cregit-Linux how code gets into the kernel

Release 4.11 net/ax25/af_ax25.c

Directory: net/ax25
/*
 * 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
 * (at your option) any later version.
 *
 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
 */
#include <linux/capability.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/signal.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.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 <linux/uaccess.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/sysctl.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <net/net_namespace.h>
#include <net/tcp_states.h>
#include <net/ip.h>
#include <net/arp.h>




HLIST_HEAD(ax25_list);

DEFINE_SPINLOCK(ax25_list_lock);


static const struct proto_ops ax25_proto_ops;


static void ax25_free_sock(struct sock *sk) { ax25_cb_put(sk_to_ax25(sk)); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1578.95%125.00%
David S. Miller315.79%250.00%
Jeroen Vreeken15.26%125.00%
Total19100.00%4100.00%

/* * Socket removal during an interrupt is now safe. */
static void ax25_cb_del(ax25_cb *ax25) { if (!hlist_unhashed(&ax25->ax25_node)) { spin_lock_bh(&ax25_list_lock); hlist_del_init(&ax25->ax25_node); spin_unlock_bh(&ax25_list_lock); ax25_cb_put(ax25); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2654.17%350.00%
Jeroen Vreeken1735.42%116.67%
Ralf Bächle510.42%233.33%
Total48100.00%6100.00%

/* * 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; spin_lock_bh(&ax25_list_lock); again: ax25_for_each(s, &ax25_list) { if (s->ax25_dev == ax25_dev) { s->ax25_dev = NULL; spin_unlock_bh(&ax25_list_lock); ax25_disconnect(s, ENETUNREACH); spin_lock_bh(&ax25_list_lock); /* The entry could have been deleted from the * list meanwhile and thus the next pointer is * no longer valid. Play it safe and restart * the scan. Forward progress is ensured * because we set s->ax25_dev to NULL and we * are never passed a NULL 'dev' argument. */ goto again; } } spin_unlock_bh(&ax25_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5861.70%450.00%
Jarek Poplawski1819.15%112.50%
Ralf Bächle1212.77%225.00%
Jeroen Vreeken66.38%112.50%
Total94100.00%8100.00%

/* * Handle device status changes. */
static int ax25_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; /* 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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7779.38%763.64%
Eric W. Biedermann99.28%19.09%
Hideaki Yoshifuji / 吉藤英明88.25%218.18%
Jiri Pirko33.09%19.09%
Total97100.00%11100.00%

/* * Add a socket to the bound sockets list. */
void ax25_cb_add(ax25_cb *ax25) { spin_lock_bh(&ax25_list_lock); ax25_cb_hold(ax25); hlist_add_head(&ax25->ax25_node, &ax25_list); spin_unlock_bh(&ax25_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1848.65%457.14%
Jeroen Vreeken1335.14%114.29%
Ralf Bächle616.22%228.57%
Total37100.00%7100.00%

/* * 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) { ax25_cb *s; spin_lock(&ax25_list_lock); ax25_for_each(s, &ax25_list) { if ((s->iamdigi && !digi) || (!s->iamdigi && digi)) continue; if (s->sk && !ax25cmp(&s->source_addr, addr) && s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) { /* If device is null we match any device */ if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) { sock_hold(s->sk); spin_unlock(&ax25_list_lock); return s->sk; } } } spin_unlock(&ax25_list_lock); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11782.39%969.23%
Jeroen Vreeken139.15%17.69%
Ralf Bächle96.34%215.38%
Arnaldo Carvalho de Melo32.11%17.69%
Total142100.00%13100.00%

/* * Find an AX.25 socket given both ends. */
struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr, int type) { struct sock *sk = NULL; ax25_cb *s; spin_lock(&ax25_list_lock); ax25_for_each(s, &ax25_list) { if (s->sk && !ax25cmp(&s->source_addr, my_addr) && !ax25cmp(&s->dest_addr, dest_addr) && s->sk->sk_type == type) { sk = s->sk; sock_hold(sk); break; } } spin_unlock(&ax25_list_lock); return sk; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6765.69%541.67%
Ralf Bächle2524.51%433.33%
Jeroen Vreeken65.88%18.33%
Arnaldo Carvalho de Melo32.94%18.33%
David S. Miller10.98%18.33%
Total102100.00%12100.00%

/* * 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; spin_lock_bh(&ax25_list_lock); ax25_for_each(s, &ax25_list) { if (s->sk && s->sk->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; } ax25_cb_hold(s); spin_unlock_bh(&ax25_list_lock); return s; } } spin_unlock_bh(&ax25_list_lock); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9552.49%654.55%
Alan Cox6535.91%19.09%
Jeroen Vreeken116.08%19.09%
Ralf Bächle94.97%218.18%
Arnaldo Carvalho de Melo10.55%19.09%
Total181100.00%11100.00%

EXPORT_SYMBOL(ax25_find_cb);
void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto) { ax25_cb *s; struct sk_buff *copy; spin_lock(&ax25_list_lock); ax25_for_each(s, &ax25_list) { if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 && s->sk->sk_type == SOCK_RAW && s->sk->sk_protocol == proto && s->ax25_dev->dev == skb->dev && atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) { if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL) continue; if (sock_queue_rcv_skb(s->sk, copy) != 0) kfree_skb(copy); } } spin_unlock(&ax25_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8961.81%646.15%
Jeroen Vreeken4732.64%323.08%
Ralf Bächle53.47%323.08%
Arnaldo Carvalho de Melo32.08%17.69%
Total144100.00%13100.00%

/* * Deferred destroy. */ void ax25_destroy_socket(ax25_cb *); /* * Handler for deferred kills. */
static void ax25_destroy_timer(unsigned long data) { ax25_cb *ax25=(ax25_cb *)data; struct sock *sk; sk=ax25->sk; bh_lock_sock(sk); sock_hold(sk); ax25_destroy_socket(ax25); bh_unlock_sock(sk); sock_put(sk); }

