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check_http.c
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/*****************************************************************************
*
* Nagios check_http plugin
*
* License: GPL
* Copyright (c) 1999-2008 Nagios Plugins Development Team
*
* Description:
*
* This file contains the check_http 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 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/>.
*
*
*****************************************************************************/
/* splint -I. -I../../plugins -I../../lib/ -I/usr/kerberos/include/ ../../plugins/check_http.c */
const char *progname = "check_http v2";
const char *copyright = "1999-2008";
const char *email = "[email protected]";
#include "common.h"
#include "netutils.h"
#include "utils.h"
#include "base64.h"
#include <ctype.h>
#define INPUT_DELIMITER ";"
#define STICKY_NONE 0
#define STICKY_HOST 1
#define STICKY_PORT 2
#define HTTP_EXPECT "HTTP/1."
enum {
MAX_IPV4_HOSTLENGTH = 255,
HTTP_PORT = 80,
HTTPS_PORT = 443,
MAX_PORT = 65535
};
#ifdef HAVE_SSL
int check_cert = FALSE;
int days_till_exp;
char *randbuff;
X509 *server_cert;
# define my_recv(buf, len) ((use_ssl) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
# define my_send(buf, len) ((use_ssl) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
#else /* ifndef HAVE_SSL */
# define my_recv(buf, len) read(sd, buf, len)
# define my_send(buf, len) send(sd, buf, len, 0)
#endif /* HAVE_SSL */
int no_body = FALSE;
int maximum_age = -1;
enum {
REGS = 2,
MAX_RE_SIZE = 256
};
#include "regex.h"
regex_t preg;
regmatch_t pmatch[REGS];
char regexp[MAX_RE_SIZE];
char errbuf[MAX_INPUT_BUFFER];
int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
int errcode;
int invert_regex = 0;
struct timeval tv;
#define HTTP_URL "/"
#define CRLF "\r\n"
int specify_port = FALSE;
int server_port = HTTP_PORT;
char server_port_text[6] = "";
char server_type[6] = "http";
char *server_address;
char *host_name;
char *server_url;
char *user_agent;
int server_url_length;
int server_expect_yn = 0;
char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
char string_expect[MAX_INPUT_BUFFER] = "";
double warning_time = 0;
int check_warning_time = FALSE;
double critical_time = 0;
int check_critical_time = FALSE;
char user_auth[MAX_INPUT_BUFFER] = "";
int display_html = FALSE;
char **http_opt_headers;
int http_opt_headers_count = 0;
int onredirect = STATE_OK;
int followsticky = STICKY_NONE;
int use_ssl = FALSE;
int verbose = FALSE;
int sd;
int min_page_len = 0;
int max_page_len = 0;
int redir_depth = 0;
int max_depth = 15;
char *http_method;
char *http_post_data;
char *http_content_type;
char buffer[MAX_INPUT_BUFFER];
int process_arguments (int, char **);
int check_http (void);
void redir (char *pos, char *status_line);
int server_type_check(const char *type);
int server_port_check(int ssl_flag);
char *perfd_time (double microsec);
char *perfd_size (int page_len);
void print_help (void);
void print_usage (void);
int
main (int argc, char **argv)
{
int result = STATE_UNKNOWN;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* Set default URL. Must be malloced for subsequent realloc if --onredirect=follow */
server_url = strdup(HTTP_URL);
server_url_length = strlen(server_url);
asprintf (&user_agent, "User-Agent: check_http/v%s (nagios-plugins %s)",
NP_VERSION, VERSION);
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
if (display_html == TRUE)
printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">",
use_ssl ? "https" : "http", host_name ? host_name : server_address,
server_port, server_url);
