pjsip_distributor.c File Reference

#include "asterisk.h"
#include <pjsip.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/acl.h"
#include "include/res_pjsip_private.h"
#include "asterisk/taskprocessor.h"
#include "asterisk/taskpool.h"
#include "asterisk/res_pjsip_cli.h"

Include dependency graph for pjsip_distributor.c:

Go to the source code of this file.

Data Structures
struct	distributor_dialog_data
struct	unidentified_request

Macros
#define	DEFAULT_SUSPECTS_BUCKETS   53
#define	DIALOG_ASSOCIATIONS_BUCKETS   251
#define	DISTRIBUTOR_POOL_SIZE   31

Functions
static struct ast_sip_auth *	alloc_artificial_auth (char *default_realm, char *default_algos_uac, char *default_algos_uas)
static	AO2_GLOBAL_OBJ_STATIC (artificial_auth)
static void	apply_acls (pjsip_rx_data *rdata)
static int	apply_endpoint_acl (pjsip_rx_data *rdata, struct ast_sip_endpoint *endpoint)
static int	apply_endpoint_contact_acl (pjsip_rx_data *rdata, struct ast_sip_endpoint *endpoint)
struct ast_sip_endpoint *	ast_pjsip_rdata_get_endpoint (pjsip_rx_data *rdata)
	Get the looked-up endpoint on an out-of dialog request or response.
void	ast_sip_destroy_distributor (void)
struct ast_sip_endpoint *	ast_sip_dialog_get_endpoint (pjsip_dialog *dlg)
	Get the endpoint associated with this dialog.
void	ast_sip_dialog_set_endpoint (pjsip_dialog *dlg, struct ast_sip_endpoint *endpoint)
	Set an endpoint on a SIP dialog so in-dialog requests do not undergo endpoint lookup.
void	ast_sip_dialog_set_serializer (pjsip_dialog *dlg, struct ast_taskprocessor *serializer)
	Set a serializer on a SIP dialog so requests and responses are automatically serialized.
struct ast_sip_auth *	ast_sip_get_artificial_auth (void)
	Retrieves a reference to the artificial auth.
struct ast_sip_endpoint *	ast_sip_get_artificial_endpoint (void)
	Retrieves a reference to the artificial endpoint.
struct ast_taskprocessor *	ast_sip_get_distributor_serializer (pjsip_rx_data *rdata)
	Determine the distributor serializer for the SIP message.
struct ast_taskprocessor *	ast_sip_get_distributor_serializer_dialog (pjsip_dialog *dlg)
	Determine the distributor serializer for the SIP dialog.
struct ast_taskprocessor *	ast_sip_get_distributor_serializer_hash (int hash)
	Determine the distributor serializer for a given hash.
int	ast_sip_initialize_distributor (void)
static pj_bool_t	authenticate (pjsip_rx_data *rdata)
static int	buf_hash (const char *pos, size_t len)
static int	buf_hash_add (const char *pos, size_t len, int hash)
static void	check_endpoint (pjsip_rx_data *rdata, struct unidentified_request *unid, const char *name)
static int	clean_task (const void *data)
static struct ao2_container *	cli_unid_get_container (const char *regex)
static const char *	cli_unid_get_id (const void *obj)
static int	cli_unid_iterate (void *container, ao2_callback_fn callback, void *args)
static int	cli_unid_print_body (void *obj, void *arg, int flags)
static int	cli_unid_print_header (void *obj, void *arg, int flags)
static void *	cli_unid_retrieve_by_id (const char *id)
static int	create_artificial_auth (void)
static int	create_artificial_endpoint (void)
static int	dialog_associations_cmp (void *obj, void *arg, int flags)
static int	dialog_associations_hash (const void *obj, int flags)
static int	distribute (void *data)
static pj_bool_t	distributor (pjsip_rx_data *rdata)
static int	distributor_pool_setup (void)
static void	distributor_pool_shutdown (void)
static pj_bool_t	endpoint_lookup (pjsip_rx_data *rdata)
static int	expire_requests (void *object, void *arg, int flags)
static int	extract_contact_addr (pjsip_contact_hdr *contact, struct ast_sockaddr **addrs)
static pjsip_dialog *	find_dialog (pjsip_rx_data *rdata)
static struct ast_taskprocessor *	find_request_serializer (pjsip_rx_data *rdata)
static void	global_loaded (const char *object_type)
static void	log_failed_request (pjsip_rx_data *rdata, char *msg, unsigned int count, unsigned int period)
static int	pjstr_hash (pj_str_t *str)
static int	pjstr_hash_add (pj_str_t *str, int hash)
static int	prune_task (const void *data)
static pj_status_t	record_serializer (pjsip_tx_data *tdata)
static int	suspects_compare (void *obj, void *arg, int flags)
static int	suspects_hash (const void *obj, int flags)
static int	suspects_sort (const void *obj, const void *arg, int flags)

Variables
static struct ast_sip_endpoint *	artificial_endpoint = NULL
static pjsip_module	auth_mod
static struct ast_cli_entry	cli_commands []
static struct ao2_container *	dialog_associations
static pjsip_module	distributor_mod
static struct ast_taskprocessor *	distributor_pool [DISTRIBUTOR_POOL_SIZE]
static pjsip_module	endpoint_mod
static struct ast_sorcery_observer	global_observer
	Observer which is used to update our interval and default_realm when the global setting changes.
static enum ast_sip_taskprocessor_overload_trigger	overload_trigger
struct ast_sched_context *	prune_context
struct ast_sip_cli_formatter_entry *	unid_formatter
static unsigned int	unidentified_count
static unsigned int	unidentified_period
static unsigned int	unidentified_prune_interval
static struct ao2_container *	unidentified_requests
static int	using_auth_username

Macro Definition Documentation

DEFAULT_SUSPECTS_BUCKETS

#define DEFAULT_SUSPECTS_BUCKETS   53

Definition at line 44 of file pjsip_distributor.c.

DIALOG_ASSOCIATIONS_BUCKETS

#define DIALOG_ASSOCIATIONS_BUCKETS   251

Definition at line 159 of file pjsip_distributor.c.

DISTRIBUTOR_POOL_SIZE

#define DISTRIBUTOR_POOL_SIZE   31

Number of serializers in pool if one not otherwise known. (Best if prime number)

Definition at line 60 of file pjsip_distributor.c.

Function Documentation

alloc_artificial_auth()

static struct ast_sip_auth * alloc_artificial_auth ( char *  default_realm, char *  default_algos_uac, char *  default_algos_uas  )

static

Definition at line 625 of file pjsip_distributor.c.

{
    struct ast_sip_auth *fake_auth;
 
    fake_auth = ast_sorcery_alloc(ast_sip_get_sorcery(), SIP_SORCERY_AUTH_TYPE,
        "artificial");
    if (!fake_auth) {
        return NULL;
    }
 
    ast_string_field_set(fake_auth, realm, default_realm);
    ast_string_field_set(fake_auth, auth_user, "");
    ast_string_field_set(fake_auth, auth_pass, "");
 
    ast_sip_auth_digest_algorithms_vector_init("artificial",
        &fake_auth->supported_algorithms_uac, "UAC", default_algos_uac);
 
    ast_sip_auth_digest_algorithms_vector_init("artificial",
        &fake_auth->supported_algorithms_uas, "UAS", default_algos_uas);
 
    fake_auth->type = AST_SIP_AUTH_TYPE_ARTIFICIAL;
 
    return fake_auth;
}

References ast_sip_auth_digest_algorithms_vector_init(), AST_SIP_AUTH_TYPE_ARTIFICIAL, ast_sip_get_sorcery(), ast_sorcery_alloc(), ast_string_field_set, ast_sip_auth::auth_pass, ast_sip_auth::auth_user, default_realm, NULL, ast_sip_auth::realm, SIP_SORCERY_AUTH_TYPE, ast_sip_auth::supported_algorithms_uac, ast_sip_auth::supported_algorithms_uas, and ast_sip_auth::type.

Referenced by create_artificial_auth().

AO2_GLOBAL_OBJ_STATIC()

static AO2_GLOBAL_OBJ_STATIC ( artificial_auth  )

static

apply_acls()

static void apply_acls ( pjsip_rx_data *  rdata )

static

Definition at line 747 of file pjsip_distributor.c.

