| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds (pre-git) | 5521 | 65.73% | 89 | 41.59% |
| Arnaldo Carvalho de Melo | 692 | 8.24% | 18 | 8.41% |
| Stephen Hemminger | 383 | 4.56% | 7 | 3.27% |
| Arnd Bergmann | 331 | 3.94% | 8 | 3.74% |
| Christoph Hellwig | 293 | 3.49% | 3 | 1.40% |
| David S. Miller | 221 | 2.63% | 12 | 5.61% |
| Linus Torvalds | 201 | 2.39% | 6 | 2.80% |
| Al Viro | 100 | 1.19% | 4 | 1.87% |
| Doug Brown | 83 | 0.99% | 1 | 0.47% |
| Yue haibing | 82 | 0.98% | 3 | 1.40% |
| Eric W. Biedermann | 51 | 0.61% | 6 | 2.80% |
| Vincent Duvert | 40 | 0.48% | 1 | 0.47% |
| Thomas Graf | 35 | 0.42% | 1 | 0.47% |
| Hideaki Yoshifuji / 吉藤英明 | 29 | 0.35% | 3 | 1.40% |
| Jean Delvare | 27 | 0.32% | 1 | 0.47% |
| Eric Dumazet | 27 | 0.32% | 6 | 2.80% |
| Ori Nimron | 25 | 0.30% | 1 | 0.47% |
| Oliver Dawid | 24 | 0.29% | 1 | 0.47% |
| Rusty Russell | 21 | 0.25% | 2 | 0.93% |
| Petr Vandrovec | 19 | 0.23% | 1 | 0.47% |
| Hyunwoo Kim | 18 | 0.21% | 1 | 0.47% |
| Steffen Hurrle | 15 | 0.18% | 1 | 0.47% |
| Christopher Leech | 15 | 0.18% | 1 | 0.47% |
| Kees Cook | 14 | 0.17% | 1 | 0.47% |
| Mark Smith | 14 | 0.17% | 2 | 0.93% |
| Thomas Gleixner | 14 | 0.17% | 2 | 0.93% |
| Joe Perches | 13 | 0.15% | 2 | 0.93% |
| Hannes Frederic Sowa | 8 | 0.10% | 1 | 0.47% |
| Denis Kirjanov | 8 | 0.10% | 1 | 0.47% |
| Denys Vlasenko | 8 | 0.10% | 1 | 0.47% |
| James Morris | 6 | 0.07% | 1 | 0.47% |
| Herbert Xu | 5 | 0.06% | 1 | 0.47% |
| Octavian Purdila | 5 | 0.06% | 1 | 0.47% |
| Jiri Pirko | 4 | 0.05% | 2 | 0.93% |
| Olaf Hering | 4 | 0.05% | 1 | 0.47% |
| Stephen Rothwell | 4 | 0.05% | 2 | 0.93% |
| Ilpo Järvinen | 4 | 0.05% | 1 | 0.47% |
| Alexey Dobriyan | 3 | 0.04% | 2 | 0.93% |
| Pavel Emelyanov | 3 | 0.04% | 1 | 0.47% |
| Adrian Bunk | 3 | 0.04% | 1 | 0.47% |
| Randy Dunlap | 3 | 0.04% | 1 | 0.47% |
| Jonathan Lemon | 3 | 0.04% | 1 | 0.47% |
| Eric Paris | 3 | 0.04% | 1 | 0.47% |
| gushengxian | 3 | 0.04% | 1 | 0.47% |
| Dave Jones | 2 | 0.02% | 1 | 0.47% |
| Alan Cox | 2 | 0.02% | 2 | 0.93% |
| Panagiotis Issaris | 2 | 0.02% | 1 | 0.47% |
| Ben Hutchings | 2 | 0.02% | 1 | 0.47% |
| Harvey Harrison | 2 | 0.02% | 1 | 0.47% |
| Tom Herbert | 1 | 0.01% | 1 | 0.47% |
| Andries E. Brouwer | 1 | 0.01% | 1 | 0.47% |
| Anton Protopopov | 1 | 0.01% | 1 | 0.47% |
| Andrew Lunn | 1 | 0.01% | 1 | 0.47% |
| Total | 8399 | 214 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * DDP: An implementation of the AppleTalk DDP protocol for * Ethernet 'ELAP'. * * Alan Cox <alan@lxorguk.ukuu.org.uk> * * With more than a little assistance from * * Wesley Craig <netatalk@umich.edu> * * Fixes: * Neil Horman : Added missing device ioctls * Michael Callahan : Made routing work * Wesley Craig : Fix probing to listen to a * passed node id. * Alan Cox : Added send/recvmsg support * Alan Cox : Moved at. to protinfo in * socket. * Alan Cox : Added firewall hooks. * Alan Cox : Supports new ARPHRD_LOOPBACK * Christer Weinigel : Routing and /proc fixes. * Bradford Johnson : LocalTalk. * Tom Dyas : Module support. * Alan Cox : Hooks for PPP (based on the * LocalTalk hook). * Alan Cox : Posix bits * Alan Cox/Mike Freeman : Possible fix to NBP problems * Bradford Johnson : IP-over-DDP (experimental) * Jay Schulist : Moved IP-over-DDP to its own * driver file. (ipddp.c & ipddp.h) * Jay Schulist : Made work as module with * AppleTalk drivers, cleaned it. * Rob Newberry : Added proxy AARP and AARP * procfs, moved probing to AARP * module. * Adrian Sun/ * Michael Zuelsdorff : fix for net.0 packets. don't * allow illegal ether/tokentalk * port assignment. we lose a * valid localtalk port as a * result. * Arnaldo C. de Melo : Cleanup, in preparation for * shared skb support 8) * Arnaldo C. de Melo : Move proc stuff to atalk_proc.c, * use seq_file */ #include <linux/capability.h> #include <linux/module.h> #include <linux/if_arp.h> #include <linux/termios.h> /* For TIOCOUTQ/INQ */ #include <linux/compat.h> #include <linux/slab.h> #include <net/datalink.h> #include <net/psnap.h> #include <net/sock.h> #include <net/tcp_states.h> #include <net/route.h> #include <net/compat.h> #include <linux/atalk.h> #include <linux/highmem.h> struct datalink_proto *ddp_dl, *aarp_dl; static const struct proto_ops atalk_dgram_ops; /**************************************************************************\ * * * Handlers for the socket list. * * * \**************************************************************************/ HLIST_HEAD(atalk_sockets); DEFINE_RWLOCK(atalk_sockets_lock); static inline void __atalk_insert_socket(struct sock *sk) { sk_add_node(sk, &atalk_sockets); } static inline void atalk_remove_socket(struct sock *sk) { write_lock_bh(&atalk_sockets_lock); sk_del_node_init(sk); write_unlock_bh(&atalk_sockets_lock); } static struct sock *atalk_search_socket(struct sockaddr_at *to, struct atalk_iface *atif) { struct sock *def_socket = NULL; struct sock *s; read_lock_bh(&atalk_sockets_lock); sk_for_each(s, &atalk_sockets) { struct atalk_sock *at = at_sk(s); if (to->sat_port != at->src_port) continue; if (to->sat_addr.s_net == ATADDR_ANYNET && to->sat_addr.s_node == ATADDR_BCAST) { if (atif->address.s_node == at->src_node && atif->address.s_net == at->src_net) { /* This socket's address matches the address of the interface * that received the packet -- use it */ goto found; } /* Continue searching for a socket matching the interface address, * but use this socket by default if no other one is found */ def_socket = s; } if (to->sat_addr.s_net == at->src_net && (to->sat_addr.s_node == at->src_node || to->sat_addr.s_node == ATADDR_BCAST || to->sat_addr.s_node == ATADDR_ANYNODE)) goto found; /* XXXX.0 -- we got a request for this router. make sure * that the node is appropriately set. */ if (to->sat_addr.s_node == ATADDR_ANYNODE && to->sat_addr.s_net != ATADDR_ANYNET && atif->address.s_node == at->src_node) { to->sat_addr.s_node = atif->address.s_node; goto found; } } s = def_socket; found: read_unlock_bh(&atalk_sockets_lock); return