diff --git a/src_code/netstack/ilist/list.go b/src_code/tcpip/netstack/ilist/list.go
similarity index 100%
rename from src_code/netstack/ilist/list.go
rename to src_code/tcpip/netstack/ilist/list.go
diff --git a/src_code/netstack/rand/rand.go b/src_code/tcpip/netstack/rand/rand.go
similarity index 100%
rename from src_code/netstack/rand/rand.go
rename to src_code/tcpip/netstack/rand/rand.go
diff --git a/src_code/netstack/sleep/commit_amd64.s b/src_code/tcpip/netstack/sleep/commit_amd64.s
similarity index 100%
rename from src_code/netstack/sleep/commit_amd64.s
rename to src_code/tcpip/netstack/sleep/commit_amd64.s
diff --git a/src_code/netstack/sleep/commit_asm.go b/src_code/tcpip/netstack/sleep/commit_asm.go
similarity index 100%
rename from src_code/netstack/sleep/commit_asm.go
rename to src_code/tcpip/netstack/sleep/commit_asm.go
diff --git a/src_code/netstack/sleep/commit_noasm.go b/src_code/tcpip/netstack/sleep/commit_noasm.go
similarity index 100%
rename from src_code/netstack/sleep/commit_noasm.go
rename to src_code/tcpip/netstack/sleep/commit_noasm.go
diff --git a/src_code/netstack/sleep/empty.s b/src_code/tcpip/netstack/sleep/empty.s
similarity index 100%
rename from src_code/netstack/sleep/empty.s
rename to src_code/tcpip/netstack/sleep/empty.s
diff --git a/src_code/netstack/sleep/sleep_test.go b/src_code/tcpip/netstack/sleep/sleep_test.go
similarity index 100%
rename from src_code/netstack/sleep/sleep_test.go
rename to src_code/tcpip/netstack/sleep/sleep_test.go
diff --git a/src_code/netstack/sleep/sleep_unsafe.go b/src_code/tcpip/netstack/sleep/sleep_unsafe.go
similarity index 100%
rename from src_code/netstack/sleep/sleep_unsafe.go
rename to src_code/tcpip/netstack/sleep/sleep_unsafe.go
diff --git a/src_code/netstack/tcpip/buffer/prependable.go b/src_code/tcpip/netstack/tcpip/buffer/prependable.go
similarity index 100%
rename from src_code/netstack/tcpip/buffer/prependable.go
rename to src_code/tcpip/netstack/tcpip/buffer/prependable.go
diff --git a/src_code/netstack/tcpip/buffer/view.go b/src_code/tcpip/netstack/tcpip/buffer/view.go
similarity index 100%
rename from src_code/netstack/tcpip/buffer/view.go
rename to src_code/tcpip/netstack/tcpip/buffer/view.go
diff --git a/src_code/netstack/tcpip/buffer/view_test.go b/src_code/tcpip/netstack/tcpip/buffer/view_test.go
similarity index 100%
rename from src_code/netstack/tcpip/buffer/view_test.go
rename to src_code/tcpip/netstack/tcpip/buffer/view_test.go
diff --git a/src_code/netstack/tcpip/checker/checker.go b/src_code/tcpip/netstack/tcpip/checker/checker.go
similarity index 100%
rename from src_code/netstack/tcpip/checker/checker.go
rename to src_code/tcpip/netstack/tcpip/checker/checker.go
diff --git a/src_code/netstack/tcpip/header/arp.go b/src_code/tcpip/netstack/tcpip/header/arp.go
similarity index 100%
rename from src_code/netstack/tcpip/header/arp.go
rename to src_code/tcpip/netstack/tcpip/header/arp.go
diff --git a/src_code/netstack/tcpip/header/checksum.go b/src_code/tcpip/netstack/tcpip/header/checksum.go
similarity index 100%
rename from src_code/netstack/tcpip/header/checksum.go
rename to src_code/tcpip/netstack/tcpip/header/checksum.go
diff --git a/src_code/netstack/tcpip/header/eth.go b/src_code/tcpip/netstack/tcpip/header/eth.go
similarity index 100%
rename from src_code/netstack/tcpip/header/eth.go
rename to src_code/tcpip/netstack/tcpip/header/eth.go
diff --git a/src_code/netstack/tcpip/header/gue.go b/src_code/tcpip/netstack/tcpip/header/gue.go
similarity index 100%
rename from src_code/netstack/tcpip/header/gue.go
rename to src_code/tcpip/netstack/tcpip/header/gue.go
diff --git a/src_code/netstack/tcpip/header/icmpv4.go b/src_code/tcpip/netstack/tcpip/header/icmpv4.go
similarity index 100%
rename from src_code/netstack/tcpip/header/icmpv4.go
