/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Copyright 2009, 2010 Emmanuel Roullit.
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <linux/if_ether.h>

#include "die.h"
#include "xmalloc.h"
#include "ring_tx.h"
#include "built_in.h"

void set_packet_loss_discard(int sock)
{
	int ret, discard = 1;
	ret = setsockopt(sock, SOL_PACKET, PACKET_LOSS, (void *) &discard,
			 sizeof(discard));
	if (ret < 0)
		panic("setsockopt: cannot set packet loss");
}

void destroy_tx_ring(int sock, struct ring *ring)
{
	int ret;

	munmap(ring->mm_space, ring->mm_len);
	ring->mm_len = 0;

	fmemset(&ring->layout, 0, sizeof(ring->layout));
	ret = setsockopt(sock, SOL_PACKET, PACKET_TX_RING, &ring->layout,
			 sizeof(ring->layout));
	if (unlikely(ret))
		panic("Cannot destroy the TX_RING: %s!\n", strerror(errno));

	xfree(ring->frames);
}

void setup_tx_ring_layout(int sock, struct ring *ring, unsigned int size,
			  bool jumbo_support)
{
	fmemset(&ring->layout, 0, sizeof(ring->layout));

	ring->layout.tp_block_size = (jumbo_support ?
				      getpagesize() << 4 :
				      getpagesize() << 2);

	ring->layout.tp_frame_size = (jumbo_support ?
				      TPACKET_ALIGNMENT << 12 :
				      TPACKET_ALIGNMENT << 7);

	ring->layout.tp_block_nr = size / ring->layout.tp_block_size;
	ring->layout.tp_frame_nr = ring->layout.tp_block_size /
				   ring->layout.tp_frame_size *
				   ring->layout.tp_block_nr;

	set_sockopt_tpacket_v2(sock);

	ring_verify_layout(ring);
}

void create_tx_ring(int sock, struct ring *ring, int verbose)
{
	int ret;
retry:
	ret = setsockopt(sock, SOL_PACKET, PACKET_TX_RING, &ring->layout,
			 sizeof(ring->layout));

	if (errno == ENOMEM && ring->layout.tp_block_nr > 1) {
		ring->layout.tp_block_nr >>= 1;
		ring->layout.tp_frame_nr = ring->layout.tp_block_size / 
					   ring->layout.tp_frame_size * 
					   ring->layout.tp_block_nr;
		goto retry;
	}

	if (ret < 0)
		panic("Cannot allocate TX_RING!\n");

	ring->mm_len = ring->layout.tp_block_size * ring->layout.tp_block_nr;

	if (verbose) {
		printf("TX,V2: %.2Lf MiB, %u Frames, each %u Byte allocated\n",
		       (long double) ring->mm_len / (1 << 20),
		       ring->layout.tp_frame_nr, ring->layout.tp_frame_size);
	}
}

void mmap_tx_ring(int sock, struct ring *ring)
{
	mmap_ring_generic(sock, ring);
}

void alloc_tx_ring_frames(int sock __maybe_unused, struct ring *ring)
{
	alloc_ring_frames_generic(ring, ring->layout.tp_frame_nr,
				  ring->layout.tp_frame_size);
}

void bind_tx_ring(int sock, struct ring *ring, int ifindex)
{
	bind_ring_generic(sock, ring, ifindex, true);
}
onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Tony Lindgren &lt;tony@atomide.com&gt;</td><td class='right'>2016-09-15 13:56:10 -0700</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-09-16 12:06:24 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=f50e38c9966076465bc8d9dd0bc582c268a0031e'>f50e38c9966076465bc8d9dd0bc582c268a0031e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=f50e38c9966076465bc8d9dd0bc582c268a0031e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f50e38c9966076465bc8d9dd0bc582c268a0031e'>094910c3f36be602c126d4fe6fd5edb4e631c68e</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=29b4817d4018df78086157ea3a55c1d9424a7cfc'>29b4817d4018df78086157ea3a55c1d9424a7cfc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=f50e38c9966076465bc8d9dd0bc582c268a0031e&amp;id2=29b4817d4018df78086157ea3a55c1d9424a7cfc'>diff</a>)</td></tr></table>
<div class='commit-subject'>regmap: Allow longer flag masks for read and write</div><div class='commit-msg'>We currently only support masking the top bit for read and write
flags. Let's make the mask unsigned long and mask the bytes based
on the configured register length to make things more generic.

This allows using regmap for more exotic combinations like SPI
devices that need little endian addressing.

Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f50e38c9966076465bc8d9dd0bc582c268a0031e'>Diffstat</a></div><table summary='diffstat' class='diffstat'>