{
    struct ast_sip_endpoint *endpoint;
 
    /* Is the endpoint allowed with the source or contact address? */
    endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
    if (endpoint != artificial_endpoint
        && (apply_endpoint_acl(rdata, endpoint)
            || apply_endpoint_contact_acl(rdata, endpoint))) {
        ast_debug(1, "Endpoint '%s' not allowed by ACL\n",
            ast_sorcery_object_get_id(endpoint));
 
        /* Replace the rdata endpoint with the artificial endpoint. */
        ao2_replace(rdata->endpt_info.mod_data[endpoint_mod.id], artificial_endpoint);
    }
}

References ao2_replace, apply_endpoint_acl(), apply_endpoint_contact_acl(), artificial_endpoint, ast_debug, ast_sorcery_object_get_id(), and endpoint_mod.

Referenced by endpoint_lookup().

apply_endpoint_acl()

static int apply_endpoint_acl ( pjsip_rx_data *  rdata, struct ast_sip_endpoint *  endpoint  )

static

Definition at line 852 of file pjsip_distributor.c.

{
    struct ast_sockaddr addr;
 
    if (ast_acl_list_is_empty(endpoint->acl)) {
        return 0;
    }
 
    memset(&addr, 0, sizeof(addr));
    ast_sockaddr_parse(&addr, rdata->pkt_info.src_name, PARSE_PORT_FORBID);
    ast_sockaddr_set_port(&addr, rdata->pkt_info.src_port);
 
    if (ast_apply_acl(endpoint->acl, &addr, "SIP ACL: ") != AST_SENSE_ALLOW) {
        log_failed_request(rdata, "Not match Endpoint ACL", 0, 0);
        ast_sip_report_failed_acl(endpoint, rdata, "not_match_endpoint_acl");
        return 1;
    }
    return 0;
}

References ast_sip_endpoint::acl, ast_acl_list_is_empty(), ast_apply_acl(), AST_SENSE_ALLOW, ast_sip_report_failed_acl(), ast_sockaddr_parse(), ast_sockaddr_set_port, log_failed_request(), and PARSE_PORT_FORBID.

Referenced by apply_acls().

apply_endpoint_contact_acl()

static int apply_endpoint_contact_acl ( pjsip_rx_data *  rdata, struct ast_sip_endpoint *  endpoint  )

static

Definition at line 891 of file pjsip_distributor.c.

{
    int num_contact_addrs;
    int forbidden = 0;
    struct ast_sockaddr *contact_addrs;
    int i;
    pjsip_contact_hdr *contact = (pjsip_contact_hdr *)&rdata->msg_info.msg->hdr;
 
    if (ast_acl_list_is_empty(endpoint->contact_acl)) {
        return 0;
    }
 
    while ((contact = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT, contact->next))) {
        num_contact_addrs = extract_contact_addr(contact, &contact_addrs);
        if (num_contact_addrs <= 0) {
            continue;
        }
        for (i = 0; i < num_contact_addrs; ++i) {
            if (ast_apply_acl(endpoint->contact_acl, &contact_addrs[i], "SIP Contact ACL: ") != AST_SENSE_ALLOW) {
                log_failed_request(rdata, "Not match Endpoint Contact ACL", 0, 0);
                ast_sip_report_failed_acl(endpoint, rdata, "not_match_endpoint_contact_acl");
                forbidden = 1;
                break;
            }
        }
        ast_free(contact_addrs);
        if (forbidden) {
            /* No use checking other contacts if we already have failed ACL check */
            break;
        }
    }
 
    return forbidden;
}

References ast_acl_list_is_empty(), ast_apply_acl(), ast_free, AST_SENSE_ALLOW, ast_sip_report_failed_acl(), ast_sip_endpoint::contact_acl, extract_contact_addr(), and log_failed_request().

Referenced by apply_acls().

ast_pjsip_rdata_get_endpoint()

struct ast_sip_endpoint * ast_pjsip_rdata_get_endpoint

(

pjsip_rx_data *

rdata

)

Get the looked-up endpoint on an out-of dialog request or response.

The function may ONLY be called on out-of-dialog requests or responses. For in-dialog requests and responses, it is required that the user of the dialog has the looked-up endpoint stored locally.

This function should never return NULL if the message is out-of-dialog. It will always return NULL if the message is in-dialog.

This function will increase the reference count of the returned endpoint by one. Release your reference using the ao2_ref function when finished.

Parameters

rdata

Out-of-dialog request or response

Returns

The looked up endpoint

Definition at line 1015 of file pjsip_distributor.c.

{
    struct ast_sip_endpoint *endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
    if (endpoint) {
        ao2_ref(endpoint, +1);
    }
    return endpoint;
}

References ao2_ref, and endpoint_mod.

Referenced by authenticate(), handle_new_invite_request(), maintenance_on_rx_request(), nat_on_rx_message(), options_on_rx_request(), pubsub_on_rx_mwi_notify_request(), pubsub_on_rx_publish_request(), pubsub_on_rx_refresh(), pubsub_on_rx_subscribe_request(), registrar_on_rx_request(), rx_data_to_ast_msg(), send_options_response(), send_response(), and supplement_on_rx_request().

ast_sip_destroy_distributor()

void ast_sip_destroy_distributor

(

void

)

Definition at line 1365 of file pjsip_distributor.c.

{
    ast_cli_unregister_multiple(cli_commands, ARRAY_LEN(cli_commands));
    ast_sip_unregister_cli_formatter(unid_formatter);
 
    ast_sip_unregister_service(&auth_mod);
    ast_sip_unregister_service(&endpoint_mod);
    ast_sip_unregister_service(&distributor_mod);
 
    ao2_global_obj_release(artificial_auth);
    ao2_cleanup(artificial_endpoint);
 
    ast_sorcery_observer_remove(ast_sip_get_sorcery(), "global", &global_observer);
 
    if (prune_context) {
        ast_sched_context_destroy(prune_context);
    }
 
    distributor_pool_shutdown();
 
    ao2_cleanup(dialog_associations);
    ao2_cleanup(unidentified_requests);
}

References ao2_cleanup, ao2_global_obj_release, ARRAY_LEN, artificial_endpoint, ast_cli_unregister_multiple(), ast_sched_context_destroy(), ast_sip_get_sorcery(), ast_sip_unregister_cli_formatter(), ast_sip_unregister_service(), ast_sorcery_observer_remove(), auth_mod, cli_commands, dialog_associations, distributor_mod, distributor_pool_shutdown(), endpoint_mod, global_observer, prune_context, unid_formatter, and unidentified_requests.

Referenced by ast_sip_initialize_distributor(), and unload_pjsip().

ast_sip_get_artificial_auth()

struct ast_sip_auth * ast_sip_get_artificial_auth

(

void

)

Retrieves a reference to the artificial auth.

Return values

The	artificial auth

Definition at line 677 of file pjsip_distributor.c.

{
    return ao2_global_obj_ref(artificial_auth);
}

References ao2_global_obj_ref.

Referenced by digest_check_auth().

ast_sip_get_artificial_endpoint()

struct ast_sip_endpoint * ast_sip_get_artificial_endpoint

(

void

)

Retrieves a reference to the artificial endpoint.

Return values

The	artificial endpoint

Definition at line 700 of file pjsip_distributor.c.

{
    ao2_ref(artificial_endpoint, +1);
    return artificial_endpoint;
}

References ao2_ref, and artificial_endpoint.

Referenced by digest_check_auth(), digest_requires_authentication(), endpoint_lookup(), and get_account_id().

ast_sip_initialize_distributor()

int ast_sip_initialize_distributor

(

void

)

Definition at line 1291 of file pjsip_distributor.c.

