1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 #define NX_SOURCE_CODE 12 13 14 /* Include necessary system files. */ 15 16 #include "nx_api.h" 17 #include "nx_ipv6.h" 18 #include "nx_nd_cache.h" 19 20 21 22 23 #ifdef FEATURE_NX_IPV6 24 /**************************************************************************/ 25 /**************************************************************************/ 26 /** */ 27 /** NetX Component */ 28 /** */ 29 /** Internet Protocol version 6 Prefix Table (IPv6 prefix table) */ 30 /** */ 31 /**************************************************************************/ 32 /**************************************************************************/ 33 34 35 36 37 /**************************************************************************/ 38 /* */ 39 /* FUNCTION RELEASE */ 40 /* */ 41 /* _nx_ipv6_prefix_list_delete PORTABLE C */ 42 /* 6.1 */ 43 /* AUTHOR */ 44 /* */ 45 /* Yuxin Zhou, Microsoft Corporation */ 46 /* */ 47 /* DESCRIPTION */ 48 /* */ 49 /* This internal function deletes an entry from the prefix list based */ 50 /* on the given prefix. */ 51 /* */ 52 /* */ 53 /* INPUT */ 54 /* */ 55 /* ip_ptr Pointer to IP control block */ 56 /* prefix 128-bit IPv6 prefix. */ 57 /* prefix_length Length of the prefix. */ 58 /* */ 59 /* OUTPUT */ 60 /* */ 61 /* None */ 62 /* */ 63 /* CALLS */ 64 /* */ 65 /* _nx_ipv6_prefix_list_delete_entry Delete IPv6 prefix entry */ 66 /* */ 67 /* CALLED BY */ 68 /* */ 69 /* _nx_icmpv6_process_ra ICMPv6 Router Advertisement */ 70 /* process routine. */ 71 /* */ 72 /* NOTE */ 73 /* */ 74 /* This function cannot be called from ISR. */ 75 /* */ 76 /* RELEASE HISTORY */ 77 /* */ 78 /* DATE NAME DESCRIPTION */ 79 /* */ 80 /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */ 81 /* 09-30-2020 Yuxin Zhou Modified comment(s), */ 82 /* resulting in version 6.1 */ 83 /* */ 84 /**************************************************************************/ _nx_ipv6_prefix_list_delete(NX_IP * ip_ptr,ULONG * prefix,INT prefix_length)85VOID _nx_ipv6_prefix_list_delete(NX_IP *ip_ptr, ULONG *prefix, INT prefix_length) 86 { 87 88 NX_IPV6_PREFIX_ENTRY *current; 89 90 91 /* Quick reference to the head of the prefix list. */ 92 current = ip_ptr -> nx_ipv6_prefix_list_ptr; 93 94 /* Go through all the entries. */ 95 while (current) 96 { 97 98 /* If prefix length matches, and the prefix addresses also match...*/ 99 if ((current -> nx_ipv6_prefix_entry_prefix_length == (ULONG)prefix_length) && 100 CHECK_IPV6_ADDRESSES_SAME(prefix, current -> nx_ipv6_prefix_entry_network_address)) 101 { 102 103 /* Delete this entry. */ 104 _nx_ipv6_prefix_list_delete_entry(ip_ptr, current); 105 106 /* All done. return */ 107 return; 108 } 109 /* Move to the next entry. */ 110 current = current -> nx_ipv6_prefix_entry_next; 111 } 112 113 /* No match was found. */ 114 return; 115 } 116 117 118 #endif /* FEATURE_NX_IPV6 */ 119 120
