38ee31a6e4
Add a "org.freedesktop.network1.DHCPServer" DBus interface that will be added on a link path where a DHCP server is provided. Currently, it only exposes a "Leases" property, although there are plans to expand it further. The property is updated thanks to the dhcp_server_callback().
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "sd-dhcp-server.h"
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#include "alloc-util.h"
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#include "bus-common-errors.h"
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#include "bus-util.h"
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#include "dhcp-server-internal.h"
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#include "networkd-dhcp-server-bus.h"
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#include "networkd-link-bus.h"
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#include "networkd-manager.h"
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#include "strv.h"
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static int property_get_leases(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Link *l = userdata;
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sd_dhcp_server *s;
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DHCPLease *lease;
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Iterator i;
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int r;
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assert(reply);
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assert(l);
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s = l->dhcp_server;
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if (!s)
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return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Link %s has no DHCP server.", l->ifname);
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r = sd_bus_message_open_container(reply, 'a', "(uayayayayt)");
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if (r < 0)
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return r;
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HASHMAP_FOREACH(lease, s->leases_by_client_id, i) {
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r = sd_bus_message_open_container(reply, 'r', "uayayayayt");
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if (r < 0)
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return r;
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r = sd_bus_message_append(reply, "u", (uint32_t)AF_INET);
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if (r < 0)
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return r;
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r = sd_bus_message_append_array(reply, 'y', lease->client_id.data, lease->client_id.length);
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if (r < 0)
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return r;
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r = sd_bus_message_append_array(reply, 'y', &lease->address, sizeof(lease->address));
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if (r < 0)
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return r;
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r = sd_bus_message_append_array(reply, 'y', &lease->gateway, sizeof(lease->gateway));
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if (r < 0)
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return r;
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r = sd_bus_message_append_array(reply, 'y', &lease->chaddr, sizeof(lease->chaddr));
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if (r < 0)
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return r;
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r = sd_bus_message_append_basic(reply, 't', &lease->expiration);
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if (r < 0)
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return r;
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r = sd_bus_message_close_container(reply);
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if (r < 0)
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return r;
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}
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return sd_bus_message_close_container(reply);
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}
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static int dhcp_server_emit_changed(Link *link, const char *property, ...) {
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_cleanup_free_ char *path = NULL;
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char **l;
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assert(link);
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path = link_bus_path(link);
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if (!path)
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return log_oom();
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l = strv_from_stdarg_alloca(property);
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return sd_bus_emit_properties_changed_strv(
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link->manager->bus,
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path,
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"org.freedesktop.network1.DHCPServer",
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l);
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}
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void dhcp_server_callback(sd_dhcp_server *s, uint64_t event, void *data) {
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Link *l = data;
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assert(l);
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if (event & SD_DHCP_SERVER_EVENT_LEASE_CHANGED)
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(void) dhcp_server_emit_changed(l, "Leases", NULL);
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}
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const sd_bus_vtable dhcp_server_vtable[] = {
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SD_BUS_VTABLE_START(0),
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SD_BUS_PROPERTY("Leases", "a(uayayayayt)", property_get_leases, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_VTABLE_END
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};
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