Provide a function to set 'hostname' field in log

headers/modsecurity/rule_message.h

@@ -67,6 +67,7 @@ class RuleMessage {
         m_ruleLine(rule->getLineNumber()),
         m_saveMessage(true),
         m_serverIpAddress(trans->m_serverIpAddress),
+        m_requestHostName(trans->m_requestHostName),
         m_severity(0),
         m_uriNoQueryStringDecoded(trans->m_uri_no_query_string_decoded),
         m_ver(rule->m_ver),
@@ -92,6 +93,7 @@ class RuleMessage {
         m_ruleLine(rule->m_ruleLine),
         m_saveMessage(rule->m_saveMessage),
         m_serverIpAddress(rule->m_serverIpAddress),
+        m_requestHostName(rule->m_requestHostName),
         m_severity(rule->m_severity),
         m_uriNoQueryStringDecoded(rule->m_uriNoQueryStringDecoded),
         m_ver(rule->m_ver),
@@ -117,6 +119,7 @@ class RuleMessage {
         m_ruleLine(ruleMessage.m_ruleLine),
         m_saveMessage(ruleMessage.m_saveMessage),
         m_serverIpAddress(ruleMessage.m_serverIpAddress),
+        m_requestHostName(ruleMessage.m_requestHostName),
         m_severity(ruleMessage.m_severity),
         m_uriNoQueryStringDecoded(ruleMessage.m_uriNoQueryStringDecoded),
         m_ver(ruleMessage.m_ver),
@@ -142,6 +145,7 @@ class RuleMessage {
         m_ruleLine = ruleMessage.m_ruleLine;
         m_saveMessage = ruleMessage.m_saveMessage;
         m_serverIpAddress = ruleMessage.m_serverIpAddress;
+        m_requestHostName = ruleMessage.m_requestHostName;
         m_severity = ruleMessage.m_severity;
         m_uriNoQueryStringDecoded = ruleMessage.m_uriNoQueryStringDecoded;
         m_ver = ruleMessage.m_ver;
@@ -201,6 +205,7 @@ class RuleMessage {
     int m_ruleLine;
     bool m_saveMessage;
     std::shared_ptr<std::string> m_serverIpAddress;
+    std::shared_ptr<std::string> m_requestHostName;
     int m_severity;
     std::shared_ptr<std::string> m_uriNoQueryStringDecoded;
     std::string m_ver;

headers/modsecurity/transaction.h

@@ -393,6 +393,8 @@ class Transaction : public TransactionAnchoredVariables, public TransactionSecMa
     int processLogging();
     int updateStatusCode(int status);
 
+    int setRequestHostName(const std::string& hostname);
+
     bool intervention(ModSecurityIntervention *it);
 
     bool addArgument(const std::string& orig, const std::string& key,
@@ -443,6 +445,11 @@ class Transaction : public TransactionAnchoredVariables, public TransactionSecMa
      */
     std::shared_ptr<std::string> m_serverIpAddress;
 
+    /**
+     * Holds the request's hostname
+     */
+    std::shared_ptr<std::string> m_requestHostName;
+
     /**
      * Holds the raw URI that was requested.
      */
@@ -724,6 +731,9 @@ int msc_process_logging(Transaction *transaction);
 /** @ingroup ModSecurity_C_API */
 int msc_update_status_code(Transaction *transaction, int status);
 
+/** @ingroup ModSecurity_C_API */
+int msc_set_request_hostname(Transaction *transaction, const unsigned char *hostname);
+
 #ifdef __cplusplus
 }
 }  // namespace modsecurity

src/rule_message.cc

@@ -42,8 +42,8 @@ std::string RuleMessage::_details(const RuleMessage *rm) {
         msg.append(" [tag \"" + utils::string::toHexIfNeeded(a, true) + "\"]");
     }
 
-    msg.append(" [hostname \"" + *rm->m_serverIpAddress.get() \
-        + "\"]");
+    msg.append(" [hostname \"" + *rm->m_requestHostName.get() + "\"]");
+
     msg.append(" [uri \"" + utils::string::limitTo(200, *rm->m_uriNoQueryStringDecoded.get()) + "\"]");
     msg.append(" [unique_id \"" + *rm->m_id + "\"]");
     msg.append(" [ref \"" + utils::string::limitTo(200, rm->m_reference) + "\"]");

