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-rw-r--r--Makefile26
-rw-r--r--iphone.c1089
-rw-r--r--iphone.h79
-rw-r--r--iproxy.c329
-rw-r--r--sock_stuff.c277
-rw-r--r--sock_stuff.h27
-rw-r--r--testclient.c148
-rw-r--r--usbmuxd.c795
-rw-r--r--usbmuxd.h44
9 files changed, 2814 insertions, 0 deletions
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..04a36b3
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+TARGET=usbmuxd
+CFLAGS=-Wall
+LDFLAGS=-lpthread -lusb -lrt
+
+objects = sock_stuff.o usbmuxd.o iphone.o
+
+all: $(TARGET)
+
+%.o: %.c %.h
+ $(CC) -o $@ $(CFLAGS) -c $<
+
+$(TARGET): $(objects)
+ $(CC) -o $@ $(LDFLAGS) $^
+
+clean:
+ rm -f *.o $(TARGET)
+
+realclean: clean
+ rm -f *~
+
+testclient: testclient.c sock_stuff.o
+ $(CC) $(LDFLAGS) -o testclient $(CFLAGS) $< sock_stuff.o
+
+iproxy: iproxy.c sock_stuff.o
+ $(CC) -lpthread -o iproxy $(CFLAGS) $< sock_stuff.o
+
diff --git a/iphone.c b/iphone.c
new file mode 100644
index 0000000..9035be9
--- /dev/null
+++ b/iphone.c
@@ -0,0 +1,1089 @@
+/*
+ * Copyright (c) 2008 Jing Su. All Rights Reserved.
+ *
+ * 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
+ */
+#include <stdint.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <usb.h>
+#include <stdio.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <pthread.h>
+#include "iphone.h"
+
+#define BULKIN 0x85
+#define BULKOUT 0x04
+#define HEADERLEN 28
+
+typedef uint16_t uint16;
+typedef uint32_t uint32;
+typedef uint8_t uint8;
+
+static const uint8 TCP_FIN = 1;
+static const uint8 TCP_SYN = 1 << 1;
+static const uint8 TCP_RST = 1 << 2;
+static const uint8 TCP_PSH = 1 << 3;
+static const uint8 TCP_ACK = 1 << 4;
+static const uint8 TCP_URG = 1 << 5;
+
+// I have trouble figuring out how to properly manage the windowing to
+// the iPhone. It keeps sending back 512 and seems to drop off a cliff
+// when the phone gets overwhelmed. In addition, the phone likes to
+// panic and send out RESETS before the window hits zero. Also, waiting
+// for responses seems to not be a winning strategy.
+//
+// Since I'm not sure how in the hell to interpret the window sizes that
+// the phone is sending back to us, I've figured out some magic number
+// constants which seem to work okay.
+static const uint32 WINDOW_MAX = 5 * 1024;
+static const uint32 WINDOW_INCREMENT = 512;
+
+
+struct iphone_device_int {
+ char *buffer;
+ struct usb_dev_handle *device;
+ struct usb_device *__device;
+};
+
+typedef struct {
+ uint32 type, length, major, minor, allnull;
+} usbmux_version_header;
+
+typedef struct {
+ uint32 type, length;
+ uint16 sport, dport;
+ uint32 scnt, ocnt;
+ uint8 offset, tcp_flags;
+ uint16 window, nullnull, length16;
+} usbmux_tcp_header;
+
+struct iphone_umux_client_int {
+ usbmux_tcp_header *header;
+ iphone_device_t phone;
+
+ char *recv_buffer;
+ int r_len;
+ pthread_cond_t wait;
+
+ // this contains a conditional variable which usb-writers can wait
+ // on while waiting for window updates from the phone.
+ pthread_cond_t wr_wait;
+ // I'm going to do something really cheesy here. We are going to
+ // just record the most recent scnt that we are expecting to hear
+ // back on. We will actually halt progress by limiting the number
+ // of outstanding un-acked bulk sends that we have beamed out.
+ uint32 wr_pending_scnt;
+ long wr_window;
+
+ pthread_mutex_t mutex;
+
+ // this variable is not protected by the mutex. This will always
+ // be E_SUCCESS, unless an error of some kind breaks this stream.
+ // this will then be set to the error that caused the broken stream.
+ // no further operations other than free_client will be allowed.
+ iphone_error_t error;
+};
+
+
+typedef struct {
+ char* buffer;
+ int leftover;
+ int capacity;
+} receivebuf_t;
+
+
+static pthread_mutex_t iphonemutex = PTHREAD_MUTEX_INITIALIZER;
+static iphone_umux_client_t *connlist = NULL;
+static int clients = 0;
+static receivebuf_t usbReceive = {NULL, 0, 0};
+
+
+/**
+ */
+int toto_debug = 0;
+void log_debug_msg(const char *format, ...)
+{
+#ifndef STRIP_DEBUG_CODE
+
+ va_list args;
+ /* run the real fprintf */
+ va_start(args, format);
+
+ if (toto_debug)
+ fprintf(stderr, format, args);
+
+ va_end(args);
+
+#endif
+}
+
+
+/** Creates a USBMux header containing version information
+ *
+ * @return A USBMux header
+ */
+usbmux_version_header *version_header()
+{
+ usbmux_version_header *version = (usbmux_version_header *) malloc(sizeof(usbmux_version_header));
+ version->type = 0;
+ version->length = htonl(20);
+ version->major = htonl(1);
+ version->minor = 0;
+ version->allnull = 0;
+ return version;
+}
+
+/**
+ * This function sets the configuration of the given device to 3
+ * and claims the interface 1. If usb_set_configuration fails, it detaches
+ * the kernel driver that blocks the device, and retries configuration.
+ *
+ * @param phone which device to configure
+ */
+static iphone_error_t iphone_config_usb_device(iphone_device_t phone)
+{
+ int ret;
+ int bytes;
+ char buf[512];
+
+ log_debug_msg("setting configuration...\n");
+ ret = usb_set_configuration(phone->device, 3);
+ if (ret != 0) {
+ log_debug_msg("Hm, usb_set_configuration returned %d: %s\n", ret, strerror(-ret));
+#if LIBUSB_HAS_GET_DRIVER_NP
+ log_debug_msg("trying to fix:\n");
+ log_debug_msg("-> detaching kernel driver... ");
+ ret = usb_detach_kernel_driver_np(phone->device, phone->__device->config->interface->altsetting->bInterfaceNumber);
+ if (ret != 0) {
+ log_debug_msg("usb_detach_kernel_driver_np returned %d: %s\n", ret, strerror(-ret));
+ } else {
+ log_debug_msg("done.\n");
+ log_debug_msg("setting configuration again... ");
+ ret = usb_set_configuration(phone->device, 3);
+ if (ret != 0) {
+ log_debug_msg("Error: usb_set_configuration returned %d: %s\n", ret, strerror(-ret));
+ log_debug_msg("--> trying to continue anyway...\n");
+ } else {
+ log_debug_msg("done.\n");
+ }
+ }
+#else
+ log_debug_msg("--> trying to continue anyway...\n");
+#endif
+ } else {
+ log_debug_msg("done.\n");
+ }
+
+ log_debug_msg("claiming interface... ");
+ ret = usb_claim_interface(phone->device, 1);
+ if (ret != 0) {
+ log_debug_msg("Error: usb_claim_interface returned %d: %s\n", ret, strerror(-ret));
+ return IPHONE_E_NO_DEVICE;
+ } else {
+ log_debug_msg("done.\n");
+ }
+
+ do {
+ bytes = usb_bulk_read(phone->device, BULKIN, buf, 512, 800);
+ } while (bytes > 0);
+
+ return IPHONE_E_SUCCESS;
+}
+
+/**
+ * Given a USB bus and device number, returns a device handle to the iPhone on
+ * that bus. To aid compatibility with future devices, this function does not
+ * check the vendor and device IDs! To do that, you should use
+ * iphone_get_device() or a system-specific API (e.g. HAL).
+ *
+ * @param bus_n The USB bus number.
+ * @param dev_n The USB device number.
+ * @param device A pointer to a iphone_device_t, which must be set to NULL upon
+ * calling iphone_get_specific_device, which will be filled with a device
+ * descriptor on return.
+ * @return IPHONE_E_SUCCESS if ok, otherwise an error code.
+ */
+iphone_error_t iphone_get_specific_device(int bus_n, int dev_n, iphone_device_t * device)
+{
+ struct usb_bus *bus, *busses;
+ struct usb_device *dev;
+ usbmux_version_header *version;
+ int bytes = 0;
+
+ //check we can actually write in device
+ if (!device || (device && *device))
+ return IPHONE_E_INVALID_ARG;
+
+ iphone_device_t phone = (iphone_device_t) malloc(sizeof(struct iphone_device_int));
+
+ // Initialize the struct
+ phone->device = NULL;
+ phone->__device = NULL;
+ phone->buffer = NULL;
+
+ // Initialize libusb
+ usb_init();
+ usb_find_busses();
+ usb_find_devices();
+ busses = usb_get_busses();
+
+ // Set the device configuration
+ for (bus = busses; bus; bus = bus->next)
+ if (bus->location == bus_n)
+ for (dev = bus->devices; dev != NULL; dev = dev->next)
+ if (dev->devnum == dev_n) {
+ phone->__device = dev;
+ phone->device = usb_open(phone->__device);
+ iphone_config_usb_device(phone);
+ goto found;
+ }
+
+ iphone_free_device(phone);
+
+ log_debug_msg("iphone_get_specific_device: iPhone not found\n");
+ return IPHONE_E_NO_DEVICE;
+
+ found:
+ // Send the version command to the phone
+ version = version_header();
+ bytes = usb_bulk_write(phone->device, BULKOUT, (char *) version, sizeof(*version), 800);
+ if (bytes < 20) {
+ log_debug_msg("get_iPhone(): libusb did NOT send enough!\n");
+ if (bytes < 0) {
+ log_debug_msg("get_iPhone(): libusb gave me the error %d: %s (%s)\n",
+ bytes, usb_strerror(), strerror(-bytes));
+ }
+ }
+ // Read the phone's response
+ bytes = usb_bulk_read(phone->device, BULKIN, (char *) version, sizeof(*version), 800);
+
+ // Check for bad response
+ if (bytes < 20) {
+ free(version);
+ iphone_free_device(phone);
+ log_debug_msg("get_iPhone(): Invalid version message -- header too short.\n");
+ if (bytes < 0)
+ log_debug_msg("get_iPhone(): libusb error message %d: %s (%s)\n", bytes, usb_strerror(), strerror(-bytes));
+ return IPHONE_E_NOT_ENOUGH_DATA;
+ }
+ // Check for correct version
+ if (ntohl(version->major) == 1 && ntohl(version->minor) == 0) {
+ // We're all ready to roll.
+ fprintf(stderr, "get_iPhone() success\n");
+ free(version);
+ *device = phone;
+ return IPHONE_E_SUCCESS;
+ } else {
+ // Bad header
+ iphone_free_device(phone);
+ free(version);
+ log_debug_msg("get_iPhone(): Received a bad header/invalid version number.");
+ return IPHONE_E_BAD_HEADER;
+ }
+
+ // If it got to this point it's gotta be bad
+ log_debug_msg("get_iPhone(): Unknown error.\n");
+ iphone_free_device(phone);
+ free(version);
+ return IPHONE_E_UNKNOWN_ERROR; // if it got to this point it's gotta be bad
+}
+
+
+/**
+ * Scans all USB busses and devices for a known AFC-compatible device and
+ * returns a handle to the first such device it finds. Known devices include
+ * those with vendor ID 0x05ac and product ID between 0x1290 and 0x1293
+ * inclusive.
