/*
 * Copyright (c) 2010-2022 Belledonne Communications SARL.
 *
 * This file is part of Liblinphone
 * (see https://gitlab.linphone.org/BC/public/liblinphone).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

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

#define MAX_LEN 16384

#include "bctoolbox/charconv.h"
#include "bctoolbox/vfs.h"
#include "belle-sip/object.h"
#include "xml2lpc.h"
#include <bctoolbox/defs.h>

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if !defined(_WIN32_WCE)
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#if _MSC_VER
#include <io.h>
#endif
#endif /*_WIN32_WCE*/

#ifdef _MSC_VER
#ifdef LINPHONE_WINDOWS_DESKTOP
#include <Shlwapi.h>
#else
#include <stdlib.h>
#endif
#else
#include <libgen.h>
#endif

#ifdef _WIN32
#define RENAME_REQUIRES_NONEXISTENT_NEW_PATH 1
#endif

#define lp_new0(type, n) (type *)calloc(n, sizeof(type))

#include "linphone/lpconfig.h"
#include "lpc2xml.h"

#include "c-wrapper/c-wrapper.h"
#include "core/paths/paths.h"

typedef struct _LpItem {
	char *key;
	char *value;
	int is_comment;
	bool_t overwrite; // If set to true, will add overwrite=true when converted to xml
	bool_t skip;      // If set to true, won't be dumped when converted to xml
} LpItem;

typedef struct _LpSectionParam {
	char *key;
	char *value;
} LpSectionParam;

typedef struct _LpSection {
	char *name;
	bctbx_list_t *items;
	bctbx_list_t *params;
	bool_t overwrite; // If set to true, will add overwrite=true to all items of this section when converted to xml
	bool_t skip;      // If set to true, won't be dumped when converted to xml
} LpSection;

struct _LpConfig {
	belle_sip_object_t base;
	bctbx_vfs_file_t *pFile;
	char *filename;
	char *tmpfilename;
	char *factory_filename;
	bctbx_list_t *sections;
	bctbx_vfs_t *g_bctbx_vfs;
	bool_t modified;
	bool_t readonly;
	bool_t abort_sync;
};

static bool_t simulate_read_failure;

BELLE_SIP_DECLARE_NO_IMPLEMENTED_INTERFACES(LinphoneConfig);
BELLE_SIP_DECLARE_VPTR_NO_EXPORT(LinphoneConfig);

#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif

char *lp_realpath(const char *file, char *name) {
#if defined(_WIN32) || defined(__QNX__) || defined(__ANDROID__)
	return ms_strdup(file);
#else
	char *output = realpath(file, name);
	char *msoutput = ms_strdup(output);
	free(output);
	return msoutput;
#endif
}

LpItem *lp_item_new(const char *key, const char *value) {
	LpItem *item = lp_new0(LpItem, 1);
	item->key = ortp_strdup(key);
	item->value = ortp_strdup(value);
	return item;
}

LpItem *lp_comment_new(const char *comment) {
	LpItem *item = lp_new0(LpItem, 1);
	char *pos = NULL;
	item->value = ortp_strdup(comment);

	pos = strchr(item->value, '\r');
	if (pos == NULL) pos = strchr(item->value, '\n');

	if (pos) {
		*pos = '\0'; /*replace the '\n' */
	}
	item->is_comment = TRUE;
	return item;
}

LpSectionParam *lp_section_param_new(const char *key, const char *value) {
	LpSectionParam *param = lp_new0(LpSectionParam, 1);
	param->key = ortp_strdup(key);
	param->value = ortp_strdup(value);
	return param;
}

LpSection *lp_section_new(const char *name) {
	LpSection *sec = lp_new0(LpSection, 1);
	sec->name = ortp_strdup(name);
	return sec;
}

void lp_item_destroy(void *pitem) {
	LpItem *item = (LpItem *)pitem;
	if (item->key) ortp_free(item->key);
	ortp_free(item->value);
	free(item);
}

void lp_section_param_destroy(void *section_param) {
	LpSectionParam *param = (LpSectionParam *)section_param;
	ortp_free(param->key);
	ortp_free(param->value);
	free(param);
}

void lp_section_destroy(LpSection *sec) {
	ortp_free(sec->name);
	bctbx_list_for_each(sec->items, lp_item_destroy);
	bctbx_list_for_each(sec->params, lp_section_param_destroy);
	bctbx_list_free(sec->items);
	free(sec);
}

void lp_section_add_item(LpSection *sec, LpItem *item) {
	sec->items = bctbx_list_append(sec->items, (void *)item);
}

void linphone_config_add_section(LpConfig *lpconfig, LpSection *section) {
	lpconfig->sections = bctbx_list_append(lpconfig->sections, (void *)section);
}

void linphone_config_add_section_param(LpSection *section, LpSectionParam *param) {
	section->params = bctbx_list_append(section->params, (void *)param);
}

void linphone_config_remove_section(LpConfig *lpconfig, LpSection *section) {
	lpconfig->sections = bctbx_list_remove(lpconfig->sections, (void *)section);
	lp_section_destroy(section);
}

void lp_section_remove_item(LpSection *sec, LpItem *item) {
	sec->items = bctbx_list_remove(sec->items, (void *)item);
	lp_item_destroy(item);
}

static bool_t is_first_char(const char *start, const char *pos) {
	const char *p;
	for (p = start; p < pos; p++) {
		if (*p != ' ') return FALSE;
	}
	return TRUE;
}

static int is_a_comment(const char *str) {
	while (*str == ' ') {
		str++;
	}
	if (*str == '#') return 1;
	return 0;
}

