[PATCH 6/6] add route setting for advertised mss

[Joerg Vehlow]

From: Joerg Vehlow <joerg.vehlow at aox.de>

---
 interface-ip.c | 7 +++++++
 interface-ip.h | 4 ++++
 system-linux.c | 7 +++++--
 ubus.c         | 4 ++++
 4 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/interface-ip.c b/interface-ip.c
index ab4a5cf..02314cd 100644
--- a/interface-ip.c
+++ b/interface-ip.c
@@ -44,6 +44,7 @@ enum {
 	ROUTE_TYPE,
 	ROUTE_PROTO,
 	ROUTE_DISABLED,
+	ROUTE_ADVMSS,
 	__ROUTE_MAX
 };
 
@@ -61,6 +62,7 @@ static const struct blobmsg_policy route_attr[__ROUTE_MAX] = {
 	[ROUTE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
 	[ROUTE_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
 	[ROUTE_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
+	[ROUTE_ADVMSS] = { .name ="advmss", .type = BLOBMSG_TYPE_INT32 },
 };
 
 const struct uci_blob_param_list route_attr_list = {
@@ -460,6 +462,11 @@ interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
 		route->flags |= DEVROUTE_MTU;
 	}
 
+	if ((cur = tb[ROUTE_ADVMSS]) != NULL) {
+		route->advmss = blobmsg_get_u32(cur);
+		route->flags |= DEVROUTE_ADVMSS;
+	}
+
 	/* Use source-based routing */
 	if ((cur = tb[ROUTE_SOURCE]) != NULL) {
 		char *saveptr, *source = alloca(blobmsg_data_len(cur));
diff --git a/interface-ip.h b/interface-ip.h
index 8843349..eabdb39 100644
--- a/interface-ip.h
+++ b/interface-ip.h
@@ -51,6 +51,9 @@ enum device_addr_flags {
 
 	/* neighbor mac address */
 	DEVNEIGH_MAC		= (1 << 11),
+
+	/* advertised mss */
+	DEVROUTE_ADVMSS     = (1 << 12),
 };
 
 union if_addr {
@@ -98,6 +101,7 @@ struct device_route {
 	unsigned int type;
 	unsigned int proto;
 	time_t valid_until;
+	unsigned int advmss;
 
 	/* must be last */
 	enum device_addr_flags flags;
diff --git a/system-linux.c b/system-linux.c
index 462a8cc..060c21d 100644
--- a/system-linux.c
+++ b/system-linux.c
@@ -2828,13 +2828,16 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd)
 	if (table >= 256)
 		nla_put_u32(msg, RTA_TABLE, table);
 
-	if (route->flags & DEVROUTE_MTU) {
+	if (route->flags & (DEVROUTE_MTU | DEVROUTE_ADVMSS)) {
 		struct nlattr *metrics;
 
 		if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
 			goto nla_put_failure;
 
-		nla_put_u32(msg, RTAX_MTU, route->mtu);
+		if (route->flags & DEVROUTE_MTU)
+			nla_put_u32(msg, RTAX_MTU, route->mtu);
+		if (route->flags & DEVROUTE_ADVMSS)
+			nla_put_u32(msg, RTAX_ADVMSS, route->advmss);
 
 		nla_nest_end(msg, metrics);
 	}
diff --git a/ubus.c b/ubus.c
index 3cb5c1a..8f7082d 100644
--- a/ubus.c
+++ b/ubus.c
@@ -642,6 +642,9 @@ interface_ip_dump_route_list(struct interface_ip_settings *ip, bool enabled)
 		if (route->flags & DEVROUTE_MTU)
 			blobmsg_add_u32(&b, "mtu", route->mtu);
 
+		if (route->flags & DEVROUTE_ADVMSS)
+			blobmsg_add_u32(&b, "advmss", route->advmss);
+
 		if (route->flags & DEVROUTE_METRIC)
 			blobmsg_add_u32(&b, "metric", route->metric);
 
@@ -651,6 +654,7 @@ interface_ip_dump_route_list(struct interface_ip_settings *ip, bool enabled)
 		if (route->valid_until)
 			blobmsg_add_u32(&b, "valid", route->valid_until - now);
 
+
 		buf = blobmsg_alloc_string_buffer(&b, "source", buflen);
 		inet_ntop(af, &route->source, buf, buflen);
 		snprintf(buf + strlen(buf), buflen - strlen(buf), "/%u", route->sourcemask);
-- 
2.25.1