14
(struct sockaddr *)&serverさんはここにどのように記述できますか？大きな構造体を小さな構造体にキャストすることは可能ですか？構造体を別の構造体にキャストすることは可能ですか？
// IPv4 AF_INET sockets:
struct sockaddr_in {
short sin_family; // e.g. AF_INET, AF_INET6
unsigned short sin_port; // e.g. htons(3490)
struct in_addr sin_addr; // see struct in_addr, below
char sin_zero[8]; // zero this if you want to
};
struct in_addr {
unsigned long s_addr; // load with inet_pton()
};
struct sockaddr {
unsigned short sa_family; // address family, AF_xxx
char sa_data[14]; // 14 bytes of protocol address
};
これは、メインプログラムは次のとおりです：
int main(int argc , char *argv[])
{
int socket_desc;
struct sockaddr_in server;
//Create socket
socket_desc = socket(AF_INET , SOCK_STREAM , 0);
if (socket_desc == -1)
{
printf("Could not create socket");
}
server.sin_addr.s_addr = inet_addr("74.125.235.20");
server.sin_family = AF_INET;
server.sin_port = htons(80);
//Connect to remote server
if (connect(socket_desc , (struct sockaddr *)&server , sizeof(server)) < 0)
{
puts("connect error");
return 1;
}
puts("Connected");
return 0;
}
related http://stackoverflow.com/questions/3995940/casting-one-c-structure-into-another || http://stackoverflow.com/questions/3766229/casting-one-struct-pointer-to-other-c –