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dlg_replication.c
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dlg_replication.c
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/*
* Copyright (C) 2013-2020 OpenSIPS Solutions
*
* This file is part of opensips, a free SIP server.
*
* opensips 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
*
* opensips 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 "dlg_hash.h"
#include "dlg_db_handler.h"
#include "dlg_profile.h"
#include "dlg_replication.h"
#include "dlg_repl_profile.h"
#include "../../resolve.h"
#include "../../forward.h"
#include "../../pt.h"
extern int active_dlgs_cnt;
extern int early_dlgs_cnt;
extern stat_var *processed_dlgs;
extern stat_var *create_sent;
extern stat_var *update_sent;
extern stat_var *delete_sent;
extern stat_var *create_recv;
extern stat_var *update_recv;
extern stat_var *delete_recv;
struct clusterer_binds clusterer_api;
str shtag_dlg_val = str_init("dlgX_shtag");
char *dlg_sync_in_progress;
static int get_shtag_sync_status(struct dlg_cell *dlg);
static struct socket_info * fetch_socket_info(str *addr)
{
struct socket_info *sock;
int port, proto;
str host;
if (!addr->s || addr->s[0] == 0)
return NULL;
if (parse_phostport(addr->s, addr->len, &host.s, &host.len,
&port, &proto) != 0) {
LM_ERR("bad socket <%.*s>\n", addr->len, addr->s);
return NULL;
}
sock = grep_internal_sock_info(&host, (unsigned short) port,
(unsigned short) proto);
if (!sock) {
LM_WARN("non-local socket <%.*s>...ignoring\n", addr->len, addr->s);
}
return sock;
}
#define DLG_BIN_POP(_type, _p, _field, _label) \
do { \
if (bin_pop_ ## _type(_p, (str *)&_field) != 0) { \
LM_WARN("cannot find %s field in bin packet!\n", #_field); \
goto _label; \
} \
} while (0)
#define DLG_BIN_POP_ROUTE(_packet, _dlg, _type, _pre_linking_error) \
do { \
str __s; \
DLG_BIN_POP(str, _packet, __s, _pre_linking_error);\
if (__s.len) {\
_dlg->rt_ ## _type = get_script_route_ID_by_name_str( &__s, \
sroutes->request, RT_NO); \
if (_dlg->rt_ ## _type==-1) { \
LM_WARN("replicated <%.*s> ## _type route not found " \
"in the script\n", __s.len, __s.s); \
_dlg->rt_ ## _type = 0; \
} \
} else \
_dlg->rt_ ## _type = 0; \
} while(0)
static struct dlg_cell *lookup_dlg_unsafe(unsigned int h_entry, unsigned int h_id)
{
struct dlg_cell *dlg;
struct dlg_entry *d_entry;
if (h_entry>=d_table->size)
goto not_found;
d_entry = &(d_table->entries[h_entry]);
for( dlg=d_entry->first ; dlg ; dlg=dlg->next ) {
if (dlg->h_id == h_id) {
if (dlg->state==DLG_STATE_DELETED)
goto not_found;
LM_DBG("dialog id=%u found on entry %u\n", h_id, h_entry);
return dlg;
}
}
not_found:
LM_DBG("no dialog id=%u found on entry %u\n", h_id, h_entry);
return 0;
}
int dlg_init_clustering(void)
{
/* check params and register to clusterer for dialogs and
* profiles replication */
if (dialog_repl_cluster < 0) {
LM_ERR("Invalid dialog_replication_cluster, must be 0 or "
"a positive cluster id\n");
return -1;
}
if (profile_repl_cluster < 0) {
LM_ERR("Invalid profile_repl_cluster, must be 0 or "
"a positive cluster id\n");
return -1;
}
if ((dialog_repl_cluster || profile_repl_cluster) &&
(load_clusterer_api(&clusterer_api) < 0)) {
LM_DBG("failed to load clusterer API - is clusterer module loaded?\n");
return -1;
}
