/*****************************************************************************
*
* Monitoring check_curl plugin
*
* License: GPL
* Copyright (c) 1999-2018 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the check_curl plugin
*
* This plugin tests the HTTP service on the specified host. It can test
* normal (http) and secure (https) servers, follow redirects, search for
* strings and regular expressions, check connection times, and report on
* certificate expiration times.
*
* This plugin uses functions from the curl library, see
* http://curl.haxx.se
*
* 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 3 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, see .
*
*
*****************************************************************************/
const char *progname = "check_curl";
const char *copyright = "2006-2018";
const char *email = "devel@monitoring-plugins.org";
#include
#include "common.h"
#include "utils.h"
#ifndef LIBCURL_PROTOCOL_HTTP
#error libcurl compiled without HTTP support, compiling check_curl plugin does not makes a lot of sense
#endif
#include "curl/curl.h"
#include "curl/easy.h"
#include "picohttpparser.h"
#include "uriparser/Uri.h"
#include
#define MAKE_LIBCURL_VERSION(major, minor, patch) ((major)*0x10000 + (minor)*0x100 + (patch))
#define DEFAULT_BUFFER_SIZE 2048
#define DEFAULT_SERVER_URL "/"
#define HTTP_EXPECT "HTTP/"
#define DEFAULT_MAX_REDIRS 15
#define INET_ADDR_MAX_SIZE INET6_ADDRSTRLEN
enum {
MAX_IPV4_HOSTLENGTH = 255,
HTTP_PORT = 80,
HTTPS_PORT = 443,
MAX_PORT = 65535
};
enum {
STICKY_NONE = 0,
STICKY_HOST = 1,
STICKY_PORT = 2
};
enum {
FOLLOW_HTTP_CURL = 0,
FOLLOW_LIBCURL = 1
};
/* for buffers for header and body */
typedef struct {
char *buf;
size_t buflen;
size_t bufsize;
} curlhelp_write_curlbuf;
/* for buffering the data sent in PUT */
typedef struct {
char *buf;
size_t buflen;
off_t pos;
} curlhelp_read_curlbuf;
/* for parsing the HTTP status line */
typedef struct {
int http_major; /* major version of the protocol, always 1 (HTTP/0.9
* never reached the big internet most likely) */
int http_minor; /* minor version of the protocol, usually 0 or 1 */
int http_code; /* HTTP return code as in RFC 2145 */
int http_subcode; /* Microsoft IIS extension, HTTP subcodes, see
* http://support.microsoft.com/kb/318380/en-us */
const char *msg; /* the human readable message */
char *first_line; /* a copy of the first line */
} curlhelp_statusline;
/* to know the underlying SSL library used by libcurl */
typedef enum curlhelp_ssl_library {
CURLHELP_SSL_LIBRARY_UNKNOWN,
CURLHELP_SSL_LIBRARY_OPENSSL,
CURLHELP_SSL_LIBRARY_LIBRESSL,
CURLHELP_SSL_LIBRARY_GNUTLS,
CURLHELP_SSL_LIBRARY_NSS
} curlhelp_ssl_library;
enum {
REGS = 2,
MAX_RE_SIZE = 256
};
#include "regex.h"
regex_t preg;
regmatch_t pmatch[REGS];
char regexp[MAX_RE_SIZE];
int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
int errcode;
int invert_regex = 0;
char *server_address;
char *host_name;
char *server_url = 0;
char server_ip[DEFAULT_BUFFER_SIZE];
struct curl_slist *server_ips = NULL;
int specify_port = FALSE;
unsigned short server_port = HTTP_PORT;
unsigned short virtual_port = 0;
int host_name_length;
char output_header_search[30] = "";
char output_string_search[30] = "";
char *warning_thresholds = NULL;
char *critical_thresholds = NULL;
int days_till_exp_warn, days_till_exp_crit;
thresholds *thlds;
char user_agent[DEFAULT_BUFFER_SIZE];
int verbose = 0;
int show_extended_perfdata = FALSE;
int min_page_len = 0;
int max_page_len = 0;
int redir_depth = 0;
int max_depth = DEFAULT_MAX_REDIRS;
char *http_method = NULL;
char *http_post_data = NULL;
char *http_content_type = NULL;
CURL *curl;
struct curl_slist *header_list = NULL;
curlhelp_write_curlbuf body_buf;
curlhelp_write_curlbuf header_buf;
curlhelp_statusline status_line;
curlhelp_read_curlbuf put_buf;
char http_header[DEFAULT_BUFFER_SIZE];
long code;
long socket_timeout = DEFAULT_SOCKET_TIMEOUT;
double total_time;
double time_connect;
double time_appconnect;
double time_headers;
double time_firstbyte;
char errbuf[CURL_ERROR_SIZE+1];
CURLcode res;
char url[DEFAULT_BUFFER_SIZE];
char msg[DEFAULT_BUFFER_SIZE];
char perfstring[DEFAULT_BUFFER_SIZE];
char header_expect[MAX_INPUT_BUFFER] = "";
char string_expect[MAX_INPUT_BUFFER] = "";
char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
int server_expect_yn = 0;
char user_auth[MAX_INPUT_BUFFER] = "";
char proxy_auth[MAX_INPUT_BUFFER] = "";
char **http_opt_headers;
int http_opt_headers_count = 0;
int display_html = FALSE;
int onredirect = STATE_OK;
int followmethod = FOLLOW_HTTP_CURL;
int followsticky = STICKY_NONE;
int use_ssl = FALSE;
int use_sni = TRUE;
int check_cert = FALSE;
typedef union {
struct curl_slist* to_info;
struct curl_certinfo* to_certinfo;
} cert_ptr_union;
cert_ptr_union cert_ptr;
int ssl_version = CURL_SSLVERSION_DEFAULT;
char *client_cert = NULL;
char *client_privkey = NULL;
char *ca_cert = NULL;
int is_openssl_callback = FALSE;
#if defined(HAVE_SSL) && defined(USE_OPENSSL)
X509 *cert = NULL;
#endif /* defined(HAVE_SSL) && defined(USE_OPENSSL) */
int no_body = FALSE;
int maximum_age = -1;
int address_family = AF_UNSPEC;
curlhelp_ssl_library ssl_library = CURLHELP_SSL_LIBRARY_UNKNOWN;
int curl_http_version = CURL_HTTP_VERSION_NONE;
int process_arguments (int, char**);
void handle_curl_option_return_code (CURLcode res, const char* option);
int check_http (void);
void redir (curlhelp_write_curlbuf*);
char *perfd_time (double microsec);
char *perfd_time_connect (double microsec);
char *perfd_time_ssl (double microsec);
char *perfd_time_firstbyte (double microsec);
char *perfd_time_headers (double microsec);
char *perfd_time_transfer (double microsec);
char *perfd_size (int page_len);
void print_help (void);
void print_usage (void);
void print_curl_version (void);
int curlhelp_initwritebuffer (curlhelp_write_curlbuf*);
int curlhelp_buffer_write_callback (void*, size_t , size_t , void*);
void curlhelp_freewritebuffer (curlhelp_write_curlbuf*);
int curlhelp_initreadbuffer (curlhelp_read_curlbuf *, const char *, size_t);
int curlhelp_buffer_read_callback (void *, size_t , size_t , void *);
void curlhelp_freereadbuffer (curlhelp_read_curlbuf *);
curlhelp_ssl_library curlhelp_get_ssl_library (CURL*);
const char* curlhelp_get_ssl_library_string (curlhelp_ssl_library);
int net_noopenssl_check_certificate (cert_ptr_union*, int, int);
int curlhelp_parse_statusline (const char*, curlhelp_statusline *);
void curlhelp_free_statusline (curlhelp_statusline *);
char *get_header_value (const struct phr_header* headers, const size_t nof_headers, const char* header);
int check_document_dates (const curlhelp_write_curlbuf *, char (*msg)[DEFAULT_BUFFER_SIZE]);
int get_content_length (const curlhelp_write_curlbuf* header_buf, const curlhelp_write_curlbuf* body_buf);
#if defined(HAVE_SSL) && defined(USE_OPENSSL)
int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int days_till_exp_crit);
#endif /* defined(HAVE_SSL) && defined(USE_OPENSSL) */
void remove_newlines (char *);
void test_file (char *);
int
main (int argc, char **argv)
{
int result = STATE_UNKNOWN;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* Parse extra opts if any */
argv = np_extra_opts (&argc, argv, progname);
/* set defaults */
snprintf( user_agent, DEFAULT_BUFFER_SIZE, "%s/v%s (monitoring-plugins %s, %s)",
progname, NP_VERSION, VERSION, curl_version());
/* parse arguments */
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
if (display_html == TRUE)
printf ("",
use_ssl ? "https" : "http",
host_name ? host_name : server_address,
virtual_port ? virtual_port : server_port,
server_url);
result = check_http ();
return result;
}
#ifdef HAVE_SSL
#ifdef USE_OPENSSL
int verify_callback(int preverify_ok, X509_STORE_CTX *x509_ctx)
{
/* TODO: we get all certificates of the chain, so which ones
* should we test?
* TODO: is the last certificate always the server certificate?
