初学socket编程,把书上的例子拷下来想自己跑一边试试,服务器端和客户端都在本机上,但connect时出现10049错误,不知道错在哪,程序贴在下面,希望大家给出具体修改方法,和错误的原因。
服务器端:
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_PORT 5150
#define DEFAULT_BUFFER 4096int iPort = DEFAULT_PORT;
BOOL bInterface = FALSE,
bRecvOnly = FALSE;
char szAddress[128]; void usage()
{
printf("usage: server [-p:x] [-i:IP] [-o]\n\n");
printf(" -p:x Port number to listen on\n");
printf(" -i:str Interface to listen on\n");
printf(" -o Don't echo the data back\n\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':
iPort = atoi(&argv[i][3]);
break;
case 'i':
bInterface = TRUE;
if (strlen(argv[i]) > 3)
strcpy(szAddress, &argv[i][3]);
break;
case 'o':
bRecvOnly = TRUE;
break;
default:
usage();
break;
}
}
}
}DWORD WINAPI ClientThread(LPVOID lpParam)
{
SOCKET sock=(SOCKET)lpParam;
char szBuff[DEFAULT_BUFFER];
int ret,
nLeft,
idx; while(1)
{
ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
if (ret == 0)
break;
else if (ret == SOCKET_ERROR)
{
printf("recv() failed: %d\n", WSAGetLastError());
break;
}
szBuff[ret] = '\0';
printf("RECV: '%s'\n", szBuff);
if (!bRecvOnly)
{
nLeft = ret;
idx = 0;
while(nLeft > 0)
{
ret = send(sock, &szBuff[idx], nLeft, 0);
if (ret == 0)
break;
else if (ret == SOCKET_ERROR)
{
printf("send() failed: %d\n",
WSAGetLastError());
break;
}
nLeft -= ret;
idx += ret;
}
}
}
return 0;
}int main(int argc, char **argv)
{
WSADATA wsd;
SOCKET sListen,
sClient;
int iAddrSize;
HANDLE hThread;
DWORD dwThreadId;
struct sockaddr_in local,
client; ValidateArgs(argc, argv);
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("Failed to load Winsock!\n");
return 1;
}
sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sListen == SOCKET_ERROR)
{
printf("socket() failed: %d\n", WSAGetLastError());
return 1;
}
if (bInterface)
{
local.sin_addr.s_addr = inet_addr(szAddress);
if (local.sin_addr.s_addr == INADDR_NONE)
usage();
}
else
local.sin_addr.s_addr = htonl(INADDR_ANY);
local.sin_family = AF_INET;
local.sin_port = htons(iPort); if (bind(sListen, (struct sockaddr *)&local,
sizeof(local)) == SOCKET_ERROR)
{
printf("bind() failed: %d\n", WSAGetLastError());
return 1;
}
listen(sListen, 8);
while (1)
{
iAddrSize = sizeof(client);
sClient = accept(sListen, (struct sockaddr *)&client,
&iAddrSize);
if (sClient == INVALID_SOCKET)
{
printf("accept() failed: %d\n", WSAGetLastError());
break;
}
printf("Accepted client: %s:%d\n",
inet_ntoa(client.sin_addr), ntohs(client.sin_port)); hThread = CreateThread(NULL, 0, ClientThread,
(LPVOID)sClient, 0, &dwThreadId);
if (hThread == NULL)
{
printf("CreateThread() failed: %d\n", GetLastError());
break;
}
CloseHandle(hThread);
}
closesocket(sListen);
WSACleanup();
return 0;
}
客户端:
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_COUNT 20
#define DEFAULT_PORT 5150
#define DEFAULT_BUFFER 2048
#define DEFAULT_MESSAGE "This is a test of the emergency \
broadcasting system"char szServer[128],
szMessage[1024];
int iPort = DEFAULT_PORT;
DWORD dwCount = DEFAULT_COUNT;
BOOL bSendOnly = FALSE; 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':
if (strlen(argv[i]) > 3)
iPort = atoi(&argv[i][3]);
break;
case 's':
if (strlen(argv[i]) > 3)
strcpy(szServer, &argv[i][3]);
break;
case 'n':
if (strlen(argv[i]) > 3)
dwCount = atol(&argv[i][3]);
break;
case 'o':
bSendOnly = TRUE;
break;
default:
usage();
break;
}
}
}
}int main(int argc, char **argv)
{
WSADATA wsd;
SOCKET sClient;
char szBuffer[DEFAULT_BUFFER];
int ret,
i;
struct sockaddr_in server;
struct hostent *host = NULL;
ValidateArgs(argc, argv);
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("Failed to load Winsock library!\n");
return 1;
}
strcpy(szMessage, DEFAULT_MESSAGE);
sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sClient == INVALID_SOCKET)
{
printf("socket() failed: %d\n", WSAGetLastError());
return 1;
}
server.sin_family = AF_INET;
server.sin_port = htons(iPort);
server.sin_addr.s_addr = inet_addr(szServer);
if (server.sin_addr.s_addr == INADDR_NONE)
{
host = gethostbyname(szServer);
if (host == NULL)
{
printf("Unable to resolve server: %s\n", szServer);
return 1;
}
CopyMemory(&server.sin_addr, host->h_addr_list[0],
host->h_length);
}
if (connect(sClient, (struct sockaddr *)&server,
sizeof(server)) == SOCKET_ERROR)
{
printf("connect() failed: %d\n", WSAGetLastError());//这里就出错了
return 1;
}
for(i = 0; i < dwCount; i++)
{
ret = send(sClient, szMessage, strlen(szMessage), 0);
......
