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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 | /* * ROSE release 003 * * This code REQUIRES 2.1.15 or higher/ NET3.038 * * This module: * This module is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * History * ROSE 001 Jonathan(G4KLX) Cloned from af_netrom.c. * Alan(GW4PTS) Hacked up for newer API stuff * Terry (VK2KTJ) Added support for variable length * address masks. * ROSE 002 Jonathan(G4KLX) Changed hdrincl to qbitincl. * Added random number facilities entry. * Variable number of ROSE devices. * ROSE 003 Jonathan(G4KLX) New timer architecture. * Implemented idle timer. * Added use count to neighbour. * Tomi(OH2BNS) Fixed rose_getname(). * Arnaldo C. Melo s/suser/capable/ + micro cleanups */ #include <linux/config.h> #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/timer.h> #include <linux/string.h> #include <linux/sockios.h> #include <linux/net.h> #include <linux/stat.h> #include <net/ax25.h> #include <linux/inet.h> #include <linux/netdevice.h> #include <linux/if_arp.h> #include <linux/skbuff.h> #include <net/sock.h> #include <asm/segment.h> #include <asm/system.h> #include <asm/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 <net/rose.h> #include <linux/proc_fs.h> #include <net/ip.h> #include <net/arp.h> int rose_ndevs = 10; int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; static struct sock *rose_list; static struct proto_ops rose_proto_ops; ax25_address rose_callsign; /* * Convert a ROSE address into text. */ char *rose2asc(rose_address *addr) { static char buffer[11]; if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && addr->rose_addr[4] == 0x00) { strcpy(buffer, "*"); } else { sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, addr->rose_addr[1] & 0xFF, addr->rose_addr[2] & 0xFF, addr->rose_addr[3] & 0xFF, addr->rose_addr[4] & 0xFF); } return buffer; } /* * Compare two ROSE addresses, 0 == equal. */ int rosecmp(rose_address *addr1, rose_address *addr2) { int i; for (i = 0; i < 5; i++) if (addr1->rose_addr[i] != addr2->rose_addr[i]) return 1; return 0; } /* * Compare two ROSE addresses for only mask digits, 0 == equal. */ int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) { int i, j; if (mask > 10) return 1; for (i = 0; i < mask; i++) { j = i / 2; if ((i % 2) != 0) { if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) return 1; } else { if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) return 1; } } return 0; } static void rose_free_sock(struct sock *sk) { sk_free(sk); MOD_DEC_USE_COUNT; } static struct sock *rose_alloc_sock(void) { struct sock *sk; rose_cb *rose; if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, 1)) == NULL) return NULL; if ((rose = kmalloc(sizeof(*rose), GFP_ATOMIC)) == NULL) { sk_free(sk); return NULL; } MOD_INC_USE_COUNT; memset(rose, 0x00, sizeof(*rose)); sk->protinfo.rose = rose; rose->sk = sk; return sk; } /* * Socket removal during an interrupt is now safe. */ static void rose_remove_socket(struct sock *sk) { struct sock *s; unsigned long flags; save_flags(flags); cli(); if ((s = rose_list) == sk) { rose_list = s->next; restore_flags(flags); return; } while (s != NULL && s->next != NULL) { if (s->next == sk) { s->next = sk->next; restore_flags(flags); return; } s = s->next; } restore_flags(flags); } /* * Kill all bound sockets on a broken link layer connection to a * particular neighbour. */ void rose_kill_by_neigh(struct rose_neigh *neigh) { struct sock *s; for (s = rose_list; s != NULL; s = s->next) { if (s->protinfo.rose->neighbour == neigh) { rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); s->protinfo.rose->neighbour->use--; s->protinfo.rose->neighbour = NULL; } } } /* * Kill all bound sockets on a dropped device. */ static void rose_kill_by_device(struct net_device *dev) { struct sock *s; for (s = rose_list; s != NULL; s = s->next) { if (s->protinfo.rose->device == dev) { rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); s->protinfo.rose->neighbour->use--; s->protinfo.rose->device = NULL; } } } /* * Handle