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util: new files virnetdevip.[ch] for IP-related netdev functions
This patch splits virnetdev.[ch] into multiple files, with the new virnetdevip.[ch] containing all the functions related to setting and retrieving IP-related info for a device (both addresses and routes).
This commit is contained in:
Laine Stump
parent
9658e70f7d
commit
cf0568b0af
@ -213,6 +213,7 @@ src/util/virlog.c
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src/util/virnetdev.c
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src/util/virnetdevbandwidth.c
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src/util/virnetdevbridge.c
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src/util/virnetdevip.c
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src/util/virnetdevmacvlan.c
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src/util/virnetdevmidonet.c
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src/util/virnetdevopenvswitch.c
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@ -138,6 +138,7 @@ UTIL_SOURCES = \
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util/virnetdev.h util/virnetdev.c \
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util/virnetdevbandwidth.h util/virnetdevbandwidth.c \
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util/virnetdevbridge.h util/virnetdevbridge.c \
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util/virnetdevip.h util/virnetdevip.c \
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util/virnetdevmacvlan.c util/virnetdevmacvlan.h \
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util/virnetdevmidonet.h util/virnetdevmidonet.c \
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util/virnetdevopenvswitch.h util/virnetdevopenvswitch.c \
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@ -1856,15 +1856,12 @@ virMacAddrSetRaw;
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# util/virnetdev.h
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virNetDevAddMulti;
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virNetDevAddRoute;
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virNetDevClearIPAddress;
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virNetDevDelMulti;
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virNetDevExists;
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virNetDevFeatureTypeFromString;
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virNetDevFeatureTypeToString;
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virNetDevGetFeatures;
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virNetDevGetIndex;
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virNetDevGetIPAddress;
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virNetDevGetLinkInfo;
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virNetDevGetMAC;
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virNetDevGetMTU;
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@ -1890,7 +1887,6 @@ virNetDevRxFilterFree;
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virNetDevRxFilterModeTypeFromString;
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virNetDevRxFilterModeTypeToString;
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virNetDevRxFilterNew;
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virNetDevSetIPAddress;
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virNetDevSetMAC;
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virNetDevSetMTU;
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virNetDevSetMTUFromDevice;
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@ -1903,7 +1899,6 @@ virNetDevSetRcvMulti;
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virNetDevSetupControl;
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virNetDevSysfsFile;
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virNetDevValidateConfig;
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virNetDevWaitDadFinish;
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# util/virnetdevbandwidth.h
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@ -1937,6 +1932,14 @@ virNetDevBridgeSetSTPDelay;
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virNetDevBridgeSetVlanFiltering;
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# util/virnetdevip.h
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virNetDevIPAddrAdd;
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virNetDevIPAddrDel;
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virNetDevIPAddrGet;
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virNetDevIPRouteAdd;
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virNetDevIPWaitDadFinish;
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# util/virnetdevmacvlan.h
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virNetDevMacVLanCreate;
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virNetDevMacVLanCreateWithVPortProfile;
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@ -66,7 +66,7 @@
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#include "virfile.h"
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#include "virusb.h"
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#include "vircommand.h"
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#include "virnetdev.h"
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#include "virnetdevip.h"
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#include "virprocess.h"
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#include "virstring.h"
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@ -528,7 +528,7 @@ static int lxcContainerRenameAndEnableInterfaces(virDomainDefPtr vmDef,
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VIR_DEBUG("Adding IP address '%s/%d' to '%s'",
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ipStr, prefix, newname);
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if (virNetDevSetIPAddress(newname, &ip->address, NULL, prefix) < 0) {
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if (virNetDevIPAddrAdd(newname, &ip->address, NULL, prefix) < 0) {
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virReportError(VIR_ERR_SYSTEM_ERROR,
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_("Failed to set IP address '%s' on %s"),
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ipStr, newname);
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@ -549,11 +549,11 @@ static int lxcContainerRenameAndEnableInterfaces(virDomainDefPtr vmDef,
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for (j = 0; j < netDef->nroutes; j++) {
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virNetworkRouteDefPtr route = netDef->routes[j];
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if (virNetDevAddRoute(newname,
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virNetworkRouteDefGetAddress(route),
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virNetworkRouteDefGetPrefix(route),
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virNetworkRouteDefGetGateway(route),
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virNetworkRouteDefGetMetric(route)) < 0) {
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if (virNetDevIPRouteAdd(newname,
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virNetworkRouteDefGetAddress(route),
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virNetworkRouteDefGetPrefix(route),
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virNetworkRouteDefGetGateway(route),
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virNetworkRouteDefGetMetric(route)) < 0) {
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goto error_out;
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}
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VIR_FREE(toStr);
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@ -62,10 +62,11 @@
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#include "virdnsmasq.h"
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#include "configmake.h"
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#include "virnetdev.h"
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#include "virpci.h"
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#include "virnetdevip.h"
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#include "virnetdevbridge.h"
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#include "virnetdevtap.h"
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#include "virnetdevvportprofile.h"
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#include "virpci.h"
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#include "virdbus.h"
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#include "virfile.h"
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#include "virstring.h"
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@ -1977,8 +1978,8 @@ networkAddAddrToBridge(virNetworkObjPtr network,
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return -1;
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}
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if (virNetDevSetIPAddress(network->def->bridge,
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&ipdef->address, NULL, prefix) < 0)
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if (virNetDevIPAddrAdd(network->def->bridge,
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&ipdef->address, NULL, prefix) < 0)
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return -1;
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return 0;
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@ -2025,8 +2026,8 @@ networkAddRouteToBridge(virNetworkObjPtr network,
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return -1;
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}
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if (virNetDevAddRoute(network->def->bridge, addr,
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prefix, gateway, metric) < 0) {
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if (virNetDevIPRouteAdd(network->def->bridge, addr,
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prefix, gateway, metric) < 0) {
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return -1;
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}
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return 0;
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@ -2049,7 +2050,7 @@ networkWaitDadFinish(virNetworkObjPtr network)
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goto cleanup;
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}
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ret = (naddrs == 0) ? 0 : virNetDevWaitDadFinish(addrs, naddrs);
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ret = (naddrs == 0) ? 0 : virNetDevIPWaitDadFinish(addrs, naddrs);
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cleanup:
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VIR_FREE(addrs);
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@ -4760,7 +4761,7 @@ networkGetNetworkAddress(const char *netname, char **netaddr)
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}
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if (dev_name) {
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if (virNetDevGetIPAddress(dev_name, &addr) < 0)
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if (virNetDevIPAddrGet(dev_name, &addr) < 0)
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goto cleanup;
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addrptr = &addr;
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}
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@ -34,10 +34,6 @@
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#include "virstring.h"
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#include "virutil.h"
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#if HAVE_GETIFADDRS
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# include <ifaddrs.h>
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#endif
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <fcntl.h>
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@ -97,7 +93,6 @@ VIR_LOG_INIT("util.netdev");
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# define FEATURE_BIT_IS_SET(blocks, index, field) \
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(FEATURE_WORD(blocks, index, field) & FEATURE_FIELD_FLAG(index))
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#endif
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#define VIR_DAD_WAIT_TIMEOUT 20 /* seconds */
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typedef enum {
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VIR_MCAST_TYPE_INDEX_TOKEN,
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@ -1012,712 +1007,6 @@ int virNetDevGetVLanID(const char *ifname ATTRIBUTE_UNUSED,
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#endif /* ! SIOCGIFVLAN */
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#if defined(__linux__) && defined(HAVE_LIBNL)
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static int
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virNetDevGetIPAddressBinary(virSocketAddr *addr, void **data, size_t *len)
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{
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if (!addr)
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return -1;
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switch (VIR_SOCKET_ADDR_FAMILY(addr)) {
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case AF_INET:
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*data = &addr->data.inet4.sin_addr;
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*len = sizeof(struct in_addr);
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break;
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case AF_INET6:
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*data = &addr->data.inet6.sin6_addr;
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*len = sizeof(struct in6_addr);
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break;
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default:
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return -1;
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}
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return 0;
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}
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static struct nl_msg *
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virNetDevCreateNetlinkAddressMessage(int messageType,
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const char *ifname,
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virSocketAddr *addr,
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unsigned int prefix,
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virSocketAddr *broadcast,
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virSocketAddr *peer)
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{
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struct nl_msg *nlmsg = NULL;
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struct ifaddrmsg ifa;
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unsigned int ifindex;
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void *addrData = NULL;
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void *peerData = NULL;
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void *broadcastData = NULL;
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size_t addrDataLen;
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if (virNetDevGetIPAddressBinary(addr, &addrData, &addrDataLen) < 0)
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return NULL;
