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zebra: derive rule family from src->dst->ipv4

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Derive the rule family from src if available, otherwise
dst if available, otherwise assume ipv4. We only support
ipv4/ipv6 currently so it we cant tell from the src/dst
it must be ipv4 and likely a dsfield match.

Signed-off-by: Stephen Worley <sworley@nvidia.com>
This commit is contained in:
Stephen Worley 2020-12-17 16:16:26 -05:00
parent 67765a232d
commit e36ea40d3b
1 changed files with 9 additions and 1 deletions
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10
zebra/rule_netlink.c
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@ -79,7 +79,15 @@ netlink_rule_msg_encode(int cmd, const struct zebra_dplane_ctx *ctx,
if (buflen < sizeof(*req))
return 0;
memset(req, 0, sizeof(*req));
family = PREFIX_FAMILY(src_ip);
/* Assume ipv4 if no src/dst set, we only support ipv4/ipv6 */
if (PREFIX_FAMILY(src_ip))
family = PREFIX_FAMILY(src_ip);
else if (PREFIX_FAMILY(dst_ip))
family = PREFIX_FAMILY(dst_ip);
else
family = AF_INET;
bytelen = (family == AF_INET ? 4 : 16);
req->n.nlmsg_type = cmd;