/********************************************************************* * * Filename: af_irda.c * Version: 0.7 * Description: IrDA sockets implementation * Status: Experimental. * Author: Dag Brattli * Created at: Sun May 31 10:12:43 1998 * Modified at: Mon Sep 27 20:11:52 1999 * Modified by: Dag Brattli * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc. * * Copyright (c) 1999 Dag Brattli, All Rights Reserved. * * 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. * * Neither Dag Brattli nor University of Tromsų admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. * ********************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern int irda_init(void); extern void irda_cleanup(void); extern int irlap_driver_rcv(struct sk_buff *, struct net_device *, struct packet_type *); static int irda_create(struct socket *sock, int protocol); static struct proto_ops irda_stream_ops; static struct proto_ops irda_dgram_ops; static hashbin_t *cachelog = NULL; static DECLARE_WAIT_QUEUE_HEAD(discovery_wait); /* Wait for discovery */ #define IRDA_MAX_HEADER (TTP_MAX_HEADER) /* * Function irda_data_indication (instance, sap, skb) * * Received some data from TinyTP. Just queue it on the receive queue * */ static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb) { struct irda_sock *self; struct sock *sk; int err; self = (struct irda_sock *) instance; ASSERT(self != NULL, return -1;); sk = self->sk; ASSERT(sk != NULL, return -1;); err = sock_queue_rcv_skb(sk, skb); if (err) { DEBUG(1, __FUNCTION__ "(), error: no more mem!\n"); self->rx_flow = FLOW_STOP; /* When we return error, TTP will need to requeue the skb */ return err; } return 0; } /* * Function irda_disconnect_indication (instance, sap, reason, skb) * * Connection has been closed. Chech reason to find out why * */ static void irda_disconnect_indication(void *instance, void *sap, LM_REASON reason, struct sk_buff *skb) { struct irda_sock *self; struct sock *sk; DEBUG(2, __FUNCTION__ "()\n"); self = (struct irda_sock *) instance; sk = self->sk; if (sk == NULL) return; sk->state = TCP_CLOSE; sk->err = reason; sk->shutdown |= SEND_SHUTDOWN; if (!sk->dead) { sk->state_change(sk); sk->dead = 1; } } /* * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb) * * Connections has been confirmed by the remote device * */ static void irda_connect_confirm(void *instance, void *sap, struct qos_info *qos, __u32 max_sdu_size, __u8 max_header_size, struct sk_buff *skb) { struct irda_sock *self; struct sock *sk; DEBUG(2, __FUNCTION__ "()\n"); self = (struct irda_sock *) instance; /* How much header space do we need to reserve */ self->max_header_size = max_header_size; /* IrTTP max SDU size in transmit direction */ self->max_sdu_size_tx = max_sdu_size; /* Find out what the largest chunk of data that we can transmit is */ if (max_sdu_size == SAR_DISABLE) self->max_data_size = irttp_get_max_seq_size(self->tsap); else self->max_data_size = max_sdu_size; DEBUG(1, __FUNCTION__ "(), max_data_size=%d\n", self->max_data_size); memcpy(&self->qos_tx, qos, sizeof(struct qos_info)); sk = self->sk; if (sk == NULL) return; skb_queue_tail(&sk->receive_queue, skb); /* We are now connected! */ sk->state = TCP_ESTABLISHED; sk->state_change(sk); } /* * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata) * * Incomming connection * */ static void irda_connect_indication(void *instance, void *sap, struct qos_info *qos, __u32 max_sdu_size, __u8 max_header_size, struct sk_buff *skb) { struct irda_sock *self; struct sock *sk; DEBUG(2, __FUNCTION__ "()\n"); self = (struct irda_sock *) instance; /* How much header space do we need to reserve */ self->max_header_size = max_header_size; /* IrTTP max SDU size in transmit direction */ self->max_sdu_size_tx = max_sdu_size; /* Find out what the largest chunk of data that we can transmit is */ if (max_sdu_size == SAR_DISABLE) self->max_data_size = irttp_get_max_seq_size(self->tsap); else self->max_data_size = max_sdu_size; DEBUG(1, __FUNCTION__ "(), max_data_size=%d\n", self->max_data_size); memcpy(&self->qos_tx, qos, sizeof(struct qos_info)); sk = self->sk; if (sk == NULL) return; skb_queue_tail(&sk->receive_queue, skb); sk->state_change(sk); } /* * Function irda_connect_response (handle) * * Accept incomming connection * */ void irda_connect_response(struct irda_sock *self) { struct sk_buff *skb; DEBUG(1, __FUNCTION__ "()\n"); ASSERT(self != NULL, return;); skb = dev_alloc_skb(64); if (skb == NULL) { DEBUG(0, __FUNCTION__ "() Unable to allocate sk_buff!\n"); return; } /* Reserve space for MUX_CONTROL and LAP header */ skb_reserve(skb, IRDA_MAX_HEADER); irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb); } /* * Function irda_flow_indication (instance, sap, flow) * * Used by TinyTP to tell us if it can accept more data or not * */ static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow) { struct irda_sock *self; struct sock *sk; DEBUG(1, __FUNCTION__ "()\n"); self = (struct irda_sock *) instance; ASSERT(self != NULL, return;); sk = self->sk; ASSERT(sk != NULL, return;); switch (flow) { case FLOW_STOP: DEBUG(1, __FUNCTION__ "(), IrTTP wants us to slow down\n"); self->tx_flow = flow; break; case FLOW_START: self->tx_flow = flow; DEBUG(1, __FUNCTION__ "(), IrTTP wants us to start again\n"); wake_up_interruptible(sk->sleep); break; default: DEBUG( 0, __FUNCTION__ "(), Unknown flow command!\n"); } } /* * Function irda_get_value_confirm (obj_id, value, priv) * * Got answer from remote LM-IAS * */ static void irda_get_value_confirm(int result, __u16 obj_id, struct ias_value *value, void *priv) { struct irda_sock *self; DEBUG(1, __FUNCTION__ "()\n"); ASSERT(priv != NULL, return;); self = (struct irda_sock *) priv; if (!self) return; /* Check if request succeeded */ if (result != IAS_SUCCESS) { DEBUG(0, __FUNCTION__ "(), IAS query failed!\n"); self->errno = result; /* Wake up any processes waiting for result */ wake_up_interruptible(&self->ias_wait); return; } switch (value->type) { case IAS_INTEGER: DEBUG(4, __FUNCTION__ "() int=%d\n", value->t.integer); if (value->t.integer != -1) { self->dtsap_sel = value->t.integer; } else self->dtsap_sel = 0; break; default: DEBUG(0, __FUNCTION__ "(), bad type!\n"); break; } /* Wake up any processes waiting for result */ wake_up_interruptible(&self->ias_wait); } /* * Function irda_discovery_indication (log) * * Got a discovery log from IrLMP, wake ut any process waiting for answer * */ static void irda_discovery_indication(hashbin_t *log) { DEBUG(1, __FUNCTION__ "()\n"); cachelog = log; /* Wake up process if its waiting for device to be discovered */ wake_up_interruptible(&discovery_wait); } /* * Function irda_open_tsap (self) * * Open local Transport Service Access Point (TSAP) * */ static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name) { notify_t notify; /* Initialize callbacks to be used by the IrDA stack */ irda_notify_init(¬ify); notify.connect_confirm = irda_connect_confirm; notify.connect_indication = irda_connect_indication; notify.disconnect_indication = irda_disconnect_indication; notify.data_indication = irda_data_indication; notify.flow_indication = irda_flow_indication; notify.instance = self; strncpy(notify.name, name, NOTIFY_MAX_NAME); self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT, ¬ify); if (self->tsap == NULL) { DEBUG( 0, __FUNCTION__ "(), Unable to allocate TSAP!