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clusterer.c
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clusterer.c
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/*
* Copyright (C) 2015-2017 OpenSIPS Project
*
* 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.
*
*
* history:
* ---------
* 2015-07-07 created by Marius Cristian Eseanu
* 2016-07-xx rework (rvlad-patrascu)
*/
#include "../../str.h"
#include "../../dprint.h"
#include "../../mem/mem.h"
#include "../../mem/shm_mem.h"
#include "../../locking.h"
#include "../../rw_locking.h"
#include "../../bin_interface.h"
#include "../../timer.h"
#include "../../forward.h"
#include "../../ipc.h"
#include "api.h"
#include "node_info.h"
#include "clusterer.h"
#include "topology.h"
#include "sync.h"
#include "sharing_tags.h"
#include "clusterer_evi.h"
struct clusterer_binds clusterer_api;
enum sip_protos clusterer_proto = PROTO_BIN;
str cl_internal_cap = str_init("clusterer-internal");
str cl_extra_cap = str_init("clusterer-extra");
extern int ping_interval;
extern int node_timeout;
extern int ping_timeout;
extern int seed_fb_interval;
extern int sync_timeout;
int dispatch_jobs = 1;
void sync_check_timer(utime_t ticks, void *param)
{
cluster_info_t *cl;
struct local_cap *cap;
struct timeval now;
gettimeofday(&now, NULL);
lock_start_read(cl_list_lock);
for (cl = *cluster_list; cl; cl = cl->next) {
lock_get(cl->current_node->lock);
if (!(cl->current_node->flags & NODE_STATE_ENABLED)) {
lock_release(cl->current_node->lock);
continue;
}
lock_release(cl->current_node->lock);
for (cap = cl->capabilities; cap; cap = cap->next) {
lock_get(cl->lock);
if ((cap->flags & CAP_STATE_ENABLED) &&
!(cap->flags & CAP_STATE_OK)) {
if ((cap->flags & CAP_SYNC_PENDING) &&
(cl->current_node->flags & NODE_IS_SEED) &&
(TIME_DIFF(cap->sync_req_time, now) >=
seed_fb_interval*1000000)) {
cap->flags |= CAP_STATE_OK;
cap->flags &= ~CAP_SYNC_PENDING;
LM_INFO("No donor found, falling back to synced state\n");
/* send update about the state of this capability */
send_single_cap_update(cl, cap, 1);
} else if ((cap->flags & CAP_SYNC_IN_PROGRESS) &&
(get_ticks() - cap->last_sync_pkt >= sync_timeout)) {
handle_sync_end(cl, cap, 0, 1);
LM_INFO("Sync timeout for capability [%.*s], reverting to "
"not synced state\n", cap->reg.name.len, cap->reg.name.s);
}
}
lock_release(cl->lock);
}
}
lock_stop_read(cl_list_lock);
}
int cl_set_state(int cluster_id, int node_id, enum cl_node_state state)
{
cluster_info_t *cluster = NULL;
node_info_t *node;
int ev_actions_required = 1;
int new_link_states = 0;
lock_start_read(cl_list_lock);
cluster = get_cluster_by_id(cluster_id);
if (!cluster) {
lock_stop_read(cl_list_lock);
LM_ERR("Cluster id [%d] not found\n", cluster_id);
return -1;
}
if (node_id != current_id) {
node = get_node_by_id(cluster, node_id);
if (!node) {
lock_stop_read(cl_list_lock);
LM_ERR("Node id [%d] not found\n", node_id);
return 1;
}
lock_get(node->lock);
if (state == STATE_DISABLED && node->flags & NODE_STATE_ENABLED)
new_link_states = LS_DOWN;
else if (state == STATE_ENABLED && !(node->flags & NODE_STATE_ENABLED))