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if (peer && VIR_SOCKET_ADDR_VALID(peer)) {
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if (virNetDevGetIPAddressBinary(peer, &peerData, &addrDataLen) < 0)
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return NULL;
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} else if (broadcast) {
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if (virNetDevGetIPAddressBinary(broadcast, &broadcastData,
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&addrDataLen) < 0)
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return NULL;
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}
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/* Get the interface index */
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if ((ifindex = if_nametoindex(ifname)) == 0)
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return NULL;
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if (!(nlmsg = nlmsg_alloc_simple(messageType,
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NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL))) {
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virReportOOMError();
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return NULL;
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}
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memset(&ifa, 0, sizeof(ifa));
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ifa.ifa_prefixlen = prefix;
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ifa.ifa_family = VIR_SOCKET_ADDR_FAMILY(addr);
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ifa.ifa_index = ifindex;
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ifa.ifa_scope = 0;
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if (nlmsg_append(nlmsg, &ifa, sizeof(ifa), NLMSG_ALIGNTO) < 0)
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goto buffer_too_small;
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if (nla_put(nlmsg, IFA_LOCAL, addrDataLen, addrData) < 0)
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goto buffer_too_small;
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if (peerData) {
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if (nla_put(nlmsg, IFA_ADDRESS, addrDataLen, peerData) < 0)
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goto buffer_too_small;
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}
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if (broadcastData) {
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if (nla_put(nlmsg, IFA_BROADCAST, addrDataLen, broadcastData) < 0)
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goto buffer_too_small;
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}
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return nlmsg;
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buffer_too_small:
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("allocated netlink buffer is too small"));
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nlmsg_free(nlmsg);
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return NULL;
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}
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/**
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* virNetDevSetIPAddress:
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* @ifname: the interface name
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* @addr: the IP address (IPv4 or IPv6)
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* @peer: The IP address of peer (IPv4 or IPv6)
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* @prefix: number of 1 bits in the netmask
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*
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* Add an IP address to an interface. This function *does not* remove
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* any previously added IP addresses - that must be done separately with
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* brDelInetAddress.
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*
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* Returns 0 in case of success or -1 in case of error.
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*/
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int virNetDevSetIPAddress(const char *ifname,
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virSocketAddr *addr,
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virSocketAddr *peer,
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unsigned int prefix)
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{
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virSocketAddr *broadcast = NULL;
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int ret = -1;
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struct nl_msg *nlmsg = NULL;
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struct nlmsghdr *resp = NULL;
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unsigned int recvbuflen;
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/* The caller needs to provide a correct address */
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if (VIR_SOCKET_ADDR_FAMILY(addr) == AF_INET &&
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!(peer && VIR_SOCKET_ADDR_VALID(peer))) {
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/* compute a broadcast address if this is IPv4 */
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if (VIR_ALLOC(broadcast) < 0)
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return -1;
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if (virSocketAddrBroadcastByPrefix(addr, prefix, broadcast) < 0)
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goto cleanup;
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}
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if (!(nlmsg = virNetDevCreateNetlinkAddressMessage(RTM_NEWADDR, ifname,
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addr, prefix,
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broadcast, peer)))
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goto cleanup;
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if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
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NETLINK_ROUTE, 0) < 0)
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goto cleanup;
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if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
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virReportError(VIR_ERR_SYSTEM_ERROR,
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_("Error adding IP address to %s"), ifname);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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nlmsg_free(nlmsg);
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VIR_FREE(resp);
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VIR_FREE(broadcast);
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return ret;
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}
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/**
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* virNetDevAddRoute:
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* @ifname: the interface name
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* @addr: the IP network address (IPv4 or IPv6)
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* @prefix: number of 1 bits in the netmask
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* @gateway: via address for route (same as @addr)
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*
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* Add a route for a network IP address to an interface. This function
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* *does not* remove any previously added IP static routes.
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*
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* Returns 0 in case of success or -1 in case of error.
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*/
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int
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virNetDevAddRoute(const char *ifname,
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virSocketAddrPtr addr,
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unsigned int prefix,
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virSocketAddrPtr gateway,
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unsigned int metric)
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{
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int ret = -1;
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struct nl_msg *nlmsg = NULL;
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struct nlmsghdr *resp = NULL;
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unsigned int recvbuflen;
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unsigned int ifindex;
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struct rtmsg rtmsg;
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void *gatewayData = NULL;
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void *addrData = NULL;
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size_t addrDataLen;
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int errCode;
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virSocketAddr defaultAddr;
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virSocketAddrPtr actualAddr;
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char *toStr = NULL;
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char *viaStr = NULL;
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actualAddr = addr;
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/* If we have no valid network address, then use the default one */
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if (!addr || !VIR_SOCKET_ADDR_VALID(addr)) {
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VIR_DEBUG("computing default address");
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int family = VIR_SOCKET_ADDR_FAMILY(gateway);
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if (family == AF_INET) {
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if (virSocketAddrParseIPv4(&defaultAddr, VIR_SOCKET_ADDR_IPV4_ALL) < 0)
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goto cleanup;
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} else {
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if (virSocketAddrParseIPv6(&defaultAddr, VIR_SOCKET_ADDR_IPV6_ALL) < 0)
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goto cleanup;
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}
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actualAddr = &defaultAddr;
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}
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toStr = virSocketAddrFormat(actualAddr);
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viaStr = virSocketAddrFormat(gateway);
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VIR_DEBUG("Adding route %s/%d via %s", toStr, prefix, viaStr);
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if (virNetDevGetIPAddressBinary(actualAddr, &addrData, &addrDataLen) < 0 ||
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virNetDevGetIPAddressBinary(gateway, &gatewayData, &addrDataLen) < 0)
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goto cleanup;
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/* Get the interface index */
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if ((ifindex = if_nametoindex(ifname)) == 0)
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goto cleanup;
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if (!(nlmsg = nlmsg_alloc_simple(RTM_NEWROUTE,
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NLM_F_REQUEST | NLM_F_CREATE |
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NLM_F_EXCL))) {
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virReportOOMError();
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goto cleanup;
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}
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memset(&rtmsg, 0, sizeof(rtmsg));
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rtmsg.rtm_family = VIR_SOCKET_ADDR_FAMILY(gateway);
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rtmsg.rtm_table = RT_TABLE_MAIN;
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rtmsg.rtm_scope = RT_SCOPE_UNIVERSE;
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rtmsg.rtm_protocol = RTPROT_BOOT;
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rtmsg.rtm_type = RTN_UNICAST;
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rtmsg.rtm_dst_len = prefix;
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if (nlmsg_append(nlmsg, &rtmsg, sizeof(rtmsg), NLMSG_ALIGNTO) < 0)
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goto buffer_too_small;
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if (prefix > 0 && nla_put(nlmsg, RTA_DST, addrDataLen, addrData) < 0)
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goto buffer_too_small;
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if (nla_put(nlmsg, RTA_GATEWAY, addrDataLen, gatewayData) < 0)
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goto buffer_too_small;
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if (nla_put_u32(nlmsg, RTA_OIF, ifindex) < 0)
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goto buffer_too_small;
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if (metric > 0 && nla_put_u32(nlmsg, RTA_PRIORITY, metric) < 0)
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goto buffer_too_small;
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if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
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NETLINK_ROUTE, 0) < 0)
|
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goto cleanup;
|
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|
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if ((errCode = virNetlinkGetErrorCode(resp, recvbuflen)) < 0) {
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virReportSystemError(errCode, _("Error adding route to %s"), ifname);
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goto cleanup;
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}
|
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ret = 0;
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cleanup:
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VIR_FREE(toStr);
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VIR_FREE(viaStr);
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nlmsg_free(nlmsg);
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return ret;
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buffer_too_small:
|
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("allocated netlink buffer is too small"));
|
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goto cleanup;
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}
|
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|
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/**
|
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* virNetDevClearIPAddress:
|
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* @ifname: the interface name
|
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* @addr: the IP address (IPv4 or IPv6)
|
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* @prefix: number of 1 bits in the netmask
|
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*
|
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* Delete an IP address from an interface.
