1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
// Copyright 2022 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 proxyapp
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net/url"
"os"
"time"
"github.com/google/syzkaller/pkg/config"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/vm/vmimpl"
)
func makeDefaultParams() *proxyAppParams {
return &proxyAppParams{
CommandRunner: osutilCommandContext,
InitRetryDelay: 10 * time.Second,
LogOutput: os.Stdout,
}
}
func init() {
vmimpl.Register("proxyapp", vmimpl.Type{
Ctor: func(env *vmimpl.Env) (vmimpl.Pool, error) {
return ctor(makeDefaultParams(), env)
},
})
}
// Package configuration VARs are mostly needed for tests.
type proxyAppParams struct {
CommandRunner func(context.Context, string, ...string) subProcessCmd
InitRetryDelay time.Duration
LogOutput io.Writer
}
func osutilCommandContext(ctx context.Context, bin string, args ...string) subProcessCmd {
return osutil.CommandContext(ctx, bin, args...)
}
type subProcessCmd interface {
StdinPipe() (io.WriteCloser, error)
StdoutPipe() (io.ReadCloser, error)
StderrPipe() (io.ReadCloser, error)
Start() error
Wait() error
}
// Config is valid if at least cmd or rpc_server_uri specified.
type Config struct {
// cmd is the optional command needed to initialize plugin.
// By default we'll connect to its std[in, out, err].
Command string `json:"cmd"`
// rpc_server_uri is used to specify plugin endpoint address.
// if not specified, we'll connect to the plugin by std[in, out, err].
RPCServerURI string `json:"rpc_server_uri"`
// security can be one of "none", "tls" (for server TLS) and "mtls" for mutal
// TLS.
Security string `json:"security"`
// server_tls_cert points a TLS certificate used to authenticate the server.
// If not provided, the default system certificate pool will be used.
ServerTLSCert string `json:"server_tls_cert"`
// transfer_file_content will send the file content as a byte array in
// addition to the filename.
TransferFileContent bool `json:"transfer_file_content"`
// config is an optional remote plugin config
ProxyAppConfig json.RawMessage `json:"config"`
}
func parseConfig(conf []byte) (*Config, error) {
vmCfg := new(Config)
if err := config.LoadData(conf, vmCfg); err != nil {
return nil, fmt.Errorf("failed to parseConfig(): %w", err)
}
if vmCfg.RPCServerURI == "" && vmCfg.Command == "" {
return nil, errors.New("failed to parseConfig(): neither 'cmd' nor 'rpc_server_uri' specified for plugin")
}
if vmCfg.RPCServerURI != "" && URIParseErr(vmCfg.RPCServerURI) != nil {
return nil, fmt.Errorf("failed to parseConfig(): %w", URIParseErr(vmCfg.RPCServerURI))
}
return vmCfg, nil
}
func URIParseErr(uri string) error {
dest, err := url.Parse("http://" + uri)
if err != nil || dest.Port() == "" || dest.Host != uri {
return fmt.Errorf("bad uri (%v), host:port were expected", uri)
}
return nil
}
|
