/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * 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 "xmalloc.h"
#include "die.h"
#include "ring_rx.h"
#include "built_in.h"

void destroy_rx_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_RX_RING, &ring->layout,
			 sizeof(ring->layout));
	if (unlikely(ret))
		panic("Cannot destroy the RX_RING: %s!\n", strerror(errno));

	xfree(ring->frames);
}

void setup_rx_ring_layout(int sock, struct ring *ring, unsigned int size,
			  int 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;

	bug_on(ring->layout.tp_block_size < ring->layout.tp_frame_size);
	bug_on((ring->layout.tp_block_size % ring->layout.tp_frame_size) != 0);
	bug_on((ring->layout.tp_block_size % getpagesize()) != 0);
}

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

	set_sockopt_tpacket(sock);
retry:
	ret = setsockopt(sock, SOL_PACKET, PACKET_RX_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 RX_RING!\n");

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

	if (verbose) {
		printf("RX: %.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_rx_ring(int sock, struct ring *ring)
{
	ring->mm_space = mmap(0, ring->mm_len, PROT_READ | PROT_WRITE,
			      MAP_SHARED | MAP_LOCKED | MAP_POPULATE, sock, 0);
	if (ring->mm_space == MAP_FAILED) {
		destroy_rx_ring(sock, ring);
		panic("Cannot mmap RX_RING!\n");
	}
}

void alloc_rx_ring_frames(struct ring *ring)
{
	int i;
	size_t len = ring->layout.tp_frame_nr * sizeof(*ring->frames);

	ring->frames = xmalloc_aligned(len, CO_CACHE_LINE_SIZE);
	fmemset(ring->frames, 0, len);

	for (i = 0; i < ring->layout.tp_frame_nr; ++i) {
		ring->frames[i].iov_len = ring->layout.tp_frame_size;
		ring->frames[i].iov_base = ring->mm_space +
					   (i * ring->layout.tp_frame_size);
	}
}

void bind_rx_ring(int sock, struct ring *ring, int ifindex)
{
	int ret;
	/*
	 * The RX_RING registers itself to the networking stack with
	 * dev_add_pack(), so we have one single RX_RING for all devs
	 * otherwise you'll get the packet twice.
	 */
	fmemset(&ring->s_ll, 0, sizeof(ring->s_ll));

	ring->s_ll.sll_family = AF_PACKET;
	ring->s_ll.sll_protocol = htons(ETH_P_ALL);
	ring->s_ll.sll_ifindex = ifindex;
	ring->s_ll.sll_hatype = 0;
	ring->s_ll.sll_halen = 0;
	ring->s_ll.sll_pkttype = 0;

	ret = bind(sock, (struct sockaddr *) &ring->s_ll, sizeof(ring->s_ll));
	if (ret < 0) {
		destroy_rx_ring(sock, ring);
		panic("Cannot bind RX_RING!\n");
	}
}
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>Milo Kim &lt;woogyom.kim@gmail.com&gt;</td><td class='right'>2016-10-28 15:54:11 +0900</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-02 14:58:59 -0600</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=8ea7ce9cc6dec26db22a97f00523a4bfd3a97d72'>8ea7ce9cc6dec26db22a97f00523a4bfd3a97d72</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=8ea7ce9cc6dec26db22a97f00523a4bfd3a97d72'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=8ea7ce9cc6dec26db22a97f00523a4bfd3a97d72'>84277f7b0c6644a3fcf189a35196b4bd2a3ca788</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=196737912da5eab055489e0635662a3b7adef6eb'>196737912da5eab055489e0635662a3b7adef6eb</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=8ea7ce9cc6dec26db22a97f00523a4bfd3a97d72&amp;id2=196737912da5eab055489e0635662a3b7adef6eb'>diff</a>)</td></tr></table>
<div class='commit-subject'>spi: sun6i: Add binding for Allwinner H3 SPI controller</div><div class='commit-msg'>H3 SPI has same architecture as A31 except FIFO capacity.
To configure the buffer size separately, compatible property should be
different. Optional DMA specifiers and example are added.

Signed-off-by: Milo Kim &lt;woogyom.kim@gmail.com&gt;
Acked-by: Maxime Ripard &lt;maxime.ripard@free-electrons.com&gt;
Acked-by: Rob Herring &lt;robh+dt@kernel.org&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/?h=nds-private-remove&amp;id=8ea7ce9cc6dec26db22a97f00523a4bfd3a97d72'>Diffstat</a></div><table summary='diffstat' class='diffstat'>