Yu Watanabe
007899f43e
Drop multicast bit and set local bit of the specified MAC address. This also makes failure in generating persistent MAC address non-critical.
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <linux/if_arp.h>
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#include <linux/veth.h>
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#include "netlink-util.h"
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#include "veth.h"
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static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
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Veth *v;
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int r;
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assert(netdev);
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assert(!link);
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assert(m);
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v = VETH(netdev);
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assert(v);
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r = sd_netlink_message_open_container(m, VETH_INFO_PEER);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append VETH_INFO_PEER attribute: %m");
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if (v->ifname_peer) {
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r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Failed to add netlink interface name: %m");
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}
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if (v->hw_addr_peer.length > 0) {
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r = netlink_message_append_hw_addr(m, IFLA_ADDRESS, &v->hw_addr_peer);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
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}
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if (netdev->mtu != 0) {
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r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
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}
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r = sd_netlink_message_close_container(m);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
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return r;
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}
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static int netdev_veth_verify(NetDev *netdev, const char *filename) {
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Veth *v;
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int r;
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assert(netdev);
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assert(filename);
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v = VETH(netdev);
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assert(v);
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if (!v->ifname_peer)
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return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
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"Veth NetDev without peer name configured in %s. Ignoring",
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filename);
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r = netdev_generate_hw_addr(netdev, v->ifname_peer, &v->hw_addr_peer);
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if (r < 0)
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return r;
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return 0;
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}
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static void veth_done(NetDev *n) {
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Veth *v;
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assert(n);
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v = VETH(n);
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assert(v);
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free(v->ifname_peer);
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}
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const NetDevVTable veth_vtable = {
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.object_size = sizeof(Veth),
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.sections = NETDEV_COMMON_SECTIONS "Peer\0",
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.done = veth_done,
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.fill_message_create = netdev_veth_fill_message_create,
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.create_type = NETDEV_CREATE_INDEPENDENT,
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.config_verify = netdev_veth_verify,
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.iftype = ARPHRD_ETHER,
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.generate_mac = true,
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};
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