WSL2-Linux-Kernel/net/irda/irlan/irlan_common.c

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C
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/*********************************************************************
*
* Filename: irlan_common.c
* Version: 0.9
* Description: IrDA LAN Access Protocol Implementation
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sun Aug 31 20:14:37 1997
* Modified at: Sun Dec 26 21:53:10 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>,
* 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 Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 11:04:11 +03:00
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/random.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/moduleparam.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irlmp.h>
#include <net/irda/iriap.h>
#include <net/irda/timer.h>
#include <net/irda/irlan_common.h>
#include <net/irda/irlan_client.h>
#include <net/irda/irlan_provider.h>
#include <net/irda/irlan_eth.h>
#include <net/irda/irlan_filter.h>
/* extern char sysctl_devname[]; */
/*
* Master structure
*/
static LIST_HEAD(irlans);
static void *ckey;
static void *skey;
/* Module parameters */
static bool eth; /* Use "eth" or "irlan" name for devices */
static int access = ACCESS_PEER; /* PEER, DIRECT or HOSTED */
#ifdef CONFIG_PROC_FS
static const char *const irlan_access[] = {
"UNKNOWN",
"DIRECT",
"PEER",
"HOSTED"
};
static const char *const irlan_media[] = {
"UNKNOWN",
"802.3",
"802.5"
};
extern struct proc_dir_entry *proc_irda;
static int irlan_seq_open(struct inode *inode, struct file *file);
static const struct file_operations irlan_fops = {
.owner = THIS_MODULE,
.open = irlan_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
extern struct proc_dir_entry *proc_irda;
#endif /* CONFIG_PROC_FS */
static struct irlan_cb __init *irlan_open(__u32 saddr, __u32 daddr);
static void __irlan_close(struct irlan_cb *self);
static int __irlan_insert_param(struct sk_buff *skb, char *param, int type,
__u8 value_byte, __u16 value_short,
__u8 *value_array, __u16 value_len);
static void irlan_open_unicast_addr(struct irlan_cb *self);
static void irlan_get_unicast_addr(struct irlan_cb *self);
void irlan_close_tsaps(struct irlan_cb *self);
/*
* Function irlan_init (void)
*
* Initialize IrLAN layer
*
*/
static int __init irlan_init(void)
{
struct irlan_cb *new;
__u16 hints;
#ifdef CONFIG_PROC_FS
{ struct proc_dir_entry *proc;
proc = proc_create("irlan", 0, proc_irda, &irlan_fops);
if (!proc) {
printk(KERN_ERR "irlan_init: can't create /proc entry!\n");
return -ENODEV;
}
}
#endif /* CONFIG_PROC_FS */
hints = irlmp_service_to_hint(S_LAN);
/* Register with IrLMP as a client */
ckey = irlmp_register_client(hints, &irlan_client_discovery_indication,
NULL, NULL);
if (!ckey)
goto err_ckey;
/* Register with IrLMP as a service */
skey = irlmp_register_service(hints);
if (!skey)
goto err_skey;
/* Start the master IrLAN instance (the only one for now) */
new = irlan_open(DEV_ADDR_ANY, DEV_ADDR_ANY);
if (!new)
goto err_open;
/* The master will only open its (listen) control TSAP */
irlan_provider_open_ctrl_tsap(new);
/* Do some fast discovery! */
irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);
return 0;
err_open:
irlmp_unregister_service(skey);
err_skey:
irlmp_unregister_client(ckey);
err_ckey:
#ifdef CONFIG_PROC_FS
remove_proc_entry("irlan", proc_irda);
#endif /* CONFIG_PROC_FS */
return -ENOMEM;
}
static void __exit irlan_cleanup(void)
{
struct irlan_cb *self, *next;
irlmp_unregister_client(ckey);
irlmp_unregister_service(skey);
#ifdef CONFIG_PROC_FS
remove_proc_entry("irlan", proc_irda);
#endif /* CONFIG_PROC_FS */
/* Cleanup any leftover network devices */
rtnl_lock();
list_for_each_entry_safe(self, next, &irlans, dev_list) {
__irlan_close(self);
}
rtnl_unlock();
}
/*
* Function irlan_open (void)
*
* Open new instance of a client/provider, we should only register the
* network device if this instance is ment for a particular client/provider
*/
static struct irlan_cb __init *irlan_open(__u32 saddr, __u32 daddr)
{
struct net_device *dev;
struct irlan_cb *self;
/* Create network device with irlan */
dev = alloc_irlandev(eth ? "eth%d" : "irlan%d");
if (!dev)
return NULL;
self = netdev_priv(dev);
self->dev = dev;
/*
* Initialize local device structure
*/
self->magic = IRLAN_MAGIC;
self->saddr = saddr;
self->daddr = daddr;
/* Provider access can only be PEER, DIRECT, or HOSTED */
self->provider.access_type = access;
if (access == ACCESS_DIRECT) {
/*
* Since we are emulating an IrLAN sever we will have to
* give ourself an ethernet address!
