zebra: Add ability to encode/decode netlink FRA_IP_PROTO for rule changes

Encode/Decode the FRA_IP_PROTO but do nothing with it at the moment.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

1 files changed, 20 insertions, 12 deletions

diff --git a/zebra/rule_netlink.c b/zebra/rule_netlink.c
index 08a675ef3a..5cc127de94 100644
--- a/zebra/rule_netlink.c
+++ b/zebra/rule_netlink.c
@@ -58,12 +58,11 @@
  * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer
  * or the number of bytes written to buf.
  */
-static ssize_t
-netlink_rule_msg_encode(int cmd, const struct zebra_dplane_ctx *ctx,
-			uint32_t filter_bm, uint32_t priority, uint32_t table,
-			const struct prefix *src_ip,
-			const struct prefix *dst_ip, uint32_t fwmark,
-			uint8_t dsfield, void *buf, size_t buflen)
+static ssize_t netlink_rule_msg_encode(
+	int cmd, const struct zebra_dplane_ctx *ctx, uint32_t filter_bm,
+	uint32_t priority, uint32_t table, const struct prefix *src_ip,
+	const struct prefix *dst_ip, uint32_t fwmark, uint8_t dsfield,
+	uint8_t ip_protocol, void *buf, size_t buflen)
 {
 	uint8_t protocol = RTPROT_ZEBRA;
 	int family;
@@ -136,6 +135,10 @@ netlink_rule_msg_encode(int cmd, const struct zebra_dplane_ctx *ctx,
 	if (filter_bm & PBR_FILTER_DSFIELD)
 		req->frh.tos = dsfield;
 
+	/* protocol to match on */
+	if (filter_bm & PBR_FILTER_IP_PROTOCOL)
+		nl_attr_put8(&req->n, buflen, FRA_IP_PROTO, ip_protocol);
+
 	/* Route table to use to forward, if filter criteria matches. */
 	if (table < 256)
 		req->frh.table = table;
@@ -168,7 +171,7 @@ static ssize_t netlink_rule_msg_encoder(struct zebra_dplane_ctx *ctx, void *buf,
 		dplane_ctx_rule_get_table(ctx), dplane_ctx_rule_get_src_ip(ctx),
 		dplane_ctx_rule_get_dst_ip(ctx),
 		dplane_ctx_rule_get_fwmark(ctx),
-		dplane_ctx_rule_get_dsfield(ctx), buf, buflen);
+		dplane_ctx_rule_get_dsfield(ctx), 0, buf, buflen);
 }
 
 static ssize_t netlink_oldrule_msg_encoder(struct zebra_dplane_ctx *ctx,
@@ -181,7 +184,7 @@ static ssize_t netlink_oldrule_msg_encoder(struct zebra_dplane_ctx *ctx,
 		dplane_ctx_rule_get_old_src_ip(ctx),
 		dplane_ctx_rule_get_old_dst_ip(ctx),
 		dplane_ctx_rule_get_old_fwmark(ctx),
-		dplane_ctx_rule_get_old_dsfield(ctx), buf, buflen);
+		dplane_ctx_rule_get_old_dsfield(ctx), 0, buf, buflen);
 }
 
 /* Public functions */
@@ -236,6 +239,7 @@ int netlink_rule_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
 	char *ifname;
 	struct zebra_pbr_rule rule = {};
 	uint8_t proto = 0;
+	uint8_t ip_proto = 0;
 
 	/* Basic validation followed by extracting attributes. */
 	if (h->nlmsg_type != RTM_NEWRULE && h->nlmsg_type != RTM_DELRULE)
@@ -312,6 +316,9 @@ int netlink_rule_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
 	if (tb[FRA_PROTOCOL])
 		proto = *(uint8_t *)RTA_DATA(tb[FRA_PROTOCOL]);
 
+	if (tb[FRA_IP_PROTO])
+		ip_proto = *(uint8_t *)RTA_DATA(tb[FRA_IP_PROTO]);
+
 	ifname = (char *)RTA_DATA(tb[FRA_IFNAME]);
 	strlcpy(rule.ifname, ifname, sizeof(rule.ifname));
 
@@ -326,7 +333,7 @@ int netlink_rule_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
 			ret = dplane_pbr_rule_delete(&rule);
 
 			zlog_debug(
-				"%s: %s leftover rule: family %s IF %s Pref %u Src %pFX Dst %pFX Table %u",
+				"%s: %s leftover rule: family %s IF %s Pref %u Src %pFX Dst %pFX Table %u ip-proto: %u",
 				__func__,
 				((ret == ZEBRA_DPLANE_REQUEST_FAILURE)
 					 ? "Failed to remove"
@@ -334,7 +341,7 @@ int netlink_rule_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
 				nl_family_to_str(frh->family), rule.ifname,
 				rule.rule.priority, &rule.rule.filter.src_ip,
 				&rule.rule.filter.dst_ip,
-				rule.rule.action.table);
+				rule.rule.action.table, ip_proto);
 		}
 
 		/* TBD */
@@ -349,11 +356,12 @@ int netlink_rule_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
 
 	if (IS_ZEBRA_DEBUG_KERNEL)
 		zlog_debug(
-			"Rx %s family %s IF %s Pref %u Src %pFX Dst %pFX Table %u",
+			"Rx %s family %s IF %s Pref %u Src %pFX Dst %pFX Table %u ip-proto: %u",
 			nl_msg_type_to_str(h->nlmsg_type),
 			nl_family_to_str(frh->family), rule.ifname,
 			rule.rule.priority, &rule.rule.filter.src_ip,
-			&rule.rule.filter.dst_ip, rule.rule.action.table);
+			&rule.rule.filter.dst_ip, rule.rule.action.table,
+			ip_proto);
 
 	return kernel_pbr_rule_del(&rule);
 }