*
* Connection Manager
*
- * Copyright (C) 2007-2009 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2012 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
#define CONNMAN_API_SUBJECT_TO_CHANGE
#include <connman/plugin.h>
+#include <connman/utsname.h>
#include <connman/log.h>
+#include <connman/inet.h>
-static GIOChannel *inotify_channel = NULL;
+static in_addr_t loopback_address;
+static in_addr_t loopback_netmask;
-static int hostname_descriptor = -1;
+static char system_hostname[HOST_NAME_MAX + 1];
-static gboolean inotify_event(GIOChannel *channel,
- GIOCondition condition, gpointer data)
+static void create_hostname(void)
{
- unsigned char buf[129], *ptr = buf;
- gsize len;
- GIOError err;
+ const char *name = "localhost";
- if (condition & (G_IO_HUP | G_IO_ERR))
- return FALSE;
-
- memset(buf, 0, sizeof(buf));
-
- err = g_io_channel_read(channel, (gchar *) buf, sizeof(buf) - 1, &len);
- if (err != G_IO_ERROR_NONE) {
- if (err == G_IO_ERROR_AGAIN)
- return TRUE;
- connman_error("Reading from inotify channel failed");
- return FALSE;
- }
-
- while (len >= sizeof(struct inotify_event)) {
- struct inotify_event *evt = (struct inotify_event *) ptr;
-
- if (evt->wd == hostname_descriptor) {
- if (evt->mask & (IN_CREATE | IN_MOVED_TO))
- connman_info("create hostname file");
-
- if (evt->mask & (IN_DELETE | IN_MOVED_FROM))
- connman_info("delete hostname file");
-
- if (evt->mask & (IN_MODIFY | IN_MOVE_SELF))
- connman_info("modify hostname file");
- }
+ if (sethostname(name, strlen(name)) < 0)
+ connman_error("Failed to set hostname to %s", name);
- len -= sizeof(struct inotify_event) + evt->len;
- ptr += sizeof(struct inotify_event) + evt->len;
- }
-
- return TRUE;
+ strncpy(system_hostname, name, HOST_NAME_MAX);
}
-static int create_watch(void)
+static int setup_hostname(void)
{
- int fd;
+ char name[HOST_NAME_MAX + 1];
- fd = inotify_init();
- if (fd < 0) {
- connman_error("Creation of inotify context failed");
- return -EIO;
- }
+ memset(system_hostname, 0, sizeof(system_hostname));
- inotify_channel = g_io_channel_unix_new(fd);
- if (inotify_channel == NULL) {
- connman_error("Creation of inotify channel failed");
- close(fd);
+ if (gethostname(system_hostname, HOST_NAME_MAX) < 0) {
+ connman_error("Failed to get current hostname");
return -EIO;
}
- g_io_add_watch(inotify_channel, G_IO_IN | G_IO_ERR | G_IO_HUP,
- inotify_event, NULL);
+ if (strlen(system_hostname) > 0 &&
+ strcmp(system_hostname, "(none)") != 0)
+ connman_info("System hostname is %s", system_hostname);
+ else
+ create_hostname();
+
+ memset(name, 0, sizeof(name));
- hostname_descriptor = inotify_add_watch(fd, "/etc/hostname",
- IN_MODIFY | IN_DELETE_SELF | IN_MOVE_SELF);
- if (hostname_descriptor < 0) {
- connman_error("Creation of hostname watch failed");
- g_io_channel_unref(inotify_channel);
- inotify_channel = NULL;
- close(fd);
+ if (getdomainname(name, HOST_NAME_MAX) < 0) {
+ connman_error("Failed to get current domainname");
return -EIO;
}
+ if (strlen(name) > 0 && strcmp(name, "(none)") != 0)
+ connman_info("System domainname is %s", name);
+
return 0;
}
-static void remove_watch(void)
+static gboolean valid_loopback(int sk, struct ifreq *ifr)
{
- int fd;
-
- if (inotify_channel == NULL)
- return;
-
- fd = g_io_channel_unix_get_fd(inotify_channel);
-
- if (hostname_descriptor >= 0)
- inotify_rm_watch(fd, hostname_descriptor);
-
- g_io_channel_unref(inotify_channel);
+ struct sockaddr_in *addr;
+ int err;
+ char buf[INET_ADDRSTRLEN];
- close(fd);
-}
+ /* It is possible to end up in situations in which the
+ * loopback interface is up but has no valid address. In that
+ * case, we expect EADDRNOTAVAIL and should return FALSE.