*/
dev->dev_addr[0] = 0x40;
dev->dev_addr[1] = 0x00;
dev->dev_addr[2] = 0x00;
dev->dev_addr[3] = 0x00;
get_random_bytes(dev->dev_addr+4, 1);
get_random_bytes(dev->dev_addr+5, 1);
}
self->media = MEDIA_802_3;
self->disconnect_reason = LM_USER_REQUEST;
init_timer(&self->watchdog_timer);
init_timer(&self->client.kick_timer);
init_waitqueue_head(&self->open_wait);
skb_queue_head_init(&self->client.txq);
irlan_next_client_state(self, IRLAN_IDLE);
irlan_next_provider_state(self, IRLAN_IDLE);
if (register_netdev(dev)) {
pr_debug("%s(), register_netdev() failed!\n",
__func__);
self = NULL;
free_netdev(dev);
} else {
rtnl_lock();
list_add_rcu(&self->dev_list, &irlans);
rtnl_unlock();
}
return self;
}
/*
* Function __irlan_close (self)
*
* This function closes and deallocates the IrLAN client instances. Be
* aware that other functions which calls client_close() must
* remove self from irlans list first.
*/
static void __irlan_close(struct irlan_cb *self)
{
ASSERT_RTNL();
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
del_timer_sync(&self->watchdog_timer);
del_timer_sync(&self->client.kick_timer);
/* Close all open connections and remove TSAPs */
irlan_close_tsaps(self);
if (self->client.iriap)
iriap_close(self->client.iriap);
/* Remove frames queued on the control channel */
skb_queue_purge(&self->client.txq);
/* Unregister and free self via destructor */
unregister_netdevice(self->dev);
}
/* Find any instance of irlan, used for client discovery wakeup */
struct irlan_cb *irlan_get_any(void)
{
struct irlan_cb *self;
list_for_each_entry_rcu(self, &irlans, dev_list) {
return self;
}
return NULL;
}
/*
* Function irlan_connect_indication (instance, sap, qos, max_sdu_size, skb)
*
* Here we receive the connect indication for the data channel
*
*/
static void irlan_connect_indication(void *instance, void *sap,
struct qos_info *qos,
__u32 max_sdu_size,
__u8 max_header_size,
struct sk_buff *skb)
{
struct irlan_cb *self;
struct tsap_cb *tsap;
self = instance;
tsap = sap;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
IRDA_ASSERT(tsap == self->tsap_data,return;);
self->max_sdu_size = max_sdu_size;
self->max_header_size = max_header_size;
pr_debug("%s: We are now connected!\n", __func__);
del_timer(&self->watchdog_timer);
/* If you want to pass the skb to *both* state machines, you will
* need to skb_clone() it, so that you don't free it twice.
* As the state machines don't need it, git rid of it here...
