Adding support for client side to choose required source ip address

client.go

@@ -10,6 +10,26 @@ import (
 
 // NewClient creates TFTP client for server on address provided.
 func NewClient(addr string) (*Client, error) {
+	a, err := net.ResolveUDPAddr("udp", addr)
+	if err != nil {
+		return nil, fmt.Errorf("resolving address %s: %v", addr, err)
+	}
+	return &Client{
+		addr:      a,
+		timeout:   defaultTimeout,
+		retries:   defaultRetries,
+		localAddr: &net.UDPAddr{},
+	}, nil
+}
+
+// NewClientWithLocalAddr creates TFTP client for server on local ip address laddr provided.
+func NewClientWithLocalAddr(addr string, localaddr string) (*Client, error) {
+	if localaddr == "" {
+		return nil, fmt.Errorf("localaddr is empty")
+	}
+	if net.ParseIP(localaddr) == nil {
+		return nil, fmt.Errorf("provided localaddr: %s is not valid ip addr", localaddr)
+	}
 	a, err := net.ResolveUDPAddr("udp", addr)
 	if err != nil {
 		return nil, fmt.Errorf("resolving address %s: %v", addr, err)
@@ -18,6 +38,10 @@ func NewClient(addr string) (*Client, error) {
 		addr:    a,
 		timeout: defaultTimeout,
 		retries: defaultRetries,
+		localAddr: &net.UDPAddr{
+			IP:   net.ParseIP(localaddr),
+			Port: 0,
+		},
 	}, nil
 }
 
@@ -57,17 +81,18 @@ func (c *Client) RequestTSize(s bool) {
 
 // Client stores data about a single TFTP client
 type Client struct {
-	addr    *net.UDPAddr
-	timeout time.Duration
-	retries int
-	backoff backoffFunc
-	blksize int
-	tsize   bool
+	addr      *net.UDPAddr
+	timeout   time.Duration
+	retries   int
+	backoff   backoffFunc
+	blksize   int
+	tsize     bool
+	localAddr *net.UDPAddr
 }
 
 // Send starts outgoing file transmission. It returns io.ReaderFrom or error.
 func (c Client) Send(filename string, mode string) (io.ReaderFrom, error) {
-	conn, err := net.ListenUDP("udp", &net.UDPAddr{})
+	conn, err := net.ListenUDP("udp", c.localAddr)
 	if err != nil {
 		return nil, err
 	}
@@ -97,7 +122,7 @@ func (c Client) Send(filename string, mode string) (io.ReaderFrom, error) {
 
 // Receive starts incoming file transmission. It returns io.WriterTo or error.
 func (c Client) Receive(filename string, mode string) (io.WriterTo, error) {
-	conn, err := net.ListenUDP("udp", &net.UDPAddr{})
+	conn, err := net.ListenUDP("udp", c.localAddr)
 	if err != nil {
 		return nil, err
 	}

go.mod

@@ -1,7 +1,12 @@
-module github.com/pin/tftp/v3
+module github.com/tejaskumark/tftp/v2
 
 go 1.23.0
 
+retract (
+	v1.0.1 // Contains retractions only.
+	v1.0.0 // Published accidentally.
+)
+
 require golang.org/x/net v0.43.0
 
 require golang.org/x/sys v0.35.0 // indirect

receiver.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/pin/tftp/v3/netascii"
+	"github.com/tejaskumark/tftp/v2/netascii"
 )
 
 // IncomingTransfer provides methods that expose information associated with

sender.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/pin/tftp/v3/netascii"
+	"github.com/tejaskumark/tftp/v2/netascii"
 )
 
 // OutgoingTransfer provides methods to set the outgoing transfer size and