From 860a965e642c273c7e969056c7336c8394cbac67 Mon Sep 17 00:00:00 2001
From: 1998-felix <felix.gateru@gmail.com>
Date: Fri, 19 Apr 2024 17:10:35 +0300
Subject: [PATCH 01/12] feat: Migrate gocoap from v2 to v3.3

Signed-off-by: 1998-felix <felix.gateru@gmail.com>
---
 .env       |  9 +++++++++
 configs.go | 26 ++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 .env
 create mode 100644 configs.go

diff --git a/.env b/.env
new file mode 100644
index 0000000..0f3ef84
--- /dev/null
+++ b/.env
@@ -0,0 +1,9 @@
+COAP_CLI_HOST=localhost
+COAP_CLI_PORT=5683
+COAP_CLI_CONTENT_FORMAT=50
+COAP_CLI_AUTH=
+COAP_CLI_OBSERVE=
+COAP_CLI_CERT_FILE=
+COAP_CLI_KEY_FILE=
+COAP_CLI_SERVER_CA_FILE=
+COAP_CLI_CLIENT_CA_FILE=
diff --git a/configs.go b/configs.go
new file mode 100644
index 0000000..7f71bf6
--- /dev/null
+++ b/configs.go
@@ -0,0 +1,26 @@
+package coapcli
+
+import (
+	"github.com/caarlos0/env/v10"
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	Host          string `env:"COAP_CLI_HOST"`
+	Port          string `env:"COAP_CLI_PORT"`
+	ContentFormat int    `env:"COAP_CLI_CONTENT_FORMAT"`
+	Auth          string `env:"COAP_CLI_AUTH"`
+	Observe       bool   `env:"COAP_CLI_OBSERVE"`
+}
+
+func LoadConfig() (Config, error) {
+	c := Config{}
+	err := godotenv.Load()
+	if err != nil {
+		panic(err)
+	}
+	if err := env.Parse(&c); err != nil {
+		return Config{}, err
+	}
+	return c, nil
+}

From 670d5c39be54533b9913fee8dab82ac64f8b7f86 Mon Sep 17 00:00:00 2001
From: 1998-felix <felix.gateru@gmail.com>
Date: Fri, 26 Apr 2024 12:21:47 +0300
Subject: [PATCH 02/12] refactor: Remove .env file

Signed-off-by: 1998-felix <felix.gateru@gmail.com>
---
 .env       |  9 ---------
 configs.go | 26 --------------------------
 2 files changed, 35 deletions(-)
 delete mode 100644 .env
 delete mode 100644 configs.go

diff --git a/.env b/.env
deleted file mode 100644
index 0f3ef84..0000000
--- a/.env
+++ /dev/null
@@ -1,9 +0,0 @@
-COAP_CLI_HOST=localhost
-COAP_CLI_PORT=5683
-COAP_CLI_CONTENT_FORMAT=50
-COAP_CLI_AUTH=
-COAP_CLI_OBSERVE=
-COAP_CLI_CERT_FILE=
-COAP_CLI_KEY_FILE=
-COAP_CLI_SERVER_CA_FILE=
-COAP_CLI_CLIENT_CA_FILE=
diff --git a/configs.go b/configs.go
deleted file mode 100644
index 7f71bf6..0000000
--- a/configs.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package coapcli
-
-import (
-	"github.com/caarlos0/env/v10"
-	"github.com/joho/godotenv"
-)
-
-type Config struct {
-	Host          string `env:"COAP_CLI_HOST"`
-	Port          string `env:"COAP_CLI_PORT"`
-	ContentFormat int    `env:"COAP_CLI_CONTENT_FORMAT"`
-	Auth          string `env:"COAP_CLI_AUTH"`
-	Observe       bool   `env:"COAP_CLI_OBSERVE"`
-}
-
-func LoadConfig() (Config, error) {
-	c := Config{}
-	err := godotenv.Load()
-	if err != nil {
-		panic(err)
-	}
-	if err := env.Parse(&c); err != nil {
-		return Config{}, err
-	}
-	return c, nil
-}

From bdba70b4e6cd13f7b408da59943aa9539c609ba7 Mon Sep 17 00:00:00 2001
From: 1998-felix <felix.gateru@gmail.com>
Date: Fri, 3 May 2024 17:51:05 +0300
Subject: [PATCH 03/12] feat: add options command, example with coap.me

Signed-off-by: 1998-felix <felix.gateru@gmail.com>
---
 examples/coapme/test.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 examples/coapme/test.sh

diff --git a/examples/coapme/test.sh b/examples/coapme/test.sh
new file mode 100755
index 0000000..e7bf53f
--- /dev/null
+++ b/examples/coapme/test.sh
@@ -0,0 +1,40 @@
+host="coap.me"
+port="5683"
+testPath="/test"
+largePath="/large"
+etagPath="/etag"
+payload="Hello world from absmach/coap-cli"
+
+#Get
+echo "Sending GET request to $host:$port$testPath"
+coap-cli get $testPath -H $host -p $port
+sleep 1
+
+#Get with blockwise transfer
+echo "Sending GET request with blockwise transfer to $host:$port$testPath"
+coap-cli get $largePath -H $host -p $port
+sleep 1
+
+#Post
+echo "Sending POST request to $host:$port$testPath"
+coap-cli post $testPath -H $host -p $port -d $payload 
+sleep 1
+
+#Post with content format
+echo "Sending POST request with content format to $host:$port$testPath"
+coap-cli post $testPath -H $host -p $port -d $payload -c 50
+sleep 1
+
+#Post with authentication
+echo "Sending POST request with authentication to $host:$port$testPath"
+coap-cli post $testPath -H $host -p $port -d $payload --auth "test"
+sleep 1
+
+#Put
+echo "Sending PUT request to $host:$port$testPath"
+coap-cli put $testPath -H $host -p $port -d $payload
+sleep 1
+
+#Delete
+echo "Sending DELETE request to $host:$port$testPath"
+coap-cli delete $testPath -H $host -p $port

From 5151a4557864f8bcc47503c705c6f50354f08f12 Mon Sep 17 00:00:00 2001
From: 1998-felix <felix.gateru@gmail.com>
Date: Fri, 3 May 2024 08:28:12 +0300
Subject: [PATCH 04/12] feat: add dtls config

Signed-off-by: 1998-felix <felix.gateru@gmail.com>
---
 Makefile             |  28 +++++++--
 README.md            |  12 ++++
 coap/client.go       |  12 +++-
 go.mod               |   3 +
 go.sum               |  10 +--
 main.go              | 143 +++++++++++++++++++++++++++++--------------
 ssl/Makefile         |  64 +++++++++++++++++++
 ssl/certs/ca.crt     |  22 +++++++
 ssl/certs/ca.key     |  28 +++++++++
 ssl/certs/ca.srl     |   1 +
 ssl/certs/client.crt |  26 ++++++++
 ssl/certs/client.key |  52 ++++++++++++++++
 12 files changed, 345 insertions(+), 56 deletions(-)
 create mode 100644 ssl/Makefile
 create mode 100644 ssl/certs/ca.crt
 create mode 100644 ssl/certs/ca.key
 create mode 100644 ssl/certs/ca.srl
 create mode 100644 ssl/certs/client.crt
 create mode 100644 ssl/certs/client.key

diff --git a/Makefile b/Makefile
index 6545ef2..8ce8e73 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,27 @@
 # Copyright (c) Abstract Machines
 # SPDX-License-Identifier: Apache-2.0
 
-all:
-	CGO_ENABLED=0 GOOS=linux go build -ldflags "-s -w" -o build/coap-cli-linux main.go
-	CGO_ENABLED=0 GOOS=darwin go build -ldflags "-s -w" -o build/coap-cli-darwin main.go
-	CGO_ENABLED=0 GOOS=windows go build -ldflags "-s -w" -o build/coap-cli-windows main.go
+INSTALL_DIR=/usr/local/bin
+BUILD_DIR=build
+BUILD_FLAGS=-ldflags "-s -w"
+
+.PHONY: all linux darwin windows install install-linux
+
+all: linux darwin windows
+
+linux:
+	CGO_ENABLED=0 GOOS=linux go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-linux cmd/main.go
+
+darwin:
+	CGO_ENABLED=0 GOOS=darwin go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-darwin cmd/main.go
+
+windows:
+	CGO_ENABLED=0 GOOS=windows go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-windows cmd/main.go
+	
+install: install-linux 
+
+install-linux:
+	@cp $(BUILD_DIR)/coap-cli-linux $(INSTALL_DIR)/coap-cli || { echo "Installation failed"; exit 1; }
+
+clean:
+	rm -rf $(BUILD_DIR)/*
diff --git a/README.md b/README.md
index 3ce2d95..1c959b2 100644
--- a/README.md
+++ b/README.md
@@ -18,10 +18,13 @@ Available Commands:
 
 Flags:
   -a, --auth string           Auth
+  -A, --ca-file string        Client CA file
+  -C, --cert-file string      Client certificate file
   -c, --content-format int    Content format (default 50)
   -h, --help                  help for coap-cli
   -H, --host string           Host (default "localhost")
   -k, --keep-alive uint       Send a ping after interval seconds of inactivity. If not specified (or 0), keep-alive is disabled (default).
