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#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/prctl.h>
#include "wy_singleflow_entry.h"
#include "wy_singleflow_keepalive.h"
#define DEFAULT_HOST_CAPACITY 4
#define LOAD_BALANC_VIRT_TIMES 16
extern struct wysf_global_info g_wysf_global_info;
static void conhash_delay_destroy_timer_cb(int fd, short kind, void *userp)
{
struct time_event *delay_event=(struct time_event *)userp;
conhash_instance_free(delay_event->conhash);
free(delay_event);
}
static void load_balance_common_timer_start(struct event *time_event)
{
struct timeval tv;
tv.tv_sec = 2;
tv.tv_usec = 0;
evtimer_add(time_event, &tv);
}
static void conhash_handle_delay_destroy(struct event_base *evbase, struct consistent_hash *conhash)
{
struct time_event *delay_event;
delay_event = (struct time_event *)malloc(sizeof(struct time_event));
delay_event->conhash = conhash;
evtimer_assign(&delay_event->timer_event, evbase, conhash_delay_destroy_timer_cb, delay_event);
load_balance_common_timer_start(&delay_event->timer_event);
}
static void conhash_insert_dest_host(struct judian_as_group *func_group, int32_t bucketid)
{
struct conhash_bucket bucket;
struct consistent_hash *tmphash, *newhash=NULL;
enum CONHASH_ERRCODE code;
bucket.bucket_id = bucketid;
bucket.point_num = DEFAULT_HOST_CAPACITY * LOAD_BALANC_VIRT_TIMES;;
bucket.tag = NULL;
newhash = conhash_instance_copy(func_group->conhash);
code = conhash_insert_bucket(newhash, &bucket);
assert(code == CONHASH_OK);
tmphash = func_group->conhash;
func_group->conhash = newhash;
conhash_handle_delay_destroy(g_wysf_global_info.alive_evbase , tmphash);
}
static void conhash_remove_dest_host(struct judian_as_group *func_group, int32_t bucketid)
{
struct consistent_hash *tmphash, *newhash=NULL;
enum CONHASH_ERRCODE code;
newhash = conhash_instance_copy(func_group->conhash);
code = conhash_remove_bucket(newhash, bucketid, NULL);
assert(code == CONHASH_OK || code==CONHASH_BUCKET_NOT_FOUND);
tmphash = func_group->conhash;
func_group->conhash = newhash;
conhash_handle_delay_destroy(g_wysf_global_info.alive_evbase, tmphash);
}
static int udp_keepalive_client_socket_init(void)
{
int on = 1, socket_fd;
if((socket_fd = socket(AF_INET,SOCK_DGRAM,0))<0)
{
return -1;
}
on = 5242880;
setsockopt(socket_fd, SOL_SOCKET, SO_SNDBUF, &on, sizeof(on));
evutil_make_socket_nonblocking(socket_fd);
return socket_fd;
}
void func_client_read_bfdres_cb(evutil_socket_t fd, short events, void *arg)
{
struct function_node *nodes=(struct function_node *)arg;
struct sockaddr_in saddr;
char buffer[2048];
int from_len, buf_len;
SAPP_TLV_T tlv_value;
from_len = sizeof (struct sockaddr);
while((buf_len = recvfrom (fd, buffer, 65536, 0, (struct sockaddr*)&saddr, (socklen_t *)&from_len))>0)
{
//BFD packet validate
nodes->retry_times = 0;
if(!nodes->conhash_inserted)
{
conhash_insert_dest_host(nodes->parent, nodes->ip_as_bucketid);
nodes->conhash_inserted = 1;
if(g_wysf_global_info.alive_func_nodes == 0)
{
memset(&tlv_value, 0, sizeof(SAPP_TLV_T));
tlv_value.type = GDEV_KEEPALIVE_OPT_GLOBAL_SWITCH;
tlv_value.int_value = 1;
tlv_value.length = sizeof(int);
gdev_keepalive_set_opt(&tlv_value);
}
g_wysf_global_info.alive_func_nodes += 1;
MESA_RUNTIME_LOGV3(g_wysf_global_info.log_runtime, RLOG_LV_DEBUG, "keepalive ip %s inserted", nodes->dst_ip_str);
}
from_len = sizeof (struct sockaddr);
}
}
void func_client_send_bfd_packet(struct function_node *nodes, const char *data, int datalen, struct sockaddr *dstaddr)
{
nodes->retry_times++;
if(datalen != sendto(nodes->udp_sockfd, data, datalen, 0, (struct sockaddr*)&nodes->sinaddr, sizeof(struct sockaddr)))
{
MESA_RUNTIME_LOGV3(g_wysf_global_info.log_runtime, RLOG_LV_DEBUG, "sendto ip %s failed: %s", nodes->dst_ip_str, strerror(errno));
