS) Added asynchronous support. * Frederic(F1OAT) Support for pseudo-digipeating. * Jonathan(G4KLX) Support for packet forwarding. * AX.25 036 Jonathan(G4KLX) Major restructuring. * Joerg(DL1BKE) Fixed DAMA Slave. * Jonathan(G4KLX) Fix wildcard listen parameter setting. * AX.25 037 Jonathan(G4KLX) New timer architecture. * AX.25 038 Matthias(DG2FEF) Small fixes to the syscall interface to make kernel * independent of AX25_MAX_DIGIS used by applications. * Tomi(OH2BNS) Fixed ax25_getname(). * Joerg(DL1BKE) Starting to phase out the support for full_sockaddr_ax25 * with only 6 digipeaters and sockaddr_ax25 in ax25_bind(), * ax25_connect() and ax25_sendmsg() * Joerg(DL1BKE) Added support for SO_BINDTODEVICE * Arnaldo C. Melo s/suser/capable(CAP_NET_ADMIN)/, some more cleanups * Michal Ostrowski Module initialization cleanup. * Jeroen(PE1RXQ) Use sock_orphan() on release. */ #include <linux/config.h> #include <linux/module.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/timer.h> #include <linux/string.h> #include <linux/sockios.h> #include <linux/net.h> #include <net/ax25.h> #include <linux/inet.h> #include <linux/netdevice.h> #include <linux/if_arp.h> #include <linux/skbuff.h> #include <net/sock.h> #include <asm/uaccess.h> #include <asm/system.h> #include <linux/fcntl.h> #include <linux/termios.h> /* For TIOCINQ/OUTQ */ #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/notifier.h> #include <linux/proc_fs.h> #include <linux/stat.h> #include <linux/netfilter.h> #include <linux/sysctl.h> #include <linux/init.h> #include <net/ip.h> #include <net/arp.h> ax25_cb *volatile ax25_list; static struct proto_ops ax25_proto_ops; /* * Free an allocated ax25 control block. This is done to centralise * the MOD count code. */ void ax25_free_cb(ax25_cb *ax25) { if (ax25->digipeat != NULL) { kfree(ax25->digipeat); ax25->digipeat = NULL; } kfree(ax25); MOD_DEC_USE_COUNT; } static void ax25_free_sock(struct sock *sk) { ax25_free_cb(sk->protinfo.ax25); } /* * Socket removal during an interrupt is now safe. */ static void ax25_remove_socket(ax25_cb *ax25) { ax25_cb *s; unsigned long flags; save_flags(flags); cli(); if ((s = ax25_list) == ax25) { ax25_list = s->next; restore_flags(flags); return; } while (s != NULL && s->next != NULL) { if (s->next == ax25) { s->next = ax25->next; restore_flags(flags); return; } s = s->next; } restore_flags(flags); } /* * Kill all bound sockets on a dropped device. */ static void ax25_kill_by_device(struct net_device *dev) { ax25_dev *ax25_dev; ax25_cb *s; if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) return; for (s = ax25_list; s != NULL; s = s->next) { if (s->ax25_dev == ax25_dev) { s->ax25_dev = NULL; ax25_disconnect(s, ENETUNREACH); } } } /* * Handle device status changes. */ static int ax25_device_event(struct notifier_block *this,unsigned long event, void *ptr) { struct net_device *dev = (struct net_device *)ptr; /* Reject non AX.25 devices */ if (dev->type != ARPHRD_AX25) return NOTIFY_DONE; switch (event) { case NETDEV_UP: ax25_dev_device_up(dev); break; case NETDEV_DOWN: ax25_kill_by_device(dev); ax25_rt_device_down(dev); ax25_dev_device_down(dev); break; default: break; } return NOTIFY_DONE; } /* * Add a socket to the bound sockets list. */ void ax25_insert_socket(ax25_cb *ax25) { unsigned long flags; save_flags(flags); cli(); ax25->next = ax25_list; ax25_list = ax25; restore_flags(flags); } /* * Find a socket that wants to accept the SABM we have just * received. */ struct sock *ax25_find_listener(ax25_address *addr, int digi, struct net_device *dev, int type) { unsigned long flags; ax25_cb *s; save_flags(flags); cli(); for (s = ax25_list; s != NULL; s = s->next) { if ((s->iamdigi && !digi) || (!s->iamdigi && digi)) continue; if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 && s->sk->type == type && s->sk->state == TCP_LISTEN) { /* If device is null we match any device */ if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) { restore_flags(flags); return s->sk; } } } restore_flags(flags); return NULL; } /* * Find an AX.25 socket given both ends. */ struct sock *ax25_find_socket(ax25_address *my_addr, ax25_address *dest_addr, int type) { ax25_cb *s; unsigned long flags; save_flags(flags); cli(); for (s = ax25_list; s != NULL; s = s->next) { if (s->sk != NULL && ax25cmp(&s->source_addr, my_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->sk->type == type) { restore_flags(flags); return s->sk; } } restore_flags(flags); return NULL; } /* * Find an AX.25 control block given both ends. It will only pick up * floating AX.25 control blocks or non Raw socket bound control blocks. */ ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr, ax25_digi *digi, struct net_device *dev) { ax25_cb *s; unsigned long flags; save_flags(flags); cli(); for (s = ax25_list; s != NULL; s = s->next) { if (s->sk != NULL && s->sk->type != SOCK_SEQPACKET) continue; if (s->ax25_dev == NULL) continue; if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) { if (digi != NULL && digi->ndigi != 0) { if (s->digipeat == NULL) continue; if (ax25digicmp(s->digipeat, digi) != 0) continue; } else { if (s->digipeat != NULL && s->digipeat->ndigi != 0) continue; } restore_flags(flags); return s; } } restore_flags(flags); return NULL; } /* * Look for any matching address - RAW sockets can bind to arbitrary names */ struct sock *ax25_addr_match(ax25_address *addr) { unsigned long flags; ax25_cb *s; save_flags(flags); cli(); for (s = ax25_list; s != NULL; s = s->next) { if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 && s->sk->type == SOCK_RAW) { restore_flags(flags); return s->sk; } } restore_flags(flags); return NULL; } void ax25_send_to_raw(struct sock *sk, struct sk_buff *skb, int proto) { struct sk_buff *copy; while (sk != NULL) { if (sk->type == SOCK_RAW && sk->protocol == proto && atomic_read(&sk->rmem_alloc) <= sk->rcvbuf) { if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL) return; if (sock_queue_rcv_skb(sk, copy) != 0) kfree_skb(copy); } sk = sk->next; } } /* * Deferred destroy. */ void ax25_destroy_socket(ax25_cb *); /* * Handler for deferred kills. */ static void ax25_destroy_timer(unsigned long data) { ax25_destroy_socket((ax25_cb *)data); } /* * 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. */ void ax25_destroy_socket(ax25_cb *ax25) /* Not static as it's used by the timer */ { struct sk_buff *skb; unsigned long flags; save_flags(flags); cli(); ax25_stop_heartbeat(ax25); ax25_stop_t1timer(ax25); ax25_stop_t2timer(ax25); ax25_stop_t3timer(ax25); ax25_stop_idletimer(ax25); ax25_remove_socket(ax25); ax25_clear_queues(ax25); /* Flush the queues */ if (ax25->sk != NULL) { while ((skb = skb_dequeue(&ax25->sk->receive_queue)) != NULL) { if (skb->sk != ax25->sk) { /* A pending connection */ skb->sk->dead = 1; /* Queue the unaccepted socket for death */ ax25_start_heartbeat(skb->sk->protinfo.ax25); skb->sk->protinfo.ax25->state = AX25_STATE_0; } kfree_skb(skb); } } if (ax25->sk != NULL) { if (atomic_read(&ax25->sk->wmem_alloc) != 0 || atomic_read(&ax25->sk->rmem_alloc) != 0) { /* Defer: outstanding buffers */ init_timer(&ax25->timer); ax25->timer.expires = jiffies + 10 * HZ; ax25->timer.function = ax25_destroy_timer; ax25->timer.data = (unsigned long)ax25; add_timer(&ax25->timer); } else { sk_free(ax25->sk); } } else { ax25_free_cb(ax25); } restore_flags(flags); } /* * dl1bke 960311: set parameters for existing AX.25 connections, * includes a KILL command to abort any connection. * VERY useful for debugging ;-) */ static int ax25_ctl_ioctl(const unsigned int cmd, void *arg) { struct ax25_ctl_struct ax25_ctl; ax25_digi digi; ax25_dev *ax25_dev; ax25_cb *ax25; unsigned int k; if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl))) return -EFAULT; if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL) return -ENODEV; if (ax25_ctl.digi_count > AX25_MAX_DIGIS) return -EINVAL; digi.ndigi = ax25_ctl.digi_count; for (k = 0; k < digi.ndigi; k++) digi.calls[k] = ax25_ctl.digi_addr[k]; if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL) return -ENOTCONN; switch (ax25_ctl.cmd) { case AX25_KILL: ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); #ifdef CONFIG_AX25_DAMA_SLAVE if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE) ax25_dama_off(ax25); #endif ax25_disconnect(ax25, ENETRESET); break; case AX25_WINDOW: if (ax25->modulus == AX25_MODULUS) { if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7) return -EINVAL; } else { if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) return -EINVAL; } ax25->window = ax25_ctl.arg; break; case AX25_T1: if (ax25_ctl.arg < 1) return -EINVAL; ax25->rtt = (ax25_ctl.arg * HZ) / 2; ax25->t1 = ax25_ctl.arg * HZ; break; case AX25_T2: if (ax25_ctl.arg < 1) return -EINVAL; ax25->t2 = ax25_ctl.arg * HZ; break; case AX25_N2: if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) return -EINVAL; ax25->n2count = 0; ax25->n2 = ax25_ctl.arg; break; case AX25_T3: if (ax25_ctl.arg < 0) return -EINVAL; ax25->t3 = ax25_ctl.arg * HZ; break; case AX25_IDLE: if (ax25_ctl.arg < 0) return -EINVAL; ax25->idle = ax25_ctl.arg * 60 * HZ; break; case AX25_PACLEN: if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) return -EINVAL; ax25->paclen = ax25_ctl.arg; break; default: return -EINVAL; } return 0; } /* * Fill in a created AX.25 created control block with the default * values for a particular device. */ void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev) { ax25->ax25_dev = ax25_dev; if (ax25->ax25_dev != NULL) { ax25->rtt = ax25_dev->values[AX25_VALUES_T1] / 2; ax25->t1 = ax25_dev->values[AX25_VALUES_T1]; ax25->t2 = ax25_dev->values[AX25_VALUES_T2]; ax25->t3 = ax25_dev->values[AX25_VALUES_T3]; ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; ax25->idle = ax25_dev->values[AX25_VALUES_IDLE]; ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF]; if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) { ax25->modulus = AX25_EMODULUS; ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW]; } else { ax25->modulus = AX25_MODULUS; ax25->window = ax25_dev->values[AX25_VALUES_WINDOW]; } } else { ax25->rtt = AX25_DEF_T1 / 2; ax25->t1 = AX25_DEF_T1; ax25->t2 = AX25_DEF_T2; ax25->t3 = AX25_DEF_T3; ax25->n2 = AX25_DEF_N2; ax25->paclen = AX25_DEF_PACLEN; ax25->idle = AX25_DEF_IDLE; ax25->backoff = AX25_DEF_BACKOFF; if (AX25_DEF_AXDEFMODE) { ax25->modulus = AX25_EMODULUS; ax25->window = AX25_DEF_EWINDOW; } else { ax25->modulus = AX25_MODULUS; ax25->window = AX25_DEF_WINDOW; } } } /* * Create an empty AX.25 control block. */ ax25_cb *ax25_create_cb(void) { ax25_cb *ax25; if ((ax25 = kmalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL) return NULL; MOD_INC_USE_COUNT; memset(ax25, 0x00, sizeof(*ax25)); skb_queue_head_init(&ax25->write_queue); skb_queue_head_init(&ax25->frag_queue); skb_queue_head_init(&ax25->ack_queue); skb_queue_head_init(&ax25->reseq_queue); init_timer(&ax25->timer); init_timer(&ax25->t1timer); init_timer(&ax25->t2timer); init_timer(&ax25->t3timer); init_timer(&ax25->idletimer); ax25_fillin_cb(ax25, NULL); ax25->state = AX25_STATE_0; return ax25; } /* * Handling for system calls applied via the various interfaces to an * AX25 socket object */ static int ax25_setsockopt(struct socket *sock, int level, int optname, char *optval, int optlen) { struct sock *sk = sock->sk; struct net_device *dev; char devname[IFNAMSIZ]; int opt; if (level != SOL_AX25) return -ENOPROTOOPT; if (optlen < sizeof(int)) return -EINVAL; if (get_user(opt, (int *)optval)) return -EFAULT; switch (optname) { case AX25_WINDOW: if (sk->protinfo.ax25->modulus == AX25_MODULUS) { if (opt < 1 || opt > 7) return -EINVAL; } else { if (opt < 1 || opt > 63) return -EINVAL; } sk->protinfo.ax25->window = opt; return 0; case AX25_T1: if (opt < 1) return -EINVAL; sk->protinfo.ax25->rtt = (opt * HZ) / 2; sk->protinfo.ax25->t1 = opt * HZ; return 0; case AX25_T2: if (opt < 1) return -EINVAL; sk->protinfo.ax25->t2 = opt * HZ; return 0; case AX25_N2: if (opt < 1 || opt > 31) return -EINVAL; sk->protinfo.ax25->n2 = opt; return 0; case AX25_T3: if (opt < 1) return -EINVAL; sk->protinfo.ax25->t3 = opt * HZ; return 0; case AX25_IDLE: if (opt < 0) return -EINVAL; sk->protinfo.ax25->idle = opt * 60 * HZ; return 0; case AX25_BACKOFF: if (opt < 0 || opt > 2) return -EINVAL; sk->protinfo.ax25->backoff = opt; return 0; case AX25_EXTSEQ: sk->protinfo.ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; return 0; case AX25_PIDINCL: sk->protinfo.ax25->pidincl = opt ? 1 : 0; return 0; case AX25_IAMDIGI: sk->protinfo.ax25->iamdigi = opt ? 1 : 0; return 0; case AX25_PACLEN: if (opt < 16 || opt > 65535) return -EINVAL; sk->protinfo.ax25->paclen = opt; return 0; case SO_BINDTODEVICE: if (optlen > IFNAMSIZ) optlen=IFNAMSIZ; if (copy_from_user(devname, optval, optlen)) return -EFAULT; dev = dev_get_by_name(devname); if (dev == NULL) return -ENODEV; if (sk->type == SOCK_SEQPACKET && (sock->state != SS_UNCONNECTED || sk->state == TCP_LISTEN)) return -EADDRNOTAVAIL; sk->protinfo.ax25->ax25_dev = ax25_dev_ax25dev(dev); ax25_fillin_cb(sk->protinfo.ax25, sk->protinfo.ax25->ax25_dev); return 0; default: return -ENOPROTOOPT; } } static int ax25_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { struct sock *sk = sock->sk; struct ax25_dev *ax25_dev; char devname[IFNAMSIZ]; void *valptr; int val = 0; int maxlen, length; if (level != SOL_AX25) return -ENOPROTOOPT; if (get_user(maxlen, optlen)) return -EFAULT; if (maxlen < 1) return -EFAULT; valptr = (void *) &val; length = min_t(unsigned int, maxlen, sizeof(int)); switch (optname) { case AX25_WINDOW: val = sk->protinfo.ax25->window; break; case AX25_T1: val = sk->protinfo.ax25->t1 / HZ; break; case AX25_T2: val = sk->protinfo.ax25->t2 / HZ; break; case AX25_N2: val = sk->protinfo.ax25->n2; break; case AX25_T3: val = sk->protinfo.ax25->t3 / HZ; break; case AX25_IDLE: val = sk->protinfo.ax25->idle / (60 * HZ); break; case AX25_BACKOFF: val = sk->protinfo.ax25->backoff; break; case AX25_EXTSEQ: val = (sk->protinfo.ax25->modulus == AX25_EMODULUS); break; case AX25_PIDINCL: val = sk->protinfo.ax25->pidincl; break; case AX25_IAMDIGI: val = sk->protinfo.ax25->iamdigi; break; case AX25_PACLEN: val = sk->protinfo.ax25->paclen; break; case SO_BINDTODEVICE: ax25_dev = sk->protinfo.ax25->ax25_dev; if (ax25_dev != NULL && ax25_dev->dev != NULL) { strncpy(devname, ax25_dev->dev->name, IFNAMSIZ); length = min_t(unsigned int, strlen(ax25_dev->dev->name)+1, maxlen); devname[length-1] = '\0'; } else { *devname = '\0'; length = 1; } valptr = (void *) devname; break; default: return -ENOPROTOOPT; } if (put_user(length, optlen)) return -EFAULT; return copy_to_user(optval, valptr, length) ? -EFAULT : 0; } static int ax25_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; if (sk->type == SOCK_SEQPACKET && sk->state != TCP_LISTEN) { sk->max_ack_backlog = backlog; sk->state = TCP_LISTEN; return 