\n"); return -1; } /* Remember which TSAP selector we actually got */ self->stsap_sel = self->tsap->stsap_sel; return 0; } /* * Function irda_find_lsap_sel (self, name) * * Try to lookup LSAP selector in remote LM-IAS * */ static int irda_find_lsap_sel(struct irda_sock *self, char *name) { DEBUG(1, __FUNCTION__ "()\n"); ASSERT(self != NULL, return -1;); /* Query remote LM-IAS */ iriap_getvaluebyclass_request(name, "IrDA:TinyTP:LsapSel", self->saddr, self->daddr, irda_get_value_confirm, self); /* Wait for answer */ interruptible_sleep_on(&self->ias_wait); if (self->dtsap_sel) return 0; return -ENETUNREACH; /* May not be true */ } /* * Function irda_getname (sock, uaddr, uaddr_len, peer) * * Return the our own, or peers socket address (sockaddr_irda) * */ static int irda_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { struct sockaddr_irda saddr; struct sock *sk = sock->sk; if (peer) { if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; saddr.sir_family = AF_IRDA; saddr.sir_lsap_sel = sk->protinfo.irda->dtsap_sel; saddr.sir_addr = sk->protinfo.irda->daddr; } else { saddr.sir_family = AF_IRDA; saddr.sir_lsap_sel = sk->protinfo.irda->stsap_sel; saddr.sir_addr = sk->protinfo.irda->saddr; } DEBUG(1, __FUNCTION__ "(), tsap_sel = %#x\n", saddr.sir_lsap_sel); DEBUG(1, __FUNCTION__ "(), addr = %08x\n", saddr.sir_addr); if (*uaddr_len > sizeof (struct sockaddr_irda)) *uaddr_len = sizeof (struct sockaddr_irda); memcpy(uaddr, &saddr, *uaddr_len); return 0; } /* * Function irda_listen (sock, backlog) * * Just move to the listen state * */ static int irda_listen( struct socket *sock, int backlog) { struct sock *sk = sock->sk; if (sk->type == SOCK_STREAM && sk->state != TCP_LISTEN) { sk->max_ack_backlog = backlog; sk->state = TCP_LISTEN; return 0; } return -EOPNOTSUPP; } /* * Function irda_bind (sock, uaddr, addr_len) * * Used by servers to register their well known TSAP * */ static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sock *sk = sock->sk; struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr; struct irda_sock *self; __u16 hints = 0; int err; self = sk->protinfo.irda; ASSERT(self != NULL, return -1;); if ((addr_len < sizeof(struct sockaddr_irda)) || (addr_len > sizeof(struct sockaddr_irda))) return -EINVAL; err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name); if (err < 0) return -ENOMEM; /* Register with LM-IAS */ self->ias_obj = irias_new_object(addr->sir_name, jiffies); irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel", self->stsap_sel); irias_insert_object(self->ias_obj); /* Fill in some default hint bits values */ if (strncmp(addr->sir_name, "OBEX", 4) == 0) hints = irlmp_service_to_hint(S_OBEX); if (hints) self->skey = irlmp_register_service(hints); return 0; } /* * Function irda_accept (sock, newsock, flags) * * Wait for incomming connection * */ static int irda_accept(struct socket *sock, struct socket *newsock, int flags) { struct irda_sock *self, *new; struct sock *sk = sock->sk; struct sock *newsk; struct sk_buff *skb; int err; DEBUG(0, __FUNCTION__ "()\n"); self = sk->protinfo.irda; ASSERT(self != NULL, return -1;); err = irda_create(newsock, sk->protocol); if (err) return err; if (sock->state != SS_UNCONNECTED) return -EINVAL; if ((sk = sock->sk) == NULL) return -EINVAL; if (sk->type != SOCK_STREAM) return -EOPNOTSUPP; if (sk->state != TCP_LISTEN) return -EINVAL; /* * The read queue this time is holding sockets ready to use * hooked into the SABM we saved */ do { if ((skb = skb_dequeue(&sk->receive_queue)) == NULL) { if (flags & O_NONBLOCK) return -EWOULDBLOCK; interruptible_sleep_on(sk->sleep); if (signal_pending(current)) return -ERESTARTSYS; } } while (skb == NULL); newsk = newsock->sk; newsk->state = TCP_ESTABLISHED; new = newsk->protinfo.irda; ASSERT(new != NULL, return -1;); /* Now attach up the new socket */ new->tsap = irttp_dup(self->tsap, new); if (!new->tsap) { DEBUG(0, __FUNCTION__ "(), dup failed!\n"); return -1; } new->stsap_sel = new->tsap->stsap_sel; new->dtsap_sel = new->tsap->dtsap_sel; new->saddr = irttp_get_saddr(new->tsap); new->daddr = irttp_get_daddr(new->tsap); new->max_sdu_size_tx = self->max_sdu_size_tx; new->max_sdu_size_rx = self->max_sdu_size_rx; new->max_data_size = self->max_data_size; new->max_header_size = self->max_header_size; memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info)); /* Clean up the original one to keep it in listen state */ self->tsap->dtsap_sel = self->tsap->lsap->dlsap_sel = LSAP_ANY; self->tsap->lsap->lsap_state = LSAP_DISCONNECTED; skb->sk = NULL; skb->destructor = NULL; kfree_skb(skb); sk->ack_backlog--; newsock->state = SS_CONNECTED; irda_connect_response(new); return 0; } /* * Function irda_connect (sock, uaddr, addr_len, flags) * * Connect to a IrDA device * */ static int irda_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) { struct sock *sk = sock->sk; struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr; struct irda_sock *self; int err; self = sk->protinfo.irda; 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_irda)) return -EINVAL; /* Check if user supplied the required destination device address */ if (!addr->sir_addr) return -EINVAL; self->daddr = addr->sir_addr; DEBUG(1, __FUNCTION__ "(), daddr = %08x\n", self->daddr); /* Query remote LM-IAS */ err = irda_find_lsap_sel(self, addr->sir_name); if (err) { DEBUG(0, __FUNCTION__ "(), connect failed!\n"); return err; } /* Check if we have opened a local TSAP */ if (!self->tsap) irda_open_tsap(self, LSAP_ANY, addr->sir_name); /* Move to connecting socket, start sending Connect Requests */ sock->state = SS_CONNECTING; sk->state = TCP_SYN_SENT; /* Connect to remote device */ err = irttp_connect_request(self->tsap, self->dtsap_sel, self->saddr, self->daddr, NULL, self->max_sdu_size_rx, NULL); if (err) { DEBUG(0, __FUNCTION__ "(), connect failed!\n"); return err; } /* 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; } /* * Function irda_create (sock, protocol) * * Create IrDA socket * */ static int irda_create(struct socket *sock, int protocol) { struct sock *sk; struct irda_sock *self; DEBUG(2, __FUNCTION__ "()\n"); /* Check for valid socket type */ switch (sock->type) { case SOCK_STREAM: /* FALLTHROUGH */ case SOCK_SEQPACKET: break; default: return -ESOCKTNOSUPPORT; } /* Allocate socket */ if ((sk = sk_alloc(PF_IRDA, GFP_ATOMIC, 1)) == NULL) return -ENOMEM; self = kmalloc(sizeof(struct irda_sock), GFP_ATOMIC); if (self == NULL) return -ENOMEM; memset(self, 0, sizeof(struct irda_sock)); init_waitqueue_head(&self->ias_wait); self->sk = sk; sk->protinfo.irda = self; sock_init_data(sock, sk); if (sock->type == SOCK_STREAM) sock->ops = &irda_stream_ops; else sock->ops = &irda_dgram_ops; sk->protocol = protocol; /* Register as a client with IrLMP */ self->ckey = irlmp_register_client(0, NULL, NULL); self->mask = 0xffff; self->rx_flow = self->tx_flow = FLOW_START; self->max_sdu_size_rx = SAR_DISABLE; /* Default value */ self->nslots = DISCOVERY_DEFAULT_SLOTS; /* Notify that we are using the irda module, so nobody removes it */ irda_mod_inc_use_count(); return 0; } /* * Function irda_destroy_socket (self) * * Destroy socket * */ void irda_destroy_socket(struct irda_sock *self) { DEBUG(2, __FUNCTION__ "()\n"); ASSERT(self != NULL, return;); /* Unregister with IrLMP */ irlmp_unregister_client(self->ckey); irlmp_unregister_service(self->skey); /* Unregister with LM-IAS */ if (self->ias_obj) irias_delete_object(self->ias_obj); if (self->tsap) { irttp_disconnect_request(self->tsap, NULL, P_NORMAL); irttp_close_tsap(self->tsap); self->tsap = NULL; } kfree(self); /* Notify that we are not using the irda module anymore */ irda_mod_dec_use_count(); return; } /* * Function irda_release (sock, peer) * * * */ static int irda_release(struct socket *sock) { struct sock *sk = sock->sk; DEBUG(1, __FUNCTION__ "()\n"); if (sk == NULL) return 0; sk->state = TCP_CLOSE; sk->shutdown |= SEND_SHUTDOWN; sk->state_change(sk); sk->dead = 1; irda_destroy_socket(sk->protinfo.irda); sock->sk = NULL; sk->socket = NULL; /* Not used, but we should do this. */ return 0; } /* * Function irda_sendmsg (sock, msg, len, scm) * * Send message down to TinyTP * */ static int irda_sendmsg(struct socket *sock, struct msghdr *msg, int len, struct scm_cookie *scm) { struct sock *sk = sock->sk; /* struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name; */ struct irda_sock *self; struct sk_buff *skb; unsigned char *asmptr; int err; DEBUG(4, __FUNCTION__ "(), len=%d\n", len); if (msg->msg_flags & ~MSG_DONTWAIT) return -EINVAL; if (sk->shutdown & SEND_SHUTDOWN) { send_sig(SIGPIPE, current, 0); return -EPIPE; } self = sk->protinfo.irda; ASSERT(self != NULL, return -1;); /* Check if IrTTP is wants us to slow down */ while (self->tx_flow == FLOW_STOP) { DEBUG(2, __FUNCTION__ "(), IrTTP is busy, going to sleep!\n"); interruptible_sleep_on(sk->sleep); /* Check if we are still connected */ if (sk->state != TCP_ESTABLISHED) return -ENOTCONN; } /* Check that we don't send out to big frames */ if (len > self->max_data_size) { DEBUG(0, __FUNCTION__ "(), Warning to much data! " "Chopping frame from %d to %d bytes!\n", len, self->max_data_size); len = self->max_data_size; } skb = sock_alloc_send_skb(sk, len + self->max_header_size, 0, msg->msg_flags & MSG_DONTWAIT, &err); if (!skb) return -ENOBUFS; skb_reserve(skb, self->max_header_size); DEBUG(4, __FUNCTION__ "(), appending user data\n"); asmptr = skb->h.raw = skb_put(skb, len); memcpy_fromiovec(asmptr, msg->msg_iov, len); /* * Just send the message to TinyTP, and let it deal with possible * errors. No need to duplicate all that here */ err = irttp_data_request(self->tsap, skb); if (err) { DEBUG(0, __FUNCTION__ "(), err=%d\n", err); return err; } return len; } /* * Function irda_recvmsg (sock, msg, size, flags, scm) * * Try to receive message and copy it to user * */ static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg, int size, int flags, struct scm_cookie *scm) { struct irda_sock *self; struct sock *sk = sock->sk; struct sk_buff *skb; int copied, err; DEBUG(4, __FUNCTION__ "()\n"); self = sk->protinfo.irda; ASSERT(self != NULL, return -1;); skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &err); if (!skb) return err; 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); skb_free_datagram(sk, skb); /* * Check if