rename to src_code/tcpip/netstack/tcpip/header/icmpv4.go
diff --git a/src_code/netstack/tcpip/header/icmpv6.go b/src_code/tcpip/netstack/tcpip/header/icmpv6.go
similarity index 100%
rename from src_code/netstack/tcpip/header/icmpv6.go
rename to src_code/tcpip/netstack/tcpip/header/icmpv6.go
diff --git a/src_code/netstack/tcpip/header/interfaces.go b/src_code/tcpip/netstack/tcpip/header/interfaces.go
similarity index 100%
rename from src_code/netstack/tcpip/header/interfaces.go
rename to src_code/tcpip/netstack/tcpip/header/interfaces.go
diff --git a/src_code/netstack/tcpip/header/ipv4.go b/src_code/tcpip/netstack/tcpip/header/ipv4.go
similarity index 100%
rename from src_code/netstack/tcpip/header/ipv4.go
rename to src_code/tcpip/netstack/tcpip/header/ipv4.go
diff --git a/src_code/netstack/tcpip/header/ipv6.go b/src_code/tcpip/netstack/tcpip/header/ipv6.go
similarity index 100%
rename from src_code/netstack/tcpip/header/ipv6.go
rename to src_code/tcpip/netstack/tcpip/header/ipv6.go
diff --git a/src_code/netstack/tcpip/header/ipv6_fragment.go b/src_code/tcpip/netstack/tcpip/header/ipv6_fragment.go
similarity index 100%
rename from src_code/netstack/tcpip/header/ipv6_fragment.go
rename to src_code/tcpip/netstack/tcpip/header/ipv6_fragment.go
diff --git a/src_code/netstack/tcpip/header/ipversion_test.go b/src_code/tcpip/netstack/tcpip/header/ipversion_test.go
similarity index 100%
rename from src_code/netstack/tcpip/header/ipversion_test.go
rename to src_code/tcpip/netstack/tcpip/header/ipversion_test.go
diff --git a/src_code/netstack/tcpip/header/tcp.go b/src_code/tcpip/netstack/tcpip/header/tcp.go
similarity index 100%
rename from src_code/netstack/tcpip/header/tcp.go
rename to src_code/tcpip/netstack/tcpip/header/tcp.go
diff --git a/src_code/netstack/tcpip/header/tcp_test.go b/src_code/tcpip/netstack/tcpip/header/tcp_test.go
similarity index 100%
rename from src_code/netstack/tcpip/header/tcp_test.go
rename to src_code/tcpip/netstack/tcpip/header/tcp_test.go
diff --git a/src_code/netstack/tcpip/header/udp.go b/src_code/tcpip/netstack/tcpip/header/udp.go
similarity index 100%
rename from src_code/netstack/tcpip/header/udp.go
rename to src_code/tcpip/netstack/tcpip/header/udp.go
diff --git a/src_code/netstack/tcpip/link/channel/channel.go b/src_code/tcpip/netstack/tcpip/link/channel/channel.go
similarity index 100%
rename from src_code/netstack/tcpip/link/channel/channel.go
rename to src_code/tcpip/netstack/tcpip/link/channel/channel.go
diff --git a/src_code/netstack/tcpip/link/fdbased/endpoint.go b/src_code/tcpip/netstack/tcpip/link/fdbased/endpoint.go
similarity index 100%
rename from src_code/netstack/tcpip/link/fdbased/endpoint.go
rename to src_code/tcpip/netstack/tcpip/link/fdbased/endpoint.go
diff --git a/src_code/netstack/tcpip/link/fdbased/endpoint_test.go b/src_code/tcpip/netstack/tcpip/link/fdbased/endpoint_test.go
similarity index 100%
rename from src_code/netstack/tcpip/link/fdbased/endpoint_test.go
rename to src_code/tcpip/netstack/tcpip/link/fdbased/endpoint_test.go
diff --git a/src_code/netstack/tcpip/link/loopback/loopback.go b/src_code/tcpip/netstack/tcpip/link/loopback/loopback.go
similarity index 100%
rename from src_code/netstack/tcpip/link/loopback/loopback.go
rename to src_code/tcpip/netstack/tcpip/link/loopback/loopback.go
diff --git a/src_code/netstack/tcpip/link/rawfile/blockingpoll_unsafe.go b/src_code/tcpip/netstack/tcpip/link/rawfile/blockingpoll_unsafe.go
similarity index 100%
rename from src_code/netstack/tcpip/link/rawfile/blockingpoll_unsafe.go
rename to src_code/tcpip/netstack/tcpip/link/rawfile/blockingpoll_unsafe.go
diff --git a/src_code/netstack/tcpip/link/rawfile/errors.go b/src_code/tcpip/netstack/tcpip/link/rawfile/errors.go
similarity index 100%
rename from src_code/netstack/tcpip/link/rawfile/errors.go
