HW12/socket_wrapper.h

60 lines
1.3 KiB
C
Raw Permalink Normal View History

2020-12-04 08:06:26 +09:00
#ifndef _SOCKET_WRAPPER_H_
#define _SOCKET_WRAPPER_H_
#include <stdint.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
2020-12-04 15:56:21 +09:00
#include <netdb.h>
2020-12-04 08:06:26 +09:00
static const size_t DEFAULT_BUF_SIZE = 4096;
static const size_t MINIMUM_BUF_SIZE = 1024;
enum{
RES_OK = 0,
RES_ERR = 1,
RES_USR_ERR = 2
};
#pragma pack(push,1)
struct ReadOp{
uint16_t file_url_size;/* strlen(data) */
uint16_t padding0;
};
struct TransferResult{
int16_t res;
int16_t error_msg_size;
2020-12-14 20:30:46 +09:00
int64_t file_size;
2020-12-04 08:06:26 +09:00
int32_t err_number; /*errno*/
};
#pragma pack(pop)
2020-12-04 14:25:10 +09:00
/**
* find buffer size from sock
* thread safe
*/
2020-12-04 08:06:26 +09:00
int getBufferSizeFrom(int sock);
2020-12-04 14:25:10 +09:00
/**
* return -2 if timeout occur.
* otherwise, implement equal to 'recv'.
* `timeout` unit is second.
* thread safe
2020-12-04 08:06:26 +09:00
*/
ssize_t timeout_recv(int fd,void * buf,size_t n,int timeout);
2020-12-04 15:56:21 +09:00
/**
2020-12-04 14:25:10 +09:00
* recieve data to buf until all bytes.
* thread safe
2020-12-04 08:06:26 +09:00
*/
ssize_t recv_until_byte(int fd,void * buf, size_t n,int timeout);
2020-12-04 15:56:21 +09:00
/**
* find sockaddr by hostname
* it perform like `gethostbyname`
* hostname could not be greater than _SC_HOST_NAME_MAX.
* return 0 on success, otherwise return ecode.
* ecode can be converted to string by `gai_strerror`.
*/
int getsockaddrbyname(int domain,int type, int protocol, const char * hostname_str, struct sockaddr * retaddr);
2020-12-04 08:06:26 +09:00
#endif