91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
#include <getopt.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <pcap.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "dns.h"
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#include "parsing.h"
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#include "print.h"
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#include "scan.h"
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#include "thread.h"
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static int scan_host(char *host, const struct option_lst *options)
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{
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char ip_addr[INET_ADDRSTRLEN];
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struct sockaddr_in addr_con;
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host[strcspn(host, "\n")] = '\0';
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if (dns_lookup(ip_addr, host, &addr_con)) {
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dprintf(2,
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"ft_nmap: failed to retrieve ip address from "
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"'%s'\n",
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host);
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return 1;
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}
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struct response responses[1024] = {0};
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if (create_threads(options, ip_addr, responses) < 0)
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return 1;
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static const char *types_str[] = {
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"NULL", "SYN", "ACK", "FIN", "XMAS", "UDP",
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};
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for (uint16_t i = 0; i < 50; i++) {
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printf("%d: ", i + 1);
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for (e_scantype type = SCAN_NULL; type < SCAN_ALL; type++) {
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printf("%s(%s) ", types_str[type],
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states_str[responses[i].states[type]]);
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}
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printf("\n");
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}
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return 0;
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}
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int main(int ac, char **av)
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{
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if (ac < 2) {
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dprintf(2, "Usage: ft_nmap [Scan Type(s)] [Options] {target "
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"specification}\n");
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print_usage();
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return 0;
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}
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struct option_lst *options = parse_options(ac, av);
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if (options == NULL)
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return 1;
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char *host = get_option_arg(options, FL_IP);
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if (host) {
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int rv = scan_host(host, options);
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free_options(options);
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return rv;
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}
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const char *hosts_path = get_option_arg(options, FL_FILE);
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if (!hosts_path) {
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dprintf(2, "ft_nmap: address/hostname required\n");
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goto error;
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}
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FILE *hosts_file = fopen(hosts_path, "r");
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if (hosts_file == NULL) {
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dprintf(2, "ft_nmap: unable to open file '%s'\n", hosts_path);
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goto error;
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}
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char line[256];
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while (fgets(line, sizeof(line), hosts_file)) {
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if (scan_host(line, options) < 0) {
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fclose(hosts_file);
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goto error;
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}
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}
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fclose(hosts_file);
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free_options(options);
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return EXIT_SUCCESS;
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error:
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free_options(options);
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return EXIT_FAILURE;
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}
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