* Jean II */
if (skb)
dev_kfree_skb(skb);
irlan_do_provider_event(self, IRLAN_DATA_CONNECT_INDICATION, NULL);
irlan_do_client_event(self, IRLAN_DATA_CONNECT_INDICATION, NULL);
if (self->provider.access_type == ACCESS_PEER) {
/*
* Data channel is open, so we are now allowed to
* configure the remote filter
*/
irlan_get_unicast_addr(self);
irlan_open_unicast_addr(self);
}
/* Ready to transfer Ethernet frames (at last) */
netif_start_queue(self->dev); /* Clear reason */
}
static void irlan_connect_confirm(void *instance, void *sap,
struct qos_info *qos,
__u32 max_sdu_size,
__u8 max_header_size,
struct sk_buff *skb)
{
struct irlan_cb *self;
self = instance;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
self->max_sdu_size = max_sdu_size;
self->max_header_size = max_header_size;
/* TODO: we could set the MTU depending on the max_sdu_size */
pr_debug("%s: We are now connected!\n", __func__);
del_timer(&self->watchdog_timer);
/*
* Data channel is open, so we are now allowed to configure the remote
* filter
*/
irlan_get_unicast_addr(self);
irlan_open_unicast_addr(self);
/* Open broadcast and multicast filter by default */
irlan_set_broadcast_filter(self, TRUE);
irlan_set_multicast_filter(self, TRUE);
/* Ready to transfer Ethernet frames */
netif_start_queue(self->dev);
self->disconnect_reason = 0; /* Clear reason */
wake_up_interruptible(&self->open_wait);
}
/*
* Function irlan_client_disconnect_indication (handle)
*
* Callback function for the IrTTP layer. Indicates a disconnection of
* the specified connection (handle)
*/
static void irlan_disconnect_indication(void *instance,
void *sap, LM_REASON reason,
struct sk_buff *userdata)
{
struct irlan_cb *self;
struct tsap_cb *tsap;
pr_debug("%s(), reason=%d\n", __func__ , reason);
self = instance;
tsap = sap;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
IRDA_ASSERT(tsap != NULL, return;);
IRDA_ASSERT(tsap->magic == TTP_TSAP_MAGIC, return;);
IRDA_ASSERT(tsap == self->tsap_data, return;);
pr_debug("IrLAN, data channel disconnected by peer!\n");
/* Save reason so we know if we should try to reconnect or not */
self->disconnect_reason = reason;
switch (reason) {
case LM_USER_REQUEST: /* User request */
pr_debug("%s(), User requested\n", __func__);
break;
case LM_LAP_DISCONNECT: /* Unexpected IrLAP disconnect */
pr_debug("%s(), Unexpected IrLAP disconnect\n", __func__);
break;
case LM_CONNECT_FAILURE: /* Failed to establish IrLAP connection */
pr_debug("%s(), IrLAP connect failed\n", __func__);
break;
case LM_LAP_RESET: /* IrLAP reset */
pr_debug("%s(), IrLAP reset\n", __func__);
break;
case LM_INIT_DISCONNECT:
pr_debug("%s(), IrLMP connect failed\n", __func__);
break;
default:
net_err_ratelimited("%s(), Unknown disconnect reason\n",
__func__);
break;
}
/* If you want to pass the skb to *both* state machines, you will
* need to skb_clone() it, so that you don't free it twice.
* As the state machines don't need it, git rid of it here...
* Jean II */
if (userdata)
dev_kfree_skb(userdata);
irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
wake_up_interruptible(&self->open_wait);
}
void irlan_open_data_tsap(struct irlan_cb *self)
{
struct tsap_cb *tsap;
notify_t notify;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/* Check if already open */
if (self->tsap_data)
return;
irda_notify_init(&notify);
notify.data_indication = irlan_eth_receive;
notify.udata_indication = irlan_eth_receive;
notify.connect_indication = irlan_connect_indication;
notify.connect_confirm = irlan_connect_confirm;
notify.flow_indication = irlan_eth_flow_indication;
notify.disconnect_indication = irlan_disconnect_indication;
notify.instance = self;
strlcpy(notify.name, "IrLAN data", sizeof(notify.name));
tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT, &notify);
if (!tsap) {
pr_debug("%s(), Got no tsap!\n", __func__);
return;
}
self->tsap_data = tsap;
/*
* This is the data TSAP selector which we will pass to the client
* when the client ask for it.
