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subscribed message handlers implemented

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This commit is contained in:
Matthew R Kasun 2022-01-05 10:05:51 -05:00
parent d7828c1983
commit d5cd88cae8
2 changed files with 76 additions and 0 deletions
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1
go.mod
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@ -50,4 +50,5 @@ require (
github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
google.golang.org/appengine v1.4.0 // indirect
gopkg.in/ini.v1 v1.66.2 // indirect
)

75
netclient/functions/daemon.go
View file

@ -11,9 +11,12 @@ import (
"time"
mqtt "github.com/eclipse/paho.mqtt.golang"
"github.com/gravitl/netmaker/models"
"github.com/gravitl/netmaker/netclient/config"
"github.com/gravitl/netmaker/netclient/ncutils"
"github.com/gravitl/netmaker/netclient/wireguard"
"golang.zx2c4.com/wireguard/wgctrl"
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
)
// Daemon runs netclient daemon from command line
@ -81,16 +84,88 @@ var All mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
// NodeUpdate -- mqtt message handler for /update/<NodeID> topic
var NodeUpdate mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
ncutils.Log("received message to update node " + string(msg.Payload()))
//potentiall blocking i/o so do this in a go routine
go func() {
var data models.Node
err := json.Unmarshal(msg.Payload(), &data)
if err != nil {
ncutils.Log("error unmarshalling node update data" + err.Error())
return
}
var cfg config.ClientConfig
cfg.Network = data.Network
cfg.ReadConfig()
nameserver := cfg.Server.CoreDNSAddr
privateKey, err := wireguard.RetrievePrivKey(data.Network)
if err := wireguard.UpdateWgInterface(cfg.Node.Interface, privateKey, nameserver, data); err != nil {
ncutils.Log("error updating wireguard config " + err.Error())
return
}
// path hardcoded for now... should be updated
err = wireguard.ApplyWGQuickConf("/etc/netclient/config/" + cfg.Node.Interface + ".conf")
if err != nil {
ncutils.Log("error restarting wg after peer update " + err.Error())
return
}
}()
}
// UpdatePeers -- mqtt message handler for /update/peers/<NodeID> topic
var UpdatePeers mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
ncutils.Log("received message to update peers " + string(msg.Payload()))
//potentiall blocking i/o so do this in a go routine
go func() {
var peerUpdate models.PeerUpdate
err := json.Unmarshal(msg.Payload(), &peerUpdate)
if err != nil {
ncutils.Log("error unmarshalling peer data")
return
}
var cfg config.ClientConfig
cfg.Network = peerUpdate.Network
cfg.ReadConfig()
err = wireguard.UpdateWgPeers(cfg.Node.Interface, peerUpdate.Peers)
if err != nil {
ncutils.Log("error updating peers" + err.Error())
return
}
// path hardcoded for now... should be updated
err = wireguard.ApplyWGQuickConf("/etc/netclient/config/" + cfg.Node.Interface + ".conf")
if err != nil {
ncutils.Log("error restarting wg after peer update " + err.Error())
return
}
}()
}
// UpdateKeys -- mqtt message handler for /update/keys/<NodeID> topic
var UpdateKeys mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
ncutils.Log("received message to update keys " + string(msg.Payload()))
//potentiall blocking i/o so do this in a go routine
go func() {
var data models.KeyUpdate
if err := json.Unmarshal(msg.Payload(), &data); err != nil {
ncutils.Log("error unmarshalling key update data" + err.Error())
return
}
var cfg config.ClientConfig
cfg.Network = data.Network
cfg.ReadConfig()
key, err := wgtypes.GeneratePrivateKey()
if err != nil {
ncutils.Log("error generating privatekey " + err.Error())
return
}
if err := wireguard.UpdatePrivateKey(data.Interface, key.String()); err != nil {
ncutils.Log("error updating wireguard key " + err.Error())
return
}
publicKey := key.PublicKey()
if token := client.Publish("update/publickey/"+cfg.Node.ID, 0, false, publicKey.String()); token.Wait() && token.Error() != nil {
ncutils.Log("error publishing publickey update " + token.Error().Error())
}
client.Disconnect(250)
}()
}
// Checkin -- go routine that checks for public or local ip changes, publishes changes