Hi everyone,
I’m working on a project that need loopback interface to work properly, but I don’t succeed to use it and I haven’t seen information on the documentation to do so.
My purpose is to configure a socket listening on loopback interface and to connect another socket on this one. When I launch that code, debug output show that it succeeds to set socket in listening mode but ARP failed to find the loopback endpoint, and finally failed to establish a TCP connection.
Calling FreeRTOS_IPInit...
FreeRTOS_AddEndPoint: MAC: 44-46 IPv4: 192.168.2.114
FreeRTOS_AddEndPoint: MAC: 44-46 IPv4: 127.0.0.1
prvIPTask started
PHY ID 7C130
xPhyReset: phyBMCR_RESET 0 ready
+TCP: advertise: 01E1 config 3100
prvEthernetUpdateConfig: LS mask 00 Force 1
Autonego ready: 00000004: full duplex 100 mbit high status
Network buffers: 60 lowest 60
Queue space: lowest 68
Link Status is high
IP-address : 192.168.2.114
End-point : up = yes method static
Net mask : 255.255.255.0
GW : 192.168.2.5
DNS-0 : 118.98.44.100
DNS-1 : 0.0.0.0
Broadcast : 192.168.2.255
MAC address: 00-11-22-33-44-46
IP-address : 127.0.0.1
End-point : up = yes method static
Net mask : 255.0.0.0
GW : 0.0.0.0
DNS-0 : 0.0.0.0
DNS-1 : 0.0.0.0
Broadcast : 127.255.255.255
MAC address: 00-11-22-33-44-46
FreeRTOS_bind: Undefined sin_family
Socket 5000 -> [0.0.0.0]:0 State eCLOSED->eTCP_LISTEN
FreeRTOS_connect: Undefined sin_family
Socket 41379 -> [0.0.0.0]:5000 State eCLOSED->eCONNECT_SYN
FreeRTOS_FindEndPointOnNetMask[4]: No match for 0.0.0.0
ARP for 0.0.0.0 (using 0.0.0.0): rc=2 00-00-00-00-00-00
FreeRTOS_FindEndPointOnNetMask[12]: No match for 0.0.0.0
Connect[0.0.0.0:5000]: next timeout 1: 500 ms
FreeRTOS_FindEndPointOnNetMask[4]: No match for 0.0.0.0
ARP for 0.0.0.0 (using 0.0.0.0): rc=2 00-00-00-00-00-00
FreeRTOS_FindEndPointOnNetMask[12]: No match for 0.0.0.0
Connect[0.0.0.0:5000]: next timeout 2: 500 ms
Network buffers: 60 lowest 59
FreeRTOS_FindEndPointOnNetMask[4]: No match for 0.0.0.0
ARP for 0.0.0.0 (using 0.0.0.0): rc=2 00-00-00-00-00-00
FreeRTOS_FindEndPointOnNetMask[12]: No match for 0.0.0.0
Connect[0.0.0.0:5000]: next timeout 3: 500 ms
Connect: giving up 0.0.0.0:5000
Move from eCONNECT_SYN to eCLOSE_WAIT
Socket 41379 -> [0.0.0.0]:5000 State eCONNECT_SYN->eCLOSE_WAIT
FreeRTOS_connect() stopped due to an error
Failed to connect to local Address
I succeed to establish a TCP connection with the external network using a PC but not to use the loopback interface.
To be sure I have a well configured project I started my project from this example (I can’t put the link to the github project, here is the name STM32_Nucleo_H723ZG_FreeRTOS_TCP.git) and I applied the following patch (I can’t upload the patch so I copy/paste it at the end)
I’m working with following version of libraries :
-
FreeRTOS+TCP commit
7a4957d15aeac0e1da4237f8059b66c35b2de41c -
FreeRTOS commit
18e293723929da31c0395fb4c7f9187474058a6a
I’m not sure about the procedure to follow and I would greatly appreciate some help.
Thanks in advance for your answers !
