/usr/include/libnetfilter_queue/pktbuff.h is in libnetfilter-queue-dev 1.0.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | #ifndef _PKTBUFF_H_
#define _PKTBUFF_H_
struct pkt_buff;
struct pkt_buff *pktb_alloc(int family, void *data, size_t len, size_t extra);
void pktb_free(struct pkt_buff *pktb);
uint8_t *pktb_data(struct pkt_buff *pktb);
uint32_t pktb_len(struct pkt_buff *pktb);
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);
unsigned int pktb_tailroom(struct pkt_buff *pktb);
uint8_t *pktb_mac_header(struct pkt_buff *pktb);
uint8_t *pktb_network_header(struct pkt_buff *pktb);
uint8_t *pktb_transport_header(struct pkt_buff *pktb);
int pktb_mangle(struct pkt_buff *pkt, unsigned int dataoff, unsigned int match_offset, unsigned int match_len, const char *rep_buffer, unsigned int rep_len);
bool pktb_mangled(const struct pkt_buff *pktb);
#endif
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