sniff slirp traffic

Author: sleirsgoevy

.github/workflows/rust.yml

@@ -94,6 +94,14 @@ jobs:
         with:
           path: /tmp/logs
           name: tests-trace-${{ matrix.cgroups }}-${{ matrix.os }}
+      - uses: actions/upload-artifact@v1
+        if: always()
+        with:
+          path: /tmp/slirp_in.log
+      - uses: actions/upload-artifact@v1
+        if: always()
+        with:
+          path: /tmp/slirp_out.log
 
   nightly-checks:
     runs-on: ubuntu-20.04

uml-ci/uml-slirp.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-exec slirp-fullbolt 'host addr 10.0.2.2' 'redir tcp 2224 10.0.2.15:22'
+stdbuf -i 0 -o 0 tee /tmp/slirp_in.log | slirp-fullbolt 'host addr 10.0.2.2' 'redir tcp 2224 10.0.2.15:22' | stdbuf -i 0 -o 0 tee /tmp/slirp_out.log