if (profile_repl_cluster && clusterer_api.register_capability(
&prof_repl_cap, receive_prof_repl, NULL, profile_repl_cluster, 0,
NODE_CMP_ANY) < 0) {
LM_ERR("Cannot register clusterer callback for profile replication!\n");
return -1;
}
if (dialog_repl_cluster) {
if (clusterer_api.register_capability(&dlg_repl_cap, receive_dlg_repl,
rcv_cluster_event, dialog_repl_cluster, 1, NODE_CMP_ANY) < 0) {
LM_ERR("Cannot register clusterer callback for dialog replication!\n");
return -1;
}
dlg_sync_in_progress = shm_malloc(sizeof *dlg_sync_in_progress);
if (!dlg_sync_in_progress) {
LM_ERR("no more shm memory!\n");
return -1;
}
*dlg_sync_in_progress = 1;
if (clusterer_api.request_sync(&dlg_repl_cap, dialog_repl_cluster, 0) < 0)
LM_ERR("Sync request failed\n");
}
return 0;
}
/* Binary Packet receiving functions */
/**
* replicates a confirmed dialog from another OpenSIPS instance
* by reading the relevant information using the Binary Packet Interface
*/
int dlg_replicated_create(bin_packet_t *packet, struct dlg_cell *cell,
str *ftag, str *ttag, unsigned int hid, int safe, int from_sync)
{
int h_entry, rc;
str callid = { NULL, 0 }, from_uri, to_uri, from_tag, to_tag;
str cseq1, cseq2, contact1, contact2, adv_ct1, adv_ct2;
str rroute1, rroute2, mangled_fu, mangled_tu;
str sdp1, sdp2, sdp3, sdp4;
str sock, vars, profiles;
struct dlg_cell *dlg = NULL;
struct socket_info *caller_sock, *callee_sock;
struct dlg_entry *d_entry;
str tag_name;
unsigned int h_id;
unsigned int state;
unsigned int start_ts;
short pkg_ver = get_bin_pkg_version(packet);
LM_DBG("Received replicated dialog!\n");
if (!cell) {
DLG_BIN_POP(str, packet, callid, malformed);
DLG_BIN_POP(str, packet, from_tag, malformed);
DLG_BIN_POP(str, packet, to_tag, malformed);
DLG_BIN_POP(str, packet, from_uri, malformed);
DLG_BIN_POP(str, packet, to_uri, malformed);
DLG_BIN_POP(int, packet, h_id, malformed);
}
DLG_BIN_POP(int, packet, start_ts, malformed);
DLG_BIN_POP(int, packet, state, malformed);
if (!cell) {
h_entry = dlg_hash(&callid);
d_entry = &d_table->entries[h_entry];
if (!safe)
dlg_lock(d_table, d_entry);
if (pkg_ver == DLG_BIN_V4)
dlg = lookup_dlg_unsafe(h_entry, h_id);
else
get_dlg_unsafe(d_entry, &callid, &from_tag, &to_tag, &dlg);
if (dlg) {
LM_DBG("Dialog with ci '%.*s' is already created\n",
callid.len, callid.s);
/* unmark dlg as loaded from DB (otherwise it would have been
* dropped later when syncing from cluster is done) */
dlg->flags &= ~DLG_FLAG_FROM_DB;
if (from_sync || *dlg_sync_in_progress)
dlg->flags |= DLG_FLAG_SYNCED;
dlg_unlock(d_table, d_entry);
return 0;
}
dlg = build_new_dlg(&callid, &from_uri, &to_uri, &from_tag);
if (!dlg) {
LM_ERR("Failed to create replicated dialog!\n");
goto pre_linking_error;
}
} else {
h_entry = dlg_hash(&cell->callid);
d_entry = &d_table->entries[h_entry];
if (!safe)
dlg_lock(d_table, d_entry);
from_tag = *ftag;
to_tag = *ttag;
h_id = hid;
dlg = cell;
}
if_update_stat(dlg_enable_stats, processed_dlgs, 1);
dlg->h_id = h_id;
dlg->start_ts = start_ts;
dlg->state = state;
/* next_id follows the max value of all replicated ids */
if (d_table->entries[dlg->h_entry].next_id <= dlg->h_id)
d_table->entries[dlg->h_entry].next_id = dlg->h_id + 1;
DLG_BIN_POP(str, packet, sock, pre_linking_error);
caller_sock = fetch_socket_info(&sock);