0; } return -EOPNOTSUPP; } int ax25_create(struct socket *sock, int protocol) { struct sock *sk; ax25_cb *ax25; switch (sock->type) { case SOCK_DGRAM: if (protocol == 0 || protocol == PF_AX25) protocol = AX25_P_TEXT; break; case SOCK_SEQPACKET: switch (protocol) { case 0: case PF_AX25: /* For CLX */ protocol = AX25_P_TEXT; break; case AX25_P_SEGMENT: #ifdef CONFIG_INET case AX25_P_ARP: case AX25_P_IP: #endif #ifdef CONFIG_NETROM case AX25_P_NETROM: #endif #ifdef CONFIG_ROSE case AX25_P_ROSE: #endif return -ESOCKTNOSUPPORT; #ifdef CONFIG_NETROM_MODULE case AX25_P_NETROM: if (ax25_protocol_is_registered(AX25_P_NETROM)) return -ESOCKTNOSUPPORT; #endif #ifdef CONFIG_ROSE_MODULE case AX25_P_ROSE: if (ax25_protocol_is_registered(AX25_P_ROSE)) return -ESOCKTNOSUPPORT; #endif default: break; } break; case SOCK_RAW: break; default: return -ESOCKTNOSUPPORT; } if ((sk = sk_alloc(PF_AX25, GFP_ATOMIC, 1)) == NULL) return -ENOMEM; if ((ax25 = ax25_create_cb()) == NULL) { sk_free(sk); return -ENOMEM; } sock_init_data(sock, sk); sk->destruct = ax25_free_sock; sock->ops = &ax25_proto_ops; sk->protocol = protocol; ax25->sk = sk; sk->protinfo.ax25 = ax25; return 0; } struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) { struct sock *sk; ax25_cb *ax25; if ((sk = sk_alloc(PF_AX25, GFP_ATOMIC, 1)) == NULL) return NULL; if ((ax25 = ax25_create_cb()) == NULL) { sk_free(sk); return NULL; } switch (osk->type) { case SOCK_DGRAM: break; case SOCK_SEQPACKET: break; default: sk_free(sk); ax25_free_cb(ax25); return NULL; } sock_init_data(NULL, sk); sk->destruct = ax25_free_sock; sk->type = osk->type; sk->socket = osk->socket; sk->priority = osk->priority; sk->protocol = osk->protocol; sk->rcvbuf = osk->rcvbuf; sk->sndbuf = osk->sndbuf; sk->debug = osk->debug; sk->state = TCP_ESTABLISHED; sk->sleep = osk->sleep; sk->zapped = osk->zapped; ax25->modulus = osk->protinfo.ax25->modulus; ax25->backoff = osk->protinfo.ax25->backoff; ax25->pidincl = osk->protinfo.ax25->pidincl; ax25->iamdigi = osk->protinfo.ax25->iamdigi; ax25->rtt = osk->protinfo.ax25->rtt; ax25->t1 = osk->protinfo.ax25->t1; ax25->t2 = osk->protinfo.ax25->t2; ax25->t3 = osk->protinfo.ax25->t3; ax25->n2 = osk->protinfo.ax25->n2; ax25->idle = osk->protinfo.ax25->idle; ax25->paclen = osk->protinfo.ax25->paclen; ax25->window = osk->protinfo.ax25->window; ax25->ax25_dev = ax25_dev; ax25->source_addr = osk->protinfo.ax25->source_addr; if (osk->protinfo.ax25->digipeat != NULL) { if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) { sk_free(sk); return NULL; } memcpy(ax25->digipeat, osk->protinfo.ax25->digipeat, sizeof(ax25_digi)); } sk->protinfo.ax25 = ax25; ax25->sk = sk; return sk; } static int ax25_release(struct socket *sock) { struct sock *sk = sock->sk; if (sk == NULL) return 0; if (sk->type == SOCK_SEQPACKET) { switch (sk->protinfo.ax25->state) { case AX25_STATE_0: ax25_disconnect(sk->protinfo.ax25, 0); ax25_destroy_socket(sk->protinfo.ax25); break; case AX25_STATE_1: case AX25_STATE_2: ax25_send_control(sk->protinfo.ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); ax25_disconnect(sk->protinfo.ax25, 0); ax25_destroy_socket(sk->protinfo.ax25); break; case AX25_STATE_3: case AX25_STATE_4: ax25_clear_queues(sk->protinfo.ax25); sk->protinfo.ax25->n2count = 0; switch (sk->protinfo.ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { case AX25_PROTO_STD_SIMPLEX: case AX25_PROTO_STD_DUPLEX: ax25_send_control(sk->protinfo.ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); ax25_stop_t2timer(sk->protinfo.ax25); ax25_stop_t3timer(sk->protinfo.ax25); ax25_stop_idletimer(sk->protinfo.ax25); break; #ifdef CONFIG_AX25_DAMA_SLAVE case AX25_PROTO_DAMA_SLAVE: ax25_stop_t3timer(sk->protinfo.ax25); ax25_stop_idletimer(sk->protinfo.ax25); break; #endif } ax25_calculate_t1(sk->protinfo.ax25); ax25_start_t1timer(sk->protinfo.ax25); sk->protinfo.ax25->state = AX25_STATE_2; sk->state = TCP_CLOSE; sk->shutdown |= SEND_SHUTDOWN; sk->state_change(sk); sock_orphan(sk); sk->destroy = 1; break; default: break; } } else { sk->state = TCP_CLOSE; sk->shutdown |= SEND_SHUTDOWN; sk->state_change(sk); sock_orphan(sk); ax25_destroy_socket(sk->protinfo.ax25); } sock->sk = NULL; sk->socket = NULL; /* Not used, but we should do this */ return 0; } /* * We support a funny extension here so you can (as root) give any callsign * digipeated via a local address as source. This hack is obsolete now * that we've implemented support for SO_BINDTODEVICE. It is however small * and trivially backward compatible. */ static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sock *sk = sock->sk; struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; ax25_address *call; ax25_dev *ax25_dev = NULL; if (sk->zapped == 0) return -EINVAL; if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { /* support for old structure may go away some time */ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || (addr_len > sizeof(struct full_sockaddr_ax25))) return -EINVAL; printk(KERN_WARNING "ax25_bind(): %s uses old (6 digipeater) socket structure.