ring_rx.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * Copyright 2009, 2010 Daniel Borkmann.
   4  * Subject to the GPL, version 2.
   5  */
   6
   7 #ifndef RX_RING_H
   8 #define RX_RING_H
   9
  10 #include <stdbool.h>
  11
  12 #include "ring.h"
  13 #include "built_in.h"
  14
  15 extern void destroy_rx_ring(int sock, struct ring *ring);
  16 extern void create_rx_ring(int sock, struct ring *ring, int verbose);
  17 extern void mmap_rx_ring(int sock, struct ring *ring);
  18 extern void alloc_rx_ring_frames(int sock, struct ring *ring);
  19 extern void bind_rx_ring(int sock, struct ring *ring, int ifindex);
  20 extern void setup_rx_ring_layout(int sock, struct ring *ring,
  21                                  unsigned int size, bool jumbo_support, bool v3);
  22 extern void sock_rx_net_stats(int sock);
  23
  24 static inline int user_may_pull_from_rx(struct tpacket2_hdr *hdr)
  25 {
  26         return ((hdr->tp_status & TP_STATUS_USER) == TP_STATUS_USER);
  27 }
  28
  29 static inline int user_may_pull_from_rx_block(struct block_desc *pbd)
  30 {
  31         return ((pbd->h1.block_status & TP_STATUS_USER) == TP_STATUS_USER);
  32 }
  33
  34 static inline void kernel_may_pull_from_rx(struct tpacket2_hdr *hdr)
  35 {
  36         hdr->tp_status = TP_STATUS_KERNEL;
  37 }
  38
  39 static inline void kernel_may_pull_from_rx_block(struct block_desc *pbd)
  40 {
  41         pbd->h1.block_status = TP_STATUS_KERNEL;
  42 }
  43
  44 #endif /* RX_RING_H */