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/*
* Copyright (c) 2003-2007
* Hartmut Brandt
* All rights reserved.
*
* Copyright (c) 2001-2002
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
*
* Author: Harti Brandt <harti@freebsd.org>
*
* Redistribution of this software and documentation and use in source and
* binary forms, with or without modification, are permitted provided that
* the following conditions are met:
*
* 1. Redistributions of source code or documentation must retain the above
* copyright notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY THE AUTHOR
* AND ITS CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: cc_conn.c 1291 2007-07-10 10:35:38Z brandt_h $
*
* ATM API as defined per af-saa-0108
*
* Lower half - connection handling
*/
#include <netnatm/unimsg.h>
#include <netnatm/msg/unistruct.h>
#include <netnatm/msg/unimsglib.h>
#include <netnatm/api/unisap.h>
#include <netnatm/sig/unidef.h>
#include <netnatm/api/atmapi.h>
#include <netnatm/api/ccatm.h>
#include <netnatm/api/ccpriv.h>
static const char *stab[] = {
#define DEF(N) [N] = #N,
CONN_STATES
#undef DEF
};
static const char *ptab[] = {
#define DEF(N) [PARTY_##N] = #N,
PARTY_STATES
#undef DEF
};
const char *
cc_conn_state2str(u_int s)
{
if (s >= sizeof(stab) / sizeof(stab[0]) || stab[s] == NULL)
return ("?");
return (stab[s]);
}
void
cc_conn_set_state(struct ccconn *conn, enum conn_state ns)
{
if (conn->state != ns) {
if (conn->cc->log & CCLOG_CONN_STATE)
cc_conn_log(conn, "%s -> %s",
stab[conn->state], stab[ns]);
conn->state = ns;
}
}
const char *
cc_party_state2str(u_int s)
{
if (s >= sizeof(ptab) / sizeof(ptab[0]) || ptab[s] == NULL)
return ("?");
return (ptab[s]);
}
void
cc_party_set_state(struct ccparty *party, enum party_state ns)
{
if (party->state != ns) {
if (party->conn->cc->log & CCLOG_PARTY_STATE)
cc_party_log(party, "%s -> %s",
ptab[party->state], ptab[ns]);
party->state = ns;
}
}
/*
* Remove connection from its user's queue
*/
void
cc_disconnect_from_user(struct ccconn *conn)
{
if (conn->user == NULL)
cc_conn_log(conn, "no %s", "user");
else {
TAILQ_REMOVE(&conn->user->connq, conn, connq_link);
conn->user->queue_act--;
conn->user = NULL;
}
}
/*
* Put connection on user queue
*/
void
cc_connect_to_user(struct ccconn *conn, struct ccuser *user)
{
if (conn->user != NULL)
cc_conn_log(conn, "still connected to %p", conn->user);
conn->user = user;
TAILQ_INSERT_TAIL(&user->connq, conn, connq_link);
conn->user->queue_act++;
}
/*
* Send a signal to the UNI stack for this connection
*/
static void
cc_send_uni(struct ccconn *conn, u_int op, struct uni_msg *msg)
{
struct ccreq *r;
r = CCZALLOC(sizeof(*r));
if (r == NULL) {
if (msg != NULL)
uni_msg_destroy(msg);
cc_conn_log(conn, "no memory for cookie op=%u", op);
return;
}
if ((r->cookie = ++conn->port->cc->cookie) == 0)
r->cookie = ++conn->port->cc->cookie;
r->req = op;
r->conn = conn;
TAILQ_INSERT_TAIL(&conn->port->cookies, r, link);
conn->port->cc->funcs->send_uni(conn, conn->port->uarg, op,
r->cookie, msg);
}
/*
* Send a RELEASE.request for this connection.
*/
static void
do_release_request(struct ccconn *conn, const struct uni_ie_cause cause[2])
{
struct uni_msg *u;
struct uniapi_release_request *req;
if ((u = uni_msg_alloc(sizeof(*req))) == NULL)
return;
req = uni_msg_wptr(u, struct uniapi_release_request *);
memset(req, 0, sizeof(*req));
u->b_wptr += sizeof(struct uniapi_release_request);
req->release.hdr.cref = conn->cref;
req->release.hdr.act = UNI_MSGACT_DEFAULT;
if (cause == NULL) {
IE_SETPRESENT(req->release.cause[0]);
req->release.cause[0].h.act = UNI_IEACT_DEFAULT;
req->release.cause[0].loc = UNI_CAUSE_LOC_USER;
req->release.cause[0].cause = UNI_CAUSE_UNSPEC;
} else {
req->release.cause[0] = cause[0];
req->release.cause[1] = cause[1];
}
cc_send_uni(conn, UNIAPI_RELEASE_request, u);
}
/*
* Make a RELEASE.response for this connection
*/
static void
do_release_response(struct ccconn *conn, uint8_t cause, struct uni_ie_cause *ie)
{
struct uni_msg *u;
struct uniapi_release_response *resp;
if ((u = uni_msg_alloc(sizeof(*resp))) == NULL)
return;
resp = uni_msg_wptr(u, struct uniapi_release_response *);
memset(resp, 0, sizeof(*resp));
u->b_wptr += sizeof(struct uniapi_release_response);
resp->release_compl.hdr.cref = conn->cref;
resp->release_compl.hdr.act = UNI_MSGACT_DEFAULT;
if (ie != NULL)
resp->release_compl.cause[0] = *ie;
if (cause != 0) {
IE_SETPRESENT(resp->release_compl.cause[0]);
resp->release_compl.cause[0].h.act = UNI_IEACT_DEFAULT;
resp->release_compl.cause[0].loc = UNI_CAUSE_LOC_USER;
resp->release_compl.cause[0].cause = cause;
}
cc_send_uni(conn, UNIAPI_RELEASE_response, u);
}
/**********************************************************************
*
* INSTANCE handling
*/
struct ccconn *
cc_conn_create(struct ccdata *cc)
{
struct ccconn *conn;
conn = CCZALLOC(sizeof(*conn));
if (conn == NULL)
return (NULL);
conn->state = CONN_NULL;
conn->port = NULL;
conn->cc = cc;
LIST_INIT(&conn->parties);
LIST_INSERT_HEAD(&cc->orphaned_conns, conn, port_link);
if (conn->cc->log & CCLOG_CONN_INST)
cc_conn_log(conn, "created %s", "orphaned");
return (conn);
}
/*
* assign to port
*/
void
cc_conn_ins_port(struct ccconn *conn, struct ccport *port)
{
if (conn->port != NULL) {
cc_conn_log(conn, "conn is already on port %u",
conn->port->param.port);
cc_conn_rem_port(conn);
}
LIST_REMOVE(conn, port_link);
conn->port = port;
LIST_INSERT_HEAD(&port->conn_list, conn, port_link);
}
/*
* remove from port
*/
void
cc_conn_rem_port(struct ccconn *conn)
{
if (conn->port == NULL) {
cc_conn_log(conn, "conn not on any %s", "port");
return;
}
LIST_REMOVE(conn, port_link);
conn->port = NULL;
LIST_INSERT_HEAD(&conn->cc->orphaned_conns, conn, port_link);
}
static void
cc_conn_flush_cookies(struct ccconn *conn)
{
struct ccreq *r, *r1;
if (conn->port == NULL)
return;
TAILQ_FOREACH_SAFE(r, &conn->port->cookies, link, r1) {
if (r->conn == conn) {
TAILQ_REMOVE(&conn->port->cookies, r, link);
CCFREE(r);
}
}
}
void
cc_conn_reset_acceptor(struct ccconn *conn)
{
if (conn->acceptor != NULL) {
conn->acceptor->accepted = NULL;
conn->acceptor = NULL;
}
}
/*
* Destroy a connection
*/
void
cc_conn_destroy(struct ccconn *conn)
{
struct ccparty *p;
if (conn->cc->log & CCLOG_CONN_INST)
cc_conn_log(conn, "destroy%s", "");
if (conn->user != NULL) {
cc_conn_log(conn, "still connected to user %p\n", conn->user);
conn->user->queue_act--;
TAILQ_REMOVE(&conn->user->connq, conn, connq_link);
}
if (conn->acceptor != NULL)
conn->acceptor->accepted = NULL;
cc_conn_flush_cookies(conn);
cc_conn_sig_flush(conn);
LIST_REMOVE(conn, port_link);
while ((p = LIST_FIRST(&conn->parties)) != NULL) {
LIST_REMOVE(p, link);
CCFREE(p);
}
CCFREE(conn);
}
struct ccparty *
cc_party_create(struct ccconn *conn, u_int ident, u_int flag)
{
struct ccparty *party;
party = CCZALLOC(sizeof(*party));
if (party == NULL)
return (NULL);
party->conn = conn;
party->state = PARTY_NULL;
IE_SETPRESENT(party->epref);
party->epref.flag = flag;
party->epref.epref = ident;
LIST_INSERT_HEAD(&conn->parties, party, link);
if (party->conn->cc->log & CCLOG_PARTY_INST)
cc_party_log(party, "created %u.%u", flag, ident);
return (party);
}
static void
cc_party_destroy(struct ccparty *party)
{
if (party->conn->cc->log & CCLOG_PARTY_INST)
cc_party_log(party, "destroyed %u.%u", party->epref.flag,
party->epref.epref);
LIST_REMOVE(party, link);
CCFREE(party);
}
static struct ccparty *
cc_party_find(struct ccconn *conn, u_int ident)
{
struct ccparty *party;
LIST_FOREACH(party, &conn->parties, link)
if (party->epref.epref == ident)
return (party);
return (NULL);
}
/*
* Abort connection from down stream (because of the UNI hook beeing
* disconnected). This is called from two places:
* 1) the shutdown code.
