b3337c54a2
SVN-Revision: 1785
572 lines
17 KiB
C
572 lines
17 KiB
C
/*
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This file is part of Wi-viz (http://wiviz.natetrue.com).
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Wi-viz is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License v2 as published by
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the Free Software Foundation.
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Wi-viz is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Wi-viz; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <pcap.h>
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#include <signal.h>
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#define HOST_TIMEOUT 300
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#include "wl_access.h"
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#include "structs.h"
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#include "channelhopper.h"
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#ifdef WIN32
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#define OFFLINE
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#endif
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#ifndef __cplusplus
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#define __cdecl
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#endif
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#define nonzeromac(x) memcmp(x, "\0\0\0\0\0\0", 6)
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void dealWithPacket(wiviz_cfg * cfg, struct pcap_pkthdr * header, const u_char * packet);
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wiviz_host * gotHost(wiviz_cfg * cfg, u_char * mac, host_type type);
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void fprint_mac(FILE * outf, u_char * mac, char * extra);
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void print_mac(u_char * mac, char * extra);
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void print_host(FILE * outf, wiviz_host * host);
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void __cdecl signal_handler(int);
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void readWL(wiviz_cfg * cfg);
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void reloadConfig();
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wiviz_cfg * global_cfg;
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////////////////////////////////////////////////////////////////////////////////
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int main(int argc, char * * argv) {
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pcap_t *handle;
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char *dev;
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char errbuf[PCAP_ERRBUF_SIZE];
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int stop = 0;
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int oldMonitor, newMonitor;
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struct pcap_pkthdr header;
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const u_char *packet;
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wiviz_cfg cfg;
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int i;
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int defaultHopSeq[] = { 1, 3, 6, 8, 11 };
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global_cfg = &cfg;
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signal(SIGUSR1, &signal_handler);
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signal(SIGUSR2, &signal_handler);
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fprintf(stderr, "Wi-Viz infogathering daemon by Nathan True\n");
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memset(&cfg, 0, sizeof(wiviz_cfg));
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cfg.numHosts = 0;
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cfg.lastKeepAlive = time(NULL);
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cfg.channelHopping = 0;
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cfg.channelDwellTime = 1000;
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cfg.channelHopSeqLen = 5;
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memcpy(cfg.channelHopSeq, defaultHopSeq, sizeof(defaultHopSeq));
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wl_ioctl(WL_DEVICE, WLC_GET_MAGIC, &i, 4);
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if (i != WLC_IOCTL_MAGIC) {
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fprintf(stderr, "Wireless magic not correct, not querying wl for info\n");
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cfg.readFromWl = 0;
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}
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else {
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cfg.readFromWl = 1;
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wl_ioctl(WL_DEVICE, WLC_GET_MONITOR, &oldMonitor, 4);
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newMonitor = 1;
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wl_ioctl(WL_DEVICE, WLC_SET_MONITOR, &newMonitor, 4);
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}
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reloadConfig();
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#ifndef OFFLINE
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dev = "prism0";
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handle = pcap_open_live(dev, BUFSIZ, 1, 0, errbuf);
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#else
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dev = "c:\\cifsroot\\wdump2.pcap";
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handle = pcap_open_offline(dev, errbuf);
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#endif
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if (cfg.readFromWl) {
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readWL(&cfg);
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}
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if (!handle) {
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fprintf(stderr, "Failure to open pcap!\nErr=%s\n", errbuf);
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return -1;
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}
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while (!stop) {
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packet = pcap_next(handle, &header);
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if (!packet) break;
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dealWithPacket(&cfg, &header, packet);
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if (time(NULL) - cfg.lastKeepAlive > 30) stop = 1;
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}
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signal_handler(SIGUSR1);
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if (cfg.channelHopperPID) kill(cfg.channelHopperPID, SIGKILL);
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for (i = 0; i < MAX_HOSTS; i++) {
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print_host(stderr, cfg.hosts + i);
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if (cfg.hosts[i].occupied) printf("\n");
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if (cfg.hosts[i].apInfo) free(cfg.hosts[i].apInfo);
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if (cfg.hosts[i].staInfo) free(cfg.hosts[i].staInfo);