LpSection *linphone_config_find_section(const LpConfig *lpconfig, const char *name) {
	LpSection *sec;
	bctbx_list_t *elem = lpconfig->sections;
	/*printf("Looking for section %s\n",name);*/
	for (; elem != NULL; elem = bctbx_list_next(elem)) {
		sec = (LpSection *)elem->data;
		if (strcmp(sec->name, name) == 0) {
			/*printf("Section %s found\n",name);*/
			return sec;
		}
	}
	return NULL;
}

LpSectionParam *lp_section_find_param(const LpSection *sec, const char *key) {
	bctbx_list_t *elem;
	LpSectionParam *param;
	for (elem = sec->params; elem != NULL; elem = bctbx_list_next(elem)) {
		param = (LpSectionParam *)elem->data;
		if (strcmp(param->key, key) == 0) {
			return param;
		}
	}
	return NULL;
}

LpItem *lp_section_find_comment(const LpSection *sec, const char *comment) {
	bctbx_list_t *elem;
	LpItem *item;
	/*printf("Looking for item %s\n",name);*/
	for (elem = sec->items; elem != NULL; elem = bctbx_list_next(elem)) {
		item = (LpItem *)elem->data;
		if (item->is_comment && strcmp(item->value, comment) == 0) {
			/*printf("Item %s found\n",name);*/
			return item;
		}
	}
	return NULL;
}

LpItem *lp_section_find_item(const LpSection *sec, const char *name) {
	bctbx_list_t *elem;
	LpItem *item;
	/*printf("Looking for item %s\n",name);*/
	for (elem = sec->items; elem != NULL; elem = bctbx_list_next(elem)) {
		item = (LpItem *)elem->data;
		if (!item->is_comment && strcmp(item->key, name) == 0) {
			/*printf("Item %s found\n",name);*/
			return item;
		}
	}
	return NULL;
}

bctbx_list_t *lp_section_get_items(const LpSection *sec) {
	bctbx_list_t *items = NULL;
	bctbx_list_t *elem;
	LpItem *item;
	/*printf("Looking for item %s\n",name);*/
	for (elem = sec->items; elem != NULL; elem = bctbx_list_next(elem)) {
		item = (LpItem *)elem->data;
		if (!item->is_comment) {
			/*printf("Item %s found\n",name);*/
			items = bctbx_list_append(items, item);
		}
	}
	return items;
}

static LpSection *linphone_config_parse_line(LpConfig *lpconfig, char *line, LpSection *cur) {
	LpSectionParam *params = NULL;
	char *pos1, *pos2;
	int nbs;
	size_t size = strlen(line) + 1;
	char *secname = reinterpret_cast<char *>(ms_malloc(size));
	char *key = reinterpret_cast<char *>(ms_malloc(size));
	char *value = reinterpret_cast<char *>(ms_malloc(size));
	LpItem *item;

	pos1 = strchr(line, '[');
	if (pos1 != NULL && is_first_char(line, pos1)) {
		pos2 = strchr(pos1, ']');
		if (pos2 != NULL) {
			secname[0] = '\0';
			/* found section */
			*pos2 = '\0';
			nbs = sscanf(pos1 + 1, "%s", secname);
			if (nbs >= 1) {
				if (strlen(secname) > 0) {
					cur = linphone_config_find_section(lpconfig, secname);
					if (cur == NULL) {
						cur = lp_section_new(secname);
						linphone_config_add_section(lpconfig, cur);
					}

					if (pos2 > pos1 + 1 + strlen(secname)) {
						/* found at least one section param */
						pos2 = pos1 + 1 + strlen(secname) + 1; // Remove the white space after the secname
						pos1 = strchr(pos2, '=');
						while (pos1 != NULL) {
							/* for each section param */
							key[0] = '\0';
							value[0] = '\0';
							*pos1 = ' ';
							if (sscanf(pos2, "%s %s", key, value) == 2) {
								params = lp_section_param_new(key, value);
								linphone_config_add_section_param(cur, params);

								pos2 += strlen(key) + strlen(value) +
								        2; // Remove the = sign + the white space after each param
								pos1 = strchr(pos2, '=');
							} else {
								ms_warning("parse section params error !");
								pos1 = NULL;
							}
						}
					}
				}
			} else {
				ms_warning("parse error!");
			}
		}
	} else {
		if (is_a_comment(line)) {
			if (cur) {
				LpItem *comment = lp_comment_new(line);
				item = lp_section_find_comment(cur, comment->value);
				if (item != NULL) {
					lp_section_remove_item(cur, item);
				}
				lp_section_add_item(cur, comment);
			}
		} else {
			pos1 = strchr(line, '=');
			if (pos1 != NULL) {
				key[0] = '\0';

				*pos1 = '\0';
				if (sscanf(line, "%s", key) > 0) {

					pos1++;
					pos2 = strchr(pos1, '\r');
					if (pos2 == NULL) pos2 = strchr(pos1, '\n');
					if (pos2 == NULL) pos2 = pos1 + strlen(pos1);
					else {
						*pos2 = '\0'; /*replace the '\n' */
					}
					/* remove ending white spaces */
					for (; pos2 > pos1 && pos2[-1] == ' '; pos2--)
						pos2[-1] = '\0';

					if (pos2 - pos1 > 0) {
						/* found a pair key,value */

						if (cur != NULL) {
							item = lp_section_find_item(cur, key);
							if (item == NULL) {
								lp_section_add_item(cur, lp_item_new(key, pos1));
							} else {
								ortp_free(item->value);
								item->value = ortp_strdup(pos1);
							}
							/*ms_message("Found %s=%s",key,pos1);*/
						} else {
							ms_warning("found key,item but no sections");
						}
					}
				}
			}
		}
	}
	ms_free(key);
	ms_free(value);
	ms_free(secname);
	return cur;
}

int linphone_config_parse(LpConfig *lpconfig, bctbx_vfs_file_t *pFile) {
	char tmp[MAX_LEN] = {'\0'};
	LpSection *current_section = NULL;
	int size = 0;
	int total_size = 0;
	if (pFile == NULL) return -1;
	while ((size = bctbx_file_get_nxtline(pFile, tmp, MAX_LEN)) > 0) {
		// tmp[size] = '\0';
		current_section = linphone_config_parse_line(lpconfig, tmp, current_section);
		total_size += size;
	}
	return total_size;
}