device status changes. */ static int rose_device_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = (struct net_device *)ptr; if (event != NETDEV_DOWN) return NOTIFY_DONE; switch (dev->type) { case ARPHRD_ROSE: rose_kill_by_device(dev); break; case ARPHRD_AX25: rose_link_device_down(dev); rose_rt_device_down(dev); break; } return NOTIFY_DONE; } /* * Add a socket to the bound sockets list. */ static void rose_insert_socket(struct sock *sk) { unsigned long flags; save_flags(flags); cli(); sk->next = rose_list; rose_list = sk; restore_flags(flags); } /* * Find a socket that wants to accept the Call Request we just * received. */ static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) { unsigned long flags; struct sock *s; save_flags(flags); cli(); for (s = rose_list; s != NULL; s = s->next) { if (rosecmp(&s->protinfo.rose->source_addr, addr) == 0 && ax25cmp(&s->protinfo.rose->source_call, call) == 0 && s->protinfo.rose->source_ndigis == 0 && s->state == TCP_LISTEN) { restore_flags(flags); return s; } } for (s = rose_list; s != NULL; s = s->next) { if (rosecmp(&s->protinfo.rose->source_addr, addr) == 0 && ax25cmp(&s->protinfo.rose->source_call, &null_ax25_address) == 0 && s->state == TCP_LISTEN) { restore_flags(flags); return s; } } restore_flags(flags); return NULL; } /* * Find a connected ROSE socket given my LCI and device. */ struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) { struct sock *s; unsigned long flags; save_flags(flags); cli(); for (s = rose_list; s != NULL; s = s->next) { if (s->protinfo.rose->lci == lci && s->protinfo.rose->neighbour == neigh) { restore_flags(flags); return s; } } restore_flags(flags); return NULL; } /* * Find a unique LCI for a given device. */ unsigned int rose_new_lci(struct rose_neigh *neigh) { int lci; if (neigh->dce_mode) { for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) return lci; } else { for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) return lci; } return 0; } /* * Deferred destroy. */ void rose_destroy_socket(struct sock *); /* * Handler for deferred kills. */ static void rose_destroy_timer(unsigned long data) { rose_destroy_socket((struct sock *)data); } /* * This is called from user mode and the timers. Thus it protects itself against * interrupt users but doesn't worry about being called during work. * Once it is removed from the queue no interrupt or bottom half will * touch it and we are (fairly 8-) ) safe. */ void rose_destroy_socket(struct sock *sk) /* Not static as it's used by the timer */ { struct sk_buff *skb; unsigned long flags; save_flags(flags); cli(); rose_stop_heartbeat(sk); rose_stop_idletimer(sk); rose_stop_timer(sk); rose_remove_socket(sk); rose_clear_queues(sk); /* Flush the queues */ while ((skb = skb_dequeue(&sk->receive_queue)) != NULL) { if (skb->sk != sk) { /* A pending connection */ skb->sk->dead = 1; /* Queue the unaccepted socket for death */ rose_start_heartbeat(skb->sk); skb->sk->protinfo.rose->state = ROSE_STATE_0; } kfree_skb(skb); } if (atomic_read(&sk->wmem_alloc) != 0 || atomic_read(&sk->rmem_alloc) != 0) { /* Defer: outstanding buffers */ init_timer(&sk->timer); sk->timer.expires = jiffies + 10 * HZ; sk->timer.function = rose_destroy_timer; sk->timer.data = (unsigned long)sk; add_timer(&sk->timer); } else { rose_free_sock(sk); } restore_flags(flags); } /* * Handling for system calls applied via the various interfaces to a * ROSE socket object. */ static int rose_setsockopt(struct socket *sock, int level, int optname, char *optval, int optlen) { struct sock *sk = sock->sk; int opt; if (level != SOL_ROSE) return -ENOPROTOOPT; if (optlen < sizeof(int)) return -EINVAL; if (get_user(opt, (int *)optval)) return -EFAULT; switch (optname) { case ROSE_DEFER: sk->protinfo.rose->defer = opt ? 1 : 0; return 0; case ROSE_T1: if (opt < 1) return -EINVAL; sk->protinfo.rose->t1 = opt * HZ; return 0; case ROSE_T2: if (opt < 1) return -EINVAL; sk->protinfo.rose->t2 = opt * HZ; return 0; case ROSE_T3: if (opt < 1) return -EINVAL; sk->protinfo.rose->t3 = opt * HZ; return 0; case ROSE_HOLDBACK: if (opt < 1) return -EINVAL; sk->protinfo.rose->hb = opt * HZ; return 0; case ROSE_IDLE: if (opt < 0) return -EINVAL; sk->protinfo.rose->idle = opt * 60 * HZ; return 0; case ROSE_QBITINCL: sk->protinfo.rose->qbitincl = opt ? 