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nut/tools/nut-scanner/scan_xml_http.c
lagertonne b2b0c9995a new upstream 2.8.0
2022-06-29 12:37:36 +02:00

716 lines
22 KiB
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/*
* Copyright (C) 2011 - EATON
* Copyright (C) 2016 - EATON - IP addressed XML scan
* Copyright (C) 2016-2021 - EATON - Various threads-related improvements
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*! \file scan_xml_http.c
\brief detect NUT supported XML HTTP devices
\author Frederic Bohe <fredericbohe@eaton.com>
\author Michal Vyskocil <MichalVyskocil@eaton.com>
\author Jim Klimov <EvgenyKlimov@eaton.com>
*/
#include "common.h"
#include "nut-scan.h"
#ifdef WITH_NEON
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <string.h>
#include <stdio.h>
#include <sys/select.h>
#include <errno.h>
#include <ne_xml.h>
#include <ltdl.h>
/* dynamic link library stuff */
static char * libname = "libneon"; /* Note: this is for info messages, not the SONAME */
static lt_dlhandle dl_handle = NULL;
static const char *dl_error = NULL;
static void (*nut_ne_xml_push_handler)(ne_xml_parser *p,
ne_xml_startelm_cb *startelm,
ne_xml_cdata_cb *cdata,
ne_xml_endelm_cb *endelm,
void *userdata);
static void (*nut_ne_xml_destroy)(ne_xml_parser *p);
static int (*nut_ne_xml_failed)(ne_xml_parser *p);
static ne_xml_parser * (*nut_ne_xml_create)(void);
static int (*nut_ne_xml_parse)(ne_xml_parser *p, const char *block, size_t len);
static nutscan_device_t * dev_ret = NULL;
#ifdef HAVE_PTHREAD
static pthread_mutex_t dev_mutex;
#endif
/* use explicit booleans */
#ifndef FALSE
typedef enum ebool { FALSE = 0, TRUE } bool_t;
#else
typedef int bool_t;
#endif
/* return 0 on error; visible externally */
int nutscan_load_neon_library(const char *libname_path);
int nutscan_load_neon_library(const char *libname_path)
{
if (dl_handle != NULL) {
/* if previous init failed */
if (dl_handle == (void *)1) {
return 0;
}
/* init has already been done */
return 1;
}
if (libname_path == NULL) {
fprintf(stderr, "Neon library not found. XML search disabled.\n");
return 0;
}
if (lt_dlinit() != 0) {
fprintf(stderr, "Error initializing lt_init\n");
return 0;
}
dl_handle = lt_dlopen(libname_path);
if (!dl_handle) {
dl_error = lt_dlerror();
goto err;
}
lt_dlerror(); /* Clear any existing error */
*(void **) (&nut_ne_xml_push_handler) = lt_dlsym(dl_handle,
"ne_xml_push_handler");
if ((dl_error = lt_dlerror()) != NULL) {
goto err;
}
*(void **) (&nut_ne_xml_destroy) = lt_dlsym(dl_handle, "ne_xml_destroy");
if ((dl_error = lt_dlerror()) != NULL) {
goto err;
}
*(void **) (&nut_ne_xml_create) = lt_dlsym(dl_handle, "ne_xml_create");
if ((dl_error = lt_dlerror()) != NULL) {
goto err;
}
*(void **) (&nut_ne_xml_parse) = lt_dlsym(dl_handle, "ne_xml_parse");
if ((dl_error = lt_dlerror()) != NULL) {
goto err;
}
*(void **) (&nut_ne_xml_failed) = lt_dlsym(dl_handle, "ne_xml_failed");
if ((dl_error = lt_dlerror()) != NULL) {
goto err;
}
return 1;
err:
fprintf(stderr, "Cannot load XML library (%s) : %s. XML search disabled.\n", libname, dl_error);
dl_handle = (void *)1;
lt_dlexit();
return 0;
}
/* A start-element callback for element with given namespace/name. */
static int startelm_cb(void *userdata, int parent, const char *nspace, const char *name, const char **atts) {
