// We currently only set up information for interfaces with IPv4
// addresses associated with them.
//
// Solaris's getifaddrs() (currently) only returns results for
// interfaces that have been configured with IP addresses.
// Inactive interfaces are thus silently omitted, unlike on eg
// Linux.
//
// TODO: I should figure out some scheme of first trying the
// net.Interfaces() stuff, so that when Go 1.x finally gets
// support for it on Solaris we'll automatically start to
// use it.
func setupNetinfo() error {
var ifap *C.struct_ifaddrs
rc, err := C.getifaddrs(&ifap)
if rc != 0 || err != nil {
C.freeifaddrs(ifap)
return err
}
ifaces := make(set)
// Note that the ifap list has one entry *per IP*; if a single
// interface has multiple IPs associated with it, via eg
// aliases, the interface will show up multiple times as we
// traverse the list. This is unlike net.Interfaces().
for fi := ifap; fi != nil; fi = fi.ifa_next {
// sorry, I only deal with IPv4 right now.
if fi.ifa_addr.sa_family != C.AF_INET {
continue
}
iname := C.GoString(fi.ifa_name)
ifaces.add(iname)
if (fi.ifa_flags & C.IFF_LOOPBACK) > 0 {
netinfo.loopbacks.add(iname)
}
if (fi.ifa_flags & C.IFF_POINTOPOINT) > 0 {
netinfo.pointtopoint.add(iname)
}
// Get the IPv4 address associated with this entry.
// We set it up as a string.
//
// Reverse engineering what the sin_addr field is
// called by CGo was a pain in the ass. Thank goodness
// for %#v is all I can say; CGo apparently takes the
// leading _ off what is really '_S_un' for its own
// reasons.
//
// Because this is a union, CGo sets it up as a
// uint8 buffer. This is very convenient for us because
// we want to interpret it that way anyways so we can
// just Sprintf() the bytes into a string.
t := (*C.struct_sockaddr_in)(unsafe.Pointer(fi.ifa_addr)).sin_addr.S_un
ipstr := fmt.Sprintf("%d.%d.%d.%d", t[0], t[1], t[2], t[3])
netinfo.ipmap.add(ipstr, iname)
}
C.freeifaddrs(ifap)
netinfo.ifaces = ifaces.members()
return nil
}
func getNetDevStats() (map[string]map[string]string, error) {
netDev := map[string]map[string]string{}
var ifap, ifa *C.struct_ifaddrs
if C.getifaddrs(&ifap) == -1 {
return nil, errors.New("getifaddrs() failed")
}
defer C.freeifaddrs(ifap)
for ifa = ifap; ifa != nil; ifa = ifa.ifa_next {
if ifa.ifa_addr.sa_family == C.AF_LINK {
devStats := map[string]string{}
data := (*C.struct_if_data)(ifa.ifa_data)
devStats["receive_packets"] = strconv.Itoa(int(data.ifi_ipackets))
devStats["transmit_packets"] = strconv.Itoa(int(data.ifi_opackets))
devStats["receive_errs"] = strconv.Itoa(int(data.ifi_ierrors))
devStats["transmit_errs"] = strconv.Itoa(int(data.ifi_oerrors))
devStats["receive_bytes"] = strconv.Itoa(int(data.ifi_ibytes))
devStats["transmit_bytes"] = strconv.Itoa(int(data.ifi_obytes))
devStats["receive_multicast"] = strconv.Itoa(int(data.ifi_imcasts))
devStats["transmit_multicast"] = strconv.Itoa(int(data.ifi_omcasts))
devStats["receive_drop"] = strconv.Itoa(int(data.ifi_iqdrops))
devStats["transmit_drop"] = strconv.Itoa(int(data.ifi_oqdrops))
netDev[C.GoString(ifa.ifa_name)] = devStats
}
}
return netDev, nil
}
func getNetDevStats(ignore *regexp.Regexp) (map[string]map[string]string, error) {
netDev := map[string]map[string]string{}
var ifap, ifa *C.struct_ifaddrs
if C.getifaddrs(&ifap) == -1 {
return nil, errors.New("getifaddrs() failed")
}
defer C.freeifaddrs(ifap)
for ifa = ifap; ifa != nil; ifa = ifa.ifa_next {
if ifa.ifa_addr.sa_family == C.AF_LINK {
dev := C.GoString(ifa.ifa_name)
if ignore.MatchString(dev) {
log.Debugf("Ignoring device: %s", dev)
continue
}
devStats := map[string]string{}
data := (*C.struct_if_data)(ifa.ifa_data)
devStats["receive_packets"] = strconv.FormatUint(uint64(data.ifi_ipackets), 10)
devStats["transmit_packets"] = strconv.FormatUint(uint64(data.ifi_opackets), 10)
devStats["receive_errs"] = strconv.FormatUint(uint64(data.ifi_ierrors), 10)
devStats["transmit_errs"] = strconv.FormatUint(uint64(data.ifi_oerrors), 10)
devStats["receive_bytes"] = strconv.FormatUint(uint64(data.ifi_ibytes), 10)
devStats["transmit_bytes"] = strconv.FormatUint(uint64(data.ifi_obytes), 10)
devStats["receive_multicast"] = strconv.FormatUint(uint64(data.ifi_imcasts), 10)
devStats["transmit_multicast"] = strconv.FormatUint(uint64(data.ifi_omcasts), 10)
netDev[dev] = devStats
}
}
return netDev, nil
}
func NewInterfaces() ([]InterfaceTotal, string) {
var ifaces *C.struct_ifaddrs
if getrc, _ := C.getifaddrs(&ifaces); getrc != 0 {
return []InterfaceTotal{}, ""
}
defer C.freeifaddrs(ifaces)
ifs := []InterfaceTotal{}
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 &&
ifa_name != "lo" &&
!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
if C.Ibytes(data) == 0 &&
C.Obytes(data) == 0 {
continue
}
ifs = append(ifs, InterfaceTotal{
Name: ifa_name,
In: uint(C.Ibytes(data)),
Out: uint(C.Obytes(data)),
})
}
return ifs, IP
}
// 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,
}
}