buglwIP - A Lightweight TCP/IP stack - Bugs: bug #65040, Compilation error when...


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bug #65040: Compilation error when MBEDTLS_HAVE_TIME is not defined

Submitter:  flashything
Submitted:  Sat 16 Dec 2023 01:14:30 PM UTC
Category:  None Severity:  3 - Normal
Item Group:  Compiler Warning Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
lwIP version:  2.2.0

Sat 16 Dec 2023 01:14:30 PM UTC, original submission:  

To save space I don't use time functions in mbedtls, so MBEDTLS_HAVE_TIME is disabled. Thus the variable "start" in mbedtls_ssl_session is also not defined in mbedtls/ssl.h:

struct mbedtls_ssl_session {
#if defined(MBEDTLS_HAVE_TIME)
    mbedtls_time_t start;       /*!< starting time      */

Then the compilation of altcp_tls_set_session in altcp_tls_mbedtls.c fails, because there is a check of "session->data.start":

altcp_tls_set_session(struct altcp_pcb *conn, struct altcp_tls_session *session)
    if (session->data.start)
      ret = mbedtls_ssl_set_session(&state->ssl_context, &session->data);

A possible patch could be testing "id_len" instead of "start":

--- a/src/apps/altcp_tls/altcp_tls_mbedtls.c
+++ b/src/apps/altcp_tls/altcp_tls_mbedtls.c
@@ -683,7 +683,7 @@ altcp_tls_set_session(struct altcp_pcb *conn, struct altcp_tls_session *session)
   if (session && conn && conn->state) {
     altcp_mbedtls_state_t *state = (altcp_mbedtls_state_t *)conn->state;
     int ret = -1;
-    if (session->data.start)
+    if (session->data.id_len)
       ret = mbedtls_ssl_set_session(&state->ssl_context, &session->data);
     return ret < 0 ? ERR_VAL : ERR_OK;



(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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