* In this case the connections should be already dissociated from
* users and be only in states waiting for the UNI stack.
* 2) from the disconnect code.
*/
void
cc_conn_abort(struct ccconn *conn, int shutdown)
{
struct ccuser *u = conn->user;
struct ccparty *p, *p1;
if (shutdown) {
CCASSERT(u == NULL, ("still in use"));
CCASSERT(conn->acceptor == NULL, ("still in use"));
cc_conn_destroy(conn);
return;
}
/*
* Look whether any parties are blocked waiting for a response
* from the stack. We don't use extra party states to handle
* user aborts, so check that there is a user before using it.
*/
if (u == NULL) {
while ((p = LIST_FIRST(&conn->parties)) != NULL)
cc_party_destroy(p);
} else {
LIST_FOREACH_SAFE(p, &conn->parties, link, p1) {
switch (p->state) {
case PARTY_NULL: /* P0 */
/* should not happen */
goto dpty;
case PARTY_ACTIVE: /* P1 */
/* don't send a drop - user'll get a rel */
goto dpty;
case PARTY_ADD_WAIT_CREATE: /* P2 */
case PARTY_ADD_WAIT_OK: /* P3 */
/* we're adding - synthesise an error */
cc_user_sig(u, USER_SIG_ADD_PARTY_ERR,
NULL, ATMERR_BAD_PORT);
goto dpty;
case PARTY_ADD_WAIT_ACK: /* P4 */
/* don't send a drop - user'll get a rel */
goto dpty;
case PARTY_DROP_WAIT_OK: /* P5 */
case PARTY_DROP_WAIT_ACK: /* P6 */
case PARTY_ADD_DROP_WAIT_OK: /* P11 */
/* we're dropping - synthesis an ok */
cc_user_sig(u, USER_SIG_DROP_PARTY_OK,
NULL, p->epref.epref);
goto dpty;
case PARTY_WAIT_DESTROY: /* P7 */
goto dpty;
case PARTY_WAIT_SETUP_COMPL: /* P8 */
case PARTY_WAIT_SETUP_CONF: /* P10 */
/* first party - nothing to do */
goto dpty;
case PARTY_WAIT_DROP_ACK_OK: /* P9 */
case PARTY_ADD_DROPACK_WAIT_OK:/* P12 */
/* we're dropping - nothing to do */
goto dpty;
}
cc_party_log(p, "bad uabort for party in state %s",
ptab[p->state]);
dpty:
cc_party_destroy(p);
}
}
/*
* Now do what the connection needs
*/
switch (conn->state) {
case CONN_NULL: /* 0 */
case CONN_OUT_PREPARING: /* 1 */
/* may not happen because we're not associated with
* aport yet */
break;
case CONN_OUT_WAIT_CREATE: /* 2 */
case CONN_OUT_WAIT_OK: /* 3 */
case CONN_OUT_WAIT_DESTROY: /* 37 */
/* return an error to the user, go back to C1/U1
* reset cref (for C37, C3) and cookie */
conn->cref.flag = 0;
conn->cref.cref = 0;
cc_conn_flush_cookies(conn);
cc_conn_set_state(conn, CONN_OUT_PREPARING);
cc_conn_rem_port(conn);
cc_user_sig(u, USER_SIG_CONNECT_OUTGOING_ERR,
NULL, ATMERR_BAD_PORT);
return;
case CONN_OUT_WAIT_CONF: /* 4 */
case CONN_ACTIVE: /* 5 */
case CONN_IN_WAIT_COMPL: /* 13 */
/* emulate a RELEASE.confirm */
memset(&u->cause, 0, sizeof(u->cause));
cc_user_sig(u, USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
cc_conn_destroy(conn);
return;
case CONN_IN_PREPARING: /* 10 */
case CONN_AB_WAIT_REQ_OK: /* 33 */
case CONN_AB_WAIT_RESP_OK: /* 34 */
case CONN_AB_FLUSH_IND: /* 35 */
/* no user - destroy */
cc_conn_destroy(conn);
return;
case CONN_IN_ARRIVED: /* 11 */
u->aborted = 1;
cc_disconnect_from_user(conn);
cc_conn_destroy(conn);
return;
case CONN_IN_WAIT_ACCEPT_OK: /* 12 */
/* return ACCEPT error */
cc_disconnect_from_user(conn);
cc_conn_reset_acceptor(conn);
cc_user_sig(u, USER_SIG_ACCEPT_ERR,
u, ATMERR_PREVIOUSLY_ABORTED);
cc_conn_destroy(conn);
return;
case CONN_REJ_WAIT_OK: /* 14 */
/* return REJECT ok */
cc_disconnect_from_user(conn);
cc_conn_destroy(conn);
cc_user_sig(u, USER_SIG_REJECT_OK, NULL, 0);
return;
case CONN_REL_IN_WAIT_OK: /* 15 */
case CONN_REL_WAIT_OK: /* 20 */
/* confirm destroy */
if (u != NULL) {
/* connection not aborted */
memset(&u->cause, 0, sizeof(u->cause));
cc_user_sig(u, USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
}
cc_conn_destroy(conn);
return;
case CONN_IN_WAITING: /* 21 */
/* user has not seen the connection - destroy */
cc_disconnect_from_user(conn);
cc_conn_destroy(conn);
return;
}
cc_conn_log(conn, "bad state %s", stab[conn->state]);
}
#ifdef DEBUG_MATCH
static void
print_sap(const struct uni_sap *sap)
{
static const char *const tags[] = {
[UNISVE_ABSENT] "absent",
[UNISVE_PRESENT]"present",
[UNISVE_ANY] "any",
};
u_int i;
printf("addr={%s", tags[sap->addr.tag]);
if (sap->addr.tag == UNISVE_PRESENT) {
printf(",%d-%d", sap->addr.type, sap->addr.plan);
for (i = 0; i < sap->addr.len; i++)
printf("%c%02x", ",:"[i!=0], sap->addr.addr[i]);
}
printf("}\n");
printf("selector={%s", tags[sap->selector.tag]);
if (sap->selector.tag == UNISVE_PRESENT)
printf(",%02x", sap->selector.selector);
printf("}\n");
printf("blli_id2={%s", tags[sap->blli_id2.tag]);
if (sap->blli_id2.tag == UNISVE_PRESENT)
printf(",%02x,%02x", sap->blli_id2.proto, sap->blli_id2.user);
printf("}\n");
printf("blli_id3={%s", tags[sap->blli_id3.tag]);
if (sap->blli_id3.tag == UNISVE_PRESENT)
printf(",%02x,%02x,%02x,%06x,%04x,%d",
sap->blli_id3.proto, sap->blli_id3.user,
sap->blli_id3.ipi, sap->blli_id3.oui,
sap->blli_id3.pid, sap->blli_id3.noipi);
printf("}\n");
printf("bhli={%s", tags[sap->bhli.tag]);
if (sap->bhli.tag == UNISVE_PRESENT) {
printf(",%d", sap->bhli.type);
for (i = 0; i < sap->bhli.len; i++)
printf("%c%02x", ",:"[i!=0], sap->bhli.info[i]);
}
printf("}\n");
}
#endif
/*********************************************************************
*
* DISPATCH incoming call
*/
void
cc_conn_dispatch(struct ccconn *conn)
{
struct ccdata *priv = conn->port->cc;
struct ccuser *user;
u_int blli_index;
#ifdef DEBUG_MATCH
static char buf[1000];
static struct unicx cx;
static int init = 1;
if (init) {
uni_initcx(&cx);
init = 0;
}
#endif
/*
* Do call dispatching according to 4.6
