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Better call distribution algorithm

master
MelwareDE 2010-10-26 22:22:25 +00:00
parent fd7c663caf
commit 17658c5edf
3 changed files with 53 additions and 31 deletions
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6
capi.conf
View File

@ -91,4 +91,10 @@ devices=2 ;number of concurrent calls (B-Channels) on this controller
; 65535 - suppres invocation code
;mwimailbox=12345 ;',' separated list of mailboxes for MWI in format:
; mailbox[:controlling user number[:controlling user provided number]][@context]
;hlimit=10 ;Do not use this controller for outgoing calls if less than 'hlimit' free channels is
;left on this controller.
;slimit=10 ;Try to use for outgoing calls other controller in group if less than 'slimit' free
;channels is left on this controller. Always try to 'fill up' the controller with
;smalest number in group. Create call if less than 'slimit' free channels left and
;no other controller with respect to free channel count was found in group.

68
chan_capi.c
View File

@ -211,7 +211,9 @@ static char global_mohinterpret[MAX_MUSICCLASS] = "default";
#endif
/* local prototypes */
#define CC_B_INTERFACE_NOT_FREE(__x__) (((__x__)->used) || ((__x__)->channeltype != CAPI_CHANNELTYPE_B))
#define CC_B_INTERFACE_NOT_FREE(__x__) (((__x__)->used) || \
((__x__)->channeltype != CAPI_CHANNELTYPE_B) || \
(capi_controllers[(__x__)->controller]->nfreebchannels < capi_controllers[(__x__)->controller]->nfreebchannelsHardThr))
static int pbx_capi_hold(struct ast_channel *c, char *param);
static int pbx_capi_retrieve(struct ast_channel *c, char *param);
@ -232,7 +234,7 @@ static void pbx_capi_add_diva_protocol_independent_extension(
static void pbx_capi_interface_status_changed(int controller, diva_status_interface_state_t newInterfaceState);
static void pbx_capi_hw_status_changed(int controller, diva_status_hardware_state_t newHwState);
#endif
static int pbx_capi_check_controller_status(struct capi_pvt *currentChannel, ast_group_t capigroup);
static int pbx_capi_check_controller_status(int controller);
/*
* B protocol settings
@ -2440,7 +2442,7 @@ static struct ast_channel *
pbx_capi_request(const char *type, int format, void *data, int *cause)
#endif
{
struct capi_pvt *i;
struct capi_pvt *i, *bestChannel;
struct ast_channel *tmp = NULL;
char *dest, *interface, *param, *ocid;
char buffer[CAPI_MAX_STRING];
@ -2484,7 +2486,7 @@ pbx_capi_request(const char *type, int format, void *data, int *cause)
cc_mutex_lock(&iflock);
for (i = capi_iflist; i; i = i->next) {
for (i = capi_iflist, bestChannel = 0; i; i = i->next) {
if (CC_B_INTERFACE_NOT_FREE(i)) {
/* if already in use or no real channel */
continue;
@ -2495,7 +2497,7 @@ pbx_capi_request(const char *type, int format, void *data, int *cause)
if (i->controller != controller) {
/* keep on running! */
continue;
} else if (pbx_capi_check_controller_status(i, 0) != 0) {
} else if (pbx_capi_check_controller_status(i->controller) < 0) {
break;
}
} else {
@ -2503,16 +2505,32 @@ pbx_capi_request(const char *type, int format, void *data, int *cause)
if (interface[0] == 'g') {
if ((i->group & capigroup) == 0)
continue; /* not in group, keep on running! */
if (pbx_capi_check_controller_status(i, capigroup) != 0)
if (pbx_capi_check_controller_status(i->controller) < 0)
continue; /* not active or better interface found, keep on running! */
if (capi_controllers[i->controller]->nfreebchannelsSoftThr != 0) {
if (bestChannel == 0) {
bestChannel = i;
} else if (i->controller != bestChannel->controller) {
int idiff = capi_controllers[i->controller]->nfreebchannels - capi_controllers[i->controller]->nfreebchannelsSoftThr;
int bdiff = capi_controllers[bestChannel->controller]->nfreebchannels - capi_controllers[bestChannel->controller]->nfreebchannelsSoftThr;
int c = (i->controller < bestChannel->controller);
