Hello,
I hope somebody can help me.
I am using lwip 2.0.2 together with freertos 7.0.4.
My problem:
In my application I immediately have to send many small frames.
When I try to send a single frame it is never send.
Although I am calling tcp_write() and afterwards tcp_output()
the first data frame remains in the sendbuffer untill the second
call of tcp_write() + tcp_output(). Then both frames are sent (See
Wireshark).
I disabled Nagle but without success.
//----------------------------------------------------------------------------------------------------------------------------
struct tcp_pcb *pcb = tcp_active_pcbs;
pcb->flags |= TF_NODELAY;
bool foundflag = false;
while(pcb != NULL)
{ //Only certain combinations of ports and CAN channels are valid
if((pcb->local_port == PortCAN1 && can_tx_msgobj.Channel == CAN0)||
//5459 and CAN0
(pcb->local_port == PortCAN2 && can_tx_msgobj.Channel == CAN1)||
//5460 and CAN1
(pcb->local_port == PortCAN3 && can_tx_msgobj.Channel == CAN2))
//5461 and CAN2
{
foundflag = true;
//Check for sufficant sending buffer
if(tcp_sndbuf(pcb) >= (supersize))
{
write_error = tcp_write(pcb, ucrecBuff, supersize,
TCP_WRITE_FLAG_COPY);
System.led.cBlinkData += 1;
output_error = tcp_output(pcb);
}
else if(tcp_sndbuf(pcb) < (supersize))
{
set_SystemStatus(SYSTEM_WARNING, 17);
System.led.cBlinkError += 2;
}
}
//Pointer to next protocol control block
pcb = pcb->next;
}
//----------------------------------------------------------------------------------------------------------------------------------------------------------------
Wireshark:
9 17.118269000 192.168.10.32 192.168.10.6 TCP
98 5459 > netware-csp [PSH, ACK] Seq=133 Ack=1 Win=5840 Len=44
10 17.118326000 192.168.10.32 192.168.10.6 TCP
98 5459 > netware-csp [PSH, ACK] Seq=177 Ack=1 Win=5840 Len=44
11 17.141011000 192.168.10.6 192.168.10.32 TCP
54 netware-csp > 5459 [ACK] Seq=1 Ack=221 Win=65252 Len=0
12 28.253804000 192.168.10.32 192.168.10.6 TCP
98 5459 > netware-csp [PSH, ACK] Seq=221 Ack=1 Win=5840 Len=44
13 28.253856000 192.168.10.32 192.168.10.6 TCP
98 5459 > netware-csp [PSH, ACK] Seq=265 Ack=1 Win=5840 Len=44
14 28.262310000 192.168.10.6 192.168.10.32 TCP
54 netware-csp > 5459 [ACK] Seq=1 Ack=309 Win=65164 Len=0
The lwip Stack never sends a single frame and I don’t know why.
My lwipopts.h:
/*
* lwipopts.h
*
* Created: 30.03.2017 11:11:16
* Author: motz.werner
*/
#ifndef LWIPOPTS_H_
#define LWIPOPTS_H_
//#include "conf_lwip_threads.h"
#include "lwip/debug.h"
#include "config_tasks.h"
/**
* NO_SYS==1: Provides VERY minimal functionality. Otherwise,
* use lwIP facilities.
* Uses Raw API only.
*/
#define NO_SYS 0
#define LWIP_RAW 0
/* These are not available when using "NO_SYS" */
#define LWIP_NETCONN 0
#define LWIP_SOCKET 0
/* Define default values for unconfigured parameters. */
#define LWIP_NOASSERT 0 /* To suppress some errors for now (no debug output)
*/
#define LWIP_DEBUG 0
/* These two control is reclaimer functions should be compiled
* in. Should always be turned on (1). */
#define MEM_RECLAIM 1
#define MEMP_RECLAIM 1
/* Platform specific locking */
/*
* enable SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task
protection
* for certain critical regions during buffer allocation, deallocation and
memory
* allocation and deallocation.
*/
#define SYS_LIGHTWEIGHT_PROT 1
/* ---------- Memory options ---------- */
/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
* lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
* byte alignment -> define MEM_ALIGNMENT to 2. */
#define MEM_ALIGNMENT 4
/* MEM_SIZE: the size of the heap memory. If the application will send
* a lot of data that needs to be copied, this should be set high. */
#define MEM_SIZE 8 * 1024
/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
* sends a lot of data out of ROM (or other static memory), this
* should be set high. */
#define MEMP_NUM_PBUF 6
/* Number of raw connection PCBs */
#define MEMP_NUM_RAW_PCB 5//1 <----- Hier geändert
/* ---------- UDP options ---------- */
#define LWIP_UDP 1
#define UDP_TTL 255
/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
* per active UDP "connection". */
/* required by DHCP (because DNS is used) */
#define MEMP_NUM_UDP_PCB 1
#if (TFTP_USED == 1)
/* one PCB for DHCP (DNS used), one for TFTP */
#undef MEMP_NUM_UDP_PCB
#define MEMP_NUM_UDP_PCB 2
#endif
/* MEMP_NUM_TCP_PCB: the number of simultaneously active TCP connections. */
#define MEMP_NUM_TCP_PCB 8//2
/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections. */
#define MEMP_NUM_TCP_PCB_LISTEN 8//1
/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments. */
#define MEMP_NUM_TCP_SEG 48 //8
//--------------------
/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active timeouts. */
#define MEMP_NUM_SYS_TIMEOUT 6
/* The following four are used only with the sequential API and can be
* set to 0 if the application only will use the raw API. */
/* MEMP_NUM_NETBUF: the number of struct netbufs. */
#define MEMP_NUM_NETBUF 8//3
/* MEMP_NUM_NETCONN: the number of struct netconns. */
#define MEMP_NUM_NETCONN 8//4
/* ---------- Pbuf options ---------- */
/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
#define PBUF_POOL_SIZE 8
/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
#define PBUF_POOL_BUFSIZE 2048//3000//500
//!!!!!!!!!!!!!!!!!!!!!!!!