Contributors

PersonTokensPropCommitsCommitProp
Jeroen Vreeken3969.64%125.00%
Linus Torvalds (pre-git)1730.36%375.00%
Total56100.00%4100.00%

/* * 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) { struct sk_buff *skb; ax25_cb_del(ax25); ax25_stop_heartbeat(ax25); ax25_stop_t1timer(ax25); ax25_stop_t2timer(ax25); ax25_stop_t3timer(ax25); ax25_stop_idletimer(ax25); ax25_clear_queues(ax25); /* Flush the queues */ if (ax25->sk != NULL) { while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) { if (skb->sk != ax25->sk) { /* A pending connection */ ax25_cb *sax25 = sk_to_ax25(skb->sk); /* Queue the unaccepted socket for death */ sock_orphan(skb->sk); /* 9A4GL: hack to release unaccepted sockets */ skb->sk->sk_state = TCP_LISTEN; ax25_start_heartbeat(sax25); sax25->state = AX25_STATE_0; } kfree_skb(skb); } skb_queue_purge(&ax25->sk->sk_write_queue); } if (ax25->sk != NULL) { if (sk_has_allocations(ax25->sk)) { /* Defer: outstanding buffers */ setup_timer(&ax25->dtimer, ax25_destroy_timer, (unsigned long)ax25); ax25->dtimer.expires = jiffies + 2 * HZ; add_timer(&ax25->dtimer); } else { struct sock *sk=ax25->sk; ax25->sk=NULL; sock_put(sk); } } else { ax25_cb_put(ax25); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)16670.34%842.11%
Jeroen Vreeken3213.56%210.53%
David S. Miller229.32%315.79%
Pavel Emelyanov93.81%15.26%
Ralf Bächle31.27%210.53%
James Morris20.85%15.26%
Arnaldo Carvalho de Melo10.42%15.26%
Eric Dumazet10.42%15.26%
Total236100.00%19100.00%

/* * 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 __user *arg) { struct ax25_ctl_struct ax25_ctl; ax25_digi digi; ax25_dev *ax25_dev; ax25_cb *ax25; unsigned int k; int ret = 0; 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; if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL) 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) goto einval_put; } else { if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) goto einval_put; } ax25->window = ax25_ctl.arg; break; case AX25_T1: if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) goto einval_put; ax25->rtt = (ax25_ctl.arg * HZ) / 2; ax25->t1 = ax25_ctl.arg * HZ; break; case AX25_T2: if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) goto einval_put; ax25->t2 = ax25_ctl.arg * HZ; break; case AX25_N2: if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) goto einval_put; ax25->n2count = 0; ax25->n2 = ax25_ctl.arg; break; case AX25_T3: if (ax25_ctl.arg > ULONG_MAX / HZ) goto einval_put; ax25->t3 = ax25_ctl.arg * HZ; break; case AX25_IDLE: if (ax25_ctl.arg > ULONG_MAX / (60 * HZ)) goto einval_put; ax25->idle = ax25_ctl.arg * 60 * HZ; break; case AX25_PACLEN: if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) goto einval_put; ax25->paclen = ax25_ctl.arg; break; default: goto einval_put; } out_put: ax25_cb_put(ax25); return ret; einval_put: ret = -EINVAL; goto out_put; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)41578.90%1071.43%
Ralf Bächle468.75%17.14%
Jarek Poplawski448.37%17.14%
Roel Kluin203.80%17.14%
Al Viro10.19%17.14%
Total526100.00%14100.00%


static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev) { ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2; ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]); ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]); ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]); ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; ax25->idle = msecs_to_jiffies(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]; } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)15089.82%1493.33%
Ralf Bächle1710.18%16.67%
Total167100.00%15100.00%

/* * 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_fillin_cb_from_dev(ax25, ax25_dev); return; } /* * No device, use kernel / AX.25 spec default values */ ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2; ax25->t1 = msecs_to_jiffies(AX25_DEF_T1); ax25->t2 = msecs_to_jiffies(AX25_DEF_T2); ax25->t3 = msecs_to_jiffies(AX25_DEF_T3); ax25->n2 = AX25_DEF_N2; ax25->paclen = AX25_DEF_PACLEN; ax25->idle = msecs_to_jiffies(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; } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8562.50%990.00%
Ralf Bächle5137.50%110.00%
Total136100.00%10100.00%

/* * Create an empty AX.25 control block. */
ax25_cb *ax25_create_cb(void) { ax25_cb *ax25; if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL) return NULL; atomic_set(&ax25->refcount, 1); 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); ax25_setup_timers(ax25); ax25_fillin_cb(ax25, NULL); ax25->state = AX25_STATE_0; return ax25; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8587.63%457.14%
Jeroen Vreeken1010.31%114.29%
Jarek Poplawski11.03%114.29%
Ralf Bächle11.03%114.29%
Total97100.00%7100.00%

