2 * net/tipc/addr.c: TIPC address utility routines
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2004-2005, 2010-2011, Wind River Systems
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37 #include <linux/kernel.h>
42 * in_own_cluster - test for cluster inclusion; <0.0.0> always matches
44 int in_own_cluster(struct net *net, u32 addr)
46 return in_own_cluster_exact(net, addr) || !addr;
49 int in_own_cluster_exact(struct net *net, u32 addr)
51 struct tipc_net *tn = net_generic(net, tipc_net_id);
53 return !((addr ^ tn->own_addr) >> 12);
57 * in_own_node - test for node inclusion; <0.0.0> always matches
59 int in_own_node(struct net *net, u32 addr)
61 struct tipc_net *tn = net_generic(net, tipc_net_id);
63 return (addr == tn->own_addr) || !addr;
67 * addr_domain - convert 2-bit scope value to equivalent message lookup domain
69 * Needed when address of a named message must be looked up a second time
70 * after a network hop.
72 u32 addr_domain(struct net *net, u32 sc)
74 struct tipc_net *tn = net_generic(net, tipc_net_id);
76 if (likely(sc == TIPC_NODE_SCOPE))
78 if (sc == TIPC_CLUSTER_SCOPE)
79 return tipc_cluster_mask(tn->own_addr);
80 return tipc_zone_mask(tn->own_addr);
84 * tipc_addr_domain_valid - validates a network domain address
86 * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
87 * where Z, C, and N are non-zero.
89 * Returns 1 if domain address is valid, otherwise 0
91 int tipc_addr_domain_valid(u32 addr)
93 u32 n = tipc_node(addr);
94 u32 c = tipc_cluster(addr);
95 u32 z = tipc_zone(addr);
105 * tipc_addr_node_valid - validates a proposed network address for this node
107 * Accepts <Z.C.N>, where Z, C, and N are non-zero.
109 * Returns 1 if address can be used, otherwise 0
111 int tipc_addr_node_valid(u32 addr)
113 return tipc_addr_domain_valid(addr) && tipc_node(addr);
116 int tipc_in_scope(u32 domain, u32 addr)
118 if (!domain || (domain == addr))
120 if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */
122 if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */
128 * tipc_addr_scope - convert message lookup domain to a 2-bit scope value
130 int tipc_addr_scope(u32 domain)
133 return TIPC_ZONE_SCOPE;
134 if (tipc_node(domain))
135 return TIPC_NODE_SCOPE;
136 if (tipc_cluster(domain))
137 return TIPC_CLUSTER_SCOPE;
138 return TIPC_ZONE_SCOPE;
141 char *tipc_addr_string_fill(char *string, u32 addr)
143 snprintf(string, 16, "<%u.%u.%u>",
144 tipc_zone(addr), tipc_cluster(addr), tipc_node(addr));