rename to src_code/tcpip/netstack/tcpip/link/rawfile/errors.go
diff --git a/src_code/netstack/tcpip/link/rawfile/rawfile_unsafe.go b/src_code/tcpip/netstack/tcpip/link/rawfile/rawfile_unsafe.go
similarity index 100%
rename from src_code/netstack/tcpip/link/rawfile/rawfile_unsafe.go
rename to src_code/tcpip/netstack/tcpip/link/rawfile/rawfile_unsafe.go
diff --git a/src_code/netstack/tcpip/link/sniffer/pcap.go b/src_code/tcpip/netstack/tcpip/link/sniffer/pcap.go
similarity index 100%
rename from src_code/netstack/tcpip/link/sniffer/pcap.go
rename to src_code/tcpip/netstack/tcpip/link/sniffer/pcap.go
diff --git a/src_code/netstack/tcpip/link/sniffer/sniffer.go b/src_code/tcpip/netstack/tcpip/link/sniffer/sniffer.go
similarity index 100%
rename from src_code/netstack/tcpip/link/sniffer/sniffer.go
rename to src_code/tcpip/netstack/tcpip/link/sniffer/sniffer.go
diff --git a/src_code/netstack/tcpip/link/tuntap/tuntap.go b/src_code/tcpip/netstack/tcpip/link/tuntap/tuntap.go
similarity index 100%
rename from src_code/netstack/tcpip/link/tuntap/tuntap.go
rename to src_code/tcpip/netstack/tcpip/link/tuntap/tuntap.go
diff --git a/src_code/netstack/tcpip/network/arp/arp.go b/src_code/tcpip/netstack/tcpip/network/arp/arp.go
similarity index 100%
rename from src_code/netstack/tcpip/network/arp/arp.go
rename to src_code/tcpip/netstack/tcpip/network/arp/arp.go
diff --git a/src_code/netstack/tcpip/network/arp/arp_test.go b/src_code/tcpip/netstack/tcpip/network/arp/arp_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/arp/arp_test.go
rename to src_code/tcpip/netstack/tcpip/network/arp/arp_test.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/frag_heap.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/frag_heap.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/frag_heap.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/frag_heap.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/frag_heap_test.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/frag_heap_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/frag_heap_test.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/frag_heap_test.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/fragmentation.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/fragmentation.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/fragmentation.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/fragmentation.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/fragmentation_test.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/fragmentation_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/fragmentation_test.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/fragmentation_test.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/reassembler.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/reassembler.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/reassembler.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/reassembler.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/reassembler_list.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/reassembler_list.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/reassembler_list.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/reassembler_list.go
diff --git a/src_code/netstack/tcpip/network/fragmentation/reassembler_test.go b/src_code/tcpip/netstack/tcpip/network/fragmentation/reassembler_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/fragmentation/reassembler_test.go
rename to src_code/tcpip/netstack/tcpip/network/fragmentation/reassembler_test.go
diff --git a/src_code/netstack/tcpip/network/hash/hash.go b/src_code/tcpip/netstack/tcpip/network/hash/hash.go
similarity index 100%
rename from src_code/netstack/tcpip/network/hash/hash.go
