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make dnsmasq probe for dhcp servers before starting a dhcp server

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SVN-Revision: 1110
v19.07.3_mercusys_ac12_duma
Mike Baker 19 years ago
parent e92d23457f
commit bc5fb8093d
4 changed files with 144 additions and 6 deletions
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89
openwrt/package/busybox/patches/150-udhcp-release.patch
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@ -0,0 +1,89 @@
diff -Nurb busybox-1.00/include/usage.h busybox-1.00-patched/include/usage.h
--- busybox-1.00/include/usage.h 2005-05-30 05:34:45.397776704 -0400
+++ busybox-1.00-patched/include/usage.h 2005-05-30 05:04:29.271869808 -0400
@@ -2629,6 +2629,7 @@
"\t-n,\t--now\tExit with failure if lease cannot be immediately negotiated.\n" \
"\t-p,\t--pidfile=file\tStore process ID of daemon in file\n" \
"\t-q,\t--quit\tQuit after obtaining lease\n" \
+ "\t-R\t--release\tRelease IP on quit\n" \
"\t-r,\t--request=IP\tIP address to request (default: none)\n" \
"\t-s,\t--script=file\tRun file at dhcp events (default: /usr/share/udhcpc/default.script)\n" \
"\t-v,\t--version\tDisplay version"
diff -Nurb busybox-1.00/networking/udhcp/dhcpc.c busybox-1.00-patched/networking/udhcp/dhcpc.c
--- busybox-1.00/networking/udhcp/dhcpc.c 2004-05-19 04:29:05.000000000 -0400
+++ busybox-1.00-patched/networking/udhcp/dhcpc.c 2005-05-30 05:00:47.377602864 -0400
@@ -61,6 +61,7 @@
abort_if_no_lease: 0,
foreground: 0,
quit_after_lease: 0,
+ release_on_quit: 0,
background_if_no_lease: 0,
interface: "eth0",
pidfile: NULL,
@@ -87,6 +88,7 @@
" immediately negotiated.\n"
" -p, --pidfile=file Store process ID of daemon in file\n"
" -q, --quit Quit after obtaining lease\n"
+" -R, --release Release IP on quit\n"
" -r, --request=IP IP address to request (default: none)\n"
" -s, --script=file Run file at dhcp events (default:\n"
" " DEFAULT_SCRIPT ")\n"
@@ -202,6 +204,7 @@
{"now", no_argument, 0, 'n'},
{"pidfile", required_argument, 0, 'p'},
{"quit", no_argument, 0, 'q'},
+ {"release", no_argument, 0, 'R'},
{"request", required_argument, 0, 'r'},
{"script", required_argument, 0, 's'},
{"version", no_argument, 0, 'v'},
@@ -251,6 +254,9 @@
case 'q':
client_config.quit_after_lease = 1;
break;
+ case 'R':
+ client_config.release_on_quit = 1;
+ break;
case 'r':
requested_ip = inet_addr(optarg);
break;
@@ -472,8 +478,11 @@
state = BOUND;
change_mode(LISTEN_NONE);
- if (client_config.quit_after_lease)
+ if (client_config.quit_after_lease) {
+ if (client_config.release_on_quit)
+ perform_release();
return 0;
+ }
if (!client_config.foreground)
client_background();
@@ -498,12 +507,13 @@
case SIGUSR1:
perform_renew();
break;
- case SIGUSR2:
- perform_release();
- break;
case SIGTERM:
LOG(LOG_INFO, "Received SIGTERM");
+ if (!client_config.release_on_quit)
return 0;
+ case SIGUSR2:
+ perform_release();
+ break;
}
} else if (retval == -1 && errno == EINTR) {
/* a signal was caught */
diff -Nurb busybox-1.00/networking/udhcp/dhcpc.h busybox-1.00-patched/networking/udhcp/dhcpc.h
--- busybox-1.00/networking/udhcp/dhcpc.h 2004-01-30 18:45:12.000000000 -0500
+++ busybox-1.00-patched/networking/udhcp/dhcpc.h 2005-05-30 04:53:58.681734080 -0400
@@ -20,6 +20,7 @@
struct client_config_t {
char foreground; /* Do not fork */
char quit_after_lease; /* Quit after obtaining lease */
+ char release_on_quit; /* perform release on quit */
char abort_if_no_lease; /* Abort if no lease */
char background_if_no_lease; /* Fork to background if no lease */
char *interface; /* The name of the interface to use */

