diff options
Diffstat (limited to 'common/device/com/android/net/module/util/netlink/NetlinkConstants.java')
| -rw-r--r-- | common/device/com/android/net/module/util/netlink/NetlinkConstants.java | 283 |
1 files changed, 0 insertions, 283 deletions
diff --git a/common/device/com/android/net/module/util/netlink/NetlinkConstants.java b/common/device/com/android/net/module/util/netlink/NetlinkConstants.java deleted file mode 100644 index 44c51d8a..00000000 --- a/common/device/com/android/net/module/util/netlink/NetlinkConstants.java +++ /dev/null @@ -1,283 +0,0 @@ -/* - * Copyright (C) 2015 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.android.net.module.util.netlink; - -import android.system.OsConstants; - -import androidx.annotation.NonNull; - -import java.nio.ByteBuffer; - -/** - * Various constants and static helper methods for netlink communications. - * - * Values taken from: - * - * include/uapi/linux/netfilter/nfnetlink.h - * include/uapi/linux/netfilter/nfnetlink_conntrack.h - * include/uapi/linux/netlink.h - * include/uapi/linux/rtnetlink.h - * - * @hide - */ -public class NetlinkConstants { - private NetlinkConstants() {} - - public static final int NLA_ALIGNTO = 4; - /** - * Flag for dumping struct tcp_info. - * Corresponding to enum definition in external/strace/linux/inet_diag.h. - */ - public static final int INET_DIAG_MEMINFO = 1; - - public static final int SOCKDIAG_MSG_HEADER_SIZE = - StructNlMsgHdr.STRUCT_SIZE + StructInetDiagMsg.STRUCT_SIZE; - - /** - * Get the aligned length based on a Short type number. - */ - public static final int alignedLengthOf(short length) { - final int intLength = (int) length & 0xffff; - return alignedLengthOf(intLength); - } - - /** - * Get the aligned length based on a Integer type number. - */ - public static final int alignedLengthOf(int length) { - if (length <= 0) return 0; - return (((length + NLA_ALIGNTO - 1) / NLA_ALIGNTO) * NLA_ALIGNTO); - } - - /** - * Convert a address family type to a string. - */ - public static String stringForAddressFamily(int family) { - if (family == OsConstants.AF_INET) return "AF_INET"; - if (family == OsConstants.AF_INET6) return "AF_INET6"; - if (family == OsConstants.AF_NETLINK) return "AF_NETLINK"; - if (family == OsConstants.AF_UNSPEC) return "AF_UNSPEC"; - return String.valueOf(family); - } - - /** - * Convert a protocol type to a string. - */ - public static String stringForProtocol(int protocol) { - if (protocol == OsConstants.IPPROTO_TCP) return "IPPROTO_TCP"; - if (protocol == OsConstants.IPPROTO_UDP) return "IPPROTO_UDP"; - return String.valueOf(protocol); - } - - /** - * Convert a byte array to a hexadecimal string. - */ - public static String hexify(byte[] bytes) { - if (bytes == null) return "(null)"; - return toHexString(bytes, 0, bytes.length); - } - - /** - * Convert a {@link ByteBuffer} to a hexadecimal string. - */ - public static String hexify(ByteBuffer buffer) { - if (buffer == null) return "(null)"; - return toHexString( - buffer.array(), buffer.position(), buffer.remaining()); - } - - // Known values for struct nlmsghdr nlm_type. - public static final short NLMSG_NOOP = 1; // Nothing - public static final short NLMSG_ERROR = 2; // Error - public static final short NLMSG_DONE = 3; // End of a dump - public static final short NLMSG_OVERRUN = 4; // Data lost - public static final short NLMSG_MAX_RESERVED = 15; // Max reserved value - - public static final short RTM_NEWLINK = 16; - public static final short RTM_DELLINK = 17; - public static final short RTM_GETLINK = 18; - public static final short RTM_SETLINK = 19; - public static final short RTM_NEWADDR = 20; - public static final short RTM_DELADDR = 21; - public static final short RTM_GETADDR = 22; - public static final short RTM_NEWROUTE = 24; - public static final short RTM_DELROUTE = 25; - public static final short RTM_GETROUTE = 26; - public static final short RTM_NEWNEIGH = 28; - public static final short RTM_DELNEIGH = 29; - public static final short RTM_GETNEIGH = 30; - public static final short RTM_NEWRULE = 32; - public static final short RTM_DELRULE = 33; - public static final short RTM_GETRULE = 34; - public static final short RTM_NEWNDUSEROPT = 68; - - // Netfilter netlink message types are presented by two bytes: high byte subsystem and - // low byte operation. See the macro NFNL_SUBSYS_ID and NFNL_MSG_TYPE in - // include/uapi/linux/netfilter/nfnetlink.h - public static final short NFNL_SUBSYS_CTNETLINK = 1; - - public static final short IPCTNL_MSG_CT_NEW = 0; - public static final short IPCTNL_MSG_CT_GET = 1; - public static final short IPCTNL_MSG_CT_DELETE = 2; - public static final short IPCTNL_MSG_CT_GET_CTRZERO = 3; - public static final short IPCTNL_MSG_CT_GET_STATS_CPU = 4; - public static final short IPCTNL_MSG_CT_GET_STATS = 5; - public static final short IPCTNL_MSG_CT_GET_DYING = 6; - public static final short IPCTNL_MSG_CT_GET_UNCONFIRMED = 7; - - /* see include/uapi/linux/sock_diag.h */ - public static final short SOCK_DIAG_BY_FAMILY = 20; - public static final short SOCK_DESTROY = 21; - - // Netlink groups. - public static final int RTMGRP_LINK = 1; - public static final int RTMGRP_IPV4_IFADDR = 0x10; - public static final int RTMGRP_IPV6_IFADDR = 0x100; - public static final int RTMGRP_IPV6_ROUTE = 0x400; - public static final int RTNLGRP_ND_USEROPT = 20; - public static final int RTMGRP_ND_USEROPT = 1 << (RTNLGRP_ND_USEROPT - 1); - - // Device flags. - public static final int IFF_UP = 1 << 0; - public static final int IFF_LOWER_UP = 1 << 16; - - // Known values for struct rtmsg rtm_protocol. - public static final short RTPROT_KERNEL = 2; - public static final short RTPROT_RA = 9; - - // Known values for struct rtmsg rtm_scope. - public static final short RT_SCOPE_UNIVERSE = 0; - - // Known values for struct rtmsg rtm_type. - public static final short RTN_UNICAST = 1; - - // Known values for struct rtmsg rtm_flags. - public static final int RTM_F_CLONED = 0x200; - - /** - * Convert a netlink message type to a string for control message. - */ - @NonNull - private static String stringForCtlMsgType(short nlmType) { - switch (nlmType) { - case NLMSG_NOOP: return "NLMSG_NOOP"; - case NLMSG_ERROR: return "NLMSG_ERROR"; - case NLMSG_DONE: return "NLMSG_DONE"; - case NLMSG_OVERRUN: return "NLMSG_OVERRUN"; - default: return "unknown control message type: " + String.valueOf(nlmType); - } - } - - /** - * Convert a netlink message type to a string for NETLINK_ROUTE. - */ - @NonNull - private static String stringForRtMsgType(short nlmType) { - switch (nlmType) { - case RTM_NEWLINK: return "RTM_NEWLINK"; - case RTM_DELLINK: return "RTM_DELLINK"; - case RTM_GETLINK: return "RTM_GETLINK"; - case RTM_SETLINK: return "RTM_SETLINK"; - case RTM_NEWADDR: return "RTM_NEWADDR"; - case RTM_DELADDR: return "RTM_DELADDR"; - case RTM_GETADDR: return "RTM_GETADDR"; - case RTM_NEWROUTE: return "RTM_NEWROUTE"; - case RTM_DELROUTE: return "RTM_DELROUTE"; - case RTM_GETROUTE: return "RTM_GETROUTE"; - case RTM_NEWNEIGH: return "RTM_NEWNEIGH"; - case RTM_DELNEIGH: return "RTM_DELNEIGH"; - case RTM_GETNEIGH: return "RTM_GETNEIGH"; - case RTM_NEWRULE: return "RTM_NEWRULE"; - case RTM_DELRULE: return "RTM_DELRULE"; - case RTM_GETRULE: return "RTM_GETRULE"; - case RTM_NEWNDUSEROPT: return "RTM_NEWNDUSEROPT"; - default: return "unknown RTM type: " + String.valueOf(nlmType); - } - } - - /** - * Convert a netlink message type to a string for NETLINK_INET_DIAG. - */ - @NonNull - private static String stringForInetDiagMsgType(short nlmType) { - switch (nlmType) { - case SOCK_DIAG_BY_FAMILY: return "SOCK_DIAG_BY_FAMILY"; - default: return "unknown SOCK_DIAG type: " + String.valueOf(nlmType); - } - } - - /** - * Convert a netlink message type to a string for NETLINK_NETFILTER. - */ - @NonNull - private static String stringForNfMsgType(short nlmType) { - final byte subsysId = (byte) (nlmType >> 8); - final byte msgType = (byte) nlmType; - switch (subsysId) { - case NFNL_SUBSYS_CTNETLINK: - switch (msgType) { - case IPCTNL_MSG_CT_NEW: return "IPCTNL_MSG_CT_NEW"; - case IPCTNL_MSG_CT_GET: return "IPCTNL_MSG_CT_GET"; - case IPCTNL_MSG_CT_DELETE: return "IPCTNL_MSG_CT_DELETE"; - case IPCTNL_MSG_CT_GET_CTRZERO: return "IPCTNL_MSG_CT_GET_CTRZERO"; - case IPCTNL_MSG_CT_GET_STATS_CPU: return "IPCTNL_MSG_CT_GET_STATS_CPU"; - case IPCTNL_MSG_CT_GET_STATS: return "IPCTNL_MSG_CT_GET_STATS"; - case IPCTNL_MSG_CT_GET_DYING: return "IPCTNL_MSG_CT_GET_DYING"; - case IPCTNL_MSG_CT_GET_UNCONFIRMED: return "IPCTNL_MSG_CT_GET_UNCONFIRMED"; - } - break; - } - return "unknown NETFILTER type: " + String.valueOf(nlmType); - } - - /** - * Convert a netlink message type to a string by netlink family. - */ - @NonNull - public static String stringForNlMsgType(short nlmType, int nlFamily) { - // Reserved control messages. The netlink family is ignored. - // See NLMSG_MIN_TYPE in include/uapi/linux/netlink.h. - if (nlmType <= NLMSG_MAX_RESERVED) return stringForCtlMsgType(nlmType); - - // Netlink family messages. The netlink family is required. Note that the reason for using - // if-statement is that switch-case can't be used because the OsConstants.NETLINK_* are - // not constant. - if (nlFamily == OsConstants.NETLINK_ROUTE) return stringForRtMsgType(nlmType); - if (nlFamily == OsConstants.NETLINK_INET_DIAG) return stringForInetDiagMsgType(nlmType); - if (nlFamily == OsConstants.NETLINK_NETFILTER) return stringForNfMsgType(nlmType); - - return "unknown type: " + String.valueOf(nlmType); - } - - private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', - 'A', 'B', 'C', 'D', 'E', 'F' }; - /** - * Convert a byte array to a hexadecimal string. - */ - public static String toHexString(byte[] array, int offset, int length) { - char[] buf = new char[length * 2]; - - int bufIndex = 0; - for (int i = offset; i < offset + length; i++) { - byte b = array[i]; - buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F]; - buf[bufIndex++] = HEX_DIGITS[b & 0x0F]; - } - - return new String(buf); - } -} |