[linux-2.6] / net / atm / addr.c

/* net/atm/addr.c - Local ATM address registry */

/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */

#include <linux/atm.h>
#include <linux/atmdev.h>
#include <asm/uaccess.h>

#include "signaling.h"
#include "addr.h"

static int check_addr(const struct sockaddr_atmsvc *addr)
{
	int i;

	if (addr->sas_family != AF_ATMSVC)
		return -EAFNOSUPPORT;
	if (!*addr->sas_addr.pub)
		return *addr->sas_addr.prv ? 0 : -EINVAL;
	for (i = 1; i < ATM_E164_LEN + 1; i++)	/* make sure it's \0-terminated */
		if (!addr->sas_addr.pub[i])
			return 0;
	return -EINVAL;
}

static int identical(const struct sockaddr_atmsvc *a, const struct sockaddr_atmsvc *b)
{
	if (*a->sas_addr.prv)
		if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
			return 0;
	if (!*a->sas_addr.pub)
		return !*b->sas_addr.pub;
	if (!*b->sas_addr.pub)
		return 0;
	return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
}

static void notify_sigd(const struct atm_dev *dev)
{
	struct sockaddr_atmpvc pvc;

	pvc.sap_addr.itf = dev->number;
	sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
}

void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype)
{
	unsigned long flags;
	struct atm_dev_addr *this, *p;
	struct list_head *head;

	spin_lock_irqsave(&dev->lock, flags);
	if (atype == ATM_ADDR_LECS)
		head = &dev->lecs;
	else
		head = &dev->local;
	list_for_each_entry_safe(this, p, head, entry) {
		list_del(&this->entry);
		kfree(this);
	}
	spin_unlock_irqrestore(&dev->lock, flags);
	if (head == &dev->local)
		notify_sigd(dev);
}

int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr,
		 enum atm_addr_type_t atype)
{
	unsigned long flags;
	struct atm_dev_addr *this;
	struct list_head *head;
	int error;

	error = check_addr(addr);
	if (error)
		return error;
	spin_lock_irqsave(&dev->lock, flags);
	if (atype == ATM_ADDR_LECS)
		head = &dev->lecs;
	else
		head = &dev->local;
	list_for_each_entry(this, head, entry) {
		if (identical(&this->addr, addr)) {
			spin_unlock_irqrestore(&dev->lock, flags);
			return -EEXIST;
		}
	}
	this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
	if (!this) {
		spin_unlock_irqrestore(&dev->lock, flags);
		return -ENOMEM;
	}
	this->addr = *addr;
	list_add(&this->entry, head);
	spin_unlock_irqrestore(&dev->lock, flags);
	if (head == &dev->local)
		notify_sigd(dev);
	return 0;
}

int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr,
		 enum atm_addr_type_t atype)
{
	unsigned long flags;
	struct atm_dev_addr *this;
	struct list_head *head;
	int error;

	error = check_addr(addr);
	if (error)
		return error;
	spin_lock_irqsave(&dev->lock, flags);
	if (atype == ATM_ADDR_LECS)
		head = &dev->lecs;
	else
		head = &dev->local;
	list_for_each_entry(this, head, entry) {
		if (identical(&this->addr, addr)) {
			list_del(&this->entry);
			spin_unlock_irqrestore(&dev->lock, flags);
			kfree(this);
			if (head == &dev->local)
				notify_sigd(dev);
			return 0;
		}
	}
	spin_unlock_irqrestore(&dev->lock, flags);
	return -ENOENT;
}

int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
		 size_t size, enum atm_addr_type_t atype)
{
	unsigned long flags;
	struct atm_dev_addr *this;
	struct list_head *head;
	int total = 0, error;
	struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;

