/*
 * netsniff-ng - the packet sniffing beast
 * Subject to the GPL, version 2.
 */

#include <stdbool.h>
#include <netinet/in.h>

#include "die.h"
#include "csum.h"
#include "built_in.h"
#include "trafgen_l3.h"
#include "trafgen_l4.h"
#include "trafgen_conf.h"
#include "trafgen_proto.h"

static struct proto_field udp_fields[] = {
	{ .id = UDP_SPORT,	.len = 2,	.offset = 0 },
	{ .id = UDP_DPORT,	.len = 2,	.offset = 2 },
	{ .id = UDP_LEN,	.len = 2,	.offset = 4 },
	{ .id = UDP_CSUM,	.len = 2,	.offset = 6 },
};

static struct proto_field tcp_fields[] = {
	{ .id = TCP_SPORT,   .len = 2, .offset = 0 },
	{ .id = TCP_DPORT,   .len = 2, .offset = 2 },
	{ .id = TCP_SEQ,     .len = 4, .offset = 4 },
	{ .id = TCP_ACK_SEQ, .len = 4, .offset = 8 },
	{ .id = TCP_DOFF,    .len = 2, .offset = 12, .shift = 12, .mask = 0xf000 },
	/* reserved (4 bits) */
	{ .id = TCP_CWR,     .len = 2, .offset = 12, .shift = 7, .mask = 0x0080 },
	{ .id = TCP_ECE,     .len = 2, .offset = 12, .shift = 6, .mask = 0x0040 },
	{ .id = TCP_URG,     .len = 2, .offset = 12, .shift = 5, .mask = 0x0020 },
	{ .id = TCP_ACK,     .len = 2, .offset = 12, .shift = 4, .mask = 0x0010 },
	{ .id = TCP_PSH,     .len = 2, .offset = 12, .shift = 3, .mask = 0x0008 },
	{ .id = TCP_RST,     .len = 2, .offset = 12, .shift = 2, .mask = 0x0004 },
	{ .id = TCP_SYN,     .len = 2, .offset = 12, .shift = 1, .mask = 0x0002 },
	{ .id = TCP_FIN,     .len = 2, .offset = 12, .shift = 0, .mask = 0x0001 },
	{ .id = TCP_WINDOW,  .len = 2, .offset = 14 },
	{ .id = TCP_CSUM,    .len = 2, .offset = 16 },
	{ .id = TCP_URG_PTR, .len = 2, .offset = 18 },
};

static void udp_header_init(struct proto_hdr *hdr)
{
	proto_lower_default_add(hdr, PROTO_IP4);

	proto_header_fields_add(hdr, udp_fields, array_size(udp_fields));
}

static void udp_packet_finish(struct proto_hdr *hdr)
{
	struct proto_hdr *lower = proto_lower_header(hdr);
	struct packet *pkt = current_packet();
	uint16_t total_len;
	uint16_t csum;

	total_len = pkt->len - hdr->pkt_offset;
	proto_field_set_default_be16(hdr, UDP_LEN, total_len);

	if (proto_field_is_set(hdr, UDP_CSUM))
		return;

	if (!lower || lower->id != PROTO_IP4)
		return;

	total_len = proto_field_get_u16(hdr, UDP_LEN);
	csum = p4_csum((void *) proto_header_ptr(lower), proto_header_ptr(hdr),
			total_len, IPPROTO_UDP);

	proto_field_set_be16(hdr, UDP_CSUM, bswap_16(csum));
}

static struct proto_hdr udp_hdr = {
	.id		= PROTO_UDP,
	.layer		= PROTO_L4,
	.header_init	= udp_header_init,
	.packet_finish  = udp_packet_finish,
};

static void tcp_header_init(struct proto_hdr *hdr)
{
	proto_lower_default_add(hdr, PROTO_IP4);

	proto_header_fields_add(hdr, tcp_fields, array_size(tcp_fields));

	proto_field_set_default_be16(hdr, TCP_DOFF, 5);
}

static void tcp_packet_finish(struct proto_hdr *hdr)
{
	struct proto_hdr *lower = proto_lower_header(hdr);
	struct packet *pkt = current_packet();
	uint16_t total_len;
	uint16_t csum;

	if (proto_field_is_set(hdr, TCP_CSUM))
		return;

	if (!lower || lower->id != PROTO_IP4)
		return;

	total_len = pkt->len - hdr->pkt_offset;
	csum = p4_csum((void *) proto_header_ptr(lower), proto_header_ptr(hdr),
			total_len, IPPROTO_TCP);

	proto_field_set_be16(hdr, TCP_CSUM, bswap_16(csum));
}

static struct proto_hdr tcp_hdr = {
	.id		= PROTO_TCP,
	.layer		= PROTO_L4,
	.header_init	= tcp_header_init,
	.packet_finish  = tcp_packet_finish,
};

void protos_l4_init(void)
{
	proto_header_register(&udp_hdr);
	proto_header_register(&tcp_hdr);
}
ion><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>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2016-10-20 15:44:19 +0200</td></tr>
<tr><th>committer</th><td>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2017-02-15 10:34:18 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/arch/m68k/Kconfig.devices?h=nds-private-remove&amp;id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>5db4992d8f040b8d8db0b86d42806e0c417f7ccf</a> (<a href='/cgit.cgi/linux/net-next.git/patch/arch/m68k/Kconfig.devices?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>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'>5b06e952af482d45f3ade64e77824662e34b7fa2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/arch/m68k/Kconfig.devices?h=nds-private-remove'>arch/m68k/Kconfig.devices</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/arch/m68k/Kconfig.devices?h=nds-private-remove&amp;id=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>370ebb0ef6255132373ed35d13e7b1d8d2eb7003</a> (<a href='/cgit.cgi/linux/net-next.git/diff/arch/m68k/Kconfig.devices?h=nds-private-remove&amp;id2=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>diff</a>)</td></tr></table>
<div class='commit-subject'>usbnet: pegasus: Use net_device_stats from struct net_device<span class='decoration'><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/arch/m68k/Kconfig.devices?h=nds-private-remove'>nds-private-remove</a></span></div><div class='commit-msg'>Instead of using a private copy of struct net_device_stats in struct
pegasus, use stats from struct net_device. Also remove the now
unnecessary .ndo_get_stats function.

Cc: Petko Manolov &lt;petkan@nucleusys.com&gt;
Cc: linux-usb@vger.kernel.org
Signed-off-by: Tobias Klauser &lt;tklauser@distanz.ch&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove'>Diffstat</a> (limited to 'arch/m68k/Kconfig.devices')</div><table summary='diffstat' class='diffstat'>