+ *
+ * This function is convenient, but on systems where higher-level abstractions
+ * (such as HAL) are available it may be preferable to use
+ * iphone_get_specific_device instead, because it can deal with multiple
+ * connected devices as well as devices not known to libiphone.
+ *
+ * @param device Upon calling this function, a pointer to a location of type
+ * iphone_device_t, which must have the value NULL. On return, this location
+ * will be filled with a handle to the device.
+ * @return IPHONE_E_SUCCESS if ok, otherwise an error code.
+ */
+iphone_error_t iphone_get_device(iphone_device_t * device)
+{
+ struct usb_bus *bus;
+ struct usb_device *dev;
+
+ pthread_mutex_init(&iphonemutex, NULL);
+
+ usb_init();
+ usb_find_busses();
+ usb_find_devices();
+
+ for (bus = usb_get_busses(); bus != NULL; bus = bus->next)
+ for (dev = bus->devices; dev != NULL; dev = dev->next)
+ if (dev->descriptor.idVendor == 0x05ac
+ && dev->descriptor.idProduct >= 0x1290 && dev->descriptor.idProduct <= 0x1293)
+ return iphone_get_specific_device(bus->location, dev->devnum, device);
+
+ return IPHONE_E_NO_DEVICE;
+}
+
+/** Cleans up an iPhone structure, then frees the structure itself.
+ * This is a library-level function; deals directly with the iPhone to tear
+ * down relations, but otherwise is mostly internal.
+ *
+ * @param phone A pointer to an iPhone structure.
+ */
+iphone_error_t iphone_free_device(iphone_device_t device)
+{
+ char buf[512];
+ int bytes;
+
+ if (!device)
+ return IPHONE_E_INVALID_ARG;
+ iphone_error_t ret = IPHONE_E_UNKNOWN_ERROR;
+
+ do {
+ bytes = usb_bulk_read(device->device, BULKIN, buf, 512, 800);
+ } while (bytes > 0);
+
+ if (device->buffer) {
+ free(device->buffer);
+ }
+ if (device->device) {
+ usb_release_interface(device->device, 1);
+ usb_close(device->device);
+ ret = IPHONE_E_SUCCESS;
+ }
+ free(device);
+
+ pthread_mutex_destroy(&iphonemutex);
+
+ return ret;
+}
+
+
+
+/** Sends data to the phone
+ * This is a low-level (i.e. directly to phone) function.
+ *
+ * @param phone The iPhone to send data to
+ * @param data The data to send to the iPhone
+ * @param datalen The length of the data
+ * @return The number of bytes sent, or -ERRNO on error
+ */
+int send_to_phone(iphone_device_t phone, char *data, int datalen)
+{
+ if (!phone)
+ return -1;
+
+ int timeout = 1000;
+ int retrycount = 0;
+ int bytes = 0;
+ do {
+ if (retrycount > 3) {
+ fprintf(stderr, "EPIC FAIL! aborting on retry count overload.\n");
+ return -1;
+ }
+
+ bytes = usb_bulk_write(phone->device, BULKOUT, data, datalen, timeout);
+ if (bytes == -ETIMEDOUT) {
+ // timed out waiting for write.
+ fprintf(stderr, "usb_bulk_write timeout error.\n");
+ return bytes;
+ }
+ else if (bytes < 0) {
+ fprintf(stderr, "usb_bulk_write failed with error. err:%d (%s)(%s)\n",
+ bytes, usb_strerror(), strerror(-bytes));
+ return -1;
+ }
+ else if (bytes == 0) {
+ fprintf(stderr, "usb_bulk_write sent nothing. retrying.\n");
+ timeout = timeout * 4;
+ retrycount++;
+ continue;
+ }
+ else if (bytes < datalen) {
+ fprintf(stderr, "usb_bulk_write failed to send full dataload. %d of %d\n", bytes, datalen);
+ timeout = timeout * 4;
+ retrycount++;
+ data += bytes;
+ datalen -= bytes;
+ continue;
+ }
+ }
+ while(0); // fall out
+
+ return bytes;
+}
+
+/**
+ */
+int recv_from_phone_timeout(iphone_device_t phone, char *data, int datalen, int timeoutmillis)
+{
+ if (!phone)
+ return -1;
+ int bytes = 0;
+
+ if (!phone)
+ return -1;
+ log_debug_msg("recv_from_phone(): attempting to receive %i bytes\n", datalen);
+
+ bytes = usb_bulk_read(phone->device, BULKIN, data, datalen, timeoutmillis);
+ if (bytes < 0) {
+ // there are some things which are errors, others which are no problem.
+ // it's not documented in libUSB, but it seems that the error returns are
+ // just negated ERRNO values.
+ if (bytes == -ETIMEDOUT) {
+ // ignore this. it just means timeout reached before we
+ // picked up any data. no problem.
+ }
+ else {
+ fprintf(stderr, "recv_from_phone(): libusb gave me the error %d: %s (%s)\n", bytes, usb_strerror(),
+ strerror(-bytes));
+ log_debug_msg("recv_from_phone(): libusb gave me the error %d: %s (%s)\n", bytes, usb_strerror(),
+ strerror(-bytes));
+ }
+ return -1;
+ }
+
+ return bytes;
+}
+
+/** This function is a low-level (i.e. direct to iPhone) function.
+ *
+ * @param phone The iPhone to receive data from
+ * @param data Where to put data read
+ * @param datalen How much data to read in
+ *
+ * @return How many bytes were read in, or -1 on error.
+ */
+int recv_from_phone(iphone_device_t phone, char *data, int datalen) {
+ return recv_from_phone_timeout(phone, data, datalen, 100);
+}
+
+
+/** Creates a USBMux packet for the given set of ports.
+ *
+ * @param s_port The source port for the connection.
+ * @param d_port The destination port for the connection.
+ *
+ * @return A USBMux packet
+ */
+usbmux_tcp_header *new_mux_packet(uint16 s_port, uint16 d_port)
+{
+ usbmux_tcp_header *conn = (usbmux_tcp_header *) malloc(sizeof(usbmux_tcp_header));
+ conn->type = htonl(6);
+ conn->length = HEADERLEN;
+ conn->sport = htons(s_port);
+ conn->dport = htons(d_port);
+ conn->scnt = 0;
+ conn->ocnt = 0;
+ conn->offset = 0x50;
+ conn->window = htons(0x0200);
+ conn->nullnull = 0x0000;
+ conn->length16 = HEADERLEN;
+ return conn;
+}
+
+
+/** Removes a connection from the list of connections made.
+ * The list of connections is necessary for buffering.
+ *
+ * @param connection The connection to delete from the tracking list.
+ */
+static void delete_connection(iphone_umux_client_t connection)
+{
+ pthread_mutex_lock(&iphonemutex);
+
+ // update the global list of connections
+ iphone_umux_client_t *newlist = (iphone_umux_client_t *) malloc(sizeof(iphone_umux_client_t) * (clients - 1));
+ int i = 0, j = 0;
+ for (i = 0; i < clients; i++) {
+ if (connlist[i] == connection)
+ continue;
+ else {
+ newlist[j] = connlist[i];
+ j++;
+ }
+ }
+ free(connlist);
+ connlist = newlist;
+ clients--;
+
+ // free up this connection
+ pthread_mutex_lock(&connection->mutex);
+ if (connection->recv_buffer)
+ free(connection->recv_buffer);
+ if (connection->header)
+ free(connection->header);
+ connection->r_len = 0;
+ pthread_mutex_unlock(&connection->mutex);
+ pthread_mutex_destroy(&connection->mutex);
+ free(connection);
+
+ pthread_mutex_unlock(&iphonemutex);
+}
+
+/** Adds a connection to the list of connections made.
+ * The connection list is necessary for buffering.
+ *
+ * @param connection The connection to add to the global list of connections.
+ */
+
+static void add_connection(iphone_umux_client_t connection)
+{
+ pthread_mutex_lock(&iphonemutex);
+ iphone_umux_client_t *newlist =
+ (iphone_umux_client_t *) realloc(connlist, sizeof(iphone_umux_client_t) * (clients + 1));
+ newlist[clients] = connection;
+ connlist = newlist;
+ clients++;
+ pthread_mutex_unlock(&iphonemutex);
+}
+
+/**
+ * Get a source port number that is not used by one of our connections
+ * This is needed for us to make sure we are not sending on another
+ * connection.
+ */
+static uint16_t get_free_port()
+{
+ int i;
+ uint16_t newport = 30000;
+ int cnt = 0;
+
+ pthread_mutex_lock(&iphonemutex);
+ while (1) {
+ cnt = 0;
+ for (i = 0; i < clients; i++) {
+ if (ntohs(connlist[i]->header->sport) == newport) {
+ cnt++;
+ }
+ }
+ if (cnt == 0) {
+ // newport is not used in our list of connections!
+ break;
+ } else {
+ newport++;
+ if (newport < 30000) {
+ // if all ports from 30000 to 65535 are in use,
+ // the value wraps (16-bit overflow)
+ // return 0, no port is available.
+ // This should not happen, but just in case ;)
+ newport = 0;
+ break;
+ }
+ }
+ }
+ pthread_mutex_unlock(&iphonemutex);
+
+ return newport;
+}
+
+/** Initializes a connection on phone, with source port s_port and destination port d_port
+ *
+ * @param device The iPhone to initialize a connection on.
+ * @param src_port The source port
+ * @param dst_port The destination port -- 0xf27e for lockdownd.
+ * @param client A mux TCP header for the connection which is used for tracking and data transfer.
+ * @return IPHONE_E_SUCCESS on success, an error code otherwise.
+ */
+iphone_error_t iphone_mux_new_client(iphone_device_t device, uint16_t src_port, uint16_t dst_port,
+ iphone_umux_client_t * client)
+{
+ if (!device || !dst_port)
+ return IPHONE_E_INVALID_ARG;
+
+ src_port = get_free_port();
+
+ if (!src_port) {
+ // this is a special case, if we get 0, this is not good, so
+ return -EISCONN; // TODO: error code suitable?
+ }
+
+ // Initialize connection stuff
+ iphone_umux_client_t new_connection = (iphone_umux_client_t) malloc(sizeof(struct iphone_umux_client_int));
+ new_connection->header = new_mux_packet(src_port, dst_port);
+
+ // send TCP syn
+ if (new_connection && new_connection->header) {
+ new_connection->header->tcp_flags = TCP_SYN;
+ new_connection->header->length = htonl(new_connection->header->length);
+ new_connection->header->length16 = htons(new_connection->header->length16);
+ new_connection->header->scnt = 0;
+ new_connection->header->ocnt = 0;
+ new_connection->phone = device;
+ new_connection->recv_buffer = NULL;
+ new_connection->r_len = 0;
+ pthread_cond_init(&new_connection->wait, NULL);
+ pthread_mutex_init(&new_connection->mutex, NULL);
+ pthread_cond_init(&new_connection->wr_wait, NULL);
+ new_connection->wr_pending_scnt = 0;
+ new_connection->wr_window = 0;
+ add_connection(new_connection);
+ new_connection->error = IPHONE_E_SUCCESS;
+ if (send_to_phone(device, (char *) new_connection->header, sizeof(usbmux_tcp_header)) >= 0) {
+ *client = new_connection;
+ return IPHONE_E_SUCCESS;
+ } else {
+ delete_connection(new_connection);
+ return IPHONE_E_NOT_ENOUGH_DATA;
+ }
+ }
+ // if we get to this point it's probably bad
+ return IPHONE_E_UNKNOWN_ERROR;
+}
+
+/** Cleans up the given USBMux connection.
