1 /* net/atm/addr.c - Local ATM address registry */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
6 #include <linux/atmdev.h>
7 #include <linux/sched.h>
8 #include <asm/uaccess.h>
10 #include "signaling.h"
13 static int check_addr(struct sockaddr_atmsvc *addr)
17 if (addr->sas_family != AF_ATMSVC)
19 if (!*addr->sas_addr.pub)
20 return *addr->sas_addr.prv ? 0 : -EINVAL;
21 for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */
22 if (!addr->sas_addr.pub[i])
27 static int identical(struct sockaddr_atmsvc *a, struct sockaddr_atmsvc *b)
30 if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
32 if (!*a->sas_addr.pub)
33 return !*b->sas_addr.pub;
34 if (!*b->sas_addr.pub)
36 return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
39 static void notify_sigd(struct atm_dev *dev)
41 struct sockaddr_atmpvc pvc;
43 pvc.sap_addr.itf = dev->number;
44 sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
47 void atm_reset_addr(struct atm_dev *dev)
50 struct atm_dev_addr *this, *p;
52 spin_lock_irqsave(&dev->lock, flags);
53 list_for_each_entry_safe(this, p, &dev->local, entry) {
54 list_del(&this->entry);
57 spin_unlock_irqrestore(&dev->lock, flags);
61 int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
64 struct atm_dev_addr *this;
67 error = check_addr(addr);
70 spin_lock_irqsave(&dev->lock, flags);
71 list_for_each_entry(this, &dev->local, entry) {
72 if (identical(&this->addr, addr)) {
73 spin_unlock_irqrestore(&dev->lock, flags);
77 this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
79 spin_unlock_irqrestore(&dev->lock, flags);
83 list_add(&this->entry, &dev->local);
84 spin_unlock_irqrestore(&dev->lock, flags);
89 int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
92 struct atm_dev_addr *this;
95 error = check_addr(addr);
98 spin_lock_irqsave(&dev->lock, flags);
99 list_for_each_entry(this, &dev->local, entry) {
100 if (identical(&this->addr, addr)) {
101 list_del(&this->entry);
102 spin_unlock_irqrestore(&dev->lock, flags);
108 spin_unlock_irqrestore(&dev->lock, flags);
112 int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
116 struct atm_dev_addr *this;
117 int total = 0, error;
118 struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
120 spin_lock_irqsave(&dev->lock, flags);
121 list_for_each_entry(this, &dev->local, entry)
122 total += sizeof(struct sockaddr_atmsvc);
123 tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
125 spin_unlock_irqrestore(&dev->lock, flags);
128 list_for_each_entry(this, &dev->local, entry)
129 memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
130 spin_unlock_irqrestore(&dev->lock, flags);
131 error = total > size ? -E2BIG : total;
132 if (copy_to_user(buf, tmp_buf, total < size ? total : size))