/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/*
 * Copyright 2024 Bill Sommerfeld <sommerfeld@hamachi.org>
 */


#ifndef _PING_H
#define _PING_H

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>

#ifdef __cplusplus
extern "C" {
#endif

#define MAX_PORT        65535   /* max port number for UDP probes */
#define MAX_ICMP_SEQ    65535   /* max icmp sequence value */

/*
 * Maximum number of source route space. Please note that because of the API,
 * we can only specify 8 gateways, the last address has to be the target
 * address.
 */
#define MAX_GWS         9

/*
 * This is the max it can be. But another limiting factor is the PMTU,
 * so in any instance, it can be less than 127.
 */
#define MAX_GWS6        127

/* maximum of above two */
#define MAXMAX_GWS      MAX(MAX_GWS, MAX_GWS6)

/* size of buffer to store the IPv4 gateway addresses */
#define ROUTE_SIZE      (IPOPT_OLEN + IPOPT_OFFSET + \
                        MAX_GWS * sizeof (struct in_addr))

#define A_CNT(ARRAY) (sizeof (ARRAY) / sizeof ((ARRAY)[0]))


#define Printf (void) printf
#define Fprintf (void) fprintf

#define TIMEFORMAT "%#.3f"


/*
 * For each target IP address we are going to probe, we store required info,
 * such as address family, IP address of target, source IP address to use
 * for that target address, and number of probes to send in the targetaddr
 * structure.
 * All target addresses are also linked to each other and used in
 * scheduling probes. Each targetaddr structure identifies a batch of probes to
 * send : where to send, how many to send. We capture state information, such as
 * number of probes already sent (in this batch only), whether target replied
 * as we probe it, whether we are done with probing this address (can happen
 * in regular (!stats) mode when we get a reply for a probe sent in current
 * batch), and starting sequence number which is used together with number of
 * probes sent to determine if the incoming reply is for a probe we sent in
 * current batch.
 */
struct targetaddr {
        int family;
        union any_in_addr dst_addr;     /* dst address for the probe */
        union any_in_addr src_addr;     /* src addr to use for this dst addr */
        int dst_scope;                  /* scope of dst addr or zero */
        int num_probes;                 /* num of probes to send to this dst */
        int num_sent;                   /* number of probes already sent */
        boolean_t got_reply;            /* received a reply from dst while */
                                        /* still probing it */
        boolean_t probing_done;         /* skip without sending all probes */
        ushort_t starting_seq_num;      /* initial icmp_seq/UDP port, used */
                                        /* for authenticating replies */
        struct targetaddr *next;        /* next targetaddr item in the list */
};

struct hostinfo {
        char *name;                     /* hostname */
        int family;                     /* address family */
        int num_addr;                   /* number of addresses */
        union any_in_addr *addrs;       /* address list */
};

struct icmptype_table {
        int type;               /* ICMP type */
        char *message;          /* corresponding string message */
};

extern struct targetaddr *current_targetaddr;
extern int nreceived;
extern int nreceived_last_target;
extern int npackets;
extern boolean_t is_alive;
extern int datalen;
extern boolean_t nflag;
extern int ident;
extern boolean_t probe_all;
extern char *progname;
extern boolean_t rr_option;
extern boolean_t stats;
extern boolean_t strict;
extern char *targethost;
extern long long tmax;
extern long long tmin;
extern int ts_flag;
extern boolean_t ts_option;
extern int64_t tsum;
extern int64_t tsum2;
extern boolean_t use_icmp_ts;
extern boolean_t use_udp;
extern boolean_t verbose;
extern boolean_t send_reply;

extern void ping_gettime(struct msghdr *, struct timeval *);
extern void set_ancillary_data(struct msghdr *, int, union any_in_addr *,
    int, uint_t);
extern void check_reply(struct addrinfo *, struct msghdr *, int, ushort_t);
extern void check_reply6(struct addrinfo *, struct msghdr *, int, ushort_t);
extern void find_dstaddr(ushort_t, union any_in_addr *);
extern boolean_t is_a_target(struct addrinfo *, union any_in_addr *);
extern char *pr_if(int);
extern char *pr_name(char *, int);
extern char *pr_name_sa(const struct sockaddr *);
extern char *pr_name4(const struct sockaddr_in *);
extern char *pr_name6(const struct sockaddr_in6 *);
extern char *pr_protocol(int);
extern void schedule_sigalrm(void);
extern void send_scheduled_probe(void);
extern boolean_t seq_match(ushort_t, int, ushort_t);
extern void set_IPv4_options(int, union any_in_addr *, int, struct in_addr *,
    struct in_addr *);
extern void sigalrm_handler();
extern void tvsub(struct timeval *, struct timeval *);
#ifdef __cplusplus
}
#endif

#endif /* _PING_H */