*/
cert = X509_STORE_CTX_get_current_cert(x509_ctx);
return 1;
}
CURLcode sslctxfun(CURL *curl, SSL_CTX *sslctx, void *parm)
{
SSL_CTX_set_verify(sslctx, SSL_VERIFY_PEER, verify_callback);
return CURLE_OK;
}
#endif /* USE_OPENSSL */
#endif /* HAVE_SSL */
/* Checks if the server 'reply' is one of the expected 'statuscodes' */
static int
expected_statuscode (const char *reply, const char *statuscodes)
{
char *expected, *code;
int result = 0;
if ((expected = strdup (statuscodes)) == NULL)
die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
for (code = strtok (expected, ","); code != NULL; code = strtok (NULL, ","))
if (strstr (reply, code) != NULL) {
result = 1;
break;
}
free (expected);
return result;
}
void
handle_curl_option_return_code (CURLcode res, const char* option)
{
if (res != CURLE_OK) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("Error while setting cURL option '%s': cURL returned %d - %s"),
option, res, curl_easy_strerror(res));
die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
}
}
int
check_http (void)
{
int result = STATE_OK;
int page_len = 0;
int i;
char *force_host_header = NULL;
/* initialize curl */
if (curl_global_init (CURL_GLOBAL_DEFAULT) != CURLE_OK)
die (STATE_UNKNOWN, "HTTP UNKNOWN - curl_global_init failed\n");
if ((curl = curl_easy_init()) == NULL)
die (STATE_UNKNOWN, "HTTP UNKNOWN - curl_easy_init failed\n");
if (verbose >= 1)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_VERBOSE, TRUE), "CURLOPT_VERBOSE");
/* print everything on stdout like check_http would do */
handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_STDERR, stdout), "CURLOPT_STDERR");
/* initialize buffer for body of the answer */
if (curlhelp_initwritebuffer(&body_buf) < 0)
die (STATE_UNKNOWN, "HTTP CRITICAL - out of memory allocating buffer for body\n");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, (curl_write_callback)curlhelp_buffer_write_callback), "CURLOPT_WRITEFUNCTION");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_WRITEDATA, (void *)&body_buf), "CURLOPT_WRITEDATA");
/* initialize buffer for header of the answer */
if (curlhelp_initwritebuffer( &header_buf ) < 0)
die (STATE_UNKNOWN, "HTTP CRITICAL - out of memory allocating buffer for header\n" );
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_HEADERFUNCTION, (curl_write_callback)curlhelp_buffer_write_callback), "CURLOPT_HEADERFUNCTION");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_WRITEHEADER, (void *)&header_buf), "CURLOPT_WRITEHEADER");
/* set the error buffer */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, errbuf), "CURLOPT_ERRORBUFFER");
/* set timeouts */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CONNECTTIMEOUT, socket_timeout), "CURLOPT_CONNECTTIMEOUT");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_TIMEOUT, socket_timeout), "CURLOPT_TIMEOUT");
/* compose URL: use the address we want to connect to, set Host: header later */
snprintf (url, DEFAULT_BUFFER_SIZE, "%s://%s:%d%s",
use_ssl ? "https" : "http",
use_ssl ? host_name : server_address,
server_port,
server_url
);
if (verbose>=1)
printf ("* curl CURLOPT_URL: %s\n", url);
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_URL, url), "CURLOPT_URL");
/* extract proxy information for legacy proxy https requests */
if (!strcmp(http_method, "CONNECT") || strstr(server_url, "http") == server_url) {
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_PROXY, server_address), "CURLOPT_PROXY");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_PROXYPORT, (long)server_port), "CURLOPT_PROXYPORT");
if (verbose>=2)
printf ("* curl CURLOPT_PROXY: %s:%d\n", server_address, server_port);
http_method = "GET";
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_URL, server_url), "CURLOPT_URL");
}
/* disable body for HEAD request */
if (http_method && !strcmp (http_method, "HEAD" )) {
no_body = TRUE;
}
/* set HTTP protocol version */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_HTTP_VERSION, curl_http_version), "CURLOPT_HTTP_VERSION");
/* set HTTP method */
if (http_method) {
if (!strcmp(http_method, "POST"))
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_POST, 1), "CURLOPT_POST");
else if (!strcmp(http_method, "PUT"))
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_UPLOAD, 1), "CURLOPT_UPLOAD");
else
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CUSTOMREQUEST, http_method), "CURLOPT_CUSTOMREQUEST");
}
/* check if Host header is explicitly set in options */
if (http_opt_headers_count) {
for (i = 0; i < http_opt_headers_count ; i++) {
if (strncmp(http_opt_headers[i], "Host:", 5) == 0) {
force_host_header = http_opt_headers[i];
}
}
}
/* set hostname (virtual hosts), not needed if CURLOPT_CONNECT_TO is used, but left in anyway */
if(host_name != NULL && force_host_header == NULL) {
if((virtual_port != HTTP_PORT && !use_ssl) || (virtual_port != HTTPS_PORT && use_ssl)) {
snprintf(http_header, DEFAULT_BUFFER_SIZE, "Host: %s:%d", host_name, virtual_port);
} else {
snprintf(http_header, DEFAULT_BUFFER_SIZE, "Host: %s", host_name);
}
header_list = curl_slist_append (header_list, http_header);
}
/* always close connection, be nice to servers */
snprintf (http_header, DEFAULT_BUFFER_SIZE, "Connection: close");
header_list = curl_slist_append (header_list, http_header);
/* attach additional headers supplied by the user */
/* optionally send any other header tag */
if (http_opt_headers_count) {
for (i = 0; i < http_opt_headers_count ; i++) {
header_list = curl_slist_append (header_list, http_opt_headers[i]);
}
/* This cannot be free'd here because a redirection will then try to access this and segfault */
/* Covered in a testcase in tests/check_http.t */
/* free(http_opt_headers); */
}
/* set HTTP headers */
handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_HTTPHEADER, header_list ), "CURLOPT_HTTPHEADER");
#ifdef LIBCURL_FEATURE_SSL
/* set SSL version, warn about unsecure or unsupported versions */
if (use_ssl) {
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSLVERSION, ssl_version), "CURLOPT_SSLVERSION");
}
/* client certificate and key to present to server (SSL) */
if (client_cert)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSLCERT, client_cert), "CURLOPT_SSLCERT");
if (client_privkey)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSLKEY, client_privkey), "CURLOPT_SSLKEY");
if (ca_cert) {
/* per default if we have a CA verify both the peer and the
* hostname in the certificate, can be switched off later */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CAINFO, ca_cert), "CURLOPT_CAINFO");
handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_SSL_VERIFYPEER, 1), "CURLOPT_SSL_VERIFYPEER");
handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_SSL_VERIFYHOST, 2), "CURLOPT_SSL_VERIFYHOST");
} else {
/* backward-compatible behaviour, be tolerant in checks
* TODO: depending on more options have aspects we want
* to be less tolerant about ssl verfications
*/
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0), "CURLOPT_SSL_VERIFYPEER");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0), "CURLOPT_SSL_VERIFYHOST");
}
/* detect SSL library used by libcurl */
ssl_library = curlhelp_get_ssl_library (curl);
/* try hard to get a stack of certificates to verify against */
if (check_cert) {
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 1)
/* inform curl to report back certificates */
switch (ssl_library) {
case CURLHELP_SSL_LIBRARY_OPENSSL:
case CURLHELP_SSL_LIBRARY_LIBRESSL:
/* set callback to extract certificate with OpenSSL context function (works with
* OpenSSL-style libraries only!) */
#ifdef USE_OPENSSL
/* libcurl and monitoring plugins built with OpenSSL, good */
handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun), "CURLOPT_SSL_CTX_FUNCTION");
is_openssl_callback = TRUE;
#else /* USE_OPENSSL */
#endif /* USE_OPENSSL */
/* libcurl is built with OpenSSL, monitoring plugins, so falling
* back to manually extracting certificate information */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CERTINFO, 1L), "CURLOPT_CERTINFO");
break;
case CURLHELP_SSL_LIBRARY_NSS:
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
/* NSS: support for CERTINFO is implemented since 7.34.0 */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CERTINFO, 1L), "CURLOPT_CERTINFO");
#else /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (libcurl linked with SSL library '%s' is too old)\n", curlhelp_get_ssl_library_string (ssl_library));
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
break;
case CURLHELP_SSL_LIBRARY_GNUTLS:
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 42, 0)
/* GnuTLS: support for CERTINFO is implemented since 7.42.0 */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CERTINFO, 1L), "CURLOPT_CERTINFO");
#else /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 42, 0) */
die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (libcurl linked with SSL library '%s' is too old)\n", curlhelp_get_ssl_library_string (ssl_library));
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 42, 0) */
break;
case CURLHELP_SSL_LIBRARY_UNKNOWN:
default:
die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (unknown SSL library '%s', must implement first)\n", curlhelp_get_ssl_library_string (ssl_library));
break;
}
#else /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 1) */
/* old libcurl, our only hope is OpenSSL, otherwise we are out of luck */
if (ssl_library == CURLHELP_SSL_LIBRARY_OPENSSL || ssl_library == CURLHELP_SSL_LIBRARY_LIBRESSL)
handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun), "CURLOPT_SSL_CTX_FUNCTION");
else
die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (no CURLOPT_SSL_CTX_FUNCTION, no OpenSSL library or libcurl too old and has no CURLOPT_CERTINFO)\n");
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 1) */
}
#endif /* LIBCURL_FEATURE_SSL */
/* set default or user-given user agent identification */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_USERAGENT, user_agent), "CURLOPT_USERAGENT");
/* proxy-authentication */
if (strcmp(proxy_auth, ""))
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_PROXYUSERPWD, proxy_auth), "CURLOPT_PROXYUSERPWD");
/* authentication */
if (strcmp(user_auth, ""))
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_USERPWD, user_auth), "CURLOPT_USERPWD");
/* TODO: parameter auth method, bitfield of following methods:
* CURLAUTH_BASIC (default)
* CURLAUTH_DIGEST
* CURLAUTH_DIGEST_IE
* CURLAUTH_NEGOTIATE
* CURLAUTH_NTLM
* CURLAUTH_NTLM_WB
*
* convenience tokens for typical sets of methods:
* CURLAUTH_ANYSAFE: most secure, without BASIC
* or CURLAUTH_ANY: most secure, even BASIC if necessary
*
* handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_HTTPAUTH, (long)CURLAUTH_DIGEST ), "CURLOPT_HTTPAUTH");
*/
/* handle redirections */
if (onredirect == STATE_DEPENDENT) {
if( followmethod == FOLLOW_LIBCURL ) {
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1), "CURLOPT_FOLLOWLOCATION");
/* default -1 is infinite, not good, could lead to zombie plugins!
Setting it to one bigger than maximal limit to handle errors nicely below
*/
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_MAXREDIRS, max_depth+1), "CURLOPT_MAXREDIRS");
/* for now allow only http and https (we are a http(s) check plugin in the end) */
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 4)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS), "CURLOPT_REDIRECT_PROTOCOLS");
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 4) */
/* TODO: handle the following aspects of redirection, make them
* command line options too later:
CURLOPT_POSTREDIR: method switch
CURLINFO_REDIRECT_URL: custom redirect option
CURLOPT_REDIRECT_PROTOCOLS: allow people to step outside safe protocols
CURLINFO_REDIRECT_COUNT: get the number of redirects, print it, maybe a range option here is nice like for expected page size?