.....//这里是发送数据的for循环,因为发贴字数有限就省去了
}
closesocket(sClient); WSACleanup();
return 0;
}
服务器端:
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_PORT 5150
#define DEFAULT_BUFFER 4096int iPort = DEFAULT_PORT;
BOOL bInterface = FALSE,
bRecvOnly = FALSE;
char szAddress[128]; void usage()
{
printf("usage: server [-p:x] [-i:IP] [-o]\n\n");
printf(" -p:x Port number to listen on\n");
printf(" -i:str Interface to listen on\n");
printf(" -o Don't echo the data back\n\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':
iPort = atoi(&argv[i][3]);
break;
case 'i':
bInterface = TRUE;
if (strlen(argv[i]) > 3)
strcpy(szAddress, &argv[i][3]);
break;
case 'o':
bRecvOnly = TRUE;
break;
default:
usage();
break;
}
}
}
}DWORD WINAPI ClientThread(LPVOID lpParam)
{
SOCKET sock=(SOCKET)lpParam;
char szBuff[DEFAULT_BUFFER];
int ret,
nLeft,
idx; while(1)
{
ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
if (ret == 0)
break;
else if (ret == SOCKET_ERROR)
{
printf("recv() failed: %d\n", WSAGetLastError());
break;
}
szBuff[ret] = '\0';
printf("RECV: '%s'\n", szBuff);
if (!bRecvOnly)
{
nLeft = ret;
idx = 0;
while(nLeft > 0)
{
ret = send(sock, &szBuff[idx], nLeft, 0);
if (ret == 0)
break;
else if (ret == SOCKET_ERROR)
{
printf("send() failed: %d\n",
WSAGetLastError());
break;
}
nLeft -= ret;
idx += ret;
}
}
}
return 0;
}int main(int argc, char **argv)
{
WSADATA wsd;
SOCKET sListen,
sClient;
int iAddrSize;
HANDLE hThread;
DWORD dwThreadId;
struct sockaddr_in local,
client; ValidateArgs(argc, argv);
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("Failed to load Winsock!\n");
return 1;
}
sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sListen == SOCKET_ERROR)
{
printf("socket() failed: %d\n", WSAGetLastError());
return 1;
}
if (bInterface)
{
local.sin_addr.s_addr = inet_addr(szAddress);
if (local.sin_addr.s_addr == INADDR_NONE)
usage();
}
else
local.sin_addr.s_addr = htonl(INADDR_ANY);
local.sin_family = AF_INET;
local.sin_port = htons(iPort); if (bind(sListen, (struct sockaddr *)&local,
sizeof(local)) == SOCKET_ERROR)
{
printf("bind() failed: %d\n", WSAGetLastError());
return 1;
}
listen(sListen, 8);
while (1)
{
iAddrSize = sizeof(client);
sClient = accept(sListen, (struct sockaddr *)&client,
&iAddrSize);
if (sClient == INVALID_SOCKET)
{
printf("accept() failed: %d\n", WSAGetLastError());
break;
}
printf("Accepted client: %s:%d\n",
inet_ntoa(client.sin_addr), ntohs(client.sin_port)); hThread = CreateThread(NULL, 0, ClientThread,
(LPVOID)sClient, 0, &dwThreadId);
if (hThread == NULL)
{
printf("CreateThread() failed: %d\n", GetLastError());
break;
}
CloseHandle(hThread);
}
closesocket(sListen);
WSACleanup();
return 0;
}
客户端:
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_COUNT 20
#define DEFAULT_PORT 5150
#define DEFAULT_BUFFER 2048
#define DEFAULT_MESSAGE "This is a test of the emergency \
broadcasting system"char szServer[128],
szMessage[1024];
int iPort = DEFAULT_PORT;
DWORD dwCount = DEFAULT_COUNT;
BOOL bSendOnly = FALSE; 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':
if (strlen(argv[i]) > 3)
iPort = atoi(&argv[i][3]);
break;
case 's':
if (strlen(argv[i]) > 3)
strcpy(szServer, &argv[i][3]);
break;
case 'n':
if (strlen(argv[i]) > 3)
dwCount = atol(&argv[i][3]);
break;
case 'o':
bSendOnly = TRUE;
break;
default:
usage();
break;
}
}
}
}int main(int argc, char **argv)
{
WSADATA wsd;
SOCKET sClient;
char szBuffer[DEFAULT_BUFFER];
int ret,
i;
struct sockaddr_in server;
struct hostent *host = NULL;
ValidateArgs(argc, argv);
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("Failed to load Winsock library!\n");
return 1;
}
strcpy(szMessage, DEFAULT_MESSAGE);
sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sClient == INVALID_SOCKET)
{
printf("socket() failed: %d\n", WSAGetLastError());
return 1;
}
server.sin_family = AF_INET;
server.sin_port = htons(iPort);
server.sin_addr.s_addr = inet_addr(szServer);
if (server.sin_addr.s_addr == INADDR_NONE)
{
host = gethostbyname(szServer);
if (host == NULL)
{
printf("Unable to resolve server: %s\n", szServer);
return 1;
}
CopyMemory(&server.sin_addr, host->h_addr_list[0],
host->h_length);
}
if (connect(sClient, (struct sockaddr *)&server,
sizeof(server)) == SOCKET_ERROR)
{
printf("connect() failed: %d\n", WSAGetLastError());//这里就出错了
return 1;
}
for(i = 0; i < dwCount; i++)
{
ret = send(sClient, szMessage, strlen(szMessage), 0);
......
.....//这里是发送数据的for循环,因为发贴字数有限就省去了
}
closesocket(sClient); WSACleanup();
return 0;
}
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