Symbol: LEVEL_MASK
src/add-ons/kernel/network/protocols/ipv4/ipv4.cpp
1183
if ((level & LEVEL_MASK) != IPPROTO_IP)
src/add-ons/kernel/network/protocols/ipv6/ipv6.cpp
1073
if ((level & LEVEL_MASK) != IPPROTO_IPV6)
src/add-ons/kernel/network/protocols/tcp/tcp.cpp
546
if ((level & LEVEL_MASK) == IPPROTO_TCP) {