X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/f7163d9c994af13f0f72f49f7203b7ac3e281a1e..ed482e49fcd8341061473ff39e683a951b84da20:/projects/stargazer/plugins/capture/ether_freebsd/ether_cap.cpp

diff --git a/projects/stargazer/plugins/capture/ether_freebsd/ether_cap.cpp b/projects/stargazer/plugins/capture/ether_freebsd/ether_cap.cpp
index 20ca2480..254fd3f9 100644
--- a/projects/stargazer/plugins/capture/ether_freebsd/ether_cap.cpp
+++ b/projects/stargazer/plugins/capture/ether_freebsd/ether_cap.cpp
@@ -39,19 +39,20 @@ $Author: faust $
 #include <net/if.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-
-#include <errno.h>
 #include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <signal.h>
 #include <unistd.h>
 
+#include <cerrno>
+#include <cstdio>
+#include <cstring>
+#include <cstdlib>
+#include <csignal>
+
 #include "stg/common.h"
 #include "stg/raw_ip_packet.h"
 #include "stg/traffcounter.h"
 #include "stg/plugin_creator.h"
+
 #include "ether_cap.h"
 
 //#define CAP_DEBUG 1
@@ -59,7 +60,12 @@ $Author: faust $
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
+namespace
+{
 PLUGIN_CREATOR<BPF_CAP> bcc;
+}
+
+extern "C" PLUGIN * GetPlugin();
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
@@ -72,8 +78,6 @@ return bcc.GetPlugin();
 //-----------------------------------------------------------------------------
 int BPF_CAP_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
 {
-std::string ifaces;
-
 iface.erase(iface.begin(), iface.end());
 
 if (s.moduleParams.empty())
@@ -111,16 +115,23 @@ return iface[num];
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
-const std::string BPF_CAP::GetVersion() const
+std::string BPF_CAP::GetVersion() const
 {
-return "bpf_cap v.1.0";
+return "cap_bpf v.1.0";
 }
 //-----------------------------------------------------------------------------
 BPF_CAP::BPF_CAP()
-    : nonstop(false),
+    : capSettings(),
+      errorStr(),
+      bpfData(),
+      polld(),
+      thread(),
+      nonstop(false),
       isRunning(false),
       capSock(-1),
-      traffCnt(NULL)
+      settings(),
+      traffCnt(NULL),
+      logger(GetPluginLogger(GetStgLogger(), "cap_bpf"))
 {
 }
 //-----------------------------------------------------------------------------
@@ -148,14 +159,15 @@ if (BPFCapOpen() < 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 BPF_CAP::Stop()
@@ -174,7 +186,8 @@ 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
@@ -184,6 +197,7 @@ 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;
         }
@@ -194,7 +208,11 @@ return 0;
 //-----------------------------------------------------------------------------
 void * BPF_CAP::Run(void * d)
 {
-BPF_CAP * dc = (BPF_CAP *)d;
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
+BPF_CAP * dc = static_cast<BPF_CAP *>(d);
 dc->isRunning = true;
 
 uint8_t hdr[96]; //68 + 14 + 4(size) + 9(SYS_IFACE) + 1(align to 4) = 96
@@ -207,12 +225,11 @@ char * iface;
 
 while (dc->nonstop)
     {
-    dc->BPFCapRead((char*)&hdr, 68 + 14, &iface);
+    if (dc->BPFCapRead((char*)&hdr, 68 + 14, &iface))
+        continue;
 
     if (!(hdr[12] == 0x8 && hdr[13] == 0x0))
-    {
         continue;
-    }
 
     dc->traffCnt->Process(*rpp);
     }
@@ -262,6 +279,7 @@ do
 if (bd->fd < 0)
     {
     errorStr = "Can't capture packets. Open bpf device for " + bd->iface + " error.";
+    logger("Cannot open device for interface '%s': %s", bd->iface.c_str(), strerror(errno));
     printfd(__FILE__, "Cannot open BPF device\n");
     return -1;
     }
@@ -271,6 +289,7 @@ strncpy(ifr.ifr_name, bd->iface.c_str(), sizeof(ifr.ifr_name));
 if (ioctl(bd->fd, BIOCSBLEN, (caddr_t)&l) < 0)
     {
     errorStr = bd->iface + " BIOCSBLEN " + std::string(strerror(errno));
+    logger("ioctl (BIOCSBLEN) error for interface '%s': %s", bd->iface.c_str(), strerror(errno));
     printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
     return -1;
     }
@@ -278,6 +297,7 @@ if (ioctl(bd->fd, BIOCSBLEN, (caddr_t)&l) < 0)
 if (ioctl(bd->fd, BIOCSETIF, (caddr_t)&ifr) < 0)
     {
     errorStr = bd->iface + " BIOCSETIF " + std::string(strerror(errno));
+    logger("ioctl (BIOCSETIF) error for interface '%s': %s", bd->iface.c_str(), strerror(errno));
     printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
     return -1;
     }
@@ -285,6 +305,7 @@ if (ioctl(bd->fd, BIOCSETIF, (caddr_t)&ifr) < 0)
 if (ioctl(bd->fd, BIOCIMMEDIATE, &im) < 0)
     {
     errorStr = bd->iface + " BIOCIMMEDIATE " + std::string(strerror(errno));
+    logger("ioctl (BIOCIMMEDIATE) error for interface '%s': %s", bd->iface.c_str(), strerror(errno));
     printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
     return -1;
     }
@@ -307,12 +328,16 @@ for (unsigned int i = 0; i < polld.size(); i++)
     {
     if (polld[i].revents & POLLIN)
         {
-        BPFCapRead(buffer, blen, capIface, &bpfData[i]);
+        if (BPFCapRead(buffer, blen, capIface, &bpfData[i]))
+            {
+            polld[i].revents = 0;
+            continue;
+            }
         polld[i].revents = 0;
         return 0;
         }
     }
-return 0;
+return -1;
 }
 //-----------------------------------------------------------------------------
 int BPF_CAP::BPFCapRead(char * buffer, int blen, char **, BPF_DATA * bd)
@@ -322,8 +347,10 @@ if (bd->canRead)
     bd->r = read(bd->fd, bd->buffer, BUFF_LEN);
     if (bd->r < 0)
         {
-        //printfd(__FILE__, " error read\n");
-        usleep(20000);
+        logger("read error: %s", strerror(errno));
+        struct timespec ts = {0, 20000000};
+        nanosleep(&ts, NULL);
+        return -1;
         }
 
     bd->p = bd->buffer;