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asterisk/res/res_geolocation/geoloc_dialplan.c
George Joseph 639d72e98c Geolocation: Core Capability Preview 
This commit adds res_geolocation which creates the core capabilities
to manipulate Geolocation information on SIP INVITEs.

An upcoming commit will add res_pjsip_geolocation which will
allow the capabilities to be used with the pjsip channel driver.

This commit message is intentionally short because this isn't
a simple capability.  See the documentation at
https://wiki.asterisk.org/wiki/display/AST/Geolocation
for more information.

THE CAPABILITIES IMPLEMENTED HERE MAY CHANGE BASED ON
USER FEEDBACK!

ASTERISK-30127

Change-Id: Ibfde963121b1ecf57fd98ee7060c4f0808416303
2022-07-12 07:52:12 -05:00

458 lines
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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2022, Sangoma Technologies Corporation
*
* George Joseph <gjoseph@sangoma.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
#include "asterisk.h"
#include "asterisk/config.h"
#include "asterisk/cli.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/strings.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/res_geolocation.h"
#include "geoloc_private.h"
static void varlist_to_str(struct ast_variable *list, struct ast_str** buf, size_t len)
{
struct ast_variable *var = list;
for (; var; var = var->next) {
ast_str_append(buf, len, "%s=\"%s\"%s", var->name, var->value, var->next ? "," : "");
}
}
static int geoloc_profile_read(struct ast_channel *chan,
const char *cmd, char *data, struct ast_str **buf, ssize_t len)
{
char *parsed_data = ast_strdupa(data);
int index = -1;
struct ast_datastore *ds;
struct ast_geoloc_eprofile *eprofile = NULL;
int profile_count = 0;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(field);
AST_APP_ARG(index);
);
/* Check for zero arguments */
if (ast_strlen_zero(parsed_data)) {
ast_log(LOG_ERROR, "%s: Cannot call without arguments\n", cmd);
return -1;
}
AST_STANDARD_APP_ARGS(args, parsed_data);
if (ast_strlen_zero(args.field)) {
ast_log(LOG_ERROR, "%s: Cannot call without a field to query\n", cmd);
return -1;
}
if (!ast_strlen_zero(args.index)) {
if (sscanf(args.index, "%30d", &index) != 1) {
ast_log(LOG_ERROR, "%s: profile_index '%s' is invalid\n", cmd, args.index);
return -1;
}
}
ds = ast_geoloc_datastore_find(chan);
if (!ds) {
ast_log(LOG_NOTICE, "%s: There are no geoloc profiles on this channel\n", cmd);
return -1;
}
profile_count = ast_geoloc_datastore_size(ds);
if (index < 0) {
if (ast_strings_equal(args.field, "count")) {
ast_str_append(buf, len, "%d", profile_count);
} else if (ast_strings_equal(args.field, "inheritable")) {
ast_str_append(buf, len, "%d", ds->inheritance ? 1 : 0);
} else {
ast_log(LOG_ERROR, "%s: Field '%s' is not valid\n", cmd, args.field);
return -1;
}
return 0;
}
if (index >= profile_count) {
ast_log(LOG_ERROR, "%s: index %d is out of range 0 -> %d\n", cmd, index, profile_count);
return -1;
}
eprofile = ast_geoloc_datastore_get_eprofile(ds, index);
if (!eprofile) {
ast_log(LOG_ERROR, "%s: Internal Error. Profile at index %d couldn't be retrieved.\n", cmd, index);
return -1;
}
if (ast_strings_equal(args.field, "id")) {
ast_str_append(buf, len, "%s", eprofile->id);
} else if (ast_strings_equal(args.field, "location_reference")) {
ast_str_append(buf, len, "%s", eprofile->location_reference);
} else if (ast_strings_equal(args.field, "method")) {