src/transaction.cc

@@ -107,6 +107,7 @@ Transaction::Transaction(ModSecurity *ms, RulesSet *rules, void *logCbData)
      m_clientIpAddress(std::make_shared<std::string>("")),
     m_httpVersion(""),
     m_serverIpAddress(std::make_shared<std::string>("")),
+    m_requestHostName(std::make_shared<std::string>("")),
     m_uri(""),
     m_uri_no_query_string_decoded(std::make_shared<std::string>("")),
     m_ARGScombinedSizeDouble(0),
@@ -183,6 +184,7 @@ Transaction::Transaction(ModSecurity *ms, RulesSet *rules, char *id, void *logCb
     m_clientIpAddress(std::make_shared<std::string>("")),
     m_httpVersion(""),
     m_serverIpAddress(std::make_shared<std::string>("")),
+    m_requestHostName(std::make_shared<std::string>("")),
     m_uri(""),
     m_uri_no_query_string_decoded(std::make_shared<std::string>("")),
     m_ARGScombinedSizeDouble(0),
@@ -319,6 +321,7 @@ int Transaction::processConnection(const char *client, int cPort,
     const char *server, int sPort) {
     m_clientIpAddress = std::unique_ptr<std::string>(new std::string(client));
     m_serverIpAddress = std::unique_ptr<std::string>(new std::string(server));
+    m_requestHostName = std::unique_ptr<std::string>(new std::string(server));
     this->m_clientPort = cPort;
     this->m_serverPort = sPort;
     ms_dbg(4, "Transaction context created.");
@@ -2358,5 +2361,52 @@ extern "C" int msc_update_status_code(Transaction *transaction, int status) {
 }
 
 
+/**
+ * @name    setRequestHostName
+ * @brief   Set request's host name
+ *
+ * With this method it is possible to set the request's hostname.
+ *
+ * @note This function expects a NULL terminated string.
+ *
+ * @param hostname hostname.
+ *
+ * @returns If the operation was successful or not.
+ * @retval true Operation was successful.
+ * @retval false Operation failed.
+ *
+ */
+int Transaction::setRequestHostName(const std::string& hostname) {
+
+    if (hostname != "") {
+        m_requestHostName = std::unique_ptr<std::string>(new std::string(hostname));
+    }
+
+    return true;
+}
+
+
+/**
+ * @name    msc_set_request_hostname
+ * @brief   Set request's host name
+ *
+ * With this method it is possible to set request's hostname.
+ *
+ * @note This function expects a NULL terminated string.
+ *
+ * @param transaction ModSecurity transaction.
+ * @param hostname hostname.
+ *
+ * @returns If the operation was successful or not.
+ * @retval 1 Operation was successful.
+ * @retval 0 Operation failed.
+ *
+ */
+extern "C" int msc_set_request_hostname(Transaction *transaction,
+    const unsigned char *hostname) {
+    return transaction->setRequestHostName(reinterpret_cast<const char *>(hostname));
+}
+
+
 }  // namespace modsecurity
 

test/regression/regression.cc

@@ -309,6 +309,10 @@ void perform_unit_test(ModSecurityTest<RegressionTest> *test,
         modsec_transaction->processConnection(t->clientIp.c_str(),
             t->clientPort, t->serverIp.c_str(), t->serverPort);
 
+        if (t->hostname != "") {
+            modsec_transaction->setRequestHostName(t->hostname);
+        }
+
         actions(&r, modsec_transaction, &serverLog);
 #if 0
         if (r.status != 200) {

test/regression/regression_test.cc

@@ -134,6 +134,9 @@ RegressionTest *RegressionTest::from_yajl_node(const yajl_val &node) {
                 if (strcmp(key2, "port") == 0) {
                     u->serverPort = YAJL_GET_INTEGER(val2);
                 }
+                if (strcmp(key2, "hostname") == 0) {
+                    u->hostname = YAJL_GET_STRING(val2);
+                }
             }
         }
         if (strcmp(key, "request") == 0) {

test/regression/regression_test.h

@@ -61,6 +61,7 @@ class RegressionTest {
     std::string serverIp;
     int clientPort;
     int serverPort;
+    std::string hostname;
 
     std::string method;
     std::string httpVersion;

test/test-cases/regression/fn-setHostname.json

@@ -0,0 +1,41 @@
+[
+  {
+    "enabled":1,
+    "version_min":300000,
+    "title":"Testing function :: setRequestHostName",
+    "client": {
+      "ip":"200.249.12.31"
+    },
+    "server":{
+      "ip":"200.249.12.31",
+      "port":80,
+      "hostname":"modsecurity.org"
+    },
+    "request": {
+      "headers": {
+        "Host":"www.modsecurity.org"
+      },
+      "uri":"/foo?q=attack",
+      "http_version": 1.1
+    },
+    "response":{
+      "headers":{
+        "Date":"Mon, 13 Jul 2015 20:02:41 GMT",
+        "Last-Modified":"Sun, 26 Oct 2014 22:33:37 GMT",
+        "Content-Type":"text/plain"
+      },
+      "body":[
+        "denystring"
+      ]
+    },
+    "expected":{
+      "http_code": 200,
+      "debug_log": "[hostname: \"modsecurity.org\"]"
+    },
+    "rules":[
+      "SecRuleEngine On",
+      "SecResponseBodyAccess On",
+      "SecRule ARGS_GET \"@contains attack\" \"id:1,phase:2,deny\""
+    ]
+  }
+]