/* * 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 __user *optval, unsigned int optlen) { struct sock *sk = sock->sk; ax25_cb *ax25; struct net_device *dev; char devname[IFNAMSIZ]; unsigned long opt; int res = 0; if (level != SOL_AX25) return -ENOPROTOOPT; if (optlen < sizeof(unsigned int)) return -EINVAL; if (get_user(opt, (unsigned int __user *)optval)) return -EFAULT; lock_sock(sk); ax25 = sk_to_ax25(sk); switch (optname) { case AX25_WINDOW: if (ax25->modulus == AX25_MODULUS) { if (opt < 1 || opt > 7) { res = -EINVAL; break; } } else { if (opt < 1 || opt > 63) { res = -EINVAL; break; } } ax25->window = opt; break; case AX25_T1: if (opt < 1 || opt > ULONG_MAX / HZ) { res = -EINVAL; break; } ax25->rtt = (opt * HZ) >> 1; ax25->t1 = opt * HZ; break; case AX25_T2: if (opt < 1 || opt > ULONG_MAX / HZ) { res = -EINVAL; break; } ax25->t2 = opt * HZ; break; case AX25_N2: if (opt < 1 || opt > 31) { res = -EINVAL; break; } ax25->n2 = opt; break; case AX25_T3: if (opt < 1 || opt > ULONG_MAX / HZ) { res = -EINVAL; break; } ax25->t3 = opt * HZ; break; case AX25_IDLE: if (opt > ULONG_MAX / (60 * HZ)) { res = -EINVAL; break; } ax25->idle = opt * 60 * HZ; break; case AX25_BACKOFF: if (opt > 2) { res = -EINVAL; break; } ax25->backoff = opt; break; case AX25_EXTSEQ: ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; break; case AX25_PIDINCL: ax25->pidincl = opt ? 1 : 0; break; case AX25_IAMDIGI: ax25->iamdigi = opt ? 1 : 0; break; case AX25_PACLEN: if (opt < 16 || opt > 65535) { res = -EINVAL; break; } ax25->paclen = opt; break; case SO_BINDTODEVICE: if (optlen > IFNAMSIZ) optlen = IFNAMSIZ; if (copy_from_user(devname, optval, optlen)) { res = -EFAULT; break; } if (sk->sk_type == SOCK_SEQPACKET && (sock->state != SS_UNCONNECTED || sk->sk_state == TCP_LISTEN)) { res = -EADDRNOTAVAIL; break; } dev = dev_get_by_name(&init_net, devname); if (!dev) { res = -ENODEV; break; } ax25->ax25_dev = ax25_dev_ax25dev(dev); ax25_fillin_cb(ax25, ax25->ax25_dev); dev_put(dev); break; default: res = -ENOPROTOOPT; } release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)38868.55%1657.14%
Ralf Bächle15427.21%414.29%
Xi Wang91.59%13.57%
David S. Miller61.06%310.71%
Jeroen Vreeken30.53%13.57%
Arnaldo Carvalho de Melo20.35%13.57%
Eric Dumazet20.35%13.57%
Al Viro20.35%13.57%
Total566100.00%28100.00%


static int ax25_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { struct sock *sk = sock->sk; ax25_cb *ax25; 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)); lock_sock(sk); ax25 = sk_to_ax25(sk); switch (optname) { case AX25_WINDOW: val = ax25->window; break; case AX25_T1: val = ax25->t1 / HZ; break; case AX25_T2: val = ax25->t2 / HZ; break; case AX25_N2: val = ax25->n2; break; case AX25_T3: val = ax25->t3 / HZ; break; case AX25_IDLE: val = ax25->idle / (60 * HZ); break; case AX25_BACKOFF: val = ax25->backoff; break; case AX25_EXTSEQ: val = (ax25->modulus == AX25_EMODULUS); break; case AX25_PIDINCL: val = ax25->pidincl; break; case AX25_IAMDIGI: val = ax25->iamdigi; break; case AX25_PACLEN: val = ax25->paclen; break; case SO_BINDTODEVICE: ax25_dev = ax25->ax25_dev; if (ax25_dev != NULL && ax25_dev->dev != NULL) { strlcpy(devname, ax25_dev->dev->name, sizeof(devname)); length = strlen(devname) + 1; } else { *devname = '\0'; length = 1; } valptr = (void *) devname; break; default: release_sock(sk); return -ENOPROTOOPT; } release_sock(sk); if (put_user(length, optlen)) return -EFAULT; return copy_to_user(optval, valptr, length) ? -EFAULT : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)33389.04%1463.64%
Ralf Bächle215.61%29.09%
Benjamin Collins82.14%14.55%
Linus Torvalds51.34%29.09%
David S. Miller51.34%29.09%
Al Viro20.53%14.55%
Total374100.00%22100.00%


static int ax25_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; int res = 0; lock_sock(sk); if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) { sk->sk_max_ack_backlog = backlog; sk->sk_state = TCP_LISTEN; goto out; } res = -EOPNOTSUPP; out: release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5063.29%666.67%
Ralf Bächle2531.65%222.22%
Arnaldo Carvalho de Melo45.06%111.11%
Total79100.00%9100.00%

/* * XXX: when creating ax25_sock we should update the .obj_size setting * below. */ static struct proto ax25_proto = { .name = "AX25", .owner = THIS_MODULE, .obj_size = sizeof(struct ax25_sock), };
static int ax25_create(struct net *net, struct socket *sock, int protocol, int kern) { struct sock *sk; ax25_cb *ax25; if (protocol < 0 || protocol > SK_PROTOCOL_MAX) return -EINVAL; if (!net_eq(net, &init_net)) return -EAFNOSUPPORT; 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; break; #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; } sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern); if (sk == NULL) return -ENOMEM; ax25 = ax25_sk(sk)->cb = ax25_create_cb(); if (!ax25) { sk_free(sk); return -ENOMEM; } sock_init_data(sock, sk); sk->sk_destruct = ax25_free_sock; sock->ops = &ax25_proto_ops; sk->sk_protocol = protocol; ax25->sk = sk; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21877.58%1553.57%
Eric W. Biedermann196.76%27.14%
Hannes Frederic Sowa144.98%13.57%
David S. Miller113.91%27.14%
Octavian Purdila51.78%13.57%
Pavel Emelyanov41.42%13.57%
Arnaldo Carvalho de Melo41.42%27.14%
Eric Paris31.07%13.57%
Adrian Bunk10.36%13.57%
Alan Cox10.36%13.57%
Andrew Morton10.36%13.57%
Total281100.00%28100.00%


struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) { struct sock *sk; ax25_cb *ax25, *oax25; sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0); if (sk == NULL) return NULL; if ((ax25 = ax25_create_cb()) == NULL) { sk_free(sk); return NULL; } switch (osk->sk_type) { case SOCK_DGRAM: break; case SOCK_SEQPACKET: break; default: sk_free(sk); ax25_cb_put(ax25); return NULL; } sock_init_data(NULL, 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; sock_copy_flags(sk, osk); oax25 = sk_to_ax25(osk); ax25->modulus = oax25->modulus; ax25->backoff = oax25->backoff; ax25->pidincl = oax25->pidincl; ax25->iamdigi = oax25->iamdigi; ax25->rtt = oax25->rtt; ax25->t1 = oax25->t1; ax25->t2 = oax25->t2; ax25->t3 = oax25->t3; ax25->n2 = oax25->n2; ax25->idle = oax25->idle; ax25->paclen = oax25->paclen; ax25->window = oax25->window; ax25->ax25_dev = ax25_dev; ax25->source_addr = oax25->source_addr; if (oax25->digipeat != NULL) { ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi), GFP_ATOMIC); if (ax25->digipeat == NULL) { sk_free(sk); ax25_cb_put(ax25); return NULL; } } ax25_sk(sk)->cb = ax25; sk->sk_destruct = ax25_free_sock; ax25->sk = sk; return sk; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)27977.29%1852.94%
David S. Miller287.76%25.88%
Arnaldo Carvalho de Melo267.20%38.82%
Jarek Poplawski61.66%12.94%
Jeroen Vreeken61.66%25.88%
Pavel Emelyanov41.11%12.94%
Eric W. Biedermann41.11%25.88%
Hideaki Yoshifuji / 吉藤英明30.83%12.94%
Thomas Graf30.83%25.88%
Andrew Morton10.28%12.94%
Ralf Bächle10.28%12.94%
Total361100.00%34100.00%


static int ax25_release(struct socket *sock) { struct sock *sk = sock->sk; ax25_cb *ax25; if (sk == NULL) return 0; sock_hold(sk); sock_orphan(sk); lock_sock(sk); ax25 = sk_to_ax25(sk); if (sk->sk_type == SOCK_SEQPACKET) { switch (ax25->state) { case AX25_STATE_0: release_sock(sk); ax25_disconnect(ax25, 0); lock_sock(sk); ax25_destroy_socket(ax25); break; case AX25_STATE_1: case AX25_STATE_2: ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); release_sock(sk); ax25_disconnect(ax25, 0); lock_sock(sk); if (!sock_flag(ax25->sk, SOCK_DESTROY)) ax25_destroy_socket(ax25); break; case AX25_STATE_3: case AX25_STATE_4: ax25_clear_queues(ax25); ax25->n2count = 0; switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { case AX25_PROTO_STD_SIMPLEX: case AX25_PROTO_STD_DUPLEX: ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); ax25_stop_t2timer(ax25); ax25_stop_t3timer(ax25); ax25_stop_idletimer(ax25); break; #ifdef CONFIG_AX25_DAMA_SLAVE case AX25_PROTO_DAMA_SLAVE: ax25_stop_t3timer(ax25); ax25_stop_idletimer(ax25); break; #endif } ax25_calculate_t1(ax25); ax25_start_t1timer(ax25); ax25->state = AX25_STATE_2; sk->sk_state = TCP_CLOSE; sk->sk_shutdown |= SEND_SHUTDOWN; sk->sk_state_change(sk); sock_set_flag(sk, SOCK_DESTROY); break; default: break; } } else { sk->sk_state = TCP_CLOSE; sk->sk_shutdown |= SEND_SHUTDOWN; sk->sk_state_change(sk); ax25_destroy_socket(ax25); } sock->sk = NULL; release_sock(sk); sock_put(sk); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)22469.14%1760.71%
Jeroen Vreeken4814.81%27.14%
Basil Gunn123.70%13.57%
David S. Miller113.40%27.14%
Arnaldo Carvalho de Melo103.09%27.14%
Ralf Bächle103.09%27.14%
Stephen Hemminger72.16%13.57%
James Morris20.62%13.57%
Total324100.00%28100.00%

/* * 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_dev *ax25_dev = NULL; ax25_uid_assoc *user; ax25_address call; ax25_cb *ax25; int err = 0; if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) /* support for old structure may go away some time * ax25_bind(): uses old (6 digipeater) socket structure. */ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || (addr_len > sizeof(struct full_sockaddr_ax25))) return -EINVAL; if (addr->fsa_ax25.sax25_family != AF_AX25) return -EINVAL; user = ax25_findbyuid(current_euid()); if (user) { call = user->call; ax25_uid_put(user); } else { if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) return -EACCES; call = addr->fsa_ax25.sax25_call; } lock_sock(sk); ax25 = sk_to_ax25(sk); if (!sock_flag(sk, SOCK_ZAPPED)) { err = -EINVAL; goto out; } ax25->source_addr = call; /* * User already set interface with SO_BINDTODEVICE */ if (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) { err = -EADDRNOTAVAIL; goto out; } } else { if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) { err = -EADDRNOTAVAIL; goto out; } } if (ax25_dev != NULL) ax25_fillin_cb(ax25, ax25_dev); done: ax25_cb_add(ax25); sock_reset_flag(sk, SOCK_ZAPPED); out: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)25069.25%1356.52%
Ralf Bächle9426.04%313.04%
Thomas Graf102.77%14.35%
David Howells20.55%14.35%
Julia Lawall10.28%14.35%
Maximilian Attems10.28%14.35%
Arnaldo Carvalho de Melo10.28%14.35%
Jeroen Vreeken10.28%14.35%
David S. Miller10.28%14.35%
Total361100.00%23100.00%