+ * @note Once a connection is closed it may not be used again.
+ *
+ * @param connection The connection to close.
+ *
+ * @return IPHONE_E_SUCCESS on success.
+ */
+iphone_error_t iphone_mux_free_client(iphone_umux_client_t client)
+{
+ if (!client || !client->phone)
+ return IPHONE_E_INVALID_ARG;
+
+ pthread_mutex_lock(&client->mutex);
+ client->header->tcp_flags = TCP_FIN;
+ client->header->length = htonl(0x1C);
+ client->header->scnt = htonl(client->header->scnt);
+ client->header->ocnt = htonl(client->header->ocnt);
+ client->header->window = 0;
+ client->header->length16 = htons(0x1C);
+ int bytes = 0;
+
+ bytes = usb_bulk_write(client->phone->device, BULKOUT, (char *) client->header, sizeof(usbmux_tcp_header), 800);
+ if (bytes < 0)
+ log_debug_msg("iphone_mux_free_client(): when writing, libusb gave me the error: %s\n", usb_strerror());
+
+ bytes = usb_bulk_read(client->phone->device, BULKIN, (char *) client->header, sizeof(usbmux_tcp_header), 800);
+ if (bytes < 0)
+ log_debug_msg("get_iPhone(): when reading, libusb gave me the error: %s\n", usb_strerror());
+
+ pthread_mutex_unlock(&client->mutex);
+ // make sure we don't have any last-minute laggards waiting on this.
+ // I put it after the mutex unlock because we have cases where the
+ // conditional wait is dependent on re-grabbing that mutex.
+ pthread_cond_broadcast(&client->wait);
+ pthread_cond_destroy(&client->wait);
+ pthread_cond_broadcast(&client->wr_wait);
+ pthread_cond_destroy(&client->wr_wait);
+
+ delete_connection(client);
+
+ return IPHONE_E_SUCCESS;
+}
+
+
+/** Sends the given data over the selected connection.
+ *
+ * @param phone The iPhone to send to.
+ * @param client The client we're sending data on.
+ * @param data A pointer to the data to send.
+ * @param datalen How much data we're sending.
+ * @param sent_bytes The number of bytes sent, minus the header (28)
+ *
+ * @return IPHONE_E_SUCCESS on success.
+ */
+iphone_error_t iphone_mux_send(iphone_umux_client_t client, const char *data, uint32_t datalen, uint32_t * sent_bytes)
+{
+ if (!client->phone || !client || !sent_bytes)
+ return IPHONE_E_INVALID_ARG;
+
+ if (client->error != IPHONE_E_SUCCESS) {
+ return client->error;
+ }
+
+ *sent_bytes = 0;
+ pthread_mutex_lock(&client->mutex);
+
+ int sendresult = 0;
+ uint32 blocksize = 0;
+ if (client->wr_window <= 0) {
+ struct timespec ts;
+ clock_gettime(CLOCK_REALTIME, &ts);
+ //ts.tv_sec += 1;
+ ts.tv_nsec += 750 * 1000;
+ if (pthread_cond_timedwait(&client->wait, &client->mutex, &ts) == ETIMEDOUT) {
+ // timd out. optimistically grow the window and try to make progress
+ client->wr_window += WINDOW_INCREMENT;
+ }
+ }
+
+ blocksize = sizeof(usbmux_tcp_header) + datalen;
+
+ // client->scnt and client->ocnt should already be in host notation...
+ // we don't need to change them juuuust yet.
+ char *buffer = (char *) malloc(blocksize + 2); // allow 2 bytes of safety padding
+ // Set the length and pre-emptively htonl/htons it
+ client->header->length = htonl(blocksize);
+ client->header->length16 = htons(blocksize);
+
+ // Put scnt and ocnt into big-endian notation
+ client->header->scnt = htonl(client->header->scnt);
+ client->header->ocnt = htonl(client->header->ocnt);
+ // Concatenation of stuff in the buffer.
+ memcpy(buffer, client->header, sizeof(usbmux_tcp_header));
+ memcpy(buffer + sizeof(usbmux_tcp_header), data, datalen);
+
+ sendresult = send_to_phone(client->phone, buffer, blocksize);
+ // Now that we've sent it off, we can clean up after our sloppy selves.
+ if (buffer)
+ free(buffer);
+
+ // update counts ONLY if the send succeeded.
+ if (sendresult == blocksize) {
+ // Re-calculate scnt and ocnt
+ client->header->scnt = ntohl(client->header->scnt) + datalen;
+ client->header->ocnt = ntohl(client->header->ocnt);
+ // Revert lengths
+ client->header->length = ntohl(client->header->length);
+ client->header->length16 = ntohs(client->header->length16);
+
+ client->wr_window -= blocksize;
+ }
+
+
+ pthread_mutex_unlock(&client->mutex);
+
+
+ if (sendresult == -ETIMEDOUT || sendresult == 0) {
+ // no problem for now...
+ *sent_bytes = 0;
+ return IPHONE_E_TIMEOUT;
+ }
+ else if (sendresult < 0) {
+ return IPHONE_E_UNKNOWN_ERROR;
+ }
+ else if (sendresult == blocksize) {
+ // actual number of data bytes sent.
+ *sent_bytes = sendresult - HEADERLEN;
+ return IPHONE_E_SUCCESS;
+ }
+ else {
+ fprintf(stderr, "usbsend managed to dump a packet that is not full size. %d of %d\n",
+ sendresult, blocksize);
+ return IPHONE_E_UNKNOWN_ERROR;
+ }
+}
+
+/** append the packet's DATA to the receive buffer for the client.
+ *
+ * this has a few other corner-case functions:
+ * 1. this will properly handle the handshake syn+ack.
+ * 2. for all receives, this will appropriately update the ocnt.
+ *
+ * @return number of bytes consumed (header + data)
+ */
+uint32 append_receive_buffer(iphone_umux_client_t client, char* packet)
+{
+ if (client == NULL || packet == NULL) return 0;
+
+ usbmux_tcp_header *header = (usbmux_tcp_header *) packet;
+ char* data = &packet[HEADERLEN];
+ uint32 packetlen = ntohl(header->length);
+ uint32 datalen = packetlen-HEADERLEN;
+
+ int dobroadcast = 0;
+
+ pthread_mutex_lock(&client->mutex);
+
+ // we need to handle a few corner case tasks and book-keeping which
+ // falls on our responsibility because we are the ones reading in
+ // feedback.
+ if (client->header->scnt == 0 && client->header->ocnt == 0 ) {
+ fprintf(stdout, "client is still waiting for handshake.\n");
+ if (header->tcp_flags == (TCP_SYN | TCP_ACK)) {
+ fprintf(stdout, "yes, got syn+ack ; replying with ack.\n");
+ client->header->tcp_flags = TCP_ACK;
+ client->header->length = htonl(sizeof(usbmux_tcp_header));
+ client->header->length16 = htons(sizeof(usbmux_tcp_header));
+ client->header->scnt = htonl(client->header->scnt + 1);
+ client->header->ocnt = header->ocnt;
+ // push it to USB
+ // TODO: need to check for error in the send here.... :(
+ if (send_to_phone(client->phone, (char *)client->header, sizeof(usbmux_tcp_header)) <= 0) {
+ fprintf(stdout, "%s: error when pushing to usb...\n", __func__);
+ }
+ // need to revert some of the fields back to host notation.
+ client->header->scnt = ntohl(client->header->scnt);
+ client->header->ocnt = ntohl(client->header->ocnt);
+ client->header->length = ntohl(client->header->length);
+ client->header->length16 = ntohs(client->header->length16);
+ }
+ else {
+ client->error = IPHONE_E_ECONNABORTED;
+ // woah... this connection failed us.
+ // TODO: somehow signal that this stream is a no-go.
+ fprintf(stderr, "WOAH! client failed to get proper syn+ack.\n");
+ }
+ }
+
+ // update TCP counters and windows.
+ //
+ // save the window that we're getting from the USB device.
+ // apparently the window is bigger than just the 512 that's typically
+ // advertised. iTunes apparently shifts this value by 8 to get a much
+ // larger number.
+ if (header->tcp_flags & TCP_RST) {
+ client->error = IPHONE_E_ECONNRESET;
+ fprintf(stderr, "peer sent connection reset. setting error: %d\n", client->error);
+ }
+
+ // the packet's ocnt tells us how much of our data the device has received.
+ if (header->tcp_flags & TCP_ACK) {
+
+ // this is a hacky magic number condition. it seems that once the window
+ // reported by the phone starts to drop below this number, we quickly fall
+ // into connection reset problems. Once we see the reported window size
+ // start falling off, cut off and wait for solid acks to come back.
+ if (ntohs(header->window) < 256)
+ client->wr_window = 0;
+
+ // check what just got acked.
+ if (ntohl(header->ocnt) < client->header->scnt) {
+ // we got some kind of ack, but it hasn't caught up with the
+ // pending that have been sent.
+ pthread_cond_broadcast(&client->wr_wait);
+ }
+ else if (ntohl(header->ocnt) > /*client->wr_pending_scnt*/ client->header->scnt) {
+ fprintf(stderr, "WTF?! acks overtook pending outstanding. %u,%u\n",
+ ntohl(header->ocnt), client->wr_pending_scnt);
+ }
+ else {
+ // reset the window
+ client->wr_window = WINDOW_MAX;
+ pthread_cond_broadcast(&client->wr_wait);
+ }
+ }
+
+ // the packet's scnt will be our new ocnt.
+ client->header->ocnt = ntohl(header->scnt);
+
+ // ensure there is enough space, either by first malloc or realloc
+ if (datalen > 0) {
+ if (client->r_len == 0) dobroadcast = 1;
+
+ if (client->recv_buffer == NULL) {
+ client->recv_buffer = malloc(datalen);
+ client->r_len = 0;
+ }
+ else {
+ client->recv_buffer = realloc(client->recv_buffer, client->r_len + datalen);
+ }
+
+ memcpy(&client->recv_buffer[client->r_len], data, datalen);
+ client->r_len += datalen;
+ }
+
+ pthread_mutex_unlock(&client->mutex);
+
+ // I put this outside the mutex unlock just so that when the threads
+ // wake, we don't have to do another round of unlock+try to grab.
+ if (dobroadcast)
+ pthread_cond_broadcast(&client->wait);
+
+
+ return packetlen;
+}
+
+/** NOTE! THERE IS NO MUTEX LOCK IN THIS FUNCTION!
+ because we're only called from one location, pullbulk, where the lock
+ is already held.
+ */
+iphone_umux_client_t find_client(usbmux_tcp_header* recv_header)
+{
+ // remember, as we're looking for the client, the receive header is
+ // coming from the USB into our client. This means that when we check
+ // the src/dst ports, we need to reverse them.
+ iphone_umux_client_t retval = NULL;
+
+ // just for debugging check, I'm going to convert the numbers to host-endian.
+ uint16 hsport = ntohs(recv_header->sport);
+ uint16 hdport = ntohs(recv_header->dport);
+
+ pthread_mutex_lock(&iphonemutex);
+ int i;
+ for (i = 0; i < clients; i++) {
+ uint16 csport = ntohs(connlist[i]->header->sport);
+ uint16 cdport = ntohs(connlist[i]->header->dport);
+
+ if (hsport == cdport && hdport == csport) {
+ retval = connlist[i];
+ break;
+ }
+ }
+ pthread_mutex_unlock(&iphonemutex);
+
+ return retval;
+}
+
+/** pull in a big USB bulk packet and distribute it to queues appropriately.
