src/ring_rx.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2009, 2010 Daniel Borkmann.
   5  * Subject to the GPL, version 2.
   6  */
   7
   8 #ifndef RX_RING_H
   9 #define RX_RING_H
  10
  11 #include "ring.h"
  12 #include "built_in.h"
  13
  14 extern void destroy_rx_ring(int sock, struct ring *ring);
  15 extern void create_rx_ring(int sock, struct ring *ring, int verbose);
  16 extern void mmap_rx_ring(int sock, struct ring *ring);
  17 extern void alloc_rx_ring_frames(struct ring *ring);
  18 extern void bind_rx_ring(int sock, struct ring *ring, int ifindex);
  19 extern void setup_rx_ring_layout(int sock, struct ring *ring,
  20                                  unsigned int size, int jumbo_support);
  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 void kernel_may_pull_from_rx(struct tpacket2_hdr *hdr)
  28 {
  29         hdr->tp_status = TP_STATUS_KERNEL;
  30 }
  31
  32 #endif /* RX_RING_H */