/* * FIXME: nonblock behaviour looks like it may have a bug. */
static int __must_check ax25_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; ax25_cb *ax25 = sk_to_ax25(sk), *ax25t; struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; ax25_digi *digi = NULL; int ct = 0, err = 0; /* * 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 * ax25_connect(): uses obsolete socket structure */ ; else if (addr_len != sizeof(struct full_sockaddr_ax25)) /* support for old structure may go away some time * ax25_connect(): uses old (6 digipeater) socket structure. */ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || (addr_len > sizeof(struct full_sockaddr_ax25))) return -EINVAL; if (fsa->fsa_ax25.sax25_family != AF_AX25) return -EINVAL; lock_sock(sk); /* deal with restarts */ if (sock->state == SS_CONNECTING) { switch (sk->sk_state) { case TCP_SYN_SENT: /* still trying */ err = -EINPROGRESS; goto out_release; case TCP_ESTABLISHED: /* connection established */ sock->state = SS_CONNECTED; goto out_release; case TCP_CLOSE: /* connection refused */ sock->state = SS_UNCONNECTED; err = -ECONNREFUSED; goto out_release; } } if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) { err = -EISCONN; /* No reconnect on a seqpacket socket */ goto out_release; } sk->sk_state = TCP_CLOSE; sock->state = SS_UNCONNECTED; kfree(ax25->digipeat); 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) { err = -EINVAL; goto out_release; } if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) { err = -ENOBUFS; goto out_release; } 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) && 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 (sock_flag(sk, SOCK_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(ax25, &fsa->fsa_ax25.sax25_call)) < 0) { kfree(digi); goto out_release; } ax25_fillin_cb(ax25, ax25->ax25_dev); ax25_cb_add(ax25); } else { if (ax25->ax25_dev == NULL) { kfree(digi); err = -EHOSTUNREACH; goto out_release; } } if (sk->sk_type == SOCK_SEQPACKET && (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, ax25->ax25_dev->dev))) { kfree(digi); err = -EADDRINUSE; /* Already such a connection */ ax25_cb_put(ax25t); goto out_release; } ax25->dest_addr = fsa->fsa_ax25.sax25_call; ax25->digipeat = digi; /* First the easy one */ if (sk->sk_type != SOCK_SEQPACKET) { sock->state = SS_CONNECTED; sk->sk_state = TCP_ESTABLISHED; goto out_release; } /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ sock->state = SS_CONNECTING; sk->sk_state = TCP_SYN_SENT; switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { case AX25_PROTO_STD_SIMPLEX: case AX25_PROTO_STD_DUPLEX: ax25_std_establish_data_link(ax25); break; #ifdef CONFIG_AX25_DAMA_SLAVE case AX25_PROTO_DAMA_SLAVE: ax25->modulus = AX25_MODULUS; ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW]; if (ax25->ax25_dev->dama.slave) ax25_ds_establish_data_link(ax25); else ax25_std_establish_data_link(ax25); break; #endif } ax25->state = AX25_STATE_1; ax25_start_heartbeat(ax25); /* Now the loop */ if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { err = -EINPROGRESS; goto out_release; } if (sk->sk_state == TCP_SYN_SENT) { DEFINE_WAIT(wait); for (;;) { prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); if (sk->sk_state != TCP_SYN_SENT) break; if (!signal_pending(current)) { release_sock(sk); schedule(); lock_sock(sk); continue; } err = -ERESTARTSYS; break; } finish_wait(sk_sleep(sk), &wait); if (err) goto out_release; } if (sk->sk_state != TCP_ESTABLISHED) { /* Not in ABM, not in WAIT_UA -> failed */ sock->state = SS_UNCONNECTED; err = sock_error(sk); /* Always set at this point */ goto out_release; } sock->state = SS_CONNECTED; err = 0; out_release: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)60167.60%1858.06%
Ralf Bächle22024.75%516.13%
Jeroen Vreeken192.14%13.23%
Arnaldo Carvalho de Melo141.57%13.23%
Dave Jones121.35%13.23%
David S. Miller91.01%26.45%
Eric Dumazet60.67%13.23%
Thomas Graf50.56%13.23%
Maximilian Attems30.34%13.23%
Total889100.00%31100.00%


static int ax25_accept(struct socket *sock, struct socket *newsock, int flags, bool kern) { struct sk_buff *skb; struct sock *newsk; DEFINE_WAIT(wait); struct sock *sk; int err = 0; if (sock->state != SS_UNCONNECTED) return -EINVAL; if ((sk = sock->sk) == NULL) return -EINVAL; lock_sock(sk); if (sk->sk_type != SOCK_SEQPACKET) { err = -EOPNOTSUPP; goto out; } if (sk->sk_state != TCP_LISTEN) { err = -EINVAL; goto out; } /* * The read queue this time is holding sockets ready to use * hooked into the SABM we saved */ for (;;) { prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); skb = skb_dequeue(&sk->sk_receive_queue); if (skb) break; if (flags & O_NONBLOCK) { err = -EWOULDBLOCK; break; } if (!signal_pending(current)) { release_sock(sk); schedule(); lock_sock(sk); continue; } err = -ERESTARTSYS; break; } finish_wait(sk_sleep(sk), &wait); if (err) goto out; newsk = skb->sk; sock_graft(newsk, newsock); /* Now attach up the new socket */ kfree_skb(skb); sk->sk_ack_backlog--; newsock->state = SS_CONNECTED; out: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12850.39%847.06%
Ralf Bächle10340.55%317.65%
Eric Dumazet62.36%15.88%
Arnaldo Carvalho de Melo62.36%15.88%
David S. Miller41.57%15.88%
Jeroen Vreeken41.57%211.76%
David Howells31.18%15.88%
Total254100.00%17100.00%


