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authorGravatar Martin Szulecki2013-05-23 14:14:48 +0200
committerGravatar Martin Szulecki2013-05-23 14:14:48 +0200
commit06d2399461182e0c0c113fb473902e204117641e (patch)
treea246259839027fbf1cf5064a1a6c8c132bdce70e /src/syslog_relay.c
parentc68121961226dcce52ad38daced6ad848555849e (diff)
downloadlibimobiledevice-06d2399461182e0c0c113fb473902e204117641e.tar.gz
libimobiledevice-06d2399461182e0c0c113fb473902e204117641e.tar.bz2
Add protocol implementation for syslog_relay service
Diffstat (limited to 'src/syslog_relay.c')
-rw-r--r--src/syslog_relay.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/src/syslog_relay.c b/src/syslog_relay.c
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--- /dev/null
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+/*
+ * syslog_relay.c
+ * com.apple.syslog_relay service implementation.
+ *
+ * Copyright (c) 2013 Martin Szulecki 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
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <string.h>
+#include <stdlib.h>
+
+#include "syslog_relay.h"
+#include "lockdown.h"
+#include "common/debug.h"
+
+struct syslog_relay_worker_thread {
+ syslog_relay_client_t client;
+ syslog_relay_receive_cb_t cbfunc;
+ void *user_data;
+};
+
+/**
+ * Convert a service_error_t value to a syslog_relay_error_t value.
+ * Used internally to get correct error codes.
+ *
+ * @param err An service_error_t error code
+ *
+ * @return A matching syslog_relay_error_t error code,
+ * SYSLOG_RELAY_E_UNKNOWN_ERROR otherwise.
+ */
+static syslog_relay_error_t syslog_relay_error(service_error_t err)
+{
+ switch (err) {
+ case SERVICE_E_SUCCESS:
+ return SYSLOG_RELAY_E_SUCCESS;
+ case SERVICE_E_INVALID_ARG:
+ return SYSLOG_RELAY_E_INVALID_ARG;
+ case SERVICE_E_MUX_ERROR:
+ return SYSLOG_RELAY_E_MUX_ERROR;
+ case SERVICE_E_SSL_ERROR:
+ return SYSLOG_RELAY_E_SSL_ERROR;
+ default:
+ break;
+ }
+ return SYSLOG_RELAY_E_UNKNOWN_ERROR;
+}
+
+/**
+ * Connects to the syslog_relay service on the specified device.
+ *
+ * @param device The device to connect to.
+ * @param service The service descriptor returned by lockdownd_start_service.
+ * @param client Pointer that will point to a newly allocated
+ * syslog_relay_client_t upon successful return. Must be freed using
+ * syslog_relay_client_free() after use.
+ *
+ * @return SYSLOG_RELAY_E_SUCCESS on success, SYSLOG_RELAY_E_INVALID_ARG when
+ * client is NULL, or an SYSLOG_RELAY_E_* error code otherwise.
+ */
+syslog_relay_error_t syslog_relay_client_new(idevice_t device, lockdownd_service_descriptor_t service, syslog_relay_client_t * client)
+{
+ *client = NULL;
+
+ if (!device || !service || service->port == 0 || !client || *client) {
+ debug_info("Incorrect parameter passed to syslog_relay_client_new.");
+ return SYSLOG_RELAY_E_INVALID_ARG;
+ }
+
+ debug_info("Creating syslog_relay_client, port = %d.", service->port);
+
+ service_client_t parent = NULL;
+ syslog_relay_error_t ret = syslog_relay_error(service_client_new(device, service, &parent));
+ if (ret != SYSLOG_RELAY_E_SUCCESS) {
+ debug_info("Creating base service client failed. Error: %i", ret);
+ return ret;
+ }
+
+ syslog_relay_client_t client_loc = (syslog_relay_client_t) malloc(sizeof(struct syslog_relay_client_private));
+ client_loc->parent = parent;
+ client_loc->worker = (thread_t)NULL;
+
+ *client = client_loc;
+
+ debug_info("syslog_relay_client successfully created.");
+ return 0;
+}
+
+/**
+ * Starts a new syslog_relay service on the specified device and connects to it.