/* initialize alarm signal handling, set socket timeout, start timer */
(void) signal (SIGALRM, socket_timeout_alarm_handler);
(void) alarm (socket_timeout);
gettimeofday (&tv, NULL);
result = check_http ();
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c = 1;
char *p;
enum {
INVERT_REGEX = CHAR_MAX + 1
};
int option = 0;
static struct option longopts[] = {
STD_LONG_OPTS,
{"link", no_argument, 0, 'L'},
{"nohtml", no_argument, 0, 'n'},
{"ssl", no_argument, 0, 'S'},
{"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'},
{"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'},
{"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'},
{0, 0, 0, 0}
};
if (argc < 2)
return ERROR;
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");
}
while (1) {
c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:j:T:I:a:e:p:s:R:r:u:f:C:nlLSm:M:N", longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case '?': /* usage */
usage5 ();
break;
case 'h': /* help */
print_help ();
exit (STATE_OK);
break;
case 'V': /* version */
print_revision (progname, NP_VERSION);
exit (STATE_OK);
break;
case 't': /* timeout period */
if (!is_intnonneg (optarg))
usage2 (_("Timeout interval must be a positive integer"), optarg);
else
socket_timeout = atoi (optarg);
break;
case 'c': /* critical time threshold */
if (!is_nonnegative (optarg))
usage2 (_("Critical threshold must be integer"), optarg);
else {
critical_time = strtod (optarg, NULL);
check_critical_time = TRUE;
}
break;
case 'w': /* warning time threshold */
if (!is_nonnegative (optarg))
usage2 (_("Warning threshold must be integer"), optarg);
else {
warning_time = strtod (optarg, NULL);
check_warning_time = TRUE;
}
break;
case 'A': /* User Agent String */
asprintf (&user_agent, "User-Agent: %s", optarg);
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;
/* asprintf (&http_opt_headers, "%s", 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 HAVE_SSL
if (!is_intnonneg (optarg))
usage2 (_("Invalid certificate expiration period"), optarg);
else {
days_till_exp = atoi (optarg);
check_cert = TRUE;
}
/* Fall through to -S option */
#endif
case 'S': /* use SSL */
#ifndef HAVE_SSL
usage4 (_("Invalid option - SSL is not available"));
#endif
use_ssl = TRUE;
if (specify_port == FALSE)
server_port = HTTPS_PORT;
break;
case 'f': /* onredirect */
if (!strcmp (optarg, "stickyport"))
onredirect = STATE_DEPENDENT, followsticky = STICKY_HOST|STICKY_PORT;
else if (!strcmp (optarg, "sticky"))
onredirect = STATE_DEPENDENT, followsticky = STICKY_HOST;
else if (!strcmp (optarg, "follow"))
onredirect = STATE_DEPENDENT, followsticky = STICKY_NONE;
else if (!strcmp (optarg, "unknown"))
onredirect = STATE_UNKNOWN;
else if (!strcmp (optarg, "ok"))
onredirect = STATE_OK;
else if (!strcmp (optarg, "warning"))
onredirect = STATE_WARNING;
else if (!strcmp (optarg, "critical"))
onredirect = STATE_CRITICAL;
else usage2 (_("Invalid onredirect option"), optarg);
if (verbose)
printf(_("option f:%d \n"), onredirect);
break;
/* Note: H, I, and u must be malloc'd or will fail on redirects */
case 'H': /* Host Name (virtual host) */
host_name = strdup (optarg);
if (host_name[0] == '[') {
if ((p = strstr (host_name, "]:")) != NULL) /* [IPv6]:port */
server_port = atoi (p + 2);
} else if ((p = strchr (host_name, ':')) != NULL
&& strchr (++p, ':') == NULL) /* IPv4:port or host:port */
server_port = atoi (p);
break;
case 'I': /* Server IP-address */
server_address = strdup (optarg);
break;
case 'u': /* URL path */
server_url = strdup (optarg);
server_url_length = strlen (server_url);
break;
case 'p': /* Server port */
if (!is_intnonneg (optarg))
usage2 (_("Invalid port number"), optarg);
else {