static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; struct sock *sk = sock->sk; unsigned char ndigi, i; ax25_cb *ax25; int err = 0; memset(fsa, 0, sizeof(*fsa)); lock_sock(sk); ax25 = sk_to_ax25(sk); if (peer != 0) { if (sk->sk_state != TCP_ESTABLISHED) { err = -ENOTCONN; goto out; } fsa->fsa_ax25.sax25_family = AF_AX25; fsa->fsa_ax25.sax25_call = ax25->dest_addr; if (ax25->digipeat != NULL) { ndigi = ax25->digipeat->ndigi; fsa->fsa_ax25.sax25_ndigis = ndigi; for (i = 0; i < ndigi; i++) fsa->fsa_digipeater[i] = ax25->digipeat->calls[i]; } } else { fsa->fsa_ax25.sax25_family = AF_AX25; fsa->fsa_ax25.sax25_call = ax25->source_addr; fsa->fsa_ax25.sax25_ndigis = 1; if (ax25->ax25_dev != NULL) { memcpy(&fsa->fsa_digipeater[0], ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); } else { fsa->fsa_digipeater[0] = null_ax25_address; } } *uaddr_len = sizeof (struct full_sockaddr_ax25); out: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21478.10%960.00%
Ralf Bächle4516.42%213.33%
Vasiliy Kulikov124.38%16.67%
Arnaldo Carvalho de Melo10.36%16.67%
David S. Miller10.36%16.67%
Kees Cook10.36%16.67%
Total274100.00%15100.00%


static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) { DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name); struct sock *sk = sock->sk; struct sockaddr_ax25 sax; struct sk_buff *skb; ax25_digi dtmp, *dp; ax25_cb *ax25; size_t size; int lv, err, addr_len = msg->msg_namelen; if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) return -EINVAL; lock_sock(sk); ax25 = sk_to_ax25(sk); if (sock_flag(sk, SOCK_ZAPPED)) { err = -EADDRNOTAVAIL; goto out; } if (sk->sk_shutdown & SEND_SHUTDOWN) { send_sig(SIGPIPE, current, 0); err = -EPIPE; goto out; } if (ax25->ax25_dev == NULL) { err = -ENETUNREACH; goto out; } if (len > ax25->ax25_dev->dev->mtu) { err = -EMSGSIZE; goto out; } if (usax != NULL) { if (usax->sax25_family != AF_AX25) { err = -EINVAL; goto out; } if (addr_len == sizeof(struct sockaddr_ax25)) /* ax25_sendmsg(): uses obsolete socket structure */ ; else if (addr_len != sizeof(struct full_sockaddr_ax25)) /* support for old structure may go away some time * ax25_sendmsg(): uses old (6 digipeater) * socket structure. */ if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || (addr_len > sizeof(struct full_sockaddr_ax25))) { err = -EINVAL; goto out; } 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) { err = -EINVAL; goto out; } 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->sk_type == SOCK_SEQPACKET && ax25cmp(&ax25->dest_addr, &sax.sax25_call)) { err = -EISCONN; goto out; } 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->sk_state != TCP_ESTABLISHED) { err = -ENOTCONN; goto out; } sax.sax25_family = AF_AX25; sax.sax25_call = ax25->dest_addr; dp = ax25->digipeat; } /* Build a packet */ /* Assume the worst case */ size = len + ax25->ax25_dev->dev->hard_header_len; skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err); if (skb == NULL) goto out; skb_reserve(skb, size - len); /* User data follows immediately after the AX.25 data */ if (memcpy_from_msg(skb_put(skb, len), msg, len)) { err = -EFAULT; kfree_skb(skb); goto out; } skb_reset_network_header(skb); /* Add the PID if one is not supplied by the user in the skb */ if (!ax25->pidincl) *skb_push(skb, 1) = sk->sk_protocol; if (sk->sk_type == SOCK_SEQPACKET) { /* Connected mode sockets go via the LAPB machine */ if (sk->sk_state != TCP_ESTABLISHED) { kfree_skb(skb); err = -ENOTCONN; goto out; } /* Shove it onto the queue and kick */ ax25_output(ax25, ax25->paclen, skb); err = len; goto out; } skb_push(skb, 1 + ax25_addr_size(dp)); /* Building AX.25 Header */ /* Build an AX.25 header */ lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call, dp, AX25_COMMAND, AX25_MODULUS); skb_set_transport_header(skb, lv); *skb_transport_header(skb) = AX25_UI; /* Datagram frames go straight out of the door as UI */ ax25_queue_xmit(skb, ax25->ax25_dev->dev); err = len; out: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)50269.15%1645.71%
Ralf Bächle12717.49%38.57%
Stephen Hemminger263.58%12.86%
Arnaldo Carvalho de Melo253.44%514.29%
Chris Wright172.34%12.86%
Jeroen Vreeken70.96%12.86%
Steffen Hurrle70.96%12.86%
Thomas Graf50.69%12.86%
David S. Miller40.55%38.57%
Maximilian Attems30.41%12.86%
Olaf Hering20.28%12.86%
Al Viro10.14%12.86%
Total726100.00%35100.00%


