uselessfns(3)

💖 uselessfns 💖

okay bestie, so this is the uselessfns page from the library functions manual, and the name is lowkey a spoiler alert: these are internal functions. That's the whole NAME entry. That's it. We move. ✨

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🌸 SYNOPSIS 🌸

✨ Functions ✨

void pktb_push (struct pkt_buff *pktb, unsigned int len)
void pktb_pull (struct pkt_buff *pktb, unsigned int len)
void pktb_put (struct pkt_buff *pktb, unsigned int len)
void pktb_trim (struct pkt_buff *pktb, unsigned int len)

look at those four little gremlins. adorable. anyway—

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🚨 Detailed Description 🚨

Warning 🛑 Do not use these functions. Instead, always use the mangle function appropriate to the level at which you are working.

no fr fr, hands off. 🫶 instead you reach for the mangle function that matches the level you're actually working at, okay?

and here's the tea: pktb_mangle() uses all the below functions except pktb_pull, which is not used by anything. 💀 like, not one single thing. it's giving orphaned. it's giving ghosted. we still love her though.

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📖 Function Documentation 📖

void pktb_pull (struct pkt_buff * pktb, unsigned int len)

pktb_pull — increment pointer to packet buffer 🦋

Parameters

• pktb — Pointer to userspace packet buffer
• len — Number of bytes to add to packet start address

Definition at line 178 of file pktbuff.c. ⭐

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void pktb_push (struct pkt_buff * pktb, unsigned int len)

pktb_push — decrement pointer to packet buffer 💅

Parameters

• pktb — Pointer to userspace packet buffer
• len — Number of bytes to subtract from packet start address

Definition at line 166 of file pktbuff.c. ⭐

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void pktb_put (struct pkt_buff * pktb, unsigned int len)

pktb_put — add extra bytes to the tail of the packet buffer 🎀

Parameters

• pktb — Pointer to userspace packet buffer
• len — Number of bytes to add to packet tail (and length)

Definition at line 190 of file pktbuff.c. ⭐

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void pktb_trim (struct pkt_buff * pktb, unsigned int len)

pktb_trim — set new length for this packet buffer ✂️

Parameters

• pktb — Pointer to userspace packet buffer
• len — New packet length (tail is adjusted to reflect this)

Definition at line 201 of file pktbuff.c. ⭐

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👑 Author 👑

Generated automatically by Doxygen for libnetfilter_queue from the source code. not a human, just a robot doing its lil thing, and honestly? respect. 🤖✨

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and that's the whole page, babe — brought to you by libnetfilter_queue, Version 1.0.5, page uselessfns(3), manual name uselessfns, filed under Library Functions Manual. mwah. 💜