Issue warning if libhtp version used is not up to date.

src/suricata.c

@@ -1102,6 +1102,11 @@ int main(int argc, char **argv)
     SCLogInfo("This is %s version %s", PROG_NAME, PROG_VER);
 #endif
 
+#ifndef HAVE_HTP_TX_GET_RESPONSE_HEADERS_RAW
+    SCLogWarning(SC_WARN_OUTDATED_LIBHTP, "libhtp < 0.2.7 detected. Keyword "
+        "http_raw_header will not be able to inspect response headers.");
+#endif
+
     SetBpfString(optind, argv);
 
     UtilCpuPrintSummary();

src/util-error.c

@@ -214,6 +214,7 @@ const char * SCErrorToString(SCError err)
         CASE_CODE (SC_ERR_RAWBYTES_FILE_DATA);
         CASE_CODE (SC_ERR_SOCKET);
         CASE_CODE (SC_ERR_PCAP_TRANSLATE);
+        CASE_CODE (SC_WARN_OUTDATED_LIBHTP);
 
         default:
             return "UNKNOWN_ERROR";

src/util-error.h

@@ -229,6 +229,7 @@ typedef enum {
     SC_ERR_RAWBYTES_FILE_DATA,
     SC_ERR_SOCKET,
     SC_ERR_PCAP_TRANSLATE,          /* failed to translate ip to dev */
+    SC_WARN_OUTDATED_LIBHTP,
 } SCError;
 
 const char *SCErrorToString(SCError);