功能参数无效

时间:2011-06-02 16:08:27

标签: c sockets function-pointers

我正在编写一个使用套接字的C代码。我在windows和linux上使用它,所以我尝试动态地编写它。我写了两个函数来获取服务器/客户端套接字。我在编译时遇到错误:

debian:~/cross_socket# make
gcc *.c -Wall
i586-mingw32msvc-gcc *.c -Wall -lws2_32
socket.c: In function 'get_client_socket':
socket.c:28: warning: passing argument 3 of 'get_socket' from incompatible pointer type
socket.c:13: note: expected 'int (*)(SOCKET,  const struct sockaddr *, int)' but argument is of type 'int (*)(SOCKET,  const struct sockaddr *, int)'
socket.c: In function 'get_server_socket_addr':
socket.c:43: warning: passing argument 3 of 'get_socket' from incompatible pointer type
socket.c:13: note: expected 'int (*)(SOCKET,  const struct sockaddr *, int)' but argument is of type 'int (*)(SOCKET,  const struct sockaddr *, int)'

我的本​​地系统的gcc工作得很好,但是如果我使用mingw我得到这个错误?!? 它说: 我使用int (*)(SOCKET, const struct sockaddr *, int)代替int (*)(SOCKET, const struct sockaddr *, int) ...?

这里有相关代码:

inline SOCKET get_socket(uint16_t port, in_addr_t socket_in_addr, int (*create)(SOCKET, 
const struct sockaddr*, socklen_t)) {
        SOCKADDR_IN addr;
        SOCKET result_socket = GET_SOCKET;
        if (SOCKET_NOK(result_socket))
                return SOCKET_INIT_ERROR;
        memset(&addr, 0, sizeof(SOCKADDR_IN));
        addr.sin_family = AF_INET;
        addr.sin_port = htons(port);
        addr.sin_addr.s_addr = socket_in_addr;
        if (CONNECT_NOK(create(result_socket, (SOCKADDR*)&addr, sizeof(SOCKADDR))))
                return SOCKET_INIT_ERROR;
        return result_socket;
}

SOCKET get_client_socket(char* target, uint16_t port) {
        return get_socket(port, inet_addr(target), &connect);
/*      SOCKADDR_IN addr;
        SOCKET client_socket = GET_SOCKET;
        if (SOCKET_NOK(client_socket))
                return SOCKET_INIT_ERROR;
        memset(&addr,0,sizeof(SOCKADDR_IN));
        addr.sin_family = AF_INET;
        addr.sin_port = htons(port);
        addr.sin_addr.s_addr = inet_addr(target);
        if (CONNECT_NOK(connect(client_socket, (SOCKADDR*)&addr, sizeof(SOCKADDR))))
                return SOCKET_INIT_ERROR;
        return client_socket;*/
}

SOCKET get_server_socket_addr(uint16_t port, in_addr_t socket_in_addr) {
        return get_socket(port, socket_in_addr, &bind);
/*      SOCKADDR_IN addr;
        SOCKET server_socket = GET_SOCKET;
        if (SOCKET_NOK(server_socket))
                return SOCKET_INIT_ERROR;
        memset(&addr, 0, sizeof(SOCKADDR_IN));
        addr.sin_family = AF_INET;
        addr.sin_port = htons(port);
        addr.sin_addr.s_addr = socket_in_addr;
        if (CONNECT_NOK(bind(server_socket, (SOCKADDR*)&addr, sizeof(SOCKADDR_IN))))
                return SOCKET_INIT_ERROR;
        return server_socket;*/
}

有人有想法吗?

2 个答案:

答案 0 :(得分:0)

如果“connect”是一个函数,您应该将其作为“connect”传递,而不是“& connect”。函数的名称已经是指向它的指针。

答案 1 :(得分:0)

可能是错误的约定。

在Windows上,大多数API函数都定义为WINAPI,即__stdcall,a.k.a。PASCAL。即参数从左向右传递,并且被调用者清理堆栈。

OTOH默认编译调用约定为__cdecl

P.S。如果mingw打印出更详细的错误信息,那就太好了。