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res_pjsip: Add support for dnsmgr to external_media_address.

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The "external_media_address" option on transports is now
resolved using dnsmgr. This allows it to be automatically
refreshed regularly if refreshes are enabled in dnsmgr.
If the system is using a dynamic IP address a dynamic DNS
hostname can be provided to keep the IP address up to
date.

Change-Id: Ia54771720dff0105bde55d5bbb81a3ba437e05b2
This commit is contained in:
Joshua Colp
2017-07-23 23:34:32 +00:00
committed by George Joseph
parent 58d032112b
commit 2a4283f3e7
7 changed files with 62 additions and 22 deletions
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6
CHANGES
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@@ -26,6 +26,12 @@ app_queue
--- Functionality changes from Asterisk 14.6.0 to Asterisk 14.7.0 ------------
------------------------------------------------------------------------------
res_pjsip
------------------
* The "external_media_address" on transports is now resolved using dnsmgr and
when dnsmgr refreshes are enabled will be automatically updated with the new
IP address of a given hostname.
res_musiconhold
------------------
* By default, when res_musiconhold reloads or unloads, it sends a HUP signal

18
include/asterisk/res_pjsip.h
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@@ -103,15 +103,25 @@ struct ast_sip_transport_state {
*/
struct ast_ha *localnet;
/*!
* DNS manager for refreshing the external address
* DNS manager for refreshing the external signaling address
* \since 13.8.0
*/
struct ast_dnsmgr_entry *external_address_refresher;
struct ast_dnsmgr_entry *external_signaling_address_refresher;
/*!
* Optional external address information
* Optional external signaling address information
* \since 13.8.0
*/
struct ast_sockaddr external_address;
struct ast_sockaddr external_signaling_address;
/*!
* DNS manager for refreshing the external media address
* \since 13.18.0
*/
struct ast_dnsmgr_entry *external_media_address_refresher;
/*!
* Optional external signaling address information
* \since 13.18.0
*/
struct ast_sockaddr external_media_address;
};
/*

42
res/res_pjsip/config_transport.c
View File

@@ -248,8 +248,11 @@ static int destroy_sip_transport_state(void *data)
ast_free(transport_state->id);
ast_free_ha(transport_state->localnet);
if (transport_state->external_address_refresher) {
ast_dnsmgr_release(transport_state->external_address_refresher);
if (transport_state->external_signaling_address_refresher) {
ast_dnsmgr_release(transport_state->external_signaling_address_refresher);
}
if (transport_state->external_media_address_refresher) {
ast_dnsmgr_release(transport_state->external_media_address_refresher);
}
if (transport_state->transport) {
pjsip_transport_shutdown(transport_state->transport);
@@ -399,8 +402,8 @@ static void copy_state_to_transport(struct ast_sip_transport *transport)
memcpy(&transport->tls, &transport->state->tls, sizeof(transport->tls));
memcpy(&transport->ciphers, &transport->state->ciphers, sizeof(transport->ciphers));
transport->localnet = transport->state->localnet;
transport->external_address_refresher = transport->state->external_address_refresher;
memcpy(&transport->external_address, &transport->state->external_address, sizeof(transport->external_address));
transport->external_address_refresher = transport->state->external_signaling_address_refresher;
memcpy(&transport->external_address, &transport->state->external_signaling_address, sizeof(transport->external_signaling_address));
}
static int has_state_changed(struct ast_sip_transport_state *a, struct ast_sip_transport_state *b)
@@ -421,7 +424,11 @@ static int has_state_changed(struct ast_sip_transport_state *a, struct ast_sip_t
return -1;
}
if (ast_sockaddr_cmp(&a->external_address, &b->external_address)) {
if (ast_sockaddr_cmp(&a->external_signaling_address, &b->external_signaling_address)) {
return -1;
}
if (ast_sockaddr_cmp(&a->external_media_address, &b->external_media_address)) {
return -1;
}
@@ -515,24 +522,41 @@ static int transport_apply(const struct ast_sorcery *sorcery, void *obj)
pj_sockaddr_set_port(&temp_state->state->host, (transport->type == AST_TRANSPORT_TLS) ? 5061 : 5060);
}
/* Now that we know what address family we can set up a dnsmgr refresh for the external media address if present */
/* Now that we know what address family we can set up a dnsmgr refresh for the external addresses if present */
if (!ast_strlen_zero(transport->external_signaling_address)) {
if (temp_state->state->host.addr.sa_family == pj_AF_INET()) {
temp_state->state->external_address.ss.ss_family = AF_INET;
temp_state->state->external_signaling_address.ss.ss_family = AF_INET;
} else if (temp_state->state->host.addr.sa_family == pj_AF_INET6()) {
temp_state->state->external_address.ss.ss_family = AF_INET6;
temp_state->state->external_signaling_address.ss.ss_family = AF_INET6;
} else {
ast_log(LOG_ERROR, "Unknown address family for transport '%s', could not get external signaling address\n",
transport_id);
return -1;
}
if (ast_dnsmgr_lookup(transport->external_signaling_address, &temp_state->state->external_address, &temp_state->state->external_address_refresher, NULL) < 0) {
if (ast_dnsmgr_lookup(transport->external_signaling_address, &temp_state->state->external_signaling_address, &temp_state->state->external_signaling_address_refresher, NULL) < 0) {
ast_log(LOG_ERROR, "Could not create dnsmgr for external signaling address on '%s'\n", transport_id);
return -1;
}
}
if (!ast_strlen_zero(transport->external_media_address)) {
if (temp_state->state->host.addr.sa_family == pj_AF_INET()) {
temp_state->state->external_media_address.ss.ss_family = AF_INET;
} else if (temp_state->state->host.addr.sa_family == pj_AF_INET6()) {
temp_state->state->external_media_address.ss.ss_family = AF_INET6;
} else {
ast_log(LOG_ERROR, "Unknown address family for transport '%s', could not get external media address\n",
transport_id);
return -1;
}
if (ast_dnsmgr_lookup(transport->external_media_address, &temp_state->state->external_media_address, &temp_state->state->external_media_address_refresher, NULL) < 0) {
ast_log(LOG_ERROR, "Could not create dnsmgr for external media address on '%s'\n", transport_id);
return -1;
}
}
if (transport->type == AST_TRANSPORT_UDP) {
for (i = 0; i < BIND_TRIES && res != PJ_SUCCESS; i++) {