+ */
+void iphone_mux_pullbulk(iphone_device_t phone)
+{
+ static const int DEFAULT_CAPACITY = 128*1024;
+ if (usbReceive.buffer == NULL) {
+ usbReceive.capacity = DEFAULT_CAPACITY;
+ usbReceive.buffer = malloc(usbReceive.capacity);
+ usbReceive.leftover = 0;
+ }
+
+ // start the cursor off just ahead of the leftover.
+ char* cursor = &usbReceive.buffer[usbReceive.leftover];
+ // pull in content, note that the amount we can pull is capacity minus leftover
+ int readlen = recv_from_phone_timeout(phone, cursor, usbReceive.capacity - usbReceive.leftover, 5000);
+ if (readlen < 0) {
+ //fprintf(stderr, "recv_from_phone_timeout gave us an error.\n");
+ readlen = 0;
+ }
+ if (readlen > 0) {
+ //fprintf(stdout, "recv_from_phone_timeout pulled an extra %d bytes\n", readlen);
+ }
+
+ // the amount of content we have to work with is the remainder plus
+ // what we managed to read
+ usbReceive.leftover += readlen;
+
+ // reset the cursor to the front of that buffer and work through
+ // trying to decode packets out of them.
+ cursor = usbReceive.buffer;
+ while (1) {
+ // check if there's even sufficient data to decode a header
+ if (usbReceive.leftover < HEADERLEN) break;
+ usbmux_tcp_header *header = (usbmux_tcp_header *) cursor;
+
+ // now that we have a header, check if there is sufficient data
+ // to construct a full packet, including its data
+ uint32 packetlen = ntohl(header->length);
+ if (usbReceive.leftover < packetlen) {
+ break;
+ }
+
+ // ok... find the client this packet will get stuffed to.
+ iphone_umux_client_t client = find_client(header);
+ if (client == NULL) {
+ fprintf(stderr, "WARNING: client for packet cannot be found. dropping packet.\n");
+ }
+ else {
+ // stuff the data
+ append_receive_buffer(client, cursor);
+ }
+
+ // move the cursor and account for the consumption
+ cursor += packetlen;
+ usbReceive.leftover -= packetlen;
+ }
+
+ // now, we need to manage any leftovers.
+ // I'm going to manage the leftovers by alloc'ing a new block and copying
+ // the leftovers to it. This is just to prevent problems with memory
+ // moves where there may be overlap. Besides, the leftovers should be
+ // small enough that this copy is minimal in overhead.
+ //
+ // if there are no leftovers, we just leave the datastructure as is,
+ // and re-use the block next time.
+ if (usbReceive.leftover > 0 && cursor != usbReceive.buffer) {
+ char* newbuff = malloc(DEFAULT_CAPACITY);
+ memcpy(newbuff, cursor, usbReceive.leftover);
+ free(usbReceive.buffer);
+ usbReceive.buffer = newbuff;
+ usbReceive.capacity = DEFAULT_CAPACITY;
+ }
+}
+
+/**
+ * return the error code stored in iphone_umux_client_t structure,
+ * e.g. non-zero when an usb read error occurs.
+ *
+ * @param client the umux client
+ *
+ * @return IPHONE_E_* error codes.
+ */
+iphone_error_t iphone_mux_get_error(iphone_umux_client_t client)
+{
+ if (!client) {
+ return 0;
+ }
+
+ return client->error;
+}
+
+/** This is a higher-level USBMuxTCP-like function
+ *
+ * @param connection The connection to receive data on.
+ * @param data Where to put the data we receive.
+ * @param datalen How much data to read.
+ *
+ * @return IPHONE_E_SUCCESS or error code if failure.
+ */
+iphone_error_t iphone_mux_recv(iphone_umux_client_t client, char *data, uint32_t datalen, uint32_t * recv_bytes)
+{
+ return iphone_mux_recv_timeout(client, data, datalen, recv_bytes, 0);
+}
+
+/**
+ @param timeout
+ */
+iphone_error_t iphone_mux_recv_timeout(iphone_umux_client_t client, char *data, uint32_t datalen, uint32_t * recv_bytes, int timeout)
+{
+
+ if (!client || !data || datalen == 0 || !recv_bytes)
+ return IPHONE_E_INVALID_ARG;
+
+ if (client->error != IPHONE_E_SUCCESS) return client->error;
+
+ pthread_mutex_lock(&client->mutex);
+
+ if (timeout > 0 && (client->recv_buffer == NULL ||client->r_len == 0)) {
+ struct timespec ts;
+ clock_gettime(CLOCK_REALTIME, &ts);
+ ts.tv_sec += timeout/1000;
+ ts.tv_nsec += (timeout-((int)(timeout/1000))*1000)*1000; //millis * 1000;
+ pthread_cond_timedwait(&client->wait, &client->mutex, &ts);
+ }
+
+ *recv_bytes = 0;
+ if (client->recv_buffer != NULL && client->r_len > 0) {
+ uint32_t foolen = datalen;
+ if (foolen > client->r_len) foolen = client->r_len;
+ memcpy(data, client->recv_buffer, foolen);
+ *recv_bytes = foolen;
+
+ // preserve any left-over unread amounts.
+ int remainder = client->r_len - foolen;
+ if (remainder > 0) {
+ char* newbuf = malloc(remainder);
+ memcpy(newbuf, client->recv_buffer + foolen, remainder);
+ client->r_len = remainder;
+ free(client->recv_buffer);
+ client->recv_buffer = newbuf;
+ }
+ else {
+ free(client->recv_buffer);
+ client->recv_buffer = NULL;
+ client->r_len = 0;
+ }
+ }
+
+ pthread_mutex_unlock(&client->mutex);
+
+
+ return IPHONE_E_SUCCESS;
+}
diff --git a/iphone.h b/iphone.h
new file mode 100644
index 0000000..e132cd5
--- /dev/null
+++ b/iphone.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2008 Jing Su. All Rights Reserved.
+ *
+ * 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
+ */
+
+#ifndef __IPHONE_H__
+#define __IPHONE_H__
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+//general errors
+#define IPHONE_E_SUCCESS 0
+#define IPHONE_E_INVALID_ARG -1
+#define IPHONE_E_UNKNOWN_ERROR -2
+#define IPHONE_E_NO_DEVICE -3
+#define IPHONE_E_TIMEOUT -4
+#define IPHONE_E_NOT_ENOUGH_DATA -5
+#define IPHONE_E_BAD_HEADER -6
+
+//lockdownd specific error
+#define IPHONE_E_INVALID_CONF -7
+#define IPHONE_E_PAIRING_FAILED -8
+#define IPHONE_E_SSL_ERROR -9
+#define IPHONE_E_PLIST_ERROR -10
+#define IPHONE_E_DICT_ERROR -11
+
+//afc specific error
+#define IPHONE_E_NO_SUCH_FILE -12
+
+//general TCP-style errors and conditions
+#define IPHONE_E_ECONNABORTED -ECONNABORTED
+#define IPHONE_E_ECONNRESET -ECONNRESET
+#define IPHONE_E_ENOTCONN -ENOTCONN
+#define IPHONE_E_ESHUTDOWN -ESHUTDOWN
+#define IPHONE_E_ETIMEDOUT -ETIMEDOUT
+#define IPHONE_E_ECONNREFUSED -ECONNREFUSED
+
+
+typedef int16_t iphone_error_t;
+
+struct iphone_device_int;
+typedef struct iphone_device_int *iphone_device_t;
+
+struct iphone_umux_client_int;
+typedef struct iphone_umux_client_int *iphone_umux_client_t;
+
+iphone_error_t iphone_get_device ( iphone_device_t *device );
+iphone_error_t iphone_get_specific_device(int bus_n, int dev_n, iphone_device_t * device);
+iphone_error_t iphone_free_device ( iphone_device_t device );
+
+
+iphone_error_t iphone_mux_new_client ( iphone_device_t device, uint16_t src_port, uint16_t dst_port, iphone_umux_client_t *client );
+iphone_error_t iphone_mux_free_client ( iphone_umux_client_t client );
+
+iphone_error_t iphone_mux_send(iphone_umux_client_t client, const char *data, uint32_t datalen, uint32_t * sent_bytes);
+
+iphone_error_t iphone_mux_recv(iphone_umux_client_t client, char *data, uint32_t datalen, uint32_t * recv_bytes);
+iphone_error_t iphone_mux_recv_timeout(iphone_umux_client_t client, char *data, uint32_t datalen, uint32_t * recv_bytes, int timeout);
+
+void iphone_mux_pullbulk(iphone_device_t phone);
+
+iphone_error_t iphone_mux_get_error(iphone_umux_client_t client);
+
+#endif
diff --git a/iproxy.c b/iproxy.c
new file mode 100644
index 0000000..df3d689
--- /dev/null
+++ b/iproxy.c
@@ -0,0 +1,329 @@
+/*
+ * iproxy -- proxy that enables tcp service access to iPhone/iPod
+ * via USB cable
+ * TODO: improve code...
+ *
+ * Copyright (c) 2009 Nikias Bassen. All Rights Reserved.
+ * Based upon iTunnel source code, Copyright (c) 2008 Jing Su.
