1965 lines
53 KiB
Go
1965 lines
53 KiB
Go
package common
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import (
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"fmt"
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"io"
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"log"
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"math"
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"net"
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"os"
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"reflect"
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"sort"
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"strconv"
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"strings"
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)
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type sentinelSignaller chan struct{}
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/** low-level parsing */
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// strip the comments and extraneous newlines from a byte channel
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func uncomment(eof sentinelSignaller, in <-chan byte) (chan byte, sentinelSignaller) {
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out := make(chan byte)
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eoc := make(sentinelSignaller)
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go func(in <-chan byte, out chan byte) {
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var endofline bool
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for stillReading := true; stillReading; {
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select {
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case <-eof:
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stillReading = false
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case ch := <-in:
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switch ch {
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case '#':
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endofline = true
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case '\n':
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if endofline {
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endofline = false
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}
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}
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if !endofline {
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out <- ch
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}
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}
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}
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close(eoc)
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}(in, out)
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return out, eoc
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}
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// convert a byte channel into a channel of pseudo-tokens
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func tokenizeDhcpConfig(eof sentinelSignaller, in chan byte) (chan string, sentinelSignaller) {
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var ch byte
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var state string
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var quote bool
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eot := make(sentinelSignaller)
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out := make(chan string)
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go func(out chan string) {
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for stillReading := true; stillReading; {
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select {
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case <-eof:
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stillReading = false
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case ch = <-in:
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if quote {
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if ch == '"' {
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out <- state + string(ch)
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state, quote = "", false
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continue
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}
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state += string(ch)
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continue
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}
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switch ch {
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case '"':
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quote = true
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state += string(ch)
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continue
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case '\r':
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fallthrough
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case '\n':
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fallthrough
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case '\t':
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fallthrough
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case ' ':
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if len(state) == 0 {
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continue
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}
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out <- state
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state = ""
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case '{':
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fallthrough
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case '}':
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fallthrough
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case ';':
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if len(state) > 0 {
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out <- state
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}
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out <- string(ch)
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state = ""
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default:
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state += string(ch)
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}
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}
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}
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if len(state) > 0 {
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out <- state
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}
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close(eot)
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}(out)
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return out, eot
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}
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/** mid-level parsing */
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type tkParameter struct {
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name string
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operand []string
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}
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func (e *tkParameter) String() string {
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var values []string
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for _, val := range e.operand {
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values = append(values, val)
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}
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return fmt.Sprintf("%s [%s]", e.name, strings.Join(values, ","))
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}
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type tkGroup struct {
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parent *tkGroup
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id tkParameter
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groups []*tkGroup
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params []tkParameter
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}
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func (e *tkGroup) String() string {
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var id []string
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id = append(id, e.id.name)
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for _, val := range e.id.operand {
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id = append(id, val)
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}
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var config []string
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for _, val := range e.params {
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config = append(config, val.String())
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}
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return fmt.Sprintf("%s {\n%s\n}", strings.Join(id, " "), strings.Join(config, "\n"))
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}
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// convert a channel of pseudo-tokens into an tkParameter struct
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func parseTokenParameter(in chan string) tkParameter {
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var result tkParameter
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for {
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token := <-in
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if result.name == "" {
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result.name = token
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continue
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}
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switch token {
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case "{":
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fallthrough
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case "}":
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fallthrough
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case ";":
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goto leave
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default:
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result.operand = append(result.operand, token)
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}
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}
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leave:
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return result
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}
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// convert a channel of pseudo-tokens into an tkGroup tree */
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func parseDhcpConfig(eof sentinelSignaller, in chan string) (tkGroup, error) {
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var tokens []string
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var result tkGroup
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toParameter := func(tokens []string) tkParameter {
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out := make(chan string)
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go func(out chan string) {
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for _, v := range tokens {
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out <- v
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}
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out <- ";"
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}(out)
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return parseTokenParameter(out)
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}
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for stillReading, currentgroup := true, &result; stillReading; {
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select {
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case <-eof:
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stillReading = false
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case tk := <-in:
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switch tk {
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case "{":
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grp := &tkGroup{parent: currentgroup}
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grp.id = toParameter(tokens)
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currentgroup.groups = append(currentgroup.groups, grp)
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currentgroup = grp
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case "}":
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if currentgroup.parent == nil {
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return tkGroup{}, fmt.Errorf("Unable to close the global declaration")
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}
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if len(tokens) > 0 {
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return tkGroup{}, fmt.Errorf("List of tokens was left unterminated : %v", tokens)
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}
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currentgroup = currentgroup.parent
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case ";":
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arg := toParameter(tokens)
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currentgroup.params = append(currentgroup.params, arg)
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default:
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tokens = append(tokens, tk)
