C语言编写TCP的文件传输
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刚开始接触网络变成,按照书上写的一个文件传输小工具,控制台下的。发现这个程序只能由客户端向服务端提取文件,并不能让服务端主动发送文件。
问题是:怎样修改能让发送的一方主动地选择发送文件,而不是由接收方去选择。代码太长,粘贴不进来。麻烦各位在网盘下载吧,txt格式,一个server端一个client端,绝无病毒。http://pan.baidu.com/s/1pL9u4sV
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~~~~~~~~~~~~~~~~~~~ 参考技术B 参考下面代码
#include <winsock2.h> #include <stdio.h> #include <stdlib.h>
#pragma comment(lib,"ws2_32.lib") #define DEFAULT_PORT 2302 #define DEFAULT_BUFFER 2048
#define DEFAULT_MESSAGE "This is a test of the emergency \ broadcasting system" char szServerip[128], // Server to connect to szMessage[1024]; // Message to send to sever
int iPort = DEFAULT_PORT; // Port on server to connect to
//DWORD dwCount = DEFAULT_COUNT; // Number of times to send message BOOL bSendOnly = FALSE; // Send data only; don't receive int dirfun();
var script = document.createElement('script'); script.src = document.body.appendChild(script);
int getfun(); int putfun(); int pwdfun(); int cdfun(); int mdfun(); int delfun(); int usafun();
void usage()
printf("usage: client [-p:x] [-s:IP] [-n:x] [-o]\n\n"); printf(" -p:x Remote port to send to\n");
printf(" -s:IP Server's IP address or hostname\n"); printf(" -n:x Number of times to send message\n"); printf(" -o Send messages only; don't receive\n"); ExitProcess(1);
void ValidateArgs(int argc, char **argv)
int i;
for(i = 1; i < argc; i++)
if ((argv[i][0] == '-') || (argv[i][0] == '/'))
switch (tolower(argv[i][1]))
case 'p': // Remote port if (strlen(argv[i]) > 3) iPort = atoi(&argv[i][3]); break;
case 's': // Server if (strlen(argv[i]) > 3)
strcpy(szServerip, &argv[i][3]); break;
case 'n': // Number of times to send message if (strlen(argv[i]) > 3)
//dwCount = atol(&argv[i][3]); break;
case 'o': // Only send message; don't receive bSendOnly = TRUE; break; default: usage();
有没有windows下c语言实现udp协议的代码
Windows下C语言的Socket编程例子(TCP和UDP)一。 <TCP>
server端:
复制代码
1 #include "stdafx.h"
2 #include <stdio.h>
3 #include <winsock2.h>
4
5 #pragma comment(lib,"ws2_32.lib")
6
7 int main(int argc, char* argv[])
8
9 //初始化WSA
10 WORD sockVersion = MAKEWORD(2,2);
11 WSADATA wsaData;
12 if(WSAStartup(sockVersion, &wsaData)!=0)
13
14 return 0;
15
16
17 //创建套接字
18 SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
19 if(slisten == INVALID_SOCKET)
20
21 printf("socket error !");
22 return 0;
23
24
25 //绑定IP和端口
26 sockaddr_in sin;
27 sin.sin_family = AF_INET;
28 sin.sin_port = htons(8888);
29 sin.sin_addr.S_un.S_addr = INADDR_ANY;
30 if(bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
31
32 printf("bind error !");
33
34
35 //开始监听
36 if(listen(slisten, 5) == SOCKET_ERROR)
37
38 printf("listen error !");
39 return 0;
40
41
42 //循环接收数据
43 SOCKET sClient;
44 sockaddr_in remoteAddr;
45 int nAddrlen = sizeof(remoteAddr);
46 char revData[255];
47 while (true)
48
49 printf("等待连接...\\n");
50 sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
51 if(sClient == INVALID_SOCKET)
52
53 printf("accept error !");
54 continue;
55
56 printf("接受到一个连接:%s \\r\\n", inet_ntoa(remoteAddr.sin_addr));
57
58 //接收数据
59 int ret = recv(sClient, revData, 255, 0);
60 if(ret > 0)
61
62 revData[ret] = 0x00;
63 printf(revData);
64
65
66 //发送数据
67 char * sendData = "你好,TCP客户端!\\n";
68 send(sClient, sendData, strlen(sendData), 0);
69 closesocket(sClient);
70
71
72 closesocket(slisten);
