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Marvin Drees
3c1f0e0281
* feat(dhcpv6): handle IA_NA/IA_PD requests and config options Adds the DHCPv6 client request exchange with IA_NA/IA_PD handling, reconfigure-renew (RFC 8415), DNS server and domain search options (RFC 3646) and NTP server suboptions (RFC 5908). Signed-off-by: Marvin Drees <marvin.drees@9elements.com> * fix(dhcpv6): bound server-supplied option counts to prevent OOM A DHCPv6 server may place arbitrarily many DNS servers, search domains, NTP entries and delegated prefixes in a single message (RFC 8415). The client appended every entry into growable slices with no upper bound, so a malicious or misconfigured server could drive unbounded allocation. Add a configurable Limits to RequestConfig (with safe defaults) capping each repeated option. The backing arrays are sized to their caps once in BeginRequest and reused across resets, so parsing a server message now performs no allocation and stored entries stay bounded. Add tests asserting the caps are enforced against a flooded Reply and that option parsing is allocation-free after BeginRequest. Signed-off-by: Marvin Drees <marvin.drees@9elements.com> --------- Signed-off-by: Marvin Drees <marvin.drees@9elements.com>