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espat: add ResolveUDPAddr and ResolveTCPAddr implementations using AT command for DNS lookup

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Signed-off-by: Ron Evans <ron@hybridgroup.com>
This commit is contained in:
Ron Evans
2019-06-21 10:24:50 +02:00
parent a267fdb8ce
commit 9c88d1fab4
3 changed files with 62 additions and 1 deletions
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espat/tcp.go
+13 -1
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@@ -15,11 +15,23 @@ const (
TCPTransferModeUnvarnished = 1
)
// GetDNS returns the IP address for a domain name.
func (d *Device) GetDNS(domain string) (IP, error) {
d.Set(TCPDNSLookup, "\""+domain+"\"")
time.Sleep(1000 * time.Millisecond)
r := strings.Split(string(d.Response()), ":")
if len(r) != 2 {
return nil, errors.New("Invalid domain lookup result")
}
res := strings.Split(r[1], "\r\n")
return IP(res[0]), nil
}
// ConnectTCPSocket creates a new TCP socket connection for the ESP8266/ESP32.
// Currently only supports single connection mode.
func (d *Device) ConnectTCPSocket(addr, port string) error {
protocol := "TCP"
val := "\"" + protocol + "\",\"" + addr + "\"," + port
val := "\"" + protocol + "\",\"" + addr + "\"," + port + ",120"
d.Set(TCPConnect, val)
time.Sleep(1000 * time.Millisecond)
r := d.Response()