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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /net/tipc/addr.c
Initial import
Diffstat (limited to 'net/tipc/addr.c')
-rw-r--r--net/tipc/addr.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/net/tipc/addr.c b/net/tipc/addr.c
new file mode 100644
index 000000000..ba7daa864
--- /dev/null
+++ b/net/tipc/addr.c
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+/*
+ * 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 <linux/kernel.h>
+#include "addr.h"
+#include "core.h"
+
+u32 tipc_own_addr(struct net *net)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+ return tn->own_addr;
+}
+
+/**
+ * in_own_cluster - test for cluster inclusion; <0.0.0> always matches
+ */
+int in_own_cluster(struct net *net, u32 addr)
+{
+ return in_own_cluster_exact(net, addr) || !addr;
+}
+
+int in_own_cluster_exact(struct net *net, u32 addr)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+ return !((addr ^ tn->own_addr) >> 12);
+}
+
+/**
+ * in_own_node - test for node inclusion; <0.0.0> always matches
+ */
+int in_own_node(struct net *net, u32 addr)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+ return (addr == tn->own_addr) || !addr;
+}
+
+/**
+ * addr_domain - convert 2-bit scope value to equivalent message lookup domain
+ *
+ * Needed when address of a named message must be looked up a second time
+ * after a network hop.
+ */
+u32 addr_domain(struct net *net, u32 sc)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+ if (likely(sc == TIPC_NODE_SCOPE))
+ return tn->own_addr;
+ if (sc == TIPC_CLUSTER_SCOPE)
+ return tipc_cluster_mask(tn->own_addr);
+ return tipc_zone_mask(tn->own_addr);
+}
+
+/**
+ * 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;
+}