Add Windows implementation of guest-network-get-route command to provide network routing information on Windows guests.
Features implemented: - IPv4 and IPv6 route information retrieval using GetIpForwardTable2 - Human-readable interface names via GetAdaptersAddresses - Proper route metrics combining route and interface metrics - MTU information for network interfaces - Support for destination, gateway, mask, and metric fields for IPv4 - Support for destination, nexthop, and desprefixlen fields for IPv6 Implementation uses modern Windows IP Helper API (GetIpForwardTable2, GetIfEntry2). Signed-off-by: Elizabeth Ashurov <[email protected]> --- qga/commands-win32.c | 172 +++++++++++++++++++++++++++++++++++++++++++ qga/qapi-schema.json | 11 +-- 2 files changed, 178 insertions(+), 5 deletions(-) diff --git a/qga/commands-win32.c b/qga/commands-win32.c index acc2c11589..577e00dc65 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -2592,3 +2592,175 @@ GuestLoadAverage *qmp_guest_get_load(Error **errp) ret->load15m = load_avg_15m; return ret; } + +/* Helper function to get interface name with fallbacks */ +static char *get_interface_name(const MIB_IPFORWARD_ROW2 *row, + IP_ADAPTER_ADDRESSES *adptr_addrs) +{ + IP_ADAPTER_ADDRESSES *adapter; + char *iface_name = NULL; + + if (adptr_addrs) { + for (adapter = adptr_addrs; adapter; adapter = adapter->Next) { + if (adapter->Luid.Value == row->InterfaceLuid.Value) { + iface_name = guest_wctomb_dup(adapter->FriendlyName); + break; + } + } + } + + if (!iface_name) { + iface_name = g_strdup_printf("if%lu", row->InterfaceIndex); + } + + return iface_name; +} + +/* Helper function to fill IPv4 route information */ +static void fill_ipv4_route_info(GuestNetworkRoute *route, + const MIB_IPFORWARD_ROW2 *row) +{ + struct sockaddr_in *addr_in; + char addr_str[INET_ADDRSTRLEN]; + + addr_in = (struct sockaddr_in *)&row->DestinationPrefix.Prefix; + if (inet_ntop(AF_INET, &addr_in->sin_addr, addr_str, INET_ADDRSTRLEN)) { + route->destination = g_strdup(addr_str); + } else { + route->destination = g_strdup("0.0.0.0"); + } + + if (row->DestinationPrefix.PrefixLength == 0) { + route->mask = g_strdup("0.0.0.0"); + } else { + uint32_t mask = htonl(0xFFFFFFFF << (32 - + row->DestinationPrefix.PrefixLength)); + struct in_addr mask_addr = { .s_addr = mask }; + route->mask = g_strdup(inet_ntoa(mask_addr)); + } + + addr_in = (struct sockaddr_in *)&row->NextHop; + if (inet_ntop(AF_INET, &addr_in->sin_addr, addr_str, INET_ADDRSTRLEN)) { + route->gateway = g_strdup(addr_str); + } else { + route->gateway = g_strdup("0.0.0.0"); + } + + route->version = 4; +} + +/* Helper function to fill IPv6 route information */ +static void fill_ipv6_route_info(GuestNetworkRoute *route, + const MIB_IPFORWARD_ROW2 *row) +{ + struct sockaddr_in6 *addr_in6; + char addr_str[INET6_ADDRSTRLEN]; + + addr_in6 = (struct sockaddr_in6 *)&row->DestinationPrefix.Prefix; + if (inet_ntop(AF_INET6, &addr_in6->sin6_addr, addr_str, INET6_ADDRSTRLEN)) { + route->destination = g_strdup(addr_str); + } else { + route->destination = g_strdup("::"); + } + + addr_in6 = (struct sockaddr_in6 *)&row->NextHop; + if (inet_ntop(AF_INET6, &addr_in6->sin6_addr, addr_str, INET6_ADDRSTRLEN)) { + route->nexthop = g_strdup(addr_str); + } else { + route->nexthop = g_strdup("::"); + } + + route->desprefixlen = g_strdup_printf("%u", + row->DestinationPrefix.PrefixLength); + route->version = 6; +} + +GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) +{ + GuestNetworkRouteList *head = NULL, **tail = &head; + PMIB_IPFORWARD_TABLE2 pIpForwardTable2; + DWORD dwRetVal = 