|
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*
|
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* Returns 0 in case of success or -1 in case of error.
|
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*/
|
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int virNetDevClearIPAddress(const char *ifname,
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virSocketAddr *addr,
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unsigned int prefix)
|
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{
|
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int ret = -1;
|
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struct nl_msg *nlmsg = NULL;
|
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struct nlmsghdr *resp = NULL;
|
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unsigned int recvbuflen;
|
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|
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if (!(nlmsg = virNetDevCreateNetlinkAddressMessage(RTM_DELADDR, ifname,
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addr, prefix,
|
||||
NULL, NULL)))
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
|
||||
NETLINK_ROUTE, 0) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR,
|
||||
_("Error removing IP address from %s"), ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
nlmsg_free(nlmsg);
|
||||
VIR_FREE(resp);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* return true if there is a known address with 'tentative' flag set */
|
||||
static bool
|
||||
virNetDevParseDadStatus(struct nlmsghdr *nlh, int len,
|
||||
virSocketAddrPtr *addrs, size_t count)
|
||||
{
|
||||
struct ifaddrmsg *ifaddrmsg_ptr;
|
||||
unsigned int ifaddrmsg_len;
|
||||
struct rtattr *rtattr_ptr;
|
||||
size_t i;
|
||||
struct in6_addr *addr;
|
||||
|
||||
VIR_WARNINGS_NO_CAST_ALIGN
|
||||
for (; NLMSG_OK(nlh, len); nlh = NLMSG_NEXT(nlh, len)) {
|
||||
VIR_WARNINGS_RESET
|
||||
if (NLMSG_PAYLOAD(nlh, 0) < sizeof(struct ifaddrmsg)) {
|
||||
/* Message without payload is the last one. */
|
||||
break;
|
||||
}
|
||||
|
||||
ifaddrmsg_ptr = (struct ifaddrmsg *)NLMSG_DATA(nlh);
|
||||
if (!(ifaddrmsg_ptr->ifa_flags & IFA_F_TENTATIVE)) {
|
||||
/* Not tentative: we are not interested in this entry. */
|
||||
continue;
|
||||
}
|
||||
|
||||
ifaddrmsg_len = IFA_PAYLOAD(nlh);
|
||||
VIR_WARNINGS_NO_CAST_ALIGN
|
||||
rtattr_ptr = (struct rtattr *) IFA_RTA(ifaddrmsg_ptr);
|
||||
for (; RTA_OK(rtattr_ptr, ifaddrmsg_len);
|
||||
rtattr_ptr = RTA_NEXT(rtattr_ptr, ifaddrmsg_len)) {
|
||||
VIR_WARNINGS_RESET
|
||||
if (RTA_PAYLOAD(rtattr_ptr) != sizeof(struct in6_addr)) {
|
||||
/* No address: ignore. */
|
||||
continue;
|
||||
}
|
||||
|
||||
/* We check only known addresses. */
|
||||
for (i = 0; i < count; i++) {
|
||||
addr = &addrs[i]->data.inet6.sin6_addr;
|
||||
if (!memcmp(addr, RTA_DATA(rtattr_ptr),
|
||||
sizeof(struct in6_addr))) {
|
||||
/* We found matching tentative address. */
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/* return after DAD finishes for all known IPv6 addresses or an error */
|
||||
int
|
||||
virNetDevWaitDadFinish(virSocketAddrPtr *addrs, size_t count)
|
||||
{
|
||||
struct nl_msg *nlmsg = NULL;
|
||||
struct ifaddrmsg ifa;
|
||||
struct nlmsghdr *resp = NULL;
|
||||
unsigned int recvbuflen;
|
||||
int ret = -1;
|
||||
bool dad = true;
|
||||
time_t max_time = time(NULL) + VIR_DAD_WAIT_TIMEOUT;
|
||||
|
||||
if (!(nlmsg = nlmsg_alloc_simple(RTM_GETADDR,
|
||||
NLM_F_REQUEST | NLM_F_DUMP))) {
|
||||
virReportOOMError();
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&ifa, 0, sizeof(ifa));
|
||||
/* DAD is for IPv6 adresses only. */
|
||||
ifa.ifa_family = AF_INET6;
|
||||
if (nlmsg_append(nlmsg, &ifa, sizeof(ifa), NLMSG_ALIGNTO) < 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("allocated netlink buffer is too small"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
/* Periodically query netlink until DAD finishes on all known addresses. */
|
||||
while (dad && time(NULL) < max_time) {
|
||||
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
|
||||
NETLINK_ROUTE, 0) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR, "%s",
|
||||
_("error reading DAD state information"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
/* Parse response. */
|
||||
dad = virNetDevParseDadStatus(resp, recvbuflen, addrs, count);
|
||||
if (dad)
|
||||
usleep(1000 * 10);
|
||||
|
||||
VIR_FREE(resp);
|
||||
}
|
||||
/* Check timeout. */
|
||||
if (dad) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR,
|
||||
_("Duplicate Address Detection "
|
||||
"not finished in %d seconds"), VIR_DAD_WAIT_TIMEOUT);
|
||||
} else {
|
||||
ret = 0;
|
||||
}
|
||||
|
||||
cleanup:
|
||||
VIR_FREE(resp);
|
||||
nlmsg_free(nlmsg);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#else /* defined(__linux__) && defined(HAVE_LIBNL) */
|
||||
|
||||
int virNetDevSetIPAddress(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
virSocketAddr *peer,
|
||||
unsigned int prefix)
|
||||
{
|
||||
virCommandPtr cmd = NULL;
|
||||
char *addrstr = NULL, *bcaststr = NULL, *peerstr = NULL;
|
||||
virSocketAddr broadcast;
|
||||
int ret = -1;
|
||||
|
||||
if (!(addrstr = virSocketAddrFormat(addr)))
|
||||
goto cleanup;
|
||||
|
||||
if (peer && VIR_SOCKET_ADDR_VALID(peer) && !(peerstr = virSocketAddrFormat(peer)))
|
||||
goto cleanup;
|
||||
|
||||
/* format up a broadcast address if this is IPv4 */
|
||||
if (!peerstr && ((VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET)) &&
|
||||
((virSocketAddrBroadcastByPrefix(addr, prefix, &broadcast) < 0) ||
|
||||
!(bcaststr = virSocketAddrFormat(&broadcast))))) {
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
# ifdef IFCONFIG_PATH
|
||||
cmd = virCommandNew(IFCONFIG_PATH);
|
||||
virCommandAddArg(cmd, ifname);
|
||||
if (VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET6))
|
||||
virCommandAddArg(cmd, "inet6");
|
||||
else
|
||||
virCommandAddArg(cmd, "inet");
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
if (peerstr)
|
||||
virCommandAddArgList(cmd, "pointopoint", peerstr, NULL);
|
||||
if (bcaststr)
|
||||
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
|
||||
virCommandAddArg(cmd, "alias");
|
||||
# else
|
||||
cmd = virCommandNew(IP_PATH);
|
||||
virCommandAddArgList(cmd, "addr", "add", NULL);
