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sca_appearance.c
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sca_appearance.c
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/*
* Copyright (C) 2012 Andrew Mortensen
*
* This file is part of the sca module for Kamailio, a free SIP server.
*
* The sca module is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* The sca module is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA. 02110-1301 USA
*/
#include "sca_common.h"
#include "../../core/strutils.h"
#include "sca.h"
#include "sca_appearance.h"
#include "sca_hash.h"
#include "sca_notify.h"
#include "sca_util.h"
const str SCA_APPEARANCE_INDEX_STR = STR_STATIC_INIT("appearance-index");
const str SCA_APPEARANCE_STATE_STR = STR_STATIC_INIT("appearance-state");
const str SCA_APPEARANCE_URI_STR = STR_STATIC_INIT("appearance-uri");
const str SCA_APPEARANCE_STATE_STR_IDLE = STR_STATIC_INIT("idle");
const str SCA_APPEARANCE_STATE_STR_SEIZED = STR_STATIC_INIT("seized");
const str SCA_APPEARANCE_STATE_STR_PROGRESSING = STR_STATIC_INIT("progressing");
const str SCA_APPEARANCE_STATE_STR_ALERTING = STR_STATIC_INIT("alerting");
const str SCA_APPEARANCE_STATE_STR_ACTIVE = STR_STATIC_INIT("active");
const str SCA_APPEARANCE_STATE_STR_HELD = STR_STATIC_INIT("held");
const str SCA_APPEARANCE_STATE_STR_HELD_PRIVATE =
STR_STATIC_INIT("held-private");
const str SCA_APPEARANCE_STATE_STR_UNKNOWN = STR_STATIC_INIT("unknown");
// STR_ACTIVE is repeated, once for ACTIVE_PENDING, once for ACTIVE
const str *state_names[] = {
&SCA_APPEARANCE_STATE_STR_IDLE,
&SCA_APPEARANCE_STATE_STR_SEIZED,
&SCA_APPEARANCE_STATE_STR_PROGRESSING,
&SCA_APPEARANCE_STATE_STR_ALERTING,
&SCA_APPEARANCE_STATE_STR_ACTIVE,
&SCA_APPEARANCE_STATE_STR_ACTIVE,
&SCA_APPEARANCE_STATE_STR_HELD,
&SCA_APPEARANCE_STATE_STR_HELD_PRIVATE,
};
#define SCA_APPEARANCE_STATE_NAME_COUNT \
(sizeof(state_names) / sizeof(state_names[0]))
void sca_appearance_state_to_str(int state, str *state_str)
{
assert(state_str != NULL);
if(state >= SCA_APPEARANCE_STATE_NAME_COUNT || state < 0) {
state_str->len = SCA_APPEARANCE_STATE_STR_UNKNOWN.len;
state_str->s = SCA_APPEARANCE_STATE_STR_UNKNOWN.s;
return;
}
state_str->len = state_names[state]->len;
state_str->s = state_names[state]->s;
}
int sca_appearance_state_from_str(str *state_str)
{
int state;
assert(state_str != NULL);
for(state = 0; state < SCA_APPEARANCE_STATE_NAME_COUNT; state++) {
if(SCA_STR_EQ(state_str, state_names[state])) {
break;
}
}
if(state >= SCA_APPEARANCE_STATE_NAME_COUNT) {
state = SCA_APPEARANCE_STATE_UNKNOWN;
}
return (state);
}
sca_appearance *sca_appearance_create(int appearance_index, str *owner_uri)
{
sca_appearance *new_appearance = NULL;
// we use multiple shm_malloc calls here because uri, owner,
// dialog and callee are mutable. could also shm_malloc a big
// block and divide it among the strs....
