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#include <libwifi.h>
#include <pcap.h>
#include <bits/types/struct_timeval.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
pcap_dumper_t *filedumper = NULL;
void create_write_beacon() {
printf("[*] Creating Beacon Frame\n");
struct libwifi_beacon beacon = {0};
unsigned char transmitter[6] = {0};
libwifi_random_mac(transmitter);
unsigned char receiver[6] = "\xFF\xFF\xFF\xFF\xFF\xFF";
libwifi_create_beacon(&beacon, receiver, transmitter, "libwifi-beacon", 6);
libwifi_quick_add_tag(&beacon.tags, TAG_VENDOR_SPECIFIC,
(unsigned char *) "libwifi-tag", strlen("libwifi-tag"));
unsigned char *buf = NULL;
size_t buf_len = libwifi_get_beacon_length(&beacon);
buf = malloc(buf_len);
if (buf == NULL) {
fprintf(stderr, "[!] Couldn't allocate buffer for beacon dump.\n");
exit(EXIT_FAILURE);
}
memset(buf, 0, buf_len);
libwifi_dump_beacon(&beacon, buf, buf_len);
printf("[*] Writing Beacon Frame to pcap\n");
struct pcap_pkthdr pkt_hdr = {0};
struct timeval tv = {0};
pkt_hdr.caplen = buf_len;
pkt_hdr.len = buf_len;
gettimeofday(&tv, NULL);
pkt_hdr.ts = tv;
pcap_dump((unsigned char *) filedumper, &pkt_hdr, buf);
}
void helpexit() {
fprintf(stderr, "[!] Usage: ./generate_beacon --file <file.pcap>\n");
exit(EXIT_FAILURE);
}
int main(int argc, char **argv) {
pcap_t *handle = NULL;
char errbuf[PCAP_ERRBUF_SIZE] = {0};
FILE *pcapfile = NULL;
if (argc < 2) {
helpexit();
}
if (strcmp(argv[1], "--file") == 0) {
pcapfile = fopen(argv[2], "w+");
if ((handle = pcap_open_dead(DLT_IEEE802_11, BUFSIZ)) == NULL) {
fprintf(stderr, "[!] Error opening dead capture (%s)\n", errbuf);
exit(EXIT_FAILURE);
}
if ((filedumper = pcap_dump_fopen(handle, pcapfile)) == NULL) {
fprintf(stderr, "[!] Error opening file %s (%s)\n", argv[2], errbuf);
exit(EXIT_FAILURE);
}
} else {
helpexit();
}
printf("[+] Setup Complete\n");
create_write_beacon();
pcap_dump_close(filedumper);
pcap_close(handle);
return 0;
}
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