[lwip-users] Timers & lwip tasks (a multithread question with LwIP)

[Frédéric BERNON]

Lwip needs some "timers" for ARP (etharp_tmr), DHCP (dhcp_fine_tmr & 
dhcp_coarse_tmr), SNMP (snmp_timer), etc...

My question is mainly about arp timer, because the table handled in etharp.c is 
in read/write access. In several ports, I see that arp_timer is initialized by 
the main() task during the netif_add(...) call (with the "init" function). But 
when we use the tcpip_init, which create its own task, isn't it possible that 
the arp list was "corrupt" due to a multithreaded access?

And if it's right, isn't it a better place to initialize these timers directly 
in tcpip_thread(...), like the ip_timer for IP_REASSEMBLY, to be sure that only 
one task will use lwip core in the same time?
 
  
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Frédéric BERNON 
HYMATOM SA 
Chef de projet informatique 
Microsoft Certified Professional 
Tél. : +33 (0)4-67-87-61-10 
Fax. : +33 (0)4-67-70-85-44 
Email : address@hidden 
Web Site : http://www.hymatom.fr 
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