diff options
Diffstat (limited to 'plugins/check_curl.c')
| -rw-r--r-- | plugins/check_curl.c | 2704 |
1 files changed, 2704 insertions, 0 deletions
diff --git a/plugins/check_curl.c b/plugins/check_curl.c new file mode 100644 index 0000000..153e492 --- /dev/null +++ b/plugins/check_curl.c @@ -0,0 +1,2704 @@ +/***************************************************************************** +* +* Monitoring check_curl plugin +* +* License: GPL +* Copyright (c) 1999-2019 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 <http://www.gnu.org/licenses/>. +* +* +*****************************************************************************/ +const char *progname = "check_curl"; + +const char *copyright = "2006-2019"; +const char *email = "devel@monitoring-plugins.org"; + +#include <stdbool.h> +#include <ctype.h> + +#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 <arpa/inet.h> +#include <netinet/in.h> + +#if defined(HAVE_SSL) && defined(USE_OPENSSL) +#include <openssl/opensslv.h> +#endif + +#include <netdb.h> + +#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 INET_ADDR_MAX_SIZE INET6_ADDRSTRLEN +enum { + MAX_IPV4_HOSTLENGTH = 255, + HTTP_PORT = 80, + HTTPS_PORT = 443, + MAX_PORT = 65535, + DEFAULT_MAX_REDIRS = 15 +}; + +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 = 1024 +}; +#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; +bool invert_regex = false; + +char *server_address = NULL; +char *host_name = NULL; +char *server_url = 0; +char server_ip[DEFAULT_BUFFER_SIZE]; +struct curl_slist *server_ips = NULL; +bool 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; +bool show_extended_perfdata = false; +bool show_body = 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; +bool curl_global_initialized = false; +bool curl_easy_initialized = false; +struct curl_slist *header_list = NULL; +bool body_buf_initialized = false; +curlhelp_write_curlbuf body_buf; +bool header_buf_initialized = false; +curlhelp_write_curlbuf header_buf; +bool status_line_initialized = false; +curlhelp_statusline status_line; +bool put_buf_initialized = false; +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[MAX_INPUT_BUFFER]; +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; +bool display_html = false; +int onredirect = STATE_OK; +int followmethod = FOLLOW_HTTP_CURL; +int followsticky = STICKY_NONE; +bool use_ssl = false; +bool use_sni = true; +bool check_cert = false; +bool continue_after_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; +bool verify_peer_and_host = false; +bool is_openssl_callback = false; +#if defined(HAVE_SSL) && defined(USE_OPENSSL) +X509 *cert = NULL; +#endif /* defined(HAVE_SSL) && defined(USE_OPENSSL) */ +bool 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; +bool automatic_decompression = false; +char *cookie_jar_file = NULL; + +bool 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*); +size_t 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); +size_t curlhelp_buffer_read_callback(void *, size_t , size_t , void *); +void curlhelp_freereadbuffer (curlhelp_read_curlbuf *); +curlhelp_ssl_library curlhelp_get_ssl_library (); +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) == false) + usage4 (_("Could not parse arguments")); + + if (display_html) + printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">", + 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) +{ + (void) preverify_ok; + /* 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); +#if OPENSSL_VERSION_NUMBER >= 0x10100000L + X509_up_ref(cert); +#endif + if (verbose>=2) { + puts("* SSL verify callback with certificate:"); + X509_NAME *subject, *issuer; + printf("* issuer:\n"); + issuer = X509_get_issuer_name( cert ); + X509_NAME_print_ex_fp(stdout, issuer, 5, XN_FLAG_MULTILINE); + printf("* curl verify_callback:\n* subject:\n"); + subject = X509_get_subject_name( cert ); + X509_NAME_print_ex_fp(stdout, subject, 5, XN_FLAG_MULTILINE); + puts(""); + } + return 1; +} + +CURLcode sslctxfun(CURL *curl, SSL_CTX *sslctx, void *parm) +{ + (void) curl; // ignore unused parameter + (void) parm; // ignore unused parameter + SSL_CTX_set_verify(sslctx, SSL_VERIFY_PEER, verify_callback); + + return CURLE_OK; +} + +#endif /* USE_OPENSSL */ +#endif /* HAVE_SSL */ + +/* returns a string "HTTP/1.x" or "HTTP/2" */ +static char *string_statuscode (int major, int minor) +{ + static char buf[10]; + + switch (major) { + case 1: + snprintf (buf, sizeof (buf), "HTTP/%d.