+ * http://www.cs.toronto.edu/~jingsu/itunnel/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <pthread.h>
+#include "usbmuxd.h"
+#include "sock_stuff.h"
+
+#define SOCKET_FILE "/var/run/usbmuxd"
+
+volatile int stop_ctos = 0;
+volatile int stop_stoc = 0;
+
+static uint16_t listen_port = 0;
+static uint16_t device_port = 0;
+
+pthread_mutex_t smutex = PTHREAD_MUTEX_INITIALIZER;
+
+struct client_data {
+ int fd;
+ int sfd;
+};
+
+int usbmuxd_get_result(int sfd, uint32_t tag, uint32_t *result)
+{
+ struct usbmux_result res;
+ int recv_len;
+ int i;
+ uint32_t rrr[5];
+
+ if (!result) {
+ return -EINVAL;
+ }
+
+ if ((recv_len = recv_buf(sfd, &res, sizeof(res))) <= 0) {
+ perror("recv");
+ return -errno;
+ } else {
+ memcpy(&rrr, &res, recv_len);
+ for (i = 0; i < recv_len/4; i++) {
+ fprintf(stderr, "%08x ", rrr[i]);
+ }
+ fprintf(stderr, "\n");
+ if ((recv_len == sizeof(res))
+ && (res.header.length == recv_len)
+ && (res.header.reserved == 0)
+ && (res.header.type == usbmux_result)
+ ) {
+ *result = res.result;
+ if (res.header.tag == tag) {
+ return 1;
+ } else {
+ return 0;
+ }
+ }
+ }
+
+ return -1;
+}
+
+void *run_stoc_loop(void *arg)
+{
+ struct client_data *cdata = (struct client_data*)arg;
+ int recv_len;
+ int sent;
+ char buffer[131072];
+
+ printf("%s: fd = %d\n", __func__, cdata->fd);
+
+ while (!stop_stoc && cdata->fd>0 && cdata->sfd>0) {
+ recv_len = recv_buf_timeout(cdata->sfd, buffer, sizeof(buffer), 0, 5000);
+ if (recv_len <= 0) {
+ if (recv_len == 0) {
+ // try again
+ continue;
+ } else {
+ fprintf(stderr, "recv failed: %s\n", strerror(errno));
+ break;
+ }
+ } else {
+ printf("received %d bytes from server\n", recv_len);
+ // send to socket
+ sent = send_buf(cdata->fd, buffer, recv_len);
+ if (sent < recv_len) {
+ if (sent <= 0) {
+ fprintf(stderr, "send failed: %s\n", strerror(errno));
+ break;
+ } else {
+ fprintf(stderr, "only sent %d from %d bytes\n", sent, recv_len);
+ }
+ } else {
+ // sending succeeded, receive from device
+ printf("pushed %d bytes to client\n", sent);
+ }
+ }
+ }
+ close(cdata->fd);
+ cdata->fd = -1;
+ stop_ctos = 1;
+
+ return NULL;
+}
+
+void *run_ctos_loop(void *arg)
+{
+ struct client_data *cdata = (struct client_data*)arg;
+ int recv_len;
+ int sent;
+ char buffer[131072];
+ pthread_t stoc = 0;
+
+ printf("%s: fd = %d\n", __func__, cdata->fd);
+
+ stop_stoc = 0;
+ pthread_create(&stoc, NULL, run_stoc_loop, cdata);
+
+ while (!stop_ctos && cdata->fd>0 && cdata->sfd>0) {
+ recv_len = recv_buf_timeout(cdata->fd, buffer, sizeof(buffer), 0, 5000);
+ if (recv_len <= 0) {
+ if (recv_len == 0) {
+ // try again
+ continue;
+ } else {
+ fprintf(stderr, "recv failed: %s\n", strerror(errno));
+ break;
+ }
+ } else {
+ printf("pulled %d bytes from client\n", recv_len);
+ // send to local socket
+ sent = send_buf(cdata->sfd, buffer, recv_len);
+ if (sent < recv_len) {
+ if (sent <= 0) {
+ fprintf(stderr, "send failed: %s\n", strerror(errno));
+ break;
+ } else {
+ fprintf(stderr, "only sent %d from %d bytes\n", sent, recv_len);
+ }
+ } else {
+ // sending succeeded, receive from device
+ printf("sent %d bytes to server\n", sent);
+ }
+ }
+ }
+ close(cdata->fd);
+ cdata->fd = -1;
+ stop_stoc = 1;
+
+ pthread_join(stoc, NULL);
+
+ return NULL;
+}
+
+int main(int argc, char **argv)
+{
+ int recv_len = 0;
+ int hello_done;
+ int connected;
+ uint32_t pktlen;
+ unsigned char *buf;
+ struct usbmux_header hello;
+ struct usbmux_dev_info device_info;
+ int sfd = -1;
+
+ if (argc != 3) {
+ printf("usage: %s LOCAL_PORT DEVICE_PORT\n", argv[0]);
+ return 0;
+ }
+
+ listen_port = atoi(argv[1]);
+ device_port = atoi(argv[2]);
+
+ if (!listen_port) {
+ fprintf(stderr, "Invalid listen_port specified!\n");
+ return -EINVAL;
+ }
+
+ if (!device_port) {
+ fprintf(stderr, "Invalid device_port specified!\n");
+ return -EINVAL;
+ }
+
+ sfd = connect_unix_socket(SOCKET_FILE);
+ if (sfd < 0) {
+ printf("error opening socket, terminating.\n");
+ return -1;
+ }
+
+ // send hello
+ hello.length = sizeof(struct usbmux_header);
+ hello.reserved = 0;
+ hello.type = usbmux_hello;
+ hello.tag = 2;
+
+ hello_done = 0;
+ connected = 0;
+
+ fprintf(stdout, "sending Hello packet\n");
+ if (send(sfd, &hello, hello.length, 0) == hello.length) {
+ uint32_t res = -1;
+ // get response
+ if (usbmuxd_get_result(sfd, hello.tag, &res) && (res==0)) {
+ fprintf(stdout, "Got Hello Response!\n");
+ hello_done = 1;
+ } else {
+ fprintf(stderr, "Did not get Hello response (with result=0)...\n");
+ close(sfd);
+ return -1;
+ }
+
+ device_info.device_id = 0;
+
+ if (hello_done) {
+ // get all devices
+ while (1) {
+ if (recv_buf_timeout(sfd, &pktlen, 4, MSG_PEEK, 1000) == 4) {
+ buf = (unsigned char*)malloc(pktlen);
+ if (!buf) {
+ exit(-ENOMEM);
+ }
+ recv_len = recv_buf(sfd, buf, pktlen);
+ if (recv_len < pktlen) {
+ fprintf(stdout, "received less data than specified in header!\n");
+ }
+ fprintf(stdout, "Received device data\n");
+ //log_debug_buffer(stdout, (char*)buf, pktlen);
+ memcpy(&device_info, buf + sizeof(struct usbmux_header), sizeof(device_info));
+ free(buf);
+ } else {
+ // we _should_ have all of them now.
+ // or perhaps an error occured.
+ break;
+ }
+ }
+ }
+
+ if (device_info.device_id > 0) {
+ struct usbmux_connect_request c_req;
+
+ fprintf(stdout, "Requesting connecion to device %d port %d\n", device_info.device_id, device_port);
+
+ // try to connect to last device found
+ c_req.header.length = sizeof(c_req);
+ c_req.header.reserved = 0;
+ c_req.header.type = usbmux_connect;
+ c_req.header.tag = 3;
+ c_req.device_id = device_info.device_id;
+ c_req.port = htons(device_port);
+ c_req.reserved = 0;
+
+ if (send_buf(sfd, &c_req, sizeof(c_req)) < 0) {
+ perror("send");
+ } else {
+ // read ACK
+ res = -1;
+ fprintf(stdout, "Reading connect result...\n");
+ if (usbmuxd_get_result(sfd, c_req.header.tag, &res)) {
+ if (res == 0) {
+ fprintf(stdout, "Connect success!\n");
+ connected = 1;
+ } else {
+ fprintf(stderr, "Connect failed, Error code=%d\n", res);
+ }
+ }
+ }
+ }
+
+ if (connected) {
+ int mysock = create_socket(listen_port);
+ if (mysock < 0) {
+ fprintf(stderr, "Error creating socket: %s\n", strerror(errno));
+ } else {
+ pthread_t ctos;
+ struct sockaddr_in c_addr;
+ socklen_t len = sizeof(struct sockaddr_in);
+ struct client_data cdata;
+ int c_sock;
+ while (1) {
+ printf("waiting for connection\n");
+ c_sock = accept(mysock, (struct sockaddr*)&c_addr, &len);
+ if (c_sock) {
+ printf("accepted connection, fd = %d\n", c_sock);
+ cdata.fd = c_sock;
+ cdata.sfd = sfd;
+ stop_ctos = 0;
+ pthread_create(&ctos, NULL, run_ctos_loop, &cdata);
+ pthread_join(ctos, NULL);
+ } else {
+ break;
+ }
+ }
+ close(c_sock);
+ close(mysock);
+ }
+ } else {
+ fprintf(stderr, "No attached device found?!\n");
+ }
+ }
+ close(sfd);
+
+ return 0;
+}
diff --git a/sock_stuff.c b/sock_stuff.c
new file mode 100644
index 0000000..1a23bc1
--- /dev/null
+++ b/sock_stuff.c
@@ -0,0 +1,277 @@
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include "sock_stuff.h"
+
+#define RECV_TIMEOUT 10000
+
+int create_unix_socket (const char *filename)
+{
+ struct sockaddr_un name;
+ int sock;
+ size_t size;
+
+ // remove if still present
+ unlink(filename);
+
+ /* Create the socket. */
+ sock = socket (PF_LOCAL, SOCK_STREAM, 0);
+ if (sock < 0) {
+ perror ("socket");
+ return -1;
+ }
+
+ /* Bind a name to the socket. */
+ name.sun_family = AF_LOCAL;
+ strncpy (name.sun_path, filename, sizeof (name.sun_path));
+ name.sun_path[sizeof (name.sun_path) - 1] = '\0';
+
+ /* The size of the address is
+ the offset of the start of the filename,
+ plus its length,
+ plus one for the terminating null byte.
+ Alternatively you can just do:
+ size = SUN_LEN (&name);
+ */
+ size = (offsetof (struct sockaddr_un, sun_path)
+ + strlen (name.sun_path) + 1);
+
+ if (bind (sock, (struct sockaddr *) &name, size) < 0) {
+ perror("bind");
+ close(sock);
+ return -1;
+ }
+
+ if (listen(sock, 10) < 0) {
+ perror("listen");
+ close(sock);
+ return -1;
+ }
+
+ return sock;
+}
+
+int connect_unix_socket(const char *filename)
+{
+ struct sockaddr_un name;
+ int sfd = -1;
+ size_t size;
+ struct stat fst;
+
+ // check if socket file exists...
