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Add true native data mode bridging 

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@1410 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
markster 2003-08-23 17:49:54 +00:00
parent 8cc1311826
commit 2f5fde9d98
2 changed files with 123 additions and 42 deletions
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1
CHANGES
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@ -1,3 +1,4 @@
-- True data mode bridging when possible
-- H.323 build improvements
-- Agent Callback-login support
-- RFC2833 Improvements

164
channels/chan_zap.c
View File

@ -329,7 +329,7 @@ struct zt_subchannel {
int needanswer;
int linear;
int inthreeway;
int curconfno; /* What conference we're currently in */
ZT_CONFINFO curconf;
};
#define CONF_USER_REAL (1 << 0)
@ -658,7 +658,7 @@ static int unalloc_sub(struct zt_pvt *p, int x)
p->subs[x].chan = 0;
p->subs[x].owner = NULL;
p->subs[x].inthreeway = 0;
p->subs[x].curconfno = -1;
memset(&p->subs[x].curconf, 0, sizeof(p->subs[x].curconf));
return 0;
}
@ -818,46 +818,62 @@ static char *sig2str(int sig)
}
}
static int conf_add(int *confno, struct zt_subchannel *c, int index)
static int conf_add(struct zt_pvt *p, struct zt_subchannel *c, int index, int slavechannel)
{
/* If the conference already exists, and we're already in it
don't bother doing anything */
ZT_CONFINFO zi;
if ((*confno > 0) && (c->curconfno == *confno))
return 0;
if (c->curconfno > 0) {
ast_log(LOG_WARNING, "Subchannel %d is already in conference %d, moving to %d\n", c->zfd, c->curconfno, *confno);
}
if (c->zfd < 0)
return 0;
memset(&zi, 0, sizeof(zi));
zi.chan = 0;
zi.confno = *confno;
if (!index) {
/* Real-side and pseudo-side both participate in conference */
zi.confmode = ZT_CONF_REALANDPSEUDO | ZT_CONF_TALKER | ZT_CONF_LISTENER |
ZT_CONF_PSEUDO_TALKER | ZT_CONF_PSEUDO_LISTENER;
} else
zi.confmode = ZT_CONF_CONF | ZT_CONF_TALKER | ZT_CONF_LISTENER;
if (slavechannel > 0) {
/* If we have only one slave, do a digital mon */
zi.confmode = ZT_CONF_DIGITALMON;
zi.confno = slavechannel;
} else {
if (!index) {
/* Real-side and pseudo-side both participate in conference */
zi.confmode = ZT_CONF_REALANDPSEUDO | ZT_CONF_TALKER | ZT_CONF_LISTENER |
ZT_CONF_PSEUDO_TALKER | ZT_CONF_PSEUDO_LISTENER;
} else
zi.confmode = ZT_CONF_CONF | ZT_CONF_TALKER | ZT_CONF_LISTENER;
zi.confno = p->confno;
}
if ((zi.confno == c->curconf.confno) && (zi.confmode == c->curconf.confmode))
return 0;
if (c->zfd < 0)
return 0;
if (ioctl(c->zfd, ZT_SETCONF, &zi)) {
ast_log(LOG_WARNING, "Failed to add %d to conference %d\n", c->zfd, *confno);
ast_log(LOG_WARNING, "Failed to add %d to conference %d/%d\n", c->zfd, zi.confmode, zi.confno);
return -1;
}
c->curconfno = zi.confno;
*confno = zi.confno;
ast_log(LOG_DEBUG, "Added %d to conference %d\n", c->zfd, *confno);
if (slavechannel < 1) {
p->confno = zi.confno;
}
memcpy(&c->curconf, &zi, sizeof(c->curconf));
ast_log(LOG_DEBUG, "Added %d to conference %d/%d\n", c->zfd, c->curconf.confmode, c->curconf.confno);
return 0;
}
static int conf_del(int *confno, struct zt_subchannel *c, int index)
static int isourconf(struct zt_pvt *p, struct zt_subchannel *c)
{
/* If they're listening to our channel, they're ours */
if ((p->channel == c->curconf.confno) && (c->curconf.confmode == ZT_CONF_DIGITALMON))
return 1;
/* If they're a talker on our (allocated) conference, they're ours */
if ((p->confno > 0) && (p->confno == c->curconf.confno) && (c->curconf.confmode & ZT_CONF_TALKER))
return 1;
return 0;
}
static int conf_del(struct zt_pvt *p, struct zt_subchannel *c, int index)
{
ZT_CONFINFO zi;
/* Can't delete from this conference if it's not 0 */
if ((*confno < 1) ||
/* Can't delete if there's no zfd */
if (/* Can't delete if there's no zfd */
(c->zfd < 0) ||
/* Don't delete from the conference if it's not our conference */
(*confno != c->curconfno)
!isourconf(p, c)
/* Don't delete if we don't think it's conferenced at all (implied) */
) return 0;
memset(&zi, 0, sizeof(zi));
@ -865,43 +881,105 @@ static int conf_del(int *confno, struct zt_subchannel *c, int index)
zi.confno = 0;
zi.confmode = 0;
if (ioctl(c->zfd, ZT_SETCONF, &zi)) {
ast_log(LOG_WARNING, "Failed to drop %d from conference %d\n", c->zfd, *confno);
ast_log(LOG_WARNING, "Failed to drop %d from conference %d/%d\n", c->zfd, c->curconf.confmode, c->curconf.confno);
