socket实现进程间通信

show me your code:

服务器端：

#include 
#include 
#include 
#include 
#include 
#include 
 
#define SERV_TCP_PORT 8000 /* server's port number */
#define MAX_SIZE 80
 
int main(int argc, char *argv[])
{
  int sockfd, newsockfd, clilen;
  struct sockaddr_in cli_addr, serv_addr;
  int port;
  char string[MAX_SIZE];
  int len;
  
  /* command line: server [port_number] */
  
  if(argc == 2) 
     sscanf(argv[1], "%d", &port); /* read the port number if provided */
  else
     port = SERV_TCP_PORT;
  
  /* open a TCP socket (an Internet stream socket) */
  if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
     perror("can't open stream socket");
     exit(1);
  }
  	
  /* bind the local address, so that the cliend can send to server */
  bzero((char *) &serv_addr, sizeof(serv_addr));
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);   /* 或者使用INADDR_LOOPBACK都可以 */
  serv_addr.sin_port = htons(port);
  
  if(bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
     perror("can't bind local address");
     exit(1);
  }
	
  /* listen to the socket */
  listen(sockfd, 5);
 
  for(;;) {
 
     /* wait for a connection from a client; this is an iterative server */
     clilen = sizeof(cli_addr);
     newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
		
     if(newsockfd < 0) {
        perror("can't bind local address");
     }
   
     /* read a message from the client */
     len = read(newsockfd, string, MAX_SIZE); 
     /* make sure it's a proper string */
     string[len] = 0;
     printf("%s\n", string);
     
     close(newsockfd);
  }  
}
 
 

客户端：

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
 
#define SERV_TCP_PORT 8000 /* server's port */
 
int main(int argc, char *argv[])
{
  int sockfd;
  struct sockaddr_in serv_addr;
  char *serv_host = "localhost";
  struct hostent *host_ptr;
  int port;
  int buff_size = 0;
 
  /* command line: client [host [port]]*/
  if(argc >= 2) 
     serv_host = argv[1]; /* read the host if provided */
  if(argc == 3)
     sscanf(argv[2], "%d", &port); /* read the port if provided */
  else 
     port = SERV_TCP_PORT;
 
  /* get the address of the host */
  if((host_ptr = gethostbyname(serv_host)) == NULL) {
     perror("gethostbyname error");
     exit(1);
  }
  
  if(host_ptr->h_addrtype !=  AF_INET) {
     perror("unknown address type");
     exit(1);
  }
  
  bzero((char *) &serv_addr, sizeof(serv_addr));
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = 
     ((struct in_addr *)host_ptr->h_addr_list[0])->s_addr;
  serv_addr.sin_port = htons(port);
  
 
  /* open a TCP socket */
  if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
     perror("can't open stream socket");
     exit(1);
  }
 
  /* connect to the server */    
  if(connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
     perror("can't connect to server");
     exit(1);
  }
 
  /* write a message to the server */
  write(sockfd, "hello world", sizeof("hello world"));
    
  close(sockfd);
}
 
 

Makefile

all: server client
 
server: server.o
	gcc -o server server.o 
 
server.o: server.c
	gcc -c server.c
 
client: client.o
	gcc -o client client.o -lnsl
 
client.o: client.c
	gcc -c client.c