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#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/un.h>
#include <stddef.h>//offsetof
#include "hard_keepalive.h"
#include "main.h"
#include "MESA_handle_logger.h"
extern frag_rssb_parameter_t g_frag_run;
extern frag_rssb_configure_t g_frag_cfg;
extern frag_rssb_status_t g_frag_stat;
int udp_socket_recv(int sockfd, uint32_t *src_ip, uint16_t *src_port, uint8_t *buf, uint32_t buf_size)
{
if (NULL == buf) return -1;
int numbytes;
struct sockaddr_storage their_addr;
socklen_t addr_len = sizeof(their_addr);
if ((numbytes = recvfrom(sockfd, buf, buf_size , 0,(struct sockaddr *)&their_addr, &addr_len)) == -1)
{
perror("recvfrom");
return -1;
}
*src_ip = ((struct sockaddr_in *)&their_addr)->sin_addr.s_addr;
*src_port = ((struct sockaddr_in *)&their_addr)->sin_port;
return numbytes;
}
// send udp packet
int udp_socket_send(int sockfd, uint32_t addr, uint16_t port, char *data, int datalen)
{
struct sockaddr_in dst_addr; /* connector's address information */
dst_addr.sin_family = AF_INET; /* host byte order */
dst_addr.sin_port = port; /* short, network byte order */
dst_addr.sin_addr.s_addr = addr;
bzero(&(dst_addr.sin_zero), 8); /* zero the rest of the struct */
int to_send_len=datalen;
int already_sended_len=0;
while(to_send_len>0)
{
already_sended_len=sendto(sockfd,data,
to_send_len-already_sended_len,
0,
(struct sockaddr *)&(dst_addr),
sizeof(dst_addr));
if(already_sended_len==-1)
{
if((EAGAIN == errno)||( EINTR == errno )|| (EWOULDBLOCK==errno))
{
continue;
}
else
{
return -1;
}
}
to_send_len-=already_sended_len;
}
return already_sended_len;
}
int create_recv_udp_socket(uint16_t port)
{
int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (-1 == sockfd)
{
perror("listener: socket");
return -1;
}
struct sockaddr_in my_addr; /* my address information */
my_addr.sin_family = AF_INET; /* host byte order */
my_addr.sin_port = port; /* short, network byte order */
my_addr.sin_addr.s_addr = INADDR_ANY; /* auto-fill with my IP */
bzero(&(my_addr.sin_zero), 8); /* zero the rest of the struct */
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
{
perror("listener: bind");
close(sockfd);
return -1;
}
return sockfd;
}
void* thread_hard_keepalive(void *param)
{
char buf[1500] = {0};
char discriminator_temp[ID_SIZE] = {0};
bfd_port_t* bfd_port = (bfd_port_t*)param;
int size = 0;
uint32_t src_ip = 0;
uint16_t src_port = 0;
int send_rec = 0;
fd_set rset;
int recv_pkt_sd = create_recv_udp_socket(htons(bfd_port->recv_port));
if(-1==recv_pkt_sd)
{
printf("hard_keepalive create socket error.\n");
return NULL;
}
while(1)
{
FD_ZERO(&rset);
FD_SET(recv_pkt_sd,&rset);
if(-1==select(recv_pkt_sd+1,&rset,NULL,NULL,NULL))
{
continue;
}
if(FD_ISSET(recv_pkt_sd, &rset))
{
size = udp_socket_recv(recv_pkt_sd, &src_ip, &src_port, (unsigned char*)buf, sizeof(buf));
if(size>0)
{
/*����discriminator*/
memcpy(discriminator_temp, buf+MY_ID_OFFSET, ID_SIZE);
memcpy(buf+MY_ID_OFFSET, buf+YOUR_ID_OFFSET, ID_SIZE);
memcpy(buf+YOUR_ID_OFFSET, discriminator_temp, ID_SIZE);
/*���Ͷ���state״̬*/
uint64_t state = getbit(g_frag_cfg.bfd_down_stat,0);
for(uint64_t i=1;i<g_frag_cfg.bfd_down_num;i++)
{
state &= getbit(g_frag_cfg.bfd_down_stat,i);
}
if(state)
{
/*STATE_DOWN 2bit: 0 1*/
clrbit(((bfd_header_t*)buf)->flags,7);
setbit(((bfd_header_t*)buf)->flags,6);
printf("wait_queue is overflow, app is down.\n");
MESA_handle_runtime_log(g_frag_run.logger, RLOG_LV_FATAL, FRAG_REASSEMBLY_MODULE_NAME,
"{%s:%d} wait_queue is overflow, app is down.",
__FILE__,__LINE__);
}
else
{
/*STATE_UP 2bit: 1 1*/
setbit(((bfd_header_t*)buf)->flags,7);
setbit(((bfd_header_t*)buf)->flags,6);
}
send_rec = udp_socket_send(recv_pkt_sd,
src_ip,
src_port,
(char*)buf,size);
if(-1==send_rec)
{
printf("hard_keepalive send pkt error.\n");
}
}
}
else
{
continue;
}
}
return NULL;
}
int hard_keepalive_run(void* bfd_port)
{
pthread_t thread_desc;
pthread_attr_t attr;
memset(&thread_desc, 0, sizeof(thread_desc));
memset(&attr, 0, sizeof(attr));
if(0 != pthread_attr_init(&(attr)))
{
return -1;
}
if(0 != pthread_attr_setdetachstate(&(attr), PTHREAD_CREATE_DETACHED))
{
return -1;
}
if(0 != pthread_create(&(thread_desc), &(attr), thread_hard_keepalive, (void*)bfd_port))
{
pthread_attr_destroy(&(attr));
return -1;
}
pthread_attr_destroy(&(attr));
return 0;
}
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