refine the log

src/encrypt.c

@@ -1233,7 +1233,7 @@ char * ss_decrypt_all(int buf_size, char *ciphertext, ssize_t *len, int method,
         size_t c_len = *len, p_len = *len - iv_len;
         int ret = 1;
 
-        if (*len < iv_len) {
+        if (*len <= iv_len) {
             return NULL;
         }
 

src/udprelay.c

@@ -653,7 +653,7 @@ static void remote_recv_cb(EV_P_ ev_io *w, int revents)
 #ifdef UDPRELAY_LOCAL
     buf = ss_decrypt_all(BUF_SIZE, buf, &buf_len, server_ctx->method, 0);
     if (buf == NULL) {
-        ERROR("[udp] server_ss_decrypt_all");
+        LOGE("[udp] server_ss_decrypt_all");
         goto CLEAN_UP;
     }
 
@@ -835,7 +835,7 @@ static void server_recv_cb(EV_P_ ev_io *w, int revents)
 
     buf = ss_decrypt_all(BUF_SIZE, buf, &buf_len, server_ctx->method, server_ctx->auth);
     if (buf == NULL) {
-        ERROR("[udp] server_ss_decrypt_all");
+        LOGE("[udp] server_ss_decrypt_all");
         goto CLEAN_UP;
     }
 #endif