1 // ANNA - Anna is Not Nothingness Anymore //
3 // (c) Copyright 2005-2015 Eduardo Ramos Testillano & Francisco Ruiz Rayo //
5 // See project site at http://redmine.teslayout.com/projects/anna-suite //
6 // See accompanying file LICENSE or copy at http://www.teslayout.com/projects/public/anna.LICENSE //
11 #include <netinet/ip.h>
12 #include <arpa/inet.h>
20 #include <anna/core/DataBlock.hpp>
21 #include <anna/core/util/Tokenizer.hpp>
22 #include <anna/core/functions.hpp>
23 #include <anna/core/tracing/Logger.hpp>
24 #include <anna/core/tracing/TraceWriter.hpp>
25 #include <anna/core/RuntimeException.hpp>
30 // Payload and frame metadata /////////////////////////////////////////////////////////////////////////////
33 std::string _sourceIP;
34 std::string _destinationIP;
36 int _timestampU; // usecs
38 size_t _diameterLength;
45 void setDiameterLength(size_t dl) {
46 if(_diameterLength == -1) {
49 Logger::debug(anna::functions::asString("Diameter message length: %d bytes", dl), ANNA_FILE_LOCATION));
53 void setSourceIP(const std::string &srcIP) throw() {
56 void setDestinationIP(const std::string &dstIP) throw() {
57 _destinationIP = dstIP;
59 void setTimestamp(time_t ts) throw() {
62 void setTimestampU(int tsu) throw() {
65 // Returns true if completed:
66 bool appendData(const char *data, size_t size) throw(RuntimeException) {
68 Logger::debug(anna::functions::asString("Appending %d bytes", size), ANNA_FILE_LOCATION));
69 _data.append(data, size);
71 if(_data.size() > _diameterLength)
72 throw RuntimeException(
73 "Data overflow (unexpected offset exceed diameter message length)",
76 if(_data.size() < _diameterLength)
79 LOGDEBUG(anna::Logger::debug("Completed!", ANNA_FILE_LOCATION));
83 void reset() throw() {
89 _diameterLength = -1; // not calculated yet
92 const std::string &getSourceIP() const throw() {
95 const std::string &getDestinationIP() const throw() {
96 return _destinationIP;
98 time_t getTimestamp() const throw() {
101 int getTimestampU() const throw() {
104 const std::string &getData() const throw() {
107 std::string getDataAsHex() const throw() {
108 return anna::functions::asHexString(
109 anna::DataBlock(_data.c_str(), _data.size()));
113 // Data maps //////////////////////////////////////////////////////////////////////////////////////////////
114 typedef std::map < int /* frame */, Payload > payloads_t;
115 typedef std::map < int /* frame */, Payload >::const_iterator payloads_it;
116 payloads_t G_payloads;
118 // Sniffing structures ////////////////////////////////////////////////////////////////////////////////////
120 /* ethernet headers are always exactly 14 bytes */
121 #define SIZE_ETHERNET 14
122 /* Ethernet addresses are 6 bytes */
123 #define ETHER_ADDR_LEN 6
125 /* Ethernet header */
126 struct sniff_ethernet {
127 u_char ether_dhost[ETHER_ADDR_LEN]; /* Destination host address */
128 u_char ether_shost[ETHER_ADDR_LEN]; /* Source host address */
129 u_short ether_type; /* IP? ARP? RARP? etc */
134 u_char ip_vhl; /* version << 4 | header length >> 2 */
135 u_char ip_tos; /* type of service */
136 u_short ip_len; /* total length */
137 u_short ip_id; /* identification */
138 u_short ip_off; /* fragment offset field */
139 #define IP_RF 0x8000 /* reserved fragment flag */
140 #define IP_DF 0x4000 /* dont fragment flag */
141 #define IP_MF 0x2000 /* more fragments flag */
142 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
143 u_char ip_ttl; /* time to live */
144 u_char ip_p; /* protocol */
145 u_short ip_sum; /* checksum */
146 struct in_addr ip_src, ip_dst; /* source and dest address */
148 #define IP_OFF(ip) (((ip)->ip_off) & IP_OFFMASK)
149 #define IP_DF_VAL(ip) ((((ip)->ip_off) & IP_DF) >> 14)
150 #define IP_MF_VAL(ip) ((((ip)->ip_off) & IP_MF) >> 13)
151 #define IP_HL(ip) (((ip)->ip_vhl) & 0x0f)
152 #define IP_V(ip) (((ip)->ip_vhl) >> 4)
155 typedef u_int tcp_seq;
158 u_short th_sport; /* source port */
159 u_short th_dport; /* destination port */
160 tcp_seq th_seq; /* sequence number */
161 tcp_seq th_ack; /* acknowledgement number */
162 u_char th_offx2; /* data offset, rsvd */
163 #define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4)
173 #define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
174 u_short th_win; /* window */
