networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file

Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done
with DHCPv4 and IPv4LL.

1 files changed, 165 insertions, 0 deletions

diff --git a/src/network/networkd-dhcp6.c b/src/network/networkd-dhcp6.c
new file mode 100644
index 0000000000..bf8d78b6d0
--- /dev/null
+++ b/src/network/networkd-dhcp6.c
@@ -0,0 +1,165 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  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 <netinet/ether.h>
+#include <linux/if.h>
+
+#include "networkd-link.h"
+#include "network-internal.h"
+
+#include "sd-icmp6-nd.h"
+#include "sd-dhcp6-client.h"
+
+static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
+        Link *link = userdata;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch(event) {
+        case DHCP6_EVENT_STOP:
+        case DHCP6_EVENT_RESEND_EXPIRE:
+        case DHCP6_EVENT_RETRANS_MAX:
+        case DHCP6_EVENT_IP_ACQUIRE:
+                log_link_debug(link, "DHCPv6 event %d", event);
+
+                break;
+
+        default:
+                if (event < 0)
+                        log_link_warning(link, "DHCPv6 error: %s",
+                                         strerror(-event));
+                else
+                        log_link_warning(link, "DHCPv6 unknown event: %d",
+                                         event);
+                return;
+        }
+}
+
+static int dhcp6_configure(Link *link) {
+        int r;
+
+        assert_return(link, -EINVAL);
+
+        if (link->dhcp6_client)
+                return 0;
+
+        r = sd_dhcp6_client_new(&link->dhcp6_client);
+        if (r < 0)
+                return r;
+
+        r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
+        if (r < 0) {
+                link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+                return r;
+        }
+
+        r = sd_dhcp6_client_set_mac(link->dhcp6_client,
+                                    (const uint8_t *) &link->mac,
+                                    sizeof (link->mac), ARPHRD_ETHER);
+        if (r < 0) {
+                link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+                return r;
+        }
+
+        r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
+        if (r < 0) {
+                link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+                return r;
+        }
+
+        r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
+                                         link);
+        if (r < 0) {
+                link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+                return r;
+        }
+
+        r = sd_dhcp6_client_start(link->dhcp6_client);
+        if (r < 0)
+                link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
+
+        return r;
+}
+
+static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
+        Link *link = userdata;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch(event) {
+        case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE:
+        case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER:
+                return;
+
+        case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
+        case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED:
+                break;
+
+        default:
+                if (event < 0)
+                        log_link_warning(link, "ICMPv6 error: %s",
+                                         strerror(-event));
+                else
+                        log_link_warning(link, "ICMPv6 unknown event: %d",
+                                         event);
+
+                return;
+        }
+
+        dhcp6_configure(link);
+}
+
+int icmp6_configure(Link *link) {
+        int r;
+
+        assert_return(link, -EINVAL);
+
+        r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
+        if (r < 0)
+                return r;
+
+        r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery, NULL, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery, &link->mac);
+        if (r < 0)
+                return r;
+
+        r = sd_icmp6_nd_set_index(link->icmp6_router_discovery, link->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery,
+                                icmp6_router_handler, link);
+
+        return r;
+}