dns_name4_domain(3)

💖 dns_name4_domain — ok so hear me out bestie 💖

Library Functions Manual ✨ the dns_name4_domain(3) page, but make it a group chat 🎀

🌸 NAME 🌸

dns_name4_domain — construct host name for reverse lookup 🦋

✨ SYNTAX ✨

#include <libowfat/dns.h>

void dns_name4_domain(char q[DNS_NAME4_DOMAIN],
                     const char* ip[4]);

yes the array size is literally right there in the signature, she's not being mysterious 💅

💜 DESCRIPTION 💜

Okay so. dns_name4_domain is a low-level component of dns_name4 — like, she's the backstage queen, not the headliner. 👑

What she does is so satisfying: she takes an IP address like 1.2.3.4 and flips it into a domain name like 4.3.2.1.in-addr.arpa — yes the octets go backwards, that's the whole reverse-lookup vibe, iykyk 🌈 — and then she places the packet-encoded domain name into q. 🫶

Not me emphasizing that it's packet-encoded, because it is, and that matters. 💀

• q is zero terminated. ✅
• q must have space for DNS_NAME4_DOMAIN bytes. No cap, no negotiating, no "maybe a little less". 😭

🚨 bestie warning: if q doesn't have DNS_NAME4_DOMAIN bytes of room, that's on you and it will not be cute. Give her the space she asked for. 🙈

🌟 SEE ALSO 🌟

• dns_name4(3)
• dns_name6_domain(3)

the whole little reverse-lookup friend group, love that for them 💖

Okay bye ily!! 💜 This one lives in the Library Functions Manual, and the footer of the page is literally just dns_name4_domain(3) again — she said "my name is my name," periodt. 👑 No date, no version drama, just the title showing up at the bottom like a little signature. 🎀✨🌸