服务端: // // main.m // server // // Created by mac on 13-4-15. // Copyright (c) 2013年 mac. All rights reserved. // #import <Foundation/Foundation.h> #import <sys/types.h> #import <sys/socket.h> #import <netinet/in.h> #import <arpa/inet.h> int CreateServerSocket(short port) { int socket_server=0; socket_server=socket(AF_INET,SOCK_STREAM,0); //填充IP与端口 /* struct sockaddr_in { __uint8_t sin_len; sa_family_t sin_family; in_port_t sin_port; struct in_addr sin_addr; char sin_zero[8]; }; */ struct sockaddr_in sAddr = {0}; sAddr.sin_len=sizeof(sAddr); sAddr.sin_family=AF_INET; sAddr.sin_port= htons(port); //本机字节序转网络字节序 sAddr.sin_addr.s_addr=INADDR_ANY; //绑定 //(struct sockaddr *)&sAddr强转 if (bind(socket_server, (struct sockaddr *)&sAddr, sizeof(sAddr)) != 0) { return 0; } //监听 if(listen(socket_server, 100) != 0){ return 0; } return socket_server; } //接收连接并返回客户端的scoket int AcceptClientSocket(int ServerSocket) { int ClinetSocket=0; struct sockaddr_in cAddr = {0}; socklen_t len=sizeof(cAddr); ClinetSocket = accept(ServerSocket, (struct sockaddr *)&cAddr, &len); char * ipaddress=inet_ntoa(cAddr.sin_addr); printf("accept--->%s,%d",ipaddress,cAddr.sin_port); return ClinetSocket; } void Message(int socket) { char send_Message[1024]="hello "; char recv_Message[1024]={0}; send(socket, send_Message, strlen(send_Message)+1, 0); while (1) { recv(socket, recv_Message, sizeof(recv_Message), 0); printf("<-----%s",recv_Message); printf("----->"); fgets(send_Message, sizeof(send_Message), stdin); send(socket,send_Message,strlen(send_Message)+1,0); } } int main(int argc, const char * argv[]) { short port=9898; if (argc>1) { port=(short)atoi(argv[1]); } int ServerSocket = CreateServerSocket(port); if (ServerSocket == 0) { printf("Cerate scoket error "); return 0; } printf("Cerate scoket ok! "); while (true) { int ClinetScoket=AcceptClientSocket(ServerSocket); if (ClinetScoket == 0) { printf("Client connect error "); return 0; } printf("Client connect ok..... "); Message(ClinetScoket); return 0; } // //接收连接 //// accept(<#int#>, <#struct sockaddr *restrict#>, <#socklen_t *restrict#>) // struct sockaddr sAdd2={0}; // socklen_t len=sizeof(struct sockaddr); // accept(ServerSocket, &sAdd2, &len); return 0; } 客户端: // // main.m // client // // Created by mac on 13-4-15. // Copyright (c) 2013年 mac. All rights reserved. // #import <Foundation/Foundation.h> #import <sys/types.h> #import <sys/socket.h> #import <netinet/in.h> #import <arpa/inet.h> int CreateClinetSocket() { int ClinetSocket = 0; ClinetSocket = socket(AF_INET, SOCK_STREAM, 0); return ClinetSocket; } int ConnectionToServer(int client_socket,const char * server_ip,unsigned short port) { struct sockaddr_in sAddr={0}; sAddr.sin_len=sizeof(sAddr); sAddr.sin_family=AF_INET; inet_aton(server_ip, &sAddr.sin_addr); sAddr.sin_port=htons(port); if (connect(client_socket, (struct sockaddr *)&sAddr, sizeof(sAddr))==0) { return client_socket; } return 0; } //client void Message(int socket) { char send_Message[1024]="0"; char recv_Message[1024]={0}; while (1) { recv(socket, recv_Message, sizeof(recv_Message), 0); printf("<-----%s",recv_Message); printf("----->"); fgets(send_Message, sizeof(send_Message), stdin); send(socket,send_Message,strlen(send_Message)+1,0); } } int main(int argc, const char * argv[]) { const char * server_ip="127.0.0.1"; short server_port=9898; if (argc>1) { server_ip = argv[1]; } if (argc>2) { server_port=(short)atoi(argv[2]); } int client_socket= CreateClinetSocket(); if (ConnectionToServer(client_socket,server_ip, server_port)==0) { printf("Connect to server error "); return 0; } printf("Connect to server ok "); Message(client_socket); return 0; }