NetServer: Add IPv6 link local address to each nic on boot
* Remove old ioctl code, cleanup AutoLooper. * Move link local code into NetServer AutoLooper should only be used for things that count as "auto-configuration" such as DHCP, router advertisements, and DHCPv6 * Properly form IPv6 link local address from MAC address * I think some IPv6 routes are needed still for proper local link connectivity. * Duplicate Address Detection is still a TODO * Style cleanup
This commit is contained in:
Alexander von Gluck IV
parent
0bbc9d0e04
commit
dd7f08b519
@ -1,9 +1,10 @@
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/*
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* Copyright 2006-2010, Haiku, Inc. All Rights Reserved.
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* Copyright 2006-2012, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Axel Dörfler, axeld@pinc-software.de
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* Alexander von Gluck, kallisti5@unixzen.com
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*/
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@ -33,7 +34,6 @@ AutoconfigLooper::AutoconfigLooper(BMessenger target, const char* device)
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fDevice(device),
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fCurrentClient(NULL)
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{
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memset(fCurrentMac, 0, sizeof(fCurrentMac));
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BMessage ready(kMsgReadyToRun);
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PostMessage(&ready);
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}
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@ -60,12 +60,12 @@ void
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AutoconfigLooper::_ConfigureIPv4()
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{
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// start with DHCP
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if (fCurrentClient == NULL) {
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fCurrentClient = new DHCPClient(fTarget, fDevice.String());
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AddHandler(fCurrentClient);
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}
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// set IFF_CONFIGURING flag on interface
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BNetworkInterface interface(fDevice.String());
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@ -120,157 +120,12 @@ AutoconfigLooper::_ConfigureIPv4()
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}
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#ifdef INET6
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static in6_addr
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BuildIPv6LinkLocalAddress(uint8 mac[6])
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{
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in6_addr result;
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result.s6_addr[0] = 0xfe;
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result.s6_addr[1] = 0x80;
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result.s6_addr[2] = 0;
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result.s6_addr[3] = 0;
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result.s6_addr[4] = 0;
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result.s6_addr[5] = 0;
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result.s6_addr[6] = 0;
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result.s6_addr[7] = 0;
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result.s6_addr[8] = mac[0] ^ 0x02;
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result.s6_addr[9] = mac[1];
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result.s6_addr[10] = mac[2];
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result.s6_addr[11] = 0xff;
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result.s6_addr[12] = 0xfe;
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result.s6_addr[13] = mac[3];
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result.s6_addr[14] = mac[4];
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result.s6_addr[15] = mac[5];
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return result;
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}
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void
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AutoconfigLooper::_ConfigureIPv6LinkLocal(bool add)
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{
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// do not touch the loopback device
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if (!strncmp(fDevice.String(), "loop", 4))
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return;
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ifreq request;
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if (!prepare_request(request, fDevice.String()))
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return;
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int socket = ::socket(AF_INET6, SOCK_DGRAM, 0);
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if (socket < 0)
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return;
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// set IFF_CONFIGURING flag on interface
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if (ioctl(socket, SIOCGIFFLAGS, &request, sizeof(struct ifreq)) == 0) {
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request.ifr_flags |= IFF_CONFIGURING;
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ioctl(socket, SIOCSIFFLAGS, &request, sizeof(struct ifreq));
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}
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uint8 mac[6];
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memcpy(mac, fCurrentMac, 6);
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if (add == true) {
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if (get_mac_address(fDevice.String(), mac) != B_OK)
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add = false;
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}
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if (add == true) {
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in6_addr inetAddress = BuildIPv6LinkLocalAddress(mac);
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if (_AddIPv6LinkLocal(socket, inetAddress) != true)
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add = false;
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// save the MAC address for later usage
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memcpy(fCurrentMac, mac, 6);
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}
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if (add == false) {
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static const uint8 zeroMac[6] = {0};
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if (memcmp(fCurrentMac, zeroMac, 6)) {
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in6_addr inetAddress = BuildIPv6LinkLocalAddress(fCurrentMac);
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_RemoveIPv6LinkLocal(socket, inetAddress);
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// reset the stored MAC address
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memcpy(fCurrentMac, zeroMac, 6);
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}
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}
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if (ioctl(socket, SIOCGIFFLAGS, &request, sizeof(struct ifreq)) == 0
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&& (request.ifr_flags & IFF_CONFIGURING) == 0) {
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// Someone else configured the interface in the mean time
