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297 lines
7.8 KiB
297 lines
7.8 KiB
#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <time.h> |
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#include <sys/param.h> |
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#include <sys/socket.h> |
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#include <linux/sockios.h> |
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#include <sys/file.h> |
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#include <sys/time.h> |
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#include <sys/signal.h> |
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#include <sys/ioctl.h> |
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#include <net/if.h> |
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#include <sys/uio.h> |
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#include <sys/poll.h> |
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#include <ctype.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <netdb.h> |
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#include <setjmp.h> |
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#ifdef CAPABILITIES |
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#include <sys/prctl.h> |
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#include <sys/capability.h> |
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#endif |
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#ifdef USE_IDN |
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#include <locale.h> |
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#include <idna.h> |
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#endif |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <linux/types.h> |
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#include <linux/errqueue.h> |
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#ifdef ANDROID |
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#include <linux/icmp.h> |
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#include <sys/auxv.h> |
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#endif |
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#include "SNAPSHOT.h" |
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#define DEFDATALEN (64 - 8) /* default data length */ |
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#define MAXWAIT 10 /* max seconds to wait for response */ |
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#define MININTERVAL 10 /* Minimal interpacket gap */ |
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#define MINUSERINTERVAL 200 /* Minimal allowed interval for non-root */ |
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#define SCHINT(a) (((a) <= MININTERVAL) ? MININTERVAL : (a)) |
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/* various options */ |
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extern int options; |
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#define F_FLOOD 0x001 |
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#define F_INTERVAL 0x002 |
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#define F_NUMERIC 0x004 |
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#define F_PINGFILLED 0x008 |
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#define F_QUIET 0x010 |
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#define F_RROUTE 0x020 |
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#define F_SO_DEBUG 0x040 |
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#define F_SO_DONTROUTE 0x080 |
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#define F_VERBOSE 0x100 |
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#define F_TIMESTAMP 0x200 |
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#define F_FLOWINFO 0x200 |
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#define F_SOURCEROUTE 0x400 |
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#define F_TCLASS 0x400 |
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#define F_FLOOD_POLL 0x800 |
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#define F_LATENCY 0x1000 |
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#define F_AUDIBLE 0x2000 |
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#define F_ADAPTIVE 0x4000 |
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#define F_STRICTSOURCE 0x8000 |
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#define F_NOLOOP 0x10000 |
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#define F_TTL 0x20000 |
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#define F_MARK 0x40000 |
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#define F_PTIMEOFDAY 0x80000 |
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#define F_OUTSTANDING 0x100000 |
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/* |
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* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum |
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* number of received sequence numbers we can keep track of. |
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*/ |
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#define MAX_DUP_CHK 0x10000 |
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#if defined(__WORDSIZE) && __WORDSIZE == 64 |
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# define USE_BITMAP64 |
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#endif |
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#ifdef USE_BITMAP64 |
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typedef __u64 bitmap_t; |
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# define BITMAP_SHIFT 6 |
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#else |
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typedef __u32 bitmap_t; |
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# define BITMAP_SHIFT 5 |
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#endif |
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#if ((MAX_DUP_CHK >> (BITMAP_SHIFT + 3)) << (BITMAP_SHIFT + 3)) != MAX_DUP_CHK |
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# error Please MAX_DUP_CHK and/or BITMAP_SHIFT |
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#endif |
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struct rcvd_table { |
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bitmap_t bitmap[MAX_DUP_CHK / (sizeof(bitmap_t) * 8)]; |
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}; |
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extern struct rcvd_table rcvd_tbl; |
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extern int using_ping_socket; |
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#define A(bit) (rcvd_tbl.bitmap[(bit) >> BITMAP_SHIFT]) /* identify word in array */ |
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#define B(bit) (((bitmap_t)1) << ((bit) & ((1 << BITMAP_SHIFT) - 1))) /* identify bit in word */ |
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static inline void rcvd_set(__u16 seq) |
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{ |
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unsigned bit = seq % MAX_DUP_CHK; |
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A(bit) |= B(bit); |
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} |
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static inline void rcvd_clear(__u16 seq) |
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{ |
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unsigned bit = seq % MAX_DUP_CHK; |
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A(bit) &= ~B(bit); |
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} |
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static inline bitmap_t rcvd_test(__u16 seq) |
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{ |
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unsigned bit = seq % MAX_DUP_CHK; |
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return A(bit) & B(bit); |
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} |
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extern u_char outpack[]; |
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extern int maxpacket; |
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extern int datalen; |
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extern char *hostname; |
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extern int uid; |
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extern int ident; /* process id to identify our packets */ |
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extern int sndbuf; |
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extern int ttl; |
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extern long npackets; /* max packets to transmit */ |
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extern long nreceived; /* # of packets we got back */ |
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extern long nrepeats; /* number of duplicates */ |
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extern long ntransmitted; /* sequence # for outbound packets = #sent */ |
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extern long nchecksum; /* replies with bad checksum */ |
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extern long nerrors; /* icmp errors */ |
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extern int interval; /* interval between packets (msec) */ |
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extern int preload; |
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extern int deadline; /* time to die */ |
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extern int lingertime; |
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extern struct timeval start_time, cur_time; |
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extern volatile int exiting; |
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extern volatile int status_snapshot; |
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extern int confirm; |
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extern int confirm_flag; |
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extern int working_recverr; |
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extern volatile int in_pr_addr; /* pr_addr() is executing */ |
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extern jmp_buf pr_addr_jmp; |
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#ifndef MSG_CONFIRM |
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#define MSG_CONFIRM 0 |
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#endif |