LpConfig *linphone_config_new(const char *filename) {
	return linphone_config_new_with_factory(filename, NULL);
}

static void _linphone_config_init_from_buffer(LinphoneConfig *conf, const char *buffer) {
	LpSection *current_section = NULL;

	char *ptr = ms_strdup(buffer);
	char *strtok_storage = NULL;
	char *line = strtok_r(ptr, "\n", &strtok_storage);

	while (line != NULL) {
		current_section = linphone_config_parse_line(conf, line, current_section);
		line = strtok_r(NULL, "\n", &strtok_storage);
	}

	ms_free(ptr);
}

void _linphone_config_apply_factory_config(LpConfig *config) {
	if (config->factory_filename) linphone_config_read_file(config, config->factory_filename);
}

LpConfig *linphone_config_new_from_buffer(const char *buffer) {
	LpConfig *conf = belle_sip_object_new(LinphoneConfig);
	_linphone_config_init_from_buffer(conf, buffer);
	return conf;
}

static int _linphone_config_init_from_files(LinphoneConfig *lpconfig, const char *config_filename) {
	bool_t file_exists = FALSE;
	bool_t tmp_file_exists = FALSE;
	lpconfig->g_bctbx_vfs = bctbx_vfs_get_default();

	if (config_filename != NULL && config_filename[0] != '\0') {
		if (bctbx_file_exist(config_filename) == 0) {
			file_exists = TRUE;
			lpconfig->filename = lp_realpath(config_filename, NULL);
			if (lpconfig->filename == NULL) {
				ms_error("Could not find the real path of %s: %s", config_filename, strerror(errno));
				goto fail;
			}
		} else {
			lpconfig->filename = ms_strdup(config_filename);
		}
		lpconfig->tmpfilename = ortp_strdup_printf("%s.tmp", lpconfig->filename);
		ms_message("Using (r/w) config information from %s", lpconfig->filename);
		tmp_file_exists = (bctbx_file_exist(lpconfig->tmpfilename) == 0);

		if (file_exists && tmp_file_exists) {
			ms_warning("Found temporary file %s: a crash probably occured during the last write of the config file.",
			           lpconfig->tmpfilename);
		}

#if !defined(_WIN32)
		{
			struct stat fileStat;
			if ((stat(lpconfig->filename, &fileStat) == 0) && (S_ISREG(fileStat.st_mode))) {
				/* make existing configuration files non-group/world-accessible */
				if (chmod(lpconfig->filename, S_IRUSR | S_IWUSR) == -1) {
					ms_warning("unable to correct permissions on "
					           "configuration file: %s",
					           strerror(errno));
				}
			}
		}
#endif /*_WIN32*/

		/*open with r+ to check if we can write on it later*/
		if (!simulate_read_failure) {
			if (file_exists) lpconfig->pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, lpconfig->filename, "r+");
			if (lpconfig->pFile == NULL && tmp_file_exists) {
				lpconfig->pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, lpconfig->tmpfilename, "r");
				if (lpconfig->pFile != NULL) {
					ms_warning("Could not open %s but %s works, app may have crashed during last sync.",
					           lpconfig->filename, lpconfig->tmpfilename);
				}
			}
		} else {
			ms_warning("Simulating a read failure.");
		}
		if (lpconfig->pFile != NULL) {
			int parsed_size = linphone_config_parse(lpconfig, lpconfig->pFile);
			bctbx_file_close(lpconfig->pFile);
			lpconfig->pFile = NULL;
			lpconfig->modified = FALSE;
			if (parsed_size <= 0) {
				ms_error("No parsed content from configuration file, parsed_size=[%i]", parsed_size);
			}
		} else if (file_exists || tmp_file_exists) {
			ms_error("File [%s] exists but cannot be opened ! ", lpconfig->filename);
			/* This is a major failure: throw an error as it is dangerous to go further.
			 * We take the risk that later linphone_config_sync() writes an empty file. */
			goto fail;
		}
	}
	_linphone_config_apply_factory_config(lpconfig);
	return 0;

fail:
	return -1;
}

LpConfig *linphone_config_new_with_factory(const char *config_filename, const char *factory_config_filename) {
	LpConfig *lpconfig = belle_sip_object_new(LinphoneConfig);
	if (factory_config_filename && strcmp(factory_config_filename, "") != 0)
		lpconfig->factory_filename = bctbx_strdup(factory_config_filename);
	if (_linphone_config_init_from_files(lpconfig, config_filename) == 0) {
		return lpconfig;
	} else {
		belle_sip_object_unref(lpconfig);
		return NULL;
	}
}

LpConfig *
linphone_config_new_for_shared_core(const char *app_group_id, const char *config_filename, const char *factory_path) {
	std::string path = LinphonePrivate::Paths::getPath(LinphonePrivate::Paths::Config,
	                                                   const_cast<void *>(static_cast<const void *>(app_group_id)));
	path = path + "/" + config_filename;
	return linphone_config_new_with_factory(path.c_str(), factory_path);
}

const char *linphone_config_get_filename(const LinphoneConfig *config) {
	return config->filename;
}

const char *linphone_config_get_factory_filename(const LinphoneConfig *config) {
	return config->factory_filename;
}

const char *linphone_config_get_temporary_filename(const LinphoneConfig *config) {
	return config->tmpfilename;
}

