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3a9f267983
Add the first actually useful lookup method to the mslookup library: multicast DNS. The server side is added in a subsequent commit, when the mslookup server is implemented for the osmo-hlr program. Use custom DNS encoding instead of libc-ares (which we use in OsmoSGSN already), because libc-ares is only a DNS client implementation and we will need both client and server. Resubmit off10463c5fcafter being reverted in110a49f69f. This new version skips the mslookup_client_mdns test if multicast is not supported in the build environment. I have verified that it doesn't break the build anymore in my own OBS namespace. Related: OS#4237, OS#4361 Patch-by: osmith, nhofmeyr Change-Id: I3c340627181b632dd6a0d577aa2ea2a7cd035c0c
40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
/* Copyright 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*! \file mdns.h */
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#pragma once
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#include <osmocom/core/msgb.h>
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#include <osmocom/mslookup/mslookup.h>
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#define OSMO_MDNS_DOMAIN_SUFFIX_DEFAULT "mdns.osmocom.org"
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struct msgb *osmo_mdns_query_encode(void *ctx, uint16_t packet_id, const struct osmo_mslookup_query *query,
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const char *domain_suffix);
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struct osmo_mslookup_query *osmo_mdns_query_decode(void *ctx, const uint8_t *data, size_t data_len,
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uint16_t *packet_id, const char *domain_suffix);
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struct msgb *osmo_mdns_result_encode(void *ctx, uint16_t packet_id, const struct osmo_mslookup_query *query,
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const struct osmo_mslookup_result *result, const char *domain_suffix);
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int osmo_mdns_result_decode(void *ctx, const uint8_t *data, size_t data_len, uint16_t *packet_id,
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struct osmo_mslookup_query *query, struct osmo_mslookup_result *result,
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const char *domain_suffix);
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