*/
#ifdef DEBUG_MATCH
printf("+++++ DISPATCH++++++\n");
#endif
for (blli_index = 0; blli_index < UNI_NUM_IE_BLLI; blli_index++) {
if (blli_index > 0 && !IE_ISGOOD(conn->blli[blli_index]))
break;
#ifdef DEBUG_MATCH
if (IE_ISPRESENT(conn->called)) {
uni_print_ie(buf, sizeof(buf), UNI_IE_CALLED,
(union uni_ieall *)&conn->called, &cx);
printf("called=%s\n", buf);
}
if (IE_ISPRESENT(conn->bhli)) {
uni_print_ie(buf, sizeof(buf), UNI_IE_BHLI,
(union uni_ieall *)&conn->bhli, &cx);
printf("bhli=%s\n", buf);
}
if (IE_ISPRESENT(conn->blli[blli_index])) {
uni_print_ie(buf, sizeof(buf), UNI_IE_BLLI,
(union uni_ieall *)&conn->blli[blli_index], &cx);
printf("%s\n", buf);
}
#endif
LIST_FOREACH(user, &priv->user_list, node_link) {
if ((user->state == USER_IN_WAITING ||
user->state == USER_IN_ARRIVED ||
user->state == USER_IN_WAIT_ACC ||
user->state == USER_IN_WAIT_REJ) &&
!unisve_is_catchall(user->sap)) {
#ifdef DEBUG_MATCH
printf("TRYING user=%p\n", user);
print_sap(user->sap);
#endif
if (unisve_match(user->sap, &conn->called,
&conn->blli[blli_index], &conn->bhli))
goto found;
}
}
}
#ifdef DEBUG_MATCH
printf("TRYING CATCHALL\n");
#endif
blli_index = 0;
LIST_FOREACH(user, &priv->user_list, node_link) {
if ((user->state == USER_IN_WAITING ||
user->state == USER_IN_ARRIVED ||
user->state == USER_IN_WAIT_ACC ||
user->state == USER_IN_WAIT_REJ) &&
unisve_is_catchall(user->sap))
goto found;
}
#ifdef DEBUG_MATCH
printf("SORRY\n");
#endif
/*
* No application found - reject call.
*/
do_release_response(conn, UNI_CAUSE_INCOMP, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
return;
found:
#ifdef DEBUG_MATCH
printf("MATCH\n");
#endif
if (user->queue_max == user->queue_act) {
do_release_response(conn, UNI_CAUSE_BUSY, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
return;
}
if (blli_index == 0 && !IE_ISGOOD(conn->blli[blli_index]))
conn->blli_selector = 0;
else
conn->blli_selector = blli_index + 1;
cc_conn_set_state(conn, CONN_IN_WAITING);
cc_connect_to_user(conn, user);
cc_user_sig(user, USER_SIG_SETUP_IND, NULL, 0);
}
static void
cc_party_setup_conf(struct ccconn *conn)
{
struct ccparty *party;
party = cc_party_find(conn, conn->epref.epref);
if (party == NULL) {
cc_party_log(party, "no party for %s",
cc_conn_sigtab[CONN_SIG_SETUP_CONFIRM]);
return;
}
if (party->state != PARTY_WAIT_SETUP_CONF) {
cc_party_log(party, "bad state=%s for signal=%s",
ptab[party->state], cc_conn_sigtab[CONN_SIG_SETUP_CONFIRM]);
return;
}
cc_party_set_state(party, PARTY_ACTIVE);
}
static void
cc_party_add_ack_ind(struct ccconn *conn, const struct uni_ie_epref *epref)
{
struct ccparty *party;
party = cc_party_find(conn, epref->epref);
if (party == NULL) {
cc_party_log(party, "no party for %s",
cc_conn_sigtab[CONN_SIG_PARTY_ADD_ACK_IND]);
}
if (party->state != PARTY_ADD_WAIT_ACK) {
cc_party_log(party, "bad state=%s for signal=%s",
ptab[party->state],
cc_conn_sigtab[CONN_SIG_PARTY_ADD_ACK_IND]);
return;
}
cc_party_set_state(party, PARTY_ACTIVE);
cc_user_sig(conn->user, USER_SIG_ADD_PARTY_ACK,
NULL, epref->epref);
}
static void
cc_party_add_rej_ind(struct ccconn *conn, const struct uni_ie_epref *epref)
{
struct ccparty *party;
party = cc_party_find(conn, epref->epref);
if (party == NULL) {
cc_party_log(party, "no party for %s",
cc_conn_sigtab[CONN_SIG_PARTY_ADD_REJ_IND]);
return;
}
if (party->state != PARTY_ADD_WAIT_ACK) {
cc_party_log(party, "bad state=%s for signal=%s",
ptab[party->state],
cc_conn_sigtab[CONN_SIG_PARTY_ADD_REJ_IND]);
return;
}
cc_party_set_state(party, PARTY_WAIT_DESTROY);
cc_user_sig(conn->user, USER_SIG_ADD_PARTY_REJ, NULL, epref->epref);
}
static void
cc_party_drop_ack_ind(struct ccconn *conn,
const struct uni_drop_party *drop)
{
struct ccparty *party;
party = cc_party_find(conn, drop->epref.epref);
if (party == NULL) {
cc_party_log(party, "no party for %s",
cc_conn_sigtab[CONN_SIG_DROP_PARTY_ACK_IND]);
return;
}
switch (party->state) {
case PARTY_ACTIVE: /* P1 */
memset(&conn->user->cause[1], 0, sizeof(conn->user->cause[1]));
conn->user->cause[0] = drop->cause;
cc_party_set_state(party, PARTY_WAIT_DESTROY);
cc_user_sig(conn->user, USER_SIG_DROP_PARTY_IND,
NULL, party->epref.epref);
break;
case PARTY_ADD_WAIT_ACK: /* P4 */
memset(&conn->user->cause[1], 0, sizeof(conn->user->cause[1]));
conn->user->cause[0] = drop->cause;
cc_party_set_state(party, PARTY_WAIT_DESTROY);
cc_user_sig(conn->user, USER_SIG_ADD_PARTY_REJ,
NULL, party->epref.epref);
break;
case PARTY_DROP_WAIT_ACK: /* P6 */
cc_party_set_state(party, PARTY_WAIT_DESTROY);
cc_user_sig(conn->user, USER_SIG_DROP_PARTY_OK, NULL, 0);
break;
case PARTY_WAIT_SETUP_COMPL: /* P8 */
case PARTY_WAIT_SETUP_CONF: /* P10 */
cc_party_set_state(party, PARTY_WAIT_DESTROY);
break;
default:
cc_party_log(party, "bad state=%s for signal=%s",
ptab[party->state],
cc_conn_sigtab[CONN_SIG_DROP_PARTY_ACK_IND]);
break;
}
}
/*
* Handle a signal to this connection
*/
void
cc_conn_sig_handle(struct ccconn *conn, enum conn_sig sig,
void *arg, u_int iarg)
{
struct ccparty *party;
if (conn->cc->log & CCLOG_CONN_SIG)
cc_conn_log(conn, "signal %s in state %s", cc_conn_sigtab[sig],
stab[conn->state]);
switch (sig) {
case CONN_SIG_CONNECT_OUTGOING:
/* Do SETUP */
{
struct uni_msg *u;
struct uniapi_setup_request *setup;
if (conn->state != CONN_OUT_PREPARING)
goto bad_state;
if (IE_ISGOOD(conn->bearer) &&
conn->bearer.cfg == UNI_BEARER_MP) {
IE_SETPRESENT(conn->epref);
conn->epref.flag = 0;
conn->epref.epref = 0;
}
/*
* Construct message to UNI.
