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authorTom Gundersen <teg@jklm.no>2013-10-17 03:18:36 +0200
committerTom Gundersen <teg@jklm.no>2013-11-09 23:41:17 +0100
commitf579559b3a14c1f1ef96c372e7626c4733e6ef7d (patch)
treee3e3eb1079c9ab5cff88a3ee08c613d9b80a69ee /src/network/networkd-address.c
parentf52841825ad01e80465aa662358c57dc7addbb9a (diff)
networkd: add a basic network daemon
This daemon listens for and configures network devices tagged with 'systemd-networkd'. By default, no devices are tagged so this daemon can safely run in parallel with existing network daemons/scripts. Networks are configured in /etc/systemd/network/*.network. The first .network file that matches a given link is applied. The matching logic is similar to the one for .link files, but additionally supports matching on interface name. The mid-term aim is to provide an alternative to ad-hoc scripts currently used in initrd's and for wired setups that don't change much (e.g., as seen on servers/and some embedded systems). Currently, static addresses and a gateway can be configured. Example .network file: [Match] Name=wlp2s0 [Network] Description=My Network Gateway=192.168.1.1 Address=192.168.1.23/24 Address=fe80::9aee:94ff:fe3f:c618/64
Diffstat (limited to 'src/network/networkd-address.c')
-rw-r--r--src/network/networkd-address.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
new file mode 100644
index 0000000000..9a7106e834
--- /dev/null
+++ b/src/network/networkd-address.c
@@ -0,0 +1,169 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ 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 <net/if.h>
+
+#include "networkd.h"
+
+#include "utf8.h"
+#include "util.h"
+#include "conf-parser.h"
+#include "net-util.h"
+
+int address_new(Network *network, Address **ret) {
+ _cleanup_address_free_ Address *address = NULL;
+
+ address = new0(Address, 1);
+ if (!address)
+ return -ENOMEM;
+
+ address->network = network;
+
+ LIST_PREPEND(addresses, network->addresses, address);
+
+ *ret = address;
+ address = NULL;
+
+ return 0;
+}
+
+void address_free(Address *address) {
+ if (!address)
+ return;
+
+ LIST_REMOVE(addresses, address->network->addresses, address);
+
+ free(address->label);
+ free(address);
+}
+
+int address_configure(Manager *manager, Address *address, Link *link) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ r = sd_rtnl_message_addr_new(RTM_NEWADDR, link->ifindex,
+ address->family, address->prefixlen,
+ IFA_F_PERMANENT, RT_SCOPE_UNIVERSE, &req);
+ if (r < 0) {
+ log_error("Could not allocate RTM_NEWADDR message: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append(req, IFA_LOCAL, &address->in_addr);
+ if (r < 0) {
+ log_error("Could not append IFA_LOCAL attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (address->family == AF_INET) {
+ struct in_addr broadcast;
+
+ broadcast.s_addr = address->in_addr.in.s_addr |
+ htonl(0xfffffffflu >> address->prefixlen);
+
+ r = sd_rtnl_message_append(req, IFA_BROADCAST, &broadcast);
+ if (r < 0) {
+ log_error("Could not append IFA_BROADCAST attribute: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (address->label) {
+ r = sd_rtnl_message_append(req, IFA_LABEL, address->label);
+ if (r < 0) {
+ log_error("Could not append IFA_LABEL attribute: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ r = sd_rtnl_send_with_reply_and_block(manager->rtnl, req, 0, NULL);
+ if (r < 0) {
+ log_error("Could not configure address: %s", strerror(-r));
+ return r != -EEXIST ? r : 0;
+ }
+
+ log_info("Configured interface address");
+
+ return 0;
+}
+
+int config_parse_address(const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+ _cleanup_address_free_ Address *n = NULL;
+ _cleanup_free_ char *address = NULL;
+ const char *e;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = address_new(userdata, &n);
+ if (r < 0)
+ return r;
+
+ /* Address=address/prefixlen */
+
+ /* prefixlen */
+ e = strchr(rvalue, '/');
+ if (e) {
+ unsigned i;
+ r = safe_atou(e + 1, &i);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Interface prefix length is invalid, "
+ "ignoring assignment: %s", e + 1);
+ return 0;
+ }
+
+ n->prefixlen = (unsigned char) i;
+ address = strndup(rvalue, e - rvalue);
+ if (!address)
+ return log_oom();
+ } else {
+ address = strdup(rvalue);
+ if (!address)
+ return log_oom();
+ }
+
+ r = net_parse_inaddr(address, &n->family, &n->in_addr);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Address is invalid, ignoring assignment: %s", address);
+ return 0;
+ }
+
+ n = NULL;
+
+ return 0;
+}