new_link_states = LS_RESTART_PINGING;
if (state == STATE_DISABLED)
node->flags &= ~NODE_STATE_ENABLED;
else
node->flags |= NODE_STATE_ENABLED;
lock_release(node->lock);
if (new_link_states == LS_DOWN) {
set_link_w_neigh_adv(-1, LS_DOWN, node);
do_actions_node_ev(cluster, &ev_actions_required, 1);
} else if (new_link_states == LS_RESTART_PINGING) {
set_link_w_neigh(LS_RESTART_PINGING, node);
}
lock_stop_read(cl_list_lock);
LM_INFO("Set state: %s for node: %d in cluster: %d\n",
state ? "enabled" : "disabled", node_id, cluster_id);
if (db_mode && update_db_state(cluster_id, node_id, state) < 0)
LM_ERR("Failed to update state in clusterer DB for node [%d] cluster [%d]\n",
node_id, cluster_id);
return 0;
}
lock_get(cluster->current_node->lock);
if (state == STATE_DISABLED && cluster->current_node->flags & NODE_STATE_ENABLED)
new_link_states = LS_DOWN;
else if (state == STATE_ENABLED && !(cluster->current_node->flags & NODE_STATE_ENABLED))
new_link_states = LS_RESTART_PINGING;
if (state == STATE_DISABLED)
cluster->current_node->flags &= ~NODE_STATE_ENABLED;
else
cluster->current_node->flags |= NODE_STATE_ENABLED;
lock_release(cluster->current_node->lock);
if (new_link_states == LS_DOWN) {
for (node = cluster->node_list; node; node = node->next)
set_link_w_neigh(LS_DOWN, node);
do_actions_node_ev(cluster, &ev_actions_required, 1);
} else if (new_link_states == LS_RESTART_PINGING) {
for (node = cluster->node_list; node; node = node->next)
set_link_w_neigh(LS_RESTART_PINGING, node);
}
lock_stop_read(cl_list_lock);
LM_INFO("Set state: %s for local node in cluster: %d\n",
state ? "enabled" : "disabled", cluster_id);
if (db_mode && update_db_state(cluster_id, current_id, state) < 0)
LM_ERR("Failed to update state in clusterer DB for cluster [%d]\n", cluster->cluster_id);
return 0;
}
int mi_cap_set_state(int cluster_id, str *capability, int status)
{
cluster_info_t *cluster;
struct local_cap *cap;
int change = 0;
lock_start_read(cl_list_lock);
cluster = get_cluster_by_id(cluster_id);
if (!cluster) {
lock_stop_read(cl_list_lock);
LM_ERR("Cluster id [%d] not found\n", cluster_id);
return -1;
}
for (cap = cluster->capabilities; cap &&
str_strcmp(capability, &cap->reg.name); cap = cap->next) ;
if (!cap) {
lock_stop_read(cl_list_lock);
LM_ERR("Capability [%.*s] not found\n",
capability->len, capability->s);
return -2;
}
lock_get(cluster->lock);
if (status == CAP_DISABLED && cap->flags & CAP_STATE_ENABLED) {
cap->flags &= ~CAP_STATE_ENABLED;
cap->flags &= ~CAP_STATE_OK;
change = 1;
} else if (status == CAP_ENABLED && !(cap->flags & CAP_STATE_ENABLED)) {
cap->flags |= CAP_STATE_ENABLED;
change = 1;
}
lock_release(cluster->lock);
if (change)
send_single_cap_update(cluster, cap, status);
lock_stop_read(cl_list_lock);
return 0;
}
int get_capability_status(cluster_info_t *cluster, str *capability)
{
struct local_cap *cap;
for (cap = cluster->capabilities; cap &&
str_strcmp(capability, &cap->reg.name); cap = cap->next) ;
if (!cap) {
LM_ERR("Capability [%.*s] not found\n",
capability->len, capability->s);
return -1;
}
return (cap->flags&CAP_STATE_ENABLED) ?
