96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
package wsdiscovery
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/*******************************************************
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* Copyright (C) 2018 Palanjyan Zhorzhik
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*
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* This file is part of ws-discovery project.
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*
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* ws-discovery can be copied and/or distributed without the express
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* permission of Palanjyan Zhorzhik
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*******************************************************/
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import (
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"errors"
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"net"
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"os"
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"time"
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"github.com/gofrs/uuid"
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"golang.org/x/net/ipv4"
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)
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const bufSize = 8192
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//SendProbe to device
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func SendProbe(interfaceName string, scopes, types []string, namespaces map[string]string) ([]string, error) {
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// Creating UUID Version 4
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uuidV4 := uuid.Must(uuid.NewV4())
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//fmt.Printf("UUIDv4: %s\n", uuidV4)
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probeSOAP := buildProbeMessage(uuidV4.String(), scopes, types, namespaces)
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//probeSOAP = `<?xml version="1.0" encoding="UTF-8"?>
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//<Envelope xmlns="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://schemas.xmlsoap.org/ws/2004/08/addressing">
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//<Header>
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//<a:Action mustUnderstand="1">http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</a:Action>
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//<a:MessageID>uuid:78a2ed98-bc1f-4b08-9668-094fcba81e35</a:MessageID><a:ReplyTo>
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//<a:Address>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</a:Address>
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//</a:ReplyTo><a:To mustUnderstand="1">urn:schemas-xmlsoap-org:ws:2005:04:discovery</a:To>
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//</Header>
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//<Body><Probe xmlns="http://schemas.xmlsoap.org/ws/2005/04/discovery">
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//<d:Types xmlns:d="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:dp0="http://www.onvif.org/ver10/network/wsdl">dp0:NetworkVideoTransmitter</d:Types>
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//</Probe>
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//</Body>
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//</Envelope>`
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return sendUDPMulticast(probeSOAP.String(), interfaceName)
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}
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func sendUDPMulticast(msg string, interfaceName string) ([]string, error) {
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c, err := net.ListenPacket("udp4", "0.0.0.0:0")
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if err != nil {
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return nil, err
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}
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defer c.Close()
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iface, err := net.InterfaceByName(interfaceName)
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if err != nil {
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return nil, err
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}
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p := ipv4.NewPacketConn(c)
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group := net.IPv4(239, 255, 255, 250)
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if err := p.JoinGroup(iface, &net.UDPAddr{IP: group}); err != nil {
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return nil, err
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}
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dst := &net.UDPAddr{IP: group, Port: 3702}
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data := []byte(msg)
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for _, ifi := range []*net.Interface{iface} {
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if err := p.SetMulticastInterface(ifi); err != nil {
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return nil, err
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}
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p.SetMulticastTTL(2)
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if _, err := p.WriteTo(data, nil, dst); err != nil {
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return nil, err
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}
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}
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if err := p.SetReadDeadline(time.Now().Add(time.Second * 1)); err != nil {
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return nil, err
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}
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var result []string
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for {
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b := make([]byte, bufSize)
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n, _, _, err := p.ReadFrom(b)
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if err != nil {
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if !errors.Is(err, os.ErrDeadlineExceeded) {
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return nil, err
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}
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break
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}
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result = append(result, string(b[0:n]))
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}
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return result, nil
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}
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