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lorcon_forge.c
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/*
This file is part of lorcon
lorcon is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
lorcon is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with lorcon; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Copyright (c) 2005 dragorn and Joshua Wright
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#include <string.h>
/* #include <netinet/in.h> */
#include <stdlib.h>
#include <stdio.h>
#include "lorcon.h"
#include "lorcon_packasm.h"
#include "lorcon_endian.h"
#include "lorcon_forge.h"
#include "ieee80211.h"
uint8_t *ouilist[] = {
(uint8_t *) "\x00\x01\x03", (uint8_t *) "\x00\x01\x24",
(uint8_t *) "\x00\x02\x2D", (uint8_t *) "\x00\x02\x6F",
(uint8_t *) "\x00\x02\xA5", (uint8_t *) "\x00\x03\x2F",
(uint8_t *) "\x00\x04\x3A", (uint8_t *) "\x00\x04\x5A",
(uint8_t *) "\x00\x04\x75", (uint8_t *) "\x00\x04\xE2",
(uint8_t *) "\x00\x05\x5D", (uint8_t *) "\x00\x06\x25",
(uint8_t *) "\x00\x07\x0E", (uint8_t *) "\x00\x07\x50",
(uint8_t *) "\x00\x08\x21", (uint8_t *) "\x00\x09\x43",
(uint8_t *) "\x00\x09\x5B", (uint8_t *) "\x00\x09\x7C",
(uint8_t *) "\x00\x09\x92", (uint8_t *) "\x00\x09\xE8",
(uint8_t *) "\x00\x0A\x41", (uint8_t *) "\x00\x0A\x8A",
(uint8_t *) "\x00\x0C\x41", (uint8_t *) "\x00\x0D\x88",
(uint8_t *) "\x00\x30\x65", (uint8_t *) "\x00\x30\xAB",
(uint8_t *) "\x00\x30\xBD", (uint8_t *) "\x00\x40\x05",
(uint8_t *) "\x00\x40\x26", (uint8_t *) "\x00\x40\x96",
(uint8_t *) "\x00\x50\x08", (uint8_t *) "\x00\x50\x8B",
(uint8_t *) "\x00\x50\xDA", (uint8_t *) "\x00\x50\xF2",
(uint8_t *) "\x00\x60\x01", (uint8_t *) "\x00\x60\x1D",
(uint8_t *) "\x00\x60\x6D", (uint8_t *) "\x00\x60\xB3",
(uint8_t *) "\x00\x80\x37", (uint8_t *) "\x00\x80\xC6",
(uint8_t *) "\x00\x80\xC8", (uint8_t *) "\x00\x90\x4B",
(uint8_t *) "\x00\x90\xD1", (uint8_t *) "\x00\xA0\x04",
(uint8_t *) "\x00\xA0\xF8", (uint8_t *) "\x00\xE0\x29",
(uint8_t *) "\x08\x00\x46", NULL
};
void lcpf_randmac(uint8_t *addr, int valid) {
static int listlen = 0;
if (listlen == 0) {
while (ouilist[listlen] != NULL) {
listlen++;
};
}
if (valid) {
memcpy(addr, ouilist[rand() % listlen], 3);
} else {
addr[0] = rand() % 255;
addr[1] = rand() % 255;
addr[2] = rand() % 255;
}
addr[3] = rand() % 255;
addr[4] = rand() % 255;
addr[5] = rand() % 255;
}
void lcpf_qosheaders(struct lcpa_metapack *pack, unsigned int priority,
unsigned int eosp, unsigned int ackpol) {
uint8_t chunk[2];
/* Bits 0 and 4 are reserved. */
chunk[0] = 0;
chunk[0] = ((priority << 5) | (eosp << 3) | (ackpol << 1));
/* All 8 bits reserved */
chunk[1] = 0;
pack = lcpa_append_copy(pack, "80211QOSHDR", 2, chunk);
}
void lcpf_80211ctrlheaders(struct lcpa_metapack *pack,
unsigned int type, unsigned int subtype, unsigned int fcflags,
unsigned int duration, uint8_t *mac1)
{
/* Re-use a single buffer and use the copy ops, saves a malloc
* thrash */
uint8_t chunk[2];
uint16_t *sixptr;
chunk[0] = ((type << 2) | (subtype << 4));
chunk[1] = (uint8_t) fcflags;
pack = lcpa_append_copy(pack, "80211FC", 2, chunk);
sixptr = (uint16_t *) chunk;
*sixptr = lorcon_hton16((uint16_t) duration);
pack = lcpa_append_copy(pack, "80211DUR", 2, chunk);
if (mac1 != NULL) {
pack = lcpa_append_copy(pack, "80211MAC1", 6, mac1);
}
return;
}
void lcpf_data(struct lcpa_metapack *pack, unsigned int fcflags,