*/
self->stsap_sel_data = self->tsap_data->stsap_sel;
}
void irlan_close_tsaps(struct irlan_cb *self)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/* Disconnect and close all open TSAP connections */
if (self->tsap_data) {
irttp_disconnect_request(self->tsap_data, NULL, P_NORMAL);
irttp_close_tsap(self->tsap_data);
self->tsap_data = NULL;
}
if (self->client.tsap_ctrl) {
irttp_disconnect_request(self->client.tsap_ctrl, NULL,
P_NORMAL);
irttp_close_tsap(self->client.tsap_ctrl);
self->client.tsap_ctrl = NULL;
}
if (self->provider.tsap_ctrl) {
irttp_disconnect_request(self->provider.tsap_ctrl, NULL,
P_NORMAL);
irttp_close_tsap(self->provider.tsap_ctrl);
self->provider.tsap_ctrl = NULL;
}
self->disconnect_reason = LM_USER_REQUEST;
}
/*
* Function irlan_ias_register (self, tsap_sel)
*
* Register with LM-IAS
*
*/
void irlan_ias_register(struct irlan_cb *self, __u8 tsap_sel)
{
struct ias_object *obj;
struct ias_value *new_value;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/*
* Check if object has already been registered by a previous provider.
* If that is the case, we just change the value of the attribute
*/
if (!irias_find_object("IrLAN")) {
obj = irias_new_object("IrLAN", IAS_IRLAN_ID);
irias_add_integer_attrib(obj, "IrDA:TinyTP:LsapSel", tsap_sel,
IAS_KERNEL_ATTR);
irias_insert_object(obj);
} else {
new_value = irias_new_integer_value(tsap_sel);
irias_object_change_attribute("IrLAN", "IrDA:TinyTP:LsapSel",
new_value);
}
/* Register PnP object only if not registered before */
if (!irias_find_object("PnP")) {
obj = irias_new_object("PnP", IAS_PNP_ID);
#if 0
irias_add_string_attrib(obj, "Name", sysctl_devname,
IAS_KERNEL_ATTR);
#else
irias_add_string_attrib(obj, "Name", "Linux", IAS_KERNEL_ATTR);
#endif
irias_add_string_attrib(obj, "DeviceID", "HWP19F0",
IAS_KERNEL_ATTR);
irias_add_integer_attrib(obj, "CompCnt", 1, IAS_KERNEL_ATTR);
if (self->provider.access_type == ACCESS_PEER)
irias_add_string_attrib(obj, "Comp#01", "PNP8389",
IAS_KERNEL_ATTR);
else
irias_add_string_attrib(obj, "Comp#01", "PNP8294",
IAS_KERNEL_ATTR);
irias_add_string_attrib(obj, "Manufacturer",
"Linux-IrDA Project", IAS_KERNEL_ATTR);
irias_insert_object(obj);
}
}
/*
* Function irlan_run_ctrl_tx_queue (self)
*
* Try to send the next command in the control transmit queue
*
*/
int irlan_run_ctrl_tx_queue(struct irlan_cb *self)
{
struct sk_buff *skb;
if (irda_lock(&self->client.tx_busy) == FALSE)
return -EBUSY;
skb = skb_dequeue(&self->client.txq);
if (!skb) {
self->client.tx_busy = FALSE;
return 0;
}
/* Check that it's really possible to send commands */
if ((self->client.tsap_ctrl == NULL) ||
(self->client.state == IRLAN_IDLE))
{
self->client.tx_busy = FALSE;
dev_kfree_skb(skb);
return -1;
}
pr_debug("%s(), sending ...\n", __func__);
return irttp_data_request(self->client.tsap_ctrl, skb);
}
/*
* Function irlan_ctrl_data_request (self, skb)
*
* This function makes sure that commands on the control channel is being
* sent in a command/response fashion
*/
static void irlan_ctrl_data_request(struct irlan_cb *self, struct sk_buff *skb)
{
/* Queue command */
skb_queue_tail(&self->client.txq, skb);
/* Try to send command */
irlan_run_ctrl_tx_queue(self);
}
/*
* Function irlan_get_provider_info (self)
*
* Send Get Provider Information command to peer IrLAN layer
*
*/
void irlan_get_provider_info(struct irlan_cb *self)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER,
GFP_ATOMIC);
if (!skb)
return;
/* Reserve space for TTP, LMP, and LAP header */
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
frame[0] = CMD_GET_PROVIDER_INFO;
frame[1] = 0x00; /* Zero parameters */
irlan_ctrl_data_request(self, skb);
}
/*
* Function irlan_open_data_channel (self)
*
* Send an Open Data Command to provider
*
*/
void irlan_open_data_channel(struct irlan_cb *self)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_STRING_PARAMETER_LEN("MEDIA", "802.3") +
IRLAN_STRING_PARAMETER_LEN("ACCESS_TYPE", "DIRECT"),
GFP_ATOMIC);
if (!skb)
return;
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
/* Build frame */
frame[0] = CMD_OPEN_DATA_CHANNEL;
frame[1] = 0x02; /* Two parameters */
irlan_insert_string_param(skb, "MEDIA", "802.3");
irlan_insert_string_param(skb, "ACCESS_TYPE", "DIRECT");
/* irlan_insert_string_param(skb, "MODE", "UNRELIABLE"); */
/* self->use_udata = TRUE; */
irlan_ctrl_data_request(self, skb);
}
void irlan_close_data_channel(struct irlan_cb *self)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/* Check if the TSAP is still there */
if (self->client.tsap_ctrl == NULL)
return;
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN"),
GFP_ATOMIC);
if (!skb)
return;
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
/* Build frame */
frame[0] = CMD_CLOSE_DATA_CHAN;
frame[1] = 0x01; /* One parameter */
irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
irlan_ctrl_data_request(self, skb);
}
/*
* Function irlan_open_unicast_addr (self)
*
* Make IrLAN provider accept ethernet frames addressed to the unicast
* address.