*/
u = uni_msg_alloc(sizeof(struct uniapi_setup_request));
if (u == NULL) {
cc_user_sig(conn->user, USER_SIG_CONNECT_OUTGOING_ERR,
NULL, ATMERR_NOMEM);
return;
}
setup = uni_msg_wptr(u, struct uniapi_setup_request *);
memset(setup, 0, sizeof(*setup));
u->b_wptr += sizeof(struct uniapi_setup_request);
setup->setup.hdr.act = UNI_MSGACT_DEFAULT;
memcpy(setup->setup.blli, conn->blli, sizeof(conn->blli));
setup->setup.bearer = conn->bearer;
setup->setup.traffic = conn->traffic;
setup->setup.qos = conn->qos;
setup->setup.exqos = conn->exqos;
setup->setup.called = conn->called;
setup->setup.calledsub[0] = conn->calledsub;
setup->setup.aal = conn->aal;
setup->setup.epref = conn->epref;
setup->setup.eetd = conn->eetd;
setup->setup.abrsetup = conn->abrsetup;
setup->setup.abradd = conn->abradd;
setup->setup.calling = conn->calling;
setup->setup.callingsub[0] = conn->callingsub;
setup->setup.connid = conn->connid;
memcpy(setup->setup.tns, conn->tns, sizeof(conn->tns));
setup->setup.atraffic = conn->atraffic;
setup->setup.mintraffic = conn->mintraffic;
setup->setup.cscope = conn->cscope;
setup->setup.bhli = conn->bhli;
setup->setup.mdcr = conn->mdcr;
cc_conn_set_state(conn, CONN_OUT_WAIT_CREATE);
cc_send_uni(conn, UNIAPI_SETUP_request, u);
break;
}
case CONN_SIG_ARRIVAL:
/* user informed of arrival of this call */
if (conn->state != CONN_IN_WAITING)
goto bad_state;
cc_conn_set_state(conn, CONN_IN_ARRIVED);
break;
case CONN_SIG_RELEASE:
{
/* Release this call */
struct uni_msg *u;
struct uniapi_release_request *req;
if (conn->state != CONN_ACTIVE &&
conn->state != CONN_IN_WAIT_COMPL)
goto bad_state;
if ((u = uni_msg_alloc(sizeof(*req))) == NULL)
return;
req = uni_msg_wptr(u, struct uniapi_release_request *);
memset(req, 0, sizeof(*req));
u->b_wptr += sizeof(struct uniapi_release_request);
req->release.hdr.cref = conn->cref;
req->release.hdr.act = UNI_MSGACT_DEFAULT;
req->release.cause[0] = conn->cause[0];
req->release.cause[1] = conn->cause[1];
if (conn->state == CONN_ACTIVE)
cc_conn_set_state(conn, CONN_REL_WAIT_OK);
else
cc_conn_set_state(conn, CONN_REL_IN_WAIT_OK);
cc_send_uni(conn, UNIAPI_RELEASE_request, u);
break;
}
case CONN_SIG_REJECT:
{
/* reject from user */
struct ccuser *user = conn->user;
if (conn->state != CONN_IN_ARRIVED) {
cc_user_sig(user, USER_SIG_REJECT_ERR,
NULL, ATMERR_BAD_STATE);
break;
}
cc_conn_set_state(conn, CONN_REJ_WAIT_OK);
do_release_response(conn, 0, conn->cause);
break;
}
case CONN_SIG_ACCEPT:
{
/* User accepts. */
struct ccuser *newep = arg;
struct uni_msg *u;
struct uniapi_setup_response *resp;
struct ccuser *user = conn->user;
if (conn->state != CONN_IN_ARRIVED) {
cc_user_sig(user, USER_SIG_ACCEPT_ERR,
NULL, ATMERR_PREVIOUSLY_ABORTED);
break;
}
u = uni_msg_alloc(sizeof(struct uniapi_setup_response));
if (u == NULL) {
cc_user_sig(user, USER_SIG_ACCEPT_ERR,
NULL, ATMERR_NOMEM);
return;
}
/*
* Link to the new endpoint
*/
conn->acceptor = newep;
newep->accepted = conn;
/*
* Construct connect message
*/
resp = uni_msg_wptr(u, struct uniapi_setup_response *);
memset(resp, 0, sizeof(*resp));
u->b_wptr += sizeof(*resp);
resp->connect.hdr.act = UNI_MSGACT_DEFAULT;
resp->connect.hdr.cref = conn->cref;
/*
* attributes
*/
if (conn->dirty_attr & CCDIRTY_AAL)
resp->connect.aal = conn->aal;
if (conn->dirty_attr & CCDIRTY_BLLI)
resp->connect.blli =
conn->blli[conn->blli_selector - 1];
if (conn->dirty_attr & CCDIRTY_CONNID)
resp->connect.connid = conn->connid;
/* XXX NOTIFY */
if (conn->dirty_attr & CCDIRTY_EETD)
resp->connect.eetd = conn->eetd;
/* XXX GIT */
/* XXX UU */
if (conn->dirty_attr & CCDIRTY_TRAFFIC)
resp->connect.traffic = conn->traffic;
if (conn->dirty_attr & CCDIRTY_EXQOS)
resp->connect.exqos = conn->exqos;
if (conn->dirty_attr & CCDIRTY_ABRSETUP)
resp->connect.abrsetup = conn->abrsetup;
if (conn->dirty_attr & CCDIRTY_ABRADD)
resp->connect.abradd = conn->abradd;
/*
* If the SETUP had an endpoint reference - echo it back
*/
if (IE_ISPRESENT(conn->epref)) {
resp->connect.epref = conn->epref;
resp->connect.epref.flag = !resp->connect.epref.flag;
}
cc_conn_set_state(conn, CONN_IN_WAIT_ACCEPT_OK);
cc_send_uni(conn, UNIAPI_SETUP_response, u);
break;
}
case CONN_SIG_ADD_PARTY:
{
/* request to add party from user */
struct uni_msg *u;
struct uniapi_add_party_request *req;
if (conn->state != CONN_ACTIVE)
goto bad_state;
/* create the party */
party = cc_party_create(conn, (u_int)(uintptr_t)arg, 0);
if (party == NULL) {
cc_user_sig(conn->user, USER_SIG_ADD_PARTY_ERR,
NULL, ATMERR_NOMEM);
return;
}
party->called = conn->called;
/* Construct message to UNI. */
u = uni_msg_alloc(sizeof(struct uniapi_setup_request));
if (u == NULL) {
cc_party_destroy(party);
cc_user_sig(conn->user, USER_SIG_ADD_PARTY_ERR,
NULL, ATMERR_NOMEM);
return;
}
req = uni_msg_wptr(u, struct uniapi_add_party_request *);
memset(req, 0, sizeof(*req));
u->b_wptr += sizeof(struct uniapi_add_party_request);
req->add.hdr.act = UNI_MSGACT_DEFAULT;
req->add.hdr.cref = conn->cref;
req->add.epref = party->epref;
req->add.called = party->called;
cc_party_set_state(party, PARTY_ADD_WAIT_CREATE);
cc_send_uni(conn, UNIAPI_ADD_PARTY_request, u);
break;
}
case CONN_SIG_DROP_PARTY:
{
/* user request to drop a party */
struct uni_msg *u;
struct uniapi_drop_party_request *req;
if (conn->state != CONN_ACTIVE)
goto bad_state;
party = cc_party_find(conn, (u_int)(uintptr_t)arg);
if (party == NULL) {
cc_user_sig(conn->user, USER_SIG_DROP_PARTY_ERR,
NULL, ATMERR_BAD_PARTY);
return;
}
switch (party->state) {
case PARTY_ACTIVE:
case PARTY_ADD_WAIT_ACK:
break;
default:
cc_user_sig(conn->user, USER_SIG_DROP_PARTY_ERR,
NULL, ATMERR_BAD_STATE);
return;
}
/*
* Construct message to UNI.