nutscan_device_t * dev = (nutscan_device_t *)userdata;
char buf[SMALLBUF];
int i = 0;
int result = -1;
while (atts[i] != NULL) {
upsdebugx(5, "startelm_cb() : parent=%d nspace='%s' name='%s' atts[%d]='%s' atts[%d]='%s'",
parent, nspace, name, i, atts[i], (i + 1), atts[i + 1]);
/* The Eaton/MGE ePDUs almost exclusively support only XMLv4 protocol
* (only the very first generation of G2/G3 NMCs supported an older
* protocol, but all should have been FW upgraded by now), which NUT
* drivers don't yet support. To avoid failing drivers later, the
* nut-scanner should not suggest netxml-ups configuration for ePDUs
* at this time. */
if (strcmp(atts[i], "class") == 0 && strcmp(atts[i + 1], "DEV.PDU") == 0) {
upsdebugx(3, "startelm_cb() : XML v4 protocol is not supported by current NUT drivers, skipping device!");
/* netxml-ups currently only supports XML version 3 (for UPS),
* and not version 4 (for UPS and PDU)! */
return -1;
}
if (strcmp(atts[i], "type") == 0) {
snprintf(buf, sizeof(buf), "%s", atts[i + 1]);
nutscan_add_option_to_device(dev, "desc", buf);
result = 0;
}
i = i + 2;
}
return result;
}
static void * nutscan_scan_xml_http_generic(void * arg)
{
nutscan_xml_t * sec = (nutscan_xml_t *)arg;
char *scanMsg = "<SCAN_REQUEST/>";
/* Note: at this time the HTTP/XML scan is in fact not implemented - just the UDP part */
/* uint16_t port_http = 80; */
uint16_t port_udp = 4679;
/* A NULL "ip" causes a broadcast scan; otherwise the single ip address is queried directly */
char *ip = NULL;
useconds_t usec_timeout = 0;
int peerSocket;
int sockopt_on = 1;
struct sockaddr_in sockAddress_udp;
socklen_t sockAddressLength = sizeof(sockAddress_udp);
memset(&sockAddress_udp, 0, sizeof(sockAddress_udp));
fd_set fds;
struct timeval timeout;
int ret;
char buf[SMALLBUF + 8];
char string[SMALLBUF];
ssize_t recv_size;
int i;
nutscan_device_t * nut_dev = NULL;
if (sec != NULL) {
/* if (sec->port_http > 0 && sec->port_http <= 65534)
* port_http = sec->port_http; */
if (sec->port_udp > 0 && sec->port_udp <= 65534)
port_udp = sec->port_udp;
if (sec->usec_timeout > 0)
usec_timeout = sec->usec_timeout;
ip = sec->peername; /* NULL or not... */
}
if (usec_timeout <= 0)
usec_timeout = 5000000; /* Driver default : 5sec */
if (!nutscan_avail_xml_http) {
return NULL;
}
if ((peerSocket = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
fprintf(stderr, "Error creating socket\n");
return NULL;
}
/* FIXME : Per http://stackoverflow.com/questions/683624/udp-broadcast-on-all-interfaces
* A single sendto() generates a single packet, so one must iterate all known interfaces... */
#define MAX_RETRIES 3
for (i = 0; i != MAX_RETRIES ; i++) {
/* Initialize socket */
sockAddress_udp.sin_family = AF_INET;
if (ip == NULL) {
upsdebugx(2,
"nutscan_scan_xml_http_generic() : scanning connected network segment(s) "
"with a broadcast, attempt %d of %d with a timeout of %jd usec",
(i + 1), MAX_RETRIES, (uintmax_t)usec_timeout);
sockAddress_udp.sin_addr.s_addr = INADDR_BROADCAST;
setsockopt(peerSocket, SOL_SOCKET, SO_BROADCAST, &sockopt_on,
sizeof(sockopt_on));
} else {
upsdebugx(2,
"nutscan_scan_xml_http_generic() : scanning IP '%s' with a unicast, "
"attempt %d of %d with a timeout of %jd usec",
ip, (i + 1), MAX_RETRIES, (uintmax_t)usec_timeout);
inet_pton(AF_INET, ip, &(sockAddress_udp.sin_addr));
}