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
if (peerstr)
|
||||
virCommandAddArgList(cmd, "peer", peerstr, NULL);
|
||||
if (bcaststr)
|
||||
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
|
||||
virCommandAddArgList(cmd, "dev", ifname, NULL);
|
||||
# endif
|
||||
|
||||
if (virCommandRun(cmd, NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(addrstr);
|
||||
VIR_FREE(bcaststr);
|
||||
VIR_FREE(peerstr);
|
||||
virCommandFree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int
|
||||
virNetDevAddRoute(const char *ifname,
|
||||
virSocketAddrPtr addr,
|
||||
unsigned int prefix,
|
||||
virSocketAddrPtr gateway,
|
||||
unsigned int metric)
|
||||
{
|
||||
virCommandPtr cmd = NULL;
|
||||
char *addrstr = NULL, *gatewaystr = NULL;
|
||||
int ret = -1;
|
||||
|
||||
if (!(addrstr = virSocketAddrFormat(addr)))
|
||||
goto cleanup;
|
||||
if (!(gatewaystr = virSocketAddrFormat(gateway)))
|
||||
goto cleanup;
|
||||
cmd = virCommandNew(IP_PATH);
|
||||
virCommandAddArgList(cmd, "route", "add", NULL);
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
virCommandAddArgList(cmd, "via", gatewaystr, "dev", ifname,
|
||||
"proto", "static", "metric", NULL);
|
||||
virCommandAddArgFormat(cmd, "%u", metric);
|
||||
|
||||
if (virCommandRun(cmd, NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(addrstr);
|
||||
VIR_FREE(gatewaystr);
|
||||
virCommandFree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int virNetDevClearIPAddress(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
unsigned int prefix)
|
||||
{
|
||||
virCommandPtr cmd = NULL;
|
||||
char *addrstr;
|
||||
int ret = -1;
|
||||
|
||||
if (!(addrstr = virSocketAddrFormat(addr)))
|
||||
goto cleanup;
|
||||
# ifdef IFCONFIG_PATH
|
||||
cmd = virCommandNew(IFCONFIG_PATH);
|
||||
virCommandAddArg(cmd, ifname);
|
||||
if (VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET6))
|
||||
virCommandAddArg(cmd, "inet6");
|
||||
else
|
||||
virCommandAddArg(cmd, "inet");
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
virCommandAddArg(cmd, "-alias");
|
||||
# else
|
||||
cmd = virCommandNew(IP_PATH);
|
||||
virCommandAddArgList(cmd, "addr", "del", NULL);
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
virCommandAddArgList(cmd, "dev", ifname, NULL);
|
||||
# endif
|
||||
|
||||
if (virCommandRun(cmd, NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(addrstr);
|
||||
virCommandFree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* return after DAD finishes for all known IPv6 addresses or an error */
|
||||
int
|
||||
virNetDevWaitDadFinish(virSocketAddrPtr *addrs ATTRIBUTE_UNUSED,
|
||||
size_t count ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to wait for IPv6 DAD on this platform"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif /* defined(__linux__) && defined(HAVE_LIBNL) */
|
||||
|
||||
/**
|
||||
* virNetDevGetIPv4AddressIoctl:
|
||||
* @ifname: name of the interface whose IP address we want
|
||||
* @addr: filled with the IPv4 address
|
||||
*
|
||||
* This function gets the IPv4 address for the interface @ifname
|
||||
* and stores it in @addr
|
||||
*
|
||||
* Returns 0 on success, -errno on failure.
|
||||
*/
|
||||
#if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ)
|
||||
static int
|
||||
virNetDevGetIPv4AddressIoctl(const char *ifname,
|
||||
virSocketAddrPtr addr)
|
||||
{
|
||||
int fd = -1;
|
||||
int ret = -1;
|
||||
struct ifreq ifr;
|
||||
|
||||
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
|
||||
return -1;
|
||||
|
||||
if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Unable to get IPv4 address for interface %s via ioctl"),
|
||||
ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
addr->data.stor.ss_family = AF_INET;
|
||||
addr->len = sizeof(addr->data.inet4);
|
||||
memcpy(&addr->data.inet4, &ifr.ifr_addr, addr->len);
|
||||
ret = 0;
|
||||
|
||||
cleanup:
|
||||
VIR_FORCE_CLOSE(fd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#else /* ! SIOCGIFADDR */
|
||||
|
||||
static int
|
||||
virNetDevGetIPv4AddressIoctl(const char *ifname ATTRIBUTE_UNUSED,
|
||||
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
|
||||
{
|
||||
return -2;
|
||||
}
|
||||
|
||||
#endif /* ! SIOCGIFADDR */
|
||||
|
||||
/**
|
||||
* virNetDevGetifaddrsAddress:
|
||||
* @ifname: name of the interface whose IP address we want
|
||||
* @addr: filled with the IP address
|
||||
*
|
||||
* This function gets the IP address for the interface @ifname
|
||||
* and stores it in @addr
|
||||
*
|
||||
* Returns 0 on success, -1 on failure, -2 on unsupported.
|
||||
*/
|
||||
#if HAVE_GETIFADDRS
|
||||
static int
|
||||
virNetDevGetifaddrsAddress(const char *ifname,
|
||||
virSocketAddrPtr addr)
|
||||
{
|
||||
struct ifaddrs *ifap, *ifa;
|
||||
int ret = -1;
|
||||
|
||||
if (getifaddrs(&ifap) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Could not get interface list for '%s'"),
|
||||
ifname);
|
||||
return -1;
|
||||
}
|
||||
|
||||
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
|
||||
int family = ifa->ifa_addr->sa_family;
|
||||
|
||||
if (STRNEQ_NULLABLE(ifa->ifa_name, ifname))
|
||||
continue;
|
||||
if (family != AF_INET6 && family != AF_INET)
|
||||
continue;
|
||||
|
||||
if (family == AF_INET6) {
|
||||
addr->len = sizeof(addr->data.inet6);
|
||||
memcpy(&addr->data.inet6, ifa->ifa_addr, addr->len);
|
||||
} else {
|
||||
addr->len = sizeof(addr->data.inet4);
|
||||
memcpy(&addr->data.inet4, ifa->ifa_addr, addr->len);
|
||||
}
|
||||
addr->data.stor.ss_family = family;
|
||||
ret = 0;
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR,
|
||||
_("no IP address found for interface '%s'"),
|
||||
ifname);
|
||||
cleanup:
|
||||
freeifaddrs(ifap);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#else /* ! HAVE_GETIFADDRS */
|
||||
|
||||
static int
|
||||
virNetDevGetifaddrsAddress(const char *ifname ATTRIBUTE_UNUSED,
|
||||
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
|
||||
{
|
||||
return -2;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/**
|
||||
* virNetDevGetIPAddress:
|
||||
* @ifname: name of the interface whose IP address we want
|
||||
* @addr: filled with the IPv4 address
|
||||
*
|
||||
* This function gets the IPv4 address for the interface @ifname
|
||||
* and stores it in @addr
|
||||
*
|
||||
* Returns 0 on success, -errno on failure.
