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PORaw Socket send TCP SYN-FIN-.. in c++
 

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  1. PORaw Socket send TCP SYN-FIN-.. in c++
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    <p>My teacher want us to do an exercise on raw socket in c ++ on Windows (for learning tcp communication).</p> <p>I have got a problem with it. I saw a lot of documentation but I don't know how to solve it.</p> <pre><code>int raw() { WSADATA WSAData; SOCKET sock; SOCKADDR_IN sin,din; WSAStartup(MAKEWORD(2, 2), &amp;WSAData); char datagram[MAX_PACKET_SIZE]; struct iphdr *iph = (struct iphdr *)datagram; struct tcphdr *tcph = (struct tcphdr *)((UCHAR *)iph + sizeof(tcphdr)); char new_ip[sizeof "255.255.255.255"]; sock = socket(PF_INET, SOCK_RAW, IPPROTO_TCP); if (sock == INVALID_SOCKET) cout &lt;&lt; "failled init socket" &lt;&lt; endl ; else{ memset(datagram, 0, MAX_PACKET_SIZE); // Clear the data setup_ip_header(iph); setup_tcp_header(tcph); sin.sin_family = AF_INET; sin.sin_port = htons(8888); sin.sin_addr.s_addr = inet_addr("192.168.1.10"); //source ip din.sin_family = AF_INET; din.sin_port = htons(DEST_PORT); din.sin_addr.s_addr = inet_addr(TARGET_SERV_IP); //ip serv to connect tcph-&gt;port_dest = htons(DEST_PORT); iph-&gt;ip_dest = din.sin_addr.s_addr; iph-&gt;ip_source = sin.sin_addr.s_addr; iph-&gt;ip_dest = inet_addr(TARGET_SERV_IP); //ip serv to connect iph-&gt;ip_source = inet_addr("192.168.1.10"); //source ip //iph-&gt;checksum = csum((unsigned short *)datagram, iph-&gt;tot_len &gt;&gt; 1); iph-&gt;checksum = csum((unsigned short *)datagram, sizeof(struct iphdr)); int one = 1; const int *val = &amp;one; if (setsockopt(sock, IPPROTO_IP, IP_HDRINCL, (char *)val, sizeof(one)) &lt; 0) printf("failled set socket option IP_HDRINCL"); else{ if (sendto(sock, /* our socket */ datagram, /* the buffer containing headers and data */ ntohs( iph-&gt;tot_len), /* total length of our datagram */ 0, /* routing flags, normally always 0 */ (struct sockaddr *) &amp;sin, /* socket addr, just like in */ sizeof(sin)) &lt; 0) /* a normal send() */ cout &lt;&lt; stderr &lt;&lt; "sendto() error!!!.\n " &lt;&lt; WSAGetLastError() &lt;&lt; endl; else cout &lt;&lt; "packet send\n" &lt;&lt; endl; } closesocket(sock); } } </code></pre> <p>My error occurs at the sendto(). it return 10022 error = WSAEINVAL</p> <p>I saw that can be a new windows protection?</p> <p>Have you any idea to fix my problem or bypass the protection (go deeper, driver, etc)</p>
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    1. USuser1778354
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    1. COIs your app running with admin privileges? RAW sockets are restricted to administrators.
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      1. PORaw Socket send TCP SYN-FIN-.. in c++
      1. USRemy Lebeau
    2. COI try by right clicking and "run as Admin" same effect.
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      1. PORaw Socket send TCP SYN-FIN-.. in c++
      1. USuser1778354
    3. COAre you fully populating tcph? There are some funky duplicate iph fields being set.
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      1. PORaw Socket send TCP SYN-FIN-.. in c++
      1. USChristopher Oicles
 

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