From 488efa9e1e3f4f6aa046ac8cf19868aac403f391 Mon Sep 17 00:00:00 2001
From: Raphal <gael.raphal@systerel.fr>
Date: Tue, 10 Sep 2024 10:14:35 +0200
Subject: [PATCH] Test to trigger loopback interface with socket API
---
.cproject | 5 +-
.project | 88 +++---------------------
Libraries/Config/FreeRTOSIPConfig.h | 8 ++-
Libraries/FreeRTOS-Plus-CLI/app_main.c | 92 ++++++++++++++++++++++----
4 files changed, 96 insertions(+), 97 deletions(-)
diff --git a/.cproject b/.cproject
index 0f83845..bb0384a 100644
--- a/.cproject
+++ b/.cproject
@@ -96,7 +96,6 @@
<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="FreeRTOS-Kernel"/>
<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="FreeRTOS-Plus-CLI"/>
<entry excluding="tools/tcp_utilities/NTPDemo.c" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="FreeRTOS-Plus-TCP"/>
- <entry excluding="FreeRTOS-Plus-CLI|FreeRTOS-Plus-TCP|FreeRTOS-Kernel" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Libraries"/>
</sourceEntries>
</configuration>
</storageModule>
@@ -170,8 +169,7 @@
</toolChain>
</folderInfo>
<sourceEntries>
- <entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Core"/>
- <entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Drivers"/>
+ <entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name=""/>
</sourceEntries>
</configuration>
</storageModule>
@@ -201,4 +199,5 @@
<resource resourceType="PROJECT" workspacePath="/STM32_Nucleo_H723ZG_FreeRTOS_TCP"/>
</configuration>
</storageModule>
+ <storageModule moduleId="org.eclipse.cdt.internal.ui.text.commentOwnerProjectMappings"/>
</cproject>
\ No newline at end of file
diff --git a/.project b/.project
index b44685f..773e943 100644
--- a/.project
+++ b/.project
@@ -57,7 +57,7 @@
</matcher>
</filter>
<filter>
- <id>1689237943972</id>
+ <id>1725897023013</id>
<name>FreeRTOS-Plus-TCP</name>
<type>5</type>
<matcher>
@@ -66,7 +66,7 @@
</matcher>
</filter>
<filter>
- <id>1689237943999</id>
+ <id>1725897023014</id>
<name>FreeRTOS-Plus-TCP</name>
<type>9</type>
<matcher>
@@ -75,7 +75,7 @@
</matcher>
</filter>
<filter>
- <id>1689237944006</id>
+ <id>1725897023015</id>
<name>FreeRTOS-Plus-TCP</name>
<type>9</type>
<matcher>
@@ -83,42 +83,6 @@
<arguments>1.0-name-matches-false-false-tools</arguments>
</matcher>
</filter>
- <filter>
- <id>1689237631613</id>
- <name>Libraries</name>
- <type>9</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-FreeRTOS-Kernel</arguments>
- </matcher>
- </filter>
- <filter>
- <id>1689237631621</id>
- <name>Libraries</name>
- <type>9</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-Config</arguments>
- </matcher>
- </filter>
- <filter>
- <id>1689237631628</id>
- <name>Libraries</name>
- <type>9</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-FreeRTOS-Plus-TCP</arguments>
- </matcher>
- </filter>
- <filter>
- <id>1689237631633</id>
- <name>Libraries</name>
- <type>9</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-FreeRTOS-Plus-CLI</arguments>
- </matcher>
- </filter>
<filter>
<id>1689229655055</id>
<name>FreeRTOS-Kernel/portable</name>
@@ -146,15 +110,6 @@
<arguments>1.0-name-matches-false-false-tcp_utilities</arguments>
</matcher>
</filter>
- <filter>
- <id>1689225805239</id>
- <name>Libraries/FreeRTOS-Kernel</name>
