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Update comments in configuration and some godoc descriptions

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This commit is contained in:
Neil Alexander 2018-11-06 22:57:53 +00:00
parent a3a53f92c3
commit 39dab53ac7
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GPG Key ID: A02A2019A2BB0944
3 changed files with 23 additions and 8 deletions
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13
src/yggdrasil/ckr.go
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@ -28,6 +28,7 @@ type cryptokey_route struct {
destination []byte
}
// Initialise crypto-key routing. This must be done before any other CKR calls.
func (c *cryptokey) init(core *Core) {
c.core = core
c.ipv4routes = make([]cryptokey_route, 0)
@ -38,14 +39,19 @@ func (c *cryptokey) init(core *Core) {
c.ipv6sources = make([]net.IPNet, 0)
}
// Enable or disable crypto-key routing.
func (c *cryptokey) setEnabled(enabled bool) {
c.enabled = enabled
}
// Check if crypto-key routing is enabled.
func (c *cryptokey) isEnabled() bool {
return c.enabled
}
// Check whether the given address (with the address length specified in bytes)
// matches either the current node's address, the node's routed subnet or the
// list of subnets specified in IPv4Sources/IPv6Sources.
func (c *cryptokey) isValidSource(addr address, addrlen int) bool {
ip := net.IP(addr[:addrlen])
@ -86,6 +92,8 @@ func (c *cryptokey) isValidSource(addr address, addrlen int) bool {
return false
}
// Adds a source subnet, which allows traffic with these source addresses to
// be tunnelled using crypto-key routing.
func (c *cryptokey) addSourceSubnet(cidr string) error {
// Is the CIDR we've been given valid?
_, ipnet, err := net.ParseCIDR(cidr)
@ -121,6 +129,8 @@ func (c *cryptokey) addSourceSubnet(cidr string) error {
return nil
}
// Adds a destination route for the given CIDR to be tunnelled to the node
// with the given BoxPubKey.
func (c *cryptokey) addRoute(cidr string, dest string) error {
// Is the CIDR we've been given valid?
ipaddr, ipnet, err := net.ParseCIDR(cidr)
@ -190,6 +200,9 @@ func (c *cryptokey) addRoute(cidr string, dest string) error {
return errors.New("Unspecified error")
}
// Looks up the most specific route for the given address (with the address
// length specified in bytes) from the crypto-key routing table. An error is
// returned if the address is not suitable or no route was found.
func (c *cryptokey) getPublicKeyForAddress(addr address, addrlen int) (boxPubKey, error) {
// Check if the address is a valid Yggdrasil address - if so it
// is exempt from all CKR checking