175 u_short th_sum; /* checksum */
176 u_short th_urp; /* urgent pointer */
179 // Payload extraction /////////////////////////////////////////////////////////////////////////////////////
180 u_char *getPayload(const u_char* packet, int packetSize, int &payloadSize,
181 std::string &srcIp, std::string &dstIp, int &fragmentId, bool &dfFlag,
182 bool &mfFlag, int &fragmentOffset) {
183 const struct sniff_ethernet *ethernet; /* The ethernet header */
184 const struct sniff_ip *ip; /* The IP header */
185 const struct sniff_tcp *tcp; /* The TCP header */
188 ethernet = (struct sniff_ethernet*)(packet);
189 ip = (struct sniff_ip*)(packet + SIZE_ETHERNET);
190 size_ip = IP_HL(ip) * 4; // 4 bytes per 32 bits word
194 Logger::debug(anna::functions::asString("Invalid IP header length: %d bytes", size_ip), ANNA_FILE_LOCATION));
198 static char str[INET_ADDRSTRLEN];
199 inet_ntop(AF_INET, &(ip->ip_src), str, INET_ADDRSTRLEN);
201 inet_ntop(AF_INET, &(ip->ip_dst), str, INET_ADDRSTRLEN);
204 Logger::debug(anna::functions::asString("ip_id: %d | ip_off: %d", ip->ip_id, ip->ip_off), ANNA_FILE_LOCATION));
205 fragmentId = ip->ip_id;
206 dfFlag = IP_DF_VAL(ip);
207 mfFlag = IP_MF_VAL(ip);
208 fragmentOffset = IP_OFF(ip);
209 tcp = (struct sniff_tcp*)(packet + SIZE_ETHERNET + size_ip);
210 size_tcp = TH_OFF(tcp) * 4;
214 Logger::debug(anna::functions::asString("Invalid TCP header length: %d bytes", size_tcp), ANNA_FILE_LOCATION));
218 int payloadOffset = SIZE_ETHERNET + size_ip + size_tcp;
220 Logger::debug(anna::functions::asString("PayloadOffset=%d", payloadOffset), ANNA_FILE_LOCATION));
221 payloadSize = packetSize - payloadOffset;
222 return ((u_char *)(packet + payloadOffset));
225 // Sniffing callback //////////////////////////////////////////////////////////////////////////////////////
226 void my_callback(u_char *useless, const struct pcap_pkthdr* pkthdr,
227 const u_char* packet) {
228 static int count = 1;
229 static Payload auxPayload;
230 int packetSize = pkthdr->len;
232 std::string srcIp, dstIp;
233 int fragmentId, fragmentOffset;
235 const u_char* payload = getPayload(packet, packetSize, payloadSize, srcIp,
236 dstIp, fragmentId, dfFlag, mfFlag, fragmentOffset);
238 if(payload && (payloadSize > 0)) {
240 std::string msg; msg += anna::functions::asString("\nFrame %d:", count); msg += anna::functions::asHexString(anna::DataBlock((const char *)packet, pkthdr->len)); time_t time = pkthdr->ts.tv_sec; msg += "\n"; msg += anna::functions::asString("\ntimestamp %d.%d", pkthdr->ts.tv_sec, pkthdr->ts.tv_usec); msg += anna::functions::asString("\ndate %s", ctime(&time)); msg += anna::functions::asString("\ncaplen %d", pkthdr->caplen); msg += anna::functions::asString("\npacketSize %d", packetSize); msg += anna::functions::asString("\npayloadSize %d", payloadSize); msg += "\nPayload:"; msg += anna::functions::asHexString(anna::DataBlock((const char *)payload, payloadSize)); msg += "\n"; msg += anna::functions::asString("\nsourceIP %s", srcIp.c_str()); msg += anna::functions::asString("\ndestinationIP %s", dstIp.c_str()); msg += "\n"; msg += anna::functions::asString("\nfragmentId %d:", fragmentId); msg += anna::functions::asString("\nDF %s:", (dfFlag ? "1" : "0")); msg += anna::functions::asString("\nMF %s:", (mfFlag ? "1" : "0")); msg += anna::functions::asString("\nfragmentOffset %d:", fragmentOffset);
241 Logger::debug(msg, ANNA_FILE_LOCATION););
242 auxPayload.setDiameterLength(
243 (payload[1] << 16) + (payload[2] << 8) + payload[3]);
244 auxPayload.setSourceIP(srcIp);
245 auxPayload.setDestinationIP(dstIp);
246 auxPayload.setTimestamp(pkthdr->ts.tv_sec);
247 auxPayload.setTimestampU(pkthdr->ts.tv_usec);
248 bool completed = auxPayload.appendData((const char *) payload, payloadSize);
251 G_payloads[count] = auxPayload;
259 bool getDataBlockFromHexFile(const std::string &pathfile, anna::DataBlock &db) throw() {
261 static char buffer[8192];
262 std::ifstream infile(pathfile.c_str(), std::ifstream::in);
264 if(infile.is_open()) {
266 std::string hexString(buffer, strlen(buffer));
267 // Allow colon separator in hex string: we have to remove them before processing with 'fromHexString':
268 hexString.erase(std::remove(hexString.begin(), hexString.end(), ':'), hexString.end());
