From: Zongkai LI <[email protected]>
This serial patches try to support Stateless Address Autoconfiguration(SLAAC)
for IPv6, via Router Solicitation (RS) message responder, which will reply
Router Advertisement (RA) message.
User case:
After this serial patches, a user can follow the following steps to let all
VMs/VIFs on a logical switch has IPv6 prefix/CIDR, configure their IPv6
addresses automatically:
- add MTU "mtu=VAL" into Logical_Switch.other_config column,
- add lsp and lrp for Logical_Switch to make it attached onto a router, the
lsp and lrp should have IPv6 prefix/CIDR in their addresses and networks
columns,
Then, next time VM/VIF sends Router Solicitation (RS) message, a RA packet
will be replied by ovn-controller. When VM/VIF receives that RA packet, it
can configure its IPv6 address(es) and route(s) via that RA packet.
There will be logical flows in table ls_in_ra_rsp(28) to work as RA
responder, with:
- match: ip6.dst == ff02::2 && nd_rs
(nd_rs: icmp6.type == 133 && icmp6.code == 0 && ttl == 255)
- action: nd_ra{put_nd_ra(64,0,10800,0,0);
put_nd_ra_opt_sll(12:34:56:78:9a:bc);
put_nd_ra_opt_mtu(1450);
put_nd_ra_opt_prefix(64,192,10800,10800,fdad:a0f9:a012::);
eth.src = 12:34:56:78:9a:bc;
ip6.src = fe80::f334:56ff:fe78:9abc;
outport = inport; flags.loopback = 1; output;};
(nd_ra is a new action which stands for RS responder;
put_nd_ra is a new specific inner action for nd_ra to set cur_hop_limit,
"Managed address configuration" and "Other configuration" flags, router
lifetime, reachable time and retrans timer in RA packet;
put_nd_ra_opt_sll is a new specific inner action for nd_ra to append Source
Link-layer Address Option for RA message with given ethernet address,
such as 12:34:56:78:9a:bc;
put_nd_ra_opt_mtu is a new specific inner action for nd_ra to append MTU
Option for RA message with given integer value, such as 1450;
put_nd_ra_opt_prefix is a new specific inner action for nd_ra to append
Prefix Information Option for RA message with inner parameters. The inner
parameters will set prefix length, on-link flag and autonomous
address-configuration flag, valid lifetime, preferred lifetime, prefix
in Prefix Information Option.
After a RA packet is composed, the left nested actions will make RA packet
transmitted back to the inport, where Router Solicitation (RS) packet comes.
Zongkai LI(6):
ovs.packets: add compose_nd_ra and packet_put_ra_*_opt support
ovn.lib: update logical-fields for ND
ovs.lib.flow: extend is_nd for all ND messages types
ovn-controller: add 'nd_ra' action against 'nd_na' action
ovn-controller: add 'put_nd_ra' and 'put_nd_opt_*' actions support
ovn-northd: add flow support for SLAAC
include/ovn/actions.h | 86 ++++++++++++++-
lib/flow.c | 26 ++---
lib/flow.h | 5 +-
lib/nx-match.c | 4 +-
lib/odp-execute.c | 20 ++--
lib/odp-util.c | 6 +-
lib/packets.c | 168 ++++++++++++++++++++++++-----
lib/packets.h | 80 +++++++++++---
ovn/controller/pinctrl.c | 217 +++++++++++++++++++++++++++++++++----
ovn/lib/actions.c | 269 +++++++++++++++++++++++++++++++++++++++++++++-
ovn/lib/logical-fields.c | 21 +++-
ovn/northd/ovn-northd.c | 97 +++++++++++++++--
ovn/ovn-nb.ovsschema | 5 +-
ovn/ovn-nb.xml | 11 ++
ovn/ovn-sb.xml | 85 ++++++++++++++-
ovn/utilities/ovn-trace.c | 23 ++--
tests/ovn.at | 134 ++++++++++++++++++++++-
17 files changed, 1149 insertions(+), 108 deletions(-)
--
1.9.1
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