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}
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wl_ioctl(WL_DEVICE, WLC_SET_MONITOR, &oldMonitor, 4);
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pcap_close(handle);
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return 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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void writeJavascript() {
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int i;
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FILE * outf;
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wiviz_host * h;
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outf = fopen("/tmp/wiviz-pipe", "w");
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if (!outf) {
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fprintf(stderr, "Failure to open output file\n");
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return;
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}
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global_cfg->lastKeepAlive = time(NULL);
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if(global_cfg->readFromWl) readWL(global_cfg);
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fprintf(outf, "top.hosts = new Array(\n");
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for (i = 0; i < MAX_HOSTS; i++) {
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h = global_cfg->hosts + i;
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if (h->occupied == 0) continue;
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if (time(NULL) - h->lastSeen > HOST_TIMEOUT) {
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h->occupied = 0;
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}
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fprintf(outf, " new Array(");
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print_host(outf, h);
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fprintf(outf, "),\n");
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}
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fprintf(outf, "new Array());\n");
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fprintf(outf, "var cfg_string = 'channel-");
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if (global_cfg->channelHopping) {
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fprintf(outf, "hopping");
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}
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else {
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fprintf(outf, "%i", global_cfg->curChannel);
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}
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fprintf(outf, "';\ntop.wiviz_callback(top.hosts, cfg_string);\n");
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fclose(outf);
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}
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////////////////////////////////////////////////////////////////////////////////
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void reloadConfig() {
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FILE * cnf;
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wiviz_cfg * cfg = global_cfg;
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char filebuffer[512];
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char * fbptr, * p, * v, * vv;
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int fblen, val;
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int hopCfgChanged = 0;
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int newHopSeq[12];
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int newHopSeqLen = 0;
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fprintf(stderr, "Loading config file\n");
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cnf = fopen("/tmp/wiviz-cfg", "r");
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if (!cnf) {
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fprintf(stderr, "Wiviz: No config file (/tmp/wiviz-cfg) present, using defaults\n");
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return;
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}
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fblen = fread(filebuffer, 1, 512, cnf);
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fclose(cnf);
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if (fblen >= 512) {
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fprintf(stderr, "Error reading config file\n");
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return;
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}
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filebuffer[fblen] = 0;
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fprintf(stderr, "Read %i bytes from config file\n", fblen);
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fbptr = filebuffer;
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while (fbptr < filebuffer + fblen && *fbptr != 0) {
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p = fbptr;
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//Find end of parameter
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for (; *fbptr != '=' && *fbptr != 0; fbptr++);
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*fbptr = 0;
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v = ++fbptr;
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//Find end of value
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for (; *fbptr != '&' && *fbptr != 0; fbptr++);
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*(fbptr++) = 0;
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fprintf(stderr, "Config: %s=%s\n", p, v);
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//Apply configuration
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if (!strcmp(p, "channelsel")) {
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//Channel selector
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cfg->channelHopping = 0;
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if (!strcmp(v, "hop")) {
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//Set channel hopping
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cfg->channelHopping = 1;
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hopCfgChanged = 1;
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}
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else if (!strcmp(v, "nochange")) {
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//Don't change anything, read channel from wireless card
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readWL(cfg);
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}
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else {
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val = atoi(v);
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if (val < 1 || val > 14) {
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fprintf(stderr, "Channel setting in config file invalid (%i)\n", cfg->curChannel);
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}
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else {
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cfg->curChannel = val;
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if (cfg->readFromWl) {
