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Code Issues Releases Wiki Activity

Fixed bug in Utils::pseudoheader_checksum.

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This commit is contained in:
Matias Fontanini
2012-03-06 09:16:31 -03:00
parent 21c864afb0
commit a49ac24972
6 changed files with 4177 additions and 25 deletions
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36
examples/portscan.cpp
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@@ -23,12 +23,12 @@
#include <string>
#include <cstdlib>
#include <pthread.h>
#include "ip.h"
#include "tcp.h"
#include "ethernetII.h"
#include "sniffer.h"
#include "utils.h"
#include "packetsender.h"
#include <tins/ip.h>
#include <tins/tcp.h>
#include <tins/ethernetII.h>
#include <tins/sniffer.h>
#include <tins/utils.h>
#include <tins/packetsender.h>
using namespace std;
@@ -40,19 +40,14 @@ using namespace Tins;
*/
struct ScanHandler {
bool operator() (PDU *pdu) {
// Down-cast the inner PDU to IP.
IP *ip = dynamic_cast<IP*>(pdu->inner_pdu());
if(ip) {
// Down-cast IP's inner PDU to TCP.
TCP *tcp = dynamic_cast<TCP*>(ip->inner_pdu());
if(tcp) {
// Ok, it's a TCP PDU. Is RST flag on? Then port is closed.
if(tcp->get_flag(TCP::RST))
cout << "Port: " << tcp->sport() << " closed\n";
// Is SYN flag on? Then port is open!
else if(tcp->get_flag(TCP::SYN))
cout << "Port: " << tcp->sport() << " open\n";
}
TCP *tcp = (pdu->find_inner_pdu<TCP>(PDU::TCP));
if(tcp) {
// Ok, it's a TCP PDU. Is RST flag on? Then port is closed.
if(tcp->get_flag(TCP::RST))
cout << "Port: " << tcp->sport() << " closed\n";
// Is SYN flag on? Then port is open!
else if(tcp->get_flag(TCP::SYN))
cout << "Port: " << tcp->sport() << " open\n";
}
return true;
}
@@ -91,8 +86,9 @@ void *thread_proc(void *param) {
// The required subclass of AbstractSnifferHandler which will serve as
// a proxy to our handler.
AbstractSnifferHandler *my_handler = new SnifferHandler<ScanHandler>(&handler);
sniffer->set_filter("tcp and ip src " + *data + " and tcp[tcpflags] & (tcp-rst|tcp-syn) != 0");
// Sniff loop. Only sniff TCP PDUs comming from the given IP and have either RST or SYN flag on.
sniffer->sniff_loop(my_handler, "tcp and ip src " + *data + " and tcp[tcpflags] & (tcp-rst|tcp-syn) != 0");
sniffer->sniff_loop(my_handler);
delete my_handler;
return 0;
}