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ipcalc.sh CIDR notation Hi,

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the attached patch makes ipcalc.sh accept IP/Netmask combinations in
CIDR notation. Before you could only do:

# sh ipcalc.sh 192.168.0.0 255.255.255.0 1 10
IP=192.168.0.0
NETMASK=255.255.255.0
BROADCAST=192.168.0.255
NETWORK=192.168.0.0
PREFIX=24
START=192.168.0.1
END=192.168.0.11

with this patch you can also execute it with:

sh ipcalc.sh 192.168.0.0/24 1 10
IP=192.168.0.0
NETMASK=255.255.255.0
BROADCAST=192.168.0.255
NETWORK=192.168.0.0
PREFIX=24
START=192.168.0.1
END=192.168.0.11

The patch is based on #1260 [1], i just changed one line to calculate
the START end END ips right. I wonder why that never got included. If
there is no reason not to do i would like to ask you to commit that
patch, because its a functionality i (and probably others) miss quite often.

Btw, i also fixed 4 useless tabs, that might look a bit strange in the
patch.

Regards, Manuel

SVN-Revision: 26930
This commit is contained in:
Jo-Philipp Wich 2011-05-18 09:50:06 +00:00
parent e35822050b
commit ed8f726dab
2 changed files with 16 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
package/base-files/Makefile
View File

@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=base-files PKG_NAME:=base-files
PKG_RELEASE:=69 PKG_RELEASE:=70
PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/ PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
PKG_BUILD_DEPENDS:=opkg/host PKG_BUILD_DEPENDS:=opkg/host

21
package/base-files/files/bin/ipcalc.sh
View File

@ -23,15 +23,24 @@ function int2ip(ip,ret,x) {
} }
BEGIN { BEGIN {
ipaddr=ip2int(ARGV[1]) slpos=index(ARGV[1],"/")
netmask=ip2int(ARGV[2]) if (slpos == 0) {
ipaddr=ip2int(ARGV[1])
netmask=ip2int(ARGV[2])
} else {
ipaddr=ip2int(substr(ARGV[1],0,slpos-1))
netmask=compl(2**(32-int(substr(ARGV[1],slpos+1)))-1)
ARGV[4]=ARGV[3]
ARGV[3]=ARGV[2]
}
network=and(ipaddr,netmask) network=and(ipaddr,netmask)
broadcast=or(network,compl(netmask)) broadcast=or(network,compl(netmask))
start=or(network,and(ip2int(ARGV[3]),compl(netmask))) start=or(network,and(ip2int(ARGV[3]),compl(netmask)))
limit=network+1 limit=network+1
if (start<limit) start=limit if (start<limit) start=limit
end=start+ARGV[4] end=start+ARGV[4]
limit=or(network,compl(netmask))-1 limit=or(network,compl(netmask))-1
if (end>limit) end=limit if (end>limit) end=limit
@ -41,10 +50,10 @@ BEGIN {
print "BROADCAST="int2ip(broadcast) print "BROADCAST="int2ip(broadcast)
print "NETWORK="int2ip(network) print "NETWORK="int2ip(network)
print "PREFIX="32-bitcount(compl(netmask)) print "PREFIX="32-bitcount(compl(netmask))
# range calculations: # range calculations:
# ipcalc <ip> <netmask> <start> <num> # ipcalc <ip> <netmask> <start> <num>
if (ARGC > 3) { if (ARGC > 3) {
print "START="int2ip(start) print "START="int2ip(start)
print "END="int2ip(end) print "END="int2ip(end)