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| From: | Bellphin Billu |
| Subject: | Re: [lwip-users] lwip-users Digest, Vol 121, Issue 27 |
| Date: | Sat, 5 Oct 2013 17:12:14 +0530 |
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Today's Topics:
1. Re: lwip bind fail (Daniel Doron)
----------------------------------------------------------------------
Message: 1
Date: Mon, 30 Sep 2013 08:08:11 +0000
From: Daniel Doron <address@hidden>
To: "address@hidden" <address@hidden>
Subject: Re: [lwip-users] lwip bind fail
Message-ID: <address@hidden>
Content-Type: text/plain; charset="iso-8859-1"
Hi Jin,
Sorry, I have no experience with any RTOS. I am building my app the old fashioned way (super loop).
I hope the other listeners can help...
BR,
Daniel Doron
Embedded Linux Software Engineer
IdentyTech Solutions ltd.
<http://www.identytech.com>Efal 35
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On 09/24/2013 10:08 PM, Jin Won Seo wrote:
Hi Daniel,
I tested the listener modules with different setting as you mentioned, and nothing worked.
Finally I found the problem in different configuration file which is sys_arch.c. Of course I changed the configuration in lwipopts.h, but some of them in lwipopts.h seem like not affecting that much.
My problem was netconn was not properly allocated. I am not sure still how nicely debug programs based on lwip+safeRTOS, but they seem like not giving me that much options, so I tried to print out a certain message on LCD for debugging.
What I did in sys_arch.c is change SYS_SEM_MAX, SYS_MBOX_MAX. There are simple 5 tasks running together with listener task in my test project, and I guess each task uses their own SEM and MBOX as they get into active.
I just changes the MAX # in sys_arch.c to above # of tasks running on safeRTOS.
In addition, I changed DEFAULT_UDP_RECVMBOX_SIZE as well since I used DHCP option in lwipopts.h to get IP from server in my test project.
However, based on my analysis, even though LWIP_TCP is set, it seems like not affecting because a couple of definitions are redefined in opt.h in case of commenting out definitions in lwipopts.h.
Moreover, netconn_alloc() in api_msg.c(lwip1.3.2) seems like not allowing to use two different protocols like using UDP and TCP together. Only one type of protocol among other that filtered by switch~case for the first time is returned by netconn_alloc() since detecting UDP is prior to TCP in codes.
My project may need both protocols(UDP+TCP), and I wonder how both are used in different scenario??.
I am not sure yet, but it won't allow to use mixed protocols based on the behavior of the function.
I appreciate your help,
Jin
On Tue, Sep 24, 2013 at 4:49 AM, Darius Babrauskas <address@hidden<mailto:address@hidden>> wrote:
It looks, that not defined UDP bufs.
In your lwipopts.h commented out:
//#define LWIP_UDP 1
#define LWIP_UDP 1
//#define MEMP_NUM_UDP_PCB 4
#define MEMP_NUM_UDP_PCB 5
Need uncomment ---------- ARP options ----------
You not using tcp, so comment
#define LWIP_TCP 0
#define MEMP_NUM_TCP_PCB 0// default is 5
Read opt.h for more information...
----- Original Message -----
From: Jin Won Seo<mailto:address@hidden>
To: Mailing list for lwIP users<mailto:address@hidden>
Sent: Friday, September 20, 2013 8:07 PM
Subject: Re: [lwip-users] lwip bind fail
Thanks,
It's my misunderstanding. Telnet doesn't let me check if UDP Server's IP port is alive.
Anyhow, I can't still figure the main problem out.
Why is lwip_socket() not working?
socket_fd = lwip_socket(AF_INET, SOCK_DGRAM, 0) always return -1.
I put a debugging codes to see get a connection in lwip_socket() in sockets.c
if (!conn) {
DisplayString(115, 180 - 10, " ENOBUFS (could not create netconn) ");
LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n"));
set_errno(ENOBUFS);
return -1;
}
and display "ENOBUFS...." on LCD.
lwip_socket_init() is called in different task, which is lwip_task, and listener task sets up socket and receives packets.
lwip_task init lwip and calls lwip_socket_init()
// Initialize lwIP.