ast_str_append(buf, len, "%s", eprofile->method);
} else if (ast_strings_equal(args.field, "geolocation_routing")) {
ast_str_append(buf, len, "%s", eprofile->geolocation_routing ? "yes" : "no");
} else if (ast_strings_equal(args.field, "profile_action")) {
ast_str_append(buf, len, "%s", geoloc_action_to_name(eprofile->action));
} else if (ast_strings_equal(args.field, "format")) {
ast_str_append(buf, len, "%s", geoloc_format_to_name(eprofile->format));
} else if (ast_strings_equal(args.field, "pidf_element")) {
ast_str_append(buf, len, "%s", geoloc_pidf_element_to_name(eprofile->pidf_element));
} else if (ast_strings_equal(args.field, "location_source")) {
ast_str_append(buf, len, "%s", eprofile->location_source);
} else if (ast_strings_equal(args.field, "location_info")) {
varlist_to_str(eprofile->location_info, buf, len);
} else if (ast_strings_equal(args.field, "location_info_refinement")) {
varlist_to_str(eprofile->location_refinement, buf, len);
} else if (ast_strings_equal(args.field, "location_variables")) {
varlist_to_str(eprofile->location_variables, buf, len);
} else if (ast_strings_equal(args.field, "effective_location")) {
varlist_to_str(eprofile->effective_location, buf, len);
} else if (ast_strings_equal(args.field, "usage_rules")) {
varlist_to_str(eprofile->usage_rules, buf, len);
} else {
ast_log(LOG_ERROR, "%s: Field '%s' is not valid\n", cmd, args.field);
return -1;
}
ao2_ref(eprofile, -1);
return 0;
}
#define TEST_ENUM_VALUE(_cmd, _ep, _field, _value) \
({ \
enum ast_geoloc_ ## _field v; \
if (!_ep) { \
ast_log(LOG_ERROR, "%s: Field %s requires a valid index\n", _cmd, #_field); \
return -1; \
} \
v = geoloc_ ## _field ## _str_to_enum(_value); \
if (v == AST_GEOLOC_INVALID_VALUE) { \
ast_log(LOG_ERROR, "%s: %s '%s' is invalid\n", _cmd, #_field, value); \
return -1; \
} \
_ep->_field = v; \
})
#define TEST_VARLIST(_cmd, _ep, _field, _value) \
({ \
struct ast_variable *_list; \
if (!_ep) { \
ast_log(LOG_ERROR, "%s: Field %s requires a valid index\n", _cmd, #_field); \
return -1; \
} \
_list = ast_variable_list_from_quoted_string(_value, ",", "=", "\"" ); \
if (!_list) { \
ast_log(LOG_ERROR, "%s: %s '%s' is malformed or contains invalid values", _cmd, #_field, _value); \
return -1; \
} \
ast_variables_destroy(_ep->_field); \
_ep->_field = _list; \
})
static int geoloc_profile_write(struct ast_channel *chan, const char *cmd, char *data,
const char *value)
{
char *parsed_data = ast_strdupa(data);
struct ast_datastore *ds;
RAII_VAR(struct ast_geoloc_eprofile *, eprofile, NULL, ao2_cleanup);
int profile_count = 0;
int index = -1;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(field);
AST_APP_ARG(index);
);
/* Check for zero arguments */
if (ast_strlen_zero(parsed_data)) {
ast_log(LOG_ERROR, "%s: Cannot call without arguments\n", cmd);
return -1;
}
AST_STANDARD_APP_ARGS(args, parsed_data);
if (ast_strlen_zero(args.field)) {
ast_log(LOG_ERROR, "%s: Cannot call without a field to set\n", cmd);
return -1;
}
if (!ast_strlen_zero(args.index)) {
if (sscanf(args.index, "%30d", &index) != 1) {
ast_log(LOG_ERROR, "%s: profile_index '%s' is invalid\n", cmd, args.index);
return -1;
}
}
ds = ast_geoloc_datastore_find(chan);
if (!ds) {
ast_log(LOG_WARNING, "%s: There are no geoloc profiles on this channel\n", cmd);
return -1;
}
profile_count = ast_geoloc_datastore_size(ds);
if (index >= 0 && index < profile_count) {
eprofile = ast_geoloc_datastore_get_eprofile(ds, index);
if (!eprofile) {
