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