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continue
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}
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tokens = []string{}
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}
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}
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return result, nil
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}
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func tokenizeNetworkMapConfig(eof sentinelSignaller, in chan byte) (chan string, sentinelSignaller) {
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var ch byte
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var state string
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var quote bool
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var lastnewline bool
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eot := make(sentinelSignaller)
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out := make(chan string)
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go func(out chan string) {
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for stillReading := true; stillReading; {
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select {
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case <-eof:
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stillReading = false
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case ch = <-in:
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if quote {
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if ch == '"' {
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out <- state + string(ch)
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state, quote = "", false
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continue
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}
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state += string(ch)
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continue
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}
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switch ch {
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case '"':
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quote = true
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state += string(ch)
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continue
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case '\r':
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fallthrough
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case '\t':
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fallthrough
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case ' ':
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if len(state) == 0 {
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continue
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}
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out <- state
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state = ""
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case '\n':
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if lastnewline {
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continue
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}
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if len(state) > 0 {
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out <- state
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}
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out <- string(ch)
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state = ""
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lastnewline = true
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continue
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case '.':
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fallthrough
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case '=':
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if len(state) > 0 {
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out <- state
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}
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out <- string(ch)
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state = ""
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default:
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state += string(ch)
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}
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lastnewline = false
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}
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}
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if len(state) > 0 {
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out <- state
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}
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close(eot)
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}(out)
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return out, eot
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}
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func parseNetworkMapConfig(eof sentinelSignaller, in chan string) (NetworkMap, error) {
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var unsorted map[string]map[string]string
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var state []string
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addResult := func(network string, attribute string, value string) error {
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_, ok := unsorted[network]
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if !ok {
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unsorted[network] = make(map[string]string)
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}
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val, err := strconv.Unquote(value)
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if err != nil {
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return err
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}
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current := unsorted[network]
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current[attribute] = val
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return nil
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}
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stillReading := true
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for unsorted = make(map[string]map[string]string); stillReading; {
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select {
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case <-eof:
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if len(state) == 3 {
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err := addResult(state[0], state[1], state[2])
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if err != nil {
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return nil, err
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}
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}
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stillReading = false
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case tk := <-in:
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switch tk {
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case ".":
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if len(state) != 1 {
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return nil, fmt.Errorf("Missing network index")
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}
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case "=":
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if len(state) != 2 {
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return nil, fmt.Errorf("Assignment to empty attribute")
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}
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case "\n":
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if len(state) == 0 {
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continue
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}
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if len(state) != 3 {
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return nil, fmt.Errorf("Invalid attribute assignment : %v", state)
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}
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err := addResult(state[0], state[1], state[2])
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if err != nil {
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return nil, err
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}
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state = make([]string, 0)
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default:
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state = append(state, tk)
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}
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}
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}
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result := make([]map[string]string, 0)
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var keys []string
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for k := range unsorted {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for _, k := range keys {
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result = append(result, unsorted[k])
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}
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return result, nil
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}
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/** higher-level parsing */
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/// parameters
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type pParameter interface {
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repr() string
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}
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type pParameterInclude struct {
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filename string
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}
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func (e pParameterInclude) repr() string { return fmt.Sprintf("include-file:filename=%s", e.filename) }
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type pParameterOption struct {
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name string
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value string
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}
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func (e pParameterOption) repr() string { return fmt.Sprintf("option:%s=%s", e.name, e.value) }
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// allow some-kind-of-something
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type pParameterGrant struct {
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verb string // allow,deny,ignore
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attribute string
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}
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func (e pParameterGrant) repr() string { return fmt.Sprintf("grant:%s,%s", e.verb, e.attribute) }
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type pParameterAddress4 []string
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func (e pParameterAddress4) repr() string {
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return fmt.Sprintf("fixed-address4:%s", strings.Join(e, ","))
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}
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type pParameterAddress6 []string
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func (e pParameterAddress6) repr() string {
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return fmt.Sprintf("fixed-address6:%s", strings.Join(e, ","))
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}
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// hardware address 00:00:00:00:00:00
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type pParameterHardware struct {
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class string
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address []byte
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}
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func (e pParameterHardware) repr() string {
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res := make([]string, 0)
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for _, v := range e.address {
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res = append(res, fmt.Sprintf("%02x", v))
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}
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return fmt.Sprintf("hardware-address:%s[%s]", e.class, strings.Join(res, ":"))
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}
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type pParameterBoolean struct {
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parameter string
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truancy bool
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}
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func (e pParameterBoolean) repr() string { return fmt.Sprintf("boolean:%s=%v", e.parameter, e.truancy) }
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type pParameterClientMatch struct {
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name string
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data string
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}
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func (e pParameterClientMatch) repr() string { return fmt.Sprintf("match-client:%s=%s", e.name, e.data) }
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// range 127.0.0.1 127.0.0.255
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type pParameterRange4 struct {
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min net.IP
