X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=plugins%2Floopback.c;h=a111eeedd230b09bc2f4299b3354cf85b3880cd1;hb=04fbb74b4db232da8a59eb5c028cea48491ecab6;hp=782853efe44b5b2ce37ff2206c51baf2cce2cf8d;hpb=125de0a5c3a45182aa53dd7f0355621f8e823fad;p=framework%2Fconnectivity%2Fconnman.git diff --git a/plugins/loopback.c b/plugins/loopback.c index 782853e..a111eee 100644 --- a/plugins/loopback.c +++ b/plugins/loopback.c @@ -2,7 +2,7 @@ * * 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 @@ -37,104 +37,14 @@ #define CONNMAN_API_SUBJECT_TO_CHANGE #include +#include #include +#include -#if 0 -static GIOChannel *inotify_channel = NULL; +static in_addr_t loopback_address; +static in_addr_t loopback_netmask; -static int hostname_descriptor = -1; - -static gboolean inotify_event(GIOChannel *channel, - GIOCondition condition, gpointer data) -{ - unsigned char buf[129], *ptr = buf; - gsize len; - GIOError err; - - 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"); - } - - len -= sizeof(struct inotify_event) + evt->len; - ptr += sizeof(struct inotify_event) + evt->len; - } - - return TRUE; -} - -static int create_watch(void) -{ - int fd; - - fd = inotify_init(); - if (fd < 0) { - connman_error("Creation of inotify context failed"); - return -EIO; - } - - inotify_channel = g_io_channel_unix_new(fd); - if (inotify_channel == NULL) { - connman_error("Creation of inotify channel failed"); - close(fd); - return -EIO; - } - - 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); - return -EIO; - } - - g_io_add_watch(inotify_channel, G_IO_IN | G_IO_ERR | G_IO_HUP, - inotify_event, NULL); - - return 0; -} - -static void remove_watch(void) -{ - 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); - - close(fd); -} -#endif +static char system_hostname[HOST_NAME_MAX + 1]; static void create_hostname(void) { @@ -142,21 +52,24 @@ static void create_hostname(void) if (sethostname(name, strlen(name)) < 0) connman_error("Failed to set hostname to %s", name); + + strncpy(system_hostname, name, HOST_NAME_MAX); } static int setup_hostname(void) { char name[HOST_NAME_MAX + 1]; - memset(name, 0, sizeof(name)); + memset(system_hostname, 0, sizeof(system_hostname)); - if (gethostname(name, HOST_NAME_MAX) < 0) { + if (gethostname(system_hostname, HOST_NAME_MAX) < 0) { connman_error("Failed to get current hostname"); return -EIO; } - if (strlen(name) > 0 && strcmp(name, "(none)") != 0) - connman_info("System hostname is %s", name); + if (strlen(system_hostname) > 0 && + strcmp(system_hostname, "(none)") != 0) + connman_info("System hostname is %s", system_hostname); else create_hostname(); @@ -173,15 +86,57 @@ static int setup_hostname(void) return 0; } +static gboolean valid_loopback(int sk, struct ifreq *ifr) +{ + struct sockaddr_in *addr; + int err; + char buf[INET_ADDRSTRLEN]; + + /* 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. + */ + + err = ioctl(sk, SIOCGIFADDR, ifr); + if (err < 0) { + err = -errno; + connman_error("Getting address failed (%s)", strerror(-err)); + return err != -EADDRNOTAVAIL ? TRUE : FALSE; + } + + 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; + } + + err = ioctl(sk, SIOCGIFNETMASK, ifr); + if (err < 0) { + err = -errno; + connman_error("Getting netmask failed (%s)", strerror(-err)); + return TRUE; + } + + 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 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"); @@ -192,14 +147,19 @@ static int setup_loopback(void) } 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) { @@ -208,9 +168,10 @@ static int setup_loopback(void) 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) { @@ -239,20 +200,82 @@ done: 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, "") == 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,