Add simple Ethernet plugin

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 8e5e8585c4021206605d82b48081dc9ef9bd793a..d0ca20ee6eb449912fd1a14a0bc240cccc4a5234 100644 (file)
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -1,8 +1,8 @@
 
 plugindir = $(libdir)/connman/plugins
 
-plugin_LTLIBRARIES = hal.la 80203.la 80211.la bluetooth.la \
-                                       dhclient.la resolvconf.la
+plugin_LTLIBRARIES = hal.la ethernet.la bluetooth.la \
+                               80203.la 80211.la dhclient.la resolvconf.la
 
 hal_la_SOURCES = hal.c
 hal_la_LIBADD = @HAL_LIBS@
@@ -12,6 +12,8 @@ hal_la_CFLAGS = @GLIB_CFLAGS@ @HAL_CFLAGS@
 
 80211_la_SOURCES = 80211.c supplicant.h supplicant.c
 
+ethernet_la_SOURCES = ethernet.c
+
 bluetooth_la_SOURCES = bluetooth.c
 
 dhclient_la_SOURCES = dhclient.c

diff --git a/plugins/ethernet.c b/plugins/ethernet.c
new file mode 100644 (file)
index 0000000..03c52d2
--- /dev/null
+++ b/plugins/ethernet.c
@@ -0,0 +1,312 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <unistd.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <linux/if.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+#include <connman/plugin.h>
+#include <connman/driver.h>
+#include <connman/log.h>
+
+static GStaticMutex ethernet_mutex = G_STATIC_MUTEX_INIT;
+static GSList *ethernet_list = NULL;
+
+static GStaticMutex element_mutex = G_STATIC_MUTEX_INIT;
+static GSList *element_list = NULL;
+
+static void create_element(struct connman_element *parent,
+                                       enum connman_element_type type)
+{
+       struct connman_element *element;
+
+       DBG("parent %p name %s", parent, parent->name);
+
+       element = connman_element_create();
+
+       element->type = type;
+       element->netdev.index = parent->netdev.index;
+       element->netdev.name = g_strdup(parent->netdev.name);
+
+       g_static_mutex_lock(&element_mutex);
+       element_list = g_slist_append(element_list, element);
+       g_static_mutex_unlock(&element_mutex);
+
+       connman_element_register(element, parent);
+}
+
+static void remove_elements(struct connman_element *parent)
+{
+       GSList *list;
+
+       DBG("parent %p name %s", parent, parent->name);
+
+       g_static_mutex_lock(&element_mutex);
+
+       for (list = element_list; list; list = list->next) {
+               struct connman_element *element = list->data;
+
+               if (element->netdev.index != parent->netdev.index)
+                       continue;
+
+               element_list = g_slist_remove(element_list, element);
+
+               connman_element_unregister(element);
+
+               connman_element_unref(element);
+       }
+
+       g_static_mutex_unlock(&element_mutex);
+}
+
+static void rtnl_link(struct nlmsghdr *hdr, const char *type)
+{
+       GSList *list;
+       struct ifinfomsg *msg;
+       int bytes;
+
+       msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
+       bytes = IFLA_PAYLOAD(hdr);
+
+       DBG("%s ifi_index %d ifi_flags 0x%04x",
+                               type, msg->ifi_index, msg->ifi_flags);
+
+       g_static_mutex_lock(&ethernet_mutex);
+
+       for (list = ethernet_list; list; list = list->next) {
+               struct connman_element *element = list->data;
+
+               if (element->type != CONNMAN_ELEMENT_TYPE_DEVICE)
+                       continue;
+
+               if (element->netdev.index != msg->ifi_index)
+                       continue;
+
+               if ((element->netdev.flags & IFF_RUNNING) ==
+                                               (msg->ifi_flags & IFF_RUNNING))
+                       continue;
+
+               element->netdev.flags = msg->ifi_flags;
+
+               if (msg->ifi_flags & IFF_RUNNING) {
+                       DBG("carrier on");
+
+                       create_element(element, CONNMAN_ELEMENT_TYPE_DHCP);
+                       create_element(element, CONNMAN_ELEMENT_TYPE_ZEROCONF);
+               } else {
+                       DBG("carrier off");
+
+                       remove_elements(element);
+               }
+       }
+
+       g_static_mutex_unlock(&ethernet_mutex);
+}
+
+static gboolean rtnl_event(GIOChannel *chan, GIOCondition cond, gpointer data)
+{
+       unsigned char buf[1024];
+       void *ptr = buf;
+       gsize len;
+       GIOError err;
+
+       if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
+               return FALSE;
+
+       memset(buf, 0, sizeof(buf));
+
+       err = g_io_channel_read(chan, (gchar *) buf, sizeof(buf), &len);
