Installation Instructions ************************* Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. This file is free documentation; the Free Software Foundation gives unlimited permission to copy, distribute and modify it. Basic Installation ================== Briefly, the shell commands `./configure; make; make install' should configure, build, and install this package. The following more-detailed instructions are generic; see the `README' file for instructions specific to this package. The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. It may also create one or more `.h' files containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, and a file `config.log' containing compiler output (useful mainly for debugging `configure'). It can also use an optional file (typically called `config.cache' and enabled with `--cache-file=config.cache' or simply `-C') that saves the results of its tests to speed up reconfiguring. Caching is disabled by default to prevent problems with accidental use of stale cache files. If you need to do unusual things to compile the package, please try to figure out how `configure' could check whether to do them, and mail diffs or instructions to the address given in the `README' so they can be considered for the next release. If you are using the cache, and at some point `config.cache' contains results you don't want to keep, you may remove or edit it. The file `configure.ac' (or `configure.in') is used to create `configure' by a program called `autoconf'. You need `configure.ac' if you want to change it or regenerate `configure' using a newer version of `autoconf'. The simplest way to compile this package is: 1. `cd' to the directory containing the package's source code and type `./configure' to configure the package for your system. Running `configure' might take a while. While running, it prints some messages telling which features it is checking for. 2. Type `make' to compile the package. 3. Optionally, type `make check' to run any self-tests that come with the package. 4. Type `make install' to install the programs and any data files and documentation. 5. You can remove the program binaries and object files from the source code directory by typing `make clean'. To also remove the files that `configure' created (so you can compile the package for a different kind of computer), type `make distclean'. There is also a `make maintainer-clean' target, but that is intended mainly for the package's developers. If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution. 6. Often, you can also type `make uninstall' to remove the installed files again. Compilers and Options ===================== Some systems require unusual options for compilation or linking that the `configure' script does not know about. Run `./configure --help' for details on some of the pertinent environment variables. You can give `configure' initial values for configuration parameters by setting variables in the command line or in the environment. Here is an example: ./configure CC=c99 CFLAGS=-g LIBS=-lposix *Note Defining Variables::, for more details. Compiling For Multiple Architectures ==================================== You can compile the package for more than one kind of computer at the same time, by placing the object files for each architecture in their own directory. To do this, you can use GNU `make'. `cd' to the directory where you want the object files and executables to go and run the `configure' script. `configure' automatically checks for the source code in the directory that `configure' is in and in `..'. With a non-GNU `make', it is safer to compile the package for one architecture at a time in the source code directory. After you have installed the package for one architecture, use `make distclean' before reconfiguring for another architecture. Installation Names ================== By default, `make install' installs the package's commands under `/usr/local/bin', include files under `/usr/local/include', etc. You can specify an installation prefix other than `/usr/local' by giving `configure' the option `--prefix=PREFIX'. You can specify separate installation prefixes for architecture-specific files and architecture-independent files. If you pass the option `--exec-prefix=PREFIX' to `configure', the package uses PREFIX as the prefix for installing programs and libraries. Documentation and other data files still use the regular prefix. In addition, if you use an unusual directory layout you can give options like `--bindir=DIR' to specify different values for particular kinds of files. Run `configure --help' for a list of the directories you can set and what kinds of files go in them. If the package supports it, you can cause programs to be installed with an extra prefix or suffix on their names by giving `configure' the option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. Optional Features ================= Some packages pay attention to `--enable-FEATURE' options to `configure', where FEATURE indicates an optional part of the package. They may also pay attention to `--with-PACKAGE' options, where PACKAGE is something like `gnu-as' or `x' (for the X Window System). The `README' should mention any `--enable-' and `--with-' options that the package recognizes. For packages that use the X Window System, `configure' can usually find the X include and library files automatically, but if it doesn't, you can use the `configure' options `--x-includes=DIR' and `--x-libraries=DIR' to specify their locations. Specifying the System Type ========================== There may be some features `configure' cannot figure out automatically, but needs to determine by the type of machine the package will run on. Usually, assuming the package is built to be run on the _same_ architectures, `configure' can figure that out, but if it prints a message saying it cannot guess the machine type, give it the `--build=TYPE' option. TYPE can either be a short name for the system type, such as `sun4', or a canonical name which has the form: CPU-COMPANY-SYSTEM where SYSTEM can have one of these forms: OS KERNEL-OS See the file `config.sub' for the possible values of each field. If `config.sub' isn't included in this package, then this package doesn't need to know the machine type. If you are _building_ compiler tools for cross-compiling, you should use the option `--target=TYPE' to select the type of system they will produce code for. If you want to _use_ a cross compiler, that generates code for a platform different from the build platform, you should specify the "host" platform (i.e., that on which the generated programs will eventually be run) with `--host=TYPE'. Sharing Defaults ================ If you want to set default values for `configure' scripts to share, you can create a site shell script called `config.site' that gives default values for variables like `CC', `cache_file', and `prefix'. `configure' looks for `PREFIX/share/config.site' if it exists, then `PREFIX/etc/config.site' if it exists. Or, you can set the `CONFIG_SITE' environment variable to the location of the site script. A warning: not all `configure' scripts look for a site script. Defining Variables ================== Variables not defined in a site shell script can be set in the environment passed to `configure'. However, some packages may run configure again during the build, and the customized values of these variables may be lost. In order to avoid this problem, you should set them in the `configure' command line, using `VAR=value'. For example: ./configure CC=/usr/local2/bin/gcc causes the specified `gcc' to be used as the C compiler (unless it is overridden in the site shell script). Unfortunately, this technique does not work for `CONFIG_SHELL' due to an Autoconf bug. Until the bug is fixed you can use this workaround: CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of the options to `configure', and exit. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. To suppress all normal output, redirect it to `/dev/null' (any error messages will still be shown). `--srcdir=DIR' Look for the package's source code in directory DIR. Usually `configure' can determine that directory automatically. `configure' also accepts some other, not widely useful, options. Run `configure --help' for more details. n176'>176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 
/*
    en50221 encoder An implementation for libdvb
    an implementation for the en50221 transport layer

    Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com>
    Copyright (C) 2005 Julian Scheel (julian at jusst dot de)
    Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)

    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 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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
*/

#include <string.h>
#include <libdvbmisc/dvbmisc.h>
#include <pthread.h>
#include <libucsi/endianops.h>
#include "en50221_app_rm.h"
#include "en50221_app_tags.h"
#include "asn_1.h"

struct en50221_app_rm {
	struct en50221_app_send_functions *funcs;

	en50221_app_rm_enq_callback enqcallback;
	void *enqcallback_arg;

	en50221_app_rm_reply_callback replycallback;
	void *replycallback_arg;

	en50221_app_rm_changed_callback changedcallback;
	void *changedcallback_arg;

	pthread_mutex_t lock;
};

static int en50221_app_rm_parse_profile_enq(struct en50221_app_rm *rm,
					    uint8_t slot_id,
					    uint16_t session_number,
					    uint8_t * data,
					    uint32_t data_length);
static int en50221_app_rm_parse_profile_reply(struct en50221_app_rm *rm,
					      uint8_t slot_id,
					      uint16_t session_number,
					      uint8_t * data,
					      uint32_t data_length);
static int en50221_app_rm_parse_profile_change(struct en50221_app_rm *rm,
					       uint8_t slot_id,
					       uint16_t session_number,
					       uint8_t * data,
					       uint32_t data_length);


struct en50221_app_rm *en50221_app_rm_create(struct
					     en50221_app_send_functions
					     *funcs)
{
	struct en50221_app_rm *rm = NULL;

