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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/atm/addr.c | |
download | linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'net/atm/addr.c')
-rw-r--r-- | net/atm/addr.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/net/atm/addr.c b/net/atm/addr.c new file mode 100644 index 00000000000..1c8867f7f54 --- /dev/null +++ b/net/atm/addr.c @@ -0,0 +1,134 @@ +/* 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 <linux/sched.h> +#include <asm/uaccess.h> + +#include "signaling.h" +#include "addr.h" + +static int check_addr(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(struct sockaddr_atmsvc *a, 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(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) +{ + unsigned long flags; + struct atm_dev_addr *this, *p; + + spin_lock_irqsave(&dev->lock, flags); + list_for_each_entry_safe(this, p, &dev->local, entry) + kfree(this); + spin_unlock_irqrestore(&dev->lock, flags); + notify_sigd(dev); +} + +int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr) +{ + unsigned long flags; + struct atm_dev_addr *this; + int error; + + error = check_addr(addr); + if (error) + return error; + spin_lock_irqsave(&dev->lock, flags); + list_for_each_entry(this, &dev->local, 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, &dev->local); + spin_unlock_irqrestore(&dev->lock, flags); + notify_sigd(dev); + return 0; +} + +int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr) +{ + unsigned long flags; + struct atm_dev_addr *this; + int error; + + error = check_addr(addr); + if (error) + return error; + spin_lock_irqsave(&dev->lock, flags); + list_for_each_entry(this, &dev->local, entry) { + if (identical(&this->addr, addr)) { + list_del(&this->entry); + spin_unlock_irqrestore(&dev->lock, flags); + kfree(this); + 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) +{ + unsigned long flags; + struct atm_dev_addr *this; + int total = 0, error; + struct sockaddr_atmsvc *tmp_buf, *tmp_bufp; + + spin_lock_irqsave(&dev->lock, flags); + list_for_each_entry(this, &dev->local, 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, &dev->local, 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; +} |