{
    unidentified_requests = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_RWLOCK, 0,
        DEFAULT_SUSPECTS_BUCKETS, suspects_hash, NULL, suspects_compare);
    if (!unidentified_requests) {
        return -1;
    }
 
    dialog_associations = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_RWLOCK, 0,
        DIALOG_ASSOCIATIONS_BUCKETS, dialog_associations_hash, NULL,
        dialog_associations_cmp);
    if (!dialog_associations) {
        ast_sip_destroy_distributor();
        return -1;
    }
 
    if (distributor_pool_setup()) {
        ast_sip_destroy_distributor();
        return -1;
    }
 
    prune_context = ast_sched_context_create();
    if (!prune_context) {
        ast_sip_destroy_distributor();
        return -1;
    }
 
    if (ast_sched_start_thread(prune_context)) {
        ast_sip_destroy_distributor();
        return -1;
    }
 
    ast_sorcery_observer_add(ast_sip_get_sorcery(), "global", &global_observer);
    ast_sorcery_reload_object(ast_sip_get_sorcery(), "global");
 
    if (create_artificial_endpoint() || create_artificial_auth()) {
        ast_sip_destroy_distributor();
        return -1;
    }
 
    if (ast_sip_register_service(&distributor_mod)) {
        ast_sip_destroy_distributor();
        return -1;
    }
    if (ast_sip_register_service(&endpoint_mod)) {
        ast_sip_destroy_distributor();
        return -1;
    }
    if (ast_sip_register_service(&auth_mod)) {
        ast_sip_destroy_distributor();
        return -1;
    }
 
    unid_formatter = ao2_alloc_options(sizeof(struct ast_sip_cli_formatter_entry), NULL,
        AO2_ALLOC_OPT_LOCK_NOLOCK);
    if (!unid_formatter) {
        ast_sip_destroy_distributor();
        ast_log(LOG_ERROR, "Unable to allocate memory for unid_formatter\n");
        return -1;
    }
    unid_formatter->name = "unidentified_request";
    unid_formatter->print_header = cli_unid_print_header;
    unid_formatter->print_body = cli_unid_print_body;
    unid_formatter->get_container = cli_unid_get_container;
    unid_formatter->iterate = cli_unid_iterate;
    unid_formatter->get_id = cli_unid_get_id;
    unid_formatter->retrieve_by_id = cli_unid_retrieve_by_id;
    ast_sip_register_cli_formatter(unid_formatter);
 
    ast_cli_register_multiple(cli_commands, ARRAY_LEN(cli_commands));
 
    return 0;
}

References AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, ao2_alloc_options, ao2_container_alloc_hash, ARRAY_LEN, ast_cli_register_multiple, ast_log, ast_sched_context_create(), ast_sched_start_thread(), ast_sip_destroy_distributor(), ast_sip_get_sorcery(), ast_sip_register_cli_formatter(), ast_sip_register_service(), ast_sorcery_observer_add(), ast_sorcery_reload_object(), auth_mod, cli_commands, cli_unid_get_container(), cli_unid_get_id(), cli_unid_iterate(), cli_unid_print_body(), cli_unid_print_header(), cli_unid_retrieve_by_id(), create_artificial_auth(), create_artificial_endpoint(), DEFAULT_SUSPECTS_BUCKETS, dialog_associations, DIALOG_ASSOCIATIONS_BUCKETS, dialog_associations_cmp(), dialog_associations_hash(), distributor_mod, distributor_pool_setup(), endpoint_mod, ast_sip_cli_formatter_entry::get_container, ast_sip_cli_formatter_entry::get_id, global_observer, ast_sip_cli_formatter_entry::iterate, LOG_ERROR, ast_sip_cli_formatter_entry::name, NULL, ast_sip_cli_formatter_entry::print_body, ast_sip_cli_formatter_entry::print_header, prune_context, ast_sip_cli_formatter_entry::retrieve_by_id, suspects_compare(), suspects_hash(), unid_formatter, and unidentified_requests.

Referenced by load_module().

authenticate()

static pj_bool_t authenticate ( pjsip_rx_data *  rdata )

static

Definition at line 926 of file pjsip_distributor.c.

{
    RAII_VAR(struct ast_sip_endpoint *, endpoint, ast_pjsip_rdata_get_endpoint(rdata), ao2_cleanup);
    int is_ack = rdata->msg_info.msg->line.req.method.id == PJSIP_ACK_METHOD;
 
    ast_assert(endpoint != NULL);
 
    if (is_ack) {
        return PJ_FALSE;
    }
 
    if (ast_sip_requires_authentication(endpoint, rdata)) {
        pjsip_tx_data *tdata;
        struct unidentified_request *unid;
 
        pjsip_endpt_create_response(ast_sip_get_pjsip_endpoint(), rdata, 401, NULL, &tdata);
        switch (ast_sip_check_authentication(endpoint, rdata, tdata)) {
        case AST_SIP_AUTHENTICATION_CHALLENGE:
            /* Send the 401 we created for them */
            ast_sip_report_auth_challenge_sent(endpoint, rdata, tdata);
            if (pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL) != PJ_SUCCESS) {
                pjsip_tx_data_dec_ref(tdata);
            }
            return PJ_TRUE;
        case AST_SIP_AUTHENTICATION_SUCCESS:
            /* See note in endpoint_lookup about not holding an unnecessary write lock */
            unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
            if (unid) {
                ao2_unlink(unidentified_requests, unid);
                ao2_ref(unid, -1);
            }
            ast_sip_report_auth_success(endpoint, rdata);
            break;
        case AST_SIP_AUTHENTICATION_FAILED:
            log_failed_request(rdata, "Failed to authenticate", 0, 0);
            ast_sip_report_auth_failed_challenge_response(endpoint, rdata);
            if (pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL) != PJ_SUCCESS) {
                pjsip_tx_data_dec_ref(tdata);
            }
            return PJ_TRUE;
        case AST_SIP_AUTHENTICATION_ERROR:
            log_failed_request(rdata, "Error to authenticate", 0, 0);
            ast_sip_report_auth_failed_challenge_response(endpoint, rdata);
            pjsip_tx_data_dec_ref(tdata);
            pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
            return PJ_TRUE;
        }
        pjsip_tx_data_dec_ref(tdata);
    } else if (endpoint == artificial_endpoint) {
        /* Uh. Oh.  The artificial endpoint couldn't challenge so block the request. */
        pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
        return PJ_TRUE;
    }
 
    return PJ_FALSE;
}

References ao2_cleanup, ao2_find, ao2_ref, ao2_unlink, artificial_endpoint, ast_assert, ast_pjsip_rdata_get_endpoint(), AST_SIP_AUTHENTICATION_CHALLENGE, AST_SIP_AUTHENTICATION_ERROR, AST_SIP_AUTHENTICATION_FAILED, AST_SIP_AUTHENTICATION_SUCCESS, ast_sip_check_authentication(), ast_sip_get_pjsip_endpoint(), ast_sip_report_auth_challenge_sent(), ast_sip_report_auth_failed_challenge_response(), ast_sip_report_auth_success(), ast_sip_requires_authentication(), log_failed_request(), NULL, OBJ_SEARCH_KEY, RAII_VAR, and unidentified_requests.

buf_hash()

static int buf_hash ( const char *  pos, size_t  len  )

static

Definition at line 207 of file pjsip_distributor.c.

{
    return buf_hash_add(pos, len, 5381);
}

References buf_hash_add(), and len().

Referenced by dialog_associations_hash().

buf_hash_add()

static int buf_hash_add ( const char *  pos, size_t  len, int  hash  )

static

Definition at line 181 of file pjsip_distributor.c.

{
    while (len--) {
        hash = hash * 33 ^ *pos++;
    }
 
    return hash;
}

References len().

Referenced by buf_hash(), and pjstr_hash_add().

check_endpoint()

static void check_endpoint ( pjsip_rx_data *  rdata, struct unidentified_request *  unid, const char *  name  )

static

Definition at line 729 of file pjsip_distributor.c.

{
    int64_t ms = ast_tvdiff_ms(ast_tvnow(), unid->first_seen);
 
    ao2_wrlock(unid);
    unid->count++;
 
    if (ms < (unidentified_period * 1000) && unid->count >= unidentified_count) {
        log_failed_request(rdata, "No matching endpoint found", unid->count, ms);
        ast_sip_report_invalid_endpoint(name, rdata);
    }
    ao2_unlock(unid);
}

References ao2_unlock, ao2_wrlock, ast_sip_report_invalid_endpoint(), ast_tvdiff_ms(), ast_tvnow(), unidentified_request::count, unidentified_request::first_seen, log_failed_request(), name, unidentified_count, and unidentified_period.