s; } /** * atalk_find_or_insert_socket - Try to find a socket matching ADDR * @sk: socket to insert in the list if it is not there already * @sat: address to search for * * Try to find a socket matching ADDR in the socket list, if found then return * it. If not, insert SK into the socket list. * * This entire operation must execute atomically. */ static struct sock *atalk_find_or_insert_socket(struct sock *sk, struct sockaddr_at *sat) { struct sock *s; struct atalk_sock *at; write_lock_bh(&atalk_sockets_lock); sk_for_each(s, &atalk_sockets) { at = at_sk(s); if (at->src_net == sat->sat_addr.s_net && at->src_node == sat->sat_addr.s_node && at->src_port == sat->sat_port) goto found; } s = NULL; __atalk_insert_socket(sk); /* Wheee, it's free, assign and insert. */ found: write_unlock_bh(&atalk_sockets_lock); return s; } static void atalk_destroy_timer(struct timer_list *t) { struct sock *sk = from_timer(sk, t, sk_timer); if (sk_has_allocations(sk)) { sk->sk_timer.expires = jiffies + SOCK_DESTROY_TIME; add_timer(&sk->sk_timer); } else sock_put(sk); } static inline void atalk_destroy_socket(struct sock *sk) { atalk_remove_socket(sk); skb_queue_purge(&sk->sk_receive_queue); if (sk_has_allocations(sk)) { timer_setup(&sk->sk_timer, atalk_destroy_timer, 0); sk->sk_timer.expires = jiffies + SOCK_DESTROY_TIME; add_timer(&sk->sk_timer); } else sock_put(sk); } /**************************************************************************\ * * * Routing tables for the AppleTalk socket layer. * * * \**************************************************************************/ /* Anti-deadlock ordering is atalk_routes_lock --> iface_lock -DaveM */ struct atalk_route *atalk_routes; DEFINE_RWLOCK(atalk_routes_lock); struct atalk_iface *atalk_interfaces; DEFINE_RWLOCK(atalk_interfaces_lock); /* For probing devices or in a routerless network */ struct atalk_route atrtr_default; /* AppleTalk interface control */ /* * Drop a device. Doesn't drop any of its routes - that is the caller's * problem. Called when we down the interface or delete the address. */ static void atif_drop_device(struct net_device *dev) { struct atalk_iface **iface = &atalk_interfaces; struct atalk_iface *tmp; write_lock_bh(&atalk_interfaces_lock); while ((tmp = *iface) != NULL) { if (tmp->dev == dev) { *iface = tmp->next; dev_put(dev); kfree(tmp); dev->atalk_ptr = NULL; } else iface = &tmp->next; } write_unlock_bh(&atalk_interfaces_lock); } static struct atalk_iface *atif_add_device(struct net_device *dev, struct atalk_addr *sa) { struct atalk_iface *iface = kzalloc(sizeof(*iface), GFP_KERNEL); if (!iface) goto out; dev_hold(dev); iface->dev = dev; dev->atalk_ptr = iface; iface->address = *sa; iface->status = 0; write_lock_bh(&atalk_interfaces_lock); iface->next = atalk_interfaces; atalk_interfaces = iface; write_unlock_bh(&atalk_interfaces_lock); out: return iface; } /* Perform phase 2 AARP probing on our tentative address */ static int atif_probe_device(struct atalk_iface *atif) { int netrange = ntohs(atif->nets.nr_lastnet) - ntohs(atif->nets.nr_firstnet) + 1; int probe_net = ntohs(atif->address.s_net); int probe_node = atif->address.s_node; int netct, nodect; /* Offset the network we start probing with */ if (probe_net == ATADDR_ANYNET) { probe_net = ntohs(atif->nets.nr_firstnet); if (netrange) probe_net += jiffies % netrange; } if (probe_node == ATADDR_ANYNODE) probe_node = jiffies & 0xFF; /* Scan the networks */ atif->status |= ATIF_PROBE; for (netct = 0; netct <= netrange; netct++) { /* Sweep the available nodes from a given start */ atif->address.s_net = htons(probe_net); for (nodect = 0; nodect < 256; nodect++) { atif->address.s_node = (nodect + probe_node) & 0xFF; if (atif->address.s_node > 0 && atif->address.s_node < 254) { /* Probe a proposed address */ aarp_probe_network(atif); if (!(atif->status & ATIF_PROBE_FAIL)) { atif->status &= ~ATIF_PROBE; return 0; } } atif->status &= ~ATIF_PROBE_FAIL; } probe_net++; if (probe_net > ntohs(atif->nets.nr_lastnet)) probe_net = ntohs(atif->nets.nr_firstnet); } atif->status &= ~ATIF_PROBE; return -EADDRINUSE; /* Network is full... */ } /* Perform AARP probing for a proxy address */ static int atif_proxy_probe_device(struct atalk_iface *atif, struct atalk_addr *proxy_addr) { int netrange = ntohs(atif->nets.nr_lastnet) - ntohs(atif->nets.nr_firstnet) + 1; /* we probe the interface's network */ int probe_net = ntohs(atif->address.s_net); int probe_node = ATADDR_ANYNODE; /* we'll take anything */ int netct, nodect; /* Offset the network we start probing with */ if (probe_net == ATADDR_ANYNET) { probe_net = ntohs(atif->nets.nr_firstnet); if (netrange) probe_net += jiffies % netrange; } if (probe_node == ATADDR_ANYNODE) probe_node = jiffies & 0xFF; /* Scan the networks */ for (netct = 0; netct <= netrange; netct++) { /* Sweep the available nodes from a given start */ proxy_addr->s_net = htons(probe_net); for (nodect = 0; nodect < 256; nodect++) { proxy_addr->s_node = (nodect + probe_node) & 0xFF; if (proxy_addr->s_node > 0 && proxy_addr->s_node < 254) { /* Tell AARP to probe a proposed address */ int ret = aarp_proxy_probe_network(atif, proxy_addr); if (ret != -EADDRINUSE) return ret; } } probe_net++; if (probe_net > ntohs(atif->nets.nr_lastnet)) probe_net = ntohs(atif->nets.nr_firstnet); } return -EADDRINUSE; /* Network is full... */ } struct atalk_addr *atalk_find_dev_addr(struct net_device *dev) { struct atalk_iface *iface = dev->atalk_ptr; return iface ? &iface->address : NULL; } static struct atalk_addr *atalk_find_primary(void) { struct atalk_iface *fiface = NULL; struct atalk_addr *retval; struct atalk_iface *iface; /* * Return a point-to-point interface only if * there is no non-ptp interface available. */ read_lock_bh(&atalk_interfaces_lock); for (iface = atalk_interfaces; iface; iface = iface->next) { if (!fiface && !(iface->dev->flags & IFF_LOOPBACK)) fiface = iface; if (!