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/*
* Copyright 2013 Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: ncardwell@google.com (Neal Cardwell)
*
* Interface for module for formatting IP packets.
*/
#ifndef __IP_PACKET_H__
#define __IP_PACKET_H__
#include "types.h"
#include "packet.h"
/* Populate header fields in the IP header at the given address. */
extern void set_ip_header(void *ip_header,
int address_family,
u16 ip_bytes,
u8 tos, u32 flowlabel,
u8 ttl, u8 protocol);
/* Set the packet's IP header pointer and then populate the IP header fields. */
extern void set_packet_ip_header(struct packet *packet,
int address_family,
u16 ip_bytes,
u8 tos, u32 flowlabel,
u8 ttl, u8 protocol);
/* Append an IPv4 header to the end of the given packet and fill in
* src/dst. On success, return STATUS_OK; on error return STATUS_ERR
* and fill in a malloc-allocated error message in *error.
*/
extern int ipv4_header_append(struct packet *packet,
const char *ip_src,
const char *ip_dst,
const u8 tos,
const u8 ttl,
char **error);
/* Append an IPv6 header to the end of the given packet and fill in
* src/dst. On success, return STATUS_OK; on error return STATUS_ERR
* and fill in a malloc-allocated error message in *error.
*/
extern int ipv6_header_append(struct packet *packet,
const char *ip_src,
const char *ip_dst,
const u8 tos,
const u8 hop_limit,
char **error);
/* Finalize the IPv4 header by filling in all necessary fields that
* were not filled in at parse time.
*/
extern int ipv4_header_finish(struct packet *packet,
struct header *header, struct header *next_inner);
/* Finalize the IPv6 header by filling in all necessary fields that
* were not filled in at parse time.
*/
extern int ipv6_header_finish(struct packet *packet,
struct header *header, struct header *next_inner);
#endif /* __IP_PACKET_H__ */
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