When zebra is started, someone may have configured an SRv6 encap source
address different from the default address ( :: ) in the kernel.
On startup, zebra should not assume that the actual SRv6 encap source
address is the default address ( :: ), but should retrieve the actual
source address from the kernel and put it in zebra configuration. In
other words, on startup we expect the actual SRv6 encap source
address and the configured one to be the same.
This commit makes the necessary changes to support the above.
Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>
- Add a new node `SRV6_ENCAP_NODE` to the CLI graph. This node allows
users to configure encapsulation parameters for SRv6, including the
source address of the outer encapsulating IPv6 header.
- Install a new CLI command `source-address` under the
`SRV6_ENCAP_NODE` node. This command is used to configure the source
address of the outer encapsulating IPv6 header.
- Install a new CLI command `no source-address` under the
`SRV6_ENCAP_NODE` node. This command is used to unset the
source address of the outer encapsulating IPv6 header and restore the
default source address.
Examples:
```
router# segment-routing
router(sr)# srv6
router(srv6)# encapsulation
router(srv6-encap)# source-address fc00:0:1::1
```
```
router# segment-routing
router(sr)# srv6
router(srv6)# encapsulation
router(srv6-encap)# no source-address
```
Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
In this commit, we add two helper functions
`zebra_notify_srv6_locator_add` and `zebra_notify_srv6_locator_delete`.
These functions are used to notify locator additions/deletions to
zclients.
Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
Running `srv6_locator` topotest with `--valgrind-memleaks` gives several
memory leak errors. This is due to the way SRv6 locators are deleted:
when an SRv6 locator is deleted, it is removed from the SRv6 locators
list (`srv6->locators`), but the memory allocated for the SRv6 locator
is not freed.
This patch adds a call to the `srv6_locator_free()` function to properly
free the allocated memory when an SRv6 locator is removed.
Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is a part of #5853 works that add new ZAPI to
configure SRv6 locator which manages chunk prefix for
SRv6 SID IPv6 address for each routing protocol daemons.
NEW-ZAPIs:
* ZEBRA_SRV6_LOCATOR_ADD
* ZEBRA_SRV6_LOCATOR_DELETE
* ZEBRA_SRV6_MANAGER_CONNECT
* ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK
* ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK
Zclient can connect to zebra's srv6-manager with
ZEBRA_SRV6_MANAGER_CONNECT api like a label-manager.
Then zclient uses ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK to
allocated dedicated locator chunk for it's routing protocol.
Zebra works for only prefix reservation and distribute
the ownership of the locator chunks for zcliens.
Then, zclient installs SRv6 function with
ZEBRA_ROUTE_ADD api with nh_seg6local_* fields.
This feature is already implemented by another PR(#7680).
Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com>
