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
22 * Author : Boris Mikhailenko <stg34@stg.dp.ua>
27 $Date: 2009/03/24 11:20:15 $
31 #include <sys/types.h>
33 #include <sys/socket.h>
35 #include <sys/ioctl.h>
40 #include <netinet/in.h>
41 #include <arpa/inet.h>
51 #include "stg/common.h"
52 #include "stg/raw_ip_packet.h"
53 #include "stg/traffcounter.h"
54 #include "stg/plugin_creator.h"
56 #include "ether_cap.h"
60 //-----------------------------------------------------------------------------
61 //-----------------------------------------------------------------------------
62 //-----------------------------------------------------------------------------
63 PLUGIN_CREATOR<BPF_CAP> bcc;
64 //-----------------------------------------------------------------------------
65 //-----------------------------------------------------------------------------
66 //-----------------------------------------------------------------------------
69 return bcc.GetPlugin();
71 //-----------------------------------------------------------------------------
72 //-----------------------------------------------------------------------------
73 //-----------------------------------------------------------------------------
74 int BPF_CAP_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
78 iface.erase(iface.begin(), iface.end());
80 if (s.moduleParams.empty())
82 errorStr = "Parameter \'iface\' not found.";
83 printfd(__FILE__, "Parameter 'iface' not found\n");
87 for (unsigned i = 0; i < s.moduleParams.size(); i++)
89 if (s.moduleParams[i].param != "iface")
91 errorStr = "Parameter \'" + s.moduleParams[i].param + "\' unrecognized.";
92 printfd(__FILE__, "Invalid parameter: '%s'\n", s.moduleParams[i].param.c_str());
95 for (unsigned j = 0; j < s.moduleParams[i].value.size(); j++)
97 iface.push_back(s.moduleParams[i].value[j]);
103 //-----------------------------------------------------------------------------
104 std::string BPF_CAP_SETTINGS::GetIface(unsigned int num)
106 if (num >= iface.size())
112 //-----------------------------------------------------------------------------
113 //-----------------------------------------------------------------------------
114 //-----------------------------------------------------------------------------
115 const std::string BPF_CAP::GetVersion() const
117 return "bpf_cap v.1.0";
119 //-----------------------------------------------------------------------------
133 //-----------------------------------------------------------------------------
134 int BPF_CAP::ParseSettings()
136 int ret = capSettings.ParseSettings(settings);
139 errorStr = capSettings.GetStrError();
144 //-----------------------------------------------------------------------------
150 if (BPFCapOpen() < 0)
152 //errorStr = "Cannot open bpf device!";
158 if (pthread_create(&thread, NULL, Run, this) == 0)
163 errorStr = "Cannot create thread.";
164 printfd(__FILE__, "Cannot create thread\n");
167 //-----------------------------------------------------------------------------
177 //5 seconds to thread stops itself
179 for (i = 0; i < 25; i++)
184 struct timespec ts = {0, 200000000};
185 nanosleep(&ts, NULL);
188 //after 5 seconds waiting thread still running. now killing it
191 //TODO pthread_cancel()
192 if (pthread_kill(thread, SIGINT))
194 errorStr = "Cannot kill thread.";
195 printfd(__FILE__, "Cannot kill thread\n");
202 //-----------------------------------------------------------------------------
203 void * BPF_CAP::Run(void * d)
206 sigfillset(&signalSet);
207 pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
209 BPF_CAP * dc = static_cast<BPF_CAP *>(d);
210 dc->isRunning = true;
212 uint8_t hdr[96]; //68 + 14 + 4(size) + 9(SYS_IFACE) + 1(align to 4) = 96
214 RAW_PACKET * rpp = (RAW_PACKET *)&hdr[14];
215 memset(hdr, 0, sizeof(hdr));
222 if (dc->BPFCapRead((char*)&hdr, 68 + 14, &iface))
225 if (!(hdr[12] == 0x8 && hdr[13] == 0x0))
228 dc->traffCnt->Process(*rpp);
231 dc->isRunning = false;
234 //-----------------------------------------------------------------------------
235 int BPF_CAP::BPFCapOpen()
241 while ((bd.iface = capSettings.GetIface(i)) != "")
243 bpfData.push_back(bd);
244 if (BPFCapOpen(&bpfData[i]) < 0)
250 pd.fd = bpfData[i].fd;
257 //-----------------------------------------------------------------------------
258 int BPF_CAP::BPFCapOpen(BPF_DATA * bd)
268 sprintf(devbpf, "/dev/bpf%d", i);
270 bd->fd = open(devbpf, O_RDONLY);
271 } while(bd->fd < 0 && errno == EBUSY);
275 errorStr = "Can't capture packets. Open bpf device for " + bd->iface + " error.";
276 printfd(__FILE__, "Cannot open BPF device\n");
280 strncpy(ifr.ifr_name, bd->iface.c_str(), sizeof(ifr.ifr_name));
282 if (ioctl(bd->fd, BIOCSBLEN, (caddr_t)&l) < 0)
284 errorStr = bd->iface + " BIOCSBLEN " + std::string(strerror(errno));
285 printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
289 if (ioctl(bd->fd, BIOCSETIF, (caddr_t)&ifr) < 0)
291 errorStr = bd->iface + " BIOCSETIF " + std::string(strerror(errno));
292 printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
296 if (ioctl(bd->fd, BIOCIMMEDIATE, &im) < 0)
298 errorStr = bd->iface + " BIOCIMMEDIATE " + std::string(strerror(errno));
299 printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
305 //-----------------------------------------------------------------------------
306 int BPF_CAP::BPFCapClose()
308 for (unsigned int i = 0; i < bpfData.size(); i++)
309 close(bpfData[i].fd);
312 //-----------------------------------------------------------------------------
313 int BPF_CAP::BPFCapRead(char * buffer, int blen, char ** capIface)
315 poll(&polld[0], polld.size(), -1);
317 for (unsigned int i = 0; i < polld.size(); i++)
319 if (polld[i].revents & POLLIN)
321 if (BPFCapRead(buffer, blen, capIface, &bpfData[i]))
323 polld[i].revents = 0;
326 polld[i].revents = 0;
332 //-----------------------------------------------------------------------------
333 int BPF_CAP::BPFCapRead(char * buffer, int blen, char **, BPF_DATA * bd)
337 bd->r = read(bd->fd, bd->buffer, BUFF_LEN);
340 struct timespec ts = {0, 20000000};
341 nanosleep(&ts, NULL);
346 bd->bh = (struct bpf_hdr*)bd->p;
352 memcpy(buffer, (char*)(bd->p) + bd->bh->bh_hdrlen, blen);
354 bd->sum += BPF_WORDALIGN(bd->bh->bh_hdrlen + bd->bh->bh_caplen);
355 bd->p = bd->p + BPF_WORDALIGN(bd->bh->bh_hdrlen + bd->bh->bh_caplen);
356 bd->bh = (struct bpf_hdr*)bd->p;
367 //-----------------------------------------------------------------------------