/** ETH_PAD_SIZE: number of bytes added before the ethernet header to ensure
* alignment of payload after that header. Since the header is 14 bytes long,
* without this padding e.g. addresses in the IP header will not be aligned
* on a 32-bit boundary, so setting this to 2 can speed up 32-bit-platforms.
*/
#define ETH_PAD_SIZE 0
/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
* link level header. */
#define PBUF_LINK_HLEN (16 + ETH_PAD_SIZE)
/* ---------- TCP options ---------- */
#define LWIP_TCP 1
#define TCP_TTL 255
/* TCP receive window. */
#define TCP_WND 4 * TCP_MSS//3000 <------ Hier geändert
/* Controls if TCP should queue segments that arrive out of
* order. Define to 0 if your device is low on memory. */
#define TCP_QUEUE_OOSEQ 1
/* TCP Maximum segment size. */
#define TCP_MSS 1460
/* TCP sender buffer space (bytes). */
#define TCP_SND_BUF 4 * TCP_MSS//16*TCP_MSS
/* TCP sender buffer space (pbufs). This must be at least = 2 *
TCP_SND_BUF/TCP_MSS for things to work. */
#define TCP_SND_QUEUELEN 8//48//(TCP_SND_BUF/TCP_MSS)*2// ((6 *
(TCP_SND_BUF) + (TCP_MSS - 1))/(TCP_MSS)) <-----Hier geändert war 16
/* Maximum number of retransmissions of data segments. */
#define TCP_MAXRTX 12
/* Maximum number of retransmissions of SYN segments. */
#define TCP_SYNMAXRTX 4
/**
* DEFAULT_RAW_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
* NETCONN_RAW. The queue size value itself is platform-dependent, but is
passed
* to sys_mbox_new() when the recvmbox is created.
*/
#define DEFAULT_RAW_RECVMBOX_SIZE 6
/**
* DEFAULT_UDP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
* NETCONN_UDP. The queue size value itself is platform-dependent, but is
passed
* to sys_mbox_new() when the recvmbox is created.
*/
#define DEFAULT_UDP_RECVMBOX_SIZE 6
/**
* DEFAULT_TCP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
* NETCONN_TCP. The queue size value itself is platform-dependent, but is
passed
* to sys_mbox_new() when the recvmbox is created.
*/
#define DEFAULT_TCP_RECVMBOX_SIZE 6
/**
* DEFAULT_ACCEPTMBOX_SIZE: The mailbox size for the incoming connections.
* The queue size value itself is platform-dependent, but is passed to
* sys_mbox_new() when the acceptmbox is created.
*/
#define DEFAULT_ACCEPTMBOX_SIZE 6
/* ---------- ARP options ---------- */
#define ARP_TABLE_SIZE 10
#define ARP_QUEUEING 0
/* ---------- IP options ---------- */
/* Define IP_FORWARD to 1 if you wish to have the ability to forward
* IP packets across network interfaces. If you are going to run lwIP
* on a device with only one network interface, define this to 0. */
#define IP_FORWARD 0
/* If defined to 1, IP options are allowed (but not parsed). If
* defined to 0, all packets with IP options are dropped. */
#define IP_OPTIONS 1
/* ---------- ICMP options ---------- */
#define ICMP_TTL 255
/* ---------- DHCP options ---------- */
/* Define LWIP_DHCP to 1 if you want DHCP configuration of
* interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
* turning this on does currently not work. */
#define LWIP_DHCP 1
#ifdef LWIP_DHCP
//#define DHCP_USED
#endif
/* 1 if you want to do an ARP check on the offered address
* (recommended). */
/* #define DHCP_DOES_ARP_CHECK 1 */
/*
* ------------------------------------
* ---------- Thread options ----------
* ------------------------------------
*/
/**
* TCPIP_THREAD_NAME: The name assigned to the main tcpip thread.
*/
#define TCPIP_THREAD_NAME "TCP/IP"
/**
* TCPIP_THREAD_STACKSIZE: The stack size used by the main tcpip thread.
