Oliver Smith | deb80a6 | 2019-11-29 16:01:54 +0100 | [diff] [blame] | 1 | module MSLookup_mDNS_Emulation { |
| 2 | |
| 3 | /* (C) 2020 sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Released under the terms of GNU General Public License, Version 2 or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 10 | */ |
| 11 | |
| 12 | import from DNS_Types all; |
| 13 | import from UDPasp_Types all; |
| 14 | import from MSLookup_mDNS_Types all; |
| 15 | |
| 16 | /* Transcode between mDNS and UDP: |
| 17 | Wait for DNS packets on the mDNS port, encode them as UDP and forward them to the mDNS_UDP port. |
| 18 | Wait for UDP packets on mDNS_UDP port, decode them as DNS and forward them to the mDNS port. */ |
| 19 | function f_main() runs on MSLookup_mDNS_Emulation_CT |
| 20 | { |
| 21 | var MSLookup_mDNS vl_dnsmsg; |
| 22 | var ASP_UDP vl_udpmsg; |
| 23 | map(self:mDNS_UDP, system:UDP); |
| 24 | alt { |
| 25 | [] mDNS_UDP.receive(ASP_UDP:?) -> value vl_udpmsg { |
| 26 | mDNS.send(MSLookup_mDNS: { |
| 27 | dec_PDU_DNS(vl_udpmsg.data), |
| 28 | vl_udpmsg.addressf, |
| 29 | vl_udpmsg.portf |
| 30 | }); |
| 31 | repeat; |
| 32 | } |
| 33 | [] mDNS.receive(MSLookup_mDNS:?) -> value vl_dnsmsg { |
| 34 | mDNS_UDP.send(ASP_UDP: { |
| 35 | enc_PDU_DNS(vl_dnsmsg.dnsMessage, false, true), |
| 36 | vl_dnsmsg.udpAddress, |
| 37 | vl_dnsmsg.udpPort |
| 38 | }); |
| 39 | repeat; |
| 40 | } |
| 41 | } |
| 42 | unmap(self:mDNS_UDP, system:UDP); |
| 43 | } |
| 44 | |
| 45 | } |