+  -K, --key-file string       Client key file
   -m, --max-retries uint32    Max retries for keep alive (default 10)
   -O, --options num,text      Add option num with contents of text to the request. If the text begins with 0x, then the hex text (two [0-9a-f] per byte) is converted to binary data.
   -p, --port string           Port (default "5683")
@@ -44,10 +47,15 @@ coap-cli get m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26
 coap-cli get m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic --options 6,0x00 --options 15,auth=1e1017e6-dee7-45b4-8a13-00e6afeb66eb
 ```
 
+```bash
+coap-cli get m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic --options 6,0x00 --options 15,auth=1e1017e6-dee7-45b4-8a13-00e6afeb66eb --ca-file ssl/certs/ca.crt --cert-file ssl/certs/client.crt --key-file ssl/certs/client.key
+```
+
 ```bash
 coap-cli post m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic --auth 1e1017e6-dee7-45b4-8a13-00e6afeb66eb -d "hello world"
 ```
 
+
 ```bash
 coap-cli post m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic --auth 1e1017e6-dee7-45b4-8a13-00e6afeb66eb -d "hello world" -H 0.0.0.0 -p 1234
 ```
@@ -55,3 +63,7 @@ coap-cli post m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-2
 ```bash
 coap-cli post m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic --options 15,auth=1e1017e6-dee7-45b4-8a13-00e6afeb66eb -d "hello world" -H 0.0.0.0 -p 5683
 ```
+
+```bash
+coap-cli post channels/0bb5ba61-a66e-4972-bab6-26f19962678f/messages/subtopic --auth 1e1017e6-dee7-45b4-8a13-00e6afeb66eb -d "hello world" --ca-file ssl/certs/ca.crt --cert-file ssl/certs/client.crt --key-file ssl/certs/client.key
+```
diff --git a/coap/client.go b/coap/client.go
index 2395ba2..53f91f0 100644
--- a/coap/client.go
+++ b/coap/client.go
@@ -11,6 +11,8 @@ import (
 	"log"
 	"time"
 
+	piondtls "github.com/pion/dtls/v2"
+	"github.com/plgd-dev/go-coap/v3/dtls"
 	"github.com/plgd-dev/go-coap/v3/message"
 	"github.com/plgd-dev/go-coap/v3/message/codes"
 	"github.com/plgd-dev/go-coap/v3/message/pool"
@@ -39,12 +41,18 @@ type Client struct {
 }
 
 // NewClient returns new CoAP client connecting it to the server.
-func NewClient(addr string, keepAlive uint64, maxRetries uint32) (Client, error) {
+func NewClient(addr string, keepAlive uint64, maxRetries uint32, dtlsConfig *piondtls.Config) (Client, error) {
 	var dialOptions []udp.Option
 	if keepAlive > 0 {
 		dialOptions = append(dialOptions, options.WithKeepAlive(maxRetries, time.Duration(keepAlive)*time.Second, onInactive))
 	}
-	c, err := udp.Dial(addr, dialOptions...)
+	var c *client.Conn
+	var err error
+	if dtlsConfig != nil {
+		c, err = dtls.Dial(addr, dtlsConfig, dialOptions...)
+	} else {
+		c, err = udp.Dial(addr, dialOptions...)
+	}
 	if err != nil {
 		return Client{}, errors.Join(errDialFailed, err)
 	}
diff --git a/go.mod b/go.mod
index 87b8fec..09ff87e 100644
--- a/go.mod
+++ b/go.mod
@@ -4,11 +4,13 @@ go 1.24
 
 require (
 	github.com/fatih/color v1.18.0
+	github.com/pion/dtls/v2 v2.2.8-0.20240501061905-2c36d63320a0
 	github.com/plgd-dev/go-coap/v3 v3.4.0
 	github.com/spf13/cobra v1.9.1
 )
 
 require (
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dsnet/golib/memfile v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
@@ -16,6 +18,7 @@ require (
 	github.com/pion/dtls/v3 v3.0.6 // indirect
 	github.com/pion/logging v0.2.4 // indirect
 	github.com/pion/transport/v3 v3.0.7 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/spf13/pflag v1.0.7 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	golang.org/x/crypto v0.40.0 // indirect
diff --git a/go.sum b/go.sum
index 00e63cf..32509e8 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,6 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-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/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dsnet/golib/memfile v1.0.0 h1:J9pUspY2bDCbF9o+YGwcf3uG6MdyITfh/Fk3/CaEiFs=
 github.com/dsnet/golib/memfile v1.0.0/go.mod h1:tXGNW9q3RwvWt1VV2qrRKlSSz0npnh12yftCSCy2T64=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
@@ -11,6 +11,8 @@ github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHP
 github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stgPZH1UqBm1s8=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/pion/dtls/v2 v2.2.8-0.20240501061905-2c36d63320a0 h1:050ahk2K4HqwxPi2YM6Yc4lIttwNSY2+n9xPVsS3zoQ=
+github.com/pion/dtls/v2 v2.2.8-0.20240501061905-2c36d63320a0/go.mod h1:tjBBbkwKGSQQZl36HQa2va5HqR9rWhujhlJMrgE2b/o=
 github.com/pion/dtls/v3 v3.0.6 h1:7Hkd8WhAJNbRgq9RgdNh1aaWlZlGpYTzdqjy9x9sK2E=
 github.com/pion/dtls/v3 v3.0.6/go.mod h1:iJxNQ3Uhn1NZWOMWlLxEEHAN5yX7GyPvvKw04v9bzYU=
 github.com/pion/logging v0.2.4 h1:tTew+7cmQ+Mc1pTBLKH2puKsOvhm32dROumOZ655zB8=
@@ -19,8 +21,8 @@ github.com/pion/transport/v3 v3.0.7 h1:iRbMH05BzSNwhILHoBoAPxoB9xQgOaJk+591KC9P1
 github.com/pion/transport/v3 v3.0.7/go.mod h1:YleKiTZ4vqNxVwh77Z0zytYi7rXHl7j6uPLGhhz9rwo=
 github.com/plgd-dev/go-coap/v3 v3.4.0 h1:ZoGYFDv94xboP+41yW458fLDuYui+4eTgamqp3XJ7k4=
 github.com/plgd-dev/go-coap/v3 v3.4.0/go.mod h1:azpceqoHFeGzzNVm3RX4ox6xKHLOJ+pD0emPpr7FDXA=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