rename to src_code/tcpip/netstack/tcpip/network/hash/hash.go
diff --git a/src_code/netstack/tcpip/network/ip_test.go b/src_code/tcpip/netstack/tcpip/network/ip_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ip_test.go
rename to src_code/tcpip/netstack/tcpip/network/ip_test.go
diff --git a/src_code/netstack/tcpip/network/ipv4/icmp.go b/src_code/tcpip/netstack/tcpip/network/ipv4/icmp.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ipv4/icmp.go
rename to src_code/tcpip/netstack/tcpip/network/ipv4/icmp.go
diff --git a/src_code/netstack/tcpip/network/ipv4/ipv4.go b/src_code/tcpip/netstack/tcpip/network/ipv4/ipv4.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ipv4/ipv4.go
rename to src_code/tcpip/netstack/tcpip/network/ipv4/ipv4.go
diff --git a/src_code/netstack/tcpip/network/ipv4/ipv4_test.go b/src_code/tcpip/netstack/tcpip/network/ipv4/ipv4_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ipv4/ipv4_test.go
rename to src_code/tcpip/netstack/tcpip/network/ipv4/ipv4_test.go
diff --git a/src_code/netstack/tcpip/network/ipv6/icmp.go b/src_code/tcpip/netstack/tcpip/network/ipv6/icmp.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ipv6/icmp.go
rename to src_code/tcpip/netstack/tcpip/network/ipv6/icmp.go
diff --git a/src_code/netstack/tcpip/network/ipv6/icmp_test.go b/src_code/tcpip/netstack/tcpip/network/ipv6/icmp_test.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ipv6/icmp_test.go
rename to src_code/tcpip/netstack/tcpip/network/ipv6/icmp_test.go
diff --git a/src_code/netstack/tcpip/network/ipv6/ipv6.go b/src_code/tcpip/netstack/tcpip/network/ipv6/ipv6.go
similarity index 100%
rename from src_code/netstack/tcpip/network/ipv6/ipv6.go
rename to src_code/tcpip/netstack/tcpip/network/ipv6/ipv6.go
diff --git a/src_code/netstack/tcpip/ports/ports.go b/src_code/tcpip/netstack/tcpip/ports/ports.go
similarity index 100%
rename from src_code/netstack/tcpip/ports/ports.go
rename to src_code/tcpip/netstack/tcpip/ports/ports.go
diff --git a/src_code/netstack/tcpip/ports/ports_test.go b/src_code/tcpip/netstack/tcpip/ports/ports_test.go
similarity index 100%
rename from src_code/netstack/tcpip/ports/ports_test.go
rename to src_code/tcpip/netstack/tcpip/ports/ports_test.go
diff --git a/src_code/netstack/tcpip/seqnum/seqnum.go b/src_code/tcpip/netstack/tcpip/seqnum/seqnum.go
similarity index 100%
rename from src_code/netstack/tcpip/seqnum/seqnum.go
rename to src_code/tcpip/netstack/tcpip/seqnum/seqnum.go
diff --git a/src_code/netstack/tcpip/stack/linkaddrcache.go b/src_code/tcpip/netstack/tcpip/stack/linkaddrcache.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/linkaddrcache.go
rename to src_code/tcpip/netstack/tcpip/stack/linkaddrcache.go
diff --git a/src_code/netstack/tcpip/stack/linkaddrcache_test.go b/src_code/tcpip/netstack/tcpip/stack/linkaddrcache_test.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/linkaddrcache_test.go
rename to src_code/tcpip/netstack/tcpip/stack/linkaddrcache_test.go
diff --git a/src_code/netstack/tcpip/stack/nic.go b/src_code/tcpip/netstack/tcpip/stack/nic.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/nic.go
rename to src_code/tcpip/netstack/tcpip/stack/nic.go
diff --git a/src_code/netstack/tcpip/stack/registration.go b/src_code/tcpip/netstack/tcpip/stack/registration.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/registration.go
rename to src_code/tcpip/netstack/tcpip/stack/registration.go
diff --git a/src_code/netstack/tcpip/stack/route.go b/src_code/tcpip/netstack/tcpip/stack/route.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/route.go
rename to src_code/tcpip/netstack/tcpip/stack/route.go
diff --git a/src_code/netstack/tcpip/stack/stack.go b/src_code/tcpip/netstack/tcpip/stack/stack.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/stack.go
