gecko/dom/system/gonk/systemlibs.js

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/* Copyright 2012 Mozilla Foundation and Mozilla contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
if (!this.ctypes) {
// We're likely being loaded as a JSM.
this.EXPORTED_SYMBOLS = [ "libcutils", "libnetutils", "netHelpers" ];
Components.utils.import("resource://gre/modules/ctypes.jsm");
}
const SYSTEM_PROPERTY_KEY_MAX = 32;
const SYSTEM_PROPERTY_VALUE_MAX = 92;
// We leave this as 'undefined' instead of setting it to 'false'. That
// way a file that includes us can have it defined already without us
// overriding the value here.
let DEBUG;
/**
* Expose some system-level functions.
*/
this.libcutils = (function() {
let lib;
try {
lib = ctypes.open("libcutils.so");
} catch(ex) {
// Return a fallback option in case libcutils.so isn't present (e.g.
// when building Firefox with MOZ_B2G_RIL.
if (DEBUG) {
dump("Could not load libcutils.so. Using fake propdb.\n");
}
let fake_propdb = Object.create(null);
return {
property_get: function fake_property_get(key, defaultValue) {
if (key in fake_propdb) {
return fake_propdb[key];
}
return defaultValue === undefined ? null : defaultValue;
},
property_set: function fake_property_set(key, value) {
fake_propdb[key] = value;
}
};
}
let c_property_get = lib.declare("property_get", ctypes.default_abi,
ctypes.int, // return value: length
ctypes.char.ptr, // key
ctypes.char.ptr, // value
ctypes.char.ptr); // default
let c_property_set = lib.declare("property_set", ctypes.default_abi,
ctypes.int, // return value: success
ctypes.char.ptr, // key
ctypes.char.ptr); // value
let c_value_buf = ctypes.char.array(SYSTEM_PROPERTY_VALUE_MAX)();
return {
/**
* Get a system property.
*
* @param key
* Name of the property
* @param defaultValue [optional]
* Default value to return if the property isn't set (default: null)
*/
property_get: function property_get(key, defaultValue) {
if (defaultValue === undefined) {
defaultValue = null;
}
c_property_get(key, c_value_buf, defaultValue);
return c_value_buf.readString();
},
/**
* Set a system property
*
* @param key
* Name of the property
* @param value
* Value to set the property to.
*/
property_set: function property_set(key, value) {
let rv = c_property_set(key, value);
if (rv) {
throw Error('libcutils.property_set("' + key + '", "' + value +
'") failed with error ' + rv);
}
}
};
})();
/**
* Network-related functions from libnetutils.
*/
this.libnetutils = (function () {
let library;
try {
library = ctypes.open("libnetutils.so");
} catch(ex) {
if (DEBUG) {
dump("Could not load libnetutils.so!\n");
}
// For now we just fake the ctypes library interfacer to return
// no-op functions when library.declare() is called.
library = {
declare: function fake_declare() {
return function fake_libnetutils_function() {};
}
};
}
let iface = {
ifc_enable: library.declare("ifc_enable", ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
ifc_disable: library.declare("ifc_disable", ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
ifc_add_host_route: library.declare("ifc_add_host_route",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr,
ctypes.int),
ifc_remove_host_routes: library.declare("ifc_remove_host_routes",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
ifc_set_default_route: library.declare("ifc_set_default_route",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr,
ctypes.int),
ifc_get_default_route: library.declare("ifc_get_default_route",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
ifc_remove_default_route: library.declare("ifc_remove_default_route",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
ifc_configure: library.declare("ifc_configure", ctypes.default_abi,
ctypes.int,
ctypes.char.ptr,
ctypes.int,
ctypes.int,
ctypes.int,
ctypes.int,
ctypes.int),
ifc_add_route: library.declare("ifc_add_route", ctypes.default_abi,
ctypes.int, // return value
ctypes.char.ptr, // ifname
ctypes.char.ptr, // dst
ctypes.int, // prefix_length
ctypes.char.ptr), // gw
ifc_remove_route: library.declare("ifc_remove_route", ctypes.default_abi,
ctypes.int, // return value
ctypes.char.ptr, // ifname
ctypes.char.ptr, // dst
ctypes.int, // prefix_length
ctypes.char.ptr), // gw
dhcp_stop: library.declare("dhcp_stop", ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
dhcp_release_lease: library.declare("dhcp_release_lease", ctypes.default_abi,
ctypes.int,
ctypes.char.ptr),
dhcp_get_errmsg: library.declare("dhcp_get_errmsg", ctypes.default_abi,
ctypes.char.ptr),
// Constants for ifc_reset_connections.
