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zebra: Encode SRv6 flavors in Netlink messages

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Encode SRv6 flavors information when building a seg6local nexthop.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-03-20 22:32:01 +01:00
parent 2417b4add8
commit d890515194
1 changed files with 50 additions and 0 deletions
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50
zebra/rt_netlink.c
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@ -1547,6 +1547,46 @@ static ssize_t fill_seg6ipt_encap(char *buffer, size_t buflen,
return srhlen + 4; return srhlen + 4;
} }
static bool
_netlink_nexthop_encode_seg6local_flavor(const struct nexthop *nexthop,
struct nlmsghdr *nlmsg, size_t buflen)
{
struct rtattr *nest;
struct seg6local_flavors_info *flv;
assert(nexthop);
if (!nexthop->nh_srv6)
return false;
flv = &nexthop->nh_srv6->seg6local_ctx.flv;
if (flv->flv_ops == ZEBRA_SEG6_LOCAL_FLV_OP_UNSPEC)
return true;
nest = nl_attr_nest(nlmsg, buflen, SEG6_LOCAL_FLAVORS);
if (!nest)
return false;
if (!nl_attr_put32(nlmsg, buflen, SEG6_LOCAL_FLV_OPERATION,
flv->flv_ops))
return false;
if (flv->lcblock_len)
if (!nl_attr_put8(nlmsg, buflen, SEG6_LOCAL_FLV_LCBLOCK_BITS,
flv->lcblock_len))
return false;
if (flv->lcnode_func_len)
if (!nl_attr_put8(nlmsg, buflen, SEG6_LOCAL_FLV_LCNODE_FN_BITS,
flv->lcnode_func_len))
return false;
nl_attr_nest_end(nlmsg, nest);
return true;
}
/* This function takes a nexthop as argument and adds /* This function takes a nexthop as argument and adds
* the appropriate netlink attributes to an existing * the appropriate netlink attributes to an existing
* netlink message. * netlink message.
@ -1678,6 +1718,11 @@ static bool _netlink_route_build_singlepath(const struct prefix *p,
nexthop->nh_srv6->seg6local_action); nexthop->nh_srv6->seg6local_action);
return false; return false;
} }
if (!_netlink_nexthop_encode_seg6local_flavor(
nexthop, nlmsg, req_size))
return false;
nl_attr_nest_end(nlmsg, nest); nl_attr_nest_end(nlmsg, nest);
} }
@ -2917,6 +2962,11 @@ ssize_t netlink_nexthop_msg_encode(uint16_t cmd,
__func__, action); __func__, action);
return 0; return 0;
} }
if (!_netlink_nexthop_encode_seg6local_flavor(
nh, &req->n, buflen))
return false;
nl_attr_nest_end(&req->n, nest); nl_attr_nest_end(&req->n, nest);
} }