sockAddress_udp.sin_port = htons(port_udp);
/* Send scan request */
if (sendto(peerSocket, scanMsg, strlen(scanMsg), 0,
(struct sockaddr *)&sockAddress_udp,
sockAddressLength) <= 0
) {
fprintf(stderr,
"Error sending Eaton <SCAN_REQUEST/> to %s, #%d/%d\n",
(ip ? ip : "<broadcast>"), (i + 1), MAX_RETRIES);
usleep(usec_timeout);
continue;
}
else
{
int retNum = 0;
FD_ZERO(&fds);
FD_SET(peerSocket, &fds);
timeout.tv_sec = usec_timeout / 1000000;
timeout.tv_usec = usec_timeout % 1000000;
upsdebugx(5, "nutscan_scan_xml_http_generic() : sent request to %s, "
"loop #%d/%d, waiting for responses",
(ip ? ip : "<broadcast>"), (i + 1), MAX_RETRIES);
while ((ret = select(peerSocket + 1, &fds, NULL, NULL,
&timeout))
) {
retNum ++;
upsdebugx(5, "nutscan_scan_xml_http_generic() : request to %s, "
"loop #%d/%d, response #%d",
(ip ? ip : "<broadcast>"), (i + 1), MAX_RETRIES, retNum);
timeout.tv_sec = usec_timeout / 1000000;
timeout.tv_usec = usec_timeout % 1000000;
if (ret == -1) {
fprintf(stderr,
"Error waiting on \
socket: %d\n", errno);
break;
}
sockAddressLength = sizeof(struct sockaddr_in);
recv_size = recvfrom(peerSocket, buf,
sizeof(buf), 0,
(struct sockaddr *)&sockAddress_udp,
&sockAddressLength);
if (recv_size < 0) {
fprintf(stderr,
"Error reading \
socket: %d, #%d/%d\n", errno, (i + 1), MAX_RETRIES);
usleep(usec_timeout);
continue;
}
if (getnameinfo(
(struct sockaddr *)&sockAddress_udp,
sizeof(struct sockaddr_in), string,
sizeof(string), NULL, 0,
NI_NUMERICHOST) != 0
) {
fprintf(stderr,
"Error converting IP address: %d\n", errno);
usleep(usec_timeout);
continue;
}
nut_dev = nutscan_new_device();
if (nut_dev == NULL) {
fprintf(stderr, "Memory allocation error\n");
goto end_abort;
}
#ifdef HAVE_PTHREAD
pthread_mutex_lock(&dev_mutex);
#endif
upsdebugx(5,
"Some host at IP %s replied to NetXML UDP request on port %d, "
"inspecting the response...",
string, port_udp);
nut_dev->type = TYPE_XML;
/* Try to read device type */
ne_xml_parser *parser = (*nut_ne_xml_create)();
(*nut_ne_xml_push_handler)(parser, startelm_cb,
NULL, NULL, nut_dev);
/* recv_size is a ssize_t, so in range of size_t */
(*nut_ne_xml_parse)(parser, buf, (size_t)recv_size);
int parserFailed = (*nut_ne_xml_failed)(parser); /* 0 = ok, nonzero = fail */
(*nut_ne_xml_destroy)(parser);
if (parserFailed == 0) {
nut_dev->driver = strdup("netxml-ups");
sprintf(buf, "http://%s", string);
nut_dev->port = strdup(buf);
upsdebugx(3,
"nutscan_scan_xml_http_generic(): "
"Adding configuration for driver='%s' port='%s'",
nut_dev->driver, nut_dev->port);
dev_ret = nutscan_add_device_to_device(
dev_ret, nut_dev);
#ifdef HAVE_PTHREAD
pthread_mutex_unlock(&dev_mutex);
#endif
}
else
{
fprintf(stderr,
"Device at IP %s replied with NetXML but was not deemed compatible "
"with 'netxml-ups' driver (unsupported protocol version, etc.)\n",
string);
nutscan_free_device(nut_dev);
nut_dev = NULL;
#ifdef HAVE_PTHREAD
pthread_mutex_unlock(&dev_mutex);
#endif
if (ip == NULL) {
/* skip this device; note that for a
* broadcast scan there may be more
* in the loop's queue */
continue;
}
}
if (ip != NULL) {
upsdebugx(2,
"nutscan_scan_xml_http_generic(): we collected one reply "
"to unicast for %s (repsponse from %s), done",
ip, string);
goto end;
}
} /* while select() responses */
if (ip == NULL && dev_ret != NULL) {
upsdebugx(2,
