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70 lines
2.7 KiB
Markdown
70 lines
2.7 KiB
Markdown
This example features a simple webserver running on top of the IPv6 contiki
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stack.
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For this example to run properly the UIP_CONF_TCP compilation flag must be set
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to 1 in the contiki-conf.h file of the platform.
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By default contiki ipv6 nodes are configured with the low-power RPL protocol
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and direct outgoing packets through the RPL parent to a mesh border router.
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Access to the webserver thus requires at least one other node to as the RPL
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root. The Makefile changes the default to no RPL for the minimal-net target.
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Override the RPL choice with
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make TARGET=minimal-net UIP_CONF_RPL=1
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make TARGET=any-other UIP_CONF_RPL=0
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The RPL mesh border router can be configured with this webserver using the
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/examples/ipv6/rpl-border-router/ example.
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If you are using the minimal-net platform without RPL you can access the
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webserver through the link local address by appending the interface descriptor
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shown at launch, e.g.
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wget http://[fe80::296:98ff:fe00:0232%tap0] (linux)
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ping http://[fe80::206:98ff:fe00:0202%nnnn] (Windows)
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The lower 64 bits are derived from the ethernet EUI-48 "mac address" in uip6.c:
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uip_lladdr_t uip_lladdr = {{0x00,0x06,0x98,0x00,0x02,0x32}};
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The ipv6 prefix can be hard-coded in the build or assigned through a
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host router advertisement. If hard-coded just assign the prefix to the
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interface:
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sudo ip -6 address add fdfd::1/64 dev tap0 (linux)
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netsh commands or the interface GUI (Windows)
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On linux you can set up router advertisements as follows:
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ifconfig tap0 inet6 3ffe:0501:ffff:0100:0206:98ff:fe00:0231
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ip -6 address add 3ffe:0501:ffff:0100:0206:98ff:fe00:0231 dev tap0
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- You might need to add a route:
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ip -6 route add fd00:0000:0000:0000:0206:98ff:fe00:0232/64 dev tap0
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- Then configure a global address by sending a router advertisement (RA) with a
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prefix option. You can use radvd for example to generate such a packet.
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Note: You should set the preferred and valid lifetime to reasonable value to
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avoid clock wrap-around. E.g.:
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AdvPreferredLifetime 400;
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AdvValidLifetime 600;
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Assume the prefix in the RA is: 3ffe:0501:ffff:0100:0000:0000:0000:0000/64.
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and that the resulting address created by the contiki stack is:
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3ffe:0501:ffff:0100:0206:98ff:fe00:0232
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- Finally you can use:
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wget http://[3ffe:0501:ffff:0100:0206:98ff:fe00:0232]
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The default webserver and content is in /apps/webserver/...
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Change that using e.g.
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make clean
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make WITH_WEBSERVER=webserver-nano
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make TARGET=redbee-econotag WITH_WEBSERVER=webserver-nano
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make TARGET=avr-raven WITH_WEBSERVER=raven-webserver
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*Beware: Make clean before switching make options!*
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