| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| #include <net/if.h> |
| #include <netinet/in.h> |
| #include <linux/if_arp.h> |
| #include <linux/veth.h> |
| |
| #include "netlink-util.h" |
| #include "veth.h" |
| |
| static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { |
| struct hw_addr_data hw_addr; |
| Veth *v; |
| int r; |
| |
| assert(netdev); |
| assert(!link); |
| assert(m); |
| |
| v = VETH(netdev); |
| |
| assert(v); |
| |
| r = sd_netlink_message_open_container(m, VETH_INFO_PEER); |
| if (r < 0) |
| return r; |
| |
| if (v->ifname_peer) { |
| r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer); |
| if (r < 0) |
| return r; |
| } |
| |
| r = netdev_generate_hw_addr(netdev, NULL, v->ifname_peer, &v->hw_addr_peer, &hw_addr); |
| if (r < 0) |
| return r; |
| |
| if (hw_addr.length > 0) { |
| log_netdev_debug(netdev, "Using MAC address for peer: %s", HW_ADDR_TO_STR(&hw_addr)); |
| r = netlink_message_append_hw_addr(m, IFLA_ADDRESS, &hw_addr); |
| if (r < 0) |
| return r; |
| } |
| |
| if (netdev->mtu != 0) { |
| r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int netdev_veth_verify(NetDev *netdev, const char *filename) { |
| Veth *v; |
| |
| assert(netdev); |
| assert(filename); |
| |
| v = VETH(netdev); |
| |
| assert(v); |
| |
| if (!v->ifname_peer) |
| return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), |
| "Veth NetDev without peer name configured in %s. Ignoring", |
| filename); |
| |
| return 0; |
| } |
| |
| static void veth_done(NetDev *n) { |
| Veth *v; |
| |
| assert(n); |
| |
| v = VETH(n); |
| |
| assert(v); |
| |
| free(v->ifname_peer); |
| } |
| |
| const NetDevVTable veth_vtable = { |
| .object_size = sizeof(Veth), |
| .sections = NETDEV_COMMON_SECTIONS "Peer\0", |
| .done = veth_done, |
| .fill_message_create = netdev_veth_fill_message_create, |
| .create_type = NETDEV_CREATE_INDEPENDENT, |
| .config_verify = netdev_veth_verify, |
| .iftype = ARPHRD_ETHER, |
| .generate_mac = true, |
| }; |