CAP_ENABLED : CAP_DISABLED;
}
/* @return:
* 0 : success, message sent
* -1 : error, unable to send
* -2 : dest down or probing
*/
static int msg_send_retry(bin_packet_t *packet, node_info_t *dest,
int change_dest, int *ev_actions_required)
{
int retr_send = 0;
node_info_t *chosen_dest = dest;
str send_buffer;
do {
lock_get(chosen_dest->lock);
if (chosen_dest->link_state != LS_UP) {
lock_release(chosen_dest->lock);
chosen_dest = get_next_hop_2(dest);
if (!chosen_dest) {
if (retr_send)
return -1;
else
return -2;
}
} else
lock_release(chosen_dest->lock);
/* change destination node id */
if (change_dest || chosen_dest != dest) {
bin_remove_int_buffer_end(packet, 1);
bin_push_int(packet, dest->node_id);
}
bin_get_buffer(packet, &send_buffer);
if (msg_send(chosen_dest->cluster->send_sock, chosen_dest->proto,
&chosen_dest->addr, 0, send_buffer.s, send_buffer.len, 0) < 0) {
LM_ERR("msg_send() to node [%d] failed\n", chosen_dest->node_id);
retr_send = 1;
/* this node was supposed to be up, retry pinging */
set_link_w_neigh_adv(-1, LS_RESTART_PINGING, chosen_dest);
*ev_actions_required = 1;
} else {
LM_DBG("sent bin packet to node [%d]\n", chosen_dest->node_id);
retr_send = 0;
}
} while (retr_send);
return 0;
}
enum clusterer_send_ret clusterer_send_msg(bin_packet_t *packet,
int cluster_id, int dst_node_id, int check_cap, int locked)
{
node_info_t *node;
int rc;
cluster_info_t *cl;
int ev_actions_required = 0;
str capability;
if (!cl_list_lock) {
LM_ERR("cluster shutdown - cannot send new messages!\n");
return CLUSTERER_CURR_DISABLED;
}
if (!locked)
lock_start_read(cl_list_lock);
cl = get_cluster_by_id(cluster_id);
if (!cl) {
LM_ERR("Unknown cluster id [%d]\n", cluster_id);
if (!locked)
lock_stop_read(cl_list_lock);
return CLUSTERER_SEND_ERR;
}
lock_get(cl->current_node->lock);
if (!(cl->current_node->flags & NODE_STATE_ENABLED)) {
lock_release(cl->current_node->lock);
if (!locked)
lock_stop_read(cl_list_lock);
return CLUSTERER_CURR_DISABLED;
}
lock_release(cl->current_node->lock);
node = get_node_by_id(cl, dst_node_id);
if (!node) {
LM_ERR("Node id [%d] not found in cluster\n", dst_node_id);
if (!locked)
lock_stop_read(cl_list_lock);
return CLUSTERER_SEND_ERR;
}
lock_get(node->lock);
if (!(node->flags & NODE_STATE_ENABLED)) {
lock_release(node->lock);
lock_stop_read(cl_list_lock);
LM_DBG("node disabled, skip message sending\n");
return CLUSTERER_SEND_SUCCESS;
}
lock_release(node->lock);
if (check_cap) {
bin_get_capability(packet, &capability);
rc = get_capability_status(cl, &capability);
if (rc == -1) {
lock_stop_read(cl_list_lock);
return CLUSTERER_SEND_ERR;
} else if (rc == CAP_DISABLED) {
lock_stop_read(cl_list_lock);
LM_DBG("capability disabled, skip message sending\n");
return CLUSTERER_SEND_SUCCESS;
}
}
rc = msg_send_retry(packet, node, 0, &ev_actions_required);
bin_remove_int_buffer_end(packet, 3);
if (ev_actions_required)
do_actions_node_ev(cl, &ev_actions_required, 1);
if (!locked)
lock_stop_read(cl_list_lock);
