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<!DOCTYPE html>
<html dir="ltr" lang="en">
    <head>
        <meta charset='utf-8'>
        <title>Network Tools</title>
    </head>
    <body>

        <a href="index.html">Tools Index</a>

        <h1>Network Tools</h1>

        <p>This document and others under tools extend
        <a href="../core/network.html">core network</a>
        witch allow to connect to the internet in the most
        common environments. Follow documents allow to configure
        tap interfaces for virtual machines, audit network,
        dns cache and encryption, etc.</p>

        <p>On core is configured a sub-domain from
        <a href="http://freedns.afraid.org">afraid.org</a>,
        <a href="https://freedns.afraid.org/dynamic/v2/">generate cron job</a>
        to update ip every 5 minutes, check
        <a href="https://freedns.afraid.org/dynamic/v2/tips/">about dynamic interface</a>. To run as system cron job add as root and remove path line from example;</p>
        <pre>
        # crontab -e
        </pre>

        <p>Example from afraid uses curl and will log output to /tmp/freedns*,
        change to /var/log/freedns</p>

        <h2 id="bridge">Bridges</h2>

        <p>For more information about bridges read
        <a href="http://ebtables.netfilter.org/br_fw_ia/br_fw_ia.html#section7">bridges with iptables</a>.
        Script <a href="conf/etc/rc.d/blan">/etc/rc.d/blan</a> creates br0 bridge interface
        with 10.0.0.1 ip. Number of tap interfaces created and attached depends on number
        of cpu cores available. Ethernet interface is added to the bridge. Edit /etc/rc.conf
        to setup interfaces at startup;</p>

        <pre>
        #
        # /etc/rc.conf: system configuration
        #

        FONT=default
        KEYMAP=dvorak
        TIMEZONE="Europe/Lisbon"
        HOSTNAME=machine
        SYSLOG=sysklogd
        SERVICES=(lo iptables wlan blan crond)

        # End of file
        </pre>

        <p>Change iptables init script
        <a href="../core/conf/rc.d/iptables">/etc/rc.d/iptables</a>
        to load new rules from
        <a href="../core/conf/iptables/br-lan.v4">/etc/iptables/br-lan.v4</a>.
        Now change <a href="../core/scripts/iptables-br.sh">iptables-br.sh</a>
        with your network configuration and run;
        </p>

        <pre>
        # bash core/scripts/iptables-br.sh
        </pre>

        <a href="index.html">Tools Index</a>
        <p>This is part of the Hive System Documentation.
        Copyright (C) 2018
        Hive Team.
        See the file <a href="../fdl-1.3-standalone.html">Gnu Free Documentation License</a>
        for copying conditions.</p>

