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make dnsmasq probe for dhcp servers before starting a dhcp server
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1110 3c298f89-4303-0410-b956-a3cf2f4a3e73
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mbm
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89
openwrt/package/busybox/patches/150-udhcp-release.patch
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89
openwrt/package/busybox/patches/150-udhcp-release.patch
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@ -0,0 +1,89 @@
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diff -Nurb busybox-1.00/include/usage.h busybox-1.00-patched/include/usage.h
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--- busybox-1.00/include/usage.h 2005-05-30 05:34:45.397776704 -0400
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+++ busybox-1.00-patched/include/usage.h 2005-05-30 05:04:29.271869808 -0400
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@@ -2629,6 +2629,7 @@
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"\t-n,\t--now\tExit with failure if lease cannot be immediately negotiated.\n" \
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"\t-p,\t--pidfile=file\tStore process ID of daemon in file\n" \
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"\t-q,\t--quit\tQuit after obtaining lease\n" \
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+ "\t-R\t--release\tRelease IP on quit\n" \
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"\t-r,\t--request=IP\tIP address to request (default: none)\n" \
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"\t-s,\t--script=file\tRun file at dhcp events (default: /usr/share/udhcpc/default.script)\n" \
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"\t-v,\t--version\tDisplay version"
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diff -Nurb busybox-1.00/networking/udhcp/dhcpc.c busybox-1.00-patched/networking/udhcp/dhcpc.c
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--- busybox-1.00/networking/udhcp/dhcpc.c 2004-05-19 04:29:05.000000000 -0400
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+++ busybox-1.00-patched/networking/udhcp/dhcpc.c 2005-05-30 05:00:47.377602864 -0400
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@@ -61,6 +61,7 @@
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abort_if_no_lease: 0,
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foreground: 0,
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quit_after_lease: 0,
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+ release_on_quit: 0,
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background_if_no_lease: 0,
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interface: "eth0",
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pidfile: NULL,
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@@ -87,6 +88,7 @@
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" immediately negotiated.\n"
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" -p, --pidfile=file Store process ID of daemon in file\n"
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" -q, --quit Quit after obtaining lease\n"
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+" -R, --release Release IP on quit\n"
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" -r, --request=IP IP address to request (default: none)\n"
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" -s, --script=file Run file at dhcp events (default:\n"
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" " DEFAULT_SCRIPT ")\n"
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@@ -202,6 +204,7 @@
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{"now", no_argument, 0, 'n'},
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{"pidfile", required_argument, 0, 'p'},
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{"quit", no_argument, 0, 'q'},
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+ {"release", no_argument, 0, 'R'},
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{"request", required_argument, 0, 'r'},
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{"script", required_argument, 0, 's'},
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{"version", no_argument, 0, 'v'},
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@@ -251,6 +254,9 @@
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case 'q':
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client_config.quit_after_lease = 1;
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break;
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+ case 'R':
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+ client_config.release_on_quit = 1;
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+ break;
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case 'r':
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requested_ip = inet_addr(optarg);
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break;
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@@ -472,8 +478,11 @@
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state = BOUND;
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change_mode(LISTEN_NONE);
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- if (client_config.quit_after_lease)
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+ if (client_config.quit_after_lease) {
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+ if (client_config.release_on_quit)
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+ perform_release();
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return 0;
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+ }
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if (!client_config.foreground)
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client_background();
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@@ -498,12 +507,13 @@
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case SIGUSR1:
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perform_renew();
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break;
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- case SIGUSR2:
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- perform_release();
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- break;
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case SIGTERM:
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LOG(LOG_INFO, "Received SIGTERM");
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+ if (!client_config.release_on_quit)
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return 0;
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+ case SIGUSR2:
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+ perform_release();
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+ break;
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}
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} else if (retval == -1 && errno == EINTR) {
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/* a signal was caught */
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diff -Nurb busybox-1.00/networking/udhcp/dhcpc.h busybox-1.00-patched/networking/udhcp/dhcpc.h
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--- busybox-1.00/networking/udhcp/dhcpc.h 2004-01-30 18:45:12.000000000 -0500
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+++ busybox-1.00-patched/networking/udhcp/dhcpc.h 2005-05-30 04:53:58.681734080 -0400
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@@ -20,6 +20,7 @@
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struct client_config_t {
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char foreground; /* Do not fork */
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char quit_after_lease; /* Quit after obtaining lease */
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+ char release_on_quit; /* perform release on quit */
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char abort_if_no_lease; /* Abort if no lease */
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char background_if_no_lease; /* Fork to background if no lease */
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char *interface; /* The name of the interface to use */
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@ -12,7 +12,7 @@ nvram () {
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. /etc/nvram.overrides
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# valid interface?
