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udp_reuseport_server.cc
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udp_reuseport_server.cc
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#include<sys/types.h>
#include<sys/socket.h>
#include<unistd.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<netdb.h>
#include<stdarg.h>
#include<string.h>
#include<iostream>
#include<pthread.h>
#include<string>
#include<sys/syscall.h>
using namespace std;
#define BUFFER_SIZE 1024
string g_ip;
unsigned short g_port;
pid_t gettid()
{
return syscall(SYS_gettid);
}
inline string IpU32ToString(unsigned ipv4)
{
char buf[INET_ADDRSTRLEN] = {0};
struct in_addr in;
in.s_addr = ipv4;
if(inet_ntop(AF_INET, &in ,buf, sizeof(buf)))
{
return string(buf);
}
else
{
return string("");
}
}
void start_udp_server(string &ip, unsigned port){
cout << "ip: " << ip << " " << port << " " << gettid() << endl;
struct sockaddr_in server_addr;
socklen_t server_addr_length = sizeof(server_addr);
//bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(ip.c_str());
server_addr.sin_port = htons(port);
int server_socket_fd = socket(AF_INET, SOCK_DGRAM, 0);
if(server_socket_fd < 0)
{
perror("Create Socket Failed:");
exit(1);
}
int opt_val = 1;
setsockopt(server_socket_fd, SOL_SOCKET, SO_REUSEPORT, &opt_val, sizeof(opt_val));
if(-1 == (bind(server_socket_fd,(struct sockaddr*)&server_addr,sizeof(server_addr))))
{
perror("Server Bind Failed:");
exit(1);
}
while(1){
struct sockaddr_in client_addr;
socklen_t client_addr_length = sizeof(client_addr);
char buffer[BUFFER_SIZE];
bzero(buffer, BUFFER_SIZE);
cout << "begin to recv data ..." << " " << gettid() << endl;
int res = recvfrom(server_socket_fd, buffer, BUFFER_SIZE,0,(struct sockaddr*)&client_addr, &client_addr_length);
if(res == -1)
{
perror("Receive Data Failed:");
exit(1);
}
cout << "recv " << res << " bytes from " << IpU32ToString(client_addr.sin_addr.s_addr) << ":" << server_addr.sin_port << " " << gettid() << endl;
res = sendto(server_socket_fd, buffer, res, 0, (struct sockaddr*)&client_addr,sizeof(client_addr));
if(res < 0)
{
perror("Send File Name Failed:");
exit(1);
}
cout << "response " << res << " bytes to client." << " " << gettid() << endl;
}
}
void* thread_func(void* arg){
start_udp_server(g_ip, g_port);
}
int main(int argc, char **argv){
if (argc < 4) {
cout << "Usage: " << argv[0] << " <local_ip> <udp_port> <thread_count>"<< endl;
exit(0);
}
g_ip = argv[1];
g_port = atoi(argv[2]);
int thread_count = atoi(argv[3]);
cout << "ip: " << g_ip << " port: " << g_port << " thread_cout: " << thread_count << endl;
for(int i = 0; i < thread_count; i++){
pthread_t thread_fd;
pthread_create(&thread_fd, NULL, &thread_func, NULL);
}
while(1){
sleep(3600);
}
return 0;
}