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Dependents: TYBLE16_simple_data_logger TYBLE16_MP3_Air
pana_relay_table.c
00001 /* 00002 * Copyright (c) 2013-2017, Arm Limited and affiliates. 00003 * SPDX-License-Identifier: Apache-2.0 00004 * 00005 * Licensed under the Apache License, Version 2.0 (the "License"); 00006 * you may not use this file except in compliance with the License. 00007 * You may obtain a copy of the License at 00008 * 00009 * http://www.apache.org/licenses/LICENSE-2.0 00010 * 00011 * Unless required by applicable law or agreed to in writing, software 00012 * distributed under the License is distributed on an "AS IS" BASIS, 00013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00014 * See the License for the specific language governing permissions and 00015 * limitations under the License. 00016 */ 00017 #include "nsconfig.h" 00018 #include "ns_types.h" 00019 #include "string.h" 00020 #include "Security/PANA/pana_relay_table.h" 00021 #include "nsdynmemLIB.h" 00022 00023 #ifdef PANA 00024 00025 static NS_LARGE relay_table_entry_t *relay_first_info = 0; 00026 00027 00028 void pana_relay_table_init(void) 00029 { 00030 /* Init Double linked Routing Table */ 00031 00032 if (relay_first_info) { 00033 relay_table_entry_t *cur = 0; 00034 while (relay_first_info) { 00035 cur = relay_first_info; 00036 relay_first_info = cur->next_info; 00037 ns_dyn_mem_free(cur); 00038 } 00039 } 00040 } 00041 00042 00043 relay_table_entry_t *pana_relay_table_update(uint8_t *address) 00044 { 00045 relay_table_entry_t *ret_val = 0; 00046 00047 relay_table_entry_t *cur = 0; 00048 if (relay_first_info) { 00049 cur = relay_first_info; 00050 while (cur) { 00051 00052 if (memcmp((uint8_t *)cur->relay_address, (uint8_t *) address, 16) == 0) { 00053 /* General Update part */ 00054 cur->ttl = 20; 00055 ret_val = cur; 00056 break; 00057 } 00058 if (cur->next_info) { 00059 cur = cur->next_info; 00060 } else { 00061 break; 00062 } 00063 } 00064 } 00065 00066 //allocate new 00067 if (ret_val == 0) { 00068 ret_val = (relay_table_entry_t *) ns_dyn_mem_alloc(sizeof(relay_table_entry_t)); 00069 if (ret_val) { 00070 if (cur != 0) { 00071 cur->next_info = ret_val; 00072 ret_val->prev_info = cur; 00073 } else { 00074 ret_val->prev_info = 0; 00075 } 00076 ret_val->next_info = 0; 00077 /* Copy Adrress IPv6 Address */ 00078 memcpy((uint8_t *)ret_val->relay_address, address, 16); 00079 ret_val->ttl = 20; 00080 if (relay_first_info == 0) { 00081 relay_first_info = ret_val; 00082 } 00083 } 00084 } 00085 return ret_val; 00086 } 00087 00088 relay_table_entry_t *pana_relay_detect(uint8_t *address) 00089 { 00090 relay_table_entry_t *cur = 0; 00091 if (relay_first_info) { 00092 cur = relay_first_info; 00093 while (cur) { 00094 if (memcmp((uint8_t *)cur->relay_address, (uint8_t *) address, 16) == 0) { 00095 /* General Update part */ 00096 return cur; 00097 } 00098 cur = cur->next_info; 00099 } 00100 } 00101 return 0; 00102 } 00103 00104 00105 void pana_relay_ttl_update(uint16_t ttl_time) 00106 { 00107 relay_table_entry_t *cur = 0; 00108 if (relay_first_info) { 00109 relay_table_entry_t *prev = 0; 00110 relay_table_entry_t *next = 0; 00111 cur = relay_first_info; 00112 while (cur) { 00113 if (cur->ttl < ttl_time) { 00114 cur->ttl -= ttl_time; 00115 cur = cur->next_info; 00116 } else { 00117 prev = cur->prev_info; 00118 next = cur->next_info; 00119 if (prev) { //Not First 00120 00121 if (next) { //Not Last 00122 prev->next_info = next; 00123 next->prev_info = prev; //Link next to new prev 00124 } else { //Last One 00125 prev->next_info = 0;/* New last entry */ 00126 } 00127 00128 } else { //FIRST 00129 if (next == 0) { /* Last entry */ 00130 relay_first_info = 0; //Reset Route table 00131 } else { //New First 00132 relay_first_info = next; // Setup new First 00133 next->prev_info = 0; 00134 } 00135 } 00136 ns_dyn_mem_free(cur); 00137 cur = next; 00138 } 00139 00140 } 00141 } 00142 } 00143 #endif
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