diff options
Diffstat (limited to 'src/network/netdev/bareudp.c')
| -rw-r--r-- | src/network/netdev/bareudp.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/network/netdev/bareudp.c b/src/network/netdev/bareudp.c new file mode 100644 index 0000000..22c0e49 --- /dev/null +++ b/src/network/netdev/bareudp.c @@ -0,0 +1,138 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later + * Copyright © 2020 VMware, Inc. */ + +#include "bareudp.h" +#include "netlink-util.h" +#include "networkd-manager.h" +#include "string-table.h" + +static const char* const bare_udp_protocol_table[_BARE_UDP_PROTOCOL_MAX] = { + [BARE_UDP_PROTOCOL_IPV4] = "ipv4", + [BARE_UDP_PROTOCOL_IPV6] = "ipv6", + [BARE_UDP_PROTOCOL_MPLS_UC] = "mpls-uc", + [BARE_UDP_PROTOCOL_MPLS_MC] = "mpls-mc", +}; + +DEFINE_STRING_TABLE_LOOKUP(bare_udp_protocol, BareUDPProtocol); +DEFINE_CONFIG_PARSE_ENUM(config_parse_bare_udp_iftype, bare_udp_protocol, BareUDPProtocol, + "Failed to parse EtherType="); + +/* callback for bareudp netdev's created without a backing Link */ +static int bare_udp_netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) { + int r; + + assert(netdev); + assert(netdev->state != _NETDEV_STATE_INVALID); + + r = sd_netlink_message_get_errno(m); + if (r == -EEXIST) + log_netdev_info(netdev, "BareUDP netdev exists, using existing without changing its parameters."); + else if (r < 0) { + log_netdev_warning_errno(netdev, r, "BareUDP netdev could not be created: %m"); + netdev_drop(netdev); + + return 1; + } + + log_netdev_debug(netdev, "BareUDP created."); + + return 1; +} + +static int netdev_bare_udp_create(NetDev *netdev) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; + BareUDP *u; + int r; + + assert(netdev); + + u = BAREUDP(netdev); + + assert(u); + + r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m"); + + r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m"); + + r = sd_netlink_message_open_container(m, IFLA_LINKINFO); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); + + r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); + + r = sd_netlink_message_append_u16(m, IFLA_BAREUDP_ETHERTYPE, htobe16(u->iftype)); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_BAREUDP_ETHERTYPE attribute: %m"); + + r = sd_netlink_message_append_u16(m, IFLA_BAREUDP_PORT, htobe16(u->dest_port)); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_BAREUDP_PORT attribute: %m"); + + r = sd_netlink_message_close_container(m); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); + + r = sd_netlink_message_close_container(m); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); + + r = netlink_call_async(netdev->manager->rtnl, NULL, m, bare_udp_netdev_create_handler, + netdev_destroy_callback, netdev); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); + + netdev_ref(netdev); + netdev->state = NETDEV_STATE_CREATING; + + log_netdev_debug(netdev, "Creating"); + + return r; +} + +static int netdev_bare_udp_verify(NetDev *netdev, const char *filename) { + BareUDP *u; + + assert(netdev); + assert(filename); + + u = BAREUDP(netdev); + + assert(u); + + if (u->dest_port == 0) + return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), + "%s: BareUDP DesinationPort= is not set. Ignoring.", filename); + + if (u->iftype == _BARE_UDP_PROTOCOL_INVALID) + return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), + "%s: BareUDP EtherType= is not set. Ignoring.", filename); + + return 0; +} + +static void bare_udp_init(NetDev *netdev) { + BareUDP *u; + + assert(netdev); + + u = BAREUDP(netdev); + + assert(u); + + u->iftype = _BARE_UDP_PROTOCOL_INVALID; +} + +const NetDevVTable bare_udp_vtable = { + .object_size = sizeof(BareUDP), + .sections = NETDEV_COMMON_SECTIONS "BareUDP\0", + .init = bare_udp_init, + .config_verify = netdev_bare_udp_verify, + .create = netdev_bare_udp_create, + .create_type = NETDEV_CREATE_INDEPENDENT, +}; |