LinphoneStatus linphone_config_read_file(LpConfig *lpconfig, const char *filename) {
	char *path = lp_realpath(filename, NULL);
	bctbx_vfs_file_t *pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, path, "r");
	if (pFile != NULL) {
		ms_message("Reading config information from %s", path);
		linphone_config_parse(lpconfig, pFile);
		bctbx_file_close(pFile);
		ms_free(path);
		return 0;
	}
	ms_warning("Fail to open file %s", path);
	ms_free(path);
	return -1;
}

#ifdef HAVE_XML2

static const char *empty_xml = "empty provisioning file";
static const char *xml_to_lpc_failed = "xml to lpc failed";
static const char *invalid_xml = "invalid xml";

static const char *_linphone_config_xml_convert(LpConfig *lpc, xml2lpc_context *context, int result) {
	const char *error_msg = NULL;
	if (result == 0) {
		result = xml2lpc_convert(context, lpc);
		if (result == 0) {
			// if the remote provisioning added a proxy config and none was set before, set it
			if (linphone_config_has_section(lpc, "proxy_0") &&
			    linphone_config_get_int(lpc, "sip", "default_proxy", -1) == -1) {
				linphone_config_set_int(lpc, "sip", "default_proxy", 0);
			}
			linphone_config_sync(lpc);
		} else {
			error_msg = xml_to_lpc_failed;
		}
	} else {
		error_msg = invalid_xml;
	}
	return error_msg;
}

const char *linphone_config_load_from_xml_file(LinphoneConfig *lpc, const char *filename) {
	xml2lpc_context *context = NULL;
	char *path = lp_realpath(filename, NULL);
	const char *error_msg = NULL;

	if (path) {
		context = xml2lpc_context_new(NULL, NULL);
		error_msg = _linphone_config_xml_convert(lpc, context, xml2lpc_set_xml_file(context, path));
		bctbx_free(path);
	}
	if (context) xml2lpc_context_destroy(context);
	return error_msg;
}

static void xml2lpc_callback(BCTBX_UNUSED(void *ctx), xml2lpc_log_level level, const char *fmt, va_list list) {
	BctbxLogLevel bctbx_level;
	switch (level) {
		case XML2LPC_DEBUG:
			bctbx_level = BCTBX_LOG_DEBUG;
			break;
		case XML2LPC_MESSAGE:
			bctbx_level = BCTBX_LOG_MESSAGE;
			break;
		case XML2LPC_WARNING:
			bctbx_level = BCTBX_LOG_WARNING;
			break;
		case XML2LPC_ERROR:
		default:
			bctbx_level = BCTBX_LOG_ERROR;
			break;
	}
	bctbx_logv(BCTBX_LOG_DOMAIN, bctbx_level, fmt, list);
}

#else

const char *linphone_config_load_from_xml_file(LinphoneConfig *lpc, const char *filename) {
	ms_warning("linphone_config_load_from_xml_file(): stubbed.");
	return "No libxml2 support";
}

#endif

const char *_linphone_config_load_from_xml_string(LpConfig *lpc, const char *buffer) {
	const char *error_msg = NULL;
#ifdef HAVE_XML2
	xml2lpc_context *context = NULL;

	if (buffer != NULL) {
		context = xml2lpc_context_new(xml2lpc_callback, NULL);
		error_msg = _linphone_config_xml_convert(lpc, context, xml2lpc_set_xml_string(context, buffer));
	} else {
		error_msg = empty_xml;
	}
	if (context) xml2lpc_context_destroy(context);
#else
	error_msg = "No libxml2 support";
	ms_warning("_linphone_config_load_from_xml_string(): stubbed.");
#endif
	return error_msg;
}

LinphoneStatus linphone_config_load_from_xml_string(LpConfig *lpc, const char *buffer) {
	const char *status;
	if ((status = _linphone_config_load_from_xml_string(lpc, buffer))) {
		ms_error("%s", status);
		return -1;
	} else return 0;
}

void lp_item_set_value(LpItem *item, const char *value) {
	if (item->value != value) {
		char *prev_value = item->value;
		item->value = ortp_strdup(value);
		ortp_free(prev_value);
	}
}

static void _linphone_config_uninit(LpConfig *lpconfig) {
	if (lpconfig->filename != NULL) ortp_free(lpconfig->filename);
	if (lpconfig->tmpfilename) ortp_free(lpconfig->tmpfilename);
	if (lpconfig->factory_filename) bctbx_free(lpconfig->factory_filename);
	if (lpconfig->sections) bctbx_list_free_with_data(lpconfig->sections, (bctbx_list_free_func)lp_section_destroy);
}

LpConfig *linphone_config_ref(LpConfig *lpconfig) {
	return (LinphoneConfig *)belle_sip_object_ref(BELLE_SIP_OBJECT(lpconfig));
}

void linphone_config_unref(LpConfig *lpconfig) {
	belle_sip_object_unref(BELLE_SIP_OBJECT(lpconfig));
}

void linphone_config_destroy(LpConfig *lpconfig) {
	linphone_config_unref(lpconfig);
}

const char *linphone_config_get_section_param_string(const LpConfig *lpconfig,
                                                     const char *section,
                                                     const char *key,
                                                     const char *default_value) {
	LpSection *sec;
	LpSectionParam *param;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		param = lp_section_find_param(sec, key);
		if (param != NULL) return param->value;
	}
	return default_value;
}

const char *
linphone_config_get_string(const LpConfig *lpconfig, const char *section, const char *key, const char *default_string) {
	LpSection *sec;
	LpItem *item;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) return item->value;
	}
	return default_string;
}

