Re: [lwip-users] PPP

[ramash]

Thanks for your reply,we are able to send udp packets but unable to get the
value for sockets and how to pass the socket value inside the udp_send to
function. 

1. how to use socket to get a valid return value,since the return value is
zero for opening socket.kindly suggest a option to get a valid return value
for socket with out using eternet (using only serial port)

regards 
ramash



Frédéric BERNON-2 wrote:
> 
>> Dear All,
>>    Our project team is trying to send data using point to point 
>> protocol,We
>> are using PPP 2.4 version with LWIP.We are able to establish a PPP link 
>> and
>> got IP address from ISP using our own drivers.After this we have the
>> following issues.
> 
> To be sure to understand, do you use the ppp stack provided with lwIP 
> sources, or your own one? What lwIP release do you use?
> 
>> 1.We are unable to pass the  IP packets ,since there are more files such 
>> as
>> tcp.c,ip.c,tcpip.c,udp.c..etc.Through which file we have to send data
>> that
>> is IP packets.
> 
> I will suppose you have implement your own PPP. So, if you use sockets
> API, 
> you should send them to the tcpip_input function (sockets API and netconn 
> API use the same entry point)
> 
>> 2.We decided to use sockets to send packets,but it does not returns a 
>> socket
>> id like  windows socket API.
> 
> lwip_socket/socket return an "int", this one is valid is it's >=0. Windows 
> socket API return a SOCKET type, which is also an "int"
> 
>> 3.we are confused to decide a code flow   to send tcp/ip packets. also in 
>> a
>> file called ip.c the function  ip_init is empty but defined, a comment is
>> mentioned inside the function   "/* no initializations as of yet */".
>>
>> kindly reply us to find a correct path.
> 
> The CVS head is now more simple for init. The best if you know Windows is
> to 
> look the lwip/contrib/ports/msvc6 port which is updated for initialization 
> parts.
> Once initialized, you can use sockets API like on any systems.
> 
> You can also found some informations on :
> 
> http://lwip.scribblewiki.com/LwIP_Main_Page
> 
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