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libusbmuxd.c
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libusbmuxd.c
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/*
* libusbmuxd.c
*
* Copyright (C) 2009-2019 Nikias Bassen <nikias@gmx.li>
* Copyright (C) 2009-2014 Martin Szulecki <m.szulecki@libimobiledevice.org>
* Copyright (C) 2009 Paul Sladen <libiphone@paul.sladen.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#ifdef LIBUSBMUXD_STATIC
#define USBMUXD_API
#elif defined(_WIN32)
#define USBMUXD_API __declspec( dllexport )
#else
#if __GNUC__ >= 4
#define USBMUXD_API __attribute__((visibility("default")))
#else
#define USBMUXD_API
#endif
#endif
#ifndef EPROTO
#define EPROTO 134
#endif
#ifndef EBADMSG
#define EBADMSG 104
#endif
#ifndef ECONNREFUSED
#define ECONNREFUSED 107
#endif
#include <unistd.h>
#include <signal.h>
#ifdef WIN32
#include <winsock2.h>
#include <windows.h>
#ifndef HAVE_SLEEP
#define sleep(x) Sleep(x*1000)
#endif
#else
#include <sys/socket.h>
#include <arpa/inet.h>
#if defined(HAVE_PROGRAM_INVOCATION_SHORT_NAME) && !defined(HAVE_PROGRAM_INVOCATION_SHORT_NAME_ERRNO_H)
extern char *program_invocation_short_name;
#endif
#ifdef __APPLE__
extern int _NSGetExecutablePath(char* buf, uint32_t* bufsize);
#include <sys/stat.h>
#endif
#endif
#ifdef HAVE_INOTIFY
#include <sys/inotify.h>
#include <sys/select.h>
#include <pthread.h>
#define EVENT_SIZE (sizeof (struct inotify_event))
#define EVENT_BUF_LEN (1024 * (EVENT_SIZE + 16))
#define USBMUXD_DIRNAME "/var/run"
#define USBMUXD_SOCKET_NAME "usbmuxd"
static int use_inotify = 1;
#endif /* HAVE_INOTIFY */
#ifndef HAVE_STPNCPY
static char* stpncpy(char *dst, const char *src, size_t len)
{
size_t n = strlen(src);
if (n > len)
n = len;
return strncpy(dst, src, len) + n;
}
#endif
#include <plist/plist.h>
#define PLIST_CLIENT_VERSION_STRING PACKAGE_STRING
#define PLIST_LIBUSBMUX_VERSION 3
static char *bundle_id = NULL;
static char *prog_name = NULL;
// usbmuxd public interface
#include "usbmuxd.h"
// usbmuxd protocol
#include "usbmuxd-proto.h"
// socket utility functions
#include <libimobiledevice-glue/socket.h>
// misc utility functions
#include <libimobiledevice-glue/collection.h>
// threads
#include <libimobiledevice-glue/thread.h>
static int libusbmuxd_debug = 0;
#ifndef PACKAGE
#define PACKAGE "libusbmuxd"
#endif
#define LIBUSBMUXD_DEBUG(level, format, ...) if (level <= libusbmuxd_debug) fprintf(stderr, ("[" PACKAGE "] " format), __VA_ARGS__); fflush(stderr);
#define LIBUSBMUXD_ERROR(format, ...) LIBUSBMUXD_DEBUG(0, format, __VA_ARGS__)
static struct collection devices;
static THREAD_T devmon = THREAD_T_NULL;
static int listenfd = -1;
static int running = 0;
static int cancelling = 0;
static volatile int use_tag = 0;
static volatile int proto_version = 1;
static volatile int try_list_devices = 1;
struct usbmuxd_subscription_context {
usbmuxd_event_cb_t callback;
void *user_data;
};
static struct usbmuxd_subscription_context *event_ctx = NULL;
static struct collection listeners;
thread_once_t listener_init_once = THREAD_ONCE_INIT;
mutex_t listener_mutex;
/**
* Finds a device info record by its handle.
* if the record is not found, NULL is returned.
*/
static usbmuxd_device_info_t *devices_find(uint32_t handle)
{
FOREACH(usbmuxd_device_info_t *dev, &devices) {
if (dev && dev->handle == handle) {
return dev;
}
} ENDFOREACH
return NULL;
}
/**
* Creates a socket connection to usbmuxd.