*/
u = uni_msg_alloc(sizeof(*req));
if (u == NULL) {
cc_user_sig(conn->user, USER_SIG_DROP_PARTY_ERR,
NULL, ATMERR_NOMEM);
return;
}
req = uni_msg_wptr(u, struct uniapi_drop_party_request *);
memset(req, 0, sizeof(*req));
u->b_wptr += sizeof(struct uniapi_drop_party_request);
req->drop.hdr.act = UNI_MSGACT_DEFAULT;
req->drop.hdr.cref = conn->cref;
req->drop.epref = party->epref;
req->drop.cause = conn->cause[0];
if (party->state == PARTY_ACTIVE)
cc_party_set_state(party, PARTY_DROP_WAIT_OK);
else
cc_party_set_state(party, PARTY_ADD_DROP_WAIT_OK);
cc_send_uni(conn, UNIAPI_DROP_PARTY_request, u);
break;
}
case CONN_SIG_DROP_PARTY_ACK_IND:
{
struct uni_msg *msg = arg;
struct uniapi_drop_party_ack_indication *ind = uni_msg_rptr(msg,
struct uniapi_drop_party_ack_indication *);
cc_party_drop_ack_ind(conn, &ind->drop);
break;
}
case CONN_SIG_USER_ABORT:
/*
* Aborting a connection. This is callable in all states.
* The connection is already disconnected from the user.
* The cause is in cause[].
*/
switch (conn->state) {
case CONN_NULL: /* C0 */
case CONN_OUT_PREPARING: /* C1 */
cc_conn_destroy(conn);
break;
case CONN_OUT_WAIT_CONF: /* C4 */
case CONN_ACTIVE: /* C5 */
do_release_request(conn, conn->cause);
cc_conn_set_state(conn, CONN_AB_WAIT_REQ_OK);
break;
case CONN_IN_WAITING: /* C21 */
/* that should not happen */
goto bad_state;
break;
case CONN_IN_ARRIVED: /* C11 */
/*
* This is called only for the first connection
* of the user - the others are re-dispatched.
*/
do_release_response(conn, 0, conn->cause);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
break;
case CONN_IN_WAIT_COMPL: /* C13 */
do_release_request(conn, conn->cause);
cc_conn_set_state(conn, CONN_AB_WAIT_REQ_OK);
break;
case CONN_OUT_WAIT_DESTROY: /* C20 */
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
break;
case CONN_IN_WAIT_ACCEPT_OK: /* C12 */
case CONN_AB_WAIT_REQ_OK: /* C33 */
case CONN_AB_WAIT_RESP_OK: /* C34 */
case CONN_AB_FLUSH_IND: /* C35 */
/* just ignore */
break;
/*
* The following states may not happen, because
* we're waiting for a response from the UNI stack.
* As soon as the response comes the ABORT is undefered
* and will hit us (but in another state).
*/
case CONN_OUT_WAIT_CREATE: /* C2 */
case CONN_OUT_WAIT_OK: /* C3 */
case CONN_IN_PREPARING: /* C10 */
case CONN_REJ_WAIT_OK: /* C14 */
case CONN_REL_IN_WAIT_OK: /* C15 */
case CONN_REL_WAIT_OK: /* C20 */
goto bad_state;
}
break;
case CONN_SIG_CREATED:
{
/*
* CALL_CREATED message from UNI. This can happen for either
* incoming or outgoing connections.
*/
struct uni_msg *msg = arg;
struct uniapi_call_created *cr = uni_msg_rptr(msg,
struct uniapi_call_created *);
switch (conn->state) {
case CONN_OUT_WAIT_CREATE:
conn->cref = cr->cref;
cc_conn_set_state(conn, CONN_OUT_WAIT_OK);
break;
case CONN_NULL:
conn->cref = cr->cref;
cc_conn_set_state(conn, CONN_IN_PREPARING);
break;
default:
goto bad_state;
}
break;
}
case CONN_SIG_DESTROYED:
/*
* CALL_DESTROYED message from UNI.
*/
switch (conn->state) {
case CONN_OUT_WAIT_DESTROY:
cc_conn_rem_port(conn);
cc_conn_set_state(conn, CONN_OUT_PREPARING);
if (conn->user != NULL)
cc_user_sig(conn->user,
USER_SIG_CONNECT_OUTGOING_ERR,
NULL, ATM_MKUNIERR(conn->reason));
break;
case CONN_AB_FLUSH_IND:
cc_conn_destroy(conn);
break;
case CONN_IN_PREPARING:
cc_conn_destroy(conn);
break;
default:
goto bad_state;
}
break;
case CONN_SIG_SETUP_CONFIRM:
/* Setup confirm from the UNI. */
{
struct uni_msg *msg = arg;
struct uniapi_setup_confirm *conf = uni_msg_rptr(msg,
struct uniapi_setup_confirm *);
switch (conn->state) {
case CONN_OUT_WAIT_CONF:
/*
* Shuffle attributes and inform the user.
* Negotiable attributes are condititionally shuffled,
* because not returning it means accepting it
* (in case of blli the first instance of it).
* All others are shuffled unconditionally.
* Here we should also open the VCI in the driver. (XXX)
*/
#define SHUFFLE(ATTR) conn->ATTR = conf->connect.ATTR
#define COND_SHUFFLE(ATTR) if (IE_ISPRESENT(conf->connect.ATTR)) SHUFFLE(ATTR)
COND_SHUFFLE(aal);
(void)memset(conn->blli + 1, 0,
sizeof(conn->blli) - sizeof(conn->blli[0]));
if (IE_ISPRESENT(conf->connect.blli))
conn->blli[0] = conf->connect.blli;
conn->blli_selector = 1;
COND_SHUFFLE(epref);
SHUFFLE(conned);
SHUFFLE(connedsub);
SHUFFLE(eetd);
COND_SHUFFLE(traffic);
COND_SHUFFLE(exqos);
COND_SHUFFLE(abrsetup);
COND_SHUFFLE(abradd);
COND_SHUFFLE(connid);
#undef SHUFFLE
#undef COND_SHUFFLE
if (IE_ISGOOD(conn->epref))
cc_party_setup_conf(conn);
cc_conn_set_state(conn, CONN_ACTIVE);
cc_user_sig(conn->user, USER_SIG_SETUP_CONFIRM,
NULL, 0);
break;
case CONN_AB_FLUSH_IND:
case CONN_AB_WAIT_RESP_OK:
break;
default:
goto bad_state;
}
break;
}
case CONN_SIG_SETUP_IND:
{
/* SETUP indication */
struct uni_msg *msg = arg;
struct uniapi_setup_indication *ind = uni_msg_rptr(msg,
struct uniapi_setup_indication *);
u_int i;
if (conn->state != CONN_IN_PREPARING)
goto bad_state;
/*
* Shuffle information elements.
