Server	Client
SocketCreate()	SocketCreate()
SocketBind()
SocketListen()
	SocketConnect()
SocketAccept()
SocketSend()/SocketRecv()	SocketRecv()/SocketSend()
SocketClose()	SocketClose()
SocketDestory()	SocketDestory()

DSock库中的实例TALK_TCP通过源代码展示了这种服务器-客户端模式，实例源代码如下：

服务器	客户端
s = SocketCreate(TCP_SOCKET); if(s==INVALID_SOCKET) { printf("SocketCreate() error\n"); DSock_Close(); return 1; } if(nArgCnt==1) /* Server mode */ TalkServer(s); else /* Client mode */ TalkClient(s,pszArg[1]);
if(SocketBind(s,0L,TALK_PORT)==FALSE) { printf("SocketBind() error\n"); return FALSE; }
if(SocketListen(s)==FALSE) { printf("SocketListen() error\n"); return FALSE; } printf("Talk server mode, listening...\n");
	printf("Talk client mode, connecting to server...\n"); /* Connect to server */ if(SocketConnect(s,inet_addr(szServer), TALK_PORT)==FALSE) { printf("SocketConnect() error\n"); return FALSE; }
/* Wait for client */ while(TRUE) { if(kbhit()) { printf("Break by user\n"); break; } if(SocketAccept(s,&dwIp)) { bConnected = TRUE; inet_ntoa(szBuf,dwIp); printf("Connected with %s\n",szBuf); break; } }
/* Is connected with client ? */ if(bConnected) { printf("Start to talk...\n"); while(TRUE) { /* Check key press */ if(kbhit()) { char c = getch(); SocketPutChar(s,c); if(c==27) { printf("\nProgram terminated\n"); break; } } /* Check message sent by client */ if(SocketDataReady(s)) { char c; SocketGetChar(s,&c); printf("%c",c); if(c==27) { printf("\nProgram terminated\n"); break; } } } }	printf("Connected to %s:%d\n",szServer,TALK_PORT); while(TRUE) { /* Check key press and send it out */ if(kbhit()) { char c = getch(); SocketPutChar(s,c); if(c==27) { printf("\nProgram terminated\n"); break; } } /* Check key press sent by server */ if(SocketDataReady(s)) { char c; SocketGetChar(s,&c); printf("%c",c); if(c==27) { printf("\nProgram terminated\n"); break; } } }
SocketClose(s); SocketDestory(s);

UDP服务器/客户端模式

s = SocketCreate(UDP_SOCKET); if(s==INVALID_SOCKET) { printf("SocketCreate() error\n"); DSock_Close(); return 1; } if(SocketBind(s,0xFFFFFFFFL,1234)==FALSE) { printf("SocketBind() error\n"); DSock_Close(); return 1; } printf("Start to talk, any press will be broadcast...\n"); while(TRUE) { /* User press keyboard ? */ if(kbhit()) { char c = getch(); if(c == 27) { printf("\nProgram terminated\n"); break; } } /* Is there any broadcast message ? */ if(SocketDataReady(s)) { char c; /* Save remote IP and port */ SocketRecvFrom(s, &dwAddr, &wPort,&c,1); printf("From %s:%d, send '%c' back.\n", inet_ntoa(szBuf, dwAddr), wPort, c); /* Send key press back to original port */ SocketSendTo(s, dwAddr, wPort, &c, 1); if(c == 27) { printf("\nProgram terminated\n"); break; } } } SocketClose(s); SocketDestory(s);

UDP广播

s = SocketCreate(UDP_SOCKET); if(s==INVALID_SOCKET) { printf("SocketCreate() error\n"); DSock_Close(); return 1; } if(SocketBind(s,0xFFFFFFFFL,1234)==FALSE) { printf("SocketBind() error\n"); DSock_Close(); return 1; } printf("Start to talk, any press will be broadcast...\n"); while(TRUE) { /* User press keyboard ? */ if(kbhit()) { char c = getch(); SocketPutChar(s,c); if(c==27) { printf("\nProgram terminated\n"); break; } } /* Is there any broadcast message ? */ if(SocketDataReady(s)) { char c; SocketGetChar(s,&c); printf("%c",c); if(c==27) { printf("\nProgram terminated\n"); break; } } } SocketClose(s); SocketDestory(s);

阻塞模式&非阻塞模式

#define MAX_SOCKET 5 SOCKET s[MAX_SOCKET]; for(i=0;i<MAX_SOCKET;i++) { s[i] = SocketCreate(TCP_SOCKET); if(s==INVALID_SOCKET) return; if(SocketBind(s[i],0L,nPort)==FALSE) return; if(SocketListen(s[i])==FALSE) return; } while(TRUE) { for(i=0;i<MAX_SOCKET;i++) if(SocketAccept(s[i],&dwIp)) { /* Do Job Here */ break; } }

实例

文件名称	描述
LIB.HTM	DSock库参考文件
LIB\DSOCK.H	DSock库头文件，C语言
LIB\DSOCK.LIB	DSock库，DOS系统、大型记忆体模式
LIB\DSOCK.CFG	缺省网络配置文件
LIB\PKTDRV\NE2000.COM	8019AS包驱动文件
LIB\PKTDRV\PKTDRV.BAT	装载包驱动的DOS 批处理文件

实例

Example Name	描述
DEMO\BOOTP	利用BOOTP/DHCP从DHCP服务器获取网络配置
DEMO\DNS	根据网络域名解析获得对应的IP地址
DEMO\FTPD	FTP服务器实例，缺省用户名是“dmp”，缺省密码是“dmp”
DEMO\HTTPD	Web服务器实例
DEMO\SMTP	发送e-mail的一个程序
DEMO\SMTPD	SMTP服务器实例
DEMO\TELNETD	简单的TELNET服务器实例，缺省用户名是“dmp”，缺省密码是“dmp”
DEMO\TALK_S	多TCP连接的谈话服务器实例
DEMO\TALK_TCP	运用TCP完成的谈话实例
DEMO\talk_tcp_win	用WinSock编写的Windows版本谈话（TCP）
DEMO\TALK_UB	运用广播完成的谈话实例
DEMO\talk_ub_win	用WinSock编写的Windows版本谈话（UB）
DEMO\TALK_UDP	运用UDP完成的谈话实例
DEMO\talk_udp_win	用WinSock编写的Windows版本谈话（UDP）
DEMO\SOCK_AP	支持FTP/HTTP/SMTP/TELNET的一个启动工程

DSOCK.CFG

典型DSOCK.CFG文件配置信息示例如下：

ip=192.168.0.234 netmask=255.255.255.0 gateway=192.168.0.1 nameserver=192.168.0.1

如果没有DNS服务器，nameserver标记符这样设置：“nameserver=”。如果没有网关，gateway 标记符的设置方法和nameserver标记符相同。

包驱动器