[RFC PATCH 10/14] config: clamp ra_hoplimit to maximum (instead of complaining)

[Paul Donald]

From: Paul Donald <newtwen at gmail.com>

Attempt to be helpful.

Signed-off-by: Paul Donald <newtwen at gmail.com>
---
 src/config.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/config.c b/src/config.c
index 54fb9b5..e0f2d80 100644
--- a/src/config.c
+++ b/src/config.c
@@ -961,11 +961,12 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
 	if ((c = tb[IFACE_ATTR_RA_HOPLIMIT])) {
 		uint32_t ra_hoplimit = blobmsg_get_u32(c);
 
-		if (ra_hoplimit <= 255)
-			iface->ra_hoplimit = ra_hoplimit;
-		else
-			syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
-					iface_attrs[IFACE_ATTR_RA_HOPLIMIT].name, iface->name);
+		/* rfc4861#section-6.2.1 : AdvCurHopLimit */
+		iface->ra_hoplimit = (ra_hoplimit <= 255)? ra_hoplimit : 255;
+		if(ra_hoplimit > 255)
+			syslog(LOG_INFO, "Clamped invalid %s value configured for interface '%s' to %d",
+					iface_attrs[IFACE_ATTR_RA_HOPLIMIT].name, iface->name, iface->ra_hoplimit);
+
 	}
 
 	if ((c = tb[IFACE_ATTR_RA_MTU])) {
-- 
2.44.0