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/*
* 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 <stdbool.h>
#include "ring.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, bool verbose);
extern void mmap_tx_ring(int sock, struct ring *ring);
extern void alloc_tx_ring_frames(int sock, 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, size_t size,
bool 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_SEND_REQUEST | TP_STATUS_SENDING));
}
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);
}
static inline int pull_and_flush_tx_ring_wait(int sock)
{
return sendto(sock, NULL, 0, 0, NULL, 0);
}
#endif /* TX_RING_H */
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