	// create structure and set it up
	rm = malloc(sizeof(struct en50221_app_rm));
	if (rm == NULL) {
		return NULL;
	}
	rm->funcs = funcs;
	rm->enqcallback = NULL;
	rm->replycallback = NULL;
	rm->changedcallback = NULL;

	pthread_mutex_init(&rm->lock, NULL);

	// done
	return rm;
}

void en50221_app_rm_destroy(struct en50221_app_rm *rm)
{
	pthread_mutex_destroy(&rm->lock);
	free(rm);
}

void en50221_app_rm_register_enq_callback(struct en50221_app_rm *rm,
					  en50221_app_rm_enq_callback
					  callback, void *arg)
{
	pthread_mutex_lock(&rm->lock);
	rm->enqcallback = callback;
	rm->enqcallback_arg = arg;
	pthread_mutex_unlock(&rm->lock);
}

void en50221_app_rm_register_reply_callback(struct en50221_app_rm *rm,
					    en50221_app_rm_reply_callback
					    callback, void *arg)
{
	pthread_mutex_lock(&rm->lock);
	rm->replycallback = callback;
	rm->replycallback_arg = arg;
	pthread_mutex_unlock(&rm->lock);
}

void en50221_app_rm_register_changed_callback(struct en50221_app_rm *rm,
					      en50221_app_rm_changed_callback
					      callback, void *arg)
{
	pthread_mutex_lock(&rm->lock);
	rm->changedcallback = callback;
	rm->changedcallback_arg = arg;
	pthread_mutex_unlock(&rm->lock);
}

int en50221_app_rm_enq(struct en50221_app_rm *rm, uint16_t session_number)
{
	uint8_t buf[4];

	// set up the tag
	buf[0] = (TAG_PROFILE_ENQUIRY >> 16) & 0xFF;
	buf[1] = (TAG_PROFILE_ENQUIRY >> 8) & 0xFF;
	buf[2] = TAG_PROFILE_ENQUIRY & 0xFF;
	buf[3] = 0;

	// create the data and send it
	return rm->funcs->send_data(rm->funcs->arg, session_number, buf, 4);
}

int en50221_app_rm_reply(struct en50221_app_rm *rm,
			 uint16_t session_number,
			 uint32_t resource_id_count,
			 uint32_t * resource_ids)
{
	uint8_t buf[10];

	// set up the tag
	buf[0] = (TAG_PROFILE >> 16) & 0xFF;
	buf[1] = (TAG_PROFILE >> 8) & 0xFF;
	buf[2] = TAG_PROFILE & 0xFF;

	// encode the length field
	int length_field_len;
	if ((length_field_len = asn_1_encode(resource_id_count * 4, buf + 3, 3)) < 0) {
		return -1;
	}
	// copy the data and byteswap it
	uint32_t *copy_resource_ids = alloca(4 * resource_id_count);
	if (copy_resource_ids == NULL) {
		return -1;
	}
	uint8_t *data = (uint8_t *) copy_resource_ids;
	memcpy(data, resource_ids, resource_id_count * 4);
	uint32_t i;
	for (i = 0; i < resource_id_count; i++) {
		bswap32(data);
		data += 4;
	}

	// build the iovecs
	struct iovec iov[2];
	iov[0].iov_base = buf;
	iov[0].iov_len = 3 + length_field_len;
	iov[1].iov_base = (uint8_t *) copy_resource_ids;
	iov[1].iov_len = resource_id_count * 4;

	// create the data and send it
	return rm->funcs->send_datav(rm->funcs->arg, session_number, iov, 2);
}

int en50221_app_rm_changed(struct en50221_app_rm *rm,
			   uint16_t session_number)
{
	uint8_t buf[4];

	// set up the tag
	buf[0] = (TAG_PROFILE_CHANGE >> 16) & 0xFF;
	buf[1] = (TAG_PROFILE_CHANGE >> 8) & 0xFF;
	buf[2] = TAG_PROFILE_CHANGE & 0xFF;
	buf[3] = 0;

