/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009 - 2013 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

#include "pcap_io.h"
#include "built_in.h"
#include "die.h"
#include "iosched.h"
#include "ioops.h"

static ssize_t pcap_rw_write(int fd, pcap_pkthdr_t *phdr, enum pcap_type type,
			     const uint8_t *packet, size_t len)
{
	ssize_t ret, hdrsize = pcap_get_hdr_length(phdr, type), hdrlen = 0;

	ret = write_or_die(fd, &phdr->raw, hdrsize);
	if (unlikely(ret != hdrsize))
		panic("Failed to write pkt header!\n");

	hdrlen = pcap_get_length(phdr, type);
	if (unlikely(hdrlen != (ssize_t) len))
		return -EINVAL;

	ret = write_or_die(fd, packet, hdrlen);
	if (unlikely(ret != hdrlen))
		panic("Failed to write pkt payload!\n");

	return hdrsize + hdrlen;
}

static ssize_t pcap_rw_read(int fd, pcap_pkthdr_t *phdr, enum pcap_type type,
			    uint8_t *packet, size_t len)
{
	ssize_t ret, hdrsize = pcap_get_hdr_length(phdr, type), hdrlen = 0;

	ret = read_or_die(fd, &phdr->raw, hdrsize);
	if (unlikely(ret != hdrsize))
		return -EIO;

	hdrlen = pcap_get_length(phdr, type);
	if (unlikely(hdrlen == 0 || hdrlen > (ssize_t) len))
                return -EINVAL;

	ret = read(fd, packet, hdrlen);
	if (unlikely(ret != hdrlen))
		return -EIO;

	return hdrsize + hdrlen;
}

static void pcap_rw_init_once(bool enforce_prio)
{
	if (enforce_prio)
		set_ioprio_rt();
}

static void pcap_rw_fsync(int fd)
{
	fdatasync(fd);
}

const struct pcap_file_ops pcap_rw_ops = {
	.init_once_pcap = pcap_rw_init_once,
	.pull_fhdr_pcap = pcap_generic_pull_fhdr,
	.push_fhdr_pcap = pcap_generic_push_fhdr,
	.read_pcap = pcap_rw_read,
	.write_pcap = pcap_rw_write,
	.fsync_pcap = pcap_rw_fsync,
};
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/men-chameleon-bus.txt?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14'>men-chameleon-bus.txt</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='08b15d13864279aae10443c48cb268d823895b14'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' 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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-04-10 17:48:17 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-04-10 17:48:17 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/men-chameleon-bus.txt?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14'>08b15d13864279aae10443c48cb268d823895b14</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/men-chameleon-bus.txt?id=08b15d13864279aae10443c48cb268d823895b14'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/men-chameleon-bus.txt?h=nds-private-remove&amp;id=2f422f94eea83f50755df76be8f5ff86ef89ad80'>2f422f94eea83f50755df76be8f5ff86ef89ad80</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/men-chameleon-bus.txt?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14&amp;id2=2f422f94eea83f50755df76be8f5ff86ef89ad80'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/men-chameleon-bus.txt?h=nds-private-remove&amp;id=208fae5c3b9431013ad7bcea07cbcee114e7d163'>208fae5c3b9431013ad7bcea07cbcee114e7d163</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/men-chameleon-bus.txt?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14&amp;id2=208fae5c3b9431013ad7bcea07cbcee114e7d163'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm</div><div class='commit-msg'>Pull ARM fixes from Russell King:
 "A couple of small fixes, and wiring up the new syscalls which appeared
  during the merge window"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8550/1: protect idiv patching against undefined gcc behavior
  ARM: wire up preadv2 and pwritev2 syscalls
  ARM: SMP enable of cache maintanence broadcast
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=08b15d13864279aae10443c48cb268d823895b14'>Diffstat</a> (limited to 'Documentation/men-chameleon-bus.txt')</div><table summary='diffstat' class='diffstat'>