Winsock用UDP的socket，无法绑定IP端口，老是10049错误，“在其上下文中，该请求的地址无效”。怎么解决？谁能给个例子

[stoat]

Winsock用UDP的socket，无法绑定IP端口，老是10049错误，“在其上下文中，该请求的地址无效”。怎么解决？

[rookieme]

代码？

[stoat]

WSAData wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);

SOCKADDR_IN local;
SOCKADDR_IN dest;
SOCKADDR_IN from;

char send[8] = {"1234567"};
int len = 8;
char recv[1024] = {0};
int recvLen = 1024;
int rc;
int a;

int addLen = sizeof(SOCKADDR_IN);

SOCKET sock = socket(AF_INET,SOCK_DGRAM,0);

dest.sin_family = AF_INET;
dest.sin_port = htons((short)5000);
dest.sin_addr.s_addr = inet_addr("192.168.3.222");

local.sin_family = AF_INET;
local.sin_port = htons((short)6);
local.sin_addr.s_addr = inet_addr("INADDR_ANY");//INADDR_ANY

rc = bind(sock, (sockaddr*)&local, sizeof(SOCKADDR_IN));
if (rc == SOCKET_ERROR)
{
a = WSAGetLastError();
}

rc = sendto(sock, send, len, 0, (sockaddr*)&dest, sizeof(SOCKADDR_IN));
if (rc == SOCKET_ERROR)
{
a = WSAGetLastError();
}

rc = recvfrom(sock, recv, recvLen, 0, (sockaddr*)&from, &addLen);
if (rc == SOCKET_ERROR)
{
a = WSAGetLastError();
}

WSACleanup();

[rookieme]

改了３处 :
SOCKADDR_IN local;
SOCKADDR_IN dest;
SOCKADDR_IN from;

char send[8] = {"1234567"};
int len = 8;
char recv[1024] = {0};
int recvLen = 1024;
int rc;
int a;

int addLen = 0;//sizeof(SOCKADDR_IN);一处

SOCKET sock = socket(AF_INET,SOCK_DGRAM,IPPROTO_IP);//0);二处

dest.sin_family = AF_INET;
dest.sin_port = htons((short)5000);
dest.sin_addr.s_addr = inet_addr("192.168.3.222");

local.sin_family = AF_INET;
local.sin_port = htons((short)0);
local.sin_addr.s_addr = INADDR_ANY;//三处

rc = bind(sock, (sockaddr*)&local, sizeof(SOCKADDR_IN));
if (rc == SOCKET_ERROR)
{
a = WSAGetLastError();
}

rc = sendto(sock, send, len, 0, (sockaddr*)&dest, sizeof(SOCKADDR_IN));
if (rc == SOCKET_ERROR)
{
a = WSAGetLastError();
}

rc = recvfrom(sock, recv, recvLen, 0, (LPSOCKADDR)&from, &addLen);
if (rc == SOCKET_ERROR)
{
a = WSAGetLastError();
}

[内存泄漏]

local.sin_port = htons((short)0); ??????? 换1024以后的别的端口试试..

[stoat]

呵呵，就是这里影响到bind了，谢了！
local.sin_addr.s_addr = INADDR_ANY;//三处

标准的写法是 local.sin_addr.s_addr = htonl(INADDR_ANY); 不过INADDR_ANY就是0，转不转字节序都一样