Standard library imports
- crypto/sha1
- encoding/binary
- fmt
- io
- log
- math
- strings
- sync
- sync/atomic
- tcpip/netstack/rand
- tcpip/netstack/tcpip
- tcpip/netstack/tcpip/buffer
- tcpip/netstack/tcpip/header
- tcpip/netstack/waiter
- time
- hash
- tcpip/netstack/tcpip/seqnum
- container/heap
- tcpip/netstack/tmutex
- tcpip/netstack/sleep
- tcpip/netstack/tcpip/stack