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ipv6_pktinfo_addr 

        # Socket::AncillaryData.ipv6_pktinfo_addr

(from ruby core)
### Implementation from AncillaryData
---
    ancdata.ipv6_pktinfo_addr => addr

---

Extracts addr from IPV6_PKTINFO ancillary data.

IPV6_PKTINFO is defined by RFC 3542.

    addr = Addrinfo.ip("::1")
    ifindex = 0
    ancdata = Socket::AncillaryData.ipv6_pktinfo(addr, ifindex)
    p ancdata.ipv6_pktinfo_addr #=> #<Addrinfo: ::1>

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