270 std::string msg = "Hex string (remove colons if exists): ";
272 anna::Logger::debug(msg, ANNA_FILE_LOCATION);
274 anna::functions::fromHexString(hexString, db);
284 void _exit(const std::string &message, int resultCode = 1) {
286 std::cerr << message << std::endl << std::endl;
288 std::cout << message << std::endl << std::endl;
294 //-------------------------------------------------------------------
295 int main(int argc, char **argv) {
296 std::string exec = argv[0];
297 std::string execBN = exec.substr(exec.find_last_of("/") + 1);
298 std::string filetrace = execBN + ".trace";
299 std::cout << std::endl;
301 //check command line arguments
303 std::string msg = "Usage: "; msg += exec;
304 msg += " <pcap file> [--write-hex: to write hex files] [--debug: activates debug level traces (warning by default)]\n\n";
308 // Command-line parameters:
309 std::string inputFile = argv[1];
310 bool isHex = (inputFile.substr(inputFile.find_last_of(".") + 1) == "hex");
311 std::string outputFile = inputFile; // extension will be added later
312 std::string optionals;
314 while(indx < argc) { optionals += " "; optionals += argv[indx]; indx++; }
316 bool debug = (optionals.find("--debug") != std::string::npos);
317 bool writeHex = (optionals.find("--write-hex") != std::string::npos);
318 Logger::setLevel(debug ? Logger::Debug:Logger::Warning);
319 Logger::initialize(execBN.c_str(), new TraceWriter(filetrace.c_str(), 2048000));
321 anna::DataBlock db_aux(true);
323 // SNIFFING //////////////////////////////////////////////////////////////////////////////////////////////7
324 //temporary packet buffers
325 struct pcap_pkthdr header; // The header that pcap gives us
326 const u_char *packet; // The actual packet
330 char errbuf[PCAP_ERRBUF_SIZE]; //not sure what to do with this, oh well
331 handle = pcap_open_offline(inputFile.c_str(), errbuf); //call pcap library function
333 if(handle == NULL) _exit(errbuf, 2);
335 // TODO: add filtering. At the moment, pcap must be previously filtered for diameter protocol ('tcp port 3868' or any other filter allowed)
338 std::string filter = ?????;
339 struct bpf_program _fp;
340 struct bpf_program *fp = &_fp;
341 bpf_u_int32 netmask = 4294967295; // FFFFFFFF
343 if (pcap_compile(handle, fp, (char*)(filter.c_str()), 1, netmask) == -1) {
344 std::cerr << "Couldn't compile the filter " << filter << std::endl;
348 if (pcap_setfilter(handle, fp) == -1) {
349 std::cerr << "Couldn't set the filter " << filter << std::endl;
354 //begin processing the packets in this particular file
359 packets = pcap_dispatch(handle, -1, (pcap_handler) my_callback, NULL);
360 } catch(RuntimeException &ex) {
361 _exit(ex.asString());
364 pcap_close(handle); //close the pcap file
366 // Print payloads //////////////////////////////////////////////////////////////////////////////////////////////
368 outputFile += ".report";
369 std::ofstream out(outputFile.c_str(), std::ifstream::out);
371 for(payloads_it it = G_payloads.begin(); it != G_payloads.end(); it++) {
373 Logger::debug(anna::functions::asString("Dumping frame %d", it->first), ANNA_FILE_LOCATION));
374 time_t ts = (it->second).getTimestamp();
375 int tsu = (it->second).getTimestampU();
376 std::string ts_str = ctime(&ts);
377 ts_str.erase(ts_str.find("\n"));
378 out << "Frame: " << anna::functions::asString(it->first) << std::endl;
379 out << "Date: " << ts_str << std::endl;
380 out << "Timestamp: " << anna::functions::asString((int)ts) << "."
381 << anna::functions::asString((int)tsu) << std::endl;
382 out << "Origin IP: " << (it->second).getSourceIP() << std::endl;
383 out << "Destination IP: " << (it->second).getDestinationIP() << std::endl;
384 out << "Destination IP: " << (it->second).getDestinationIP() << std::endl;
385 out << "Hex String: " << (it->second).getDataAsHex() << std::endl;
389 std::string hexFile = anna::functions::asString(it->first) + ".hex";
390 std::ofstream hex(hexFile.c_str(), std::ifstream::out);
391 hex << (it->second).getDataAsHex();
398 // Close output file:
400 std::string msg = "Open '"; msg += filetrace; msg += "' in order to see process traces.\n";
401 msg += "Open '"; msg += outputFile; msg += "' to see decoding results.\n";
402 if (writeHex) msg += "Open '<frame number>.hex' to see specific frame data.";