1 : 0; return 0; default: return -ENOPROTOOPT; } } static int rose_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { struct sock *sk = sock->sk; int val = 0; int len; if (level != SOL_ROSE) return -ENOPROTOOPT; if (get_user(len, optlen)) return -EFAULT; if (len < 0) return -EINVAL; switch (optname) { case ROSE_DEFER: val = sk->protinfo.rose->defer; break; case ROSE_T1: val = sk->protinfo.rose->t1 / HZ; break; case ROSE_T2: val = sk->protinfo.rose->t2 / HZ; break; case ROSE_T3: val = sk->protinfo.rose->t3 / HZ; break; case ROSE_HOLDBACK: val = sk->protinfo.rose->hb / HZ; break; case ROSE_IDLE: val = sk->protinfo.rose->idle / (60 * HZ); break; case ROSE_QBITINCL: val = sk->protinfo.rose->qbitincl; break; default: return -ENOPROTOOPT; } len = min_t(unsigned int, len, sizeof(int)); if (put_user(len, optlen)) return -EFAULT; return copy_to_user(optval, &val, len) ? -EFAULT : 0; } static int rose_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; if (sk->state != TCP_LISTEN) { sk->protinfo.rose->dest_ndigis = 0; memset(&sk->protinfo.rose->dest_addr, '\0', ROSE_ADDR_LEN); memset(&sk->protinfo.rose->dest_call, '\0', AX25_ADDR_LEN); memset(sk->protinfo.rose->dest_digis, '\0', AX25_ADDR_LEN*ROSE_MAX_DIGIS); sk->max_ack_backlog = backlog; sk->state = TCP_LISTEN; return 0; } return -EOPNOTSUPP; } static int rose_create(struct socket *sock, int protocol) { struct sock *sk; rose_cb *rose; if (sock->type != SOCK_SEQPACKET || protocol != 0) return -ESOCKTNOSUPPORT; if ((sk = rose_alloc_sock()) == NULL) return -ENOMEM; rose = sk->protinfo.rose; sock_init_data(sock, sk); skb_queue_head_init(&rose->ack_queue); #ifdef M_BIT skb_queue_head_init(&rose->frag_queue); rose->fraglen = 0; #endif sock->ops = &rose_proto_ops; sk->protocol = protocol; init_timer(&rose->timer); init_timer(&rose->idletimer); rose->t1 = sysctl_rose_call_request_timeout; rose->t2 = sysctl_rose_reset_request_timeout; rose->t3 = sysctl_rose_clear_request_timeout; rose->hb = sysctl_rose_ack_hold_back_timeout; rose->idle = sysctl_rose_no_activity_timeout; rose->state = ROSE_STATE_0; return 0; } static struct sock *rose_make_new(struct sock *osk) { struct sock *sk; rose_cb *rose; if (osk->type != SOCK_SEQPACKET) return NULL; if ((sk = rose_alloc_sock()) == NULL) return NULL; rose = sk->protinfo.rose; sock_init_data(NULL, sk); skb_queue_head_init(&rose->ack_queue); #ifdef M_BIT skb_queue_head_init(&rose->frag_queue); rose->fraglen = 0; #endif sk->type = osk->type; sk->socket = osk->socket; sk->priority = osk->priority; sk->protocol = osk->protocol; sk->rcvbuf = osk->rcvbuf; sk->sndbuf = osk->sndbuf; sk->debug = osk->debug; sk->state = TCP_ESTABLISHED; sk->sleep = osk->sleep; sk->zapped = osk->zapped; init_timer(&rose->timer); init_timer(&rose->idletimer); rose->t1 = osk->protinfo.rose->t1; rose->t2 = osk->protinfo.rose->t2; rose->t3 = osk->protinfo.rose->t3; rose->hb = osk->protinfo.rose->hb; rose->idle = osk->protinfo.rose->idle; rose->defer = osk->protinfo.rose->defer; rose->device = osk->protinfo.rose->device; rose->qbitincl = osk->protinfo.rose->qbitincl; return sk; } static int rose_release(struct socket *sock) { struct sock *sk = sock->sk; if (sk == NULL) return 0; switch (sk->protinfo.rose->state) { case ROSE_STATE_0: rose_disconnect(sk, 0, -1, -1); rose_destroy_socket(sk); break; case ROSE_STATE_2: sk->protinfo.rose->neighbour->use--; rose_disconnect(sk, 0, -1, -1); rose_destroy_socket(sk); break; case ROSE_STATE_1: case ROSE_STATE_3: case ROSE_STATE_4: case ROSE_STATE_5: rose_clear_queues(sk); rose_stop_idletimer(sk); rose_write_internal(sk, ROSE_CLEAR_REQUEST); rose_start_t3timer(sk); sk->protinfo.rose->state = ROSE_STATE_2; sk->state = TCP_CLOSE; sk->shutdown |= SEND_SHUTDOWN; sk->state_change(sk); sk->dead = 1; sk->destroy = 1; break; default: break; } sock->sk = NULL; sk->socket = NULL; /* Not used, but we should do this. **/ return 0; } static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sock *sk = sock->sk; struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; struct net_device *dev; ax25_address *user, *source; int n; if (sk->zapped == 0) return -EINVAL; if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) return -EINVAL; if (addr->srose_family != AF_ROSE) return -EINVAL; if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) return -EINVAL; if (addr->srose_ndigis > ROSE_MAX_DIGIS) return -EINVAL; if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); return -EADDRNOTAVAIL; } source = &addr->srose_call; if ((user = ax25_findbyuid(current->euid)) == NULL) { if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) return -EACCES; user = source; } sk->protinfo.rose->source_addr = addr->srose_addr; sk->protinfo.rose->source_call = *user; sk->protinfo.rose->device = dev; sk->protinfo.rose->source_ndigis = addr->srose_ndigis; if (addr_len == sizeof(struct full_sockaddr_rose)) { struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; for (n = 0 ; n < addr->srose_ndigis ; n++) sk->protinfo.rose->source_digis[n] = full_addr->srose_digis[n]; } else { if (sk->protinfo.rose->source_ndigis == 1) { sk->protinfo.rose->source_digis[0] = addr->srose_digi; } } rose_insert_socket(sk); sk->zapped = 0; SOCK_DEBUG(sk, "ROSE: socket is bound\n"); return 0; } static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; unsigned char cause, diagnostic; ax25_address *user; struct net_device *dev; int n; if (sk->state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { sock->state = SS_CONNECTED; return 0; /* Connect completed during a ERESTARTSYS event */ } if (sk->state == TCP_CLOSE && sock->state == SS_CONNECTING) { sock->state = SS_UNCONNECTED; return -ECONNREFUSED; } if (sk->state == TCP_ESTABLISHED) return -EISCONN; /* No reconnect on a seqpacket socket */ sk->state = TCP_CLOSE; sock->state = SS_UNCONNECTED; if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) return -EINVAL; if (addr->srose_family != AF_ROSE) return -EINVAL; if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) return -EINVAL; if (addr->srose_ndigis > ROSE_MAX_DIGIS) return -EINVAL; /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ if ((sk->protinfo.rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) return -EINVAL; if ((sk->protinfo.rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic)) == NULL) return -ENETUNREACH; if ((sk->protinfo.rose->lci = rose_new_lci(sk->protinfo.rose->neighbour)) == 0) return -ENETUNREACH; if (sk->zapped) { /* Must bind first - autobinding in this may or may not work */ sk->zapped = 0; if ((dev = rose_dev_first()) == NULL) return -ENETUNREACH; if ((user = ax25_findbyuid(current->euid)) == NULL) return -EINVAL; memcpy(&sk->protinfo.rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); sk->protinfo.rose->source_call = *user; sk->protinfo.rose->device = dev; rose_insert_socket(sk); /* Finish the bind */ } sk->protinfo.rose->dest_addr = addr->srose_addr; sk->protinfo.rose->dest_call = addr->srose_call; sk->protinfo.rose->rand = ((int)sk->protinfo.rose & 0xFFFF) + sk->protinfo.rose->lci; sk->protinfo.rose->dest_ndigis = addr->srose_ndigis; if (addr_len == sizeof(struct full_sockaddr_rose)) { struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; for (n = 0 ; n < addr->srose_ndigis ; n++) sk->protinfo.rose->dest_digis[n] = full_addr->srose_digis[n]; } else { if (sk->protinfo.rose->dest_ndigis == 1) { sk->protinfo.rose->dest_digis[0] = addr->srose_digi; } } /* Move to connecting socket, start sending Connect Requests */ sock->state = SS_CONNECTING; sk->state = TCP_SYN_SENT; sk->protinfo.rose->state = ROSE_STATE_1; sk->protinfo.rose->neighbour->use++; rose_write_internal(sk, ROSE_CALL_REQUEST); rose_start_heartbeat(sk); rose_start_t1timer(sk); /* Now the loop */ if (sk->state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) return -EINPROGRESS; cli(); /* To avoid races on the sleep */ /* * A Connect