*
*/
static void irlan_open_unicast_addr(struct irlan_cb *self)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "DIRECTED") +
IRLAN_STRING_PARAMETER_LEN("FILTER_MODE", "FILTER"),
GFP_ATOMIC);
if (!skb)
return;
/* Reserve space for TTP, LMP, and LAP header */
skb_reserve(skb, self->max_header_size);
skb_put(skb, 2);
frame = skb->data;
frame[0] = CMD_FILTER_OPERATION;
frame[1] = 0x03; /* Three parameters */
irlan_insert_byte_param(skb, "DATA_CHAN" , self->dtsap_sel_data);
irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
irlan_insert_string_param(skb, "FILTER_MODE", "FILTER");
irlan_ctrl_data_request(self, skb);
}
/*
* Function irlan_set_broadcast_filter (self, status)
*
* Make IrLAN provider accept ethernet frames addressed to the broadcast
* address. Be careful with the use of this one, since there may be a lot
* of broadcast traffic out there. We can still function without this
* one but then _we_ have to initiate all communication with other
* hosts, since ARP request for this host will not be answered.
*/
void irlan_set_broadcast_filter(struct irlan_cb *self, int status)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "BROADCAST") +
/* We may waste one byte here...*/
IRLAN_STRING_PARAMETER_LEN("FILTER_MODE", "FILTER"),
GFP_ATOMIC);
if (!skb)
return;
/* Reserve space for TTP, LMP, and LAP header */
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
frame[0] = CMD_FILTER_OPERATION;
frame[1] = 0x03; /* Three parameters */
irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
irlan_insert_string_param(skb, "FILTER_TYPE", "BROADCAST");
if (status)
irlan_insert_string_param(skb, "FILTER_MODE", "FILTER");
else
irlan_insert_string_param(skb, "FILTER_MODE", "NONE");
irlan_ctrl_data_request(self, skb);
}
/*
* Function irlan_set_multicast_filter (self, status)
*
* Make IrLAN provider accept ethernet frames addressed to the multicast
* address.
*
*/
void irlan_set_multicast_filter(struct irlan_cb *self, int status)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "MULTICAST") +
/* We may waste one byte here...*/
IRLAN_STRING_PARAMETER_LEN("FILTER_MODE", "NONE"),
GFP_ATOMIC);
if (!skb)
return;
/* Reserve space for TTP, LMP, and LAP header */
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
frame[0] = CMD_FILTER_OPERATION;
frame[1] = 0x03; /* Three parameters */
irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
irlan_insert_string_param(skb, "FILTER_TYPE", "MULTICAST");
if (status)
irlan_insert_string_param(skb, "FILTER_MODE", "ALL");
else
irlan_insert_string_param(skb, "FILTER_MODE", "NONE");
irlan_ctrl_data_request(self, skb);
}
/*
* Function irlan_get_unicast_addr (self)
*
* Retrieves the unicast address from the IrLAN provider. This address
* will be inserted into the devices structure, so the ethernet layer
* can construct its packets.
