dns_name6(3)

💖 dns_name6(3) — Library Functions Manual 💖

okay bestie, welcome to dns_name6, the little function that does reverse DNS for IPv6. it's giving "who is this address actually" energy and honestly? we're obsessed. 🦋

✨ NAME ✨

dns_name6 — look up host name 🔍

🌸 SYNTAX 🌸

#include <libowfat/dns.h>

int dns_name6(stralloc* out,const char* ip[16]);

💅 DESCRIPTION 💅

so dns_name6 looks up the domain name for the 16-byte IPv6 address sitting in ip. it drops the (first) domain name into out and returns 0. slay. ✨

but like… if the relevant ip6.arpa domain doesn't exist in DNS, or it just has no PTR records at all? then out will be empty. no name for you, bestie. 🙈

if dns_name6 has trouble with the DNS lookup or runs out of memory, it returns -1 and sets errno appropriately. and here's the thing — it may or may not change out. so don't go assuming anything about what's in there, fr fr. 😭

lowkey important: that -1 return means something went wrong, not no name found. those are two different vibes. 🫶

🎀 SEE ALSO 🎀

• dns_name_packet(3)
• dns_name6_domain(3)
• dns_name4(3)
• dns_ip6(3)

and that's the whole page, bestie!! 💖 mwah. this was dns_name6(3) from the Library Functions Manual, so go forth and reverse-look-up those IPv6 addresses like the main character you are. 👑✨🌈