%d", major, minor); + break; + case 2: + case 3: + snprintf (buf, sizeof (buf), "HTTP/%d", major); + break; + default: + /* assuming here HTTP/N with N>=4 */ + snprintf (buf, sizeof (buf), "HTTP/%d", major); + break; + } + + return buf; +} + +/* 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 +lookup_host (const char *host, char *buf, size_t buflen) +{ + struct addrinfo hints, *res, *result; + char addrstr[100]; + size_t addrstr_len; + int errcode; + void *ptr; + size_t buflen_remaining = buflen - 1; + + memset (&hints, 0, sizeof (hints)); + hints.ai_family = address_family; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags |= AI_CANONNAME; + + errcode = getaddrinfo (host, NULL, &hints, &result); + if (errcode != 0) + return errcode; + + strcpy(buf, ""); + res = result; + + while (res) { + switch (res->ai_family) { + case AF_INET: + ptr = &((struct sockaddr_in *) res->ai_addr)->sin_addr; + break; + case AF_INET6: + ptr = &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr; + break; + } + + inet_ntop (res->ai_family, ptr, addrstr, 100); + if (verbose >= 1) { + printf ("* getaddrinfo IPv%d address: %s\n", + res->ai_family == PF_INET6 ? 6 : 4, addrstr); + } + + // Append all IPs to buf as a comma-separated string + addrstr_len = strlen(addrstr); + if (buflen_remaining > addrstr_len + 1) { + if (buf[0] != '\0') { + strncat(buf, ",", buflen_remaining); + buflen_remaining -= 1; + } + strncat(buf, addrstr, buflen_remaining); + buflen_remaining -= addrstr_len; + } + + res = res->ai_next; + } + + freeaddrinfo(result); + + return 0; +} + +static void +cleanup (void) +{ + if (status_line_initialized) curlhelp_free_statusline(&status_line); + status_line_initialized = false; + if (curl_easy_initialized) curl_easy_cleanup (curl); + curl_easy_initialized = false; + if (curl_global_initialized) curl_global_cleanup (); + curl_global_initialized = false; + if (body_buf_initialized) curlhelp_freewritebuffer (&body_buf); + body_buf_initialized = false; + if (header_buf_initialized) curlhelp_freewritebuffer (&header_buf); + header_buf_initialized = false; + if (put_buf_initialized) curlhelp_freereadbuffer (&put_buf); + put_buf_initialized = false; +} + +int +check_http (void) +{ + int result = STATE_OK; + int page_len = 0; + int i; + char *force_host_header = NULL; + struct curl_slist *host = NULL; + char addrstr[DEFAULT_BUFFER_SIZE/2]; + char dnscache[DEFAULT_BUFFER_SIZE]; + + /* initialize curl */ + if (curl_global_init (CURL_GLOBAL_DEFAULT) != CURLE_OK) + die (STATE_UNKNOWN, "HTTP UNKNOWN - curl_global_init failed\n"); + curl_global_initialized = true; + + if ((curl = curl_easy_init()) == NULL) { + die (STATE_UNKNOWN, "HTTP UNKNOWN - curl_easy_init failed\n"); + } + curl_easy_initialized = true; + + /* register cleanup function to shut down libcurl properly */ + atexit (cleanup); + + if (verbose >= 1) + handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_VERBOSE, 1), "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"); + + if (automatic_decompression) +#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 21, 6) + handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, ""), "CURLOPT_ACCEPT_ENCODING"); +#else + handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_ENCODING, ""), "CURLOPT_ENCODING"); +#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 21, 6) */ + + /* 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"); + body_buf_initialized = true; + 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" ); + header_buf_initialized = true; + 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"); + + // fill dns resolve cache to make curl connect to the given server_address instead of the host_name, only required for ssl, because we use the host_name later on to make SNI happy + if(use_ssl && host_name != NULL) { + if ( (res=lookup_host (server_address, addrstr, DEFAULT_BUFFER_SIZE/2)) != 0) { + snprintf (msg, + DEFAULT_BUFFER_SIZE, + _("Unable to lookup IP address for '%s': getaddrinfo returned %d - %s"), + server_address, + res, + gai_strerror (res)); + die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg); + } + snprintf (dnscache, DEFAULT_BUFFER_SIZE, "%s:%d:%s", host_name, server_port, addrstr); + host = curl_slist_append(NULL, dnscache); + curl_easy_setopt(curl, CURLOPT_RESOLVE, host); + if (verbose>=1) + printf ("* curl CURLOPT_RESOLVE: %s\n", dnscache); + } + + // If server_address is an IPv6 address it must be surround by square brackets + struct in6_addr tmp_in_addr; + if (inet_pton(AF_INET6, server_address, &tmp_in_addr) == 1) { + char *new_server_address = malloc(strlen(server_address) + 3); + if (new_server_address == NULL) { + die(STATE_UNKNOWN, "HTTP UNKNOWN - Unable to allocate memory\n"); + } + snprintf(new_server_address, strlen(server_address)+3, "[%s]", server_address); + free(server_address); + server_address = new_server_address; + } + + /* 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 != NULL ) ) ? 