- <type>5</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-*.c</arguments>
- </matcher>
- </filter>
<filter>
<id>1689229674781</id>
<name>FreeRTOS-Kernel/portable/GCC</name>
@@ -173,24 +128,6 @@
<arguments>1.0-name-matches-false-false-heap_4.c</arguments>
</matcher>
</filter>
- <filter>
- <id>1689225845131</id>
- <name>Libraries/FreeRTOS-Kernel/portable</name>
- <type>9</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-GCC</arguments>
- </matcher>
- </filter>
- <filter>
- <id>1689225845134</id>
- <name>Libraries/FreeRTOS-Kernel/portable</name>
- <type>9</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-MemMang</arguments>
- </matcher>
- </filter>
<filter>
<id>1689232848768</id>
<name>FreeRTOS-Plus-TCP/source/portable/BufferManagement</name>
@@ -210,7 +147,7 @@
</matcher>
</filter>
<filter>
- <id>1689232907601</id>
+ <id>1725897057021</id>
<name>FreeRTOS-Plus-TCP/source/portable/NetworkInterface</name>
<type>9</type>
<matcher>
@@ -219,7 +156,7 @@
</matcher>
</filter>
<filter>
- <id>1689232907604</id>
+ <id>1725897057024</id>
<name>FreeRTOS-Plus-TCP/source/portable/NetworkInterface</name>
<type>9</type>
<matcher>
@@ -228,21 +165,12 @@
</matcher>
</filter>
<filter>
- <id>1689229384197</id>
- <name>Libraries/FreeRTOS-Kernel/portable/GCC</name>
+ <id>1725897057027</id>
+ <name>FreeRTOS-Plus-TCP/source/portable/NetworkInterface</name>
<type>9</type>
<matcher>
<id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-ARM_CM4F</arguments>
- </matcher>
- </filter>
- <filter>
- <id>1689229403476</id>
- <name>Libraries/FreeRTOS-Kernel/portable/MemMang</name>
- <type>5</type>
- <matcher>
- <id>org.eclipse.ui.ide.multiFilter</id>
- <arguments>1.0-name-matches-false-false-heap_4.c</arguments>
+ <arguments>1.0-name-matches-false-false-loopback</arguments>
</matcher>
</filter>
</filteredResources>
diff --git a/Libraries/Config/FreeRTOSIPConfig.h b/Libraries/Config/FreeRTOSIPConfig.h
index c53ed14..21b3e26 100644
--- a/Libraries/Config/FreeRTOSIPConfig.h
+++ b/Libraries/Config/FreeRTOSIPConfig.h
@@ -135,7 +135,7 @@ stack will revert to using the static IP address even when ipconfigUSE_DHCP is
set to 1 if a valid configuration cannot be obtained from a DHCP server for any
reason. The static configuration used is that passed into the stack by the
FreeRTOS_IPInit() function call. */
-#define ipconfigUSE_DHCP 1
+#define ipconfigUSE_DHCP 0
#define ipconfigDHCP_REGISTER_HOSTNAME 1
#define ipconfigDHCP_USES_UNICAST 1
@@ -315,7 +315,7 @@ extern void vLoggingPrintf( const char * pcFormat, ... );
1 then FreeRTOS_debug_printf should be defined to the function used to print
out the debugging messages. */
#ifndef ipconfigHAS_DEBUG_PRINTF
- #define ipconfigHAS_DEBUG_PRINTF 0
+ #define ipconfigHAS_DEBUG_PRINTF 1
#endif
#if( ipconfigHAS_DEBUG_PRINTF == 1 )
@@ -376,6 +376,10 @@ messages. */
#define ipconfigTCP_MEM_STATS_MAX_ALLOCATION 64
+#define ipconfigUSE_LOOPBACK 1
+
+#define ipconfigUSE_IPv6 0
+
#ifdef __cplusplus
} /* extern "C" */
#endif
diff --git a/Libraries/FreeRTOS-Plus-CLI/app_main.c b/Libraries/FreeRTOS-Plus-CLI/app_main.c
index d297a79..b965bfc 100644
--- a/Libraries/FreeRTOS-Plus-CLI/app_main.c
+++ b/Libraries/FreeRTOS-Plus-CLI/app_main.c
@@ -30,14 +30,14 @@
/* Set the USE_IPv6_END_POINTS macro to 1 or 0 to enable IPv6
* endpoints.
