Hi, all:
I created client program (DHCP client) using UDP:
1. Create socket/connection:
Conn = netconn_new(NETCONN_UDP)
2. connect to remote:
Netconn_connect(conn, IP_ADDR_BROADCAST, DHCP_SERVER_PORT);
3. Bind to local port
Netconn_bind(conn, IP_ADDR_ANY, DHCP_CLIENT_PORT)
4. Prepare message for sending DHCP request (DHCP discover)
5. I am able to send out the correct message (DHCPDISCOVER) for DHCP
Server.
6. From network, I am able to monitor the packets (Ethereal)
So the DHCP client send out (DHCPDISCOVE) for DHCP server,
And DHCP server responses this request and send a DHCPOFFER for
client.
7. I used:
Netconn_recv(conn) to receive the DHCPOFFER packet;
However, it seems to me that netconn_recv(conn) was blocked and
seem
That client doesn't receive such packet!
8. My questions:
Q1. I am sure DHCP server sent out DHCPOFFER packets
(broadcasting);
HOW can client to receive such broadcast packet?
Should I rebind the socket/connect again
(Netconn_bind(conn, IP_ADDR_ANY, DHCP_CLIENT_PORT);)
Q2. The netconn_recv(conn) seems been blocked!
Are there any ways to have timeout mechanism to unblock the
process
After certain time?
Thanks for your help.
Regards,
Chien-Lung
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