From 6af32e50e9e00989d4f9dbd7a4069540576952c6 Mon Sep 17 00:00:00 2001 From: epochqwert Date: Wed, 6 May 2015 00:44:11 -0500 Subject: added ipgen and cidr programs. They can be used together to spit out all IPs belonging to a CIDR style network or you can use just ipgen to use a netmask. even works with weird netmasks. --- src/bin/cidr.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/bin/cidr.c (limited to 'src/bin/cidr.c') diff --git a/src/bin/cidr.c b/src/bin/cidr.c new file mode 100644 index 0000000..fe44668 --- /dev/null +++ b/src/bin/cidr.c @@ -0,0 +1,25 @@ +#include + +int main(int argc,char *argv[]) { + unsigned int cidr; + unsigned int net; + unsigned int mask; + if(argc < 2) { + printf("usage: cidr address/cidr\n"); + printf("example: cidr 192.168.0.1/24\n"); + return 1; + } + if(!strchr(argv[1],'/')) { + cidr=32; + net=argv[1]; + } else { + cidr=atoi(strchr(argv[1],'/')+1); + *strchr(argv[1],'/')=0; + net=htonl(inet_addr(argv[1])); + } + printf("%d.%d.%d.%d ",net>>24&255,net>>16&255,net>>8&255,net&255); + mask=-1; + mask>>=(32-cidr); + mask<<=(32-cidr); + printf("%d.%d.%d.%d\n",mask>>24&255,mask>>16&255,mask>>8&255,mask&255); +} -- cgit v1.2.3