server_port = atoi (optarg);
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 '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 '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 */
asprintf (&http_content_type, "%s", optarg);
break;
case 'l': /* linespan */
cflags &= ~REG_NEWLINE;
break;
case 'R': /* regex */
cflags |= REG_ICASE;
case 'r': /* regex */
strncpy (regexp, optarg, MAX_RE_SIZE - 1);
regexp[MAX_RE_SIZE - 1] = 0;
errcode = regcomp (&preg, regexp, cflags);
if (errcode != 0) {
(void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
printf (_("Could Not Compile Regular Expression: %s"), errbuf);
return ERROR;
}
break;
case INVERT_REGEX:
invert_regex = 1;
break;
case '4':
address_family = AF_INET;
break;
case '6':
#ifdef USE_IPV6
address_family = AF_INET6;
#else
usage4 (_("IPv6 support not available"));
#endif
break;
case 'v': /* verbose */
verbose = TRUE;
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);
}
}
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);
}
if (check_critical_time && critical_time>(double)socket_timeout)
socket_timeout = (int)critical_time + 1;
if (http_method == NULL)
http_method = strdup ("GET");
return TRUE;
}
/* Returns 1 if we're done processing the document body; 0 to keep going */
static int
document_headers_done (char *full_page)
{
const char *body;
for (body = full_page; *body; body++) {
if (!strncmp (body, "\n\n", 2) || !strncmp (body, "\n\r\n", 3))
break;
}
if (!*body)
return 0; /* haven't read end of headers yet */
full_page[body - full_page] = 0;
return 1;
}
static time_t
parse_time_string (const char *string)
{
struct tm tm;
time_t t;
memset (&tm, 0, sizeof(tm));
/* Like this: Tue, 25 Dec 2001 02:59:03 GMT */
if (isupper (string[0]) && /* Tue */
islower (string[1]) &&
islower (string[2]) &&
',' == string[3] &&
' ' == string[4] &&
(isdigit(string[5]) || string[5] == ' ') && /* 25 */
isdigit (string[6]) &&
' ' == string[7] &&
isupper (string[8]) && /* Dec */
islower (string[9]) &&
islower (string[10]) &&
' ' == string[11] &&
isdigit (string[12]) && /* 2001 */
isdigit (string[13]) &&
isdigit (string[14]) &&
isdigit (string[15]) &&
' ' == string[16] &&
isdigit (string[17]) && /* 02: */
isdigit (string[18]) &&
':' == string[19] &&
isdigit (string[20]) && /* 59: */
isdigit (string[21]) &&
':' == string[22] &&
isdigit (string[23]) && /* 03 */
isdigit (string[24]) &&
' ' == string[25] &&
'G' == string[26] && /* GMT */
'M' == string[27] && /* GMT */
'T' == string[28]) {
tm.tm_sec = 10 * (string[23]-'0') + (string[24]-'0');
tm.tm_min = 10 * (string[20]-'0') + (string[21]-'0');
tm.tm_hour = 10 * (string[17]-'0') + (string[18]-'0');
tm.tm_mday = 10 * (string[5] == ' ' ? 0 : string[5]-'0') + (string[6]-'0');
tm.tm_mon = (!strncmp (string+8, "Jan", 3) ? 0 :
!strncmp (string+8, "Feb", 3) ? 1 :
!strncmp (string+8, "Mar", 3) ? 2 :
!strncmp (string+8, "Apr", 3) ? 3 :
!strncmp (string+8, "May", 3) ? 4 :
!strncmp (string+8, "Jun", 3) ? 5 :
!strncmp (string+8, "Jul", 3) ? 6 :
!strncmp (string+8, "Aug", 3) ? 7 :
!strncmp (string+8, "Sep", 3) ? 8 :
!strncmp (string+8, "Oct", 3) ? 9 :
!strncmp (string+8, "Nov", 3) ? 10 :
!strncmp (string+8, "Dec", 3) ? 11 :
-1);
tm.tm_year = ((1000 * (string[12]-'0') +
100 * (string[13]-'0') +
10 * (string[14]-'0') +
(string[15]-'0'))
- 1900);
tm.tm_isdst = 0; /* GMT is never in DST, right? */
if (tm.tm_mon < 0 || tm.tm_mday < 1 || tm.tm_mday > 31)
return 0;
/*
This is actually wrong: we need to subtract the local timezone
offset from GMT from this value. But, that's ok in this usage,
because we only comparing these two GMT dates against each other,
so it doesn't matter what time zone we parse them in.