\n", current->comm); } if (addr->fsa_ax25.sax25_family != AF_AX25) return -EINVAL; call = ax25_findbyuid(current->euid); if (call == NULL && ax25_uid_policy && !capable(CAP_NET_ADMIN)) return -EACCES; if (call == NULL) sk->protinfo.ax25->source_addr = addr->fsa_ax25.sax25_call; else sk->protinfo.ax25->source_addr = *call; /* * User already set interface with SO_BINDTODEVICE */ if (sk->protinfo.ax25->ax25_dev != NULL) goto done; if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) { if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 && (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) return -EADDRNOTAVAIL; } else { if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) return -EADDRNOTAVAIL; } if (ax25_dev != NULL) ax25_fillin_cb(sk->protinfo.ax25, ax25_dev); done: ax25_insert_socket(sk->protinfo.ax25); sk->zapped = 0; return 0; } /* * FIXME: nonblock behaviour looks like it may have a bug. */ static int ax25_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; ax25_digi *digi = NULL; int ct = 0, err; /* deal with restarts */ if (sock->state == SS_CONNECTING) { switch (sk->state) { case TCP_SYN_SENT: /* still trying */ return -EINPROGRESS; case TCP_ESTABLISHED: /* connection established */ sock->state = SS_CONNECTED; return 0; case TCP_CLOSE: /* connection refused */ sock->state = SS_UNCONNECTED; return -ECONNREFUSED; } } if (sk->state == TCP_ESTABLISHED && sk->type == SOCK_SEQPACKET) return -EISCONN; /* No reconnect on a seqpacket socket */ sk->state = TCP_CLOSE; sock->state = SS_UNCONNECTED; /* * some sanity checks. code further down depends on this */ if (addr_len == sizeof(struct sockaddr_ax25)) { /* support for this will go away in early 2.5.x */ printk(KERN_WARNING "ax25_connect(): %s uses obsolete socket structure\n", current->comm); } else if (addr_len != sizeof(struct full_sockaddr_ax25)) { /* support for old structure may go away some time */ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || (addr_len > sizeof(struct full_sockaddr_ax25))) return -EINVAL; printk(KERN_WARNING "ax25_connect(): %s uses old (6 digipeater) socket structure.\n", current->comm); } if (fsa->fsa_ax25.sax25_family != AF_AX25) return -EINVAL; if (sk->protinfo.ax25->digipeat != NULL) { kfree(sk->protinfo.ax25->digipeat); sk->protinfo.ax25->digipeat = NULL; } /* * Handle digi-peaters to be used. */ if (addr_len > sizeof(struct sockaddr_ax25) && fsa->fsa_ax25.sax25_ndigis != 0) { /* Valid number of digipeaters ? */ if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) return -EINVAL; if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) return -ENOBUFS; digi->ndigi = fsa->fsa_ax25.sax25_ndigis; digi->lastrepeat = -1; while (ct < fsa->fsa_ax25.sax25_ndigis) { if ((fsa->fsa_digipeater[ct].ax25_call[6] & AX25_HBIT) && sk->protinfo.ax25->iamdigi) { digi->repeated[ct] = 1; digi->lastrepeat = ct; } else { digi->repeated[ct] = 0; } digi->calls[ct] = fsa->fsa_digipeater[ct]; ct++; } } /* * Must bind first - autobinding in this may or may not work. If * the socket is already bound, check to see if the device has * been filled in, error if it hasn't. */ if (sk->zapped) { /* check if we can remove this feature. It is broken. */ printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n", current->comm); if ((err = ax25_rt_autobind(sk->protinfo.ax25, &fsa->fsa_ax25.sax25_call)) < 0) return err; ax25_fillin_cb(sk->protinfo.ax25, sk->protinfo.ax25->ax25_dev); ax25_insert_socket(sk->protinfo.ax25); } else { if (sk->protinfo.ax25->ax25_dev == NULL) return -EHOSTUNREACH; } if (sk->type == SOCK_SEQPACKET && ax25_find_cb(&sk->protinfo.ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, sk->protinfo.ax25->ax25_dev->dev) != NULL) { if (digi != NULL) kfree(digi); return -EADDRINUSE; /* Already such a connection */ } sk->protinfo.ax25->dest_addr = fsa->fsa_ax25.sax25_call; sk->protinfo.ax25->digipeat = digi; /* First the easy one */ if (sk->type != SOCK_SEQPACKET) { sock->state = SS_CONNECTED; sk->state = TCP_ESTABLISHED; return 0; } /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ sock->state = SS_CONNECTING; sk->state = TCP_SYN_SENT; switch (sk->protinfo.ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { case AX25_PROTO_STD_SIMPLEX: case AX25_PROTO_STD_DUPLEX: ax25_std_establish_data_link(sk->protinfo.ax25); break; #ifdef CONFIG_AX25_DAMA_SLAVE case AX25_PROTO_DAMA_SLAVE: sk->protinfo.ax25->modulus = AX25_MODULUS; sk->protinfo.ax25->window = sk->protinfo.ax25->ax25_dev->values[AX25_VALUES_WINDOW]; if (sk->protinfo.ax25->ax25_dev->dama.slave) ax25_ds_establish_data_link(sk->protinfo.ax25); else ax25_std_establish_data_link(sk->protinfo.ax25); break; #endif } sk->protinfo.ax25->state = AX25_STATE_1; ax25_start_heartbeat(sk->protinfo.ax25); /* Now the loop */ if (sk->state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) return -EINPROGRESS; cli(); /* To avoid races on the sleep */ /* A DM or timeout will go to closed, a UA will go to ABM */ while (sk->state == TCP_SYN_SENT) { interruptible_sleep_on(sk->sleep); if (signal_pending(current)) { sti(); return -ERESTARTSYS; } } if (sk->state != TCP_ESTABLISHED) { /* Not in ABM, not in WAIT_UA -> failed */ sti(); sock->state = SS_UNCONNECTED; return sock_error(sk); /* Always set at this point */ } sock->state = SS_CONNECTED; sti(); return 0; } static int ax25_accept(struct socket *sock, struct socket *newsock, int flags) { struct sock *sk; struct sock *newsk; struct sk_buff *skb; if (sock->state != SS_UNCONNECTED) return -EINVAL; if ((sk = sock->sk) == NULL) return -EINVAL; if (sk->type != SOCK_SEQPACKET) return -EOPNOTSUPP; if (sk->state != TCP_LISTEN) return -EINVAL; /* * The read queue this time is holding sockets ready to use * hooked into the SABM we saved */ do { if ((skb = skb_dequeue(&sk->receive_queue)) == NULL) { if (flags & O_NONBLOCK) return -EWOULDBLOCK; interruptible_sleep_on(sk->sleep); if (signal_pending(current)) return -ERESTARTSYS; } } while (skb == NULL); newsk = skb->sk; newsk->pair = NULL; newsk->socket = newsock; newsk->sleep = &newsock->wait; /* Now attach up the new socket */ kfree_skb(skb); sk->ack_backlog--; newsock->sk = newsk; newsock->state = SS_CONNECTED; return 0; } static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { struct sock *sk = sock->sk; struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; unsigned char ndigi, i; if (peer != 0) { if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; fsa->fsa_ax25.sax25_family = AF_AX25; fsa->fsa_ax25.sax25_call = sk->protinfo.ax25->dest_addr; fsa->fsa_ax25.sax25_ndigis = 0; if (sk->protinfo.ax25->digipeat != NULL) { ndigi = sk->protinfo.ax25->digipeat->ndigi; fsa->fsa_ax25.sax25_ndigis = ndigi; for (i = 0; i < ndigi; i++) fsa->fsa_digipeater[i] = sk->protinfo.ax25->digipeat->calls[i]; } } else { fsa->fsa_ax25.sax25_family = AF_AX25; fsa->fsa_ax25.sax25_call = sk->protinfo.ax25->source_addr; fsa->fsa_ax25.sax25_ndigis = 1; if (sk->protinfo.ax25->ax25_dev != NULL) { memcpy(&fsa->fsa_digipeater[0], sk->protinfo.ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); } else { fsa->fsa_digipeater[0] = null_ax25_address; } } *uaddr_len = sizeof (struct full_sockaddr_ax25); return 0; } static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, int len, struct scm_cookie *scm) { struct sock *sk = sock->sk; struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; int err; struct sockaddr_ax25 sax; struct sk_buff *skb; unsigned char *asmptr; int size; ax25_digi *dp; ax25_digi dtmp; int lv; int addr_len = msg->msg_namelen; if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR)) return -EINVAL; if (sk->zapped) return -EADDRNOTAVAIL; if (sk->shutdown & SEND_SHUTDOWN) { send_sig(SIGPIPE, current, 0); return -EPIPE; } if (sk->protinfo.ax25->ax25_dev == NULL) return -ENETUNREACH; if (usax != NULL) { if (usax->sax25_family != AF_AX25) return -EINVAL; if (addr_len == sizeof(struct sockaddr_ax25)) { printk(KERN_WARNING "ax25_sendmsg(): %s uses obsolete socket structure\n", current->comm); } else if (addr_len != sizeof(struct full_sockaddr_ax25)) { /* support for old structure may go away some time */ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || (addr_len > sizeof(struct full_sockaddr_ax25))) return -EINVAL; printk(KERN_WARNING "ax25_sendmsg(): %s uses old (6 digipeater) socket structure.\n", current->comm); } if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) { int ct = 0; struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax; /* Valid number of digipeaters ? */ if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) return -EINVAL; dtmp.ndigi = usax->sax25_ndigis; while (ct < usax->sax25_ndigis) { dtmp.repeated[ct] = 0; dtmp.calls[ct] = fsa->fsa_digipeater[ct]; ct++; } dtmp.lastrepeat = 0; } sax = *usax; if (sk->type == SOCK_SEQPACKET && ax25cmp(&sk->protinfo.ax25->dest_addr, &sax.sax25_call) != 0) return -EISCONN; if (usax->sax25_ndigis == 0) dp = NULL; else dp = &dtmp; } else { /* * FIXME: 1003.1g - if the socket is like this because * it has become closed (not started closed) and is VC * we ought to SIGPIPE, EPIPE */ if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; sax.sax25_family = AF_AX25; sax.sax25_call = sk->protinfo.ax25->dest_addr; dp = sk->protinfo.ax25->digipeat; } SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n"); /* Build a packet */ SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n"); /* Assume the worst case */ size = len + 3 + ax25_addr_size(dp) + AX25_BPQ_HEADER_LEN; if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) return err; skb_reserve(skb, size - len); SOCK_DEBUG(sk, "AX.25: Appending user data\n"); /* User data follows immediately after the AX.25 data */ memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); skb->nh.raw = skb->data; /* Add the PID if one is not supplied by the user in the skb */ if (!sk->protinfo.ax25->pidincl) { asmptr = skb_push(skb, 1); *asmptr = sk->protocol; } SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n"); if (sk->type == SOCK_SEQPACKET) { /* Connected mode sockets go via the LAPB machine */ if (sk->state != TCP_ESTABLISHED) { kfree_skb(skb); return -ENOTCONN; } ax25_output(sk->protinfo.ax25, sk->protinfo.ax25->paclen, skb); /* Shove it onto the queue and kick */ return len; } else { asmptr = skb_push(skb, 1 + ax25_addr_size(dp)); SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp); if (dp != NULL) SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi); /* Build an AX.25 header */ asmptr += (lv = ax25_addr_build(asmptr, &sk->protinfo.ax25->source_addr, &sax.sax25_call, dp, AX25_COMMAND, AX25_MODULUS)); SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv); skb->h.raw = asmptr; SOCK_DEBUG(sk, "base=%p pos=%p\n", skb->data, asmptr); *asmptr = AX25_UI; /* Datagram frames go straight out of the door as UI */ skb->dev = sk->protinfo.ax25->ax25_dev->dev; ax25_queue_xmit(skb); return len; } } static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, int size, int flags, struct scm_cookie *scm) { struct sock *sk = sock->sk; int copied; struct sk_buff *skb; int er; /* * This works for seqpacket too. The receiver has ordered the * queue for us! We do one quick check first though */ if (sk->type == SOCK_SEQPACKET && sk->state != TCP_ESTABLISHED) return -ENOTCONN; /* Now we can treat all alike */ if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) return er; if (!sk->protinfo.ax25->pidincl) skb_pull(skb, 1); /* Remove PID */ skb->h.raw = skb->data; copied = skb->len; if (copied > size) { copied = size; msg->msg_flags |= MSG_TRUNC; } skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); if (msg->msg_namelen != 0) { struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; ax25_digi digi; ax25_address dest; ax25_addr_parse(skb->mac.raw+1, skb->data-skb->mac.raw-1, NULL, &dest, &digi, NULL, NULL); sax->sax25_family = AF_AX25; /* We set this correctly, even though we may not let the application know the digi calls further down (because it did NOT ask to know them). This could get political... **/ sax->sax25_ndigis = digi.ndigi; sax->sax25_call = dest; if (sax->sax25_ndigis != 0) { int ct; struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax; for (ct = 0; ct < digi.ndigi; ct++) fsa->fsa_digipeater[ct] = digi.calls[ct]; } msg->msg_namelen = sizeof(struct full_sockaddr_ax25); } skb_free_datagram(sk, skb); return copied; } static int ax25_shutdown(struct socket *sk, int how) { /* FIXME - generate DM and RNR states */ return -EOPNOTSUPP; } static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; switch (cmd) { case TIOCOUTQ: { long amount; amount = sk->sndbuf - atomic_read(&sk->wmem_alloc); if (amount < 0) amount = 0; return put_user(amount, (int *)arg); } case TIOCINQ: { struct sk_buff *skb; long amount = 0L; /* These two are safe on a single CPU system as only user tasks fiddle here */ if ((skb = skb_peek(&sk->receive_queue)) != NULL) amount = skb->len; return put_user(amount, (int *)arg); } case SIOCGSTAMP: if (sk != NULL) { if (sk->stamp.tv_sec == 0) return -ENOENT; return copy_to_user((void *)arg, &sk->stamp, sizeof(struct timeval)) ? -EFAULT : 0; } return -EINVAL; case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */ case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */ case SIOCAX25GETUID: { struct sockaddr_ax25 sax25; if (copy_from_user(&sax25, (void *)arg, sizeof(sax25))) return -EFAULT; return ax25_uid_ioctl(cmd, &sax25); } case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ long amount; if (!capable(CAP_NET_ADMIN)) return -EPERM; if (get_user(amount, (long *)arg)) return -EFAULT; if (amount > AX25_NOUID_BLOCK) return -EINVAL; ax25_uid_policy = amount; return 0; } case SIOCADDRT: case SIOCDELRT: case SIOCAX25OPTRT: if (!capable(CAP_NET_ADMIN)) return -EPERM; return ax25_rt_ioctl(cmd, (void *)arg); case SIOCAX25CTLCON: if (!capable(CAP_NET_ADMIN)) return -EPERM; return ax25_ctl_ioctl(cmd, (void *)arg); case SIOCAX25GETINFO: case SIOCAX25GETINFOOLD: { struct ax25_info_struct ax25_info; ax25_info.t1 = sk->protinfo.ax25->t1 / HZ; ax25_info.t2 = sk->protinfo.ax25->t2 / HZ; ax25_info.t3 = sk->protinfo.ax25->t3 / HZ; ax25_info.idle = sk->protinfo.ax25->idle / (60 * HZ); ax25_info.n2 = sk->protinfo.ax25->n2; ax25_info.t1timer = ax25_display_timer(&sk->protinfo.ax25->t1timer) / HZ; ax25_info.t2timer = ax25_display_timer(&sk->protinfo.ax25->t2timer) / HZ; ax25_info.t3timer = ax25_display_timer(&sk->protinfo.ax25->t3timer) / HZ; ax25_info.idletimer = ax25_display_timer(&sk->protinfo.ax25->idletimer) / (60 * HZ); ax25_info.n2count = sk->protinfo.ax25->n2count; ax25_info.state = sk->protinfo.ax25->state; ax25_info.rcv_q = atomic_read(&sk->rmem_alloc); ax25_info.snd_q = atomic_read(&sk->wmem_alloc); ax25_info.vs = sk->protinfo.ax25->vs; ax25_info.vr = sk->protinfo.ax25->vr; ax25_info.va = sk->protinfo.ax25->va; ax25_info.vs_max = sk->protinfo.ax25->vs; /* reserved */ ax25_info.paclen = sk->protinfo.ax25->paclen; ax25_info.window = sk->protinfo.ax25->window; /* old structure? */ if (cmd == SIOCAX25GETINFOOLD) { static int warned = 0; if (!warned) { printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n", current->comm); warned=1; } if (copy_to_user((void *)arg, &ax25_info, sizeof(struct ax25_info_struct_depreciated))) return -EFAULT; } else { if (copy_to_user((void *)arg, &ax25_info, sizeof(struct ax25_info_struct))) return -EINVAL; } return 0; } case SIOCAX25ADDFWD: case SIOCAX25DELFWD: { struct ax25_fwd_struct ax25_fwd; if (!capable(CAP_NET_ADMIN)) return -EPERM; if (copy_from_user(&ax25_fwd, (void *)arg, sizeof(ax25_fwd))) return -EFAULT; return ax25_fwd_ioctl(cmd, &ax25_fwd); } case SIOCGIFADDR: case SIOCSIFADDR: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCGIFMETRIC: case SIOCSIFMETRIC: return -EINVAL; default: return dev_ioctl(cmd, (void *)arg); } /*NOTREACHED*/ return 0; } static int ax25_get_info(char *buffer, char **start, off_t offset, int length) { ax25_cb *ax25; int k; int len = 0; off_t pos = 0; off_t begin = 0; cli(); /* * New format: * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode */ for (ax25 = ax25_list; ax25 != NULL; ax25 = ax25->next) { len += sprintf(buffer+len, "%8.8lx %s %s%s ", (long) ax25, ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, ax2asc(&ax25->source_addr), ax25->iamdigi? "*":""); len += sprintf(buffer+len, "%s", ax2asc(&ax25->dest_addr)); for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { len += sprintf(buffer+len, ",%s%s", ax2asc(&ax25->digipeat->calls[k]), ax25->digipeat->repeated[k]? "*":""); } len += sprintf(buffer+len, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d", ax25->state, ax25->vs, ax25->vr, ax25->va, ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ, ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ, ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ, ax25_display_timer(&ax25->idletimer) / (60 * HZ), ax25->idle / (60 * HZ), ax25->n2count, ax25->n2, ax25->rtt / HZ, ax25->window, ax25->paclen); if (ax25->sk != NULL) { len += sprintf(buffer + len, " %d %d %ld\n", atomic_read(&ax25->sk->wmem_alloc), atomic_read(&ax25->sk->rmem_alloc), ax25->sk->socket != NULL ? ax25->sk->socket->inode->i_ino : 0L); } else { len += sprintf(buffer + len, " * * *\n"); } pos = begin + len; if (pos < offset) { len = 0; begin = pos; } if (pos > offset + length) break; } sti(); *start = buffer + (offset - begin); len -= (offset - begin); if (len > length) len = length; return(len); } static struct net_proto_family ax25_family_ops = { family: PF_AX25, create: ax25_create, }; static struct proto_ops SOCKOPS_WRAPPED(ax25_proto_ops) = { family: PF_AX25, release: ax25_release, bind: ax25_bind, connect: ax25_connect, socketpair: sock_no_socketpair, accept: ax25_accept, getname: ax25_getname, poll: datagram_poll, ioctl: ax25_ioctl, listen: ax25_listen, shutdown: ax25_shutdown, setsockopt: ax25_setsockopt, getsockopt: ax25_getsockopt, sendmsg: ax25_sendmsg, recvmsg: ax25_recvmsg, mmap: sock_no_mmap, sendpage: sock_no_sendpage, }; #include <linux/smp_lock.h> SOCKOPS_WRAP(ax25_proto, PF_AX25); /* * Called by socket.c on kernel start up */ static struct packet_type ax25_packet_type = { type: __constant_htons(ETH_P_AX25), func: ax25_kiss_rcv, }; static struct notifier_block ax25_dev_notifier = { notifier_call: ax25_device_event, }; EXPORT_SYMBOL(ax25_encapsulate); EXPORT_SYMBOL(ax25_rebuild_header); EXPORT_SYMBOL(ax25_findbyuid); EXPORT_SYMBOL(ax25_find_cb); EXPORT_SYMBOL(ax25_linkfail_register); EXPORT_SYMBOL(ax25_linkfail_release); EXPORT_SYMBOL(ax25_listen_register); EXPORT_SYMBOL(ax25_listen_release); EXPORT_SYMBOL(ax25_protocol_register); EXPORT_SYMBOL(ax25_protocol_release); EXPORT_SYMBOL(ax25_send_frame); EXPORT_SYMBOL(ax25_uid_policy); EXPORT_SYMBOL(ax25cmp); EXPORT_SYMBOL(ax2asc); EXPORT_SYMBOL(asc2ax); EXPORT_SYMBOL(null_ax25_address); EXPORT_SYMBOL(ax25_display_timer); static char banner[] __initdata = KERN_INFO "NET4: G4KLX/GW4PTS AX.25 for Linux. Version 0.37 for Linux NET4.0\n"; static int __init ax25_init(void) { sock_register(&ax25_family_ops); dev_add_pack(&ax25_packet_type); register_netdevice_notifier(&ax25_dev_notifier); ax25_register_sysctl(); proc_net_create("ax25_route", 0, ax25_rt_get_info); proc_net_create("ax25", 0, ax25_get_info); proc_net_create("ax25_calls", 0, ax25_uid_get_info); printk(banner); return 0; } module_init(ax25_init); MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol"); MODULE_LICENSE("GPL"); static void __exit ax25_exit(void) { proc_net_remove("ax25_route"); proc_net_remove("ax25"); proc_net_remove("ax25_calls"); ax25_rt_free(); ax25_uid_free(); ax25_dev_free(); ax25_unregister_sysctl(); unregister_netdevice_notifier(&ax25_dev_notifier); dev_remove_pack(&ax25_packet_type); sock_unregister(PF_AX25); } module_exit(ax25_exit);