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Any one could describe how (struct sockaddr *)&server works here? Is it possible to cast bigger struct to smaller struct? See these structs: // 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 }; This is the main program: 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; }

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