protocol fixes

member.c

@@ -99,7 +99,7 @@ int member_join(char *buffer) {
             break;
         case ISSUERPUB:
             if (0 == strncasecmp("PUBLISH", buffer, 7)) {
-                printf("ISSUER > MEMBER: %s", buffer);
+                printf("ISSUER > MEMBER: %s\n", buffer);
                 uint8_t binbuf[MAX_BUFSIZE];
                 char *current = &buffer[8];
                 ecdaa_decode(current, binbuf, ECDAA_ISSUER_PUBLIC_KEY_FP256BN_LENGTH);
@@ -124,7 +124,7 @@ int member_join(char *buffer) {
             break;
         case APPEND:
             if (0 == strncasecmp("JOINSTART", buffer, 9)) {
-                printf("ISSUER > MEMBER: %s", buffer);
+                printf("ISSUER > MEMBER: %s\n", buffer);
                 member_joinappend(buffer);
                 member.state = JOINPROCEED;
             } else {
@@ -135,7 +135,7 @@ int member_join(char *buffer) {
             break;
         case JOINPROCEED:
             if (0 == strncasecmp("JOINPROCEED", buffer, 11)) {
-                printf("ISSUER > MEMBER: %s", buffer);
+                printf("ISSUER > MEMBER: %s\n", buffer);
                 member_joinfinish(buffer);
                 member.state = JOINED;
                 ret = 1;
@@ -258,11 +258,14 @@ int member_joinfinish(char *buffer) {
     bincur = &binbuf[ECDAA_CREDENTIAL_FP256BN_LENGTH];
     ecdaa_decode(current, bincur, ECDAA_CREDENTIAL_FP256BN_SIGNATURE_LENGTH);
     ret = ecdaa_credential_FP256BN_deserialize_with_signature(&member.cred, &member.mpk, &member.ipk.gpk, binbuf, bincur);
+    bzero(buffer, MAX_BUFSIZE);
     if(-1 == ret) {
         printf("member_joinfinish: credential is malformed!\n");
+        strncpy(buffer, "ERR", 3);
         ret = -1;
     } else if(-2 == ret) {
         printf("member_joinfinish: siganture of credential is invalid\n");
+        strncpy(buffer, "ERR", 3);
         ret = -1;
     }
     printf("member_joinfinish: writing key-pair and credential to disk\n");
@@ -270,9 +273,11 @@ int member_joinfinish(char *buffer) {
             0 != ecdaa_member_secret_key_FP256BN_serialize_file(member_secret_key_file, &member.msk) || 
             0 != ecdaa_credential_FP256BN_serialize_file(member_credential_file, &member.cred)) {
         printf("issuer_setup: Error saving key-pair or credential to disk\n");
-        return -1;
+        strncpy(buffer, "ERR", 3);
+        ret = -1;
+    } else {
+        strncpy(buffer, "OK", 2);
     }
-
     return ret;
 }
 

server.c

@@ -66,9 +66,8 @@ int server_start(conn_handler handler, int16_t port) {
 
                 if (0 <= ret && 0 >= write(clientfd, buffer, strlen(buffer))) {
                     printf("server_start: cannot write to socket\n");
-                    ret = -1;
+                    ret = 1;
                 }
-
             }
             if (0 != close(clientfd)) {
                 printf("server_start: failed to close client connection properly\n");