static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int flags) { struct sock *sk = sock->sk; struct sk_buff *skb; int copied; int err = 0; lock_sock(sk); /* * This works for seqpacket too. The receiver has ordered the * queue for us! We do one quick check first though */ if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) { err = -ENOTCONN; goto out; } /* Now we can treat all alike */ skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &err); if (skb == NULL) goto out; if (!sk_to_ax25(sk)->pidincl) skb_pull(skb, 1); /* Remove PID */ skb_reset_transport_header(skb); copied = skb->len; if (copied > size) { copied = size; msg->msg_flags |= MSG_TRUNC; } skb_copy_datagram_msg(skb, 0, msg, copied); if (msg->msg_name) { ax25_digi digi; ax25_address src; const unsigned char *mac = skb_mac_header(skb); DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name); memset(sax, 0, sizeof(struct full_sockaddr_ax25)); ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL, &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 = src; 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); err = copied; out: release_sock(sk); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)24871.88%939.13%
Ralf Bächle4312.46%28.70%
Arnaldo Carvalho de Melo164.64%313.04%
Mathias Krause133.77%14.35%
Steffen Hurrle82.32%14.35%
Hannes Frederic Sowa61.74%14.35%
Jeroen Vreeken51.45%14.35%
David S. Miller51.45%417.39%
Stephen Hemminger10.29%14.35%
Total345100.00%23100.00%


static int ax25_shutdown(struct socket *sk, int how) { /* FIXME - generate DM and RNR states */ return -EOPNOTSUPP; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19100.00%2100.00%
Total19100.00%2100.00%


static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; void __user *argp = (void __user *)arg; int res = 0; lock_sock(sk); switch (cmd) { case TIOCOUTQ: { long amount; amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); if (amount < 0) amount = 0; res = put_user(amount, (int __user *)argp); break; } 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->sk_receive_queue)) != NULL) amount = skb->len; res = put_user(amount, (int __user *) argp); break; } case SIOCGSTAMP: res = sock_get_timestamp(sk, argp); break; case SIOCGSTAMPNS: res = sock_get_timestampns(sk, argp); break; 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, argp, sizeof(sax25))) { res = -EFAULT; break; } res = ax25_uid_ioctl(cmd, &sax25); break; } case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ long amount; if (!capable(CAP_NET_ADMIN)) { res = -EPERM; break; } if (get_user(amount, (long __user *)argp)) { res = -EFAULT; break; } if (amount < 0 || amount > AX25_NOUID_BLOCK) { res = -EINVAL; break; } ax25_uid_policy = amount; res = 0; break; } case SIOCADDRT: case SIOCDELRT: case SIOCAX25OPTRT: if (!capable(CAP_NET_ADMIN)) { res = -EPERM; break; } res = ax25_rt_ioctl(cmd, argp); break; case SIOCAX25CTLCON: if (!capable(CAP_NET_ADMIN)) { res = -EPERM; break; } res = ax25_ctl_ioctl(cmd, argp); break; case SIOCAX25GETINFO: case SIOCAX25GETINFOOLD: { ax25_cb *ax25 = sk_to_ax25(sk); struct ax25_info_struct ax25_info; ax25_info.t1 = ax25->t1 / HZ; ax25_info.t2 = ax25->t2 / HZ; ax25_info.t3 = ax25->t3 / HZ; ax25_info.idle = ax25->idle / (60 * HZ); ax25_info.n2 = ax25->n2; ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ; ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ; ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ; ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ); ax25_info.n2count = ax25->n2count; ax25_info.state = ax25->state; ax25_info.rcv_q = sk_rmem_alloc_get(sk); ax25_info.snd_q = sk_wmem_alloc_get(sk); ax25_info.vs = ax25->vs; ax25_info.vr = ax25->vr; ax25_info.va = ax25->va; ax25_info.vs_max = ax25->vs; /* reserved */ ax25_info.paclen = ax25->paclen; ax25_info.window = 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(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) { res = -EFAULT; break; } } else { if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) { res = -EINVAL; break; } } res = 0; break; } case SIOCAX25ADDFWD: case SIOCAX25DELFWD: { struct ax25_fwd_struct ax25_fwd; if (!capable(CAP_NET_ADMIN)) { res = -EPERM; break; } if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) { res = -EFAULT; break; } res = ax25_fwd_ioctl(cmd, &ax25_fwd); break; } case SIOCGIFADDR: case SIOCSIFADDR: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCGIFMETRIC: case SIOCSIFMETRIC: res = -EINVAL; break; default: res = -ENOIOCTLCMD; break; } release_sock(sk); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)60776.93%1246.15%
Ralf Bächle12015.21%27.69%
Al Viro253.17%13.85%
Eric Dumazet162.03%311.54%
David S. Miller91.14%27.69%
Dan Carpenter40.51%13.85%
Jeroen Vreeken20.25%13.85%
Arnaldo Carvalho de Melo20.25%13.85%
Christoph Hellwig20.25%13.85%
Andi Kleen10.13%13.85%
Randy Dunlap10.13%13.85%
Total789100.00%26100.00%

#ifdef CONFIG_PROC_FS
static void *ax25_info_start(struct seq_file *seq, loff_t *pos) __acquires (ax25_list_lock) { spin_lock_bh(&ax25_list_lock); return seq_hlist_start(&ax25_list, *pos); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger1233.33%112.50%
Linus Torvalds (pre-git)822.22%225.00%
Li Zefan513.89%112.50%
Ralf Bächle513.89%225.00%
Eric Dumazet411.11%112.50%
Jeroen Vreeken25.56%112.50%
Total36100.00%8100.00%


static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos) { return seq_hlist_next(v, &ax25_list, pos); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger2683.87%133.33%
Li Zefan412.90%133.33%
Linus Torvalds (pre-git)13.23%133.33%
Total31100.00%3100.00%


static void ax25_info_stop(struct seq_file *seq, void *v) __releases (ax25_list_lock) { spin_unlock_bh(&ax25_list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger2184.00%150.00%
Eric Dumazet416.00%150.00%
Total25100.00%2100.00%