bctbx_list_t *linphone_config_get_string_list(const LpConfig *lpconfig,
                                              const char *section,
                                              const char *key,
                                              bctbx_list_t *default_list) {
	LpItem *item;
	LpSection *sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) {
			bctbx_list_t *l = NULL;
			char *str;
			char *ptr;
			str = ptr = ms_strdup(item->value);
			while (ptr != NULL) {
				char *next = strstr(ptr, ",");
				if (next != NULL) {
					*(next++) = '\0';
				}
				l = bctbx_list_append(l, ms_strdup(ptr));
				ptr = next;
			}
			ms_free(str);
			return l;
		}
	}
	return default_list;
}

bool_t linphone_config_get_range(const LpConfig *lpconfig,
                                 const char *section,
                                 const char *key,
                                 int *min,
                                 int *max,
                                 int default_min,
                                 int default_max) {
	const char *str = linphone_config_get_string(lpconfig, section, key, NULL);
	if (str != NULL) {
		const char *minusptr = strchr(str, '-');
		if ((minusptr == NULL) || (minusptr == str)) {
			*min = default_min;
			*max = default_max;
			return FALSE;
		}
		*min = atoi(str);
		*max = atoi(minusptr + 1);
		return TRUE;
	} else {
		*min = default_min;
		*max = default_max;
		return TRUE;
	}
}

int linphone_config_get_int(const LpConfig *lpconfig, const char *section, const char *key, int default_value) {
	const char *str = linphone_config_get_string(lpconfig, section, key, NULL);
	if (str != NULL) {
		int ret = 0;

		if (strstr(str, "0x") == str) {
			sscanf(str, "%x", &ret);
		} else sscanf(str, "%i", &ret);
		return ret;
	} else return default_value;
}

bool_t linphone_config_get_bool(const LpConfig *lpconfig, const char *section, const char *key, bool_t default_value) {
	const char *str = linphone_config_get_string(lpconfig, section, key, NULL);
	if (str != NULL) {
		int ret = 0;
		sscanf(str, "%i", &ret);
		return ret != 0;
	}
	return default_value;
}

int64_t
linphone_config_get_int64(const LpConfig *lpconfig, const char *section, const char *key, int64_t default_value) {
	const char *str = linphone_config_get_string(lpconfig, section, key, NULL);
	if (str != NULL) {
#ifdef _WIN32
		return (int64_t)_atoi64(str);
#else
		return atoll(str);
#endif
	} else return default_value;
}

float linphone_config_get_float(const LpConfig *lpconfig, const char *section, const char *key, float default_value) {
	const char *str = linphone_config_get_string(lpconfig, section, key, NULL);
	float ret = default_value;
	if (str == NULL) return default_value;
	sscanf(str, "%f", &ret);
	return ret;
}

bool_t linphone_config_get_overwrite_flag_for_entry(const LpConfig *lpconfig, const char *section, const char *key) {
	LpSection *sec;
	LpItem *item;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) return item->overwrite;
	}
	return FALSE;
}

bool_t linphone_config_get_overwrite_flag_for_section(const LpConfig *lpconfig, const char *section) {
	LpSection *sec;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		return sec->overwrite;
	}
	return FALSE;
}

bool_t linphone_config_get_skip_flag_for_entry(const LpConfig *lpconfig, const char *section, const char *key) {
	LpSection *sec;
	LpItem *item;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) return item->skip;
	}
	return FALSE;
}

bool_t linphone_config_get_skip_flag_for_section(const LpConfig *lpconfig, const char *section) {
	LpSection *sec;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		return sec->skip;
	}
	return FALSE;
}

void linphone_config_set_string(LpConfig *lpconfig, const char *section, const char *key, const char *value) {
	LpItem *item;
	LpSection *sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) {
			if ((value != NULL) && (value[0] != '\0')) {
				if (strcmp(value, item->value) == 0) return;
				lp_item_set_value(item, value);
			} else {
				lp_section_remove_item(sec, item);
			}
		} else {
			if (value != NULL && value[0] != '\0') lp_section_add_item(sec, lp_item_new(key, value));
		}
	} else if (value != NULL && value[0] != '\0') {
		sec = lp_section_new(section);
		linphone_config_add_section(lpconfig, sec);
		lp_section_add_item(sec, lp_item_new(key, value));
	}
	lpconfig->modified = TRUE;
}

void linphone_config_set_string_list(LpConfig *lpconfig,
                                     const char *section,
                                     const char *key,
                                     const bctbx_list_t *value) {
	char *strvalue = NULL;
	char *tmp = NULL;
	const bctbx_list_t *elem;
	for (elem = value; elem != NULL; elem = elem->next) {
		if (strvalue) {
			tmp = ms_strdup_printf("%s,%s", strvalue, (const char *)elem->data);
			ms_free(strvalue);
			strvalue = tmp;
		} else strvalue = ms_strdup((const char *)elem->data);
	}
	linphone_config_set_string(lpconfig, section, key, strvalue);
	if (strvalue) ms_free(strvalue);
}

void linphone_config_set_range(LpConfig *lpconfig, const char *section, const char *key, int min_value, int max_value) {
	char tmp[30];
	snprintf(tmp, sizeof(tmp), "%i-%i", min_value, max_value);
	linphone_config_set_string(lpconfig, section, key, tmp);
}

void linphone_config_set_int(LpConfig *lpconfig, const char *section, const char *key, int value) {
	char tmp[30];
	snprintf(tmp, sizeof(tmp), "%i", value);
	linphone_config_set_string(lpconfig, section, key, tmp);
}