rename to src_code/tcpip/netstack/tcpip/stack/stack.go
diff --git a/src_code/netstack/tcpip/stack/stack_test.go b/src_code/tcpip/netstack/tcpip/stack/stack_test.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/stack_test.go
rename to src_code/tcpip/netstack/tcpip/stack/stack_test.go
diff --git a/src_code/netstack/tcpip/stack/transport_demuxer.go b/src_code/tcpip/netstack/tcpip/stack/transport_demuxer.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/transport_demuxer.go
rename to src_code/tcpip/netstack/tcpip/stack/transport_demuxer.go
diff --git a/src_code/netstack/tcpip/stack/transport_test.go b/src_code/tcpip/netstack/tcpip/stack/transport_test.go
similarity index 100%
rename from src_code/netstack/tcpip/stack/transport_test.go
rename to src_code/tcpip/netstack/tcpip/stack/transport_test.go
diff --git a/src_code/netstack/tcpip/tcpip.go b/src_code/tcpip/netstack/tcpip/tcpip.go
similarity index 100%
rename from src_code/netstack/tcpip/tcpip.go
rename to src_code/tcpip/netstack/tcpip/tcpip.go
diff --git a/src_code/netstack/tcpip/tcpip_test.go b/src_code/tcpip/netstack/tcpip/tcpip_test.go
similarity index 100%
rename from src_code/netstack/tcpip/tcpip_test.go
rename to src_code/tcpip/netstack/tcpip/tcpip_test.go
diff --git a/src_code/netstack/tcpip/time.s b/src_code/tcpip/netstack/tcpip/time.s
similarity index 100%
rename from src_code/netstack/tcpip/time.s
rename to src_code/tcpip/netstack/tcpip/time.s
diff --git a/src_code/netstack/tcpip/time_unsafe.go b/src_code/tcpip/netstack/tcpip/time_unsafe.go
similarity index 100%
rename from src_code/netstack/tcpip/time_unsafe.go
rename to src_code/tcpip/netstack/tcpip/time_unsafe.go
diff --git a/src_code/netstack/tcpip/transport/ping/endpoint.go b/src_code/tcpip/netstack/tcpip/transport/ping/endpoint.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/ping/endpoint.go
rename to src_code/tcpip/netstack/tcpip/transport/ping/endpoint.go
diff --git a/src_code/netstack/tcpip/transport/ping/ping_packet_list.go b/src_code/tcpip/netstack/tcpip/transport/ping/ping_packet_list.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/ping/ping_packet_list.go
rename to src_code/tcpip/netstack/tcpip/transport/ping/ping_packet_list.go
diff --git a/src_code/netstack/tcpip/transport/ping/protocol.go b/src_code/tcpip/netstack/tcpip/transport/ping/protocol.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/ping/protocol.go
rename to src_code/tcpip/netstack/tcpip/transport/ping/protocol.go
diff --git a/src_code/netstack/tcpip/transport/tcp/accept.go b/src_code/tcpip/netstack/tcpip/transport/tcp/accept.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/accept.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/accept.go
diff --git a/src_code/netstack/tcpip/transport/tcp/connect.go b/src_code/tcpip/netstack/tcpip/transport/tcp/connect.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/connect.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/connect.go
diff --git a/src_code/netstack/tcpip/transport/tcp/cubic.go b/src_code/tcpip/netstack/tcpip/transport/tcp/cubic.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/cubic.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/cubic.go
diff --git a/src_code/netstack/tcpip/transport/tcp/dual_stack_test.go b/src_code/tcpip/netstack/tcpip/transport/tcp/dual_stack_test.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/dual_stack_test.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/dual_stack_test.go
diff --git a/src_code/netstack/tcpip/transport/tcp/endpoint.go b/src_code/tcpip/netstack/tcpip/transport/tcp/endpoint.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/endpoint.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/endpoint.go
