ipv6_pktinfo(p1, p2)
public
Returns new ancillary data for IPV6_PKTINFO.
IPV6_PKTINFO is defined by RFC 3542.
addr = Addrinfo.ip("::1")
ifindex = 0
p Socket::AncillaryData.ipv6_pktinfo(addr, ifindex)
static VALUE
ancillary_s_ipv6_pktinfo(VALUE self, VALUE v_addr, VALUE v_ifindex)
{
unsigned int ifindex;
struct sockaddr_in6 sa;
struct in6_pktinfo pktinfo;
SockAddrStringValue(v_addr);
ifindex = NUM2UINT(v_ifindex);
memset(&pktinfo, 0, sizeof(pktinfo));
memset(&sa, 0, sizeof(sa));
if (RSTRING_LEN(v_addr) != sizeof(sa))
rb_raise(rb_eArgError, "addr size different to AF_INET6 sockaddr");
memcpy(&sa, RSTRING_PTR(v_addr), sizeof(sa));
if (sa.sin6_family != AF_INET6)
rb_raise(rb_eArgError, "addr is not AF_INET6 sockaddr");
memcpy(&pktinfo.ipi6_addr, &sa.sin6_addr, sizeof(pktinfo.ipi6_addr));
pktinfo.ipi6_ifindex = ifindex;
return ancdata_new(AF_INET6, IPPROTO_IPV6, IPV6_PKTINFO, rb_str_new((char *)&pktinfo, sizeof(pktinfo)));
}