修复bug

src/dtls_srtp.c

@@ -177,9 +177,7 @@ int dtls_srtp_init(DtlsSrtp* dtls_srtp, DtlsSrtpRole role, void* user_data) {
 
   mbedtls_ssl_conf_verify(&dtls_srtp->conf, dtls_srtp_cert_verify, NULL);
 
-//  mbedtls_ssl_conf_authmode(&dtls_srtp->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
-  // 忽略证书验证部分工作
-  mbedtls_ssl_conf_authmode(&dtls_srtp->conf, VERIFY_OPTIONAL);
+  mbedtls_ssl_conf_authmode(&dtls_srtp->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
   LOGI("mbedtls_ssl_conf_authmode MBEDTLS_SSL_VERIFY_REQUIRED");
   mbedtls_ssl_conf_ca_chain(&dtls_srtp->conf, &dtls_srtp->cert, NULL);