if (!caller_sock) {
LM_ERR("Replicated dialog doesn't match caller's listening socket %.*s\n",
sock.len, sock.s);
goto pre_linking_error;
}
DLG_BIN_POP(str, packet, sock, pre_linking_error);
callee_sock = fetch_socket_info(&sock);
if (!callee_sock) {
LM_ERR("Replicated dialog doesn't match callee's listening socket %.*s\n",
sock.len, sock.s);
goto pre_linking_error;
}
DLG_BIN_POP(str, packet, cseq1, pre_linking_error);
DLG_BIN_POP(str, packet, cseq2, pre_linking_error);
DLG_BIN_POP(str, packet, rroute1, pre_linking_error);
DLG_BIN_POP(str, packet, rroute2, pre_linking_error);
DLG_BIN_POP(str, packet, contact1, pre_linking_error);
DLG_BIN_POP(str, packet, contact2, pre_linking_error);
DLG_BIN_POP(str, packet, mangled_fu, pre_linking_error);
DLG_BIN_POP(str, packet, mangled_tu, pre_linking_error);
DLG_BIN_POP(str, packet, sdp1, pre_linking_error);
DLG_BIN_POP(str, packet, sdp2, pre_linking_error);
DLG_BIN_POP(str, packet, sdp3, pre_linking_error);
DLG_BIN_POP(str, packet, sdp4, pre_linking_error);
DLG_BIN_POP(str, packet, adv_ct1, pre_linking_error);
DLG_BIN_POP(str, packet, adv_ct2, pre_linking_error);
/* add the 2 legs */
if (dlg_update_leg_info(0, dlg, &from_tag, &rroute1, &contact1, &adv_ct1,
&cseq1, caller_sock, 0, 0, &sdp1, &sdp2) != 0 ||
dlg_update_leg_info(1, dlg, &to_tag, &rroute2, &contact2, &adv_ct2,
&cseq2, callee_sock, &mangled_fu, &mangled_tu, &sdp3, &sdp4) != 0) {
LM_ERR("dlg_set_leg_info failed\n");
goto pre_linking_error;
}
dlg->legs_no[DLG_LEG_200OK] = DLG_FIRST_CALLEE_LEG;
/* link the dialog into the hash */
_link_dlg_unsafe(d_entry, dlg);
DLG_BIN_POP(str, packet, vars, pre_linking_error);
DLG_BIN_POP(str, packet, profiles, pre_linking_error);
DLG_BIN_POP(int, packet, dlg->user_flags, pre_linking_error);
DLG_BIN_POP(int, packet, dlg->mod_flags, pre_linking_error);
DLG_BIN_POP(int, packet, dlg->flags, pre_linking_error);
/* also save the dialog into the DB on this instance */
dlg->flags |= DLG_FLAG_NEW;
DLG_BIN_POP(int, packet, dlg->tl.timeout, pre_linking_error);
DLG_BIN_POP(int, packet, dlg->legs[DLG_CALLER_LEG].last_gen_cseq,
pre_linking_error);
DLG_BIN_POP(int, packet, dlg->legs[callee_idx(dlg)].last_gen_cseq,
pre_linking_error);
DLG_BIN_POP_ROUTE( packet, dlg, on_answer, pre_linking_error);
DLG_BIN_POP_ROUTE( packet, dlg, on_timeout, pre_linking_error);
DLG_BIN_POP_ROUTE( packet, dlg, on_hangup, pre_linking_error);
if (dlg->tl.timeout <= (unsigned int) time(0))
dlg->tl.timeout = 0;
else
dlg->tl.timeout -= (unsigned int) time(0);
/* restore the timer values */
if (insert_dlg_timer(&dlg->tl, (int) dlg->tl.timeout) != 0) {
LM_CRIT("Unable to insert dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
goto error;
}
/* timer list + this ref */
ref_dlg_unsafe(dlg, 2);
LM_DBG("Received initial timeout of %d for dialog %.*s, safe = %d\n",
dlg->tl.timeout, callid.len, callid.s, safe);
dlg->lifetime = 0;
if (vars.s && vars.len != 0) {
read_dialog_vars(vars.s, vars.len, dlg);
run_dlg_callbacks(DLGCB_PROCESS_VARS, dlg,
NULL, DLG_DIR_NONE, NULL, 1, 0);
}
dlg->locked_by = process_no;
if ((rc = fetch_dlg_value(dlg, &shtag_dlg_val, &tag_name, 0)) == 0) {
if (shm_str_dup(&dlg->shtag, &tag_name) < 0)
LM_ERR("No more shm memory\n");
} else if (rc == -1)
LM_ERR("Failed to get dlg value for sharing tag\n");
