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Added ARP class. It's not working yet.

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This commit is contained in:
Matias Fontanini
2011-08-15 18:17:28 -03:00
parent b76c9d0525
commit 835229f104
2 changed files with 83 additions and 0 deletions
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40
src/arp.cpp Normal file
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#include <cstring>
#include <cassert>
#include <netinet/in.h>
#include "arp.h"
#include "utils.h"
using namespace std;
Tins::ARP::ARP() : PDU(0x0608) {
std::memset(&_arp, 0, sizeof(arphdr));
_arp.ar_hrd = 0x0100;
_arp.ar_pro = 0x0008;
_arp.ar_hln = 6;
_arp.ar_pln = 4;
}
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);
}
uint32_t Tins::ARP::header_size() const {
return sizeof(arphdr);
}
void Tins::ARP::write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *) {
assert(total_sz >= sizeof(arphdr));
memcpy(buffer, &_arp, sizeof(arphdr));
}
bool Tins::ARP::send(PacketSender* sender) {
struct sockaddr_in link_addr;
link_addr.sin_family = AF_INET;
link_addr.sin_port = 0;
link_addr.sin_addr.s_addr = _arp.ar_sip;
return sender->send_l3(this, (struct sockaddr*)&link_addr, sizeof(link_addr), PacketSender::IP_SOCKET);
}