func_pjsip_contact.c File Reference

Get information about a PJSIP contact. More...

#include "asterisk.h"
#include <pjsip.h>
#include <pjlib.h>
#include "asterisk/app.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/sorcery.h"
#include "asterisk/res_pjsip.h"

Include dependency graph for func_pjsip_contact.c:

Go to the source code of this file.

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	contact_function_get_permanent (void *obj, void *arg, int flags)
static int	load_module (void)
static int	pjsip_contact_function_read (struct ast_channel *chan, const char *cmd, char *data, struct ast_str **buf, ssize_t len)
static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Get information about a PJSIP contact" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .requires = "res_pjsip", }
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_custom_function	pjsip_contact_function

Detailed Description

Get information about a PJSIP contact.

Author

Joshua Colp <jcolp@digium.com> 

Definition in file func_pjsip_contact.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 226 of file func_pjsip_contact.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 226 of file func_pjsip_contact.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 226 of file func_pjsip_contact.c.

contact_function_get_permanent()

static int contact_function_get_permanent ( void *  obj, void *  arg, int  flags  )

static

Definition at line 89 of file func_pjsip_contact.c.

{
    const char *id = arg;
 
    if (!strcmp(ast_sorcery_object_get_id(obj), id)) {
        return CMP_MATCH | CMP_STOP;
    }
 
    return 0;
}

References ast_sorcery_object_get_id(), CMP_MATCH, and CMP_STOP.

Referenced by pjsip_contact_function_read().

load_module()

static int load_module ( void  )

static

Definition at line 216 of file func_pjsip_contact.c.

{
    return ast_custom_function_register(&pjsip_contact_function);
}

References ast_custom_function_register, and pjsip_contact_function.

pjsip_contact_function_read()

static int pjsip_contact_function_read ( struct ast_channel *  chan, const char *  cmd, char *  data, struct ast_str **  buf, ssize_t  len  )

static

Definition at line 100 of file func_pjsip_contact.c.

{
    struct ast_sorcery *pjsip_sorcery;
    char *parsed_data = ast_strdupa(data);
    char *contact_name;
    RAII_VAR(struct ast_sip_contact *, contact_obj, NULL, ao2_cleanup);
    RAII_VAR(struct ast_sip_contact_status *, contact_status, NULL, ao2_cleanup);
    int res = 0;
 
    AST_DECLARE_APP_ARGS(args,
        AST_APP_ARG(contact_name);
        AST_APP_ARG(field_name);
    );
 
    /* Check for zero arguments */
    if (ast_strlen_zero(parsed_data)) {
        ast_log(AST_LOG_ERROR, "Cannot call %s without arguments\n", cmd);
        return -1;
    }
 
    AST_STANDARD_APP_ARGS(args, parsed_data);
 
    if (ast_strlen_zero(args.contact_name)) {
        ast_log(AST_LOG_ERROR, "Cannot call %s without a contact name to query\n", cmd);
        return -1;
    }
 
    if (ast_strlen_zero(args.field_name)) {
        ast_log(AST_LOG_ERROR, "Cannot call %s with an empty field name to query\n", cmd);
        return -1;
    }
 
    pjsip_sorcery = ast_sip_get_sorcery();
    if (!pjsip_sorcery) {
        ast_log(AST_LOG_ERROR, "Unable to retrieve PJSIP configuration: sorcery object is NULL\n");
        return -1;
    }
 
    /* Determine if this is a permanent contact or a normal contact */
    if ((contact_name = strstr(args.contact_name, "@@"))) {
        size_t aor_name_len = contact_name - args.contact_name;
        char aor_name[aor_name_len + 1];
        RAII_VAR(struct ast_sip_aor *, aor_obj, NULL, ao2_cleanup);
 
        /* Grab only the AOR name so we can retrieve the AOR which will give us the contact */
        strncpy(aor_name, args.contact_name, aor_name_len);
        aor_name[aor_name_len] = '\0';
 
        aor_obj = ast_sorcery_retrieve_by_id(pjsip_sorcery, "aor", aor_name);
        if (!aor_obj) {
            ast_log(AST_LOG_WARNING, "Failed to retrieve information for contact '%s'\n", args.contact_name);
            return -1;
        }
 
        contact_obj = ao2_callback(aor_obj->permanent_contacts, 0, contact_function_get_permanent, args.contact_name);
    } else {
        contact_obj = ast_sorcery_retrieve_by_id(pjsip_sorcery, "contact", args.contact_name);
    }
 
    if (!contact_obj) {
        ast_log(AST_LOG_WARNING, "Failed to retrieve information for contact '%s'\n", args.contact_name);
        return -1;
    }
 
    contact_status = ast_sip_get_contact_status(contact_obj);
 
    if (!strcmp(args.field_name, "status")) {
        ast_str_set(buf, len, "%s", ast_sip_get_contact_status_label(contact_status ? contact_status->status : UNKNOWN));
    } else if (!strcmp(args.field_name, "rtt")) {
        if (!contact_status || contact_status->status != AVAILABLE) {
            ast_str_set(buf, len, "%s", "N/A");
        } else {
            ast_str_set(buf, len, "%" PRId64, contact_status->rtt);
        }
    } else {
        struct ast_variable *change_set;
        struct ast_variable *it_change_set;
 
        change_set = ast_sorcery_objectset_create(pjsip_sorcery, contact_obj);
 
        if (!change_set) {
            ast_log(AST_LOG_WARNING, "Failed to retrieve information for contact '%s': change set is NULL\n", args.contact_name);
            return -1;
        }
 
        for (it_change_set = change_set; it_change_set; it_change_set = it_change_set->next) {
            if (!strcmp(it_change_set->name, args.field_name)) {
                ast_str_set(buf, len, "%s", it_change_set->value);
                break;
            }
        }
 
        if (!it_change_set) {
            ast_log(AST_LOG_WARNING, "Unknown property '%s' for PJSIP contact\n", args.field_name);
 
            res = 1;
        }
 
        ast_variables_destroy(change_set);
    }
 
    return res;
}

References ao2_callback, ao2_cleanup, args, AST_APP_ARG, AST_DECLARE_APP_ARGS, ast_log, AST_LOG_ERROR, AST_LOG_WARNING, ast_sip_get_contact_status(), ast_sip_get_contact_status_label(), ast_sip_get_sorcery(), ast_sorcery_objectset_create, ast_sorcery_retrieve_by_id(), AST_STANDARD_APP_ARGS, ast_str_set(), ast_strdupa, ast_strlen_zero(), ast_variables_destroy(), AVAILABLE, buf, contact_function_get_permanent(), len(), ast_variable::name, ast_variable::next, NULL, RAII_VAR, UNKNOWN, and ast_variable::value.

unload_module()

static int unload_module ( void  )

static

Definition at line 211 of file func_pjsip_contact.c.

{
    return ast_custom_function_unregister(&pjsip_contact_function);
}

References ast_custom_function_unregister(), and pjsip_contact_function.

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Get information about a PJSIP contact" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .requires = "res_pjsip", }

static

Definition at line 226 of file func_pjsip_contact.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 226 of file func_pjsip_contact.c.

pjsip_contact_function

struct ast_custom_function pjsip_contact_function

static

Initial value:

= {
    .name = "PJSIP_CONTACT",
    .read2 = pjsip_contact_function_read,
}

Definition at line 206 of file func_pjsip_contact.c.

                                                           {
    .name = "PJSIP_CONTACT",
    .read2 = pjsip_contact_function_read,
};

Referenced by load_module(), and unload_module().