status_t
control_routes(struct net_interface* _interface, net_domain* domain,
int32 option, void* argument, size_t length)
{
TRACE("control_routes(interface %p, domain %p, option %" B_PRId32 ")\n",
_interface, domain, option);
Interface* interface = (Interface*)_interface;
switch (option) {
case SIOCADDRT:
case SIOCDELRT:
{
// add or remove a route
if (length != sizeof(struct ifreq))
return B_BAD_VALUE;
route_entry entry;
if (user_memcpy(&entry, &((ifreq*)argument)->ifr_route,
sizeof(route_entry)) != B_OK)
return B_BAD_ADDRESS;
net_route_private route;
status_t status;
if ((status = user_copy_address(entry.destination,
&route.destination)) != B_OK
|| (status = user_copy_address(entry.mask, &route.mask)) != B_OK
|| (status = user_copy_address(entry.gateway, &route.gateway))
!= B_OK)
return status;
InterfaceAddress* address
= interface->FirstForFamily(domain->family);
route.mtu = entry.mtu;
route.flags = entry.flags;
route.interface_address = address;
if (option == SIOCADDRT)
status = add_route(domain, &route);
else
status = remove_route(domain, &route);
if (address != NULL)
address->ReleaseReference();
return status;
}
}
return B_BAD_VALUE;
}
/*! Dumps a list of all interfaces into the supplied userland buffer.
If the interfaces don't fit into the buffer, an error (\c ENOBUFS) is
returned.
*/
status_t
list_interfaces(int family, void* _buffer, size_t* bufferSize)
{
RecursiveLocker locker(sLock);
UserBuffer buffer(_buffer, *bufferSize);
InterfaceList::Iterator iterator = sInterfaces.GetIterator();
while (Interface* interface = iterator.Next()) {
// Copy name
buffer.Push(interface->name, IF_NAMESIZE);
// Copy address
InterfaceAddress* address = interface->FirstForFamily(family);
size_t length = 0;
if (address != NULL && address->local != NULL) {
// Actual address
buffer.Push(address->local, length = address->local->sa_len);
} else {
// Empty address
sockaddr empty;
empty.sa_len = 2;
empty.sa_family = AF_UNSPEC;
buffer.Push(&empty, length = empty.sa_len);
}
if (address != NULL)
address->ReleaseReference();
if (IF_NAMESIZE + length < sizeof(ifreq)) {
// Make sure at least sizeof(ifreq) bytes are written for each
// interface for compatibility with other platforms
buffer.Pad(sizeof(ifreq) - IF_NAMESIZE - length);
}
if (buffer.Status() != B_OK)
return buffer.Status();
}
*bufferSize = buffer.BytesConsumed();
return B_OK;
}
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;
}