|
||||
*/
|
||||
int
|
||||
virNetDevGetIPAddress(const char *ifname,
|
||||
virSocketAddrPtr addr)
|
||||
{
|
||||
int ret;
|
||||
|
||||
memset(addr, 0, sizeof(*addr));
|
||||
addr->data.stor.ss_family = AF_UNSPEC;
|
||||
|
||||
if ((ret = virNetDevGetifaddrsAddress(ifname, addr)) != -2)
|
||||
return ret;
|
||||
|
||||
if ((ret = virNetDevGetIPv4AddressIoctl(ifname, addr)) != -2)
|
||||
return ret;
|
||||
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to get IP address on this platform"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* virNetDevValidateConfig:
|
||||
* @ifname: Name of the interface
|
||||
|
||||
778
src/util/virnetdevip.c
Normal file
778
src/util/virnetdevip.c
Normal file
@ -0,0 +1,778 @@
|
||||
/*
|
||||
* Copyright (C) 2007-2016 Red Hat, Inc.
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library. If not, see
|
||||
* <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* Authors:
|
||||
* Mark McLoughlin <markmc@redhat.com>
|
||||
* Daniel P. Berrange <berrange@redhat.com>
|
||||
*/
|
||||
|
||||
#include <config.h>
|
||||
|
||||
#include "virnetdevip.h"
|
||||
#include "virnetdev.h"
|
||||
#include "virnetlink.h"
|
||||
#include "virfile.h"
|
||||
#include "virerror.h"
|
||||
#include "viralloc.h"
|
||||
#include "virlog.h"
|
||||
#include "virstring.h"
|
||||
#include "virutil.h"
|
||||
|
||||
#if HAVE_GETIFADDRS
|
||||
# include <ifaddrs.h>
|
||||
#endif
|
||||
|
||||
#include <sys/ioctl.h>
|
||||
#include <net/if.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#ifdef __linux__
|
||||
# include <linux/sockios.h>
|
||||
# include <linux/if_vlan.h>
|
||||
# define VIR_NETDEV_FAMILY AF_PACKET
|
||||
#elif defined(HAVE_STRUCT_IFREQ) && defined(AF_LOCAL)
|
||||
# define VIR_NETDEV_FAMILY AF_LOCAL
|
||||
#else
|
||||
# undef HAVE_STRUCT_IFREQ
|
||||
#endif
|
||||
|
||||
#define VIR_DAD_WAIT_TIMEOUT 20 /* seconds */
|
||||
|
||||
#define VIR_FROM_THIS VIR_FROM_NONE
|
||||
|
||||
VIR_LOG_INIT("util.netdevip");
|
||||
|
||||
#if defined(__linux__) && defined(HAVE_LIBNL)
|
||||
|
||||
static int
|
||||
virNetDevGetIPAddressBinary(virSocketAddr *addr, void **data, size_t *len)
|
||||
{
|
||||
if (!addr)
|
||||
return -1;
|
||||
|
||||
switch (VIR_SOCKET_ADDR_FAMILY(addr)) {
|
||||
case AF_INET:
|
||||
*data = &addr->data.inet4.sin_addr;
|
||||
*len = sizeof(struct in_addr);
|
||||
break;
|
||||
case AF_INET6:
|
||||
*data = &addr->data.inet6.sin6_addr;
|
||||
*len = sizeof(struct in6_addr);
|
||||
break;
|
||||
default:
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct nl_msg *
|
||||
virNetDevCreateNetlinkAddressMessage(int messageType,
|
||||
const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
unsigned int prefix,
|
||||
virSocketAddr *broadcast,
|
||||
virSocketAddr *peer)
|
||||
{
|
||||
struct nl_msg *nlmsg = NULL;
|
||||
struct ifaddrmsg ifa;
|
||||
unsigned int ifindex;
|
||||
void *addrData = NULL;
|
||||
void *peerData = NULL;
|
||||
void *broadcastData = NULL;
|
||||
size_t addrDataLen;
|
||||
|
||||
if (virNetDevGetIPAddressBinary(addr, &addrData, &addrDataLen) < 0)
|
||||
return NULL;
|
||||
|
||||
if (peer && VIR_SOCKET_ADDR_VALID(peer)) {
|
||||
if (virNetDevGetIPAddressBinary(peer, &peerData, &addrDataLen) < 0)
|
||||
return NULL;
|
||||
} else if (broadcast) {
|
||||
if (virNetDevGetIPAddressBinary(broadcast, &broadcastData,
|
||||
&addrDataLen) < 0)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Get the interface index */
|
||||
if ((ifindex = if_nametoindex(ifname)) == 0)
|
||||
return NULL;
|
||||
|
||||
if (!(nlmsg = nlmsg_alloc_simple(messageType,
|
||||
NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL))) {
|
||||
virReportOOMError();
|
||||
return NULL;
|
||||
}
|
||||
|
||||
memset(&ifa, 0, sizeof(ifa));
|
||||
|
||||
ifa.ifa_prefixlen = prefix;
|
||||
ifa.ifa_family = VIR_SOCKET_ADDR_FAMILY(addr);
|
||||
ifa.ifa_index = ifindex;
|
||||
ifa.ifa_scope = 0;
|
||||
|
||||
if (nlmsg_append(nlmsg, &ifa, sizeof(ifa), NLMSG_ALIGNTO) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (nla_put(nlmsg, IFA_LOCAL, addrDataLen, addrData) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (peerData) {
|
||||
if (nla_put(nlmsg, IFA_ADDRESS, addrDataLen, peerData) < 0)
|
||||
goto buffer_too_small;
|
||||
}
|
||||
|
||||
if (broadcastData) {
|
||||
if (nla_put(nlmsg, IFA_BROADCAST, addrDataLen, broadcastData) < 0)
|
||||
goto buffer_too_small;
|
||||
}
|
||||
|
||||
return nlmsg;
|
||||
|
||||
buffer_too_small:
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("allocated netlink buffer is too small"));
|
||||
nlmsg_free(nlmsg);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* virNetDevIPAddrAdd:
|
||||
* @ifname: the interface name
|
||||
* @addr: the IP address (IPv4 or IPv6)
|
||||
* @peer: The IP address of peer (IPv4 or IPv6)
|
||||
* @prefix: number of 1 bits in the netmask
|
||||
*
|
||||
* Add an IP address to an interface. This function *does not* remove
|
||||
* any previously added IP addresses - that must be done separately with
|
||||
* virNetDevIPAddrClear.
|
||||
*
|
||||
* Returns 0 in case of success or -1 in case of error.