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max net.IP
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}
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func (e pParameterRange4) repr() string {
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return fmt.Sprintf("range4:%s-%s", e.min.String(), e.max.String())
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}
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type pParameterRange6 struct {
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min net.IP
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max net.IP
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}
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func (e pParameterRange6) repr() string {
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return fmt.Sprintf("range6:%s-%s", e.min.String(), e.max.String())
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}
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type pParameterPrefix6 struct {
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min net.IP
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max net.IP
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bits int
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}
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func (e pParameterPrefix6) repr() string {
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return fmt.Sprintf("prefix6:/%d:%s-%s", e.bits, e.min.String(), e.max.String())
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}
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// some-kind-of-parameter 1024
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type pParameterOther struct {
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parameter string
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value string
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}
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func (e pParameterOther) repr() string { return fmt.Sprintf("parameter:%s=%s", e.parameter, e.value) }
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type pParameterExpression struct {
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parameter string
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expression string
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}
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func (e pParameterExpression) repr() string {
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return fmt.Sprintf("parameter-expression:%s=\"%s\"", e.parameter, e.expression)
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}
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type pDeclarationIdentifier interface {
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repr() string
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}
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type pDeclaration struct {
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id pDeclarationIdentifier
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parent *pDeclaration
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parameters []pParameter
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declarations []pDeclaration
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}
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func (e *pDeclaration) short() string {
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return e.id.repr()
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}
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func (e *pDeclaration) repr() string {
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res := e.short()
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var parameters []string
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for _, v := range e.parameters {
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parameters = append(parameters, v.repr())
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}
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var groups []string
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for _, v := range e.declarations {
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groups = append(groups, fmt.Sprintf("-> %s", v.short()))
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}
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if e.parent != nil {
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res = fmt.Sprintf("%s parent:%s", res, e.parent.short())
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}
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return fmt.Sprintf("%s\n%s\n%s\n", res, strings.Join(parameters, "\n"), strings.Join(groups, "\n"))
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}
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type pDeclarationGlobal struct{}
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func (e pDeclarationGlobal) repr() string { return fmt.Sprintf("{global}") }
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type pDeclarationShared struct{ name string }
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func (e pDeclarationShared) repr() string { return fmt.Sprintf("{shared-network %s}", e.name) }
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type pDeclarationSubnet4 struct{ net.IPNet }
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func (e pDeclarationSubnet4) repr() string { return fmt.Sprintf("{subnet4 %s}", e.String()) }
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type pDeclarationSubnet6 struct{ net.IPNet }
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func (e pDeclarationSubnet6) repr() string { return fmt.Sprintf("{subnet6 %s}", e.String()) }
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type pDeclarationHost struct{ name string }
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func (e pDeclarationHost) repr() string { return fmt.Sprintf("{host name:%s}", e.name) }
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type pDeclarationPool struct{}
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func (e pDeclarationPool) repr() string { return fmt.Sprintf("{pool}") }
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type pDeclarationGroup struct{}
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func (e pDeclarationGroup) repr() string { return fmt.Sprintf("{group}") }
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type pDeclarationClass struct{ name string }
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func (e pDeclarationClass) repr() string { return fmt.Sprintf("{class}") }
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/** parsers */
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func parseParameter(val tkParameter) (pParameter, error) {
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switch val.name {
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case "include":
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if len(val.operand) != 2 {
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return nil, fmt.Errorf("Invalid number of parameters for pParameterInclude : %v", val.operand)
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}
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name := val.operand[0]
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return pParameterInclude{filename: name}, nil
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case "option":
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if len(val.operand) != 2 {
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return nil, fmt.Errorf("Invalid number of parameters for pParameterOption : %v", val.operand)
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}
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name, value := val.operand[0], val.operand[1]
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return pParameterOption{name: name, value: value}, nil
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case "allow":
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fallthrough
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case "deny":
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fallthrough
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case "ignore":
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if len(val.operand) < 1 {
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return nil, fmt.Errorf("Invalid number of parameters for pParameterGrant : %v", val.operand)
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}
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attribute := strings.Join(val.operand, " ")
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return pParameterGrant{verb: strings.ToLower(val.name), attribute: attribute}, nil
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case "range":
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if len(val.operand) < 1 {
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return nil, fmt.Errorf("Invalid number of parameters for pParameterRange4 : %v", val.operand)
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}
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idxAddress := map[bool]int{true: 1, false: 0}[strings.ToLower(val.operand[0]) == "bootp"]
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if len(val.operand) > 2+idxAddress {
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return nil, fmt.Errorf("Invalid number of parameters for pParameterRange : %v", val.operand)
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}
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if idxAddress+1 > len(val.operand) {
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res := net.ParseIP(val.operand[idxAddress])
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return pParameterRange4{min: res, max: res}, nil
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}
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addr1 := net.ParseIP(val.operand[idxAddress])
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addr2 := net.ParseIP(val.operand[idxAddress+1])
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return pParameterRange4{min: addr1, max: addr2}, nil
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case "range6":
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if len(val.operand) == 1 {
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address := val.operand[0]
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if strings.Contains(address, "/") {
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cidr := strings.SplitN(address, "/", 2)
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if len(cidr) != 2 {
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return nil, fmt.Errorf("Unknown ipv6 format : %v", address)
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}
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address := net.ParseIP(cidr[0])
|
|
bits, err := strconv.Atoi(cidr[1])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
mask := net.CIDRMask(bits, net.IPv6len*8)
|
|
|
|
// figure out the network address
|
|
network := address.Mask(mask)
|
|
|
|
// make a broadcast address
|
|
broadcast := network
|
|
networkSize, totalSize := mask.Size()
|
|
hostSize := totalSize - networkSize
|
|
for i := networkSize / 8; i < totalSize/8; i++ {
|
|
broadcast[i] = byte(0xff)
|
|
}
|
|
octetIndex := network[networkSize/8]
|
|
bitsLeft := (uint32)(hostSize % 8)
|
|
broadcast[octetIndex] = network[octetIndex] | ((1 << bitsLeft) - 1)
|
|
|
|
// FIXME: check that the broadcast address was made correctly
|
|
return pParameterRange6{min: network, max: broadcast}, nil
|
|
}
|
|
res := net.ParseIP(address)
|
|
return pParameterRange6{min: res, max: res}, nil
|
|
}
|
|
if len(val.operand) == 2 {
|
|
addr := net.ParseIP(val.operand[0])
|
|
if strings.ToLower(val.operand[1]) == "temporary" {
|
|
return pParameterRange6{min: addr, max: addr}, nil
|
|
}
|
|
other := net.ParseIP(val.operand[1])
|
|
return pParameterRange6{min: addr, max: other}, nil
|
|
}
|
|
return nil, fmt.Errorf("Invalid number of parameters for pParameterRange6 : %v", val.operand)
|
|
|
|
case "prefix6":
|
|
if len(val.operand) != 3 {
|
|
return nil, fmt.Errorf("Invalid number of parameters for pParameterRange6 : %v", val.operand)
|
|
}
|
|
bits, err := strconv.Atoi(val.operand[2])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Invalid bits for pParameterPrefix6 : %v", val.operand[2])
|
|
}
|
|
minaddr := net.ParseIP(val.operand[0])
|
|
maxaddr := net.ParseIP(val.operand[1])
|
|
return pParameterPrefix6{min: minaddr, max: maxaddr, bits: bits}, nil
|
|
|
|
case "hardware":
|
|
if len(val.operand) != 2 {
|
|
return nil, fmt.Errorf("Invalid number of parameters for pParameterHardware : %v", val.operand)
|
|
}
|
|
class := val.operand[0]
|
|
octets := strings.Split(val.operand[1], ":")
|
|
address := make([]byte, 0)
|
|
for _, v := range octets {
|
|
b, err := strconv.ParseInt(v, 16, 0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
address = append(address, byte(b))
|
|
}
|
|
return pParameterHardware{class: class, address: address}, nil
|
|
|
|
case "fixed-address":
|
|
ip4addrs := make(pParameterAddress4, len(val.operand))
|
|
copy(ip4addrs, val.operand)
|
|
return ip4addrs, nil
|
|
|
|
case "fixed-address6":
|
|
ip6addrs := make(pParameterAddress6, len(val.operand))
|
|
copy(ip6addrs, val.operand)
|
|
return ip6addrs, nil
|
|
|
|
case "host-identifier":
|
|
if len(val.operand) != 3 {
|
|
return nil, fmt.Errorf("Invalid number of parameters for pParameterClientMatch : %v", val.operand)
|
|
}
|
|
if val.operand[0] != "option" {
|
|
return nil, fmt.Errorf("Invalid match parameter : %v", val.operand[0])
|
|
}
|
|
optionName := val.operand[1]
|
|
optionData := val.operand[2]
|
|
return pParameterClientMatch{name: optionName, data: optionData}, nil
|
|
|
|
default:
|
|
length := len(val.operand)
|
|
if length < 1 {
|
|
return pParameterBoolean{parameter: val.name, truancy: true}, nil
|
|
} else if length > 1 {
|
|