* For Mac/Linux it is a unix domain socket,
* for Windows it is a tcp socket.
*/
static int connect_usbmuxd_socket()
{
int res = -1;
char *usbmuxd_socket_addr = getenv("USBMUXD_SOCKET_ADDRESS");
if (usbmuxd_socket_addr) {
if (strncmp(usbmuxd_socket_addr, "UNIX:", 5) == 0) {
#if defined(WIN32) || defined(__CYGWIN__)
/* not supported, ignore */
#else
if (usbmuxd_socket_addr[5] != '\0') {
res = socket_connect_unix(usbmuxd_socket_addr+5);
if (res < 0) {
res = -errno;
}
return res;
}
#endif
} else {
uint16_t port = 0;
char *p = strrchr(usbmuxd_socket_addr, ':');
if (p) {
char *endp = NULL;
long l_port = strtol(p+1, &endp, 10);
if (endp && *endp == '\0') {
if (l_port > 0 && l_port < 65536) {
port = (uint16_t)l_port;
}
}
}
if (p && port > 0) {
char *connect_addr = NULL;
if (usbmuxd_socket_addr[0] == '[') {
connect_addr = strdup(usbmuxd_socket_addr+1);
connect_addr[p - usbmuxd_socket_addr - 1] = '\0';
p = strrchr(connect_addr, ']');
if (p) {
*p = '\0';
}
} else {
connect_addr = strdup(usbmuxd_socket_addr);
connect_addr[p - usbmuxd_socket_addr] = '\0';
}
if (connect_addr && *connect_addr != '\0') {
res = socket_connect(connect_addr, port);
#ifdef HAVE_INOTIFY
use_inotify = 0;
#endif
free(connect_addr);
if (res < 0) {
res = -errno;
}
return res;
}
free(connect_addr);
}
}
}
#if defined(WIN32) || defined(__CYGWIN__)
res = socket_connect("127.0.0.1", USBMUXD_SOCKET_PORT);
#else
res = socket_connect_unix(USBMUXD_SOCKET_FILE);
#endif
if (res < 0) {
res = -errno;
}
return res;
}
static void sanitize_udid(usbmuxd_device_info_t *devinfo)
{
if (!devinfo)
return;
if (strlen(devinfo->udid) == 24) {
memmove(&devinfo->udid[9], &devinfo->udid[8], 17);
devinfo->udid[8] = '-';
}
if (strcasecmp(devinfo->udid, "ffffffffffffffffffffffffffffffffffffffff") == 0) {
sprintf(devinfo->udid + 32, "%08x", devinfo->handle);
}
}
static usbmuxd_device_info_t *device_info_from_plist(plist_t props)
{
usbmuxd_device_info_t* devinfo = NULL;
plist_t n = NULL;
uint64_t val = 0;
char *strval = NULL;
devinfo = (usbmuxd_device_info_t*)malloc(sizeof(usbmuxd_device_info_t));
if (!devinfo)
return NULL;
memset(devinfo, 0, sizeof(usbmuxd_device_info_t));
n = plist_dict_get_item(props, "DeviceID");
if (n && plist_get_node_type(n) == PLIST_UINT) {
plist_get_uint_val(n, &val);
devinfo->handle = (uint32_t)val;
}
n = plist_dict_get_item(props, "ProductID");
if (n && plist_get_node_type(n) == PLIST_UINT) {
plist_get_uint_val(n, &val);
devinfo->product_id = (uint32_t)val;
}
n = plist_dict_get_item(props, "SerialNumber");
if (n && plist_get_node_type(n) == PLIST_STRING) {
plist_get_string_val(n, &strval);
if (strval) {
char *t = stpncpy(devinfo->udid, strval, sizeof(devinfo->udid)-1);
*t = '\0';
sanitize_udid(devinfo);
free(strval);
}
}
n = plist_dict_get_item(props, "ConnectionType");
if (n && plist_get_node_type(n) == PLIST_STRING) {
plist_get_string_val(n, &strval);
if (strval) {
if (strcmp(strval, "USB") == 0) {
devinfo->conn_type = CONNECTION_TYPE_USB;
} else if (strcmp(strval, "Network") == 0) {
devinfo->conn_type = CONNECTION_TYPE_NETWORK;
n = plist_dict_get_item(props, "NetworkAddress");
if (n && plist_get_node_type(n) == PLIST_DATA) {
uint64_t addr_len = 0;
const char *netaddr = plist_get_data_ptr(n, &addr_len);
if (netaddr && addr_len > 0 && addr_len < sizeof(devinfo->conn_data)) {
