1 files changed, 40 insertions, 19 deletions

diff --git a/plugins/check_curl.c b/plugins/check_curl.c
index c37d45d..be5740d 100644
--- a/plugins/check_curl.c
+++ b/plugins/check_curl.c
@@ -55,6 +55,7 @@ const char *email = "devel@monitoring-plugins.org";
 #include "uriparser/Uri.h"
 
 #include <arpa/inet.h>
+#include <netinet/in.h>
 
 #if defined(HAVE_SSL) && defined(USE_OPENSSL)
 #include <openssl/opensslv.h>
@@ -384,8 +385,11 @@ 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;
@@ -395,26 +399,40 @@ lookup_host (const char *host, char *buf, size_t buflen)
   errcode = getaddrinfo (host, NULL, &hints, &result);
   if (errcode != 0)
     return errcode;
-  
+
+  strcpy(buf, "");
   res = result;
 
   while (res) {
-  inet_ntop (res->ai_family, res->ai_addr->sa_data, buf, buflen);
-  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;
+    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, buf, buflen);
-    if (verbose >= 1)
+
+    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, buf);
+        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;
@@ -445,7 +463,7 @@ check_http (void)
   int i;
   char *force_host_header = NULL;
   struct curl_slist *host = NULL;
-  char addrstr[100];
+  char addrstr[DEFAULT_BUFFER_SIZE/2];
   char dnscache[DEFAULT_BUFFER_SIZE];
 
   /* initialize curl */
@@ -497,7 +515,7 @@ check_http (void)
 
   // 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, 100)) != 0) {
+      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);
@@ -524,7 +542,7 @@ check_http (void)
   /* 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,
+      ( use_ssl & ( host_name != NULL ) ) ? host_name : server_address,
       server_port,
       server_url
   );
@@ -600,7 +618,7 @@ check_http (void)
 
 #ifdef LIBCURL_FEATURE_SSL
 
-  /* set SSL version, warn about unsecure or unsupported versions */
+  /* 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");
   }
@@ -792,6 +810,9 @@ check_http (void)
   /* 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) {
@@ -965,7 +986,7 @@ GOT_FIRST_CERT:
         }
       } else {
         /* this is a specific code in the command line to
-         * be returned when a redirection is encoutered
+         * be returned when a redirection is encountered
          */
       }
       result = max_state_alt (onredirect, result);
@@ -2030,7 +2051,7 @@ print_usage (void)
   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|critcal|follow|sticky|stickyport|curl>]\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");