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Added wrappers to build ARP requests and replies. Defined BROADCAST in EthernetII

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This commit is contained in:
Santiago Alessandri
2011-08-16 13:21:13 -03:00
parent 7bf8bd6ee7
commit cb647d1642
4 changed files with 199 additions and 34 deletions
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85
src/arp.cpp
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@@ -19,17 +19,76 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string>
#include <cstring>
#include <cassert>
#include <netinet/in.h>
#include "arp.h"
#include "ethernetII.h"
#include "rawpdu.h"
#include "utils.h"
using namespace std;
Tins::PDU* Tins::ARP::make_arp_request(const std::string& iface,
const std::string& target,
const std::string& sender,
const uint8_t* hw_snd) {
uint32_t target_ip = Tins::Utils::resolve_ip(target);
uint32_t sender_ip = Tins::Utils::resolve_ip(sender);
return make_arp_request(iface, target_ip, sender_ip, hw_snd);
}
Tins::PDU* Tins::ARP::make_arp_request(const std::string& iface,
uint32_t target,
uint32_t sender,
const uint8_t* hw_snd) {
/* Create ARP packet and set its attributes */
ARP* arp = new ARP();
arp->_arp.ar_tip = target;
arp->_arp.ar_sip = sender;
if (hw_snd) {
memcpy(arp->_arp.ar_sha, hw_snd, 6);
}
arp->_arp.ar_op = Tins::ARP::REQUEST;
/* Create the EthernetII PDU with the ARP PDU as its inner PDU */
EthernetII* eth = new EthernetII(iface, Tins::EthernetII::BROADCAST, hw_snd, arp);
return eth;
}
Tins::PDU* Tins::ARP::make_arp_reply(const std::string& iface,
const std::string& target,
const std::string& sender,
const uint8_t* hw_tgt,
const uint8_t* hw_snd) {
uint32_t target_ip = Tins::Utils::resolve_ip(target);
uint32_t sender_ip = Tins::Utils::resolve_ip(sender);
return make_arp_reply(iface, target_ip, sender_ip, hw_tgt, hw_snd);
}
Tins::PDU* Tins::ARP::make_arp_reply(const std::string& iface,
uint32_t target,
uint32_t sender,
const uint8_t* hw_tgt,
const uint8_t* hw_snd) {
/* Create ARP packet and set its attributes */
ARP* arp = new ARP();
arp->_arp.ar_tip = target;
arp->_arp.ar_sip = sender;
memcpy(arp->_arp.ar_sha, hw_snd, 6);
memcpy(arp->_arp.ar_tha, hw_tgt, 6);
arp->_arp.ar_op = Tins::ARP::REPLY;
/* Create the EthernetII PDU with the ARP PDU as its inner PDU */
EthernetII* eth = new EthernetII(iface, hw_tgt, hw_snd, arp);
return eth;
}
Tins::ARP::ARP() : PDU(0x0608) {
std::memset(&_arp, 0, sizeof(arphdr));
_arp.ar_hrd = 0x0100;
@@ -78,10 +137,26 @@ void Tins::ARP::opcode(Flags new_opcode) {
this->_arp.ar_op = new_opcode;
}
void Tins::ARP::set_arp_request(const string &ip_dst, const string &ip_src, const string &hw_src) {
_arp.ar_tip = Utils::resolve_ip(ip_dst);
_arp.ar_sip = Utils::resolve_ip(ip_src);
_arp.ar_op = REQUEST;
void Tins::ARP::set_arp_request(const std::string& ip_tgt, const std::string& ip_snd, const uint8_t* hw_snd) {
this->_arp.ar_tip = Utils::resolve_ip(ip_tgt);
this->_arp.ar_sip = Utils::resolve_ip(ip_snd);
if (hw_snd) {
memcpy(this->_arp.ar_sha, hw_snd, 6);
}
this->_arp.ar_op = REQUEST;
}
void Tins::ARP::set_arp_reply(const std::string& ip_tgt,
const std::string& ip_snd,
const uint8_t* hw_tgt,
const uint8_t* hw_snd) {
this->_arp.ar_tip = Utils::resolve_ip(ip_tgt);
this->_arp.ar_sip = Utils::resolve_ip(ip_snd);
memcpy(this->_arp.ar_tha, hw_tgt, 6);
memcpy(this->_arp.ar_sha, hw_snd, 6);
this->_arp.ar_op = REPLY;
}
uint32_t Tins::ARP::header_size() const {