void linphone_config_set_bool(LpConfig *lpconfig, const char *section, const char *key, bool_t value) {
	if (value) {
		linphone_config_set_int(lpconfig, section, key, 1);
	} else {
		linphone_config_set_int(lpconfig, section, key, 0);
	}
}

void linphone_config_set_int_hex(LpConfig *lpconfig, const char *section, const char *key, int value) {
	char tmp[30];
	snprintf(tmp, sizeof(tmp), "0x%x", value);
	linphone_config_set_string(lpconfig, section, key, tmp);
}

void linphone_config_set_int64(LpConfig *lpconfig, const char *section, const char *key, int64_t value) {
	char tmp[30];
	snprintf(tmp, sizeof(tmp), "%lli", (long long)value);
	linphone_config_set_string(lpconfig, section, key, tmp);
}

void linphone_config_set_float(LpConfig *lpconfig, const char *section, const char *key, float value) {
	char tmp[30];
	snprintf(tmp, sizeof(tmp), "%f", value);
	linphone_config_set_string(lpconfig, section, key, tmp);
}

void linphone_config_set_overwrite_flag_for_entry(LpConfig *lpconfig,
                                                  const char *section,
                                                  const char *key,
                                                  bool_t value) {
	LpSection *sec;
	LpItem *item;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) item->overwrite = value;
	}
}

void linphone_config_set_overwrite_flag_for_section(LpConfig *lpconfig, const char *section, bool_t value) {
	LpSection *sec;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		sec->overwrite = value;
	}
}

void linphone_config_set_skip_flag_for_entry(LpConfig *lpconfig, const char *section, const char *key, bool_t value) {
	LpSection *sec;
	LpItem *item;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) item->skip = value;
	}
}

void linphone_config_set_skip_flag_for_section(LpConfig *lpconfig, const char *section, bool_t value) {
	LpSection *sec;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		sec->skip = value;
	}
}

void lp_item_write(LpItem *item, LpConfig *lpconfig) {
	int ret = -1;
	if (item->is_comment) {
		ret = (int)bctbx_file_fprintf(lpconfig->pFile, 0, "%s\n", item->value);

	} else if (item->value && item->value[0] != '\0') {
		ret = (int)bctbx_file_fprintf(lpconfig->pFile, 0, "%s=%s\n", item->key, item->value);
	} else {
		ms_warning("Not writing item %s to file, it is empty", item->key);
	}
	if (ret < 0) {
		ms_error("lp_item_write : not writing item to file");
	}
}

void lp_section_param_write(LpSectionParam *param, LpConfig *lpconfig) {
	if (param->value && param->value[0] != '\0') {
		bctbx_file_fprintf(lpconfig->pFile, 0, " %s=%s", param->key, param->value);

	} else {
		ms_warning("Not writing param %s to file, it is empty", param->key);
	}
}

void lp_section_write(LpSection *sec, LpConfig *lpconfig) {
	if (bctbx_file_fprintf(lpconfig->pFile, 0, "[%s", sec->name) < 0)
		ms_error("lp_section_write : write error on %s", sec->name);
	bctbx_list_for_each2(sec->params, (void (*)(void *, void *))lp_section_param_write, (void *)lpconfig);

	if (bctbx_file_fprintf(lpconfig->pFile, 0, "]\n") < 0) ms_error("lp_section_write : write error ");
	bctbx_list_for_each2(sec->items, (void (*)(void *, void *))lp_item_write, (void *)lpconfig);

	if (bctbx_file_fprintf(lpconfig->pFile, 0, "\n") < 0) ms_error("lp_section_write : write error");
}

void linphone_config_simulate_read_failure(bool_t value) {
	simulate_read_failure = value;
}

void linphone_config_simulate_crash_during_sync(LinphoneConfig *lpconfig, bool_t value) {
	lpconfig->abort_sync = value;
}

LinphoneStatus linphone_config_sync(LpConfig *lpconfig) {
	bctbx_vfs_file_t *pFile = NULL;
	if (lpconfig->filename == NULL) return -1;
	if (lpconfig->readonly) return 0;

#ifndef _WIN32
	/* don't create group/world-accessible files */
	(void)umask(S_IRWXG | S_IRWXO);
#endif
	if (lpconfig->tmpfilename) pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, lpconfig->tmpfilename, "w");
	lpconfig->pFile = pFile;
	if (pFile == NULL) {
		ms_warning("Could not write %s ! Maybe it is read-only. Configuration will not be saved.", lpconfig->filename);
		lpconfig->readonly = TRUE;
		return -1;
	}

	if (lpconfig->abort_sync) {
		ms_warning("linphone_config_sync(): simulating crash during file writing, leaving an empty file.");
		bctbx_file_close(pFile);
		return -1;
	}

	bctbx_list_for_each2(lpconfig->sections, (void (*)(void *, void *))lp_section_write, (void *)lpconfig);
	bctbx_file_sync(pFile);
	bctbx_file_close(pFile);
	lpconfig->pFile = NULL;