*/
t = mktime (&tm);
if (t == (time_t) -1) t = 0;
if (verbose) {
const char *s = string;
while (*s && *s != '\r' && *s != '\n')
fputc (*s++, stdout);
printf (" ==> %lu\n", (unsigned long) t);
}
return t;
} else {
return 0;
}
}
/* 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;
}
static int
check_document_dates (const char *headers, char **msg)
{
const char *s;
char *server_date = 0;
char *document_date = 0;
int date_result = STATE_OK;
s = headers;
while (*s) {
const char *field = s;
const char *value = 0;
/* Find the end of the header field */
while (*s && !isspace(*s) && *s != ':')
s++;
/* Remember the header value, if any. */
if (*s == ':')
value = ++s;
/* Skip to the end of the header, including continuation lines. */
while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
s++;
/* Avoid stepping over end-of-string marker */
if (*s)
s++;
/* Process this header. */
if (value && value > field+2) {
char *ff = (char *) malloc (value-field);
char *ss = ff;
while (field < value-1)
*ss++ = tolower(*field++);
*ss++ = 0;
if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
const char *e;
while (*value && isspace (*value))
value++;
for (e = value; *e && *e != '\r' && *e != '\n'; e++)
;
ss = (char *) malloc (e - value + 1);
strncpy (ss, value, e - value);
ss[e - value] = 0;
if (!strcmp (ff, "date")) {
if (server_date) free (server_date);
server_date = ss;
} else {
if (document_date) free (document_date);
document_date = ss;
}
}
free (ff);
}
}
/* Done parsing the body. Now check the dates we (hopefully) parsed. */
if (!server_date || !*server_date) {
asprintf (msg, _("%sServer date unknown, "), *msg);
date_result = max_state_alt(STATE_UNKNOWN, date_result);
} else if (!document_date || !*document_date) {
asprintf (msg, _("%sDocument modification date unknown, "), *msg);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else {
time_t srv_data = parse_time_string (server_date);
time_t doc_data = parse_time_string (document_date);
if (srv_data <= 0) {
asprintf (msg, _("%sServer date \"%100s\" unparsable, "), *msg, server_date);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else if (doc_data <= 0) {
asprintf (msg, _("%sDocument date \"%100s\" unparsable, "), *msg, document_date);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else if (doc_data > srv_data + 30) {
asprintf (msg, _("%sDocument is %d seconds in the future, "), *msg, (int)doc_data - (int)srv_data);
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else if (doc_data < srv_data - maximum_age) {
int n = (srv_data - doc_data);
if (n > (60 * 60 * 24 * 2)) {
asprintf (msg, _("%sLast modified %.1f days ago, "), *msg, ((float) n) / (60 * 60 * 24));
date_result = max_state_alt(STATE_CRITICAL, date_result);
} else {
asprintf (msg, _("%sLast modified %d:%02d:%02d ago, "), *msg, n / (60 * 60), (n / 60) % 60, n % 60);
date_result = max_state_alt(STATE_CRITICAL, date_result);
}
}
free (server_date);
free (document_date);
}
return date_result;
}
int
get_content_length (const char *headers)
{
const char *s;
int content_length = 0;
s = headers;
while (*s) {
const char *field = s;
const char *value = 0;
/* Find the end of the header field */
while (*s && !isspace(*s) && *s != ':')
s++;
/* Remember the header value, if any. */
if (*s == ':')
value = ++s;
/* Skip to the end of the header, including continuation lines. */
