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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <linux/sockios.h>
#include <sys/file.h>
#include <sys/time.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <sys/uio.h>
#include <sys/poll.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <linux/errqueue.h>
#define DEFDATALEN (64 - 8) /* default data length */
#define MAXWAIT 10 /* max seconds to wait for response */
#define MININTERVAL 10 /* Minimal interpacket gap */
#define MINUSERINTERVAL 200 /* Minimal allowed interval for non-root */
#define SCHINT(a) (((a) <= MININTERVAL) ? MININTERVAL : (a))
#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
#define SET(bit) (A(bit) |= B(bit))
#define CLR(bit) (A(bit) &= (~B(bit)))
#define TST(bit) (A(bit) & B(bit))
/* various options */
extern int options;
#define F_FLOOD 0x001
#define F_INTERVAL 0x002
#define F_NUMERIC 0x004
#define F_PINGFILLED 0x008
#define F_QUIET 0x010
#define F_RROUTE 0x020
#define F_SO_DEBUG 0x040
#define F_SO_DONTROUTE 0x080
#define F_VERBOSE 0x100
#define F_TIMESTAMP 0x200
#define F_FLOWINFO 0x200
#define F_SOURCEROUTE 0x400
#define F_TCLASS 0x400
#define F_FLOOD_POLL 0x800
#define F_LATENCY 0x1000
#define F_AUDIBLE 0x2000
#define F_ADAPTIVE 0x4000
#define F_STRICTSOURCE 0x8000
#define F_NOLOOP 0x10000
#define F_TTL 0x20000
/*
* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
* number of received sequence numbers we can keep track of.
*/
#define MAX_DUP_CHK 0x10000
extern int mx_dup_ck;
extern char rcvd_tbl[MAX_DUP_CHK / 8];
extern u_char outpack[];
extern int maxpacket;
extern int datalen;
extern char *hostname;
extern int uid;
extern int ident; /* process id to identify our packets */
extern int sndbuf;
extern int ttl;
extern long npackets; /* max packets to transmit */
extern long nreceived; /* # of packets we got back */
extern long nrepeats; /* number of duplicates */
extern long ntransmitted; /* sequence # for outbound packets = #sent */
extern long nchecksum; /* replies with bad checksum */
extern long nerrors; /* icmp errors */
extern int interval; /* interval between packets (msec) */
extern int preload;
extern int deadline; /* time to die */
extern int lingertime;
extern struct timeval start_time, cur_time;
extern volatile int exiting;
extern volatile int status_snapshot;
extern int confirm;
extern int confirm_flag;
extern int working_recverr;
#ifndef MSG_CONFIRM
#define MSG_CONFIRM 0
#endif
/* timing */
extern int timing; /* flag to do timing */
extern long tmin; /* minimum round trip time */
extern long tmax; /* maximum round trip time */
extern long long tsum; /* sum of all times, for doing average */
extern long long tsum2;
extern int rtt;
extern __u16 acked;
extern int pipesize;
#define COMMON_OPTIONS \
case 'a': case 'U': case 'c': case 'd': \
case 'f': case 'i': case 'w': case 'l': \
case 'S': case 'n': case 'p': case 'q': \
case 'r': case 's': case 'v': case 'L': \
case 't': case 'A': case 'W': case 'B':
#define COMMON_OPTSTR "h?VQ:I:M:aUc:dfi:w:l:S:np:qrs:vLt:AW:B"
/*
* tvsub --
* Subtract 2 timeval structs: out = out - in. Out is assumed to
* be >= in.
*/
static inline void tvsub(struct timeval *out, struct timeval *in)
{
if ((out->tv_usec -= in->tv_usec) < 0) {
--out->tv_sec;
out->tv_usec += 1000000;
}
out->tv_sec -= in->tv_sec;
}
static inline void set_signal(int signo, void (*handler)(int))
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = (void (*)(int))handler;
#ifdef SA_INTERRUPT
sa.sa_flags = SA_INTERRUPT;
#endif
sigaction(signo, &sa, NULL);
}
extern int __schedule_exit(int next);
static inline int schedule_exit(int next)
{
if (npackets && ntransmitted >= npackets && !deadline)
next = __schedule_exit(next);
return next;
}
static inline int in_flight(void)
{
__u16 diff = (__u16)ntransmitted - acked;
return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors;
}
static inline void acknowledge(__u16 seq)
{
__u16 diff = (__u16)ntransmitted - seq;
if (diff <= 0x7FFF) {
if ((int)diff+1 > pipesize)
pipesize = (int)diff+1;
if ((__s16)(seq - acked) > 0 ||
(__u16)ntransmitted - acked > 0x7FFF)
acked = seq;
}
}
static inline void advance_ntransmitted(void)
{
ntransmitted++;
/* Invalidate acked, if 16 bit seq overflows. */
if ((__u16)ntransmitted - acked > 0x7FFF)
acked = (__u16)ntransmitted + 1;
}
extern int send_probe(void);
extern int receive_error_msg(void);
extern int parse_reply(struct msghdr *msg, int len, void *addr, struct timeval *);
extern void install_filter(void);
extern int pinger(void);
extern void sock_setbufs(int icmp_sock, int alloc);
extern void setup(int icmp_sock);
extern void main_loop(int icmp_sock, __u8 *buf, int buflen) __attribute__((noreturn));
extern void finish(void) __attribute__((noreturn));
extern void status(void);
extern void common_options(int ch);
extern int gather_statistics(__u8 *ptr, int cc, __u16 seq, int hops,
int csfailed, struct timeval *tv, char *from);
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