(iface->dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))) { retval = &iface->address; goto out; } } if (fiface) retval = &fiface->address; else if (atalk_interfaces) retval = &atalk_interfaces->address; else retval = NULL; out: read_unlock_bh(&atalk_interfaces_lock); return retval; } /* * Find a match for 'any network' - ie any of our interfaces with that * node number will do just nicely. */ static struct atalk_iface *atalk_find_anynet(int node, struct net_device *dev) { struct atalk_iface *iface = dev->atalk_ptr; if (!iface || iface->status & ATIF_PROBE) goto out_err; if (node != ATADDR_BCAST && iface->address.s_node != node && node != ATADDR_ANYNODE) goto out_err; out: return iface; out_err: iface = NULL; goto out; } /* Find a match for a specific network:node pair */ static struct atalk_iface *atalk_find_interface(__be16 net, int node) { struct atalk_iface *iface; read_lock_bh(&atalk_interfaces_lock); for (iface = atalk_interfaces; iface; iface = iface->next) { if ((node == ATADDR_BCAST || node == ATADDR_ANYNODE || iface->address.s_node == node) && iface->address.s_net == net && !(iface->status & ATIF_PROBE)) break; /* XXXX.0 -- net.0 returns the iface associated with net */ if (node == ATADDR_ANYNODE && net != ATADDR_ANYNET && ntohs(iface->nets.nr_firstnet) <= ntohs(net) && ntohs(net) <= ntohs(iface->nets.nr_lastnet)) break; } read_unlock_bh(&atalk_interfaces_lock); return iface; } /* * Find a route for an AppleTalk packet. This ought to get cached in * the socket (later on...). We know about host routes and the fact * that a route must be direct to broadcast. */ static struct atalk_route *atrtr_find(struct atalk_addr *target) { /* * we must search through all routes unless we find a * host route, because some host routes might overlap * network routes */ struct atalk_route *net_route = NULL; struct atalk_route *r; read_lock_bh(&atalk_routes_lock); for (r = atalk_routes; r; r = r->next) { if (!(r->flags & RTF_UP)) continue; if (r->target.s_net == target->s_net) { if (r->flags & RTF_HOST) { /* * if this host route is for the target, * the we're done */ if (r->target.s_node == target->s_node) goto out; } else /* * this route will work if there isn't a * direct host route, so cache it */ net_route = r; } } /* * if we found a network route but not a direct host * route, then return it */ if (net_route) r = net_route; else if (atrtr_default.dev) r = &atrtr_default; else /* No route can be found */ r = NULL; out: read_unlock_bh(&atalk_routes_lock); return r; } /* * Given an AppleTalk network, find the device to use. This can be * a simple lookup. */ struct net_device *atrtr_get_dev(struct atalk_addr *sa) { struct atalk_route *atr = atrtr_find(sa); return atr ? atr->dev : NULL; } /* Set up a default router */ static void atrtr_set_default(struct net_device *dev) { atrtr_default.dev = dev; atrtr_default.flags = RTF_UP; atrtr_default.gateway.s_net = htons(0); atrtr_default.gateway.s_node = 0; } /* * Add a router. Basically make sure it looks valid and stuff the * entry in the list. While it uses netranges we always set them to one * entry to work like netatalk. */ static int atrtr_create(struct rtentry *r, struct net_device *devhint) { struct sockaddr_at *ta = (struct sockaddr_at *)&r->rt_dst; struct sockaddr_at *ga = (struct sockaddr_at *)&r->rt_gateway; struct atalk_route *rt; struct atalk_iface *iface, *riface; int retval = -EINVAL; /* * Fixme: Raise/Lower a routing change semaphore for these * operations. */ /* Validate the request */ if (ta->sat_family != AF_APPLETALK || (!devhint && ga->sat_family != AF_APPLETALK)) goto out; /* Now walk the routing table and make our decisions */ write_lock_bh(&atalk_routes_lock); for (rt = atalk_routes; rt; rt = rt->next) { if (r->rt_flags != rt->flags) continue; if (ta->sat_addr.s_net == rt->target.s_net) { if (!(rt->flags & RTF_HOST)) break; if (ta->sat_addr.s_node == rt->target.s_node) break; } } if (!devhint) { riface = NULL; read_lock_bh(&atalk_interfaces_lock); for (iface = atalk_interfaces; iface; iface = iface->next) { if (!riface && ntohs(ga->sat_addr.s_net) >= ntohs(iface->nets.nr_firstnet) && ntohs(ga->sat_addr.s_net) <= ntohs(iface->nets.nr_lastnet)) riface = iface; if (ga->sat_addr.s_net == iface->address.s_net && ga->sat_addr.s_node == iface->address.s_node) riface = iface; } read_unlock_bh(&atalk_interfaces_lock); retval = -ENETUNREACH; if (!riface) goto out_unlock; devhint = riface->dev; } if (!rt) { rt = kzalloc(sizeof(*rt), GFP_ATOMIC); retval = -ENOBUFS; if (!rt) goto out_unlock; rt->next = atalk_routes; atalk_routes = rt; } /* Fill in the routing entry */ rt->target = ta->sat_addr; dev_hold(devhint); rt->dev = devhint; rt->flags = r->rt_flags; rt->gateway = ga->sat_addr; retval = 0; out_unlock: write_unlock_bh(&atalk_routes_lock); out: return retval; } /* Delete a route. Find it and discard it */ static int atrtr_delete(struct atalk_addr *addr) { struct atalk_route **r = &atalk_routes; int retval = 0; struct atalk_route *tmp; write_lock_bh(&atalk_routes_lock); while ((tmp = *r) != NULL) { if (tmp->target.s_net == addr->s_net && (!(tmp->flags&RTF_GATEWAY) || tmp->target.s_node == addr->s_node)) { *r = tmp->next; dev_put(tmp->dev); kfree(tmp); goto out; } r = &tmp->next; } retval = -ENOENT; out: write_unlock_bh(&atalk_routes_lock); return retval; } /* * Called when a device is downed. Just throw away any routes * via it. */ static void atrtr_device_down(struct net_device *dev) { struct atalk_route **r = &atalk_routes; struct atalk_route *tmp; write_lock_bh(&atalk_routes_lock); while ((tmp = *r) != NULL) { if (tmp->dev == dev) { *r = tmp->next; dev_put(dev); kfree(tmp); } else r = &tmp->next; } write_unlock_bh(&atalk_routes_lock); if (atrtr_default.dev == dev) atrtr_set_default(NULL); } /* Actually down the interface */ static inline void atalk_dev_down(struct net_device *dev) { atrtr_device_down(dev); /* Remove all routes for the device */ aarp_device_down(dev); /* Remove AARP entries for the device */ atif_drop_device(dev); /* Remove the device */ } /* * A device event has occurred. Watch for devices going down and * delete our use of them (iface and route). */ static