dlg->locked_by = 0;
if (from_sync) {
dlg->flags |= DLG_FLAG_SYNCED;
/* drop a dialog that is not marked with a sharing tag we're
* interested in */
if (get_shtag_sync_status(dlg) != SHTAG_SYNC_REQUIRED) {
dlg_unlock(d_table, d_entry);
unref_dlg(dlg, 3);
return 0;
}
} else if (*dlg_sync_in_progress) {
/* dialogs received after sync started and until SYNC_DONE callback
* is run should never be dropped as if they were "local" dialogs */
dlg->flags |= DLG_FLAG_SYNCED;
}
if (dlg_db_mode == DB_MODE_DELAYED) {
/* to be later removed by timer */
ref_dlg_unsafe(dlg, 1);
}
/* avoid AB/BA deadlock with pinging routines */
dlg_unlock(d_table, d_entry);
if (dlg->flags & DLG_FLAG_PING_CALLER || dlg->flags & DLG_FLAG_PING_CALLEE) {
if (insert_ping_timer(dlg) != 0)
LM_CRIT("Unable to insert dlg %p into ping timer\n",dlg);
else {
ref_dlg(dlg, 1);
}
}
if (dlg_has_reinvite_pinging(dlg)) {
if (insert_reinvite_ping_timer(dlg) != 0) {
LM_CRIT("Unable to insert dlg %p into reinvite ping timer\n",dlg);
} else {
ref_dlg(dlg, 1);
}
}
if (profiles.s && profiles.len != 0)
read_dialog_profiles(profiles.s, profiles.len, dlg, 0, 1);
if_update_stat(dlg_enable_stats, active_dlgs, 1);
run_load_callback_per_dlg(dlg);
unref_dlg(dlg, 1);
return 0;
pre_linking_error:
dlg_unlock(d_table, d_entry);
if (dlg)
destroy_dlg(dlg);
return -1;
error:
dlg_unlock(d_table, d_entry);
if (dlg)
unref_dlg(dlg, 1);
malformed:
return -1;
}
/**
* replicates the remote update of an ongoing dialog locally
* by reading the relevant information using the Binary Packet Interface
*/
int dlg_replicated_update(bin_packet_t *packet)
{
struct dlg_cell *dlg = NULL;
str call_id, from_tag, to_tag, from_uri, to_uri, vars, profiles;
int timeout, h_entry;
str st;
struct dlg_entry *d_entry;
int rcv_flags, save_new_flag, save_sync_flag;
unsigned int h_id;
short pkg_ver = get_bin_pkg_version(packet);
bin_pop_str(packet, &call_id);
bin_pop_str(packet, &from_tag);
bin_pop_str(packet, &to_tag);
bin_pop_str(packet, &from_uri);
bin_pop_str(packet, &to_uri);
bin_pop_int(packet, &h_id);
LM_DBG("replicated update for ['%.*s' '%.*s' '%.*s' '%.*s' '%.*s']\n",
call_id.len, call_id.s, from_tag.len, from_tag.s, to_tag.len, to_tag.s,
from_uri.len, from_uri.s, to_uri.len, to_uri.s);
h_entry = dlg_hash(&call_id);
d_entry = &d_table->entries[h_entry];
dlg_lock(d_table, d_entry);
if (pkg_ver == DLG_BIN_V4)
dlg = lookup_dlg_unsafe(h_entry, h_id);
else
get_dlg_unsafe(d_entry, &call_id, &from_tag, &to_tag, &dlg);
if (!dlg) {
LM_DBG("dialog not found, building new\n");
dlg = build_new_dlg(&call_id, &from_uri, &to_uri, &from_tag);
if (!dlg) {
LM_ERR("Failed to create replicated dialog!\n");
goto error;
}
return dlg_replicated_create(packet ,dlg, &from_tag, &to_tag, h_id, 1, 0);
}
/* discard an update for a deleted dialog */
if (dlg->state == DLG_STATE_DELETED) {
dlg_unlock(d_table, d_entry);
return 0;
}
bin_skip_int(packet, 1);
bin_pop_int(packet, &dlg->state);
/* sockets */
bin_skip_str(packet, 2);
bin_pop_str(packet, &st);
if (dlg_update_cseq(dlg, DLG_CALLER_LEG, &st, 0) != 0) {
LM_ERR("failed to update caller cseq\n");
goto error;
}
bin_pop_str(packet, &st);
if (dlg_update_cseq(dlg, callee_idx(dlg), &st, 0) != 0) {
LM_ERR("failed to update callee cseq\n");
goto error;
}
/* route set */