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 insecure 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) { + handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CAINFO, ca_cert), "CURLOPT_CAINFO"); + } + if (ca_cert || verify_peer_and_host) { + /* 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_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 (); + + /* 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, 85, 0) + handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_REDIR_PROTOCOLS_STR, "http,https"), "CURLOPT_REDIR_PROTOCOLS_STR"); +#elif 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 + + /* 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"); + if (curlhelp_initreadbuffer (&put_buf, http_post_data, strlen (http_post_data)) < 0) + die (STATE_UNKNOWN, "HTTP CRITICAL - out of memory allocating read buffer for PUT\n"); + put_buf_initialized = true; + 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"); + } + } + + /* cookie handling */ + if (cookie_jar_file != NULL) { + handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_COOKIEJAR, cookie_jar_file), "CURLOPT_COOKIEJAR"); + handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_COOKIEFILE, cookie_jar_file), "CURLOPT_COOKIEFILE"); + } + + /* 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; + if (host) { + curl_slist_free_all (host); host = 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, + errbuf[0] ? errbuf : curl_easy_strerror(res)); + die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg); + } + + /* certificate checks */ +#ifdef LIBCURL_FEATURE_SSL + if (use_ssl) { + if (check_cert) { + 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); + if (!continue_after_check_cert) { + 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); + if (!continue_after_check_cert) { + 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); + if (!continue_after_check_cert) { + 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 ? 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); + /* we cannot know the major/minor version here for sure as we cannot parse the first line */ + die (STATE_CRITICAL, "HTTP CRITICAL HTTP/x.x %ld unknown - %s", code, msg); + } + status_line_initialized = true; + + /* 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%s%s", msg, + show_body ? "\n" : "", + show_body ? body_buf.buf : ""); + } + + 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 encountered + */ + } + 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 %s %d %s - different HTTP codes (cUrl has %ld)\n"), + string_statuscode (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); + } + + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, + 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); + + strcpy(msg, tmp); + + 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); + } + + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, + 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); + + strcpy(msg, tmp); + + result = STATE_CRITICAL; + } + } + + if (strlen (regexp)) { + errcode = regexec (&preg, body_buf.buf, REGS, pmatch, 0); + if ((errcode == 0 && !invert_regex) || (errcode == REG_NOMATCH && invert_regex)) { + /* OK - No-op to avoid changing the logic around it */ + result = max_state_alt(STATE_OK, result); + } + else if ((errcode == REG_NOMATCH && !invert_regex) || (errcode == 0 && invert_regex)) { + if (!invert_regex) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%spattern not found, "), msg); + strcpy(msg, tmp); + + } else { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%spattern found, "), msg); + strcpy(msg, tmp); + + } + result = STATE_CRITICAL; + } else { + regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER); + + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sExecute Error: %s, "), msg, errbuf); + strcpy(msg, tmp); + result = STATE_UNKNOWN; + } + } + + /* make sure the page is of an appropriate size */ + if ((max_page_len > 0) && (page_len > max_page_len)) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%spage size %d too large, "), msg, page_len); + + strcpy(msg, tmp); + + result = max_state_alt(STATE_WARNING, result); + + } else if ((min_page_len > 0) && (page_len < min_page_len)) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%spage size %d too small, "), msg, page_len); + strcpy(msg, tmp); + 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 (strlen(msg) >= 2) { + 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: %s %d %s%s%s - %d bytes in %.3f second response time %s|%s\n%s%s", + state_text(result), string_statuscode (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 ? "</A>" : ""), + perfstring, + (show_body ? body_buf.buf : ""), + (show_body ? "\n" : "") ); + + 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-1, range.afterLast - range.first)); + buf[max (buflen-1, 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_major, &status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen, + headers, &nof_headers, 0); + + if (res == -1) { + die (STATE_UNKNOWN, _("HTTP