*
*/
static void irlan_get_unicast_addr(struct irlan_cb *self)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "DIRECTED") +
IRLAN_STRING_PARAMETER_LEN("FILTER_OPERATION",
"DYNAMIC"),
GFP_ATOMIC);
if (!skb)
return;
/* Reserve space for TTP, LMP, and LAP header */
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
frame[0] = CMD_FILTER_OPERATION;
frame[1] = 0x03; /* Three parameters */
irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
irlan_insert_string_param(skb, "FILTER_OPERATION", "DYNAMIC");
irlan_ctrl_data_request(self, skb);
}
/*
* Function irlan_get_media_char (self)
*
*
*
*/
void irlan_get_media_char(struct irlan_cb *self)
{
struct sk_buff *skb;
__u8 *frame;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
IRLAN_STRING_PARAMETER_LEN("MEDIA", "802.3"),
GFP_ATOMIC);
if (!skb)
return;
/* Reserve space for TTP, LMP, and LAP header */
skb_reserve(skb, self->client.max_header_size);
skb_put(skb, 2);
frame = skb->data;
/* Build frame */
frame[0] = CMD_GET_MEDIA_CHAR;
frame[1] = 0x01; /* One parameter */
irlan_insert_string_param(skb, "MEDIA", "802.3");
irlan_ctrl_data_request(self, skb);
}
/*
* Function insert_byte_param (skb, param, value)
*
* Insert byte parameter into frame
*
*/
int irlan_insert_byte_param(struct sk_buff *skb, char *param, __u8 value)
{
return __irlan_insert_param(skb, param, IRLAN_BYTE, value, 0, NULL, 0);
}
int irlan_insert_short_param(struct sk_buff *skb, char *param, __u16 value)
{
return __irlan_insert_param(skb, param, IRLAN_SHORT, 0, value, NULL, 0);
}
/*
* Function insert_string (skb, param, value)
*
* Insert string parameter into frame
*
*/
int irlan_insert_string_param(struct sk_buff *skb, char *param, char *string)
{
int string_len = strlen(string);
return __irlan_insert_param(skb, param, IRLAN_ARRAY, 0, 0, string,
string_len);
}
/*
* Function insert_array_param(skb, param, value, len_value)
*
* Insert array parameter into frame
*
*/
int irlan_insert_array_param(struct sk_buff *skb, char *name, __u8 *array,
__u16 array_len)
{
return __irlan_insert_param(skb, name, IRLAN_ARRAY, 0, 0, array,
array_len);
}
/*
* Function insert_param (skb, param, value, byte)
*
* Insert parameter at end of buffer, structure of a parameter is:
*
* -----------------------------------------------------------------------
* | Name Length[1] | Param Name[1..255] | Val Length[2] | Value[0..1016]|
* -----------------------------------------------------------------------
*/
static int __irlan_insert_param(struct sk_buff *skb, char *param, int type,
__u8 value_byte, __u16 value_short,
__u8 *value_array, __u16 value_len)
{
__u8 *frame;
__u8 param_len;
__le16 tmp_le; /* Temporary value in little endian format */
int n=0;
if (skb == NULL) {
pr_debug("%s(), Got NULL skb\n", __func__);
return 0;
}
param_len = strlen(param);
switch (type) {
case IRLAN_BYTE:
value_len = 1;
break;
case IRLAN_SHORT:
value_len = 2;
break;
case IRLAN_ARRAY:
IRDA_ASSERT(value_array != NULL, return 0;);
IRDA_ASSERT(value_len > 0, return 0;);
break;
default:
pr_debug("%s(), Unknown parameter type!\n", __func__);
return 0;
}
/* Insert at end of sk-buffer */
frame = skb_tail_pointer(skb);
/* Make space for data */
if (skb_tailroom(skb) < (param_len+value_len+3)) {
pr_debug("%s(), No more space at end of skb\n", __func__);
return 0;
}
skb_put(skb, param_len+value_len+3);
/* Insert parameter length */
frame[n++] = param_len;
/* Insert parameter */
memcpy(frame+n, param, param_len); n += param_len;
/* Insert value length (2 byte little endian format, LSB first) */
tmp_le = cpu_to_le16(value_len);
memcpy(frame+n, &tmp_le, 2); n += 2; /* To avoid alignment problems */
/* Insert value */
switch (type) {
case IRLAN_BYTE:
frame[n++] = value_byte;
break;
case IRLAN_SHORT:
tmp_le = cpu_to_le16(value_short);
memcpy(frame+n, &tmp_le, 2); n += 2;
break;
case IRLAN_ARRAY:
memcpy(frame+n, value_array, value_len); n+=value_len;
break;
default:
break;
}
IRDA_ASSERT(n == (param_len+value_len+3), return 0;);
return param_len+value_len+3;
}
/*
* Function irlan_extract_param (buf, name, value, len)
*
* Extracts a single parameter name/value pair from buffer and updates
* the buffer pointer to point to the next name/value pair.