// NOTE: Ignored in versions before ICS.
RESET_IPV4_ADDRESSES: 0x01,
RESET_IPV6_ADDRESSES: 0x02,
};
iface.RESET_ALL_ADDRESSES = iface.RESET_IPV4_ADDRESSES |
iface.RESET_IPV6_ADDRESSES
// dhcp_do_request's interface changed in SDK version 15. We try to hide
// this here by implementing the same JS API for both versions.
let sdkVersion = libcutils.property_get("ro.build.version.sdk") || "0";
sdkVersion = parseInt(sdkVersion, 10);
if (sdkVersion >= 15) {
let ipaddrbuf = ctypes.char.array(4096)();
let gatewaybuf = ctypes.char.array(4096)();
let prefixLen = ctypes.int();
let dns1buf = ctypes.char.array(4096)();
let dns2buf = ctypes.char.array(4096)();
let serverbuf = ctypes.char.array(4096)();
let lease = ctypes.int();
let c_dhcp_do_request =
library.declare("dhcp_do_request", ctypes.default_abi,
ctypes.int, // return value
ctypes.char.ptr, // ifname
ctypes.char.ptr, // ipaddr
ctypes.char.ptr, // gateway
ctypes.int.ptr, // prefixlen
ctypes.char.ptr, // dns1
ctypes.char.ptr, // dns2
ctypes.char.ptr, // server
ctypes.int.ptr); // lease
iface.dhcp_do_request = function dhcp_do_request(ifname) {
let ret = c_dhcp_do_request(ifname,
ipaddrbuf,
gatewaybuf,
prefixLen.address(),
dns1buf,
dns2buf,
serverbuf,
lease.address());
if (ret && DEBUG) {
let error = iface.dhcp_get_errmsg();
dump("dhcp_do_request failed - " + error.readString());
}
let obj = {
ret: ret | 0,
ipaddr_str: ipaddrbuf.readString(),
mask: netHelpers.makeMask(prefixLen.value),
gateway_str: gatewaybuf.readString(),
dns1_str: dns1buf.readString(),
dns2_str: dns2buf.readString(),
server_str: serverbuf.readString(),
lease: lease.value | 0
};
obj.ipaddr = netHelpers.stringToIP(obj.ipaddr_str);
obj.mask_str = netHelpers.ipToString(obj.mask);
obj.broadcast_str = netHelpers.ipToString((obj.ipaddr & obj.mask) + ~obj.mask);
obj.gateway = netHelpers.stringToIP(obj.gateway_str);
obj.dns1 = netHelpers.stringToIP(obj.dns1_str);
obj.dns2 = netHelpers.stringToIP(obj.dns2_str);
obj.server = netHelpers.stringToIP(obj.server_str);
return obj;
};
// dhcp_do_request_renew() went away in newer libnetutils.
iface.dhcp_do_request_renew = iface.dhcp_do_request;
// Same deal with ifc_reset_connections.