switch (rc) {
case 0:
return CLUSTERER_SEND_SUCCESS;
case -1:
return CLUSTERER_SEND_ERR;
case -2:
return CLUSTERER_DEST_DOWN;
}
return CLUSTERER_SEND_ERR;
}
static enum clusterer_send_ret
clusterer_bcast_msg(bin_packet_t *packet, int dst_cid,
enum cl_node_match_op match_op, int check_cap)
{
node_info_t *node;
int rc, sent = 0, down = 1, matched_once = 0;
cluster_info_t *dst_cl;
int ev_actions_required = 0;
str capability;
if (!cl_list_lock) {
LM_ERR("cluster shutdown - cannot send new messages!\n");
return CLUSTERER_CURR_DISABLED;
}
lock_start_read(cl_list_lock);
dst_cl = get_cluster_by_id(dst_cid);
if (!dst_cl) {
LM_ERR("Unknown cluster, id [%d]\n", dst_cid);
lock_stop_read(cl_list_lock);
return CLUSTERER_SEND_ERR;
}
lock_get(dst_cl->current_node->lock);
if (!(dst_cl->current_node->flags & NODE_STATE_ENABLED)) {
lock_release(dst_cl->current_node->lock);
lock_stop_read(cl_list_lock);
return CLUSTERER_CURR_DISABLED;
}
lock_release(dst_cl->current_node->lock);
if (check_cap) {
bin_get_capability(packet, &capability);
rc = get_capability_status(dst_cl, &capability);
if (rc == -1) {
lock_stop_read(cl_list_lock);
return CLUSTERER_SEND_ERR;
} else if (rc == CAP_DISABLED) {
lock_stop_read(cl_list_lock);
LM_DBG("capability [%.*s] disabled, skip message sending\n",
capability.len, capability.s);
return CLUSTERER_SEND_SUCCESS;
}
}
for (node = dst_cl->node_list; node; node = node->next) {
if (!match_node(dst_cl->current_node, node, match_op))
continue;
lock_get(node->lock);
if (!(node->flags & NODE_STATE_ENABLED)) {
lock_release(node->lock);
LM_DBG("node disabled, skip message sending\n");
continue;
}
lock_release(node->lock);
matched_once = 1;
rc = msg_send_retry(packet, node, 1, &ev_actions_required);
if (rc != -2) /* at least one node is up */
down = 0;
if (rc == 0) /* at least one message is sent successfully */
sent = 1;
}
bin_remove_int_buffer_end(packet, 3);
if (ev_actions_required)
do_actions_node_ev(dst_cl, &ev_actions_required, 1);
lock_stop_read(cl_list_lock);
if (!matched_once)
return CLUSTERER_SEND_SUCCESS;
if (down)
return CLUSTERER_DEST_DOWN;
if (sent)
return CLUSTERER_SEND_SUCCESS;
else
return CLUSTERER_SEND_ERR;
}
int msg_add_trailer(bin_packet_t *packet, int cluster_id, int dst_id)
{
if (bin_push_int(packet, cluster_id) < 0)
return -1;
if (bin_push_int(packet, current_id) < 0)
return -1;
if (bin_push_int(packet, dst_id) < 0)
return -1;
return 0;
}
static int prep_gen_msg(bin_packet_t *packet, int cluster_id, int dst_id,
str *gen_msg, str *exchg_tag, int req_like)
{
/* build packet */
if (bin_init(packet, &cl_extra_cap, CLUSTERER_GENERIC_MSG, BIN_VERSION, 0) < 0) {
LM_ERR("Failed to init bin send buffer\n");
return -1;
}
/* mark this message as request-like if it is the case */
if (bin_push_int(packet, req_like) < 0)
return -1;
/* include an 'exchange tag' in order to possbily correlate the messages
* sent with replies to be received (which should contain the same tag) */
if (bin_push_str(packet, exchg_tag) < 0)
