• State Not Answered
  • Locked Locked
  • Replies 3 replies
  • Subscribers 21 subscribers
  • Views 3570 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Multiple-client connections on TCP/IP Server

Andrej Pipan

I'm using TCP/IP stack from RL-ARM Library 2.22a and starting point of my project was a sample from Keil LEDSwitch Server.

What i would like to know is what i need to do to be able to receive more then one connection. As currently that is all that i was able to establish.

Here is a debug info that i got when i tried to connect to my HW with second client:

ETH: *** Processing Ethernet frame ***
ETH:  Dest.MAC: 1E:30:6C:A2:45:5E
ETH:  Src. MAC: 00:02:B3:CE:32:23
ETH:  Frame len: 62 bytes
ETH:  Protocol:  0800
IP : *** Processing IP frame ***
IP :  Dest.IP: 192.168.1.90
IP :  Src. IP: 192.168.1.12
IP :  Frame len: 48 bytes
IP :  Protocol:  06, Id: AC36
IP :  Frame valid, IP version 4 OK
ARP:  Adding Cache Entry: 192.168.1.12
ARP:  Existing Cache Entry 0 refreshed
TCP: *** Processing TCP frame ***
TCP:  Src. Port: 1544
TCP:  Dest.Port: 1001
TCP:  Seq.Nr: 824812682
TCP:  Ack.Nr: 0
TCP:  Flags : SYN
TCP:  Allocated Socket 1, port 1001
TCP:  Socket 1, State LISTEN...
TCP ERR: Application rejected Connection request
TCP: Socket 5, Sending Reset
MEM: Allocating 72 bytes
MEM: Allocated 1 blocks from IRQ
MEM:  Used 148 bytes in 2 blocks
TCP:  Src. Port: 1001
TCP:  Dest.Port: 1544
TCP:  Seq.Nr: 0
TCP:  Ack.Nr: 824812683
TCP:  Flags : RST,ACK
IP : Sending IP frame...
IP :  Dest.IP: 192.168.1.12
IP :  Src. IP: 192.168.1.90
IP :  Frame len: 40 bytes
IP :  Protocol:  06, Id: 0002
ETH: Sending Ethernet frame...
ARP:  MAC address resolved from Cache Entry 0
ETH:  Dest.MAC: 00:02:B3:CE:32:23
ETH:  Src. MAC: 1E:30:6C:A2:45:5E
ETH:  Frame len: 54 bytes
ETH:  Protocol:  0800
MEM: Releasing 72 bytes
MEM:  Used 76 bytes in 1 blocks
MEM: Releasing 76 bytes
MEM:  Used 0 bytes in 0 blocks

I setup 5 TCP Sockets in Net_Config.c

What i tried to create two sockets listening to same port, with same or different callback function. Result was the same.

/* Initialize TCP Socket and start listening */
  socket_tcp = tcp_get_socket (TCP_TYPE_SERVER, 0, 60, tcp_callback);
  if (socket_tcp != 0) {
    tcp_listen (socket_tcp, LISTEN_TCP_PORT_NUM);
  }

/* Initialize TCP Socket and start listening */
  socket_tcp1 = tcp_get_socket (TCP_TYPE_SERVER, 0, 60, tcp_callback);
  if (socket_tcp1 != 0) {
    tcp_listen (socket_tcp1, LISTEN_TCP_PORT_NUM);
  }

I looked at the HTTP sample, where more clients can connect, but i guess all that is done inside the library as all you have access to is Number of HTTP Sessions.

0