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if (wl_ioctl(WL_DEVICE, WLC_SET_CHANNEL, &cfg->curChannel, 4) < 0) {
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fprintf(stderr, "Channel set to %i failed\n", cfg->curChannel);
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}
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}
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else {
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fprintf(stderr, "Can't set channel, no Broadcom wireless device present\n");
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}
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}
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}
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}
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if (!strcmp(p, "hopdwell")) {
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val = atoi(v);
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if (val < 100) val = 100;
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if (val > 30000) val = 30000;
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if (cfg->channelDwellTime != val) hopCfgChanged = 1;
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cfg->channelDwellTime = val;
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}
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if (!strcmp(p, "hopseq")) {
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cfg->channelHopSeqLen = 0;
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while (v < fbptr) {
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for (vv = v; *vv != ',' && *vv != 0; vv++);
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if (*vv == 0) {
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cfg->channelHopSeq[cfg->channelHopSeqLen++] = atoi(v);
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break;
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}
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*vv = 0;
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cfg->channelHopSeq[cfg->channelHopSeqLen++] = atoi(v);
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v = vv + 1;
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}
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}
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/*
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if (!strcmp(p, "")) {
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}
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*/
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}
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//Apply channel hopper settings
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if (cfg->channelHopping == 0 && cfg->channelHopperPID) {
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kill(cfg->channelHopperPID, SIGKILL);
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cfg->channelHopperPID = 0;
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}
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if (cfg->channelHopping == 1 && hopCfgChanged) {
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if (cfg->channelHopperPID) kill(cfg->channelHopperPID, SIGKILL);
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if ((cfg->channelHopperPID = fork()) == 0) {
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channelHopper(cfg);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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void __cdecl signal_handler(int signum) {
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if (signum == SIGUSR1) writeJavascript();
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if (signum == SIGUSR2) reloadConfig();
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}
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////////////////////////////////////////////////////////////////////////////////
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void dealWithPacket(wiviz_cfg * cfg, struct pcap_pkthdr * header, const u_char * packet) {
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ieee802_11_hdr * hWifi;
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prism_hdr * hPrism;
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wiviz_host * host;
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wiviz_host * emergebss;
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host_type type = typeUnknown;
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int wfType;
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int rssi = 0;
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int to_ds, from_ds;
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prism_did * i;
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ieee_802_11_tag * e;
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ieee_802_11_mgt_frame * m;
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char * src = "\0\0\0\0\0\0";
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char * dst = "\0\0\0\0\0\0";
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char * bss = "\0\0\0\0\0\0";
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char * ssid = "";
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int channel = 0;
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int adhocbeacon = 0;
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u_char ssidlen = 0;
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ap_enc_type encType = aetUnknown;
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if (!packet) return;
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if (header->len < sizeof(prism_hdr) + sizeof(ieee802_11_hdr)) return;
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hPrism = (prism_hdr *) packet;
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hWifi = (ieee802_11_hdr *) (packet + (hPrism->msg_length));
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//Parse the prism DIDs
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i = (prism_did *)((char *)hPrism + sizeof(prism_hdr));
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while ((int)i < (int)hWifi) {
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if (i->did == pdn_rssi) rssi = *(int *)(i+1);
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i = (prism_did *) ((int)(i+1) + i->length);
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}
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//Establish the frame type
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wfType = ((hWifi->frame_control & 0xF0) >> 4) + ((hWifi->frame_control & 0xC) << 2);
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switch (wfType) {
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case mgt_assocRequest:
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case mgt_reassocRequest:
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case mgt_probeRequest:
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type = typeSta;
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src=hWifi->addr2;
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dst=hWifi->addr1;
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break;
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case mgt_assocResponse:
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case mgt_reassocResponse:
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case mgt_probeResponse:
