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tipc: introduce new unified address type for internal use

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We introduce a simplified version of struct sockaddr_tipc, using
anonymous unions and structures. Apart from being nicer to work with,
this struct will come in handy when we in a later commit add another
address type.

Signed-off-by: Jon Maloy <jmaloy@redhat.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Hoang Le <hoang.h.le@dektech.com.au>
Acked-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Acked-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2021-03-16 22:06:10 -04:00 committed by David S. Miller
parent b26b5aa9ce
commit 7823f04f34
2 changed files with 46 additions and 1 deletions
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1
net/tipc/addr.c
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@ -3,6 +3,7 @@
*
* Copyright (c) 2000-2006, 2018, Ericsson AB
* Copyright (c) 2004-2005, 2010-2011, Wind River Systems
* Copyright (c) 2020-2021, Red Hat Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without

46
net/tipc/addr.h
View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, 2018, Ericsson AB
* Copyright (c) 2004-2005, Wind River Systems
* Copyright (c) 2020, Red Hat Inc
* Copyright (c) 2020-2021, Red Hat Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -44,6 +44,50 @@
#include <net/netns/generic.h>
#include "core.h"
/* Struct tipc_uaddr: internal version of struct sockaddr_tipc.
* Must be kept aligned both regarding field positions and size.
*/
struct tipc_uaddr {
unsigned short family;
unsigned char addrtype;
signed char scope;
union {
struct {
struct tipc_service_addr sa;
u32 lookup_node;
};
struct tipc_service_range sr;
struct tipc_socket_addr sk;
};
};
static inline void tipc_uaddr(struct tipc_uaddr *ua, u32 atype, u32 scope,
u32 type, u32 lower, u32 upper)
{
ua->family = AF_TIPC;
ua->addrtype = atype;
ua->scope = scope;
ua->sr.type = type;
ua->sr.lower = lower;
ua->sr.upper = upper;
}
static inline bool tipc_uaddr_valid(struct tipc_uaddr *ua, int len)
{
u32 atype;
if (len < sizeof(struct sockaddr_tipc))
return false;
atype = ua->addrtype;
if (ua->family != AF_TIPC)
return false;
if (atype == TIPC_SERVICE_ADDR || atype == TIPC_SOCKET_ADDR)
return true;
if (atype == TIPC_SERVICE_RANGE)
return ua->sr.upper >= ua->sr.lower;
return false;
}
static inline u32 tipc_own_addr(struct net *net)
{
return tipc_net(net)->node_addr;