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RE: [lwip-users] Raw TCP/IP interface - tcpip_init

From: Bertrik Sikken
Subject: RE: [lwip-users] Raw TCP/IP interface - tcpip_init
Date: Wed, 12 Oct 2005 14:45:14 +0200

Regarding 1) and 2): As far as I know, tcpip.c and the functions in it are not part of the raw API
I don't know if it is easy to run PPP over the raw API.
Regarding 3): I think you can simply call tcp_tmr periodically which will handle the calls to
tcp_fasttmr and tcp_slowtmr for you.
Kind regards,
Bertrik Sikken
System Designer 
Technolution B.V.  
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From: address@hidden [mailto:address@hidden On Behalf Of Prateek Jain
Sent: woensdag 12 oktober 2005 10:36
To: address@hidden
Cc: address@hidden
Subject: [lwip-users] Raw TCP/IP interface - tcpip_init

Iam trying to write ftp client on the top of stack. I have to send the data via dial up connection thus has to run PPP too. I have few queries here.
1. According to the doc "rawapi.txt" -  "The TCP/IP code and the application program both run in the same thread". But when I call tcpip_init() a new thread (tcpip_thread) is created. So basically we have two different threads. Does it mean that Iam not supposed to call tcpip_init() if Iam using raw TCP/IP interface? If I don't call this function PPP is not going to work.
2. In case if I call tcpip_init(), Should I call tcp_slowtmr and tcp_fastmr  functions (as "rawapi.txt" suggests). In case yes, Should they be in application's context or tcpip_thread context? The problems is : If it in in application's context, these function will access the global structures (active pcbs etc) which may be accessed by TCP/IP stack (say when an input packet comes).
3. Is it neccassary to call tcp_slowtmr and tcp_fastmr  functions?
If some has done this type of implmentation, please send the code.
Iam new to this implementation. Any help will be deeeply appreciated. Thanks in Advance....

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