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LibC: Spec compliant IN6_IS_ADDR_V4MAPPED

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An IPv4 mapped IPv6 address consist of 80 "0" bits, followed by 16 "1"
bits, followed by the 32-bit IPv4 address.

Example of IPv4 mapped IPv6 address:
IPv4 address: 169.219.13.133
IPv6 address: 0000:0000:0000:0000:FFFF:A9DB:0D85
Simplified  : ::FFFF:A9DB:0D85
This commit is contained in:
Kenneth Myhra 2021-09-20 08:10:14 +02:00 committed by Andreas Kling
parent f84a7e2e22
commit 3b901e5b2b
Notes: sideshowbarker 2024-07-18 03:36:56 +09:00 
Author: https://github.com/kennethmyhra
Commit: https://github.com/SerenityOS/serenity/commit/3b901e5b2b1
Pull-request: https://github.com/SerenityOS/serenity/pull/10149
1 changed files with 1 additions and 1 deletions
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2
Userland/Libraries/LibC/netinet/in.h
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@ -45,6 +45,6 @@ static inline uint32_t ntohl(uint32_t value)
(addr->s6_addr[0] == 0 && addr->s6_addr[1] == 0 && addr->s6_addr[2] == 0 && addr->s6_addr[3] == 0 && addr->s6_addr[4] == 0 && addr->s6_addr[5] == 0 && addr->s6_addr[6] == 0 && addr->s6_addr[7] == 0 && addr->s6_addr[8] == 0 && addr->s6_addr[9] == 0 && addr->s6_addr[10] == 0 && addr->s6_addr[11] == 0 && addr->s6_addr[12] == 0 && addr->s6_addr[13] == 0 && addr->s6_addr[14] == 0 && addr->s6_addr[15] == 1)
#define IN6_IS_ADDR_V4MAPPED(addr) \
((((addr)->s6_addr[0]) == 0) && (((addr)->s6_addr[1]) == 0) && (((addr)->s6_addr[2]) == 0) && (((addr)->s6_addr[3]) == 0) && (((addr)->s6_addr[4]) == 0) && (((addr)->s6_addr[5]) == 0xFFFF))
((((addr)->s6_addr[0]) == 0) && (((addr)->s6_addr[1]) == 0) && (((addr)->s6_addr[2]) == 0) && (((addr)->s6_addr[3]) == 0) && (((addr)->s6_addr[4]) == 0) && (((addr)->s6_addr[5]) == 0) && (((addr)->s6_addr[6]) == 0) && (((addr)->s6_addr[7]) == 0) && (((addr)->s6_addr[8]) == 0) && (((addr)->s6_addr[9]) == 0) && (((addr)->s6_addr[10]) == 0xFF) && (((addr)->s6_addr[11]) == 0xFF))
__END_DECLS