// Getifaddrs returns a list of IfData. Unlike with getifaddrs(3) the
// IfData has merged link level and interface address data.
func Getifaddrs() ([]IfData, error) {
var ifaces *C.struct_ifaddrs
if rc, err := C.getifaddrs(&ifaces); rc != 0 {
return []IfData{}, err
}
defer C.freeifaddrs(ifaces)
ips := make(map[string]string)
ifs := []IfData{}
for fi := ifaces; fi != nil; fi = fi.ifa_next {
if fi.ifa_addr == nil {
continue
}
ifaName := C.GoString(fi.ifa_name)
if ip, ok := ntop(fi); ok {
ips[ifaName] = ip
continue // fi.ifa_addr.sa_family == C.AF_INET
}
if fi.ifa_addr.sa_family != C.AF_LINK {
continue
}
data := fi.ifa_data
it := IfData{
Name: ifaName,
InBytes: uint(C.Ibytes(data)),
OutBytes: uint(C.Obytes(data)),
InPackets: uint(C.Ipackets(data)),
OutPackets: uint(C.Opackets(data)),
InErrors: uint(C.Ierrors(data)),
OutErrors: uint(C.Oerrors(data)),
}
if ip, ok := ips[ifaName]; ok {
it.IP = ip
}
ifs = append(ifs, it)
}
for i, ifdata := range ifs {
if ifdata.IP != "" {
continue
}
if ip, ok := ips[ifdata.Name]; ok {
ifs[i].IP = ip
}
}
return ifs, nil
}
func NewInterfaces(CH chan InterfacesInfo) {
var ifaces *C.struct_ifaddrs
if getrc, _ := C.getifaddrs(&ifaces); getrc != 0 {
CH <- InterfacesInfo{}
return
}
defer C.freeifaddrs(ifaces)
ifs := []InterfaceInfo{}
IP := ""
for fi := ifaces; fi != nil; fi = fi.ifa_next {
if fi.ifa_addr == nil {
continue
}
ifa_name := C.GoString(fi.ifa_name)
if IP == "" &&
fi.ifa_addr.sa_family == C.AF_INET &&
!rx_lo.Match([]byte(ifa_name)) &&
realInterfaceName(ifa_name) {
sa_in := (*C.struct_sockaddr_in)(unsafe.Pointer(fi.ifa_addr))
if C.inet_ntop(
C.int(fi.ifa_addr.sa_family), // C.AF_INET,
unsafe.Pointer(&sa_in.sin_addr),
&C.ADDR[0],
C.socklen_t(unsafe.Sizeof(C.ADDR))) != nil {
IP = C.GoString((*C.char)(unsafe.Pointer(&C.ADDR)))
}
}
if fi.ifa_addr.sa_family != C.AF_LINK {
continue
}
data := fi.ifa_data
it := InterfaceInfo{
Name: ifa_name,
InBytes: uint(C.Ibytes(data)),
OutBytes: uint(C.Obytes(data)),
InPackets: uint(C.Ipackets(data)),
OutPackets: uint(C.Opackets(data)),
InErrors: uint(C.Ierrors(data)),
OutErrors: uint(C.Oerrors(data)),
}
if it.InBytes == 0 &&
it.OutBytes == 0 &&
it.InPackets == 0 &&
it.OutPackets == 0 &&
it.InErrors == 0 &&
it.OutErrors == 0 {
continue
}
ifs = append(ifs, it)
}
CH <- InterfacesInfo{
List: ifs,
IP: IP,
}
}