# class Socket::Ifaddr

`Socket::Ifaddr` represents a result of getifaddrs() function.

### Public Instance Methods

addr → addrinfo click to toggle source

Returns the address of ifaddr. nil is returned if address is not available in ifaddr.

    static VALUE
    ifaddr_addr(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        if (ifa->ifa_addr)
            return rsock_sockaddr_obj(ifa->ifa_addr, rsock_sockaddr_len(ifa->ifa_addr));
        return Qnil;
    }

broadaddr → addrinfo click to toggle source

Returns the broadcast address of ifaddr. nil is returned if the flags doesn't have IFF_BROADCAST.

    static VALUE
    ifaddr_broadaddr(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        if ((ifa->ifa_flags & IFF_BROADCAST) && ifa->ifa_broadaddr)
            return rsock_sockaddr_obj(ifa->ifa_broadaddr, rsock_sockaddr_len(ifa->ifa_broadaddr));
        return Qnil;
    }

dstaddr → addrinfo click to toggle source

Returns the destination address of ifaddr. nil is returned if the flags doesn't have IFF_POINTOPOINT.

    static VALUE
    ifaddr_dstaddr(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        if ((ifa->ifa_flags & IFF_POINTOPOINT) && ifa->ifa_dstaddr)
            return rsock_sockaddr_obj(ifa->ifa_dstaddr, rsock_sockaddr_len(ifa->ifa_dstaddr));
        return Qnil;
    }

flags → integer click to toggle source

Returns the flags of ifaddr.

    static VALUE
    ifaddr_flags(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        return IFAFLAGS2NUM(ifa->ifa_flags);
    }

ifindex → integer click to toggle source

Returns the interface index of ifaddr.

    static VALUE
    ifaddr_ifindex(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        unsigned int ifindex = if_nametoindex(ifa->ifa_name);
        if (ifindex == 0) {
            rb_raise(rb_eArgError, "invalid interface name: %s", ifa->ifa_name);
        }
        return UINT2NUM(ifindex);
    }

inspect → string click to toggle source

Returns a string to show contents of ifaddr.

    static VALUE
    ifaddr_inspect(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        VALUE result;

        result = rb_str_new_cstr("#<");

        rb_str_append(result, rb_class_name(CLASS_OF(self)));
        rb_str_cat2(result, " ");
        rb_str_cat2(result, ifa->ifa_name);

        if (ifa->ifa_flags)
            ifaddr_inspect_flags(ifa->ifa_flags, result);

        if (ifa->ifa_addr) {
          rb_str_cat2(result, " ");
          rsock_inspect_sockaddr(ifa->ifa_addr,
              rsock_sockaddr_len(ifa->ifa_addr),
              result);
        }
        if (ifa->ifa_netmask) {
          rb_str_cat2(result, " netmask=");
          rsock_inspect_sockaddr(ifa->ifa_netmask,
              rsock_sockaddr_len(ifa->ifa_netmask),
              result);
        }

        if ((ifa->ifa_flags & IFF_BROADCAST) && ifa->ifa_broadaddr) {
          rb_str_cat2(result, " broadcast=");
          rsock_inspect_sockaddr(ifa->ifa_broadaddr,
              rsock_sockaddr_len(ifa->ifa_broadaddr),
              result);
        }

        if ((ifa->ifa_flags & IFF_POINTOPOINT) && ifa->ifa_dstaddr) {
          rb_str_cat2(result, " dstaddr=");
          rsock_inspect_sockaddr(ifa->ifa_dstaddr,
              rsock_sockaddr_len(ifa->ifa_dstaddr),
              result);
        }

        rb_str_cat2(result, ">");
        return result;
    }

name → string click to toggle source

Returns the interface name of ifaddr.

    static VALUE
    ifaddr_name(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        return rb_str_new_cstr(ifa->ifa_name);
    }

netmask → addrinfo click to toggle source

Returns the netmask address of ifaddr. nil is returned if netmask is not available in ifaddr.

    static VALUE
    ifaddr_netmask(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        if (ifa->ifa_netmask)
            return rsock_sockaddr_obj(ifa->ifa_netmask, rsock_sockaddr_len(ifa->ifa_netmask));
        return Qnil;
    }

vhid → Integer click to toggle source

Returns the vhid address of ifaddr. nil is returned if there is no vhid.

    static VALUE
    ifaddr_vhid(VALUE self)
    {
        struct ifaddrs *ifa = get_ifaddrs(self);
        if (ifa->ifa_data)
            return (INT2FIX(((struct if_data*)ifa->ifa_data)->ifi_vhid));
        else
            return Qnil;
    }