new_appearance = (sca_appearance *)shm_malloc(sizeof(sca_appearance));
if(new_appearance == NULL) {
LM_ERR("Failed to shm_malloc new sca_appearance for %.*s, index %d\n",
STR_FMT(owner_uri), appearance_index);
goto error;
}
memset(new_appearance, 0, sizeof(sca_appearance));
new_appearance->owner.s = (char *)shm_malloc(owner_uri->len);
if(new_appearance->owner.s == NULL) {
LM_ERR("Failed to shm_malloc space for owner %.*s, index %d\n",
STR_FMT(owner_uri), appearance_index);
goto error;
}
SCA_STR_COPY(&new_appearance->owner, owner_uri);
new_appearance->index = appearance_index;
new_appearance->times.ctime = time(NULL);
sca_appearance_update_state_unsafe(
new_appearance, SCA_APPEARANCE_STATE_IDLE);
new_appearance->next = NULL;
return (new_appearance);
error:
if(new_appearance != NULL) {
if(!SCA_STR_EMPTY(&new_appearance->owner)) {
shm_free(new_appearance->owner.s);
}
shm_free(new_appearance);
}
return (NULL);
}
void sca_appearance_free(sca_appearance *appearance)
{
if(appearance != NULL) {
if(appearance->owner.s != NULL) {
shm_free(appearance->owner.s);
}
if(appearance->uri.s != NULL) {
shm_free(appearance->uri.s);
}
if(appearance->dialog.id.s != NULL) {
shm_free(appearance->dialog.id.s);
}
if(appearance->prev_owner.s != NULL) {
shm_free(appearance->prev_owner.s);
}
if(appearance->prev_callee.s != NULL) {
shm_free(appearance->prev_callee.s);
}
if(appearance->prev_dialog.id.s != NULL) {
shm_free(appearance->prev_dialog.id.s);
}
shm_free(appearance);
}
}
/*
* assumes slot for app_entries is locked.
*
* appearance-index values are 1-indexed.
* return values:
* -1: error
* >=1: index reserved for claimant
*/
static int sca_appearance_list_next_available_index_unsafe(
sca_appearance_list *app_list)
{
sca_appearance *app_cur;
int idx = 1;
assert(app_list != NULL);
for(app_cur = app_list->appearances; app_cur != NULL;
app_cur = app_cur->next, idx++) {
if(idx < app_cur->index) {
break;
}
}
return (idx);
}
static sca_appearance_list *sca_appearance_list_create(sca_mod *scam, str *aor)
{
sca_appearance_list *app_list;
int len;
len = sizeof(sca_appearance_list) + aor->len;
app_list = (sca_appearance_list *)shm_malloc(len);
if(app_list == NULL) {
LM_ERR("Failed to shm_malloc sca_appearance_list for %.*s\n",
STR_FMT(aor));
return (NULL);
}
memset(app_list, 0, sizeof(sca_appearance_list));
len = sizeof(sca_appearance_list);
app_list->aor.s = (char *)app_list + len;
SCA_STR_COPY(&app_list->aor, aor);
return (app_list);
}
sca_appearance_list *sca_appearance_list_for_line(sca_mod *scam, str *aor)
{
//sca_appearance_list
return (NULL);
}
void sca_appearance_list_insert_appearance(
sca_appearance_list *app_list, sca_appearance *app)
{
sca_appearance **cur;
assert(app_list != NULL);
assert(app != NULL);
app->appearance_list = app_list;
for(cur = &app_list->appearances; *cur != NULL; cur = &(*cur)->next) {
if(app->index < (*cur)->index) {
break;
}
}
app->next = *cur;
*cur = app;
}
sca_appearance *sca_appearance_list_unlink_index(
sca_appearance_list *app_list, int idx)
{
sca_appearance *app = NULL;
sca_appearance **cur;
assert(app_list != NULL);
assert(idx > 0);
for(cur = &app_list->appearances; *cur != NULL; cur = &(*cur)->next) {
if((*cur)->index == idx) {
app = *cur;
app->appearance_list = NULL;
*cur = (*cur)->next;
break;
}
}
if(app == NULL) {
LM_ERR("Tried to remove inactive %.*s appearance at index %d\n",
STR_FMT(&app_list->aor), idx);
}
return (app);
}
int sca_appearance_list_unlink_appearance(
sca_appearance_list *app_list, sca_appearance **app)
{
sca_appearance **cur;
int rc = 0;
assert(app_list != NULL);
assert(app != NULL && *app != NULL);
