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res_pjsip_session: Add additional checks for delaying session refreshes.

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There are certain situations which no checks existed for which need to prevent
session refreshes. This includes sending a session refresh with SDP before SDP
negotiation has completed and sending a session refresh before the dialog itself
has been established. Checks for these have been added.

Additionally COLP related UPDATEs were including SDP when it is not needed.

Review: https://reviewboard.asterisk.org/r/4008/
........

Merged revisions 424056 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@424057 65c4cc65-6c06-0410-ace0-fbb531ad65f3
changes/97/197/1
Joshua Colp 11 years ago
parent 5a77eb3476
commit 19ffbb1e64
2 changed files with 35 additions and 8 deletions
Show Stats Download Patch File Download Diff File

6
channels/chan_pjsip.c
Unescape View File

@ -1081,12 +1081,16 @@ static int update_connected_line_information(void *data)
}
} else {
enum ast_sip_session_refresh_method method = session->endpoint->id.refresh_method;
int generate_new_sdp;
struct ast_party_id connected_id;
if (session->inv_session->invite_tsx && (session->inv_session->options & PJSIP_INV_SUPPORT_UPDATE)) {
method = AST_SIP_SESSION_REFRESH_METHOD_UPDATE;
}
/* Only the INVITE method actually needs SDP, UPDATE can do without */
generate_new_sdp = (method == AST_SIP_SESSION_REFRESH_METHOD_INVITE);
/*
* We can get away with a shallow copy here because we are
* not looking at strings.
@ -1099,7 +1103,7 @@ static int update_connected_line_information(void *data)
(session->endpoint->id.trust_outbound ||
((connected_id.name.presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED &&
(connected_id.number.presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED))) {
ast_sip_session_refresh(session, NULL, NULL, NULL, method, 1);
ast_sip_session_refresh(session, NULL, NULL, NULL, method, generate_new_sdp);
}
}