 github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
diff --git a/main.go b/main.go
index 82023b5..83dbe7e 100644
--- a/main.go
+++ b/main.go
@@ -5,7 +5,10 @@ package main
 
 import (
 	"context"
+	"crypto/tls"
+	"crypto/x509"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"log"
 	"os"
@@ -17,25 +20,13 @@ import (
 
 	coap "github.com/absmach/coap-cli/coap"
 	"github.com/fatih/color"
+	piondtls "github.com/pion/dtls/v2"
 	coapmsg "github.com/plgd-dev/go-coap/v3/message"
 	"github.com/plgd-dev/go-coap/v3/message/codes"
 	"github.com/plgd-dev/go-coap/v3/message/pool"
 	"github.com/spf13/cobra"
 )
 
-var (
-	host          string
-	port          string
-	contentFormat int
-	auth          string
-	observe       bool
-	data          string
-	options       []string
-	keepAlive     uint64
-	verbose       bool
-	maxRetries    uint32
-)
-
 const verboseFmt = `Date: %s
 Code: %s
 Type: %s
@@ -44,6 +35,8 @@ Message-ID: %d
 `
 
 func main() {
+	req := &request{}
+
 	rootCmd := &cobra.Command{
 		Use:   "coap-cli <method> <URL> [options]",
 		Short: "CLI for CoAP",
@@ -54,46 +47,49 @@ func main() {
 		Short: "Perform a GET request on a COAP resource",
 		Example: "coap-cli get m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic -a 1e1017e6-dee7-45b4-8a13-00e6afeb66eb -H localhost -p 5683 -O 17,50 -o \n" +
 			"coap-cli get m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic --auth 1e1017e6-dee7-45b4-8a13-00e6afeb66eb --host localhost --port 5683 --options 17,50 --observe",
-		Run: runCmd(codes.GET),
+		Run: runCmd(req, codes.GET),
 	}
-	getCmd.Flags().BoolVarP(&observe, "observe", "o", false, "Observe resource")
+	getCmd.Flags().BoolVarP(&req.observe, "observe", "o", false, "Observe resource")
 
 	putCmd := &cobra.Command{
 		Use:   "put <url>",
 		Short: "Perform a PUT request on a COAP resource",
 		Example: "coap-cli put /test -H coap.me -p 5683 -c 50 -d 'hello, world'\n" +
 			"coap-cli put /test --host coap.me --port 5683 --content-format 50 --data 'hello, world'",
-		Run: runCmd(codes.PUT),
+		Run: runCmd(req, codes.PUT),
 	}
-	putCmd.Flags().StringVarP(&data, "data", "d", "", "Data")
+	putCmd.Flags().StringVarP(&req.data, "data", "d", "", "Data")
 
 	postCmd := &cobra.Command{
 		Use:   "post <url>",
 		Short: "Perform a POST request on a COAP resource",
 		Example: "coap-cli post m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic -a 1e1017e6-dee7-45b4-8a13-00e6afeb66eb  -H localhost -p 5683 -c 50 -d 'hello, world'\n" +
 			"coap-cli post m/aa844fac-2f74-4ec3-8318-849b95d03bcc/c/0bb5ba61-a66e-4972-bab6-26f19962678f/subtopic  --auth 1e1017e6-dee7-45b4-8a13-00e6afeb66eb --host localhost --port 5683 --content-format 50 --data 'hello, world'",
-		Run: runCmd(codes.POST),
+		Run: runCmd(req, codes.POST),
 	}
-	postCmd.Flags().StringVarP(&data, "data", "d", "", "Data")
+	postCmd.Flags().StringVarP(&req.data, "data", "d", "", "Data")
 
 	deleteCmd := &cobra.Command{
 		Use:   "delete <url>",
 		Short: "Perform a DELETE request on a COAP resource",
 		Example: "coap-cli delete /test -H coap.me -p 5683 -c 50 -d 'hello, world' -O 17,50\n" +
 			"coap-cli delete /test --host coap.me --port 5683 --content-format 50 --data 'hello, world' --options 17,50",
-		Run: runCmd(codes.DELETE),
+		Run: runCmd(req, codes.DELETE),
 	}
-	deleteCmd.Flags().StringVarP(&data, "data", "d", "", "Data")
+	deleteCmd.Flags().StringVarP(&req.data, "data", "d", "", "Data")
 
 	rootCmd.AddCommand(getCmd, putCmd, postCmd, deleteCmd)
-	rootCmd.PersistentFlags().StringVarP(&host, "host", "H", "localhost", "Host")
-	rootCmd.PersistentFlags().StringVarP(&port, "port", "p", "5683", "Port")
-	rootCmd.PersistentFlags().StringVarP(&auth, "auth", "a", "", "Auth")
-	rootCmd.PersistentFlags().IntVarP(&contentFormat, "content-format", "c", 50, "Content format")
-	rootCmd.PersistentFlags().StringArrayVarP(&options, "options", "O", []string{}, "Add option num with contents of text to the request. If the text begins with 0x, then the hex text (two [0-9a-f] per byte) is converted to binary data.")
-	rootCmd.PersistentFlags().Uint64VarP(&keepAlive, "keep-alive", "k", 0, "Send a ping after interval seconds of inactivity. If not specified (or 0), keep-alive is disabled (default).")
-	rootCmd.PersistentFlags().Uint32VarP(&maxRetries, "max-retries", "m", 10, "Max retries for keep alive")
-	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "Verbose output")
+	rootCmd.PersistentFlags().StringVarP(&req.host, "host", "H", "localhost", "Host")
+	rootCmd.PersistentFlags().StringVarP(&req.port, "port", "p", "5683", "Port")
+	rootCmd.PersistentFlags().StringVarP(&req.auth, "auth", "a", "", "Auth")
+	rootCmd.PersistentFlags().IntVarP(&req.contentFormat, "content-format", "c", 50, "Content format")
+	rootCmd.PersistentFlags().StringArrayVarP(&req.options, "options", "O", []string{}, "Add option num with contents of text to the request. If the text begins with 0x, then the hex text (two [0-9a-f] per byte) is converted to binary data.")
+	rootCmd.PersistentFlags().Uint64VarP(&req.keepAlive, "keep-alive", "k", 0, "Send a ping after interval seconds of inactivity. If not specified (or 0), keep-alive is disabled (default).")