int ddp_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; if (event == NETDEV_DOWN) /* Discard any use of this */ atalk_dev_down(dev); return NOTIFY_DONE; } /* ioctl calls. Shouldn't even need touching */ /* Device configuration ioctl calls */ static int atif_ioctl(int cmd, void __user *arg) { static char aarp_mcast[6] = { 0x09, 0x00, 0x00, 0xFF, 0xFF, 0xFF }; struct ifreq atreq; struct atalk_netrange *nr; struct sockaddr_at *sa; struct net_device *dev; struct atalk_iface *atif; int ct; int limit; struct rtentry rtdef; int add_route; if (get_user_ifreq(&atreq, NULL, arg)) return -EFAULT; dev = __dev_get_by_name(&init_net, atreq.ifr_name); if (!dev) return -ENODEV; sa = (struct sockaddr_at *)&atreq.ifr_addr; atif = atalk_find_dev(dev); switch (cmd) { case SIOCSIFADDR: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (sa->sat_family != AF_APPLETALK) return -EINVAL; if (dev->type != ARPHRD_ETHER && dev->type != ARPHRD_LOOPBACK && dev->type != ARPHRD_LOCALTLK && dev->type != ARPHRD_PPP) return -EPROTONOSUPPORT; nr = (struct atalk_netrange *)&sa->sat_zero[0]; add_route = 1; /* * if this is a point-to-point iface, and we already * have an iface for this AppleTalk address, then we * should not add a route */ if ((dev->flags & IFF_POINTOPOINT) && atalk_find_interface(sa->sat_addr.s_net, sa->sat_addr.s_node)) { printk(KERN_DEBUG "AppleTalk: point-to-point " "interface added with " "existing address\n"); add_route = 0; } /* * Phase 1 is fine on LocalTalk but we don't do * EtherTalk phase 1. Anyone wanting to add it, go ahead. */ if (dev->type == ARPHRD_ETHER && nr->nr_phase != 2) return -EPROTONOSUPPORT; if (sa->sat_addr.s_node == ATADDR_BCAST || sa->sat_addr.s_node == 254) return -EINVAL; if (atif) { /* Already setting address */ if (atif->status & ATIF_PROBE) return -EBUSY; atif->address.s_net = sa->sat_addr.s_net; atif->address.s_node = sa->sat_addr.s_node; atrtr_device_down(dev); /* Flush old routes */ } else { atif = atif_add_device(dev, &sa->sat_addr); if (!atif) return -ENOMEM; } atif->nets = *nr; /* * Check if the chosen address is used. If so we * error and atalkd will try another. */ if (!(dev->flags & IFF_LOOPBACK) && !(dev->flags & IFF_POINTOPOINT) && atif_probe_device(atif) < 0) { atif_drop_device(dev); return -EADDRINUSE; } /* Hey it worked - add the direct routes */ sa = (struct sockaddr_at *)&rtdef.rt_gateway; sa->sat_family = AF_APPLETALK; sa->sat_addr.s_net = atif->address.s_net; sa->sat_addr.s_node = atif->address.s_node; sa = (struct sockaddr_at *)&rtdef.rt_dst; rtdef.rt_flags = RTF_UP; sa->sat_family = AF_APPLETALK; sa->sat_addr.s_node = ATADDR_ANYNODE; if (dev->flags & IFF_LOOPBACK || dev->flags & IFF_POINTOPOINT) rtdef.rt_flags |= RTF_HOST; /* Routerless initial state */ if (nr->nr_firstnet == htons(0) && nr->nr_lastnet == htons(0xFFFE)) { sa->sat_addr.s_net = atif->address.s_net; atrtr_create(&rtdef, dev); atrtr_set_default(dev); } else { limit = ntohs(nr->nr_lastnet); if (limit - ntohs(nr->nr_firstnet) > 4096) { printk(KERN_WARNING "Too many routes/" "iface.\n"); return -EINVAL; } if (add_route) for (ct = ntohs(nr->nr_firstnet); ct <= limit; ct++) { sa->sat_addr.s_net = htons(ct); atrtr_create(&rtdef, dev); } } dev_mc_add_global(dev, aarp_mcast); return 0; case SIOCGIFADDR: if (!atif) return -EADDRNOTAVAIL; sa->sat_family = AF_APPLETALK; sa->sat_addr = atif->address; break; case SIOCGIFBRDADDR: if (!atif) return -EADDRNOTAVAIL; sa->sat_family = AF_APPLETALK; sa->sat_addr.s_net = atif->address.s_net; sa->sat_addr.s_node = ATADDR_BCAST; break; case SIOCATALKDIFADDR: case SIOCDIFADDR: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (sa->sat_family != AF_APPLETALK) return -EINVAL; atalk_dev_down(dev); break; case SIOCSARP: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (sa->sat_family != AF_APPLETALK) return -EINVAL; /* * for now, we only support proxy AARP on ELAP; * we should be able to do it for LocalTalk, too. */ if (dev->type != ARPHRD_ETHER) return -EPROTONOSUPPORT; /* * atif points to the current interface on this network; * we aren't concerned about its current status (at * least for now), but it has all the settings about * the network we're going to probe. Consequently, it * must exist. */ if (!atif) return -EADDRNOTAVAIL; nr = (struct atalk_netrange *)&(atif->nets); /* * Phase 1 is fine on Localtalk but we don't do * Ethertalk phase 1. Anyone wanting to add it, go ahead. */ if (dev->type == ARPHRD_ETHER && nr->nr_phase != 2) return -EPROTONOSUPPORT; if (sa->sat_addr.s_node == ATADDR_BCAST || sa->sat_addr.s_node == 254) return -EINVAL; /* * Check if the chosen address is used. If so we * error and ATCP will try another. */ if (atif_proxy_probe_device(atif, &(sa->sat_addr)) < 0) return -EADDRINUSE; /* * We now have an address on the local network, and * the AARP code will defend it for us until we take it * down. We don't set up any routes right now, because * ATCP will install them manually via SIOCADDRT. */ break; case SIOCDARP: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (sa->sat_family != AF_APPLETALK) return -EINVAL; if (!atif) return -EADDRNOTAVAIL; /* give to aarp module to remove proxy entry */ aarp_proxy_remove(atif->dev, &(sa->sat_addr)); return 0; } return put_user_ifreq(&atreq, arg); } static int atrtr_ioctl_addrt(struct rtentry *rt) { struct net_device *dev = NULL; if (rt->rt_dev) { char name[IFNAMSIZ]; if (copy_from_user(name, rt->rt_dev, IFNAMSIZ-1)) return -EFAULT; name[IFNAMSIZ-1] = '\0'; dev = __dev_get_by_name(&init_net, name); if (!dev) return -ENODEV; } return atrtr_create(rt, dev); } /* Routing ioctl() calls */ static int atrtr_ioctl(unsigned int cmd, void __user *arg) { struct rtentry rt; if (copy_from_user(&rt, arg, sizeof(rt))) return -EFAULT; switch (cmd) { case SIOCDELRT: if (rt.rt_dst.sa_family != AF_APPLETALK) return -EINVAL; return atrtr_delete(&((struct sockaddr_at *) &rt.rt_dst)->sat_addr); case SIOCADDRT: return atrtr_ioctl_addrt(&rt); } return -EINVAL; } /**************************************************************************\ * * * Handling for system calls applied via the various interfaces to an * * AppleTalk socket object. * * * \**************************************************************************/ /* * Checksum: This is 'optional'. It's quite likely also a good * candidate for assembler hackery 8) */ static unsigned long atalk_sum_partial(const unsigned char *data, int len, unsigned long sum) { /* This ought to be unwrapped neatly. I'll trust gcc for now */ while (len--) { sum += *data++; sum = rol16(sum, 1); } return sum; } /* Checksum skb data -- similar to skb_checksum */ static unsigned long atalk_sum_skb(const struct sk_buff *skb, int offset, int len, unsigned long sum) { int start = skb_headlen(skb); struct sk_buff *frag_iter; int i, copy; /* checksum stuff in header space */ if ((copy = start - offset) > 0) { if (copy > len) copy = len; sum = atalk_sum_partial(skb->data + offset, copy, sum); if ((len -= copy) == 0) return sum; offset += copy; } /* checksum stuff in frags */ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { int end; const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; WARN_ON(start > offset + len); end = start + skb_frag_size(frag); if ((copy = end - offset) > 0) { u8 *vaddr; if (copy > len) copy = len; vaddr = kmap_atomic(skb_frag_page(frag)); sum = atalk_sum_partial(vaddr + skb_frag_off(frag) + offset - start, copy, sum); kunmap_atomic(vaddr); if (!(len -= copy)) return sum; offset += copy; } start = end; } skb_walk_frags(skb, frag_iter) { int end; WARN_ON(start > offset + len); end = start + frag_iter->len; if ((copy = end - offset) > 0) { if (copy > len) copy = len; sum = atalk_sum_skb(frag_iter, offset - start, copy, sum); if ((len -= copy) == 0) return sum; offset += copy; } start = end; } BUG_ON(len > 0); return sum; } static __be16 atalk_checksum(const struct sk_buff *skb, int len) { unsigned long sum; /* skip header 4 bytes */ sum = atalk_sum_skb(skb, 4, len-4, 0); /* Use 0xFFFF for 0. 0 itself means none */ return sum ? htons((unsigned short)sum) : htons(0xFFFF); } static struct proto ddp_proto = { .name = "DDP", .owner = THIS_MODULE, .obj_size = sizeof(struct atalk_sock), }; /* * Create a socket. Initialise the socket, blank the addresses * set the state. */ static int atalk_create(struct net *net, struct socket *sock, int protocol, int kern) { struct sock *sk; int rc = -ESOCKTNOSUPPORT; if (!net_eq(net, &init_net)) return -EAFNOSUPPORT; /* * We permit SOCK_DGRAM and RAW is an extension. It is trivial to do * and gives you the full ELAP frame. Should be handy for CAP 8) */ if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM) goto out; rc = -EPERM; if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) goto out; rc = -ENOMEM; sk = sk_alloc(net, PF_APPLETALK, GFP_KERNEL, &ddp_proto, kern); if (!sk) goto out; rc = 0; sock->ops = &atalk_dgram_ops; sock_init_data(sock, sk); /* Checksums on by default */ sock_set_flag(sk, SOCK_ZAPPED); out: return rc; } /* Free a socket. No work needed */ static int atalk_release(struct socket *sock) { struct sock *sk = sock->sk; if (sk) { sock_hold(sk); lock_sock(sk); sock_orphan(sk); sock->sk = NULL; atalk_destroy_socket(sk); release_sock(sk); sock_put(sk); } return 0; } /** * atalk_pick_and_bind_port - Pick a source port when one is not given * @sk: socket to insert into the tables * @sat: address to search for * * Pick a source port when one is not given. If we can find a suitable free * one, we insert the socket into the tables using it. * * This whole operation must be atomic. */ static int atalk_pick_and_bind_port(struct sock *sk, struct sockaddr_at *sat) { int retval; write_lock_bh(&atalk_sockets_lock); for (sat->sat_port = ATPORT_RESERVED; sat->sat_port < ATPORT_LAST; sat->sat_port++) { struct sock *s; sk_for_each(s, &atalk_sockets) { struct atalk_sock *at = at_sk(s); if (at->src_net == sat->sat_addr.s_net && at->src_node == sat->sat_addr.s_node && at->src_port == sat->sat_port) goto try_next_port; } /* Wheee, it's free, assign and insert. */ __atalk_insert_socket(sk); at_sk(sk)->src_port = sat->sat_port; retval = 0; goto out; try_next_port:; } retval = -EBUSY; out: write_unlock_bh(&atalk_sockets_lock); return retval; } static int atalk_autobind(struct sock *sk) { struct atalk_sock *at = at_sk(sk); struct sockaddr_at sat; struct atalk_addr *ap = atalk_find_primary(); int n = -EADDRNOTAVAIL; if (!ap || ap->s_net == htons(ATADDR_ANYNET)) goto out; at->src_net = sat.sat_addr.s_net = ap->s_net; at->src_node = sat.sat_addr.s_node = ap->s_node; n = atalk_pick_and_bind_port(sk, &sat); if (!n) sock_reset_flag(sk, SOCK_ZAPPED); out: return n; } /* Set the address 'our end' of the connection */ static int atalk_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sockaddr_at *addr = (struct sockaddr_at *)uaddr; struct sock *sk = sock->sk; struct atalk_sock *at = at_sk(sk); int err; if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_at)) return -EINVAL; if (addr->sat_family != AF_APPLETALK) return -EAFNOSUPPORT; lock_sock(sk); if (addr->sat_addr.s_net == htons(ATADDR_ANYNET)) { struct atalk_addr *ap = atalk_find_primary(); err = -EADDRNOTAVAIL; if (!ap) goto out; at->src_net = addr->sat_addr.s_net = ap->s_net; at->src_node = addr->sat_addr.s_node = ap->s_node; } else { err = -EADDRNOTAVAIL; if (!atalk_find_interface(addr->sat_addr.s_net, addr->sat_addr.s_node)) goto out; at->src_net = addr->sat_addr.s_net; at->src_node = addr->sat_addr.s_node; } if (addr->sat_port == ATADDR_ANYPORT) { err = atalk_pick_and_bind_port(sk, addr); if (err < 0) goto out; } else { at->src_port = addr->sat_port; err = -EADDRINUSE; if (atalk_find_or_insert_socket(sk, addr)) goto out; } sock_reset_flag(sk, SOCK_ZAPPED); err = 0; out: release_sock(sk); return err; } /* Set the address we talk to */ static int atalk_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; struct atalk_sock *at = at_sk(sk); struct sockaddr_at *addr; int err; sk->sk_state = TCP_CLOSE; sock->state = SS_UNCONNECTED; if (addr_len != sizeof(*addr)) return -EINVAL; addr = (struct sockaddr_at *)uaddr; if (addr->sat_family != AF_APPLETALK) return -EAFNOSUPPORT; if (addr->sat_addr.s_node == ATADDR_BCAST && !sock_flag(sk, SOCK_BROADCAST)) { #if 1 pr_warn("atalk_connect: %s is broken and did not set SO_BROADCAST.