37
res/res_pjsip_session.c
Unescape View File

@ -620,6 +620,8 @@ struct ast_sip_session_delayed_request {
ast_sip_session_sdp_creation_cb on_sdp_creation;
/*! Callback to call when the delayed request receives a response */
ast_sip_session_response_cb on_response;
/*! Whether to generate new SDP */
int generate_new_sdp;
/*! Request to send */
pjsip_tx_data *tdata;
AST_LIST_ENTRY(ast_sip_session_delayed_request) next;
@ -629,6 +631,7 @@ static struct ast_sip_session_delayed_request *delayed_request_alloc(const char
ast_sip_session_request_creation_cb on_request_creation,
ast_sip_session_sdp_creation_cb on_sdp_creation,
ast_sip_session_response_cb on_response,
int generate_new_sdp,
pjsip_tx_data *tdata)
{
struct ast_sip_session_delayed_request *delay = ast_calloc(1, sizeof(*delay));
@ -639,6 +642,7 @@ static struct ast_sip_session_delayed_request *delayed_request_alloc(const char
delay->on_request_creation = on_request_creation;
delay->on_sdp_creation = on_sdp_creation;
delay->on_response = on_response;
delay->generate_new_sdp = generate_new_sdp;
delay->tdata = tdata;
return delay;
}
@ -654,10 +658,10 @@ static int send_delayed_request(struct ast_sip_session *session, struct ast_sip_
if (!strcmp(delay->method, "INVITE")) {
ast_sip_session_refresh(session, delay->on_request_creation,
delay->on_sdp_creation, delay->on_response, AST_SIP_SESSION_REFRESH_METHOD_INVITE, 1);
delay->on_sdp_creation, delay->on_response, AST_SIP_SESSION_REFRESH_METHOD_INVITE, delay->generate_new_sdp);
} else if (!strcmp(delay->method, "UPDATE")) {
ast_sip_session_refresh(session, delay->on_request_creation,
delay->on_sdp_creation, delay->on_response, AST_SIP_SESSION_REFRESH_METHOD_UPDATE, 1);
delay->on_sdp_creation, delay->on_response, AST_SIP_SESSION_REFRESH_METHOD_UPDATE, delay->generate_new_sdp);
} else {
ast_log(LOG_WARNING, "Unexpected delayed %s request with no existing request structure\n", delay->method);
return -1;
@ -694,10 +698,10 @@ static void queue_delayed_request(struct ast_sip_session *session)
static int delay_request(struct ast_sip_session *session, ast_sip_session_request_creation_cb on_request,
ast_sip_session_sdp_creation_cb on_sdp_creation, ast_sip_session_response_cb on_response,
const char *method, pjsip_tx_data *tdata)
int generate_new_sdp, const char *method, pjsip_tx_data *tdata)
{
struct ast_sip_session_delayed_request *delay = delayed_request_alloc(method,
on_request, on_sdp_creation, on_response, tdata);
on_request, on_sdp_creation, on_response, generate_new_sdp, tdata);
if (!delay) {
return -1;
@ -737,12 +741,21 @@ int ast_sip_session_refresh(struct ast_sip_session *session,
return 0;
}
/* If the dialog has not yet been established we have to defer until it has */
if (inv_session->dlg->state != PJSIP_DIALOG_STATE_ESTABLISHED) {
ast_debug(3, "Delaying sending request to %s because dialog has not been established...\n",
ast_sorcery_object_get_id(session->endpoint));
return delay_request(session, on_request_creation, on_sdp_creation, on_response, generate_new_sdp,
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE ? "INVITE" : "UPDATE", NULL);
}
if (method == AST_SIP_SESSION_REFRESH_METHOD_INVITE) {
if (inv_session->invite_tsx) {
/* We can't send a reinvite yet, so delay it */
ast_debug(3, "Delaying sending reinvite to %s because of outstanding transaction...\n",
ast_sorcery_object_get_id(session->endpoint));
return delay_request(session, on_request_creation, on_sdp_creation, on_response, "INVITE", NULL);
return delay_request(session, on_request_creation, on_sdp_creation, on_response,
generate_new_sdp, "INVITE", NULL);
} else if (inv_session->state != PJSIP_INV_STATE_CONFIRMED) {
/* Initial INVITE transaction failed to progress us to a confirmed state
* which means re-invites are not possible
@ -754,6 +767,14 @@ int ast_sip_session_refresh(struct ast_sip_session *session,
}
if (generate_new_sdp) {
/* SDP can only be generated if current negotiation has already completed */
if (pjmedia_sdp_neg_get_state(inv_session->neg) != PJMEDIA_SDP_NEG_STATE_DONE) {
ast_debug(3, "Delaying session refresh with new SDP to %s because SDP negotiation is not yet done...\n",
ast_sorcery_object_get_id(session->endpoint));
return delay_request(session, on_request_creation, on_sdp_creation, on_response, generate_new_sdp,
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE ? "INVITE" : "UPDATE", NULL);
}
new_sdp = generate_session_refresh_sdp(session);
if (!new_sdp) {
ast_log(LOG_ERROR, "Failed to generate session refresh SDP. Not sending session refresh\n");
@ -1732,7 +1753,7 @@ static void resend_reinvite(pj_timer_heap_t *timer, pj_timer_entry *entry)
static void reschedule_reinvite(struct ast_sip_session *session, ast_sip_session_response_cb on_response, pjsip_tx_data *tdata)
{
struct ast_sip_session_delayed_request *delay = delayed_request_alloc("INVITE",
NULL, NULL, on_response, tdata);
NULL, NULL, on_response, 1, tdata);
pjsip_inv_session *inv = session->inv_session;
struct reschedule_reinvite_data *rrd = reschedule_reinvite_data_alloc(session, delay);
pj_time_val tv;
@ -2032,7 +2053,9 @@ static void session_inv_on_tsx_state_changed(pjsip_inv_session *inv, pjsip_trans
/* Terminated INVITE transactions always should result in queuing delayed requests,
* no matter what event caused the transaction to terminate
*/
if (tsx->method.id == PJSIP_INVITE_METHOD && tsx->state == PJSIP_TSX_STATE_TERMINATED) {
if (tsx->method.id == PJSIP_INVITE_METHOD &&
((tsx->state == PJSIP_TSX_STATE_TERMINATED) ||
(tsx->state == PJSIP_TSX_STATE_PROCEEDING))) {
queue_delayed_request(session);
}
}

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