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Support pcap with nano-second resolution #238

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pstavirs opened this issue Jan 11, 2018 · 2 comments
Open

Support pcap with nano-second resolution #238

pstavirs opened this issue Jan 11, 2018 · 2 comments
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Currently Ostinato only supports millisecond resolution pcap files.

Pcap file format reference
@pstavirs pstavirs added this to the v1.1 milestone Jan 30, 2020
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pstavirs commented Apr 7, 2020

Fix for #83 will resolve this as well - albeit with the caveat that the nano-second resolution is lost

@pstavirs pstavirs closed this as completed Apr 7, 2020
@pstavirs pstavirs modified the milestones: v1.1, v1.2 Dec 21, 2021
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pstavirs commented Dec 21, 2021 •
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Reopening to add native support for nanosecond pcap for the following cases -

  • Native support for reading nanosecpcap directly (non via-pdml)
  • Native support for reading nanosecpcap via-pdml (already supported: PDML only supports nanosec)
  • If via-pdml is set, convert non-pcap (e.g. pcapng) directly to PDML - this is happening today unintentionally - make it intentional (PDML needs PCAP file to cross check packet bytes, so direct conversion not possible)
  • When converting non-pcap to pcap, use nsecpcap format
  • Native support for saving to nanosecpcap
  • Capture support in nanosec precision

In all above cases, ensure that timestamps are read/written correctly for accurate replay

@pstavirs pstavirs reopened this Dec 21, 2021
pstavirs added a commit that referenced this issue Jan 19, 2022
@pstavirs
Read nanosec PCAP files natively in non-pdml mode
0f322fb 
In PDML mode, nanosecond support is already present - in fact, only
nanosecond is supported not microseconds.

Updates #238
pstavirs added a commit that referenced this issue Jan 19, 2022
@pstavirs
Add comment specifying PDML reader needs PCAP file
d09d830 
Updates #238
pstavirs added a commit that referenced this issue Jan 19, 2022
@pstavirs
Save PCAP always in nanosecond PCAP format
45d5e15 
Updates #238
pstavirs added a commit that referenced this issue Jan 19, 2022
@pstavirs
Use integer storage and arithmetic for nanosec pcap
226705f 
quint64 has larger range than double so has better accuracy. However,
for calculating packet rate, use floating-point arithmetic since the
packet rate is a double

Updates #238
pstavirs added a commit that referenced this issue Jan 19, 2022
@pstavirs
Use nsec pcap as intermediate when opening non-pcap
735e960 
When opening a non-PCAP file, we convert it to intermediate PCAP format.
Use nanosecond pcap format instead of standard microsec pcap format for
higher timestamp resolution.

Updates #238
@pstavirs pstavirs removed this from the v1.2 milestone Sep 4, 2022
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