}
}
static void func_client_alive_timer_cb(int fd, short kind, void *userp)
{
struct function_node *nodes=(struct function_node *)userp;
struct timeval tv;
SAPP_TLV_T tlv_value;
func_client_send_bfd_packet(nodes, NULL, 0, (struct sockaddr *)&nodes->sinaddr); //todo
if(nodes->conhash_inserted && nodes->retry_times >= g_wysf_global_info.bfd_timeout_times)
{
if(--g_wysf_global_info.alive_func_nodes == 0)
{
memset(&tlv_value, 0, sizeof(SAPP_TLV_T));
tlv_value.type = GDEV_KEEPALIVE_OPT_GLOBAL_SWITCH;
tlv_value.int_value = 0;
tlv_value.length = sizeof(int);
gdev_keepalive_set_opt(&tlv_value);
}
conhash_remove_dest_host(nodes->parent, nodes->ip_as_bucketid);
nodes->conhash_inserted = 0;
MESA_RUNTIME_LOGV3(g_wysf_global_info.log_runtime, RLOG_LV_DEBUG, "keepalive ip %s removed", nodes->dst_ip_str);
}
tv.tv_sec = 0;
tv.tv_usec = g_wysf_global_info.bfd_timeout_ms * 1000;
evtimer_add(&nodes->alive_detect_timer, &tv);
}
static void finger_fs_output_timer_cb(int fd, short kind, void *userp)
{
struct timeval tv;
u_int32_t bucket_num=0;
SAPP_TLV_T tlv_value;
for(int32_t i=0; i<g_wysf_global_info.func_group_num; i++)
{
bucket_num += conhash_get_bucket_num(g_wysf_global_info.judian_group_list[i]->conhash);
}
FS_operate(g_wysf_global_info.fsstat_handle, g_wysf_global_info.fsstat_status_ids[WYSF_FSSTAT_STATUS_ACTIVE_FUNC], 0, FS_OP_SET, bucket_num);
bucket_num = MESA_htable_get_elem_num(g_wysf_global_info.stream_tuple_mapping);
FS_operate(g_wysf_global_info.fsstat_handle, g_wysf_global_info.fsstat_status_ids[WYSF_FSSTAT_STATUS_FLOW_TABLE], 0, FS_OP_SET, bucket_num);
memset(&tlv_value, 0, sizeof(SAPP_TLV_T));
tlv_value.type = GDEV_KEEPALIVE_OPT_GLOBAL_SWITCH;
tlv_value.length = sizeof(int);
gdev_keepalive_get_opt(&tlv_value);
FS_operate(g_wysf_global_info.fsstat_handle, g_wysf_global_info.fsstat_status_ids[WYSF_FSSTAT_STATUS_KEEPALIVE], 0, FS_OP_SET, tlv_value.int_value);
FS_passive_output(g_wysf_global_info.fsstat_handle);
tv.tv_sec = g_wysf_global_info.fsstat_period;
tv.tv_usec = 0;
evtimer_add(&g_wysf_global_info.fs_timer_output, &tv);
}
void *thread_funcnode_keepalive(void *arg)
{
struct event_base *evbase;
struct judian_as_group *func_group;
struct timeval tv;
prctl(PR_SET_NAME, "wysf_alive");
g_wysf_global_info.alive_evbase = evbase = event_base_new();
for(int i=0; i<g_wysf_global_info.func_group_num; i++)
{
func_group = g_wysf_global_info.judian_group_list[i];
for(int j=0; j<func_group->func_nodes_num; j++)
{
func_group->func_nodes[i].udp_sockfd = udp_keepalive_client_socket_init();
event_assign(&func_group->func_nodes[i].msgevent, evbase, func_group->func_nodes[i].udp_sockfd, EV_READ|EV_PERSIST,
func_client_read_bfdres_cb, &func_group->func_nodes[i]);
event_add(&func_group->func_nodes[i].msgevent, NULL);
func_client_send_bfd_packet(&func_group->func_nodes[i], NULL, 0, (struct sockaddr *)&func_group->func_nodes[i].sinaddr); //todo
tv.tv_sec = 0;
tv.tv_usec = g_wysf_global_info.bfd_timeout_ms * 1000;
evtimer_assign(&func_group->func_nodes[i].alive_detect_timer, evbase, func_client_alive_timer_cb, &func_group->func_nodes[i]);
evtimer_add(&func_group->func_nodes[i].alive_detect_timer, &tv);
}
}
evtimer_assign(&g_wysf_global_info.fs_timer_output, evbase, finger_fs_output_timer_cb, NULL);
tv.tv_sec = g_wysf_global_info.fsstat_period;
tv.tv_usec = 0;
evtimer_add(&g_wysf_global_info.fs_timer_output, &tv);
MESA_RUNTIME_LOGV3(g_wysf_global_info.log_runtime, RLOG_LV_FATAL, "keepalive thread started.");
event_base_dispatch(evbase);
printf("Libevent dispath error, should not run here.\n");
MESA_RUNTIME_LOGV3(g_wysf_global_info.log_runtime, RLOG_LV_FATAL, "Libevent dispath error, should not run here.");
assert(0);return NULL;
}
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