Symbol: HOOKS4_INTERESTED_LOOPBACK_OUT
usr/src/uts/common/inet/ip/ip_output.c
1107
if (HOOKS4_INTERESTED_LOOPBACK_OUT(ipst)) {
usr/src/uts/common/inet/tcp/tcp_fusion.c
521
hooks_out = HOOKS4_INTERESTED_LOOPBACK_OUT(ipst);