memcpy(devinfo->conn_data, netaddr, addr_len);
}
}
} else {
LIBUSBMUXD_ERROR("%s: Unexpected ConnectionType '%s'\n", __func__, strval);
}
free(strval);
}
}
if (!devinfo->udid[0]) {
LIBUSBMUXD_ERROR("%s: Failed to get SerialNumber (UDID)!\n", __func__);
free(devinfo);
return NULL;
}
if (!devinfo->conn_type) {
LIBUSBMUXD_ERROR("%s: Failed to get ConnectionType!\n", __func__);
free(devinfo);
devinfo = NULL;
} else if (devinfo->conn_type == CONNECTION_TYPE_NETWORK && !devinfo->conn_data[0]) {
LIBUSBMUXD_ERROR("%s: Failed to get EscapedFullServiceName!\n", __func__);
free(devinfo);
devinfo = NULL;
}
return devinfo;
}
static usbmuxd_device_info_t *device_info_from_device_record(struct usbmuxd_device_record *dev)
{
if (!dev) {
return NULL;
}
usbmuxd_device_info_t *devinfo = (usbmuxd_device_info_t*)malloc(sizeof(usbmuxd_device_info_t));
if (!devinfo) {
LIBUSBMUXD_ERROR("%s: Out of memory while allocating device info object\n", __func__);
return NULL;
}
devinfo->handle = dev->device_id;
devinfo->product_id = dev->product_id;
char *t = stpncpy(devinfo->udid, dev->serial_number, sizeof(devinfo->udid)-2);
*t = '\0';
sanitize_udid(devinfo);
return devinfo;
}
static int receive_packet(int sfd, struct usbmuxd_header *header, void **payload, int timeout)
{
int recv_len;
struct usbmuxd_header hdr;
char *payload_loc = NULL;
header->length = 0;
header->version = 0;
header->message = 0;
header->tag = 0;
recv_len = socket_receive_timeout(sfd, &hdr, sizeof(hdr), 0, timeout);
if (recv_len < 0) {
if (!cancelling) {
LIBUSBMUXD_DEBUG(1, "%s: Error receiving packet: %s\n", __func__, strerror(-recv_len));
}
return recv_len;
}
if ((size_t)recv_len < sizeof(hdr)) {
LIBUSBMUXD_DEBUG(1, "%s: Received packet is too small, got %d bytes!\n", __func__, recv_len);
return recv_len;
}
uint32_t payload_size = hdr.length - sizeof(hdr);
if (payload_size > 0) {
payload_loc = (char*)malloc(payload_size);
uint32_t rsize = 0;
do {
int res = socket_receive_timeout(sfd, payload_loc + rsize, payload_size - rsize, 0, 5000);
if (res < 0) {
break;
}
rsize += res;
} while (rsize < payload_size);
if (rsize != payload_size) {
LIBUSBMUXD_DEBUG(1, "%s: Error receiving payload of size %d (bytes received: %d)\n", __func__, payload_size, rsize);
free(payload_loc);
return -EBADMSG;
}
}
if (hdr.message == MESSAGE_PLIST) {
char *message = NULL;
plist_t plist = NULL;
plist_from_xml(payload_loc, payload_size, &plist);
free(payload_loc);
if (!plist) {
LIBUSBMUXD_DEBUG(1, "%s: Error getting plist from payload!\n", __func__);
return -EBADMSG;
}
plist_t node = plist_dict_get_item(plist, "MessageType");
if (!node || plist_get_node_type(node) != PLIST_STRING) {
*payload = plist;
hdr.length = sizeof(hdr);
memcpy(header, &hdr, sizeof(hdr));
return hdr.length;
}
plist_get_string_val(node, &message);
if (message) {
uint64_t val = 0;
if (strcmp(message, "Result") == 0) {
/* result message */
uint32_t dwval = 0;
plist_t n = plist_dict_get_item(plist, "Number");
plist_get_uint_val(n, &val);
*payload = malloc(sizeof(uint32_t));
dwval = val;
memcpy(*payload, &dwval, sizeof(dwval));
hdr.length = sizeof(hdr) + sizeof(dwval);
hdr.message = MESSAGE_RESULT;
} else if (strcmp(message, "Attached") == 0) {
/* device add message */
usbmuxd_device_info_t *devinfo = NULL;
plist_t props = plist_dict_get_item(plist, "Properties");
