glibc/nss/test-netdb.c

341 lines
8.1 KiB
C

/* Copyright (C) 1998-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/*
Testing of some network related lookup functions.
The system databases looked up are:
- /etc/services
- /etc/hosts
- /etc/networks
- /etc/protocols
The tests try to be fairly generic and simple so that they work on
every possible setup (and might therefore not detect some possible
errors).
*/
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <unistd.h>
#include <errno.h>
#include "nss.h"
#include <support/support.h>
/*
The following define is necessary for glibc 2.0.6
*/
#ifndef INET6_ADDRSTRLEN
# define INET6_ADDRSTRLEN 46
#endif
int error_count;
static void
output_servent (const char *call, struct servent *sptr)
{
char **pptr;
if (sptr == NULL)
printf ("Call: %s returned NULL\n", call);
else
{
printf ("Call: %s, returned: s_name: %s, s_port: %d, s_proto: %s\n",
call, sptr->s_name, ntohs(sptr->s_port), sptr->s_proto);
for (pptr = sptr->s_aliases; *pptr != NULL; pptr++)
printf (" alias: %s\n", *pptr);
}
}
static void
test_services (void)
{
struct servent *sptr;
sptr = getservbyname ("domain", "tcp");
output_servent ("getservbyname (\"domain\", \"tcp\")", sptr);
sptr = getservbyname ("domain", "udp");
output_servent ("getservbyname (\"domain\", \"udp\")", sptr);
sptr = getservbyname ("domain", NULL);
output_servent ("getservbyname (\"domain\", NULL)", sptr);
sptr = getservbyname ("not-existant", NULL);
output_servent ("getservbyname (\"not-existant\", NULL)", sptr);
/* This shouldn't return anything. */
sptr = getservbyname ("", "");
output_servent ("getservbyname (\"\", \"\")", sptr);
sptr = getservbyname ("", "tcp");
output_servent ("getservbyname (\"\", \"tcp\")", sptr);
sptr = getservbyport (htons(53), "tcp");
output_servent ("getservbyport (htons(53), \"tcp\")", sptr);
sptr = getservbyport (htons(53), NULL);
output_servent ("getservbyport (htons(53), NULL)", sptr);
sptr = getservbyport (htons(1), "udp"); /* shouldn't exist */
output_servent ("getservbyport (htons(1), \"udp\")", sptr);
setservent (0);
do
{
sptr = getservent ();
output_servent ("getservent ()", sptr);
}
while (sptr != NULL);
endservent ();
}
static void
output_hostent (const char *call, struct hostent *hptr)
{
char **pptr;
char buf[INET6_ADDRSTRLEN];
if (hptr == NULL)
printf ("Call: %s returned NULL\n", call);
else
{
printf ("Call: %s returned: name: %s, addr_type: %d\n",
call, hptr->h_name, hptr->h_addrtype);
if (hptr->h_aliases)
for (pptr = hptr->h_aliases; *pptr != NULL; pptr++)
printf (" alias: %s\n", *pptr);
for (pptr = hptr->h_addr_list; *pptr != NULL; pptr++)
printf (" ip: %s\n",
inet_ntop (hptr->h_addrtype, *pptr, buf, sizeof (buf)));
}
}
static void
test_hosts (void)
{
struct hostent *hptr1, *hptr2;
char *name = NULL;
size_t namelen = 0;
struct in_addr ip;
hptr1 = gethostbyname ("localhost");
hptr2 = gethostbyname ("LocalHost");
if (hptr1 != NULL || hptr2 != NULL)
{
if (hptr1 == NULL)
{
printf ("localhost not found - but LocalHost found:-(\n");
++error_count;
}
else if (hptr2 == NULL)
{
printf ("LocalHost not found - but localhost found:-(\n");
++error_count;
}
else if (strcmp (hptr1->h_name, hptr2->h_name) != 0)
{
printf ("localhost and LocalHost have different canoncial name\n");
printf ("gethostbyname (\"localhost\")->%s\n", hptr1->h_name);
printf ("gethostbyname (\"LocalHost\")->%s\n", hptr2->h_name);
++error_count;
