bpf.h

   1 #ifndef BPF_I_H
   2 #define BPF_I_H
   3
   4 #include <linux/filter.h>
   5 #include <stdint.h>
   6 #include <stdlib.h>
   7
   8 #include "xmalloc.h"
   9 #include "bpf_insns.h"
  10 #include "bpf_ext.h"
  11
  12 extern void bpf_dump_op_table(void);
  13 extern void bpf_dump_all(struct sock_fprog *bpf);
  14 extern int __bpf_validate(const struct sock_fprog *bpf);
  15 extern uint32_t bpf_run_filter(const struct sock_fprog *bpf, uint8_t *packet,
  16                                size_t plen);
  17 extern void bpf_attach_to_sock(int sock, struct sock_fprog *bpf);
  18 extern void bpf_detach_from_sock(int sock);
  19 extern int enable_kernel_bpf_jit_compiler(void);
  20 extern void bpf_parse_rules(char *rulefile, struct sock_fprog *bpf, uint32_t link_type);
  21 #ifdef __WITH_TCPDUMP_LIKE_FILTER
  22 extern void bpf_try_compile(const char *rulefile, struct sock_fprog *bpf,
  23                             uint32_t link_type);
  24 #else
  25 static inline void bpf_try_compile(const char *rulefile,
  26                                    struct sock_fprog *bpf __maybe_unused,
  27                                    uint32_t link_type __maybe_unused)
  28 {
  29         panic("Cannot open file %s!\n", rulefile);
  30 }
  31 #endif
  32 static inline void bpf_release(struct sock_fprog *bpf)
  33 {
  34         free(bpf->filter);
  35 }
  36
  37 #endif /* BPF_I_H */