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https://github.com/openvswitch/ovs
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b6e840aed0
PCAP header magic numbers are different for microsecond and nanosecond resolution timestamps. This patch adds support for understanding the difference and reporting the time correctly with ovs_pcap_read(). When writing pcap files, OVS will always use microsecond resolution, so no new calculations were added to those functions. Signed-off-by: Mark Michelson <mmichels@redhat.com> Signed-off-by: Ben Pfaff <blp@ovn.org>
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/*
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* Copyright (c) 2009 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PCAP_FILE_H
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#define PCAP_FILE_H 1
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#include <stdio.h>
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struct flow;
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struct dp_packet;
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struct pcap_file;
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/* PCAP file reading and writing. */
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struct pcap_file *ovs_pcap_open(const char *file_name, const char *mode);
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struct pcap_file *ovs_pcap_stdout(void);
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int ovs_pcap_read_header(struct pcap_file *);
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void ovs_pcap_write_header(struct pcap_file *);
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int ovs_pcap_read(struct pcap_file *, struct dp_packet **,
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long long int *when);
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void ovs_pcap_write(struct pcap_file *, struct dp_packet *);
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void ovs_pcap_close(struct pcap_file *);
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/* Extracting TCP stream data from an Ethernet packet capture. */
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struct tcp_reader *tcp_reader_open(void);
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void tcp_reader_close(struct tcp_reader *);
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struct dp_packet *tcp_reader_run(struct tcp_reader *, const struct flow *,
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const struct dp_packet *);
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#endif /* pcap-file.h */
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