*/
for (i = 0; i < UNI_NUM_IE_BLLI; i++)
conn->blli[i] = ind->setup.blli[i];
conn->bearer = ind->setup.bearer;
conn->traffic = ind->setup.traffic;
conn->qos = ind->setup.qos;
conn->exqos = ind->setup.exqos;
conn->called = ind->setup.called;
conn->calledsub = ind->setup.calledsub[0];
conn->aal = ind->setup.aal;
conn->epref = ind->setup.epref;
conn->eetd = ind->setup.eetd;
conn->abrsetup = ind->setup.abrsetup;
conn->abradd = ind->setup.abradd;
conn->calling = ind->setup.calling;
conn->callingsub = ind->setup.callingsub[0];
conn->connid = ind->setup.connid;
for (i = 0; i < UNI_NUM_IE_TNS; i++)
conn->tns[i] = ind->setup.tns[i];
conn->atraffic = ind->setup.atraffic;
conn->mintraffic = ind->setup.mintraffic;
conn->cscope = ind->setup.cscope;
conn->bhli = ind->setup.bhli;
conn->mdcr = ind->setup.mdcr;
cc_conn_dispatch(conn);
break;
}
case CONN_SIG_SETUP_COMPL:
{
struct uni_msg *msg = arg;
struct uniapi_setup_indication *ind __unused =
uni_msg_rptr(msg, struct uniapi_setup_indication *);
/* SETUP_COMPLETE.indication from UNI */
if (conn->state == CONN_AB_FLUSH_IND ||
conn->state == CONN_AB_WAIT_RESP_OK)
break;
if (conn->state != CONN_IN_WAIT_COMPL)
goto bad_state;
cc_conn_set_state(conn, CONN_ACTIVE);
LIST_FOREACH(party, &conn->parties, link) {
if (party->state == PARTY_WAIT_SETUP_COMPL)
cc_party_set_state(party, PARTY_ACTIVE);
else
cc_party_log(party, "bad state=%s for sig=%s",
ptab[party->state],
cc_conn_sigtab[CONN_SIG_SETUP_COMPL]);
}
cc_user_sig(conn->user, USER_SIG_SETUP_COMPL, NULL, 0);
break;
}
case CONN_SIG_PROC_IND:
{
/*
* ALERTING.indication and PROCEEDING.indication are entirly
* ignored by the specification. We need to at least save the
* connid information element.
*/
struct uni_msg *msg = arg;
struct uniapi_proceeding_indication *ind = uni_msg_rptr(msg,
struct uniapi_proceeding_indication *);
switch (conn->state) {
case CONN_OUT_WAIT_CONF:
if (IE_ISGOOD(ind->call_proc.connid))
conn->connid = ind->call_proc.connid;
break;
case CONN_AB_FLUSH_IND:
case CONN_AB_WAIT_RESP_OK:
break;
default:
goto bad_state;
}
break;
}
case CONN_SIG_ALERTING_IND:
{
struct uni_msg *msg = arg;
struct uniapi_alerting_indication *ind = uni_msg_rptr(msg,
struct uniapi_alerting_indication *);
switch (conn->state) {
case CONN_OUT_WAIT_CONF:
if (IE_ISGOOD(ind->alerting.connid))
conn->connid = ind->alerting.connid;
break;
case CONN_AB_FLUSH_IND:
case CONN_AB_WAIT_RESP_OK:
break;
default:
goto bad_state;
}
break;
}
case CONN_SIG_REL_CONF:
{
/* RELEASE.confirm from UNI */
struct uni_msg *msg = arg;
struct uniapi_release_confirm *conf = uni_msg_rptr(msg,
struct uniapi_release_confirm *);
switch (conn->state) {
case CONN_OUT_WAIT_CONF:
case CONN_ACTIVE:
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
memcpy(conn->user->cause, conf->release.cause,
sizeof(conn->user->cause));
/*
* If any party is in P6, ok the user
*/
LIST_FOREACH(party, &conn->parties, link) {
if (party->state == PARTY_DROP_WAIT_ACK) {
cc_party_set_state(party,
PARTY_WAIT_DESTROY);
cc_user_sig(conn->user,
USER_SIG_DROP_PARTY_OK,
NULL, party->epref.epref);
}
}
cc_user_sig(conn->user, USER_SIG_RELEASE_CONFIRM,
NULL, 0);
cc_disconnect_from_user(conn);
break;
case CONN_AB_FLUSH_IND:
case CONN_AB_WAIT_RESP_OK:
break;
case CONN_IN_WAITING:
cc_disconnect_from_user(conn);
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
break;
case CONN_IN_ARRIVED:
conn->user->aborted = 1;
memcpy(conn->user->cause, conf->release.cause,
sizeof(conn->user->cause));
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
cc_disconnect_from_user(conn);
break;
case CONN_IN_WAIT_COMPL:
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
memcpy(conn->user->cause, conf->release.cause,
sizeof(conn->user->cause));
cc_user_sig(conn->user, USER_SIG_RELEASE_CONFIRM,
NULL, 0);
cc_disconnect_from_user(conn);
break;
default:
goto bad_state;
}
break;
}
case CONN_SIG_REL_IND:
{
/* RELEASE.ind from UNI */
struct uni_msg *msg = arg;
struct uniapi_release_indication *conf = uni_msg_rptr(msg,
struct uniapi_release_indication *);
switch (conn->state) {
case CONN_OUT_WAIT_CONF:
case CONN_ACTIVE:
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
memcpy(conn->user->cause, conf->release.cause,
sizeof(conn->user->cause));
/*
* If any party is in P6, ok the user
*/
LIST_FOREACH(party, &conn->parties, link) {
if (party->state == PARTY_DROP_WAIT_ACK) {
cc_party_set_state(party,
PARTY_WAIT_DESTROY);
cc_user_sig(conn->user,
USER_SIG_DROP_PARTY_OK,
NULL, party->epref.epref);
}
}
cc_user_sig(conn->user, USER_SIG_RELEASE_CONFIRM,
NULL, 0);
cc_disconnect_from_user(conn);
break;
case CONN_AB_FLUSH_IND:
case CONN_AB_WAIT_RESP_OK:
break;
case CONN_IN_WAITING:
cc_disconnect_from_user(conn);
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
break;
case CONN_IN_ARRIVED:
conn->user->aborted = 1;
cc_disconnect_from_user(conn);
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
break;
case CONN_IN_WAIT_COMPL:
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
memcpy(conn->user->cause, conf->release.cause,
sizeof(conn->user->cause));
cc_user_sig(conn->user, USER_SIG_RELEASE_CONFIRM,
NULL, 0);
cc_disconnect_from_user(conn);
break;
default:
goto bad_state;
break;
}
break;
}
case CONN_SIG_PARTY_ALERTING_IND:
/* party alerting from UNI */
if (conn->state == CONN_AB_FLUSH_IND)
break;
if (conn->state != CONN_ACTIVE)
goto bad_state;
/* ignore */
break;
case CONN_SIG_PARTY_ADD_ACK_IND:
{
/* ADD PARTY ACKNOWLEDGE from UNI */
struct uni_msg *msg = arg;
struct uniapi_add_party_ack_indication *ind = uni_msg_rptr(msg,
struct uniapi_add_party_ack_indication *);
if (conn->state == CONN_AB_FLUSH_IND)
break;
if (conn->state != CONN_ACTIVE)
goto bad_state;
cc_party_add_ack_ind(conn, &ind->ack.epref);
break;
}
