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 ring_rx_setup(struct ring *ring, int sock, size_t size, int ifindex,
  15                           struct pollfd *poll, bool v3, bool jumbo_support,
  16                           bool verbose);
  17 extern void destroy_rx_ring(int sock, struct ring *ring);
  18 extern void sock_rx_net_stats(int sock, unsigned long seen);
  19
  20 static inline int user_may_pull_from_rx(struct tpacket2_hdr *hdr)
  21 {
  22         return ((hdr->tp_status & TP_STATUS_USER) == TP_STATUS_USER);
  23 }
  24
  25 static inline void kernel_may_pull_from_rx(struct tpacket2_hdr *hdr)
  26 {
  27         hdr->tp_status = TP_STATUS_KERNEL;
  28 }
  29
  30 #ifdef HAVE_TPACKET3
  31 static inline int user_may_pull_from_rx_block(struct block_desc *pbd)
  32 {
  33         return ((pbd->h1.block_status & TP_STATUS_USER) == TP_STATUS_USER);
  34 }
  35
  36 static inline void kernel_may_pull_from_rx_block(struct block_desc *pbd)
  37 {
  38         pbd->h1.block_status = TP_STATUS_KERNEL;
  39 }
  40 #endif /* HAVE_TPACKETV3 */
  41
  42 #endif /* RX_RING_H */