Referenced by endpoint_lookup().

clean_task()

static int clean_task ( const void *  data )

static

Definition at line 1206 of file pjsip_distributor.c.

{
    return 0;
}

Referenced by global_loaded().

cli_unid_get_container()

static struct ao2_container * cli_unid_get_container ( const char *  regex )

static

Definition at line 1097 of file pjsip_distributor.c.

{
    struct ao2_container *s_container;
 
    s_container = ao2_container_alloc_list(AO2_ALLOC_OPT_LOCK_NOLOCK, 0,
        suspects_sort, suspects_compare);
    if (!s_container) {
        return NULL;
    }
 
    if (ao2_container_dup(s_container, unidentified_requests, 0)) {
        ao2_ref(s_container, -1);
        return NULL;
    }
 
    return s_container;
}

References AO2_ALLOC_OPT_LOCK_NOLOCK, ao2_container_alloc_list, ao2_container_dup(), ao2_ref, NULL, suspects_compare(), suspects_sort(), and unidentified_requests.

Referenced by ast_sip_initialize_distributor().

cli_unid_get_id()

static const char * cli_unid_get_id ( const void *  obj )

static

Definition at line 1127 of file pjsip_distributor.c.

{
    const struct unidentified_request *unid = obj;
 
    return unid->src_name;
}

References unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor().

cli_unid_iterate()

static int cli_unid_iterate ( void *  container, ao2_callback_fn  callback, void *  args  )

static

Definition at line 1115 of file pjsip_distributor.c.

{
    ao2_callback(container, 0, callback, args);
 
    return 0;
}

References ao2_callback, args, callback(), and container.

Referenced by ast_sip_initialize_distributor().

cli_unid_print_body()

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

static

Definition at line 1151 of file pjsip_distributor.c.

{
    struct unidentified_request *unid = obj;
    struct ast_sip_cli_context *context = arg;
    int indent;
    int flexwidth;
    int64_t ms = ast_tvdiff_ms(ast_tvnow(), unid->first_seen);
 
    ast_assert(context->output_buffer != NULL);
 
    indent = CLI_INDENT_TO_SPACES(context->indent_level);
    flexwidth = CLI_LAST_TABSTOP - 4;
 
    ast_str_append(&context->output_buffer, 0, "%*s:  %-*.*s  %7d %10.3f\n",
        indent,
        "Request",
        flexwidth, flexwidth,
        unid->src_name, unid->count,  ms / 1000.0);
 
    return 0;
}

References ast_assert, ast_str_append(), ast_tvdiff_ms(), ast_tvnow(), CLI_INDENT_TO_SPACES, CLI_LAST_TABSTOP, unidentified_request::count, unidentified_request::first_seen, NULL, and unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor().

cli_unid_print_header()

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

static

Definition at line 1134 of file pjsip_distributor.c.

{
    struct ast_sip_cli_context *context = arg;
    RAII_VAR(struct ast_sip_cli_formatter_entry *, formatter_entry, NULL, ao2_cleanup);
 
    int indent = CLI_INDENT_TO_SPACES(context->indent_level);
    int filler = CLI_LAST_TABSTOP - indent - 7;
 
    ast_assert(context->output_buffer != NULL);
 
    ast_str_append(&context->output_buffer, 0,
        "%*s:  <IP Address%*.*s>  <Count> <Age(sec)>\n",
        indent, "Request", filler, filler, CLI_HEADER_FILLER);
 
    return 0;
}

References ao2_cleanup, ast_assert, ast_str_append(), CLI_HEADER_FILLER, CLI_INDENT_TO_SPACES, CLI_LAST_TABSTOP, NULL, and RAII_VAR.

Referenced by ast_sip_initialize_distributor().

cli_unid_retrieve_by_id()

static void * cli_unid_retrieve_by_id ( const char *  id )

static

Definition at line 1122 of file pjsip_distributor.c.

{
    return ao2_find(unidentified_requests, id, OBJ_SEARCH_KEY);
}

References ao2_find, OBJ_SEARCH_KEY, and unidentified_requests.

Referenced by ast_sip_initialize_distributor().

create_artificial_auth()

static int create_artificial_auth ( void  )

static

Definition at line 653 of file pjsip_distributor.c.

{
    char default_realm[AST_SIP_AUTH_MAX_REALM_LENGTH + 1];
    struct ast_sip_auth *fake_auth;
    char default_algos_uac[AST_SIP_AUTH_MAX_SUPPORTED_ALGORITHMS_LENGTH + 1];
    char default_algos_uas[AST_SIP_AUTH_MAX_SUPPORTED_ALGORITHMS_LENGTH + 1];
 
    ast_sip_get_default_realm(default_realm, sizeof(default_realm));
    ast_sip_get_default_auth_algorithms_uac(default_algos_uac,
        sizeof(default_algos_uac));
    ast_sip_get_default_auth_algorithms_uas(default_algos_uas,
        sizeof(default_algos_uas));
 
    fake_auth = alloc_artificial_auth(default_realm, default_algos_uac,
            default_algos_uas);
    if (!fake_auth) {
        ast_log(LOG_ERROR, "Unable to create artificial auth\n");
        return -1;
    }
    ao2_global_obj_replace_unref(artificial_auth, fake_auth);
    ao2_cleanup(fake_auth);
    return 0;
}

References alloc_artificial_auth(), ao2_cleanup, ao2_global_obj_replace_unref, ast_log, AST_SIP_AUTH_MAX_REALM_LENGTH, AST_SIP_AUTH_MAX_SUPPORTED_ALGORITHMS_LENGTH, ast_sip_get_default_auth_algorithms_uac(), ast_sip_get_default_auth_algorithms_uas(), ast_sip_get_default_realm(), default_realm, and LOG_ERROR.

Referenced by ast_sip_initialize_distributor(), and global_loaded().

create_artificial_endpoint()

static int create_artificial_endpoint ( void  )

static

Definition at line 684 of file pjsip_distributor.c.

{
    artificial_endpoint = ast_sorcery_alloc(ast_sip_get_sorcery(), "endpoint", NULL);
    if (!artificial_endpoint) {
        return -1;
    }
 
    AST_VECTOR_INIT(&artificial_endpoint->inbound_auths, 1);
    /* Pushing a bogus value into the vector will ensure that
     * the proper size of the vector is returned. This value is
     * not actually used anywhere
     */
    AST_VECTOR_APPEND(&artificial_endpoint->inbound_auths, ast_strdup("artificial-auth"));
    return 0;
}

References artificial_endpoint, ast_sip_get_sorcery(), ast_sorcery_alloc(), ast_strdup, AST_VECTOR_APPEND, AST_VECTOR_INIT, ast_sip_endpoint::inbound_auths, and NULL.

Referenced by ast_sip_initialize_distributor().

dialog_associations_cmp()

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

static

Definition at line 236 of file pjsip_distributor.c.

{
    const struct distributor_dialog_data *object_left = obj;
    const struct distributor_dialog_data *object_right = arg;
    const pjsip_dialog *right_key = arg;
    int cmp = 0;
 
    switch (flags & OBJ_SEARCH_MASK) {
    case OBJ_SEARCH_OBJECT:
        right_key = object_right->dlg;
        /* Fall through */
    case OBJ_SEARCH_KEY:
        if (object_left->dlg == right_key) {
            cmp = CMP_MATCH;
        }
        break;
    case OBJ_SEARCH_PARTIAL_KEY:
        /* There is no such thing for this container. */
        ast_assert(0);
        break;
    default:
        cmp = 0;
        break;
    }
    return cmp;
}

References ast_assert, CMP_MATCH, distributor_dialog_data::dlg, OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, and OBJ_SEARCH_PARTIAL_KEY.

Referenced by ast_sip_initialize_distributor().

dialog_associations_hash()

static int dialog_associations_hash ( const void *  obj, int  flags  )

static

Definition at line 212 of file pjsip_distributor.c.

