| #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 <sys/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 <setjmp.h> |
| |
| #ifdef CAPABILITIES |
| #include <sys/prctl.h> |
| #include <sys/capability.h> |
| #endif |
| |
| #ifdef USE_IDN |
| #include <locale.h> |
| #include <idna.h> |
| #endif |
| |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <linux/types.h> |
| #include <linux/errqueue.h> |
| |
| #ifdef ANDROID |
| #include <linux/icmp.h> |
| #include <sys/auxv.h> |
| #endif |
| |
| #include "SNAPSHOT.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)) |
| |
| /* 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 |
| #define F_MARK 0x40000 |
| #define F_PTIMEOFDAY 0x80000 |
| #define F_OUTSTANDING 0x100000 |
| |
| /* |
| * 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 |
| |
| #if defined(__WORDSIZE) && __WORDSIZE == 64 |
| # define USE_BITMAP64 |
| #endif |
| |
| #ifdef USE_BITMAP64 |
| typedef __u64 bitmap_t; |
| # define BITMAP_SHIFT 6 |
| #else |
| typedef __u32 bitmap_t; |
| # define BITMAP_SHIFT 5 |
| #endif |
| |
| #if ((MAX_DUP_CHK >> (BITMAP_SHIFT + 3)) << (BITMAP_SHIFT + 3)) != MAX_DUP_CHK |
| # error Please MAX_DUP_CHK and/or BITMAP_SHIFT |
| #endif |
| |
| struct rcvd_table { |
| bitmap_t bitmap[MAX_DUP_CHK / (sizeof(bitmap_t) * 8)]; |
| }; |
| |
| extern struct rcvd_table rcvd_tbl; |
| extern int using_ping_socket; |
| |
| #define A(bit) (rcvd_tbl.bitmap[(bit) >> BITMAP_SHIFT]) /* identify word in array */ |
| #define B(bit) (((bitmap_t)1) << ((bit) & ((1 << BITMAP_SHIFT) - 1))) /* identify bit in word */ |
| |
| static inline void rcvd_set(__u16 seq) |
| { |
| unsigned bit = seq % MAX_DUP_CHK; |
| A(bit) |= B(bit); |
| } |
| |
| static inline void rcvd_clear(__u16 seq) |
| { |
| unsigned bit = seq % MAX_DUP_CHK; |
| A(bit) &= ~B(bit); |
| } |
| |
| static inline bitmap_t rcvd_test(__u16 seq) |
| { |
| unsigned bit = seq % MAX_DUP_CHK; |
| return A(bit) & B(bit); |
| } |
| |
| 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; |
| |
| extern volatile int in_pr_addr; /* pr_addr() is executing */ |
| extern jmp_buf pr_addr_jmp; |
| |
| #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': case 'm': \ |
| case 'D': case 'O': |
| |
| #define COMMON_OPTSTR "h?VQ:I:M:aUc:dfi:w:l:S:np:qrs:vLt:AW:Bm:DO" |
| |
| /* |
| * Write to stdout |
| */ |
| static inline void write_stdout(const char *str, size_t len) |
| { |
| size_t o = 0; |
| ssize_t cc; |
| do { |
| cc = write(STDOUT_FILENO, str + o, len - o); |
| o += cc; |
| } while (len > o || cc < 0); |
| } |
| |
| /* |
| * 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 void limit_capabilities(void); |
| static int enable_capability_raw(void); |
| static int disable_capability_raw(void); |
| static int enable_capability_admin(void); |
| static int disable_capability_admin(void); |
| #ifdef CAPABILITIES |
| extern int modify_capability(cap_value_t, cap_flag_value_t); |
| static inline int enable_capability_raw(void) { return modify_capability(CAP_NET_RAW, CAP_SET); }; |
| static inline int disable_capability_raw(void) { return modify_capability(CAP_NET_RAW, CAP_CLEAR); }; |
| static inline int enable_capability_admin(void) { return modify_capability(CAP_NET_ADMIN, CAP_SET); }; |
| static inline int disable_capability_admin(void) { return modify_capability(CAP_NET_ADMIN, CAP_CLEAR); }; |
| #else |
| extern int modify_capability(int); |
| static inline int enable_capability_raw(void) { return modify_capability(1); }; |
| static inline int disable_capability_raw(void) { return modify_capability(0); }; |
| static inline int enable_capability_admin(void) { return modify_capability(1); }; |
| static inline int disable_capability_admin(void) { return modify_capability(0); }; |
| #endif |
| extern void drop_capabilities(void); |
| extern void android_check_security(void); |
| |
| 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 is_ours(uint16_t id); |
| |
| extern int pinger(void); |
| extern void sock_setbufs(int icmp_sock, int alloc); |
| extern void sock_setmark(int icmp_sock); |
| 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 icmplen, |
| int cc, __u16 seq, int hops, |
| int csfailed, struct timeval *tv, char *from, |
| void (*pr_reply)(__u8 *ptr, int cc)); |
| extern void print_timestamp(void); |