+ if (stat(filename, &fst) != 0) {
+ fprintf(stderr, "%s: stat '%s': %s\n", __func__, filename, strerror(errno));
+ return -1;
+ }
+
+ // ... and if it is a unix domain socket
+ if (!S_ISSOCK(fst.st_mode)) {
+ fprintf(stderr, "%s: File '%s' is not a socket!\n", __func__, filename);
+ return -1;
+ }
+
+ // make a new socket
+ if ((sfd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
+ fprintf(stderr, "%s: socket: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ // and connect to 'filename'
+ name.sun_family = AF_LOCAL;
+ strncpy(name.sun_path, filename, sizeof(name.sun_path));
+ name.sun_path[sizeof(name.sun_path) - 1] = 0;
+
+ size = (offsetof (struct sockaddr_un, sun_path)
+ + strlen (name.sun_path) + 1);
+
+ if (connect(sfd, (struct sockaddr*)&name, size) < 0) {
+ close(sfd);
+ fprintf(stderr, "%s: connect: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ return sfd;
+}
+
+int create_socket(uint16_t port)
+{
+ int sfd = -1;
+ int yes = 1;
+ struct sockaddr_in saddr;
+
+ if ( 0 > ( sfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) ) ) {
+ perror("socket()");
+ return -1;
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ close(sfd);
+ return -1;
+ }
+
+ memset((void *)&saddr, 0, sizeof(saddr));
+ saddr.sin_family = AF_INET;
+ saddr.sin_addr.s_addr = htonl(INADDR_ANY);
+ saddr.sin_port = htons(port);
+
+ if(0 > bind(sfd, (struct sockaddr *)&saddr , sizeof(saddr))) {
+ perror("bind()");
+ close(sfd);
+ return -1;
+ }
+
+ if (listen(sfd, 1) == -1) {
+ perror("listen()");
+ close(sfd);
+ return -1;
+ }
+
+ return sfd;
+}
+
+int connect_socket(const char *addr, uint16_t port)
+{
+ int sfd = -1;
+ int yes = 1;
+ struct hostent *hp;
+ struct sockaddr_in saddr;
+
+ if (!addr) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((hp = gethostbyname(addr)) == NULL) {
+ fprintf(stderr, "%s: unknown host '%s'\n", __func__, addr);
+ return -1;
+ }
+
+ if (!hp->h_addr) {
+ fprintf(stderr, "%s: gethostbyname returned NULL address!\n", __func__);
+ return -1;
+ }
+
+ if ( 0 > ( sfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) ) ) {
+ perror("socket()");
+ return -1;
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ close(sfd);
+ return -1;
+ }
+
+ memset((void *)&saddr, 0, sizeof(saddr));
+ saddr.sin_family = AF_INET;
+ saddr.sin_addr.s_addr = (uint32_t)hp->h_addr;
+ saddr.sin_port = htons(port);
+
+ if (connect(sfd, (struct sockaddr*)&saddr, sizeof(saddr)) < 0) {
+ perror("connect");
+ close(sfd);
+ return -2;
+ }
+
+ return sfd;
+}
+
+int check_fd(int fd, fd_mode fdm, unsigned int timeout)
+{
+ fd_set fds;
+ int sret;
+ int eagain;
+ struct timeval to;
+
+ if (fd <= 0) {
+ fprintf(stderr, "ERROR: invalid fd in check_fd %d\n", fd);
+ return -1;
+ }
+
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+
+ to.tv_sec = (time_t)(timeout/1000);
+ to.tv_usec = (time_t)((timeout-(to.tv_sec*1000))*1000);
+
+ sret = -1;
+
+ do {
+ eagain = 0;
+ switch(fdm) {
+ case fdread:
+ sret = select(fd+1,&fds,NULL,NULL,&to);
+ break;
+ case fdwrite:
+ sret = select(fd+1,NULL,&fds,NULL,&to);
+ break;
+ case fdexcept:
+ sret = select(fd+1,NULL,NULL,&fds,&to);
+ break;
+ }
+
+ if (sret < 0) {
+ switch(errno) {
+ case EINTR:
+ // interrupt signal in select
+ fprintf(stderr, "%s: EINTR\n", __func__);
+ eagain = 1;
+ break;
+ case EAGAIN:
+ fprintf(stderr, "%s: EAGAIN\n", __func__);
+ break;
+ default:
+ fprintf(stderr, "%s: select failed: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+ }
+ } while (eagain);
+
+ return sret;
+}
+
+int recv_buf(int fd, void *data, size_t length)
+{
+ return recv_buf_timeout(fd, data, length, 0, RECV_TIMEOUT);
+}
+
+int peek_buf(int fd, void *data, size_t length)
+{
+ return recv_buf_timeout(fd, data, length, MSG_PEEK, RECV_TIMEOUT);
+}
+
+int recv_buf_timeout(int fd, void *data, size_t length, int flags, unsigned int timeout)
+{
+ int res;
+ int result;
+
+ // check if data is available
+ res = check_fd(fd, fdread, timeout);
+ if (res <= 0) {
+ return res;
+ }
+
+ // if we get here, there _is_ data available
+ result = recv(fd, data, length, flags);
+ if (res > 0 && result == 0) {
+ // but this is an error condition
+ fprintf(stderr, "%s: fd=%d\n", __func__, fd);
+ return -1;
+ }
+ return result;
+}
+
+int send_buf(int fd, void *data, size_t length)
+{
+ return send(fd, data, length, 0);
+}
+
diff --git a/sock_stuff.h b/sock_stuff.h
new file mode 100644
index 0000000..01082d1
--- /dev/null
+++ b/sock_stuff.h
@@ -0,0 +1,27 @@
+#ifndef __SOCK_STUFF_H
+#define __SOCK_STUFF_H
+
+#include <stdint.h>
+
+enum fd_mode
+{
+ fdread,
+ fdwrite,
+ fdexcept
+};
+typedef enum fd_mode fd_mode;
+
+int create_unix_socket(const char *filename);
+int connect_unix_socket(const char *filename);
+int create_socket(uint16_t port);
+int connect_socket(const char *addr, uint16_t port);
+int check_fd(int fd, fd_mode fdm, unsigned int timeout);
+
+int recv_buf(int fd, void *data, size_t size);
+int peek_buf(int fd, void *data, size_t size);
+int recv_buf_timeout(int fd, void *data, size_t size, int flags, unsigned int timeout);
+
+int send_buf(int fd, void *data, size_t size);
+
+#endif /* __SOCK_STUFF_H */
+
diff --git a/testclient.c b/testclient.c
new file mode 100644
index 0000000..fafbf23
--- /dev/null
+++ b/testclient.c
@@ -0,0 +1,148 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include "usbmuxd.h"
+#include "sock_stuff.h"
+
+#define SOCKET_FILE "/var/run/usbmuxd"
+
+int usbmuxd_get_result(int sfd, uint32_t tag, uint32_t *result)
+{
+ struct usbmux_result res;
+ int recv_len;
+
+ if (!result) {
+ return -EINVAL;
+ }
+
+ if ((recv_len = recv_buf(sfd, &res, sizeof(res))) <= 0) {
+ perror("recv");
+ return -errno;
+ } else {
+ if ((recv_len == sizeof(res))
+ && (res.header.length == recv_len)
+ && (res.header.reserved == 0)
+ && (res.header.type == usbmux_result)
+ ) {
+ *result = res.result;
+ if (res.header.tag == tag) {
+ return 1;
+ } else {
+ return 0;
+ }
+ }
+ }
+
+ return -1;
+}
+
+int main(int argc, char **argv)
+{
+ int sfd;
+ int recv_len = 0;
+ int hello_done;
+ int connected;
+ uint32_t pktlen;
+ unsigned char *buf;
+ struct usbmux_header hello;
+ struct usbmux_dev_info device_info;
+
+ sfd = connect_unix_socket(SOCKET_FILE);
+ if (sfd < 0) {
+ printf("error opening socket, terminating.\n");
+ return -1;
+ }
+
+ // send hello
+ hello.length = sizeof(struct usbmux_header);
+ hello.reserved = 0;
+ hello.type = usbmux_hello;
+ hello.tag = 2;
+
+ hello_done = 0;
+ connected = 0;
+
+ fprintf(stdout, "sending Hello packet\n");
+ if (send(sfd, &hello, hello.length, 0) == hello.length) {
+ uint32_t res = -1;
+ // get response
+ if (usbmuxd_get_result(sfd, hello.tag, &res) && (res==0)) {
+ fprintf(stdout, "Got Hello Response!\n");
+ hello_done = 1;
+ } else {
+ fprintf(stderr, "Did not get Hello response (with result=0)...\n");
+ close(sfd);
+ return -1;
+ }
+
+ device_info.device_id = 0;
+
+ if (hello_done) {
+ // get all devices
+ while (1) {
+ if (recv_buf_timeout(sfd, &pktlen, 4, MSG_PEEK, 1000) == 4) {
+ buf = (unsigned char*)malloc(pktlen);
+ if (!buf) {
+ exit(-ENOMEM);
+ }
+ recv_len = recv_buf(sfd, buf, pktlen);
+ if (recv_len < pktlen) {
+ fprintf(stdout, "received less data than specified in header!\n");
+ }
+ fprintf(stdout, "got device data:\n");
+ //log_debug_buffer(stdout, (char*)buf, pktlen);
+ memcpy(&device_info, buf + sizeof(struct usbmux_header), sizeof(device_info));
+ free(buf);
+ } else {
+ // we _should_ have all of them now.
+ // or perhaps an error occured.
+ break;
+ }
+ }
+ }
+
+ if (device_info.device_id > 0) {
+ struct usbmux_connect_request c_req;
+
+ // try to connect to last device found
+ c_req.header.length = sizeof(c_req);
+ c_req.header.reserved = 0;
+ c_req.header.type = usbmux_connect;
+ c_req.header.tag = 3;
+ c_req.device_id = device_info.device_id;
+ c_req.port = htons(22);
+ c_req.reserved = 0;
+
+ if (send_buf(sfd, &c_req, sizeof(c_req)) < 0) {
+ perror("send");
+ } else {
+ // read ACK
+ res = -1;
+ if (usbmuxd_get_result(sfd, c_req.header.tag, &res)) {
+ if (res == 0) {
+ fprintf(stdout, "Connect success!\n");
+ connected = 1;
+ } else {
+ fprintf(stderr, "Connect failed, Error code=%d\n", res);
+ }
+ }
+ }
+ }
+
+ if (connected) {
+
+
+ // do communication now.
+ sleep(10);
+ }
+ }
+ close(sfd);
+
+ return 0;
+}
diff --git a/usbmuxd.c b/usbmuxd.c
new file mode 100644
index 0000000..37a7f9e
--- /dev/null
+++ b/usbmuxd.c
@@ -0,0 +1,795 @@
+/*
+ * usbmuxd -- daemon for communication with iPhone/iPod via USB
+ *
+ * Copyright (c) 2009 Nikias Bassen. All Rights Reserved.
+ * Based upon iTunnel source code, Copyright (c) 2008 Jing Su.
+ * http://www.cs.toronto.edu/~jingsu/itunnel/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <signal.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <usb.h>
+
+#include "usbmuxd.h"
+#include "sock_stuff.h"
+
+#include "iphone.h"
+
+#define SOCKET_FILE "/var/run/usbmuxd"
+
+#define DEFAULT_TIMEOUT 4000
+#define DEFAULT_CHILDREN_CAPACITY 10
+
+static int quit_flag = 0;
+static int fsock = -1;
+
+struct client_data {
+ volatile int dead;
+ int socket;
+ int tag;
+ pthread_t thread;
+ pthread_t handler;
+ pthread_t reader;
+ int reader_quit;
+ int reader_dead;
+ int handler_dead;
+ iphone_umux_client_t muxclient;
+};
+
+struct device_use_info {
+ uint32_t device_id;
+ iphone_device_t phone;
+ int use_count;
+};
+
+static struct device_use_info **device_use_list = NULL;
+static int device_use_count = 0;
+static pthread_mutex_t usbmux_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static void print_buffer(const char *data, const int length)
+{
+ int i;
+ int j;
+ unsigned char c;
+
+ for(i=0; i<length; i+=16) {
+ printf("%04x: ", i);
+ for (j=0;j<16;j++) {
+ if (i+j >= length) {
+ printf(" ");
+ continue;
+ }
+ printf("%02hhx ", *(data+i+j));
+ }
+ printf(" | ");
+ for(j=0;j<16;j++) {
+ if (i+j >= length)
+ break;
+ c = *(data+i+j);
+ if ((c < 32) || (c > 127)) {
+ printf(".");
+ continue;
+ }
+ printf("%c", c);
+ }
+ printf("\n");
+ }
+ printf("\n");
+}
+
+static int usbmuxd_get_request(int fd, void *data, size_t len)
+{
+ uint32_t pktlen;
+ int recv_len;
+
+ if (peek_buf(fd, &pktlen, sizeof(pktlen)) < sizeof(pktlen)) {
+ return -errno;
+ }
+
+ if (len < pktlen) {
+ // target buffer is to small to hold this packet! fix it!
+ fprintf(stderr, "%s: WARNING -- packet (%d) is larger than target buffer (%d)! Truncating.\n", __func__, pktlen, len);
+ pktlen = len;
+ }
+
+ recv_len = recv_buf(fd, data, pktlen);
+ if (recv_len < pktlen) {
+ fprintf(stderr, "%s: Uh-oh, we got less than the packet's size, %d instead of %d...\n", __func__, recv_len, pktlen);
+ }
+
+ return recv_len;
+}
+
+static int usbmuxd_send_result(int fd, uint32_t tag, uint32_t result_code)
+{
+ struct usbmux_result res;
+
+ res.header.length = sizeof(res);
+ res.header.reserved = 0;
+ res.header.type = usbmux_result;
+ res.header.tag = tag;
+ res.result = result_code;
+
+ fprintf(stderr, "%s: tag=%d result=%d\n", __func__, res.header.tag, res.result);
+
+ return send_buf(fd, &res, sizeof(res));
+}
+
+/**
+ *
+ */
+static void *usbmuxd_client_reader_thread(void *arg)
+{
+ struct client_data *cdata;
+
+ char rbuffer[512];
+ uint32_t rbuffersize = 512;
+ uint32_t rlen;
+ iphone_error_t err;
+ char *cursor;
+ ssize_t len;
+ int result;
+
+ if (!arg) {
+ fprintf(stderr, "%s: invalid client_data supplied!\n", __func__);
+ cdata->reader_dead = 1;
+ return NULL;
+ }
+
+ cdata = (struct client_data*)arg;
+
+ cdata->reader_dead = 0;
+
+ fprintf(stdout, "%s: started\n", __func__);
+
+ while (!quit_flag && !cdata->reader_quit) {
+ result = check_fd(cdata->socket, fdwrite, DEFAULT_TIMEOUT);
+ if (result <= 0) {
+ if (result < 0) {
+ fprintf(stderr, "%s: select error: %s\n", __func__, strerror(errno));
+ }
+ continue;
+ }
+
+ rlen = 0;
+ err = iphone_mux_recv_timeout(cdata->muxclient, rbuffer, rbuffersize, &rlen, DEFAULT_TIMEOUT);
+ if (err != 0) {
+ fprintf(stderr, "%s: encountered USB read error: %d\n", __func__, err);
+ break;
+ }
+
+ cursor = rbuffer;
+ while (rlen > 0) {
+ //printf("%s: \n", __func__);
+ //print_buffer(cursor, rlen);
+ //if ((rlen > 4) && !cursor[3]) {
+ len = send_buf(cdata->socket, cursor, rlen);
+ /*} else if (cursor[0] == 1) {
+ fprintf(stderr, "%s: Error message received: %s\n", __func__, cursor+1);
+ // we got an error message and no data. don't send it.