static int ax25_info_show(struct seq_file *seq, void *v) { ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node); char buf[11]; int k; /* * 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 */ seq_printf(seq, "%8.8lx %s %s%s ", (long) ax25, ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, ax2asc(buf, &ax25->source_addr), ax25->iamdigi? "*":""); seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr)); for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { seq_printf(seq, ",%s%s", ax2asc(buf, &ax25->digipeat->calls[k]), ax25->digipeat->repeated[k]? "*":""); } seq_printf(seq, " %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) { seq_printf(seq, " %d %d %lu\n", sk_wmem_alloc_get(ax25->sk), sk_rmem_alloc_get(ax25->sk), sock_i_ino(ax25->sk)); } else { seq_puts(seq, " * * *\n"); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)26880.24%1161.11%
Stephen Hemminger3911.68%15.56%
Ralf Bächle123.59%15.56%
Li Zefan82.40%15.56%
Jarek Poplawski20.60%15.56%
Jeroen Vreeken20.60%15.56%
Eric Dumazet20.60%15.56%
Al Viro10.30%15.56%
Total334100.00%18100.00%

static const struct seq_operations ax25_info_seqops = { .start = ax25_info_start, .next = ax25_info_next, .stop = ax25_info_stop, .show = ax25_info_show, };
static int ax25_info_open(struct inode *inode, struct file *file) { return seq_open(file, &ax25_info_seqops); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger2288.00%133.33%
Linus Torvalds (pre-git)312.00%266.67%
Total25100.00%3100.00%

static const struct file_operations ax25_info_fops = { .owner = THIS_MODULE, .open = ax25_info_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; #endif static const struct net_proto_family ax25_family_ops = { .family = PF_AX25, .create = ax25_create, .owner = THIS_MODULE, }; static const struct proto_ops ax25_proto_ops = { .family = PF_AX25, .owner = THIS_MODULE, .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, }; /* * Called by socket.c on kernel start up */ static struct packet_type ax25_packet_type __read_mostly = { .type = cpu_to_be16(ETH_P_AX25), .func = ax25_kiss_rcv, }; static struct notifier_block ax25_dev_notifier = { .notifier_call = ax25_device_event, };
static int __init ax25_init(void) { int rc = proto_register(&ax25_proto, 0); if (rc != 0) goto out; sock_register(&ax25_family_ops); dev_add_pack(&ax25_packet_type); register_netdevice_notifier(&ax25_dev_notifier); proc_create("ax25_route", S_IRUGO, init_net.proc_net, &ax25_route_fops); proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops); proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops); out: return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4750.00%1178.57%
Arnaldo Carvalho de Melo2324.47%17.14%
Gao Feng1515.96%17.14%
Stephen Hemminger99.57%17.14%
Total94100.00%14100.00%

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"); MODULE_ALIAS_NETPROTO(PF_AX25);
static void __exit ax25_exit(void) { remove_proc_entry("ax25_route", init_net.proc_net); remove_proc_entry("ax25", init_net.proc_net); remove_proc_entry("ax25_calls", init_net.proc_net); unregister_netdevice_notifier(&ax25_dev_notifier); dev_remove_pack(&ax25_packet_type); sock_unregister(PF_AX25); proto_unregister(&ax25_proto); ax25_rt_free(); ax25_uid_free(); ax25_dev_free(); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3855.88%457.14%
Gao Feng1522.06%114.29%
Eric W. Biedermann913.24%114.29%
Arnaldo Carvalho de Melo68.82%114.29%
Total68100.00%7100.00%

module_exit(ax25_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)607069.27%7035.35%
Ralf Bächle125514.32%2311.62%
Jeroen Vreeken2983.40%31.52%
Stephen Hemminger2262.58%52.53%
Arnaldo Carvalho de Melo1882.15%136.57%
David S. Miller1231.40%84.04%
Jarek Poplawski710.81%52.53%
Alan Cox660.75%21.01%
Eric W. Biedermann440.50%52.53%
Eric Dumazet430.49%73.54%
Rusty Russell330.38%21.01%
Al Viro320.37%42.02%
Gao Feng300.34%21.01%
Thomas Graf230.26%21.01%
Hannes Frederic Sowa200.23%21.01%
Roel Kluin200.23%10.51%
Dave Jones170.19%21.01%
Li Zefan170.19%10.51%
Pavel Emelyanov170.19%21.01%
Chris Wright170.19%10.51%
Linus Torvalds160.18%42.02%
Steffen Hurrle150.17%10.51%
Mathias Krause130.15%10.51%
Basil Gunn120.14%10.51%
Vasiliy Kulikov120.14%10.51%
Hideaki Yoshifuji / 吉藤英明110.13%31.52%
Xi Wang90.10%10.51%
Benjamin Collins80.09%10.51%
Maximilian Attems70.08%21.01%
David Howells50.06%21.01%
Octavian Purdila50.06%10.51%
Randy Dunlap40.05%21.01%
James Morris40.05%10.51%
Dan Carpenter40.05%10.51%
Thomas Gleixner40.05%10.51%
Jiri Pirko30.03%10.51%
Tejun Heo30.03%10.51%
Eric Paris30.03%10.51%
Christoph Hellwig20.02%10.51%
Olaf Hering20.02%10.51%
Andrew Morton20.02%10.51%
Ingo Molnar10.01%10.51%
Kees Cook10.01%10.51%
Andi Kleen10.01%10.51%
Harvey Harrison10.01%10.51%
Arjan van de Ven10.01%10.51%
Julia Lawall10.01%10.51%
Philippe De Muyter10.01%10.51%
Adrian Bunk10.01%10.51%
Joe Perches10.01%10.51%
Total8763100.00%198100.00%
Directory: net/ax25
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