if (!props) {
LIBUSBMUXD_DEBUG(1, "%s: Could not get properties for message '%s' from plist!\n", __func__, message);
free(message);
plist_free(plist);
return -EBADMSG;
}
devinfo = device_info_from_plist(props);
if (!devinfo) {
LIBUSBMUXD_DEBUG(1, "%s: Could not create device info object from properties!\n", __func__);
free(message);
plist_free(plist);
return -EBADMSG;
}
*payload = (void*)devinfo;
hdr.length = sizeof(hdr) + sizeof(usbmuxd_device_info_t);
hdr.message = MESSAGE_DEVICE_ADD;
} else if (strcmp(message, "Detached") == 0) {
/* device remove message */
uint32_t dwval = 0;
plist_t n = plist_dict_get_item(plist, "DeviceID");
if (n) {
plist_get_uint_val(n, &val);
*payload = malloc(sizeof(uint32_t));
dwval = val;
memcpy(*payload, &dwval, sizeof(dwval));
hdr.length = sizeof(hdr) + sizeof(dwval);
hdr.message = MESSAGE_DEVICE_REMOVE;
}
} else if (strcmp(message, "Paired") == 0) {
/* device pair message */
uint32_t dwval = 0;
plist_t n = plist_dict_get_item(plist, "DeviceID");
if (n) {
plist_get_uint_val(n, &val);
*payload = malloc(sizeof(uint32_t));
dwval = val;
memcpy(*payload, &dwval, sizeof(dwval));
hdr.length = sizeof(hdr) + sizeof(dwval);
hdr.message = MESSAGE_DEVICE_PAIRED;
}
} else {
char *xml = NULL;
uint32_t len = 0;
plist_to_xml(plist, &xml, &len);
LIBUSBMUXD_DEBUG(1, "%s: Unexpected message '%s' in plist:\n%s\n", __func__, message, xml);
free(xml);
free(message);
plist_free(plist);
return -EBADMSG;
}
free(message);
}
plist_free(plist);
} else if (hdr.message == MESSAGE_DEVICE_ADD) {
usbmuxd_device_info_t *devinfo = device_info_from_device_record((struct usbmuxd_device_record*)payload_loc);
free(payload_loc);
*payload = devinfo;
} else {
*payload = payload_loc;
}
memcpy(header, &hdr, sizeof(hdr));
return hdr.length;
}
/**
* Retrieves the result code to a previously sent request.
*/
static int usbmuxd_get_result(int sfd, uint32_t tag, uint32_t *result, void **result_plist)
{
struct usbmuxd_header hdr;
int recv_len;
uint32_t *res = NULL;
if (!result) {
return -EINVAL;
}
*result = -1;
if (result_plist) {
*result_plist = NULL;
}
recv_len = receive_packet(sfd, &hdr, (void**)&res, 5000);
if (recv_len < 0 || (size_t)recv_len < sizeof(hdr)) {
free(res);
return (recv_len < 0 ? recv_len : -EPROTO);
}
if (hdr.message == MESSAGE_RESULT) {
int ret = 0;
if (hdr.tag != tag) {
LIBUSBMUXD_DEBUG(1, "%s: WARNING: tag mismatch (%d != %d). Proceeding anyway.\n", __func__, hdr.tag, tag);
}
if (res) {
memcpy(result, res, sizeof(uint32_t));
ret = 1;
}
free(res);
return ret;
}
if (hdr.message == MESSAGE_PLIST) {
if (!result_plist) {
LIBUSBMUXD_DEBUG(1, "%s: MESSAGE_PLIST result but result_plist pointer is NULL!\n", __func__);
return -1;
}
*result_plist = (plist_t)res;
*result = RESULT_OK;
return 1;
}
LIBUSBMUXD_DEBUG(1, "%s: Unexpected message of type %d received!\n", __func__, hdr.message);
free(res);
return -EPROTO;
}
static int send_packet(int sfd, uint32_t message, uint32_t tag, void *payload, uint32_t payload_size)
{
struct usbmuxd_header header;
header.length = sizeof(struct usbmuxd_header);
header.version = proto_version;
header.message = message;
header.tag = tag;
if (payload && (payload_size > 0)) {
header.length += payload_size;
}
int sent = socket_send(sfd, &header, sizeof(header));
if (sent != sizeof(header)) {
