Method deprecated or moved
This method is deprecated or moved on the latest stable version.
The last existing version (v1_9_2_180) is shown here.
ip_pktinfo()
public
Extracts addr, ifindex and spec_dst from IP_PKTINFO ancillary data.
IP_PKTINFO is not standard.
Supported platform: GNU/Linux
addr = Addrinfo.ip("127.0.0.1")
ifindex = 0
spec_dest = Addrinfo.ip("127.0.0.1")
ancdata = Socket::AncillaryData.ip_pktinfo(addr, ifindex, spec_dest)
p ancdata.ip_pktinfo
static VALUE
ancillary_ip_pktinfo(VALUE self)
{
int level, type;
VALUE data;
struct in_pktinfo pktinfo;
struct sockaddr_in sa;
VALUE v_spec_dst, v_addr;
level = ancillary_level(self);
type = ancillary_type(self);
data = ancillary_data(self);
if (level != IPPROTO_IP || type != IP_PKTINFO ||
RSTRING_LEN(data) != sizeof(struct in_pktinfo)) {
rb_raise(rb_eTypeError, "IP_PKTINFO ancillary data expected");
}
memcpy(&pktinfo, RSTRING_PTR(data), sizeof(struct in_pktinfo));
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
memcpy(&sa.sin_addr, &pktinfo.ipi_addr, sizeof(sa.sin_addr));
v_addr = rsock_addrinfo_new((struct sockaddr *)&sa, sizeof(sa), PF_INET, 0, 0, Qnil, Qnil);
sa.sin_family = AF_INET;
memcpy(&sa.sin_addr, &pktinfo.ipi_spec_dst, sizeof(sa.sin_addr));
v_spec_dst = rsock_addrinfo_new((struct sockaddr *)&sa, sizeof(sa), PF_INET, 0, 0, Qnil, Qnil);
return rb_ary_new3(3, v_addr, UINT2NUM(pktinfo.ipi_ifindex), v_spec_dst);
}