1 /* 2 * net/tipc/addr.h: Include file for TIPC address utility routines 3 * 4 * Copyright (c) 2000-2006, 2018, Ericsson AB 5 * Copyright (c) 2004-2005, Wind River Systems 6 * Copyright (c) 2020-2021, Red Hat Inc 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the names of the copyright holders nor the names of its 18 * contributors may be used to endorse or promote products derived from 19 * this software without specific prior written permission. 20 * 21 * Alternatively, this software may be distributed under the terms of the 22 * GNU General Public License ("GPL") version 2 as published by the Free 23 * Software Foundation. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #ifndef _TIPC_ADDR_H 39 #define _TIPC_ADDR_H 40 41 #include <linux/types.h> 42 #include <linux/tipc.h> 43 #include <net/net_namespace.h> 44 #include <net/netns/generic.h> 45 #include "core.h" 46 47 /* Struct tipc_uaddr: internal version of struct sockaddr_tipc. 48 * Must be kept aligned both regarding field positions and size. 49 */ 50 struct tipc_uaddr { 51 unsigned short family; 52 unsigned char addrtype; 53 signed char scope; 54 union { 55 struct { 56 struct tipc_service_addr sa; 57 u32 lookup_node; 58 }; 59 struct tipc_service_range sr; 60 struct tipc_socket_addr sk; 61 }; 62 }; 63 64 static inline void tipc_uaddr(struct tipc_uaddr *ua, u32 atype, u32 scope, 65 u32 type, u32 lower, u32 upper) 66 { 67 ua->family = AF_TIPC; 68 ua->addrtype = atype; 69 ua->scope = scope; 70 ua->sr.type = type; 71 ua->sr.lower = lower; 72 ua->sr.upper = upper; 73 } 74 75 static inline bool tipc_uaddr_valid(struct tipc_uaddr *ua, int len) 76 { 77 u32 atype; 78 79 if (len < sizeof(struct sockaddr_tipc)) 80 return false; 81 atype = ua->addrtype; 82 if (ua->family != AF_TIPC) 83 return false; 84 if (atype == TIPC_SERVICE_ADDR || atype == TIPC_SOCKET_ADDR) 85 return true; 86 if (atype == TIPC_SERVICE_RANGE) 87 return ua->sr.upper >= ua->sr.lower; 88 return false; 89 } 90 91 static inline u32 tipc_own_addr(struct net *net) 92 { 93 return tipc_net(net)->node_addr; 94 } 95 96 static inline u8 *tipc_own_id(struct net *net) 97 { 98 struct tipc_net *tn = tipc_net(net); 99 100 if (!strlen(tn->node_id_string)) 101 return NULL; 102 return tn->node_id; 103 } 104 105 static inline char *tipc_own_id_string(struct net *net) 106 { 107 return tipc_net(net)->node_id_string; 108 } 109 110 static inline u32 tipc_cluster_mask(u32 addr) 111 { 112 return addr & TIPC_ZONE_CLUSTER_MASK; 113 } 114 115 static inline int tipc_node2scope(u32 node) 116 { 117 return node ? TIPC_NODE_SCOPE : TIPC_CLUSTER_SCOPE; 118 } 119 120 static inline int tipc_scope2node(struct net *net, int sc) 121 { 122 return sc != TIPC_NODE_SCOPE ? 0 : tipc_own_addr(net); 123 } 124 125 static inline int in_own_node(struct net *net, u32 addr) 126 { 127 return addr == tipc_own_addr(net) || !addr; 128 } 129 130 bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr); 131 void tipc_set_node_id(struct net *net, u8 *id); 132 void tipc_set_node_addr(struct net *net, u32 addr); 133 char *tipc_nodeid2string(char *str, u8 *id); 134 135 #endif 136