UNKNOWN - Failed to parse Response\n")); + } + + 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 ? "</A>" : "")); + + 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 ? "</A>" : "")); + } 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)); + } + } + + if (!uri_strcmp (uri.scheme, "https")) + use_ssl = true; + else + use_ssl = false; + + /* 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 ? "</A>" : ""); + + /* 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-1); + } + } + + 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_CRITICAL, + _("HTTP CRITICAL - redirection creates an infinite loop - %s://%s:%d%s%s\n"), + use_ssl ? "https" : "http", new_host, new_port, new_url, (display_html ? "</A>" : "")); + + /* 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 + */ + + cleanup (); + 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); +} + +bool +process_arguments (int argc, char **argv) +{ + char *p; + int c = 1; + char *temp; + + enum { + INVERT_REGEX = CHAR_MAX + 1, + SNI_OPTION, + MAX_REDIRS_OPTION, + CONTINUE_AFTER_CHECK_CERT, + CA_CERT_OPTION, + HTTP_VERSION_OPTION, + AUTOMATIC_DECOMPRESSION, + COOKIE_JAR + }; + + 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}, + {"verify-cert", no_argument, 0, 'D'}, + {"continue-after-certificate", no_argument, 0, CONTINUE_AFTER_CHECK_CERT}, + {"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'}, + {"show-body", no_argument, 0, 'B'}, + {"max-redirs", required_argument, 0, MAX_REDIRS_OPTION}, + {"http-version", required_argument, 0, HTTP_VERSION_OPTION}, + {"enable-automatic-decompression", no_argument, 0, AUTOMATIC_DECOMPRESSION}, + {"cookie-jar", required_argument, 0, COOKIE_JAR}, + {0, 0, 0, 0} + }; + + if (argc < 2) + return false; + + /* 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:DnlLS::m:M:NEB", 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 CONTINUE_AFTER_CHECK_CERT: /* don't stop after the certificate is checked */ +#ifdef HAVE_SSL + continue_after_check_cert = true; + break; +#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 +#ifdef LIBCURL_FEATURE_SSL + case 'D': /* verify peer certificate & host */ + verify_peer_and_host = true; + break; +#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, 1.3 (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) + 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 MAX_REDIRS_OPTION: + if (!is_intnonneg (optarg)) + usage2 (_("Invalid max_redirs count"), optarg); + else { + max_depth = atoi (optarg); + } + break; + 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; + // fall through + 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 false; + } + break; + case INVERT_REGEX: + invert_regex = true; + 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 'B': /* print body content after status line */ + show_body = 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, "unknown http-version parameter: %s\n", optarg); + exit (STATE_WARNING); + } + break; + case AUTOMATIC_DECOMPRESSION: + automatic_decompression = true; + break; + case COOKIE_JAR: + cookie_jar_file = optarg; + 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) + 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 <nagios@nagios.org>\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, 1.3 = TLSv1.3). 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 by default. You can use")); + printf (" %s\n", _(" --continue-after-certificate to override this behavior)")); + printf (" %s\n", "--continue-after-certificate"); + printf (" %s\n", _("Allows the HTTP check to continue after performing the certificate check.")); + printf (" %s\n", _("Does nothing unless -C is used.")); + 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")); + printf (" %s\n", "-D, --verify-cert"); + printf (" %s\n", _("Verify the peer's SSL certificate and hostname")); +#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", "-B, --show-body"); + printf (" %s\n", _("Print body content below status line")); + printf (" %s\n", "-L, --link"); + printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)")); + printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow|sticky|stickyport|curl>"); + 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", "--max-redirs=INTEGER"); + printf (" %s", _("Maximal number of redirects (default: ")); + printf ("%d)\n", DEFAULT_MAX_REDIRS); + 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 (" %s\n", "--enable-automatic-decompression"); + printf (" %s\n", _("Enable automatic decompression of body (CURLOPT_ACCEPT_ENCODING).")); + printf (" %s\n", "---cookie-jar=FILE"); + printf (" %s\n", _("Store cookies in the cookie jar and send them out when requested.")); + 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 <proxy> -p <proxy-port> -u <check-url> -S(sl) -j CONNECT -H <webserver>")); + 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 <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname); + printf (" [-J <client certificate file>] [-K <private key>] [--ca-cert <CA certificate file>] [-D]\n"); + printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L] [-E] [-a auth]\n"); + printf (" [-b proxy_auth] [-f <ok|warning|critical|follow|sticky|stickyport|curl>]\n"); + printf (" [-e <expect>] [-d string] [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n"); + printf (" [-P string] [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>]\n"); + printf (" [-A string] [-k string] [-S <version>] [--sni]\n"); + printf (" [-T <content-type>] [-j method]\n"); + printf (" [--http-version=<version>] [--enable-automatic-decompression]\n"); + printf (" [--cookie-jar=<cookie jar file>\n"); + printf (" %s -H <vhost> | -I <IP-address> -C <warn_age>[,<crit_age>]\n",progname); + printf (" [-p <port>] [-t <timeout>] [-4|-6] [--sni]\n"); + printf ("\n"); +#ifdef LIBCURL_FEATURE_SSL + printf ("%s\n", _("In the first form, make an HTTP request.")); + printf ("%s\n\n", _("In the second form, connect to the server and check the TLS certificate.")); +#endif + 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; +} + +size_t 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) { + fprintf(stderr, "malloc failed (%d) %s\n", errno, strerror(errno)); + return -1; + } + } + + memcpy (buf->buf + buf->buflen, buffer, size * nmemb); + buf->buflen += size * nmemb; + buf->buf[buf->buflen] = '\0'; + + return (int)(size * nmemb); +} + +size_t 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 */ + strtok( p, "." ); + status_line->http_major = (int)strtol( p, &pp, 10 ); + if( *pp != '\0' ) { free( first_line_buf ); return -1; } + 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(headers[i].name != NULL && 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_major, &status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen, + headers, &nof_headers, 0); + + if (res == -1) { + die (STATE_UNKNOWN, _("HTTP UNKNOWN - Failed to parse Response\n")); + } + + server_date = get_header_value (headers, nof_headers, "date"); + document_date = get_header_value (headers, nof_headers, "last-modified"); + + if (!server_date || !*server_date) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sServer date unknown, "), *msg); + strcpy(*msg, tmp); + + date_result = max_state_alt(STATE_UNKNOWN, date_result); + + } else if (!document_date || !*document_date) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sDocument modification date unknown, "), *msg); + strcpy(*msg, tmp); + + 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) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sServer date \"%100s\" unparsable, "), *msg, server_date); + strcpy(*msg, tmp); + + date_result = max_state_alt(STATE_CRITICAL, date_result); + } else if (doc_data <= 0) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sDocument date \"%100s\" unparsable, "), *msg, document_date); + strcpy(*msg, tmp); + + date_result = max_state_alt(STATE_CRITICAL, date_result); + } else if (doc_data > srv_data + 30) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sDocument is %d seconds in the future, "), *msg, (int)doc_data - (int)srv_data); + strcpy(*msg, tmp); + + 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)) { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sLast modified %.1f days ago, "), *msg, ((float) n) / (60 * 60 * 24)); + strcpy(*msg, tmp); + + date_result = max_state_alt(STATE_CRITICAL, date_result); + } else { + char tmp[DEFAULT_BUFFER_SIZE]; + + snprintf (tmp, DEFAULT_BUFFER_SIZE, _("%sLast modified %d:%02d:%02d ago, "), *msg, n / (60 * 60), (n / 60) % 60, n % 60); + strcpy(*msg, tmp); + + 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) +{ + int content_length = 0; + 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_major, &status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen, + headers, &nof_headers, 0); + + if (res == -1) { + die (STATE_UNKNOWN, _("HTTP UNKNOWN - Failed to parse Response\n")); + } + + 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_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; + char *res; + + if (!s) return -1; + + /* Jan 17 14:25:12 2020 GMT */ + res = strptime (s, "%Y-%m-%d %H:%M:%S GMT", &tm); + /* Sep 11 12:00:00 2020 GMT */ + if (res == NULL) 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 + * TODO: have a decent parser here and not a hack + * multi-host certificate, check wildcards + */ + if (strncasecmp (slist->data, "Subject:", 8) == 0) { + int d = 3; + char* p = strstr (slist->data, "CN="); + if (p == NULL) { + d = 5; + p = strstr (slist->data, "CN = "); + } + if (p != NULL) { + if (strncmp (host_name, p+d, 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 */ |