LIBUSBMUXD_DEBUG(1, "%s: ERROR: could not send packet header\n", __func__);
return -1;
}
if (payload && (payload_size > 0)) {
uint32_t ssize = 0;
do {
int res = socket_send(sfd, (char*)payload + ssize, payload_size - ssize);
if (res < 0) {
break;
}
ssize += res;
} while (ssize < payload_size);
sent += ssize;
}
if (sent != (int)header.length) {
LIBUSBMUXD_DEBUG(1, "%s: ERROR: could not send whole packet (sent %d of %d)\n", __func__, sent, header.length);
socket_close(sfd);
return -1;
}
return sent;
}
static int send_plist_packet(int sfd, uint32_t tag, plist_t message)
{
int res;
char *payload = NULL;
uint32_t payload_size = 0;
plist_to_xml(message, &payload, &payload_size);
res = send_packet(sfd, MESSAGE_PLIST, tag, payload, payload_size);
free(payload);
return res;
}
static void get_bundle_id()
{
#if defined (__APPLE__)
char CONTENTS_INFO_PLIST[] = "Contents/Info.plist";
char* execpath = malloc(1024);
uint32_t size = 1024;
if (_NSGetExecutablePath(execpath, &size) != 0) {
free(execpath);
return;
}
// strip off executable name
char *p = execpath + strlen(execpath) - 1;
while (p > execpath && *p != '/') p--;
if (*p == '/') *p = '\0';
// now walk back trying to find "/Contents/MacOS", and strip it off
int macos_found = 0;
while (p > execpath) {
p--;
if (*p != '/') continue;
if (strcmp(p, "/.") == 0) {
*p = '\0';
} else if (!macos_found && strcmp(p, "/MacOS") == 0) {
*p = '\0';
macos_found++;
} else if (macos_found && strcmp(p, "/Contents") == 0) {
*p = '\0';
break;
} else {
break;
}
}
// now just append "/Contents/Info.plist"
size_t len = strlen(execpath) + sizeof(CONTENTS_INFO_PLIST) + 1;
char *infopl = malloc(len);
snprintf(infopl, len, "%s/%s", execpath, CONTENTS_INFO_PLIST);
free(execpath);
struct stat fst;
fst.st_size = 0;
if (stat(infopl, &fst) != 0) {
free(infopl);
return;
}
size_t fsize = fst.st_size;
if (fsize < 8) {
free(infopl);
return;
}
FILE *f = fopen(infopl, "r");
free(infopl);
if (!f)
return;
char *buf = malloc(fsize);
if (!buf)
return;
if (fread(buf, 1, fsize, f) == fsize) {
plist_t pl = NULL;
if (memcmp(buf, "bplist00", 8) == 0) {
plist_from_bin(buf, fst.st_size, &pl);
} else {
plist_from_xml(buf, fst.st_size, &pl);
}
if (pl) {
plist_t bid = plist_dict_get_item(pl, "CFBundleIdentifier");
if (plist_get_node_type(bid) == PLIST_STRING) {
plist_get_string_val(bid, &bundle_id);
}
plist_free(pl);
}
}
free(buf);
fclose(f);
#endif
}
static void get_prog_name()
{
#if defined(__APPLE__) || defined(__FreeBSD__)
const char *pname = getprogname();
if (pname) {
prog_name = strdup(pname);
}
#elif defined (WIN32)
TCHAR *_pname = malloc((MAX_PATH+1) * sizeof(TCHAR));
if (GetModuleFileName(NULL, _pname, MAX_PATH+1) > 0) {
char* pname = NULL;
#if defined(UNICODE) || defined(_UNICODE)
char* __pname = NULL;
int l = WideCharToMultiByte(CP_UTF8, 0, _pname, -1, NULL, 0, NULL, NULL);
if (l > 0) {
__pname = malloc(l);
if (WideCharToMultiByte(CP_UTF8, 0, _pname, -1, __pname, l, NULL, NULL) > 0) {
pname = __pname;
}
}
#else
pname = _pname;
#endif
if (pname) {
char *p = pname+strlen(pname)-1;
while (p > pname && *p != '\\' && *p != '/') p--;
if (*p == '\\' || *p == '/') p++;
prog_name = strdup(p);
}
#if defined(UNICODE) || defined(_UNICODE)
free(__pname);
#endif
}
free(_pname);
#elif defined (HAVE_PROGRAM_INVOCATION_SHORT_NAME)
char *pname = program_invocation_short_name;
