tcp-environ(5)

📦 version 1.13.06, in alpine 3.24

okay so this is the File Formats Manual entry for tcp-environ(5), and it's literally about the environment variables that describe a TCP connection. Buckle up, bestie — it's giving network lore 💅✨

🌸 NAME 🌸

tcp-environ — TCP-related environment variables, periodt. 🎀

🦋 DESCRIPTION 🦋

The following environment variables describe a TCP connection. They are set up by tcp-env, tcpclient, and tcpserver. Note that TCP(6)LOCALHOST, TCP(6)REMOTEHOST, and TCP(6)REMOTEINFO can contain arbitrary characters — fr fr, arbitrary arbitrary 😭.

  • PROTO — the string TCP or TCP6. protocol main character energy ⭐
  • TCPLOCALHOST — the domain name of the local host, with uppercase letters converted to lowercase. If there is no currently available domain name for the local IP address, TCPLOCALHOST is not set. 💖
  • TCPLOCALIP — the IPv4 address of the local host, in dotted-decimal form or the respective compactified IPv6 address. 🌈
  • TCPLOCALPORT — the local TCP port number, in decimal. 🔢
  • TCPREMOTEIP — the IPv4 or the compactified IPv6 address of the remote host. 🦋
  • TCPREMOTEPORT — the remote TCP port number. 🎀
  • TCPREMOTEHOST — the domain name of the remote host, with uppercase letters converted to lowercase. If there is no currently available domain name for the remote IP address, TCPREMOTEHOST is not set. 💜
  • TCPREMOTEINFO — a connection-specific string, perhaps a username, supplied by the remote host via 931/1413/IDENT/TAP. If the remote host did not supply connection information, TCPREMOTEINFO is not set. 🙈
  • TCP6INTERFACE — the interface name ("eth0") for IPv6 connections using link-local addresses. 🌸
  • TCP6LOCALIP — the IPv6 address of the local host in compactified IPv6 address. ✨
  • TCP6REMOTEIP — the compactified IPv6 address of the remote host. ⭐
  • TCP6LOCALPORT and TCP6LOCALHOST, as well as TCP6REMOTEPORT and TCP6REMOTEHOST, are identical to their IPv4 counterparts. same vibe, IPv4 edition 🫶

🌈 SEE ALSO 🌈

iykyk, these are the friends of the page 💫

so yeah, that's the whole tcp-environ(5) page, bestie — File Formats Manual energy, go forth and vibe check those TCP environment variables 💖🫶

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