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/* timing */ |
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extern int timing; /* flag to do timing */ |
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extern long tmin; /* minimum round trip time */ |
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extern long tmax; /* maximum round trip time */ |
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extern long long tsum; /* sum of all times, for doing average */ |
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extern long long tsum2; |
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extern int rtt; |
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extern __u16 acked; |
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extern int pipesize; |
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#define COMMON_OPTIONS \ |
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case 'a': case 'U': case 'c': case 'd': \ |
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case 'f': case 'i': case 'w': case 'l': \ |
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case 'S': case 'n': case 'p': case 'q': \ |
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case 'r': case 's': case 'v': case 'L': \ |
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case 't': case 'A': case 'W': case 'B': case 'm': \ |
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case 'D': case 'O': |
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#define COMMON_OPTSTR "h?VQ:I:M:aUc:dfi:w:l:S:np:qrs:vLt:AW:Bm:DO" |
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/* |
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* Write to stdout |
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*/ |
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static inline void write_stdout(const char *str, size_t len) |
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{ |
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size_t o = 0; |
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ssize_t cc; |
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do { |
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cc = write(STDOUT_FILENO, str + o, len - o); |
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o += cc; |
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} while (len > o || cc < 0); |
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} |
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/* |
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* tvsub -- |
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* Subtract 2 timeval structs: out = out - in. Out is assumed to |
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* be >= in. |
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*/ |
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static inline void tvsub(struct timeval *out, struct timeval *in) |
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{ |
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if ((out->tv_usec -= in->tv_usec) < 0) { |
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--out->tv_sec; |
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out->tv_usec += 1000000; |
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} |
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out->tv_sec -= in->tv_sec; |
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} |
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static inline void set_signal(int signo, void (*handler)(int)) |
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{ |
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struct sigaction sa; |
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memset(&sa, 0, sizeof(sa)); |
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sa.sa_handler = (void (*)(int))handler; |
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#ifdef SA_INTERRUPT |
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sa.sa_flags = SA_INTERRUPT; |
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#endif |
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sigaction(signo, &sa, NULL); |
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} |
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extern int __schedule_exit(int next); |
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static inline int schedule_exit(int next) |
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{ |
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if (npackets && ntransmitted >= npackets && !deadline) |
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next = __schedule_exit(next); |
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return next; |
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} |
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static inline int in_flight(void) |
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{ |
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__u16 diff = (__u16)ntransmitted - acked; |
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return (diff<=0x7FFF) ? diff : ntransmitted-nreceived-nerrors; |
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} |
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static inline void acknowledge(__u16 seq) |
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{ |
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__u16 diff = (__u16)ntransmitted - seq; |
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if (diff <= 0x7FFF) { |
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if ((int)diff+1 > pipesize) |
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pipesize = (int)diff+1; |
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if ((__s16)(seq - acked) > 0 || |
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(__u16)ntransmitted - acked > 0x7FFF) |
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acked = seq; |
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} |
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} |
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static inline void advance_ntransmitted(void) |
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{ |
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ntransmitted++; |
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/* Invalidate acked, if 16 bit seq overflows. */ |
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if ((__u16)ntransmitted - acked > 0x7FFF) |
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acked = (__u16)ntransmitted + 1; |
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} |
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extern void limit_capabilities(void); |
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static int enable_capability_raw(void); |
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static int disable_capability_raw(void); |
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static int enable_capability_admin(void); |
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static int disable_capability_admin(void); |
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#ifdef CAPABILITIES |
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extern int modify_capability(cap_value_t, cap_flag_value_t); |
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static inline int enable_capability_raw(void) { return modify_capability(CAP_NET_RAW, CAP_SET); }; |
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static inline int disable_capability_raw(void) { return modify_capability(CAP_NET_RAW, CAP_CLEAR); }; |
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static inline int enable_capability_admin(void) { return modify_capability(CAP_NET_ADMIN, CAP_SET); }; |
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static inline int disable_capability_admin(void) { return modify_capability(CAP_NET_ADMIN, CAP_CLEAR); }; |
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#else |
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extern int modify_capability(int); |
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static inline int enable_capability_raw(void) { return modify_capability(1); }; |
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static inline int disable_capability_raw(void) { return modify_capability(0); }; |
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static inline int enable_capability_admin(void) { return modify_capability(1); }; |
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static inline int disable_capability_admin(void) { return modify_capability(0); }; |
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#endif |
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extern void drop_capabilities(void); |
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extern void android_check_security(void); |
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extern int send_probe(void); |
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extern int receive_error_msg(void); |
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extern int parse_reply(struct msghdr *msg, int len, void *addr, struct timeval *); |
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extern void install_filter(void); |
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extern int is_ours(uint16_t id); |
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extern int pinger(void); |
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extern void sock_setbufs(int icmp_sock, int alloc); |
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extern void sock_setmark(int icmp_sock); |
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extern void setup(int icmp_sock); |
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extern void main_loop(int icmp_sock, __u8 *buf, int buflen) __attribute__((noreturn)); |
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extern void finish(void) __attribute__((noreturn)); |
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extern void status(void); |
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extern void common_options(int ch); |
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extern int gather_statistics(__u8 *ptr, int icmplen, |
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int cc, __u16 seq, int hops, |
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int csfailed, struct timeval *tv, char *from, |
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void (*pr_reply)(__u8 *ptr, int cc)); |
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extern void print_timestamp(void);
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