+ *
+ * @param device The device to connect to.
+ * @param client Pointer that will point to a newly allocated
+ * syslog_relay_client_t upon successful return. Must be freed using
+ * syslog_relay_client_free() after use.
+ * @param label The label to use for communication. Usually the program name.
+ * Pass NULL to disable sending the label in requests to lockdownd.
+ *
+ * @return SYSLOG_RELAY_E_SUCCESS on success, or an SYSLOG_RELAY_E_* error
+ * code otherwise.
+ */
+syslog_relay_error_t syslog_relay_client_start_service(idevice_t device, syslog_relay_client_t * client, const char* label)
+{
+ syslog_relay_error_t err = SYSLOG_RELAY_E_UNKNOWN_ERROR;
+ service_client_factory_start_service(device, SYSLOG_RELAY_SERVICE_NAME, (void**)client, label, SERVICE_CONSTRUCTOR(syslog_relay_client_new), &err);
+ return err;
+}
+
+/**
+ * Disconnects a syslog_relay client from the device and frees up the
+ * syslog_relay client data.
+ *
+ * @param client The syslog_relay client to disconnect and free.
+ *
+ * @return SYSLOG_RELAY_E_SUCCESS on success, SYSLOG_RELAY_E_INVALID_ARG when
+ * client is NULL, or an SYSLOG_RELAY_E_* error code otherwise.
+ */
+syslog_relay_error_t syslog_relay_client_free(syslog_relay_client_t client)
+{
+ if (!client)
+ return SYSLOG_RELAY_E_INVALID_ARG;
+
+ syslog_relay_error_t err = syslog_relay_error(service_client_free(client->parent));
+ client->parent = NULL;
+ if (client->worker) {
+ debug_info("Joining syslog capture callback worker thread");
+ thread_join(client->worker);
+ }
+ free(client);
+
+ return err;
+}
+
+/**
+ * Sends data to the service.
+ *
+ * @param client The syslog_relay client
+ * @param data Data to send
+ * @param size Size of the data to send
+ * @param sent Number of bytes sent (can be NULL to ignore)
+ *
+ * @return SYSLOG_RELAY_E_SUCCESS on success,
+ * SYSLOG_RELAY_E_INVALID_ARG when client or plist is NULL
+ */
+syslog_relay_error_t syslog_relay_send(syslog_relay_client_t client, const char* data, uint32_t size, uint32_t *sent)
+{
+ syslog_relay_error_t res = SYSLOG_RELAY_E_UNKNOWN_ERROR;
+ int bytes = 0;
+
+ if (!client || !data || (size == 0)) {
+ return SYSLOG_RELAY_E_INVALID_ARG;
+ }
+
+ res = syslog_relay_error(service_send(client->parent, data, size, (uint32_t*)&bytes));
+ if (bytes <= 0) {
+ debug_info("ERROR: sending to device failed.");
+ }
+ if (sent) {
+ *sent = (uint32_t)bytes;
+ }
+
+ return res;
+}
+
+/**
+ * Receives data from the service.
+ *
+ * @param client The syslog_relay client
+ * @param data Buffer that will be filled with the data received
+ * @param size Number of bytes to receive
+ * @param received Number of bytes received (can be NULL to ignore)
+ * @param timeout Maximum time in milliseconds to wait for data.
+ *
+ * @return SYSLOG_RELAY_E_SUCCESS on success,
+ * SYSLOG_RELAY_E_INVALID_ARG when client or plist is NULL
+ */
+syslog_relay_error_t syslog_relay_receive(syslog_relay_client_t client, char* data, uint32_t size, uint32_t *received)
+{
+ return syslog_relay_receive_with_timeout(client, data, size, received, 1000);
+}
+
+/**
+ * Receives data using the given syslog_relay client with specified timeout.
