Initial adding of netfilter_queue capturer.

[stg.git] / projects / stargazer / plugins / capture / divert_freebsd / divert_cap.cpp

diff --git a/projects/stargazer/plugins/capture/divert_freebsd/divert_cap.cpp b/projects/stargazer/plugins/capture/divert_freebsd/divert_cap.cpp
index 603c520994bf11fa8075f4f36a0ab41ffa7d4343..96476d4e204027ee8f1d556f7dc54544a52489d8 100644 (file)
--- a/projects/stargazer/plugins/capture/divert_freebsd/divert_cap.cpp
+++ b/projects/stargazer/plugins/capture/divert_freebsd/divert_cap.cpp
@@ -45,7 +45,7 @@ $Date: 2010/09/10 06:43:03 $
 
 #include "stg/common.h"
 #include "stg/traffcounter.h"
-#include "sg/plugin_creator.h"
+#include "stg/plugin_creator.h"
 #include "divert_cap.h"
 
 #define BUFF_LEN (16384) /* max mtu -> lo=16436  TODO why?*/
@@ -54,7 +54,6 @@ $Date: 2010/09/10 06:43:03 $
 struct DIVERT_DATA {
 int sock;
 short int port;
-unsigned char buffer[BUFF_LEN];
 char iface[10];
 };
 //-----------------------------------------------------------------------------
@@ -63,7 +62,12 @@ DIVERT_DATA cddiv;  //capture data
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
+namespace
+{
 PLUGIN_CREATOR<DIVERT_CAP> dcc;
+}
+
+extern "C" PLUGIN * GetPlugin();
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
@@ -74,16 +78,21 @@ return dcc.GetPlugin();
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
-const std::string DIVERT_CAP::GetVersion() const
+std::string DIVERT_CAP::GetVersion() const
 {
 return "Divert_cap v.1.0";
 }
 //-----------------------------------------------------------------------------
 DIVERT_CAP::DIVERT_CAP()
-    : port(0),
+    : settings(),
+      port(0),
+      disableForwarding(false),
+      errorStr(),
+      thread(),
       nonstop(false),
       isRunning(false),
-      traffCnt(NULL)
+      traffCnt(NULL),
+      logger(GetPluginLogger(GetStgLogger(), "cap_divert"))
 {
 }
 //-----------------------------------------------------------------------------
@@ -101,14 +110,15 @@ if (DivertCapOpen() < 0)
 
 nonstop = true;
 
-if (pthread_create(&thread, NULL, Run, this) == 0)
+if (pthread_create(&thread, NULL, Run, this))
     {
-    return 0;
+    errorStr = "Cannot create thread.";
+    logger("Cannot create thread.");
+    printfd(__FILE__, "Cannot create thread\n");
+    return -1;
     }
 
-errorStr = "Cannot create thread.";
-printfd(__FILE__, "Cannot create thread\n");
-return -1;
+return 0;
 }
 //-----------------------------------------------------------------------------
 int DIVERT_CAP::Stop()
@@ -127,7 +137,8 @@ for (i = 0; i < 25; i++)
     if (!isRunning)
         break;
 
-    usleep(200000);
+    struct timespec ts = {0, 200000000};
+    nanosleep(&ts, NULL);
     }
 
 //after 5 seconds waiting thread still running. now killing it
@@ -136,6 +147,7 @@ if (isRunning)
     if (pthread_kill(thread, SIGINT))
         {
         errorStr = "Cannot kill thread.";
+       logger("Cannot send signal to thread.");
         printfd(__FILE__, "Cannot kill thread\n");
         return -1;
         }
@@ -146,7 +158,11 @@ return 0;
 //-----------------------------------------------------------------------------
 void * DIVERT_CAP::Run(void * d)
 {
-DIVERT_CAP * dc = (DIVERT_CAP *)d;
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
+DIVERT_CAP * dc = static_cast<DIVERT_CAP *>(d);
 dc->isRunning = true;
 
 char buffer[64];
@@ -158,7 +174,7 @@ while (dc->nonstop)
     if (buffer[12] != 0x8)
         continue;
 
-    memcpy(rp.pckt, &buffer[14], pcktSize);
+    memcpy(rp.rawPacket.pckt, &buffer[14], pcktSize);
 
     dc->traffCnt->Process(rp);
     }
@@ -189,6 +205,7 @@ cddiv.sock = socket(PF_INET, SOCK_RAW, IPPROTO_DIVERT);
 if (cddiv.sock < 0)
     {
     errorStr = "Create divert socket error.";
+    logger("Cannot create a socket: %s", strerror(errno));
     printfd(__FILE__, "Cannot create divert socket\n");
     return -1;
     }
@@ -206,6 +223,7 @@ ret = bind(cddiv.sock, (struct sockaddr *)&divAddr, sizeof(divAddr));
 if (ret < 0)
     {
     errorStr = "Bind divert socket error.";
+    logger("Cannot bind the scoket: %s", strerror(errno));
     printfd(__FILE__, "Cannot bind divert socket\n");
     return -1;
     }
@@ -243,7 +261,16 @@ if ((bytes = recvfrom (cddiv.sock, buf, BUFF_LEN,
     if (iface)
         *iface = cddiv.iface;
 
-    sendto(cddiv.sock, buf, bytes, 0, (struct sockaddr*)&divertaddr, divertaddrSize);
+    if (!disableForwarding)
+       {
+        if (sendto(cddiv.sock, buf, bytes, 0, (struct sockaddr*)&divertaddr, divertaddrSize) < 0)
+           logger("sendto error: %s", strerror(errno));
+       }
+    }
+else
+    {
+    if (bytes < 0)
+        logger("recvfrom error: %s", strerror(errno));
     }
 
 return 0;
@@ -265,11 +292,9 @@ pv.param = "Port";
 pvi = std::find(settings.moduleParams.begin(), settings.moduleParams.end(), pv);
 if (pvi == settings.moduleParams.end())
     {
-    port = 15701;
-    return 0;
+    p = 15701;
     }
-
-if (ParseIntInRange(pvi->value[0], 1, 65535, &p))
+else if (ParseIntInRange(pvi->value[0], 1, 65535, &p))
     {
     errorStr = "Cannot parse parameter \'Port\': " + errorStr;
     printfd(__FILE__, "Cannot parse parameter 'Port'\n");
@@ -278,6 +303,22 @@ if (ParseIntInRange(pvi->value[0], 1, 65535, &p))
 
 port = p;
 
+bool d = false;
+pv.param = "DisableForwarding";
+pvi = std::find(settings.moduleParams.begin(), settings.moduleParams.end(), pv);
+if (pvi == settings.moduleParams.end())
+    {
+    disableForwarding = false;
+    }
+else if (ParseYesNo(pvi->value[0], &d))
+    {
+    errorStr = "Cannot parse parameter \'DisableForwarding\': " + errorStr;
+    printfd(__FILE__, "Cannot parse parameter 'DisableForwarding'\n");
+    return -1;
+    }
+
+disableForwarding = d;
+
 return 0;
 }
 //-----------------------------------------------------------------------------