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 */ 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 } 136 137 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); 151 152 static inline int schedule_exit(int next) 153 { 154 if (npackets && ntransmitted >= npackets && !deadline) 155 next = __schedule_exit(next); 156 return next; 157 } 158 159 static inline int in_flight(void) 160 { 161 __u16 diff = (__u16)ntransmitted - acked; 162 return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors; 163 } 164 165 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 } 176 177 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
