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 */
39 extern 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
66 extern int mx_dup_ck;
67 extern char rcvd_tbl[MAX_DUP_CHK / 8];
68
69
70 extern u_char outpack[];
71 extern int maxpacket;
72
73 extern int datalen;
74 extern char *hostname;
75 extern int uid;
76 extern int ident; /* process id to identify our packets */
77
78 extern int sndbuf;
79 extern int ttl;
80
81 extern long npackets; /* max packets to transmit */
82 extern long nreceived; /* # of packets we got back */
83 extern long nrepeats; /* number of duplicates */
84 extern long ntransmitted; /* sequence # for outbound packets = #sent */
85 extern long nchecksum; /* replies with bad checksum */
86 extern long nerrors; /* icmp errors */
87 extern int interval; /* interval between packets (msec) */
88 extern int preload;
89 extern int deadline; /* time to die */
90 extern int lingertime;
91 extern struct timeval start_time, cur_time;
92 extern volatile int exiting;
93 extern volatile int status_snapshot;
94 extern int confirm;
95 extern int confirm_flag;
96 extern int working_recverr;
97
98 #ifndef MSG_CONFIRM
99 #define MSG_CONFIRM 0
100 #endif
101
102
103 /* timing */
104 extern int timing; /* flag to do timing */
105 extern long tmin; /* minimum round trip time */
106 extern long tmax; /* maximum round trip time */
107 extern long long tsum; /* sum of all times, for doing average */
108 extern long long tsum2;
109 extern int rtt;
110 extern __u16 acked;
111 extern int pipesize;
112
113 #define COMMON_OPTIONS \
114 case 'a': case 'U': case 'c': case 'd': \
115 case 'f': case 'i': case 'w': case 'l': \
116 case 'S': case 'n': case 'p': case 'q': \
117 case 'r': case 's': case 'v': case 'L': \
118 case '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 */
tvsub(struct timeval * out,struct timeval * in)128 static 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
set_signal(int signo,void (* handler)(int))137 static 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
150 extern int __schedule_exit(int next);
151
schedule_exit(int next)152 static inline int schedule_exit(int next)
153 {
154 if (npackets && ntransmitted >= npackets && !deadline)
155 next = __schedule_exit(next);
156 return next;
157 }
158
in_flight(void)159 static inline int in_flight(void)
160 {
161 __u16 diff = (__u16)ntransmitted - acked;
162 return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors;
163 }
164
acknowledge(__u16 seq)165 static 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
advance_ntransmitted(void)177 static 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
186 extern int send_probe(void);
187 extern int receive_error_msg(void);
188 extern int parse_reply(struct msghdr *msg, int len, void *addr, struct timeval *);
189 extern void install_filter(void);
190
191 extern int pinger(void);
192 extern void sock_setbufs(int icmp_sock, int alloc);
193 extern void setup(int icmp_sock);
194 extern void main_loop(int icmp_sock, __u8 *buf, int buflen) __attribute__((noreturn));
195 extern void finish(void) __attribute__((noreturn));
196 extern void status(void);
197 extern void common_options(int ch);
198 extern int gather_statistics(__u8 *ptr, int cc, __u16 seq, int hops,
199 int csfailed, struct timeval *tv, char *from);
200