0; + DWORD i; + PMIB_IPFORWARD_ROW2 row; + GuestNetworkRoute *route; + IP_ADAPTER_ADDRESSES *adptr_addrs; + MIB_IPINTERFACE_ROW ipifrow; + MIB_IF_ROW2 ifrow2; + Error *local_err = NULL; + GHashTable *interface_metric_cache; + + dwRetVal = GetIpForwardTable2(AF_UNSPEC, &pIpForwardTable2); + if (dwRetVal != NO_ERROR) { + error_setg_win32(errp, dwRetVal, "failed to get IP routes"); + return NULL; + } + + interface_metric_cache = g_hash_table_new_full(g_str_hash, g_str_equal, + g_free, NULL); + adptr_addrs = guest_get_adapters_addresses(&local_err); + if (local_err) { + error_free(local_err); + adptr_addrs = NULL; + } + + for (i = 0; i < pIpForwardTable2->NumEntries; i++) { + row = &pIpForwardTable2->Table[i]; + + if (row->DestinationPrefix.Prefix.si_family == AF_INET) { + route = g_new0(GuestNetworkRoute, 1); + fill_ipv4_route_info(route, row); + } else if (row->DestinationPrefix.Prefix.si_family == AF_INET6) { + route = g_new0(GuestNetworkRoute, 1); + fill_ipv6_route_info(route, row); + } else { + continue; + } + + route->iface = get_interface_name(row, adptr_addrs); + + /* + * Get interface metric for combined route metric calculation. + * Windows calculates effective route metric as route + interface metric. + * This matches the values displayed by Windows 'route print' command. + * See: + * https://learn.microsoft.com/en-us/windows/win32/api/netioapi/ns-netioapi-mib_ipforward_row2 + */ + gchar *luid_key = g_strdup_printf("%" G_GUINT64_FORMAT, + row->InterfaceLuid.Value); + gpointer cached_metric = g_hash_table_lookup(interface_metric_cache, + luid_key); + + if (cached_metric) { + route->metric = (int)row->Metric + GPOINTER_TO_INT(cached_metric); + g_free(luid_key); + } else { + memset(&ipifrow, 0, sizeof(ipifrow)); + InitializeIpInterfaceEntry(&ipifrow); + ipifrow.InterfaceLuid = row->InterfaceLuid; + ipifrow.Family = row->DestinationPrefix.Prefix.si_family; + if (GetIpInterfaceEntry(&ipifrow) == NO_ERROR) { + g_hash_table_insert(interface_metric_cache, luid_key, + GINT_TO_POINTER(ipifrow.Metric)); + route->metric = (int)row->Metric + (int)ipifrow.Metric; + } else { + route->metric = (int)row->Metric; + g_free(luid_key); + } + } + + memset(&ifrow2, 0, sizeof(ifrow2)); + ifrow2.InterfaceLuid = row->InterfaceLuid; + if (GetIfEntry2(&ifrow2) == NO_ERROR) { + route->has_mtu = true; + route->mtu = (int)ifrow2.Mtu; + } + + QAPI_LIST_APPEND(tail, route); + route = NULL; + } + + FreeMibTable(pIpForwardTable2); + g_free(adptr_addrs); + g_hash_table_destroy(interface_metric_cache); + return head; +} diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json index 5791b49dde..89ea5485cc 100644 --- a/qga/qapi-schema.json +++ b/qga/qapi-schema.json @@ -1879,7 +1879,8 @@ ## # @GuestNetworkRoute: # -# Route information, currently, only linux supported. +# Route information. Supported on Linux (since 9.1) and Windows +# (since 10.3). # # @iface: The destination network or host's egress network interface # in the routing table @@ -1916,7 +1917,7 @@ # # @version: IP version (4 or 6) # -# Since: 9.1 +# Since: 9.1 (Linux only); 10.3 (Windows) ## { 'struct': 'GuestNetworkRoute', 'data': {'iface': 'str', @@ -1936,7 +1937,7 @@ '*nexthop': 'str', 'version': 'int' }, - 'if': 'CONFIG_LINUX' } + 'if': { 'any': ['CONFIG_LINUX', 'CONFIG_WIN32'] } } ## # @guest-network-get-route: @@ -1945,9 +1946,9 @@ # # Returns: List of route info of guest. # -# Since: 9.1 +# Since: 9.1 (Linux only); 10.3 (Windows) ## { 'command': 'guest-network-get-route', 'returns': ['GuestNetworkRoute'], - 'if': 'CONFIG_LINUX' + 'if': { 'any': ['CONFIG_LINUX', 'CONFIG_WIN32'] } } -- 2.51.0