return -1;
if (bin_push_str(packet, gen_msg) < 0)
return -1;
/* add the trailer as for an usual module message */
if (msg_add_trailer(packet, cluster_id, dst_id) < 0)
return -1;
return 0;
}
enum clusterer_send_ret cl_send_to(bin_packet_t *packet, int cluster_id, int node_id)
{
if (msg_add_trailer(packet, cluster_id, node_id) < 0) {
LM_ERR("Failed to add trailer to module's message\n");
return CLUSTERER_SEND_ERR;
}
return clusterer_send_msg(packet, cluster_id, node_id, 1, 0);
}
enum clusterer_send_ret cl_send_all(bin_packet_t *packet, int cluster_id)
{
if (msg_add_trailer(packet, cluster_id, -1 /* dummy value */) < 0) {
LM_ERR("Failed to add trailer to module's message\n");
return CLUSTERER_SEND_ERR;
}
return clusterer_bcast_msg(packet, cluster_id, NODE_CMP_ANY, 1);
}
enum clusterer_send_ret
cl_send_all_having(bin_packet_t *packet, int dst_cluster_id,
enum cl_node_match_op match_op)
{
if (msg_add_trailer(packet, dst_cluster_id, -1 /* dummy value */) < 0) {
LM_ERR("Failed to add trailer to module's message\n");
return CLUSTERER_SEND_ERR;
}
return clusterer_bcast_msg(packet, dst_cluster_id, match_op, 1);
}
enum clusterer_send_ret send_gen_msg(int cluster_id, int dst_id, str *gen_msg,
str *exchg_tag, int req_like)
{
bin_packet_t packet;
int rc;
if (prep_gen_msg(&packet, cluster_id, dst_id, gen_msg, exchg_tag, req_like) < 0) {
LM_ERR("Failed to build generic clusterer message\n");
return CLUSTERER_SEND_ERR;
}
rc = clusterer_send_msg(&packet, cluster_id, dst_id, 0, 0);
bin_free_packet(&packet);
return rc;
}
enum clusterer_send_ret bcast_gen_msg(int cluster_id, str *gen_msg, str *exchg_tag)
{
bin_packet_t packet;
int rc;
if (prep_gen_msg(&packet, cluster_id, -1 /* dummy value */, gen_msg,
exchg_tag, 1) < 0) {
LM_ERR("Failed to build generic clusterer message\n");
return CLUSTERER_SEND_ERR;
}
rc = clusterer_bcast_msg(&packet, cluster_id, NODE_CMP_ANY, 0);
bin_free_packet(&packet);
return rc;
}
enum clusterer_send_ret send_mi_cmd(int cluster_id, int dst_id, str cmd_name,
mi_item_t *cmd_params_arr, int no_params)
{
bin_packet_t packet;
int i, rc;
str val;
if (bin_init(&packet, &cl_extra_cap, CLUSTERER_MI_CMD, BIN_VERSION, 0) < 0) {
LM_ERR("Failed to init bin send buffer\n");
return CLUSTERER_SEND_ERR;
}
if (bin_push_str(&packet, &cmd_name) < 0)
return CLUSTERER_SEND_ERR;
if (bin_push_int(&packet, no_params) < 0)
return CLUSTERER_SEND_ERR;
for (i = 0; i < no_params; i++) {
if (get_mi_arr_param_string(cmd_params_arr, i, &val.s, &val.len) < 0)
return CLUSTERER_SEND_ERR;
if (bin_push_str(&packet, &val) < 0)
return CLUSTERER_SEND_ERR;
}
if (msg_add_trailer(&packet, cluster_id, dst_id ? dst_id : -1) < 0) {
LM_ERR("Failed to add trailer to module's message\n");
return CLUSTERER_SEND_ERR;
}
if (dst_id)
rc = clusterer_send_msg(&packet, cluster_id, dst_id, 0, 0);
else
rc = clusterer_bcast_msg(&packet, cluster_id, NODE_CMP_ANY, 0);
bin_free_packet(&packet);
return rc;
}
enum clusterer_send_ret bcast_remove_node(int cluster_id, int target_node)