bin_skip_str(packet, 2);
/* sync caller and callee contact */
bin_pop_str(packet, &st);
shm_str_sync(&dlg->legs[DLG_CALLER_LEG].contact, &st);
bin_pop_str(packet, &st);
shm_str_sync(&dlg->legs[callee_idx(dlg)].contact, &st);
/* from & to URIs set */
bin_skip_str(packet, 2);
/* sync SDPs */
bin_pop_str(packet, &st);
shm_str_sync(&dlg->legs[DLG_CALLER_LEG].in_sdp, &st);
bin_pop_str(packet, &st);
shm_str_sync(&dlg->legs[DLG_CALLER_LEG].out_sdp, &st);
bin_pop_str(packet, &st);
shm_str_sync(&dlg->legs[callee_idx(dlg)].in_sdp, &st);
bin_pop_str(packet, &st);
shm_str_sync(&dlg->legs[callee_idx(dlg)].out_sdp, &st);
/*
* advertised caller and callee contacts
* we shall skip these, as we're currently not re-learning sockets either,
* so we can't figure out the advertised contact to be used by this
* instance, in case it is different than the other one
*/
bin_skip_str(packet, 2);
bin_pop_str(packet, &vars);
bin_pop_str(packet, &profiles);
bin_pop_int(packet, &dlg->user_flags);
bin_pop_int(packet, &dlg->mod_flags);
bin_pop_int(packet, &rcv_flags);
/* make sure an update received immediately after a create can't
* incorrectly erase the DLG_FLAG_NEW before locally writing to DB */
save_new_flag = dlg->flags & DLG_FLAG_NEW;
save_sync_flag = dlg->flags & DLG_FLAG_SYNCED;
dlg->flags = rcv_flags;
dlg->flags |= ((save_new_flag ? DLG_FLAG_NEW : 0) |
(save_sync_flag ? DLG_FLAG_SYNCED : 0) | DLG_FLAG_CHANGED);
bin_pop_int(packet, &timeout);
bin_skip_int(packet, 2);
DLG_BIN_POP_ROUTE( packet, dlg, on_answer, error);
DLG_BIN_POP_ROUTE( packet, dlg, on_timeout, error);
DLG_BIN_POP_ROUTE( packet, dlg, on_hangup, error);
timeout -= time(0);
LM_DBG("Received updated timeout of %d for dialog %.*s\n",
timeout, call_id.len, call_id.s);
if (dlg->lifetime != timeout) {
dlg->lifetime = timeout;
switch (update_dlg_timer(&dlg->tl, dlg->lifetime) ) {
case -1:
LM_ERR("failed to update dialog lifetime!\n");
/* continue */
case 0:
/* timeout value was updated */
break;
case 1:
/* dlg inserted in timer list with new expire (reference it)*/
ref_dlg_unsafe(dlg,1);
}
}
if (vars.s && vars.len != 0) {
read_dialog_vars(vars.s, vars.len, dlg);
run_dlg_callbacks(DLGCB_PROCESS_VARS, dlg,
NULL, DLG_DIR_NONE, NULL, 1, 0);
}
dlg->flags |= DLG_FLAG_VP_CHANGED;
ref_dlg_unsafe(dlg, 1);
dlg_unlock(d_table, d_entry);
if (profiles.s && profiles.len != 0)
read_dialog_profiles(profiles.s, profiles.len, dlg, 1, 1);
unref_dlg(dlg, 1);
return 0;
error:
dlg_unlock(d_table, d_entry);
return -1;
}
/**
* replicates the remote deletion of a dialog locally
* by reading the relevant information using the Binary Packet Interface
*/
int dlg_replicated_delete(bin_packet_t *packet)
{
str call_id, from_tag, to_tag;
unsigned int dir, dst_leg;
struct dlg_cell *dlg;
int old_state, new_state, unref, ret;
unsigned int h_id;
int h_entry;
short pkg_ver = get_bin_pkg_version(packet);
DLG_BIN_POP(str, packet, call_id, malformed);
DLG_BIN_POP(str, packet, from_tag, malformed);
DLG_BIN_POP(str, packet, to_tag, malformed);
LM_DBG("Deleting dialog with callid: %.*s\n", call_id.len, call_id.s);
if (pkg_ver == DLG_BIN_V4) {
DLG_BIN_POP(int, packet, h_id, malformed);
h_entry = dlg_hash(&call_id);
dlg = lookup_dlg(h_entry, h_id);
} else {
dlg = get_dlg(&call_id, &from_tag, &to_tag, &dir, &dst_leg);
}
if (!dlg) {
