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Allow IP address to be passed into gethostbyname().

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Ensure xNetworkBuffersInitialise() doesn't use a semaphore before it has been tested against NULL.
This commit is contained in:
Richard Barry
2018-02-18 19:58:26 +00:00
parent 7ddb8b342d
commit ff74e7aa63
2 changed files with 35 additions and 23 deletions
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25
FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_DNS.c
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@ -404,18 +404,29 @@ TickType_t xReadTimeOut_ms = 1200U;
as gethostbyname() may be called from different threads */
TickType_t xIdentifier = ( TickType_t )usIdentifier++;
/* If the supplied hostname is IP address, convert it to uint32_t
and return. */
#if( ipconfigINCLUDE_FULL_INET_ADDR == 1 )
{
ulIPAddress = FreeRTOS_inet_addr( pcHostName );
}
#endif /* ipconfigINCLUDE_FULL_INET_ADDR == 1 */
/* If a DNS cache is used then check the cache before issuing another DNS
request. */
#if( ipconfigUSE_DNS_CACHE == 1 )
{
ulIPAddress = FreeRTOS_dnslookup( pcHostName );
if( ulIPAddress != 0 )
if( ulIPAddress == 0UL )
{
FreeRTOS_debug_printf( ( "FreeRTOS_gethostbyname: found '%s' in cache: %lxip\n", pcHostName, ulIPAddress ) );
}
else
{
/* prvGetHostByName will be called to start a DNS lookup. */
ulIPAddress = FreeRTOS_dnslookup( pcHostName );
if( ulIPAddress != 0 )
{
FreeRTOS_debug_printf( ( "FreeRTOS_gethostbyname: found '%s' in cache: %lxip\n", pcHostName, ulIPAddress ) );
}
else
{
/* prvGetHostByName will be called to start a DNS lookup */
}
}
}
#endif /* ipconfigUSE_DNS_CACHE == 1 */