sd-netlink: add sd_netlink_sendv

nftables uses a transaction-based netlink model: one netlink write
comes with multiple messages.

A 'BEGIN' message to tell nf_tables/kernel that a new transaction starts.

Then, one more messages to add/delete tables/chains/rules etc.

Lastly, an END message that commits all changes.

This function will be used to send all the individual messages that should
make up a single transaction as a single write.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/systemd/sd-netlink.h b/src/systemd/sd-netlink.h
index 15fa84de28..2b52c4ca88 100644
--- a/src/systemd/sd-netlink.h
+++ b/src/systemd/sd-netlink.h
@@ -60,6 +60,7 @@ sd_netlink *sd_netlink_ref(sd_netlink *nl);
 sd_netlink *sd_netlink_unref(sd_netlink *nl);
 
 int sd_netlink_send(sd_netlink *nl, sd_netlink_message *message, uint32_t *serial);
+int sd_netlink_sendv(sd_netlink *nl, sd_netlink_message *messages[], size_t msgcnt, uint32_t **ret_serial);
 int sd_netlink_call_async(sd_netlink *nl, sd_netlink_slot **ret_slot, sd_netlink_message *message,
                           sd_netlink_message_handler_t callback, sd_netlink_destroy_t destoy_callback,
                           void *userdata, uint64_t usec, const char *description);