	spin_lock_irqsave(&dev->lock, flags);
	if (atype == ATM_ADDR_LECS)
		head = &dev->lecs;
	else
		head = &dev->local;
	list_for_each_entry(this, head, entry)
	    total += sizeof(struct sockaddr_atmsvc);
	tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
	if (!tmp_buf) {
		spin_unlock_irqrestore(&dev->lock, flags);
		return -ENOMEM;
	}
	list_for_each_entry(this, head, entry)
	    memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
	spin_unlock_irqrestore(&dev->lock, flags);
	error = total > size ? -E2BIG : total;
	if (copy_to_user(buf, tmp_buf, total < size ? total : size))
		error = -EFAULT;
	kfree(tmp_buf);
	return error;
}
Commit	Line	Data
1da177e4 LT	1	/* net/atm/addr.c - Local ATM address registry */
	2
	3	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	4
	5	#include <linux/atm.h>
	6	#include <linux/atmdev.h>
1da177e4 LT	7	#include <asm/uaccess.h>
	8
	9	#include "signaling.h"
	10	#include "addr.h"
	11
61c33e01	12	static int check_addr(const struct sockaddr_atmsvc *addr)
1da177e4 LT	13	{
	14	int i;
	15
	16	if (addr->sas_family != AF_ATMSVC)
	17	return -EAFNOSUPPORT;
	18	if (!*addr->sas_addr.pub)
	19	return *addr->sas_addr.prv ? 0 : -EINVAL;
	20	for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */
	21	if (!addr->sas_addr.pub[i])
	22	return 0;
	23	return -EINVAL;
	24	}
	25
61c33e01	26	static int identical(const struct sockaddr_atmsvc a, const struct sockaddr_atmsvc b)
1da177e4 LT	27	{
	28	if (*a->sas_addr.prv)
	29	if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
	30	return 0;
	31	if (!*a->sas_addr.pub)
	32	return !*b->sas_addr.pub;
	33	if (!*b->sas_addr.pub)
	34	return 0;
	35	return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
	36	}
	37
61c33e01	38	static void notify_sigd(const struct atm_dev *dev)
1da177e4 LT	39	{
	40	struct sockaddr_atmpvc pvc;
	41
	42	pvc.sap_addr.itf = dev->number;
	43	sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
	44	}
	45
0f21ba7c	46	void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype)
1da177e4 LT	47	{
	48	unsigned long flags;
	49	struct atm_dev_addr this, p;
0f21ba7c	50	struct list_head *head;
1da177e4 LT	51
1da177e4 LT	52	spin_lock_irqsave(&dev->lock, flags);
0f21ba7c EK	53	if (atype == ATM_ADDR_LECS)
	54	head = &dev->lecs;
	55	else
	56	head = &dev->local;
	57	list_for_each_entry_safe(this, p, head, entry) {
735631a9 MW	58	list_del(&this->entry);
	59	kfree(this);
	60	}
1da177e4	61	spin_unlock_irqrestore(&dev->lock, flags);
0f21ba7c EK	62	if (head == &dev->local)
0f21ba7c EK	63	notify_sigd(dev);
1da177e4 LT	64	}
1da177e4 LT	65
61c33e01	66	int atm_add_addr(struct atm_dev dev, const struct sockaddr_atmsvc addr,
0f21ba7c	67	enum atm_addr_type_t atype)
1da177e4 LT	68	{
	69	unsigned long flags;
	70	struct atm_dev_addr *this;
0f21ba7c	71	struct list_head *head;
1da177e4 LT	72	int error;
	73
	74	error = check_addr(addr);
	75	if (error)
	76	return error;
	77	spin_lock_irqsave(&dev->lock, flags);
0f21ba7c EK	78	if (atype == ATM_ADDR_LECS)
	79	head = &dev->lecs;
	80	else
	81	head = &dev->local;
	82	list_for_each_entry(this, head, entry) {
1da177e4 LT	83	if (identical(&this->addr, addr)) {
	84	spin_unlock_irqrestore(&dev->lock, flags);
	85	return -EEXIST;
	86	}
	87	}
	88	this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
	89	if (!this) {
	90	spin_unlock_irqrestore(&dev->lock, flags);
	91	return -ENOMEM;
	92	}
	93	this->addr = *addr;
0f21ba7c	94	list_add(&this->entry, head);
1da177e4	95	spin_unlock_irqrestore(&dev->lock, flags);
0f21ba7c EK	96	if (head == &dev->local)
0f21ba7c EK	97	notify_sigd(dev);
1da177e4 LT	98	return 0;
	99	}
	100
61c33e01	101	int atm_del_addr(struct atm_dev dev, const struct sockaddr_atmsvc addr,
0f21ba7c	102	enum atm_addr_type_t atype)
1da177e4 LT	103	{
	104	unsigned long flags;
	105	struct atm_dev_addr *this;
0f21ba7c	106	struct list_head *head;
1da177e4 LT	107	int error;
	108
	109	error = check_addr(addr);
	110	if (error)
	111	return error;
	112	spin_lock_irqsave(&dev->lock, flags);
0f21ba7c EK	113	if (atype == ATM_ADDR_LECS)
	114	head = &dev->lecs;
	115	else
	116	head = &dev->local;
	117	list_for_each_entry(this, head, entry) {
1da177e4 LT	118	if (identical(&this->addr, addr)) {
	119	list_del(&this->entry);
	120	spin_unlock_irqrestore(&dev->lock, flags);
	121	kfree(this);
0f21ba7c EK	122	if (head == &dev->local)
0f21ba7c EK	123	notify_sigd(dev);
1da177e4 LT	124	return 0;
	125	}
	126	}
	127	spin_unlock_irqrestore(&dev->lock, flags);
	128	return -ENOENT;
	129	}
	130
	131	int atm_get_addr(struct atm_dev dev, struct sockaddr_atmsvc __user buf,
0f21ba7c	132	size_t size, enum atm_addr_type_t atype)
1da177e4 LT	133	{
	134	unsigned long flags;
	135	struct atm_dev_addr *this;
0f21ba7c	136	struct list_head *head;
1da177e4 LT	137	int total = 0, error;
	138	struct sockaddr_atmsvc tmp_buf, tmp_bufp;
	139
	140	spin_lock_irqsave(&dev->lock, flags);
0f21ba7c EK	141	if (atype == ATM_ADDR_LECS)
	142	head = &dev->lecs;
	143	else
	144	head = &dev->local;
	145	list_for_each_entry(this, head, entry)
1da177e4 LT	146	total += sizeof(struct sockaddr_atmsvc);
	147	tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
	148	if (!tmp_buf) {
	149	spin_unlock_irqrestore(&dev->lock, flags);
	150	return -ENOMEM;
	151	}
0f21ba7c	152	list_for_each_entry(this, head, entry)
1da177e4 LT	153	memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
	154	spin_unlock_irqrestore(&dev->lock, flags);
	155	error = total > size ? -E2BIG : total;
	156	if (copy_to_user(buf, tmp_buf, total < size ? total : size))
	157	error = -EFAULT;
	158	kfree(tmp_buf);
	159	return error;
	160	}