/* may be already deleted due to timeout */
LM_DBG("dialog not found (callid: |%.*s| ftag: |%.*s|\n",
call_id.len, call_id.s, from_tag.len, from_tag.s);
return 0;
}
destroy_linkers(dlg);
remove_dlg_prof_table(dlg, 0);
/* simulate BYE received from caller */
next_state_dlg(dlg, DLG_EVENT_REQBYE, DLG_DIR_DOWNSTREAM, &old_state,
&new_state, &unref, dlg->legs_no[DLG_LEG_200OK], 0);
if (old_state == new_state) {
LM_ERR("duplicate dialog delete request (callid: |%.*s|"
"ftag: |%.*s|\n", call_id.len, call_id.s, from_tag.len, from_tag.s);
return -1;
}
ret = remove_dlg_timer(&dlg->tl);
if (ret < 0) {
LM_CRIT("unable to unlink the timer on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
} else if (ret > 0) {
LM_DBG("dlg expired (not in timer list) on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->legs[DLG_CALLER_LEG].tag.len,
dlg->legs[DLG_CALLER_LEG].tag.s,
dlg->legs[callee_idx(dlg)].tag.len,
ZSW(dlg->legs[callee_idx(dlg)].tag.s));
} else {
/* dialog successfully removed from timer -> unref */
unref++;
}
unref_dlg(dlg, 1 + unref);
if_update_stat(dlg_enable_stats, active_dlgs, -1);
return 0;
malformed:
return -1;
}
/**
* replicates the remote update of a cseq of a dialog locally
* by reading the relevant information using the Binary Packet Interface
*/
int dlg_replicated_cseq_updated(bin_packet_t *packet)
{
str call_id, from_tag, to_tag;
unsigned int dir, dst_leg = -1;
unsigned int cseq;
struct dlg_cell *dlg;
unsigned int h_id;
int h_entry;
struct dlg_entry *d_entry;
short pkg_ver = get_bin_pkg_version(packet);
DLG_BIN_POP(str, packet, call_id, malformed);
DLG_BIN_POP(str, packet, from_tag, malformed);
DLG_BIN_POP(str, packet, to_tag, malformed);
LM_DBG("Updating cseq for dialog with callid: %.*s\n", call_id.len, call_id.s);
if (pkg_ver == DLG_BIN_V4) {
DLG_BIN_POP(int, packet, h_id, malformed);
h_entry = dlg_hash(&call_id);
d_entry = &(d_table->entries[h_entry]);
dlg_lock(d_table, d_entry);
dlg = lookup_dlg_unsafe(h_entry, h_id);
if (dlg && !match_dialog(dlg, &call_id, &from_tag, &to_tag, &dir, &dst_leg)) {
LM_ERR("Failed to match dialog\n");
dlg_unlock(d_table, d_entry);
return -1;
}
dlg_unlock(d_table, d_entry);
} else {
dlg = get_dlg(&call_id, &from_tag, &to_tag, &dir, &dst_leg);
}
if (!dlg) {
/* may be already deleted due to timeout */
LM_DBG("dialog not found (callid: |%.*s| ftag: |%.*s|\n",
call_id.len, call_id.s, from_tag.len, from_tag.s);
return 0;
}
DLG_BIN_POP(int, packet, cseq, malformed);
dlg->legs[dst_leg].last_gen_cseq = cseq;
if (pkg_ver != DLG_BIN_V4)
unref_dlg(dlg, 1);
return 0;
malformed:
LM_ERR("malformed cseq update packet for %.*s\n", call_id.len, call_id.s);
return -1;
}
#undef DLG_BIN_POP
#define DLG_BIN_PUSH_ROUTE(_packet, _dlg, _type) \
do { \
str __s; \
if (_dlg->rt_ ## _type>0) { \
__s.s = sroutes->request[_dlg->rt_ ## _type].name; \
__s.len = strlen(__s.s); \
bin_push_str(_packet, &__s); \
} else { \
bin_push_str(_packet, NULL); \
} \
} while(0)
void bin_push_dlg(bin_packet_t *packet, struct dlg_cell *dlg)
{
int callee_leg;
str *vars, *profiles;
callee_leg = callee_idx(dlg);
bin_push_str(packet, &dlg->callid);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].tag);
bin_push_str(packet, &dlg->legs[callee_leg].tag);
bin_push_str(packet, &dlg->from_uri);
bin_push_str(packet, &dlg->to_uri);