\n", current->comm); #else return -EACCES; #endif } lock_sock(sk); err = -EBUSY; if (sock_flag(sk, SOCK_ZAPPED)) if (atalk_autobind(sk) < 0) goto out; err = -ENETUNREACH; if (!atrtr_get_dev(&addr->sat_addr)) goto out; at->dest_port = addr->sat_port; at->dest_net = addr->sat_addr.s_net; at->dest_node = addr->sat_addr.s_node; sock->state = SS_CONNECTED; sk->sk_state = TCP_ESTABLISHED; err = 0; out: release_sock(sk); return err; } /* * Find the name of an AppleTalk socket. Just copy the right * fields into the sockaddr. */ static int atalk_getname(struct socket *sock, struct sockaddr *uaddr, int peer) { struct sockaddr_at sat; struct sock *sk = sock->sk; struct atalk_sock *at = at_sk(sk); int err; lock_sock(sk); err = -ENOBUFS; if (sock_flag(sk, SOCK_ZAPPED)) if (atalk_autobind(sk) < 0) goto out; memset(&sat, 0, sizeof(sat)); if (peer) { err = -ENOTCONN; if (sk->sk_state != TCP_ESTABLISHED) goto out; sat.sat_addr.s_net = at->dest_net; sat.sat_addr.s_node = at->dest_node; sat.sat_port = at->dest_port; } else { sat.sat_addr.s_net = at->src_net; sat.sat_addr.s_node = at->src_node; sat.sat_port = at->src_port; } sat.sat_family = AF_APPLETALK; memcpy(uaddr, &sat, sizeof(sat)); err = sizeof(struct sockaddr_at); out: release_sock(sk); return err; } static int atalk_route_packet(struct sk_buff *skb, struct net_device *dev, struct ddpehdr *ddp, __u16 len_hops, int origlen) { struct atalk_route *rt; struct atalk_addr ta; /* * Don't route multicast, etc., packets, or packets sent to "this * network" */ if (skb->pkt_type != PACKET_HOST || !ddp->deh_dnet) { /* * FIXME: * * Can it ever happen that a packet is from a PPP iface and * needs to be broadcast onto the default network? */ if (dev->type == ARPHRD_PPP) printk(KERN_DEBUG "AppleTalk: didn't forward broadcast " "packet received from PPP iface\n"); goto free_it; } ta.s_net = ddp->deh_dnet; ta.s_node = ddp->deh_dnode; /* Route the packet */ rt = atrtr_find(&ta); /* increment hops count */ len_hops += 1 << 10; if (!rt || !(len_hops & (15 << 10))) goto free_it; /* FIXME: use skb->cb to be able to use shared skbs */ /* * Route goes through another gateway, so set the target to the * gateway instead. */ if (rt->flags & RTF_GATEWAY) { ta.s_net = rt->gateway.s_net; ta.s_node = rt->gateway.s_node; } /* Fix up skb->len field */ skb_trim(skb, min_t(unsigned int, origlen, (rt->dev->hard_header_len + ddp_dl->header_length + (len_hops & 1023)))); /* FIXME: use skb->cb to be able to use shared skbs */ ddp->deh_len_hops = htons(len_hops); /* * Send the buffer onwards * * Now we must always be careful. If it's come from LocalTalk to * EtherTalk it might not fit * * Order matters here: If a packet has to be copied to make a new * headroom (rare hopefully) then it won't need unsharing. * * Note. ddp-> becomes invalid at the realloc. */ if (skb_headroom(skb) < 22) { /* 22 bytes - 12 ether, 2 len, 3 802.2 5 snap */ struct sk_buff *nskb = skb_realloc_headroom(skb, 32); kfree_skb(skb); skb = nskb; } else skb = skb_unshare(skb, GFP_ATOMIC); /* * If the buffer didn't vanish into the lack of space bitbucket we can * send it. */ if (skb == NULL) goto drop; if (aarp_send_ddp(rt->dev, skb, &ta, NULL) == NET_XMIT_DROP) return NET_RX_DROP; return NET_RX_SUCCESS; free_it: kfree_skb(skb); drop: return NET_RX_DROP; } /** * atalk_rcv - Receive a packet (in skb) from device dev * @skb: packet received * @dev: network device where the packet comes from * @pt: packet type * @orig_dev: the original receive net device * * Receive a packet (in skb) from device dev. This has come from the SNAP * decoder, and on entry skb->transport_header is the DDP header, skb->len * is the DDP header, skb->len is the DDP length. The physical headers * have been extracted. PPP should probably pass frames marked as for this * layer. [ie ARPHRD_ETHERTALK] */ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { struct ddpehdr *ddp; struct sock *sock; struct atalk_iface *atif; struct sockaddr_at tosat; int origlen; __u16 len_hops; if (!net_eq(dev_net(dev), &init_net)) goto drop; /* Don't mangle buffer if shared */ if (!(skb = skb_share_check(skb, GFP_ATOMIC))) goto out; /* Size check and make sure header is contiguous */ if (!pskb_may_pull(skb, sizeof(*ddp))) goto drop; ddp = ddp_hdr(skb); len_hops = ntohs(ddp->deh_len_hops); /* Trim buffer in case of stray trailing data */ origlen = skb->len; skb_trim(skb, min_t(unsigned int, skb->len, len_hops & 1023)); /* * Size check to see if ddp->deh_len was crap * (Otherwise we'll detonate most spectacularly * in the middle of atalk_checksum() or recvmsg()). */ if (skb->len < sizeof(*ddp) || skb->len < (len_hops & 1023)) { pr_debug("AppleTalk: dropping corrupted frame (deh_len=%u, " "skb->len=%u)\n", len_hops & 1023, skb->len); goto drop; } /* * Any checksums. Note we don't do htons() on this == is assumed to be * valid for net byte orders all over the networking code... */ if (ddp->deh_sum && atalk_checksum(skb, len_hops & 1023) != ddp->deh_sum) /* Not a valid AppleTalk frame - dustbin time */ goto drop; /* Check the packet is aimed at us */ if (!ddp->deh_dnet) /* Net 0 is 'this network' */ atif = atalk_find_anynet(ddp->deh_dnode, dev); else atif = atalk_find_interface(ddp->deh_dnet, ddp->deh_dnode); if (!atif) { /* Not ours, so we route the packet via the correct * AppleTalk iface */ return atalk_route_packet(skb, dev, ddp, len_hops, origlen); } /* * Which socket - atalk_search_socket() looks for a *full match* * of the <net, node, port> tuple. */ tosat.sat_addr.s_net = ddp->deh_dnet; tosat.sat_addr.s_node = ddp->deh_dnode; tosat.sat_port = ddp->deh_dport; sock = atalk_search_socket(&tosat, atif); if (!sock) /* But not one of our sockets */ goto drop; /* Queue packet (standard) */ if (sock_queue_rcv_skb(sock, skb) < 0) goto drop; return NET_RX_SUCCESS; drop: kfree_skb(skb); out: return NET_RX_DROP; } /* * Receive a LocalTalk frame. We make some demands on the caller here. * Caller must provide enough headroom on the packet to pull the short * header and append a long one. */ static int ltalk_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { if (!net_eq(dev_net(dev), &init_net)) goto freeit; /* Expand any short form frames */ if (skb_mac_header(skb)[2] == 1) { struct ddpehdr *ddp; /* Find our address */ struct atalk_addr *ap = atalk_find_dev_addr(dev); if (!ap || skb->len < sizeof(__be16) || skb->len > 1023) goto freeit; /* Don't mangle buffer if shared */ if (!