+	rootCmd.PersistentFlags().Uint32VarP(&req.maxRetries, "max-retries", "m", 10, "Max retries for keep alive")
+	rootCmd.PersistentFlags().BoolVarP(&req.verbose, "verbose", "v", false, "Verbose output")
+	rootCmd.PersistentFlags().StringVarP(&req.certFile, "cert-file", "C", "", "Client certificate file")
+	rootCmd.PersistentFlags().StringVarP(&req.keyFile, "key-file", "K", "", "Client key file")
+	rootCmd.PersistentFlags().StringVarP(&req.clientCAFile, "ca-file", "A", "", "Client CA file")
 
 	if err := rootCmd.Execute(); err != nil {
 		log.Fatalf("Error executing command: %v", err)
@@ -126,14 +122,18 @@ func printMsg(m *pool.Message, verbose bool) {
 	}
 }
 
-func makeRequest(code codes.Code, args []string) {
-	client, err := coap.NewClient(host+":"+port, keepAlive, maxRetries)
+func makeRequest(req *request, args []string) {
+	dtlsConfig, err := req.createDTLSConfig()
+	if err != nil {
+		log.Fatalf("Error creating DTLS config: %v", err)
+	}
+	client, err := coap.NewClient(req.host+":"+req.port, req.keepAlive, req.maxRetries, dtlsConfig)
 	if err != nil {
 		log.Fatalf("Error coap creating client: %v", err)
 	}
 
 	var opts coapmsg.Options
-	for _, optString := range options {
+	for _, optString := range req.options {
 		opt := strings.Split(optString, ",")
 		if len(opt) < 2 {
 			log.Fatal("Invalid option format")
@@ -153,20 +153,20 @@ func makeRequest(code codes.Code, args []string) {
 			opts = append(opts, coapmsg.Option{ID: coapmsg.OptionID(optId), Value: []byte(opt[1])})
 		}
 	}
-	if auth != "" {
-		opts = append(opts, coapmsg.Option{ID: coapmsg.URIQuery, Value: []byte("auth=" + auth)})
+	if req.auth != "" {
+		opts = append(opts, coapmsg.Option{ID: coapmsg.URIQuery, Value: []byte("auth=" + req.auth)})
 	}
 	if opts.HasOption(coapmsg.Observe) {
-		if value, _ := opts.GetBytes(coapmsg.Observe); len(value) == 1 && value[0] == 0 && !observe {
-			observe = true
+		if value, _ := opts.GetBytes(coapmsg.Observe); len(value) == 1 && value[0] == 0 && !req.observe {
+			req.observe = true
 		}
 	}
 
-	switch code {
+	switch req.code {
 	case codes.GET:
 		switch {
-		case observe:
-			obs, err := client.Receive(args[0], verbose, opts...)
+		case req.observe:
+			obs, err := client.Receive(args[0], req.verbose, opts...)
 			if err != nil {
 				log.Fatalf("Error observing resource: %v", err)
 			}
@@ -183,28 +183,79 @@ func makeRequest(code codes.Code, args []string) {
 			}
 			log.Fatalf("Observation terminated: %v", err)
 		default:
-			res, err := client.Send(args[0], code, coapmsg.MediaType(contentFormat), nil, opts...)
+			res, err := client.Send(args[0], req.code, coapmsg.MediaType(req.contentFormat), nil, opts...)
 			if err != nil {
 				log.Fatalf("Error sending message: %v", err)
 			}
-			printMsg(res, verbose)
+			printMsg(res, req.verbose)
 		}
 	default:
-		pld := strings.NewReader(data)
-		res, err := client.Send(args[0], code, coapmsg.MediaType(contentFormat), pld, opts...)
+		pld := strings.NewReader(req.data)
+		res, err := client.Send(args[0], req.code, coapmsg.MediaType(req.contentFormat), pld, opts...)
 		if err != nil {
 			log.Fatalf("Error sending message: %v", err)
 		}
-		printMsg(res, verbose)
+		printMsg(res, req.verbose)
 	}
 }
 
-func runCmd(code codes.Code) func(cmd *cobra.Command, args []string) {
+func runCmd(req *request, code codes.Code) func(cmd *cobra.Command, args []string) {
 	return func(cmd *cobra.Command, args []string) {
 		if len(args) < 1 {
 			fmt.Fprintf(os.Stdout, color.YellowString("\nusage: %s\n\n"), cmd.Use)
 			return
 		}
-		makeRequest(code, args)
+		req.code = code
+		makeRequest(req, args)
+	}
+}
+
+type request struct {
+	code          codes.Code
+	host          string
+	port          string
+	contentFormat int
+	auth          string
+	observe       bool
+	data          string
+	options       []string
+	keepAlive     uint64
+	verbose       bool
+	maxRetries    uint32
+	certFile      string
+	keyFile       string
+	clientCAFile  string
+}
+
+func (r *request) createDTLSConfig() (*piondtls.Config, error) {
+	if r.certFile == "" || r.keyFile == "" {
+		return nil, nil
+	}
+	dc := &piondtls.Config{}
+	cert, err := tls.LoadX509KeyPair(r.certFile, r.keyFile)
+	if err != nil {
+		return nil, errors.Join(errors.New("failed to load certificates"), err)
+	}
+	dc.Certificates = []tls.Certificate{cert}
+	rootCA, err := loadCertFile(r.clientCAFile)
+	if err != nil {
+		return nil, errors.Join(errors.New("failed to load Client CA"), err)
+	}
+	if len(rootCA) > 0 {
+		if dc.RootCAs == nil {
+			dc.RootCAs = x509.NewCertPool()
+		}
+		if !dc.RootCAs.AppendCertsFromPEM(rootCA) {
+			return nil, errors.New("failed to append root ca tls.Config")
+		}
+	}
+	dc.InsecureSkipVerify = true
+	return dc, nil
+}
+
+func loadCertFile(certFile string) ([]byte, error) {
+	if certFile != "" {
+		return os.ReadFile(certFile)
 	}
+	return []byte{}, nil
 }
diff --git a/ssl/Makefile b/ssl/Makefile
new file mode 100644
index 0000000..b5e8359
--- /dev/null
+++ b/ssl/Makefile
@@ -0,0 +1,64 @@
+# Copyright (c) Abstract Machines
+# SPDX-License-Identifier: Apache-2.0
+
+CRT_LOCATION = certs
+O = absmach
+OU_CA = absmach_ca
+OU_CRT = absmach_crt
+EA = info@absmach.com
+CLIENT_CN = coap-cli-client
+CRT_FILE_NAME = client
+CN_CA = Absmach_Self_Signed_CA
+
+define CERT_CONFIG
+[ca]
+subjectKeyIdentifier=hash
+authorityKeyIdentifier=keyid:always,issuer:always
+
+[req]
+req_extensions = v3_req
+distinguished_name = dn
+prompt = no
+
+[dn]
+CN = $(COMMON_NAME)
+C  = FR
+ST = FR
+L  = PARIS
+O  = absmach
+OU = absmach
+
+[v3_req]
+basicConstraints = CA:FALSE
+keyUsage = nonRepudiation, digitalSignature, keyEncipherment
+subjectAltName = @alt_names
+
+[alt_names]
+DNS.1 = $(COMMON_NAME)
+endef
+
+
+.PHONY: all clean_certs client_cert client_cert_revoked client_cert_unknown ca
+
+# Generate all client certificates
+all: clean_certs ca client_cert client_cert_revoked client_cert_unknown
+
+ca:
+	openssl req -newkey rsa:2048 -x509 -nodes -sha512 -days 1095 \
+				-keyout $(CRT_LOCATION)/ca.key -out $(CRT_LOCATION)/ca.crt -subj "/CN=$(CN_CA)/O=$(O)/OU=$(OU_CA)/emailAddress=$(EA)"
+
+client_cert:
+	# Create absmach client key and CSR.
