1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/* net/atm/addr.c - Local ATM address registry */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/sched.h>
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#include <asm/uaccess.h>
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#include "signaling.h"
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#include "addr.h"
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static int check_addr(struct sockaddr_atmsvc *addr)
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{
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int i;
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if (addr->sas_family != AF_ATMSVC)
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return -EAFNOSUPPORT;
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if (!*addr->sas_addr.pub)
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return *addr->sas_addr.prv ? 0 : -EINVAL;
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for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */
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if (!addr->sas_addr.pub[i])
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return 0;
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return -EINVAL;
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}
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static int identical(struct sockaddr_atmsvc *a, struct sockaddr_atmsvc *b)
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{
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if (*a->sas_addr.prv)
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if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
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return 0;
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if (!*a->sas_addr.pub)
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return !*b->sas_addr.pub;
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if (!*b->sas_addr.pub)
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return 0;
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return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
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}
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static void notify_sigd(struct atm_dev *dev)
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{
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struct sockaddr_atmpvc pvc;
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pvc.sap_addr.itf = dev->number;
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sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
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}
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void atm_reset_addr(struct atm_dev *dev)
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{
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unsigned long flags;
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struct atm_dev_addr *this, *p;
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spin_lock_irqsave(&dev->lock, flags);
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list_for_each_entry_safe(this, p, &dev->local, entry)
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kfree(this);
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spin_unlock_irqrestore(&dev->lock, flags);
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notify_sigd(dev);
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}
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int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
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{
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unsigned long flags;
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struct atm_dev_addr *this;
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int error;
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error = check_addr(addr);
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if (error)
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return error;
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spin_lock_irqsave(&dev->lock, flags);
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list_for_each_entry(this, &dev->local, entry) {
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if (identical(&this->addr, addr)) {
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spin_unlock_irqrestore(&dev->lock, flags);
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return -EEXIST;
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}
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}
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this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
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if (!this) {
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spin_unlock_irqrestore(&dev->lock, flags);
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return -ENOMEM;
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}
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this->addr = *addr;
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list_add(&this->entry, &dev->local);
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spin_unlock_irqrestore(&dev->lock, flags);
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notify_sigd(dev);
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return 0;
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}
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int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
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{
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unsigned long flags;
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struct atm_dev_addr *this;
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int error;
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error = check_addr(addr);
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if (error)
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return error;
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spin_lock_irqsave(&dev->lock, flags);
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list_for_each_entry(this, &dev->local, entry) {
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if (identical(&this->addr, addr)) {
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list_del(&this->entry);
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spin_unlock_irqrestore(&dev->lock, flags);
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kfree(this);
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notify_sigd(dev);
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return 0;
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}
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}
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spin_unlock_irqrestore(&dev->lock, flags);
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return -ENOENT;
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}
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int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
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size_t size)
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{
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unsigned long flags;
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struct atm_dev_addr *this;
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int total = 0, error;
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struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
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spin_lock_irqsave(&dev->lock, flags);
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list_for_each_entry(this, &dev->local, entry)
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total += sizeof(struct sockaddr_atmsvc);
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tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
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if (!tmp_buf) {
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spin_unlock_irqrestore(&dev->lock, flags);
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return -ENOMEM;
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}
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list_for_each_entry(this, &dev->local, entry)
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memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
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spin_unlock_irqrestore(&dev->lock, flags);
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error = total > size ? -E2BIG : total;
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if (copy_to_user(buf, tmp_buf, total < size ? total : size))
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error = -EFAULT;
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kfree(tmp_buf);
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return error;
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}
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