{
bin_packet_t packet;
int rc;
if (bin_init(&packet, &cl_extra_cap, CLUSTERER_REMOVE_NODE,
BIN_VERSION, 0) < 0) {
LM_ERR("Failed to init bin send buffer\n");
return CLUSTERER_SEND_ERR;
}
if (bin_push_int(&packet, target_node) < 0)
return CLUSTERER_SEND_ERR;
if (msg_add_trailer(&packet, cluster_id, -1) < 0) {
LM_ERR("Failed to add trailer to module's message\n");
return CLUSTERER_SEND_ERR;
}
rc = clusterer_bcast_msg(&packet, cluster_id, NODE_CMP_ANY, 0);
bin_free_packet(&packet);
return rc;
}
static inline int su_ip_cmp(union sockaddr_union* s1, union sockaddr_union* s2)
{
if (s1->s.sa_family != s2->s.sa_family)
return 0;
switch(s1->s.sa_family) {
case AF_INET:
return (memcmp(&s1->sin.sin_addr, &s2->sin.sin_addr, 4) == 0);
case AF_INET6:
return (memcmp(&s1->sin6.sin6_addr, &s2->sin6.sin6_addr, 16) == 0);
default:
LM_CRIT("unknown address family %d\n",
s1->s.sa_family);
return 0;
}
}
static int ip_check(cluster_info_t *cluster, union sockaddr_union *su, str *ip_str)
{
node_info_t *node;
str sip_addr;
char *p;
for (node = cluster->node_list; node; node = node->next)
if (su) {
if (su_ip_cmp(su, &node->addr))
return 1;
} else if (ip_str && ip_str->s) {
if ((p = q_memchr(node->sip_addr.s, ':', node->sip_addr.len))) {
sip_addr.s = node->sip_addr.s;
sip_addr.len = p - node->sip_addr.s;
} else
sip_addr = node->sip_addr;
if (!str_strcmp(ip_str, &sip_addr))
return 1;
} else {
LM_ERR("No address to check\n");
return 0;
}
return 0;
}
int clusterer_check_addr(int cluster_id, str *ip_str,
enum node_addr_type check_type)
{
cluster_info_t *cluster;
int rc;
struct ip_addr ip;
union sockaddr_union su;
lock_start_read(cl_list_lock);
cluster = get_cluster_by_id(cluster_id);
if (!cluster) {
LM_WARN("Unknown cluster id [%d]\n", cluster_id);
return 0;
}
if (check_type == NODE_BIN_ADDR) {
ip.af = AF_INET;
ip.len = 16;
if (inet_pton(AF_INET, ip_str->s, ip.u.addr) <= 0) {
LM_ERR("Invalid IP address\n");
return 0;
}
ip_addr2su(&su, &ip, 0);
rc = ip_check(cluster, &su, NULL);
} else if (check_type == NODE_SIP_ADDR) {
rc = ip_check(cluster, NULL, ip_str);
} else {
LM_ERR("Bad address type\n");
rc = 0;
}
lock_stop_read(cl_list_lock);
/* return 1 if addr matched, 0 for ALL other cases, unless return codes implemented */
return rc;
}
static void handle_cap_update(bin_packet_t *packet, node_info_t *source)
{
str cap;
int nr_cap, i, j;
struct remote_cap *cur;
struct local_cap *lcap;
int nr_nodes;
int node_id;
node_info_t *node;
int cap_state;
int rc;
int require_reply;
int seq_no, timestamp;
bin_pop_int(packet, &seq_no);
bin_pop_int(packet, ×tamp);
lock_get(source->lock);
if (validate_update(source->cap_seq_no, seq_no,
source->cap_timestamp, timestamp, 0, source->node_id) < 0) {
lock_release(source->lock);
return;
} else {
source->cap_seq_no = seq_no;
source->cap_timestamp = timestamp;
}
lock_release(source->lock);
bin_pop_int(packet, &nr_nodes);
for (i = 0; i < nr_nodes; i++) {
bin_pop_int(packet, &node_id);
if (node_id == current_id) {
