Шустрый
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Сообщений: 99
Регистрация: 7.9.2008
Где: Республика Белару сь, Борисов
Репутация: 1
Всего: 1
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uMain.cpp: | Код |
CGenPacket* packet = new CGenPacket();
if(packet->InitLib(2,2) != 0){
MessageBox(frmMain->Handle,"","",MB_ICONERROR);
return;
}
if(packet->CheckLibVersion(2,2) != 0){
MessageBox(frmMain->Handle,"","",MB_ICONERROR);
return;
}
packet->setLocalIP();
packet->createIPHdr(0, StrToInt(eId->Text), 0, atoi(eLifeTime->Text.c_str()), protocol,"192.168.139.1", eDestAddress->Text.c_str());
if(packet->createSocket() == -1){
MessageBox(frmMain->Handle,"","",MB_ICONERROR);
return;
}
if(packet->setRaw() == -1){
MessageBox(frmMain->Handle,"","",MB_ICONERROR);
return;
}
packet->sendPacket();
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CGenPacket.cpp | Код |
void CGenPacket::createIPHdr(unsigned char tos, unsigned short id,
unsigned short frag_off, unsigned char ttl,
unsigned char protocol, char* saddr,
char* daddr)
{
iph.ip_ihl = 5;
iph.ip_version = IP_VERSION;
iph.ip_tos = tos;
iph.ip_tot_len = sizeof(struct IPHdr);
iph.ip_id = htons(id);
iph.ip_frag_off = 0;
iph.ip_frag_off1 = 0;
iph.ip_rf = 0;
iph.ip_df = 1;
iph.ip_mf = 0;
iph.ip_ttl = ttl;
iph.ip_protocol = protocol;
iph.ip_check = 0;
iph.ip_saddr = inet_addr(saddr);
iph.ip_daddr = inet_addr(daddr);
}
int CGenPacket::InitLib(int v_major, int v_minor)
{
if(WSAStartup(MAKEWORD(v_major, v_minor), &wsadata)!= 0)
return -1;
return 0;
}
int CGenPacket::CheckLibVersion(int v_major, int v_minor)
{
if (LOBYTE(wsadata.wVersion) != v_minor || HIBYTE(wsadata.wVersion) != v_major)
return -1;
return 0;
}
void CGenPacket::setLocalIP()
{
hostent *P;
char s[128];
in_addr in;
char *P2;
gethostname(s, 128);
P = gethostbyname(s);
in.S_un.S_un_b.s_b1 = P->h_addr_list[0][0];
in.S_un.S_un_b.s_b2 = P->h_addr_list[0][1];
in.S_un.S_un_b.s_b3 = P->h_addr_list[0][2];
in.S_un.S_un_b.s_b4 = P->h_addr_list[0][3];
src_addr = inet_ntoa(in);
}
int CGenPacket::createSocket()
{
if((sd = socket(AF_INET,SOCK_RAW,IPPROTO_RAW)) == INVALID_SOCKET)
return -1;
return 0;
}
int CGenPacket::setRaw()
{
bool bOpt;
if(setsockopt(sd, IPPROTO_IP, 2, (char *)&bOpt, sizeof(bOpt)) < 0)
return -1;
return 0;
}
int CGenPacket::sendPacket()
{
char * buffer;
int result;
sockaddr_in target;
unsigned char header_length;
unsigned int packet_length;
memset (&target, 0, sizeof (target));
target.sin_family = AF_INET;
target.sin_addr.s_addr = iph.ip_daddr;
target.sin_port = htons(0);
header_length = sizeof (struct IPHdr); // !!! If IP_OPTIONS, increase...
packet_length = header_length + 0;
iph.ip_check = 0;
if (!iph.ip_tot_len) iph.ip_tot_len = htons (packet_length);
buffer =(char *) calloc (packet_length, sizeof (char));
memcpy (buffer, &iph, sizeof (struct IPHdr));
char *data = NULL;
if (data) memcpy (buffer + header_length, data, 0);
iph.ip_check = getCheckSum((unsigned short *) buffer, packet_length);
memcpy (buffer, &iph, sizeof (struct IPHdr));
result = sendto (sd, buffer, packet_length, 0,(struct sockaddr *)&target, sizeof (target));
return 0;
}
unsigned short CGenPacket::getCheckSum(unsigned short *buffer, int buf_size)
{
unsigned long cksum=0;
while (buf_size > 1){
cksum += *buffer++;
buf_size -= sizeof(unsigned short);
}
if (buf_size)
cksum += *(unsigned short*)buffer;
cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >>16);
return (unsigned short)(~cksum);
}
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