|
||||
*/
|
||||
int
|
||||
virNetDevIPAddrAdd(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
virSocketAddr *peer,
|
||||
unsigned int prefix)
|
||||
{
|
||||
virSocketAddr *broadcast = NULL;
|
||||
int ret = -1;
|
||||
struct nl_msg *nlmsg = NULL;
|
||||
struct nlmsghdr *resp = NULL;
|
||||
unsigned int recvbuflen;
|
||||
|
||||
/* The caller needs to provide a correct address */
|
||||
if (VIR_SOCKET_ADDR_FAMILY(addr) == AF_INET &&
|
||||
!(peer && VIR_SOCKET_ADDR_VALID(peer))) {
|
||||
/* compute a broadcast address if this is IPv4 */
|
||||
if (VIR_ALLOC(broadcast) < 0)
|
||||
return -1;
|
||||
|
||||
if (virSocketAddrBroadcastByPrefix(addr, prefix, broadcast) < 0)
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (!(nlmsg = virNetDevCreateNetlinkAddressMessage(RTM_NEWADDR, ifname,
|
||||
addr, prefix,
|
||||
broadcast, peer)))
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
|
||||
NETLINK_ROUTE, 0) < 0)
|
||||
goto cleanup;
|
||||
|
||||
|
||||
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR,
|
||||
_("Error adding IP address to %s"), ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
nlmsg_free(nlmsg);
|
||||
VIR_FREE(resp);
|
||||
VIR_FREE(broadcast);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* virNetDevIPAddrDel:
|
||||
* @ifname: the interface name
|
||||
* @addr: the IP address (IPv4 or IPv6)
|
||||
* @prefix: number of 1 bits in the netmask
|
||||
*
|
||||
* Delete an IP address from an interface.
|
||||
*
|
||||
* Returns 0 in case of success or -1 in case of error.
|
||||
*/
|
||||
int
|
||||
virNetDevIPAddrDel(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
unsigned int prefix)
|
||||
{
|
||||
int ret = -1;
|
||||
struct nl_msg *nlmsg = NULL;
|
||||
struct nlmsghdr *resp = NULL;
|
||||
unsigned int recvbuflen;
|
||||
|
||||
if (!(nlmsg = virNetDevCreateNetlinkAddressMessage(RTM_DELADDR, ifname,
|
||||
addr, prefix,
|
||||
NULL, NULL)))
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
|
||||
NETLINK_ROUTE, 0) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR,
|
||||
_("Error removing IP address from %s"), ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
nlmsg_free(nlmsg);
|
||||
VIR_FREE(resp);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* virNetDevIPRouteAdd:
|
||||
* @ifname: the interface name
|
||||
* @addr: the IP network address (IPv4 or IPv6)
|
||||
* @prefix: number of 1 bits in the netmask
|
||||
* @gateway: via address for route (same as @addr)
|
||||
*
|
||||
* Add a route for a network IP address to an interface. This function
|
||||
* *does not* remove any previously added IP static routes.
|
||||
*
|
||||
* Returns 0 in case of success or -1 in case of error.
|
||||
*/
|
||||
int
|
||||
virNetDevIPRouteAdd(const char *ifname,
|
||||
virSocketAddrPtr addr,
|
||||
unsigned int prefix,
|
||||
virSocketAddrPtr gateway,
|
||||
unsigned int metric)
|
||||
{
|
||||
int ret = -1;
|
||||
struct nl_msg *nlmsg = NULL;
|
||||
struct nlmsghdr *resp = NULL;
|
||||
unsigned int recvbuflen;
|
||||
unsigned int ifindex;
|
||||
struct rtmsg rtmsg;
|
||||
void *gatewayData = NULL;
|
||||
void *addrData = NULL;
|
||||
size_t addrDataLen;
|
||||
int errCode;
|
||||
virSocketAddr defaultAddr;
|
||||
virSocketAddrPtr actualAddr;
|
||||
char *toStr = NULL;
|
||||
char *viaStr = NULL;
|
||||
|
||||
actualAddr = addr;
|
||||
|
||||
/* If we have no valid network address, then use the default one */
|
||||
if (!addr || !VIR_SOCKET_ADDR_VALID(addr)) {
|
||||
VIR_DEBUG("computing default address");
|
||||
int family = VIR_SOCKET_ADDR_FAMILY(gateway);
|
||||
if (family == AF_INET) {
|
||||
if (virSocketAddrParseIPv4(&defaultAddr, VIR_SOCKET_ADDR_IPV4_ALL) < 0)
|
||||
goto cleanup;
|
||||
} else {
|
||||
if (virSocketAddrParseIPv6(&defaultAddr, VIR_SOCKET_ADDR_IPV6_ALL) < 0)
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
actualAddr = &defaultAddr;
|
||||
}
|
||||
|
||||
toStr = virSocketAddrFormat(actualAddr);
|
||||
viaStr = virSocketAddrFormat(gateway);
|
||||
VIR_DEBUG("Adding route %s/%d via %s", toStr, prefix, viaStr);
|
||||
|
||||
if (virNetDevGetIPAddressBinary(actualAddr, &addrData, &addrDataLen) < 0 ||
|
||||
virNetDevGetIPAddressBinary(gateway, &gatewayData, &addrDataLen) < 0)
|
||||
goto cleanup;
|
||||
|
||||
/* Get the interface index */
|
||||
if ((ifindex = if_nametoindex(ifname)) == 0)
|
||||
goto cleanup;
|
||||
|
||||
if (!(nlmsg = nlmsg_alloc_simple(RTM_NEWROUTE,
|
||||
NLM_F_REQUEST | NLM_F_CREATE |
|
||||
NLM_F_EXCL))) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
memset(&rtmsg, 0, sizeof(rtmsg));
|
||||
|
||||
rtmsg.rtm_family = VIR_SOCKET_ADDR_FAMILY(gateway);
|
||||
rtmsg.rtm_table = RT_TABLE_MAIN;
|
||||
rtmsg.rtm_scope = RT_SCOPE_UNIVERSE;
|
||||
rtmsg.rtm_protocol = RTPROT_BOOT;
|
||||
rtmsg.rtm_type = RTN_UNICAST;
|
||||
rtmsg.rtm_dst_len = prefix;
|
||||
|
||||
if (nlmsg_append(nlmsg, &rtmsg, sizeof(rtmsg), NLMSG_ALIGNTO) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (prefix > 0 && nla_put(nlmsg, RTA_DST, addrDataLen, addrData) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (nla_put(nlmsg, RTA_GATEWAY, addrDataLen, gatewayData) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (nla_put_u32(nlmsg, RTA_OIF, ifindex) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (metric > 0 && nla_put_u32(nlmsg, RTA_PRIORITY, metric) < 0)
|
||||
goto buffer_too_small;
|
||||
|
||||
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
|
||||
NETLINK_ROUTE, 0) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if ((errCode = virNetlinkGetErrorCode(resp, recvbuflen)) < 0) {
|
||||
virReportSystemError(errCode, _("Error adding route to %s"), ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(toStr);
|
||||
VIR_FREE(viaStr);
|
||||
nlmsg_free(nlmsg);
|
||||
return ret;
|
||||
|
||||
buffer_too_small:
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("allocated netlink buffer is too small"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
|
||||
/* return true if there is a known address with 'tentative' flag set */
|
||||
static bool
|
||||
virNetDevIPParseDadStatus(struct nlmsghdr *nlh, int len,
|
||||
virSocketAddrPtr *addrs, size_t count)
|
||||
{
|
||||
struct ifaddrmsg *ifaddrmsg_ptr;
|
||||
unsigned int ifaddrmsg_len;
|
||||
struct rtattr *rtattr_ptr;
|
||||
size_t i;
|
||||
struct in6_addr *addr;
|
||||
|
||||
VIR_WARNINGS_NO_CAST_ALIGN
|
||||
for (; NLMSG_OK(nlh, len); nlh = NLMSG_NEXT(nlh, len)) {
|
||||
VIR_WARNINGS_RESET
|
||||
if (NLMSG_PAYLOAD(nlh, 0) < sizeof(struct ifaddrmsg)) {
|
||||
/* Message without payload is the last one. */
|
||||
break;
|
||||
}
|
||||
|
||||
ifaddrmsg_ptr = (struct ifaddrmsg *)NLMSG_DATA(nlh);
|
||||
if (!(ifaddrmsg_ptr->ifa_flags & IFA_F_TENTATIVE)) {
|
||||
/* Not tentative: we are not interested in this entry. */
|
||||
continue;
|
||||
}
|
||||
|
||||
ifaddrmsg_len = IFA_PAYLOAD(nlh);
|
||||
VIR_WARNINGS_NO_CAST_ALIGN
|
||||
rtattr_ptr = (struct rtattr *) IFA_RTA(ifaddrmsg_ptr);
|
||||
for (; RTA_OK(rtattr_ptr, ifaddrmsg_len);
|
||||
