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inculude/netinet:add net mask define

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Signed-off-by: anjiahao <anjiahao@xiaomi.com>
This commit is contained in:
anjiahao 2021-11-25 17:30:07 +08:00 committed by Xiang Xiao
parent 500738757f
commit 4db9513658
1 changed files with 23 additions and 1 deletions
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24
include/netinet/in.h
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@ -132,9 +132,31 @@
#define MCAST_EXCLUDE 0
#define MCAST_INCLUDE 1
/* Definitions of the bits in an Internet address integer.
* On subnets, host and network parts are found according to
* the subnet mask, not these masks.
*/
#define IN_CLASSA(a) ((((in_addr_t)(a)) & 0x80000000) == 0)
#define IN_CLASSA_NET 0xff000000
#define IN_CLASSA_NSHIFT 24
#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
#define IN_CLASSA_MAX 128
#define IN_CLASSB(a) ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET 0xffff0000
#define IN_CLASSB_NSHIFT 16
#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
#define IN_CLASSB_MAX 65536
#define IN_CLASSC(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET 0xffffff00
#define IN_CLASSC_NSHIFT 8
#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
/* Test if an IPv4 address is a multicast address */
#define IN_CLASSD(i) (((uint32_t)(i) & 0xf0000000) == 0xe0000000)
#define IN_CLASSD(i) (((in_addr_t)(i) & 0xf0000000) == 0xe0000000)
#define IN_MULTICAST(i) IN_CLASSD(i)
/* Special values of in_addr_t */