r00t2/go_subnetter
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v0.2.0

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ADDED:
* num-nets subcommand' this is MUCH much faster than actually splitting
  if you're trying to figure out how many times a given subnet fits into
  a network.
This commit is contained in:
brent saner
2025-04-06 01:31:51 -04:00
parent 701b598b1c
commit 3c239a4d09
5 changed files with 91 additions and 8 deletions
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24
cmd/subnetter/args.go
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@@ -5,8 +5,9 @@ type Args struct {
SplitCIDR SplitCIDRArgs `command:"split-cidr" alias:"se" description:"Split a network into as many equal subnets of prefix size N as possible." validate:"omitempty"`
SplitHost SplitHostArgs `command:"split-hosts" alias:"sh" description:"Split a network into N total number of hosts *per subnet* as cleanly/evenly as possible. (VERY easy to run out of memory for IPv6 prefixes; be sure to specify very small network!)" validate:"omitempty"`
SplitSubnets SplitSubnetArgs `command:"split-nets" alias:"sn" description:"Split a network into N number of subnets as cleanly as possible." validate:"omitempty"`
VLSM VLSMArgs `command:"vlsm" alias:"sv" description:"Use VLSM (Variable-Length Subnet Masks) to split a network into differently sized subnets." validate:"omitempty"`
ExplicitNetwork XNetArgs `command:"net" alias:"xn" description:"Print information about an explicit network address." validate:"omitempty"`
VLSM VLSMArgs `command:"split-vlsm" alias:"sv" alias:"vlsm" description:"Use VLSM (Variable-Length Subnet Masks) to split a network into differently sized subnets." validate:"omitempty"`
ExplicitNetwork XNetArgs `command:"net" alias:"xn" alias:"net" description:"Print information about an explicit network address." validate:"omitempty"`
NumNets NNetArgs `command:"num-nets" alias:"nn" alias:"nets" description:"Return the number of subnets of a given size that can fit into a given network size. This is MUCH, MUCH FASTER than splitting (if you do not need addressing)." validate:"omitempty"`
Parse ParseArgs `command:"parse" alias:"p" alias:"read" alias:"convert" description:"Parse/convert output from a previous subnetter run." validate:"omitempty"`
Table TableArgs `command:"table" alias:"t" alias:"tab" alias:"tbl" description:"Show prefix summaries (by default both IPv4 and IPv6)." validate:"omitempty"`
Check CheckArgs `command:"reserved" alias:"r" description:"Check if a subnet is reserved per IANA/RFC." validate:"omitempty"`
@@ -16,7 +17,7 @@ type verArgs struct {
DetailVersion bool `short:"V" long:"detail" description:"Print detailed version info and exit."`
}
type common struct {
type commonBase struct {
cacheArgs
SuppressRemaining bool `short:"r" long:"no-remaining" description:"Don't show leftover/unallocated/remaining space."`
Plain bool `short:"p" long:"plain" description:"Show plain output instead of unicode (only used if -f/--format=pretty)."`
@@ -26,7 +27,11 @@ type common struct {
AllowReserved bool `short:"R" long:"allow-reserved" description:"If specified, do not warn about reserved IP addresses/networks."`
reservedArgs
AllowHostNet bool `short:"H" long:"allow-host" description:"If specified, do not warn about host bits. Host bits are always removed for subnetting (as otherwise there would be errors); this is only used only for output."`
Network Net `positional-args:"yes" required:"true" description:"The network/parent prefix to operate on." validate:"required"`
}
type common struct {
commonBase
Network Net `positional-args:"yes" required:"true" description:"The network/parent prefix to operate on." validate:"required"`
}
type reservedArgs struct {
@@ -44,8 +49,17 @@ type cacheArgs struct {
DoResCache bool `short:"c" long:"cache-reservations" env:"SBNTR_RSVCACHE" description:"Enable caching/cache lookup for reservation data."`
}
type NNetArgs struct {
Verbose bool `short:"v" long:"verbose" description:"Be verbose (more ideal for logging)."`
NoV6Check bool `short:"6" long:"no-v6" description:"If specified, do not indicate if the subnetting is IPv6 only (true) or not (false; dual-stack/IPv4 supported)."`
Sizes struct {
SubnetSize uint8 `required:"1" validate:"required,le=128,gtefield=NetworkSize"`
NetworkSize uint8 `required:"1" validate:"required,le=128,ltefield=SubnetSize"`
} `positional-args:"yes" required:"2" validate:"required"`
}
type ParseArgs struct {
splitArgs
commonBase
InFile string `short:"i" long:"input" default:"-" description:"Input file to parse. Default is '-' (for STDIN)." required:"true" validate:"required,filepath|eq=-"`
}