78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
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/*
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* Copyright(c) 2006 to 2022 ZettaScale Technology and others
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*
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* This program and the accompanying materials are made available under the
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* terms of the Eclipse Public License v. 2.0 which is available at
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* http://www.eclipse.org/legal/epl-2.0, or the Eclipse Distribution License
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* v. 1.0 which is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
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*/
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#ifndef NN_MISC_H
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#define NN_MISC_H
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#include "dds/ddsi/q_protocol.h"
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#if defined (__cplusplus)
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extern "C" {
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#endif
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DDS_INLINE_EXPORT inline seqno_t fromSN (const nn_sequence_number_t sn) {
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uint64_t sn_high = (uint32_t) sn.high;
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return (sn_high << 32) | sn.low;
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}
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DDS_INLINE_EXPORT inline bool validating_fromSN (const nn_sequence_number_t sn, seqno_t *res) {
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// fromSN does not checks whatsoever (and shouldn't because it is used quite a lot)
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// Valid sequence numbers are in [1 .. 2**63-1] union { SEQUENCE_NUMBER_UNKNOWN }
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// where SEQUENCE_NUMBER_UNKNOWN is the usual abomination: ((2**32-1) << 32)
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//
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// As far as I can tell, there are no messages where SEQUENCE_NUMBER_UNKNOWN is actually a
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// valid input (it would perhaps have been an elegant way to mark pre-emptive HEARTBEATs and
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// ACKNACKs, but convention is different). So we reject them as invalid until we are forced
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// to do differently. That leaves [1 .. 2**63-1]
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//
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// Since we use uint64_t, we can easily test by checking whether (s-1) is in [0 .. 2**63-1)
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const seqno_t tmp = fromSN (sn);
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*res = tmp;
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return (tmp - 1) < MAX_SEQ_NUMBER;
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}
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DDS_INLINE_EXPORT inline nn_sequence_number_t toSN (seqno_t n) {
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nn_sequence_number_t x;
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x.high = (int32_t) (n >> 32);
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x.low = (uint32_t) n;
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return x;
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}
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unsigned char normalize_data_datafrag_flags (const SubmessageHeader_t *smhdr);
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#ifdef DDS_HAS_NETWORK_PARTITIONS
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int WildcardOverlap(char * p1, char * p2);
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#endif
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extern const ddsi_guid_t nullguid;
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DDS_EXPORT bool guid_prefix_zero (const ddsi_guid_prefix_t *a);
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DDS_EXPORT int guid_prefix_eq (const ddsi_guid_prefix_t *a, const ddsi_guid_prefix_t *b);
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DDS_EXPORT int guid_eq (const struct ddsi_guid *a, const struct ddsi_guid *b);
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DDS_EXPORT int ddsi2_patmatch (const char *pat, const char *str);
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#ifdef DDS_HAS_NETWORK_PARTITIONS
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struct ddsi_config;
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struct ddsi_config_partitionmapping_listelem;
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struct ddsi_config_partitionmapping_listelem *find_partitionmapping (const struct ddsi_config *cfg, const char *partition, const char *topic);
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int is_ignored_partition (const struct ddsi_config *cfg, const char *partition, const char *topic);
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#endif
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#ifdef DDS_HAS_NETWORK_CHANNELS
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struct ddsi_config;
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struct ddsi_config_channel_listelem;
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struct ddsi_config_channel_listelem *find_channel (const struct config *cfg, nn_transport_priority_qospolicy_t transport_priority);
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#endif
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#if defined (__cplusplus)
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}
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#endif
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#endif /* NN_MISC_H */
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