for(cur = &app_list->appearances; *cur != NULL; cur = &(*cur)->next) {
if(*cur == *app) {
*cur = (*cur)->next;
(*app)->appearance_list = NULL;
(*app)->next = NULL;
rc = 1;
break;
}
}
return (rc);
}
int sca_appearance_list_aor_cmp(str *aor, void *cmp_value)
{
sca_appearance_list *app_list = (sca_appearance_list *)cmp_value;
int cmp;
if((cmp = aor->len - app_list->aor.len) != 0) {
return (cmp);
}
return (memcmp(aor->s, app_list->aor.s, aor->len));
}
void sca_appearance_list_print(void *value)
{
sca_appearance_list *app_list = (sca_appearance_list *)value;
sca_appearance *app;
str state_str = STR_NULL;
LM_INFO("Appearance state for AoR %.*s:\n", STR_FMT(&app_list->aor));
for(app = app_list->appearances; app != NULL; app = app->next) {
sca_appearance_state_to_str(app->state, &state_str);
LM_INFO("index: %d, state: %.*s, uri: %.*s, owner: %.*s, "
"callee: %.*s, dialog: %.*s;%.*s;%.*s\n",
app->index, STR_FMT(&state_str), STR_FMT(&app->uri),
STR_FMT(&app->owner), STR_FMT(&app->callee),
STR_FMT(&app->dialog.call_id), STR_FMT(&app->dialog.from_tag),
STR_FMT(&app->dialog.to_tag));
}
}
void sca_appearance_list_free(void *value)
{
sca_appearance_list *app_list = (sca_appearance_list *)value;
sca_appearance *app, *app_tmp;
LM_DBG("Freeing appearance list for AoR %.*s\n", STR_FMT(&app_list->aor));
for(app = app_list->appearances; app != NULL; app = app_tmp) {
app_tmp = app->next;
shm_free(app);
}
shm_free(app_list);
}
int sca_appearance_register(sca_mod *scam, str *aor)
{
sca_appearance_list *app_list;
int rc = -1;
assert(scam != NULL);
assert(aor != NULL);
if(sca_uri_is_shared_appearance(scam, aor)) {
// we've already registered
rc = 0;
goto done;
}
app_list = sca_appearance_list_create(scam, aor);
if(app_list == NULL) {
goto done;
}
if(sca_hash_table_kv_insert(scam->appearances, aor, app_list,
sca_appearance_list_aor_cmp, sca_appearance_list_print,
sca_appearance_list_free)
< 0) {
LM_ERR("sca_appearance_register: failed to insert appearance list "
"for %.*s\n",
STR_FMT(aor));
goto done;
}
rc = 1;
done:
return (rc);
}
int sca_appearance_unregister(sca_mod *scam, str *aor)
{
int rc = 0;
assert(scam != NULL);
assert(aor != NULL);
if(sca_uri_is_shared_appearance(scam, aor)) {
if((rc = sca_hash_table_kv_delete(scam->appearances, aor)) == 0) {
rc = 1;
LM_INFO("unregistered SCA AoR %.*s\n", STR_FMT(aor));
}
}
return (rc);
}
sca_appearance *sca_appearance_seize_index_unsafe(sca_mod *scam, str *aor,
str *owner_uri, int app_idx, int slot_idx, int *seize_error)
{
sca_appearance_list *app_list;
sca_appearance *app = NULL;
sca_hash_slot *slot;
int error = SCA_APPEARANCE_ERR_UNKNOWN;
slot = sca_hash_table_slot_for_index(scam->appearances, slot_idx);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
if(app_list == NULL) {
LM_ERR("sca_appearance_seize_index_unsafe: no appearance list for "
"%.*s\n",
STR_FMT(aor));
goto done;
}
if(app_idx <= 0) {
app_idx = sca_appearance_list_next_available_index_unsafe(app_list);
}
for(app = app_list->appearances; app != NULL; app = app->next) {
if(app->index >= app_idx) {
break;
}
}
if(app != NULL && app->index == app_idx) {
// attempt to seize in-use appearance-index
error = SCA_APPEARANCE_ERR_INDEX_UNAVAILABLE;
app = NULL;
goto done;
}
app = sca_appearance_create(app_idx, owner_uri);
if(app == NULL) {
LM_ERR("Failed to create new appearance for %.*s at index %d\n",
STR_FMT(owner_uri), app_idx);
error = SCA_APPEARANCE_ERR_MALLOC;
goto done;
}
sca_appearance_update_state_unsafe(app, SCA_APPEARANCE_STATE_SEIZED);
sca_appearance_list_insert_appearance(app_list, app);
error = SCA_APPEARANCE_OK;
done:
if(seize_error) {
*seize_error = error;
}
return (app);
}