+	openssl req -new -sha256 -newkey rsa:4096 -nodes -keyout $(CRT_LOCATION)/$(CRT_FILE_NAME).key \
+				-out $(CRT_LOCATION)/$(CRT_FILE_NAME).csr -subj "/CN=$(CLIENT_CN)/O=$(O)/OU=$(OU_CRT)/emailAddress=$(EA)"
+
+	# Sign client CSR.
+	openssl x509 -req -days 730 -in $(CRT_LOCATION)/$(CRT_FILE_NAME).csr -CA $(CRT_LOCATION)/ca.crt -CAkey $(CRT_LOCATION)/ca.key -CAcreateserial -out $(CRT_LOCATION)/$(CRT_FILE_NAME).crt
+
+	# Remove CSR.
+	rm $(CRT_LOCATION)/$(CRT_FILE_NAME).csr
+
+clean_certs:
+	rm -f $(CRT_LOCATION)/*.crt
+	rm -f $(CRT_LOCATION)/*.key
+	rm -f $(CRT_LOCATION)/*.srl
diff --git a/ssl/certs/ca.crt b/ssl/certs/ca.crt
new file mode 100644
index 0000000..66b21d5
--- /dev/null
+++ b/ssl/certs/ca.crt
@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/ssl/certs/ca.key b/ssl/certs/ca.key
new file mode 100644
index 0000000..5ae37d4
--- /dev/null
+++ b/ssl/certs/ca.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/ssl/certs/ca.srl b/ssl/certs/ca.srl
new file mode 100644
index 0000000..b4ff21e
--- /dev/null
+++ b/ssl/certs/ca.srl
@@ -0,0 +1 @@
+63394BC07145D7006696CBA3DA6B37DC4DB06EDF
diff --git a/ssl/certs/client.crt b/ssl/certs/client.crt
new file mode 100644
index 0000000..cb0bcc0
--- /dev/null
+++ b/ssl/certs/client.crt
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/ssl/certs/client.key b/ssl/certs/client.key
new file mode 100644
index 0000000..7dc9ac0
--- /dev/null
+++ b/ssl/certs/client.key
@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQCw7nhvJRvt4bFS
+meMY2bMxyRyOV14LYhYugH0o0BukkEZ/M3yMfBiQkgHsm3IW5mSw+vgqEyv0gQop
+Zj0lx114mWNPnOnRB0tH9mc+x9VIPyu1sS0ICDM7w62gAyVOWbENPsX5rE/d7MsC
+MC4Q/f7dSFfXvXVh5yJFA1zFG1BKVuIj1j1+2CRSLKwXVK/YN3z3uQTV1owEiaO2
+Hx5oSYQLuJJrJzSa5WovnUn2V4FF8WHrsbqC8KGXXSJl3JP+/oSkqBTJ+sb7JfQZ
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+1NPqfiDMbhVkPtrRNxTFQEX7JHRBSZMQxqCNfNOpSt611LVRNVZ/xkKsb7i8N9EQ
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+50y3pCFUP93k/B1hZ+qvqUNxQh+HraP0q1jAlxlnXetVm2yCXd7mt0wzbgTsbgxw
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+K4/+TKWv4rRs0XcjUVo+DySCL9pJB2GwbfYkvSgiiA1jCLUHj6GtNzazVR2gDWiH
+7xS/j02e2glf2H1+McqKH6mZFI2XaFBY0VlcOKpr+CgwAdPX/lptc01kYnc0T8Rf
+PDHawqCfMm8HfZ3KTefCFBZ0iB3m4i3ZO9usw4ECggEBAKVNYnXGRMUaHsNmv/4x
+fCRJpQnIRBQP8v9KdGziM2nunzimo7hWyRp8AGnvua4H5Pftyk1vZActVnyU/Kb3
+8Gz9bI/defbXLM7D57eMkGsdYOi/WTtISLZztZS40Fg/dHC6hU89JLbwd/uu6Esb
+19AMfGcCwyFQDP+uIoVOUDVtY2C7FV0MQAp4xjHq20MMJhfyEN7EqY4PdTkLk7Di
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+5BmBRe6b3tf8BjjvDYag7wD6H2+tlOIS4E9U80VXVlLBAscOXoUqYeEbjjmuPfmr
+SCkCggEAEBmoOU5ICMQLJtKy51E3m3m2XzBqRosou/QUk1LYNDR+cxFXbLXDaxRy
+r8izr6/bmv8dfasvgClYJGd/xR0335ue4hjMipcv2PotrrqjbWYf8JrVZ6Z7FFcS
+S37a+vPpHBSeuzPzQ4ebB3Oxy9kKhhoUQt318NDRtOCZhds9GJppCC70o7NL9Nr7
+46CBkb1bq9zeTvXjsoZYCd5X1bmL+JsE9dn/hjNqI/r12t77YTMw3DL5XM/+Usc5
+TCsMTrcYVAETOVxN0xSKD3lTZUxYSlMhhK9ljPxC1OQhCC13G6DsTgL4eIvlToch
+nLIYGRGy7V3HLlv59yeXP+2NCSh9qA==
+-----END PRIVATE KEY-----

From e4a508544f38a67a409b8b519353d8c634f5b384 Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 14:16:09 +0300
Subject: [PATCH 05/12] fix(ci): change base branch to master

---
 .github/workflows/ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 38431d5..aab5ba1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,10 +6,10 @@ name: Continuous Integration
 on:
   pull_request:
     branches:
-      - master
+      - main
   push:
     branches:
-      - master
+      - main
 
 jobs:
   lint-and-build:

From 43fde7b3e788220af563e424d1e7c2f937bb5348 Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 14:22:20 +0300
Subject: [PATCH 06/12] chore: update golangci-linter

---
 .golangci.yml | 125 +++++++++++++++++++++++++++++---------------------
 1 file changed, 72 insertions(+), 53 deletions(-)

diff --git a/.golangci.yml b/.golangci.yml
index c6c8f3b..66db170 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -1,75 +1,94 @@
 # Copyright (c) Abstract Machines
 # SPDX-License-Identifier: Apache-2.0
 
+version: "2"
 run:
   concurrency: 4
-  timeout: 1m
-
-linters-settings:
-  importas:
-    no-unaliased: true
-    no-extra-aliases: false
-  gocritic:
-    enabled-checks:
-      - importShadow
-      - httpNoBody
-      - paramTypeCombine
-      - emptyStringTest
-      - builtinShadow
-      - exposedSyncMutex
-    disabled-checks:
-      - appendAssign
-    enabled-tags:
-      - diagnostic
-    disabled-tags:
-      - performance
-      - style
-      - experimental
-      - opinionated
-  stylecheck:
-    checks: ["-ST1000", "-ST1003", "-ST1020", "-ST1021", "-ST1022"]
-  goheader:
-    template: |-
-      Copyright (c) Abstract Machines
-      SPDX-License-Identifier: Apache-2.0
-
 linters:
-  disable-all: true
-  fast: true
+  default: none
   enable:
-    - gocritic
-    - gosimple
-    - errcheck
-    - govet
-    - unused
-    - goconst
-    - godot
-    - godox
-    - ineffassign
-    - misspell
-    - stylecheck
-    - whitespace
-    - gci
-    - gofmt
-    - goimports
-    - loggercheck
-    - goheader
     - asasalint
     - asciicheck
     - bidichk
     - contextcheck
+    - copyloopvar
     - decorder
     - dogsled
+    - dupword
+    - errcheck
     - errchkjson
     - errname
-    - execinquery
-    - exportloopref
     - ginkgolinter
     - gocheckcompilerdirectives
-    - gofumpt
+    - goconst
+    - gocritic
+    - godot
+    - godox
+    - goheader
     - goprintffuncname
+    - govet
     - importas
+    - ineffassign
+    - loggercheck
     - makezero
     - mirror
+    - misspell
     - nakedret
-    - dupword
+    - staticcheck
+    - unused
+    - whitespace
+  settings:
+    gocritic:
+      enabled-checks:
+        - importShadow
+        - httpNoBody
+        - paramTypeCombine
+        - emptyStringTest
+        - builtinShadow
+        - exposedSyncMutex
+      disabled-checks:
+        - appendAssign
+      enabled-tags:
