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// Copyright 2016 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package main
import (
"flag"
"fmt"
"strings"
"sync"
"github.com/google/syzkaller/pkg/config"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/rpctype"
"github.com/google/syzkaller/syz-hub/state"
)
var (
flagConfig = flag.String("config", "", "config file")
)
type Config struct {
HTTP string
RPC string
Workdir string
Clients []struct {
Name string
Key string
}
}
type Hub struct {
mu sync.Mutex
st *state.State
keys map[string]string
}
func main() {
flag.Parse()
cfg := new(Config)
if err := config.LoadFile(*flagConfig, cfg); err != nil {
log.Fatal(err)
}
log.EnableLogCaching(1000, 1<<20)
st, err := state.Make(cfg.Workdir)
if err != nil {
log.Fatalf("failed to load state: %v", err)
}
hub := &Hub{
st: st,
keys: make(map[string]string),
}
for _, mgr := range cfg.Clients {
hub.keys[mgr.Name] = mgr.Key
}
hub.initHTTP(cfg.HTTP)
s, err := rpctype.NewRPCServer(cfg.RPC, "Hub", hub)
if err != nil {
log.Fatalf("failed to create rpc server: %v", err)
}
log.Logf(0, "serving rpc on tcp://%v", s.Addr())
s.Serve()
}
func (hub *Hub) Connect(a *rpctype.HubConnectArgs, r *int) error {
name, err := hub.auth(a.Client, a.Key, a.Manager)
if err != nil {
return err
}
hub.mu.Lock()
defer hub.mu.Unlock()
log.Logf(0, "connect from %v: domain=%v fresh=%v calls=%v corpus=%v",
name, a.Domain, a.Fresh, len(a.Calls), len(a.Corpus))
if err := hub.st.Connect(name, a.Domain, a.Fresh, a.Calls, a.Corpus); err != nil {
log.Logf(0, "connect error: %v", err)
return err
}
return nil
}
func (hub *Hub) Sync(a *rpctype.HubSyncArgs, r *rpctype.HubSyncRes) error {
name, err := hub.auth(a.Client, a.Key, a.Manager)
if err != nil {
return err
}
hub.mu.Lock()
defer hub.mu.Unlock()
domain, inputs, more, err := hub.st.Sync(name, a.Add, a.Del)
if err != nil {
log.Logf(0, "sync error: %v", err)
return err
}
if domain != "" {
r.Inputs = inputs
} else {
for _, inp := range inputs {
r.Progs = append(r.Progs, inp.Prog)
}
}
r.More = more
for _, repro := range a.Repros {
if err := hub.st.AddRepro(name, repro); err != nil {
log.Logf(0, "add repro error: %v", err)
}
}
if a.NeedRepros {
repro, err := hub.st.PendingRepro(name)
if err != nil {
log.Logf(0, "sync error: %v", err)
}
if repro != nil {
r.Repros = [][]byte{repro}
}
}
log.Logf(0, "sync from %v: recv: add=%v del=%v repros=%v; send: progs=%v repros=%v pending=%v",
name, len(a.Add), len(a.Del), len(a.Repros), len(inputs), len(r.Repros), more)
return nil
}
func (hub *Hub) auth(client, key, manager string) (string, error) {
if expectedKey, ok := hub.keys[client]; !ok || key != expectedKey {
log.Logf(0, "connect from unauthorized client %v", client)
return "", fmt.Errorf("unauthorized manager")
}
if manager == "" {
manager = client
} else if !strings.HasPrefix(manager, client) {
log.Logf(0, "manager %v does not have client prefix %v", manager, client)
return "", fmt.Errorf("unauthorized manager")
}
return manager, nil
}
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