if val.operand[0] == "=" {
|
|
return pParameterExpression{parameter: val.name, expression: strings.Join(val.operand[1:], "")}, nil
|
|
}
|
|
}
|
|
if length != 1 {
|
|
return nil, fmt.Errorf("Invalid number of parameters for pParameterOther : %v", val.operand)
|
|
}
|
|
if strings.ToLower(val.name) == "not" {
|
|
return pParameterBoolean{parameter: val.operand[0], truancy: false}, nil
|
|
}
|
|
return pParameterOther{parameter: val.name, value: val.operand[0]}, nil
|
|
}
|
|
}
|
|
|
|
func parseTokenGroup(val tkGroup) (*pDeclaration, error) {
|
|
params := val.id.operand
|
|
switch val.id.name {
|
|
case "group":
|
|
return &pDeclaration{id: pDeclarationGroup{}}, nil
|
|
|
|
case "pool":
|
|
return &pDeclaration{id: pDeclarationPool{}}, nil
|
|
|
|
case "host":
|
|
if len(params) == 1 {
|
|
return &pDeclaration{id: pDeclarationHost{name: params[0]}}, nil
|
|
}
|
|
|
|
case "subnet":
|
|
if len(params) == 3 && strings.ToLower(params[1]) == "netmask" {
|
|
addr := make([]byte, 4)
|
|
for i, v := range strings.SplitN(params[2], ".", 4) {
|
|
res, err := strconv.ParseInt(v, 10, 0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
addr[i] = byte(res)
|
|
}
|
|
oc1, oc2, oc3, oc4 := addr[0], addr[1], addr[2], addr[3]
|
|
if subnet, mask := net.ParseIP(params[0]), net.IPv4Mask(oc1, oc2, oc3, oc4); subnet != nil && mask != nil {
|
|
return &pDeclaration{id: pDeclarationSubnet4{net.IPNet{IP: subnet, Mask: mask}}}, nil
|
|
}
|
|
}
|
|
case "subnet6":
|
|
if len(params) == 1 {
|
|
ip6 := strings.SplitN(params[0], "/", 2)
|
|
if len(ip6) == 2 && strings.Contains(ip6[0], ":") {
|
|
address := net.ParseIP(ip6[0])
|
|
prefix, err := strconv.Atoi(ip6[1])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &pDeclaration{id: pDeclarationSubnet6{net.IPNet{IP: address, Mask: net.CIDRMask(prefix, net.IPv6len*8)}}}, nil
|
|
}
|
|
}
|
|
case "shared-network":
|
|
if len(params) == 1 {
|
|
return &pDeclaration{id: pDeclarationShared{name: params[0]}}, nil
|
|
}
|
|
case "":
|
|
return &pDeclaration{id: pDeclarationGlobal{}}, nil
|
|
}
|
|
return nil, fmt.Errorf("Invalid pDeclaration : %v : %v", val.id.name, params)
|
|
}
|
|
|
|
func flattenDhcpConfig(root tkGroup) (*pDeclaration, error) {
|
|
var result *pDeclaration
|
|
result, err := parseTokenGroup(root)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, p := range root.params {
|
|
param, err := parseParameter(p)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result.parameters = append(result.parameters, param)
|
|
}
|
|
for _, p := range root.groups {
|
|
group, err := flattenDhcpConfig(*p)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
group.parent = result
|
|
result.declarations = append(result.declarations, *group)
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
/** reduce the tree into the things that we care about */
|
|
type grant uint
|
|
|
|
const (
|
|
ALLOW grant = iota
|
|
IGNORE grant = iota
|
|
DENY grant = iota
|
|
)
|
|
|
|
type configDeclaration struct {
|
|
id []pDeclarationIdentifier
|
|
composites []pDeclaration
|
|
|
|
address []pParameter
|
|
|
|
options map[string]string
|
|
grants map[string]grant
|
|
attributes map[string]bool
|
|
parameters map[string]string
|
|
expressions map[string]string
|
|
|
|
hostid []pParameterClientMatch
|
|
}
|
|
|
|
func createDeclaration(node pDeclaration) configDeclaration {
|
|
var hierarchy []pDeclaration
|
|
|
|
for n := &node; n != nil; n = n.parent {
|
|
hierarchy = append(hierarchy, *n)
|
|
}
|
|
|
|
var result configDeclaration
|
|
result.address = make([]pParameter, 0)
|
|
|
|
result.options = make(map[string]string)
|
|
result.grants = make(map[string]grant)
|
|
result.attributes = make(map[string]bool)
|
|
result.parameters = make(map[string]string)
|
|
result.expressions = make(map[string]string)
|
|
|
|
result.hostid = make([]pParameterClientMatch, 0)
|
|
|
|
// walk from globals to pDeclaration collecting all parameters
|
|
for i := len(hierarchy) - 1; i >= 0; i-- {
|
|
result.composites = append(result.composites, hierarchy[(len(hierarchy)-1)-i])
|
|
result.id = append(result.id, hierarchy[(len(hierarchy)-1)-i].id)
|
|
|
|
// update configDeclaration parameters
|
|
for _, p := range hierarchy[i].parameters {
|
|
switch p.(type) {
|
|
case pParameterOption:
|
|
result.options[p.(pParameterOption).name] = p.(pParameterOption).value
|
|
case pParameterGrant:
|
|
Grant := map[string]grant{"ignore": IGNORE, "allow": ALLOW, "deny": DENY}
|
|
result.grants[p.(pParameterGrant).attribute] = Grant[p.(pParameterGrant).verb]
|
|
case pParameterBoolean:
|
|
result.attributes[p.(pParameterBoolean).parameter] = p.(pParameterBoolean).truancy
|
|
case pParameterClientMatch:
|
|
result.hostid = append(result.hostid, p.(pParameterClientMatch))
|
|
case pParameterExpression:
|
|
result.expressions[p.(pParameterExpression).parameter] = p.(pParameterExpression).expression
|
|
case pParameterOther:
|
|
result.parameters[p.(pParameterOther).parameter] = p.(pParameterOther).value
|
|
default:
|
|
result.address = append(result.address, p)
|
|
}
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (e *configDeclaration) repr() string {
|
|
var result []string
|
|
|
|
var res []string
|
|
|
|
res = make([]string, 0)
|
|
for _, v := range e.id {
|
|
res = append(res, v.repr())
|
|
}
|
|
result = append(result, strings.Join(res, ","))
|
|
|
|
if len(e.address) > 0 {
|
|
res = make([]string, 0)
|
|
for _, v := range e.address {
|
|
res = append(res, v.repr())
|
|
}
|
|
result = append(result, fmt.Sprintf("address : %v", strings.Join(res, ",")))
|
|
}
|
|
|
|
if len(e.options) > 0 {
|
|
result = append(result, fmt.Sprintf("options : %v", e.options))
|
|
}
|
|
if len(e.grants) > 0 {
|
|
result = append(result, fmt.Sprintf("grants : %v", e.grants))
|
|
}
|
|
if len(e.attributes) > 0 {
|
|
result = append(result, fmt.Sprintf("attributes : %v", e.attributes))
|
|
}
|
|
if len(e.parameters) > 0 {
|
|
result = append(result, fmt.Sprintf("parameters : %v", e.parameters))
|
|
}
|
|
if len(e.expressions) > 0 {
|
|
result = append(result, fmt.Sprintf("parameter-expressions : %v", e.expressions))
|
|
}
|
|
|
|
if len(e.hostid) > 0 {
|
|
res = make([]string, 0)
|
|
for _, v := range e.hostid {
|
|
res = append(res, v.repr())
|
|
}
|
|
result = append(result, fmt.Sprintf("hostid : %v", strings.Join(res, " ")))
|
|
}
|
|
return strings.Join(result, "\n") + "\n"
|
|
}
|
|
|
|
func (e *configDeclaration) IP4() (net.IP, error) {
|
|
var result []string
|
|
for _, entry := range e.address {
|
|
switch entry.(type) {
|
|
case pParameterAddress4:
|
|
for _, s := range entry.(pParameterAddress4) {
|
|
result = append(result, s)
|
|
}
|
|
}
|
|
}
|
|
if len(result) > 1 {
|
|
return nil, fmt.Errorf("More than one address4 returned : %v", result)
|
|
} else if len(result) == 0 {
|
|
return nil, fmt.Errorf("No IP4 addresses found")
|
|
}
|
|
|
|
if res := net.ParseIP(result[0]); res != nil {
|
|
return res, nil
|
|
}
|
|
res, err := net.ResolveIPAddr("ip4", result[0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return res.IP, nil
|
|
}
|
|
func (e *configDeclaration) IP6() (net.IP, error) {
|
|
var result []string
|
|
for _, entry := range e.address {
|
|
switch entry.(type) {
|
|
case pParameterAddress6:
|
|
for _, s := range entry.(pParameterAddress6) {
|
|
result = append(result, s)
|
|
}
|
|
}
|
|
}
|
|
if len(result) > 1 {
|
|
return nil, fmt.Errorf("More than one address6 returned : %v", result)
|
|
} else if len(result) == 0 {
|
|
return nil, fmt.Errorf("No IP6 addresses found")
|
|
}
|
|
|
|
if res := net.ParseIP(result[0]); res != nil {
|
|
return res, nil
|
|
}
|
|
res, err := net.ResolveIPAddr("ip6", result[0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return res.IP, nil
|
|
}
|
|
func (e *configDeclaration) Hardware() (net.HardwareAddr, error) {
|
|
var result []pParameterHardware
|
|
for _, addr := range e.address {
|
|
switch addr.(type) {
|
|
case pParameterHardware:
|
|
result = append(result, addr.(pParameterHardware))
|
|
}
|
|
}
|
|
if len(result) > 0 {
|
|
return nil, fmt.Errorf("More than one hardware address returned : %v", result)
|
|
}
|
|
res := make(net.HardwareAddr, 0)
|
|
for _, by := range result[0].address {
|
|
res = append(res, by)
|
|
}
|
|
return res, nil
|
|
}
|
|
|
|
/*** Dhcp Configuration */
|
|
type DhcpConfiguration []configDeclaration
|
|
|
|
func ReadDhcpConfiguration(fd *os.File) (DhcpConfiguration, error) {
|
|
fromfile, eof := consumeFile(fd)
|
|
uncommented, eoc := uncomment(eof, fromfile)
|
|
tokenized, eot := tokenizeDhcpConfig(eoc, uncommented)
|
|
parsetree, err := parseDhcpConfig(eot, tokenized)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
global, err := flattenDhcpConfig(parsetree)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var walkDeclarations func(root pDeclaration, out chan *configDeclaration)
|
|
walkDeclarations = func(root pDeclaration, out chan *configDeclaration) {
|
|
res := createDeclaration(root)
|
|
out <- &res
|
|
for _, p := range root.declarations {
|
|
walkDeclarations(p, out)
|
|
}
|
|
}
|
|
|
|
each := make(chan *configDeclaration)
|
|
go func(out chan *configDeclaration) {
|
|
walkDeclarations(*global, out)
|
|
out <- nil
|
|
}(each)
|
|
|
|
var result DhcpConfiguration
|
|
for decl := <-each; decl != nil; decl = <-each {
|
|
result = append(result, *decl)
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func (e *DhcpConfiguration) Global() configDeclaration {
|
|
result := (*e)[0]
|
|
if len(result.id) != 1 {
|
|
panic(fmt.Errorf("Something that can't happen happened"))
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (e *DhcpConfiguration) SubnetByAddress(address net.IP) (configDeclaration, error) {
|
|
var result []configDeclaration
|
|
for _, entry := range *e {
|
|
switch entry.id[0].(type) {
|
|
case pDeclarationSubnet4:
|
|
id := entry.id[0].(pDeclarationSubnet4)
|
|
if id.Contains(address) {
|
|
result = append(result, entry)
|
|
}
|
|
case pDeclarationSubnet6:
|
|
id := entry.id[0].(pDeclarationSubnet6)
|
|
if id.Contains(address) {
|
|
result = append(result, entry)
|
|
}
|
|
}
|
|
}
|
|
if len(result) == 0 {
|
|
return configDeclaration{}, fmt.Errorf("No network declarations containing %s found", address.String())
|
|
}
|
|
if len(result) > 1 {
|
|
return configDeclaration{}, fmt.Errorf("More than 1 network declaration found : %v", result)
|
|
}
|
|
return result[0], nil
|
|
}
|
|
|
|
func (e *DhcpConfiguration) HostByName(host string) (configDeclaration, error) {
|
|
var result []configDeclaration
|
|
for _, entry := range *e {
|
|
switch entry.id[0].(type) {
|
|
case pDeclarationHost:
|
|
id := entry.id[0].(pDeclarationHost)
|
|
if strings.ToLower(id.name) == strings.ToLower(host) {
|
|
result = append(result, entry)
|
|
}
|
|
}
|
|
}
|
|
if len(result) == 0 {
|
|
return configDeclaration{}, fmt.Errorf("No host declarations containing %s found", host)
|
|
}
|
|
if len(result) > 1 {
|
|
return configDeclaration{}, fmt.Errorf("More than 1 host declaration found : %v", result)
|
|
}
|
|
return result[0], nil
|
|
}
|
|
|
|
/*** Network Map */
|
|
type NetworkMap []map[string]string
|
|
|
|
type NetworkNameMapper interface {
|
|
NameIntoDevice(string) (string, error)
|
|
DeviceIntoName(string) (string, error)
|
|
}
|
|
|
|
func ReadNetworkMap(fd *os.File) (NetworkMap, error) {
|
|
|
|
fromfile, eof := consumeFile(fd)
|
|
uncommented, eoc := uncomment(eof, fromfile)
|
|
tokenized, eot := tokenizeNetworkMapConfig(eoc, uncommented)
|
|
|
|
result, err := parseNetworkMapConfig(eot, tokenized)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func (e NetworkMap) NameIntoDevice(name string) (string, error) {
|
|
for _, val := range e {
|
|
if strings.ToLower(val["name"]) == strings.ToLower(name) {
|
|
return val["device"], nil
|
|
}
|
|
}
|
|
return "", fmt.Errorf("Network name not found : %v", name)
|
|
}
|
|
func (e NetworkMap) DeviceIntoName(device string) (string, error) {
|
|
for _, val := range e {
|
|
if strings.ToLower(val["device"]) == strings.ToLower(device) {
|
|
return val["name"], nil
|
|
}
|
|
}
|
|
return "", fmt.Errorf("Device name not found : %v", device)
|
|
}
|
|
func (e *NetworkMap) repr() string {
|
|
var result []string
|
|
for idx, val := range *e {
|
|
result = append(result, fmt.Sprintf("network%d.name = \"%s\"", idx, val["name"]))
|
|
result = append(result, fmt.Sprintf("network%d.device = \"%s\"", idx, val["device"]))
|
|
}
|
|
return strings.Join(result, "\n")
|
|
}
|
|
|
|
/*** parser for VMware Fusion's networking file */
|
|
func tokenizeNetworkingConfig(eof sentinelSignaller, in chan byte) (chan string, sentinelSignaller) {
|
|
var ch byte
|
|
var state string
|
|
var repeat_newline bool
|
|
|
|
eot := make(sentinelSignaller)
|
|
|
|
out := make(chan string)
|
|
go func(out chan string) {
|
|
for reading := true; reading; {
|
|
select {
|
|
case <-eof:
|
|
reading = false
|
|
|
|
case ch = <-in:
|
|
switch ch {
|
|
case '\r':
|
|
fallthrough
|
|
case '\t':
|
|
fallthrough
|
|
case ' ':
|
|
if len(state) == 0 {
|
|
continue
|
|
}
|
|
out <- state
|
|
state = ""
|
|
case '\n':
|
|
if repeat_newline {
|
|
continue
|
|
}
|
|
if len(state) > 0 {
|
|
out <- state
|
|
}
|
|
out <- string(ch)
|
|
state = ""
|
|
repeat_newline = true
|
|
continue
|
|
default:
|
|
state += string(ch)
|
|
}
|
|
repeat_newline = false
|
|
}
|
|
}
|
|
if len(state) > 0 {
|
|
out <- state
|
|
}
|
|
close(eot)
|
|
}(out)
|
|
return out, eot
|
|
}
|
|
|
|
func splitNetworkingConfig(eof sentinelSignaller, in chan string) (chan []string, sentinelSignaller) {
|
|
var out chan []string
|
|
|
|
eos := make(sentinelSignaller)
|
|
|
|
out = make(chan []string)
|
|
go func(out chan []string) {
|
|
row := make([]string, 0)
|
|
for reading := true; reading; {
|
|
select {
|
|
case <-eof:
|
|
reading = false
|
|
|
|
case tk := <-in:
|
|
switch tk {
|
|
case "\n":
|
|
if len(row) > 0 {
|
|
out <- row
|
|
}
|
|
row = make([]string, 0)
|
|
default:
|
|
row = append(row, tk)
|
|
}
|
|
}
|
|
}
|
|
if len(row) > 0 {
|
|
out <- row
|
|
}
|
|
close(eos)
|
|
}(out)
|
|
return out, eos
|
|
}
|
|
|
|
/// All token types in networking file.
