Method: Socket::AncillaryData#timestamp

Defined in:
ancdata.c

#timestamp ⇒ Time

returns the timestamp as a time object.

ancillarydata should be one of following type:

  • SOL_SOCKET/SCM_TIMESTAMP (microsecond) GNU/Linux, FreeBSD, NetBSD, OpenBSD, Solaris, MacOS X

  • SOL_SOCKET/SCM_TIMESTAMPNS (nanosecond) GNU/Linux

  • SOL_SOCKET/SCM_BINTIME (2**(-64) second) FreeBSD

    Addrinfo.udp(“127.0.0.1”, 0).bind {|s1|

    Addrinfo.udp("127.0.0.1", 0).bind {|s2|
  s1.setsockopt(:SOCKET, :TIMESTAMP, true)
  s2.send "a", 0, s1.local_address
  ctl = s1.recvmsg.last
  p ctl    #=> #<Socket::AncillaryData: INET SOCKET TIMESTAMP 2009-02-24 17:35:46.775581>
  t = ctl.timestamp
  p t      #=> 2009-02-24 17:35:46 +0900
  p t.usec #=> 775581
  p t.nsec #=> 775581000
}

    }

Returns:

  • (Time) 


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# File 'ancdata.c', line 299

static VALUE
ancillary_timestamp(VALUE self)
{
    int level, type;
    VALUE data;
    VALUE result = Qnil;

    level = ancillary_level(self);
    type = ancillary_type(self);
    data = ancillary_data(self);

# ifdef SCM_TIMESTAMP
    if (level == SOL_SOCKET && type == SCM_TIMESTAMP &&
        RSTRING_LEN(data) == sizeof(struct timeval)) {
        struct timeval tv;
        memcpy((char*)&tv, RSTRING_PTR(data), sizeof(tv));
        result = rb_time_new(tv.tv_sec, tv.tv_usec);
    }
# endif

# ifdef SCM_TIMESTAMPNS
    if (level == SOL_SOCKET && type == SCM_TIMESTAMPNS &&
        RSTRING_LEN(data) == sizeof(struct timespec)) {
        struct timespec ts;
        memcpy((char*)&ts, RSTRING_PTR(data), sizeof(ts));
        result = rb_time_nano_new(ts.tv_sec, ts.tv_nsec);
    }
# endif

#define add(x,y) (rb_funcall((x), '+', 1, (y)))
#define mul(x,y) (rb_funcall((x), '*', 1, (y)))
#define quo(x,y) (rb_funcall((x), rb_intern("quo"), 1, (y)))

# ifdef SCM_BINTIME
    if (level == SOL_SOCKET && type == SCM_BINTIME &&
        RSTRING_LEN(data) == sizeof(struct bintime)) {
        struct bintime bt;
	VALUE d, timev;
        memcpy((char*)&bt, RSTRING_PTR(data), sizeof(bt));
	d = ULL2NUM(0x100000000ULL);
	d = mul(d,d);
	timev = add(TIMET2NUM(bt.sec), quo(ULL2NUM(bt.frac), d));
        result = rb_time_num_new(timev, Qnil);
    }
# endif

    if (result == Qnil)
        rb_raise(rb_eTypeError, "timestamp ancillary data expected");

    return result;
}