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Add guards for closed socket in net.c

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This is particularly problematic when calling FD_SET( -1, ... ), but let's
check it in all functions.

This was introduced with the new API and the fact the net_free() now sets the
internal fd to -1 in order to mark it as closed: now using this information.
This commit is contained in:
Manuel Pégourié-Gonnard
2015-07-01 19:03:27 +02:00
parent 046589e424
commit 9bd0afdb22
4 changed files with 19 additions and 3 deletions
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library/error.c
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@ -640,6 +640,8 @@ void mbedtls_strerror( int ret, char *buf, size_t buflen )
mbedtls_snprintf( buf, buflen, "NET - Failed to get an IP address for the given hostname" );
if( use_ret == -(MBEDTLS_ERR_NET_BUFFER_TOO_SMALL) )
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" );
#endif /* MBEDTLS_NET_C */
#if defined(MBEDTLS_OID_C)