diff options
Diffstat (limited to 'ring_tx.h')
| -rw-r--r-- | ring_tx.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/ring_tx.h b/ring_tx.h new file mode 100644 index 0000000..7970045 --- /dev/null +++ b/ring_tx.h @@ -0,0 +1,40 @@ +/* + * netsniff-ng - the packet sniffing beast + * Copyright 2009, 2010 Daniel Borkmann. + * Subject to the GPL, version 2. + */ + +#ifndef TX_RING_H +#define TX_RING_H + +#include "ring.h" +#include "built_in.h" + +/* Give userland 10 us time to push packets to the ring */ +#define TX_KERNEL_PULL_INT 10 + +extern void destroy_tx_ring(int sock, struct ring *ring); +extern void create_tx_ring(int sock, struct ring *ring, int verbose); +extern void mmap_tx_ring(int sock, struct ring *ring); +extern void alloc_tx_ring_frames(struct ring *ring); +extern void bind_tx_ring(int sock, struct ring *ring, int ifindex); +extern void setup_tx_ring_layout(int sock, struct ring *ring, + unsigned int size, int jumbo_support); +extern void set_packet_loss_discard(int sock); + +static inline int user_may_pull_from_tx(struct tpacket2_hdr *hdr) +{ + return ((hdr->tp_status & TP_STATUS_AVAILABLE) == TP_STATUS_AVAILABLE); +} + +static inline void kernel_may_pull_from_tx(struct tpacket2_hdr *hdr) +{ + hdr->tp_status = TP_STATUS_SEND_REQUEST; +} + +static inline int pull_and_flush_tx_ring(int sock) +{ + return sendto(sock, NULL, 0, MSG_DONTWAIT, NULL, 0); +} + +#endif /* TX_RING_H */ |