if (pname) {
prog_name = strdup(pname);
}
#elif defined (__linux__)
FILE *f = fopen("/proc/self/stat", "r");
if (!f) {
return;
}
char *tmpbuf = malloc(512);
size_t r = fread(tmpbuf, 1, 512, f);
if (r > 0) {
char *p = tmpbuf;
while (((size_t)(p-tmpbuf) < r) && (*p != '(') && (*p != '\0')) p++;
if (*p == '(') {
p++;
char *pname = p;
while (((size_t)(p-tmpbuf) < r) && (*p != ')') && (*p != '\0')) p++;
if (*p == ')') {
*p = '\0';
prog_name = strdup(pname);
}
}
}
free(tmpbuf);
fclose(f);
#else
#warning FIXME: no method to determine program name
#endif
}
static plist_t create_plist_message(const char* message_type)
{
if (!bundle_id) {
get_bundle_id();
}
if (!prog_name) {
get_prog_name();
}
plist_t plist = plist_new_dict();
if (bundle_id) {
plist_dict_set_item(plist, "BundleID", plist_new_string(bundle_id));
}
plist_dict_set_item(plist, "ClientVersionString", plist_new_string(PLIST_CLIENT_VERSION_STRING));
plist_dict_set_item(plist, "MessageType", plist_new_string(message_type));
if (prog_name) {
plist_dict_set_item(plist, "ProgName", plist_new_string(prog_name));
}
plist_dict_set_item(plist, "kLibUSBMuxVersion", plist_new_uint(PLIST_LIBUSBMUX_VERSION));
return plist;
}
static int send_listen_packet(int sfd, uint32_t tag)
{
int res = 0;
if (proto_version == 1) {
/* construct message plist */
plist_t plist = create_plist_message("Listen");
res = send_plist_packet(sfd, tag, plist);
plist_free(plist);
} else {
/* binary packet */
res = send_packet(sfd, MESSAGE_LISTEN, tag, NULL, 0);
}
return res;
}
static int send_connect_packet(int sfd, uint32_t tag, uint32_t device_id, uint16_t port)
{
int res = 0;
if (proto_version == 1) {
/* construct message plist */
plist_t plist = create_plist_message("Connect");
plist_dict_set_item(plist, "DeviceID", plist_new_uint(device_id));
plist_dict_set_item(plist, "PortNumber", plist_new_uint(htons(port)));
res = send_plist_packet(sfd, tag, plist);
plist_free(plist);
} else {
/* binary packet */
struct {
uint32_t device_id;
uint16_t port;
uint16_t reserved;
} conninfo;
conninfo.device_id = device_id;
conninfo.port = htons(port);
conninfo.reserved = 0;
res = send_packet(sfd, MESSAGE_CONNECT, tag, &conninfo, sizeof(conninfo));
}
return res;
}
static int send_list_devices_packet(int sfd, uint32_t tag)
{
int res = -1;
/* construct message plist */
plist_t plist = create_plist_message("ListDevices");
res = send_plist_packet(sfd, tag, plist);
plist_free(plist);
return res;
}
static int send_read_buid_packet(int sfd, uint32_t tag)
{
int res = -1;
/* construct message plist */
plist_t plist = create_plist_message("ReadBUID");
res = send_plist_packet(sfd, tag, plist);
plist_free(plist);
return res;
}
static int send_pair_record_packet(int sfd, uint32_t tag, const char* msgtype, const char* pair_record_id, uint32_t device_id, plist_t data)
{
int res = -1;
/* construct message plist */
plist_t plist = create_plist_message(msgtype);
plist_dict_set_item(plist, "PairRecordID", plist_new_string(pair_record_id));
if (data) {
plist_dict_set_item(plist, "PairRecordData", plist_copy(data));
}
if (device_id > 0) {
plist_dict_set_item(plist, "DeviceID", plist_new_uint(device_id));
}
res = send_plist_packet(sfd, tag, plist);
plist_free(plist);
return res;
}
/**
* Generates an event, i.e. calls the callback function.
