Files
kubeshark/api/pkg/tap/net_utils.go
gadotroee 0d277faaf8 API and TAP in single process (#24)
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2021-05-02 15:00:53 +03:00

63 lines
1.3 KiB
Go

package tap
import (
"net"
"strings"
)
var privateIPBlocks []*net.IPNet
func init() {
initPrivateIPBlocks()
}
// Get this host ipv4 and ipv6 addresses on all interfaces
func getLocalhostIPs() ([]string, error) {
addrMasks, err := net.InterfaceAddrs()
if err != nil {
// TODO: return error, log error
return nil, err
}
myIPs := make([]string, len(addrMasks))
for ii, addr := range addrMasks {
myIPs[ii] = strings.Split(addr.String(), "/")[0]
}
return myIPs, nil
}
func isPrivateIP(ipStr string) bool {
ip := net.ParseIP(ipStr)
if ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
return true
}
for _, block := range privateIPBlocks {
if block.Contains(ip) {
return true
}
}
return false
}
func initPrivateIPBlocks() {
for _, cidr := range []string{
"127.0.0.0/8", // IPv4 loopback
"10.0.0.0/8", // RFC1918
"172.16.0.0/12", // RFC1918
"192.168.0.0/16", // RFC1918
"169.254.0.0/16", // RFC3927 link-local
"::1/128", // IPv6 loopback
"fe80::/10", // IPv6 link-local
"fc00::/7", // IPv6 unique local addr
} {
_, block, err := net.ParseCIDR(cidr)
if err != nil {
Error("Private-IP-Block-Parse", "parse error on %q: %v", cidr, err)
} else {
privateIPBlocks = append(privateIPBlocks, block)
}
}
}