*/
} else {
/* old style redirection is handled below */
}
}
/* no-body */
if (no_body)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_NOBODY, 1), "CURLOPT_NOBODY");
/* IPv4 or IPv6 forced DNS resolution */
if (address_family == AF_UNSPEC)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_WHATEVER), "CURLOPT_IPRESOLVE(CURL_IPRESOLVE_WHATEVER)");
else if (address_family == AF_INET)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4), "CURLOPT_IPRESOLVE(CURL_IPRESOLVE_V4)");
#if defined (USE_IPV6) && defined (LIBCURL_FEATURE_IPV6)
else if (address_family == AF_INET6)
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6), "CURLOPT_IPRESOLVE(CURL_IPRESOLVE_V6)");
#endif
/* either send http POST data (any data, not only POST)*/
if (!strcmp(http_method, "POST") ||!strcmp(http_method, "PUT")) {
/* set content of payload for POST and PUT */
if (http_content_type) {
snprintf (http_header, DEFAULT_BUFFER_SIZE, "Content-Type: %s", http_content_type);
header_list = curl_slist_append (header_list, http_header);
}
/* NULL indicates "HTTP Continue" in libcurl, provide an empty string
* in case of no POST/PUT data */
if (!http_post_data)
http_post_data = "";
if (!strcmp(http_method, "POST")) {
/* POST method, set payload with CURLOPT_POSTFIELDS */
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_POSTFIELDS, http_post_data), "CURLOPT_POSTFIELDS");
} else if (!strcmp(http_method, "PUT")) {
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_READFUNCTION, (curl_read_callback)curlhelp_buffer_read_callback), "CURLOPT_READFUNCTION");
curlhelp_initreadbuffer (&put_buf, http_post_data, strlen (http_post_data));
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_READDATA, (void *)&put_buf), "CURLOPT_READDATA");
handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_INFILESIZE, (curl_off_t)strlen (http_post_data)), "CURLOPT_INFILESIZE");
}
}
/* do the request */
res = curl_easy_perform(curl);
if (verbose>=2 && http_post_data)
printf ("**** REQUEST CONTENT ****\n%s\n", http_post_data);
/* free header and server IP resolve lists, we don't need it anymore */
curl_slist_free_all (header_list); header_list = NULL;
curl_slist_free_all (server_ips); server_ips = NULL;
/* Curl errors, result in critical Nagios state */
if (res != CURLE_OK) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("Invalid HTTP response received from host on port %d: cURL returned %d - %s"),
server_port, res, curl_easy_strerror(res));
die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
}
/* certificate checks */
#ifdef LIBCURL_FEATURE_SSL
if (use_ssl == TRUE) {
if (check_cert == TRUE) {
if (is_openssl_callback) {
#ifdef USE_OPENSSL
/* check certificate with OpenSSL functions, curl has been built against OpenSSL
* and we actually have OpenSSL in the monitoring tools
*/
result = np_net_ssl_check_certificate(cert, days_till_exp_warn, days_till_exp_crit);
return result;
#else /* USE_OPENSSL */
die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates - OpenSSL callback used and not linked against OpenSSL\n");
#endif /* USE_OPENSSL */
} else {
int i;
struct curl_slist *slist;
cert_ptr.to_info = NULL;
res = curl_easy_getinfo (curl, CURLINFO_CERTINFO, &cert_ptr.to_info);
if (!res && cert_ptr.to_info) {
#ifdef USE_OPENSSL
/* We have no OpenSSL in libcurl, but we can use OpenSSL for X509 cert parsing
* We only check the first certificate and assume it's the one of the server
*/
const char* raw_cert = NULL;
for (i = 0; i < cert_ptr.to_certinfo->num_of_certs; i++) {
for (slist = cert_ptr.to_certinfo->certinfo[i]; slist; slist = slist->next) {
if (verbose >= 2)
printf ("%d ** %s\n", i, slist->data);
if (strncmp (slist->data, "Cert:", 5) == 0) {
raw_cert = &slist->data[5];
goto GOT_FIRST_CERT;
}
}
}
GOT_FIRST_CERT:
if (!raw_cert) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("Cannot retrieve certificates from CERTINFO information - certificate data was empty"));
die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
}
BIO* cert_BIO = BIO_new (BIO_s_mem());
BIO_write (cert_BIO, raw_cert, strlen(raw_cert));
cert = PEM_read_bio_X509 (cert_BIO, NULL, NULL, NULL);
if (!cert) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("Cannot read certificate from CERTINFO information - BIO error"));
die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
}
BIO_free (cert_BIO);
result = np_net_ssl_check_certificate(cert, days_till_exp_warn, days_till_exp_crit);
return result;
#else /* USE_OPENSSL */
/* We assume we don't have OpenSSL and np_net_ssl_check_certificate at our disposal,
* so we use the libcurl CURLINFO data
*/
result = net_noopenssl_check_certificate(&cert_ptr, days_till_exp_warn, days_till_exp_crit);
return result;
#endif /* USE_OPENSSL */
} else {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("Cannot retrieve certificates - cURL returned %d - %s"),
res, curl_easy_strerror(res));
die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
}
}
}
}
#endif /* LIBCURL_FEATURE_SSL */
/* we got the data and we executed the request in a given time, so we can append
* performance data to the answer always
*/
handle_curl_option_return_code (curl_easy_getinfo (curl, CURLINFO_TOTAL_TIME, &total_time), "CURLINFO_TOTAL_TIME");
page_len = get_content_length(&header_buf, &body_buf);
if(show_extended_perfdata) {
handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_CONNECT_TIME, &time_connect), "CURLINFO_CONNECT_TIME");
handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_APPCONNECT_TIME, &time_appconnect), "CURLINFO_APPCONNECT_TIME");
handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME, &time_headers), "CURLINFO_PRETRANSFER_TIME");
handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME, &time_firstbyte), "CURLINFO_STARTTRANSFER_TIME");
snprintf(perfstring, DEFAULT_BUFFER_SIZE, "%s %s %s %s %s %s %s",
perfd_time(total_time),
perfd_size(page_len),
perfd_time_connect(time_connect),
use_ssl == TRUE ? perfd_time_ssl (time_appconnect-time_connect) : "",
perfd_time_headers(time_headers - time_appconnect),
perfd_time_firstbyte(time_firstbyte - time_headers),
perfd_time_transfer(total_time-time_firstbyte)
);
} else {
snprintf(perfstring, DEFAULT_BUFFER_SIZE, "%s %s",
perfd_time(total_time),
perfd_size(page_len)
);
}
/* return a CRITICAL status if we couldn't read any data */
if (strlen(header_buf.buf) == 0 && strlen(body_buf.buf) == 0)
die (STATE_CRITICAL, _("HTTP CRITICAL - No header received from host\n"));
/* get status line of answer, check sanity of HTTP code */
if (curlhelp_parse_statusline (header_buf.buf, &status_line) < 0) {
snprintf (msg, DEFAULT_BUFFER_SIZE, "Unparsable status line in %.3g seconds response time|%s\n",
total_time, perfstring);
die (STATE_CRITICAL, "HTTP CRITICAL HTTP/1.x %ld unknown - %s", code, msg);
}
/* get result code from cURL */
handle_curl_option_return_code (curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &code), "CURLINFO_RESPONSE_CODE");
if (verbose>=2)
printf ("* curl CURLINFO_RESPONSE_CODE is %ld\n", code);
/* print status line, header, body if verbose */
if (verbose >= 2) {
printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header_buf.buf,
(no_body ? " [[ skipped ]]" : body_buf.buf));
}
/* make sure the status line matches the response we are looking for */
if (!expected_statuscode(status_line.first_line, server_expect)) {
if (server_port == HTTP_PORT)
snprintf(msg, DEFAULT_BUFFER_SIZE, _("Invalid HTTP response received from host: %s\n"), status_line.first_line);
else
snprintf(msg, DEFAULT_BUFFER_SIZE, _("Invalid HTTP response received from host on port %d: %s\n"), server_port, status_line.first_line);
die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
}
if( server_expect_yn ) {
snprintf(msg, DEFAULT_BUFFER_SIZE, _("Status line output matched \"%s\" - "), server_expect);
if (verbose)
printf ("%s\n",msg);
result = STATE_OK;
}
else {
/* illegal return codes result in a critical state */
if (code >= 600 || code < 100) {
die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%d, %.40s)\n"), status_line.http_code, status_line.msg);
/* server errors result in a critical state */
} else if (code >= 500) {
result = STATE_CRITICAL;
/* client errors result in a warning state */
} else if (code >= 400) {
result = STATE_WARNING;
/* check redirected page if specified */
} else if (code >= 300) {
if (onredirect == STATE_DEPENDENT) {
if( followmethod == FOLLOW_LIBCURL ) {
code = status_line.http_code;
} else {
/* old check_http style redirection, if we come
* back here, we are in the same status as with
* the libcurl method
*/
redir (&header_buf);
}
} else {
/* this is a specific code in the command line to
* be returned when a redirection is encoutered
*/
}
result = max_state_alt (onredirect, result);
/* all other codes are considered ok */
} else {
result = STATE_OK;
}
}
/* libcurl redirection internally, handle error states here */
if( followmethod == FOLLOW_LIBCURL ) {
handle_curl_option_return_code (curl_easy_getinfo (curl, CURLINFO_REDIRECT_COUNT, &redir_depth), "CURLINFO_REDIRECT_COUNT");
if (verbose >= 2)
printf(_("* curl LIBINFO_REDIRECT_COUNT is %d\n"), redir_depth);
if (redir_depth > max_depth) {
snprintf (msg, DEFAULT_BUFFER_SIZE, "maximum redirection depth %d exceeded in libcurl",
