sd-dhcp-server: add basic functionality for creating/destroying server instance

4 files changed, 195 insertions, 0 deletions

diff --git a/src/libsystemd-network/dhcp-network.c b/src/libsystemd-network/dhcp-network.c
index 6fac80e873..266bf13178 100644
--- a/src/libsystemd-network/dhcp-network.c
+++ b/src/libsystemd-network/dhcp-network.c
@@ -117,6 +117,7 @@ int dhcp_network_bind_udp_socket(be32_t address, uint16_t port) {
         r = setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
         if (r < 0)
                 return -errno;
+
         if (address == INADDR_ANY) {
                 int on = 1;
 
diff --git a/src/libsystemd-network/dhcp-server-internal.h b/src/libsystemd-network/dhcp-server-internal.h
new file mode 100644
index 0000000000..e09b35936f
--- /dev/null
+++ b/src/libsystemd-network/dhcp-server-internal.h
@@ -0,0 +1,40 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation. All rights reserved.
+  Copyright (C) 2014 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "sd-event.h"
+#include "sd-dhcp-server.h"
+
+#include "refcnt.h"
+#include "util.h"
+#include "log.h"
+
+struct sd_dhcp_server {
+        RefCount n_ref;
+
+        sd_event *event;
+        int event_priority;
+};
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp_server*, sd_dhcp_server_unref);
+#define _cleanup_dhcp_server_unref_ _cleanup_(sd_dhcp_server_unrefp)
+
+#define log_dhcp_server(client, fmt, ...) log_meta(LOG_DEBUG, __FILE__, __LINE__, __func__, "DHCP SERVER: " fmt, ##__VA_ARGS__)
diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
new file mode 100644
index 0000000000..885d68d335
--- /dev/null
+++ b/src/libsystemd-network/sd-dhcp-server.c
@@ -0,0 +1,92 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation. All rights reserved.
+  Copyright (C) 2014 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "sd-dhcp-server.h"
+#include "dhcp-server-internal.h"
+
+sd_dhcp_server *sd_dhcp_server_ref(sd_dhcp_server *server) {
+        if (server)
+                assert_se(REFCNT_INC(server->n_ref) >= 2);
+
+        return server;
+}
+
+sd_dhcp_server *sd_dhcp_server_unref(sd_dhcp_server *server) {
+        if (server && REFCNT_DEC(server->n_ref) <= 0) {
+                log_dhcp_server(server, "UNREF");
+
+                sd_event_unref(server->event);
+                free(server);
+        }
+
+        return NULL;
+}
+
+int sd_dhcp_server_new(sd_dhcp_server **ret) {
+        _cleanup_dhcp_server_unref_ sd_dhcp_server *server = NULL;
+
+        assert_return(ret, -EINVAL);
+
+        server = new0(sd_dhcp_server, 1);
+        if (!server)
+                return -ENOMEM;
+
+        server->n_ref = REFCNT_INIT;
+
+        *ret = server;
+        server = NULL;
+
+        return 0;
+}
+
+int sd_dhcp_server_attach_event(sd_dhcp_server *server, sd_event *event, int priority) {
+        int r;
+
+        assert_return(server, -EINVAL);
+        assert_return(!server->event, -EBUSY);
+
+        if (event)
+                server->event = sd_event_ref(event);
+        else {
+                r = sd_event_default(&server->event);
+                if (r < 0)
+                        return r;
+        }
+
+        server->event_priority = priority;
+
+        return 0;
+}
+
+int sd_dhcp_server_detach_event(sd_dhcp_server *server) {
+        assert_return(server, -EINVAL);
+
+        server->event = sd_event_unref(server->event);
+
+        return 0;
+}
+
+sd_event *sd_dhcp_server_get_event(sd_dhcp_server *server) {
+        assert_return(server, NULL);
+
+        return server->event;
+}
diff --git a/src/libsystemd-network/test-dhcp-server.c b/src/libsystemd-network/test-dhcp-server.c
new file mode 100644
index 0000000000..bd0913d51c
--- /dev/null
+++ b/src/libsystemd-network/test-dhcp-server.c
@@ -0,0 +1,62 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation. All rights reserved.
+  Copyright (C) 2014 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <errno.h>
+
+#include "sd-event.h"
+#include "event-util.h"
+
+#include "sd-dhcp-server.h"
+#include "dhcp-server-internal.h"
+
+static void test_basic(sd_event *event) {
+        _cleanup_dhcp_server_unref_ sd_dhcp_server *server = NULL;
+
+        assert_se(sd_dhcp_server_new(&server) >= 0);
+        assert_se(server);
+
+        assert_se(sd_dhcp_server_attach_event(server, event, 0) >= 0);
+        assert_se(sd_dhcp_server_attach_event(server, event, 0) == -EBUSY);
+        assert_se(sd_dhcp_server_get_event(server) == event);
+        assert_se(sd_dhcp_server_detach_event(server) >= 0);
+        assert_se(!sd_dhcp_server_get_event(server));
+        assert_se(sd_dhcp_server_attach_event(server, NULL, 0) >= 0);
+        assert_se(sd_dhcp_server_attach_event(server, NULL, 0) == -EBUSY);
+
+        assert_se(sd_dhcp_server_ref(server) == server);
+        assert_se(!sd_dhcp_server_unref(server));
+}
+
+int main(int argc, char *argv[]) {
+        _cleanup_event_unref_ sd_event *e;
+
+        log_set_max_level(LOG_DEBUG);
+        log_parse_environment();
+        log_open();
+
+        assert_se(sd_event_new(&e) >= 0);
+
+        test_basic(e);
+
+        return 0;
+}