bin_pop_int(packet, &nr_cap);
for (j = 0; j < nr_cap; j++) {
bin_pop_str(packet, &cap);
bin_pop_int(packet, &cap_state);
}
continue;
}
node = get_node_by_id(source->cluster, node_id);
if (!node) {
LM_ERR("Unknown id [%d] in capability update from node [%d]\n",
node_id, source->node_id);
return;
}
bin_pop_int(packet, &nr_cap);
for (j = 0; j < nr_cap; j++) {
bin_pop_str(packet, &cap);
bin_pop_int(packet, &cap_state);
lock_get(node->lock);
for (cur = node->capabilities; cur && str_strcmp(&cap, &cur->name);
cur = cur->next) ;
if (!cur) { /* new capability */
cur = shm_malloc(sizeof(struct remote_cap) + cap.len);
if (!cur) {
LM_ERR("No more shm memory!\n");
lock_release(node->lock);
return;
}
memset(cur, 0, sizeof *cur);
cur->name.s = (char *)(cur + 1);
cur->name.len = cap.len;
memcpy(cur->name.s, cap.s, cap.len);
cur->next = node->capabilities;
node->capabilities = cur;
}
if (cap_state == 0)
cur->flags &= ~CAP_STATE_OK;
else if (cap_state == 1)
cur->flags |= CAP_STATE_OK;
else
LM_ERR("Received bad state for capability:%.*s from node [%d]\n",
cap.len, cap.s, source->node_id);
lock_release(node->lock);
/* for a node in state OK, check pending sync requests */
if (cap_state == 1) {
for (lcap = source->cluster->capabilities; lcap; lcap = lcap->next)
if (!str_strcmp(&cap, &lcap->reg.name))
break;
if (lcap) {
lock_get(source->cluster->lock);
if (lcap->flags & CAP_SYNC_PENDING) {
lock_release(source->cluster->lock);
if (!match_node(source->cluster->current_node, node,
lcap->reg.sync_cond)) {
LM_DBG("no match for node id %d\n", node->node_id);
continue;
}
rc = send_sync_req(&cap, source->cluster->cluster_id,
node_id);
if (rc == CLUSTERER_SEND_SUCCESS) {
lock_get(source->cluster->lock);
lcap->flags &= ~CAP_SYNC_PENDING;
lock_release(source->cluster->lock);
} else if (rc == CLUSTERER_SEND_ERR)
LM_ERR("Failed to send sync request to node: %d\n",
node_id);
} else
lock_release(source->cluster->lock);
}
}
}
}
bin_pop_int(packet, &require_reply);
if (require_reply)
/* also send current node's capabilities information to source node */
send_cap_update(source, 0);
/* flood to other neighbours */
flood_message(packet, source->cluster, source->node_id, require_reply);
}
static void handle_internal_msg(bin_packet_t *received, int packet_type,
node_info_t *src_node, struct timeval rcv_time, int *ev_actions_required)
{
switch (packet_type) {
case CLUSTERER_PONG:
LM_DBG("Received ping reply from node [%d]\n", src_node->node_id);
handle_pong(received, src_node, rcv_time, ev_actions_required);
break;
case CLUSTERER_PING:
handle_ping(received, src_node, rcv_time, ev_actions_required);
break;
case CLUSTERER_LS_UPDATE:
handle_ls_update(received, src_node, ev_actions_required);
break;
case CLUSTERER_FULL_TOP_UPDATE:
LM_DBG("Received full topology update with source [%d]\n", src_node->node_id);
handle_full_top_update(received, src_node, ev_actions_required);
break;
case CLUSTERER_UNKNOWN_ID:
LM_DBG("Received UNKNOWN_ID from node [%d]\n", src_node->node_id);