//
//get client IP and use it to set up socket later on
lwIPInit(pucMAC, 0, 0, 0, IPADDR_USE_DHCP);
//
// Setup the remaining services inside the TCP/IP thread's context.
//
tcpip_callback(SetupServices, 0);// lwip_socket_init() is called in SetupServices().
I was suspicious about lwipopts.h, so kept changing definition and tested to see if I missed one of definition in the header file. However, it still doesn't work.
I attached my lwipopts.h.
Thanks,
Jin
On Thu, Sep 19, 2013 at 10:53 PM, Darius Babrauskas <address@hidden<mailto:address@hidden>> wrote:
>>Also I directly attempts to access the listener using telnet command(telnet 192.2.0.208 5701), but the below error message comes out
Telnet using TCP protocol. Your server type are UDP. Connection not possible.
----- Original Message -----
From: Jin Won Seo<mailto:address@hidden>
To: Mailing list for lwIP users<mailto:address@hidden>
Sent: Friday, September 20, 2013 12:41 AM
Subject: Re: [lwip-users] lwip bind fail
Hi,
I put a debugging code to see what error no spits out.
if (!conn) {
DisplayString(115, 180 - 10, " ENOBUFS (could not create netconn) ");
LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n"));
set_errno(ENOBUFS);
return -1;
}
" ENOBUFS (could not create netconn) " was displayed on LCD. The meaning of ENOBUFS is /* No buffer space available */
I think it just says that no connection is made up.
I don't know what makes this happened, but I feel like something to do with configuration to use lwip-socket since not even lwip-socket conn is assigned.
Anyone knows about this?
On Thu, Sep 19, 2013 at 11:42 AM, Jens Nielsen <address@hidden<mailto:address@hidden>> wrote:
Hi
Did you check the value of socket_fd? lwip_socket() returns -1 on error but your code tests for == 0
Also check the value of errno after your call, that might give you a hint
BR /Jens
On 2013-09-19 20:19, Jin Won Seo wrote:
Hi all,
I posted my issue but I fell like not describing the problem in detail. So I re-post it with detail information.
I am testing listener modules using LM3S9B96, lwip1.3.2, safeRTOS, StellarisWare 10636, ccs 5.4.x.
The listener task running on safeRTOS basically receives message from server daemon in Unix using socket(UDP).
As the server daemon sends messages, the listener seems like not getting anything from the server
Also I directly attempts to access the listener using telnet command(telnet 192.2.0.208 5701), but the below error message comes out
"telnet : Unable to connect to remote host: Connection refused"
My test scenario is :
1. Get an IP from Server(Unix) using DHCP
//
// Initialize lwIP.
//
lwIPInit(pucMAC, 0, 0, 0, IPADDR_USE_DHCP);
//
// Setup the remaining services inside the TCP/IP thread's context.
//
tcpip_callback(SetupServices, 0);
2. Init lwip socket in SetupServices().
lwip_socket_init();
3. Create listener task to receive packets from server daemon(UDP).
int socket_fd;
struct sockaddr_in sa, ra;//sa = sender addr, ra= receiver addr
NET_MSG *sMsg;
int length;
u32_t size;
size = sizeof(sa);
// addr_setup();
// portTickType xTime1, xTime2;
// Setup the local address.