Ack with Choke or timeout or failed routing will go to closed. */ while (sk->state == TCP_SYN_SENT) { interruptible_sleep_on(sk->sleep); if (signal_pending(current)) { sti(); return -ERESTARTSYS; } } if (sk->state != TCP_ESTABLISHED) { sti(); sock->state = SS_UNCONNECTED; return sock_error(sk); /* Always set at this point */ } sock->state = SS_CONNECTED; sti(); return 0; } static int rose_accept(struct socket *sock, struct socket *newsock, int flags) { struct sock *sk; struct sock *newsk; struct sk_buff *skb; if ((sk = sock->sk) == NULL) return -EINVAL; if (sk->type != SOCK_SEQPACKET) return -EOPNOTSUPP; if (sk->state != TCP_LISTEN) return -EINVAL; /* * The write queue this time is holding sockets ready to use * hooked into the SABM we saved */ do { cli(); if ((skb = skb_dequeue(&sk->receive_queue)) == NULL) { if (flags & O_NONBLOCK) { sti(); return -EWOULDBLOCK; } interruptible_sleep_on(sk->sleep); if (signal_pending(current)) { sti(); return -ERESTARTSYS; } } } while (skb == NULL); newsk = skb->sk; newsk->pair = NULL; newsk->socket = newsock; newsk->sleep = &newsock->wait; sti(); /* Now attach up the new socket */ skb->sk = NULL; kfree_skb(skb); sk->ack_backlog--; newsock->sk = newsk; return 0; } static int rose_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; struct sock *sk = sock->sk; int n; if (peer != 0) { if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; srose->srose_family = AF_ROSE; srose->srose_addr = sk->protinfo.rose->dest_addr; srose->srose_call = sk->protinfo.rose->dest_call; srose->srose_ndigis = sk->protinfo.rose->dest_ndigis; for (n = 0 ; n < sk->protinfo.rose->dest_ndigis ; n++) srose->srose_digis[n] = sk->protinfo.rose->dest_digis[n]; } else { srose->srose_family = AF_ROSE; srose->srose_addr = sk->protinfo.rose->source_addr; srose->srose_call = sk->protinfo.rose->source_call; srose->srose_ndigis = sk->protinfo.rose->source_ndigis; for (n = 0 ; n < sk->protinfo.rose->source_ndigis ; n++) srose->srose_digis[n] = sk->protinfo.rose->source_digis[n]; } *uaddr_len = sizeof(struct full_sockaddr_rose); return 0; } int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) { struct sock *sk; struct sock *make; struct rose_facilities_struct facilities; int n, len; skb->sk = NULL; /* Initially we don't know who it's for */ /* * skb->data points to the rose frame start */ memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2; len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2; if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); return 0; } sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); /* * We can't accept the Call Request. */ if (sk == NULL || sk->ack_backlog == sk->max_ack_backlog || (make = rose_make_new(sk)) == NULL) { rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); return 0; } skb->sk = make; make->state = TCP_ESTABLISHED; make->protinfo.rose->lci = lci; make->protinfo.rose->dest_addr = facilities.dest_addr; make->protinfo.rose->dest_call = facilities.dest_call; make->protinfo.rose->dest_ndigis = facilities.dest_ndigis; for (n = 0 ; n < facilities.dest_ndigis ; n++) make->protinfo.rose->dest_digis[n] = facilities.dest_digis[n]; make->protinfo.rose->source_addr = facilities.source_addr; make->protinfo.rose->source_call = facilities.source_call; make->protinfo.rose->source_ndigis = facilities.source_ndigis; for (n = 0 ; n < facilities.source_ndigis ; n++) make->protinfo.rose->source_digis[n]= facilities.source_digis[n]; make->protinfo.rose->neighbour = neigh; make->protinfo.rose->device = dev; make->protinfo.rose->facilities = facilities; make->protinfo.rose->neighbour->use++; if (sk->protinfo.rose->defer) { make->protinfo.rose->state = ROSE_STATE_5; } else { rose_write_internal(make, ROSE_CALL_ACCEPTED); make->protinfo.rose->state = ROSE_STATE_3; rose_start_idletimer(make); } make->protinfo.rose->condition = 0x00; make->protinfo.rose->vs = 0; make->protinfo.rose->va = 0; make->protinfo.rose->vr = 0; make->protinfo.rose->vl = 0; sk->ack_backlog++; make->pair = sk; rose_insert_socket(make); skb_queue_head(&sk->receive_queue, skb); rose_start_heartbeat(make); if (!sk->dead) sk->data_ready(sk, skb->len); return 1; } static int rose_sendmsg(struct socket *sock, struct msghdr *msg, int len, struct scm_cookie *scm) { struct sock *sk = sock->sk; struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; int err; struct full_sockaddr_rose srose; struct sk_buff *skb; unsigned char *asmptr; int n, size, qbit = 0; if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR)) return -EINVAL; if (sk->zapped) return -EADDRNOTAVAIL; if (sk->shutdown & SEND_SHUTDOWN) { send_sig(SIGPIPE, current, 0); return -EPIPE; } if (sk->protinfo.rose->neighbour == NULL || sk->protinfo.rose->device == NULL) return -ENETUNREACH; if (usrose != NULL) { if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) return -EINVAL; memset(&srose, 0, sizeof(struct full_sockaddr_rose)); memcpy(&srose, usrose, msg->msg_namelen); if (rosecmp(&sk->protinfo.rose->dest_addr, &srose.srose_addr) != 0 || ax25cmp(&sk->protinfo.rose->dest_call, &srose.srose_call) != 0) return -EISCONN; if (srose.srose_ndigis != sk->protinfo.rose->dest_ndigis) return -EISCONN; if (srose.srose_ndigis == sk->protinfo.rose->dest_ndigis) { for (n = 0 ; n < srose.srose_ndigis ; n++) if (ax25cmp(&sk->protinfo.rose->dest_digis[n], &srose.srose_digis[n]) != 0) return -EISCONN; } if (srose.srose_family != AF_ROSE) return -EINVAL; } else { if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; srose.srose_family = AF_ROSE; srose.srose_addr = sk->protinfo.rose->dest_addr; srose.srose_call = sk->protinfo.rose->dest_call; srose.srose_ndigis = sk->protinfo.rose->dest_ndigis; for (n = 0 ; n < sk->protinfo.rose->dest_ndigis ; n++) srose.srose_digis[n] = sk->protinfo.rose->dest_digis[n]; } SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); /* Build a packet */ SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) return err; skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); /* * Put the data on the end */ SOCK_DEBUG(sk, "ROSE: Appending user data\n"); asmptr = skb->h.raw = skb_put(skb, len); memcpy_fromiovec(asmptr, msg->msg_iov, len); /* * If the Q BIT Include socket option is in force, the first * byte of the user data is the logical value of the Q Bit. */ if (sk->protinfo.rose->qbitincl) { qbit = skb->data[0]; skb_pull(skb, 1); } /* * Push down the ROSE header */ asmptr = skb_push(skb, ROSE_MIN_LEN); SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); /* Build a ROSE Network header */ asmptr[0] = ((sk->protinfo.rose->lci >> 8) & 0x0F) | ROSE_GFI; asmptr[1] = (sk->protinfo.rose->lci >> 0) & 0xFF; asmptr[2] = ROSE_DATA; if (qbit) asmptr[0] |= ROSE_Q_BIT; SOCK_DEBUG(sk, "ROSE: Built header.\n"); SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); if (sk->state != TCP_ESTABLISHED) { kfree_skb(skb); return -ENOTCONN; } #ifdef M_BIT #define ROSE_PACLEN (256-ROSE_MIN_LEN) if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { unsigned char header[ROSE_MIN_LEN]; struct sk_buff *skbn; int frontlen; int lg; /* Save a copy of the Header */ memcpy(header, skb->data, ROSE_MIN_LEN); skb_pull(skb, ROSE_MIN_LEN); frontlen = skb_headroom(skb); while (skb->len > 0) { if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) return err; skbn->sk = sk; skbn->free = 1; skbn->arp = 1; skb_reserve(skbn, frontlen); lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; /* Copy the user data */ memcpy(skb_put(skbn, lg), skb->data, lg); skb_pull(skb, lg); /* Duplicate the Header */ skb_push(skbn, ROSE_MIN_LEN); memcpy(skbn->data, header, ROSE_MIN_LEN); if (skb->len > 0) skbn->data[2] |= M_BIT; skb_queue_tail(&sk->write_queue, skbn); /* Throw it on the queue */ } skb->free = 1; kfree_skb(skb, FREE_WRITE); } else { skb_queue_tail(&sk->write_queue, skb); /* Throw it on the queue */ } #else skb_queue_tail(&sk->write_queue, skb); /* Shove it onto the queue */ #endif rose_kick(sk); return len; } static int rose_recvmsg(struct socket *sock, struct msghdr *msg, int size, int flags, struct scm_cookie *scm) { struct sock *sk = sock->sk; struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; int