28
openwrt/target/default/target_skeleton/etc/functions.sh
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@ -12,7 +12,7 @@ nvram () {
. /etc/nvram.overrides
# valid interface?
if_valid () {
if_valid () (
ifconfig "$1" >&- 2>&- ||
[ "${1%%[0-9]}" = "br" ] ||
{
@ -29,5 +29,29 @@ if_valid () {
$DEBUG vconfig add $vif $i 2>&-
)
} ||
{ debug "# missing interface '$if' ignored"; false; }
{ debug "# missing interface '$1' ignored"; false; }
)
bitcount () {
local c=$1
echo $((
c=((c>> 1)&0x55555555)+(c&0x55555555),
c=((c>> 2)&0x33333333)+(c&0x33333333),
c=((c>> 4)&0x0f0f0f0f)+(c&0x0f0f0f0f),
c=((c>> 8)&0x00ff00ff)+(c&0x00ff00ff),
c=((c>>16)&0x0000ffff)+(c&0x0000ffff)
))
}
valid_netmask () {
return $((-($1)&~$1))
}
ip2int () (
set $(echo $1 | tr '\.' ' ')
echo $(($1<<24|$2<<16|$3<<8|$4))
)
int2ip () {
echo $(($1>>24&255)).$(($1>>16&255)).$(($1>>8&255)).$(($1&255))
}

25
openwrt/target/default/target_skeleton/etc/init.d/S50dnsmasq
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@ -1,2 +1,25 @@
#!/bin/sh
/usr/sbin/dnsmasq
. /etc/functions.sh
# interface to use for DHCP
iface=lan
ifname=$(nvram get ${iface}_ifname)
ipaddr=$(nvram get ${iface}_ipaddr)
netmask=$(nvram get ${iface}_netmask)
# check for existing DHCP server
udhcpc -n -q -R -s /dev/zero -i $ifname >&- || {
ipaddr=$(ip2int $ipaddr)
netmask=$(ip2int ${netmask:-255.255.255.0})
network=$((ipaddr&netmask))
start=$(nvram get dhcp_start)
start=$((network+${start:-100}))
end=$(nvram get dhcp_num)
end=$((start+${end:-150}))
args="-K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
}
/usr/sbin/dnsmasq ${args}

8
openwrt/target/default/target_skeleton/sbin/ifup
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@ -10,6 +10,7 @@
if_valid $if || return
mac=$(nvram get ${type}_hwaddr)
$DEBUG ifconfig $if down 2>&-
if [ "${if%%[0-9]}" = "br" ]; then
stp=$(nvram get ${type}_stp)
@ -19,13 +20,14 @@
$DEBUG brctl stp $if ${stp:-0}
for sif in $(nvram get ${type}_ifnames); do {
if_valid $sif || continue
${mac:+$DEBUG ifconfig $sif down hw ether $mac}
$DEBUG ifconfig $sif 0.0.0.0 up
$DEBUG brctl addif $if $sif
} done
else
${mac:+$DEBUG ifconfig $if down hw ether $mac}
fi
mac=$(nvram get ${type}_hwaddr)
${mac:+$DEBUG ifconfig $if hw ether $mac}
if_proto=$(nvram get ${type}_proto)
case "$if_proto" in
@ -50,7 +52,7 @@
if [ -f $pidfile ]; then
$DEBUG kill $(cat $pidfile)
fi
${DEBUG:-eval} "udhcpc -i $if ${ip:+-r $ip} -b -p $pidfile &"
${DEBUG:-eval} "udhcpc -R -i $if ${ip:+-r $ip} -b -p $pidfile &"
;;
none|"")
# pppoe is handled by /etc/init.d/S50pppoe

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