1 files changed, 134 insertions, 0 deletions

diff --git a/net/atm/addr.c b/net/atm/addr.c
new file mode 100644
index 000000000000..1c8867f7f54a
--- /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;
+}