+ // TODO parse the error code and put it in the right place!
+ len = rlen;
+ }*/
+ // calculate remainder
+ rlen -= len;
+ // advance cursor
+ cursor += len;
+ }
+ fsync(cdata->socket);
+ }
+
+ fprintf(stdout, "%s: terminated\n", __func__);
+
+ cdata->reader_dead = 1;
+
+ return NULL;
+}
+
+static int usbmuxd_handleConnectResult(struct client_data *cdata)
+{
+ int result;
+ char buffer[512];
+ char err_type[64];
+ int err_code;
+ ssize_t maxlen = 512;
+ uint32_t rlen;
+ iphone_error_t err;
+
+ // trigger connection attempt if ready to write to client
+ result = check_fd(cdata->socket, fdwrite, DEFAULT_TIMEOUT);
+ if (result <= 0) {
+ if (result < 0) {
+ fprintf(stderr, "%s: select error: %s\n", __func__, strerror(errno));
+ return result;
+ }
+ } else {
+ result = 0;
+ err = iphone_mux_recv_timeout(cdata->muxclient, buffer, maxlen, &rlen, DEFAULT_TIMEOUT);
+ if (err != 0) {
+ fprintf(stderr, "%s: encountered USB read error: %d\n", __func__, err);
+ usbmuxd_send_result(cdata->socket, cdata->tag, err);
+ } else {
+ if (rlen > 0) {
+ //print_buffer(buffer, rlen);
+ if ((buffer[0] == 1) && (rlen > 20) && !memcmp(buffer+1, "handleConnectResult:", 20)) {
+ // hm... we got an error message!
+ buffer[rlen] = 0;
+ fprintf(stderr, "%s: %s\n", __func__, buffer+22);
+
+ if (sscanf(buffer+22, "%s - %d\n", err_type, &err_code) == 2) {
+ usbmuxd_send_result(cdata->socket, cdata->tag, err_code);
+ } else {
+ usbmuxd_send_result(cdata->socket, cdata->tag, ENODATA);
+ }
+ return -2;
+ } else {
+ // send success result
+ usbmuxd_send_result(cdata->socket, cdata->tag, 0);
+ // and the server greeting message
+ send_buf(cdata->socket, buffer, rlen);
+ }
+ } else {
+ // no server greeting? this seems to be ok. send success.
+ usbmuxd_send_result(cdata->socket, cdata->tag, 0);
+ return 0;
+ }
+ }
+ //fsync(cdata->socket);
+ }
+ return 0;
+}
+
+/**
+ * This thread handles the communication between the connected iPhone/iPod
+ * and the client that created the connection.
+ */
+static void *usbmuxd_client_handler_thread(void *arg)
+{
+ struct client_data *cdata;
+ int result;
+ char *cursor;
+ char buffer[1024];
+ ssize_t len;
+ ssize_t maxlen = sizeof(buffer);
+ uint32_t wlen;
+ iphone_error_t err;
+
+ if (!arg) {
+ fprintf(stderr, "%s: invalid client_data provided!\n", __func__);
+ return NULL;
+ }
+
+ cdata = (struct client_data*)arg;
+
+ fprintf(stdout, "%s: started\n", __func__);
+
+ if (usbmuxd_handleConnectResult(cdata)) {
+ goto leave;
+ }
+
+ // starting mux reader thread
+ cdata->reader_quit = 0;
+ cdata->reader_dead = 0;
+ if (pthread_create(&cdata->reader, NULL, usbmuxd_client_reader_thread, cdata) != 0) {
+ fprintf(stderr, "%s: could not start client_reader thread\n", __func__);
+ cdata->reader = 0;
+ }
+
+ while (!quit_flag && !cdata->reader_dead) {
+ result = check_fd(cdata->socket, fdread, DEFAULT_TIMEOUT);
+ if (result <= 0) {
+ if (result < 0) {
+ fprintf(stderr, "%s: Error: checkfd: %s\n", __func__, strerror(errno));
+ }
+ continue;
+ }
+
+ // check_fd told us there's data available, so read from client
+ // and push to USB device.
+ len = recv(cdata->socket, buffer, maxlen, 0);
+ if (len == 0) {
+ break;
+ }
+ if (len < 0) {
+ fprintf(stderr, "%s: Error: recv: %s\n", __func__, strerror(errno));
+ break;
+ }
+
+ cursor = buffer;
+ do {
+ wlen = 0;
+ err = iphone_mux_send(cdata->muxclient, cursor, len, &wlen);
+ if (err == IPHONE_E_TIMEOUT) {
+ // some kind of timeout... just be patient and retry.
+ } else if (err != IPHONE_E_SUCCESS) {
+ fprintf(stderr, "%s: USB write error: %d\n", __func__, err);
+ len = -1;
+ break;
+ }
+
+ // calculate remainder.
+ len -= wlen;
+ // advance cursor appropiately.
+ cursor += wlen;
+ } while ((len > 0) && !quit_flag);
+ if (len < 0) {
+ break;
+ }
+ }
+
+leave:
+ // cleanup
+ fprintf(stdout, "%s: terminating\n", __func__);
+ if (cdata->reader != 0) {
+ cdata->reader_quit = 1;
+ pthread_join(cdata->reader, NULL);
+ }
+
+ cdata->handler_dead = 1;
+
+ fprintf(stdout, "%s: terminated\n", __func__);
+ return NULL;
+}
+
+/**
+ * This thread is started when a new connection is accepted.
+ * It performs the handshake, then waits for the connect packet and
+ * on success it starts the usbmuxd_client_handler thread.
+ */
+static void *usbmuxd_client_init_thread(void *arg)
+{
+ struct client_data *cdata;
+ struct usbmux_header hello;
+ struct usbmux_dev_info_request dev_info_req;
+ struct usbmux_connect_request c_req;
+
+ struct usb_bus *bus;
+ struct usb_device *dev;
+
+ int recv_len;
+ int found = 0;
+ int res;
+ int i;
+ int sent_result;
+ iphone_error_t err;
+
+ iphone_device_t phone;
+ struct device_use_info *cur_dev = NULL;
+
+ if (!arg) {
+ fprintf(stderr, "%s: invalid client_data provided!\n", __func__);
+ return NULL;
+ }
+
+ cdata = (struct client_data*)arg;
+ cdata->dead = 0;
+
+ fprintf(stdout, "%s: started (fd=%d)\n", __func__, cdata->socket);
+
+ if ((recv_len = usbmuxd_get_request(cdata->socket, &hello, sizeof(hello))) <= 0) {
+ fprintf(stderr, "%s: No Hello packet received, error %s\n", __func__, strerror(errno));
+ goto leave;
+ }
+
+ if ((recv_len == 16) && (hello.length == 16)
+ && (hello.reserved == 0) && (hello.type == usbmux_hello)) {
+ // send success response
+ usbmuxd_send_result(cdata->socket, hello.tag, 0);
+ } else {
+ // send error response and exit
+ fprintf(stderr, "%s: Invalid Hello packet received.\n", __func__);
+ // TODO is this required?!
+ usbmuxd_send_result(cdata->socket, hello.tag, EINVAL);
+ goto leave;
+ }
+
+ // gather data about all iPhones/iPods attached
+ usb_init();
+ usb_find_busses();
+ usb_find_devices();
+
+ for (bus = usb_get_busses(); bus; bus = bus->next) {
+ for (dev = bus->devices; dev; dev = dev->next) {
+ if (dev->descriptor.idVendor == 0x05ac
+ && dev->descriptor.idProduct >= 0x1290
+ && dev->descriptor.idProduct <= 0x1293)
+ {
+ fprintf(stdout, "%s: Found device on bus %d, id %d\n", __func__, bus->location, dev->devnum);
+ found++;
+
+ // construct packet
+ memset(&dev_info_req, 0, sizeof(dev_info_req));
+ dev_info_req.header.length = sizeof(dev_info_req);
+ dev_info_req.header.type = usbmux_device_info;
+ dev_info_req.dev_info.device_id = dev->devnum;
+ dev_info_req.dev_info.product_id = dev->descriptor.idProduct;
+ if (dev->descriptor.iSerialNumber) {
+ usb_dev_handle *udev;
+ //pthread_mutex_lock(&usbmux_mutex);
+ udev = usb_open(dev);
+ if (udev) {
+ usb_get_string_simple(udev, dev->descriptor.iSerialNumber, dev_info_req.dev_info.serial_number, sizeof(dev_info_req.dev_info.serial_number)+1);
+ usb_close(udev);
+ }
+ //pthread_mutex_unlock(&usbmux_mutex);
+ }
+
+ print_buffer((char*)&dev_info_req, sizeof(dev_info_req));
+
+ // send it
+ if (send_buf(cdata->socket, &dev_info_req, sizeof(dev_info_req)) <= 0) {
+ fprintf(stderr, "%s: Error: Could not send device info: %s\n", __func__, strerror(errno));
+ found--;
+ }
+ }
+ }
+ }
+
+ // now wait for connect request
+ if (found <= 0) {
+ fprintf(stderr, "%s: No attached iPhone/iPod devices found.\n", __func__);
+ goto leave;
+ }
+
+ memset(&c_req, 0, sizeof(c_req));
+ if ((recv_len = usbmuxd_get_request(cdata->socket, &c_req, sizeof(c_req))) <= 0) {
+ fprintf(stderr, "%s: Did not receive any connect request.\n", __func__);
+ goto leave;
+ }
+
+ if (c_req.header.type != usbmux_connect) {
+ fprintf(stderr, "%s: Unexpected packet of type %d received.\n", __func__, c_req.header.type);
+ goto leave;
+ }
+
+ fprintf(stdout, "%s: Setting up connection to usb device #%d on port %d\n", __func__, c_req.device_id, ntohs(c_req.port));
+
+ // find the device, and open usb connection
+ phone = NULL;
+ cur_dev = NULL;
+ // first check if we already have an open connection
+ if (device_use_list) {
+ pthread_mutex_lock(&usbmux_mutex);
+ for (i = 0; i < device_use_count; i++) {
+ if (device_use_list[i]) {
+ if (device_use_list[i]->device_id == c_req.device_id) {
+ device_use_list[i]->use_count++;
+ cur_dev = device_use_list[i];
+ phone = cur_dev->phone;
+ break;
+ }
+ }
+ }
+ pthread_mutex_unlock(&usbmux_mutex);
+ }
+ if (!phone) {
+ // if not found, make a new connection
+ if (iphone_get_specific_device(0, c_req.device_id, &phone) != IPHONE_E_SUCCESS) {
+ fprintf(stderr, "%s: device_id %d could not be opened\n", __func__, c_req.device_id);
+ usbmuxd_send_result(cdata->socket, c_req.header.tag, ENODEV);
+ goto leave;
+ }
+ // add to device list
+ cur_dev = (struct device_use_info*)malloc(sizeof(struct device_use_info));
+ memset(cur_dev, 0, sizeof(struct device_use_info));
+ cur_dev->use_count = 1;
+ cur_dev->device_id = c_req.device_id;
+ cur_dev->phone = phone;
+
+ pthread_mutex_lock(&usbmux_mutex);
+ device_use_list = (struct device_use_info**)realloc(device_use_list, sizeof(struct device_use_info*) * (device_use_count+1));