6
res/res_pjsip_nat.c
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@@ -273,10 +273,10 @@ static pj_status_t nat_on_tx_message(pjsip_tx_data *tdata)
}
}
if (!ast_sockaddr_isnull(&transport_state->external_address)) {
if (!ast_sockaddr_isnull(&transport_state->external_signaling_address)) {
/* Update the contact header with the external address */
if (uri || (uri = nat_get_contact_sip_uri(tdata))) {
pj_strdup2(tdata->pool, &uri->host, ast_sockaddr_stringify_host(&transport_state->external_address));
pj_strdup2(tdata->pool, &uri->host, ast_sockaddr_stringify_host(&transport_state->external_signaling_address));
if (transport->external_signaling_port) {
uri->port = transport->external_signaling_port;
ast_debug(4, "Re-wrote Contact URI port to %d\n", uri->port);
@@ -285,7 +285,7 @@ static pj_status_t nat_on_tx_message(pjsip_tx_data *tdata)
/* Update the via header if relevant */
if ((tdata->msg->type == PJSIP_REQUEST_MSG) && (via || (via = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_VIA, NULL)))) {
pj_strdup2(tdata->pool, &via->sent_by.host, ast_sockaddr_stringify_host(&transport_state->external_address));
pj_strdup2(tdata->pool, &via->sent_by.host, ast_sockaddr_stringify_host(&transport_state->external_signaling_address));
if (transport->external_signaling_port) {
via->sent_by.port = transport->external_signaling_port;
}

4
res/res_pjsip_sdp_rtp.c
View File

@@ -1820,8 +1820,8 @@ static void change_outgoing_sdp_stream_media_address(pjsip_tx_data *tdata, struc
&& ast_apply_ha(transport_state->localnet, &addr) == AST_SENSE_ALLOW) {
return;
}
ast_debug(5, "Setting media address to %s\n", transport->external_media_address);
pj_strdup2(tdata->pool, &stream->conn->addr, transport->external_media_address);
ast_debug(5, "Setting media address to %s\n", ast_sockaddr_stringify_host(&transport_state->external_media_address));
pj_strdup2(tdata->pool, &stream->conn->addr, ast_sockaddr_stringify_host(&transport_state->external_media_address));
}
/*! \brief Function which stops the RTP instance */

4
res/res_pjsip_session.c
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@@ -3896,8 +3896,8 @@ static void session_outgoing_nat_hook(pjsip_tx_data *tdata, struct ast_sip_trans
if (!transport_state->localnet
|| ast_apply_ha(transport_state->localnet, &addr) != AST_SENSE_ALLOW) {
ast_debug(5, "Setting external media address to %s\n", transport->external_media_address);
pj_strdup2(tdata->pool, &sdp->conn->addr, transport->external_media_address);
ast_debug(5, "Setting external media address to %s\n", ast_sockaddr_stringify_host(&transport_state->external_media_address));
pj_strdup2(tdata->pool, &sdp->conn->addr, ast_sockaddr_stringify_host(&transport_state->external_media_address));
}
}

4
res/res_pjsip_t38.c
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@@ -967,8 +967,8 @@ static void change_outgoing_sdp_stream_media_address(pjsip_tx_data *tdata, struc
&& ast_apply_ha(transport_state->localnet, &addr) == AST_SENSE_ALLOW) {
return;
}
ast_debug(5, "Setting media address to %s\n", transport->external_media_address);
pj_strdup2(tdata->pool, &stream->conn->addr, transport->external_media_address);
ast_debug(5, "Setting media address to %s\n", ast_sockaddr_stringify_host(&transport_state->external_media_address));
pj_strdup2(tdata->pool, &stream->conn->addr, ast_sockaddr_stringify_host(&transport_state->external_media_address));
}
/*! \brief Function which destroys the UDPTL instance when session ends */