+        - diagnostic
+      disabled-tags:
+        - performance
+        - style
+        - experimental
+        - opinionated
+    goheader:
+      template: |-
+        Copyright (c) Abstract Machines
+        SPDX-License-Identifier: Apache-2.0
+    importas:
+      no-unaliased: true
+      no-extra-aliases: false
+    staticcheck:
+      checks:
+        - -ST1000
+        - -ST1003
+        - -ST1020
+        - -ST1021
+        - -ST1022
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gci
+    - gofmt
+    - gofumpt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

From 297f0153bafe2eaa7c713dec6acfe001492b952c Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 14:22:54 +0300
Subject: [PATCH 07/12] chore(dependabot): group gh and go dependencies

---
 .github/dependabot.yml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 98e103a..f6bc93e 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -7,8 +7,20 @@ updates:
     directory: ".github/workflows"
     schedule:
       interval: "monthly"
+      day: "monday"
+      timezone: "Europe/Paris"
+    groups:
+      gh-dependency:
+        patterns:
+          - "*"
 
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
       interval: "monthly"
+      day: "monday"
+      timezone: "Europe/Paris"
+    groups:
+      go-dependency:
+        patterns:
+          - "*"

From 5fa4878b30d78e92d1a6adfce11b817cf72d609b Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 14:23:54 +0300
Subject: [PATCH 08/12] chore: update CI and go version to 1.25

---
 .github/workflows/ci.yml | 9 +++++----
 go.mod                   | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aab5ba1..1d9af94 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,18 +18,19 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.22.x
+          go-version: 1.25.x
           cache-dependency-path: "go.sum"
 
       - name: Check linting
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v8
         with:
-          version: v1.56.2
+          version: v2.4.0
+          args: --config ./.golangci.yml
 
       - name: Build Binaries
         run: |
diff --git a/go.mod b/go.mod
index 09ff87e..cf8ddf5 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/absmach/coap-cli
 
-go 1.24
+go 1.25.0
 
 require (
 	github.com/fatih/color v1.18.0

From f564d3e886670d5834b89abcfd1fd653d540ee17 Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 14:43:30 +0300
Subject: [PATCH 09/12] chore: update dependencies

---
 coap/client.go |  2 +-
 go.mod         | 16 +++++++---------
 go.sum         | 36 +++++++++++++++++-------------------
 main.go        |  2 +-
 4 files changed, 26 insertions(+), 30 deletions(-)

diff --git a/coap/client.go b/coap/client.go
index 53f91f0..d2a892d 100644
--- a/coap/client.go
+++ b/coap/client.go
@@ -11,7 +11,7 @@ import (
 	"log"
 	"time"
 
-	piondtls "github.com/pion/dtls/v2"
+	piondtls "github.com/pion/dtls/v3"
 	"github.com/plgd-dev/go-coap/v3/dtls"
 	"github.com/plgd-dev/go-coap/v3/message"
 	"github.com/plgd-dev/go-coap/v3/message/codes"
diff --git a/go.mod b/go.mod
index cf8ddf5..24f1c8d 100644
--- a/go.mod
+++ b/go.mod
@@ -4,26 +4,24 @@ go 1.25.0
 
 require (
 	github.com/fatih/color v1.18.0
-	github.com/pion/dtls/v2 v2.2.8-0.20240501061905-2c36d63320a0
+	github.com/pion/dtls/v3 v3.0.7
 	github.com/plgd-dev/go-coap/v3 v3.4.0
-	github.com/spf13/cobra v1.9.1
+	github.com/spf13/cobra v1.10.1
 )
 
 require (
-	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dsnet/golib/memfile v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/pion/dtls/v3 v3.0.6 // indirect
 	github.com/pion/logging v0.2.4 // indirect
 	github.com/pion/transport/v3 v3.0.7 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/spf13/pflag v1.0.7 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
-	golang.org/x/crypto v0.40.0 // indirect
-	golang.org/x/exp v0.0.0-20250718183923-645b1fa84792 // indirect
-	golang.org/x/net v0.42.0 // indirect
+	golang.org/x/crypto v0.41.0 // indirect
+	golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b // indirect
+	golang.org/x/net v0.43.0 // indirect
 	golang.org/x/sync v0.16.0 // indirect
-	golang.org/x/sys v0.34.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 32509e8..cd99a91 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,6 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
-github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+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/dsnet/golib/memfile v1.0.0 h1:J9pUspY2bDCbF9o+YGwcf3uG6MdyITfh/Fk3/CaEiFs=
 github.com/dsnet/golib/memfile v1.0.0/go.mod h1:tXGNW9q3RwvWt1VV2qrRKlSSz0npnh12yftCSCy2T64=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
@@ -11,10 +11,8 @@ github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHP
 github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stgPZH1UqBm1s8=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/pion/dtls/v2 v2.2.8-0.20240501061905-2c36d63320a0 h1:050ahk2K4HqwxPi2YM6Yc4lIttwNSY2+n9xPVsS3zoQ=
-github.com/pion/dtls/v2 v2.2.8-0.20240501061905-2c36d63320a0/go.mod h1:tjBBbkwKGSQQZl36HQa2va5HqR9rWhujhlJMrgE2b/o=
-github.com/pion/dtls/v3 v3.0.6 h1:7Hkd8WhAJNbRgq9RgdNh1aaWlZlGpYTzdqjy9x9sK2E=
-github.com/pion/dtls/v3 v3.0.6/go.mod h1:iJxNQ3Uhn1NZWOMWlLxEEHAN5yX7GyPvvKw04v9bzYU=
+github.com/pion/dtls/v3 v3.0.7 h1:bItXtTYYhZwkPFk4t1n3Kkf5TDrfj6+4wG+CZR8uI9Q=
+github.com/pion/dtls/v3 v3.0.7/go.mod h1:uDlH5VPrgOQIw59irKYkMudSFprY9IEFCqz/eTz16f8=
 github.com/pion/logging v0.2.4 h1:tTew+7cmQ+Mc1pTBLKH2puKsOvhm32dROumOZ655zB8=
 github.com/pion/logging v0.2.4/go.mod h1:DffhXTKYdNZU+KtJ5pyQDjvOAh/GsNSyv1lbkFbe3so=
 github.com/pion/transport/v3 v3.0.7 h1:iRbMH05BzSNwhILHoBoAPxoB9xQgOaJk+591KC9P1o0=
@@ -24,26 +22,26 @@ github.com/plgd-dev/go-coap/v3 v3.4.0/go.mod h1:azpceqoHFeGzzNVm3RX4ox6xKHLOJ+pD
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
-github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