copied, qbit; unsigned char *asmptr; struct sk_buff *skb; int n, er; /* * This works for seqpacket too. The receiver has ordered the queue for * us! We do one quick check first though */ if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; /* Now we can treat all alike */ if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) return er; qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; skb_pull(skb, ROSE_MIN_LEN); if (sk->protinfo.rose->qbitincl) { asmptr = skb_push(skb, 1); *asmptr = qbit; } skb->h.raw = skb->data; copied = skb->len; if (copied > size) { copied = size; msg->msg_flags |= MSG_TRUNC; } skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); if (srose != NULL) { srose->srose_family = AF_ROSE; srose->srose_addr = sk->protinfo.rose->dest_addr; srose->srose_call = sk->protinfo.rose->dest_call; srose->srose_ndigis = sk->protinfo.rose->dest_ndigis; if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; for (n = 0 ; n < sk->protinfo.rose->dest_ndigis ; n++) full_srose->srose_digis[n] = sk->protinfo.rose->dest_digis[n]; msg->msg_namelen = sizeof(struct full_sockaddr_rose); } else { if (sk->protinfo.rose->dest_ndigis >= 1) { srose->srose_ndigis = 1; srose->srose_digi = sk->protinfo.rose->dest_digis[0]; } msg->msg_namelen = sizeof(struct sockaddr_rose); } } skb_free_datagram(sk, skb); return copied; } static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; switch (cmd) { case TIOCOUTQ: { long amount; amount = sk->sndbuf - atomic_read(&sk->wmem_alloc); if (amount < 0) amount = 0; return put_user(amount, (unsigned int *)arg); } case TIOCINQ: { struct sk_buff *skb; long amount = 0L; /* These two are safe on a single CPU system as only user tasks fiddle here */ if ((skb = skb_peek(&sk->receive_queue)) != NULL) amount = skb->len; return put_user(amount, (unsigned int *)arg); } case SIOCGSTAMP: if (sk != NULL) { if (sk->stamp.tv_sec == 0) return -ENOENT; return copy_to_user((void *)arg, &sk->stamp, sizeof(struct timeval)) ? -EFAULT : 0; } return -EINVAL; case SIOCGIFADDR: case SIOCSIFADDR: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCGIFMETRIC: case SIOCSIFMETRIC: return -EINVAL; case SIOCADDRT: case SIOCDELRT: case SIOCRSCLRRT: if (!capable(CAP_NET_ADMIN)) return -EPERM; return rose_rt_ioctl(cmd, (void *)arg); case SIOCRSGCAUSE: { struct rose_cause_struct rose_cause; rose_cause.cause = sk->protinfo.rose->cause; rose_cause.diagnostic = sk->protinfo.rose->diagnostic; return copy_to_user((void *)arg, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; } case SIOCRSSCAUSE: { struct rose_cause_struct rose_cause; if (copy_from_user(&rose_cause, (void *)arg, sizeof(struct rose_cause_struct))) return -EFAULT; sk->protinfo.rose->cause = rose_cause.cause; sk->protinfo.rose->diagnostic = rose_cause.diagnostic; return 0; } case SIOCRSSL2CALL: if (!capable(CAP_NET_ADMIN)) return -EPERM; if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) ax25_listen_release(&rose_callsign, NULL); if (copy_from_user(&rose_callsign, (void *)arg, sizeof(ax25_address))) return -EFAULT; if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) ax25_listen_register(&rose_callsign, NULL); return 0; case SIOCRSGL2CALL: return copy_to_user((void *)arg, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; case SIOCRSACCEPT: if (sk->protinfo.rose->state == ROSE_STATE_5) { rose_write_internal(sk, ROSE_CALL_ACCEPTED); rose_start_idletimer(sk); sk->protinfo.rose->condition = 0x00; sk->protinfo.rose->vs = 0; sk->protinfo.rose->va = 0; sk->protinfo.rose->vr = 0; sk->protinfo.rose->vl = 0; sk->protinfo.rose->state = ROSE_STATE_3; } return 0; default: return dev_ioctl(cmd, (void *)arg); } /*NOTREACHED*/ return 0; } static int rose_get_info(char *buffer, char **start, off_t offset, int length) { struct sock *s; struct net_device *dev; const char *devname, *callsign; int len = 0; off_t pos = 0; off_t begin = 0; cli(); len += sprintf(buffer, "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n"); for (s = rose_list; s != NULL; s = s->next) { if ((dev = s->protinfo.rose->device) == NULL) devname = "???"; else devname = dev->name; len += sprintf(buffer + len, "%-10s %-9s ", rose2asc(&s->protinfo.rose->dest_addr), ax2asc(&s->protinfo.rose->dest_call)); if (ax25cmp(&s->protinfo.rose->source_call, &null_ax25_address) == 0) callsign = "??????