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case mgt_beacon:
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src=hWifi->addr2;
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dst=hWifi->addr1;
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bss=hWifi->addr3;
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type = typeAP;
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break;
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}
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to_ds = hWifi->flags & IEEE80211_TO_DS;
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from_ds = hWifi->flags & IEEE80211_FROM_DS;
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if ((wfType & 0xF0) == 0x20 && (wfType & 0xF) < 4) {
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//Data frame
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src=hWifi->addr2;
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dst=hWifi->addr1;
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if (!from_ds) type = typeSta;
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else type = typeAP;
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if (!to_ds && !from_ds) bss = hWifi->addr3;
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if (to_ds && !from_ds) bss = hWifi->addr1;
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if (!to_ds && from_ds) bss = hWifi->addr2;
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}
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if (type == typeUnknown) return;
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//Parse the 802.11 tags
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if (wfType == mgt_probeResponse || wfType == mgt_beacon) {
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m = (ieee_802_11_mgt_frame *) (hWifi + 1);
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if (m->caps & MGT_CAPS_IBSS) {
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type = typeSta;
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adhocbeacon = 1;
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}
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if (m->caps & MGT_CAPS_WEP) encType = aetEncWEP;
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else encType = aetUnencrypted;
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e = (ieee_802_11_tag *) ((int) m + sizeof(ieee_802_11_mgt_frame));
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while ((u_int)e < (u_int)packet + header->len) {
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if (e->tag == tagSSID) {
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ssidlen = e->length;
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ssid = (char *)(e + 1);
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}
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if (e->tag == tagChannel) {
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channel = *(char *)(e + 1);
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}
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if (e->tag == tagVendorSpecific) {
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if (e->length >= 4 && memcmp(e + 1, "\x00\x50\xf2\x01", 4) == 0) {
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//WPA encryption
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encType = aetEncWPA;
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}
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}
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e = (ieee_802_11_tag *) ((int)(e + 1) + e->length);
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}
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}
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//Look up the host in the hash table
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host = gotHost(cfg, src, type);
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//Add any info we received
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if (host->RSSI) {
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host->RSSI = host->RSSI * 9 / 10 + (-rssi * 10);
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}
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else {
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host->RSSI = -rssi * 100;
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}
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if (type == typeSta) {
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if (nonzeromac(bss)) {
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memcpy(host->staInfo->connectedBSSID, bss, 6);
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host->staInfo->state = ssAssociated;
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emergebss = gotHost(cfg, bss, typeAP);
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if (emergebss->RSSI == 0) emergebss->RSSI = 10000;
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memcpy(emergebss->apInfo->bssid, bss, 6);
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if (adhocbeacon) {
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emergebss->type = typeAdhocHub;
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if (ssidlen > 0 && ssidlen <= 32) {
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memcpy(emergebss->apInfo->ssid, ssid, ssidlen);
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emergebss->apInfo->ssidlen = ssidlen;
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}
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if (channel) emergebss->apInfo->channel = channel;
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emergebss->apInfo->flags = hWifi->flags;
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emergebss->RSSI = host->RSSI;
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if (encType != aetUnknown) emergebss->apInfo->encryption = encType;
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}
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}
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if (wfType == mgt_probeRequest && host->staInfo->state == ssUnknown) host->staInfo->state = ssUnassociated;
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}
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if (type == typeAP) {
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if (nonzeromac(bss)) {
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memcpy(host->apInfo->bssid, bss, 6);
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}
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if (ssidlen > 0 && ssidlen <= 32) {
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memcpy(host->apInfo->ssid, ssid, ssidlen);
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host->apInfo->ssidlen = ssidlen;
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}
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if (channel) host->apInfo->channel = channel;
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host->apInfo->flags = hWifi->flags;
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if (encType != aetUnknown) host->apInfo->encryption = encType;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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void print_mac(u_char * mac, char * extra) {
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fprint_mac(stdout, mac, extra);
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}