-github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/pflag v1.0.7 h1:vN6T9TfwStFPFM5XzjsvmzZkLuaLX+HS+0SeFLRgU6M=
-github.com/spf13/pflag v1.0.7/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
+github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0=
+github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
+github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
 go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
-golang.org/x/crypto v0.40.0 h1:r4x+VvoG5Fm+eJcxMaY8CQM7Lb0l1lsmjGBQ6s8BfKM=
-golang.org/x/crypto v0.40.0/go.mod h1:Qr1vMER5WyS2dfPHAlsOj01wgLbsyWtFn/aY+5+ZdxY=
-golang.org/x/exp v0.0.0-20250718183923-645b1fa84792 h1:R9PFI6EUdfVKgwKjZef7QIwGcBKu86OEFpJ9nUEP2l4=
-golang.org/x/exp v0.0.0-20250718183923-645b1fa84792/go.mod h1:A+z0yzpGtvnG90cToK5n2tu8UJVP2XUATh+r+sfOOOc=
-golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
-golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
+golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
+golang.org/x/crypto v0.41.0/go.mod h1:pO5AFd7FA68rFak7rOAGVuygIISepHftHnr8dr6+sUc=
+golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b h1:DXr+pvt3nC887026GRP39Ej11UATqWDmWuS99x26cD0=
+golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b/go.mod h1:4QTo5u+SEIbbKW1RacMZq1YEfOBqeXa19JeshGi+zc4=
+golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
+golang.org/x/net v0.43.0/go.mod h1:vhO1fvI4dGsIjh73sWfUVjj3N7CA9WkKJNQm2svM6Jg=
 golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
 golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
-golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/main.go b/main.go
index 83dbe7e..7544af2 100644
--- a/main.go
+++ b/main.go
@@ -20,7 +20,7 @@ import (
 
 	coap "github.com/absmach/coap-cli/coap"
 	"github.com/fatih/color"
-	piondtls "github.com/pion/dtls/v2"
+	piondtls "github.com/pion/dtls/v3"
 	coapmsg "github.com/plgd-dev/go-coap/v3/message"
 	"github.com/plgd-dev/go-coap/v3/message/codes"
 	"github.com/plgd-dev/go-coap/v3/message/pool"

From f1158176eb8592e7065a5b40a03facbf1d5d74fa Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 15:16:01 +0300
Subject: [PATCH 10/12] refactor: remove examples

---
 examples/coapme/test.sh | 40 --------------------------
 ssl/Makefile            | 64 -----------------------------------------
 ssl/certs/ca.crt        | 22 --------------
 ssl/certs/ca.key        | 28 ------------------
 ssl/certs/ca.srl        |  1 -
 ssl/certs/client.crt    | 26 -----------------
 ssl/certs/client.key    | 52 ---------------------------------
 7 files changed, 233 deletions(-)
 delete mode 100755 examples/coapme/test.sh
 delete mode 100644 ssl/Makefile
 delete mode 100644 ssl/certs/ca.crt
 delete mode 100644 ssl/certs/ca.key
 delete mode 100644 ssl/certs/ca.srl
 delete mode 100644 ssl/certs/client.crt
 delete mode 100644 ssl/certs/client.key

diff --git a/examples/coapme/test.sh b/examples/coapme/test.sh
deleted file mode 100755
index e7bf53f..0000000
--- a/examples/coapme/test.sh
+++ /dev/null
@@ -1,40 +0,0 @@
-host="coap.me"
-port="5683"
-testPath="/test"
-largePath="/large"
-etagPath="/etag"
-payload="Hello world from absmach/coap-cli"
-
-#Get
-echo "Sending GET request to $host:$port$testPath"
-coap-cli get $testPath -H $host -p $port
-sleep 1
-
-#Get with blockwise transfer
-echo "Sending GET request with blockwise transfer to $host:$port$testPath"
-coap-cli get $largePath -H $host -p $port
-sleep 1
-
-#Post
-echo "Sending POST request to $host:$port$testPath"
-coap-cli post $testPath -H $host -p $port -d $payload 
-sleep 1
-
-#Post with content format
-echo "Sending POST request with content format to $host:$port$testPath"
-coap-cli post $testPath -H $host -p $port -d $payload -c 50
-sleep 1
-
-#Post with authentication
-echo "Sending POST request with authentication to $host:$port$testPath"
-coap-cli post $testPath -H $host -p $port -d $payload --auth "test"
-sleep 1
-
-#Put
-echo "Sending PUT request to $host:$port$testPath"
-coap-cli put $testPath -H $host -p $port -d $payload
-sleep 1
-
-#Delete
-echo "Sending DELETE request to $host:$port$testPath"
-coap-cli delete $testPath -H $host -p $port
diff --git a/ssl/Makefile b/ssl/Makefile
deleted file mode 100644
index b5e8359..0000000
--- a/ssl/Makefile
+++ /dev/null
@@ -1,64 +0,0 @@
-# Copyright (c) Abstract Machines
-# SPDX-License-Identifier: Apache-2.0
-
-CRT_LOCATION = certs
-O = absmach
-OU_CA = absmach_ca
-OU_CRT = absmach_crt
-EA = info@absmach.com
-CLIENT_CN = coap-cli-client
-CRT_FILE_NAME = client
-CN_CA = Absmach_Self_Signed_CA
-
-define CERT_CONFIG
-[ca]
-subjectKeyIdentifier=hash
-authorityKeyIdentifier=keyid:always,issuer:always
-
-[req]
-req_extensions = v3_req
-distinguished_name = dn
-prompt = no
-
-[dn]
-CN = $(COMMON_NAME)
-C  = FR
-ST = FR
-L  = PARIS
-O  = absmach
-OU = absmach
-
-[v3_req]
-basicConstraints = CA:FALSE
-keyUsage = nonRepudiation, digitalSignature, keyEncipherment
-subjectAltName = @alt_names
-
-[alt_names]
-DNS.1 = $(COMMON_NAME)
-endef
-
-
-.PHONY: all clean_certs client_cert client_cert_revoked client_cert_unknown ca
-
-# Generate all client certificates
-all: clean_certs ca client_cert client_cert_revoked client_cert_unknown
-
-ca:
-	openssl req -newkey rsa:2048 -x509 -nodes -sha512 -days 1095 \
-				-keyout $(CRT_LOCATION)/ca.key -out $(CRT_LOCATION)/ca.crt -subj "/CN=$(CN_CA)/O=$(O)/OU=$(OU_CA)/emailAddress=$(EA)"
-
-client_cert:
-	# Create absmach client key and CSR.
-	openssl req -new -sha256 -newkey rsa:4096 -nodes -keyout $(CRT_LOCATION)/$(CRT_FILE_NAME).key \
-				-out $(CRT_LOCATION)/$(CRT_FILE_NAME).csr -subj "/CN=$(CLIENT_CN)/O=$(O)/OU=$(OU_CRT)/emailAddress=$(EA)"
-
-	# Sign client CSR.
-	openssl x509 -req -days 730 -in $(CRT_LOCATION)/$(CRT_FILE_NAME).csr -CA $(CRT_LOCATION)/ca.crt -CAkey $(CRT_LOCATION)/ca.key -CAcreateserial -out $(CRT_LOCATION)/$(CRT_FILE_NAME).crt
-
-	# Remove CSR.