|
|
// VERSION token
|
|
type networkingVERSION struct {
|
|
value string
|
|
}
|
|
|
|
func networkingReadVersion(row []string) (*networkingVERSION, error) {
|
|
if len(row) != 1 {
|
|
return nil, fmt.Errorf("Unexpected format for VERSION entry : %v", row)
|
|
}
|
|
res := &networkingVERSION{value: row[0]}
|
|
if !res.Valid() {
|
|
return nil, fmt.Errorf("Unexpected format for VERSION entry : %v", row)
|
|
}
|
|
return res, nil
|
|
}
|
|
|
|
func (s networkingVERSION) Repr() string {
|
|
if !s.Valid() {
|
|
return fmt.Sprintf("VERSION{INVALID=\"%v\"}", s.value)
|
|
}
|
|
return fmt.Sprintf("VERSION{%f}", s.Number())
|
|
}
|
|
|
|
func (s networkingVERSION) Valid() bool {
|
|
tokens := strings.SplitN(s.value, "=", 2)
|
|
if len(tokens) != 2 || tokens[0] != "VERSION" {
|
|
return false
|
|
}
|
|
|
|
tokens = strings.Split(tokens[1], ",")
|
|
if len(tokens) != 2 {
|
|
return false
|
|
}
|
|
|
|
for _, t := range tokens {
|
|
_, err := strconv.ParseUint(t, 10, 64)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (s networkingVERSION) Number() float64 {
|
|
var result float64
|
|
tokens := strings.SplitN(s.value, "=", 2)
|
|
tokens = strings.Split(tokens[1], ",")
|
|
|
|
integer, err := strconv.ParseUint(tokens[0], 10, 64)
|
|
if err != nil {
|
|
integer = 0
|
|
}
|
|
result = float64(integer)
|
|
|
|
mantissa, err := strconv.ParseUint(tokens[1], 10, 64)
|
|
if err != nil {
|
|
return result
|
|
}
|
|
denomination := math.Pow(10.0, float64(len(tokens[1])))
|
|
return result + (float64(mantissa) / denomination)
|
|
}
|
|
|
|
// VNET_X token
|
|
type networkingVNET struct {
|
|
value string
|
|
}
|
|
|
|
func (s networkingVNET) Valid() bool {
|
|
if strings.ToUpper(s.value) != s.value {
|
|
return false
|
|
}
|
|
tokens := strings.SplitN(s.value, "_", 3)
|
|
if len(tokens) != 3 || tokens[0] != "VNET" {
|
|
return false
|
|
}
|
|
_, err := strconv.ParseUint(tokens[1], 10, 64)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (s networkingVNET) Number() int {
|
|
tokens := strings.SplitN(s.value, "_", 3)
|
|
res, err := strconv.Atoi(tokens[1])
|
|
if err != nil {
|
|
return ^int(0)
|
|
}
|
|
return res
|
|
}
|
|
|
|
func (s networkingVNET) Option() string {
|
|
tokens := strings.SplitN(s.value, "_", 3)
|
|
if len(tokens) == 3 {
|
|
return tokens[2]
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func (s networkingVNET) Repr() string {
|
|
if !s.Valid() {
|
|
tokens := strings.SplitN(s.value, "_", 3)
|
|
return fmt.Sprintf("VNET{INVALID=%v}", tokens)
|
|
}
|
|
return fmt.Sprintf("VNET{%d} %s", s.Number(), s.Option())
|
|
}
|
|
|
|
// Interface name
|
|
type networkingInterface struct {
|
|
name string
|
|
}
|
|
|
|
func (s networkingInterface) Interface() (*net.Interface, error) {
|
|
return net.InterfaceByName(s.name)
|
|
}
|
|
|
|
// networking command entry types
|
|
type networkingCommandEntry_answer struct {
|
|
vnet networkingVNET
|
|
value string
|
|
}
|
|
type networkingCommandEntry_remove_answer struct {
|
|
vnet networkingVNET
|
|
}
|
|
type networkingCommandEntry_add_nat_portfwd struct {
|
|
vnet int
|
|
protocol string
|
|
port int
|
|
target_host net.IP
|
|
target_port int
|
|
}
|
|
type networkingCommandEntry_remove_nat_portfwd struct {
|
|
vnet int
|
|
protocol string
|
|
port int
|
|
}
|
|
type networkingCommandEntry_add_dhcp_mac_to_ip struct {
|
|
vnet int
|
|
mac net.HardwareAddr
|
|
ip net.IP
|
|
}
|
|
type networkingCommandEntry_remove_dhcp_mac_to_ip struct {
|
|
vnet int
|
|
mac net.HardwareAddr
|
|
}
|
|
type networkingCommandEntry_add_bridge_mapping struct {
|
|
intf networkingInterface
|
|
vnet int
|
|
}
|
|
type networkingCommandEntry_remove_bridge_mapping struct {
|
|
intf networkingInterface
|
|
}
|
|
type networkingCommandEntry_add_nat_prefix struct {
|
|
vnet int
|
|
prefix int
|
|
}
|
|
type networkingCommandEntry_remove_nat_prefix struct {
|
|
vnet int
|
|
prefix int
|
|
}
|
|
|
|
type networkingCommandEntry struct {
|
|
entry interface{}
|
|
answer *networkingCommandEntry_answer
|
|
remove_answer *networkingCommandEntry_remove_answer
|
|
add_nat_portfwd *networkingCommandEntry_add_nat_portfwd
|
|
remove_nat_portfwd *networkingCommandEntry_remove_nat_portfwd
|
|
add_dhcp_mac_to_ip *networkingCommandEntry_add_dhcp_mac_to_ip
|
|
remove_dhcp_mac_to_ip *networkingCommandEntry_remove_dhcp_mac_to_ip
|
|
add_bridge_mapping *networkingCommandEntry_add_bridge_mapping
|
|
remove_bridge_mapping *networkingCommandEntry_remove_bridge_mapping
|
|
add_nat_prefix *networkingCommandEntry_add_nat_prefix
|
|
remove_nat_prefix *networkingCommandEntry_remove_nat_prefix
|
|
}
|
|
|
|
func (e networkingCommandEntry) Name() string {
|
|
switch e.entry.(type) {
|
|
case networkingCommandEntry_answer:
|
|
return "answer"
|
|
case networkingCommandEntry_remove_answer:
|
|
return "remove_answer"
|
|
case networkingCommandEntry_add_nat_portfwd:
|
|
return "add_nat_portfwd"
|
|
case networkingCommandEntry_remove_nat_portfwd:
|
|
return "remove_nat_portfwd"
|
|
case networkingCommandEntry_add_dhcp_mac_to_ip:
|
|
return "add_dhcp_mac_to_ip"
|
|
case networkingCommandEntry_remove_dhcp_mac_to_ip:
|
|
return "remove_dhcp_mac_to_ip"
|
|
case networkingCommandEntry_add_bridge_mapping:
|
|
return "add_bridge_mapping"
|
|
case networkingCommandEntry_remove_bridge_mapping:
|
|
return "remove_bridge_mapping"
|
|
case networkingCommandEntry_add_nat_prefix:
|
|
return "add_nat_prefix"
|
|
case networkingCommandEntry_remove_nat_prefix:
|
|
return "remove_nat_prefix"
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func (e networkingCommandEntry) Entry() reflect.Value {
|
|
this := reflect.ValueOf(e)
|
|
switch e.entry.(type) {
|
|
case networkingCommandEntry_answer:
|
|
return reflect.Indirect(this.FieldByName("answer"))
|
|
case networkingCommandEntry_remove_answer:
|
|
return reflect.Indirect(this.FieldByName("remove_answer"))
|
|
case networkingCommandEntry_add_nat_portfwd:
|
|
return reflect.Indirect(this.FieldByName("add_nat_portfwd"))
|
|
case networkingCommandEntry_remove_nat_portfwd:
|
|
return reflect.Indirect(this.FieldByName("remove_nat_portfwd"))
|
|
case networkingCommandEntry_add_dhcp_mac_to_ip:
|
|
return reflect.Indirect(this.FieldByName("add_dhcp_mac_to_ip"))
|
|
case networkingCommandEntry_remove_dhcp_mac_to_ip:
|
|
return reflect.Indirect(this.FieldByName("remove_dhcp_mac_to_ip"))
|
|
case networkingCommandEntry_add_bridge_mapping:
|
|
return reflect.Indirect(this.FieldByName("add_bridge_mapping"))
|
|
case networkingCommandEntry_remove_bridge_mapping:
|
|
return reflect.Indirect(this.FieldByName("remove_bridge_mapping"))
|
|
case networkingCommandEntry_add_nat_prefix:
|
|
return reflect.Indirect(this.FieldByName("add_nat_prefix"))
|
|
case networkingCommandEntry_remove_nat_prefix:
|
|
return reflect.Indirect(this.FieldByName("remove_nat_prefix"))
|
|
}
|
|
return reflect.Value{}
|
|
}
|
|
|
|
func (e networkingCommandEntry) Repr() string {
|
|
var result map[string]interface{}
|
|
result = make(map[string]interface{})
|
|
|
|
entryN, entry := e.Name(), e.Entry()
|
|
entryT := entry.Type()
|
|
for i := 0; i < entry.NumField(); i++ {
|
|
fld, fldT := entry.Field(i), entryT.Field(i)
|
|
result[fldT.Name] = fld
|
|
}
|
|
return fmt.Sprintf("%s -> %v", entryN, result)
|
|
}
|
|
|
|
// networking command entry parsers
|
|
func parseNetworkingCommand_answer(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 2 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 2, len(row))
|
|
}
|
|
vnet := networkingVNET{value: row[0]}
|
|
if !vnet.Valid() {
|
|
return nil, fmt.Errorf("Invalid format for VNET.")
|
|
}
|
|
value := row[1]
|
|
|
|
result := networkingCommandEntry_answer{vnet: vnet, value: value}
|
|
return &networkingCommandEntry{entry: result, answer: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_remove_answer(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 1 {
|
|
return nil, fmt.Errorf("Expected %d argument. Received %d.", 1, len(row))
|
|
}
|
|
vnet := networkingVNET{value: row[0]}
|
|
if !vnet.Valid() {
|
|
return nil, fmt.Errorf("Invalid format for VNET.")
|
|
}
|
|
|
|
result := networkingCommandEntry_remove_answer{vnet: vnet}
|
|
return &networkingCommandEntry{entry: result, remove_answer: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_add_nat_portfwd(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 5 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 5, len(row))
|
|
}
|
|
|
|
vnet, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
|
|
protocol := strings.ToLower(row[1])
|
|
if !(protocol == "tcp" || protocol == "udp") {
|
|
return nil, fmt.Errorf("Expected \"tcp\" or \"udp\" for second argument. : %v", row[1])
|
|
}
|
|
|
|
sport, err := strconv.Atoi(row[2])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse third argument as an integer. : %v", row[2])
|
|
}
|
|
|
|
dest := net.ParseIP(row[3])
|
|
if dest == nil {
|
|
return nil, fmt.Errorf("Unable to parse fourth argument as an IPv4 address. : %v", row[2])
|
|
}
|
|
|
|
dport, err := strconv.Atoi(row[4])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse fifth argument as an integer. : %v", row[4])
|
|
}
|
|
|
|
result := networkingCommandEntry_add_nat_portfwd{vnet: vnet - 1, protocol: protocol, port: sport, target_host: dest, target_port: dport}
|
|
return &networkingCommandEntry{entry: result, add_nat_portfwd: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_remove_nat_portfwd(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 3 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 3, len(row))
|
|
}
|
|
|
|
vnet, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
