`htonl.3p` ( 3 )

преобразовывать значения между порядком байтов хоста и сети (convert values between host and network byte order)

Пролог (Prolog)

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

Имя (Name)

htonl, htons, ntohl, ntohs — convert values between host and network byte order

Синопсис (Synopsis)

#include <arpa/inet.h>

uint32_t htonl(uint32_t hostlong); uint16_t htons(uint16_t hostshort); uint32_t ntohl(uint32_t netlong); uint16_t ntohs(uint16_t netshort);

Описание (Description)

These functions shall convert 16-bit and 32-bit quantities between network byte order and host byte order.

On some implementations, these functions are defined as macros.

The uint32_t and uint16_t types are defined in <inttypes.h>.

Возвращаемое значение (Return value)

The htonl() and htons() functions shall return the argument value converted from host to network byte order.

The ntohl() and ntohs() functions shall return the argument value converted from network to host byte order.

Ошибки (Error)

No errors are defined.

The following sections are informative.

Примеры (Examples)

None.

Использование в приложениях (Application usage)

These functions are most often used in conjunction with IPv4 addresses and ports as returned by gethostent() and getservent().

Обоснование (Rationale)

None.

Будущие направления (Future directions)