case CONN_SIG_PARTY_ADD_REJ_IND:
{
/* ADD PARTY REJECT indication */
struct uni_msg *msg = arg;
struct uniapi_add_party_rej_indication *ind = uni_msg_rptr(msg,
struct uniapi_add_party_rej_indication *);
if (conn->state == CONN_AB_FLUSH_IND)
break;
if (conn->state != CONN_ACTIVE)
goto bad_state;
memset(&conn->user->cause[1], 0, sizeof(conn->user->cause[1]));
conn->user->cause[0] = ind->rej.cause;
cc_party_add_rej_ind(conn, &ind->rej.epref);
break;
}
case CONN_SIG_DROP_PARTY_IND:
{
/* DROP_PARTY.indication from UNI */
struct uni_msg *msg = arg;
struct uniapi_drop_party_indication *ind = uni_msg_rptr(msg,
struct uniapi_drop_party_indication *);
struct uniapi_drop_party_ack_request *req;
struct uni_msg *u;
if (conn->state == CONN_AB_FLUSH_IND)
break;
if (conn->state != CONN_ACTIVE)
goto bad_state;
party = cc_party_find(conn, ind->drop.epref.epref);
if (party == NULL) {
cc_party_log(party, "no party for %s",
cc_conn_sigtab[sig]);
break;
}
u = uni_msg_alloc(sizeof(*req));
if (u == NULL)
return;
memset(&conn->user->cause[1], 0, sizeof(conn->user->cause[1]));
conn->user->cause[0] = ind->drop.cause;
switch (party->state) {
default:
cc_party_log(party, "bad state %s for DROP.ind",
ptab[party->state]);
/* FALLTHRU */
case PARTY_ACTIVE: /* P1 -> P9 */
cc_party_set_state(party, PARTY_WAIT_DROP_ACK_OK);
break;
case PARTY_ADD_WAIT_ACK: /* P4 -> P12 */
cc_party_set_state(party, PARTY_ADD_DROPACK_WAIT_OK);
break;
}
/*
* Construct message to UNI.
*/
req = uni_msg_wptr(u, struct uniapi_drop_party_ack_request *);
memset(req, 0, sizeof(*req));
u->b_wptr += sizeof(*req);
IE_SETPRESENT(req->ack.epref);
req->ack.hdr.act = UNI_MSGACT_DEFAULT;
req->ack.hdr.cref = conn->cref;
req->ack.epref.flag = 0;
req->ack.epref.epref = ind->drop.epref.epref;
cc_send_uni(conn, UNIAPI_DROP_PARTY_ACK_request, u);
break;
}
case CONN_SIG_OK:
{
/* OK response from UNI */
struct ccuser *user = conn->user;
switch (conn->state) {
case CONN_OUT_WAIT_OK: /* C3 */
cc_conn_set_state(conn, CONN_OUT_WAIT_CONF);
if (conn->user != NULL)
cc_user_sig(conn->user,
USER_SIG_CONNECT_OUTGOING_OK, NULL, 0);
break;
case CONN_AB_WAIT_RESP_OK: /* C33 */
case CONN_AB_WAIT_REQ_OK: /* C34 */
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
break;
case CONN_REL_WAIT_OK: /* C20 */
case CONN_REL_IN_WAIT_OK: /* C15 */
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
if (conn->user != NULL) {
/* connection has not been aborted */
memset(&conn->user->cause, 0,
sizeof(conn->user->cause));
cc_user_sig(conn->user,
USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
}
break;
case CONN_IN_WAIT_ACCEPT_OK: /* C12 */
if (user == NULL) {
/* has been aborted */
do_release_request(conn, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_REQ_OK);
break;
}
cc_conn_set_state(conn, CONN_IN_WAIT_COMPL);
cc_disconnect_from_user(conn);
cc_user_sig(user, USER_SIG_ACCEPT_OK, NULL, 0);
if (conn->acceptor == NULL) {
do_release_request(conn, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_REQ_OK);
break;
}
cc_connect_to_user(conn, conn->acceptor);
cc_conn_reset_acceptor(conn);
cc_user_sig(conn->user, USER_SIG_ACCEPTING, NULL, 0);
break;
case CONN_REJ_WAIT_OK: /* C14 */
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
if (user != NULL) {
cc_disconnect_from_user(conn);
cc_user_sig(user, USER_SIG_REJECT_OK, NULL, 0);
}
break;
default:
/* maybe it's for a party */
LIST_FOREACH(party, &conn->parties, link) {
switch (party->state) {
case PARTY_ADD_WAIT_OK: /* P3 */
if (user != NULL)
cc_user_sig(user,
USER_SIG_ADD_PARTY_OK,
NULL, 0);
cc_party_set_state(party,
PARTY_ADD_WAIT_ACK);
goto ex_party_ok;
case PARTY_DROP_WAIT_OK: /* P5 */
cc_party_set_state(party,
PARTY_DROP_WAIT_ACK);
goto ex_party_ok;
case PARTY_WAIT_DROP_ACK_OK: /* P9 */
case PARTY_ADD_DROPACK_WAIT_OK:/* P12 */
{
struct ccparty *p1;
cc_party_set_state(party,
PARTY_WAIT_DESTROY);
/* signal to user only if there are any other parties */
LIST_FOREACH(p1, &conn->parties, link)
if (p1 != party)
break;
if (p1 != NULL && user != NULL)
cc_user_sig(user,
USER_SIG_DROP_PARTY_IND,
NULL,
party->epref.epref);
goto ex_party_ok;
}
case PARTY_ADD_DROP_WAIT_OK: /* P11 */
cc_party_set_state(party,
PARTY_DROP_WAIT_ACK);
goto ex_party_ok;
default:
break;
}
}
goto bad_state;
ex_party_ok:
break;
}
break;
}
case CONN_SIG_ERROR:
{
/* error response from UNI */
u_int reason = (iarg >> 16) & 0xffff;
u_int state = iarg & 0xffff;
struct ccuser *user = conn->user;
switch (conn->state) {
case CONN_OUT_WAIT_CREATE: /* C2 */
cc_conn_rem_port(conn);
cc_conn_set_state(conn, CONN_OUT_PREPARING);
if (conn->user != NULL)
cc_user_sig(conn->user,
USER_SIG_CONNECT_OUTGOING_ERR,
NULL, ATM_MKUNIERR(reason));
break;
case CONN_OUT_WAIT_OK: /* C3 */
cc_conn_set_state(conn, CONN_OUT_WAIT_DESTROY);
conn->reason = reason;
break;
case CONN_AB_WAIT_REQ_OK: /* C33 */
if (state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, conn->cause);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
break;
}
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
break;
case CONN_AB_WAIT_RESP_OK: /* C34 */
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
break;
case CONN_REL_WAIT_OK: /* C20 */
if (user == NULL) {
/* connection has been aborted. */
if (state == UNI_CALLSTATE_U10) {
/* do what we can */
do_release_request(conn, conn->cause);
cc_conn_set_state(conn,
CONN_AB_WAIT_REQ_OK);
} else if (state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn,
CONN_AB_WAIT_RESP_OK);
} else {
cc_conn_set_state(conn,
CONN_AB_FLUSH_IND);
}
break;
}
if (state == UNI_CALLSTATE_U10) {
cc_conn_set_state(conn, CONN_ACTIVE);
cc_user_sig(conn->user, USER_SIG_RELEASE_ERR,
NULL, reason);
} else if (state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
memset(&conn->user->cause, 0,
