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

#ifndef RING_H
#define RING_H

/*
 * "I love the smell of 10GbE in the morning. Smells like ... victory."
 *     - W. Richard Stevens, "Secret Teachings of the UNIX Environment"
 */

#include <stdio.h>
#include <stdint.h>
#include <linux/if_packet.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
#include <string.h>
#include <poll.h>
#include <sys/poll.h>

#include "xutils.h"
#include "built_in.h"
#include "die.h"

#ifndef PACKET_FANOUT
# define PACKET_FANOUT			18
# define PACKET_FANOUT_POLICY_HASH	0
# define PACKET_FANOUT_POLICY_LB	1
# define PACKET_FANOUT_POLICY_DEFAULT	PACKET_FANOUT_HASH
#endif

struct frame_map {
	struct tpacket2_hdr tp_h __aligned_tpacket;
	struct sockaddr_ll s_ll __align_tpacket(sizeof(struct tpacket2_hdr));
};

struct ring {
	struct iovec *frames;
	uint8_t *mm_space;
	size_t mm_len;
	struct tpacket_req layout;
	struct sockaddr_ll s_ll;
};

static inline void next_rnd_slot(unsigned int *it, struct ring *ring)
{
	*it = rand() % ring->layout.tp_frame_nr;
}

#define RING_SIZE_FALLBACK (1 << 26)

static inline unsigned int ring_size(char *ifname, unsigned int size)
{
	if (size > 0)
		return size;

	/*
	 * Device bitrate in bytes times two as ring size.
	 *    Fallback => ~    64,00 MB
	 *     10 MBit => ~     2,38 MB
	 *     54 MBit => ~    12,88 MB
	 *    100 MBit => ~    23,84 MB
	 *    300 MBit => ~    71,52 MB
	 *  1.000 MBit => ~   238,42 MB
	 * 10.000 MBit => ~ 2.384.18 MB
	 */
	size = device_bitrate(ifname);
	size = (size * 1000000) / 8;
	size = size * 2;
	if (size == 0)
		size = RING_SIZE_FALLBACK;

	return round_up_cacheline(size);
}

static inline unsigned int ring_frame_size(struct ring *ring)
{
	return ring->layout.tp_frame_size;
}

static inline void tpacket_hdr_clone(struct tpacket2_hdr *thdrd,
				     struct tpacket2_hdr *thdrs)
{
        thdrd->tp_sec = thdrs->tp_sec;
        thdrd->tp_nsec = thdrs->tp_nsec;
        thdrd->tp_snaplen = thdrs->tp_snaplen;
        thdrd->tp_len = thdrs->tp_len;
}

#ifndef POLLRDNORM
# define POLLRDNORM	0x0040
#endif
#ifndef POLLWRNORM
# define POLLWRNORM	0x0100
#endif
#ifndef POLLRDHUP
# define POLLRDHUP	0x2000
#endif

#define POLL_NEXT_PKT	0
#define POLL_MOVE_OUT	1

static inline void prepare_polling(int sock, struct pollfd *pfd)
{
	memset(pfd, 0, sizeof(*pfd));
	pfd->fd = sock;
	pfd->revents = 0;
	pfd->events = POLLIN | POLLRDNORM | POLLERR;
}

static inline void set_sockopt_fanout(int sock, unsigned int fanout_id,
				      unsigned int fanout_type)
{
	unsigned int fanout_arg = (fanout_id | (fanout_type << 16));
	int ret = setsockopt(sock, SOL_PACKET, PACKET_FANOUT, &fanout_arg,
			     sizeof(fanout_arg));
	if (ret)
		panic("No packet fanout support!\n");
}

static inline void set_sockopt_tpacket(int sock)
{
	int ret, val = TPACKET_V2;

	ret = setsockopt(sock, SOL_PACKET, PACKET_VERSION, &val, sizeof(val));
	if (ret)
		panic("Cannot set tpacketv2!\n");
}

#ifdef __WITH_HARDWARE_TIMESTAMPING
# include <linux/net_tstamp.h>

static inline int set_sockopt_hwtimestamp(int sock, const char *dev)
{
	int timesource, ret;
	struct hwtstamp_config hwconfig;
	struct ifreq ifr;

	if (!strncmp("any", dev, strlen("any")))
		return -1;

	memset(&hwconfig, 0, sizeof(hwconfig));
	hwconfig.tx_type = HWTSTAMP_TX_ON;
	hwconfig.rx_filter = HWTSTAMP_FILTER_ALL;

	memset(&ifr, 0, sizeof(ifr));
	strlcpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
	ifr.ifr_data = &hwconfig;

	ret = ioctl(sock, SIOCSHWTSTAMP, &ifr);
	if (ret < 0)
		return -1;

	timesource = SOF_TIMESTAMPING_RAW_HARDWARE;

	return setsockopt(sock, SOL_PACKET, PACKET_TIMESTAMP, &timesource,
			  sizeof(timesource));
}
#else
static inline int set_sockopt_hwtimestamp(int sock, const char *dev)
{
	return -1;
}
#endif
#endif /* RING_H */
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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-04-23 11:20:03 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-04-23 11:20:03 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=68dc08b5802f606b5b50dde558533b643b6d9526'>68dc08b5802f606b5b50dde558533b643b6d9526</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation?id=68dc08b5802f606b5b50dde558533b643b6d9526'>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=68dc08b5802f606b5b50dde558533b643b6d9526'>2c7a58cdd4f5dc7e4571e47aa1d75bf41c43ac60</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation?h=nds-private-remove&amp;id=68dc08b5802f606b5b50dde558533b643b6d9526'>Documentation</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=8e3ae37acca382b3050d6e8e413520d386e0d6ee'>8e3ae37acca382b3050d6e8e413520d386e0d6ee</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?h=nds-private-remove&amp;id=68dc08b5802f606b5b50dde558533b643b6d9526&amp;id2=8e3ae37acca382b3050d6e8e413520d386e0d6ee'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=d40d334743776937132d3a0c5a203d245407e5a7'>d40d334743776937132d3a0c5a203d245407e5a7</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?h=nds-private-remove&amp;id=68dc08b5802f606b5b50dde558533b643b6d9526&amp;id2=d40d334743776937132d3a0c5a203d245407e5a7'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'usb-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb</div><div class='commit-msg'>Pull USB / PHY driver fixes from Greg KH:
 "Here are two small sets of patches, both from subsystem trees, USB
  gadget and PHY drivers.

  Full details are in the shortlog, and they have all been in linux-next
  for a while (before I merged them to the USB tree)"

* tag 'usb-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: gadget: f_fs: Fix use-after-free
  usb: dwc3: gadget: Fix suspend/resume during device mode
  usb: dwc3: fix memory leak of dwc-&gt;regset
  usb: dwc3: core: fix PHY handling during suspend
  usb: dwc3: omap: fix up error path on probe()
  usb: gadget: composite: Clear reserved fields of SSP Dev Cap
  phy: rockchip-emmc: adapt binding to specifiy register offset and length
  phy: rockchip-emmc: should be a child device of the GRF
  phy: rockchip-dp: should be a child device of the GRF
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=68dc08b5802f606b5b50dde558533b643b6d9526'>Diffstat</a> (limited to 'Documentation')</div><table summary='diffstat' class='diffstat'>