测试demo
#include <winsock2.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if 0
#define TCP
#else
#define UDP
#endif #pragma comment(lib, "ws2_32.lib")
char *ip = "10.8.2.60";
#ifdef UDP
short port = ;
#endif
#ifdef TCP
short port = ;
#endif
SOCKET fd; int init(void) {
WSADATA wsaData;
int nRet;
if((nRet = WSAStartup(MAKEWORD(,),&wsaData)) != ){
printf("WSAStartup failed!\n");
exit();
}
} int init_socket(void){
SOCKADDR_IN local;
#ifdef UDP
if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -){
#endif
#ifdef TCP
if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -){
#endif
printf("%d\n", WSAGetLastError());
perror("socket");
//getchar();
return -;
} printf("fd:%d start......\n", fd); local.sin_family = AF_INET;
local.sin_port = htons((short)port);
local.sin_addr.s_addr = inet_addr(ip);
//local.sin_addr.S_un.S_addr = inet_addr(ip); if (bind(fd, (SOCKADDR *)&local, sizeof(local)) == SOCKET_ERROR) {
printf("reason %d ", WSAGetLastError());
printf("bind failed!\n");
getchar();
return -;
} #ifdef TCP
if (listen(fd, ) == -){
perror("listen");
return -;
}
#endif
return ;
} int main(int argc, char *argv[]) {
char buffer[];
int size;
SOCKADDR_IN from;
int addrlen = sizeof(from);
SOCKET client;
unsigned int index = ; init();
if (init_socket()) {
//printf("init socket error!\n");
return -;
} while (){
index++;
#ifdef UDP
size = recvfrom(fd, buffer, sizeof(buffer), , NULL, NULL);
printf("recvfrom:%d index:%u\n", size, index);
#endif
#ifdef TCP
if ((client = accept(fd, (SOCKADDR *)&from, &addrlen)) == -){
perror("accept");
return -;
}
size = recv(client, buffer, sizeof(buffer), );
printf("recv:%d\n", size);
#endif
} getchar();
return ;
}
以上是 server 端,一下是 client 端:
#include <winsock2.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h> #if 0
#define UDP
#else
#define TCP
#endif #pragma comment(lib, "ws2_32.lib")
char *ip = "10.8.2.56"; #ifdef UDP
short port = ;
#else
short port = ;
#endif SOCKET fd; int init(void) {
WSADATA wsaData;
int nRet;
if((nRet = WSAStartup(MAKEWORD(,),&wsaData)) != ){
printf("WSAStartup failed!\n");
exit();
}
} int init_socket(void){ #ifdef UDP
if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -){
#else
SOCKADDR_IN local;
if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -){
#endif
printf("%d\n", WSAGetLastError());
perror("socket");
//getchar();
return -;
} #ifdef TCP local.sin_family = AF_INET;
local.sin_port = htons(port);
local.sin_addr.S_un.S_addr = inet_addr(ip); if (connect(fd, (SOCKADDR *)&local, sizeof(local)) == SOCKET_ERROR) {
printf("connect error!\n");
perror("connect");
return -;
}
#endif
printf("fd:%d start......\n", fd); return ;
} int main(int argc, char *argv[]) {
char buffer[];
int size;
int result = ;
unsigned int index = ; init(); if (init_socket()){
return -;
} #ifdef UDP
SOCKADDR_IN sin;
int addrlen = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr.s_addr = inet_addr(ip);
#endif memset(buffer, , sizeof(buffer));
while () {
#ifdef UDP
result = sendto(fd, buffer, sizeof(buffer), , (SOCKADDR *)&sin, addrlen);
#else
result = send(fd, buffer, sizeof(buffer), );
#endif
printf("result:%d, index:%d\n", result, index);
getchar();
index++;
} return ;
}