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////////////////////////////////////////////////////////////////////////////////
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void fprint_mac(FILE * outf, u_char * mac, char * extra) {
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fprintf(outf, "%02X:%02X:%02X:%02X:%02X:%02X%s",
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mac[0] & 0xFF,
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mac[1] & 0xFF,
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mac[2] & 0xFF,
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mac[3] & 0xFF,
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mac[4] & 0xFF,
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mac[5] & 0xFF,
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extra);
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}
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////////////////////////////////////////////////////////////////////////////////
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#define MAX_PROBES MAX_HOSTS/2
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wiviz_host * gotHost(wiviz_cfg * cfg, u_char * mac, host_type type) {
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int i = (mac[5] + (mac[4] << 8)) % MAX_HOSTS;
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int c = 0;
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wiviz_host * h = cfg->hosts + i;
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while (h->occupied && memcmp(h->mac, mac, 6)) {
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i++; h++; c++;
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if (i >= MAX_HOSTS) {
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i = 0;
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h = cfg->hosts;
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}
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if (c > MAX_PROBES) break;
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}
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if (!h->occupied) {
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fprintf(stderr, "New host, ");
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fprint_mac(stderr, mac, ", type=");
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fprintf(stderr, "%s\n", (type==typeAP) ? "AP" : ((type==typeSta) ? "Sta" : "Unk"));
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}
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h->occupied = 1;
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h->lastSeen = time(NULL);
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h->type = type;
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memcpy(h->mac, mac, 6);
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if (h->type == typeAP && !h->apInfo) {
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h->apInfo = (ap_info *) malloc(sizeof(ap_info));
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memset(h->apInfo, 0, sizeof(ap_info));
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}
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if (h->type == typeSta && !h->staInfo) {
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h->staInfo = (sta_info *) malloc(sizeof(sta_info));
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memset(h->staInfo, 0, sizeof(sta_info));
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}
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return h;
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}
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////////////////////////////////////////////////////////////////////////////////
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void print_host(FILE * outf, wiviz_host * host) {
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int i;
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if (!host->occupied) return;
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fprintf(outf, "'");
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fprint_mac(outf, host->mac, "'");
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fprintf(outf, ", -%i, '", host->RSSI / 100);
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switch (host->type) {
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case typeAP: fprintf(outf, "ap"); break;
|
|
case typeSta: fprintf(outf, "sta"); break;
|
|
case typeAdhocHub: fprintf(outf, "adhoc"); break;
|
|
}
|
|
if (host->type == typeSta) {
|
|
switch(host->staInfo->state) {
|
|
case ssAssociated:
|
|
fprintf(outf, "-assoc-");
|
|
fprint_mac(outf, host->staInfo->connectedBSSID, "");
|
|
break;
|
|
case ssUnassociated:
|
|
fprintf(outf, "-unassoc");
|
|
}
|
|
}
|
|
if (host->type == typeAP || host->type == typeAdhocHub) {
|
|
fprintf(outf, "-channel-%i-ssid-", host->apInfo->channel & 0xFF);
|
|
for (i = 0; i < host->apInfo->ssidlen; i++) {
|
|
fprintf(outf, "\\x%02X", *((char *)host->apInfo->ssid + i) & 0xFF);
|
|
}
|
|
switch (host->apInfo->encryption) {
|
|
case aetUnknown: fprintf(outf, "-?enc-?alg"); break;
|
|
case aetUnencrypted: fprintf(outf, "-unenc-na"); break;
|
|
case aetEncUnknown: fprintf(outf, "-enc-unknown"); break;
|
|
case aetEncWEP: fprintf(outf, "-enc-wep"); break;
|
|
case aetEncWPA: fprintf(outf, "-enc-wpa"); break;
|
|
}
|
|
}
|
|
fprintf(outf, "', %i", time(0) - host->lastSeen);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
#define MAX_STA_COUNT 64
|
|
void readWL(wiviz_cfg * cfg) {
|
|
int ap, i;
|
|
wiviz_host * host, * sta;
|
|
uchar mac[6];
|
|
wlc_ssid_t ssid;
|
|
channel_info_t channel;
|
|
maclist_t * macs;
|
|
sta_rssi_t starssi;
|
|
|
|
get_mac(WL_DEVICE, mac);
|
|
printf("AP mac: ");
|
|
print_mac(mac, "\n");
|
|
if (!nonzeromac(mac)) return;
|
|
wl_ioctl(WL_DEVICE, WLC_GET_AP, &ap, 4);
|
|
if (ap) {
|
|
host = gotHost(cfg, mac, typeAP);
|
|
wl_ioctl(WL_DEVICE, WLC_GET_BSSID, host->apInfo->bssid, 6);
|
|
wl_ioctl(WL_DEVICE, WLC_GET_SSID, &ssid, sizeof(wlc_ssid_t));
|
|
memcpy(host->apInfo->ssid, ssid.SSID, 32);
|
|
host->apInfo->ssidlen = ssid.SSID_len;
|
|
host->RSSI = 0;
|
|
wl_ioctl(WL_DEVICE, WLC_GET_CHANNEL, &channel, sizeof(channel_info_t));
|
|
host->apInfo->channel = channel.hw_channel;
|
|
macs = (maclist_t *) malloc(4 + MAX_STA_COUNT * sizeof(ether_addr_t));
|
|
macs->count = MAX_STA_COUNT;
|
|
if (wl_ioctl(WL_DEVICE, WLC_GET_ASSOCLIST, macs, 4 + MAX_STA_COUNT * sizeof(ether_addr_t)) > -1) {
|
|
for (i = 0; i < macs->count; i++) {
|
|
sta = gotHost(cfg, (char *)&macs->ea[i], typeSta);
|
|
memcpy(starssi.mac, &macs->ea[i], 6);
|
|
starssi.RSSI = 3000;
|
|
starssi.zero_ex_forty_one = 0x41;
|
|
if (wl_ioctl(WL_DEVICE, WLC_GET_RSSI, &starssi, 12) < 0) printf("rssifail\n");
|
|
sta->RSSI = -starssi.RSSI * 100;
|
|
sta->staInfo->state = ssAssociated;
|
|
memcpy(sta->staInfo->connectedBSSID, host->apInfo->bssid, 6);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
host = gotHost(cfg, mac, typeSta);
|
|
host->RSSI = 0;
|
|
if (wl_ioctl(WL_DEVICE, WLC_GET_BSSID, &host->staInfo->connectedBSSID, 6) < 0) {
|
|
host->staInfo->state = ssUnassociated;
|
|
}
|
|
else {
|
|
host->staInfo->state = ssAssociated;
|
|
}
|
|
}
|
|
if (wl_ioctl(WL_DEVICE, WLC_GET_CHANNEL, &channel, sizeof(channel_info_t)) >= 0) {
|
|
cfg->curChannel = channel.hw_channel;
|
|
fprintf(stderr, "Current channel is %i\n", cfg->curChannel);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|