{
    const struct distributor_dialog_data *object;
    union {
        const pjsip_dialog *dlg;
        const char buf[sizeof(pjsip_dialog *)];
    } key;
 
    switch (flags & OBJ_SEARCH_MASK) {
    case OBJ_SEARCH_KEY:
        key.dlg = obj;
        break;
    case OBJ_SEARCH_OBJECT:
        object = obj;
        key.dlg = object->dlg;
        break;
    default:
        /* Hash can only work on something with a full key. */
        ast_assert(0);
        return 0;
    }
    return ast_str_hash_restrict(buf_hash(key.buf, sizeof(key.buf)));
}

References ast_assert, ast_str_hash_restrict(), buf, buf_hash(), distributor_dialog_data::dlg, OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, and OBJ_SEARCH_OBJECT.

Referenced by ast_sip_initialize_distributor().

distribute()

static int distribute ( void *  data )

static

Definition at line 989 of file pjsip_distributor.c.

{
    static pjsip_process_rdata_param param = {
        .start_mod = &distributor_mod,
        .idx_after_start = 1,
    };
    pj_bool_t handled = PJ_FALSE;
    pjsip_rx_data *rdata = data;
    int is_request = rdata->msg_info.msg->type == PJSIP_REQUEST_MSG;
    int is_ack = is_request ? rdata->msg_info.msg->line.req.method.id == PJSIP_ACK_METHOD : 0;
    struct ast_sip_endpoint *endpoint;
 
    pjsip_endpt_process_rx_data(ast_sip_get_pjsip_endpoint(), rdata, &param, &handled);
    if (!handled && is_request && !is_ack) {
        pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 501, NULL, NULL, NULL);
    }
 
    /* The endpoint_mod stores an endpoint reference in the mod_data of rdata. This
     * is the only appropriate spot to actually decrement the reference.
     */
    endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
    ao2_cleanup(endpoint);
    pjsip_rx_data_free_cloned(rdata);
    return 0;
}

References ao2_cleanup, ast_sip_get_pjsip_endpoint(), distributor_mod, endpoint_mod, and NULL.

Referenced by distributor().

distributor()

static pj_bool_t distributor ( pjsip_rx_data *  rdata )

static

Definition at line 516 of file pjsip_distributor.c.

{
    pjsip_dialog *dlg;
    struct distributor_dialog_data *dist = NULL;
    struct ast_taskprocessor *serializer = NULL;
    pjsip_rx_data *clone;
 
    if (!ast_fully_booted) {
        /*
         * Ignore everything until we are fully booted.  Let the
         * peer retransmit messages until we are ready.
         */
        return PJ_TRUE;
    }
 
    dlg = find_dialog(rdata);
    if (dlg) {
        ast_debug(3, "Searching for serializer associated with dialog %s for %s\n",
            dlg->obj_name, pjsip_rx_data_get_info(rdata));
        dist = ao2_find(dialog_associations, dlg, OBJ_SEARCH_KEY);
        if (dist) {
            ao2_lock(dist);
            serializer = ao2_bump(dist->serializer);
            ao2_unlock(dist);
            if (serializer) {
                ast_debug(3, "Found serializer %s associated with dialog %s\n",
                    ast_taskprocessor_name(serializer), dlg->obj_name);
            }
        }
    }
 
    if (serializer) {
        /* We have a serializer so we know where to send the message. */
    } else if (rdata->msg_info.msg->type == PJSIP_RESPONSE_MSG) {
        ast_debug(3, "No dialog serializer for %s.  Using request transaction as basis.\n",
            pjsip_rx_data_get_info(rdata));
        serializer = find_request_serializer(rdata);
        if (!serializer) {
            /*
             * Pick a serializer for the unmatched response.
             * We couldn't determine what serializer originally
             * sent the request or the serializer is gone.
             */
            serializer = ast_sip_get_distributor_serializer(rdata);
        }
    } else if (!pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_cancel_method)
        || !pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_bye_method)) {
        /* We have a BYE or CANCEL request without a serializer. */
        pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata,
            PJSIP_SC_CALL_TSX_DOES_NOT_EXIST, NULL, NULL, NULL);
        ao2_cleanup(dist);
        return PJ_TRUE;
    } else {
        if ((overload_trigger == TASKPROCESSOR_OVERLOAD_TRIGGER_GLOBAL &&
            ast_taskprocessor_alert_get())
            || (overload_trigger == TASKPROCESSOR_OVERLOAD_TRIGGER_PJSIP_ONLY &&
            ast_taskprocessor_get_subsystem_alert("pjsip"))) {
            /*
             * When taskprocessors get backed up, there is a good chance that
             * we are being overloaded and need to defer adding new work to
             * the system.  To defer the work we will ignore the request and
             * rely on the peer's transport layer to retransmit the message.
             * We usually work off the overload within a few seconds.
             * If transport is non-UDP we send a 503 response instead.
             */
            switch (rdata->tp_info.transport->key.type) {
            case PJSIP_TRANSPORT_UDP6:
            case PJSIP_TRANSPORT_UDP:
                ast_debug(3, "Taskprocessor overload alert: Ignoring '%s'.\n",
                    pjsip_rx_data_get_info(rdata));
                break;
            default:
                ast_debug(3, "Taskprocessor overload on non-udp transport. Received:'%s'. "
                    "Responding with a 503.\n", pjsip_rx_data_get_info(rdata));
                pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata,
                    PJSIP_SC_SERVICE_UNAVAILABLE, NULL, NULL, NULL);
                break;
            }
            ao2_cleanup(dist);
            return PJ_TRUE;
        }
 
        /* Pick a serializer for the out-of-dialog request. */
        serializer = ast_sip_get_distributor_serializer(rdata);
    }
 
    if (pjsip_rx_data_clone(rdata, 0, &clone) != PJ_SUCCESS) {
        ast_taskprocessor_unreference(serializer);
        ao2_cleanup(dist);
        return PJ_TRUE;
    }
 
    if (dist) {
        ao2_lock(dist);
        clone->endpt_info.mod_data[endpoint_mod.id] = ao2_bump(dist->endpoint);
        ao2_unlock(dist);
        ao2_cleanup(dist);
    }
 
    if (ast_sip_push_task(serializer, distribute, clone)) {
        ao2_cleanup(clone->endpt_info.mod_data[endpoint_mod.id]);
        pjsip_rx_data_free_cloned(clone);
    }
 
    ast_taskprocessor_unreference(serializer);
 
    return PJ_TRUE;
}

References ao2_bump, ao2_cleanup, ao2_find, ao2_lock, ao2_unlock, ast_debug, ast_fully_booted, ast_sip_get_distributor_serializer(), ast_sip_get_pjsip_endpoint(), ast_sip_push_task, ast_taskprocessor_alert_get(), ast_taskprocessor_get_subsystem_alert(), ast_taskprocessor_name(), ast_taskprocessor_unreference(), dialog_associations, distribute(), distributor_dialog_data::endpoint, endpoint_mod, find_dialog(), find_request_serializer(), NULL, OBJ_SEARCH_KEY, overload_trigger, distributor_dialog_data::serializer, TASKPROCESSOR_OVERLOAD_TRIGGER_GLOBAL, and TASKPROCESSOR_OVERLOAD_TRIGGER_PJSIP_ONLY.

distributor_pool_setup()

static int distributor_pool_setup ( void  )

static

Definition at line 1274 of file pjsip_distributor.c.

{
    char tps_name[AST_TASKPROCESSOR_MAX_NAME + 1];
    int idx;
 
    for (idx = 0; idx < ARRAY_LEN(distributor_pool); ++idx) {
        /* Create name with seq number appended. */
        ast_taskprocessor_build_name(tps_name, sizeof(tps_name), "pjsip/distributor");
 
        distributor_pool[idx] = ast_sip_create_serializer(tps_name);
        if (!distributor_pool[idx]) {
            return -1;
        }
    }
    return 0;
}

References ARRAY_LEN, ast_sip_create_serializer(), ast_taskprocessor_build_name(), AST_TASKPROCESSOR_MAX_NAME, and distributor_pool.

Referenced by ast_sip_initialize_distributor().

distributor_pool_shutdown()

static void distributor_pool_shutdown ( void  )

static

Definition at line 1256 of file pjsip_distributor.c.