int sca_appearance_seize_index(sca_mod *scam, str *aor, int idx, str *owner_uri)
{
sca_appearance *app;
int slot_idx;
int app_idx = -1;
int error = SCA_APPEARANCE_OK;
slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
sca_hash_table_lock_index(scam->appearances, slot_idx);
app = sca_appearance_seize_index_unsafe(
scam, aor, owner_uri, idx, slot_idx, &error);
if(app != NULL) {
app_idx = app->index;
}
sca_hash_table_unlock_index(scam->appearances, slot_idx);
if(error == SCA_APPEARANCE_ERR_INDEX_UNAVAILABLE) {
app_idx = SCA_APPEARANCE_INDEX_UNAVAILABLE;
}
return (app_idx);
}
sca_appearance *sca_appearance_seize_next_available_unsafe(
sca_mod *scam, str *aor, str *owner_uri, int slot_idx)
{
sca_appearance_list *app_list;
sca_appearance *app = NULL;
sca_hash_slot *slot;
int idx = -1;
slot = sca_hash_table_slot_for_index(scam->appearances, slot_idx);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
if(app_list == NULL) {
app_list = sca_appearance_list_create(scam, aor);
if(app_list == NULL) {
goto done;
}
if(sca_hash_table_slot_kv_insert_unsafe(slot, app_list,
sca_appearance_list_aor_cmp, sca_appearance_list_print,
sca_appearance_list_free)
< 0) {
LM_ERR("Failed to insert appearance list for %.*s\n", STR_FMT(aor));
goto done;
}
}
// XXX this grows without bound. add modparam to set a hard limit
idx = sca_appearance_list_next_available_index_unsafe(app_list);
// XXX check idx > any configured max appearance index
app = sca_appearance_create(idx, owner_uri);
if(app == NULL) {
LM_ERR("Failed to create new appearance for %.*s at index %d\n",
STR_FMT(owner_uri), idx);
goto done;
}
sca_appearance_update_state_unsafe(app, SCA_APPEARANCE_STATE_SEIZED);
sca_appearance_list_insert_appearance(app_list, app);
done:
return (app);
}
int sca_appearance_seize_next_available_index(
sca_mod *scam, str *aor, str *owner_uri)
{
sca_appearance *app;
int slot_idx;
int idx = -1;
slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
sca_hash_table_lock_index(scam->appearances, slot_idx);
app = sca_appearance_seize_next_available_unsafe(
scam, aor, owner_uri, slot_idx);
if(app != NULL) {
idx = app->index;
}
sca_hash_table_unlock_index(scam->appearances, slot_idx);
return (idx);
}
void sca_appearance_update_state_unsafe(sca_appearance *app, int state)
{
assert(app != NULL);
app->state = state;
app->times.mtime = time(NULL);
}
int sca_appearance_update_owner_unsafe(sca_appearance *app, str *owner)
{
assert(app != NULL);
assert(owner != NULL);
if(!SCA_STR_EMPTY(&app->owner)) {
if(app->prev_owner.s != NULL) {
shm_free(app->prev_owner.s);
}
app->prev_owner.s = app->owner.s;
app->prev_owner.len = app->owner.len;
}
app->owner.s = (char *)shm_malloc(owner->len);
if(app->owner.s == NULL) {
LM_ERR("sca_appearance_update_owner_unsafe: shm_malloc for new "
"owner %.*s failed: out of memory\n",
STR_FMT(owner));
goto error;
}
SCA_STR_COPY(&app->owner, owner);
return (1);
error:
// restore owner
app->owner.s = app->prev_owner.s;
app->owner.len = app->prev_owner.len;
memset(&app->prev_owner, 0, sizeof(str));
return (-1);
}
int sca_appearance_update_callee_unsafe(sca_appearance *app, str *callee)
{
assert(app != NULL);
assert(callee != NULL);
if(!SCA_STR_EMPTY(&app->callee)) {
if(app->prev_callee.s != NULL) {
shm_free(app->prev_callee.s);
}
app->prev_callee.s = app->callee.s;
app->prev_callee.len = app->callee.len;
}
app->callee.s = (char *)shm_malloc(callee->len);
if(app->callee.s == NULL) {
LM_ERR("sca_appearance_update_owner_unsafe: shm_malloc for new "
"callee %.*s failed: out of memory\n",
STR_FMT(callee));
goto error;
}
SCA_STR_COPY(&app->callee, callee);
return (1);
error:
// restore callee
