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util: Allow IN4_IS_* macros to operate on untyped addresses

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The IN4_IS_*() macros expect a pointer to a struct in_addr.  That
makes sense, but sometimes we have an IPv4 address as a void * pointer
or union type which makes these less convenient.  Additionally, this
doesn't match the behaviour of the standard library's IN6_IS_*()
macros on which they're modelled, nor our own IN4_ARE_ADDR_EQUAL().

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-02-28 22:25:05 +11:00 committed by Stefano Brivio
parent f6e6e8ad40
commit e196eada6f
1 changed files with 4 additions and 4 deletions
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8
util.h
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@ -111,13 +111,13 @@
#endif
#define IN4_IS_ADDR_UNSPECIFIED(a) \
((a)->s_addr == htonl_constant(INADDR_ANY))
(((struct in_addr *)(a))->s_addr == htonl_constant(INADDR_ANY))
#define IN4_IS_ADDR_BROADCAST(a) \
((a)->s_addr == htonl_constant(INADDR_BROADCAST))
(((struct in_addr *)(a))->s_addr == htonl_constant(INADDR_BROADCAST))
#define IN4_IS_ADDR_LOOPBACK(a) \
(ntohl((a)->s_addr) >> IN_CLASSA_NSHIFT == IN_LOOPBACKNET)
(ntohl(((struct in_addr *)(a))->s_addr) >> IN_CLASSA_NSHIFT == IN_LOOPBACKNET)
#define IN4_IS_ADDR_MULTICAST(a) \
(IN_MULTICAST(ntohl((a)->s_addr)))
(IN_MULTICAST(ntohl(((struct in_addr *)(a))->s_addr)))
#define IN4_ARE_ADDR_EQUAL(a, b) \
(((struct in_addr *)(a))->s_addr == ((struct in_addr *)b)->s_addr)
#define IN4ADDR_LOOPBACK_INIT \