ast_log(LOG_ERROR, "%s: Internal Error. Profile at index %d couldn't be retrieved.\n", cmd, index);
return -1;
}
} else if (index >= profile_count) {
ast_log(LOG_ERROR, "%s: index %d is out of range 0 -> %d\n", cmd, index, profile_count);
return -1;
} else {
if (ast_strings_equal(args.field, "inheritable")) {
ast_geoloc_datastore_set_inheritance(ds, ast_true(value));
} else {
ast_log(LOG_ERROR, "%s: Field '%s' is not valid or requires a profile index\n", cmd, args.field);
return -1;
}
return 0;
}
if (ast_strings_equal(args.field, "location_reference")) {
struct ast_geoloc_location *loc = ast_geoloc_get_location(value);
ao2_cleanup(loc);
if (!loc) {
ast_log(LOG_ERROR, "%s: Location reference '%s' doesn't exist\n", cmd, value);
return -1;
}
ast_string_field_set(eprofile, location_reference, value);
} else if (ast_strings_equal(args.field, "method")) {
ast_string_field_set(eprofile, method, value);
} else if (ast_strings_equal(args.field, "geolocation_routing")) {
eprofile->geolocation_routing = ast_true(value);
} else if (ast_strings_equal(args.field, "profile_action")) {
TEST_ENUM_VALUE(cmd, eprofile, action, value);
} else if (ast_strings_equal(args.field, "format")) {
TEST_ENUM_VALUE(cmd, eprofile, format, value);
} else if (ast_strings_equal(args.field, "pidf_element")) {
TEST_ENUM_VALUE(cmd, eprofile, pidf_element, value);
} else if (ast_strings_equal(args.field, "location_info")) {
TEST_VARLIST(cmd, eprofile, location_info, value);
} else if (ast_strings_equal(args.field, "location_source")) {
ast_string_field_set(eprofile, location_source, value);
} else if (ast_strings_equal(args.field, "location_info_refinement")) {
TEST_VARLIST(cmd, eprofile, location_refinement, value);
} else if (ast_strings_equal(args.field, "location_variables")) {
TEST_VARLIST(cmd, eprofile, location_variables, value);
} else if (ast_strings_equal(args.field, "effective_location")) {
TEST_VARLIST(cmd, eprofile, effective_location, value);
} else if (ast_strings_equal(args.field, "usage_rules")) {
TEST_VARLIST(cmd, eprofile, usage_rules, value);
} else {
ast_log(LOG_ERROR, "%s: Field '%s' is not valid\n", cmd, args.field);
return -1;
}
ast_geoloc_eprofile_refresh_location(eprofile);
return 0;
}
static struct ast_custom_function geoloc_function = {
.name = "GEOLOC_PROFILE",
.read2 = geoloc_profile_read,
.write = geoloc_profile_write,
};
#define profile_create "GeolocProfileCreate"
static int geoloc_eprofile_create(struct ast_channel *chan, const char *data)
{
char *parsed_data = ast_strdupa(data);
struct ast_datastore *ds;
struct ast_geoloc_eprofile * eprofile;
int profile_count = 0;
int index = -1;
int rc = 0;
struct ast_str *new_size;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(id);
AST_APP_ARG(index);
);
/* Check for zero arguments */
if (ast_strlen_zero(parsed_data)) {
ast_log(LOG_ERROR, "%s: Cannot call without arguments\n", profile_create);
return -1;
}
AST_STANDARD_APP_ARGS(args, parsed_data);
if (ast_strlen_zero(args.id)) {
ast_log(LOG_ERROR, "%s: Cannot call without an id field\n", profile_create);
return -1;
}
if (!ast_strlen_zero(args.index)) {
if (sscanf(args.index, "%30d", &index) != 1) {
ast_log(LOG_ERROR, "%s: profile_index '%s' is invalid\n", profile_create, args.index);
return -1;
}
} else {
index = -1;
}
ds = ast_geoloc_datastore_find(chan);
if (!ds) {
ast_log(LOG_WARNING, "%s: There are no geoloc profiles on this channel\n", profile_create);
return -1;
}
profile_count = ast_geoloc_datastore_size(ds);
