raw: Mention requirement for root user in README.

Privileged user must be used to run test suite and other programs using
the raw socket swift API: raw sockets may only be created by a
privileged user.

diff --git a/src/raw/README b/src/raw/README
index a277dcb..a27f372 100644 (file)
--- a/src/raw/README
+++ b/src/raw/README
@@ -23,7 +23,10 @@ Use the test/ folder to test the implementation. Use the Makefile to
 build the test executable and then run it:
       cd test/
       make
-      ./test
+      sudo ./test
+
+Test suite (and other usage of the API) must be run as root as it uses
+raw sockets.
 
 = FILE STRUCTURE =