linux-sg2042/net/irda/irlan/irlan_client.c

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/*********************************************************************
*
* Filename: irlan_client.c
* Version: 0.9
* Description: IrDA LAN Access Protocol (IrLAN) Client
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sun Aug 31 20:14:37 1997
* Modified at: Tue Dec 14 15:47:02 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
* Sources: skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
* slip.c by Laurence Culhane, <loz@holmes.demon.co.uk>
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
*
* Copyright (c) 1998-1999 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/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 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitops.h>
#include <net/arp.h>
#include <asm/byteorder.h>
#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irlmp.h>
#include <net/irda/irias_object.h>
#include <net/irda/iriap.h>
#include <net/irda/timer.h>
#include <net/irda/irlan_common.h>
#include <net/irda/irlan_event.h>
#include <net/irda/irlan_eth.h>
#include <net/irda/irlan_provider.h>
#include <net/irda/irlan_client.h>
#undef CONFIG_IRLAN_GRATUITOUS_ARP
static void irlan_client_ctrl_disconnect_indication(void *instance, void *sap,
LM_REASON reason,
struct sk_buff *);
static int irlan_client_ctrl_data_indication(void *instance, void *sap,
struct sk_buff *skb);
static void irlan_client_ctrl_connect_confirm(void *instance, void *sap,
struct qos_info *qos,
__u32 max_sdu_size,
__u8 max_header_size,
struct sk_buff *);
static void irlan_check_response_param(struct irlan_cb *self, char *param,
char *value, int val_len);
static void irlan_client_open_ctrl_tsap(struct irlan_cb *self);
static void irlan_client_kick_timer_expired(void *data)
{
struct irlan_cb *self = (struct irlan_cb *) data;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/*
* If we are in peer mode, the client may not have got the discovery
* indication it needs to make progress. If the client is still in
* IDLE state, we must kick it to, but only if the provider is not IDLE
*/
if ((self->provider.access_type == ACCESS_PEER) &&
(self->client.state == IRLAN_IDLE) &&
(self->provider.state != IRLAN_IDLE)) {
irlan_client_wakeup(self, self->saddr, self->daddr);
}
}
static void irlan_client_start_kick_timer(struct irlan_cb *self, int timeout)
{
irda_start_timer(&self->client.kick_timer, timeout, (void *) self,
irlan_client_kick_timer_expired);
}
/*
* Function irlan_client_wakeup (self, saddr, daddr)
*
* Wake up client
*
*/
void irlan_client_wakeup(struct irlan_cb *self, __u32 saddr, __u32 daddr)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/*
* Check if we are already awake, or if we are a provider in direct
* mode (in that case we must leave the client idle
*/
if ((self->client.state != IRLAN_IDLE) ||
(self->provider.access_type == ACCESS_DIRECT))
{
pr_debug("%s(), already awake!\n", __func__);
return;
}
/* Addresses may have changed! */
self->saddr = saddr;
self->daddr = daddr;
if (self->disconnect_reason == LM_USER_REQUEST) {
pr_debug("%s(), still stopped by user\n", __func__);
return;
}
/* Open TSAPs */
irlan_client_open_ctrl_tsap(self);
irlan_open_data_tsap(self);
irlan_do_client_event(self, IRLAN_DISCOVERY_INDICATION, NULL);
/* Start kick timer */
irlan_client_start_kick_timer(self, 2*HZ);
}
/*
* Function irlan_discovery_indication (daddr)
*
* Remote device with IrLAN server support discovered
*
*/
void irlan_client_discovery_indication(discinfo_t *discovery,
DISCOVERY_MODE mode,
void *priv)
{
struct irlan_cb *self;
__u32 saddr, daddr;
IRDA_ASSERT(discovery != NULL, return;);
/*
* I didn't check it, but I bet that IrLAN suffer from the same
* deficiency as IrComm and doesn't handle two instances
* simultaneously connecting to each other.
* Same workaround, drop passive discoveries.