}
else
output_hostent ("gethostbyname(\"localhost\")", hptr1);
}
hptr1 = gethostbyname ("127.0.0.1");
output_hostent ("gethostbyname (\"127.0.0.1\")", hptr1);
hptr1 = gethostbyname ("10.1234");
output_hostent ("gethostbyname (\"10.1234\")", hptr1);
hptr1 = gethostbyname2 ("localhost", AF_INET);
output_hostent ("gethostbyname2 (\"localhost\", AF_INET)", hptr1);
while (gethostname (name, namelen) < 0 && errno == ENAMETOOLONG)
{
namelen += 2; /* tiny increments to test a lot */
name = xrealloc (name, namelen);
}
if (gethostname (name, namelen) == 0)
{
printf ("Hostname: %s\n", name);
if (name != NULL)
{
hptr1 = gethostbyname (name);
output_hostent ("gethostbyname (gethostname(...))", hptr1);
}
}
ip.s_addr = htonl (INADDR_LOOPBACK);
hptr1 = gethostbyaddr ((char *) &ip, sizeof (ip), AF_INET);
if (hptr1 != NULL)
{
printf ("official name of 127.0.0.1: %s\n", hptr1->h_name);
}
sethostent (0);
do
{
hptr1 = gethostent ();
output_hostent ("gethostent ()", hptr1);
}
while (hptr1 != NULL);
endhostent ();
}
static void
output_netent (const char *call, struct netent *nptr)
{
char **pptr;
if (nptr == NULL)
printf ("Call: %s returned NULL\n", call);
else
{
struct in_addr ip;
ip.s_addr = htonl(nptr->n_net);
printf ("Call: %s, returned: n_name: %s, network_number: %s\n",
call, nptr->n_name, inet_ntoa (ip));
for (pptr = nptr->n_aliases; *pptr != NULL; pptr++)
printf (" alias: %s\n", *pptr);
}
}
static void
test_network (void)
{
struct netent *nptr;
uint32_t ip;
/*
This test needs the following line in /etc/networks:
loopback 127.0.0.0
*/
nptr = getnetbyname ("loopback");
output_netent ("getnetbyname (\"loopback\")",nptr);
nptr = getnetbyname ("LoopBACK");
output_netent ("getnetbyname (\"LoopBACK\")",nptr);
ip = inet_network ("127.0.0.0");
nptr = getnetbyaddr (ip, AF_INET);
output_netent ("getnetbyaddr (inet_network (\"127.0.0.0\"), AF_INET)",nptr);
setnetent (0);
do
{
nptr = getnetent ();
output_netent ("getnetent ()", nptr);
}
while (nptr != NULL);
endnetent ();
}
static void
output_protoent (const char *call, struct protoent *prptr)
{
char **pptr;
if (prptr == NULL)
printf ("Call: %s returned NULL\n", call);
else
{
printf ("Call: %s, returned: p_name: %s, p_proto: %d\n",
call, prptr->p_name, prptr->p_proto);
for (pptr = prptr->p_aliases; *pptr != NULL; pptr++)
printf (" alias: %s\n", *pptr);
}
}
static void
test_protocols (void)
{
struct protoent *prptr;
prptr = getprotobyname ("IP");
output_protoent ("getprotobyname (\"IP\")", prptr);
prptr = getprotobynumber (1);
output_protoent ("getprotobynumber (1)", prptr);
setprotoent (0);
do
{
prptr = getprotoent ();
output_protoent ("getprotoent ()", prptr);
}
while (prptr != NULL);
endprotoent ();
}
/* Override /etc/nsswitch.conf for this program. This is mainly
useful for developers. */
static void __attribute__ ((unused))
setdb (const char *dbname)
{
if (strcmp ("db", dbname))
{
/*
db is not implemented for hosts, networks
*/
__nss_configure_lookup ("hosts", dbname);
__nss_configure_lookup ("networks", dbname);
}
__nss_configure_lookup ("protocols", dbname);
__nss_configure_lookup ("services", dbname);
}
static int
do_test (void)
{
/*
setdb ("db");
*/
test_hosts ();
test_network ();
test_protocols ();
test_services ();
if (error_count)
printf ("\n %d errors occurred!\n", error_count);
else
printf ("No visible errors occurred!\n");
return (error_count != 0);
}
#include <support/test-driver.c>