diff --git a/src_code/netstack/tcpip/transport/tcp/forwarder.go b/src_code/tcpip/netstack/tcpip/transport/tcp/forwarder.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/forwarder.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/forwarder.go
diff --git a/src_code/netstack/tcpip/transport/tcp/protocol.go b/src_code/tcpip/netstack/tcpip/transport/tcp/protocol.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/protocol.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/protocol.go
diff --git a/src_code/netstack/tcpip/transport/tcp/rcv.go b/src_code/tcpip/netstack/tcpip/transport/tcp/rcv.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/rcv.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/rcv.go
diff --git a/src_code/netstack/tcpip/transport/tcp/reno.go b/src_code/tcpip/netstack/tcpip/transport/tcp/reno.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/reno.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/reno.go
diff --git a/src_code/netstack/tcpip/transport/tcp/sack.go b/src_code/tcpip/netstack/tcpip/transport/tcp/sack.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/sack.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/sack.go
diff --git a/src_code/netstack/tcpip/transport/tcp/segment.go b/src_code/tcpip/netstack/tcpip/transport/tcp/segment.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/segment.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/segment.go
diff --git a/src_code/netstack/tcpip/transport/tcp/segment_heap.go b/src_code/tcpip/netstack/tcpip/transport/tcp/segment_heap.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/segment_heap.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/segment_heap.go
diff --git a/src_code/netstack/tcpip/transport/tcp/segment_queue.go b/src_code/tcpip/netstack/tcpip/transport/tcp/segment_queue.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/segment_queue.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/segment_queue.go
diff --git a/src_code/netstack/tcpip/transport/tcp/snd.go b/src_code/tcpip/netstack/tcpip/transport/tcp/snd.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/snd.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/snd.go
diff --git a/src_code/netstack/tcpip/transport/tcp/tcp_sack_test.go b/src_code/tcpip/netstack/tcpip/transport/tcp/tcp_sack_test.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/tcp_sack_test.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/tcp_sack_test.go
diff --git a/src_code/netstack/tcpip/transport/tcp/tcp_segment_list.go b/src_code/tcpip/netstack/tcpip/transport/tcp/tcp_segment_list.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/tcp_segment_list.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/tcp_segment_list.go
diff --git a/src_code/netstack/tcpip/transport/tcp/tcp_test.go b/src_code/tcpip/netstack/tcpip/transport/tcp/tcp_test.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/tcp_test.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/tcp_test.go
diff --git a/src_code/netstack/tcpip/transport/tcp/tcp_timestamp_test.go b/src_code/tcpip/netstack/tcpip/transport/tcp/tcp_timestamp_test.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/tcp_timestamp_test.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/tcp_timestamp_test.go
diff --git a/src_code/netstack/tcpip/transport/tcp/testing/context/context.go b/src_code/tcpip/netstack/tcpip/transport/tcp/testing/context/context.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/testing/context/context.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/testing/context/context.go
diff --git a/src_code/netstack/tcpip/transport/tcp/timer.go b/src_code/tcpip/netstack/tcpip/transport/tcp/timer.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcp/timer.go
rename to src_code/tcpip/netstack/tcpip/transport/tcp/timer.go
