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"
55 #include "ether_cap.h"
59 //-----------------------------------------------------------------------------
60 //-----------------------------------------------------------------------------
61 //-----------------------------------------------------------------------------
62 PLUGIN_CREATOR<BPF_CAP> bcc;
63 //-----------------------------------------------------------------------------
64 //-----------------------------------------------------------------------------
65 //-----------------------------------------------------------------------------
68 return bcc.GetPlugin();
70 //-----------------------------------------------------------------------------
71 //-----------------------------------------------------------------------------
72 //-----------------------------------------------------------------------------
73 int BPF_CAP_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
77 iface.erase(iface.begin(), iface.end());
79 if (s.moduleParams.empty())
81 errorStr = "Parameter \'iface\' not found.";
82 printfd(__FILE__, "Parameter 'iface' not found\n");
86 for (unsigned i = 0; i < s.moduleParams.size(); i++)
88 if (s.moduleParams[i].param != "iface")
90 errorStr = "Parameter \'" + s.moduleParams[i].param + "\' unrecognized.";
91 printfd(__FILE__, "Invalid parameter: '%s'\n", s.moduleParams[i].param.c_str());
94 for (unsigned j = 0; j < s.moduleParams[i].value.size(); j++)
96 iface.push_back(s.moduleParams[i].value[j]);
102 //-----------------------------------------------------------------------------
103 std::string BPF_CAP_SETTINGS::GetIface(unsigned int num)
105 if (num >= iface.size())
111 //-----------------------------------------------------------------------------
112 //-----------------------------------------------------------------------------
113 //-----------------------------------------------------------------------------
114 const std::string BPF_CAP::GetVersion() const
116 return "bpf_cap v.1.0";
118 //-----------------------------------------------------------------------------
132 //-----------------------------------------------------------------------------
133 int BPF_CAP::ParseSettings()
135 int ret = capSettings.ParseSettings(settings);
138 errorStr = capSettings.GetStrError();
143 //-----------------------------------------------------------------------------
149 if (BPFCapOpen() < 0)
151 //errorStr = "Cannot open bpf device!";
157 if (pthread_create(&thread, NULL, Run, this) == 0)
162 errorStr = "Cannot create thread.";
163 printfd(__FILE__, "Cannot create thread\n");
166 //-----------------------------------------------------------------------------
176 //5 seconds to thread stops itself
178 for (i = 0; i < 25; i++)
186 //after 5 seconds waiting thread still running. now killing it
189 //TODO pthread_cancel()
190 if (pthread_kill(thread, SIGINT))
192 errorStr = "Cannot kill thread.";
193 printfd(__FILE__, "Cannot kill thread\n");
200 //-----------------------------------------------------------------------------
201 void * BPF_CAP::Run(void * d)
203 BPF_CAP * dc = (BPF_CAP *)d;
204 dc->isRunning = true;
206 uint8_t hdr[96]; //68 + 14 + 4(size) + 9(SYS_IFACE) + 1(align to 4) = 96
208 RAW_PACKET * rpp = (RAW_PACKET *)&hdr[14];
209 memset(hdr, 0, sizeof(hdr));
216 dc->BPFCapRead((char*)&hdr, 68 + 14, &iface);
218 if (!(hdr[12] == 0x8 && hdr[13] == 0x0))
223 dc->traffCnt->Process(*rpp);
226 dc->isRunning = false;
229 //-----------------------------------------------------------------------------
230 int BPF_CAP::BPFCapOpen()
236 while ((bd.iface = capSettings.GetIface(i)) != "")
238 bpfData.push_back(bd);
239 if (BPFCapOpen(&bpfData[i]) < 0)
245 pd.fd = bpfData[i].fd;
252 //-----------------------------------------------------------------------------
253 int BPF_CAP::BPFCapOpen(BPF_DATA * bd)
263 sprintf(devbpf, "/dev/bpf%d", i);
265 bd->fd = open(devbpf, O_RDONLY);
266 } while(bd->fd < 0 && errno == EBUSY);
270 errorStr = "Can't capture packets. Open bpf device for " + bd->iface + " error.";
271 printfd(__FILE__, "Cannot open BPF device\n");
275 strncpy(ifr.ifr_name, bd->iface.c_str(), sizeof(ifr.ifr_name));
277 if (ioctl(bd->fd, BIOCSBLEN, (caddr_t)&l) < 0)
279 errorStr = bd->iface + " BIOCSBLEN " + std::string(strerror(errno));
280 printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
284 if (ioctl(bd->fd, BIOCSETIF, (caddr_t)&ifr) < 0)
286 errorStr = bd->iface + " BIOCSETIF " + std::string(strerror(errno));
287 printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
291 if (ioctl(bd->fd, BIOCIMMEDIATE, &im) < 0)
293 errorStr = bd->iface + " BIOCIMMEDIATE " + std::string(strerror(errno));
294 printfd(__FILE__, "ioctl failed: '%s'\n", errorStr.c_str());
300 //-----------------------------------------------------------------------------
301 int BPF_CAP::BPFCapClose()
303 for (unsigned int i = 0; i < bpfData.size(); i++)
304 close(bpfData[i].fd);
307 //-----------------------------------------------------------------------------
308 int BPF_CAP::BPFCapRead(char * buffer, int blen, char ** capIface)
310 poll(&polld[0], polld.size(), -1);
312 for (unsigned int i = 0; i < polld.size(); i++)
314 if (polld[i].revents & POLLIN)
316 BPFCapRead(buffer, blen, capIface, &bpfData[i]);
317 polld[i].revents = 0;
323 //-----------------------------------------------------------------------------
324 int BPF_CAP::BPFCapRead(char * buffer, int blen, char **, BPF_DATA * bd)
328 bd->r = read(bd->fd, bd->buffer, BUFF_LEN);
331 //printfd(__FILE__, " error read\n");
336 bd->bh = (struct bpf_hdr*)bd->p;
342 memcpy(buffer, (char*)(bd->p) + bd->bh->bh_hdrlen, blen);
344 bd->sum += BPF_WORDALIGN(bd->bh->bh_hdrlen + bd->bh->bh_caplen);
345 bd->p = bd->p + BPF_WORDALIGN(bd->bh->bh_hdrlen + bd->bh->bh_caplen);
346 bd->bh = (struct bpf_hdr*)bd->p;
357 //-----------------------------------------------------------------------------