unsigned int duration, uint8_t *mac1, uint8_t *mac2,
uint8_t *mac3, uint8_t *mac4, unsigned int fragment,
unsigned int sequence) {
lcpf_80211headers(pack, WLAN_FC_TYPE_DATA, WLAN_FC_SUBTYPE_DATA,
fcflags, duration, mac1, mac2, mac3, mac4, fragment, sequence);
}
void lcpf_qos_data(struct lcpa_metapack *pack, unsigned int fcflags,
unsigned int duration, uint8_t *mac1, uint8_t *mac2,
uint8_t *mac3, uint8_t *mac4, unsigned int fragment,
unsigned int sequence) {
lcpf_80211headers(pack, WLAN_FC_TYPE_DATA, WLAN_FC_SUBTYPE_QOSDATA,
fcflags, duration, mac1, mac2, mac3, mac4, fragment, sequence);
}
void lcpf_80211headers(struct lcpa_metapack *pack, unsigned int type,
unsigned int subtype, unsigned int fcflags,
unsigned int duration,
uint8_t *mac1, uint8_t *mac2, uint8_t *mac3,
uint8_t *mac4, unsigned int fragment,
unsigned int sequence) {
/* Re-use a single buffer and use the copy ops, saves a malloc
* thrash */
uint8_t chunk[2];
uint16_t *sixptr;
chunk[0] = ((type << 2) | (subtype << 4));
chunk[1] = (uint8_t) fcflags;
pack = lcpa_append_copy(pack, "80211FC", 2, chunk);
sixptr = (uint16_t *) chunk;
*sixptr = lorcon_hton16((uint16_t) duration);
pack = lcpa_append_copy(pack, "80211DUR", 2, chunk);
if (mac1 != NULL)
pack = lcpa_append_copy(pack, "80211MAC1", 6, mac1);
if (mac2 != NULL)
pack = lcpa_append_copy(pack, "80211MAC2", 6, mac2);
if (mac3 != NULL)
pack = lcpa_append_copy(pack, "80211MAC3", 6, mac3);
*sixptr = ((sequence << 4) | fragment);
pack = lcpa_append_copy(pack, "80211FRAGSEQ", 2, chunk);
if (mac4 != NULL)
pack = lcpa_append_copy(pack, "80211MAC4", 6, mac4);
}
void lcpf_beacon(struct lcpa_metapack *pack, uint8_t *src, uint8_t *bssid,
int framecontrol, int duration, int fragment, int sequence,
uint64_t timestamp, int beacon, int capabilities) {
uint8_t chunk[8];
uint16_t *sixptr = (uint16_t *) chunk;
uint64_t *ch64 = (uint64_t *) chunk;
memcpy(chunk, "\xFF\xFF\xFF\xFF\xFF\xFF", 6);
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_BEACON, framecontrol, duration,
chunk, src, bssid, NULL,
fragment, sequence);
*ch64 = timestamp;
pack = lcpa_append_copy(pack, "BEACONBSSTIME", 8, chunk);
*sixptr = beacon;
pack = lcpa_append_copy(pack, "BEACONINT", 2, chunk);
*sixptr = capabilities;
pack = lcpa_append_copy(pack, "BEACONCAP", 2, chunk);
}
void lcpf_add_ie(struct lcpa_metapack *pack, uint8_t num, uint8_t len, uint8_t *data) {
uint8_t chunk[257];
chunk[0] = num;
chunk[1] = len;
memcpy(&(chunk[2]), data, len);
lcpa_append_copy(pack, "IETAG", len + 2, chunk);
}
void lcpf_deauth(struct lcpa_metapack *pack, uint8_t *src, uint8_t *dst,
uint8_t *bssid, int framecontrol,
int duration, int fragment,
int sequence, int reasoncode) {
uint8_t chunk[2];
uint16_t *ch16 = (uint16_t *) chunk;
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_DEAUTH, framecontrol, duration,
dst, src, bssid, NULL, fragment, sequence);
*ch16 = reasoncode;
lcpa_append_copy(pack, "REASONCODE", 2, chunk);
}
void lcpf_disassoc(struct lcpa_metapack *pack, uint8_t *src, uint8_t *dst,
uint8_t *bssid, int framecontrol, int duration, int fragment,
int sequence, int reasoncode) {
uint8_t chunk[2];
uint16_t *ch16 = (uint16_t *) chunk;
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_DISASSOC, framecontrol, duration,
dst, src, bssid, NULL, fragment, sequence);
*ch16 = reasoncode;
lcpa_append_copy(pack, "REASONCODE", 2, chunk);
}
void lcpf_probereq(struct lcpa_metapack *pack, uint8_t *src, int framecontrol,
