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ether_hostton(3) [bsd man page]

ETHER_ATON(3)						     Linux Programmer's Manual						     ETHER_ATON(3)

NAME
ether_aton, ether_ntoa, ether_ntohost, ether_hostton, ether_line, ether_ntoa_r, ether_aton_r - Ethernet address manipulation routines SYNOPSIS
#include <netinet/ether.h> char *ether_ntoa(const struct ether_addr *addr); struct ether_addr *ether_aton(const char *asc); int ether_ntohost(char *hostname, const struct ether_addr *addr); int ether_hostton(const char *hostname, struct ether_addr *addr); int ether_line(const char *line, struct ether_addr *addr, char *hostname); /* GNU extensions */ char *ether_ntoa_r(const struct ether_addr *addr, char *buf); struct ether_addr *ether_aton_r(const char *asc, struct ether_addr *addr); DESCRIPTION
ether_aton() converts the 48-bit Ethernet host address asc from the standard hex-digits-and-colons notation into binary data in network byte order and returns a pointer to it in a statically allocated buffer, which subsequent calls will overwrite. ether_aton() returns NULL if the address is invalid. The ether_ntoa() function converts the Ethernet host address addr given in network byte order to a string in standard hex-digits-and-colons notation, omitting leading zeros. The string is returned in a statically allocated buffer, which subsequent calls will overwrite. The ether_ntohost() function maps an Ethernet address to the corresponding hostname in /etc/ethers and returns nonzero if it cannot be found. The ether_hostton() function maps a hostname to the corresponding Ethernet address in /etc/ethers and returns nonzero if it cannot be found. The ether_line() function parses a line in /etc/ethers format (ethernet address followed by whitespace followed by hostname; '#' introduces a comment) and returns an address and hostname pair, or nonzero if it cannot be parsed. The buffer pointed to by hostname must be suffi- ciently long, for example, have the same length as line. The functions ether_ntoa_r() and ether_aton_r() are reentrant thread-safe versions of ether_ntoa() and ether_aton() respectively, and do not use static buffers. The structure ether_addr is defined in <net/ethernet.h> as: struct ether_addr { uint8_t ether_addr_octet[6]; } ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------------------------------+---------------+-----------+ |Interface | Attribute | Value | +----------------------------------+---------------+-----------+ |ether_aton(), ether_ntoa() | Thread safety | MT-Unsafe | +----------------------------------+---------------+-----------+ |ether_ntohost(), ether_hostton(), | Thread safety | MT-Safe | |ether_line(), ether_ntoa_r(), | | | |ether_aton_r() | | | +----------------------------------+---------------+-----------+ CONFORMING TO
4.3BSD, SunOS. BUGS
In glibc 2.2.5 and earlier, the implementation of ether_line() is broken. SEE ALSO
ethers(5) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 ETHER_ATON(3)

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ETHER_ATON(3)						     Linux Programmer's Manual						     ETHER_ATON(3)

NAME
ether_aton, ether_ntoa, ether_ntohost, ether_hostton, ether_line, ether_ntoa_r, ether_aton_r - Ethernet address manipulation routines SYNOPSIS
#include <netinet/ether.h> char *ether_ntoa(const struct ether_addr *addr); struct ether_addr *ether_aton(const char *asc); int ether_ntohost(char *hostname, const struct ether_addr *addr); int ether_hostton(const char *hostname, struct ether_addr *addr); int ether_line(const char *line, struct ether_addr *addr, char *hostname); /* GNU extensions */ char *ether_ntoa_r(const struct ether_addr *addr, char *buf); struct ether_addr *ether_aton_r(const char *asc, struct ether_addr *addr); DESCRIPTION
ether_aton() converts the 48-bit Ethernet host address asc from the standard hex-digits-and-colons notation into binary data in network byte order and returns a pointer to it in a statically allocated buffer, which subsequent calls will overwrite. ether_aton() returns NULL if the address is invalid. The ether_ntoa() function converts the Ethernet host address addr given in network byte order to a string in standard hex-digits-and-colons notation, omitting leading zeros. The string is returned in a statically allocated buffer, which subsequent calls will overwrite. The ether_ntohost() function maps an Ethernet address to the corresponding hostname in /etc/ethers and returns nonzero if it cannot be found. The ether_hostton() function maps a hostname to the corresponding Ethernet address in /etc/ethers and returns nonzero if it cannot be found. The ether_line() function parses a line in /etc/ethers format (ethernet address followed by whitespace followed by hostname; '#' introduces a comment) and returns an address and hostname pair, or nonzero if it cannot be parsed. The buffer pointed to by hostname must be suffi- ciently long, for example, have the same length as line. The functions ether_ntoa_r() and ether_aton_r() are reentrant thread-safe versions of ether_ntoa() and ether_aton() respectively, and do not use static buffers. The structure ether_addr is defined in <net/ethernet.h> as: struct ether_addr { uint8_t ether_addr_octet[6]; } ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------------------------------+---------------+-----------+ |Interface | Attribute | Value | +----------------------------------+---------------+-----------+ |ether_aton(), ether_ntoa() | Thread safety | MT-Unsafe | +----------------------------------+---------------+-----------+ |ether_ntohost(), ether_hostton(), | Thread safety | MT-Safe | |ether_line(), ether_ntoa_r(), | | | |ether_aton_r() | | | +----------------------------------+---------------+-----------+ CONFORMING TO
4.3BSD, SunOS. BUGS
In glibc 2.2.5 and earlier, the implementation of ether_line() is broken. SEE ALSO
ethers(5) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 ETHER_ATON(3)

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