/*! Returns a reference to the first InterfaceAddress that is from the same
as the specified \a family.
*/
InterfaceAddress*
Interface::FirstForFamily(int family)
{
RecursiveLocker locker(fLock);
InterfaceAddress* address = _FirstForFamily(family);
if (address != NULL) {
address->AcquireReference();
return address;
}
return NULL;
}
InterfaceAddress*
get_interface_address(const sockaddr* local)
{
if (local->sa_family == AF_UNSPEC)
return NULL;
MutexLocker locker(sHashLock);
InterfaceAddress* address = sAddressTable.Lookup(local);
if (address == NULL)
return NULL;
address->AcquireReference();
return address;
}
bool
Interface::GetNextAddress(InterfaceAddress** _address)
{
RecursiveLocker locker(fLock);
InterfaceAddress* address = *_address;
if (address == NULL) {
// get first address
address = fAddresses.First();
} else {
// get next, if possible
InterfaceAddress* next = fAddresses.GetNext(address);
address->ReleaseReference();
address = next;
}
*_address = address;
if (address == NULL)
return false;
address->AcquireReference();
return true;
}
/*! This is called in order to call the correct methods of the datalink
protocols, ie. it will translate address changes to
net_datalink_protocol::change_address(), and IFF_UP changes to
net_datalink_protocol::interface_up(), and interface_down().
Everything else is passed unchanged to net_datalink_protocol::control().
*/
status_t
Interface::Control(net_domain* domain, int32 option, ifreq& request,
ifreq* userRequest, size_t length)
{
switch (option) {
case SIOCSIFFLAGS:
{
if (length != sizeof(ifreq))
return B_BAD_VALUE;
uint32 requestFlags = request.ifr_flags;
uint32 oldFlags = flags;
status_t status = B_OK;
request.ifr_flags &= ~(IFF_UP | IFF_LINK | IFF_BROADCAST);
if ((requestFlags & IFF_UP) != (flags & IFF_UP)) {
if ((requestFlags & IFF_UP) != 0)
status = _SetUp();
else
SetDown();
}
if (status == B_OK) {
// TODO: maybe allow deleting IFF_BROADCAST on the interface
// level?
flags &= IFF_UP | IFF_LINK | IFF_BROADCAST;
flags |= request.ifr_flags;
}
if (oldFlags != flags) {
TRACE("Interface %p: flags changed from %" B_PRIx32 " to %"
B_PRIx32 "\n", this, oldFlags, flags);
notify_interface_changed(this, oldFlags, flags);
}
return status;
}
case B_SOCKET_SET_ALIAS:
{
if (length != sizeof(ifaliasreq))
return B_BAD_VALUE;
RecursiveLocker locker(fLock);
ifaliasreq aliasRequest;
if (user_memcpy(&aliasRequest, userRequest, sizeof(ifaliasreq))
!= B_OK)
return B_BAD_ADDRESS;
InterfaceAddress* address = NULL;
if (aliasRequest.ifra_index < 0) {
if (!domain->address_module->is_empty_address(
(const sockaddr*)&aliasRequest.ifra_addr, false)) {
// Find first address that matches the local address
address = AddressForLocal(domain,
(const sockaddr*)&aliasRequest.ifra_addr);
}
if (address == NULL) {
// Find first address for family
address = FirstForFamily(domain->family);
}
if (address == NULL) {
// Create new on the fly
address = new(std::nothrow) InterfaceAddress(this, domain);
if (address == NULL)
return B_NO_MEMORY;
status_t status = AddAddress(address);
if (status != B_OK) {
delete address;
return status;
}
// Note, even if setting the address failed, the empty
// address added here will still be added to the interface.
address->AcquireReference();
}
} else
address = AddressAt(aliasRequest.ifra_index);
if (address == NULL)
return B_BAD_VALUE;
status_t status = B_OK;
if (!domain->address_module->equal_addresses(
(sockaddr*)&aliasRequest.ifra_addr, address->local)) {
status = _ChangeAddress(locker, address, SIOCSIFADDR,
address->local, (sockaddr*)&aliasRequest.ifra_addr);
}
if (status == B_OK && !domain->address_module->equal_addresses(
(sockaddr*)&aliasRequest.ifra_mask, address->mask)
&& !domain->address_module->is_empty_address(
(sockaddr*)&aliasRequest.ifra_mask, false)) {
status = _ChangeAddress(locker, address, SIOCSIFNETMASK,
address->mask, (sockaddr*)&aliasRequest.ifra_mask);
}
if (status == B_OK && !domain->address_module->equal_addresses(
(sockaddr*)&aliasRequest.ifra_destination,
address->destination)
&& !domain->address_module->is_empty_address(
(sockaddr*)&aliasRequest.ifra_destination, false)) {
status = _ChangeAddress(locker, address,
(domain->address_module->flags
& NET_ADDRESS_MODULE_FLAG_BROADCAST_ADDRESS) != 0
? SIOCSIFBRDADDR : SIOCSIFDSTADDR,
address->destination,
(sockaddr*)&aliasRequest.ifra_destination);
}
address->ReleaseReference();
return status;
}
case SIOCSIFADDR:
case SIOCSIFNETMASK:
case SIOCSIFBRDADDR:
case SIOCSIFDSTADDR:
case SIOCDIFADDR:
{
if (length != sizeof(ifreq))
return B_BAD_VALUE;
RecursiveLocker locker(fLock);
InterfaceAddress* address = NULL;
sockaddr_storage newAddress;
size_t size = max_c(request.ifr_addr.sa_len, sizeof(sockaddr));
if (size > sizeof(sockaddr_storage))
size = sizeof(sockaddr_storage);
if (user_memcpy(&newAddress, &userRequest->ifr_addr, size) != B_OK)
return B_BAD_ADDRESS;
if (option == SIOCDIFADDR) {
// Find referring address - we can't use the hash, as another
// interface might use the same address.
AddressList::Iterator iterator = fAddresses.GetIterator();
while ((address = iterator.Next()) != NULL) {
if (address->domain == domain
&& domain->address_module->equal_addresses(
address->local, (sockaddr*)&newAddress))
break;
}
if (address == NULL)
return B_BAD_VALUE;
} else {
// Just use the first address for this family
address = _FirstForFamily(domain->family);
if (address == NULL) {
// Create new on the fly
address = new(std::nothrow) InterfaceAddress(this, domain);
if (address == NULL)
return B_NO_MEMORY;
status_t status = AddAddress(address);
if (status != B_OK) {
delete address;
return status;
}
// Note, even if setting the address failed, the empty
// address added here will still be added to the interface.
}
}
return _ChangeAddress(locker, address, option,
*address->AddressFor(option),
option != SIOCDIFADDR ? (sockaddr*)&newAddress : NULL);
}
default:
// pass the request into the datalink protocol stack
domain_datalink* datalink = DomainDatalink(domain->family);
if (datalink->first_info != NULL) {
return datalink->first_info->control(
datalink->first_protocol, option, userRequest, length);
}
break;
}
return B_BAD_VALUE;
}