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close(socket);
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return;
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}
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close(socket);
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}
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bool
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AutoconfigLooper::_AddIPv6LinkLocal(int socket, const in6_addr &address)
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{
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struct ifreq request;
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if (!prepare_request(request, fDevice.String()))
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return false;
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ifaliasreq aliasRequest;
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memset(&aliasRequest, 0, sizeof(ifaliasreq));
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strlcpy(aliasRequest.ifra_name, fDevice.String(), IF_NAMESIZE);
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aliasRequest.ifra_addr.ss_len = sizeof(sockaddr_in6);
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aliasRequest.ifra_addr.ss_family = AF_INET6;
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if (ioctl(socket, SIOCAIFADDR, &aliasRequest, sizeof(ifaliasreq)) < 0) {
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if (errno != B_NAME_IN_USE)
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return false;
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}
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sockaddr_in6* socketAddress = (sockaddr_in6*)&request.ifr_addr;
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socketAddress->sin6_len = sizeof(sockaddr_in6);
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socketAddress->sin6_family = AF_INET6;
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// address
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memcpy(&socketAddress->sin6_addr, &address, sizeof(in6_addr));
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if (ioctl(socket, SIOCSIFADDR, &request, sizeof(struct ifreq)) < 0)
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return false;
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// mask (/64)
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memset(socketAddress->sin6_addr.s6_addr, 0xff, 8);
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memset(socketAddress->sin6_addr.s6_addr + 8, 0, 8);
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if (ioctl(socket, SIOCSIFNETMASK, &request, sizeof(struct ifreq)) < 0)
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return false;
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return true;
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}
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void
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AutoconfigLooper::_RemoveIPv6LinkLocal(int socket, const in6_addr &address)
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{
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struct ifreq request;
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if (!prepare_request(request, fDevice.String()))
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return;
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sockaddr_in6* socketAddress = (sockaddr_in6*)&request.ifr_addr;
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socketAddress->sin6_len = sizeof(sockaddr_in6);
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socketAddress->sin6_family = AF_INET6;
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// address
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memcpy(&socketAddress->sin6_addr, &address, sizeof(in6_addr));
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if (ioctl(socket, SIOCDIFADDR, &request, sizeof(struct ifreq)) < 0)
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return;
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}
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#endif // INET6
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void
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AutoconfigLooper::_ReadyToRun()
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{
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start_watching_network(B_WATCH_NETWORK_LINK_CHANGES, this);
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_ConfigureIPv4();
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#ifdef INET6
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_ConfigureIPv6LinkLocal(true);
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#endif
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//_ConfigureIPv6(); // TODO: router advertisement and dhcpv6
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}
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@ -296,10 +151,8 @@ AutoconfigLooper::MessageReceived(BMessage* message)
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if ((media & IFM_ACTIVE) != 0) {
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// Reconfigure the interface when we have a link again
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_ConfigureIPv4();
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//_ConfigureIPv6(); // TODO: router advertisement and dhcpv6
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}
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#ifdef INET6
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_ConfigureIPv6LinkLocal((media & IFM_ACTIVE) != 0);
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#endif
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break;
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default:
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@ -29,15 +29,11 @@ public:
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private:
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void _RemoveClient();
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void _ConfigureIPv4();
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void _ConfigureIPv6LinkLocal(bool add);
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bool _AddIPv6LinkLocal(int socket, const in6_addr &);
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void _RemoveIPv6LinkLocal(int socket, const in6_addr &);
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void _ReadyToRun();
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BMessenger fTarget;
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BString fDevice;
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AutoconfigClient* fCurrentClient;
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uint8 fCurrentMac[6];
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};
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#endif // AUTOCONFIG_LOOPER_H
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@ -10,8 +10,6 @@ UseHeaders [ FDirName $(HAIKU_TOP) src libs compat freebsd_wlan ] : true ;
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#UseHeaders [ FDirName $(HAIKU_TOP) src add-ons kernel network ppp shared libkernelppp headers ] ;
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#UseHeaders [ FDirName $(HAIKU_TOP) src tests kits net DialUpPreflet ] ;
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#local defines = [ FDefines INET6=1 ] ;
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SubDirCcFlags $(defines) ;
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SubDirC++Flags $(defines) ;
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@ -1,10 +1,11 @@
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/*
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* Copyright 2006-2010, Haiku, Inc. All Rights Reserved.
