Mac OS X socket 1 [A simple example]

Mac OS X socket 1 [A simple example]

Server code

C:

//// Main. C // unix_socket_very_simple_server // created by DMD on 4/7/14. /* function: Server for Unix (OS X Mac) */# include <stdio. h> # include <stdlib. h> # include <sys/types. h> // UNIX socket # include <sys/socket. h> # include <netinet/in. h> # include <string. h> // the server and client both use port: 12345 // The server address is 127.0.0.1. You can write any address on the server, but you must write this address on the client. // Because the server address is unknown, int main (INT argc, const char * argv []) cannot be sent to the server. {// listen port [this port must be used by the client] unsigned short portnum = 12345; int SFP, NFP; struct sockaddr_in s_add, c_add; int sin_size; printf ("Starting listen in server: \ r \ n "); // initialize socket SFP = socket (af_inet, sock_stream, 0); // TCP: sock_stream if (-1 = SFP) {printf ("initialize socket fail! \ R \ n "); Return-1;} printf (" initialize socket OK! \ R \ n "); // setting SOCKET port bzero (& s_add, sizeof (struct sockaddr_in); s_add.sin_family = af_inet; s_add.sin_addr.s_addr = htonl (inaddr_any ); s_add.sin_port = htons (portnum); // bind port if (-1 = BIND (SFP, (struct sockaddr *) (& s_add), sizeof (struct sockaddr ))) {printf ("bind fail! \ R \ n "); Return-1;} printf (" bind OK! \ R \ n "); // start listening to the client port if (-1 = listen (SFP, 5) {printf (" Listen fail! \ R \ n "); Return-1;} printf (" Listen OK \ r \ n "); While (1) {sin_size = sizeof (struct sockaddr_in ); // accept data from the client nfp = accept (SFP, (struct sockaddr *) (& c_add), & sin_size); If (-1 = NFP) {printf ("Accept fail! \ R \ n "); Return-1;} // printf (" Accept data from client OK! \ R \ nserver start get connect from % d: % x \ r \ n ", ntohl (c_add.sin_addr.s_addr), ntohs (c_add.sin_port )); printf ("current client is address = % d, Port: % x \ r \ n", ntohl (c_add.sin_addr.s_addr), s_add.sin_port ); // send data if (-1 = write (nfp, "server said, \" Hello, welcome to connect my server. \ "\ r \ n", 1024) {printf ("send data to client fail! \ R \ n "); Return-1;} printf (" send data to client OK! \ R \ n "); close (NFP);} Close (SFP); Return 0 ;}

Client code

C:

////  main.c//  unix_socket_very_simple_client////  Created by DMD on 4/7/14./* Function : Client for unix (OS X MAC)*/#include <stdlib.h>#include <sys/types.h>#include <stdio.h>#include <sys/socket.h>#include <netinet/in.h>#include <string.h>int main(){    int cfd;    int recbytes;    int sin_size;    char buffer[1024]={0};    struct sockaddr_in s_add,c_add;    unsigned short portnum=12345;    printf("Hello,welcome to client !\r\n");        cfd = socket(AF_INET, SOCK_STREAM, 0);    if(-1 == cfd)    {        printf("initialize socket fail ! \r\n");        return -1;    }    printf("initialize socket ok !\r\n");        bzero(&s_add,sizeof(struct sockaddr_in));    s_add.sin_family=AF_INET;    s_add.sin_addr.s_addr= inet_addr("127.0.0.1");    s_add.sin_port=htons(portnum);    printf("current server addr = %d ,port : %x\r\n",s_add.sin_addr.s_addr,s_add.sin_port);        if(-1 == connect(cfd,(struct sockaddr *)(&s_add), sizeof(struct sockaddr)))    {        printf("connect fail !\r\n");        return -1;    }    printf("connect ok !\r\n");        if(-1 == (recbytes = read(cfd,buffer,1024)))    {        printf("read data from server fail !\r\n");        return -1;    }    printf("read data from server ok\r\n");    printf("Get Data From Server:\r\n");    buffer[recbytes]='\0';    printf("%s\r\n",buffer);    getchar();    close(cfd);    return 0;}

Test:

Run: Server

Run: Client

1. Show some message from server in client.

2. Every open client, show some message in server