1#include <stdio.h>
2#include <stdlib.h>
3#include <unistd.h>
4#include <time.h>
5#include <sys/param.h>
6#include <sys/socket.h>
7#include <linux/sockios.h>
8#include <sys/file.h>
9#include <sys/time.h>
10#include <signal.h>
11#include <sys/ioctl.h>
12#include <net/if.h>
13#include <sys/uio.h>
14#include <sys/poll.h>
15#include <ctype.h>
16#include <errno.h>
17#include <string.h>
18#include <netdb.h>
19
20#include <netinet/in.h>
21#include <arpa/inet.h>
22#include <linux/errqueue.h>
23
24#define	DEFDATALEN	(64 - 8)	/* default data length */
25
26#define	MAXWAIT		10		/* max seconds to wait for response */
27#define MININTERVAL	10		/* Minimal interpacket gap */
28#define MINUSERINTERVAL	200		/* Minimal allowed interval for non-root */
29
30#define SCHINT(a)	(((a) <= MININTERVAL) ? MININTERVAL : (a))
31
32#define	A(bit)		rcvd_tbl[(bit)>>3]	/* identify byte in array */
33#define	B(bit)		(1 << ((bit) & 0x07))	/* identify bit in byte */
34#define	SET(bit)	(A(bit) |= B(bit))
35#define	CLR(bit)	(A(bit) &= (~B(bit)))
36#define	TST(bit)	(A(bit) & B(bit))
37
38/* various options */
39extern int options;
40#define	F_FLOOD		0x001
41#define	F_INTERVAL	0x002
42#define	F_NUMERIC	0x004
43#define	F_PINGFILLED	0x008
44#define	F_QUIET		0x010
45#define	F_RROUTE	0x020
46#define	F_SO_DEBUG	0x040
47#define	F_SO_DONTROUTE	0x080
48#define	F_VERBOSE	0x100
49#define	F_TIMESTAMP	0x200
50#define	F_FLOWINFO	0x200
51#define	F_SOURCEROUTE	0x400
52#define	F_TCLASS	0x400
53#define	F_FLOOD_POLL	0x800
54#define	F_LATENCY	0x1000
55#define	F_AUDIBLE	0x2000
56#define	F_ADAPTIVE	0x4000
57#define	F_STRICTSOURCE	0x8000
58#define F_NOLOOP	0x10000
59#define F_TTL		0x20000
60
61/*
62 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
63 * number of received sequence numbers we can keep track of.
64 */
65#define	MAX_DUP_CHK	0x10000
66extern int mx_dup_ck;
67extern char rcvd_tbl[MAX_DUP_CHK / 8];
68
69
70extern u_char outpack[];
71extern int maxpacket;
72
73extern int datalen;
74extern char *hostname;
75extern int uid;
76extern int ident;			/* process id to identify our packets */
77
78extern int sndbuf;
79extern int ttl;
80
81extern long npackets;			/* max packets to transmit */
82extern long nreceived;			/* # of packets we got back */
83extern long nrepeats;			/* number of duplicates */
84extern long ntransmitted;		/* sequence # for outbound packets = #sent */
85extern long nchecksum;			/* replies with bad checksum */
86extern long nerrors;			/* icmp errors */
87extern int interval;			/* interval between packets (msec) */
88extern int preload;
89extern int deadline;			/* time to die */
90extern int lingertime;
91extern struct timeval start_time, cur_time;
92extern volatile int exiting;
93extern volatile int status_snapshot;
94extern int confirm;
95extern int confirm_flag;
96extern int working_recverr;
97
98#ifndef MSG_CONFIRM
99#define MSG_CONFIRM 0
100#endif
101
102
103/* timing */
104extern int timing;			/* flag to do timing */
105extern long tmin;			/* minimum round trip time */
106extern long tmax;			/* maximum round trip time */
107extern long long tsum;			/* sum of all times, for doing average */
108extern long long tsum2;
109extern int rtt;
110extern __u16 acked;
111extern int pipesize;
112
113#define COMMON_OPTIONS \
114case 'a': case 'U': case 'c': case 'd': \
115case 'f': case 'i': case 'w': case 'l': \
116case 'S': case 'n': case 'p': case 'q': \
117case 'r': case 's': case 'v': case 'L': \
118case 't': case 'A': case 'W': case 'B':
119
120#define COMMON_OPTSTR "h?VQ:I:M:aUc:dfi:w:l:S:np:qrs:vLt:AW:B"
121
122
123/*
124 * tvsub --
125 *	Subtract 2 timeval structs:  out = out - in.  Out is assumed to
126 * be >= in.
127 */
128static inline void tvsub(struct timeval *out, struct timeval *in)
129{
130	if ((out->tv_usec -= in->tv_usec) < 0) {
131		--out->tv_sec;
132		out->tv_usec += 1000000;
133	}
134	out->tv_sec -= in->tv_sec;
135}
136
137static inline void set_signal(int signo, void (*handler)(int))
138{
139	struct sigaction sa;
140
141	memset(&sa, 0, sizeof(sa));
142
143	sa.sa_handler = (void (*)(int))handler;
144#ifdef SA_INTERRUPT
145	sa.sa_flags = SA_INTERRUPT;
146#endif
147	sigaction(signo, &sa, NULL);
148}
149
150extern int __schedule_exit(int next);
151
152static inline int schedule_exit(int next)
153{
154	if (npackets && ntransmitted >= npackets && !deadline)
155		next = __schedule_exit(next);
156	return next;
157}
158
159static inline int in_flight(void)
160{
161	__u16 diff = (__u16)ntransmitted - acked;
162	return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors;
163}
164
165static inline void acknowledge(__u16 seq)
166{
167	__u16 diff = (__u16)ntransmitted - seq;
168	if (diff <= 0x7FFF) {
169		if ((int)diff+1 > pipesize)
170			pipesize = (int)diff+1;
171		if ((__s16)(seq - acked) > 0 ||
172		    (__u16)ntransmitted - acked > 0x7FFF)
173			acked = seq;
174	}
175}
176
177static inline void advance_ntransmitted(void)
178{
179	ntransmitted++;
180	/* Invalidate acked, if 16 bit seq overflows. */
181	if ((__u16)ntransmitted - acked > 0x7FFF)
182		acked = (__u16)ntransmitted + 1;
183}
184
185
186extern int send_probe(void);
187extern int receive_error_msg(void);
188extern int parse_reply(struct msghdr *msg, int len, void *addr, struct timeval *);
189extern void install_filter(void);
190
191extern int pinger(void);
192extern void sock_setbufs(int icmp_sock, int alloc);
193extern void setup(int icmp_sock);
194extern void main_loop(int icmp_sock, __u8 *buf, int buflen) __attribute__((noreturn));
195extern void finish(void) __attribute__((noreturn));
196extern void status(void);
197extern void common_options(int ch);
198extern int gather_statistics(__u8 *ptr, int cc, __u16 seq, int hops,
199			     int csfailed, struct timeval *tv, char *from);
200