tcpdump mailing list archives
Re: Unexpected primitive ack DL_UNITDATA_IND
From: Guy Harris <guy () alum mit edu>
Date: Wed, 9 Jun 2004 13:38:02 -0700
On Jun 9, 2004, at 1:27 PM, Rick Jones wrote:
Does it always happen or just sometimes? A DL_UNITDATA_IND is basically saying "Hi there, here is a packet" in DLPI speak. It looks like the stream is sending one of those up to the application when libpcap isn't expecting it.
In fact, it's sending one up when, presumably, libpcap is waiting for a DL_INFO_ACK in response to a DL_INFO_REQ it sent downstream to determine either the DLPI provider style or the link-layer type.
I don't have the DLPI spec handy; currently, pcap-dlpi.c makes two info requests, one just after opening the device and one after binding to the PPA (but *before* setting DLIOCRAW or pushing "bufmod") - can a DLPI provider cough up packets at that point?
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Current thread:
- Unexpected primitive ack DL_UNITDATA_IND Gordon Tyler (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Rick Jones (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Guy Harris (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Rick Jones (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Guy Harris (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Rick Jones (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Guy Harris (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Guy Harris (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Rick Jones (Jun 09)
- <Possible follow-ups>
- Re: Unexpected primitive ack DL_UNITDATA_IND Gordon Tyler (Jun 09)
- Re: Unexpected primitive ack DL_UNITDATA_IND Gordon Tyler (Jun 11)
- Re: Unexpected primitive ack DL_UNITDATA_IND Guy Harris (Jun 11)