Introduce dnsmasq library#2
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Port of dnsmasq 2.91 as a DNS forwarder/cache over UDP and TCP, with optional DNSSEC validation via lib-nettle (libhogweed + mini-gmp). adaptations: - patches 0001-0003 work around lwIP's lack of IP_PKTINFO so both wildcard and bind-interfaces modes function (non-fatal setsockopt, no pktinfo cmsg in sendmsg, check_dst=0 on receive). - patch 0004 adapts the DNSSEC code to Nettle 4.0's hash-digest API. - patch 0005 reads netlink replies directly instead of the MSG_PEEK|MSG_TRUNC sizing pass: posix-netlink ignores recvmsg flags, so a peek consumes the queued message and the next read blocks forever. - main.c provides main() and a uname stub (kernel_version() expects a Linux-style release string). - include/ carries shims for Linux-only headers Unikraft lacks Signed-off-by: Tushar Verma <tusharVermaiota@proton.me>
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Port of dnsmasq 2.91 as a DNS forwarder/cache over UDP and TCP, with optional DNSSEC validation via lib-nettle (libhogweed + mini-gmp).
adaptations:
!-> requires unikraft/lib-nettle#2