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 "ring.h"
  11 #include "built_in.h"
  12
  13 extern void destroy_rx_ring(int sock, struct ring *ring);
  14 extern void create_rx_ring(int sock, struct ring *ring, int verbose);
  15 extern void mmap_rx_ring(int sock, struct ring *ring);
  16 extern void alloc_rx_ring_frames(int sock, struct ring *ring);
  17 extern void bind_rx_ring(int sock, struct ring *ring, int ifindex);
  18 extern void setup_rx_ring_layout(int sock, struct ring *ring,
  19                                  unsigned int size, bool jumbo_support, bool v3);
  20 extern void sock_rx_net_stats(int sock);
  21
  22 static inline int user_may_pull_from_rx(struct tpacket2_hdr *hdr)
  23 {
  24         return ((hdr->tp_status & TP_STATUS_USER) == TP_STATUS_USER);
  25 }
  26
  27 static inline int user_may_pull_from_rx_block(struct block_desc *pbd)
  28 {
  29         return ((pbd->h1.block_status & TP_STATUS_USER) == TP_STATUS_USER);
  30 }
  31
  32 static inline void kernel_may_pull_from_rx(struct tpacket2_hdr *hdr)
  33 {
  34         hdr->tp_status = TP_STATUS_KERNEL;
  35 }
  36
  37 static inline void kernel_may_pull_from_rx_block(struct block_desc *pbd)
  38 {
  39         pbd->h1.block_status = TP_STATUS_KERNEL;
  40 }
  41
  42 #endif /* RX_RING_H */