本地socket通信

1.server

 20 #include <stdio.h>
 21 #include <string.h>
 22 #include <stdlib.h>
 23 #include <unistd.h>
 24 #include <sys/socket.h>
 25 #include <sys/un.h>
 26 
 27 #define PATH "./tt"
 28 
 29 int main(int argc ,char *argv[])
 30 {
 31     int sockfd = 0;
 32     struct sockaddr_un addr;
 33     unlink(PATH);  
 34     addr.sun_family = AF_UNIX;
 35     strcpy(addr.sun_path,PATH);
 36 
 37     unsigned int len = strlen(addr.sun_path) + sizeof(addr.sun_family);
 38     sockfd = socket(AF_UNIX,SOCK_DGRAM,0);
 39     if(sockfd < 0 )
 40     {
 41         perror("socket error");
 42         exit(-1);
 43     }
 44 
 45     if(bind(sockfd,(struct sockaddr *)&addr,len) < 0)
 46     {
 47         perror("bind error");
 48         close(sockfd);
 49         exit(-1);
 50     }
 51     printf("Bind is ok\n");
 52 
 53     while(1)
 54     {
 55         char recv_buf[20] = "";
 56         recvfrom(sockfd,recv_buf,sizeof(recv_buf),0,(struct sockaddr*)&addr,&len);
 57         printf("Recv: %s\n",recv_buf);
 58     }
 59     return 0;
 60 
 61 }

2.client

#include <stdio.h>
 19 #include <string.h>
 20 #include <unistd.h>
 21 #include <stdlib.h>
 22 #include <sys/socket.h>
 23 #include <sys/un.h>
 24 
 25 #define PATH "./tt"
 26 
 27 int main(int argc,char *argv[])
 28 {
 29     int sockfd = 0;
 30     struct sockaddr_un addr;
 31     bzero(&addr,sizeof(addr));
 32 
 33     addr.sun_family = AF_UNIX;
 34     strcpy(addr.sun_path,PATH);
 35 
 36     sockfd = socket(AF_UNIX,SOCK_DGRAM,0);
 37     if(sockfd < 0)
 38     {
 39         perror("socket error");
 40         exit(-1);
 41     }
 42 
 43     while(1)
 44     {
 45         static int counter = 0;
 46         char send_buf[20] = "";
 47         counter++;
 48         sprintf(send_buf,"Counter is %d",counter);
 49         int len = strlen(addr.sun_path)+sizeof(addr.sun_family);
 50         sendto(sockfd,send_buf,strlen(send_buf),0,(struct sockaddr*)&addr,len);
 51         printf("Send: %s\n",send_buf);
 52         sleep(1);
 53     }
 54     return 0;
 55 }