*/
-#define USE_IPv6_END_POINTS 1
+#define USE_IPv6_END_POINTS 0
#if ( ipconfigUSE_IPv6 != 0 && USE_IPv6_END_POINTS != 0 && ipconfigUSE_IPv4 != 0 )
- #define TOTAL_ENDPOINTS 3
+ #define TOTAL_ENDPOINTS (3 + 1)
#elif ( ipconfigUSE_IPv4 == 0 && ipconfigUSE_IPv6 != 0 )
- #define TOTAL_ENDPOINTS 2
+ #define TOTAL_ENDPOINTS (2 + 1)
#else
- #define TOTAL_ENDPOINTS 1
+ #define TOTAL_ENDPOINTS (1 + 1)
#endif /* ( ipconfigUSE_IPv6 != 0 && USE_IPv6_END_POINTS != 0 ) */
@@ -52,12 +52,12 @@
* configTCP_ECHO_SERVER_ADDR macro
*
* mainCREATE_UDP_ECHO_TASKS_SINGLE: When set to 1 a task is created that sends data
- * to the address configECHO_SERVER_ADDR_STRING (IPv4/Ipv6) and port (configECHO_SERVER_PORT)
+ * to the address configECHO_SERVER_ADDR_STRING (IPv4/Ipv6) and port (configECHO_SERVER_PORT)
* where it is expected to echo back the data, which, the created tasks receives.
*
*/
-#define mainCREATE_TCP_ECHO_TASKS_SINGLE 1 /* 1 */
-#define mainCREATE_UDP_ECHO_TASKS_SINGLE 1
+#define mainCREATE_TCP_ECHO_TASKS_SINGLE 0 /* 1 */
+#define mainCREATE_UDP_ECHO_TASKS_SINGLE 0
/*-----------------------------------------------------------*/
/*-----------------------------------------------------------*/
@@ -92,6 +92,11 @@ void app_main( void )
const uint8_t ucDNSServerAddress[ 4 ] = { configDNS_SERVER_ADDR0, configDNS_SERVER_ADDR1, configDNS_SERVER_ADDR2, configDNS_SERVER_ADDR3 };
const uint8_t ucMACAddress[ 6 ] = { configMAC_ADDR0, configMAC_ADDR1, configMAC_ADDR2, configMAC_ADDR3, configMAC_ADDR4, configMAC_ADDR5 };
+ const uint8_t ucLoopbackIPAddress[ 4 ] = { 127, 0 , 0 , 1 };
+ const uint8_t ucLoopbackNetMask[ 4 ] = { 255, 0, 0, 0 };
+ const uint8_t ucLoopbackGatewayAddress[ 4 ] = { 0, 0, 0, 0 };
+ const uint8_t ucLoopbackDNSServerAddress[ 4 ] = { 0, 0, 0, 0 };
+
xRet = xLoggingTaskInitialize( mainLOGGING_TASK_STACK_SIZE,
mainLOGGING_TASK_PRIORITY,
mainLOGGING_QUEUE_LENGTH );
@@ -100,7 +105,7 @@ void app_main( void )
configPRINTF( ( "Calling FreeRTOS_IPInit...\n" ) );
- static NetworkInterface_t xInterfaces[1];
+ static NetworkInterface_t xInterfaces[2];
static NetworkEndPoint_t xEndPoints[4];
//memcpy(ipLOCAL_MAC_ADDRESS, ucMACAddress, sizeof ucMACAddress);
@@ -126,6 +131,15 @@ void app_main( void )
}
#endif /* ( ipconfigUSE_IPv4 != 0 ) */
+ extern NetworkInterface_t * pxLoopback_FillInterfaceDescriptor(BaseType_t xEMACIndex,
+ NetworkInterface_t * pxInterface );
+
+ pxLoopback_FillInterfaceDescriptor(0, &(xInterfaces[1]));
+
+ FreeRTOS_FillEndPoint(&(xInterfaces[1]), &(xEndPoints[xEndPointCount]), ucLoopbackIPAddress, ucLoopbackNetMask, ucLoopbackGatewayAddress, ucLoopbackDNSServerAddress, ucMACAddress);
+
+ xEndPointCount += 1;
+
/*
* End-point-1 : public
* Network: 2001:470:ed44::/64
@@ -214,10 +228,63 @@ void app_main( void )
/* Infinite loop */
for(;;)
{
-
+
+ }
+}
+
+static void prvLoopbackTestTask( void *pvParameters )