+ *
+ * @param client The syslog_relay client to use for receiving
+ * @param data Buffer that will be filled with the data received
+ * @param size Number of bytes to receive
+ * @param received Number of bytes received (can be NULL to ignore)
+ * @param timeout Maximum time in milliseconds to wait for data.
+ *
+ * @return SYSLOG_RELAY_E_SUCCESS on success,
+ * SYSLOG_RELAY_E_INVALID_ARG when one or more parameters are
+ * invalid, SYSLOG_RELAY_E_MUX_ERROR when a communication error
+ * occurs, or SYSLOG_RELAY_E_UNKNOWN_ERROR when an unspecified
+ * error occurs.
+ */
+syslog_relay_error_t syslog_relay_receive_with_timeout(syslog_relay_client_t client, char* data, uint32_t size, uint32_t *received, unsigned int timeout)
+{
+ syslog_relay_error_t res = SYSLOG_RELAY_E_UNKNOWN_ERROR;
+ int bytes = 0;
+
+ if (!client || !data || (size == 0)) {
+ return SYSLOG_RELAY_E_INVALID_ARG;
+ }
+
+ res = syslog_relay_error(service_receive_with_timeout(client->parent, data, size, (uint32_t*)&bytes, timeout));
+ if (bytes <= 0) {
+ debug_info("Could not read data, error %d", res);
+ }
+ if (received) {
+ *received = (uint32_t)bytes;
+ }
+
+ return res;
+}
+
+void *syslog_relay_worker(void *arg)
+{
+ service_error_t ret = SERVICE_E_UNKNOWN_ERROR;
+ struct syslog_relay_worker_thread *srwt = (struct syslog_relay_worker_thread*)arg;
+
+ if (!srwt)
+ return NULL;
+
+ debug_info("Running");
+
+ while (srwt->client->parent) {
+ char c;
+ uint32_t bytes = 0;
+ ret = syslog_relay_receive_with_timeout(srwt->client, &c, 1, &bytes, 0);
+ if (ret < 0 || (bytes != 1)) {
+ debug_info("Connection to syslog relay interrupted");
+ break;
+ }
+ if(c != 0) {
+ srwt->cbfunc(c, srwt->user_data);
+ }
+ }
+
+ if (srwt) {
+ free(srwt);
+ }
+
+ debug_info("Exiting");
+
+ return NULL;
+}
+
+syslog_relay_error_t syslog_relay_start_capture(syslog_relay_client_t client, syslog_relay_receive_cb_t callback, void* user_data)
+{
+ if (!client || !callback)
+ return SYSLOG_RELAY_E_INVALID_ARG;
+
+ syslog_relay_error_t res = SYSLOG_RELAY_E_UNKNOWN_ERROR;
+
+ if (client->worker) {
+ debug_info("Another syslog capture thread appears to be running already.");
+ return res;
+ }
+
+ /* start worker thread */
+ struct syslog_relay_worker_thread *srwt = (struct syslog_relay_worker_thread*)malloc(sizeof(struct syslog_relay_worker_thread));
+ if (srwt) {
+ srwt->client = client;
+ srwt->cbfunc = callback;
+ srwt->user_data = user_data;
+
+ if (thread_create(&client->worker, syslog_relay_worker, srwt) == 0) {
+ res = SYSLOG_RELAY_E_SUCCESS;
+ }
+ }
+
+ return res;
+}
+
+syslog_relay_error_t syslog_relay_stop_capture(syslog_relay_client_t client)
+{
+ if (client->worker) {
+ /* notify thread to finish */
+ service_client_t parent = client->parent;
+ client->parent = NULL;
+ /* join thread to make it exit */
+ thread_join(client->worker);
+ client->worker = (thread_t)NULL;
+ client->parent = parent;
+ }
+
+ return SYSLOG_RELAY_E_SUCCESS;
+} \ No newline at end of file