+ */
-static int setup_hostname(void)
-{
- char name[HOST_NAME_MAX + 1];
+ err = ioctl(sk, SIOCGIFADDR, ifr);
+ if (err < 0) {
+ err = -errno;
+ connman_error("Getting address failed (%s)", strerror(-err));
+ return err != -EADDRNOTAVAIL ? TRUE : FALSE;
+ }
- memset(name, 0, sizeof(name));
+ addr = (struct sockaddr_in *) &ifr->ifr_addr;
+ if (addr->sin_addr.s_addr != loopback_address) {
+ connman_warn("Invalid loopback address %s",
+ inet_ntop(AF_INET, &addr->sin_addr, buf, sizeof(buf)));
+ return FALSE;
+ }
- if (gethostname(name, HOST_NAME_MAX) < 0) {
- connman_error("Failed to get current hostname");
- return -EIO;
+ err = ioctl(sk, SIOCGIFNETMASK, ifr);
+ if (err < 0) {
+ err = -errno;
+ connman_error("Getting netmask failed (%s)", strerror(-err));
+ return TRUE;
}
- connman_info("System hostname is %s", name);
+ addr = (struct sockaddr_in *) &ifr->ifr_netmask;
+ if (addr->sin_addr.s_addr != loopback_netmask) {
+ connman_warn("Invalid loopback netmask %s",
+ inet_ntop(AF_INET, &addr->sin_addr, buf, sizeof(buf)));
+ return FALSE;
+ }
- return 0;
+ return TRUE;
}
static int setup_loopback(void)
{
struct ifreq ifr;
- struct sockaddr_in *addr;
+ struct sockaddr_in addr;
int sk, err;
- sk = socket(PF_INET, SOCK_DGRAM, 0);
+ sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (sk < 0)
- return -1;
+ return -errno;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, "lo");
}
if (ifr.ifr_flags & IFF_UP) {
- err = -EALREADY;
- connman_info("The loopback interface is already up");
- goto done;
+ connman_info("Checking loopback interface settings");
+ if (valid_loopback(sk, &ifr) == TRUE) {
+ err = -EALREADY;
+ goto done;
+ }
+
+ connman_warn("Correcting wrong lookback settings");
}
- addr = (struct sockaddr_in *) &ifr.ifr_addr;
- addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = inet_addr("127.0.0.1");
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = loopback_address;
+ memcpy(&ifr.ifr_addr, &addr, sizeof(ifr.ifr_addr));
err = ioctl(sk, SIOCSIFADDR, &ifr);
if (err < 0) {
goto done;
}
- addr = (struct sockaddr_in *) &ifr.ifr_netmask;
- addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = inet_addr("255.0.0.0");
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = loopback_netmask;
+ memcpy(&ifr.ifr_netmask, &addr, sizeof(ifr.ifr_netmask));
err = ioctl(sk, SIOCSIFNETMASK, &ifr);
if (err < 0) {
return err;
}
+static const char *loopback_get_hostname(void)
+{
+ return system_hostname;
+}
+
+static int loopback_set_hostname(const char *hostname)
+{
+ const char *ptr;
+ int err, len;
+
+ if (g_strcmp0(hostname, "<hostname>") == 0)
+ return 0;
+
+ len = strlen(hostname);
+
+ if (connman_inet_check_hostname(hostname, len) == FALSE)
+ return -EINVAL;
+
+ if ((ptr = strstr(hostname, ".")) != NULL)
+ len = ptr - hostname;
+
+ if (sethostname(hostname, len) < 0) {
+ err = -errno;
+ connman_error("Failed to set hostname to %s", hostname);
+ return err;
+ }
+
+ connman_info("Setting hostname to %s", hostname);
+
+ return 0;
+}
+
+static int loopback_set_domainname(const char *domainname)
+{
+ int err, len;
+
+ len = strlen(domainname);
+
+ if (connman_inet_check_hostname(domainname, len) == FALSE)
+ return -EINVAL;
+
+ if (setdomainname(domainname, len) < 0) {
+ err = -errno;
+ connman_error("Failed to set domainname to %s", domainname);
+ return err;
+ }
+
+ connman_info("Setting domainname to %s", domainname);
+
+ return 0;
+}
+
+static struct connman_utsname_driver loopback_driver = {
+ .name = "loopback",
+ .get_hostname = loopback_get_hostname,
+ .set_hostname = loopback_set_hostname,
+ .set_domainname = loopback_set_domainname,
+};
+
static int loopback_init(void)
{
+ loopback_address = inet_addr("127.0.0.1");
+ loopback_netmask = inet_addr("255.0.0.0");
+
setup_loopback();
setup_hostname();
- create_watch();
+ connman_utsname_driver_register(&loopback_driver);
return 0;
}
static void loopback_exit(void)
{
- remove_watch();
+ connman_utsname_driver_unregister(&loopback_driver);
}
CONNMAN_PLUGIN_DEFINE(loopback, "Loopback device plugin", VERSION,
projects / framework / connectivity / connman.git / blobdiff