sizeof(conn->user->cause));
cc_user_sig(conn->user,
USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
} else {
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
memset(&conn->user->cause, 0,
sizeof(conn->user->cause));
cc_user_sig(conn->user,
USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
}
break;
case CONN_IN_WAIT_ACCEPT_OK: /* C12 */
if (user == NULL) {
/* connection was aborted */
if (state == UNI_CALLSTATE_U6 ||
state == UNI_CALLSTATE_U7 ||
state == UNI_CALLSTATE_U9 ||
state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn,
CONN_AB_WAIT_RESP_OK);
} else {
cc_conn_set_state(conn,
CONN_AB_FLUSH_IND);
}
break;
}
cc_conn_reset_acceptor(conn);
if (state == UNI_CALLSTATE_U6 ||
state == UNI_CALLSTATE_U9 ||
state == UNI_CALLSTATE_U7) {
cc_user_sig(user, USER_SIG_ACCEPT_ERR,
NULL, ATM_MKUNIERR(reason));
cc_conn_set_state(conn, CONN_IN_ARRIVED);
} else if (state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, NULL);
cc_disconnect_from_user(conn);
cc_user_sig(user, USER_SIG_ACCEPT_ERR,
user, ATMERR_PREVIOUSLY_ABORTED);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
} else {
cc_disconnect_from_user(conn);
cc_user_sig(user, USER_SIG_ACCEPT_ERR,
user, ATMERR_PREVIOUSLY_ABORTED);
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
}
break;
case CONN_REJ_WAIT_OK: /* C14 */
if (user == NULL) {
/* connection has been aborted. */
if (state == UNI_CALLSTATE_U6 ||
state == UNI_CALLSTATE_U7 ||
state == UNI_CALLSTATE_U9 ||
state == UNI_CALLSTATE_U12) {
/* do what we can */
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn,
CONN_AB_WAIT_RESP_OK);
} else {
cc_conn_set_state(conn,
CONN_AB_FLUSH_IND);
}
break;
}
if (state == UNI_CALLSTATE_U6 ||
state == UNI_CALLSTATE_U9 ||
state == UNI_CALLSTATE_U7) {
cc_user_sig(user, USER_SIG_REJECT_ERR,
NULL, ATM_MKUNIERR(reason));
cc_conn_set_state(conn, CONN_IN_ARRIVED);
} else {
cc_disconnect_from_user(conn);
cc_user_sig(user, USER_SIG_REJECT_OK, NULL, 0);
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
}
break;
case CONN_REL_IN_WAIT_OK: /* C15 */
if (user == NULL) {
/* connection has been aborted. */
if (state == UNI_CALLSTATE_U8) {
/* do what we can */
do_release_request(conn, conn->cause);
cc_conn_set_state(conn,
CONN_AB_WAIT_REQ_OK);
} else if (state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn,
CONN_AB_WAIT_RESP_OK);
} else {
cc_conn_set_state(conn,
CONN_AB_FLUSH_IND);
}
break;
}
if (state == UNI_CALLSTATE_U8) {
cc_conn_set_state(conn, CONN_IN_WAIT_COMPL);
cc_user_sig(conn->user, USER_SIG_RELEASE_ERR,
NULL, reason);
} else if (state == UNI_CALLSTATE_U12) {
do_release_response(conn, 0, NULL);
cc_conn_set_state(conn, CONN_AB_WAIT_RESP_OK);
memset(&conn->user->cause, 0,
sizeof(conn->user->cause));
cc_user_sig(conn->user,
USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
} else {
cc_conn_set_state(conn, CONN_AB_FLUSH_IND);
memset(&conn->user->cause, 0,
sizeof(conn->user->cause));
cc_user_sig(conn->user,
USER_SIG_RELEASE_CONFIRM, NULL, 0);
cc_disconnect_from_user(conn);
}
break;
default:
/* maybe it's for a party */
LIST_FOREACH(party, &conn->parties, link) {
switch (party->state) {
case PARTY_ADD_WAIT_CREATE: /* P2 */
cc_party_destroy(party);
if (user != NULL)
cc_user_sig(user,
USER_SIG_ADD_PARTY_ERR,
NULL, ATM_MKUNIERR(reason));
goto ex_party_err;
case PARTY_ADD_WAIT_OK: /* P3 */
cc_party_set_state(party,
PARTY_WAIT_DESTROY);
if (user != NULL)
cc_user_sig(user,
USER_SIG_ADD_PARTY_ERR,
NULL, ATM_MKUNIERR(reason));
goto ex_party_err;
case PARTY_DROP_WAIT_OK: /* P5 */
cc_party_set_state(party,
PARTY_ACTIVE);
if (user != NULL)
cc_user_sig(user,
USER_SIG_DROP_PARTY_ERR,
NULL, ATM_MKUNIERR(reason));
goto ex_party_err;
case PARTY_WAIT_DROP_ACK_OK: /* P9 */
cc_party_set_state(party,
PARTY_ACTIVE);
goto ex_party_err;
case PARTY_ADD_DROP_WAIT_OK: /* P11 */
cc_party_set_state(party,
PARTY_ADD_WAIT_ACK);
if (user != NULL)
cc_user_sig(user,
USER_SIG_DROP_PARTY_ERR,
NULL, ATM_MKUNIERR(reason));
goto ex_party_err;
case PARTY_ADD_DROPACK_WAIT_OK:/* P12 */
cc_party_set_state(party,
PARTY_ADD_WAIT_ACK);
goto ex_party_err;
default:
break;
}
}
cc_conn_log(conn, "unexpected reason=%u ustate=%u "
"state=%s\n", reason, state, stab[conn->state]);
ex_party_err:
break;
}
break;
}
case CONN_SIG_PARTY_CREATED:
{
struct uni_msg *msg = arg;
struct uniapi_party_created *pcr = uni_msg_rptr(msg,
struct uniapi_party_created *);
party = cc_party_find(conn, pcr->epref.epref);
if (party == NULL) {
/* for incoming connections we see the party-created
* immediately after the call-create so that we
* must be in C10 */
switch (conn->state) {
case CONN_IN_PREPARING:
party = cc_party_create(conn,
pcr->epref.epref, 1);
if (party == NULL)
break;
cc_party_set_state(party,
PARTY_WAIT_SETUP_COMPL);
break;
case CONN_OUT_WAIT_OK:
party = cc_party_create(conn,
pcr->epref.epref, 0);
if (party == NULL)
break;
cc_party_set_state(party,
PARTY_WAIT_SETUP_CONF);
break;
default:
goto bad_state;
}
break;
}
/* this is for an ADD-PARTY */
if (conn->state != CONN_ACTIVE)
goto bad_state;
if (party->state != PARTY_ADD_WAIT_CREATE)
goto bad_party_state;
cc_party_set_state(party, PARTY_ADD_WAIT_OK);
break;
}
case CONN_SIG_PARTY_DESTROYED:
{
struct uni_msg *msg = arg;
struct uniapi_party_destroyed *pcr = uni_msg_rptr(msg,
struct uniapi_party_destroyed *);
party = cc_party_find(conn, pcr->epref.epref);
if (party == NULL) {
cc_conn_log(conn, "no party to destroy %u/%u",
pcr->epref.flag, pcr->epref.epref);
break;
}
cc_party_destroy(party);
break;
}
}
return;
bad_state:
cc_conn_log(conn, "bad state=%s for signal=%s",
stab[conn->state], cc_conn_sigtab[sig]);
return;
bad_party_state:
cc_conn_log(conn, "bad party state=%s for signal=%s",
ptab[party->state], cc_conn_sigtab[sig]);
return;
}