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 <sys/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 #include <setjmp.h> 20 21 #ifdef CAPABILITIES 22 #include <sys/prctl.h> 23 #include <sys/capability.h> 24 #endif 25 26 #ifdef USE_IDN 27 #include <locale.h> 28 #include <idna.h> 29 #endif 30 31 #include <netinet/in.h> 32 #include <arpa/inet.h> 33 #include <linux/types.h> 34 #include <linux/errqueue.h> 35 36 #ifdef ANDROID 37 #include <linux/icmp.h> 38 #include <sys/auxv.h> 39 #endif 40 41 #include "SNAPSHOT.h" 42 43 #define DEFDATALEN (64 - 8) /* default data length */ 44 45 #define MAXWAIT 10 /* max seconds to wait for response */ 46 #define MININTERVAL 10 /* Minimal interpacket gap */ 47 #define MINUSERINTERVAL 200 /* Minimal allowed interval for non-root */ 48 49 #define SCHINT(a) (((a) <= MININTERVAL) ? MININTERVAL : (a)) 50 51 /* various options */ 52 extern int options; 53 #define F_FLOOD 0x001 54 #define F_INTERVAL 0x002 55 #define F_NUMERIC 0x004 56 #define F_PINGFILLED 0x008 57 #define F_QUIET 0x010 58 #define F_RROUTE 0x020 59 #define F_SO_DEBUG 0x040 60 #define F_SO_DONTROUTE 0x080 61 #define F_VERBOSE 0x100 62 #define F_TIMESTAMP 0x200 63 #define F_FLOWINFO 0x200 64 #define F_SOURCEROUTE 0x400 65 #define F_TCLASS 0x400 66 #define F_FLOOD_POLL 0x800 67 #define F_LATENCY 0x1000 68 #define F_AUDIBLE 0x2000 69 #define F_ADAPTIVE 0x4000 70 #define F_STRICTSOURCE 0x8000 71 #define F_NOLOOP 0x10000 72 #define F_TTL 0x20000 73 #define F_MARK 0x40000 74 #define F_PTIMEOFDAY 0x80000 75 #define F_OUTSTANDING 0x100000 76 77 /* 78 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 79 * number of received sequence numbers we can keep track of. 80 */ 81 #define MAX_DUP_CHK 0x10000 82 83 #if defined(__WORDSIZE) && __WORDSIZE == 64 84 # define USE_BITMAP64 85 #endif 86 87 #ifdef USE_BITMAP64 88 typedef __u64 bitmap_t; 89 # define BITMAP_SHIFT 6 90 #else 91 typedef __u32 bitmap_t; 92 # define BITMAP_SHIFT 5 93 #endif 94 95 #if ((MAX_DUP_CHK >> (BITMAP_SHIFT + 3)) << (BITMAP_SHIFT + 3)) != MAX_DUP_CHK 96 # error Please MAX_DUP_CHK and/or BITMAP_SHIFT 97 #endif 98 99 struct rcvd_table { 100 bitmap_t bitmap[MAX_DUP_CHK / (sizeof(bitmap_t) * 8)]; 101 }; 102 103 extern struct rcvd_table rcvd_tbl; 104 extern int using_ping_socket; 105 106 #define A(bit) (rcvd_tbl.bitmap[(bit) >> BITMAP_SHIFT]) /* identify word in array */ 107 #define B(bit) (((bitmap_t)1) << ((bit) & ((1 << BITMAP_SHIFT) - 1))) /* identify bit in word */ 108 109 static inline void rcvd_set(__u16 seq) 110 { 111 unsigned bit = seq % MAX_DUP_CHK; 112 A(bit) |= B(bit); 113 } 114 115 static inline void rcvd_clear(__u16 seq) 116 { 117 unsigned bit = seq % MAX_DUP_CHK; 118 A(bit) &= ~B(bit); 119 } 120 121 static inline bitmap_t rcvd_test(__u16 seq) 122 { 123 unsigned bit = seq % MAX_DUP_CHK; 124 return A(bit) & B(bit); 125 } 126 127 extern u_char outpack[]; 128 extern int maxpacket; 129 130 extern int datalen; 131 extern char *hostname; 132 extern int uid; 133 extern int ident; /* process id to identify our packets */ 134 135 extern int sndbuf; 136 extern int ttl; 137 138 extern long npackets; /* max packets to transmit */ 139 extern long nreceived; /* # of packets we got back */ 140 extern long nrepeats; /* number of duplicates */ 141 extern long ntransmitted; /* sequence # for outbound packets = #sent */ 142 extern long nchecksum; /* replies with bad checksum */ 143 extern long nerrors; /* icmp errors */ 144 extern int interval; /* interval between packets (msec) */ 145 extern int preload; 146 extern int deadline; /* time to die */ 147 extern int lingertime; 148 extern struct timeval start_time, cur_time; 149 extern volatile int exiting; 150 extern volatile int status_snapshot; 151 extern int confirm; 152 extern int confirm_flag; 153 extern int working_recverr; 154 155 extern volatile int in_pr_addr; /* pr_addr() is executing */ 156 extern jmp_buf pr_addr_jmp; 157 158 #ifndef MSG_CONFIRM 159 #define MSG_CONFIRM 0 160 #endif 161 162 163 /* timing */ 164 extern int timing; /* flag to do timing */ 165 extern long tmin; /* minimum round trip time */ 166 extern long tmax; /* maximum round trip time */ 167 extern long long tsum; /* sum of all times, for doing average */ 168 extern long long tsum2; 169 extern