|
|
protocol := strings.ToLower(row[1])
|
|
if !(protocol == "tcp" || protocol == "udp") {
|
|
return nil, fmt.Errorf("Expected \"tcp\" or \"udp\" for second argument. : %v", row[1])
|
|
}
|
|
|
|
sport, err := strconv.Atoi(row[2])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse third argument as an integer. : %v", row[2])
|
|
}
|
|
|
|
result := networkingCommandEntry_remove_nat_portfwd{vnet: vnet - 1, protocol: protocol, port: sport}
|
|
return &networkingCommandEntry{entry: result, remove_nat_portfwd: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_add_dhcp_mac_to_ip(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 3 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 3, len(row))
|
|
}
|
|
|
|
vnet, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
|
|
mac, err := net.ParseMAC(row[1])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse second argument as hwaddr. : %v", row[1])
|
|
}
|
|
|
|
ip := net.ParseIP(row[2])
|
|
if ip != nil {
|
|
return nil, fmt.Errorf("Unable to parse third argument as ipv4. : %v", row[2])
|
|
}
|
|
|
|
result := networkingCommandEntry_add_dhcp_mac_to_ip{vnet: vnet - 1, mac: mac, ip: ip}
|
|
return &networkingCommandEntry{entry: result, add_dhcp_mac_to_ip: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_remove_dhcp_mac_to_ip(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 2 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 2, len(row))
|
|
}
|
|
|
|
vnet, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
|
|
mac, err := net.ParseMAC(row[1])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse second argument as hwaddr. : %v", row[1])
|
|
}
|
|
|
|
result := networkingCommandEntry_remove_dhcp_mac_to_ip{vnet: vnet - 1, mac: mac}
|
|
return &networkingCommandEntry{entry: result, remove_dhcp_mac_to_ip: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_add_bridge_mapping(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 2 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 2, len(row))
|
|
}
|
|
intf := networkingInterface{name: row[0]}
|
|
|
|
vnet, err := strconv.Atoi(row[1])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse second argument as an integer. : %v", row[2])
|
|
}
|
|
|
|
result := networkingCommandEntry_add_bridge_mapping{intf: intf, vnet: vnet - 1}
|
|
return &networkingCommandEntry{entry: result, add_bridge_mapping: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_remove_bridge_mapping(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 1 {
|
|
return nil, fmt.Errorf("Expected %d argument. Received %d.", 1, len(row))
|
|
}
|
|
intf := networkingInterface{name: row[0]}
|
|
/*
|
|
number, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
*/
|
|
result := networkingCommandEntry_remove_bridge_mapping{intf: intf}
|
|
return &networkingCommandEntry{entry: result, remove_bridge_mapping: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_add_nat_prefix(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 2 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 2, len(row))
|
|
}
|
|
|
|
vnet, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
|
|
if !strings.HasPrefix(row[1], "/") {
|
|
return nil, fmt.Errorf("Expected second argument to begin with \"/\". : %v", row[1])
|
|
}
|
|
|
|
prefix, err := strconv.Atoi(row[1][1:])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse prefix out of second argument. : %v", row[1])
|
|
}
|
|
|
|
result := networkingCommandEntry_add_nat_prefix{vnet: vnet - 1, prefix: prefix}
|
|
return &networkingCommandEntry{entry: result, add_nat_prefix: &result}, nil
|
|
}
|
|
func parseNetworkingCommand_remove_nat_prefix(row []string) (*networkingCommandEntry, error) {
|
|
if len(row) != 2 {
|
|
return nil, fmt.Errorf("Expected %d arguments. Received only %d.", 2, len(row))
|
|
}
|
|
|
|
vnet, err := strconv.Atoi(row[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse first argument as an integer. : %v", row[0])
|
|
}
|
|
|
|
if !strings.HasPrefix(row[1], "/") {
|
|
return nil, fmt.Errorf("Expected second argument to begin with \"/\". : %v", row[1])
|
|
}
|
|
prefix, err := strconv.Atoi(row[1][1:])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Unable to parse prefix out of second argument. : %v", row[1])
|
|
}
|
|
|
|
result := networkingCommandEntry_remove_nat_prefix{vnet: vnet - 1, prefix: prefix}
|
|
return &networkingCommandEntry{entry: result, remove_nat_prefix: &result}, nil
|
|
}
|
|
|
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type networkingCommandParser struct {
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command string
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callback func([]string) (*networkingCommandEntry, error)
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}
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var NetworkingCommandParsers = []networkingCommandParser{
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/* DictRecordParseFunct */ {command: "answer", callback: parseNetworkingCommand_answer},
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/* DictRecordParseFunct */ {command: "remove_answer", callback: parseNetworkingCommand_remove_answer},
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/* NatFwdRecordParseFunct */ {command: "add_nat_portfwd", callback: parseNetworkingCommand_add_nat_portfwd},
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/* NatFwdRecordParseFunct */ {command: "remove_nat_portfwd", callback: parseNetworkingCommand_remove_nat_portfwd},
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/* DhcpMacRecordParseFunct */ {command: "add_dhcp_mac_to_ip", callback: parseNetworkingCommand_add_dhcp_mac_to_ip},
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/* DhcpMacRecordParseFunct */ {command: "remove_dhcp_mac_to_ip", callback: parseNetworkingCommand_remove_dhcp_mac_to_ip},
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/* BridgeMappingRecordParseFunct */ {command: "add_bridge_mapping", callback: parseNetworkingCommand_add_bridge_mapping},
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/* BridgeMappingRecordParseFunct */ {command: "remove_bridge_mapping", callback: parseNetworkingCommand_remove_bridge_mapping},
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/* NatPrefixRecordParseFunct */ {command: "add_nat_prefix", callback: parseNetworkingCommand_add_nat_prefix},
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/* NatPrefixRecordParseFunct */ {command: "remove_nat_prefix", callback: parseNetworkingCommand_remove_nat_prefix},
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}
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func NetworkingParserByCommand(command string) *func([]string) (*networkingCommandEntry, error) {
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for _, p := range NetworkingCommandParsers {
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if p.command == command {
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return &p.callback
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}
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}
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return nil
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}
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func parseNetworkingConfig(eof sentinelSignaller, rows chan []string) (chan networkingCommandEntry, sentinelSignaller) {
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var out chan networkingCommandEntry
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eop := make(sentinelSignaller)
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out = make(chan networkingCommandEntry)
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go func(in chan []string, out chan networkingCommandEntry) {
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for reading := true; reading; {
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select {
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case <-eof:
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reading = false
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case row := <-in:
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if len(row) >= 1 {
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parser := NetworkingParserByCommand(row[0])
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if parser == nil {
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log.Printf("Invalid command : %v", row)
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continue
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}
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callback := *parser
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entry, err := callback(row[1:])
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if err != nil {
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log.Printf("Unable to parse command : %v %v", err, row)
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continue
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}
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out <- *entry
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}
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}
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}
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close(eop)
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}(rows, out)
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return out, eop
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}