(skb = skb_share_check(skb, GFP_ATOMIC))) return 0; /* * The push leaves us with a ddephdr not an shdr, and * handily the port bytes in the right place preset. */ ddp = skb_push(skb, sizeof(*ddp) - 4); /* Now fill in the long header */ /* * These two first. The mac overlays the new source/dest * network information so we MUST copy these before * we write the network numbers ! */ ddp->deh_dnode = skb_mac_header(skb)[0]; /* From physical header */ ddp->deh_snode = skb_mac_header(skb)[1]; /* From physical header */ ddp->deh_dnet = ap->s_net; /* Network number */ ddp->deh_snet = ap->s_net; ddp->deh_sum = 0; /* No checksum */ /* * Not sure about this bit... */ /* Non routable, so force a drop if we slip up later */ ddp->deh_len_hops = htons(skb->len + (DDP_MAXHOPS << 10)); } skb_reset_transport_header(skb); return atalk_rcv(skb, dev, pt, orig_dev); freeit: kfree_skb(skb); return 0; } static int atalk_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) { struct sock *sk = sock->sk; struct atalk_sock *at = at_sk(sk); DECLARE_SOCKADDR(struct sockaddr_at *, usat, msg->msg_name); int flags = msg->msg_flags; int loopback = 0; struct sockaddr_at local_satalk, gsat; struct sk_buff *skb; struct net_device *dev; struct ddpehdr *ddp; int size, hard_header_len; struct atalk_route *rt, *rt_lo = NULL; int err; if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) return -EINVAL; if (len > DDP_MAXSZ) return -EMSGSIZE; lock_sock(sk); if (usat) { err = -EBUSY; if (sock_flag(sk, SOCK_ZAPPED)) if (atalk_autobind(sk) < 0) goto out; err = -EINVAL; if (msg->msg_namelen < sizeof(*usat) || usat->sat_family != AF_APPLETALK) goto out; err = -EPERM; /* netatalk didn't implement this check */ if (usat->sat_addr.s_node == ATADDR_BCAST && !sock_flag(sk, SOCK_BROADCAST)) { goto out; } } else { err = -ENOTCONN; if (sk->sk_state != TCP_ESTABLISHED) goto out; usat = &local_satalk; usat->sat_family = AF_APPLETALK; usat->sat_port = at->dest_port; usat->sat_addr.s_node = at->dest_node; usat->sat_addr.s_net = at->dest_net; } /* Build a packet */ net_dbg_ratelimited("SK %p: Got address.\n", sk); /* For headers */ size = sizeof(struct ddpehdr) + len + ddp_dl->header_length; if (usat->sat_addr.s_net || usat->sat_addr.s_node == ATADDR_ANYNODE) { rt = atrtr_find(&usat->sat_addr); } else { struct atalk_addr at_hint; at_hint.s_node = 0; at_hint.s_net = at->src_net; rt = atrtr_find(&at_hint); } err = -ENETUNREACH; if (!rt) goto out; dev = rt->dev; net_dbg_ratelimited("SK %p: Size needed %d, device %s\n", sk, size, dev->name); hard_header_len = dev->hard_header_len; /* Leave room for loopback hardware header if necessary */ if (usat->sat_addr.s_node == ATADDR_BCAST && (dev->flags & IFF_LOOPBACK || !(rt->flags & RTF_GATEWAY))) { struct atalk_addr at_lo; at_lo.s_node = 0; at_lo.s_net = 0; rt_lo = atrtr_find(&at_lo); if (rt_lo && rt_lo->dev->hard_header_len > hard_header_len) hard_header_len = rt_lo->dev->hard_header_len; } size += hard_header_len; release_sock(sk); skb = sock_alloc_send_skb(sk, size, (flags & MSG_DONTWAIT), &err); lock_sock(sk); if (!skb) goto out; skb_reserve(skb, ddp_dl->header_length); skb_reserve(skb, hard_header_len); skb->dev = dev; net_dbg_ratelimited("SK %p: Begin build.\n", sk); ddp = skb_put(skb, sizeof(struct ddpehdr)); ddp->deh_len_hops = htons(len + sizeof(*ddp)); ddp->deh_dnet = usat->sat_addr.s_net; ddp->deh_snet = at->src_net; ddp->deh_dnode = usat->sat_addr.s_node; ddp->deh_snode = at->src_node; ddp->deh_dport = usat->sat_port; ddp->deh_sport = at->src_port; net_dbg_ratelimited("SK %p: Copy user data (%zd bytes).\n", sk, len); err = memcpy_from_msg(skb_put(skb, len), msg, len); if (err) { kfree_skb(skb); err = -EFAULT; goto out; } if (sk->sk_no_check_tx) ddp->deh_sum = 0; else ddp->deh_sum = atalk_checksum(skb, len + sizeof(*ddp)); /* * Loopback broadcast packets to non gateway targets (ie routes * to group we are in) */ if (ddp->deh_dnode == ATADDR_BCAST && !(rt->flags & RTF_GATEWAY) && !(dev->flags & IFF_LOOPBACK)) { struct sk_buff *skb2 = skb_copy(skb, GFP_KERNEL); if (skb2) { loopback = 1; net_dbg_ratelimited("SK %p: send out(copy).\n", sk); /* * If it fails it is queued/sent above in the aarp queue */ aarp_send_ddp(dev, skb2, &usat->sat_addr, NULL); } } if (dev->flags & IFF_LOOPBACK || loopback) { net_dbg_ratelimited("SK %p: Loop back.\n", sk); /* loop back */ skb_orphan(skb); if (ddp->deh_dnode == ATADDR_BCAST) { if (!rt_lo) { kfree_skb(skb); err = -ENETUNREACH; goto out; } dev = rt_lo->dev; skb->dev = dev; } ddp_dl->request(ddp_dl, skb, dev->dev_addr); } else { net_dbg_ratelimited("SK %p: send out.\n", sk); if (rt->flags & RTF_GATEWAY) { gsat.sat_addr = rt->gateway; usat = &gsat; } /* * If it fails it is queued/sent above in the aarp queue */ aarp_send_ddp(dev, skb, &usat->sat_addr, NULL); } net_dbg_ratelimited("SK %p: Done write (%zd).