bin_push_int(packet, dlg->h_id);
bin_push_int(packet, dlg->start_ts);
bin_push_int(packet, dlg->state);
bin_push_str(packet,
get_socket_internal_name(dlg->legs[DLG_CALLER_LEG].bind_addr));
if (dlg->legs[callee_leg].bind_addr)
bin_push_str(packet,
get_socket_internal_name(dlg->legs[callee_leg].bind_addr));
else
bin_push_str(packet, NULL);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].r_cseq);
bin_push_str(packet, &dlg->legs[callee_leg].r_cseq);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].route_set);
bin_push_str(packet, &dlg->legs[callee_leg].route_set);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].contact);
bin_push_str(packet, &dlg->legs[callee_leg].contact);
bin_push_str(packet, &dlg->legs[callee_leg].from_uri);
bin_push_str(packet, &dlg->legs[callee_leg].to_uri);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].in_sdp);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].out_sdp);
bin_push_str(packet, &dlg->legs[callee_leg].in_sdp);
bin_push_str(packet, &dlg->legs[callee_leg].out_sdp);
bin_push_str(packet, &dlg->legs[DLG_CALLER_LEG].adv_contact);
bin_push_str(packet, &dlg->legs[callee_leg].adv_contact);
/* give modules the chance to write values/profiles before replicating */
run_dlg_callbacks(DLGCB_WRITE_VP, dlg, NULL, DLG_DIR_NONE, NULL, 1, 1);
/* save sharing tag name as dlg val */
if (dlg->shtag.s && store_dlg_value_unsafe(dlg, &shtag_dlg_val, &dlg->shtag) < 0)
LM_ERR("Failed to store sharing tag name as dlg val\n");
vars = write_dialog_vars(dlg->vals);
profiles = write_dialog_profiles(dlg->profile_links);
bin_push_str(packet, vars);
bin_push_str(packet, profiles);
bin_push_int(packet, dlg->user_flags);
bin_push_int(packet, dlg->mod_flags);
bin_push_int(packet, dlg->flags & ~(DLG_FLAG_NEW|DLG_FLAG_CHANGED|
DLG_FLAG_VP_CHANGED|DLG_FLAG_FROM_DB|DLG_FLAG_SYNCED));
bin_push_int(packet, (unsigned int)time(0) + dlg->tl.timeout - get_ticks());
bin_push_int(packet, dlg->legs[DLG_CALLER_LEG].last_gen_cseq);
bin_push_int(packet, dlg->legs[callee_leg].last_gen_cseq);
DLG_BIN_PUSH_ROUTE( packet, dlg, on_answer);
DLG_BIN_PUSH_ROUTE( packet, dlg, on_timeout);
DLG_BIN_PUSH_ROUTE( packet, dlg, on_hangup);
}
/* Binary Packet sending functions */
/**
* replicates a locally created dialog to all the destinations
* specified with the 'replicate_dialogs' modparam
*/
void replicate_dialog_created(struct dlg_cell *dlg)
{
int rc;
bin_packet_t packet;
dlg_lock_dlg(dlg);
if (dlg->state != DLG_STATE_CONFIRMED_NA && dlg->state != DLG_STATE_CONFIRMED) {
/* we don't need to replicate when in deleted state */
LM_WARN("not replicating dlg create message due to bad state %d (%.*s)\n",
dlg->state, dlg->callid.len, dlg->callid.s);
goto no_send;
}
if (dlg->replicated) {
/* already created - must be a retransmission */
LM_DBG("not replicating retransmission for %p (%.*s)\n",
dlg, dlg->callid.len, dlg->callid.s);
goto no_send;
}
if (bin_init(&packet, &dlg_repl_cap, REPLICATION_DLG_CREATED, BIN_VERSION, 0) != 0)
goto init_error;
if (dlg_has_reinvite_pinging(dlg) && persist_reinvite_pinging(dlg))
LM_ERR("failed to persist Re-INVITE pinging info\n");
bin_push_dlg(&packet, dlg);
dlg->replicated = 1;
dlg_unlock_dlg(dlg);
rc = clusterer_api.send_all(&packet, dialog_repl_cluster);
switch (rc) {