{
    int idx;
 
    for (idx = 0; idx < ARRAY_LEN(distributor_pool); ++idx) {
        ast_taskprocessor_unreference(distributor_pool[idx]);
        distributor_pool[idx] = NULL;
    }
}

References ARRAY_LEN, ast_taskprocessor_unreference(), distributor_pool, and NULL.

Referenced by ast_sip_destroy_distributor().

endpoint_lookup()

static pj_bool_t endpoint_lookup ( pjsip_rx_data *  rdata )

static

Definition at line 764 of file pjsip_distributor.c.

{
    struct ast_sip_endpoint *endpoint;
    struct unidentified_request *unid;
    int is_ack = rdata->msg_info.msg->line.req.method.id == PJSIP_ACK_METHOD;
 
    endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
    if (endpoint) {
        /*
         * ao2_find with OBJ_UNLINK always write locks the container before even searching
         * for the object.  Since the majority case is that the object won't be found, do
         * the find without OBJ_UNLINK to prevent the unnecessary write lock, then unlink
         * if needed.
         */
        unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
        if (unid) {
            ao2_unlink(unidentified_requests, unid);
            ao2_ref(unid, -1);
        }
        apply_acls(rdata);
        return PJ_FALSE;
    }
 
    endpoint = ast_sip_identify_endpoint(rdata);
    if (endpoint) {
        unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
        if (unid) {
            ao2_unlink(unidentified_requests, unid);
            ao2_ref(unid, -1);
        }
    }
 
    if (!endpoint) {
        /* always use an artificial endpoint - per discussion no reason
           to have "alwaysauthreject" as an option.  It is felt using it
           was a bug fix and it is not needed since we are not worried about
           breaking old stuff and we really don't want to enable the discovery
           of SIP accounts */
        endpoint = ast_sip_get_artificial_endpoint();
    }
 
    /* endpoint ref held by mod_data[] */
    rdata->endpt_info.mod_data[endpoint_mod.id] = endpoint;
 
    if (endpoint == artificial_endpoint && !is_ack) {
        char name[AST_UUID_STR_LEN] = "";
        pjsip_uri *from = rdata->msg_info.from->uri;
 
        if (ast_sip_is_allowed_uri(from)) {
            ast_copy_pj_str(name, ast_sip_pjsip_uri_get_username(from), sizeof(name));
        }
 
        unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
        if (unid) {
            check_endpoint(rdata, unid, name);
            ao2_ref(unid, -1);
        } else if (using_auth_username) {
            ao2_wrlock(unidentified_requests);
            /* Checking again with the write lock held allows us to eliminate the DUPS_REPLACE and sort_fn */
            unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name,
                OBJ_SEARCH_KEY | OBJ_NOLOCK);
            if (unid) {
                check_endpoint(rdata, unid, name);
            } else {
                unid = ao2_alloc_options(sizeof(*unid) + strlen(rdata->pkt_info.src_name) + 1,
                    NULL, AO2_ALLOC_OPT_LOCK_RWLOCK);
                if (!unid) {
                    ao2_unlock(unidentified_requests);
                    pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
                    return PJ_TRUE;
                }
                strcpy(unid->src_name, rdata->pkt_info.src_name); /* Safe */
                unid->first_seen = ast_tvnow();
                unid->count = 1;
                ao2_link_flags(unidentified_requests, unid, OBJ_NOLOCK);
            }
            ao2_ref(unid, -1);
            ao2_unlock(unidentified_requests);
        } else {
            log_failed_request(rdata, "No matching endpoint found", 0, 0);
            ast_sip_report_invalid_endpoint(name, rdata);
        }
    }
 
    apply_acls(rdata);
    return PJ_FALSE;
}

References AO2_ALLOC_OPT_LOCK_RWLOCK, ao2_alloc_options, ao2_find, ao2_link_flags, ao2_ref, ao2_unlink, ao2_unlock, ao2_wrlock, apply_acls(), artificial_endpoint, ast_copy_pj_str(), ast_sip_get_artificial_endpoint(), ast_sip_get_pjsip_endpoint(), ast_sip_identify_endpoint(), ast_sip_is_allowed_uri(), ast_sip_pjsip_uri_get_username(), ast_sip_report_invalid_endpoint(), ast_tvnow(), AST_UUID_STR_LEN, check_endpoint(), unidentified_request::count, endpoint_mod, unidentified_request::first_seen, log_failed_request(), name, NULL, OBJ_NOLOCK, OBJ_SEARCH_KEY, unidentified_request::src_name, unidentified_requests, and using_auth_username.

expire_requests()

static int expire_requests ( void *  object, void *  arg, int  flags  )

static

Definition at line 1182 of file pjsip_distributor.c.

{
    struct unidentified_request *unid = object;
    int *maxage = arg;
    int64_t ms = ast_tvdiff_ms(ast_tvnow(), unid->first_seen);
 
    if (ms > (*maxage) * 2 * 1000) {
        return CMP_MATCH;
    }
 
    return 0;
}

References ast_tvdiff_ms(), ast_tvnow(), CMP_MATCH, and unidentified_request::first_seen.

Referenced by prune_task().

extract_contact_addr()

static int extract_contact_addr ( pjsip_contact_hdr *  contact, struct ast_sockaddr **  addrs  )

static

Definition at line 872 of file pjsip_distributor.c.

{
    pjsip_sip_uri *sip_uri;
    char host[256];
 
    if (!contact || contact->star) {
        *addrs = NULL;
        return 0;
    }
 
    if (!PJSIP_URI_SCHEME_IS_SIP(contact->uri) && !PJSIP_URI_SCHEME_IS_SIPS(contact->uri)) {
        *addrs = NULL;
        return 0;
    }
    sip_uri = pjsip_uri_get_uri(contact->uri);
    ast_copy_pj_str(host, &sip_uri->host, sizeof(host));
    return ast_sockaddr_resolve(addrs, host, PARSE_PORT_FORBID, AST_AF_UNSPEC);
}

References AST_AF_UNSPEC, ast_copy_pj_str(), ast_sockaddr_resolve(), NULL, and PARSE_PORT_FORBID.

Referenced by apply_endpoint_contact_acl().

find_dialog()

static pjsip_dialog * find_dialog ( pjsip_rx_data *  rdata )

static

Definition at line 336 of file pjsip_distributor.c.

{
    pj_str_t tsx_key;
    pjsip_transaction *tsx;
    pjsip_dialog *dlg;
    pj_str_t *local_tag;
    pj_str_t *remote_tag;
 
    if (!rdata->msg_info.msg) {
        return NULL;
    }
 
    if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) {
        local_tag = &rdata->msg_info.to->tag;
        remote_tag = &rdata->msg_info.from->tag;
    } else {
        local_tag = &rdata->msg_info.from->tag;
        remote_tag = &rdata->msg_info.to->tag;
    }
 
    /* We can only call the convenient method for
     *  1) responses
     *  2) non-CANCEL requests
     *  3) CANCEL requests with a to-tag
     */
    if (rdata->msg_info.msg->type == PJSIP_RESPONSE_MSG ||
            pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_cancel_method) ||
            rdata->msg_info.to->tag.slen != 0) {
        dlg = pjsip_ua_find_dialog(&rdata->msg_info.cid->id, local_tag,
                remote_tag, PJ_FALSE);
        if (dlg) {
            return dlg;
        }
    }
 
    /*
     * There may still be a matching dialog if this is
     * 1) an incoming CANCEL request without a to-tag
     * 2) an incoming response to a dialog-creating request.
     */
    if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) {
        /* CANCEL requests will need to match the INVITE we initially received. Any
         * other request type will either have been matched already or is not in
         * dialog
         */
        pjsip_tsx_create_key(rdata->tp_info.pool, &tsx_key, PJSIP_ROLE_UAS,
                pjsip_get_invite_method(), rdata);
    } else {
        pjsip_tsx_create_key(rdata->tp_info.pool, &tsx_key, PJSIP_ROLE_UAC,
                &rdata->msg_info.cseq->method, rdata);
    }
 
    tsx = pjsip_tsx_layer_find_tsx(&tsx_key, PJ_TRUE);
    if (!tsx) {
        ast_debug(3, "Could not find matching transaction for %s\n",
            pjsip_rx_data_get_info(rdata));
        return NULL;
    }
 
    dlg = pjsip_tsx_get_dlg(tsx);
 
#ifdef HAVE_PJ_TRANSACTION_GRP_LOCK
    pj_grp_lock_release(tsx->grp_lock);
#else
    pj_mutex_unlock(tsx->mutex);
#endif
 
    return dlg;
}

References ast_debug, and NULL.