max_depth);
die (STATE_WARNING, "HTTP WARNING - %s", msg);
}
}
/* check status codes, set exit status accordingly */
if( status_line.http_code != code ) {
die (STATE_CRITICAL, _("HTTP CRITICAL HTTP/%d.%d %d %s - different HTTP codes (cUrl has %ld)\n"),
status_line.http_major, status_line.http_minor,
status_line.http_code, status_line.msg, code);
}
if (maximum_age >= 0) {
result = max_state_alt(check_document_dates(&header_buf, &msg), result);
}
/* Page and Header content checks go here */
if (strlen (header_expect)) {
if (!strstr (header_buf.buf, header_expect)) {
strncpy(&output_header_search[0],header_expect,sizeof(output_header_search));
if(output_header_search[sizeof(output_header_search)-1]!='\0') {
bcopy("...",&output_header_search[sizeof(output_header_search)-4],4);
}
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%sheader '%s' not found on '%s://%s:%d%s', "), msg, output_header_search, use_ssl ? "https" : "http", host_name ? host_name : server_address, server_port, server_url);
result = STATE_CRITICAL;
}
}
if (strlen (string_expect)) {
if (!strstr (body_buf.buf, string_expect)) {
strncpy(&output_string_search[0],string_expect,sizeof(output_string_search));
if(output_string_search[sizeof(output_string_search)-1]!='\0') {
bcopy("...",&output_string_search[sizeof(output_string_search)-4],4);
}
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%sstring '%s' not found on '%s://%s:%d%s', "), msg, output_string_search, use_ssl ? "https" : "http", host_name ? host_name : server_address, server_port, server_url);
result = STATE_CRITICAL;
}
}
if (strlen (regexp)) {
errcode = regexec (&preg, body_buf.buf, REGS, pmatch, 0);
if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
/* OK - No-op to avoid changing the logic around it */
result = max_state_alt(STATE_OK, result);
}
else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
if (invert_regex == 0)
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spattern not found, "), msg);
else
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spattern found, "), msg);
result = STATE_CRITICAL;
}
else {
regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%sExecute Error: %s, "), msg, errbuf);
result = STATE_UNKNOWN;
}
}
/* make sure the page is of an appropriate size */
if ((max_page_len > 0) && (page_len > max_page_len)) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spage size %d too large, "), msg, page_len);
result = max_state_alt(STATE_WARNING, result);
} else if ((min_page_len > 0) && (page_len < min_page_len)) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spage size %d too small, "), msg, page_len);
result = max_state_alt(STATE_WARNING, result);
}
/* -w, -c: check warning and critical level */
result = max_state_alt(get_status(total_time, thlds), result);
/* Cut-off trailing characters */
if(msg[strlen(msg)-2] == ',')
msg[strlen(msg)-2] = '\0';
else
msg[strlen(msg)-3] = '\0';
/* TODO: separate _() msg and status code: die (result, "HTTP %s: %s\n", state_text(result), msg); */
die (result, "HTTP %s: HTTP/%d.%d %d %s%s%s - %d bytes in %.3f second response time %s|%s\n",
state_text(result), status_line.http_major, status_line.http_minor,
status_line.http_code, status_line.msg,
strlen(msg) > 0 ? " - " : "",
msg, page_len, total_time,
(display_html ? "" : ""),
perfstring);
/* proper cleanup after die? */
curlhelp_free_statusline(&status_line);
curl_easy_cleanup (curl);
curl_global_cleanup ();
curlhelp_freewritebuffer (&body_buf);
curlhelp_freewritebuffer (&header_buf);
if (!strcmp (http_method, "PUT")) {
curlhelp_freereadbuffer (&put_buf);
}
return result;
}
int
uri_strcmp (const UriTextRangeA range, const char* s)
{
if (!range.first) return -1;
if (range.afterLast - range.first < strlen (s)) return -1;
return strncmp (s, range.first, min( range.afterLast - range.first, strlen (s)));
}
char*
uri_string (const UriTextRangeA range, char* buf, size_t buflen)
{
if (!range.first) return "(null)";
strncpy (buf, range.first, max (buflen, range.afterLast - range.first));
buf[max (buflen, range.afterLast - range.first)] = '\0';
buf[range.afterLast - range.first] = '\0';
return buf;
}
void
redir (curlhelp_write_curlbuf* header_buf)
{
char *location = NULL;
curlhelp_statusline status_line;
struct phr_header headers[255];
size_t nof_headers = 255;
size_t msglen;
char buf[DEFAULT_BUFFER_SIZE];
char ipstr[INET_ADDR_MAX_SIZE];
int new_port;
char *new_host;
char *new_url;
int res = phr_parse_response (header_buf->buf, header_buf->buflen,
&status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen,
headers, &nof_headers, 0);
location = get_header_value (headers, nof_headers, "location");
if (verbose >= 2)
printf(_("* Seen redirect location %s\n"), location);
if (++redir_depth > max_depth)
die (STATE_WARNING,
_("HTTP WARNING - maximum redirection depth %d exceeded - %s%s\n"),
max_depth, location, (display_html ? "" : ""));
UriParserStateA state;
UriUriA uri;
state.uri = &uri;
if (uriParseUriA (&state, location) != URI_SUCCESS) {
if (state.errorCode == URI_ERROR_SYNTAX) {
die (STATE_UNKNOWN,
_("HTTP UNKNOWN - Could not parse redirect location '%s'%s\n"),
location, (display_html ? "" : ""));
} else if (state.errorCode == URI_ERROR_MALLOC) {
die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate URL\n"));
}
}
if (verbose >= 2) {
printf (_("** scheme: %s\n"),
uri_string (uri.scheme, buf, DEFAULT_BUFFER_SIZE));
printf (_("** host: %s\n"),
uri_string (uri.hostText, buf, DEFAULT_BUFFER_SIZE));
printf (_("** port: %s\n"),
uri_string (uri.portText, buf, DEFAULT_BUFFER_SIZE));
if (uri.hostData.ip4) {
inet_ntop (AF_INET, uri.hostData.ip4->data, ipstr, sizeof (ipstr));
printf (_("** IPv4: %s\n"), ipstr);
}
if (uri.hostData.ip6) {
inet_ntop (AF_INET, uri.hostData.ip6->data, ipstr, sizeof (ipstr));
printf (_("** IPv6: %s\n"), ipstr);
}
if (uri.pathHead) {
printf (_("** path: "));
const UriPathSegmentA* p = uri.pathHead;
for (; p; p = p->next) {
printf ("/%s", uri_string (p->text, buf, DEFAULT_BUFFER_SIZE));
}
puts ("");
}
if (uri.query.first) {
printf (_("** query: %s\n"),
uri_string (uri.query, buf, DEFAULT_BUFFER_SIZE));
}
if (uri.fragment.first) {
printf (_("** fragment: %s\n"),
uri_string (uri.fragment, buf, DEFAULT_BUFFER_SIZE));
}
}
use_ssl = !uri_strcmp (uri.scheme, "https");
/* we do a sloppy test here only, because uriparser would have failed
* above, if the port would be invalid, we just check for MAX_PORT
*/
if (uri.portText.first) {
new_port = atoi (uri_string (uri.portText, buf, DEFAULT_BUFFER_SIZE));
} else {
new_port = HTTP_PORT;
if (use_ssl)
new_port = HTTPS_PORT;
}
if (new_port > MAX_PORT)
die (STATE_UNKNOWN,
_("HTTP UNKNOWN - Redirection to port above %d - %s%s\n"),
MAX_PORT, location, display_html ? "" : "");
/* by RFC 7231 relative URLs in Location should be taken relative to
* the original URL, so wy try to form a new absolute URL here
*/
if (!uri.scheme.first && !uri.hostText.first) {
new_host = strdup (host_name ? host_name : server_address);
} else {
new_host = strdup (uri_string (uri.hostText, buf, DEFAULT_BUFFER_SIZE));
}
/* compose new path */
/* TODO: handle fragments and query part of URL */
new_url = (char *)calloc( 1, DEFAULT_BUFFER_SIZE);
if (uri.pathHead) {
const UriPathSegmentA* p = uri.pathHead;
for (; p; p = p->next) {
strncat (new_url, "/", DEFAULT_BUFFER_SIZE);
strncat (new_url, uri_string (p->text, buf, DEFAULT_BUFFER_SIZE), DEFAULT_BUFFER_SIZE);
}
}
if (server_port==new_port &&
!strncmp(server_address, new_host, MAX_IPV4_HOSTLENGTH) &&
(host_name && !strncmp(host_name, new_host, MAX_IPV4_HOSTLENGTH)) &&
!strcmp(server_url, new_url))
die (STATE_WARNING,
_("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
use_ssl ? "https" : "http", new_host, new_port, new_url, (display_html ? "" : ""));
/* set new values for redirected request */
if (!(followsticky & STICKY_HOST)) {
free (server_address);
server_address = strndup (new_host, MAX_IPV4_HOSTLENGTH);
}
if (!(followsticky & STICKY_PORT)) {
server_port = (unsigned short)new_port;
}
free (host_name);
host_name = strndup (new_host, MAX_IPV4_HOSTLENGTH);
/* reset virtual port */
virtual_port = server_port;
free(new_host);
free (server_url);
server_url = new_url;
uriFreeUriMembersA (&uri);
if (verbose)
printf (_("Redirection to %s://%s:%d%s\n"), use_ssl ? "https" : "http",
host_name ? host_name : server_address, server_port, server_url);
/* TODO: the hash component MUST be taken from the original URL and
* attached to the URL in Location
*/
check_http ();
}
/* check whether a file exists */
void
test_file (char *path)
{
if (access(path, R_OK) == 0)
return;
usage2 (_("file does not exist or is not readable"), path);
}
int
process_arguments (int argc, char **argv)
{
char *p;
int c = 1;
char *temp;
enum {
INVERT_REGEX = CHAR_MAX + 1,
SNI_OPTION,
CA_CERT_OPTION,
HTTP_VERSION_OPTION
};
int option = 0;
int got_plus = 0;
static struct option longopts[] = {
STD_LONG_OPTS,
{"link", no_argument, 0, 'L'},
{"nohtml", no_argument, 0, 'n'},
{"ssl", optional_argument, 0, 'S'},
{"sni", no_argument, 0, SNI_OPTION},
{"post", required_argument, 0, 'P'},
{"method", required_argument, 0, 'j'},
{"IP-address", required_argument, 0, 'I'},
{"url", required_argument, 0, 'u'},
