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/*
* cheap and dirty network database lookup functions
*/
/*
* uses local files only
*/
/*
* currently searches the protocols only
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#if (defined(WIN32) || defined(cygwin) || defined(aix4))
#ifdef aix4
#define _NO_PROTO /* Hack, you say ? */
#endif
#include <stdio.h>
#include <sys/types.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_NETDB_H
#include <netdb.h>
#endif
static int h_stay_open, s_stay_open, p_stay_open, n_stay_open;
static FILE *h_fp, *s_fp, *p_fp, *n_fp;
static char *p_fn;
#ifdef notused
static char *h_fn, *s_fn, *n_fn;
#endif
#ifdef aix4
#define ROOT_BASE "/etc/"
#define PROT_FN "protocols"
#else
#define ROOT_BASE "\\SYSTEM32\\DRIVERS\\ETC\\"
#define PROT_FN "protocol"
#endif
#define HOST_FN "hosts"
#define SERV_FN "services"
#define NETW_FN "networks"
static int pre_env_done = 0;
static void
pre_env(void)
{
const char *cproot;
const char *cp = "";
if (pre_env_done)
return;
pre_env_done = 1;
#ifndef aix4
cp = getenv("SYSTEMROOT");
if (cp) {
;
/*
* printf ("Root is '%s'\n", cp);
*/
} else
cp = "C:\\WINNT";
#endif
cproot = ROOT_BASE;
p_fn =
(char *) malloc(3 + strlen(cp) + strlen(cproot) + strlen(PROT_FN));
if (p_fn)
sprintf(p_fn, "%s%s%s", cp, cproot, PROT_FN);
#ifdef notused
h_fn =
(char *) malloc(3 + strlen(cp) + strlen(cproot) + strlen(HOST_FN));
if (h_fn)
sprintf(h_fn, "%s%s%s", cp, cproot, HOST_FN);
s_fn =
(char *) malloc(3 + strlen(cp) + strlen(cproot) + strlen(SERV_FN));
if (s_fn)
sprintf(s_fn, "%s%s%s", cp, cproot, SERV_FN);
n_fn =
(char *) malloc(3 + strlen(cp) + strlen(cproot) + strlen(NETW_FN));
if (n_fn)
sprintf(n_fn, "%s%s%s", cp, cproot, NETW_FN);
#endif
}
/*
* sets can open. ends must close.
*/
void
endhostent(void)
{
if (h_fp)
fclose(h_fp);
h_fp = 0;
}
void
endservent(void)
{
if (s_fp)
fclose(s_fp);
s_fp = 0;
}
void
endprotoent(void)
{
if (p_fp)
fclose(p_fp);
p_fp = 0;
}
void
endnetent(void)
{
if (n_fp)
fclose(n_fp);
n_fp = 0;
}
void
sethostent(int stay_open)
{
pre_env();
endhostent();
h_stay_open = stay_open;
}
void
setservent(int stay_open)
{
pre_env();
endservent();
s_stay_open = stay_open;
}
void
setprotoent(int stay_open)
{
pre_env();
endprotoent();
p_stay_open = stay_open;
}
void
setnetent(int stay_open)
{
pre_env();
endnetent();
n_stay_open = stay_open;
}
#define STRTOK_DELIMS " \t\n"
/*
* get next entry from data base file, or from NIS if possible.
*/
/*
* returns 0 if there are no more entries to read.
*/
struct hostent *
gethostent(void)
{
return 0;
}
struct servent *
getservent(void)
{
return 0;
}
struct protoent *
getprotoent(void)
{
char *cp, **alp, lbuf[256];
static struct protoent spx;
static char *ali[10];
struct protoent *px = &spx;
int linecnt = 0;
char *st;
for (alp = ali; *alp; free(*alp), *alp = 0, alp++);
if (px->p_name)
free(px->p_name);
px->p_aliases = ali;
if (!p_fn)
return 0;
if (!p_fp)
p_fp = fopen(p_fn, "r");
if (!p_fp)
return 0;
while (fgets(lbuf, sizeof(lbuf), p_fp)) {
linecnt++;
cp = lbuf;
if (*cp == '#')
continue;
cp = strtok_r(lbuf, STRTOK_DELIMS, &st);
if (!cp)
continue;
if (cp)
px->p_name = strdup(cp);
cp = strtok_r(NULL, STRTOK_DELIMS, &st);
if (!cp) {
free(px->p_name);
continue;
}
px->p_proto = (short) atoi(cp);
for (alp = px->p_aliases; cp; alp++) {
cp = strtok_r(NULL, STRTOK_DELIMS, &st);
if (!cp)
break;
if (*cp == '#')
break;
*alp = strdup(cp);
}
return (px);
}
return 0;
}
struct netent *
getnetent(void)
{
return 0;
}
struct netent *
getnetbyaddr(long net, int type)
{
return 0;
}
/*
* Return the network number from an internet address
*/
u_long
inet_netof(struct in_addr in)
{
register u_long i = ntohl(in.s_addr);
u_long ii = (i >> 24) & 0xff;
if (0 == (ii & 0x80))
return ((0xff000000 & i) >> 24);
if (0x80 == (ii & 0xc0))
return ((0xffff0000 & i) >> 16);
/*
* if (0xc0 == (ii & 0xe0))
*/
return ((0xffffff00 & i) >> 8);
}
/*
* Return the host number from an internet address
*/
u_long
inet_lnaof(struct in_addr in)
{
register u_long i = ntohl(in.s_addr);
u_long ii = (i >> 24) & 0xff;
if (0 == (ii & 0x80))
return (0x00ffffff & i);
if (0x80 == (ii & 0xc0))
return (0x0000ffff & i);
/*
* if (0xc0 == (ii & 0xe0))
*/
return (0x000000ff & i);
}
#endif /* WIN32 or cygwin */
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