if ((c && (idiff >= 0)) || ((bdiff < 0) && (idiff >= 0)) || ((bdiff < 0) && (idiff > bdiff))) {
bestChannel = i;
}
}
continue; /* Continue search for best channel */
}
} else if (strcmp(interface, i->name) != 0) {
/* DIAL(CAPI/<interface-name>/...) */
/* keep on running! */
continue;
} else if (pbx_capi_check_controller_status(i, 0) != 0) {
} else if (pbx_capi_check_controller_status(i->controller) < 0) {
break;
}
}
found_best_channel:
/* when we come here, we found a free controller match */
cc_copy_string(i->dnid, dest, sizeof(i->dnid));
tmp = capi_new(i, AST_STATE_RESERVED,
@ -2532,6 +2550,11 @@ pbx_capi_request(const char *type, int format, void *data, int *cause)
cc_mutex_unlock(&iflock);
return tmp;
}
if (bestChannel != 0) {
i = bestChannel;
goto found_best_channel;
}
cc_mutex_unlock(&iflock);
cc_verbose(2, 0, VERBOSE_PREFIX_3 "didn't find " CC_MESSAGE_NAME
" device for interface '%s'\n", interface);
@ -7700,6 +7723,8 @@ int mkif(struct cc_capi_conf *conf)
capi_controllers[unit]->used = 1;
capi_controllers[unit]->ecPath = conf->echocancelpath;
capi_controllers[unit]->ecOnTransit = conf->econtransitconn;
capi_controllers[unit]->nfreebchannelsHardThr = conf->hlimit;
capi_controllers[unit]->nfreebchannelsSoftThr = conf->slimit;
mwiController = capi_controllers[unit];
tmp->controller = unit;
@ -8627,6 +8652,8 @@ static int conf_interface(struct cc_capi_conf *conf, struct ast_variable *v)
CONF_INTEGER_SAFE(conf->mwifacptynrpres, "mwifacptynrpres", 0, 0x7f)
CONF_INTEGER_SAFE(conf->mwibasicservice, "mwibasicservice", 0, 0xff)
CONF_INTEGER_SAFE(conf->mwiinvocation, "mwiinvocation", 0, 0xffff)
CONF_INTEGER_SAFE(conf->hlimit, "hlimit", 0, 0xff)
CONF_INTEGER_SAFE(conf->slimit, "slimit", 0, 0xff)
if (!strcasecmp(v->name, "mwimailbox")) {
conf->mwimailbox = ast_strdup(v->value);
continue;
@ -9194,12 +9221,9 @@ static void pbx_capi_hw_status_changed(int controller, diva_status_hardware_stat
\note The core runs twice over the interface list, but this allows to preserve
the structure of the original code which uses this function.
*/
static int pbx_capi_check_controller_status(struct capi_pvt *currentChannel, ast_group_t capigroup)
static int pbx_capi_check_controller_status(int capiController)
{
#ifdef DIVA_STATUS
int capiController = currentChannel->controller;
struct capi_pvt *newChannel;
if (capi_controllers[capiController]->interfaceState == (int)DivaStatusInterfaceStateOK) /* known, OK */
return 0;
@ -9207,28 +9231,10 @@ static int pbx_capi_check_controller_status(struct capi_pvt *currentChannel, ast
return -1;
/*
The state of interface is unknown. Look if it is other interface which belongs
to requested group with known state and free capi_pvt associated with this interface
*/
if ((capigroup == 0) || (diva_status_available() != 0))
return (0); /* Status information not available, use this interface */
for (newChannel = currentChannel->next; (newChannel != 0); newChannel = newChannel->next) {
if (CC_B_INTERFACE_NOT_FREE(newChannel)) {
continue;
}
if ((newChannel->controller != capiController) &&
((newChannel->group & capigroup) != 0) &&
(capi_controllers[newChannel->controller]->interfaceState == (int)DivaStatusInterfaceStateOK)) {
return (-1); /* Found better interface */
}
}
/*
No better channel found, use this interface
Unknown interface state
*/
#endif
return 0;
return 1;
}

10
chan_capi.h
View File

@ -642,6 +642,9 @@ struct cc_capi_conf {
int mwiinvocation;
char* mwimailbox;
int hlimit;
int slimit;
};
struct cc_capi_controller;
@ -671,6 +674,13 @@ struct cc_capi_controller {
int nbchannels;
/* free bchans */
int nfreebchannels;
/* Controller considered BUSY amount if free channels below
of this level */
int nfreebchannelsHardThr;
/* If amount of free channels is below this level then
try to allocate call on other controler in group
where this level is not reached or difference is less */
int nfreebchannelsSoftThr;
/* features: */
int broadband;
int dtmf;