while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
s++;
s++;
/* Process this header. */
if (value && value > field+2) {
char *ff = (char *) malloc (value-field);
char *ss = ff;
while (field < value-1)
*ss++ = tolower(*field++);
*ss++ = 0;
if (!strcmp (ff, "content-length")) {
const char *e;
while (*value && isspace (*value))
value++;
for (e = value; *e && *e != '\r' && *e != '\n'; e++)
;
ss = (char *) malloc (e - value + 1);
strncpy (ss, value, e - value);
ss[e - value] = 0;
content_length = atoi(ss);
free (ss);
}
free (ff);
}
}
return (content_length);
}
char *
prepend_slash (char *path)
{
char *newpath;
if (path[0] == '/')
return path;
if ((newpath = malloc (strlen(path) + 2)) == NULL)
die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
newpath[0] = '/';
strcpy (newpath + 1, path);
free (path);
return newpath;
}
int
check_http (void)
{
char *msg;
char *status_line;
char *status_code;
char *header;
char *page;
char *auth;
int http_status;
int i = 0;
size_t pagesize = 0;
char *full_page;
char *buf;
char *pos;
long microsec;
double elapsed_time;
int page_len = 0;
int result = STATE_OK;
/* try to connect to the host at the given port number */
if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
/* if we are called with the -I option, the -j method is CONNECT and */
/* we received -S for SSL, then we tunnel the request through a proxy*/
/* @20100414, public[at]frank4dd.com, http://nagios.fm4dd.com/howto */
if ( server_address != NULL && strcmp(http_method, "CONNECT") == 0
&& host_name != NULL && use_ssl == TRUE) {
if (verbose) printf ("Entering CONNECT tunnel mode with proxy %s:%d to dst %s:%d\n", server_address, server_port, host_name, HTTPS_PORT);
asprintf (&buf, "%s %s:%d HTTP/1.1\r\n%s\r\n", http_method, host_name, HTTPS_PORT, user_agent);
asprintf (&buf, "%sProxy-Connection: keep-alive\r\n", buf);
asprintf (&buf, "%sHost: %s\r\n", buf, host_name);
/* we finished our request, send empty line with CRLF */
asprintf (&buf, "%s%s", buf, CRLF);
if (verbose) printf ("%s\n", buf);
send(sd, buf, strlen (buf), 0);
buf[0]='\0';
if (verbose) printf ("Receive response from proxy\n");
read (sd, buffer, MAX_INPUT_BUFFER-1);
if (verbose) printf ("%s", buffer);
/* Here we should check if we got HTTP/1.1 200 Connection established */
}
#ifdef HAVE_SSL
if (use_ssl == TRUE) {
np_net_ssl_init_with_hostname(sd, host_name);
if (verbose) printf ("SSL initialized\n");
if (check_cert == TRUE) {
result = np_net_ssl_check_cert(days_till_exp);
np_net_ssl_cleanup();
if (sd) close(sd);
return result;
}
}
#endif /* HAVE_SSL */
if ( server_address != NULL && strcmp(http_method, "CONNECT") == 0
&& host_name != NULL && use_ssl == TRUE)
asprintf (&buf, "%s %s %s\r\n%s\r\n", "GET", server_url, host_name ? "HTTP/1.1" : "HTTP/1.0", user_agent);
else
asprintf (&buf, "%s %s %s\r\n%s\r\n", http_method, server_url, host_name ? "HTTP/1.1" : "HTTP/1.0", user_agent);
/* tell HTTP/1.1 servers not to keep the connection alive */
asprintf (&buf, "%sConnection: close\r\n", buf);
/* optionally send the host header info */
if (host_name) {
/*
* Specify the port only if we're using a non-default port (see RFC 2616,
* 14.23). Some server applications/configurations cause trouble if the
* (default) port is explicitly specified in the "Host:" header line.
