bazel stuff

BUILD.bazel

@@ -1,4 +1,4 @@
 load("@bazel_gazelle//:def.bzl", "gazelle")
 
-# gazelle:prefix git.wntrmute.dev/kyle/bladerunner
+# gazelle:prefix git.wntrmute.dev/kyle/kdhcp
 gazelle(name = "gazelle")

WORKSPACE

@@ -31,6 +31,9 @@ load("//:deps.bzl", "go_dependencies")
 
 # gazelle:repository_macro deps.bzl%go_dependencies
 go_dependencies()
+
 go_rules_dependencies()
+
 go_register_toolchains(version = "1.20.3")
+
 gazelle_dependencies()

cmd/kdhcpd/BUILD.bazel

@@ -0,0 +1,15 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "kdhcpd_lib",
+    srcs = ["main.go"],
+    importpath = "git.wntrmute.dev/kyle/kdhcp/cmd/kdhcpd",
+    visibility = ["//visibility:private"],
+    deps = ["//server"],
+)
+
+go_binary(
+    name = "kdhcpd",
+    embed = [":kdhcpd_lib"],
+    visibility = ["//visibility:public"],
+)

deps.bzl

@@ -0,0 +1,9 @@
+load("@bazel_gazelle//:deps.bzl", "go_repository")
+
+def go_dependencies():
+    go_repository(
+        name = "com_github_davecgh_go_spew",
+        importpath = "github.com/davecgh/go-spew",
+        sum = "h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=",
+        version = "v1.1.1",
+    )

gazelle.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -euxo pipefail
 

go.mod

@@ -1,3 +1,8 @@
 module git.wntrmute.dev/kyle/kdhcp
 
 go 1.20
+
+require (
+	github.com/davecgh/go-spew v1.1.1
+	github.com/hashicorp/go-syslog v1.0.0
+)

go.sum

@@ -0,0 +1,4 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/hashicorp/go-syslog v1.0.0 h1:KaodqZuhUoZereWVIYmpUgZysurB1kBLX2j0MwMrUAE=
+github.com/hashicorp/go-syslog v1.0.0/go.mod h1:qPfqrKkXGihmCqbJM2mZgkZGvKG1dFdvsLplgctolz4=

server/BUILD.bazel

@@ -0,0 +1,9 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "server",
+    srcs = ["server.go"],
+    importpath = "git.wntrmute.dev/kyle/kdhcp/server",
+    visibility = ["//visibility:public"],
+    deps = ["@com_github_davecgh_go_spew//spew"],
+)

server/server.go

@@ -1,13 +1,21 @@
 package server
 
+
 import (
 	"errors"
 	"log"
 	"net"
+
+	"github.com/davecgh/go-spew/spew"
 )
 
 // github.com/insomniacslk/dhcp
 
+type addr struct {
+	IP  net.IP
+	ipn *net.IPNet
+}
+
 type Config struct {
 	Device string `yaml:"device"`
 }
@@ -17,35 +25,47 @@ type Server struct {
 	l     net.Listener
 }
 
-func addrsForDevice(dev string) ([]net.IP, error) {
+func addrsForDevice(dev string) ([]addr, error) {
 	netInterface, err := net.InterfaceByName(dev)
 	if err != nil {
 		return nil, err
 	}
 
-	var addrs []net.IP
+	spew.Dump(netInterface)
+
+	var addrs []addr
 	devAddrs, err := netInterface.Addrs()
 	if err != nil {
 		return nil, err
 	}
 
-	for _, addr := range devAddrs {
-		ip := net.ParseIP(addr.String())
+	for _, devAddr := range devAddrs {
+		log.Printf("consider %s", devAddr.String())
+		ip, ipn, err := net.ParseCIDR(devAddr.String())
+		if err != nil {
+			continue
+		}
+
 		if ip == nil {
 			continue // address isn't an IP address
 		}
 
+		log.Printf("found IP: %s", ip)
+		ip = ip.To4()
+
 		// DHCP should only listen on private addresses.
 		if !ip.IsPrivate() {
+			log.Println("skipping non-private")
 			continue
 		}
 
 		// only support IPv4 for now
 		if len(ip) != 4 {
+			log.Printf("%d IP, only supporting v4 right now", len(ip))
 			continue
 		}
 
-		addrs = append(addrs, ip)
+		addrs = append(addrs, addr{ip, ipn})
 	}
 
 	return addrs, nil