|
Hi Chen,
I'm working on a similiar project :
basic echo server with FreeRTOS, but me I use the
netconn_* API. Right now it accepts only one connection,
but I must program the server to allow multiple socket simultaneously, like
you need to.
By the way i'm very new into socket
programming.
I did'nt tried anything yet but thought of ways to
acheive that:
- bind every port/address you need, then listen to
them.
- create a task that waits for client to
connect;
- once a client connected, this task should
start/resume the echo server task (which shall be the same code for every
connections)
- Try to share and manage lwIP ressource
between all tasks.
good luck
Francois
----- Original Message -----
Sent: Friday, February 13, 2009 10:50
AM
Subject: Re: [lwip-users] Struggling to
build a TCP echo server
First, thanks to all the helping hands from the
group!
Weighing my options, I decided to use "real" socket programming
instead of TCI_* raw APIs.
Attached is the codes of a working echo
server, running on FreeRTOS.
After getting it to work, I tried to
implement two echo servers on FreeRTOS.
I duplicated the codes to a
different thread, on a different port, and fired it up, none worked. It seems
as long as I have one socket opened, the other will not be able to
work.
Any suggestion?
>>>>>>>>
Working Echo Server
>>>>>>>>>>>>>>>
int lSocket;
struct
sockaddr_in sLocalAddr;
lSocket = socket(AF_INET,
SOCK_STREAM, 0);
memset((char *)&sLocalAddr, 0, sizeof(sLocalAddr));
sLocalAddr.sin_family =
AF_INET;
sLocalAddr.sin_len = sizeof(sLocalAddr);
sLocalAddr.sin_addr.s_addr =
htonl(INADDR_ANY);
sLocalAddr.sin_port = TFTP_PORT;
bind(lSocket, (struct sockaddr *)&sLocalAddr, sizeof(sLocalAddr));
lwip_listen(lSocket, 20);
while (1)
{
int
clientfd;
struct sockaddr_in
client_addr;
int addrlen=sizeof(client_addr);
clientfd = lwip_accept(lSocket, (struct sockaddr*)&client_addr,
(socklen_t)&addrlen);
if
(clientfd>0){
char
buffer[1024];
int
nbytes;
do{
nbytes=lwip_recv(clientfd, buffer, sizeof(buffer),0);
if
(nbytes>0)
lwip_send(clientfd, buffer, nbytes,
0);
}
while
(nbytes>0 && strncmp("bye\r", buffer, 4)
!=0);
close(clientfd);
}
}
Date: Thu, 05 Feb
2009 19:22:05 +0100
From: "address@hidden"
<address@hidden>
Subject: Re: [lwip-users] Struggling to build a
TCP echo server
To: Mailing list for lwIP users
<address@hidden>
Message-ID:
<address@hidden>
Content-Type: text/plain;
charset=ISO-8859-1; format=flowed
Chen wrote:
> Could you show
me how to get to the download section to get the sample
> mentioned
by Simon?
http://savannah.nongnu.org/projects/lwip/ ->
'Downloads' in the upper
navigation row. After unpacking contrib, the
HTTP server is in
apps/httpserver_raw/
Simon
_______________________________________________
lwip-users mailing
list
address@hidden
http://lists.nongnu.org/mailman/listinfo/lwip-users
|