Defined in 2 files as a enumerator:

• include/uapi/linux/tcp.h, line 75 (as a enumerator)
• tools/include/uapi/linux/tcp.h, line 75 (as a enumerator)

Referenced in 2 files:

• net/ipv4/tcp_input.c, line 109
• net/ipv4/tcp_offload.c, line 275