    </body>
</html>
span> [Tdev] = "dev", [Tirc] = "irc", [Twww] = "www", [Twork] = "work", }; /********** CUSTOMIZE **********/ /* X structs */ Display *dpy; Window root, barwin; Atom wm_atom[WMLast], net_atom[NetLast]; Cursor cursor[CurLast]; Bool running = True; Bool issel; int tsel = Tdev; /* default tag */ int screen, sx, sy, sw, sh, mw, th; DC dc = {0}; Client *clients = NULL; Client *sel = NULL; static Bool other_wm_running; static const char version[] = "dwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n"; static int (*x_error_handler) (Display *, XErrorEvent *); static void usage() { error("usage: dwm [-v]\n"); } static void scan_wins() { unsigned int i, num; Window *wins; XWindowAttributes wa; Window d1, d2; if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) { for(i = 0; i < num; i++) { if(!XGetWindowAttributes(dpy, wins[i], &wa)) continue; if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1)) continue; if(wa.map_state == IsViewable) manage(wins[i], &wa); } } if(wins) XFree(wins); } static int win_property(Window w, Atom a, Atom t, long l, unsigned char **prop) { Atom real; int format; unsigned long res, extra; int status; status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format, &res, &extra, prop); if(status != Success || *prop == 0) { return 0; } if(res == 0) { free((void *) *prop); } return res; } int win_proto(Window w) { unsigned char *protocols; long res; int protos = 0; int i; res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L, &protocols); if(res <= 0) { return protos; } for(i = 0; i < res; i++) { if(protocols[i] == wm_atom[WMDelete]) protos |= WM_PROTOCOL_DELWIN; } free((char *) protocols); return protos; } void send_message(Window w, Atom a, long value) { XEvent e; e.type = ClientMessage; e.xclient.window = w; e.xclient.message_type = a; e.xclient.format = 32; e.xclient.data.l[0] = value; e.xclient.data.l[1] = CurrentTime; XSendEvent(dpy, w, False, NoEventMask, &e); XFlush(dpy); } /* * There's no way to check accesses to destroyed windows, thus * those cases are ignored (especially on UnmapNotify's). * Other types of errors call Xlib's default error handler, which * calls exit(). */ int error_handler(Display *dpy, XErrorEvent *error) { if(error->error_code == BadWindow || (error->request_code == X_SetInputFocus && error->error_code == BadMatch) || (error->request_code == X_PolyText8 && error->error_code == BadDrawable) || (error->request_code == X_PolyFillRectangle && error->error_code == BadDrawable) || (error->request_code == X_PolySegment && error->error_code == BadDrawable) || (error->request_code == X_ConfigureWindow && error->error_code == BadMatch) || (error->request_code == X_GrabKey && error->error_code == BadAccess)) return 0; fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n", error->request_code, error->error_code); return x_error_handler(dpy, error); /* may call exit() */ } /* * Startup Error handler to check if another window manager * is already running. */ static int startup_error_handler(Display *dpy, XErrorEvent *error) { other_wm_running = True; return -1; } static void cleanup() { while(sel) { resize(sel); unmanage(sel); } XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime); } void quit(Arg *arg) { running = False; } int main(int argc, char *argv[]) { int i; XSetWindowAttributes wa; unsigned int mask; Window w; XEvent ev; /* command line args */ for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) { switch (argv[i][1]) { case 'v': fprintf(stdout, "%s", version); exit(0); break; default: usage(); break; } } dpy = XOpenDisplay(0); if(!dpy) error("dwm: cannot connect X server\n"); screen = DefaultScreen(dpy); root = RootWindow(dpy, screen); /* check if another WM is already running */ other_wm_running = False; XSetErrorHandler(startup_error_handler); /* this causes an error if some other WM is running */ XSelectInput(dpy, root, SubstructureRedirectMask); XFlush(dpy); if(other_wm_running) error("dwm: another window manager is already running\n"); sx = sy = 0; sw = DisplayWidth(dpy, screen); sh = DisplayHeight(dpy, screen); mw = (sw * MASTERW) / 100; issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask); XSetErrorHandler(0); x_error_handler = XSetErrorHandler(error_handler); /* init atoms */ wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False); wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False); net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False); net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False); XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32, PropModeReplace, (unsigned char *) net_atom, NetLast); /* init cursors */ cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr); cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing); cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur); update_keys(); /* style */ dc.bg = initcolor(BGCOLOR); dc.fg = initcolor(FGCOLOR); dc.border = initcolor(BORDERCOLOR); initfont(FONT); th = dc.font.height + 4; dc.drawable = XCreatePixmap(dpy, root, sw, th, DefaultDepth(dpy, screen)); dc.gc = XCreateGC(dpy, root, 0, 0); wa.event_mask = SubstructureRedirectMask | EnterWindowMask \ | LeaveWindowMask; wa.cursor = cursor[CurNormal]; XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa); scan_wins(); while(running) { XNextEvent(dpy, &ev); if(handler[ev.type]) (handler[ev.type])(&ev); /* call handler */ } cleanup(); XCloseDisplay(dpy); return 0; }