{"port", required_argument, 0, 'p'},
{"authorization", required_argument, 0, 'a'},
{"proxy-authorization", required_argument, 0, 'b'},
{"header-string", required_argument, 0, 'd'},
{"string", required_argument, 0, 's'},
{"expect", required_argument, 0, 'e'},
{"regex", required_argument, 0, 'r'},
{"ereg", required_argument, 0, 'r'},
{"eregi", required_argument, 0, 'R'},
{"linespan", no_argument, 0, 'l'},
{"onredirect", required_argument, 0, 'f'},
{"certificate", required_argument, 0, 'C'},
{"client-cert", required_argument, 0, 'J'},
{"private-key", required_argument, 0, 'K'},
{"ca-cert", required_argument, 0, CA_CERT_OPTION},
{"useragent", required_argument, 0, 'A'},
{"header", required_argument, 0, 'k'},
{"no-body", no_argument, 0, 'N'},
{"max-age", required_argument, 0, 'M'},
{"content-type", required_argument, 0, 'T'},
{"pagesize", required_argument, 0, 'm'},
{"invert-regex", no_argument, NULL, INVERT_REGEX},
{"use-ipv4", no_argument, 0, '4'},
{"use-ipv6", no_argument, 0, '6'},
{"extended-perfdata", no_argument, 0, 'E'},
{"http-version", required_argument, 0, HTTP_VERSION_OPTION},
{0, 0, 0, 0}
};
if (argc < 2)
return ERROR;
/* support check_http compatible arguments */
for (c = 1; c < argc; c++) {
if (strcmp ("-to", argv[c]) == 0)
strcpy (argv[c], "-t");
if (strcmp ("-hn", argv[c]) == 0)
strcpy (argv[c], "-H");
if (strcmp ("-wt", argv[c]) == 0)
strcpy (argv[c], "-w");
if (strcmp ("-ct", argv[c]) == 0)
strcpy (argv[c], "-c");
if (strcmp ("-nohtml", argv[c]) == 0)
strcpy (argv[c], "-n");
}
server_url = strdup(DEFAULT_SERVER_URL);
while (1) {
c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:j:T:I:a:b:d:e:p:s:R:r:u:f:C:J:K:nlLS::m:M:NE", longopts, &option);
if (c == -1 || c == EOF || c == 1)
break;
switch (c) {
case 'h':
print_help();
exit(STATE_UNKNOWN);
break;
case 'V':
print_revision(progname, NP_VERSION);
print_curl_version();
exit(STATE_UNKNOWN);
break;
case 'v':
verbose++;
break;
case 't': /* timeout period */
if (!is_intnonneg (optarg))
usage2 (_("Timeout interval must be a positive integer"), optarg);
else
socket_timeout = (int)strtol (optarg, NULL, 10);
break;
case 'c': /* critical time threshold */
critical_thresholds = optarg;
break;
case 'w': /* warning time threshold */
warning_thresholds = optarg;
break;
case 'H': /* virtual host */
host_name = strdup (optarg);
if (host_name[0] == '[') {
if ((p = strstr (host_name, "]:")) != NULL) { /* [IPv6]:port */
virtual_port = atoi (p + 2);
/* cut off the port */
host_name_length = strlen (host_name) - strlen (p) - 1;
free (host_name);
host_name = strndup (optarg, host_name_length);
}
} else if ((p = strchr (host_name, ':')) != NULL
&& strchr (++p, ':') == NULL) { /* IPv4:port or host:port */
virtual_port = atoi (p);
/* cut off the port */
host_name_length = strlen (host_name) - strlen (p) - 1;
free (host_name);
host_name = strndup (optarg, host_name_length);
}
break;
case 'I': /* internet address */
server_address = strdup (optarg);
break;
case 'u': /* URL path */
server_url = strdup (optarg);
break;
case 'p': /* Server port */
if (!is_intnonneg (optarg))
usage2 (_("Invalid port number, expecting a non-negative number"), optarg);
else {
if( strtol(optarg, NULL, 10) > MAX_PORT)
usage2 (_("Invalid port number, supplied port number is too big"), optarg);
server_port = (unsigned short)strtol(optarg, NULL, 10);
specify_port = TRUE;
}
break;
case 'a': /* authorization info */
strncpy (user_auth, optarg, MAX_INPUT_BUFFER - 1);
user_auth[MAX_INPUT_BUFFER - 1] = 0;
break;
case 'b': /* proxy-authorization info */
strncpy (proxy_auth, optarg, MAX_INPUT_BUFFER - 1);
proxy_auth[MAX_INPUT_BUFFER - 1] = 0;
break;
case 'P': /* HTTP POST data in URL encoded format; ignored if settings already */
if (! http_post_data)
http_post_data = strdup (optarg);
if (! http_method)
http_method = strdup("POST");
break;
case 'j': /* Set HTTP method */
if (http_method)
free(http_method);
http_method = strdup (optarg);
break;
case 'A': /* useragent */
strncpy (user_agent, optarg, DEFAULT_BUFFER_SIZE);
user_agent[DEFAULT_BUFFER_SIZE-1] = '\0';
break;
case 'k': /* Additional headers */
if (http_opt_headers_count == 0)
http_opt_headers = malloc (sizeof (char *) * (++http_opt_headers_count));
else
http_opt_headers = realloc (http_opt_headers, sizeof (char *) * (++http_opt_headers_count));
http_opt_headers[http_opt_headers_count - 1] = optarg;
break;
case 'L': /* show html link */
display_html = TRUE;
break;
case 'n': /* do not show html link */
display_html = FALSE;
break;
case 'C': /* Check SSL cert validity */
#ifdef LIBCURL_FEATURE_SSL
if ((temp=strchr(optarg,','))!=NULL) {
*temp='\0';
if (!is_intnonneg (optarg))
usage2 (_("Invalid certificate expiration period"), optarg);
days_till_exp_warn = atoi(optarg);
*temp=',';
temp++;
if (!is_intnonneg (temp))
usage2 (_("Invalid certificate expiration period"), temp);
days_till_exp_crit = atoi (temp);
}
else {
days_till_exp_crit=0;
if (!is_intnonneg (optarg))
usage2 (_("Invalid certificate expiration period"), optarg);
days_till_exp_warn = atoi (optarg);
}
check_cert = TRUE;
goto enable_ssl;
#endif
case 'J': /* use client certificate */
#ifdef LIBCURL_FEATURE_SSL
test_file(optarg);
client_cert = optarg;
goto enable_ssl;
#endif
case 'K': /* use client private key */
#ifdef LIBCURL_FEATURE_SSL
test_file(optarg);
client_privkey = optarg;
goto enable_ssl;
#endif
#ifdef LIBCURL_FEATURE_SSL
case CA_CERT_OPTION: /* use CA chain file */
test_file(optarg);
ca_cert = optarg;
goto enable_ssl;
#endif
case 'S': /* use SSL */
#ifdef LIBCURL_FEATURE_SSL
enable_ssl:
use_ssl = TRUE;
/* ssl_version initialized to CURL_SSLVERSION_DEFAULT as a default.
* Only set if it's non-zero. This helps when we include multiple
* parameters, like -S and -C combinations */
ssl_version = CURL_SSLVERSION_DEFAULT;
if (c=='S' && optarg != NULL) {
char *plus_ptr = strchr(optarg, '+');
if (plus_ptr) {
got_plus = 1;
*plus_ptr = '\0';
}
if (optarg[0] == '2')
ssl_version = CURL_SSLVERSION_SSLv2;
else if (optarg[0] == '3')
ssl_version = CURL_SSLVERSION_SSLv3;
else if (!strcmp (optarg, "1") || !strcmp (optarg, "1.0"))
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
ssl_version = CURL_SSLVERSION_TLSv1_0;
#else
ssl_version = CURL_SSLVERSION_DEFAULT;
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
else if (!strcmp (optarg, "1.1"))
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
ssl_version = CURL_SSLVERSION_TLSv1_1;
#else
ssl_version = CURL_SSLVERSION_DEFAULT;
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
else if (!strcmp (optarg, "1.2"))
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
ssl_version = CURL_SSLVERSION_TLSv1_2;
#else
ssl_version = CURL_SSLVERSION_DEFAULT;
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
else if (!strcmp (optarg, "1.3"))
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 52, 0)
ssl_version = CURL_SSLVERSION_TLSv1_3;
#else
ssl_version = CURL_SSLVERSION_DEFAULT;
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 52, 0) */
else
usage4 (_("Invalid option - Valid SSL/TLS versions: 2, 3, 1, 1.1, 1.2 (with optional '+' suffix)"));
}
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 54, 0)
if (got_plus) {
switch (ssl_version) {
case CURL_SSLVERSION_TLSv1_3:
ssl_version |= CURL_SSLVERSION_MAX_TLSv1_3;
break;
case CURL_SSLVERSION_TLSv1_2:
case CURL_SSLVERSION_TLSv1_1:
case CURL_SSLVERSION_TLSv1_0:
ssl_version |= CURL_SSLVERSION_MAX_DEFAULT;
break;
}
} else {
switch (ssl_version) {
case CURL_SSLVERSION_TLSv1_3:
ssl_version |= CURL_SSLVERSION_MAX_TLSv1_3;
break;
case CURL_SSLVERSION_TLSv1_2:
ssl_version |= CURL_SSLVERSION_MAX_TLSv1_2;
break;
case CURL_SSLVERSION_TLSv1_1:
ssl_version |= CURL_SSLVERSION_MAX_TLSv1_1;
break;
case CURL_SSLVERSION_TLSv1_0:
ssl_version |= CURL_SSLVERSION_MAX_TLSv1_0;
break;
}
}
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 54, 0) */
if (verbose >= 2)
printf(_("* Set SSL/TLS version to %d\n"), ssl_version);
if (specify_port == FALSE)
server_port = HTTPS_PORT;
break;
#else /* LIBCURL_FEATURE_SSL */
/* -C -J and -K fall through to here without SSL */
usage4 (_("Invalid option - SSL is not available"));
break;
case SNI_OPTION: /* --sni is parsed, but ignored, the default is TRUE with libcurl */
use_sni = TRUE;
break;
#endif /* LIBCURL_FEATURE_SSL */
case 'f': /* onredirect */
if (!strcmp (optarg, "ok"))
onredirect = STATE_OK;
else if (!strcmp (optarg, "warning"))
onredirect = STATE_WARNING;
else if (!strcmp (optarg, "critical"))
onredirect = STATE_CRITICAL;
else if (!strcmp (optarg, "unknown"))
onredirect = STATE_UNKNOWN;
else if (!strcmp (optarg, "follow"))
onredirect = STATE_DEPENDENT;
else if (!strcmp (optarg, "stickyport"))
onredirect = STATE_DEPENDENT, followmethod = FOLLOW_HTTP_CURL, followsticky = STICKY_HOST|STICKY_PORT;
else if (!strcmp (optarg, "sticky"))
onredirect = STATE_DEPENDENT, followmethod = FOLLOW_HTTP_CURL, followsticky = STICKY_HOST;
else if (!strcmp (optarg, "follow"))
onredirect = STATE_DEPENDENT, followmethod = FOLLOW_HTTP_CURL, followsticky = STICKY_NONE;
else if (!strcmp (optarg, "curl"))
onredirect = STATE_DEPENDENT, followmethod = FOLLOW_LIBCURL;
else usage2 (_("Invalid onredirect option"), optarg);
if (verbose >= 2)
printf(_("* Following redirects set to %s\n"), state_text(onredirect));