return -1;
}
c->curconfno = -1;
ast_log(LOG_DEBUG, "Removed %d from conference %d\n", c->zfd, *confno);
ast_log(LOG_DEBUG, "Removed %d from conference %d/%d\n", c->zfd, c->curconf.confmode, c->curconf.confno);
memcpy(&c->curconf, &zi, sizeof(c->curconf));
return 0;
}
static int isslavenative(struct zt_pvt *p, struct zt_pvt **out)
{
int x;
int useslavenative;
struct zt_pvt *slave = NULL;
/* Start out optimistic */
useslavenative = 1;
/* Update conference state in a stateless fashion */
for (x=0;x<3;x++) {
/* Any three-way calling makes slave native mode *definitely* out
of the question */
if ((p->subs[x].zfd > -1) && p->subs[x].inthreeway)
useslavenative = 0;
}
/* If we don't have any 3-way calls, check to see if we have
precisely one slave */
if (useslavenative) {
for (x=0;x<MAX_SLAVES;x++) {
if (p->slaves[x]) {
if (slave) {
/* Whoops already have a slave! No
slave native and stop right away */
slave = NULL;
useslavenative = 0;
break;
} else {
/* We have one slave so far */
slave = p->slaves[x];
}
}
}
}
/* If no slave, slave native definitely out */
if (!slave)
useslavenative = 0;
else if (slave->law != p->law) {
useslavenative = 0;
slave = NULL;
}
if (out)
*out = slave;
return useslavenative;
}
static int update_conf(struct zt_pvt *p)
{
int needconf = 0;
int x;
/* Update conference state in a stateless fashion */
int useslavenative;
struct zt_pvt *slave = NULL;
useslavenative = isslavenative(p, &slave);
/* Start with the obvious, general stuff */
for (x=0;x<3;x++) {
/* Look for three way calls */
if ((p->subs[x].zfd > -1) && p->subs[x].inthreeway) {
conf_add(&p->confno, &p->subs[x], x);
conf_add(p, &p->subs[x], x, 0);
needconf++;
} else {
conf_del(&p->confno, &p->subs[x], x);
conf_del(p, &p->subs[x], x);
}
}
/* If we have a slave, add him to our conference now */
/* If we have a slave, add him to our conference now. or DAX
if this is slave native */
for (x=0;x<MAX_SLAVES;x++) {
if (p->slaves[x]) {
conf_add(&p->confno, &p->slaves[x]->subs[SUB_REAL], SUB_REAL);
needconf++;
if (useslavenative)
conf_add(p, &p->slaves[x]->subs[SUB_REAL], SUB_REAL, p->channel);
else {
conf_add(p, &p->slaves[x]->subs[SUB_REAL], SUB_REAL, 0);
needconf++;
}
}
}
/* If we're supposed to be in there, do so now */
if (p->inconference && !p->subs[SUB_REAL].inthreeway) {
conf_add(&p->confno, &p->subs[SUB_REAL], SUB_REAL);
needconf++;
if (useslavenative)
conf_add(p, &p->subs[SUB_REAL], SUB_REAL, slave->channel);
else {
conf_add(p, &p->subs[SUB_REAL], SUB_REAL, 0);
needconf++;
}
}
/* If we have a master, add ourselves to his conference */
if (p->master)
conf_add(&p->master->confno, &p->subs[SUB_REAL], SUB_REAL);
if (p->master) {
if (isslavenative(p->master, NULL)) {
conf_add(p->master, &p->subs[SUB_REAL], SUB_REAL, p->master->channel);
} else {
conf_add(p->master, &p->subs[SUB_REAL], SUB_REAL, 0);
}
}
if (!needconf) {
/* Nobody is left (or should be left) in our conference.
Kill it. */
@ -1989,7 +2067,8 @@ static void zt_unlink(struct zt_pvt *slave, struct zt_pvt *master)
if (!slave || (master->slaves[x] == slave)) {
/* Take slave out of the conference */
ast_log(LOG_DEBUG, "Unlinking slave %d from %d\n", master->slaves[x]->channel, master->channel);
conf_del(&master->confno, &master->slaves[x]->subs[SUB_REAL], SUB_REAL);
conf_del(master, &master->slaves[x]->subs[SUB_REAL], SUB_REAL);
conf_del(master->slaves[x], &master->subs[SUB_REAL], SUB_REAL);
master->slaves[x]->master = NULL;
master->slaves[x] = NULL;
} else
@ -2001,7 +2080,8 @@ static void zt_unlink(struct zt_pvt *slave, struct zt_pvt *master)
if (!slave) {
if (master->master) {
/* Take master out of the conference */
conf_del(&master->master->confno, &master->subs[SUB_REAL], SUB_REAL);
conf_del(master->master, &master->subs[SUB_REAL], SUB_REAL);
conf_del(master, &master->master->subs[SUB_REAL], SUB_REAL);
hasslaves = 0;
for (x=0;x<MAX_SLAVES;x++) {
if (master->master->slaves[x] == master)
@ -2472,7 +2552,7 @@ static int check_for_conference(struct zt_pvt *p)
/* If we have no master and don't have a confno, then
if we're in a conference, it's probably a MeetMe room or
some such, so don't let us 3-way out! */
if (ci.confno) {
if ((p->subs[SUB_REAL].curconf.confno != ci.confno) || (p->subs[SUB_REAL].curconf.confmode != ci.confmode)) {
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Avoiding 3-way call when in an external conference\n");
return 1;