GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.1 |
|
 |
ether_ntoa(3) |
 |
ether_aton, ether_ntoa, ether_ntohost, ether_hostton, ether_line, ether_ntoa_r, ether_aton_r − Ethernet address manipulation routines
#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);
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 zeroes. 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 non-zero if it cannot be found.
The ether_hostton() function maps a hostname to the corresponding Ethernet address in /etc/ethers and returns non-zero 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 non-zero if it cannot be parsed. The buffer pointed to by hostname must be sufficiently long, e.g., have the same length as line.
The functions ether_ntoa_r() and ether_aton_r() are re-entrant threadsafe 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 {
u_int8_t ether_addr_octet[6];
}
The glibc 2.2.5 implementation of ether_line() is broken.
4.3BSD, SunOS
ethers(5)
|
ether_ntoa(3) | |