* Jean II */
if(mode == DISCOVERY_PASSIVE)
return;
saddr = discovery->saddr;
daddr = discovery->daddr;
/* Find instance */
rcu_read_lock();
self = irlan_get_any();
if (self) {
IRDA_ASSERT(self->magic == IRLAN_MAGIC, goto out;);
pr_debug("%s(), Found instance (%08x)!\n", __func__ ,
daddr);
irlan_client_wakeup(self, saddr, daddr);
}
IRDA_ASSERT_LABEL(out:)
rcu_read_unlock();
}
/*
* Function irlan_client_data_indication (handle, skb)
*
* This function gets the data that is received on the control channel
*
*/
static int irlan_client_ctrl_data_indication(void *instance, void *sap,
struct sk_buff *skb)
{
struct irlan_cb *self;
self = instance;
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
IRDA_ASSERT(skb != NULL, return -1;);
irlan_do_client_event(self, IRLAN_DATA_INDICATION, skb);
/* Ready for a new command */
pr_debug("%s(), clearing tx_busy\n", __func__);
self->client.tx_busy = FALSE;
/* Check if we have some queued commands waiting to be sent */
irlan_run_ctrl_tx_queue(self);
return 0;
}
static void irlan_client_ctrl_disconnect_indication(void *instance, void *sap,
LM_REASON reason,
struct sk_buff *userdata)
{
struct irlan_cb *self;
struct tsap_cb *tsap;
struct sk_buff *skb;
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->client.tsap_ctrl, return;);
/* Remove frames queued on the control channel */
while ((skb = skb_dequeue(&self->client.txq)) != NULL) {
dev_kfree_skb(skb);
}
self->client.tx_busy = FALSE;
irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
}
/*
* Function irlan_client_open_tsaps (self)
*
* Initialize callbacks and open IrTTP TSAPs
*
*/
static void irlan_client_open_ctrl_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->client.tsap_ctrl)
return;
irda_notify_init(&notify);
/* Set up callbacks */
notify.data_indication = irlan_client_ctrl_data_indication;
notify.connect_confirm = irlan_client_ctrl_connect_confirm;
notify.disconnect_indication = irlan_client_ctrl_disconnect_indication;
notify.instance = self;
strlcpy(notify.name, "IrLAN ctrl (c)", 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->client.tsap_ctrl = tsap;
}
/*
* Function irlan_client_connect_confirm (handle, skb)
*
* Connection to peer IrLAN laye confirmed
*
*/
static void irlan_client_ctrl_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->client.max_sdu_size = max_sdu_size;
self->client.max_header_size = max_header_size;
/* TODO: we could set the MTU depending on the max_sdu_size */
irlan_do_client_event(self, IRLAN_CONNECT_COMPLETE, NULL);
}
/*
* Function print_ret_code (code)
*
* Print return code of request to peer IrLAN layer.
*
*/
static void print_ret_code(__u8 code)
{
switch(code) {
case 0:
printk(KERN_INFO "Success\n");
break;
case 1:
net_warn_ratelimited("IrLAN: Insufficient resources\n");
break;
case 2:
net_warn_ratelimited("IrLAN: Invalid command format\n");
break;
case 3:
net_warn_ratelimited("IrLAN: Command not supported\n");
break;
case 4:
net_warn_ratelimited("IrLAN: Parameter not supported\n");
break;
case 5:
net_warn_ratelimited("IrLAN: Value not supported\n");
break;
case 6:
net_warn_ratelimited("IrLAN: Not open\n");
break;
case 7:
net_warn_ratelimited("IrLAN: Authentication required\n");
break;
case 8:
net_warn_ratelimited("IrLAN: Invalid password\n");
break;
case 9:
net_warn_ratelimited("IrLAN: Protocol error\n");
break;
case 255:
net_warn_ratelimited("IrLAN: Asynchronous status\n");
break;
}
}
/*
* Function irlan_client_parse_response (self, skb)
*
* Extract all parameters from received buffer, then feed them to
* check_params for parsing
*/
void irlan_client_parse_response(struct irlan_cb *self, struct sk_buff *skb)
{
__u8 *frame;
__u8 *ptr;
int count;
int ret;
__u16 val_len;
int i;
char *name;
char *value;
IRDA_ASSERT(skb != NULL, return;);
pr_debug("%s() skb->len=%d\n", __func__ , (int)skb->len);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
if (!skb) {
net_err_ratelimited("%s(), Got NULL skb!\n", __func__);
return;
}
frame = skb->data;
/*
* Check return code and print it if not success
*/
if (frame[0]) {
print_ret_code(frame[0]);
return;
}
name = kmalloc(255, GFP_ATOMIC);
if (!name)
return;
value = kmalloc(1016, GFP_ATOMIC);
if (!value) {
kfree(name);
return;
}
/* How many parameters? */
count = frame[1];