app->callee.s = app->prev_callee.s;
app->callee.len = app->prev_callee.len;
memset(&app->prev_callee, 0, sizeof(str));
return (-1);
}
int sca_appearance_update_dialog_unsafe(
sca_appearance *app, str *call_id, str *from_tag, str *to_tag)
{
int len;
assert(app != NULL);
assert(call_id != NULL);
assert(from_tag != NULL);
if(!SCA_STR_EMPTY(&app->dialog.id)) {
if(app->prev_dialog.id.s != NULL) {
shm_free(app->prev_dialog.id.s);
}
app->prev_dialog.id.s = app->dialog.id.s;
app->prev_dialog.id.len = app->dialog.id.len;
app->prev_dialog.call_id.s = app->dialog.call_id.s;
app->prev_dialog.call_id.len = app->dialog.call_id.len;
app->prev_dialog.from_tag.s = app->dialog.from_tag.s;
app->prev_dialog.from_tag.len = app->dialog.from_tag.len;
app->prev_dialog.to_tag.s = app->dialog.to_tag.s;
app->prev_dialog.to_tag.len = app->dialog.to_tag.len;
}
len = call_id->len + from_tag->len;
if(!SCA_STR_EMPTY(to_tag)) {
len += to_tag->len;
}
app->dialog.id.s = (char *)shm_malloc(len);
if(app->dialog.id.s == NULL) {
LM_ERR("sca_appearance_update_dialog_unsafe: shm_malloc new dialog "
"failed: out of memory\n");
goto error;
}
SCA_STR_COPY(&app->dialog.id, call_id);
SCA_STR_APPEND(&app->dialog.id, from_tag);
app->dialog.call_id.s = app->dialog.id.s;
app->dialog.call_id.len = call_id->len;
app->dialog.from_tag.s = app->dialog.id.s + call_id->len;
app->dialog.from_tag.len = from_tag->len;
app->dialog.to_tag.s = app->dialog.id.s + call_id->len + from_tag->len;
app->dialog.to_tag.len = to_tag->len;
return (1);
error:
// restore dialog
app->prev_dialog.id.s = app->dialog.id.s;
app->prev_dialog.id.len = app->dialog.id.len;
app->prev_dialog.call_id.s = app->dialog.call_id.s;
app->prev_dialog.call_id.len = app->dialog.call_id.len;
app->prev_dialog.from_tag.s = app->dialog.from_tag.s;
app->prev_dialog.from_tag.len = app->dialog.from_tag.len;
app->prev_dialog.to_tag.s = app->dialog.to_tag.s;
app->prev_dialog.to_tag.len = app->dialog.to_tag.len;
memset(&app->prev_dialog, 0, sizeof(sca_dialog));
return (-1);
}
int sca_appearance_update_unsafe(sca_appearance *app, int state, str *display,
str *uri, sca_dialog *dialog, str *owner, str *callee)
{
int rc = SCA_APPEARANCE_OK;
int len;
if(state != SCA_APPEARANCE_STATE_UNKNOWN) {
sca_appearance_update_state_unsafe(app, state);
}
if(!SCA_STR_EMPTY(uri)) {
if(!SCA_STR_EMPTY(&app->uri)) {
// the uri str's s member is shm_malloc'd separately
shm_free(app->uri.s);
memset(&app->uri, 0, sizeof(str));
}
// +2 for left & right carets surrounding URI
len = uri->len + 2;
if(!SCA_STR_EMPTY(display)) {
// cheaper to scan string than shm_malloc 2x display?
len += sca_uri_display_escapes_count(display);
// +1 for space between display & uri
len += display->len + 1;
}
app->uri.s = (char *)shm_malloc(len);
if(app->uri.s == NULL) {
LM_ERR("shm_malloc %d bytes returned NULL\n", uri->len);
rc = SCA_APPEARANCE_ERR_MALLOC;
goto done;
}
if(!SCA_STR_EMPTY(display)) {
// copy escaped display information...
app->uri.len = escape_common(app->uri.s, display->s, display->len);
// ... and add a space between it and the uri
*(app->uri.s + app->uri.len) = ' ';
app->uri.len++;
}
*(app->uri.s + app->uri.len) = '<';
app->uri.len++;
SCA_STR_APPEND(&app->uri, uri);
*(app->uri.s + app->uri.len) = '>';
app->uri.len++;
}
if(!SCA_DIALOG_EMPTY(dialog)) {
if(!SCA_STR_EQ(&dialog->id, &app->dialog.id)) {
if(app->dialog.id.s != NULL) {
shm_free(app->dialog.id.s);
}
app->dialog.id.s = (char *)shm_malloc(dialog->id.len);
if(app->dialog.id.s == NULL) {
LM_ERR("sca_appearance_update_unsafe: shm_malloc dialog id "
"failed: out of shared memory\n");
// XXX this seems bad enough to abort...