int rtt; 170 extern __u16 acked; 171 extern int pipesize; 172 173 #define COMMON_OPTIONS \ 174 case 'a': case 'U': case 'c': case 'd': \ 175 case 'f': case 'i': case 'w': case 'l': \ 176 case 'S': case 'n': case 'p': case 'q': \ 177 case 'r': case 's': case 'v': case 'L': \ 178 case 't': case 'A': case 'W': case 'B': case 'm': \ 179 case 'D': case 'O': 180 181 #define COMMON_OPTSTR "h?VQ:I:M:aUc:dfi:w:l:S:np:qrs:vLt:AW:Bm:DO" 182 183 /* 184 * Write to stdout 185 */ 186 static inline void write_stdout(const char *str, size_t len) 187 { 188 size_t o = 0; 189 ssize_t cc; 190 do { 191 cc = write(STDOUT_FILENO, str + o, len - o); 192 o += cc; 193 } while (len > o || cc < 0); 194 } 195 196 /* 197 * tvsub -- 198 * Subtract 2 timeval structs: out = out - in. Out is assumed to 199 * be >= in. 200 */ 201 static inline void tvsub(struct timeval *out, struct timeval *in) 202 { 203 if ((out->tv_usec -= in->tv_usec) < 0) { 204 --out->tv_sec; 205 out->tv_usec += 1000000; 206 } 207 out->tv_sec -= in->tv_sec; 208 } 209 210 static inline void set_signal(int signo, void (*handler)(int)) 211 { 212 struct sigaction sa; 213 214 memset(&sa, 0, sizeof(sa)); 215 216 sa.sa_handler = (void (*)(int))handler; 217 #ifdef SA_INTERRUPT 218 sa.sa_flags = SA_INTERRUPT; 219 #endif 220 sigaction(signo, &sa, NULL); 221 } 222 223 extern int __schedule_exit(int next); 224 225 static inline int schedule_exit(int next) 226 { 227 if (npackets && ntransmitted >= npackets && !deadline) 228 next = __schedule_exit(next); 229 return next; 230 } 231 232 static inline int in_flight(void) 233 { 234 __u16 diff = (__u16)ntransmitted - acked; 235 return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors; 236 } 237 238 static inline void acknowledge(__u16 seq) 239 { 240 __u16 diff = (__u16)ntransmitted - seq; 241 if (diff <= 0x7FFF) { 242 if ((int)diff+1 > pipesize) 243 pipesize = (int)diff+1; 244 if ((__s16)(seq - acked) > 0 || 245 (__u16)ntransmitted - acked > 0x7FFF) 246 acked = seq; 247 } 248 } 249 250 static inline void advance_ntransmitted(void) 251 { 252 ntransmitted++; 253 /* Invalidate acked, if 16 bit seq overflows. */ 254 if ((__u16)ntransmitted - acked > 0x7FFF) 255 acked = (__u16)ntransmitted + 1; 256 } 257 258 extern void limit_capabilities(void); 259 static int enable_capability_raw(void); 260 static int disable_capability_raw(void); 261 static int enable_capability_admin(void); 262 static int disable_capability_admin(void); 263 #ifdef CAPABILITIES 264 extern int modify_capability(cap_value_t, cap_flag_value_t); 265 static inline int enable_capability_raw(void) { return modify_capability(CAP_NET_RAW, CAP_SET); }; 266 static inline int disable_capability_raw(void) { return modify_capability(CAP_NET_RAW, CAP_CLEAR); }; 267 static inline int enable_capability_admin(void) { return modify_capability(CAP_NET_ADMIN, CAP_SET); }; 268 static inline int disable_capability_admin(void) { return modify_capability(CAP_NET_ADMIN, CAP_CLEAR); }; 269 #else 270 extern int modify_capability(int); 271 static inline int enable_capability_raw(void) { return modify_capability(1); }; 272 static inline int disable_capability_raw(void) { return modify_capability(0); }; 273 static inline int enable_capability_admin(void) { return modify_capability(1); }; 274 static inline int disable_capability_admin(void) { return modify_capability(0); }; 275 #endif 276 extern void drop_capabilities(void); 277 extern void android_check_security(void); 278 279 extern int send_probe(void); 280 extern int receive_error_msg(void); 281 extern int parse_reply(struct msghdr *msg, int len, void *addr, struct timeval *); 282 extern void install_filter(void); 283 extern int is_ours(uint16_t id); 284 285 extern int pinger(void); 286 extern void sock_setbufs(int icmp_sock, int alloc); 287 extern void setup(int icmp_sock); 288 extern void main_loop(int icmp_sock, __u8 *buf, int buflen) __attribute__((noreturn)); 289 extern void finish(void) __attribute__((noreturn)); 290 extern void status(void); 291 extern void common_options(int ch); 292 extern int gather_statistics(__u8 *ptr, int icmplen, 293 int cc, __u16 seq, int hops, 294 int csfailed, struct timeval *tv, char *from, 295 void (*pr_reply)(__u8 *ptr, int cc)); 296 extern void print_timestamp(void); 297