+ if (device_use_list) {
+ device_use_list[device_use_count] = cur_dev;
+ device_use_count++;
+ }
+ pthread_mutex_unlock(&usbmux_mutex);
+ } else {
+ fprintf(stdout, "%s: reusing usb connection device_id %d\n", __func__, c_req.device_id);
+ }
+
+ // setup connection to iPhone/iPod
+// pthread_mutex_lock(&usbmux_mutex);
+ res = iphone_mux_new_client(cur_dev->phone, 0, ntohs(c_req.port), &(cdata->muxclient));
+// pthread_mutex_unlock(&usbmux_mutex);
+
+ if (res != 0) {
+ usbmuxd_send_result(cdata->socket, c_req.header.tag, res);
+ fprintf(stderr, "%s: mux_new_client returned %d, aborting.\n", __func__, res);
+ goto leave;
+ }
+
+ // start connection handler thread
+ cdata->handler_dead = 0;
+ cdata->tag = c_req.header.tag;
+ if (pthread_create(&cdata->handler, NULL, usbmuxd_client_handler_thread, cdata) != 0) {
+ fprintf(stderr, "%s: could not create usbmuxd_client_handler_thread!\n", __func__);
+ cdata->handler = 0;
+ goto leave;
+ }
+
+ sent_result = 0;
+
+ // start reading data from the connected device
+ while (!quit_flag && !cdata->handler_dead) {
+ iphone_mux_pullbulk(cur_dev->phone);
+ err = iphone_mux_get_error(cdata->muxclient);
+ if (err != IPHONE_E_SUCCESS) {
+ break;
+ /*} else if (!sent_result) {
+ usbmuxd_send_result(cdata->socket, c_req.header.tag, 0);
+ sent_result = 1;*/
+ }
+ }
+
+ if (!sent_result) {
+ //fprintf(stderr, "Sending error message %d tag %d\n", err, c_req.header.tag);
+ err = iphone_mux_get_error(cdata->muxclient);
+ //usbmuxd_send_result(cdata->socket, c_req.header.tag, err);
+ }
+
+ fprintf(stdout, "%s: terminating\n", __func__);
+
+ // wait for handler thread to finish its work
+ if (cdata->handler != 0) {
+ pthread_join(cdata->handler, NULL);
+ }
+
+ // time to clean up
+ if (cdata && cdata->muxclient) { // should be non-NULL
+ iphone_mux_free_client(cdata->muxclient);
+ }
+
+leave:
+ // this has to be freed only if it's not in use anymore as it closes
+ // the USB connection
+ if (cur_dev) {
+ if (cur_dev->use_count > 1) {
+ cur_dev->use_count--;
+ } else {
+ iphone_free_device(cur_dev->phone);
+ cur_dev->use_count = 0;
+ free(cur_dev);
+ cur_dev = NULL;
+ pthread_mutex_lock(&usbmux_mutex);
+ if (device_use_count > 1) {
+ struct device_use_info **newlist;
+ int j;
+
+ newlist = (struct device_use_info**)malloc(sizeof(struct device_use_info*) * device_use_count-1);
+ for (i = 0; i < device_use_count; i++) {
+ if (device_use_list[i] != NULL) {
+ newlist[j++] = device_use_list[i];
+ }
+ }
+ free(device_use_list);
+ device_use_list = newlist;
+ } else {
+ free(device_use_list);
+ device_use_list = NULL;
+ }
+ pthread_mutex_unlock(&usbmux_mutex);
+ }
+ }
+
+ cdata->dead = 1;
+
+ fprintf(stdout, "%s: terminated\n", __func__);
+
+ return NULL;
+}
+
+/**
+ * make this program run detached from the current console
+ */
+static int daemonize()
+{
+ // TODO still to be implemented, also logging is missing!
+ return 0;
+}
+
+/**
+ * signal handler function for cleaning up stuff
+ */
+static void clean_exit(int sig)
+{
+ if (sig == SIGINT) {
+ fprintf(stdout, "CTRL+C pressed\n");
+ }
+ quit_flag = 1;
+}
+
+/**
+ * thread function that performs accept() and starts the required child
+ * threads to perform the rest of the communication stuff.
+ */
+static void *usbmuxd_accept_thread(void *arg)
+{
+ struct sockaddr_un c_addr;
+ socklen_t len = sizeof(struct sockaddr_un);
+ struct client_data *cdata;
+ struct client_data **children = NULL;
+ int children_capacity = DEFAULT_CHILDREN_CAPACITY;
+ int i = 0;
+ int result = 0;
+ int cnt;
+
+ // Reserve space for 10 clients which should be enough. If not, the
+ // buffer gets enlarged later.
+ children = (struct client_data**)malloc(sizeof(struct client_data*) * children_capacity);
+ if (!children) {
+ fprintf(stderr, "%s: Out of memory when allocating memory for child threads. Terminating.\n", __func__);
+ exit(EXIT_FAILURE);
+ }
+ memset(children, 0, sizeof(struct client_data*) * children_capacity);
+
+ fprintf(stdout, "%s: waiting for connection\n", __func__);
+ while (!quit_flag) {
+ // Check the file descriptor before accepting a connection.
+ // If no connection attempt is made, just repeat...
+ result = check_fd(fsock, fdread, DEFAULT_TIMEOUT);
+ if (result <= 0) {
+ if (result == 0) {
+ // cleanup
+ for (i = 0; i < children_capacity; i++) {
+ if (children[i]) {
+ if (children[i]->dead != 0) {
+ pthread_join(children[i]->thread, NULL);
+ fprintf(stdout, "%s: reclaimed client thread (fd=%d)\n", __func__, children[i]->socket);
+ free(children[i]);
+ children[i] = NULL;
+ cnt++;
+ } else {
+ cnt = 0;
+ }
+ } else {
+ cnt++;
+ }
+ }
+
+ if ((children_capacity > DEFAULT_CHILDREN_CAPACITY)
+ && ((children_capacity - cnt) <= DEFAULT_CHILDREN_CAPACITY)) {
+ children_capacity = DEFAULT_CHILDREN_CAPACITY;
+ children = realloc(children, sizeof(struct client_data*) * children_capacity);
+ }
+ continue;
+ } else {
+ fprintf(stderr, "select error: %s\n", strerror(errno));
+ continue;
+ }
+ }
+
+ cdata = (struct client_data*)malloc(sizeof(struct client_data));
+ memset(cdata, 0, sizeof(struct client_data));
+ if (!cdata) {
+ quit_flag = 1;
+ fprintf(stderr, "%s: Error: Out of memory! Terminating.\n", __func__);
+ break;
+ }
+
+ cdata->socket = accept(fsock, (struct sockaddr*)&c_addr, &len);
+ if (cdata->socket < 0) {
+ free(cdata);
+ if (errno == EINTR) {
+ continue;
+ } else {
+ fprintf(stderr, "%s: Error in accept: %s\n", __func__, strerror(errno));
+ continue;
+ }
+ }
+
+ fprintf(stdout, "%s: new client connected (fd=%d)\n", __func__, cdata->socket);
+
+ // create client thread:
+ if (pthread_create(&cdata->thread, NULL, usbmuxd_client_init_thread, cdata) == 0) {
+ for (i = 0; i < children_capacity; i++) {
+ if (children[i] == NULL) break;
+ }
+ if (i == children_capacity) {
+ // enlarge buffer
+ children_capacity++;
+ children = realloc(children, sizeof(struct client_data*) * children_capacity);
+ if (!children) {
+ fprintf(stderr, "%s: Out of memory when enlarging child thread buffer\n", __func__);
+ }
+ }
+ children[i] = cdata;
+ } else {
+ fprintf(stderr, "%s: Failed to create client_init_thread.\n", __func__);
+ close(cdata->socket);
+ free(cdata);
+ cdata = NULL;
+ }
+ }
+
+ fprintf(stdout, "%s: terminating\n", __func__);
+
+ // preparing for shutdown: wait for child threads to terminate (if any)
+ fprintf(stdout, "%s: waiting for child threads to terminate...\n", __func__);
+ for (i = 0; i < children_capacity; i++) {
+ if (children[i] != NULL) {
+ pthread_join(children[i]->thread, NULL);
+ free(children[i]);
+ }
+ }
+
+ // delete the children set.
+ free(children);
+ children = NULL;
+
+ fprintf(stdout, "%s: terminated.\n", __func__);
+
+ return NULL;
+}
+
+int main(int argc, char **argv)
+{
+ int foreground = 1;
+ pthread_t acceptor;
+
+ fprintf(stdout, "usbmuxd: starting\n");
+
+ // TODO: Parameter checking.
+
+ fsock = create_unix_socket(SOCKET_FILE);
+ if (fsock < 0) {
+ fprintf(stderr, "Could not create socket, exiting\n");
+ return -1;
+ }
+
+ chmod(SOCKET_FILE, 0666);
+
+ if (!foreground) {
+ if (daemonize() < 0) {
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ // signal(SIGHUP, reload_conf); // none yet
+ signal(SIGINT, clean_exit);
+ signal(SIGQUIT, clean_exit);
+ signal(SIGTERM, clean_exit);
+ signal(SIGPIPE, SIG_IGN);
+
+ if (pthread_create(&acceptor, NULL, usbmuxd_accept_thread, NULL) != 0) {
+ fprintf(stderr, "Failed to create server thread.\n");
+ close(fsock);
+ return -1;
+ }
+
+ // Relax here. Just wait for the accept thread to terminate.
+ pthread_join(acceptor, NULL);
+
+ fprintf(stdout, "usbmuxd: terminating\n");
+ if (fsock >= 0) {
+ close(fsock);
+ }
+
+ unlink(SOCKET_FILE);
+
+ return 0;
+}
+
diff --git a/usbmuxd.h b/usbmuxd.h
new file mode 100644
index 0000000..fcbee52
--- /dev/null
+++ b/usbmuxd.h
@@ -0,0 +1,44 @@
+#ifndef __USBMUXD_H
+#define __USBMUXD_H
+
+#include <stdint.h>
+
+struct usbmux_header {
+ uint32_t length; // length of message, including header
+ uint32_t reserved; // always zero
+ uint32_t type; // message type
+ uint32_t tag; // responses to this query will echo back this tag
+};
+
+struct usbmux_result {
+ struct usbmux_header header;
+ uint32_t result;
+};
+
+struct usbmux_connect_request {
+ struct usbmux_header header;
+ uint32_t device_id;
+ uint16_t port; // TCP port number
+ uint16_t reserved; // set to zero
+};
+
+struct usbmux_dev_info {
+ uint32_t device_id;
+ uint16_t product_id;
+ char serial_number[40];
+};
+
+struct usbmux_dev_info_request {
+ struct usbmux_header header;
+ struct usbmux_dev_info dev_info;
+ unsigned char padding[222];
+};
+
+enum {
+ usbmux_result = 1,
+ usbmux_connect = 2,
+ usbmux_hello = 3,
+ usbmux_device_info = 4,
+};
+
+#endif