Add polling function for network contexts
This commit adds a function `mbedtls_net_poll` to the network module
allowing to check if a network context is available for read or write.
diff --git a/library/error.c b/library/error.c
index db42381..8977cc4 100644
--- a/library/error.c
+++ b/library/error.c
@@ -654,6 +654,10 @@
mbedtls_snprintf( buf, buflen, "NET - Buffer is too small to hold the data" );
if( use_ret == -(MBEDTLS_ERR_NET_INVALID_CONTEXT) )
mbedtls_snprintf( buf, buflen, "NET - The context is invalid, eg because it was free()ed" );
+ if( use_ret == -(MBEDTLS_ERR_NET_POLL_FAILED) )
+ mbedtls_snprintf( buf, buflen, "NET - Polling the net context failed" );
+ if( use_ret == -(MBEDTLS_ERR_NET_BAD_INPUT_DATA) )
+ mbedtls_snprintf( buf, buflen, "NET - Input invalid" );
#endif /* MBEDTLS_NET_C */
#if defined(MBEDTLS_OID_C)