return (-1);
}
SCA_STR_COPY(&app->dialog.id, &dialog->id);
app->dialog.call_id.s = app->dialog.id.s;
app->dialog.call_id.len = dialog->call_id.len;
app->dialog.from_tag.s = app->dialog.id.s + dialog->call_id.len;
app->dialog.from_tag.len = dialog->from_tag.len;
if(!SCA_STR_EMPTY(&dialog->to_tag)) {
app->dialog.to_tag.s = app->dialog.id.s + dialog->call_id.len
+ dialog->from_tag.len;
app->dialog.to_tag.len = dialog->to_tag.len;
} else {
app->dialog.to_tag.s = NULL;
app->dialog.to_tag.len = 0;
}
}
}
// NOTE these two blocks could be condensed and inlined
if(!SCA_STR_EMPTY(owner)) {
if(!SCA_STR_EQ(&app->owner, owner)) {
if(app->owner.s != NULL) {
shm_free(app->owner.s);
}
app->owner.s = (char *)shm_malloc(owner->len);
if(app->owner.s == NULL) {
LM_ERR("sca_appearance_update_unsafe: shm_malloc "
"appearance owner URI failed: out of shared memory\n");
return (-1);
}
SCA_STR_COPY(&app->owner, owner);
}
}
if(!SCA_STR_EMPTY(callee)) {
if(!SCA_STR_EQ(&app->callee, callee)) {
if(app->callee.s != NULL) {
shm_free(app->callee.s);
}
app->callee.s = (char *)shm_malloc(callee->len);
if(app->callee.s == NULL) {
LM_ERR("sca_appearance_update_unsafe: shm_malloc "
"appearance callee URI failed: out of shared memory\n");
return (-1);
}
SCA_STR_COPY(&app->callee, callee);
}
}
done:
return (rc);
}
int sca_uri_is_shared_appearance(sca_mod *scam, str *aor)
{
sca_hash_slot *slot;
sca_appearance_list *app_list;
int slot_idx;
slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
slot = sca_hash_table_slot_for_index(scam->appearances, slot_idx);
sca_hash_table_lock_index(scam->appearances, slot_idx);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
sca_hash_table_unlock_index(scam->appearances, slot_idx);
if(app_list == NULL) {
return (0);
}
return (1);
}
int sca_uri_lock_shared_appearance(sca_mod *scam, str *aor)
{
sca_hash_slot *slot;
sca_appearance_list *app_list;
int slot_idx;
if(SCA_STR_EMPTY(aor)) {
return (-1);
}
slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
slot = sca_hash_table_slot_for_index(scam->appearances, slot_idx);
sca_hash_table_lock_index(scam->appearances, slot_idx);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
if(app_list == NULL) {
sca_hash_table_unlock_index(scam->appearances, slot_idx);
slot_idx = -1;
}
return (slot_idx);
}
int sca_uri_lock_if_shared_appearance(sca_mod *scam, str *aor, int *slot_idx)
{
sca_hash_slot *slot;
sca_appearance_list *app_list;
assert(slot_idx != NULL);
if(SCA_STR_EMPTY(aor)) {
*slot_idx = -1;
return (0);
}
*slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
slot = sca_hash_table_slot_for_index(scam->appearances, *slot_idx);
sca_hash_table_lock_index(scam->appearances, *slot_idx);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
if(app_list == NULL) {
sca_hash_table_unlock_index(scam->appearances, *slot_idx);
*slot_idx = -1;
return (0);
}
return (1);
}
int sca_appearance_state_for_index(sca_mod *scam, str *aor, int idx)
{
sca_hash_slot *slot;
sca_appearance_list *app_list;
sca_appearance *app;
int slot_idx;
int state = SCA_APPEARANCE_STATE_UNKNOWN;
slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
slot = sca_hash_table_slot_for_index(scam->appearances, slot_idx);
sca_hash_table_lock_index(scam->appearances, slot_idx);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
if(app_list == NULL) {
LM_DBG("%.*s has no in-use appearances\n", STR_FMT(aor));