Referenced by distributor().

find_request_serializer()

static struct ast_taskprocessor * find_request_serializer ( pjsip_rx_data *  rdata )

static

Definition at line 109 of file pjsip_distributor.c.

{
    struct ast_taskprocessor *serializer = NULL;
    pj_str_t tsx_key;
    pjsip_transaction *tsx;
 
    pjsip_tsx_create_key(rdata->tp_info.pool, &tsx_key, PJSIP_ROLE_UAC,
        &rdata->msg_info.cseq->method, rdata);
 
    tsx = pjsip_tsx_layer_find_tsx(&tsx_key, PJ_TRUE);
    if (!tsx) {
        ast_debug(1, "Could not find transaction for %s.\n",
            pjsip_rx_data_get_info(rdata));
        return NULL;
    }
    ast_debug(3, "Found transaction %s for %s.\n",
        tsx->obj_name, pjsip_rx_data_get_info(rdata));
 
    if (tsx->last_tx) {
        const char *serializer_name;
 
        serializer_name = tsx->last_tx->mod_data[distributor_mod.id];
        if (!ast_strlen_zero(serializer_name)) {
            serializer = ast_taskprocessor_get(serializer_name, TPS_REF_IF_EXISTS);
            if (serializer) {
                ast_debug(3, "Found serializer %s on transaction %s\n",
                        serializer_name, tsx->obj_name);
            }
        }
    }
 
#ifdef HAVE_PJ_TRANSACTION_GRP_LOCK
    pj_grp_lock_release(tsx->grp_lock);
#else
    pj_mutex_unlock(tsx->mutex);
#endif
 
    return serializer;
}

References ast_debug, ast_strlen_zero(), ast_taskprocessor_get(), distributor_mod, NULL, and TPS_REF_IF_EXISTS.

Referenced by distributor().

global_loaded()

static void global_loaded ( const char *  object_type )

static

Definition at line 1211 of file pjsip_distributor.c.

{
    char *identifier_order;
 
    /* Update using_auth_username */
    identifier_order = ast_sip_get_endpoint_identifier_order();
    if (identifier_order) {
        char *identify_method;
        char *io_copy = ast_strdupa(identifier_order);
        int new_using = 0;
 
        ast_free(identifier_order);
        while ((identify_method = ast_strip(strsep(&io_copy, ",")))) {
            if (!strcmp(identify_method, "auth_username")) {
                new_using = 1;
                break;
            }
        }
        using_auth_username = new_using;
    }
 
    create_artificial_auth();
 
    ast_sip_get_unidentified_request_thresholds(&unidentified_count, &unidentified_period, &unidentified_prune_interval);
 
    overload_trigger = ast_sip_get_taskprocessor_overload_trigger();
 
    /* Clean out the old task, if any */
    ast_sched_clean_by_callback(prune_context, prune_task, clean_task);
    /* Have to do something with the return value to shut up the stupid compiler. */
    if (ast_sched_add_variable(prune_context, unidentified_prune_interval * 1000, prune_task, NULL, 1) < 0) {
        return;
    }
}

References ast_free, ast_sched_add_variable(), ast_sched_clean_by_callback(), ast_sip_get_endpoint_identifier_order(), ast_sip_get_taskprocessor_overload_trigger(), ast_sip_get_unidentified_request_thresholds(), ast_strdupa, ast_strip(), clean_task(), create_artificial_auth(), NULL, overload_trigger, prune_context, prune_task(), strsep(), unidentified_count, unidentified_period, unidentified_prune_interval, and using_auth_username.

log_failed_request()

static void log_failed_request ( pjsip_rx_data *  rdata, char *  msg, unsigned int  count, unsigned int  period  )

static

Definition at line 706 of file pjsip_distributor.c.

{
    char from_buf[PJSIP_MAX_URL_SIZE];
    char callid_buf[PJSIP_MAX_URL_SIZE];
    char method_buf[PJSIP_MAX_URL_SIZE];
    char src_addr_buf[AST_SOCKADDR_BUFLEN];
    pjsip_uri_print(PJSIP_URI_IN_FROMTO_HDR, rdata->msg_info.from->uri, from_buf, PJSIP_MAX_URL_SIZE);
    ast_copy_pj_str(callid_buf, &rdata->msg_info.cid->id, PJSIP_MAX_URL_SIZE);
    ast_copy_pj_str(method_buf, &rdata->msg_info.msg->line.req.method.name, PJSIP_MAX_URL_SIZE);
    if (count) {
        ast_log(LOG_NOTICE, "Request '%s' from '%s' failed for '%s' (callid: %s) - %s"
            " after %u tries in %.3f ms\n",
            method_buf, from_buf,
            pj_sockaddr_print(&rdata->pkt_info.src_addr, src_addr_buf, sizeof(src_addr_buf), 3),
            callid_buf, msg, count, period / 1000.0);
    } else {
        ast_log(LOG_NOTICE, "Request '%s' from '%s' failed for '%s' (callid: %s) - %s\n",
            method_buf, from_buf,
            pj_sockaddr_print(&rdata->pkt_info.src_addr, src_addr_buf, sizeof(src_addr_buf), 3),
            callid_buf, msg);
    }
}

References ast_copy_pj_str(), ast_log, AST_SOCKADDR_BUFLEN, and LOG_NOTICE.

Referenced by apply_endpoint_acl(), apply_endpoint_contact_acl(), authenticate(), check_endpoint(), and endpoint_lookup().

pjstr_hash()

static int pjstr_hash ( pj_str_t *  str )

static

Definition at line 440 of file pjsip_distributor.c.

{
    return pjstr_hash_add(str, 5381);
}

References pjstr_hash_add(), and str.

Referenced by ast_sip_get_distributor_serializer(), and ast_sip_get_distributor_serializer_dialog().

pjstr_hash_add()

static int pjstr_hash_add ( pj_str_t *  str, int  hash  )

static

Definition at line 423 of file pjsip_distributor.c.

{
    return buf_hash_add(pj_strbuf(str), pj_strlen(str), hash);
}

References buf_hash_add(), and str.

Referenced by ast_sip_get_distributor_serializer(), ast_sip_get_distributor_serializer_dialog(), and pjstr_hash().

prune_task()

static int prune_task ( const void *  data )

static

Definition at line 1195 of file pjsip_distributor.c.

{
    unsigned int maxage;
 
    ast_sip_get_unidentified_request_thresholds(&unidentified_count, &unidentified_period, &unidentified_prune_interval);
    maxage = unidentified_period * 2;
    ao2_callback(unidentified_requests, OBJ_MULTIPLE | OBJ_NODATA | OBJ_UNLINK, expire_requests, &maxage);
 
    return unidentified_prune_interval * 1000;
}

References ao2_callback, ast_sip_get_unidentified_request_thresholds(), expire_requests(), OBJ_MULTIPLE, OBJ_NODATA, OBJ_UNLINK, unidentified_count, unidentified_period, unidentified_prune_interval, and unidentified_requests.

Referenced by global_loaded().

record_serializer()

static pj_status_t record_serializer ( pjsip_tx_data *  tdata )

static

Definition at line 74 of file pjsip_distributor.c.

{
    struct ast_taskprocessor *serializer;
 
    serializer = ast_taskpool_serializer_get_current();
    if (serializer) {
        const char *name;
 
        name = ast_taskprocessor_name(serializer);
        if (!ast_strlen_zero(name)
            && (!tdata->mod_data[distributor_mod.id]
                || strcmp(tdata->mod_data[distributor_mod.id], name))) {
            char *tdata_name;
 
            /* The serializer in use changed. */
            tdata_name = pj_pool_alloc(tdata->pool, strlen(name) + 1);
            strcpy(tdata_name, name);/* Safe */
 
            tdata->mod_data[distributor_mod.id] = tdata_name;
        }
    }
 
    return PJ_SUCCESS;
}

References ast_strlen_zero(), ast_taskpool_serializer_get_current(), ast_taskprocessor_name(), distributor_mod, and name.

suspects_compare()

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

static

Definition at line 1048 of file pjsip_distributor.c.