pr_debug("%s(), got %d parameters\n", __func__ , count);
ptr = frame+2;
/* For all parameters */
for (i=0; i<count;i++) {
ret = irlan_extract_param(ptr, name, value, &val_len);
if (ret < 0) {
pr_debug("%s(), IrLAN, Error!\n", __func__);
break;
}
ptr += ret;
irlan_check_response_param(self, name, value, val_len);
}
/* Cleanup */
kfree(name);
kfree(value);
}
/*
* Function irlan_check_response_param (self, param, value, val_len)
*
* Check which parameter is received and update local variables
*
*/
static void irlan_check_response_param(struct irlan_cb *self, char *param,
char *value, int val_len)
{
__u16 tmp_cpu; /* Temporary value in host order */
__u8 *bytes;
int i;
pr_debug("%s(), parm=%s\n", __func__ , param);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/* Media type */
if (strcmp(param, "MEDIA") == 0) {
if (strcmp(value, "802.3") == 0)
self->media = MEDIA_802_3;
else
self->media = MEDIA_802_5;
return;
}
if (strcmp(param, "FILTER_TYPE") == 0) {
if (strcmp(value, "DIRECTED") == 0)
self->client.filter_type |= IRLAN_DIRECTED;
else if (strcmp(value, "FUNCTIONAL") == 0)
self->client.filter_type |= IRLAN_FUNCTIONAL;
else if (strcmp(value, "GROUP") == 0)
self->client.filter_type |= IRLAN_GROUP;
else if (strcmp(value, "MAC_FRAME") == 0)
self->client.filter_type |= IRLAN_MAC_FRAME;
else if (strcmp(value, "MULTICAST") == 0)
self->client.filter_type |= IRLAN_MULTICAST;
else if (strcmp(value, "BROADCAST") == 0)
self->client.filter_type |= IRLAN_BROADCAST;
else if (strcmp(value, "IPX_SOCKET") == 0)
self->client.filter_type |= IRLAN_IPX_SOCKET;
}
if (strcmp(param, "ACCESS_TYPE") == 0) {
if (strcmp(value, "DIRECT") == 0)
self->client.access_type = ACCESS_DIRECT;
else if (strcmp(value, "PEER") == 0)
self->client.access_type = ACCESS_PEER;
else if (strcmp(value, "HOSTED") == 0)
self->client.access_type = ACCESS_HOSTED;
else {
pr_debug("%s(), unknown access type!\n", __func__);
}
}
/* IRLAN version */
if (strcmp(param, "IRLAN_VER") == 0) {
pr_debug("IrLAN version %d.%d\n", (__u8)value[0],
(__u8)value[1]);
self->version[0] = value[0];
self->version[1] = value[1];
return;
}
/* Which remote TSAP to use for data channel */
if (strcmp(param, "DATA_CHAN") == 0) {
self->dtsap_sel_data = value[0];
pr_debug("Data TSAP = %02x\n", self->dtsap_sel_data);
return;
}
if (strcmp(param, "CON_ARB") == 0) {
memcpy(&tmp_cpu, value, 2); /* Align value */
le16_to_cpus(&tmp_cpu); /* Convert to host order */
self->client.recv_arb_val = tmp_cpu;
pr_debug("%s(), receive arb val=%d\n", __func__ ,
self->client.recv_arb_val);
}
if (strcmp(param, "MAX_FRAME") == 0) {
memcpy(&tmp_cpu, value, 2); /* Align value */
le16_to_cpus(&tmp_cpu); /* Convert to host order */
self->client.max_frame = tmp_cpu;
pr_debug("%s(), max frame=%d\n", __func__ ,
self->client.max_frame);
}
/* RECONNECT_KEY, in case the link goes down! */
if (strcmp(param, "RECONNECT_KEY") == 0) {
pr_debug("Got reconnect key: ");
/* for (i = 0; i < val_len; i++) */
/* printk("%02x", value[i]); */
memcpy(self->client.reconnect_key, value, val_len);
self->client.key_len = val_len;
pr_debug("\n");
}
/* FILTER_ENTRY, have we got an ethernet address? */
if (strcmp(param, "FILTER_ENTRY") == 0) {
bytes = value;
pr_debug("Ethernet address = %pM\n", bytes);
for (i = 0; i < 6; i++)
self->dev->dev_addr[i] = bytes[i];
}
}
/*
* Function irlan_client_get_value_confirm (obj_id, value)
*
* Got results from remote LM-IAS
*
*/
void irlan_client_get_value_confirm(int result, __u16 obj_id,
struct ias_value *value, void *priv)
{
struct irlan_cb *self;
IRDA_ASSERT(priv != NULL, return;);
self = priv;
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
/* We probably don't need to make any more queries */
iriap_close(self->client.iriap);
self->client.iriap = NULL;
/* Check if request succeeded */
if (result != IAS_SUCCESS) {
pr_debug("%s(), got NULL value!\n", __func__);
irlan_do_client_event(self, IRLAN_IAS_PROVIDER_NOT_AVAIL,
NULL);
return;
}
switch (value->type) {
case IAS_INTEGER:
self->dtsap_sel_ctrl = value->t.integer;
if (value->t.integer != -1) {
irlan_do_client_event(self, IRLAN_IAS_PROVIDER_AVAIL,
NULL);
return;
}
irias_delete_value(value);
break;
default:
pr_debug("%s(), unknown type!\n", __func__);
break;
}
irlan_do_client_event(self, IRLAN_IAS_PROVIDER_NOT_AVAIL, NULL);
}