wired/srvxdpbpf_8h_source.html

#ifndef WIRED_SRVXDPBPF_SRVXDPBPF_H

#define WIRED_SRVXDPBPF_SRVXDPBPF_H


#include "common/platform/sys/syscall.h"


#define WIRED_SRVXDPBPF_MAP_ENTRIES 64u


typedef struct {

  i64 map_fd;

  i64 prog_fd;

  i64 link_fd;

} wired_srvxdpbpf;


i64 wired_srvxdpbpf_open(

    wired_srvxdpbpf* b, u32 ifindex, u16 port, u32 attach_flags);


i64 wired_srvxdpbpf_register(wired_srvxdpbpf* b, u32 queue_id, u32 xsk_fd);


void wired_srvxdpbpf_close(wired_srvxdpbpf* b);


#endif

wired_srvxdpbpf_open
i64 wired_srvxdpbpf_open(wired_srvxdpbpf *b, u32 ifindex, u16 port, u32 attach_flags)
Create the XSKMAP (WIRED_SRVXDPBPF_MAP_ENTRIES slots), build and load the redirect-filter program aro...

wired_srvxdpbpf_register
i64 wired_srvxdpbpf_register(wired_srvxdpbpf *b, u32 queue_id, u32 xsk_fd)
Point the map's queue_id slot at an XSK socket fd, so frames arriving on that NIC queue are redirecte...

wired_srvxdpbpf_close
void wired_srvxdpbpf_close(wired_srvxdpbpf *b)
Close the link, program and map fds in that order (negative fds are skipped) and reset each to -1.

wired_srvxdpbpf
The three kernel objects backing one interface's redirect filter.
Definition srvxdpbpf.h:18

wired_srvxdpbpf::map_fd
i64 map_fd
XSKMAP fd: rx_queue_index -> XSK socket fd.
Definition srvxdpbpf.h:20

wired_srvxdpbpf::link_fd
i64 link_fd
BPF link fd attaching the program to the interface.
Definition srvxdpbpf.h:24

wired_srvxdpbpf::prog_fd
i64 prog_fd
loaded redirect-filter program fd
Definition srvxdpbpf.h:22

syscall.h
Linux direct syscalls.

u32
unsigned int u32
unsigned 32-bit integer
Definition types.h:15

i64
long i64
signed 64-bit integer
Definition types.h:14

u16
unsigned short u16
unsigned 16-bit integer
Definition types.h:17