uselessfns(3) Library Functions Manual uselessfns(3)

uselessfns - Internal 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)

Warning

Do not use these functions. Instead, always use the mangle function appropriate to the level at which you are working.
pktb_mangle() uses all the below functions except pktb_pull, which is not used by anything.

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.

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.

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.

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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Version 1.0.5 libnetfilter_queue