1 /* 2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34 #ifndef USNIC_CMN_UTIL_H 35 #define USNIC_CMN_UTIL_H 36 37 static inline void 38 usnic_mac_to_gid(const char *const mac, char *raw_gid) 39 { 40 raw_gid[0] = 0xfe; 41 raw_gid[1] = 0x80; 42 memset(&raw_gid[2], 0, 6); 43 raw_gid[8] = mac[0]^2; 44 raw_gid[9] = mac[1]; 45 raw_gid[10] = mac[2]; 46 raw_gid[11] = 0xff; 47 raw_gid[12] = 0xfe; 48 raw_gid[13] = mac[3]; 49 raw_gid[14] = mac[4]; 50 raw_gid[15] = mac[5]; 51 } 52 53 static inline void 54 usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid) 55 { 56 raw_gid[0] = 0xfe; 57 raw_gid[1] = 0x80; 58 memset(&raw_gid[2], 0, 2); 59 memcpy(&raw_gid[4], &inaddr, 4); 60 raw_gid[8] = mac[0]^2; 61 raw_gid[9] = mac[1]; 62 raw_gid[10] = mac[2]; 63 raw_gid[11] = 0xff; 64 raw_gid[12] = 0xfe; 65 raw_gid[13] = mac[3]; 66 raw_gid[14] = mac[4]; 67 raw_gid[15] = mac[5]; 68 } 69 70 static inline void 71 usnic_write_gid_if_id_from_mac(char *mac, char *raw_gid) 72 { 73 raw_gid[8] = mac[0]^2; 74 raw_gid[9] = mac[1]; 75 raw_gid[10] = mac[2]; 76 raw_gid[11] = 0xff; 77 raw_gid[12] = 0xfe; 78 raw_gid[13] = mac[3]; 79 raw_gid[14] = mac[4]; 80 raw_gid[15] = mac[5]; 81 } 82 83 #endif /* USNIC_COMMON_UTIL_H */ 84