Mirror/frr
0
0
Fork 1
mirror of https://github.com/FRRouting/frr.git synced 2025-04-30 13:37:17 +02:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity

zebra: add End.B6.Encaps to rt_netlink

Browse source 
Introduce the End.B6.Encaps in the rt_netlink code.

Signed-off-by: Dmytro Shytyi <dmytro.shytyi@6wind.com>
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Dmytro Shytyi 2023-12-29 14:40:48 +01:00 committed by Philippe Guibert
parent a65e5eab3e
commit 426f861268
1 changed files with 63 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

66
zebra/rt_netlink.c
View file

@ -94,6 +94,12 @@ struct gw_family_t {
union g_addr gate;
};
struct buf_req {
struct nlmsghdr n;
struct nhmsg nhm;
char buf[];
};
static const char ipv4_ll_buf[16] = "169.254.0.1";
static struct in_addr ipv4_ll;
@ -2936,6 +2942,54 @@ static bool _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, ui
return true;
}
static ssize_t fill_srh_end_b6_encaps(char *buffer, size_t buflen, struct seg6_seg_stack *segs)
{
struct ipv6_sr_hdr *srh;
size_t srhlen;
int i;
if (!segs || segs->num_segs > SRV6_MAX_SEGS) {
/* Exceeding maximum supported SIDs */
return -1;
}
srhlen = SRH_BASE_HEADER_LENGTH + SRH_SEGMENT_LENGTH * segs->num_segs;
if (buflen < srhlen)
return -1;
memset(buffer, 0, buflen);
srh = (struct ipv6_sr_hdr *)buffer;
srh->hdrlen = (srhlen >> 3) - 1;
srh->type = 4;
srh->segments_left = segs->num_segs - 1;
srh->first_segment = segs->num_segs - 1;
for (i = 0; i < segs->num_segs; i++) {
memcpy(&srh->segments[segs->num_segs - i - 1], &segs->seg[i],
sizeof(struct in6_addr));
}
return srhlen;
}
static int netlink_nexthop_msg_encode_end_b6_encaps(struct buf_req *req, const struct nexthop *nh,
size_t buflen)
{
int srh_len;
char srh_buf[4096];
if (!nl_attr_put32(&req->n, buflen, SEG6_LOCAL_ACTION, SEG6_LOCAL_ACTION_END_B6_ENCAP))
return 0;
srh_len = fill_srh_end_b6_encaps(srh_buf, sizeof(srh_buf), nh->nh_srv6->seg6_segs);
if (srh_len < 0)
return 0;
if (!nl_attr_put(&req->n, buflen, SEG6_LOCAL_SRH, srh_buf, srh_len))
return 0;
return 1;
}
/**
* Next hop packet encoding helper function.
*
@ -3248,6 +3302,12 @@ ssize_t netlink_nexthop_msg_encode(uint16_t cmd,
ctx6->table))
return 0;
break;
case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP:
netlink_nexthop_msg_encode_end_b6_encaps((struct buf_req
*)
req,
nh, buflen);
break;
default:
zlog_err("%s: unsupport seg6local behaviour action=%u",
__func__, action);
@ -3261,9 +3321,9 @@ ssize_t netlink_nexthop_msg_encode(uint16_t cmd,
nl_attr_nest_end(&req->n, nest);
}
if (nh->nh_srv6->seg6_segs &&
nh->nh_srv6->seg6_segs->num_segs &&
!sid_zero(nh->nh_srv6->seg6_segs)) {
if (nh->nh_srv6->seg6_segs && nh->nh_srv6->seg6_segs->num_segs &&
!sid_zero(nh->nh_srv6->seg6_segs) &&
nh->nh_srv6->seg6local_action == ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) {
char tun_buf[4096];
ssize_t tun_len;