2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Author : Boris Mikhailenko <stg34@stg.dp.ua>
23 $Date: 2010/09/10 06:43:03 $
25 #include <sys/types.h>
26 #include <sys/socket.h>
27 #include <netinet/in.h>
31 #include <sys/ioctl.h>
46 #include "stg/common.h"
47 #include "stg/traffcounter.h"
48 #include "stg/plugin_creator.h"
49 #include "divert_cap.h"
51 #define BUFF_LEN (16384) /* max mtu -> lo=16436 TODO why?*/
53 //-----------------------------------------------------------------------------
59 //-----------------------------------------------------------------------------
61 DIVERT_DATA cddiv; //capture data
62 //-----------------------------------------------------------------------------
63 //-----------------------------------------------------------------------------
64 //-----------------------------------------------------------------------------
67 PLUGIN_CREATOR<DIVERT_CAP> dcc;
70 extern "C" PLUGIN * GetPlugin();
71 //-----------------------------------------------------------------------------
72 //-----------------------------------------------------------------------------
73 //-----------------------------------------------------------------------------
76 return dcc.GetPlugin();
78 //-----------------------------------------------------------------------------
79 //-----------------------------------------------------------------------------
80 //-----------------------------------------------------------------------------
81 std::string DIVERT_CAP::GetVersion() const
83 return "cap_divert v.1.0";
85 //-----------------------------------------------------------------------------
86 DIVERT_CAP::DIVERT_CAP()
88 disableForwarding(false),
92 logger(GetPluginLogger(GetStgLogger(), "cap_divert"))
95 //-----------------------------------------------------------------------------
96 int DIVERT_CAP::Start()
101 if (DivertCapOpen() < 0)
103 errorStr = "Cannot open socket!";
104 printfd(__FILE__, "Cannot open socket\n");
110 if (pthread_create(&thread, NULL, Run, this))
112 errorStr = "Cannot create thread.";
113 logger("Cannot create thread.");
114 printfd(__FILE__, "Cannot create thread\n");
120 //-----------------------------------------------------------------------------
121 int DIVERT_CAP::Stop()
130 //5 seconds to thread stops itself
132 for (i = 0; i < 25; i++)
137 struct timespec ts = {0, 200000000};
138 nanosleep(&ts, NULL);
141 //after 5 seconds waiting thread still running. now killing it
144 if (pthread_kill(thread, SIGINT))
146 errorStr = "Cannot kill thread.";
147 logger("Cannot send signal to thread.");
148 printfd(__FILE__, "Cannot kill thread\n");
155 //-----------------------------------------------------------------------------
156 void * DIVERT_CAP::Run(void * d)
159 sigfillset(&signalSet);
160 pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
162 DIVERT_CAP * dc = static_cast<DIVERT_CAP *>(d);
163 dc->isRunning = true;
165 char buffer[pcktSize + 14];
169 dc->DivertCapRead(buffer, sizeof(buffer), NULL);
171 if (buffer[12] != 0x8)
174 memcpy(rp.rawPacket.pckt, &buffer[14], pcktSize);
176 dc->traffCnt->Process(rp);
179 dc->isRunning = false;
182 //-----------------------------------------------------------------------------
183 int DIVERT_CAP::DivertCapOpen()
185 memset(&pollddiv, 0, sizeof(pollddiv));
186 memset(&cddiv, 0, sizeof(DIVERT_DATA));
188 strcpy(cddiv.iface, "foo");
192 pollddiv.events = POLLIN;
193 pollddiv.fd = cddiv.sock;
197 //-----------------------------------------------------------------------------
198 int DIVERT_CAP::DivertCapOpen(int)
201 cddiv.sock = socket(PF_INET, SOCK_RAW, IPPROTO_DIVERT);
204 errorStr = "Create divert socket error.";
205 logger("Cannot create a socket: %s", strerror(errno));
206 printfd(__FILE__, "Cannot create divert socket\n");
210 struct sockaddr_in divAddr;
212 memset(&divAddr, 0, sizeof(divAddr));
214 divAddr.sin_family = AF_INET;
215 divAddr.sin_port = htons(cddiv.port);
216 divAddr.sin_addr.s_addr = INADDR_ANY;
218 ret = bind(cddiv.sock, (struct sockaddr *)&divAddr, sizeof(divAddr));
222 errorStr = "Bind divert socket error.";
223 logger("Cannot bind the scoket: %s", strerror(errno));
224 printfd(__FILE__, "Cannot bind divert socket\n");
230 //-----------------------------------------------------------------------------
231 int DIVERT_CAP::DivertCapRead(char * b, int blen, char ** iface)
233 poll(&pollddiv, 1, -1);
235 if (pollddiv.revents & POLLIN)
237 DivertCapRead(b, blen, iface, 0);
238 pollddiv.revents = 0;
244 //-----------------------------------------------------------------------------
245 int DIVERT_CAP::DivertCapRead(char * b, int blen, char ** iface, int)
247 static char buf[BUFF_LEN];
248 static struct sockaddr_in divertaddr;
250 static socklen_t divertaddrSize = sizeof(divertaddr);
252 if ((bytes = recvfrom (cddiv.sock, buf, BUFF_LEN,
253 0, (struct sockaddr*) &divertaddr, &divertaddrSize)) > 50)
255 memcpy(b + 14, buf, blen - 14);
259 *iface = cddiv.iface;
261 if (!disableForwarding)
263 if (sendto(cddiv.sock, buf, bytes, 0, (struct sockaddr*)&divertaddr, divertaddrSize) < 0)
264 logger("sendto error: %s", strerror(errno));
270 logger("recvfrom error: %s", strerror(errno));
275 //-----------------------------------------------------------------------------
276 int DIVERT_CAP::DivertCapClose()
281 //-----------------------------------------------------------------------------
282 int DIVERT_CAP::ParseSettings()
286 std::vector<PARAM_VALUE>::const_iterator pvi;
289 pvi = std::find(settings.moduleParams.begin(), settings.moduleParams.end(), pv);
290 if (pvi == settings.moduleParams.end() || pvi->value.empty())
294 else if (ParseIntInRange(pvi->value[0], 1, 65535, &p))
296 errorStr = "Cannot parse parameter \'Port\': " + errorStr;
297 printfd(__FILE__, "Cannot parse parameter 'Port'\n");
304 pv.param = "DisableForwarding";
305 pvi = std::find(settings.moduleParams.begin(), settings.moduleParams.end(), pv);
306 if (pvi == settings.moduleParams.end() || pvi->value.empty())
308 disableForwarding = false;
310 else if (ParseYesNo(pvi->value[0], &d))
312 errorStr = "Cannot parse parameter \'DisableForwarding\': " + errorStr;
313 printfd(__FILE__, "Cannot parse parameter 'DisableForwarding'\n");
317 disableForwarding = d;
321 //-----------------------------------------------------------------------------