Invalid pcapng timestamp

https://bugs.dpdk.org/show_bug.cgi?id=1291

            Bug ID: 1291
           Summary: Invalid pcapng timestamp
           Product: DPDK
           Version: 23.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: other
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

Hi,

rte_pcapng_copy() is called with rte_get_tsc_cycles().
And, if pcapng isn't initialized, pcapng_init() is called. rte_get_tsc_cyles() is called during pcapng_init for base time. But, cycles on pcapng_init() is later cycle than parameter of rte_pcapng_copy() in this case.
So, delta value of pcapng_tsc_to_ns() will be negative value.
But, delta value type is uint64_t.
It will cause incorrect timestamp.
Maybe, I'm thinking that pcapng_init() should be called before rte_pcapng_copy().

Joonmo Koo

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