KlugyTools/CheckResolv/fonctions.c

168 lines
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2022-11-24 14:37:21 +01:00
/*
* CheckResolv
* ===========
* quick and dirty debugging hack.
*
* a bunch of various undocumented functions.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include "fonctions.h"
/* ------------------------------------------------------------ */
/*
* return !0 if str seems to be a quadnumber ip address.
*/
int is_IP_addr(char *str)
{
int nbrdots, length, foo, flag;
/* int o[4]; */
length = strlen(str);
flag = nbrdots = 0;
for (foo=0; foo<length; foo++)
{
if (str[foo]=='.') nbrdots++;
else if ( ! isdigit(str[foo]) )
return 0;
}
return nbrdots==3;
}
/*
* warning, this func is a kludge.
*/
/* ------------------------------------------------------------ */
double chronometre(void)
{
struct timeval tv;
int foo;
double ftemps;
foo = gettimeofday(&tv, NULL);
if (foo) perror("get time of day");
ftemps = (double)tv.tv_sec + ((double)tv.tv_usec/1e6);
return ftemps;
}
/* ------------------------------------------------------------ */
int print_ip(struct in_addr **liste)
{
struct in_addr *addr;
if (liste==NULL)
{
fprintf(stderr, "print addrip (%s:%d): liste is NULL\n",
__FILE__, __LINE__);
exit(5);
}
while ((addr = *liste++)!=NULL)
{
printf("ip: %s", inet_ntoa(*addr));
/*
* mmmm, must resolve globals vars...
if (verbose)
printf(" %8x", *addr);
*/
printf("\n");
}
return 0;
}
/* ------------------------------------------------------------ */
static void print_onevar(char *name)
{
char *ptr;
if ((ptr=getenv(name)) == NULL)
printf("%-29s is not defined\n", name);
else
printf("%-27s = '%s'\n", name, ptr);
}
struct envvars
{
char *name;
char *comment;
} envvars[] =
{
{ "HOSTNAME", NULL },
{ "HOSTALIASES", NULL },
{ "http_proxy", NULL },
{ "ftp_proxy", NULL },
{ "PRINTER", NULL },
{ "RESOLV_HOST_CONF", NULL },
{ "RESOLV_SERV_ORDER", NULL },
{ "RESOLV_SPOOF_CHECK", NULL },
{ "RESOLV_MULTI", NULL },
{ "RESOLV_REORDER", NULL },
{ "CHECKRESOLV", NULL },
{ "TONTON_TH", NULL },
{ NULL, NULL }
};
/*
* by the way, if you know another interesting env vars in
* the resolver context...
*/
int print_envvars(int flags)
{
struct envvars *pev;
puts("");
pev = envvars;
while (pev->name != NULL)
{
print_onevar(pev->name);
pev++;
}
return 0;
}
/* ------------------------------------------------------------ */
void help_options(void)
{
fputs("checkresolv [-v] [-r] [-e] [-t] hostname|ipaddr\n", stderr);
fputs("checkresolv -h : more help\n", stderr);
fputs("checkresolv -V : print version\n", stderr);
}
/* ------------------------------------------------------------ */
void usage(void)
{
fprintf(stderr, "*** CheckResolv v %s *** by tth ***\n", VERSION);
fputs("Usage:\n", stderr);
fputs("\tcheckresolv [options] hostname | @ip\n", stderr);
fputs("\n", stderr);
fputs("options:\n", stderr);
fputs("\t-V: display version number\n", stderr);
fputs("\t-v: increase verbosity\n", stderr);
fputs("\t-r: try a reverse lookup\n", stderr);
fputs("\t-e: print some env vars\n", stderr);
fputs("\t-t: print elapsed time\n", stderr);
fputs("\n", stderr);
fputs("environmemt variable:\n", stderr);
fputs("\tname: CHECKRESOLV\n", stderr);
fputs("\tvalue: \"tech\" reverse-lookup and timing\n", stderr);
fputs("\tvalue: \"all\" all the bells & whistles\n", stderr);
fputs("\n", stderr);
exit(0);
}
/* ------------------------------------------------------------ */
void version(void)
{
printf("CheckResolv v %s by tth\n", VERSION);
}
/* ------------------------------------------------------------ */