rtattr_ptr = RTA_NEXT(rtattr_ptr, ifaddrmsg_len)) {
|
||||
VIR_WARNINGS_RESET
|
||||
if (RTA_PAYLOAD(rtattr_ptr) != sizeof(struct in6_addr)) {
|
||||
/* No address: ignore. */
|
||||
continue;
|
||||
}
|
||||
|
||||
/* We check only known addresses. */
|
||||
for (i = 0; i < count; i++) {
|
||||
addr = &addrs[i]->data.inet6.sin6_addr;
|
||||
if (!memcmp(addr, RTA_DATA(rtattr_ptr),
|
||||
sizeof(struct in6_addr))) {
|
||||
/* We found matching tentative address. */
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
/* return after DAD finishes for all known IPv6 addresses or an error */
|
||||
int
|
||||
virNetDevIPWaitDadFinish(virSocketAddrPtr *addrs, size_t count)
|
||||
{
|
||||
struct nl_msg *nlmsg = NULL;
|
||||
struct ifaddrmsg ifa;
|
||||
struct nlmsghdr *resp = NULL;
|
||||
unsigned int recvbuflen;
|
||||
int ret = -1;
|
||||
bool dad = true;
|
||||
time_t max_time = time(NULL) + VIR_DAD_WAIT_TIMEOUT;
|
||||
|
||||
if (!(nlmsg = nlmsg_alloc_simple(RTM_GETADDR,
|
||||
NLM_F_REQUEST | NLM_F_DUMP))) {
|
||||
virReportOOMError();
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&ifa, 0, sizeof(ifa));
|
||||
/* DAD is for IPv6 adresses only. */
|
||||
ifa.ifa_family = AF_INET6;
|
||||
if (nlmsg_append(nlmsg, &ifa, sizeof(ifa), NLMSG_ALIGNTO) < 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("allocated netlink buffer is too small"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
/* Periodically query netlink until DAD finishes on all known addresses. */
|
||||
while (dad && time(NULL) < max_time) {
|
||||
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
|
||||
NETLINK_ROUTE, 0) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR, "%s",
|
||||
_("error reading DAD state information"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
/* Parse response. */
|
||||
dad = virNetDevIPParseDadStatus(resp, recvbuflen, addrs, count);
|
||||
if (dad)
|
||||
usleep(1000 * 10);
|
||||
|
||||
VIR_FREE(resp);
|
||||
}
|
||||
/* Check timeout. */
|
||||
if (dad) {
|
||||
virReportError(VIR_ERR_SYSTEM_ERROR,
|
||||
_("Duplicate Address Detection "
|
||||
"not finished in %d seconds"), VIR_DAD_WAIT_TIMEOUT);
|
||||
} else {
|
||||
ret = 0;
|
||||
}
|
||||
|
||||
cleanup:
|
||||
VIR_FREE(resp);
|
||||
nlmsg_free(nlmsg);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
#else /* defined(__linux__) && defined(HAVE_LIBNL) */
|
||||
|
||||
|
||||
int
|
||||
virNetDevIPAddrAdd(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
virSocketAddr *peer,
|
||||
unsigned int prefix)
|
||||
{
|
||||
virCommandPtr cmd = NULL;
|
||||
char *addrstr = NULL, *bcaststr = NULL, *peerstr = NULL;
|
||||
virSocketAddr broadcast;
|
||||
int ret = -1;
|
||||
|
||||
if (!(addrstr = virSocketAddrFormat(addr)))
|
||||
goto cleanup;
|
||||
|
||||
if (peer && VIR_SOCKET_ADDR_VALID(peer) && !(peerstr = virSocketAddrFormat(peer)))
|
||||
goto cleanup;
|
||||
|
||||
/* format up a broadcast address if this is IPv4 */
|
||||
if (!peerstr && ((VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET)) &&
|
||||
((virSocketAddrBroadcastByPrefix(addr, prefix, &broadcast) < 0) ||
|
||||
!(bcaststr = virSocketAddrFormat(&broadcast))))) {
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
# ifdef IFCONFIG_PATH
|
||||
cmd = virCommandNew(IFCONFIG_PATH);
|
||||
virCommandAddArg(cmd, ifname);
|
||||
if (VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET6))
|
||||
virCommandAddArg(cmd, "inet6");
|
||||
else
|
||||
virCommandAddArg(cmd, "inet");
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
if (peerstr)
|
||||
virCommandAddArgList(cmd, "pointopoint", peerstr, NULL);
|
||||
if (bcaststr)
|
||||
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
|
||||
virCommandAddArg(cmd, "alias");
|
||||
# else
|
||||
cmd = virCommandNew(IP_PATH);
|
||||
virCommandAddArgList(cmd, "addr", "add", NULL);
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
if (peerstr)
|
||||
virCommandAddArgList(cmd, "peer", peerstr, NULL);
|
||||
if (bcaststr)
|
||||
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
|
||||
virCommandAddArgList(cmd, "dev", ifname, NULL);
|
||||
# endif
|
||||
|
||||
if (virCommandRun(cmd, NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(addrstr);
|
||||
VIR_FREE(bcaststr);
|
||||
VIR_FREE(peerstr);
|
||||
virCommandFree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
virNetDevIPAddrDel(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
unsigned int prefix)
|
||||
{
|
||||
virCommandPtr cmd = NULL;
|
||||
char *addrstr;
|
||||
int ret = -1;
|
||||
|
||||
if (!(addrstr = virSocketAddrFormat(addr)))
|
||||
goto cleanup;
|
||||
# ifdef IFCONFIG_PATH
|
||||
cmd = virCommandNew(IFCONFIG_PATH);
|
||||
virCommandAddArg(cmd, ifname);
|
||||
if (VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET6))
|
||||
virCommandAddArg(cmd, "inet6");
|
||||
else
|
||||
virCommandAddArg(cmd, "inet");
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
virCommandAddArg(cmd, "-alias");
|
||||
# else
|
||||
cmd = virCommandNew(IP_PATH);
|
||||
virCommandAddArgList(cmd, "addr", "del", NULL);
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
virCommandAddArgList(cmd, "dev", ifname, NULL);
|
||||
# endif
|
||||
|
||||
if (virCommandRun(cmd, NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(addrstr);
|
||||
virCommandFree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
virNetDevIPRouteAdd(const char *ifname,
|
||||
virSocketAddrPtr addr,
|
||||
unsigned int prefix,
|
||||
virSocketAddrPtr gateway,
|
||||
unsigned int metric)
|
||||
{
|
||||
virCommandPtr cmd = NULL;
|
||||
char *addrstr = NULL, *gatewaystr = NULL;
|
||||
int ret = -1;
|
||||
|
||||
if (!(addrstr = virSocketAddrFormat(addr)))
|
||||
goto cleanup;
|
||||
if (!(gatewaystr = virSocketAddrFormat(gateway)))
|
||||
goto cleanup;
|
||||
cmd = virCommandNew(IP_PATH);
|
||||
virCommandAddArgList(cmd, "route", "add", NULL);
|
||||
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
|
||||
virCommandAddArgList(cmd, "via", gatewaystr, "dev", ifname,
|
||||
"proto", "static", "metric", NULL);
|
||||
virCommandAddArgFormat(cmd, "%u", metric);
|
||||
|
||||
if (virCommandRun(cmd, NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FREE(addrstr);
|
||||
VIR_FREE(gatewaystr);
|
||||
virCommandFree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/* return after DAD finishes for all known IPv6 addresses or an error */
|
||||
int
|
||||
virNetDevWaitDadFinish(virSocketAddrPtr *addrs ATTRIBUTE_UNUSED,
|
||||
size_t count ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to wait for IPv6 DAD on this platform"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
#endif /* defined(__linux__) && defined(HAVE_LIBNL) */
|
||||
|
||||
|
||||
/**
|
||||
* virNetDevGetIPv4AddressIoctl:
|
||||
* @ifname: name of the interface whose IP address we want
|
||||
* @addr: filled with the IPv4 address
|
||||
*
|
||||
* This function gets the IPv4 address for the interface @ifname
|
||||
* and stores it in @addr
|
||||
*
|
||||
* Returns 0 on success, -errno on failure.