{
    const struct unidentified_request *object_left = obj;
    const struct unidentified_request *object_right = arg;
    const char *right_key = arg;
    int cmp = 0;
 
    switch (flags & OBJ_SEARCH_MASK) {
    case OBJ_SEARCH_OBJECT:
        right_key = object_right->src_name;
        /* Fall through */
    case OBJ_SEARCH_KEY:
        if (strcmp(object_left->src_name, right_key) == 0) {
            cmp = CMP_MATCH;
        }
        break;
    case OBJ_SEARCH_PARTIAL_KEY:
        if (strncmp(object_left->src_name, right_key, strlen(right_key)) == 0) {
            cmp = CMP_MATCH;
        }
        break;
    default:
        cmp = 0;
        break;
    }
    return cmp;
}

References CMP_MATCH, OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, OBJ_SEARCH_PARTIAL_KEY, and unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor(), and cli_unid_get_container().

suspects_hash()

static int suspects_hash ( const void *  obj, int  flags  )

static

Definition at line 1076 of file pjsip_distributor.c.

{
    const struct unidentified_request *object;
    const char *key;
 
    switch (flags & OBJ_SEARCH_MASK) {
    case OBJ_SEARCH_KEY:
        key = obj;
        break;
    case OBJ_SEARCH_OBJECT:
        object = obj;
        key = object->src_name;
        break;
    default:
        /* Hash can only work on something with a full key. */
        ast_assert(0);
        return 0;
    }
    return ast_str_hash(key);
}

References ast_assert, ast_str_hash(), OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, and unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor().

suspects_sort()

static int suspects_sort ( const void *  obj, const void *  arg, int  flags  )

static

Definition at line 1024 of file pjsip_distributor.c.

{
    const struct unidentified_request *object_left = obj;
    const struct unidentified_request *object_right = arg;
    const char *right_key = arg;
    int cmp;
 
    switch (flags & OBJ_SEARCH_MASK) {
    case OBJ_SEARCH_OBJECT:
        right_key = object_right->src_name;
        /* Fall through */
    case OBJ_SEARCH_KEY:
        cmp = strcmp(object_left->src_name, right_key);
        break;
    case OBJ_SEARCH_PARTIAL_KEY:
        cmp = strncmp(object_left->src_name, right_key, strlen(right_key));
        break;
    default:
        cmp = 0;
        break;
    }
    return cmp;
}

References OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, OBJ_SEARCH_PARTIAL_KEY, and unidentified_request::src_name.

Referenced by cli_unid_get_container().

Variable Documentation

artificial_endpoint

struct ast_sip_endpoint* artificial_endpoint = NULL

static

Definition at line 682 of file pjsip_distributor.c.

Referenced by apply_acls(), ast_sip_destroy_distributor(), ast_sip_get_artificial_endpoint(), authenticate(), create_artificial_endpoint(), digest_check_auth(), and endpoint_lookup().

auth_mod

pjsip_module auth_mod

static

Initial value:

= {
    .name = {"Request Authenticator", 21},
    .priority = PJSIP_MOD_PRIORITY_APPLICATION - 2,
    .on_rx_request = authenticate,
}

Definition at line 983 of file pjsip_distributor.c.

                               {
    .name = {"Request Authenticator", 21},
    .priority = PJSIP_MOD_PRIORITY_APPLICATION - 2,
    .on_rx_request = authenticate,
};

Referenced by ast_sip_destroy_distributor(), and ast_sip_initialize_distributor().

cli_commands

struct ast_cli_entry cli_commands[]

static

Definition at line 1173 of file pjsip_distributor.c.

                                             {
    AST_CLI_DEFINE(ast_sip_cli_traverse_objects, "Show PJSIP Unidentified Requests",
        .command = "pjsip show unidentified_requests",
        .usage = "Usage: pjsip show unidentified_requests\n"
                "       Show the PJSIP Unidentified Requests\n"),
};

Referenced by ast_sip_destroy_distributor(), and ast_sip_initialize_distributor().

dialog_associations

struct ao2_container* dialog_associations

static

Definition at line 161 of file pjsip_distributor.c.

Referenced by ast_sip_destroy_distributor(), ast_sip_dialog_get_endpoint(), ast_sip_dialog_set_endpoint(), ast_sip_dialog_set_serializer(), ast_sip_initialize_distributor(), and distributor().

distributor_mod

pjsip_module distributor_mod

static

Definition at line 34 of file pjsip_distributor.c.

                                      {
    .name = {"Request Distributor", 19},
    .priority = PJSIP_MOD_PRIORITY_TSX_LAYER - 6,
    .on_tx_request = record_serializer,
    .on_rx_request = distributor,
    .on_rx_response = distributor,
};

Referenced by ast_sip_destroy_distributor(), ast_sip_initialize_distributor(), distribute(), find_request_serializer(), and record_serializer().

distributor_pool

struct ast_taskprocessor* distributor_pool[DISTRIBUTOR_POOL_SIZE]

static

Pool of serializers to use if not supplied.

Definition at line 63 of file pjsip_distributor.c.

Referenced by ast_sip_get_distributor_serializer(), ast_sip_get_distributor_serializer_dialog(), ast_sip_get_distributor_serializer_hash(), distributor_pool_setup(), and distributor_pool_shutdown().

endpoint_mod

pjsip_module endpoint_mod

static

Initial value:

= {
    .name = {"Endpoint Identifier", 19},
    .priority = PJSIP_MOD_PRIORITY_TSX_LAYER - 3,
    .on_rx_request = endpoint_lookup,
}

Definition at line 510 of file pjsip_distributor.c.

                                   {
    .name = {"Endpoint Identifier", 19},
    .priority = PJSIP_MOD_PRIORITY_TSX_LAYER - 3,
    .on_rx_request = endpoint_lookup,
};

Referenced by apply_acls(), ast_pjsip_rdata_get_endpoint(), ast_sip_destroy_distributor(), ast_sip_initialize_distributor(), distribute(), distributor(), and endpoint_lookup().

global_observer

struct ast_sorcery_observer global_observer

static

Initial value:

= {
    .loaded = global_loaded,
}

Observer which is used to update our interval and default_realm when the global setting changes.

Definition at line 1247 of file pjsip_distributor.c.

                                                     {
    .loaded = global_loaded,
};

Referenced by ast_sip_destroy_distributor(), and ast_sip_initialize_distributor().

overload_trigger

enum ast_sip_taskprocessor_overload_trigger overload_trigger

static

Definition at line 51 of file pjsip_distributor.c.

Referenced by distributor(), and global_loaded().

prune_context

struct ast_sched_context* prune_context

Definition at line 42 of file pjsip_distributor.c.

Referenced by ast_sip_destroy_distributor(), ast_sip_initialize_distributor(), and global_loaded().

unid_formatter

struct ast_sip_cli_formatter_entry* unid_formatter

Definition at line 1180 of file pjsip_distributor.c.

Referenced by ast_sip_destroy_distributor(), and ast_sip_initialize_distributor().

unidentified_count

unsigned int unidentified_count

static

Definition at line 47 of file pjsip_distributor.c.

Referenced by check_endpoint(), global_loaded(), and prune_task().

unidentified_period

unsigned int unidentified_period

static

Definition at line 48 of file pjsip_distributor.c.

Referenced by check_endpoint(), global_loaded(), and prune_task().

unidentified_prune_interval

unsigned int unidentified_prune_interval

static

Definition at line 49 of file pjsip_distributor.c.

Referenced by global_loaded(), and prune_task().

unidentified_requests

struct ao2_container* unidentified_requests

static

Definition at line 46 of file pjsip_distributor.c.

Referenced by ast_sip_destroy_distributor(), ast_sip_initialize_distributor(), authenticate(), cli_unid_get_container(), cli_unid_retrieve_by_id(), endpoint_lookup(), and prune_task().

using_auth_username

int using_auth_username

static

Definition at line 50 of file pjsip_distributor.c.

Referenced by endpoint_lookup(), and global_loaded().