let c_ifc_reset_connections =
library.declare("ifc_reset_connections",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr,
ctypes.int);
iface.ifc_reset_connections = function(ifname, reset_mask) {
return c_ifc_reset_connections(ifname, reset_mask) | 0;
}
} else {
let ints = ctypes.int.array(8)();
let c_dhcp_do_request =
library.declare("dhcp_do_request", ctypes.default_abi,
ctypes.int, // return value
ctypes.char.ptr, // ifname
ctypes.int.ptr, // ipaddr
ctypes.int.ptr, // gateway
ctypes.int.ptr, // mask
ctypes.int.ptr, // dns1
ctypes.int.ptr, // dns2
ctypes.int.ptr, // server
ctypes.int.ptr); // lease
let c_dhcp_do_request_renew =
library.declare("dhcp_do_request_renew", ctypes.default_abi,
ctypes.int, // return value
ctypes.char.ptr, // ifname
ctypes.int.ptr, // ipaddr
ctypes.int.ptr, // gateway
ctypes.int.ptr, // mask
ctypes.int.ptr, // dns1
ctypes.int.ptr, // dns2
ctypes.int.ptr, // server
ctypes.int.ptr); // lease
let wrapCFunc = function wrapCFunc(c_fn) {
return function (ifname) {
let ret = c_fn(ifname,
ints.addressOfElement(0),
ints.addressOfElement(1),
ints.addressOfElement(2),
ints.addressOfElement(3),
ints.addressOfElement(4),
ints.addressOfElement(5),
ints.addressOfElement(6));
if (ret && DEBUG) {
let error = iface.dhcp_get_errmsg();
dump("dhcp_do_request_* failed - " + error.readString());
}
return {ret: ret | 0,
ipaddr: ints[0] | 0,
gateway: ints[1] | 0,
mask: ints[2] | 0,
dns1: ints[3] | 0,
dns2: ints[4] | 0,
server: ints[5] | 0,
lease: ints[6] | 0};
};
};
iface.dhcp_do_request = wrapCFunc(c_dhcp_do_request);
iface.dhcp_do_request_renew = wrapCFunc(c_dhcp_do_request_renew);
let c_ifc_reset_connections =
library.declare("ifc_reset_connections",
ctypes.default_abi,
ctypes.int,
ctypes.char.ptr);
iface.ifc_reset_connections = function(ifname, reset_mask) {
return c_ifc_reset_connections(ifname) | 0;
}
}
return iface;
})();
/**
* Helpers for conversions.
*/
this.netHelpers = {
/**
* Swap byte orders for 32-bit value
*/
swap32: function swap32(n) {
return (((n >> 24) & 0xFF) << 0) |
(((n >> 16) & 0xFF) << 8) |
(((n >> 8) & 0xFF) << 16) |
(((n >> 0) & 0xFF) << 24);
},
/**
* Convert network byte order to host byte order
* Note: Assume that the system is little endian
*/
ntohl: function ntohl(n) {
return this.swap32(n);
},
/**
* Convert host byte order to network byte order
* Note: Assume that the system is little endian
*/
htonl: function htonl(n) {
return this.swap32(n);
},
/**
* Convert integer representation of an IP address to the string
* representation.
*
* @param ip
* IP address in number format.
*/
ipToString: function ipToString(ip) {
return ((ip >> 0) & 0xFF) + "." +
((ip >> 8) & 0xFF) + "." +
((ip >> 16) & 0xFF) + "." +
((ip >> 24) & 0xFF);
},
/**
* Convert string representation of an IP address to the integer
* representation.
*
* @param string
* String containing the IP address.
*/
stringToIP: function stringToIP(string) {
let ip = 0;
let start, end = -1;
for (let i = 0; i < 4; i++) {
start = end + 1;
end = string.indexOf(".", start);
if (end == -1) {
end = string.length;
}
let num = parseInt(string.slice(start, end), 10);
if (isNaN(num)) {
return null;
}
ip |= num << (i * 8);
}
return ip;
},
/**
* Make a subnet mask.
*/
makeMask: function makeMask(len) {
let mask = 0;
for (let i = 0; i < len; ++i) {
mask |= (0x80000000 >> i);
}
return this.ntohl(mask);
}
};