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參考資源
這是 ESP8266 一個很有趣的應用
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Arduino
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#include <ESP8266WiFi.h> //more about beacon frames https://mrncciew.com/2014/10/08/802-11-mgmt-beacon-frame/ extern "C" { #include "user_interface.h" } void setup() { delay(500); wifi_set_opmode(STATION_MODE); wifi_promiscuous_enable(1); } void loop() { //sendBeacon("test"); //sends beacon frames with the SSID 'test' //sendRandomBeacon(10); //sends beacon frames with 10 character long random SSID //sendFuzzedBeacon("test",10); //sends beacon frames with 10 different SSID all starting with 'test' and ending with whitespaces (spaces and/or tabs) RickRoll(); } void sendFuzzedBeacon(char* baseSsid, int nr) { int baseLen = strlen(baseSsid); int i = 0; for (int j = 0; j < 32 - baseLen; j++) { //32 is the maximum length of the SSID for (int k = 0; k < pow(2, j); k++) { int kk = k; String ssid = baseSsid; for (int l = 0; l < j; l++) { if (kk % 2 == 1) ssid += " "; //add a space else ssid += "\t"; //add a tab kk /= 2; } char charBufSsid[33]; ssid.toCharArray(charBufSsid, 33); sendBeacon(charBufSsid); if (++i >= nr) return; } } } void sendRandomBeacon(int len) { char ssid[len + 1]; randomString(len, ssid); sendBeacon(ssid); } void randomString(int len, char* ssid) { String alfa = "1234567890qwertyuiopasdfghjkklzxcvbnm QWERTYUIOPASDFGHJKLZXCVBNM_"; for (int i = 0; i < len; i++) { ssid[i] = alfa[random(65)]; } } void sendBeacon(char* ssid) { // Randomize channel // byte channel = random(1, 12); wifi_set_channel(channel); uint8_t packet[128] = { 0x80, 0x00, //Frame Control 0x00, 0x00, //Duration /*4*/ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, //Destination address /*10*/ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, //Source address - overwritten later /*16*/ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, //BSSID - overwritten to the same as the source address /*22*/ 0xc0, 0x6c, //Seq-ctl //Frame body starts here /*24*/ 0x83, 0x51, 0xf7, 0x8f, 0x0f, 0x00, 0x00, 0x00, //timestamp - the number of microseconds the AP has been active /*32*/ 0xFF, 0x00, //Beacon interval /*34*/ 0x01, 0x04, //Capability info /* SSID */ /*36*/ 0x00 }; int ssidLen = strlen(ssid); packet[37] = ssidLen; for (int i = 0; i < ssidLen; i++) { packet[38 + i] = ssid[i]; } uint8_t postSSID[13] = {0x01, 0x08, 0x82, 0x84, 0x8b, 0x96, 0x24, 0x30, 0x48, 0x6c, //supported rate 0x03, 0x01, 0x04 /*DSSS (Current Channel)*/ }; for (int i = 0; i < 12; i++) { packet[38 + ssidLen + i] = postSSID[i]; } packet[50 + ssidLen] = channel; // Randomize SRC MAC packet[10] = packet[16] = random(256); packet[11] = packet[17] = random(256); packet[12] = packet[18] = random(256); packet[13] = packet[19] = random(256); packet[14] = packet[20] = random(256); packet[15] = packet[21] = random(256); int packetSize = 51 + ssidLen; wifi_send_pkt_freedom(packet, packetSize, 0); wifi_send_pkt_freedom(packet, packetSize, 0); wifi_send_pkt_freedom(packet, packetSize, 0); delay(1); } void RickRoll() { sendBeacon("01 少林功夫好耶"); sendBeacon("02 少林功夫真是好"); sendBeacon("03 少林功夫頂呱呱"); sendBeacon("04 我沒有鐵頭功"); sendBeacon("05 你才有鐵頭功"); sendBeacon("06 就這樣"); sendBeacon("07 湊字數"); sendBeacon("08 end"); } |
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成果
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