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/******************************************************************************
* Copyright (c) 2004, 2007 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#ifndef _ICMP_H_
#define _ICMP_H_
#include <netlib/netlib.h>
/* RFC 792 - Internet Control Message Protocol
http://www.faqs.org/rfcs/rfc792.html
Summary of Message Types
0 Echo Reply
3 Destination Unreachable
4 Source Quench
5 Redirect
8 Echo
11 Time Exceeded
12 Parameter Problem
13 Timestamp
14 Timestamp Reply
15 Information Request
16 Information Reply
*/
#define PROTO_ICMP 1
#define ICMP_TYPE_DEST_UNREACHABLE 3
#define ICMP_NET_UNREACHABLE 0
#define ICMP_HOST_UNREACHABLE 1
#define ICMP_PROTOCOL_UNREACHABLE 2
#define ICMP_PORT_UNREACHABLE 3
#define ICMP_FRAGMENTATION_NEEDED 4
#define ICMP_SOURCE_ROUTE_FAILED 5
struct icmphdr {
unsigned char type;
unsigned char code;
unsigned short int checksum;
union {
/* for type 3 "Destination Unreachable" */
unsigned int unused;
/* for type 0 and 8 */
struct echo {
unsigned short int id;
unsigned short int seq;
} echo;
} options;
union {
/* payload for destination unreachable */
struct dun {
unsigned char iphdr[20];
unsigned char data[64];
} dun;
/* payload for echo or echo reply */
/* maximum size supported is 84 */
unsigned char data[84];
} payload;
};
int handle_icmp(struct icmphdr *);
int echo_request(int, filename_ip_t *, unsigned int);
#endif /* _ICMP_H_ */
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