memset((char *) &ra, 0, sizeof(ra));
ra.sin_family = AF_INET;
ra.sin_len = sizeof(ra);
// ra.sin_addr.s_addr = lwIPLocalIPAddrGet();
ra.sin_addr.s_addr = inet_addr("192.2.0.208");
ra.sin_port = htons(S_PORT);//#define S_PORT 5701
//setup the destination address
memset((char *) &sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_len = sizeof(sa);
sa.sin_addr.s_addr = inet_addr("192.2.0.3");// for test, hard-corded
// sDestAddr.sin_addr.s_addr = chgd_in_addr();
sa.sin_port = htons(S_PORT);
while((socket_fd = lwip_socket(AF_INET, SOCK_DGRAM, 0)) == 0)
{
DisplayString(115, 210 - 10, " lwip socket error... ");
//xTaskDelay(CHGD_OPEN_TIME);
xTaskDelay(SECONDS(5));//arbitrary time for test
}
//bind socket to the local address and port
if(lwip_bind(socket_fd, (struct sockaddr *) &ra, sizeof(ra)) == -1)
{
lwip_close(socket_fd);
DisplayString(115, 190 - 10, " bind error... ");//Display message on LCD in LM3S9B96
}
while(1)
{
//receive from server
length = lwip_recvfrom(socket_fd, (char *) msg_buf, sizeof(msg_buf),
MSG_DONTWAIT, (struct sockaddr *)&sa, &size);
if(length > 0)
{
sMsg = (NET_MSG *) (msg_buf);
mon_cmd_do(socket_fd, &sa, sMsg, length);
}
lwip_close(socket_fd);
xTaskDelay(1);// 1ms tick delay
}
As the program is executed, it seems like not binding socket properly since "bind error..." is displayed on LCD.
Here is my lwipopts.h
#define SYS_LIGHTWEIGHT_PROT 1 // default is 0
#define NO_SYS 0 // default is 0
#if !NO_SYS
#define RTOS_SAFERTOS 1
#define RTOS_FREERTOS 0
#endif /* !NO_SYS */
#define MEMP_NUM_PBUF 64
#define MEMP_NUM_TCP_PCB 40
#define MEMP_NUM_TCP_SEG 48
#define MEMP_NUM_SYS_TIMEOUT 10
#define PBUF_POOL_SIZE 64
#define IP_REASSEMBLY 0 // default is 1
#define IP_FRAG 0 // default is 1
#define LWIP_DHCP 1
#define LWIP_AUTOIP 1 // default is 0
#define LWIP_DHCP_AUTOIP_COOP ((LWIP_DHCP) && (LWIP_AUTOIP))
// default is 0
#define LWIP_DHCP_AUTOIP_COOP_TRIES 5 // default is 9
#define TCP_WND 4096 // default is 2048
#define TCP_MSS 1500 // default is 128
//#define TCP_CALCULATE_EFF_SEND_MSS 1
#define TCP_SND_BUF (6 * TCP_MSS)
// default is 256
#define TCP_SND_QUEUELEN (MEMP_NUM_TCP_SEG)
#define PBUF_LINK_HLEN 16 // default is 14
#define PBUF_POOL_BUFSIZE 256
// default is LWIP_MEM_ALIGN_SIZE(TCP_MSS+40+PBUF_LINK_HLEN)
#define ETH_PAD_SIZE 2 // default is 0
#define TCPIP_THREAD_NAME "tcpip_thread"
#define TCPIP_THREAD_STACKSIZE 1024
#define TCPIP_THREAD_PRIO 3
#define TCPIP_MBOX_SIZE 32
#define LWIP_NETCONN 1 // default is 1
//*****************************************************************************
//
// ---------- Socket Options ----------
//
//*****************************************************************************
#define LWIP_SOCKET 1 // default is 1
#define LWIP_COMPAT_SOCKETS 0
#define LWIP_POSIX_SOCKETS_IO_NAMES 0
#define LWIP_TCP_KEEPALIVE 0
#define LWIP_SO_RCVTIMEO 0
#define LWIP_SO_RCVBUF 0
#define SO_REUSE 0
#define LWIP_PROVIDE_ERRNO 1 //Add for lwip socket errors
#define LWIP_STATS_LARGE 1
#define LWIP_DBG_MIN_LEVEL LWIP_DBG_LEVEL_OFF
#define LWIP_DBG_TYPES_ON (LWIP_DBG_ON|LWIP_DBG_TRACE|LWIP_DBG_STATE|LWIP_DBG_FRESH)
So far I don't see any clues to figure this out.
If anyone can help me out, I will appreciate that.
Thank,
Jin
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