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icmp.h

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/*!     \file include/net/icmp.h
 *      \brief ICMP (Internet Control Message Protocol) layer header.
 *      \author Andrea Righi <drizzt@inwind.it>
 *      \date Last update: 2003-11-09
 *      \note Copyright (&copy;) 2003 Andrea Righi
 */

#ifndef ICMP_H
#define ICMP_H

#include <net/ip.h>

/** \ingroup Network
 *  \defgroup NetICMP ICMP (Internet Control Message Protocol) layer
 *  The ICMP (Internet Control Message Protocol) layer.
 *  @{
 */

//! Echo Reply.
#define ICMP_ECHOREPLY          0
//! Destination Unreachable.
#define ICMP_DEST_UNREACH       3
//! Source Quench.
#define ICMP_SOURCE_QUENCH      4
//! Redirect (change route).
#define ICMP_REDIRECT           5
//! Echo Request.
#define ICMP_ECHO               8
//! Time Exceeded.
#define ICMP_TIME_EXCEEDED      11
//! Parameter Problem.
#define ICMP_PARAMETERPROB      12
//! Timestamp Request.
#define ICMP_TIMESTAMP          13
//! Timestamp Reply.
#define ICMP_TIMESTAMPREPLY     14
//! Information Request.
#define ICMP_INFO_REQUEST       15
//! Information Reply.
#define ICMP_INFO_REPLY         16
//! Address Mask Request.
#define ICMP_ADDRESS            17
//! Address Mask Reply.
#define ICMP_ADDRESSREPLY       18

//! Network Unreachable.
#define ICMP_NET_UNREACH        0
//! Host Unreachable.
#define ICMP_HOST_UNREACH       1
//! Protocol Unreachable.
#define ICMP_PROT_UNREACH       2
//! Port Unreachable.
#define ICMP_PORT_UNREACH       3
//! Fragmentation Needed/DF set.
#define ICMP_FRAG_NEEDED        4
//! Source Route failed.
#define ICMP_SR_FAILED          5
//! Network Unknown.
#define ICMP_NET_UNKNOWN        6
//! Host Unknown.
#define ICMP_HOST_UNKNOWN       7
//! Host isolated.
#define ICMP_HOST_ISOLATED      8

#define ICMP_NET_ANO            9
#define ICMP_HOST_ANO           10
#define ICMP_NET_UNR_TOS        11
#define ICMP_HOST_UNR_TOS       12

//! Packet Filtered.
#define ICMP_PKT_FILTERED       13
//! Precedence Violation.
#define ICMP_PREC_VIOLATION     14
//! Precedence Cut Off.
#define ICMP_PREC_CUTOFF        15

//! Redirect Net.
#define ICMP_REDIR_NET          0
//! Redirect Host.
#define ICMP_REDIR_HOST         1
//! Redirect Net for TOS.
#define ICMP_REDIR_NETTOS       2
//! Redirect Host for TOS.
#define ICMP_REDIR_HOSTTOS      3

//! TTL cound exceeded.
#define ICMP_EXC_TTL            0
//! Fragment Reass Time exceeeded.
#define ICMP_EXC_FRAGTIME       1

//! ICMP packet structure.
typedef struct icmp
{
        //! ICMP message type.
        uint8_t icmp_type;
        //! ICMP operation code.
        uint8_t icmp_code;
        //! ICMP checksum.
        uint16_t icmp_chk;
} __attribute__ ((packed)) icmp_t;

//! ICMP::PING packet structure.
typedef struct icmp_ping
{
        //! The ICMP header.
        icmp_t ping_icmp;
        //! The PING id.
        uint16_t ping_id;
        //! The PING sequence number.
        uint16_t ping_seq;
} __attribute__ ((packed)) icmp_ping_t;

// --- Prototypes ----------------------------------------------------- //

void to_icmp_layer(ip_t *packet);
int send_icmp_packet(in_addr_t ip_to, uint8_t message, uint8_t *data, size_t len);
void ping(char *ip_dot);

/** @} */ // end of NetICMP

#endif

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