-	rm $(CRT_LOCATION)/$(CRT_FILE_NAME).csr
-
-clean_certs:
-	rm -f $(CRT_LOCATION)/*.crt
-	rm -f $(CRT_LOCATION)/*.key
-	rm -f $(CRT_LOCATION)/*.srl
diff --git a/ssl/certs/ca.crt b/ssl/certs/ca.crt
deleted file mode 100644
index 66b21d5..0000000
--- a/ssl/certs/ca.crt
+++ /dev/null
@@ -1,22 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIDszCCApugAwIBAgIULa101cRg3Vvf+M/fLHj8pYTJIyEwDQYJKoZIhvcNAQEN
-BQAwaTEfMB0GA1UEAwwWQWJzbWFjaF9TZWxmX1NpZ25lZF9DQTEQMA4GA1UECgwH
-YWJzbWFjaDETMBEGA1UECwwKYWJzbWFjaF9jYTEfMB0GCSqGSIb3DQEJARYQaW5m
-b0BhYnNtYWNoLmNvbTAeFw0yNDA1MDcwODUyMTFaFw0yNzA1MDcwODUyMTFaMGkx
-HzAdBgNVBAMMFkFic21hY2hfU2VsZl9TaWduZWRfQ0ExEDAOBgNVBAoMB2Fic21h
-Y2gxEzARBgNVBAsMCmFic21hY2hfY2ExHzAdBgkqhkiG9w0BCQEWEGluZm9AYWJz
-bWFjaC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCrtBFpQ4SB
-5QCN/kgl3974UvUe/mcar1AEnR3rBRRdpQV4fxifDN/GBzuYt0xhfaQcPNBX8pL1
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-l/DG4qvSd+kuGWk8G/pnab4OOS+nFtWosddFoZ52MIzrYxjloMCWAzgz2Ah/lO3Z
-2qsf2LKMnzDnV1GD4MjSeep4cZWY6xWyrsGK/VA8vcqLvBURZ6udeLvXaQ4hPkwa
-UfdnALWx/1/zsc6q6oFEDyVmMt+0njLixY2grA1o3Lz4q6hCVgtv
------END CERTIFICATE-----
diff --git a/ssl/certs/ca.key b/ssl/certs/ca.key
deleted file mode 100644
index 5ae37d4..0000000
--- a/ssl/certs/ca.key
+++ /dev/null
@@ -1,28 +0,0 @@
------BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCrtBFpQ4SB5QCN
-/kgl3974UvUe/mcar1AEnR3rBRRdpQV4fxifDN/GBzuYt0xhfaQcPNBX8pL1luhH
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-4MMG33fBCb+YGESmXU4TzKorPSUsDz26J0teGvSCOy9CvF7SI4ci7nYcxRc6MTNi
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-w3iJSosAuiC4KJjmo+AHbP6toGlbtCzH8E/WENGBxjB9umjgwCTIMi9aTdxtbGvB
-FZCgAhwVNg0KW9NmvAaq8xZJKjbxgorijX3itXGr5+Su/qadruyA9LL2QQ6vQgF6
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-qlyePXrUzoo2BdJ5dBykzeMCjtm3QyZI1EHLHn2SCRBpIgs9Qc2cAgYCNwamAws2
-lmg52kH9C1gAwNIB6KLkj/g=
------END PRIVATE KEY-----
diff --git a/ssl/certs/ca.srl b/ssl/certs/ca.srl
deleted file mode 100644
index b4ff21e..0000000
--- a/ssl/certs/ca.srl
+++ /dev/null
@@ -1 +0,0 @@
-63394BC07145D7006696CBA3DA6B37DC4DB06EDF
diff --git a/ssl/certs/client.crt b/ssl/certs/client.crt
deleted file mode 100644
index cb0bcc0..0000000
--- a/ssl/certs/client.crt
+++ /dev/null
@@ -1,26 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIEUzCCAzsCFGM5S8BxRdcAZpbLo9prN9xNsG7fMA0GCSqGSIb3DQEBCwUAMGkx
-HzAdBgNVBAMMFkFic21hY2hfU2VsZl9TaWduZWRfQ0ExEDAOBgNVBAoMB2Fic21h
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-i2VF+6F7SpxofwJqtGobITcS22Qr0PH1eUBrKg8TR9v9VCB2wh/x2+OfuEbgvfHE
-cxvkbUuphw==
------END CERTIFICATE-----
diff --git a/ssl/certs/client.key b/ssl/certs/client.key
deleted file mode 100644
index 7dc9ac0..0000000
--- a/ssl/certs/client.key
+++ /dev/null
@@ -1,52 +0,0 @@
------BEGIN PRIVATE KEY-----
-MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQCw7nhvJRvt4bFS
-meMY2bMxyRyOV14LYhYugH0o0BukkEZ/M3yMfBiQkgHsm3IW5mSw+vgqEyv0gQop
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-nLIYGRGy7V3HLlv59yeXP+2NCSh9qA==
------END PRIVATE KEY-----

From cd54944e90f76142ae2dc2a46c7fb8942645fa2c Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 15:17:29 +0300
Subject: [PATCH 11/12] refactor: cleanup dependencies

---
 go.mod | 1 -
 go.sum | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/go.mod b/go.mod
index 24f1c8d..0205d25 100644
--- a/go.mod
+++ b/go.mod
@@ -16,7 +16,6 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/pion/logging v0.2.4 // indirect
 	github.com/pion/transport/v3 v3.0.7 // indirect
-	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	golang.org/x/crypto v0.41.0 // indirect
diff --git a/go.sum b/go.sum
index cd99a91..cd6d0c2 100644
--- a/go.sum
+++ b/go.sum
@@ -19,8 +19,8 @@ github.com/pion/transport/v3 v3.0.7 h1:iRbMH05BzSNwhILHoBoAPxoB9xQgOaJk+591KC9P1
 github.com/pion/transport/v3 v3.0.7/go.mod h1:YleKiTZ4vqNxVwh77Z0zytYi7rXHl7j6uPLGhhz9rwo=
 github.com/plgd-dev/go-coap/v3 v3.4.0 h1:ZoGYFDv94xboP+41yW458fLDuYui+4eTgamqp3XJ7k4=
 github.com/plgd-dev/go-coap/v3 v3.4.0/go.mod h1:azpceqoHFeGzzNVm3RX4ox6xKHLOJ+pD0emPpr7FDXA=
-github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
-github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
 github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0=

From 97e2ed38dd7cc60e67d77f2be396beae7dff2436 Mon Sep 17 00:00:00 2001
From: Rodney Osodo <socials@rodneyosodo.com>
Date: Fri, 5 Sep 2025 15:17:45 +0300
Subject: [PATCH 12/12] fix(Makefile): change command used to build cli

---
 Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 8ce8e73..80865ed 100644
--- a/Makefile
+++ b/Makefile
@@ -10,13 +10,13 @@ BUILD_FLAGS=-ldflags "-s -w"
 all: linux darwin windows
 
 linux:
-	CGO_ENABLED=0 GOOS=linux go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-linux cmd/main.go
+	CGO_ENABLED=0 GOOS=linux go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-linux main.go
 
 darwin:
-	CGO_ENABLED=0 GOOS=darwin go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-darwin cmd/main.go
+	CGO_ENABLED=0 GOOS=darwin go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-darwin main.go
 
 windows:
-	CGO_ENABLED=0 GOOS=windows go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-windows cmd/main.go
+	CGO_ENABLED=0 GOOS=windows go build $(BUILD_FLAGS) -o $(BUILD_DIR)/coap-cli-windows main.go
 	
 install: install-linux