-?"; else callsign = ax2asc(&s->protinfo.rose->source_call); len += sprintf(buffer + len, "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", rose2asc(&s->protinfo.rose->source_addr), callsign, devname, s->protinfo.rose->lci & 0x0FFF, (s->protinfo.rose->neighbour) ? s->protinfo.rose->neighbour->number : 0, s->protinfo.rose->state, s->protinfo.rose->vs, s->protinfo.rose->vr, s->protinfo.rose->va, ax25_display_timer(&s->protinfo.rose->timer) / HZ, s->protinfo.rose->t1 / HZ, s->protinfo.rose->t2 / HZ, s->protinfo.rose->t3 / HZ, s->protinfo.rose->hb / HZ, ax25_display_timer(&s->protinfo.rose->idletimer) / (60 * HZ), s->protinfo.rose->idle / (60 * HZ), atomic_read(&s->wmem_alloc), atomic_read(&s->rmem_alloc), s->socket != NULL ? s->socket->inode->i_ino : 0L); pos = begin + len; if (pos < offset) { len = 0; begin = pos; } if (pos > offset + length) break; } sti(); *start = buffer + (offset - begin); len -= (offset - begin); if (len > length) len = length; return(len); } static struct net_proto_family rose_family_ops = { family: PF_ROSE, create: rose_create, }; static struct proto_ops SOCKOPS_WRAPPED(rose_proto_ops) = { family: PF_ROSE, release: rose_release, bind: rose_bind, connect: rose_connect, socketpair: sock_no_socketpair, accept: rose_accept, getname: rose_getname, poll: datagram_poll, ioctl: rose_ioctl, listen: rose_listen, shutdown: sock_no_shutdown, setsockopt: rose_setsockopt, getsockopt: rose_getsockopt, sendmsg: rose_sendmsg, recvmsg: rose_recvmsg, mmap: sock_no_mmap, sendpage: sock_no_sendpage, }; #include <linux/smp_lock.h> SOCKOPS_WRAP(rose_proto, PF_ROSE); static struct notifier_block rose_dev_notifier = { notifier_call: rose_device_event, }; static struct net_device *dev_rose; static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n"; static int __init rose_proto_init(void) { int i; rose_callsign = null_ax25_address; if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device)) { printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); return -1; } if ((dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device), GFP_KERNEL)) == NULL) { printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); return -1; } memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device)); for (i = 0; i < rose_ndevs; i++) { sprintf(dev_rose[i].name, "rose%d", i); dev_rose[i].init = rose_init; register_netdev(&dev_rose[i]); } sock_register(&rose_family_ops); register_netdevice_notifier(&rose_dev_notifier); printk(banner); ax25_protocol_register(AX25_P_ROSE, rose_route_frame); ax25_linkfail_register(rose_link_failed); #ifdef CONFIG_SYSCTL rose_register_sysctl(); #endif rose_loopback_init(); rose_add_loopback_neigh(); proc_net_create("rose", 0, rose_get_info); proc_net_create("rose_neigh", 0, rose_neigh_get_info); proc_net_create("rose_nodes", 0, rose_nodes_get_info); proc_net_create("rose_routes", 0, rose_routes_get_info); return 0; } module_init(rose_proto_init); EXPORT_NO_SYMBOLS; MODULE_PARM(rose_ndevs, "i"); MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); static void __exit rose_exit(void) { int i; proc_net_remove("rose"); proc_net_remove("rose_neigh"); proc_net_remove("rose_nodes"); proc_net_remove("rose_routes"); rose_loopback_clear(); rose_rt_free(); ax25_protocol_release(AX25_P_ROSE); ax25_linkfail_release(rose_link_failed); if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) ax25_listen_release(&rose_callsign, NULL); #ifdef CONFIG_SYSCTL rose_unregister_sysctl(); #endif unregister_netdevice_notifier(&rose_dev_notifier); sock_unregister(PF_ROSE); for (i = 0; i < rose_ndevs; i++) { if (dev_rose[i].priv != NULL) { kfree(dev_rose[i].priv); dev_rose[i].priv = NULL; unregister_netdev(&dev_rose[i]); } kfree(dev_rose[i].name); } kfree(dev_rose); } module_exit(rose_exit); |