"nutscan_scan_xml_http_generic(): we collected one round of replies "
"to broadcast with no errors, done");
goto end;
}
}
}
upsdebugx(2,
"nutscan_scan_xml_http_generic(): no replies collected for %s, done",
(ip ? ip : "<broadcast>"));
goto end;
end_abort:
upsdebugx(1,
"Had to abort nutscan_scan_xml_http_generic() for %s, see fatal details above",
(ip ? ip : "<broadcast>"));
end:
if (ip != NULL) /* do not free "ip", it comes from caller */
close(peerSocket);
return NULL;
}
nutscan_device_t * nutscan_scan_xml_http_range(const char * start_ip, const char * end_ip, useconds_t usec_timeout, nutscan_xml_t * sec)
{
bool_t pass = TRUE; /* Track that we may spawn a scanning thread */
nutscan_xml_t * tmp_sec = NULL;
nutscan_device_t * result = NULL;
if (!nutscan_avail_xml_http) {
return NULL;
}
if (start_ip == NULL && end_ip != NULL) {
start_ip = end_ip;
}
if (start_ip == NULL) {
upsdebugx(1, "Scanning XML/HTTP bus using broadcast.");
} else {
if ((start_ip == end_ip) || (end_ip == NULL) || (0 == strncmp(start_ip, end_ip, 128))) {
upsdebugx(1, "Scanning XML/HTTP bus for single IP (%s).", start_ip);
} else {
/* Iterate the range of IPs to scan */
nutscan_ip_iter_t ip;
char * ip_str = NULL;
#ifdef HAVE_PTHREAD
# ifdef HAVE_SEMAPHORE
sem_t * semaphore = nutscan_semaphore();
sem_t semaphore_scantype_inst;
sem_t * semaphore_scantype = &semaphore_scantype_inst;
# endif /* HAVE_SEMAPHORE */
pthread_t thread;
nutscan_thread_t * thread_array = NULL;
size_t thread_count = 0, i;
# if (defined HAVE_PTHREAD_TRYJOIN) || (defined HAVE_SEMAPHORE)
size_t max_threads_scantype = max_threads_netxml;
# endif
pthread_mutex_init(&dev_mutex, NULL);
# ifdef HAVE_SEMAPHORE
if (max_threads_scantype > 0) {
if (SIZE_MAX > UINT_MAX && max_threads_scantype > UINT_MAX) {
upsdebugx(1,
"WARNING: %s: Limiting max_threads_scantype to range acceptable for sem_init()",
__func__);
max_threads_scantype = UINT_MAX - 1;
}
sem_init(semaphore_scantype, 0, (unsigned int)max_threads_scantype);
}
# endif /* HAVE_SEMAPHORE */
#endif /* HAVE_PTHREAD */
ip_str = nutscan_ip_iter_init(&ip, start_ip, end_ip);
while (ip_str != NULL) {
#ifdef HAVE_PTHREAD
/* NOTE: With many enough targets to scan, this can crash
* by spawning too many children; add a limit and loop to
* "reap" some already done with their work. And probably
* account them in thread_array[] as something to not wait
* for below in pthread_join()...
*/
# ifdef HAVE_SEMAPHORE
/* Just wait for someone to free a semaphored slot,
* if none are available, and then/otherwise grab one
*/
if (thread_array == NULL) {
/* Starting point, or after a wait to complete
* all earlier runners */
if (max_threads_scantype > 0)
sem_wait(semaphore_scantype);
sem_wait(semaphore);
pass = TRUE;
} else {
pass = ((max_threads_scantype == 0 || sem_trywait(semaphore_scantype) == 0) &&
sem_trywait(semaphore) == 0);
}
# else
# ifdef HAVE_PTHREAD_TRYJOIN
/* A somewhat naive and brute-force solution for
* systems without a semaphore.h. This may suffer
* some off-by-one errors, using a few more threads
* than intended (if we race a bit at the wrong time,
* probably up to one per enabled scanner routine).
*/
/* TOTHINK: Should there be a threadcount_mutex when
* we just read the value in if() and while() below?
* At worst we would overflow the limit a bit due to
* other protocol scanners...
