sd-netlink: introduce sd_genl_message_get_family()

diff --git a/src/libsystemd/sd-netlink/generic-netlink.c b/src/libsystemd/sd-netlink/generic-netlink.c
index cfd9b4973dfd8877ab7f347ee8e37bc7090a930f..58dda0323d1ce356e2f6f085425afacbe2e19436 100644 (file)
--- a/src/libsystemd/sd-netlink/generic-netlink.c
+++ b/src/libsystemd/sd-netlink/generic-netlink.c
@@ -158,3 +158,19 @@ int nlmsg_type_to_genl_family(sd_netlink *nl, uint16_t type, sd_genl_family *ret
 
         return 0;
 }
+
+int sd_genl_message_get_family(sd_netlink *nl, sd_netlink_message *m, sd_genl_family *family) {
+        uint16_t type;
+        int r;
+
+        assert_return(m, -EINVAL);
+        assert_return(nl, -EINVAL);
+        assert_return(nl->protocol == NETLINK_GENERIC, -EINVAL);
+        assert_return(family, -EINVAL);
+
+        r = sd_netlink_message_get_type(m, &type);
+        if (r < 0)
+                return r;
+
+        return nlmsg_type_to_genl_family(nl, type, family);
+}

diff --git a/src/systemd/sd-netlink.h b/src/systemd/sd-netlink.h
index 283c2dd35b491d31f15c2ba042839e57287c1cbc..43a15a98c00cb8122c4dd0a6253b06a09084371d 100644 (file)
--- a/src/systemd/sd-netlink.h
+++ b/src/systemd/sd-netlink.h
@@ -204,6 +204,7 @@ int sd_rtnl_message_routing_policy_rule_get_flags(sd_netlink_message *m, unsigne
 /* genl */
 int sd_genl_socket_open(sd_netlink **nl);
 int sd_genl_message_new(sd_netlink *nl, sd_genl_family family, uint8_t cmd, sd_netlink_message **m);
+int sd_genl_message_get_family(sd_netlink *nl, sd_netlink_message *m, sd_genl_family *family);
 
 /* slot */
 sd_netlink_slot *sd_netlink_slot_ref(sd_netlink_slot *nl);