33 lines
1.3 KiB
Text
33 lines
1.3 KiB
Text
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This example features a simple application listening for udp packets on port
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0xF0B0 (src F0B1). It must be used in conjonction with a node running
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udp-sender-ipv6 example.
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We use this example to test UDP, and most particularly UDP header compression
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with IPv6 and 6lowpan support. When IPv6 is used over an 802.15.4 link,
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6lowpan acts as teh adaptation layer between IPv6 and MAC. In particular, it
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can compress packet headers. IP header is compressed, as well as UDP header.
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With both HC1 and HC01 header compression schemes, UDP 16-bit ports are
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compressed to 4 bits if they are between F0B0 and F0BF.
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sender behavior:
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The sender is implemented in apps/udp/udp-sender.c and acts the following way:
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it waits 15 seconds (to be sure the node configures a global address, in case
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a router on the link sends router advertisements usable for address
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autoconfiguration) , then sends 5 UDP packets to the receiver address
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entered staticvally in apps/udp/udp-sender.c.
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receiver behavior:
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When receiving a packet, the receiver answers with a simmilar packet.
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To run this example, contiki-conf.h must have at least the following flags
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values:
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#define UIP_CONF_UDP 1
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#define UIP_CONF_IPV6 1
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You must configure addresses in apps/udp/udp-sender.c and apps/udp/udp-receiver.c
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which match your platforms addresses.
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