[ECOS] ecos: tcp/ip stack implementation error

[张 亮]

Hi,
   i am willing to show a implementation error in ecos tcp/ip stack:
   as for tcp urgent pointer,when urp >65496(not 65535),urp should be 
65535.because 65536-20(iphdr)-20(tcphdr)=65496.
 following is ecos code:
            u_int32_t urp = tp->snd_up - tp->snd_nxt;
		if (urp > IP_MAXPACKET)//65535 
			urp = IP_MAXPACKET;

it should like this:
                  if(urp > IP_MAXPACKET-sizeof(struct tcpip))
                           urp = IP_MAXPACKET;



BRS/johnsonest




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