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* Copyright 2006-2012, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Axel Dörfler, axeld@pinc-software.de
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* Vegard Wærp, vegarwa@online.no
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* Alexander von Gluck, kallisti5@unixzen.com
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*/
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@ -16,6 +17,7 @@
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#include <stdlib.h>
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#include <string>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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@ -79,6 +81,7 @@ private:
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BMessage* suggestedInterface = NULL);
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void _ConfigureInterfaces(
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BMessage* _missingDevice = NULL);
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void _ConfigureIPv6LinkLocal(const char* name);
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void _BringUpInterfaces();
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void _StartServices();
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status_t _HandleDeviceMonitor(BMessage* message);
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@ -105,13 +108,6 @@ struct address_family {
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};
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// AF_INET6 family
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#if INET6
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static bool inet6_parse_address(const char* string, sockaddr* address);
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static void inet6_set_any_address(sockaddr* address);
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static void inet6_set_port(sockaddr* address, int32 port);
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#endif
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static const address_family kFamilies[] = {
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{
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AF_INET,
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@ -209,44 +205,6 @@ parse_address(int32& family, const char* argument, BNetworkAddress& address)
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}
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#if INET6
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static bool
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inet6_parse_address(const char* string, sockaddr* _address)
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{
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sockaddr_in6& address = *(sockaddr_in6*)_address;
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if (inet_pton(AF_INET6, string, &address.sin6_addr) != 1)
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return false;
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address.sin6_family = AF_INET6;
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address.sin6_len = sizeof(sockaddr_in6);
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address.sin6_port = 0;
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address.sin6_flowinfo = 0;
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address.sin6_scope_id = 0;
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return true;
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}
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void
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inet6_set_any_address(sockaddr* _address)
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{
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sockaddr_in6& address = *(sockaddr_in6*)_address;
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memset(&address, 0, sizeof(sockaddr_in6));
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address.sin6_family = AF_INET6;
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address.sin6_len = sizeof(struct sockaddr_in6);
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}
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void
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inet6_set_port(sockaddr* _address, int32 port)
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{
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sockaddr_in6& address = *(sockaddr_in6*)_address;
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address.sin6_port = port;
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}
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#endif
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// #pragma mark -
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@ -574,6 +532,9 @@ NetServer::_ConfigureInterface(BMessage& message)
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}
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}
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// Set up IPv6 Link Local
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_ConfigureIPv6LinkLocal(name);
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BMessage addressMessage;
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for (int32 index = 0; message.FindMessage("address", index,
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&addressMessage) == B_OK; index++) {
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@ -619,7 +580,7 @@ NetServer::_ConfigureInterface(BMessage& message)
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if (addressMessage.FindString("broadcast", &string) == B_OK)
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parse_address(family, string, broadcast);
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}
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if (autoConfig) {
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_QuitLooperForDevice(name);
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startAutoConfig = true;
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@ -885,6 +846,86 @@ NetServer::_BringUpInterfaces()
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}
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void
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NetServer::_ConfigureIPv6LinkLocal(const char* name)
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{
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// Don't touch the loopback device
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if (!strncmp(name, "loop", 4))
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return;
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int socket = ::socket(AF_INET6, SOCK_DGRAM, 0);
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if (socket < 0) {
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// No ipv6 support, skip
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return;
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}
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close(socket);
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BNetworkInterface interface(name);
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BNetworkAddress link;
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status_t result = interface.GetHardwareAddress(link);
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if (result != B_OK)
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return;
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BString macString = link.ToString();
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int32 macLength = macString.Length();
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if (macLength != 17) {
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syslog(LOG_DEBUG, "%s: MacAddress length (%" B_PRIu32 ") for interface"
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" '%s' is invalid\n", __func__, macLength, name);
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return;
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}
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uint8 mac[6];
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char* macBuffer = macString.LockBuffer(macLength);
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sscanf(macBuffer, "%2hhx:%2hhx:%2hhx:%2hhx:%2hhx:%2hhx",
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&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]);
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macString.UnlockBuffer(macLength);
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// Check for a few failure situations
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static const char zeroMac[6] = {0, 0, 0, 0, 0, 0};
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static const char fullMac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
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if (memcmp(macBuffer, zeroMac, 6) == 0
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|| memcmp(macBuffer, fullMac, 6) == 0) {
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// Mac address is all 0 or all FF's
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syslog(LOG_DEBUG, "%s: MacAddress for interface '%s' is invalid.",
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__func__, name);
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return;
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}
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// Generate a Link Local Scope address
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// (IPv6 address based on Mac address)
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in6_addr addressRaw;
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memset(addressRaw.s6_addr, 0, sizeof(addressRaw.s6_addr));
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addressRaw.s6_addr[0] = 0xfe;
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addressRaw.s6_addr[1] = 0x80;
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addressRaw.s6_addr[8] = mac[0] ^ 0x02;
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addressRaw.s6_addr[9] = mac[1];
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addressRaw.s6_addr[10] = mac[2];
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addressRaw.s6_addr[11] = 0xff;
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addressRaw.s6_addr[12] = 0xfe;
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addressRaw.s6_addr[13] = mac[3];
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addressRaw.s6_addr[14] = mac[4];
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addressRaw.s6_addr[15] = mac[5];
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BNetworkAddress localLinkAddress(addressRaw, 0);
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BNetworkAddress localLinkMask("ffff:ffff:ffff:ffff::"); // 64
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BNetworkAddress localLinkBroadcast("fe80::ffff:ffff:ffff:ffff");
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BNetworkInterfaceAddress interfaceAddress;
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interfaceAddress.SetAddress(localLinkAddress);
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interfaceAddress.SetMask(localLinkMask);
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interfaceAddress.SetBroadcast(localLinkMask);
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/* TODO: Duplicate Address Detection. (DAD)
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Need to blast an icmp packet over the IPv6 network from :: to ensure
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there aren't duplicate MAC addresses on the network. (definitely an
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edge case, but a possible issue)
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*/
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interface.AddAddress(interfaceAddress);
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}
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void
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NetServer::_StartServices()
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{
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@ -910,12 +951,12 @@ NetServer::_HandleDeviceMonitor(BMessage* message)
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// not a device entry, ignore
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return B_NAME_NOT_FOUND;
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}
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if (opcode == B_ENTRY_CREATED)
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_ConfigureDevice(path);
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else
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_RemoveInterface(path);
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return B_OK;
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}
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