\n", sk, len); out: release_sock(sk); return err ? : len; } static int atalk_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int flags) { struct sock *sk = sock->sk; struct ddpehdr *ddp; int copied = 0; int offset = 0; int err = 0; struct sk_buff *skb; skb = skb_recv_datagram(sk, flags, &err); lock_sock(sk); if (!skb) goto out; /* FIXME: use skb->cb to be able to use shared skbs */ ddp = ddp_hdr(skb); copied = ntohs(ddp->deh_len_hops) & 1023; if (sk->sk_type != SOCK_RAW) { offset = sizeof(*ddp); copied -= offset; } if (copied > size) { copied = size; msg->msg_flags |= MSG_TRUNC; } err = skb_copy_datagram_msg(skb, offset, msg, copied); if (!err && msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_at *, sat, msg->msg_name); sat->sat_family = AF_APPLETALK; sat->sat_port = ddp->deh_sport; sat->sat_addr.s_node = ddp->deh_snode; sat->sat_addr.s_net = ddp->deh_snet; msg->msg_namelen = sizeof(*sat); } skb_free_datagram(sk, skb); /* Free the datagram. */ out: release_sock(sk); return err ? : copied; } /* * AppleTalk ioctl calls. */ static int atalk_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { int rc = -ENOIOCTLCMD; struct sock *sk = sock->sk; void __user *argp = (void __user *)arg; switch (cmd) { /* Protocol layer */ case TIOCOUTQ: { long amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); if (amount < 0) amount = 0; rc = put_user(amount, (int __user *)argp); break; } case TIOCINQ: { struct sk_buff *skb; long amount = 0; spin_lock_irq(&sk->sk_receive_queue.lock); skb = skb_peek(&sk->sk_receive_queue); if (skb) amount = skb->len - sizeof(struct ddpehdr); spin_unlock_irq(&sk->sk_receive_queue.lock); rc = put_user(amount, (int __user *)argp); break; } /* Routing */ case SIOCADDRT: case SIOCDELRT: rc = -EPERM; if (capable(CAP_NET_ADMIN)) rc = atrtr_ioctl(cmd, argp); break; /* Interface */ case SIOCGIFADDR: case SIOCSIFADDR: case SIOCGIFBRDADDR: case SIOCATALKDIFADDR: case SIOCDIFADDR: case SIOCSARP: /* proxy AARP */ case SIOCDARP: /* proxy AARP */ rtnl_lock(); rc = atif_ioctl(cmd, argp); rtnl_unlock(); break; } return rc; } #ifdef CONFIG_COMPAT static int atalk_compat_routing_ioctl(struct sock *sk, unsigned int cmd, struct compat_rtentry __user *ur) { compat_uptr_t rtdev; struct rtentry rt; if (copy_from_user(&rt.rt_dst, &ur->rt_dst, 3 * sizeof(struct sockaddr)) || get_user(rt.rt_flags, &ur->rt_flags) || get_user(rt.rt_metric, &ur->rt_metric) || get_user(rt.rt_mtu, &ur->rt_mtu) || get_user(rt.rt_window, &ur->rt_window) || get_user(rt.rt_irtt, &ur->rt_irtt) || get_user(rtdev, &ur->rt_dev)) return -EFAULT; switch (cmd) { case SIOCDELRT: if (rt.rt_dst.sa_family != AF_APPLETALK) return -EINVAL; return atrtr_delete(&((struct sockaddr_at *) &rt.rt_dst)->sat_addr); case SIOCADDRT: rt.rt_dev = compat_ptr(rtdev); return atrtr_ioctl_addrt(&rt); default: return -EINVAL; } } static int atalk_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { void __user *argp = compat_ptr(arg); struct sock *sk = sock->sk; switch (cmd) { case SIOCADDRT: case SIOCDELRT: return atalk_compat_routing_ioctl(sk, cmd, argp); /* * SIOCATALKDIFADDR is a SIOCPROTOPRIVATE ioctl number, so we * cannot handle it in common code. The data we access if ifreq * here is compatible, so we can simply call the native * handler. */ case SIOCATALKDIFADDR: return atalk_ioctl(sock, cmd, (unsigned long)argp); default: return -ENOIOCTLCMD; } } #endif /* CONFIG_COMPAT */ static const struct net_proto_family atalk_family_ops = { .family = PF_APPLETALK, .create = atalk_create, .owner = THIS_MODULE, }; static const struct proto_ops atalk_dgram_ops = { .family = PF_APPLETALK, .owner = THIS_MODULE, .release = atalk_release, .bind = atalk_bind, .connect = atalk_connect, .socketpair = sock_no_socketpair, .accept = sock_no_accept, .getname = atalk_getname, .poll = datagram_poll, .ioctl = atalk_ioctl, .gettstamp = sock_gettstamp, #ifdef CONFIG_COMPAT .compat_ioctl = atalk_compat_ioctl, #endif .listen = sock_no_listen, .shutdown = sock_no_shutdown, .sendmsg = atalk_sendmsg, .recvmsg = atalk_recvmsg, .mmap = sock_no_mmap, }; static struct notifier_block ddp_notifier = { .notifier_call = ddp_device_event, }; static struct packet_type ltalk_packet_type __read_mostly = { .type = cpu_to_be16(ETH_P_LOCALTALK), .func = ltalk_rcv, }; static struct packet_type ppptalk_packet_type __read_mostly = { .type = cpu_to_be16(ETH_P_PPPTALK), .func = atalk_rcv, }; static unsigned char ddp_snap_id[] = { 0x08, 0x00, 0x07, 0x80, 0x9B }; /* Export symbols for use by drivers when AppleTalk is a module */ EXPORT_SYMBOL(atrtr_get_dev); EXPORT_SYMBOL(atalk_find_dev_addr); /* Called by proto.c on kernel start up */ static int __init atalk_init(void) { int rc; rc = proto_register(&ddp_proto, 0); if (rc) goto out; rc = sock_register(&atalk_family_ops); if (rc) goto out_proto; ddp_dl = register_snap_client(ddp_snap_id, atalk_rcv); if (!ddp_dl) { pr_crit("Unable to register DDP with SNAP.\n"); rc = -ENOMEM; goto out_sock; } dev_add_pack(<alk_packet_type); dev_add_pack(&ppptalk_packet_type); rc = register_netdevice_notifier(&ddp_notifier); if (rc) goto out_snap; rc = aarp_proto_init(); if (rc) goto out_dev; rc = atalk_proc_init(); if (rc) goto out_aarp; rc = atalk_register_sysctl(); if (rc) goto out_proc; out: return rc; out_proc: atalk_proc_exit(); out_aarp: aarp_cleanup_module(); out_dev: unregister_netdevice_notifier(&ddp_notifier); out_snap: dev_remove_pack(&ppptalk_packet_type); dev_remove_pack(<alk_packet_type); unregister_snap_client(ddp_dl); out_sock: sock_unregister(PF_APPLETALK); out_proto: proto_unregister(&ddp_proto); goto out; } module_init(atalk_init); /* * No explicit module reference count manipulation is needed in the * protocol. Socket layer sets module reference count for us * and interfaces reference counting is done * by the network device layer. * * Ergo, before the AppleTalk module can be removed, all AppleTalk * sockets should be closed from user space. */ static void __exit atalk_exit(void) { #ifdef CONFIG_SYSCTL atalk_unregister_sysctl(); #endif /* CONFIG_SYSCTL */ atalk_proc_exit(); aarp_cleanup_module(); /* General aarp clean-up. */ unregister_netdevice_notifier(&ddp_notifier); dev_remove_pack(<alk_packet_type); dev_remove_pack(&ppptalk_packet_type); unregister_snap_client(ddp_dl); sock_unregister(PF_APPLETALK); proto_unregister(&ddp_proto); } module_exit(atalk_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alan Cox <alan@lxorguk.ukuu.org.uk>"); MODULE_DESCRIPTION("AppleTalk 0.20\n"); MODULE_ALIAS_NETPROTO(PF_APPLETALK);
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