echo_neg: uid=0
STEP socket node named neg
STEP mkpeer echo(E1) S.a<->E1.p
STEP named E1 = e1
STEP mkpeer echo(E2) E1.q<->E2.m
STEP named E2 = e2
STEP rmhook neg:a (E1 survives with q only)
STEP connect E2.n<->E1.s -- RING CLOSED (E1.q<->E2.m, E1.s<->E2.n)
STEP data socket connected to neg
STEP mkpeer S.b<->E1.inj (entry-attempt hook)
STEP A: data sent to E1.inj
STEP A: 4 bytes bounced back to sender: "PING" (ring untouched)
STEP B: e1:q -> response returned to sender: token=57353 flags=0x1 cookie=851672669 (no relay into ring)
STEP B: e2:n -> response returned to sender: token=57354 flags=0x1 cookie=851672669 (no relay into ring)
STEP B: e1:q -> response returned to sender: token=57355 flags=0x1 cookie=851672669 (no relay into ring)
STEP B: e2:n -> response returned to sender: token=57356 flags=0x1 cookie=851672669 (no relay into ring)
RESULT SURVIVED: bounced=1 responses=4 guest-alive
RESULT echo-ring inert: no injection channel (data reflects to sender; control responds to sender) -- DF-3557-style FLOW relay absent in ng_echo
EXIT=0