break;
case 'd': /* string or substring */
strncpy (header_expect, optarg, MAX_INPUT_BUFFER - 1);
header_expect[MAX_INPUT_BUFFER - 1] = 0;
break;
case 's': /* string or substring */
strncpy (string_expect, optarg, MAX_INPUT_BUFFER - 1);
string_expect[MAX_INPUT_BUFFER - 1] = 0;
break;
case 'e': /* string or substring */
strncpy (server_expect, optarg, MAX_INPUT_BUFFER - 1);
server_expect[MAX_INPUT_BUFFER - 1] = 0;
server_expect_yn = 1;
break;
case 'T': /* Content-type */
http_content_type = strdup (optarg);
break;
case 'l': /* linespan */
cflags &= ~REG_NEWLINE;
break;
case 'R': /* regex */
cflags |= REG_ICASE;
case 'r': /* regex */
strncpy (regexp, optarg, MAX_RE_SIZE - 1);
regexp[MAX_RE_SIZE - 1] = 0;
errcode = regcomp (&preg, regexp, cflags);
if (errcode != 0) {
(void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
printf (_("Could Not Compile Regular Expression: %s"), errbuf);
return ERROR;
}
break;
case INVERT_REGEX:
invert_regex = 1;
break;
case '4':
address_family = AF_INET;
break;
case '6':
#if defined (USE_IPV6) && defined (LIBCURL_FEATURE_IPV6)
address_family = AF_INET6;
#else
usage4 (_("IPv6 support not available"));
#endif
break;
case 'm': /* min_page_length */
{
char *tmp;
if (strchr(optarg, ':') != (char *)NULL) {
/* range, so get two values, min:max */
tmp = strtok(optarg, ":");
if (tmp == NULL) {
printf("Bad format: try \"-m min:max\"\n");
exit (STATE_WARNING);
} else
min_page_len = atoi(tmp);
tmp = strtok(NULL, ":");
if (tmp == NULL) {
printf("Bad format: try \"-m min:max\"\n");
exit (STATE_WARNING);
} else
max_page_len = atoi(tmp);
} else
min_page_len = atoi (optarg);
break;
}
case 'N': /* no-body */
no_body = TRUE;
break;
case 'M': /* max-age */
{
int L = strlen(optarg);
if (L && optarg[L-1] == 'm')
maximum_age = atoi (optarg) * 60;
else if (L && optarg[L-1] == 'h')
maximum_age = atoi (optarg) * 60 * 60;
else if (L && optarg[L-1] == 'd')
maximum_age = atoi (optarg) * 60 * 60 * 24;
else if (L && (optarg[L-1] == 's' ||
isdigit (optarg[L-1])))
maximum_age = atoi (optarg);
else {
fprintf (stderr, "unparsable max-age: %s\n", optarg);
exit (STATE_WARNING);
}
if (verbose >= 2)
printf ("* Maximal age of document set to %d seconds\n", maximum_age);
}
break;
case 'E': /* show extended perfdata */
show_extended_perfdata = TRUE;
break;
case HTTP_VERSION_OPTION:
curl_http_version = CURL_HTTP_VERSION_NONE;
if (strcmp (optarg, "1.0") == 0) {
curl_http_version = CURL_HTTP_VERSION_1_0;
} else if (strcmp (optarg, "1.1") == 0) {
curl_http_version = CURL_HTTP_VERSION_1_1;
} else if ((strcmp (optarg, "2.0") == 0) || (strcmp (optarg, "2") == 0)) {
#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 33, 0)
curl_http_version = CURL_HTTP_VERSION_2_0;
#else
curl_http_version = CURL_HTTP_VERSION_NONE;
#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 33, 0) */
} else {
fprintf (stderr, "unkown http-version parameter: %s\n", optarg);
exit (STATE_WARNING);
}
break;
case '?':
/* print short usage statement if args not parsable */
usage5 ();
break;
}
}
c = optind;
if (server_address == NULL && c < argc)
server_address = strdup (argv[c++]);
if (host_name == NULL && c < argc)
host_name = strdup (argv[c++]);
if (server_address == NULL) {
if (host_name == NULL)
usage4 (_("You must specify a server address or host name"));
else
server_address = strdup (host_name);
}
set_thresholds(&thlds, warning_thresholds, critical_thresholds);
if (critical_thresholds && thlds->critical->end>(double)socket_timeout)
socket_timeout = (int)thlds->critical->end + 1;
if (verbose >= 2)
printf ("* Socket timeout set to %ld seconds\n", socket_timeout);
if (http_method == NULL)
http_method = strdup ("GET");
if (client_cert && !client_privkey)
usage4 (_("If you use a client certificate you must also specify a private key file"));
if (virtual_port == 0)
virtual_port = server_port;
else {
if ((use_ssl && server_port == HTTPS_PORT) || (!use_ssl && server_port == HTTP_PORT))
if(specify_port == FALSE)
server_port = virtual_port;
}
return TRUE;
}
char *perfd_time (double elapsed_time)
{
return fperfdata ("time", elapsed_time, "s",
thlds->warning?TRUE:FALSE, thlds->warning?thlds->warning->end:0,
thlds->critical?TRUE:FALSE, thlds->critical?thlds->critical->end:0,
TRUE, 0, TRUE, socket_timeout);
}
char *perfd_time_connect (double elapsed_time_connect)
{
return fperfdata ("time_connect", elapsed_time_connect, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
}
char *perfd_time_ssl (double elapsed_time_ssl)
{
return fperfdata ("time_ssl", elapsed_time_ssl, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
}
char *perfd_time_headers (double elapsed_time_headers)
{
return fperfdata ("time_headers", elapsed_time_headers, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
}
char *perfd_time_firstbyte (double elapsed_time_firstbyte)
{
return fperfdata ("time_firstbyte", elapsed_time_firstbyte, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
}
char *perfd_time_transfer (double elapsed_time_transfer)
{
return fperfdata ("time_transfer", elapsed_time_transfer, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
}
char *perfd_size (int page_len)
{
return perfdata ("size", page_len, "B",
(min_page_len>0?TRUE:FALSE), min_page_len,
(min_page_len>0?TRUE:FALSE), 0,
TRUE, 0, FALSE, 0);
}
void
print_help (void)
{
print_revision (progname, NP_VERSION);
printf ("Copyright (c) 1999 Ethan Galstad \n");
printf (COPYRIGHT, copyright, email);
printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
printf ("%s\n", _("certificate expiration times."));
printf ("\n");
printf ("%s\n", _("It makes use of libcurl to do so. It tries to be as compatible to check_http"));
printf ("%s\n", _("as possible."));
printf ("\n\n");
print_usage ();
printf (_("NOTE: One or both of -H and -I must be specified"));
printf ("\n");
printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
printf (" %s\n", "-H, --hostname=ADDRESS");
printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
printf (" %s\n", "-I, --IP-address=ADDRESS");
printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
printf (" %s\n", "-p, --port=INTEGER");
printf (" %s", _("Port number (default: "));
printf ("%d)\n", HTTP_PORT);
printf (UT_IPv46);
#ifdef LIBCURL_FEATURE_SSL
printf (" %s\n", "-S, --ssl=VERSION[+]");
printf (" %s\n", _("Connect via SSL. Port defaults to 443. VERSION is optional, and prevents"));
printf (" %s\n", _("auto-negotiation (2 = SSLv2, 3 = SSLv3, 1 = TLSv1, 1.1 = TLSv1.1,"));
printf (" %s\n", _("1.2 = TLSv1.2). With a '+' suffix, newer versions are also accepted."));
printf (" %s\n", _("Note: SSLv2 and SSLv3 are deprecated and are usually disabled in libcurl"));
printf (" %s\n", "--sni");
printf (" %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
#if LIBCURL_VERSION_NUM >= 0x071801
printf (" %s\n", _("Note: --sni is the default in libcurl as SSLv2 and SSLV3 are deprecated and"));
printf (" %s\n", _(" SNI only really works since TLSv1.0"));
#else
printf (" %s\n", _("Note: SNI is not supported in libcurl before 7.18.1"));
#endif
printf (" %s\n", "-C, --certificate=INTEGER[,INTEGER]");
printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
printf (" %s\n", _("(when this option is used the URL is not checked.)"));
printf (" %s\n", "-J, --client-cert=FILE");
printf (" %s\n", _("Name of file that contains the client certificate (PEM format)"));
printf (" %s\n", _("to be used in establishing the SSL session"));
printf (" %s\n", "-K, --private-key=FILE");
printf (" %s\n", _("Name of file containing the private key (PEM format)"));
printf (" %s\n", _("matching the client certificate"));
printf (" %s\n", "--ca-cert=FILE");
printf (" %s\n", _("CA certificate file to verify peer against"));
#endif
printf (" %s\n", "-e, --expect=STRING");
printf (" %s\n", _("Comma-delimited list of strings, at least one of them is expected in"));
printf (" %s", _("the first (status) line of the server response (default: "));
printf ("%s)\n", HTTP_EXPECT);
printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
printf (" %s\n", "-d, --header-string=STRING");
printf (" %s\n", _("String to expect in the response headers"));
printf (" %s\n", "-s, --string=STRING");
printf (" %s\n", _("String to expect in the content"));
printf (" %s\n", "-u, --url=PATH");
printf (" %s\n", _("URL to GET or POST (default: /)"));
printf (" %s\n", "-P, --post=STRING");
printf (" %s\n", _("URL encoded http POST data"));
printf (" %s\n", "-j, --method=STRING (for example: HEAD, OPTIONS, TRACE, PUT, DELETE, CONNECT)");
printf (" %s\n", _("Set HTTP method."));
printf (" %s\n", "-N, --no-body");
printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
printf (" %s\n", "-M, --max-age=SECONDS");
printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
printf (" %s\n", "-T, --content-type=STRING");
printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
printf (" %s\n", "-l, --linespan");
printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
printf (" %s\n", "-r, --regex, --ereg=STRING");
printf (" %s\n", _("Search page for regex STRING"));
printf (" %s\n", "-R, --eregi=STRING");
printf (" %s\n", _("Search page for case-insensitive regex STRING"));
printf (" %s\n", "--invert-regex");
printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
printf (" %s\n", "-a, --authorization=AUTH_PAIR");
printf (" %s\n", _("Username:password on sites with basic authentication"));
printf (" %s\n", "-b, --proxy-authorization=AUTH_PAIR");
printf (" %s\n", _("Username:password on proxy-servers with basic authentication"));
printf (" %s\n", "-A, --useragent=STRING");
printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
printf (" %s\n", "-k, --header=STRING");
printf (" %s\n", _("Any other tags to be sent in http header. Use multiple times for additional headers"));
printf (" %s\n", "-E, --extended-perfdata");
printf (" %s\n", _("Print additional performance data"));
printf (" %s\n", "-L, --link");
printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
printf (" %s\n", "-f, --onredirect=");
printf (" %s\n", _("How to handle redirected pages. sticky is like follow but stick to the"));
printf (" %s\n", _("specified IP address. stickyport also ensures port stays the same."));
printf (" %s\n", _("follow uses the old redirection algorithm of check_http."));
printf (" %s\n", _("curl uses CURL_FOLLOWLOCATION built into libcurl."));
printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
printf ("\n");
printf (" %s\n", "--http-version=VERSION");
printf (" %s\n", _("Connect via specific HTTP protocol."));
printf (" %s\n", _("1.0 = HTTP/1.0, 1.1 = HTTP/1.1, 2.0 = HTTP/2 (HTTP/2 will fail without -S)"));
printf ("\n");
printf (UT_WARN_CRIT);
printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
printf (UT_VERBOSE);
printf ("\n");
printf ("%s\n", _("Notes:"));
printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect response"));
printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
#ifdef LIBCURL_FEATURE_SSL
printf ("\n");
printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
printf (" %s\n", _("certificate is still valid for the specified number of days."));
printf ("\n");
printf (" %s\n", _("Please note that this plugin does not check if the presented server"));
printf (" %s\n", _("certificate matches the hostname of the server, or if the certificate"));
printf (" %s\n", _("has a valid chain of trust to one of the locally installed CAs."));
printf ("\n");
printf ("%s\n", _("Examples:"));
printf (" %s\n\n", "CHECK CONTENT: check_curl -w 5 -c 10 --ssl -H www.verisign.com");
printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
printf (" %s\n", _("a STATE_CRITICAL will be returned."));
printf ("\n");
printf (" %s\n\n", "CHECK CERTIFICATE: check_curl -H www.verisign.com -C 14");
printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
printf (" %s\n\n", _("the certificate is expired."));
printf ("\n");
printf (" %s\n\n", "CHECK CERTIFICATE: check_curl -H www.verisign.com -C 30,14");
printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 30 days,"));
printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
printf (" %s\n", _("30 days, but more than 14 days, a STATE_WARNING is returned."));
printf (" %s\n", _("A STATE_CRITICAL will be returned when certificate expires in less than 14 days"));
#endif
printf ("\n %s\n", "CHECK WEBSERVER CONTENT VIA PROXY:");
printf (" %s\n", _("It is recommended to use an environment proxy like:"));
printf (" %s\n", _("http_proxy=http://192.168.100.35:3128 ./check_curl -H www.monitoring-plugins.org"));
printf (" %s\n", _("legacy proxy requests in check_http style still work:"));
printf (" %s\n", _("check_curl -I 192.168.100.35 -p 3128 -u http://www.monitoring-plugins.org/ -H www.monitoring-plugins.org"));
#ifdef LIBCURL_FEATURE_SSL
printf ("\n %s\n", "CHECK SSL WEBSERVER CONTENT VIA PROXY USING HTTP 1.1 CONNECT: ");
printf (" %s\n", _("It is recommended to use an environment proxy like:"));
printf (" %s\n", _("https_proxy=http://192.168.100.35:3128 ./check_curl -H www.verisign.com -S"));
printf (" %s\n", _("legacy proxy requests in check_http style still work:"));
printf (" %s\n", _("check_curl -I 192.168.100.35 -p 3128 -u https://www.verisign.com/ -S -j CONNECT -H www.verisign.com "));
printf (" %s\n", _("all these options are needed: -I -p -u -S(sl) -j CONNECT -H "));
printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
printf (" %s\n", _("a STATE_CRITICAL will be returned."));
#endif
printf (UT_SUPPORT);
}
void
print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf (" %s -H | -I [-u ] [-p ]\n",progname);
printf (" [-J ] [-K ] [--ca-cert ]\n");
printf (" [-w ] [-c ] [-t ] [-L] [-E] [-a auth]\n");
printf (" [-b proxy_auth] [-f ]\n");
printf (" [-e ] [-d string] [-s string] [-l] [-r | -R ]\n");
printf (" [-P string] [-m :] [-4|-6] [-N] [-M ]\n");
printf (" [-A string] [-k string] [-S ] [--sni] [-C [,]]\n");
printf (" [-T ] [-j method]\n");
printf (" [--http-version=]\n");
printf ("\n");
printf ("%s\n", _("WARNING: check_curl is experimental. Please use"));
printf ("%s\n\n", _("check_http if you need a stable version."));
}
void
print_curl_version (void)
{
printf( "%s\n", curl_version());
}
int
curlhelp_initwritebuffer (curlhelp_write_curlbuf *buf)
{
buf->bufsize = DEFAULT_BUFFER_SIZE;
buf->buflen = 0;
buf->buf = (char *)malloc ((size_t)buf->bufsize);
if (buf->buf == NULL) return -1;
return 0;
}
int
curlhelp_buffer_write_callback (void *buffer, size_t size, size_t nmemb, void *stream)
{
curlhelp_write_curlbuf *buf = (curlhelp_write_curlbuf *)stream;
while (buf->bufsize < buf->buflen + size * nmemb + 1) {
buf->bufsize *= buf->bufsize * 2;
buf->buf = (char *)realloc (buf->buf, buf->bufsize);
if (buf->buf == NULL) return -1;
}
memcpy (buf->buf + buf->buflen, buffer, size * nmemb);
buf->buflen += size * nmemb;
buf->buf[buf->buflen] = '\0';
return (int)(size * nmemb);
}
int
curlhelp_buffer_read_callback (void *buffer, size_t size, size_t nmemb, void *stream)
{
curlhelp_read_curlbuf *buf = (curlhelp_read_curlbuf *)stream;
size_t n = min (nmemb * size, buf->buflen - buf->pos);
memcpy (buffer, buf->buf + buf->pos, n);
buf->pos += n;
return (int)n;
}
void
curlhelp_freewritebuffer (curlhelp_write_curlbuf *buf)
{
free (buf->buf);
buf->buf = NULL;
}
int
curlhelp_initreadbuffer (curlhelp_read_curlbuf *buf, const char *data, size_t datalen)
{
buf->buflen = datalen;
buf->buf = (char *)malloc ((size_t)buf->buflen);
if (buf->buf == NULL) return -1;
memcpy (buf->buf, data, datalen);
buf->pos = 0;
return 0;
}
void
curlhelp_freereadbuffer (curlhelp_read_curlbuf *buf)
{
free (buf->buf);
buf->buf = NULL;
}
/* TODO: where to put this, it's actually part of sstrings2 (logically)?
*/
const char*
strrstr2(const char *haystack, const char *needle)
{
int counter;
size_t len;
const char *prev_pos;
const char *pos;
if (haystack == NULL || needle == NULL)
return NULL;
if (haystack[0] == '\0' || needle[0] == '\0')
return NULL;
counter = 0;
prev_pos = NULL;
pos = haystack;
len = strlen (needle);
for (;;) {
pos = strstr (pos, needle);
if (pos == NULL) {
if (counter == 0)
return NULL;
else
return prev_pos;
}
counter++;
prev_pos = pos;
pos += len;
if (*pos == '\0') return prev_pos;
}
}
int
curlhelp_parse_statusline (const char *buf, curlhelp_statusline *status_line)
{
char *first_line_end;
char *p;
size_t first_line_len;
char *pp;
const char *start;
char *first_line_buf;
/* find last start of a new header */
start = strrstr2 (buf, "\r\nHTTP");
if (start != NULL) {
start += 2;
buf = start;
}
first_line_end = strstr(buf, "\r\n");
if (first_line_end == NULL) return -1;
first_line_len = (size_t)(first_line_end - buf);
status_line->first_line = (char *)malloc (first_line_len + 1);
if (status_line->first_line == NULL) return -1;
memcpy (status_line->first_line, buf, first_line_len);
status_line->first_line[first_line_len] = '\0';
first_line_buf = strdup( status_line->first_line );
/* protocol and version: "HTTP/x.x" SP or "HTTP/2" SP */
p = strtok(first_line_buf, "/");
if( p == NULL ) { free( first_line_buf ); return -1; }
if( strcmp( p, "HTTP" ) != 0 ) { free( first_line_buf ); return -1; }
p = strtok( NULL, " " );
if( p == NULL ) { free( first_line_buf ); return -1; }
if( strchr( p, '.' ) != NULL ) {
/* HTTP 1.x case */
char *ppp;
ppp = strtok( p, "." );
status_line->http_major = (int)strtol( p, &pp, 10 );
if( *pp != '\0' ) { free( first_line_buf ); return -1; }
ppp = strtok( NULL, " " );
status_line->http_minor = (int)strtol( p, &pp, 10 );
if( *pp != '\0' ) { free( first_line_buf ); return -1; }
p += 4; /* 1.x SP */
} else {
/* HTTP 2 case */
status_line->http_major = (int)strtol( p, &pp, 10 );
status_line->http_minor = 0;
p += 2; /* 2 SP */
}
/* status code: "404" or "404.1", then SP */
p = strtok( p, " " );
if( p == NULL ) { free( first_line_buf ); return -1; }
if( strchr( p, '.' ) != NULL ) {
char *ppp;
ppp = strtok( p, "." );
status_line->http_code = (int)strtol( ppp, &pp, 10 );
if( *pp != '\0' ) { free( first_line_buf ); return -1; }
ppp = strtok( NULL, "" );
status_line->http_subcode = (int)strtol( ppp, &pp, 10 );
if( *pp != '\0' ) { free( first_line_buf ); return -1; }
p += 6; /* 400.1 SP */
} else {
status_line->http_code = (int)strtol( p, &pp, 10 );
status_line->http_subcode = -1;
if( *pp != '\0' ) { free( first_line_buf ); return -1; }
p += 4; /* 400 SP */
}
/* Human readable message: "Not Found" CRLF */
p = strtok( p, "" );
