Supported Features

(This document is under construction.)

Features highlighted in bold will be implemented next.

Supported Features

• ARP (arp.c)
• ICMP (icmp.c, partial): only responding to ICMP echo message
• Routing: Static only (ip_out.c)
• Event system: mtcp_epoll (eventpoll.c)
• Non-blocking socket functions (api.c, core.c)
• Support for Intel XL710 adapters. (dpdk_module.c)
• Increase support for # of cores to > 16. (mtcp.h)
• mTCP apps should communicate across multiple hops (beyond gateways) (config.c, ip_out.c)

Supported TCP Features

• Congestion control: New Reno (tcp_in/out.c)
• Fast retransmission (tcp_in/out.c)
• Retransmission timeout
• Timestamp option (tcp_in/out.c)
• Window scale option (tcp_in/out.c)
• Priority packet queueing for control packets
• TCP checksum offload (tcp_out.c)
• Multiple listening ports (tcp_in.c)

Unsupported Features

• UDP
• DNS
• Virtualization support
• FreeBSD version
• DHCP
• IP fragmentation (solve it with dpdk's [ip frag & reassembly lib (https://doc.dpdk.org/guides/prog_guide/ip_fragment_reassembly_lib.html)
• Blocking socket functions (api.c, core.c)
• Support for eventfd system call
• mTCP sendfile (mtcp_sendfile() is essential for large file transfers)
• Support for AF_XDP sockets
• Support for IPv6

Unsupported TCP Features

• SACK
• DSACK
• FACK
• Challenge ACK
• SYN cookies
• FastOPEN
• F-RTO
• MTU discovery
• Keepalive
• ER-TCP
• TCP segmentation offload (tcp_out.c: FlushTCPSendingBuffer())
• Nagle's algorithm