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| author | Ehsan Mohandesi <emohandesi@linux.microsoft.com> | 2023-04-21 17:08:21 -0700 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-05-05 17:58:52 -0400 |
| commit | 6de98b60ba89fb96a3adada11a5b5406f3b3786b (patch) | |
| tree | 37713f86715e19599874069861547f09037528b0 /net/net6.c | |
| parent | 09005c2fb288decb4010f062fdc87d0b82e57584 (diff) | |
| download | u-boot-6de98b60ba89fb96a3adada11a5b5406f3b3786b.tar.gz | |
net: ipv6: Add support for default gateway discovery.
In IPv6, the default gateway and prefix length are determined by receiving
a router advertisement as defined in -
https://www.rfc-editor.org/rfc/rfc4861.
Add support for sending router solicitation (RS) and processing router
advertisements (RA).
If the RA has prefix info option and following conditions are met, then
gatewayip6 and net_prefix_length of ip6addr env variables are initialized.
These are later consumed by IPv6 code for non-local destination IP.
- "Router Lifetime" != 0
- Prefix is NOT link-local prefix (0xfe80::/10)
- L flag is 1
- "Valid Lifetime" != 0
Timing Parameters:
- MAX_RTR_SOLICITATION_DELAY (0-1s)
- RTR_SOLICITATION_INTERVAL (4s) (min retransmit delay)
- MAX_RTR_SOLICITATIONS (3 RS transmissions)
The functionality is enabled by CONFIG_IPV6_ROUTER_DISCOVERY and invoked
automatically from net_init_loop().
Signed-off-by: Ehsan Mohandesi <emohandesi@linux.microsoft.com>
Tested-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>Reviewed-by:
Tested-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
Reviewed-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
Tested-by: Sergei Antonov <saproj@gmail.com>
Reviewed-by: Sergei Antonov <saproj@gmail.com>
Diffstat (limited to 'net/net6.c')
| -rw-r--r-- | net/net6.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/net6.c b/net/net6.c index 75577bcea17..2dd64c0e161 100644 --- a/net/net6.c +++ b/net/net6.c @@ -413,6 +413,7 @@ int net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len) break; case IPV6_NDISC_NEIGHBOUR_SOLICITATION: case IPV6_NDISC_NEIGHBOUR_ADVERTISEMENT: + case IPV6_NDISC_ROUTER_ADVERTISEMENT: ndisc_receive(et, ip6, len); break; default: |