diff options
Diffstat (limited to 'src/network/netdev/bridge.c')
| -rw-r--r-- | src/network/netdev/bridge.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/network/netdev/bridge.c b/src/network/netdev/bridge.c new file mode 100644 index 0000000..3e394ed --- /dev/null +++ b/src/network/netdev/bridge.c @@ -0,0 +1,253 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <net/if.h> +#include <netinet/in.h> +#include <linux/if_arp.h> +#include <linux/if_bridge.h> + +#include "bridge.h" +#include "netlink-util.h" +#include "networkd-manager.h" +#include "string-table.h" +#include "vlan-util.h" + +assert_cc((int) MULTICAST_ROUTER_NONE == (int) MDB_RTR_TYPE_DISABLED); +assert_cc((int) MULTICAST_ROUTER_TEMPORARY_QUERY == (int) MDB_RTR_TYPE_TEMP_QUERY); +assert_cc((int) MULTICAST_ROUTER_PERMANENT == (int) MDB_RTR_TYPE_PERM); +assert_cc((int) MULTICAST_ROUTER_TEMPORARY == (int) MDB_RTR_TYPE_TEMP); + +static const char* const multicast_router_table[_MULTICAST_ROUTER_MAX] = { + [MULTICAST_ROUTER_NONE] = "no", + [MULTICAST_ROUTER_TEMPORARY_QUERY] = "query", + [MULTICAST_ROUTER_PERMANENT] = "permanent", + [MULTICAST_ROUTER_TEMPORARY] = "temporary", +}; + +DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(multicast_router, MulticastRouter, _MULTICAST_ROUTER_INVALID); +DEFINE_CONFIG_PARSE_ENUM(config_parse_multicast_router, multicast_router, MulticastRouter, + "Failed to parse bridge multicast router setting"); + +/* callback for bridge netdev's parameter set */ +static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) { + int r; + + assert(netdev); + assert(m); + + r = sd_netlink_message_get_errno(m); + if (r < 0) { + log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m"); + return 1; + } + + log_netdev_debug(netdev, "Bridge parameters set success"); + + return 1; +} + +static int netdev_bridge_post_create_message(NetDev *netdev, sd_netlink_message *req) { + Bridge *b = BRIDGE(netdev); + int r; + + r = sd_netlink_message_open_container(req, IFLA_LINKINFO); + if (r < 0) + return r; + + r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); + if (r < 0) + return r; + + /* convert to jiffes */ + if (b->forward_delay != USEC_INFINITY) { + r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay)); + if (r < 0) + return r; + } + + if (b->hello_time > 0) { + r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time)); + if (r < 0) + return r; + } + + if (b->max_age > 0) { + r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age)); + if (r < 0) + return r; + } + + if (b->ageing_time != USEC_INFINITY) { + r = sd_netlink_message_append_u32(req, IFLA_BR_AGEING_TIME, usec_to_jiffies(b->ageing_time)); + if (r < 0) + return r; + } + + if (b->priority > 0) { + r = sd_netlink_message_append_u16(req, IFLA_BR_PRIORITY, b->priority); + if (r < 0) + return r; + } + + if (b->group_fwd_mask > 0) { + r = sd_netlink_message_append_u16(req, IFLA_BR_GROUP_FWD_MASK, b->group_fwd_mask); + if (r < 0) + return r; + } + + if (b->default_pvid != VLANID_INVALID) { + r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_DEFAULT_PVID, b->default_pvid); + if (r < 0) + return r; + } + + if (b->mcast_querier >= 0) { + r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier); + if (r < 0) + return r; + } + + if (b->mcast_snooping >= 0) { + r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping); + if (r < 0) + return r; + } + + if (b->vlan_filtering >= 0) { + r = sd_netlink_message_append_u8(req, IFLA_BR_VLAN_FILTERING, b->vlan_filtering); + if (r < 0) + return r; + } + + if (b->vlan_protocol >= 0) { + r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_PROTOCOL, htobe16(b->vlan_protocol)); + if (r < 0) + return r; + } + + if (b->stp >= 0) { + r = sd_netlink_message_append_u32(req, IFLA_BR_STP_STATE, b->stp); + if (r < 0) + return r; + } + + if (b->igmp_version > 0) { + r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_IGMP_VERSION, b->igmp_version); + if (r < 0) + return r; + } + + r = sd_netlink_message_close_container(req); + if (r < 0) + return r; + + r = sd_netlink_message_close_container(req); + if (r < 0) + return r; + + return 0; +} + +static int netdev_bridge_post_create(NetDev *netdev, Link *link) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; + int r; + + assert(netdev); + + r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not allocate netlink message: %m"); + + r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK); + if (r < 0) + return log_link_error_errno(link, r, "Could not set netlink message flags: %m"); + + r = netdev_bridge_post_create_message(netdev, req); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not create netlink message: %m"); + + r = netlink_call_async(netdev->manager->rtnl, NULL, req, netdev_bridge_set_handler, + netdev_destroy_callback, netdev); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not send netlink message: %m"); + + netdev_ref(netdev); + + return r; +} + +int config_parse_bridge_igmp_version( + const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + assert(filename); + assert(lvalue); + assert(rvalue); + assert(data); + + Bridge *b = ASSERT_PTR(userdata); + + if (isempty(rvalue)) { + b->igmp_version = 0; /* 0 means unset. */ + return 0; + } + + return config_parse_uint8_bounded( + unit, filename, line, section, section_line, lvalue, rvalue, + 2, 3, true, + &b->igmp_version); +} + +int config_parse_bridge_port_priority( + const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + assert(filename); + assert(lvalue); + assert(rvalue); + + uint16_t *prio = ASSERT_PTR(data); + + return config_parse_uint16_bounded( + unit, filename, line, section, section_line, lvalue, rvalue, + 0, LINK_BRIDGE_PORT_PRIORITY_MAX, true, + prio); +} + +static void bridge_init(NetDev *netdev) { + Bridge *b = BRIDGE(netdev); + + b->mcast_querier = -1; + b->mcast_snooping = -1; + b->vlan_filtering = -1; + b->vlan_protocol = -1; + b->stp = -1; + b->default_pvid = VLANID_INVALID; + b->forward_delay = USEC_INFINITY; + b->ageing_time = USEC_INFINITY; +} + +const NetDevVTable bridge_vtable = { + .object_size = sizeof(Bridge), + .init = bridge_init, + .sections = NETDEV_COMMON_SECTIONS "Bridge\0", + .post_create = netdev_bridge_post_create, + .create_type = NETDEV_CREATE_INDEPENDENT, + .iftype = ARPHRD_ETHER, + .generate_mac = true, +}; |