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if_valid () {
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if_valid () (
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ifconfig "$1" >&- 2>&- ||
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[ "${1%%[0-9]}" = "br" ] ||
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{
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@ -29,5 +29,29 @@ if_valid () {
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$DEBUG vconfig add $vif $i 2>&-
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)
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} ||
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{ debug "# missing interface '$if' ignored"; false; }
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{ debug "# missing interface '$1' ignored"; false; }
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)
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bitcount () {
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local c=$1
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echo $((
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c=((c>> 1)&0x55555555)+(c&0x55555555),
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c=((c>> 2)&0x33333333)+(c&0x33333333),
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c=((c>> 4)&0x0f0f0f0f)+(c&0x0f0f0f0f),
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c=((c>> 8)&0x00ff00ff)+(c&0x00ff00ff),
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c=((c>>16)&0x0000ffff)+(c&0x0000ffff)
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))
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}
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valid_netmask () {
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return $((-($1)&~$1))
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}
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ip2int () (
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set $(echo $1 | tr '\.' ' ')
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echo $(($1<<24|$2<<16|$3<<8|$4))
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)
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int2ip () {
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echo $(($1>>24&255)).$(($1>>16&255)).$(($1>>8&255)).$(($1&255))
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}
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@ -1,2 +1,25 @@
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#!/bin/sh
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/usr/sbin/dnsmasq
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. /etc/functions.sh
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# interface to use for DHCP
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iface=lan
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ifname=$(nvram get ${iface}_ifname)
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ipaddr=$(nvram get ${iface}_ipaddr)
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netmask=$(nvram get ${iface}_netmask)
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# check for existing DHCP server
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udhcpc -n -q -R -s /dev/zero -i $ifname >&- || {
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ipaddr=$(ip2int $ipaddr)
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netmask=$(ip2int ${netmask:-255.255.255.0})
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network=$((ipaddr&netmask))
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start=$(nvram get dhcp_start)
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start=$((network+${start:-100}))
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end=$(nvram get dhcp_num)
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end=$((start+${end:-150}))
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args="-K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
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}
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/usr/sbin/dnsmasq ${args}
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@ -10,6 +10,7 @@
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if_valid $if || return
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mac=$(nvram get ${type}_hwaddr)
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$DEBUG ifconfig $if down 2>&-
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if [ "${if%%[0-9]}" = "br" ]; then
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stp=$(nvram get ${type}_stp)
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@ -19,13 +20,14 @@
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$DEBUG brctl stp $if ${stp:-0}
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for sif in $(nvram get ${type}_ifnames); do {
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if_valid $sif || continue
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${mac:+$DEBUG ifconfig $sif down hw ether $mac}
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$DEBUG ifconfig $sif 0.0.0.0 up
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$DEBUG brctl addif $if $sif
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} done
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else
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${mac:+$DEBUG ifconfig $if down hw ether $mac}
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fi
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mac=$(nvram get ${type}_hwaddr)
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${mac:+$DEBUG ifconfig $if hw ether $mac}
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if_proto=$(nvram get ${type}_proto)
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case "$if_proto" in
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@ -50,7 +52,7 @@
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if [ -f $pidfile ]; then
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$DEBUG kill $(cat $pidfile)
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fi
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${DEBUG:-eval} "udhcpc -i $if ${ip:+-r $ip} -b -p $pidfile &"
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${DEBUG:-eval} "udhcpc -R -i $if ${ip:+-r $ip} -b -p $pidfile &"
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;;
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none|"")
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# pppoe is handled by /etc/init.d/S50pppoe
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