*/
if ((use_ssl == FALSE && server_port == HTTP_PORT) ||
(use_ssl == TRUE && server_port == HTTPS_PORT) ||
( server_address != NULL && strcmp(http_method, "CONNECT") == 0
&& host_name != NULL && use_ssl == TRUE))
asprintf (&buf, "%sHost: %s\r\n", buf, host_name);
else
asprintf (&buf, "%sHost: %s:%d\r\n", buf, host_name, server_port);
}
/* optionally send any other header tag */
if (http_opt_headers_count) {
for (i = 0; i < http_opt_headers_count ; i++) {
for ((pos = strtok(http_opt_headers[i], INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
asprintf (&buf, "%s%s\r\n", buf, pos);
}
/* 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); */
}
/* optionally send the authentication info */
if (strlen(user_auth)) {
base64_encode_alloc (user_auth, strlen (user_auth), &auth);
asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
}
/* either send http POST data (any data, not only POST)*/
if (http_post_data) {
if (http_content_type) {
asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
} else {
asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
}
asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
}
else {
/* or just a newline so the server knows we're done with the request */
asprintf (&buf, "%s%s", buf, CRLF);
}
if (verbose) printf ("%s\n", buf);
my_send (buf, strlen (buf));
/* fetch the page */
full_page = strdup("");
while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
buffer[i] = '\0';
asprintf (&full_page, "%s%s", full_page, buffer);
pagesize += i;
if (no_body && document_headers_done (full_page)) {
i = 0;
break;
}
}
if (i < 0 && errno != ECONNRESET) {
#ifdef HAVE_SSL
/*
if (use_ssl) {
sslerr=SSL_get_error(ssl, i);
if ( sslerr == SSL_ERROR_SSL ) {
die (STATE_WARNING, _("HTTP WARNING - Client Certificate Required\n"));
} else {
die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
}
}
else {
*/
#endif
die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
#ifdef HAVE_SSL
/* XXX
}
*/
#endif
}
/* return a CRITICAL status if we couldn't read any data */
if (pagesize == (size_t) 0)
die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
/* close the connection */
#ifdef HAVE_SSL
np_net_ssl_cleanup();
#endif
if (sd) close(sd);
/* Save check time */
microsec = deltime (tv);
elapsed_time = (double)microsec / 1.0e6;
/* leave full_page untouched so we can free it later */
page = full_page;
if (verbose)
printf ("%s://%s:%d%s is %d characters\n",
use_ssl ? "https" : "http", server_address,
server_port, server_url, (int)pagesize);
/* find status line and null-terminate it */
status_line = page;
page += (size_t) strcspn (page, "\r\n");
pos = page;
page += (size_t) strspn (page, "\r\n");
status_line[strcspn(status_line, "\r\n")] = 0;
strip (status_line);
if (verbose)
printf ("STATUS: %s\n", status_line);
/* find header info and null-terminate it */
header = page;
while (strcspn (page, "\r\n") > 0) {
page += (size_t) strcspn (page, "\r\n");
pos = page;
if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
(strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
page += (size_t) 2;
else
page += (size_t) 1;
}
page += (size_t) strspn (page, "\r\n");
header[pos - header] = 0;
if (verbose)
printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
(no_body ? " [[ skipped ]]" : page));
/* make sure the status line matches the response we are looking for */
if (!expected_statuscode (status_line, server_expect)) {
if (server_port == HTTP_PORT)
asprintf (&msg,
_("Invalid HTTP response received from host: %s\n"),
status_line);
else
asprintf (&msg,
_("Invalid HTTP response received from host on port %d: %s\n"),
server_port, status_line);
die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
}
/* Bypass normal status line check if server_expect was set by user and not default */
/* NOTE: After this if/else block msg *MUST* be an asprintf-allocated string */
if ( server_expect_yn ) {
asprintf (&msg,
_("Status line output matched \"%s\" - "), server_expect);
if (verbose)
printf ("%s\n",msg);
}
else {
/* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
/* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
/* Status-Code = 3 DIGITS */
status_code = strchr (status_line, ' ') + sizeof (char);
if (strspn (status_code, "1234567890") != 3)
die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);