[c][net] Set default timeout for connection

dfssc/sign/create.go

@@ -4,7 +4,6 @@ import (
 	"crypto/sha512"
 	"io/ioutil"
 	"path/filepath"
-	"time"
 
 	"dfss/dfssc/common"
 	"dfss/dfssc/security"
@@ -80,7 +79,7 @@ func (m *CreateManager) sendRequest() (*api.ErrorCode, error) {
 	}
 
 	client := api.NewPlatformClient(conn)
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), net.DefaultTimeout)
 	defer cancel()
 	response, err := client.PostContract(ctx, request)
 	if err != nil {

dfssc/sign/fetch.go

@@ -2,7 +2,6 @@ package sign
 
 import (
 	"io/ioutil"
-	"time"
 
 	"dfss/dfssc/common"
 	"dfss/dfssc/security"
@@ -28,7 +27,7 @@ func FetchContract(fileCA, fileCert, fileKey, addrPort, passphrase, uuid, path s
 		Uuid: uuid,
 	}
 	client := api.NewPlatformClient(conn)
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), net.DefaultTimeout)
 	defer cancel()
 	response, err := client.GetContract(ctx, request)
 	if err != nil {

dfssc/user/authentication.go

@@ -8,6 +8,7 @@ import (
 	"dfss/dfssc/common"
 	"dfss/dfssc/security"
 	pb "dfss/dfssp/api"
+	"dfss/net"
 	"errors"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
@@ -98,7 +99,7 @@ func (m *AuthManager) sendRequest() (*pb.RegisteredUser, error) {
 	}
 
 	// Stop the context if it takes too long for the platform to answer
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), net.DefaultTimeout)
 	defer cancel()
 	response, err := client.Auth(ctx, request)
 	if err != nil {

dfssc/user/register.go

@@ -8,6 +8,7 @@ import (
 	"dfss/dfssc/common"
 	"dfss/dfssc/security"
 	pb "dfss/dfssp/api"
+	"dfss/net"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
@@ -150,7 +151,7 @@ func (m *RegisterManager) sendRequest(certRequest string) (*pb.ErrorCode, error)
 	}
 
 	// Stop the context if it takes too long for the platform to answer
-	ctx, cancel := context.WithTimeout(context.TODO(), 10*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), net.DefaultTimeout)
 	defer cancel()
 	response, err := client.Register(ctx, request)
 	if err != nil {

net/client.go

@@ -13,6 +13,9 @@ import (
 	"google.golang.org/grpc/credentials"
 )
 
+// DefaultTimeout should be used when a non-critical timeout is used in the application.
+const DefaultTimeout = 30 * time.Second
+
 // Connect to a peer.
 //
 // Given parameters cert/key/ca are PEM-encoded array of bytes.
@@ -43,6 +46,7 @@ func Connect(addrPort string, cert *x509.Certificate, key *rsa.PrivateKey, ca *x
 	return grpc.Dial(
 		addrPort,
 		grpc.WithTransportCredentials(&tlsCreds{config: conf}),
+		grpc.WithTimeout(DefaultTimeout),
 	)
 }