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/*
* scamper_ping.h
*
* $Id: scamper_ping.h,v 1.12 2006/12/12 01:16:03 mjl Exp $
*
* Copyright (C) 2005-2006 The University of Waikato
*
* 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, version 2.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SCAMPER_PING_H
#define __SCAMPER_PING_H
#define SCAMPER_PING_REPLY_IS_ICMP_ECHO_REPLY(reply) ( \
(reply->addr->type == SCAMPER_ADDR_TYPE_IPV4 && reply->icmp_type == 0) || \
(reply->addr->type == SCAMPER_ADDR_TYPE_IPV6 && reply->icmp_type == 129))
#define SCAMPER_PING_REPLY_IS_ICMP_UNREACH(reply) ( \
(reply->addr->type == SCAMPER_ADDR_TYPE_IPV4 && reply->icmp_type == 3) || \
(reply->addr->type == SCAMPER_ADDR_TYPE_IPV6 && reply->icmp_type == 1))
#define SCAMPER_PING_REPLY_IS_ICMP_TTL_EXP(reply) ( \
(reply->addr->af == SCAMPER_ADDR_TYPE_IPV4 && reply->icmp_type == 11) || \
(reply->addr->af == SCAMPER_ADDR_TYPE_IPV6 && reply->icmp_type == 3))
#define SCAMPER_PING_STOP_NONE 0x00 /* null reason */
#define SCAMPER_PING_STOP_COMPLETED 0x01 /* sent all probes */
#define SCAMPER_PING_STOP_ERROR 0x02 /* error occured during ping */
#define SCAMPER_PING_REPLY_FLAG_REPLY_TTL 0x01 /* reply ttl included */
/*
* scamper_ping_reply
*
* a ping reply structure keeps track of how a ping packet was responded to.
* the default structure has enough fields for interesting pieces out of an
* echo reply packet.
*
* if the icmp type/code is not an ICMP echo reply packet, then the TLVs
* defined above may be present in the response.
*/
typedef struct scamper_ping_reply
{
/* where the response came from */
scamper_addr_t *addr;
/* flags defined by SCAMPER_PING_REPLY_FLAG_* */
uint8_t flags;
/* the TTL / size of the packet that is returned */
uint8_t reply_ttl;
uint16_t reply_size;
uint16_t probe_id;
/* the icmp type / code returned */
uint8_t icmp_type;
uint8_t icmp_code;
/* the time elapsed between sending the probe and getting this response */
struct timeval rtt;
/* if a single probe gets more than one response, they get chained */
struct scamper_ping_reply *next;
} scamper_ping_reply_t;
/*
* scamper_ping
*
* this structure contains details of a ping between a source and a
* destination. is specifies the parameters to the ping and the
* replies themselves.
*/
typedef struct scamper_ping
{
/* the list / cycle that this ping is in relation to */
scamper_list_t *list;
scamper_cycle_t *cycle;
/* source and destination addresses of the ping */
scamper_addr_t *src;
scamper_addr_t *dst;
/* when the ping started */
struct timeval start;
/* why the ping finished */
uint8_t stop_reason;
uint8_t stop_data;
/* the pattern to use inside of a probe. if null then all zeros */
uint16_t pattern_len; /* -p option to ping */
uint8_t *pattern_bytes;
/* ping options */
uint16_t probe_count; /* -c option to ping */
uint16_t probe_size; /* -s option to ping */
uint8_t probe_wait; /* -i option to ping */
uint8_t probe_ttl; /* -m option to ping */
uint8_t probe_tos; /* -z option to ping */
uint16_t reply_count; /* -o option to ping */
/* actual data collected with the ping */
scamper_ping_reply_t **ping_replies;
uint16_t ping_sent;
} scamper_ping_t;
/* basic routines to allocate and free scamper_ping structures */
scamper_ping_t *scamper_ping_alloc(void);
void scamper_ping_free(scamper_ping_t *ping);
int scamper_ping_setpattern(scamper_ping_t *ping,uint8_t *bytes,uint16_t len);
/* utility function for allocating an array for recording replies */
int scamper_ping_replies_alloc(scamper_ping_t *ping, int count);
/* basic routines to allocate and free scamper_ping_reply structures */
scamper_ping_reply_t *scamper_ping_reply_alloc(void);
void scamper_ping_reply_free(scamper_ping_reply_t *reply);
int scamper_ping_reply_append(scamper_ping_t *p, scamper_ping_reply_t *reply);
uint32_t scamper_ping_reply_count(const scamper_ping_t *ping);
/* routine to return basic stats for the measurement */
int scamper_ping_stats(const scamper_ping_t *ping,
uint32_t *nreplies, uint32_t *ndups, uint16_t *nloss,
struct timeval *min_rtt, struct timeval *max_rtt,
struct timeval *avg_rtt, struct timeval *stddev_rtt);
#endif /* __SCAMPER_PING_H */
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