68 lines
1.1 KiB
Go
68 lines
1.1 KiB
Go
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package smtp
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import (
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"strings"
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cnsm "git.loafle.net/commons_go/network_service_matcher"
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)
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type SmtpMatcher struct {
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cnsm.Matchers
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}
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func (t *SmtpMatcher) ServiceName() string {
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return "SMTP"
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}
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func (t *SmtpMatcher) IsPrePacket() bool {
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return true
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}
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func (t *SmtpMatcher) HasResponse(index int) bool {
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return true
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}
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func (t *SmtpMatcher) IsError(info cnsm.MatchInfo, index int, packet *cnsm.Packet) bool {
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return false
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}
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func (t *SmtpMatcher) Match(info cnsm.MatchInfo, index int, packet *cnsm.Packet) bool {
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if packet == nil {
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return false
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}
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buf := string(packet.Buffer)
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if len(buf) == 0 || len(buf) < 5 {
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return false
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}
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splits := strings.Split(buf, "\r\n")
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splits = strings.Split(buf, " ")
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if index == 0 {
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if splits[0] == "220" {
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return true
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}
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} else if index == 1 {
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if splits[0] == "250" {
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return true
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}
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} else if index == 2 {
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if splits[0] == "221" {
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return true
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}
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}
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return false
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}
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func NewMatcher() cnsm.Matcher {
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m := &SmtpMatcher{}
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b := []byte("helo test\r\n")
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m.AddPacket(cnsm.NewPacket(b, len(b)))
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b = []byte("quit\r\n")
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m.AddPacket(cnsm.NewPacket(b, len(b)))
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return m
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}
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