we have previously stopped IrTTP and we know * have more free space in our rx_queue. If so tell IrTTP * to start delivering frames again before our rx_queue gets * empty */ if (self->rx_flow == FLOW_STOP) { if ((atomic_read(&sk->rmem_alloc) << 2) <= sk->rcvbuf) { DEBUG(2, __FUNCTION__ "(), Starting IrTTP\n"); self->rx_flow = FLOW_START; irttp_flow_request(self->tsap, FLOW_START); } } return copied; } /* * Function irda_data_wait (sk) * * Sleep until data has arrive. But check for races.. * */ static void irda_data_wait(struct sock *sk) { if (!skb_peek(&sk->receive_queue)) { sk->socket->flags |= SO_WAITDATA; interruptible_sleep_on(sk->sleep); sk->socket->flags &= ~SO_WAITDATA; } } /* * Function irda_recvmsg_stream (sock, msg, size, flags, scm) * * * */ static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg, int size, int flags, struct scm_cookie *scm) { struct irda_sock *self; struct sock *sk = sock->sk; int noblock = flags & MSG_DONTWAIT; int copied = 0; int target = 1; DEBUG(3, __FUNCTION__ "()\n"); self = sk->protinfo.irda; ASSERT(self != NULL, return -1;); if (sock->flags & SO_ACCEPTCON) return(-EINVAL); if (flags & MSG_OOB) return -EOPNOTSUPP; if (flags & MSG_WAITALL) target = size; msg->msg_namelen = 0; /* Lock the socket to prevent queue disordering * while sleeps in memcpy_tomsg */ /* down(&self->readsem); */ do { int chunk; struct sk_buff *skb; skb=skb_dequeue(&sk->receive_queue); if (skb==NULL) { if (copied >= target) break; /* * POSIX 1003.1g mandates this order. */ if (sk->err) { /* up(&self->readsem); */ return sock_error(sk); } if (sk->shutdown & RCV_SHUTDOWN) break; /* up(&self->readsem); */ if (noblock) return -EAGAIN; irda_data_wait(sk); if (signal_pending(current)) return -ERESTARTSYS; /* down(&self->readsem); */ continue; } /* Never glue messages from different writers */ /* if (check_creds && */ /* memcmp(UNIXCREDS(skb), &scm->creds, sizeof(scm->creds)) != 0) */ /* { */ /* skb_queue_head(&sk->receive_queue, skb); */ /* break; */ /* } */ chunk = min(skb->len, size); if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { skb_queue_head(&sk->receive_queue, skb); if (copied == 0) copied = -EFAULT; break; } copied += chunk; size -= chunk; /* Copy credentials */ /* scm->creds = *UNIXCREDS(skb); */ /* check_creds = 1; */ /* Mark read part of skb as used */ if (!(flags & MSG_PEEK)) { skb_pull(skb, chunk); /* if (UNIXCB(skb).fp) */ /* unix_detach_fds(scm, skb); */ /* put the skb back if we didn't use it up.. */ if (skb->len) { DEBUG(1, __FUNCTION__ "(), back on q!\n"); skb_queue_head(&sk->receive_queue, skb); break; } kfree_skb(skb); /* if (scm->fp) */ /* break; */ } else { DEBUG(0, __FUNCTION__ "() questionable!?\n"); /* It is questionable, see note in unix_dgram_recvmsg. */ /* if (UNIXCB(skb).fp) */ /* scm->fp = scm_fp_dup(UNIXCB(skb).fp); */ /* put message back and return */ skb_queue_head(&sk->receive_queue, skb); break; } } while (size); /* * Check if we have previously stopped IrTTP and we know * have more free space in our rx_queue. If so tell IrTTP * to start delivering frames again before our rx_queue gets * empty */ if (self->rx_flow == FLOW_STOP) { if ((atomic_read(&sk->rmem_alloc) << 2) <= sk->rcvbuf) { DEBUG(2, __FUNCTION__ "(), Starting IrTTP\n"); self->rx_flow = FLOW_START; irttp_flow_request(self->tsap, FLOW_START); } } /* up(&self->readsem); */ return copied; } /* * Function irda_shutdown (sk, how) * * * */ static int irda_shutdown( struct socket *sk, int how) { DEBUG( 0, __FUNCTION__ "()\n"); /* FIXME - generate DM and RNR states */ return -EOPNOTSUPP; } /* * Function irda_poll (file, sock, wait) * * * */ static unsigned int irda_poll(struct file * file, struct socket *sock, poll_table *wait) { struct sock *sk = sock->sk; unsigned int mask; DEBUG(1, __FUNCTION__ "()\n"); poll_wait(file, sk->sleep, wait); mask = 0; /* exceptional events? */ if (sk->err) mask |= POLLERR; if (sk->shutdown & RCV_SHUTDOWN) mask |= POLLHUP; /* readable? */ if (!skb_queue_empty(&sk->receive_queue)) mask |= POLLIN | POLLRDNORM; /* Connection-based need to check for termination and startup */ if (sk->type == SOCK_STREAM && sk->state==TCP_CLOSE) mask |= POLLHUP; /* * we set writable also when the other side has shut down the * connection. This prevents stuck sockets. */ if (sk->sndbuf - (int)atomic_read(&sk->wmem_alloc) >= MIN_WRITE_SPACE) mask |= POLLOUT | POLLWRNORM | POLLWRBAND; return mask; } /* * Function irda_ioctl (sock, cmd, arg) * * * */ static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; DEBUG(4, __FUNCTION__ "(), cmd=%#x\n", cmd); switch (cmd) { case TIOCOUTQ: { long amount; amount = sk->sndbuf - atomic_read(&sk->wmem_alloc); if (amount < 0) amount = 0; if (put_user(amount, (unsigned int *)arg)) return -EFAULT; return 0; } 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; if (put_user(amount, (unsigned int *)arg)) return -EFAULT; return 0; } case SIOCGSTAMP: if (sk != NULL) { if (sk->stamp.tv_sec == 0) return -ENOENT; if (copy_to_user((void *)arg, &sk->stamp, sizeof(struct timeval))) return -EFAULT; return 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; default: DEBUG(1, __FUNCTION__ "(), doing device ioctl!\n"); return dev_ioctl(cmd, (void *) arg); } /*NOTREACHED*/ return 0; } /* * Function irda_setsockopt (sock, level, optname, optval, optlen) * * Set some options for the socket * */ static int irda_setsockopt(struct socket *sock, int level, int optname, char *optval, int optlen) { struct sock *sk = sock->sk; struct irda_sock *self; int opt; self = sk->protinfo.irda; ASSERT(self != NULL, return -1;); if (level != SOL_IRLMP) return -ENOPROTOOPT; if (optlen < sizeof(int)) return -EINVAL; if (get_user(opt, (int *)optval)) return -EFAULT; switch (optname) { case IRLMP_IAS_SET: DEBUG(0, __FUNCTION__ "(), sorry not impl. yet!\n"); return 0; case IRTTP_MAX_SDU_SIZE: DEBUG(2, __FUNCTION__ "(), setting max_sdu_size = %d\n", opt); self->max_sdu_size_rx = opt; break; default: return -ENOPROTOOPT; } return 0; } /* * Function irda_getsockopt (sock, level, optname, optval, optlen) * * * */ static int irda_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { struct sock *sk = sock->sk; struct irda_sock *self; struct irda_device_list list; struct irda_device_info *info; discovery_t *discovery; int val = 0; int len = 0; int offset, total; self = sk->protinfo.irda; if (level != SOL_IRLMP) return -ENOPROTOOPT; if (get_user(len, optlen)) return -EFAULT; switch (optname) { case IRLMP_ENUMDEVICES: /* Tell IrLMP we want to be notified */ irlmp_update_client(self->ckey, self->mask, NULL, irda_discovery_indication); /* Do some discovery */ irlmp_discovery_request(self->nslots); /* Check if the we got some results */ if (!cachelog) return -EAGAIN; info = &list.dev[0]; /* Offset to first device entry */ offset = sizeof(struct irda_device_list) - sizeof(struct irda_device_info); total = offset; /* Initialized to size of the device list */ list.len = 0; /* Initialize lenght of list */ /* * Now, check all discovered devices (if any), and notify * client only about the services that the client is * interested in */ discovery = (discovery_t *) hashbin_get_first(cachelog); while (discovery != NULL) { /* Mask out the ones we don't want */ if (discovery->hints.word & self->mask) { /* Check if room for this device entry */ if (len - total >= sizeof(struct irda_device_info)) break; /* Copy discovery information */ info->saddr = discovery->saddr; info->daddr = discovery->daddr; info->charset = discovery->charset; info->hints[0] = discovery->hints.byte[0]; info->hints[1] = discovery->hints.byte[1]; strncpy(info->info, discovery->nickname, NICKNAME_MAX_LEN); if (copy_to_user(optval+offset, &info, sizeof(struct irda_device_info))) return -EFAULT; list.len++; total += sizeof(struct irda_device_info); } discovery = (discovery_t *) hashbin_get_next(cachelog); } cachelog = NULL; /* Write total number of bytes used back to client */ if (put_user(total, optlen)) return -EFAULT; /* Write total list length back to client */ if (copy_to_user(optval, &list, sizeof(struct irda_device_list) - sizeof(struct irda_device_info))) return -EFAULT; break; case IRTTP_MAX_SDU_SIZE: val = self->max_data_size; DEBUG(2, __FUNCTION__ "(), getting max_sdu_size = %d\n", val); len = sizeof(int); if (put_user(len, optlen)) return -EFAULT; if (copy_to_user(optval, &val, len)) return -EFAULT; break; default: return -ENOPROTOOPT; } return 0; } static struct net_proto_family irda_family_ops = { PF_IRDA, irda_create }; static struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = { PF_IRDA, irda_release, irda_bind, irda_connect, sock_no_socketpair, irda_accept, irda_getname, irda_poll, irda_ioctl, irda_listen, irda_shutdown, irda_setsockopt, irda_getsockopt, sock_no_fcntl, irda_sendmsg, irda_recvmsg_stream, sock_no_mmap }; static struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = { PF_IRDA, irda_release, irda_bind, irda_connect, sock_no_socketpair, irda_accept, irda_getname, datagram_poll, irda_ioctl, irda_listen, irda_shutdown, irda_setsockopt, irda_getsockopt, sock_no_fcntl, irda_sendmsg, irda_recvmsg_dgram, sock_no_mmap }; #include SOCKOPS_WRAP(irda_dgram, PF_IRDA); SOCKOPS_WRAP(irda_stream, PF_IRDA); /* * Function irda_device_event (this, event, ptr) * * Called when a device is taken up or down * */ static int irda_device_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = (struct net_device *) ptr; /* Reject non IrDA devices */ if (dev->type != ARPHRD_IRDA) return NOTIFY_DONE; switch (event) { case NETDEV_UP: DEBUG(3, __FUNCTION__ "(), NETDEV_UP\n"); /* irda_dev_device_up(dev); */ break; case NETDEV_DOWN: DEBUG(3, __FUNCTION__ "(), NETDEV_DOWN\n"); /* irda_kill_by_device(dev); */ /* irda_rt_device_down(dev); */ /* irda_dev_device_down(dev); */ break; default: break; } return NOTIFY_DONE; } static struct packet_type irda_packet_type = { 0, /* MUTTER ntohs(ETH_P_IRDA),*/ NULL, irlap_driver_rcv, NULL, NULL, }; static struct notifier_block irda_dev_notifier = { irda_device_event, NULL, 0 }; /* * Function irda_proto_init (pro) * * Initialize IrDA protocol layer * */ void __init irda_proto_init(struct net_proto *pro) { sock_register(&irda_family_ops); irda_packet_type.type = htons(ETH_P_IRDA); dev_add_pack(&irda_packet_type); register_netdevice_notifier(&irda_dev_notifier); irda_init(); } /* * Function irda_proto_cleanup (void) * * Remove IrDA protocol layer * */ #ifdef MODULE void irda_proto_cleanup(void) { irda_packet_type.type = htons(ETH_P_IRDA); dev_remove_pack(&irda_packet_type); unregister_netdevice_notifier(&irda_dev_notifier); sock_unregister(PF_IRDA); irda_cleanup(); return; } #endif /* MODULE */