#ifdef RENAME_REQUIRES_NONEXISTENT_NEW_PATH
	/* On windows, rename() does not accept that the newpath is an existing file, while it is accepted on Unix.
	 * As a result, we are forced to first delete the linphonerc file, and then rename.*/
	if (remove(lpconfig->filename) != 0) {
		ms_error("Cannot remove %s: %s", lpconfig->filename, strerror(errno));
	}
#endif
	if (rename(lpconfig->tmpfilename, lpconfig->filename) != 0) {
		ms_error("Cannot rename %s into %s: %s", lpconfig->tmpfilename, lpconfig->filename, strerror(errno));
	}
	lpconfig->modified = FALSE;
	return 0;
}

void linphone_config_reload(LinphoneConfig *lpconfig) {
	bctbx_list_for_each(lpconfig->sections, (void (*)(void *))lp_section_destroy);
	bctbx_list_free(lpconfig->sections);
	lpconfig->sections = NULL;
	linphone_config_read_file(lpconfig, lpconfig->filename);
}

int linphone_config_has_section(const LpConfig *lpconfig, const char *section) {
	if (linphone_config_find_section(lpconfig, section) != NULL) return 1;
	return 0;
}

void linphone_config_for_each_section(const LpConfig *lpconfig,
                                      void (*callback)(const char *section, void *ctx),
                                      void *ctx) {
	LpSection *sec;
	bctbx_list_t *elem;
	for (elem = lpconfig->sections; elem != NULL; elem = bctbx_list_next(elem)) {
		sec = (LpSection *)elem->data;
		callback(sec->name, ctx);
	}
}

void linphone_config_for_each_entry(const LpConfig *lpconfig,
                                    const char *section,
                                    void (*callback)(const char *entry, void *ctx),
                                    void *ctx) {
	LpItem *item;
	bctbx_list_t *elem;
	LpSection *sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		for (elem = sec->items; elem != NULL; elem = bctbx_list_next(elem)) {
			item = (LpItem *)elem->data;
			if (!item->is_comment) callback(item->key, ctx);
		}
	}
}

void linphone_config_clean_section(LpConfig *lpconfig, const char *section) {
	LpSection *sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		linphone_config_remove_section(lpconfig, sec);
	}
	lpconfig->modified = TRUE;
}

bool_t linphone_config_needs_commit(const LpConfig *lpconfig) {
	return lpconfig->modified;
}

static const char *DEFAULT_VALUES_SUFFIX = "_default_values";

int linphone_config_get_default_int(const LpConfig *lpconfig, const char *section, const char *key, int default_value) {
	char default_section[MAX_LEN];
	strcpy(default_section, section);
	strcat(default_section, DEFAULT_VALUES_SUFFIX);

	return linphone_config_get_int(lpconfig, default_section, key, default_value);
}

int64_t linphone_config_get_default_int64(const LpConfig *lpconfig,
                                          const char *section,
                                          const char *key,
                                          int64_t default_value) {
	char default_section[MAX_LEN];
	strcpy(default_section, section);
	strcat(default_section, DEFAULT_VALUES_SUFFIX);

	return linphone_config_get_int64(lpconfig, default_section, key, default_value);
}

float linphone_config_get_default_float(const LpConfig *lpconfig,
                                        const char *section,
                                        const char *key,
                                        float default_value) {
	char default_section[MAX_LEN];
	strcpy(default_section, section);
	strcat(default_section, DEFAULT_VALUES_SUFFIX);

	return linphone_config_get_float(lpconfig, default_section, key, default_value);
}

const char *linphone_config_get_default_string(const LpConfig *lpconfig,
                                               const char *section,
                                               const char *key,
                                               const char *default_value) {
	char default_section[MAX_LEN];
	strcpy(default_section, section);
	strcat(default_section, DEFAULT_VALUES_SUFFIX);

	return linphone_config_get_string(lpconfig, default_section, key, default_value);
}

/*
 * WARNING: this function is very dangerous.
 * Read carefuly the folowing notices:
 * 1. The 'path' parameter may be modify by
 *    the function. Be care to keep a copy of
 *    the original string.
 * 2. The return pointer may points on a part of
 *    'path'. So, be care to not free the string
 *    pointed by 'path' before the last used of
 *    the returned pointer.
 * 3. Do not feed it after midnight
 */
static const char *_linphone_config_dirname(char *path) {
#ifdef _MSC_VER
	char drive[_MAX_DRIVE];
	char dir[_MAX_DIR];
	char fname[_MAX_FNAME];
	char ext[_MAX_EXT];
	static char dirname[_MAX_DRIVE + _MAX_DIR];
	_splitpath(path, drive, dir, fname, ext);
	snprintf(dirname, sizeof(dirname), "%s%s", drive, dir);
	return dirname;
#else
	return dirname(path);
#endif
}

bool_t linphone_config_relative_file_exists(const LpConfig *lpconfig, const char *filename) {
	bctbx_vfs_file_t *pFile;
	if (lpconfig->filename == NULL) {
		return FALSE;
	} else {
		char *conf_path = ms_strdup(lpconfig->filename);
		const char *dir = _linphone_config_dirname(conf_path);
		char *filepath = ms_strdup_printf("%s/%s", dir, filename);
		char *realfilepath = lp_realpath(filepath, NULL);

		ms_free(conf_path);
		ms_free(filepath);

		if (realfilepath == NULL) return FALSE;

		pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, realfilepath, "r");
		ms_free(realfilepath);
		if (pFile != NULL) {
			bctbx_file_close(pFile);
		}
		return pFile != NULL;
	}
}

void linphone_config_write_relative_file(const LpConfig *lpconfig, const char *filename, const char *data) {
	char *dup_config_file = NULL;
	const char *dir = NULL;
	char *filepath = NULL;
	char *realfilepath = NULL;
	bctbx_vfs_file_t *pFile;

	if (lpconfig->filename == NULL) return;

	if (strlen(data) == 0) {
		ms_warning("%s has not been created because there is no data to write", filename);
		return;
	}

	dup_config_file = ms_strdup(lpconfig->filename);
	dir = _linphone_config_dirname(dup_config_file);
	filepath = ms_strdup_printf("%s/%s", dir, filename);
	realfilepath = lp_realpath(filepath, NULL);
	if (realfilepath == NULL) {
		ms_error("Could not resolv %s: %s", filepath, strerror(errno));
		goto end;
	}

	pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, realfilepath, "w");
	if (pFile == NULL) {
		ms_error("Could not open %s for write", realfilepath);
		goto end;
	}
	bctbx_file_fprintf(pFile, 0, "%s", data);
	bctbx_file_close(pFile);

end:
	ms_free(dup_config_file);
	ms_free(filepath);
	if (realfilepath) ms_free(realfilepath);
}

