tcpdump mailing list archives

Re: Unexpected primitive ack DL_UNITDATA_IND


From: Rick Jones <rick.jones2 () hp com>
Date: Wed, 09 Jun 2004 13:27:50 -0700

Gordon Tyler wrote:
Hi,

I have an application which uses libpcap 0.7.2 to monitor network
traffic by tracking the size of IP packets as well as their source and
destination. One of our QA people just encountered a rather odd error on
Solaris 8 which we have never seen before:

  recv_ack: info: Unexpected primitive ack DL_UNITDATA_IND

Does anybody know what this means? It seems to have occurred while
calling pcap_open_live (snaplen is sizeof(struct ip) + sizeof(struct
ether_header), promisc is 1, to_ms is 100).

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.

rick jones
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