*/
if (curr_threads >= max_threads
|| (curr_threads >= max_threads_scantype && max_threads_scantype > 0)
) {
upsdebugx(2, "%s: already running %zu scanning threads "
"(launched overall: %zu), "
"waiting until some would finish",
__func__, curr_threads, thread_count);
while (curr_threads >= max_threads
|| (curr_threads >= max_threads_scantype && max_threads_scantype > 0)
) {
for (i = 0; i < thread_count ; i++) {
int ret;
if (!thread_array[i].active) continue;
pthread_mutex_lock(&threadcount_mutex);
upsdebugx(3, "%s: Trying to join thread #%i...", __func__, i);
ret = pthread_tryjoin_np(thread_array[i].thread, NULL);
switch (ret) {
case ESRCH: /* No thread with the ID thread could be found - already "joined"? */
upsdebugx(5, "%s: Was thread #%zu joined earlier?", __func__, i);
break;
case 0: /* thread exited */
if (curr_threads > 0) {
curr_threads --;
upsdebugx(4, "%s: Joined a finished thread #%zu", __func__, i);
} else {
/* threadcount_mutex fault? */
upsdebugx(0, "WARNING: %s: Accounting of thread count "
"says we are already at 0", __func__);
}
thread_array[i].active = FALSE;
break;
case EBUSY: /* actively running */
upsdebugx(6, "%s: thread #%zu still busy (%i)",
__func__, i, ret);
break;
case EDEADLK: /* Errors with thread interactions... bail out? */
case EINVAL: /* Errors with thread interactions... bail out? */
default: /* new pthreads abilities? */
upsdebugx(5, "%s: thread #%zu reported code %i",
__func__, i, ret);
break;
}
pthread_mutex_unlock(&threadcount_mutex);
}
if (curr_threads >= max_threads
|| (curr_threads >= max_threads_scantype && max_threads_scantype > 0)
) {
usleep (10000); /* microSec's, so 0.01s here */
}
}
upsdebugx(2, "%s: proceeding with scan", __func__);
}
/* NOTE: No change to default "pass" in this ifdef:
* if we got to this line, we have a slot to use */
# endif /* HAVE_PTHREAD_TRYJOIN */
# endif /* HAVE_SEMAPHORE */
#endif /* HAVE_PTHREAD */
if (pass) {
tmp_sec = malloc(sizeof(nutscan_xml_t));
if (tmp_sec == NULL) {
fprintf(stderr,
"Memory allocation error\n");
return NULL;
}
memcpy(tmp_sec, sec, sizeof(nutscan_xml_t));
tmp_sec->peername = ip_str;
if (tmp_sec->usec_timeout <= 0) {
tmp_sec->usec_timeout = usec_timeout;
}
#ifdef HAVE_PTHREAD
if (pthread_create(&thread, NULL, nutscan_scan_xml_http_generic, (void *)tmp_sec) == 0) {
# ifdef HAVE_PTHREAD_TRYJOIN
pthread_mutex_lock(&threadcount_mutex);
curr_threads++;
# endif /* HAVE_PTHREAD_TRYJOIN */
thread_count++;
nutscan_thread_t *new_thread_array = realloc(thread_array,
thread_count*sizeof(nutscan_thread_t));
if (new_thread_array == NULL) {
upsdebugx(1, "%s: Failed to realloc thread array", __func__);
break;
}
else {
thread_array = new_thread_array;
}
thread_array[thread_count - 1].thread = thread;
thread_array[thread_count - 1].active = TRUE;
# ifdef HAVE_PTHREAD_TRYJOIN
pthread_mutex_unlock(&threadcount_mutex);
# endif /* HAVE_PTHREAD_TRYJOIN */
}
#else /* not HAVE_PTHREAD */
nutscan_scan_xml_http_generic((void *)tmp_sec);
#endif /* if HAVE_PTHREAD */
/* free(ip_str); */ /* One of these free()s seems to cause a double-free instead */
ip_str = nutscan_ip_iter_inc(&ip);
/* free(tmp_sec); */
} else { /* if not pass -- all slots busy */
#ifdef HAVE_PTHREAD
