int main()
{
int sock;
if((sock = socket(AF_INET, SOCK_STREAM, 0))<0)
ERR_EXIT("socket");
int reuse = 1;
if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))< 0)
ERR_EXIT("setsockopt");
struct sockaddr_in serveraddr;
serveraddr.sin_family = AF_INET;
serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
serveraddr.sin_port = htons(5188);
if(bind(sock, (struct sockaddr*)&serveraddr, sizeof(serveraddr))<0)
ERR_EXIT("bind");
if(listen(sock,10)<0)
ERR_EXIT("listen");
while(1)
{
struct sockaddr_in cliaddr;
memset(&cliaddr, 0, sizeof(cliaddr));
socklen_t len=0;
int c = accept(sock, (struct sockaddr*)&cliaddr, &len);
if(c <= 0)
continue;
int pid = fork();
if(pid < 0)
ERR_EXIT("fork");
else if(pid == 0)
{
echo_ser(c);
return -1;
}
close(c);
}
}
int main(int argc, char *argv[])
{
int msgid;
msgid = msgget(1234, IPC_CREAT | 0666);
if (msgid == -1)
ERR_EXIT("msgget");
echo_ser(msgid);
return 0;
}
/* unix domain socket与TCP套接字相比较，在同一台主机的传输速度前者是后者的两倍。*/
int main(void)
{
int listenfd;
if ((listenfd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
ERR_EXIT("socket error");
unlink("/tmp/test socket"); //地址复用
struct sockaddr_un servaddr;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sun_family = AF_UNIX;
strcpy(servaddr.sun_path, "/tmp/test socket");
if (bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
ERR_EXIT("bind error");
if (listen(listenfd, SOMAXCONN) < 0)
ERR_EXIT("listen error");
int conn;
pid_t pid;
while (1)
{
conn = accept(listenfd, NULL, NULL);
if (conn == -1)
{
if (conn == EINTR)
continue;
ERR_EXIT("accept error");
}
pid = fork();
if (pid == -1)
ERR_EXIT("fork error");
if (pid == 0)
{
close(listenfd);
echo_ser(conn);
exit(EXIT_SUCCESS);
}
close(conn);
}
return 0;
}
int main(void)
{
int sock;
if ((sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
ERR_EXIT("socket error");
struct sockaddr_in servaddr;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(5188);
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(sock, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
ERR_EXIT("bind error");
echo_ser(sock);
return 0;
}