case CLUSTERER_CURR_DISABLED:
LM_INFO("Current node is disabled in cluster: %d\n", dialog_repl_cluster);
goto error;
case CLUSTERER_DEST_DOWN:
LM_INFO("All destinations in cluster: %d are down or probing\n",
dialog_repl_cluster);
goto error;
case CLUSTERER_SEND_ERR:
LM_ERR("Error sending in cluster: %d\n", dialog_repl_cluster);
goto error;
}
if_update_stat(dlg_enable_stats,create_sent,1);
bin_free_packet(&packet);
return;
error:
bin_free_packet(&packet);
LM_ERR("Failed to replicate created dialog\n");
return;
init_error:
LM_ERR("Failed to replicate created dialog\n");
no_send:
dlg_unlock_dlg(dlg);
return;
}
/**
* replicates a local dialog update in the cluster
*/
void replicate_dialog_updated(struct dlg_cell *dlg)
{
int rc;
bin_packet_t packet;
dlg_lock_dlg(dlg);
if (dlg->state < DLG_STATE_CONFIRMED_NA) {
LM_DBG("not replicating update in state %d (%.*s)\n", dlg->state,
dlg->callid.len, dlg->callid.s);
goto end;
}
if (dlg->state == DLG_STATE_DELETED) {
/* we no longer need to update anything */
LM_WARN("not replicating dlg update message due to bad state %d (%.*s)\n",
dlg->state, dlg->callid.len, dlg->callid.s);
goto end;
}
if (bin_init(&packet, &dlg_repl_cap, REPLICATION_DLG_UPDATED, BIN_VERSION, 0) != 0)
goto init_error;
if (dlg_has_reinvite_pinging(dlg) && persist_reinvite_pinging(dlg))
LM_ERR("failed to persist Re-INVITE pinging info\n");
bin_push_dlg(&packet, dlg);
dlg->replicated = 1;
dlg_unlock_dlg(dlg);
rc = clusterer_api.send_all(&packet, dialog_repl_cluster);
switch (rc) {
case CLUSTERER_CURR_DISABLED:
LM_INFO("Current node is disabled in cluster: %d\n", dialog_repl_cluster);
goto error;
case CLUSTERER_DEST_DOWN:
LM_ERR("All destinations in cluster: %d are down or probing\n",
dialog_repl_cluster);
goto error;
case CLUSTERER_SEND_ERR:
LM_ERR("Error sending in cluster: %d\n", dialog_repl_cluster);
goto error;
}
if_update_stat(dlg_enable_stats,update_sent,1);
bin_free_packet(&packet);
return;
error:
LM_ERR("Failed to replicate updated dialog\n");
bin_free_packet(&packet);
return;
init_error:
LM_ERR("Failed to replicate updated dialog\n");
end:
dlg_unlock_dlg(dlg);
}
/**
* replicates a local dialog delete event to all the destinations
* specified with the 'replicate_dialogs' modparam
*/
void replicate_dialog_deleted(struct dlg_cell *dlg)
{
int rc;
bin_packet_t packet;
if (bin_init(&packet, &dlg_repl_cap, REPLICATION_DLG_DELETED, BIN_VERSION, 1024) != 0)
goto error;
bin_push_str(&packet, &dlg->callid);
bin_push_str(&packet, &dlg->legs[DLG_CALLER_LEG].tag);
bin_push_str(&packet, &dlg->legs[callee_idx(dlg)].tag);
bin_push_int(&packet, dlg->h_id);
rc = clusterer_api.send_all(&packet, dialog_repl_cluster);
switch (rc) {
case CLUSTERER_CURR_DISABLED:
LM_INFO("Current node is disabled in cluster: %d\n", dialog_repl_cluster);
goto error_free;
case CLUSTERER_DEST_DOWN:
LM_ERR("All destinations in cluster: %d are down or probing\n",
dialog_repl_cluster);
goto error_free;
case CLUSTERER_SEND_ERR:
LM_ERR("Error sending in cluster: %d\n", dialog_repl_cluster);
goto error_free;
}
if_update_stat(dlg_enable_stats, delete_sent, 1);
bin_free_packet(&packet);
return;
error_free:
bin_free_packet(&packet);
error:
LM_ERR("Failed to replicate deleted dialog\n");
}
/**
* replicates a local dialog cseq increased for a specific leg