diff --git a/src_code/netstack/tcpip/transport/tcpconntrack/tcp_conntrack.go b/src_code/tcpip/netstack/tcpip/transport/tcpconntrack/tcp_conntrack.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcpconntrack/tcp_conntrack.go
rename to src_code/tcpip/netstack/tcpip/transport/tcpconntrack/tcp_conntrack.go
diff --git a/src_code/netstack/tcpip/transport/tcpconntrack/tcp_conntrack_test.go b/src_code/tcpip/netstack/tcpip/transport/tcpconntrack/tcp_conntrack_test.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/tcpconntrack/tcp_conntrack_test.go
rename to src_code/tcpip/netstack/tcpip/transport/tcpconntrack/tcp_conntrack_test.go
diff --git a/src_code/netstack/tcpip/transport/udp/endpoint.go b/src_code/tcpip/netstack/tcpip/transport/udp/endpoint.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/udp/endpoint.go
rename to src_code/tcpip/netstack/tcpip/transport/udp/endpoint.go
diff --git a/src_code/netstack/tcpip/transport/udp/protocol.go b/src_code/tcpip/netstack/tcpip/transport/udp/protocol.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/udp/protocol.go
rename to src_code/tcpip/netstack/tcpip/transport/udp/protocol.go
diff --git a/src_code/netstack/tcpip/transport/udp/udp_packet_list.go b/src_code/tcpip/netstack/tcpip/transport/udp/udp_packet_list.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/udp/udp_packet_list.go
rename to src_code/tcpip/netstack/tcpip/transport/udp/udp_packet_list.go
diff --git a/src_code/netstack/tcpip/transport/udp/udp_test.go b/src_code/tcpip/netstack/tcpip/transport/udp/udp_test.go
similarity index 100%
rename from src_code/netstack/tcpip/transport/udp/udp_test.go
rename to src_code/tcpip/netstack/tcpip/transport/udp/udp_test.go
diff --git a/src_code/netstack/tmutex/tmutex.go b/src_code/tcpip/netstack/tmutex/tmutex.go
similarity index 100%
rename from src_code/netstack/tmutex/tmutex.go
rename to src_code/tcpip/netstack/tmutex/tmutex.go
diff --git a/src_code/netstack/tmutex/tmutex_test.go b/src_code/tcpip/netstack/tmutex/tmutex_test.go
similarity index 100%
rename from src_code/netstack/tmutex/tmutex_test.go
rename to src_code/tcpip/netstack/tmutex/tmutex_test.go
diff --git a/src_code/netstack/waiter/waiter.go b/src_code/tcpip/netstack/waiter/waiter.go
similarity index 100%
rename from src_code/netstack/waiter/waiter.go
rename to src_code/tcpip/netstack/waiter/waiter.go
diff --git a/src_code/netstack/waiter/waiter_test.go b/src_code/tcpip/netstack/waiter/waiter_test.go
similarity index 100%
rename from src_code/netstack/waiter/waiter_test.go
rename to src_code/tcpip/netstack/waiter/waiter_test.go
diff --git a/tcpip/tcpip.go b/tcpip/tcpip.go
new file mode 100644
index 0000000..1e7f38a
--- /dev/null
+++ b/tcpip/tcpip.go
@@ -0,0 +1,31 @@
+package tcpip
+
+type Error struct {
+	msg         string
+	ignoreStats bool
+}
+
+func (err *Error) String() string {
+	return err.msg
+}
+
+func (err *Error) IgnoreStats() bool {
+	return err.ignoreStats
+}
+
+var (
+	ErrUnknowProtovol       = &Error{msg: "unknown protocol"}
+	ErrUnknowNICID          = &Error{msg: "unknown nic id"}
+	ErrUnknowProtocolOption = &Error{msg: "unknown option for protocol"}
+	ErrDuplicateNICID       = &Error{msg: "duplicate nic id"}
+	ErrDuplicateAddress     = &Error{msg: "duplicate address"}
+	ErrNoRoute              = &Error{msg: "no route"}
+	ErrBadLinkEndPoint      = &Error{msg: "bad link layer endpoint"}
+	ErrAlreadyBound         = &Error{msg: "endpoint already bound", ignoreStats: true}
+	ErrInvalidEndpointState = &Error{msg: "endpoint is in invalid state"}
+	ErrAlreadConnecting     = &Error{msg: "endpoint is already connecting", ignoreStats: true}
+	ErrAlreadConnected      = &Error{msg: "endpoint is already connected", ignoreStats: true}
+	ErrNoPortAvailable      = &Error{msg: "no port are available"}
+	ErrPortInUse            = &Error{msg: "port is in use"}
+	ErrBadLocalAddress = &
+)