* A reference to a populated usbmuxd_event_t with information about the event
* and the corresponding device will be passed to the callback function.
*/
static void generate_event(const usbmuxd_device_info_t *dev, enum usbmuxd_event_type event)
{
usbmuxd_event_t ev;
if (!dev) {
return;
}
ev.event = event;
memcpy(&ev.device, dev, sizeof(usbmuxd_device_info_t));
mutex_lock(&listener_mutex);
FOREACH(struct usbmuxd_subscription_context* context, &listeners) {
context->callback(&ev, context->user_data);
} ENDFOREACH
mutex_unlock(&listener_mutex);
}
static int usbmuxd_listen_poll()
{
int sfd;
sfd = connect_usbmuxd_socket();
if (sfd < 0) {
while (1) {
mutex_lock(&listener_mutex);
int num = collection_count(&listeners);
mutex_unlock(&listener_mutex);
if (num <= 0) {
break;
}
if ((sfd = connect_usbmuxd_socket()) >= 0) {
break;
}
sleep(1);
}
}
return sfd;
}
#ifdef HAVE_INOTIFY
#ifndef HAVE_PSELECT
static int pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, const struct timespec *timeout, const sigset_t *sigmask)
{
int ready;
struct timeval tv;
struct timeval *p_timeout;
sigset_t origmask;
if (timeout) {
tv.tv_sec = timeout->tv_sec;
tv.tv_usec = timeout->tv_nsec / 1000;
p_timeout = &tv;
} else {
p_timeout = NULL;
}
pthread_sigmask(SIG_SETMASK, sigmask, &origmask);
ready = select(nfds, readfds, writefds, exceptfds, p_timeout);
pthread_sigmask(SIG_SETMASK, &origmask, NULL);
return ready;
}
#endif
static int usbmuxd_listen_inotify()
{
int inot_fd;
int watch_d;
int sfd;
if (!use_inotify) {
return -2;
}
sfd = connect_usbmuxd_socket();
if (sfd >= 0)
return sfd;
sfd = -1;
inot_fd = inotify_init1(IN_CLOEXEC);
if (inot_fd < 0) {
LIBUSBMUXD_DEBUG(1, "%s: Failed to setup inotify\n", __func__);
return -2;
}
/* inotify is setup, listen for events that concern us */
watch_d = inotify_add_watch (inot_fd, USBMUXD_DIRNAME, IN_CREATE);
if (watch_d < 0) {
LIBUSBMUXD_DEBUG(1, "%s: Failed to setup watch descriptor for socket dir\n", __func__);
close (inot_fd);
return -2;
}
while (1) {
fd_set rfds;
struct timespec tv = {1, 0};
FD_ZERO(&rfds);
FD_SET(inot_fd, &rfds);
int r = pselect(inot_fd+1, &rfds, NULL, NULL, &tv, NULL);
if (r < 0) {
break;
}
if (r == 0) {
continue;
}
ssize_t len, i;
char buff[EVENT_BUF_LEN] = {0};
i = 0;
len = read (inot_fd, buff, EVENT_BUF_LEN -1);
if (len < 0)
goto end;
while (i < len) {
struct inotify_event *pevent = (struct inotify_event *) & buff[i];
/* check that it's ours */
if (pevent->mask & IN_CREATE &&
pevent->len &&
pevent->name[0] != 0 &&
strcmp(pevent->name, USBMUXD_SOCKET_NAME) == 0) {
/* retry if usbmuxd isn't ready yet */
int retry = 10;
while (--retry >= 0) {
if ((sfd = connect_usbmuxd_socket ()) >= 0) {
break;
}
sleep(1);
}
goto end;
}
i += EVENT_SIZE + pevent->len;
}
}
end:
inotify_rm_watch(inot_fd, watch_d);
close(inot_fd);
return sfd;
}
#endif /* HAVE_INOTIFY */
/**
* Tries to connect to usbmuxd and wait if it is not running.
*/
static int usbmuxd_listen()
{
int sfd;
uint32_t res = -1;
int tag;
retry:
#ifdef HAVE_INOTIFY
sfd = usbmuxd_listen_inotify();
if (sfd == -2)
sfd = usbmuxd_listen_poll();
#else