+       if (err) {
+               if (err == G_IO_ERROR_AGAIN)
+                       return TRUE;
+               return FALSE;
+       }
+
+       DBG("buf %p len %zd", buf, len);
+
+       while (len > 0) {
+               struct nlmsghdr *hdr = ptr;
+               struct nlmsgerr *err;
+
+               if (!NLMSG_OK(hdr, len))
+                       break;
+
+               DBG("len %d type %d flags 0x%04x seq %d",
+                                       hdr->nlmsg_len, hdr->nlmsg_type,
+                                       hdr->nlmsg_flags, hdr->nlmsg_seq);
+
+               switch (hdr->nlmsg_type) {
+               case NLMSG_ERROR:
+                       err = NLMSG_DATA(hdr);
+                       DBG("ERROR %d (%s)", -err->error,
+                                               strerror(-err->error));
+                       break;
+
+               case RTM_NEWLINK:
+                       rtnl_link(hdr, "NEWLINK");
+                       break;
+
+               case RTM_DELLINK:
+                       rtnl_link(hdr, "DELLINK");
+                       break;
+               }
+
+               len -= hdr->nlmsg_len;
+               ptr += hdr->nlmsg_len;
+       }
+
+       return TRUE;
+}
+
+static GIOChannel *channel = NULL;
+
+static int rtnl_request(void)
+{
+       struct {
+               struct nlmsghdr hdr;
+               struct rtgenmsg msg;
+       } req;
+
+       struct sockaddr_nl addr;
+       int sk;
+
+       DBG("");
+
+       memset(&req, 0, sizeof(req));
+       req.hdr.nlmsg_len = sizeof(req.hdr) + sizeof(req.msg);
+       req.hdr.nlmsg_type = RTM_GETLINK;
+       req.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
+       req.hdr.nlmsg_pid = 0;
+       req.hdr.nlmsg_seq = 42;
+       req.msg.rtgen_family = AF_INET;
+
+       sk = g_io_channel_unix_get_fd(channel);
+
+       memset(&addr, 0, sizeof(addr));
+       addr.nl_family = AF_NETLINK;
+
+       return sendto(sk, &req, sizeof(req), 0,
+                       (struct sockaddr *) &addr, sizeof(addr));
+}
+
+static int ethernet_probe(struct connman_element *element)
+{
+       DBG("element %p name %s", element, element->name);
+
+       g_static_mutex_lock(&ethernet_mutex);
+       ethernet_list = g_slist_append(ethernet_list, element);
+       g_static_mutex_unlock(&ethernet_mutex);
+
+       rtnl_request();
+
+       return 0;
+}
+
+static void ethernet_remove(struct connman_element *element)
+{
+       DBG("element %p name %s", element, element->name);
+
+       g_static_mutex_lock(&ethernet_mutex);
+       ethernet_list = g_slist_remove(ethernet_list, element);
+       g_static_mutex_unlock(&ethernet_mutex);
+}
+
+static struct connman_driver ethernet_driver = {
+       .name           = "ethernet",
+       .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
+       .subtype        = CONNMAN_ELEMENT_SUBTYPE_ETHERNET,
+       .probe          = ethernet_probe,
+       .remove         = ethernet_remove,
+};
+
+static int rtnl_init(void)
+{
+       struct sockaddr_nl addr;
+       int sk, err;
+
+       DBG("");
+
+       sk = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
+       if (sk < 0)
+               return -errno;
+
+       memset(&addr, 0, sizeof(addr));
+       addr.nl_family = AF_NETLINK;
+       addr.nl_groups = RTMGRP_LINK;
+
+       if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+               err = -errno;
+               close(sk);
+               return err;
+       }
+
+       channel = g_io_channel_unix_new(sk);
+       g_io_channel_set_close_on_unref(channel, TRUE);
+
+       g_io_add_watch(channel, G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
+                                                       rtnl_event, NULL);
+
+       return 0;
+}
+
+static void rtnl_cleanup(void)
+{
+       DBG("");
+
+       g_io_channel_shutdown(channel, TRUE, NULL);
+       g_io_channel_unref(channel);
+
+       channel = NULL;
+}
+
+static int ethernet_init(void)
+{
+       int err;
+
+       err = rtnl_init();
+       if (err < 0)
+               return err;
+
+       err = connman_driver_register(&ethernet_driver);
+       if (err < 0) {
+               rtnl_cleanup();
+               return err;
+       }
+
+       return 0;
+}
+
+static void ethernet_exit(void)
+{
+       connman_driver_unregister(&ethernet_driver);
+
+       rtnl_cleanup();
+}
+
+CONNMAN_PLUGIN_DEFINE("ethernet", "Ethernet interface plugin", VERSION,
+                                               ethernet_init, ethernet_exit)