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<div>I think I have the concept of source/dest the wrong way around and I should be using the dest field, since I want to receive on that port number.
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<div>Am I correct in thinking that when creating the endpoint, the source field is me if I'm sending, but the dest field if I'm receiving on a particular port?</div>
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<div>thanks</div>
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<div>JB<br>
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<div id="divRpF224677" style="direction: ltr;"><font size="2" face="Tahoma" color="#000000"><b>From:</b> Libfabric-users [libfabric-users-bounces@lists.openfabrics.org] on behalf of Biddiscombe, John A. [biddisco@cscs.ch]<br>
<b>Sent:</b> 10 March 2019 10:21<br>
<b>To:</b> libfabric-users@lists.openfabrics.org<br>
<b>Subject:</b> [libfabric-users] trouble by FI_SOURCE use<br>
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<div>Hello list</div>
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<div>I need to use a particular port number when setting up a connection, so I have</div>
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<div>fabric_hints_->src_addr = socket_data;<br>
fabric_hints_->addr_format = FI_SOCKADDR_IN;<br>
fabric_hints_->src_addrlen = sizeof(struct sockaddr_in);<br>
//<br>
fabric_hints_->caps = FI_MSG | FI_RMA | FI_SOURCE |<br>
FI_WRITE | FI_READ | FI_REMOTE_READ | FI_REMOTE_WRITE | FI_RMA_EVENT;<br>
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<div>and all is well, but when a message comes in - <br>
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<div>if (src_addr == FI_ADDR_NOTAVAIL)<br>
{<br>
LOG_DEBUG_MSG("Source address not available...\n");<br>
std::terminate();<br>
}<br>
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<div>my check for the source fails. This is documented - however the documentation/examples appear ambiguous</div>
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<dl><dt><em>"src_addr - source address</em></dt><dd>If specified, indicates the source address. This field will be ignored in hints if FI_SOURCE flag is set."</dd><dt><br>
</dt><dt>But the examples/tutorials use src_addr and still set FI_SOURCE, so I tried it too and the endpoint is created on the correct port number. I'm happy.<br>
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<div>however, <br>
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<div>"<em>FI_SOURCE</em>
<dl><dd>Requests that the endpoint return source addressing data as part of its completion data."</dd></dl>
<div>So if I need the endpoint on a certain port number and I set src_addr, but now the FI_SOURCE flag is dropped, but I also want to know where messages are coming from - how do I get the source information with the message?</div>
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<div>Apologies if this question appears trivial, I've not looked at the code for a long time and forgotten much of what I knew about libfabric.</div>
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<div>yours</div>
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<div>JB</div>
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<div style="font-family:Tahoma; font-size:13px"><font size="2" face="Courier New">--
<br>
Dr. John Biddiscombe, email:biddisco @.at.@ cscs.ch<br>
http://www.cscs.ch/<br>
CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07<br>
Via Trevano 131, 6900 Lugano, Switzerland | Fax: +41 (91) 610.82.82<br>
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