ping6.h

linux下常用的网络工具的代码

/* Copyright (C) 1998, 2004 Free Software Foundation, Inc.

   This file is part of GNU Inetutils.

   GNU Inetutils is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   GNU Inetutils is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GNU Inetutils; see the file COPYING.  If not, write
   to the Free Software Foundation, Inc., 51 Franklin Street,
   Fifth Floor, Boston, MA 02110-1301 USA. */

#include <netinet/in.h>
#include <netinet/icmp6.h>

typedef struct ping_data PING;
typedef int (*ping_efp) (int code, void *closure, struct sockaddr_in6 *dest,
			 struct sockaddr_in6 *from, struct icmp6_hdr *icmp,
			 int datalen);


struct ping_data
{
  int    ping_fd;        /* Raw socket descriptor */
  int    ping_type;      /* Type of packets to send */
  int    ping_count;     /* Number of packets to send */
  int    ping_interval;  /* Number of seconds to wait between sending pkts */
  struct sockaddr_in6 ping_dest; /* whom to ping */
  char   *ping_hostname;     /* Printable hostname */
  size_t ping_datalen;   /* Length of data */
  int    ping_ident;     /* Our identifier */
                          
  ping_efp ping_event;   /* User-defined handler */
  void *ping_closure;    /* User-defined data */

  /* Runtime info */
  int ping_cktab_size;
  char   *ping_cktab;
  
  u_char *ping_buffer;   /* I/O buffer */
  struct sockaddr_in6 ping_from;
  long   ping_num_xmit;  /* Number of packets transmitted */
  long   ping_num_recv;  /* Number of packets received */
  long   ping_num_rept;  /* Number of duplicates received */
};

struct ping_stat
{
  double tmin;	    /* minimum round trip time */
  double tmax;      /* maximum round trip time */
  double tsum;	    /* sum of all times, for doing average */
  double tsumsq;    /* sum of all times squared, for std. dev. */
};

#define PEV_RESPONSE 0
#define PEV_DUPLICATE 1
#define PEV_NOECHO  2

#define PING_INTERVAL 1
#define	PING_CKTABSIZE 128

#define	MAXWAIT		10		/* max seconds to wait for response */

#define	OPT_FLOOD	0x001
#define	OPT_INTERVAL	0x002
#define	OPT_NUMERIC	0x004
#define	OPT_QUIET	0x008
#define	OPT_RROUTE	0x010
#define	OPT_VERBOSE	0x020

#define PING_TIMING(s) (s >= PING_HEADER_LEN)
#define	PING_HEADER_LEN	sizeof (struct timeval)
#define	PING_DATALEN	(64 - PING_HEADER_LEN)	/* default data length */
#define PING_MAX_DATALEN (65535 - sizeof (struct icmp6_hdr))

#define _PING_BUFLEN(p) ((p)->ping_datalen + sizeof (struct icmp6_hdr))

#define _C_BIT(p,bit)    (p)->ping_cktab[(bit)>>3]  /* byte in ck array */
#define _C_MASK(bit)     (1 << ((bit) & 0x07))

#define _PING_SET(p,bit) (_C_BIT (p,bit) |= _C_MASK (bit))
#define _PING_CLR(p,bit) (_C_BIT (p,bit) &= (~_C_MASK (bit)))
#define _PING_TST(p,bit) (_C_BIT (p,bit) & _C_MASK (bit))

static PING *ping_init (int type, int ident);
static int ping_set_dest (PING *ping, char *host);
static int ping_set_data (PING *p, void *data, size_t off, size_t len);
static int ping_recv (PING *p);
static int ping_xmit (PING *p);

static int ping_run (PING *ping, int (*finish)());
static int ping_finish (void);