int duration, int fragment, int sequence) {
uint8_t chunk[6] = "\xFF\xFF\xFF\xFF\xFF\xFF";
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_PROBEREQ, framecontrol, duration,
chunk, src, chunk, NULL, fragment, sequence);
}
void lcpf_proberesp(struct lcpa_metapack *pack, uint8_t *dst, uint8_t *src,
uint8_t *bssid, int framecontrol, int duration, int fragment,
int sequence, uint64_t timestamp, int beaconint,
int capabilities)
{
uint8_t chunk[8];
uint16_t *sixptr = (uint16_t *) chunk;
uint64_t *ch64 = (uint64_t *) chunk;
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_PROBERESP, framecontrol, duration,
dst, src, bssid, NULL,
fragment, sequence);
*ch64 = timestamp;
pack = lcpa_append_copy(pack, "BEACONBSSTIME", 8, chunk);
*sixptr = beaconint;
pack = lcpa_append_copy(pack, "BEACONINT", 2, chunk);
*sixptr = capabilities;
pack = lcpa_append_copy(pack, "BEACONCAP", 2, chunk);
}
void lcpf_rts(struct lcpa_metapack *pack, uint8_t *recvmac, uint8_t *transmac,
int framecontrol, int duration)
{
lcpf_80211ctrlheaders(pack, 1, 11, framecontrol, duration, recvmac);
pack = lcpa_append_copy(pack, "TRANSMITTERMAC", 6, transmac);
}
void lcpf_authreq(struct lcpa_metapack *pack, uint8_t *dst, uint8_t *src,
uint8_t *bssid, int framecontrol, int duration, int fragment,
int sequence, uint16_t authalgo, uint16_t auth_seq,
uint16_t auth_status)
{
uint8_t chunk[2];
uint16_t *sixptr = (uint16_t *) chunk;
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_AUTH, framecontrol, duration,
dst, src, bssid, NULL,
fragment, sequence);
*sixptr = authalgo;
pack = lcpa_append_copy(pack, "AUTHALGO", 2, chunk);
*sixptr = auth_seq;
pack = lcpa_append_copy(pack, "AUTHSEQ", 2, chunk);
*sixptr = auth_status;
pack = lcpa_append_copy(pack, "AUTHSTATUS", 2, chunk);
}
/* Authentication response is the same for open networks, with IE tags */
void lcpf_authresq(struct lcpa_metapack *pack, uint8_t *dst, uint8_t *src,
uint8_t *bssid, int framecontrol, int duration, int fragment,
int sequence, uint16_t authalgo, uint16_t auth_seq,
uint16_t auth_status)
{
lcpf_authreq(pack, dst, src, bssid, framecontrol, duration, fragment,
sequence, authalgo, auth_seq, auth_status);
}
void lcpf_assocreq(struct lcpa_metapack *pack, uint8_t *dst, uint8_t *src,
uint8_t *bssid, int framecontrol, int duration, int fragment,
int sequence, uint16_t capabilities, uint16_t listenint)
{
uint8_t chunk[2];
uint16_t *sixptr = (uint16_t *) chunk;
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_ASSOCREQ, framecontrol, duration,
dst, src, bssid, NULL,
fragment, sequence);
*sixptr = capabilities;
pack = lcpa_append_copy(pack, "ASSOCREQCAPAB", 2, chunk);
*sixptr = listenint;
pack = lcpa_append_copy(pack, "ASSOCREQLI", 2, chunk);
}
void lcpf_assocresp(struct lcpa_metapack *pack, uint8_t *dst, uint8_t *src,
uint8_t *bssid, int framecontrol, int duration, int fragment,
int sequence, uint16_t capabilities, uint16_t status,
uint16_t aid)
{
uint8_t chunk[2];
uint16_t *sixptr = (uint16_t *) chunk;
lcpf_80211headers(pack, WLAN_FC_TYPE_MGMT, WLAN_FC_SUBTYPE_ASSOCRESP, framecontrol, duration,
dst, src, bssid, NULL,
fragment, sequence);
*sixptr = capabilities;
pack = lcpa_append_copy(pack, "ASSOCRESPCAPAB", 2, chunk);
*sixptr = status;
pack = lcpa_append_copy(pack, "ASSOCRESPSTAT", 2, chunk);
*sixptr = aid;
pack = lcpa_append_copy(pack, "ASSOCRESPID", 2, chunk);
}