if( p == NULL ) { status_line->msg = ""; return 0; }
status_line->msg = status_line->first_line + ( p - first_line_buf );
free( first_line_buf );
return 0;
}
void
curlhelp_free_statusline (curlhelp_statusline *status_line)
{
free (status_line->first_line);
}
void
remove_newlines (char *s)
{
char *p;
for (p = s; *p != '\0'; p++)
if (*p == '\r' || *p == '\n')
*p = ' ';
}
char *
get_header_value (const struct phr_header* headers, const size_t nof_headers, const char* header)
{
int i;
for( i = 0; i < nof_headers; i++ ) {
if( strncasecmp( header, headers[i].name, max( headers[i].name_len, 4 ) ) == 0 ) {
return strndup( headers[i].value, headers[i].value_len );
}
}
return NULL;
}
int
check_document_dates (const curlhelp_write_curlbuf *header_buf, char (*msg)[DEFAULT_BUFFER_SIZE])
{
char *server_date = NULL;
char *document_date = NULL;
int date_result = STATE_OK;
curlhelp_statusline status_line;
struct phr_header headers[255];
size_t nof_headers = 255;
size_t msglen;
int res = phr_parse_response (header_buf->buf, header_buf->buflen,
&status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen,
headers, &nof_headers, 0);
server_date = get_header_value (headers, nof_headers, "date");
document_date = get_header_value (headers, nof_headers, "last-modified");
if (!server_date || !*server_date) {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sServer date unknown, "), *msg);
date_result = max_state_alt(STATE_UNKNOWN, date_result);
} else if (!document_date || !*document_date) {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sDocument modification date unknown, "), *msg);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else {
time_t srv_data = curl_getdate (server_date, NULL);
time_t doc_data = curl_getdate (document_date, NULL);
if (verbose >= 2)
printf ("* server date: '%s' (%d), doc_date: '%s' (%d)\n", server_date, (int)srv_data, document_date, (int)doc_data);
if (srv_data <= 0) {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sServer date \"%100s\" unparsable, "), *msg, server_date);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else if (doc_data <= 0) {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sDocument date \"%100s\" unparsable, "), *msg, document_date);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else if (doc_data > srv_data + 30) {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sDocument is %d seconds in the future, "), *msg, (int)doc_data - (int)srv_data);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else if (doc_data < srv_data - maximum_age) {
int n = (srv_data - doc_data);
if (n > (60 * 60 * 24 * 2)) {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sLast modified %.1f days ago, "), *msg, ((float) n) / (60 * 60 * 24));
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else {
snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sLast modified %d:%02d:%02d ago, "), *msg, n / (60 * 60), (n / 60) % 60, n % 60);
date_result = max_state_alt(STATE_CRITICAL, date_result);
}
}
}
if (server_date) free (server_date);
if (document_date) free (document_date);
return date_result;
}
int
get_content_length (const curlhelp_write_curlbuf* header_buf, const curlhelp_write_curlbuf* body_buf)
{
const char *s;
int content_length = 0;
char *copy;
struct phr_header headers[255];
size_t nof_headers = 255;
size_t msglen;
char *content_length_s = NULL;
curlhelp_statusline status_line;
int res = phr_parse_response (header_buf->buf, header_buf->buflen,
&status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen,
headers, &nof_headers, 0);
content_length_s = get_header_value (headers, nof_headers, "content-length");
if (!content_length_s) {
return header_buf->buflen + body_buf->buflen;
}
content_length_s += strspn (content_length_s, " \t");
content_length = atoi (content_length_s);
if (content_length != body_buf->buflen) {
/* TODO: should we warn if the actual and the reported body length don't match? */
}
if (content_length_s) free (content_length_s);
return header_buf->buflen + body_buf->buflen;
}
/* TODO: is there a better way in libcurl to check for the SSL library? */
curlhelp_ssl_library
curlhelp_get_ssl_library (CURL* curl)
{
curl_version_info_data* version_data;
char *ssl_version;
char *library;
curlhelp_ssl_library ssl_library = CURLHELP_SSL_LIBRARY_UNKNOWN;
version_data = curl_version_info (CURLVERSION_NOW);
if (version_data == NULL) return CURLHELP_SSL_LIBRARY_UNKNOWN;
ssl_version = strdup (version_data->ssl_version);
if (ssl_version == NULL ) return CURLHELP_SSL_LIBRARY_UNKNOWN;
library = strtok (ssl_version, "/");
if (library == NULL) return CURLHELP_SSL_LIBRARY_UNKNOWN;
if (strcmp (library, "OpenSSL") == 0)
ssl_library = CURLHELP_SSL_LIBRARY_OPENSSL;
else if (strcmp (library, "LibreSSL") == 0)
ssl_library = CURLHELP_SSL_LIBRARY_LIBRESSL;
else if (strcmp (library, "GnuTLS") == 0)
ssl_library = CURLHELP_SSL_LIBRARY_GNUTLS;
else if (strcmp (library, "NSS") == 0)
ssl_library = CURLHELP_SSL_LIBRARY_NSS;
if (verbose >= 2)
printf ("* SSL library string is : %s %s (%d)\n", version_data->ssl_version, library, ssl_library);
free (ssl_version);
return ssl_library;
}
const char*
curlhelp_get_ssl_library_string (curlhelp_ssl_library ssl_library)
{
switch (ssl_library) {
case CURLHELP_SSL_LIBRARY_OPENSSL:
return "OpenSSL";
case CURLHELP_SSL_LIBRARY_LIBRESSL:
return "LibreSSL";
case CURLHELP_SSL_LIBRARY_GNUTLS:
return "GnuTLS";
case CURLHELP_SSL_LIBRARY_NSS:
return "NSS";
case CURLHELP_SSL_LIBRARY_UNKNOWN:
default:
return "unknown";
}
}
#ifdef LIBCURL_FEATURE_SSL
#ifndef USE_OPENSSL
time_t
parse_cert_date (const char *s)
{
struct tm tm;
time_t date;
if (!s) return -1;
strptime (s, "%Y-%m-%d %H:%M:%S GMT", &tm);
date = mktime (&tm);
return date;
}
/* TODO: this needs cleanup in the sslutils.c, maybe we the #else case to
* OpenSSL could be this function
*/
int
net_noopenssl_check_certificate (cert_ptr_union* cert_ptr, int days_till_exp_warn, int days_till_exp_crit)
{
int i;
struct curl_slist* slist;
int cname_found = 0;
char* start_date_str = NULL;
char* end_date_str = NULL;
time_t start_date;
time_t end_date;
char *tz;
float time_left;
int days_left;
int time_remaining;
char timestamp[50] = "";
int status = STATE_UNKNOWN;
if (verbose >= 2)
printf ("**** REQUEST CERTIFICATES ****\n");
for (i = 0; i < cert_ptr->to_certinfo->num_of_certs; i++) {
for (slist = cert_ptr->to_certinfo->certinfo[i]; slist; slist = slist->next) {
/* find first common name in subject, TODO: check alternative subjects for
* multi-host certificate, check wildcards
*/
if (strncasecmp (slist->data, "Subject:", 8) == 0) {
char* p = strstr (slist->data, "CN=");
if (p != NULL) {
if (strncmp (host_name, p+3, strlen (host_name)) == 0) {
cname_found = 1;
}
}
} else if (strncasecmp (slist->data, "Start Date:", 11) == 0) {
start_date_str = &slist->data[11];
} else if (strncasecmp (slist->data, "Expire Date:", 12) == 0) {
end_date_str = &slist->data[12];
} else if (strncasecmp (slist->data, "Cert:", 5) == 0) {
goto HAVE_FIRST_CERT;
}
if (verbose >= 2)
printf ("%d ** %s\n", i, slist->data);
}
}
HAVE_FIRST_CERT:
if (verbose >= 2)
printf ("**** REQUEST CERTIFICATES ****\n");
if (!cname_found) {
printf("%s\n",_("CRITICAL - Cannot retrieve certificate subject."));
return STATE_CRITICAL;
}
start_date = parse_cert_date (start_date_str);
if (start_date <= 0) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("WARNING - Unparsable 'Start Date' in certificate: '%s'"),
start_date_str);
puts (msg);
return STATE_WARNING;
}
end_date = parse_cert_date (end_date_str);
if (end_date <= 0) {
snprintf (msg, DEFAULT_BUFFER_SIZE, _("WARNING - Unparsable 'Expire Date' in certificate: '%s'"),
start_date_str);
puts (msg);
return STATE_WARNING;
}
time_left = difftime (end_date, time(NULL));
days_left = time_left / 86400;
tz = getenv("TZ");
setenv("TZ", "GMT", 1);
tzset();
strftime(timestamp, 50, "%c %z", localtime(&end_date));
if (tz)
setenv("TZ", tz, 1);
else
unsetenv("TZ");
tzset();
if (days_left > 0 && days_left <= days_till_exp_warn) {
printf (_("%s - Certificate '%s' expires in %d day(s) (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", host_name, days_left, timestamp);
if (days_left > days_till_exp_crit)
status = STATE_WARNING;
else
status = STATE_CRITICAL;
} else if (days_left == 0 && time_left > 0) {
if (time_left >= 3600)
time_remaining = (int) time_left / 3600;
else
time_remaining = (int) time_left / 60;
printf (_("%s - Certificate '%s' expires in %u %s (%s)\n"),
(days_left>days_till_exp_crit) ? "WARNING" : "CRITICAL", host_name, time_remaining,
time_left >= 3600 ? "hours" : "minutes", timestamp);
if ( days_left > days_till_exp_crit)
status = STATE_WARNING;
else
status = STATE_CRITICAL;
} else if (time_left < 0) {
printf(_("CRITICAL - Certificate '%s' expired on %s.\n"), host_name, timestamp);
status=STATE_CRITICAL;
} else if (days_left == 0) {
printf (_("%s - Certificate '%s' just expired (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", host_name, timestamp);
if (days_left > days_till_exp_crit)
status = STATE_WARNING;
else
status = STATE_CRITICAL;
} else {
printf(_("OK - Certificate '%s' will expire on %s.\n"), host_name, timestamp);
status = STATE_OK;
}
return status;
}
#endif /* USE_OPENSSL */
#endif /* LIBCURL_FEATURE_SSL */