GETNODEBYADDR(3)

📦 version 2.65build2, in ubuntu jammy

💖 GETNODEBYADDR(3) 💖

okay bestie, welcome to the DECnet corner of the manual — this one lives in section 3 of the Library Functions Manual, and it's all about looking up a DECnet node when all you've got is its address. no cap, it's a little bop. 🦋

✨ NAME ✨

getnodebyaddr — DECnet node entry retrieval by address 👑

🌸 SYNOPSIS 🌸

#include <netdnet/dn.h>
#include <netdnet/dnetdb.h>

struct nodeent *getnodebyaddr (char *addr, short len, const int family)

💅 DESCRIPTION 💅

so getnodebyaddr goes digging through the decnet hosts file looking for the DECnet node whose address equals addr and is len bytes long, belonging to protocol family family (that's PF_DECnet, babes). when it finds the one, it hands you back the node info all cozy inside the nodeent structure. 🎀

and if there's literally no entry matching? it returns NULL. that's it. that's the whole vibe check. 💀

🔥 EXAMPLE 🔥

here's how the girlies actually call it:

#include <netdnet/dn.h>
#include <netdnet/dnetdb.h>
#include <sys/socket.h>

main(void)
{
    struct dn_naddr          binaddr;
    struct nodeent      *dp;

    binaddr->a_len = 2;
    binaddr->a_addr[0] = 0x02;
    binaddr->a_addr[1] = 0x04;

    if ( (dp=getnodebyaddr(binaddr->a_addr,binaddr->len, PF_DECnet)) == NULL)
        printf("Error, cannot find node entry");
    else
        printf("Node name is %s",dp->n_name);
}

like, if it comes back NULL you print the error, and if it doesn't you get the node name. main character energy fr fr. ✨

🫶 SEE ALSO 🫶

DECnet database functions 🌈 July 28, 1998 — yeah she's vintage, she's from the DECnet database functions era, and honestly? iconic. mwah 💋 go look up some nodes bestie 💜

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