open-consul/ipaddr/detect.go

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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
New config parser, HCL support, multiple bind addrs (#3480) * new config parser for agent This patch implements a new config parser for the consul agent which makes the following changes to the previous implementation: * add HCL support * all configuration fragments in tests and for default config are expressed as HCL fragments * HCL fragments can be provided on the command line so that they can eventually replace the command line flags. * HCL/JSON fragments are parsed into a temporary Config structure which can be merged using reflection (all values are pointers). The existing merge logic of overwrite for values and append for slices has been preserved. * A single builder process generates a typed runtime configuration for the agent. The new implementation is more strict and fails in the builder process if no valid runtime configuration can be generated. Therefore, additional validations in other parts of the code should be removed. The builder also pre-computes all required network addresses so that no address/port magic should be required where the configuration is used and should therefore be removed. * Upgrade github.com/hashicorp/hcl to support int64 * improve error messages * fix directory permission test * Fix rtt test * Fix ForceLeave test * Skip performance test for now until we know what to do * Update github.com/hashicorp/memberlist to update log prefix * Make memberlist use the default logger * improve config error handling * do not fail on non-existing data-dir * experiment with non-uniform timeouts to get a handle on stalled leader elections * Run tests for packages separately to eliminate the spurious port conflicts * refactor private address detection and unify approach for ipv4 and ipv6. Fixes #2825 * do not allow unix sockets for DNS * improve bind and advertise addr error handling * go through builder using test coverage * minimal update to the docs * more coverage tests fixed * more tests * fix makefile * cleanup * fix port conflicts with external port server 'porter' * stop test server on error * do not run api test that change global ENV concurrently with the other tests * Run remaining api tests concurrently * no need for retry with the port number service * monkey patch race condition in go-sockaddr until we understand why that fails * monkey patch hcl decoder race condidtion until we understand why that fails * monkey patch spurious errors in strings.EqualFold from here * add test for hcl decoder race condition. Run with go test -parallel 128 * Increase timeout again * cleanup * don't log port allocations by default * use base command arg parsing to format help output properly * handle -dc deprecation case in Build * switch autopilot.max_trailing_logs to int * remove duplicate test case * remove unused methods * remove comments about flag/config value inconsistencies * switch got and want around since the error message was misleading. * Removes a stray debug log. * Removes a stray newline in imports. * Fixes TestACL_Version8. * Runs go fmt. * Adds a default case for unknown address types. * Reoders and reformats some imports. * Adds some comments and fixes typos. * Reorders imports. * add unix socket support for dns later * drop all deprecated flags and arguments * fix wrong field name * remove stray node-id file * drop unnecessary patch section in test * drop duplicate test * add test for LeaveOnTerm and SkipLeaveOnInt in client mode * drop "bla" and add clarifying comment for the test * split up tests to support enterprise/non-enterprise tests * drop raft multiplier and derive values during build phase * sanitize runtime config reflectively and add test * detect invalid config fields * fix tests with invalid config fields * use different values for wan sanitiziation test * drop recursor in favor of recursors * allow dns_config.udp_answer_limit to be zero * make sure tests run on machines with multiple ips * Fix failing tests in a few more places by providing a bind address in the test * Gets rid of skipped TestAgent_CheckPerformanceSettings and adds case for builder. * Add porter to server_test.go to make tests there less flaky * go fmt
2017-09-25 18:40:42 +00:00
package ipaddr
import (
"fmt"
"net"
)
// GetPrivateIPv4 returns the list of private network IPv4 addresses on
// all active interfaces.
func GetPrivateIPv4() ([]*net.IPAddr, error) {
addresses, err := activeInterfaceAddresses()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
var addrs []*net.IPAddr
for _, rawAddr := range addresses {
var ip net.IP
switch addr := rawAddr.(type) {
case *net.IPAddr:
ip = addr.IP
case *net.IPNet:
ip = addr.IP
default:
continue
}
if ip.To4() == nil {
continue
}
if !isPrivate(ip) {
continue
}
addrs = append(addrs, &net.IPAddr{IP: ip})
}
return addrs, nil
}
// GetPublicIPv6 returns the list of all public IPv6 addresses
// on all active interfaces.
func GetPublicIPv6() ([]*net.IPAddr, error) {
addresses, err := net.InterfaceAddrs()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
var addrs []*net.IPAddr
for _, rawAddr := range addresses {
var ip net.IP
switch addr := rawAddr.(type) {
case *net.IPAddr:
ip = addr.IP
case *net.IPNet:
ip = addr.IP
default:
continue
}
if ip.To4() != nil {
continue
}
if isPrivate(ip) {
continue
}
addrs = append(addrs, &net.IPAddr{IP: ip})
}
return addrs, nil
}
// privateBlocks contains non-forwardable address blocks which are used
// for private networks. RFC 6890 provides an overview of special
// address blocks.
var privateBlocks = []*net.IPNet{
parseCIDR("10.0.0.0/8"), // RFC 1918 IPv4 private network address
parseCIDR("100.64.0.0/10"), // RFC 6598 IPv4 shared address space
parseCIDR("127.0.0.0/8"), // RFC 1122 IPv4 loopback address
parseCIDR("169.254.0.0/16"), // RFC 3927 IPv4 link local address
parseCIDR("172.16.0.0/12"), // RFC 1918 IPv4 private network address
parseCIDR("192.0.0.0/24"), // RFC 6890 IPv4 IANA address
parseCIDR("192.0.2.0/24"), // RFC 5737 IPv4 documentation address
parseCIDR("192.168.0.0/16"), // RFC 1918 IPv4 private network address
parseCIDR("::1/128"), // RFC 1884 IPv6 loopback address
parseCIDR("fe80::/10"), // RFC 4291 IPv6 link local addresses
parseCIDR("fc00::/7"), // RFC 4193 IPv6 unique local addresses
parseCIDR("fec0::/10"), // RFC 1884 IPv6 site-local addresses
parseCIDR("2001:db8::/32"), // RFC 3849 IPv6 documentation address
}
func parseCIDR(s string) *net.IPNet {
_, block, err := net.ParseCIDR(s)
if err != nil {
panic(fmt.Sprintf("Bad CIDR %s: %s", s, err))
}
return block
}
func isPrivate(ip net.IP) bool {
for _, priv := range privateBlocks {
if priv.Contains(ip) {
return true
}
}
return false
}
// Returns addresses from interfaces that is up
func activeInterfaceAddresses() ([]net.Addr, error) {
var upAddrs []net.Addr
var loAddrs []net.Addr
interfaces, err := net.Interfaces()
if err != nil {
return nil, fmt.Errorf("Failed to get interfaces: %v", err)
}
for _, iface := range interfaces {
// Require interface to be up
if iface.Flags&net.FlagUp == 0 {
continue
}
addresses, err := iface.Addrs()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
if iface.Flags&net.FlagLoopback != 0 {
loAddrs = append(loAddrs, addresses...)
continue
}
upAddrs = append(upAddrs, addresses...)
}
if len(upAddrs) == 0 {
return loAddrs, nil
}
return upAddrs, nil
}