can: gw: Properly fill the netlink header when responding to RTM_GETROUTE

 - set message type to RTM_NEWROUTE
 - relate to original request by inheriting the sequence and port number.
 - set NLM_F_MULTI because it's a dump and more messages will follow

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

1 files changed, 7 insertions, 3 deletions

diff --git a/net/can/gw.c b/net/can/gw.c
index a1c639c730a3..20c36e10ce85 100644
--- a/net/can/gw.c
+++ b/net/can/gw.c
@@ -444,11 +444,14 @@ static int cgw_notifier(struct notifier_block *nb,
         return NOTIFY_DONE;
 }
 
-static int cgw_put_job(struct sk_buff *skb, struct cgw_job *gwj)
+static int cgw_put_job(struct sk_buff *skb, struct cgw_job *gwj, int type,
+                       u32 pid, u32 seq, int flags)
 {
         struct cgw_frame_mod mb;
         struct rtcanmsg *rtcan;
-        struct nlmsghdr *nlh = nlmsg_put(skb, 0, 0, 0, sizeof(*rtcan), 0);
+        struct nlmsghdr *nlh;
+
+        nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtcan), flags);
         if (!nlh)
                 return -EMSGSIZE;
 
@@ -546,7 +549,8 @@ static int cgw_dump_jobs(struct sk_buff *skb, struct netlink_callback *cb)
                 if (idx < s_idx)
                         goto cont;
 
-                if (cgw_put_job(skb, gwj) < 0)
+                if (cgw_put_job(skb, gwj, RTM_NEWROUTE, NETLINK_CB(cb->skb).pid,
+                    cb->nlh->nlmsg_seq, NLM_F_MULTI) < 0)
                         break;
 cont:
                 idx++;