+{
+ struct freertos_sockaddr localAddress;
+ struct freertos_sockaddr connectedAddress;
+ uint32_t lenConn;
+ Socket_t sockListening = NULL;
+ Socket_t sockConnecting = NULL;
+
+
+ localAddress.sin_address.ulIP_IPv4 = FreeRTOS_inet_addr("127.0.0.1");
+ localAddress.sin_port = FreeRTOS_htons(5000);
+
+ sockListening = FreeRTOS_socket(FREERTOS_AF_INET, FREERTOS_SOCK_STREAM, FREERTOS_IPPROTO_TCP);
+ sockConnecting = FreeRTOS_socket(FREERTOS_AF_INET, FREERTOS_SOCK_STREAM, FREERTOS_IPPROTO_TCP);
+ if (sockConnecting != FREERTOS_INVALID_SOCKET && sockConnecting != FREERTOS_INVALID_SOCKET)
+ {
+ int res = FreeRTOS_bind(sockListening, &localAddress, sizeof(&localAddress));
+ if (!res)
+ {
+ res = FreeRTOS_listen(sockListening, 2);
+ if (!res)
+ {
+ res = FreeRTOS_connect(sockConnecting, &localAddress, sizeof(&localAddress));
+ if (!res)
+ {
+ FreeRTOS_accept(sockListening, &connectedAddress, &lenConn);
+ }
+ else
+ {
+ vLoggingPrintf("Failed to connect to local Address \n");
+ }
+ }
+ else
+ {
+ vLoggingPrintf("Failed to listen on local Address \n");
+ }
+ }
+ else
+ {
+ vLoggingPrintf("Failed to bind local Address \n");
+ }
}
}
+static void vStartLoopbackTestTask( uint16_t usTaskStackSize, UBaseType_t uxTaskPriority)
+{
+ xTaskCreate( prvLoopbackTestTask, /* The function that implements the task. */
+ "loopbackConnect", /* Just a text name for the task to aid debugging. */
+ usTaskStackSize, /* The stack size is defined in FreeRTOSIPConfig.h. */
+ NULL, /* The task parameter, not used in this case. */
+ uxTaskPriority, /* The priority assigned to the task is defined in FreeRTOSConfig.h. */
+ NULL );
+}
#if defined(ipconfigIPv4_BACKWARD_COMPATIBLE) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 )
void vApplicationIPNetworkEventHook_Multi( eIPCallbackEvent_t eNetworkEvent, struct xNetworkEndPoint* pxEndPoint )
@@ -243,6 +310,7 @@ void app_main( void )
#if ( ipconfigUSE_IPv4 != 0 )
+ vStartLoopbackTestTask(mainCLI_TASK_STACK_SIZE, mainCLI_TASK_PRIORITY);
#if mainCREATE_TCP_ECHO_TASKS_SINGLE
void vStartTCPEchoClientTasks_SingleTasks( uint16_t usTaskStackSize, UBaseType_t uxTaskPriority );
@@ -267,12 +335,12 @@ void app_main( void )
extern void showEndPoint( NetworkEndPoint_t * pxEndPoint );
showEndPoint( pxEndPoint );
-
+
#else
char cBuffer[ 16 ];
uint32_t ulIPAddress, ulNetMask, ulGatewayAddress, ulDNSServerAddress;
-
+
/* Print out the network configuration, which may have come from a DHCP
* server. */
#if defined(ipconfigIPv4_BACKWARD_COMPATIBLE) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 )
@@ -292,7 +360,7 @@ void app_main( void )
FreeRTOS_inet_ntoa( ulDNSServerAddress, cBuffer );
configPRINTF( ( "DNS Server Address: %s\n", cBuffer ) );
-
+
#endif /* defined(ipconfigIPv4_BACKWARD_COMPATIBLE) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
}
--
2.25.1