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net/atm/addr.c
3.85 KB
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/* 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> |
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#include <linux/slab.h> |
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#include <linux/uaccess.h> |
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#include "signaling.h" #include "addr.h" |
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static int check_addr(const struct sockaddr_atmsvc *addr) |
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{ 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; } |
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static int identical(const struct sockaddr_atmsvc *a, const struct sockaddr_atmsvc *b) |
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{ 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); } |
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static void notify_sigd(const struct atm_dev *dev) |
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{ struct sockaddr_atmpvc pvc; pvc.sap_addr.itf = dev->number; sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL); } |
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void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype) |
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{ unsigned long flags; struct atm_dev_addr *this, *p; |
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struct list_head *head; |
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spin_lock_irqsave(&dev->lock, flags); |
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if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry_safe(this, p, head, entry) { |
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list_del(&this->entry); kfree(this); } |
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spin_unlock_irqrestore(&dev->lock, flags); |
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if (head == &dev->local) notify_sigd(dev); |
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} |
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int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, |
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enum atm_addr_type_t atype) |
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{ unsigned long flags; struct atm_dev_addr *this; |
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struct list_head *head; |
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int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); |
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if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) { |
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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; |
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list_add(&this->entry, head); |
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spin_unlock_irqrestore(&dev->lock, flags); |
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if (head == &dev->local) notify_sigd(dev); |
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return 0; } |
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int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, |
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enum atm_addr_type_t atype) |
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{ unsigned long flags; struct atm_dev_addr *this; |
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struct list_head *head; |
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int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); |
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if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) { |
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if (identical(&this->addr, addr)) { list_del(&this->entry); spin_unlock_irqrestore(&dev->lock, flags); kfree(this); |
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if (head == &dev->local) notify_sigd(dev); |
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return 0; } } spin_unlock_irqrestore(&dev->lock, flags); return -ENOENT; } int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf, |
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size_t size, enum atm_addr_type_t atype) |
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{ unsigned long flags; struct atm_dev_addr *this; |
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struct list_head *head; |
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int total = 0, error; struct sockaddr_atmsvc *tmp_buf, *tmp_bufp; spin_lock_irqsave(&dev->lock, flags); |
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if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) |
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total += sizeof(struct sockaddr_atmsvc); tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC); if (!tmp_buf) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOMEM; } |
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list_for_each_entry(this, head, entry) |
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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; } |