	// create the data and send it
	return rm->funcs->send_data(rm->funcs->arg, session_number, buf, 4);
}

int en50221_app_rm_message(struct en50221_app_rm *rm,
			   uint8_t slot_id,
			   uint16_t session_number,
			   uint32_t resource_id,
			   uint8_t * data, uint32_t data_length)
{
	(void) resource_id;

	// get the tag
	if (data_length < 3) {
		print(LOG_LEVEL, ERROR, 1, "Received short data\n");
		return -1;
	}
	uint32_t tag = (data[0] << 16) | (data[1] << 8) | data[2];

	// dispatch it
	switch (tag) {
	case TAG_PROFILE_ENQUIRY:
		return en50221_app_rm_parse_profile_enq(rm, slot_id,
							session_number,
							data + 3,
							data_length - 3);
	case TAG_PROFILE:
		return en50221_app_rm_parse_profile_reply(rm, slot_id,
							  session_number,
							  data + 3,
							  data_length - 3);
	case TAG_PROFILE_CHANGE:
		return en50221_app_rm_parse_profile_change(rm, slot_id,
							   session_number,
							   data + 3,
							   data_length - 3);
	}

	print(LOG_LEVEL, ERROR, 1, "Received unexpected tag %x\n", tag);
	return -1;
}


static int en50221_app_rm_parse_profile_enq(struct en50221_app_rm *rm,
					    uint8_t slot_id,
					    uint16_t session_number,
					    uint8_t * data,
					    uint32_t data_length)
{
	(void) data;
	(void) data_length;

	pthread_mutex_lock(&rm->lock);
	en50221_app_rm_enq_callback cb = rm->enqcallback;
	void *cb_arg = rm->enqcallback_arg;
	pthread_mutex_unlock(&rm->lock);
	if (cb) {
		return cb(cb_arg, slot_id, session_number);
	}
	return 0;
}

static int en50221_app_rm_parse_profile_reply(struct en50221_app_rm *rm,
					      uint8_t slot_id,
					      uint16_t session_number,
					      uint8_t * data,
					      uint32_t data_length)
{
	// first of all, decode the length field
	uint16_t asn_data_length;
	int length_field_len;
	if ((length_field_len = asn_1_decode(&asn_data_length, data, data_length)) < 0) {
		print(LOG_LEVEL, ERROR, 1, "ASN.1 decode error\n");
		return -1;
	}
	// check it
	if (asn_data_length > (data_length - length_field_len)) {
		print(LOG_LEVEL, ERROR, 1, "Received short data\n");
		return -1;
	}
	uint32_t resources_count = asn_data_length / 4;
	uint32_t *resource_ids = (uint32_t *) (data + length_field_len);
	data += length_field_len;

	// byteswap it
	uint32_t i;
	for (i = 0; i < resources_count; i++) {
		bswap32(data);
		data += 4;
	}

	// inform observer
	pthread_mutex_lock(&rm->lock);
	en50221_app_rm_reply_callback cb = rm->replycallback;
	void *cb_arg = rm->replycallback_arg;
	pthread_mutex_unlock(&rm->lock);
	if (cb) {
		return cb(cb_arg, slot_id, session_number, resources_count, resource_ids);
	}
	return 0;
}

static int en50221_app_rm_parse_profile_change(struct en50221_app_rm *rm,
					       uint8_t slot_id,
					       uint16_t session_number,
					       uint8_t * data,
					       uint32_t data_length)
{
	(void) data;
	(void) data_length;

	pthread_mutex_lock(&rm->lock);
	en50221_app_rm_changed_callback cb = rm->changedcallback;
	void *cb_arg = rm->changedcallback_arg;
	pthread_mutex_unlock(&rm->lock);
	if (cb) {
		return cb(cb_arg, slot_id, session_number);
	}
	return 0;
}