if (index < -1 || index >= profile_count) {
ast_log(LOG_ERROR, "%s: Invalid insert_before index '%d'. It must be 0 to insert at the beginning of the list or -1 to append to the end of the list\n", profile_create, index);
return -1;
}
eprofile = ast_geoloc_eprofile_alloc(args.id);
if (!eprofile) {
ast_log(LOG_ERROR, "%s: Could not allocate eprofile '%s'\n", profile_create, args.id);
return -1;
}
ds = ast_geoloc_datastore_find(chan);
if (!ds) {
ds = ast_geoloc_datastore_create_from_eprofile(eprofile);
if (!ds) {
ao2_ref(eprofile, -1);
ast_log(LOG_ERROR, "%s: Could not create datastore for eprofile '%s'\n", profile_create, args.id);
return -1;
}
rc = 1;
ast_channel_datastore_add(chan, ds);
} else if (index < 0) {
rc = ast_geoloc_datastore_add_eprofile(ds, eprofile);
if (rc <= 0) {
ao2_ref(eprofile, -1);
ast_log(LOG_ERROR, "%s: Could not add eprofile '%s' to datastore\n", profile_create, args.id);
return -1;
}
} else {
rc = ast_geoloc_datastore_insert_eprofile(ds, eprofile, index);
if (rc <= 0) {
ao2_ref(eprofile, -1);
ast_log(LOG_ERROR, "%s: Could not insert eprofile '%s' to datastore\n", profile_create, args.id);
return -1;
}
}
new_size = ast_str_alloca(16);
ast_str_append(&new_size, 0, "%d", rc);
pbx_builtin_setvar_helper(chan, "GEOLOC_PROFILE_COUNT", ast_str_buffer(new_size));
return 0;
}
#define profile_delete "GeolocProfileDelete"
static int geoloc_eprofile_delete(struct ast_channel *chan, const char *data)
{
char *parsed_data = ast_strdupa(data);
struct ast_datastore *ds;
int profile_count = 0;
int index = -1;
struct ast_str *new_size;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(index);
);
/* Check for zero arguments */
if (ast_strlen_zero(parsed_data)) {
ast_log(LOG_ERROR, "%s: Cannot call without arguments\n", profile_delete);
return -1;
}
AST_STANDARD_APP_ARGS(args, parsed_data);
if (!ast_strlen_zero(args.index)) {
if (sscanf(args.index, "%30d", &index) != 1) {
ast_log(LOG_ERROR, "%s: profile_index '%s' is invalid\n", profile_delete, args.index);
return -1;
}
} else {
ast_log(LOG_ERROR, "%s: A profile_index is required\n", profile_delete);
return -1;
}
ds = ast_geoloc_datastore_find(chan);
if (!ds) {
ast_log(LOG_WARNING, "%s: There are no geoloc profiles on this channel\n", profile_delete);
return -1;
}
profile_count = ast_geoloc_datastore_size(ds);
if (index < -1 || index >= profile_count) {
ast_log(LOG_ERROR, "%s: Invalid profile_index '%d'. It must be between 0 and %d\n",
profile_create, index, profile_count - 1);
return -1;
}
ast_geoloc_datastore_delete_eprofile(ds, index);
profile_count = ast_geoloc_datastore_size(ds);
new_size = ast_str_alloca(16);
ast_str_append(&new_size, 0, "%d", profile_count);
pbx_builtin_setvar_helper(chan, "GEOLOC_PROFILE_COUNT", ast_str_buffer(new_size));
return 0;
}
int geoloc_dialplan_unload(void)
{
ast_unregister_application(profile_delete);
ast_unregister_application(profile_create);
ast_custom_function_unregister(&geoloc_function);
return AST_MODULE_LOAD_SUCCESS;
}
int geoloc_dialplan_load(void)
{
int res = 0;
res = ast_custom_function_register(&geoloc_function);
if (res == 0) {
res = ast_register_application_xml(profile_create, geoloc_eprofile_create);
}
if (res == 0) {
res = ast_register_application_xml(profile_delete, geoloc_eprofile_delete);
}
return res == 0 ? AST_MODULE_LOAD_SUCCESS : AST_MODULE_LOAD_DECLINE;
}
int geoloc_dialplan_reload(void)
{
return AST_MODULE_LOAD_SUCCESS;
}
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