Initial import of task-09 (basic RPL)#18
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- Adapt main README with titles of tasks - add links to prev/next task in task-07/08
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| # Task 9: RIOT and RPL | ||
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| This task will demonstrate basic routing functionalities in RIOT provided by the RPL (IPv6 Routing Protocol for Low-Power and Lossy Networks) routing protocol and multihop communication. |
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please reference https://tools.ietf.org/html/rfc6550 when talking about RPL
PeterKietzmann
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@cgundogan please check out the latest commits! |
| * Each group should change to an individual RF channel. It can be changed by e.g. | ||
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| ``` | ||
| ifconfig 7 set chan 11 |
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Please be more generic (use <if_id> instead of 7). 7 could change in the future
| ## Task 9.1: Initialize RPL | ||
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| * In order to use RPL we have to choose **one** RPL root node and configure a global IPv6 address for it. This is simply done by adding the address to the network interface (`7`) via `ifconfig`: | ||
| (Please note that the network interface is `6` when running on native) |
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use a more generic <if_id>. here and all following
| ## Prerequisites | ||
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| * Compile the application and run on your `BOARD` | ||
| * Build groups of at least three persons |
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maybe be more generic? instead of "group of persons" just "gather 3 boards"?
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| * On not-root nodes, look at the output of `ifconfig` again. You should see that a global unicast IPv6 address has been set automatically. | ||
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| * Typing `rpl` gives you some information about the nodes position in the DODAG. Check the local IPv6 address of the selected parent node. Look for value `R:` which describes the "rank" or more general, the hop count metric. What is the increment for one hop? |
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Look for value R: which describes the "rank" or more general, the hop count metric. the position in the DODAG according to the metric.
| msg_receive(&msg); | ||
| gnrc_pktsnip_t *pkt = msg.content.ptr; | ||
| if(msg.type == GNRC_NETAPI_MSG_TYPE_SND) { | ||
| ipv6_hdr_t *ipv6_hdr = pkt->next->data; |
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using LL_SEARCH to search for the ipv6 packet may be more appropriate, in case there is something in between?
| char addr_str[IPV6_ADDR_MAX_STR_LEN]; | ||
| char addr_str2[IPV6_ADDR_MAX_STR_LEN]; | ||
| printf("IPv6 ROUTER: forward from src = %s, to dst = %s\n", | ||
| ipv6_addr_to_str(addr_str, &(ipv6_hdr->src), sizeof(addr_str)), |
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btw: you can use the same addr_str buffer for ipv6_addr_to_str if you split this into two printf calls
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| From f806bf796c60ded00c0abb4521c9bc3955efd63f Mon Sep 17 00:00:00 2001 | |||
| * Next we need to initialize RPL on the network interface (`<if_id>`) for **all** nodes: | ||
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| ``` | ||
| rpl init <if_id> |
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you don't need this when including in your makefile: USEMODULE += auto_init_gnrc_rpl
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ACK & GO |
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