* The stack size value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define TCPIP_THREAD_STACKSIZE lwipINTERFACE_STACK_SIZE
/**
* TCPIP_THREAD_PRIO: The priority assigned to the main tcpip thread.
* The priority value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define TCPIP_THREAD_PRIO lwipINTERFACE_TASK_PRIORITY
/**
* TCPIP_MBOX_SIZE: The mailbox size for the tcpip thread messages
* The queue size value itself is platform-dependent, but is passed to
* sys_mbox_new() when tcpip_init is called.
*/
#define TCPIP_MBOX_SIZE 6
/**
* SLIPIF_THREAD_NAME: The name assigned to the slipif_loop thread.
*/
#define SLIPIF_THREAD_NAME "slipif"
/**
* SLIP_THREAD_STACKSIZE: The stack size used by the slipif_loop thread.
* The stack size value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define SLIPIF_THREAD_STACKSIZE configMINIMAL_STACK_SIZE
/**
* SLIPIF_THREAD_PRIO: The priority assigned to the slipif_loop thread.
* The priority value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define SLIPIF_THREAD_PRIO 1
/**
* PPP_THREAD_NAME: The name assigned to the pppMain thread.
*/
#define PPP_THREAD_NAME "pppInputThread"
/**
* PPP_THREAD_STACKSIZE: The stack size used by the pppMain thread.
* The stack size value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define PPP_THREAD_STACKSIZE configMINIMAL_STACK_SIZE
/**
* PPP_THREAD_PRIO: The priority assigned to the pppMain thread.
* The priority value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define PPP_THREAD_PRIO 1
/**
* DEFAULT_THREAD_NAME: The name assigned to any other lwIP thread.
*/
#define DEFAULT_THREAD_NAME "lwIP"
/**
* DEFAULT_THREAD_STACKSIZE: The stack size used by any other lwIP thread.
* The stack size value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define DEFAULT_THREAD_STACKSIZE configMINIMAL_STACK_SIZE
/**
* DEFAULT_THREAD_PRIO: The priority assigned to any other lwIP thread.
* The priority value itself is platform-dependent, but is passed to
* sys_thread_new() when the thread is created.
*/
#define DEFAULT_THREAD_PRIO 1
#define LWIP_NETIF_STATUS_CALLBACK 1
/* ---------- Statistics options ---------- */
#define LWIP_STATS 1
#define LWIP_STATS_DISPLAY 0
#if LWIP_STATS
#define LINK_STATS 0
#define IP_STATS 0
#define ICMP_STATS 0
#define UDP_STATS 0
#define TCP_STATS 0
#define MEM_STATS 0
#define MEMP_STATS 0
#define PBUF_STATS 0
#define SYS_STATS 1
#endif /* STATS */
/* ---------- Lwip Debug options ---------- */
//LWIP_DBG_ON
#define DBG_TYPES_ON 0xff
#define ETHARP_DEBUG LWIP_DBG_OFF
#define NETIF_DEBUG LWIP_DBG_OFF//LWIP_DBG_ON
#define PBUF_DEBUG LWIP_DBG_OFF//LWIP_DBG_ON
#define API_LIB_DEBUG LWIP_DBG_OFF
#define API_MSG_DEBUG LWIP_DBG_OFF//LWIP_DBG_ON
#define SOCKETS_DEBUG LWIP_DBG_OFF
#define ICMP_DEBUG LWIP_DBG_OFF
#define INET_DEBUG LWIP_DBG_OFF
#define IP_DEBUG LWIP_DBG_OFF
#define IP_REASS_DEBUG LWIP_DBG_OFF
#define RAW_DEBUG LWIP_DBG_OFF
#define MEM_DEBUG LWIP_DBG_OFF
#define MEMP_DEBUG LWIP_DBG_OFF
#define SYS_DEBUG LWIP_DBG_OFF
#define TCP_DEBUG LWIP_DBG_OFF//LWIP_DBG_ON
#define TCP_INPUT_DEBUG LWIP_DBG_OFF
#define TCP_FR_DEBUG LWIP_DBG_OFF
#define TCP_RTO_DEBUG LWIP_DBG_OFF
#define TCP_CWND_DEBUG LWIP_DBG_OFF
#define TCP_WND_DEBUG LWIP_DBG_OFF
#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF
#define TCP_RST_DEBUG LWIP_DBG_OFF
#define TCP_QLEN_DEBUG LWIP_DBG_OFF
#define UDP_DEBUG LWIP_DBG_OFF
#define TCPIP_DEBUG LWIP_DBG_OFF
#define DBG_MIN_LEVEL LWIP_DBG_LEVEL_SEVERE
/* \note For a list of all possible lwIP configurations, check
*
http://lwip.wikia.com/wiki/Lwipopts.h */
//*****************************************************************************
//
// ---------- httpd options ----------
//
//*****************************************************************************
#define INCLUDE_HTTPD_SSI
#define INCLUDE_HTTPD_CGI
#define LWIP_HTTPD_DYNAMIC_HEADERS
#endif /* LWIPOPTS_H_ */
I am really looking forward to your answer.
--
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