goto done;
}
for(app = app_list->appearances; app != NULL; app = app->next) {
if(app->index == idx) {
break;
}
}
if(app == NULL) {
LM_WARN("%.*s appearance-index %d is not in use\n", STR_FMT(aor), idx);
goto done;
}
state = app->state;
done:
sca_hash_table_unlock_index(scam->appearances, slot_idx);
return (state);
}
int sca_appearance_update_index(sca_mod *scam, str *aor, int idx, int state,
str *display, str *uri, sca_dialog *dialog)
{
sca_hash_slot *slot;
sca_appearance_list *app_list;
sca_appearance *app;
str state_str = STR_NULL;
int len;
int slot_idx;
int rc = SCA_APPEARANCE_ERR_UNKNOWN;
slot_idx = sca_hash_table_index_for_key(scam->appearances, aor);
slot = sca_hash_table_slot_for_index(scam->appearances, slot_idx);
sca_hash_table_lock_index(scam->appearances, slot_idx);
sca_appearance_state_to_str(state, &state_str);
app_list = sca_hash_table_slot_kv_find_unsafe(slot, aor);
if(app_list == NULL) {
LM_WARN("Cannot update %.*s index %d to state %.*s: %.*s has no "
"in-use appearances\n",
STR_FMT(aor), idx, STR_FMT(&state_str), STR_FMT(aor));
rc = SCA_APPEARANCE_ERR_NOT_IN_USE;
goto done;
}
for(app = app_list->appearances; app != NULL; app = app->next) {
if(app->index == idx) {
break;
} else if(idx == 0) {
if(SCA_STR_EQ(&dialog->id, &app->dialog.id)) {
break;
}
}
}
if(app == NULL) {
LM_WARN("Cannot update %.*s index %d to %.*s: index %d not in use\n",
STR_FMT(aor), idx, STR_FMT(&state_str), idx);
rc = SCA_APPEARANCE_ERR_INDEX_INVALID;
goto done;
}
if(state != SCA_APPEARANCE_STATE_UNKNOWN && app->state != state) {
sca_appearance_update_state_unsafe(app, state);
}
if(!SCA_STR_EMPTY(uri)) {
if(!SCA_STR_EMPTY(&app->uri)) {
// the uri str's s member is shm_malloc'd separately
shm_free(app->uri.s);
memset(&app->uri, 0, sizeof(str));
}
// +2 for left & right carets surrounding URI
len = uri->len + 2;
if(!SCA_STR_EMPTY(display)) {
// cheaper to scan string than shm_malloc 2x display?
len += sca_uri_display_escapes_count(display);
// +1 for space between display & uri
len += display->len + 1;
}
app->uri.s = (char *)shm_malloc(len);
if(app->uri.s == NULL) {
LM_ERR("Failed to update %.*s index %d uri to %.*s: "
"shm_malloc %d bytes returned NULL\n",
STR_FMT(aor), idx, STR_FMT(uri), uri->len);
rc = SCA_APPEARANCE_ERR_MALLOC;
goto done;
}
if(!SCA_STR_EMPTY(display)) {
// copy escaped display information...
app->uri.len = escape_common(app->uri.s, display->s, display->len);
// ... and add a space between it and the uri
*(app->uri.s + app->uri.len) = ' ';
app->uri.len++;
}
*(app->uri.s + app->uri.len) = '<';
app->uri.len++;
SCA_STR_APPEND(&app->uri, uri);
*(app->uri.s + app->uri.len) = '>';
app->uri.len++;
}
if(!SCA_DIALOG_EMPTY(dialog)) {
if(!SCA_STR_EQ(&dialog->id, &app->dialog.id)) {
if(app->dialog.id.s != NULL) {
shm_free(app->dialog.id.s);
}
app->dialog.id.s = (char *)shm_malloc(dialog->id.len);
SCA_STR_COPY(&app->dialog.id, &dialog->id);
app->dialog.call_id.s = app->dialog.id.s;
app->dialog.call_id.len = dialog->call_id.len;
app->dialog.from_tag.s = app->dialog.id.s + dialog->call_id.len;
app->dialog.from_tag.len = dialog->from_tag.len;
if(!SCA_STR_EMPTY(&dialog->to_tag)) {
app->dialog.to_tag.s = app->dialog.id.s + dialog->call_id.len
+ dialog->from_tag.len;
app->dialog.to_tag.len = dialog->to_tag.len;
} else {
app->dialog.to_tag.s = NULL;
app->dialog.to_tag.len = 0;
}
}