*/
int irlan_extract_param(__u8 *buf, char *name, char *value, __u16 *len)
{
__u8 name_len;
__u16 val_len;
int n=0;
/* get length of parameter name (1 byte) */
name_len = buf[n++];
if (name_len > 254) {
pr_debug("%s(), name_len > 254\n", __func__);
return -RSP_INVALID_COMMAND_FORMAT;
}
/* get parameter name */
memcpy(name, buf+n, name_len);
name[name_len] = '\0';
n+=name_len;
/*
* Get length of parameter value (2 bytes in little endian
* format)
*/
memcpy(&val_len, buf+n, 2); /* To avoid alignment problems */
le16_to_cpus(&val_len); n+=2;
if (val_len >= 1016) {
pr_debug("%s(), parameter length to long\n", __func__);
return -RSP_INVALID_COMMAND_FORMAT;
}
*len = val_len;
/* get parameter value */
memcpy(value, buf+n, val_len);
value[val_len] = '\0';
n+=val_len;
pr_debug("Parameter: %s ", name);
pr_debug("Value: %s\n", value);
return n;
}
#ifdef CONFIG_PROC_FS
/*
* Start of reading /proc entries.
* Return entry at pos,
* or start_token to indicate print header line
* or NULL if end of file
*/
static void *irlan_seq_start(struct seq_file *seq, loff_t *pos)
{
rcu_read_lock();
return seq_list_start_head(&irlans, *pos);
}
/* Return entry after v, and increment pos */
static void *irlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_list_next(v, &irlans, pos);
}
/* End of reading /proc file */
static void irlan_seq_stop(struct seq_file *seq, void *v)
{
rcu_read_unlock();
}
/*
* Show one entry in /proc file.
*/
static int irlan_seq_show(struct seq_file *seq, void *v)
{
if (v == &irlans)
seq_puts(seq, "IrLAN instances:\n");
else {
struct irlan_cb *self = list_entry(v, struct irlan_cb, dev_list);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
seq_printf(seq,"ifname: %s,\n",
self->dev->name);
seq_printf(seq,"client state: %s, ",
irlan_state[ self->client.state]);
seq_printf(seq,"provider state: %s,\n",
irlan_state[ self->provider.state]);
seq_printf(seq,"saddr: %#08x, ",
self->saddr);
seq_printf(seq,"daddr: %#08x\n",
self->daddr);
seq_printf(seq,"version: %d.%d,\n",
self->version[1], self->version[0]);
seq_printf(seq,"access type: %s\n",
irlan_access[self->client.access_type]);
seq_printf(seq,"media: %s\n",
irlan_media[self->media]);
seq_printf(seq,"local filter:\n");
seq_printf(seq,"remote filter: ");
irlan_print_filter(seq, self->client.filter_type);
seq_printf(seq,"tx busy: %s\n",
netif_queue_stopped(self->dev) ? "TRUE" : "FALSE");
seq_putc(seq,'\n');
}
return 0;
}
static const struct seq_operations irlan_seq_ops = {
.start = irlan_seq_start,
.next = irlan_seq_next,
.stop = irlan_seq_stop,
.show = irlan_seq_show,
};
static int irlan_seq_open(struct inode *inode, struct file *file)
{
return seq_open(file, &irlan_seq_ops);
}
#endif
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("The Linux IrDA LAN protocol");
MODULE_LICENSE("GPL");
module_param(eth, bool, 0);
MODULE_PARM_DESC(eth, "Name devices ethX (0) or irlanX (1)");
module_param(access, int, 0);
MODULE_PARM_DESC(access, "Access type DIRECT=1, PEER=2, HOSTED=3");
module_init(irlan_init);
module_exit(irlan_cleanup);