handle_unknown_id(src_node);
break;
case CLUSTERER_NODE_DESCRIPTION:
LM_DBG("Already got node description for source [%d], drop this message\n",
src_node->node_id);
break;
case CLUSTERER_CAP_UPDATE:
LM_DBG("Received capability update with source [%d]\n", src_node->node_id);
handle_cap_update(received, src_node);
break;
default:
LM_WARN("Invalid clusterer binary packet command [%d] from node: %d\n",
packet_type, src_node->node_id);
}
}
static void handle_cl_gen_msg(bin_packet_t *packet, int cluster_id, int source_id)
{
int req_like;
str rcv_msg, rcv_tag;
LM_DBG("Received generic clusterer message\n");
bin_pop_int(packet, &req_like);
bin_pop_str(packet, &rcv_tag);
bin_pop_str(packet, &rcv_msg);
if (raise_gen_msg_ev(cluster_id, source_id, req_like, &rcv_tag, &rcv_msg)) {
LM_ERR("Failed to raise event for a received generic message!\n");
return;
}
}
static void handle_cl_mi_msg(bin_packet_t *packet)
{
str cmd_params[MI_CMD_MAX_NR_PARAMS];
str cmd_name;
int i, no_params;
int rc;
bin_pop_str(packet, &cmd_name);
LM_DBG("Received MI command <%.*s>\n", cmd_name.len, cmd_name.s);
bin_pop_int(packet, &no_params);
for (i = 0; i < no_params; i++)
bin_pop_str(packet, &cmd_params[i]);
rc = run_rcv_mi_cmd(&cmd_name, cmd_params, no_params);
if (rc == -1) {
LM_ERR("MI command <%.*s> failed\n", cmd_name.len, cmd_name.s);
return;
}
LM_INFO("MI command <%.*s> returned with %s\n",
cmd_name.len, cmd_name.s, (rc == 1) ? "error" : "success");
}
static void handle_remove_node(bin_packet_t *packet, cluster_info_t *cl)
{
int target_node;
node_info_t *node;
int ev_actions_cl = 1;
bin_pop_int(packet, &target_node);
LM_DBG("Received remove node command for node id: [%d]\n", target_node);
if (db_mode) {
LM_DBG("We are in DB mode, ignoring received remove node command\n");
return;
}
if (target_node == current_id) {
lock_get(cl->current_node->lock);
if (cl->current_node->flags & NODE_STATE_ENABLED) {
cl->current_node->flags &= ~NODE_STATE_ENABLED;
lock_release(cl->current_node->lock);
for (node = cl->node_list; node; node = node->next) {
set_link_w_neigh(LS_DOWN, node);
do_actions_node_ev(cl, &ev_actions_cl, 1);
}
} else {
lock_release(cl->current_node->lock);
}
return;
}
node = get_node_by_id(cl, target_node);
if (!node) {
LM_DBG("Unknown node [%d] to remove\n", target_node);
return;
}
remove_node(cl, node);
}
void bin_rcv_cl_extra_packets(bin_packet_t *packet, int packet_type,
struct receive_info *ri, void *att)
{
int source_id, dest_id, cluster_id;
cluster_info_t *cl;
node_info_t *node;
int ev_actions_required = 0;
char *ip;
unsigned short port;
bin_pop_back_int(packet, &dest_id);
bin_pop_back_int(packet, &source_id);
bin_pop_back_int(packet, &cluster_id);
get_su_info(&ri->src_su.s, ip, port);
LM_DBG("received clusterer message from: %s:%hu with source id: %d and"
" cluster id: %d\n", ip, port, source_id, cluster_id);
if (source_id == current_id) {
LM_ERR("Received message with bad source - same node id as this instance\n");
return;