|
||||
*/
|
||||
#if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ)
|
||||
static int
|
||||
virNetDevGetIPv4AddressIoctl(const char *ifname,
|
||||
virSocketAddrPtr addr)
|
||||
{
|
||||
int fd = -1;
|
||||
int ret = -1;
|
||||
struct ifreq ifr;
|
||||
|
||||
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
|
||||
return -1;
|
||||
|
||||
if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Unable to get IPv4 address for interface %s via ioctl"),
|
||||
ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
addr->data.stor.ss_family = AF_INET;
|
||||
addr->len = sizeof(addr->data.inet4);
|
||||
memcpy(&addr->data.inet4, &ifr.ifr_addr, addr->len);
|
||||
ret = 0;
|
||||
|
||||
cleanup:
|
||||
VIR_FORCE_CLOSE(fd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#else /* ! SIOCGIFADDR */
|
||||
|
||||
static int
|
||||
virNetDevGetIPv4AddressIoctl(const char *ifname ATTRIBUTE_UNUSED,
|
||||
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
|
||||
{
|
||||
return -2;
|
||||
}
|
||||
|
||||
#endif /* ! SIOCGIFADDR */
|
||||
|
||||
/**
|
||||
* virNetDevGetifaddrsAddress:
|
||||
* @ifname: name of the interface whose IP address we want
|
||||
* @addr: filled with the IP address
|
||||
*
|
||||
* This function gets the IP address for the interface @ifname
|
||||
* and stores it in @addr
|
||||
*
|
||||
* Returns 0 on success, -1 on failure, -2 on unsupported.
|
||||
*/
|
||||
#if HAVE_GETIFADDRS
|
||||
static int
|
||||
virNetDevGetifaddrsAddress(const char *ifname,
|
||||
virSocketAddrPtr addr)
|
||||
{
|
||||
struct ifaddrs *ifap, *ifa;
|
||||
int ret = -1;
|
||||
|
||||
if (getifaddrs(&ifap) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Could not get interface list for '%s'"),
|
||||
ifname);
|
||||
return -1;
|
||||
}
|
||||
|
||||
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
|
||||
int family = ifa->ifa_addr->sa_family;
|
||||
|
||||
if (STRNEQ_NULLABLE(ifa->ifa_name, ifname))
|
||||
continue;
|
||||
if (family != AF_INET6 && family != AF_INET)
|
||||
continue;
|
||||
|
||||
if (family == AF_INET6) {
|
||||
addr->len = sizeof(addr->data.inet6);
|
||||
memcpy(&addr->data.inet6, ifa->ifa_addr, addr->len);
|
||||
} else {
|
||||
addr->len = sizeof(addr->data.inet4);
|
||||
memcpy(&addr->data.inet4, ifa->ifa_addr, addr->len);
|
||||
}
|
||||
addr->data.stor.ss_family = family;
|
||||
ret = 0;
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR,
|
||||
_("no IP address found for interface '%s'"),
|
||||
ifname);
|
||||
cleanup:
|
||||
freeifaddrs(ifap);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#else /* ! HAVE_GETIFADDRS */
|
||||
|
||||
static int
|
||||
virNetDevGetifaddrsAddress(const char *ifname ATTRIBUTE_UNUSED,
|
||||
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
|
||||
{
|
||||
return -2;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/**
|
||||
* virNetDevIPIPAddrGet:
|
||||
* @ifname: name of the interface whose IP address we want
|
||||
* @addr: filled with the IPv4 address
|
||||
*
|
||||
* This function gets the IPv4 address for the interface @ifname
|
||||
* and stores it in @addr
|
||||
*
|
||||
* Returns 0 on success, -errno on failure.
|
||||
*/
|
||||
int
|
||||
virNetDevIPAddrGet(const char *ifname,
|
||||
virSocketAddrPtr addr)
|
||||
{
|
||||
int ret;
|
||||
|
||||
memset(addr, 0, sizeof(*addr));
|
||||
addr->data.stor.ss_family = AF_UNSPEC;
|
||||
|
||||
if ((ret = virNetDevGetifaddrsAddress(ifname, addr)) != -2)
|
||||
return ret;
|
||||
|
||||
if ((ret = virNetDevGetIPv4AddressIoctl(ifname, addr)) != -2)
|
||||
return ret;
|
||||
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to get IP address on this platform"));
|
||||
return -1;
|
||||
}
|
||||
50
src/util/virnetdevip.h
Normal file
50
src/util/virnetdevip.h
Normal file
@ -0,0 +1,50 @@
|
||||
/*
|
||||
* Copyright (C) 2007-2016 Red Hat, Inc.
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library. If not, see
|
||||
* <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* Authors:
|
||||
* Mark McLoughlin <markmc@redhat.com>
|
||||
* Daniel P. Berrange <berrange@redhat.com>
|
||||
*/
|
||||
|
||||
#ifndef __VIR_NETDEVIP_H__
|
||||
# define __VIR_NETDEVIP_H__
|
||||
|
||||
# include "virsocketaddr.h"
|
||||
|
||||
/* manipulating/querying the netdev */
|
||||
int virNetDevIPAddrAdd(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
virSocketAddr *peer,
|
||||
unsigned int prefix)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
int virNetDevIPRouteAdd(const char *ifname,
|
||||
virSocketAddrPtr addr,
|
||||
unsigned int prefix,
|
||||
virSocketAddrPtr gateway,
|
||||
unsigned int metric)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(4)
|
||||
ATTRIBUTE_RETURN_CHECK;
|
||||
int virNetDevIPAddrDel(const char *ifname,
|
||||
virSocketAddr *addr,
|
||||
unsigned int prefix)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
int virNetDevIPAddrGet(const char *ifname, virSocketAddrPtr addr)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
int virNetDevIPWaitDadFinish(virSocketAddrPtr *addrs, size_t count)
|
||||
ATTRIBUTE_NONNULL(1);
|
||||
|
||||
#endif /* __VIR_NETDEVIP_H__ */
|
||||
Loading…
Reference in New Issue
Block a user