【网络编程】——windows socket 编程
测试demo
1 #include <winsock2.h> 2 #include <stdio.h> 3 #include <string.h> 4 #include <stdlib.h> 5 #if 0 6 #define TCP 7 #else 8 #define UDP 9 #endif 10 11 #pragma comment(lib, "ws2_32.lib") 12 char *ip = "10.8.2.60"; 13 #ifdef UDP 14 short port = 1025; 15 #endif 16 #ifdef TCP 17 short port = 2222; 18 #endif 19 SOCKET fd; 20 21 int init(void) { 22 WSADATA wsaData; 23 int nRet; 24 if((nRet = WSAStartup(MAKEWORD(2,2),&wsaData)) != 0){ 25 printf("WSAStartup failed!\n"); 26 exit(0); 27 } 28 } 29 30 int init_socket(void){ 31 SOCKADDR_IN local; 32 #ifdef UDP 33 if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1){ 34 #endif 35 #ifdef TCP 36 if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1){ 37 #endif 38 printf("%d\n", WSAGetLastError()); 39 perror("socket"); 40 //getchar(); 41 return -1; 42 } 43 44 printf("fd:%d start......\n", fd); 45 46 local.sin_family = AF_INET; 47 local.sin_port = htons((short)port); 48 local.sin_addr.s_addr = inet_addr(ip); 49 //local.sin_addr.S_un.S_addr = inet_addr(ip); 50 51 if (bind(fd, (SOCKADDR *)&local, sizeof(local)) == SOCKET_ERROR) { 52 printf("reason %d ", WSAGetLastError()); 53 printf("bind failed!\n"); 54 getchar(); 55 return -1; 56 } 57 58 #ifdef TCP 59 if (listen(fd, 10) == -1){ 60 perror("listen"); 61 return -1; 62 } 63 #endif 64 return 0; 65 } 66 67 int main(int argc, char *argv[]) { 68 char buffer[2048]; 69 int size; 70 SOCKADDR_IN from; 71 int addrlen = sizeof(from); 72 SOCKET client; 73 unsigned int index = 0; 74 75 init(); 76 if (init_socket()) { 77 //printf("init socket error!\n"); 78 return -1; 79 } 80 81 while (1){ 82 index++; 83 #ifdef UDP 84 size = recvfrom(fd, buffer, sizeof(buffer), 0, NULL, NULL); 85 printf("recvfrom:%d index:%u\n", size, index); 86 #endif 87 #ifdef TCP 88 if ((client = accept(fd, (SOCKADDR *)&from, &addrlen)) == -1){ 89 perror("accept"); 90 return -1; 91 } 92 size = recv(client, buffer, sizeof(buffer), 0); 93 printf("recv:%d\n", size); 94 #endif 95 } 96 97 getchar(); 98 return 0; 99 }
以上是 server 端，一下是 client 端：
1 #include <winsock2.h> 2 #include <stdio.h> 3 #include <string.h> 4 #include <stdlib.h> 5 6 #if 0 7 #define UDP 8 #else 9 #define TCP 10 #endif 11 12 #pragma comment(lib, "ws2_32.lib") 13 char *ip = "10.8.2.56"; 14 15 #ifdef UDP 16 short port = 1025; 17 #else 18 short port = 2222; 19 #endif 20 21 SOCKET fd; 22 23 int init(void) { 24 WSADATA wsaData; 25 int nRet; 26 if((nRet = WSAStartup(MAKEWORD(2,2),&wsaData)) != 0){ 27 printf("WSAStartup failed!\n"); 28 exit(0); 29 } 30 } 31 32 int init_socket(void){ 33 34 35 #ifdef UDP 36 if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1){ 37 #else 38 SOCKADDR_IN local; 39 if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1){ 40 #endif 41 printf("%d\n", WSAGetLastError()); 42 perror("socket"); 43 //getchar(); 44 return -1; 45 } 46 47 #ifdef TCP 48 49 local.sin_family = AF_INET; 50 local.sin_port = htons(port); 51 local.sin_addr.S_un.S_addr = inet_addr(ip); 52 53 if (connect(fd, (SOCKADDR *)&local, sizeof(local)) == SOCKET_ERROR) { 54 printf("connect error!\n"); 55 perror("connect"); 56 return -1; 57 } 58 #endif 59 printf("fd:%d start......\n", fd); 60 61 return 0; 62 } 63 64 int main(int argc, char *argv[]) { 65 char buffer[512]; 66 int size; 67 int result = 0; 68 unsigned int index = 0; 69 70 init(); 71 72 if (init_socket()){ 73 return -1; 74 } 75 76 #ifdef UDP 77 SOCKADDR_IN sin; 78 int addrlen = sizeof(sin); 79 sin.sin_family = AF_INET; 80 sin.sin_port = htons(port); 81 sin.sin_addr.s_addr = inet_addr(ip); 82 #endif 83 84 memset(buffer, 1, sizeof(buffer)); 85 while (1) { 86 #ifdef UDP 87 result = sendto(fd, buffer, sizeof(buffer), 0, (SOCKADDR *)&sin, addrlen); 88 #else 89 result = send(fd, buffer, sizeof(buffer), 0); 90 #endif 91 printf("result:%d, index:%d\n", result, index); 92 getchar(); 93 index++; 94 } 95 96 return 0; 97 }
