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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// nolint
// most of these validate and parse functions have been taken from projectatomic/docker
// and modified for cri-o
package parse
import (
"bufio"
"fmt"
"net"
"net/url"
"os"
"regexp"
"strings"
"github.com/pkg/errors"
)
const (
Protocol_TCP Protocol = 0
Protocol_UDP Protocol = 1
)
type Protocol int32
// PortMapping specifies the port mapping configurations of a sandbox.
type PortMapping struct {
// Protocol of the port mapping.
Protocol Protocol `protobuf:"varint,1,opt,name=protocol,proto3,enum=runtime.Protocol" json:"protocol,omitempty"`
// Port number within the container. Default: 0 (not specified).
ContainerPort int32 `protobuf:"varint,2,opt,name=container_port,json=containerPort,proto3" json:"container_port,omitempty"`
// Port number on the host. Default: 0 (not specified).
HostPort int32 `protobuf:"varint,3,opt,name=host_port,json=hostPort,proto3" json:"host_port,omitempty"`
// Host IP.
HostIp string `protobuf:"bytes,4,opt,name=host_ip,json=hostIp,proto3" json:"host_ip,omitempty"`
}
// Note: for flags that are in the form <number><unit>, use the RAMInBytes function
// from the units package in docker/go-units/size.go
var (
whiteSpaces = " \t"
alphaRegexp = regexp.MustCompile(`[a-zA-Z]`)
domainRegexp = regexp.MustCompile(`^(:?(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]))(:?\.(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])))*)\.?\s*$`)
)
// validateExtraHost validates that the specified string is a valid extrahost and returns it.
// ExtraHost is in the form of name:ip where the ip has to be a valid ip (ipv4 or ipv6).
// for add-host flag
func ValidateExtraHost(val string) (string, error) { // nolint
// allow for IPv6 addresses in extra hosts by only splitting on first ":"
arr := strings.SplitN(val, ":", 2)
if len(arr) != 2 || len(arr[0]) == 0 {
return "", fmt.Errorf("bad format for add-host: %q", val)
}
if _, err := validateIPAddress(arr[1]); err != nil {
return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])
}
return val, nil
}
// validateIPAddress validates an Ip address.
// for dns, ip, and ip6 flags also
func validateIPAddress(val string) (string, error) {
var ip = net.ParseIP(strings.TrimSpace(val))
if ip != nil {
return ip.String(), nil
}
return "", fmt.Errorf("%s is not an ip address", val)
}
func ValidateDomain(val string) (string, error) {
if alphaRegexp.FindString(val) == "" {
return "", fmt.Errorf("%s is not a valid domain", val)
}
ns := domainRegexp.FindSubmatch([]byte(val))
if len(ns) > 0 && len(ns[1]) < 255 {
return string(ns[1]), nil
}
return "", fmt.Errorf("%s is not a valid domain", val)
}
// GetAllLabels retrieves all labels given a potential label file and a number
// of labels provided from the command line.
func GetAllLabels(labelFile, inputLabels []string) (map[string]string, error) {
labels := make(map[string]string)
for _, file := range labelFile {
// Use of parseEnvFile still seems safe, as it's missing the
// extra parsing logic of parseEnv.
// There's an argument that we SHOULD be doing that parsing for
// all environment variables, even those sourced from files, but
// that would require a substantial rework.
if err := parseEnvFile(labels, file); err != nil {
// FIXME: parseEnvFile is using parseEnv, so we need to add extra
// logic for labels.
return nil, err
}
}
for _, label := range inputLabels {
split := strings.SplitN(label, "=", 2)
if split[0] == "" {
return nil, errors.Errorf("invalid label format: %q", label)
}
value := ""
if len(split) > 1 {
value = split[1]
}
labels[split[0]] = value
}
return labels, nil
}
func parseEnv(env map[string]string, line string) error {
data := strings.SplitN(line, "=", 2)
// catch invalid variables such as "=" or "=A"
if data[0] == "" {
return errors.Errorf("invalid environment variable: %q", line)
}
// trim the front of a variable, but nothing else
name := strings.TrimLeft(data[0], whiteSpaces)
if strings.ContainsAny(name, whiteSpaces) {
return errors.Errorf("name %q has white spaces, poorly formatted name", name)
}
if len(data) > 1 {
env[name] = data[1]
} else {
if strings.HasSuffix(name, "*") {
name = strings.TrimSuffix(name, "*")
for _, e := range os.Environ() {
part := strings.SplitN(e, "=", 2)
if len(part) < 2 {
continue
}
if strings.HasPrefix(part[0], name) {
env[part[0]] = part[1]
}
}
} else {
// if only a pass-through variable is given, clean it up.
if val, ok := os.LookupEnv(name); ok {
env[name] = val
}
}
}
return nil
}
// parseEnvFile reads a file with environment variables enumerated by lines
func parseEnvFile(env map[string]string, filename string) error {
fh, err := os.Open(filename)
if err != nil {
return err
}
defer fh.Close()
scanner := bufio.NewScanner(fh)
for scanner.Scan() {
// trim the line from all leading whitespace first
line := strings.TrimLeft(scanner.Text(), whiteSpaces)
// line is not empty, and not starting with '#'
if len(line) > 0 && !strings.HasPrefix(line, "#") {
if err := parseEnv(env, line); err != nil {
return err
}
}
}
return scanner.Err()
}
// ValidateFileName returns an error if filename contains ":"
// as it is currently not supported
func ValidateFileName(filename string) error {
if strings.Contains(filename, ":") {
return errors.Errorf("invalid filename (should not contain ':') %q", filename)
}
return nil
}
// ValidURL checks a string urlStr is a url or not
func ValidURL(urlStr string) error {
url, err := url.ParseRequestURI(urlStr)
if err != nil {
return errors.Wrapf(err, "invalid url %q", urlStr)
}
if url.Scheme == "" {
return errors.Errorf("invalid url %q: missing scheme", urlStr)
}
return nil
}
|