# ifdef HAVE_SEMAPHORE
/* Wait for all current scans to complete */
if (thread_array != NULL) {
upsdebugx (2, "%s: Running too many scanning threads, "
"waiting until older ones would finish",
__func__);
for (i = 0; i < thread_count ; i++) {
int ret;
if (!thread_array[i].active) {
/* Probably should not get here,
* but handle it just in case */
upsdebugx(0, "WARNING: %s: Midway clean-up: did not expect thread %zu to be not active",
__func__, i);
sem_post(semaphore);
if (max_threads_scantype > 0)
sem_post(semaphore_scantype);
continue;
}
thread_array[i].active = FALSE;
ret = pthread_join(thread_array[i].thread, NULL);
if (ret != 0) {
upsdebugx(0, "WARNING: %s: Midway clean-up: pthread_join() returned code %i",
__func__, ret);
}
sem_post(semaphore);
if (max_threads_scantype > 0)
sem_post(semaphore_scantype);
}
thread_count = 0;
free(thread_array);
thread_array = NULL;
}
# else
# ifdef HAVE_PTHREAD_TRYJOIN
/* TODO: Move the wait-loop for TRYJOIN here? */
# endif /* HAVE_PTHREAD_TRYJOIN */
# endif /* HAVE_SEMAPHORE */
#endif /* HAVE_PTHREAD */
} /* if: could we "pass" or not? */
} /* while */
#ifdef HAVE_PTHREAD
if (thread_array != NULL) {
upsdebugx(2, "%s: all planned scans launched, waiting for threads to complete", __func__);
for (i = 0; i < thread_count; i++) {
int ret;
if (!thread_array[i].active) continue;
ret = pthread_join(thread_array[i].thread, NULL);
if (ret != 0) {
upsdebugx(0, "WARNING: %s: Clean-up: pthread_join() returned code %i",
__func__, ret);
}
thread_array[i].active = FALSE;
# ifdef HAVE_SEMAPHORE
sem_post(semaphore);
if (max_threads_scantype > 0)
sem_post(semaphore_scantype);
# else
# ifdef HAVE_PTHREAD_TRYJOIN
pthread_mutex_lock(&threadcount_mutex);
if (curr_threads > 0) {
curr_threads --;
upsdebugx(5, "%s: Clean-up: Joined a finished thread #%zu",
__func__, i);
} else {
upsdebugx(0, "WARNING: %s: Clean-up: Accounting of thread count "
"says we are already at 0", __func__);
}
pthread_mutex_unlock(&threadcount_mutex);
# endif /* HAVE_PTHREAD_TRYJOIN */
# endif /* HAVE_SEMAPHORE */
}
free(thread_array);
upsdebugx(2, "%s: all threads freed", __func__);
}
pthread_mutex_destroy(&dev_mutex);
# ifdef HAVE_SEMAPHORE
if (max_threads_scantype > 0)
sem_destroy(semaphore_scantype);
# endif /* HAVE_SEMAPHORE */
#endif /* HAVE_PTHREAD */
result = nutscan_rewind_device(dev_ret);
dev_ret = NULL;
return result;
}
}
tmp_sec = malloc(sizeof(nutscan_xml_t));
if (tmp_sec == NULL) {
fprintf(stderr,
"Memory allocation error\n");
return NULL;
}
memcpy(tmp_sec, sec, sizeof(nutscan_xml_t));
if (start_ip == NULL) {
tmp_sec->peername = NULL;
} else {
tmp_sec->peername = strdup(start_ip);
}
if (tmp_sec->usec_timeout <= 0) {
tmp_sec->usec_timeout = usec_timeout;
}
nutscan_scan_xml_http_generic(tmp_sec);
result = nutscan_rewind_device(dev_ret);
dev_ret = NULL;
free(tmp_sec);
return result;
}
#else /* WITH_NEON */
nutscan_device_t * nutscan_scan_xml_http_range(const char * start_ip, const char * end_ip, useconds_t usec_timeout, nutscan_xml_t * sec)
{
NUT_UNUSED_VARIABLE(start_ip);
NUT_UNUSED_VARIABLE(end_ip);
NUT_UNUSED_VARIABLE(usec_timeout);
NUT_UNUSED_VARIABLE(sec);
return NULL;
}
#endif /* WITH_NEON */
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