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Abstract and Android sockets for global ctrl_iface

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The wpa_supplicant global control interface parameter can now be used to
explicitly specify an abstract UNIX domain socket (Linux specific
extension) with "@abstract:" prefix and an Android control socket with
"@android:" prefix.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-05-18 11:42:09 +03:00
parent 6fd5ceaf70
commit d2a9e2c76d
2 changed files with 88 additions and 26 deletions
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37
src/common/wpa_ctrl.c
View file

@ -82,6 +82,9 @@ struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path)
int tries = 0;
int flags;
if (ctrl_path == NULL)
return NULL;
ctrl = os_malloc(sizeof(*ctrl));
if (ctrl == NULL)
return NULL;
@ -126,13 +129,27 @@ try_again:
#ifdef ANDROID
chmod(ctrl->local.sun_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
chown(ctrl->local.sun_path, AID_SYSTEM, AID_WIFI);
if (os_strncmp(ctrl_path, "@android:", 9) == 0) {
if (socket_local_client_connect(
ctrl->s, ctrl_path + 9,
ANDROID_SOCKET_NAMESPACE_RESERVED,
SOCK_DGRAM) < 0) {
close(ctrl->s);
unlink(ctrl->local.sun_path);
os_free(ctrl);
return NULL;
}
return ctrl;
}
/*
* If the ctrl_path isn't an absolute pathname, assume that
* it's the name of a socket in the Android reserved namespace.
* Otherwise, it's a normal UNIX domain socket appearing in the
* filesystem.
*/
if (ctrl_path != NULL && *ctrl_path != '/') {
if (*ctrl_path != '/') {
char buf[21];
os_snprintf(buf, sizeof(buf), "wpa_%s", ctrl_path);
if (socket_local_client_connect(
@ -149,12 +166,18 @@ try_again:
#endif /* ANDROID */
ctrl->dest.sun_family = AF_UNIX;
res = os_strlcpy(ctrl->dest.sun_path, ctrl_path,
sizeof(ctrl->dest.sun_path));
if (res >= sizeof(ctrl->dest.sun_path)) {
close(ctrl->s);
os_free(ctrl);
return NULL;
if (os_strncmp(ctrl_path, "@abstract:", 10) == 0) {
ctrl->dest.sun_path[0] = '\0';
os_strlcpy(ctrl->dest.sun_path + 1, ctrl_path + 10,
sizeof(ctrl->dest.sun_path) - 1);
} else {
res = os_strlcpy(ctrl->dest.sun_path, ctrl_path,
sizeof(ctrl->dest.sun_path));
if (res >= sizeof(ctrl->dest.sun_path)) {
close(ctrl->s);
os_free(ctrl);
return NULL;
}
}
if (connect(ctrl->s, (struct sockaddr *) &ctrl->dest,
sizeof(ctrl->dest)) < 0) {

77
wpa_supplicant/ctrl_iface_unix.c
View file

@ -667,6 +667,7 @@ wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
{
struct ctrl_iface_global_priv *priv;
struct sockaddr_un addr;
const char *ctrl = global->params.ctrl_interface;
priv = os_zalloc(sizeof(*priv));
if (priv == NULL)
@ -674,17 +675,39 @@ wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
priv->global = global;
priv->sock = -1;
if (global->params.ctrl_interface == NULL)
if (ctrl == NULL)
return priv;
#ifdef ANDROID
priv->sock = android_get_control_socket(global->params.ctrl_interface);
if (priv->sock >= 0)
goto havesock;
#endif /* ANDROID */
wpa_printf(MSG_DEBUG, "Global control interface '%s'", ctrl);
wpa_printf(MSG_DEBUG, "Global control interface '%s'",
global->params.ctrl_interface);
#ifdef ANDROID
if (os_strncmp(ctrl, "@android:", 9) == 0) {
priv->sock = android_get_control_socket(ctrl + 9);
if (priv->sock < 0) {
wpa_printf(MSG_ERROR, "Failed to open Android control "
"socket '%s'", ctrl + 9);
goto fail;
}
wpa_printf(MSG_DEBUG, "Using Android control socket '%s'",
ctrl + 9);
goto havesock;
}
if (os_strncmp(ctrl, "@abstract:", 10) != 0) {
/*
* Backwards compatibility - try to open an Android control
* socket and if that fails, assume this was a UNIX domain
* socket instead.
*/
priv->sock = android_get_control_socket(ctrl);
if (priv->sock >= 0) {
wpa_printf(MSG_DEBUG,
"Using Android control socket '%s'",
ctrl);
goto havesock;
}
}
#endif /* ANDROID */
priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);
if (priv->sock < 0) {
@ -697,8 +720,23 @@ wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
addr.sun_len = sizeof(addr);
#endif /* __FreeBSD__ */
addr.sun_family = AF_UNIX;
os_strlcpy(addr.sun_path, global->params.ctrl_interface,
sizeof(addr.sun_path));
if (os_strncmp(ctrl, "@abstract:", 10) == 0) {
addr.sun_path[0] = '\0';
os_strlcpy(addr.sun_path + 1, ctrl + 10,
sizeof(addr.sun_path) - 1);
if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) <
0) {
wpa_printf(MSG_ERROR, "supp-global-ctrl-iface-init: "
"bind(PF_UNIX) failed: %s", strerror(errno));
goto fail;
}
wpa_printf(MSG_DEBUG, "Using Abstract control socket '%s'",
ctrl + 10);
goto havesock;
}
os_strlcpy(addr.sun_path, ctrl, sizeof(addr.sun_path));
if (bind(priv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("supp-global-ctrl-iface-init (will try fixup): "
"bind(PF_UNIX)");
@ -707,11 +745,11 @@ wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
" allow connections - assuming it was left"
"over from forced program termination");
if (unlink(global->params.ctrl_interface) < 0) {
if (unlink(ctrl) < 0) {
perror("unlink[ctrl_iface]");
wpa_printf(MSG_ERROR, "Could not unlink "
"existing ctrl_iface socket '%s'",
global->params.ctrl_interface);
ctrl);
goto fail;
}
if (bind(priv->sock, (struct sockaddr *) &addr,
@ -721,17 +759,19 @@ wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
}
wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
"ctrl_iface socket '%s'",
global->params.ctrl_interface);
ctrl);
} else {
wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
"be in use - cannot override it");
wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
"not used anymore",
global->params.ctrl_interface);
ctrl);
goto fail;
}
}
wpa_printf(MSG_DEBUG, "Using UNIX control socket '%s'", ctrl);
if (global->params.ctrl_interface_group) {
char *gid_str = global->params.ctrl_interface_group;
gid_t gid = 0;
@ -755,21 +795,20 @@ wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
wpa_printf(MSG_DEBUG, "ctrl_interface_group=%d",
(int) gid);
}
if (chown(global->params.ctrl_interface, -1, gid) < 0) {
if (chown(ctrl, -1, gid) < 0) {
perror("chown[global_ctrl_interface/ifname]");
goto fail;
}
if (chmod(global->params.ctrl_interface, S_IRWXU | S_IRWXG) < 0)
{
if (chmod(ctrl, S_IRWXU | S_IRWXG) < 0) {
perror("chmod[global_ctrl_interface/ifname]");
goto fail;
}
} else {
chmod(ctrl, S_IRWXU);
}
#ifdef ANDROID
havesock:
#endif /* ANDROID */
eloop_register_read_sock(priv->sock,
wpa_supplicant_global_ctrl_iface_receive,
global, NULL);