IPv6: Add more check to avoid multiple double colon and illegal char#753
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vathpela merged 1 commit intorhboot:mainfrom Jun 3, 2025
Merged
IPv6: Add more check to avoid multiple double colon and illegal char#753vathpela merged 1 commit intorhboot:mainfrom
vathpela merged 1 commit intorhboot:mainfrom
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More than one double-colon in ipv6 address format is invalid. For example, the IPv6 address 2400::dd00::1 is invalid because it uses the :: (double colon) more than once, which is not allowed. This makes the address ambiguous: there's no way to know how many zero blocks each :: is supposed to compress. The IPv6 standard (RFC 4291) explicitly allows only one :: in an address. Besides, the valid ipv6 characters only include 0–9, a–f, and A–F Signed-off-by: Dennis Tseng <dennis.tseng@suse.com>
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More than one double-colon in ipv6 address format is invalid. For example, the IPv6 address 2400::dd00::1 is invalid because it uses the :: (double colon) more than once, which is not allowed. This makes the address ambiguous: there's no way to know how many zero blocks each :: is supposed to compress. The IPv6 standard (RFC 4291) explicitly allows only one :: in an address.
Besides, the valid ipv6 characters only cover 0–9, a–f, and A–F