| /* |
| * net/tipc/addr.c: TIPC address utility routines |
| * |
| * Copyright (c) 2000-2006, Ericsson AB |
| * Copyright (c) 2004-2005, 2010-2011, Wind River Systems |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the names of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core.h" |
| #include "addr.h" |
| |
| /** |
| * tipc_addr_domain_valid - validates a network domain address |
| * |
| * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, |
| * where Z, C, and N are non-zero. |
| * |
| * Returns 1 if domain address is valid, otherwise 0 |
| */ |
| int tipc_addr_domain_valid(u32 addr) |
| { |
| u32 n = tipc_node(addr); |
| u32 c = tipc_cluster(addr); |
| u32 z = tipc_zone(addr); |
| |
| if (n && (!z || !c)) |
| return 0; |
| if (c && !z) |
| return 0; |
| return 1; |
| } |
| |
| /** |
| * tipc_addr_node_valid - validates a proposed network address for this node |
| * |
| * Accepts <Z.C.N>, where Z, C, and N are non-zero. |
| * |
| * Returns 1 if address can be used, otherwise 0 |
| */ |
| int tipc_addr_node_valid(u32 addr) |
| { |
| return tipc_addr_domain_valid(addr) && tipc_node(addr); |
| } |
| |
| int tipc_in_scope(u32 domain, u32 addr) |
| { |
| if (!domain || (domain == addr)) |
| return 1; |
| if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */ |
| return 1; |
| if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */ |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * tipc_addr_scope - convert message lookup domain to a 2-bit scope value |
| */ |
| int tipc_addr_scope(u32 domain) |
| { |
| if (likely(!domain)) |
| return TIPC_ZONE_SCOPE; |
| if (tipc_node(domain)) |
| return TIPC_NODE_SCOPE; |
| if (tipc_cluster(domain)) |
| return TIPC_CLUSTER_SCOPE; |
| return TIPC_ZONE_SCOPE; |
| } |
| |
| char *tipc_addr_string_fill(char *string, u32 addr) |
| { |
| snprintf(string, 16, "<%u.%u.%u>", |
| tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); |
| return string; |
| } |