Ip

[ArnaudD-FR]

[IP] use IP header instead of array offsets

Description

• less error prone

• decrease code size to flash (save some bytes, see below)

• introduce ethernet_header(), ethernet_payload(), ip_header(), ip_payload().... basic functions to retrieve headers and payloads

• use ntoh and hton instead of manual multibytes adaptations. getBigEndianLong has been replaced by standard function ntohl.

Code size evolution depending on examples

Negative value: save size Positive value: increase size

test	old program size	old data size	new program size	new data size	program size delta	data size delta
backSoon	8074	939	8100	939	26	0
getDHCPandDNS	10358	1246	10326	1246	-32	0
getStaticIP	9676	827	9674	827	-2	0
getViaDNS	10206	820	10168	820	-38	0
multipacket	7740	1279	7730	1279	-10	0
nanether	8034	1093	8020	1093	-14	0
noipClient	14706	1357	14666	1355	-40	-2
notifyMyAndroid	11238	1656	11204	1656	-34	0
ntpClient	9018	865	8984	865	-34	0
persistence	10910	823	10838	823	-72	0
pings	10110	1146	10054	1146	-56	0
rbbb_server	8514	881	8522	881	8	0
SSDP	9244	1153	9220	1153	-24	0
stashTest	7152	539	7152	539	0	0
testDHCP	7818	1099	7808	1101	-10	2
testDHCPOptions	7942	1113	7948	1113	6	0
thingspeak	14776	1380	14744	1380	-32	0
twitter	11122	1386	11086	1386	-36	0
udpClientSendOnly	8452	1156	8426	1156	-26	0
udpListener	8380	964	8376	964	-4	0
webClient	10346	1164	10314	1164	-32	0
xively	14838	1058	14806	1058	-32	0