/*
 * 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 "xutils.h"
#include "xio.h"
#include "die.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 != 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 > len))
                return -EINVAL;

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

	return hdrsize + hdrlen;
}

static void pcap_rw_init_once(void)
{
	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='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=7892032cfe67f4bde6fc2ee967e45a8fbaf33756&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-05 17:23:04 -0500'>2017-02-05</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=7892032cfe67f4bde6fc2ee967e45a8fbaf33756'>ip6_gre: fix ip6gre_err() invalid reads</a></td><td>Eric Dumazet</td><td>1</td><td><span class='deletions'>-19</span>/<span class='insertions'>+21</span></td></tr>
<tr><td><span title='2017-02-04 19:44:22 -0500'>2017-02-04</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=d71b7896886345c53ef1d84bda2bc758554f5d61'>netlabel: out of bound access in cipso_v4_validate()</a></td><td>Eric Dumazet</td><td>2</td><td><span class='deletions'>-0</span>/<span class='insertions'>+8</span></td></tr>
<tr><td><span title='2017-02-04 19:42:28 -0500'>2017-02-04</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=34b2cef20f19c87999fff3da4071e66937db9644'>ipv4: keep skb-&gt;dst around in presence of IP options</a></td><td>Eric Dumazet</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+8</span></td></tr>
<tr><td><span title='2017-02-03 16:11:07 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=5fa8bbda38c668e56b0c6cdecced2eac2fe36dec'>net: use a work queue to defer net_disable_timestamp() work</a></td><td>Eric Dumazet</td><td>1</td><td><span class='deletions'>-18</span>/<span class='insertions'>+13</span></td></tr>
<tr><td><span title='2017-02-03 11:13:00 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=3808d34838184fd29088d6b3a364ba2f1c018fb6'>ethtool: do not vzalloc(0) on registers dump</a></td><td>Stanislaw Gruszka</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-03 11:05:23 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=013e8167899d389075160412a8c0c5e0581e1f13'>ipv6: sr: remove cleanup flag and fix HMAC computation</a></td><td>David Lebrun</td><td>3</td><td><span class='deletions'>-38</span>/<span class='insertions'>+10</span></td></tr>
<tr><td><span title='2017-02-02 22:59:43 -0500'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=cafe8df8b9bc9aa3dffa827c1a6757c6cd36f657'>net: phy: Fix lack of reference count on PHY driver</a></td><td>Mao Wenan