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type NetworkingConfig struct {
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answer map[int]map[string]string
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nat_portfwd map[int]map[string]string
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dhcp_mac_to_ip map[int]map[string]net.IP
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//bridge_mapping map[net.Interface]uint64 // XXX: we don't need the actual interface for anything but informing the user.
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bridge_mapping map[string]int
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nat_prefix map[int][]int
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}
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func (c NetworkingConfig) repr() string {
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return fmt.Sprintf("answer -> %v\nnat_portfwd -> %v\ndhcp_mac_to_ip -> %v\nbridge_mapping -> %v\nnat_prefix -> %v", c.answer, c.nat_portfwd, c.dhcp_mac_to_ip, c.bridge_mapping, c.nat_prefix)
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}
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func flattenNetworkingConfig(eof sentinelSignaller, in chan networkingCommandEntry) NetworkingConfig {
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var result NetworkingConfig
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var vmnet int
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result.answer = make(map[int]map[string]string)
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result.nat_portfwd = make(map[int]map[string]string)
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result.dhcp_mac_to_ip = make(map[int]map[string]net.IP)
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result.bridge_mapping = make(map[string]int)
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result.nat_prefix = make(map[int][]int)
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for reading := true; reading; {
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select {
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case <-eof:
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reading = false
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case e := <-in:
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switch e.entry.(type) {
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case networkingCommandEntry_answer:
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vnet := e.answer.vnet
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answers, exists := result.answer[vnet.Number()]
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if !exists {
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answers = make(map[string]string)
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result.answer[vnet.Number()] = answers
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}
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answers[vnet.Option()] = e.answer.value
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case networkingCommandEntry_remove_answer:
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vnet := e.remove_answer.vnet
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answers, exists := result.answer[vnet.Number()]
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if exists {
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delete(answers, vnet.Option())
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} else {
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log.Printf("Unable to remove answer %s as specified by `remove_answer`.\n", vnet.Repr())
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}
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case networkingCommandEntry_add_nat_portfwd:
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vmnet = e.add_nat_portfwd.vnet
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protoport := fmt.Sprintf("%s/%d", e.add_nat_portfwd.protocol, e.add_nat_portfwd.port)
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target := fmt.Sprintf("%s:%d", e.add_nat_portfwd.target_host, e.add_nat_portfwd.target_port)
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portfwds, exists := result.nat_portfwd[vmnet]
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if !exists {
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portfwds = make(map[string]string)
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result.nat_portfwd[vmnet] = portfwds
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}
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portfwds[protoport] = target
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case networkingCommandEntry_remove_nat_portfwd:
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vmnet = e.remove_nat_portfwd.vnet
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protoport := fmt.Sprintf("%s/%d", e.remove_nat_portfwd.protocol, e.remove_nat_portfwd.port)
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portfwds, exists := result.nat_portfwd[vmnet]
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if exists {
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delete(portfwds, protoport)
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} else {
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log.Printf("Unable to remove nat port-forward %s from interface %s%d as requested by `remove_nat_portfwd`.\n", protoport, NetworkingInterfacePrefix, vmnet)
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}
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case networkingCommandEntry_add_dhcp_mac_to_ip:
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vmnet = e.add_dhcp_mac_to_ip.vnet
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dhcpmacs, exists := result.dhcp_mac_to_ip[vmnet]
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if !exists {
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dhcpmacs = make(map[string]net.IP)
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result.dhcp_mac_to_ip[vmnet] = dhcpmacs
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}
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dhcpmacs[e.add_dhcp_mac_to_ip.mac.String()] = e.add_dhcp_mac_to_ip.ip
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case networkingCommandEntry_remove_dhcp_mac_to_ip:
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vmnet = e.remove_dhcp_mac_to_ip.vnet
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dhcpmacs, exists := result.dhcp_mac_to_ip[vmnet]
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if exists {
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delete(dhcpmacs, e.remove_dhcp_mac_to_ip.mac.String())
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} else {
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log.Printf("Unable to remove dhcp_mac_to_ip entry %v from interface %s%d as specified by `remove_dhcp_mac_to_ip`.\n", e.remove_dhcp_mac_to_ip, NetworkingInterfacePrefix, vmnet)
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}
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case networkingCommandEntry_add_bridge_mapping:
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intf := e.add_bridge_mapping.intf
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if _, err := intf.Interface(); err != nil {
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log.Printf("Interface \"%s\" as specified by `add_bridge_mapping` was not found on the current platform. This is a non-critical error. Ignoring.", intf.name)
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}
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result.bridge_mapping[intf.name] = e.add_bridge_mapping.vnet
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case networkingCommandEntry_remove_bridge_mapping:
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intf := e.remove_bridge_mapping.intf
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if _, err := intf.Interface(); err != nil {
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log.Printf("Interface \"%s\" as specified by `remove_bridge_mapping` was not found on the current platform. This is a non-critical error. Ignoring.", intf.name)
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}
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delete(result.bridge_mapping, intf.name)
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case networkingCommandEntry_add_nat_prefix:
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vmnet = e.add_nat_prefix.vnet
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_, exists := result.nat_prefix[vmnet]
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if exists {
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result.nat_prefix[vmnet] = append(result.nat_prefix[vmnet], e.add_nat_prefix.prefix)
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} else {
|
|
result.nat_prefix[vmnet] = []int{e.add_nat_prefix.prefix}
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|
}
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|
case networkingCommandEntry_remove_nat_prefix:
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|
vmnet = e.remove_nat_prefix.vnet
|
|
prefixes, exists := result.nat_prefix[vmnet]
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if exists {
|
|
for index := 0; index < len(prefixes); index++ {
|
|
if prefixes[index] == e.remove_nat_prefix.prefix {
|
|
result.nat_prefix[vmnet] = append(prefixes[:index], prefixes[index+1:]...)
