From: Fred Suter <suterf@ornl.gov>
Date: Tue, 5 Apr 2022 20:53:00 +0000 (-0400)
Subject: allow Engine::link_by_name_or_null(__loopback__)
X-Git-Tag: v3.32~330
X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/f0e4a3b40e5d2df886c43e36418121b5c0830992

allow Engine::link_by_name_or_null(__loopback__)
---

diff --git a/src/s4u/s4u_Engine.cpp b/src/s4u/s4u_Engine.cpp
index 74d9f867cc..7b529b4f8b 100644
--- a/src/s4u/s4u_Engine.cpp
+++ b/src/s4u/s4u_Engine.cpp
@@ -258,6 +258,9 @@ Link* Engine::link_by_name_or_null(const std::string& name) const
 {
   Link* link = nullptr;
   if (pimpl->netzone_root_) {
+    /* keep behavior where internal __loopback__ link from network model is given to user */
+    if (name == "__loopback__")
+      return pimpl->netzone_root_->get_network_model()->loopback_->get_iface();
     auto* link_impl = pimpl->netzone_root_->get_link_by_name_or_null(name);
     if (link_impl)
       link = link_impl->get_iface();