LinphoneStatus
linphone_config_read_relative_file(const LpConfig *lpconfig, const char *filename, char *data, size_t max_length) {
	char *dup_config_file = NULL;
	const char *dir = NULL;
	char *filepath = NULL;
	bctbx_vfs_file_t *pFile = NULL;

	char *realfilepath = NULL;

	if (lpconfig->filename == NULL) return -1;

	dup_config_file = ms_strdup(lpconfig->filename);
	dir = _linphone_config_dirname(dup_config_file);
	filepath = ms_strdup_printf("%s/%s", dir, filename);
	realfilepath = lp_realpath(filepath, NULL);
	if (realfilepath == NULL) {
		ms_error("Could not resolv %s: %s", filepath, strerror(errno));
		goto err;
	}

	pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, realfilepath, "r");
	if (pFile == NULL) {
		ms_error("Could not open %s for read.", realfilepath);
		goto err;
	}

	if (bctbx_file_read(pFile, data, 1, (off_t)max_length) < 0) {
		ms_error("%s could not be loaded.", realfilepath);
		goto err;
	}

	bctbx_file_close(pFile);

	ms_free(dup_config_file);
	ms_free(filepath);
	ms_free(realfilepath);
	return 0;

err:
	ms_free(dup_config_file);
	ms_free(filepath);
	if (realfilepath) ms_free(realfilepath);
	return -1;
}

const char **linphone_config_get_sections_names(LpConfig *lpconfig) {
	const char **sections_names;
	const bctbx_list_t *sections = lpconfig->sections;
	size_t ndev;
	int i;

	ndev = bctbx_list_size(sections);
	sections_names = reinterpret_cast<const char **>(ms_malloc((ndev + 1) * sizeof(const char *)));

	for (i = 0; sections != NULL; sections = sections->next, i++) {
		LpSection *section = (LpSection *)sections->data;
		sections_names[i] = ms_strdup(section->name);
	}

	sections_names[ndev] = NULL;
	return sections_names;
}

bctbx_list_t *linphone_config_get_sections_names_list(LinphoneConfig *lpconfig) {
	const bctbx_list_t *sections = lpconfig->sections;
	bctbx_list_t *sections_names = NULL;
	int i;

	for (i = 0; sections != NULL; sections = sections->next, i++) {
		LpSection *section = (LpSection *)sections->data;
		sections_names = bctbx_list_append(sections_names, section->name);
	}

	return sections_names;
}

bctbx_list_t *linphone_config_get_keys_names_list(LinphoneConfig *lpconfig, const char *section) {
	LpSection *sec;
	bctbx_list_t *keys_names = NULL, *items;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		items = lp_section_get_items(sec);
		for (bctbx_list_t *item_it = items; item_it != NULL; item_it = item_it->next) {
			LpItem *item = (LpItem *)item_it->data;
			keys_names = bctbx_list_append(keys_names, item->key);
		}
		if (items) bctbx_list_free(items);
	}
	return keys_names;
}

char *linphone_config_dump_as_xml(const LpConfig *lpconfig) {
	char *buffer = NULL;
#ifdef HAVE_XML2
	lpc2xml_context *ctx = lpc2xml_context_new(NULL, NULL);
	lpc2xml_set_lpc(ctx, lpconfig);
	lpc2xml_convert_string(ctx, &buffer);
	lpc2xml_context_destroy(ctx);
#else
	ms_warning("linphone_config_dump_as_xml(): stubbed.");
#endif
	return buffer;
}

struct _entry_data {
	const LpConfig *conf;
	const char *section;
	char **buffer;
};

static void dump_entry(const char *entry, void *data) {
	struct _entry_data *d = (struct _entry_data *)data;
	const char *value = linphone_config_get_string(d->conf, d->section, entry, "");
	*d->buffer = ms_strcat_printf(*d->buffer, "\t%s=%s\n", entry, value);
}

static void dump_section(const char *section, void *data) {
	struct _entry_data *d = (struct _entry_data *)data;
	d->section = section;
	*d->buffer = ms_strcat_printf(*d->buffer, "[%s]\n", section);
	linphone_config_for_each_entry(d->conf, section, dump_entry, d);
}

char *linphone_config_dump(const LpConfig *lpconfig) {
	char *buffer = NULL;
	struct _entry_data d = {lpconfig, NULL, &buffer};
	linphone_config_for_each_section(lpconfig, dump_section, &d);

	return buffer;
}

void linphone_config_clean_entry(LpConfig *lpconfig, const char *section, const char *key) {
	LpSection *sec;
	LpItem *item;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		item = lp_section_find_item(sec, key);
		if (item != NULL) lp_section_remove_item(sec, item);
	}
	return;
}
int linphone_config_has_entry(const LpConfig *lpconfig, const char *section, const char *key) {
	LpSection *sec;
	sec = linphone_config_find_section(lpconfig, section);
	if (sec != NULL) {
		return lp_section_find_item(sec, key) != NULL;
	} else return FALSE;
}

bool_t linphone_config_is_readonly(const LpConfig *lpconfig) {
	return lpconfig->filename == NULL || lpconfig->readonly;
}

BELLE_SIP_INSTANCIATE_VPTR(LinphoneConfig,
                           belle_sip_object_t,
                           _linphone_config_uninit, // uninit
                           NULL,                    // copy
                           NULL,                    // marshal
                           FALSE);