RAW Sockets
-
// includes #include <winsock2.h> #include <windows.h> #include <ws2tcpip.h> #include <stdio.h> // header typedef struct iphdr{ unsigned char h_lenver; unsigned char tos; unsigned short total_len; unsigned short ident; unsigned short frag_and_flags; unsigned char ttl; unsigned char proto; unsigned short checksum; unsigned int sourceIP; unsigned int destIP; }IPHDR; typedef struct tcpheader{ unsigned short int sport; unsigned short int dport; unsigned int th_seq; unsigned int th_ack; unsigned char th_x2:4; unsigned char th_off:4; unsigned char Flags; unsigned short int th_win; unsigned short int th_sum; unsigned short int th_urp; }TCPHDR; // main int main() { int s, bytes; char buffer[1024], *data; s = socket(AF_INET, SOCK_RAW, IPPROTO_TCP); if (s == -1) { perror("socket() failed"); return 1; } while(true) { bytes = recv(s, buffer, sizeof(buffer), 0); data = buffer + sizeof(IPHDR) + sizeof(TCPHDR); buffer[bytes] = '\0'; printf("%s", data); fflush(stdout); } // quit return 0; }Wieso scheitert dieses Programm schon beim erstellen des sockets?
-
Ich glaub ich nehm die Frage mal ganz schnell zurück
-
Ok!, Aber warum geht das nicht?
// includes #include <winsock2.h> #include <windows.h> //#include <ws2tcpip.h> #include <stdio.h> // header typedef struct iphdr{ unsigned char h_lenver; unsigned char tos; unsigned short total_len; unsigned short ident; unsigned short frag_and_flags; unsigned char ttl; unsigned char proto; unsigned short checksum; unsigned int sourceIP; unsigned int destIP; }IPHDR; typedef struct tcpheader{ unsigned short int sport; unsigned short int dport; unsigned int th_seq; unsigned int th_ack; unsigned char th_x2:4; unsigned char th_off:4; unsigned char Flags; unsigned short int th_win; unsigned short int th_sum; unsigned short int th_urp; }TCPHDR; // main int main() { int s, bytes; char buffer[1024], *data; WSADATA wsa; WSAStartup(MAKEWORD(1, 1), &wsa); s = socket(AF_INET, SOCK_RAW, IPPROTO_TCP); if (s == -1) { perror("socket() failed"); return 1; } while( (bytes = recv(s, buffer, sizeof(buffer), 0)) > 0) { data = buffer + sizeof(IPHDR) + sizeof(TCPHDR); buffer[bytes] = '\0'; printf("%s", data); fflush(stdout); } // quit return 0; }
-
aloa paranoiac
deine version hat bei mir auch fehler verursacht (BCB 6)
folgender code compiliert jedoch anstandslos:
//--------------------------------------------------------------------------- // includes #include <winsock2.h> #include <windows.h> //#include <ws2tcpip.h> #include <stdio.h> #pragma hdrstop #pragma argsused // header typedef struct iphdr{ unsigned char h_lenver; unsigned char tos; unsigned short total_len; unsigned short ident; unsigned short frag_and_flags; unsigned char ttl; unsigned char proto; unsigned short checksum; unsigned int sourceIP; unsigned int destIP; }IPHDR; typedef struct tcpheader{ unsigned short int sport; unsigned short int dport; unsigned int th_seq; unsigned int th_ack; unsigned char th_x2:4; unsigned char th_off:4; unsigned char Flags; unsigned short int th_win; unsigned short int th_sum; unsigned short int th_urp; }TCPHDR; // main int main() { int s, bytes; char buffer[1024], *data; WSADATA wsa; WSAStartup(MAKEWORD(1, 1), &wsa); s = socket(AF_INET, SOCK_RAW, IPPROTO_TCP); if (s == -1) { perror("socket() failed"); return 1; } while( (bytes = recv(s, buffer, sizeof(buffer), 0)) > 0) { data = buffer + sizeof(IPHDR) + sizeof(TCPHDR); buffer[bytes] = '\0'; printf("%s", data); fflush(stdout); } // quit return 0; }hoffe es hilft dir
Deadman