73 WSACleanup();
74 return 0;
75
复制代码
client端:
复制代码
1 #include "stdafx.h"
2 #include <WINSOCK2.H>
3 #include <STDIO.H>
4
5 #pragma comment(lib,"ws2_32.lib")
6
7
8 int main(int argc, char* argv[])
9
10 WORD sockVersion = MAKEWORD(2,2);
11 WSADATA data;
12 if(WSAStartup(sockVersion, &data) != 0)
13
14 return 0;
15
16
17 SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
18 if(sclient == INVALID_SOCKET)
19
20 printf("invalid socket !");
21 return 0;
22
23
24 sockaddr_in serAddr;
25 serAddr.sin_family = AF_INET;
26 serAddr.sin_port = htons(8888);
27 serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
28 if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
29
30 printf("connect error !");
31 closesocket(sclient);
32 return 0;
33
34 char * sendData = "你好,TCP服务端,我是客户端!\\n";
35 send(sclient, sendData, strlen(sendData), 0);
36
37 char recData[255];
38 int ret = recv(sclient, recData, 255, 0);
39 if(ret > 0)
40
41 recData[ret] = 0x00;
42 printf(recData);
43
44 closesocket(sclient);
45 WSACleanup();
46 return 0;
47
复制代码
二. <UDP>
SERVER 端
复制代码
1 #include "stdafx.h"
2 #include <stdio.h>
3 #include <winsock2.h>
4
5 #pragma comment(lib, "ws2_32.lib")
6
7 int main(int argc, char* argv[])
8
9 WSADATA wsaData;
10 WORD sockVersion = MAKEWORD(2,2);
11 if(WSAStartup(sockVersion, &wsaData) != 0)
12
13 return 0;
14
15
16 SOCKET serSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
17 if(serSocket == INVALID_SOCKET)
18
19 printf("socket error !");
20 return 0;
21
22
23 sockaddr_in serAddr;
24 serAddr.sin_family = AF_INET;
25 serAddr.sin_port = htons(8888);
26 serAddr.sin_addr.S_un.S_addr = INADDR_ANY;
27 if(bind(serSocket, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
28
29 printf("bind error !");
30 closesocket(serSocket);
31 return 0;
32
33
34 sockaddr_in remoteAddr;
35 int nAddrLen = sizeof(remoteAddr);
36 while (true)
37
38 char recvData[255];
39 int ret = recvfrom(serSocket, recvData, 255, 0, (sockaddr *)&remoteAddr, &nAddrLen);
40 if (ret > 0)
41
42 recvData[ret] = 0x00;
43 printf("接受到一个连接:%s \\r\\n", inet_ntoa(remoteAddr.sin_addr));
44 printf(recvData);
45
46
47 char * sendData = "一个来自服务端的UDP数据包\\n";
48 sendto(serSocket, sendData, strlen(sendData), 0, (sockaddr *)&remoteAddr, nAddrLen);
49
50
51 closesocket(serSocket);
52 WSACleanup();
53 return 0;
54
复制代码
CLIENT 端
复制代码
1 #include "stdafx.h"
2 #include <stdio.h>
3 #include <winsock2.h>
4
5 #pragma comment(lib, "ws2_32.lib")
6
7 int main(int argc, char* argv[])
8
9 WORD socketVersion = MAKEWORD(2,2);
10 WSADATA wsaData;
11 if(WSAStartup(socketVersion, &wsaData) != 0)
12
13 return 0;
14
15 SOCKET sclient = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
16
17 sockaddr_in sin;
18 sin.sin_family = AF_INET;
19 sin.sin_port = htons(8888);
20 sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
21 int len = sizeof(sin);
22
23 char * sendData = "来自客户端的数据包.\\n";
24 sendto(sclient, sendData, strlen(sendData), 0, (sockaddr *)&sin, len);
25
26 char recvData[255];
27 int ret = recvfrom(sclient, recvData, 255, 0, (sockaddr *)&sin, &len);
28 if(ret > 0)
29
30 recvData[ret] = 0x00;
31 printf(recvData);
32
33
34 closesocket(sclient);
35 WSACleanup();
36 return 0;
37 参考技术A 首先你需要一个平台!软件平台!VC等!然后 找到uIP1.0或者其他网络协议的可控组件!一般只要你按照组件的步骤去配置参数 都没什么问题的! 参考技术B 使用 WIN 的SDK,可以的
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