- ret = 0;
- t = ((struct xt_entry_target *)target)->u.kernel.target;
- off = XT_ALIGN(t->targetsize) - COMPAT_XT_ALIGN(t->targetsize);
- switch (convert) {
- case COMPAT_TO_USER:
- pt = (struct xt_entry_target *)target;
- tsize = pt->u.user.target_size;
- if (copy_to_user(*dstptr, pt, tsize)) {
- ret = -EFAULT;
- break;
- }
- tsize -= off;
- if (put_user(tsize, (u_int16_t *)*dstptr))
- ret = -EFAULT;
- *size -= off;
- *dstptr += tsize;
- break;
- case COMPAT_FROM_USER:
- pcompat = (struct compat_xt_entry_target *)target;
- pt = (struct xt_entry_target *)*dstptr;
- tsize = pcompat->u.user.target_size;
- memcpy(pt, pcompat, tsize);
- tsize += off;
- pt->u.user.target_size = tsize;
- *size += off;
- *dstptr += tsize;
- break;
- case COMPAT_CALC_SIZE:
- *size += off;
- break;
- default:
- ret = -ENOPROTOOPT;
- break;
+void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr,
+ int *size)
+{
+ struct xt_target *target = t->u.kernel.target;
+ struct compat_xt_entry_target *ct = (struct compat_xt_entry_target *)t;
+ int pad, off = xt_compat_target_offset(target);
+ u_int16_t tsize = ct->u.user.target_size;
+
+ t = *dstptr;
+ memcpy(t, ct, sizeof(*ct));
+ if (target->compat_from_user)
+ target->compat_from_user(t->data, ct->data);
+ else
+ memcpy(t->data, ct->data, tsize - sizeof(*ct));
+ pad = XT_ALIGN(target->targetsize) - target->targetsize;
+ if (pad > 0)
+ memset(t->data + target->targetsize, 0, pad);
+
+ tsize += off;
+ t->u.user.target_size = tsize;
+
+ *size += off;
+ *dstptr += tsize;
+}
+EXPORT_SYMBOL_GPL(xt_compat_target_from_user);
+
+int xt_compat_target_to_user(struct xt_entry_target *t, void __user **dstptr,
+ int *size)
+{
+ struct xt_target *target = t->u.kernel.target;
+ struct compat_xt_entry_target __user *ct = *dstptr;
+ int off = xt_compat_target_offset(target);
+ u_int16_t tsize = t->u.user.target_size - off;
+
+ if (copy_to_user(ct, t, sizeof(*ct)) ||
+ put_user(tsize, &ct->u.user.target_size))
+ return -EFAULT;
+
+ if (target->compat_to_user) {
+ if (target->compat_to_user((void __user *)ct->data, t->data))
+ return -EFAULT;
+ } else {
+ if (copy_to_user(ct->data, t->data, tsize - sizeof(*ct)))
+ return -EFAULT;