2018-11-29 04:00:58 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "sd-netlink.h"
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "ether-addr-util.h"
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#include "hashmap.h"
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#include "in-addr-util.h"
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#include "netlink-util.h"
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#include "networkd-link.h"
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#include "networkd-manager.h"
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#include "networkd-neighbor.h"
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void neighbor_free(Neighbor *neighbor) {
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if (!neighbor)
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return;
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if (neighbor->network) {
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LIST_REMOVE(neighbors, neighbor->network->neighbors, neighbor);
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assert(neighbor->network->n_neighbors > 0);
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neighbor->network->n_neighbors--;
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if (neighbor->section) {
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hashmap_remove(neighbor->network->neighbors_by_section, neighbor->section);
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network_config_section_free(neighbor->section);
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}
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}
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free(neighbor);
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}
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static int neighbor_new_static(Network *network, const char *filename, unsigned section_line, Neighbor **ret) {
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_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
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_cleanup_(neighbor_freep) Neighbor *neighbor = NULL;
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int r;
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assert(network);
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assert(ret);
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assert(!!filename == (section_line > 0));
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if (filename) {
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r = network_config_section_new(filename, section_line, &n);
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if (r < 0)
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return r;
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neighbor = hashmap_get(network->neighbors_by_section, n);
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if (neighbor) {
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*ret = TAKE_PTR(neighbor);
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return 0;
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}
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}
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neighbor = new(Neighbor, 1);
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if (!neighbor)
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return -ENOMEM;
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*neighbor = (Neighbor) {
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.network = network,
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.family = AF_UNSPEC,
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};
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LIST_APPEND(neighbors, network->neighbors, neighbor);
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network->n_neighbors++;
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if (filename) {
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neighbor->section = TAKE_PTR(n);
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r = hashmap_ensure_allocated(&network->neighbors_by_section, &network_config_hash_ops);
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if (r < 0)
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return r;
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r = hashmap_put(network->neighbors_by_section, neighbor->section, neighbor);
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if (r < 0)
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return r;
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}
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*ret = TAKE_PTR(neighbor);
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return 0;
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}
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static int neighbor_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert(link);
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assert(link->neighbor_messages > 0);
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link->neighbor_messages--;
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 1;
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST)
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log_link_warning_errno(link, r, "Could not set neighbor: %m");
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if (link->neighbor_messages == 0) {
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log_link_debug(link, "Neighbors set");
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link->neighbors_configured = true;
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link_check_ready(link);
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}
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return 1;
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}
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int neighbor_configure(Neighbor *neighbor, Link *link, link_netlink_message_handler_t callback) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
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int r;
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assert(neighbor);
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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if (neighbor->family == AF_UNSPEC)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Neighbor without Address= configured");
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if (!neighbor->mac_configured)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Neighbor without MACAddress= configured");
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r = sd_rtnl_message_new_neigh(link->manager->rtnl, &req, RTM_NEWNEIGH,
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link->ifindex, neighbor->family);
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if (r < 0)
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return log_error_errno(r, "Could not allocate RTM_NEWNEIGH message: %m");
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r = sd_rtnl_message_neigh_set_state(req, NUD_PERMANENT);
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if (r < 0)
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return log_error_errno(r, "Could not set state: %m");
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r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE);
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if (r < 0)
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return log_error_errno(r, "Could not set flags: %m");
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2019-07-11 03:17:30 +02:00
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r = sd_netlink_message_append_data(req, NDA_LLADDR, &neighbor->mac, sizeof(neighbor->mac));
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2018-11-29 04:00:58 +01:00
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if (r < 0)
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return log_error_errno(r, "Could not append NDA_LLADDR attribute: %m");
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2019-02-03 01:47:25 +01:00
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r = netlink_message_append_in_addr_union(req, NDA_DST, neighbor->family, &neighbor->in_addr);
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if (r < 0)
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return log_error_errno(r, "Could not append NDA_DST attribute: %m");
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2018-11-29 04:00:58 +01:00
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r = netlink_call_async(link->manager->rtnl, NULL, req, callback ?: neighbor_handler,
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link_netlink_destroy_callback, link);
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if (r < 0)
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return log_error_errno(r, "Could not send rtnetlink message: %m");
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link->neighbor_messages++;
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link_ref(link);
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return 0;
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}
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int config_parse_neighbor_address(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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2019-03-01 05:27:47 +01:00
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_cleanup_(neighbor_free_or_set_invalidp) Neighbor *n = NULL;
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2018-11-29 04:00:58 +01:00
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = neighbor_new_static(network, filename, section_line, &n);
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if (r < 0)
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return r;
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r = in_addr_from_string_auto(rvalue, &n->family, &n->in_addr);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Neighbor Address is invalid, ignoring assignment: %s", rvalue);
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return 0;
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}
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TAKE_PTR(n);
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return 0;
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}
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int config_parse_neighbor_hwaddr(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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2019-03-01 05:27:47 +01:00
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_cleanup_(neighbor_free_or_set_invalidp) Neighbor *n = NULL;
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2018-11-29 04:00:58 +01:00
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = neighbor_new_static(network, filename, section_line, &n);
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if (r < 0)
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return r;
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r = ether_addr_from_string(rvalue, &n->mac);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Neighbor MACAddress is invalid, ignoring assignment: %s", rvalue);
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return 0;
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}
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n->mac_configured = true;
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TAKE_PTR(n);
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return 0;
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}
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