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|
break
|
|
}
|
|
}
|
|
} else {
|
|
log.Printf("Unable to remove nat prefix /%d from interface %s%d as specified by `remove_nat_prefix`.\n", e.remove_nat_prefix.prefix, NetworkingInterfacePrefix, vmnet)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
// Constructor for networking file
|
|
func ReadNetworkingConfig(fd *os.File) (NetworkingConfig, error) {
|
|
// start piecing together different parts of the file
|
|
fromfile, eof := consumeFile(fd)
|
|
tokenized, eot := tokenizeNetworkingConfig(eof, fromfile)
|
|
rows, eos := splitNetworkingConfig(eot, tokenized)
|
|
entries, eop := parseNetworkingConfig(eos, rows)
|
|
|
|
// parse the version
|
|
parsed_version, err := networkingReadVersion(<-rows)
|
|
if err != nil {
|
|
return NetworkingConfig{}, err
|
|
}
|
|
|
|
// verify that it's 1.0 since that's all we support.
|
|
version := parsed_version.Number()
|
|
if version != 1.0 {
|
|
return NetworkingConfig{}, fmt.Errorf("Expected version %f of networking file. Received version %f.", 1.0, version)
|
|
}
|
|
|
|
// convert to a configuration
|
|
result := flattenNetworkingConfig(eop, entries)
|
|
return result, nil
|
|
}
|
|
|
|
// netmapper interface
|
|
type NetworkingType int
|
|
|
|
const (
|
|
NetworkingType_HOSTONLY = iota + 1
|
|
NetworkingType_NAT
|
|
NetworkingType_BRIDGED
|
|
)
|
|
|
|
func networkingConfig_InterfaceTypes(config NetworkingConfig) map[int]NetworkingType {
|
|
var result map[int]NetworkingType
|
|
result = make(map[int]NetworkingType)
|
|
|
|
// defaults
|
|
result[0] = NetworkingType_BRIDGED
|
|
result[1] = NetworkingType_HOSTONLY
|
|
result[8] = NetworkingType_NAT
|
|
|
|
// walk through config collecting bridged interfaces
|
|
for _, vmnet := range config.bridge_mapping {
|
|
result[vmnet] = NetworkingType_BRIDGED
|
|
}
|
|
|
|
// walk through answers finding out which ones are nat versus hostonly
|
|
for vmnet, table := range config.answer {
|
|
// everything should be defined as a virtual adapter...
|
|
if table["VIRTUAL_ADAPTER"] == "yes" {
|
|
|
|
// validate that the VNET entry contains everything we expect it to
|
|
_, subnetQ := table["HOSTONLY_SUBNET"]
|
|
_, netmaskQ := table["HOSTONLY_NETMASK"]
|
|
if !(subnetQ && netmaskQ) {
|
|
log.Printf("Interface %s%d is missing some expected keys (HOSTONLY_SUBNET, HOSTONLY_NETMASK). This is non-critical. Ignoring..", NetworkingInterfacePrefix, vmnet)
|
|
}
|
|
|
|
// distinguish between nat or hostonly
|
|
if table["NAT"] == "yes" {
|
|
result[vmnet] = NetworkingType_NAT
|
|
} else {
|
|
result[vmnet] = NetworkingType_HOSTONLY
|
|
}
|
|
|
|
// if it's not a virtual_adapter, then it must be an alias (really a bridge).
|
|
} else {
|
|
result[vmnet] = NetworkingType_BRIDGED
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func networkingConfig_NamesToVmnet(config NetworkingConfig) map[NetworkingType][]int {
|
|
types := networkingConfig_InterfaceTypes(config)
|
|
|
|
// now sort the keys
|
|
var keys []int
|
|
for vmnet := range types {
|
|
keys = append(keys, vmnet)
|
|
}
|
|
sort.Ints(keys)
|
|
|
|
// build result dictionary
|
|
var result map[NetworkingType][]int
|
|
result = make(map[NetworkingType][]int)
|
|
for i := 0; i < len(keys); i++ {
|
|
t := types[keys[i]]
|
|
result[t] = append(result[t], keys[i])
|
|
}
|
|
return result
|
|
}
|
|
|
|
const NetworkingInterfacePrefix = "vmnet"
|
|
|
|
func (e NetworkingConfig) NameIntoDevice(name string) (string, error) {
|
|
netmapper := networkingConfig_NamesToVmnet(e)
|
|
name = strings.ToLower(name)
|
|
|
|
var vmnet int
|
|
if name == "hostonly" && len(netmapper[NetworkingType_HOSTONLY]) > 0 {
|
|
vmnet = netmapper[NetworkingType_HOSTONLY][0]
|
|
} else if name == "nat" && len(netmapper[NetworkingType_NAT]) > 0 {
|
|
vmnet = netmapper[NetworkingType_NAT][0]
|
|
} else if name == "bridged" && len(netmapper[NetworkingType_BRIDGED]) > 0 {
|
|
vmnet = netmapper[NetworkingType_BRIDGED][0]
|
|
} else {
|
|
return "", fmt.Errorf("Network name not found : %v", name)
|
|
}
|
|
return fmt.Sprintf("%s%d", NetworkingInterfacePrefix, vmnet), nil
|
|
}
|
|
|
|
func (e NetworkingConfig) DeviceIntoName(device string) (string, error) {
|
|
types := networkingConfig_InterfaceTypes(e)
|
|
|
|
lowerdevice := strings.ToLower(device)
|
|
if !strings.HasPrefix(lowerdevice, NetworkingInterfacePrefix) {
|
|
return device, nil
|
|
}
|
|
vmnet, err := strconv.Atoi(lowerdevice[len(NetworkingInterfacePrefix):])
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
network := types[vmnet]
|
|
switch network {
|
|
case NetworkingType_HOSTONLY:
|
|
return "hostonly", nil
|
|
case NetworkingType_NAT:
|
|
return "nat", nil
|
|
case NetworkingType_BRIDGED:
|
|
return "bridged", nil
|
|
}
|
|
return "", fmt.Errorf("Unable to determine network type for device %s%d.", NetworkingInterfacePrefix, vmnet)
|
|
}
|
|
|
|
/** generic async file reader */
|
|
func consumeFile(fd *os.File) (chan byte, sentinelSignaller) {
|
|
fromfile := make(chan byte)
|
|
eof := make(sentinelSignaller)
|
|
go func() {
|
|
b := make([]byte, 1)
|
|
for {
|
|
_, err := fd.Read(b)
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
fromfile <- b[0]
|
|
}
|
|
close(eof)
|
|
}()
|
|
return fromfile, eof
|
|
}
|