16
src/yggdrasil/config/config.go
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@ -4,8 +4,8 @@ package config
type NodeConfig struct {
Listen string `comment:"Listen address for peer connections. Default is to listen for all\nTCP connections over IPv4 and IPv6 with a random port."`
AdminListen string `comment:"Listen address for admin connections Default is to listen for local\nconnections either on TCP/9001 or a UNIX socket depending on your\nplatform. Use this value for yggdrasilctl -endpoint=X."`
Peers []string `comment:"List of connection strings for static peers in URI format, i.e.\ntcp://a.b.c.d:e or socks://a.b.c.d:e/f.g.h.i:j."`
InterfacePeers map[string][]string `comment:"List of connection strings for static peers in URI format, arranged\nby source interface, i.e. { \"eth0\": [ tcp://a.b.c.d:e ] }. Note that\nSOCKS peerings will NOT be affected by this option and should go in\nthe \"Peers\" section instead."`
Peers []string `comment:"List of connection strings for static peers in URI format, e.g.\ntcp://a.b.c.d:e or socks://a.b.c.d:e/f.g.h.i:j."`
InterfacePeers map[string][]string `comment:"List of connection strings for static peers in URI format, arranged\nby source interface, e.g. { \"eth0\": [ tcp://a.b.c.d:e ] }. Note that\nSOCKS peerings will NOT be affected by this option and should go in\nthe \"Peers\" section instead."`
ReadTimeout int32 `comment:"Read timeout for connections, specified in milliseconds. If less\nthan 6000 and not negative, 6000 (the default) is used. If negative,\nreads won't time out."`
AllowedEncryptionPublicKeys []string `comment:"List of peer encryption public keys to allow or incoming TCP\nconnections from. If left empty/undefined then all connections\nwill be allowed by default."`
EncryptionPublicKey string `comment:"Your public encryption key. Your peers may ask you for this to put\ninto their AllowedEncryptionPublicKeys configuration."`
@ -17,7 +17,7 @@ type NodeConfig struct {
IfTAPMode bool `comment:"Set local network interface to TAP mode rather than TUN mode if\nsupported by your platform - option will be ignored if not."`
IfMTU int `comment:"Maximux Transmission Unit (MTU) size for your local TUN/TAP interface.\nDefault is the largest supported size for your platform. The lowest\npossible value is 1280."`
SessionFirewall SessionFirewall `comment:"The session firewall controls who can send/receive network traffic\nto/from. This is useful if you want to protect this node without\nresorting to using a real firewall. This does not affect traffic\nbeing routed via this node to somewhere else. Rules are prioritised as\nfollows: blacklist, whitelist, always allow outgoing, direct, remote."`
TunnelRouting TunnelRouting `comment:"Allow tunneling non-Yggdrasil traffic over Yggdrasil."`
TunnelRouting TunnelRouting `comment:"Allow tunneling non-Yggdrasil traffic over Yggdrasil. This effectively\nallows you to use Yggdrasil to route to, or to bridge other networks,\nsimilar to a VPN tunnel. Tunnelling works between any two nodes and\ndoes not require them to be directly peered."`
//Net NetConfig `comment:"Extended options for connecting to peers over other networks."`
}
@ -39,9 +39,9 @@ type SessionFirewall struct {
// TunnelRouting contains the crypto-key routing tables for tunneling
type TunnelRouting struct {
Enable bool `comment:"Enable or disable tunneling."`
IPv6Destinations map[string]string `comment:"IPv6 subnets, mapped to the EncryptionPublicKey to which they should\nbe routed to."`
IPv6Sources []string `comment:"Optional IPv6 subnets which are allowed to be used as source addresses\nin addition to this node's Yggdrasil address/subnet."`
IPv4Destinations map[string]string `comment:"IPv4 subnets, mapped to the EncryptionPublicKey to which they should\nbe routed to."`
IPv4Sources []string `comment:"Optional IPv4 subnets which are allowed to be used as source addresses."`
Enable bool `comment:"Enable or disable tunnel routing."`
IPv6Destinations map[string]string `comment:"IPv6 CIDR subnets, mapped to the EncryptionPublicKey to which they\nshould be routed, e.g. { \"aaaa:bbbb:cccc::/e\": \"boxpubkey\", ... }"`
IPv6Sources []string `comment:"Optional IPv6 source subnets which are allowed to be tunnelled in\naddition to this node's Yggdrasil address/subnet. If not\nspecified, only traffic originating from this node's Yggdrasil\naddress or subnet will be tunnelled."`
IPv4Destinations map[string]string `comment:"IPv4 CIDR subnets, mapped to the EncryptionPublicKey to which they\nshould be routed, e.g. { \"a.b.c.d/e\": \"boxpubkey\", ... }"`
IPv4Sources []string `comment:"IPv4 source subnets which are allowed to be tunnelled. Unlike for\nIPv6, this option is required for bridging IPv4 traffic. Only\ntraffic with a source matching these subnets will be tunnelled."`
}

2
src/yggdrasil/router.go
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@ -140,6 +140,7 @@ func (r *router) sendPacket(bs []byte) {
copy(sourceAddr[:addrlen], bs[12:])
copy(dest[:addrlen], bs[16:])
} else {
// Unknown address length
return
}
if !r.cryptokey.isValidSource(sourceAddr, addrlen) {
@ -287,6 +288,7 @@ func (r *router) recvPacket(bs []byte, sinfo *sessionInfo) {
copy(sourceAddr[:addrlen], bs[12:])
copy(dest[:addrlen], bs[16:])
} else {
// Unknown address length
return
}
if !r.cryptokey.isValidSource(dest, addrlen) {