The OpenNET Project / Index page

[ новости /+++ | форум | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

freeifaddrs (3)
  • >> freeifaddrs (3) ( FreeBSD man: Библиотечные вызовы )

  • BSD mandoc
     

    NAME

    
    
    getifaddrs
    
     - get interface addresses
    
     
    

    SYNOPSIS

       #include <sys/types.h>
       #include <sys/socket.h>
       #include <ifaddrs.h>
    int getifaddrs (struct ifaddrs **ifap);
    void freeifaddrs (struct ifaddrs *ifp);
     

    DESCRIPTION

    The getifaddrs ();
    function stores a reference to a linked list of the network interfaces on the local machine in the memory referenced by Fa ifap . The list consists of ifaddrs structures, as defined in the include file In ifaddrs.h . The ifaddrs structure contains at least the following entries:
        struct ifaddrs   *ifa_next;         /* Pointer to next struct */
        char             *ifa_name;         /* Interface name */
        u_int             ifa_flags;        /* Interface flags */
        struct sockaddr  *ifa_addr;         /* Interface address */
        struct sockaddr  *ifa_netmask;      /* Interface netmask */
        struct sockaddr  *ifa_broadaddr;    /* Interface broadcast address */
        struct sockaddr  *ifa_dstaddr;      /* P2P interface destination */
        void             *ifa_data;         /* Address specific data */
    

    The ifa_next field contains a pointer to the next structure on the list. This field is NULL in last structure on the list.

    The ifa_name field contains the interface name.

    The ifa_flags field contains the interface flags, as set by ifconfig(8) utility.

    The ifa_addr field references either the address of the interface or the link level address of the interface, if one exists, otherwise it is NULL. (The sa_family field of the ifa_addr field should be consulted to determine the format of the ifa_addr address.)

    The ifa_netmask field references the netmask associated with ifa_addr if one is set, otherwise it is NULL.

    The ifa_broadaddr field, which should only be referenced for non-P2P interfaces, references the broadcast address associated with ifa_addr if one exists, otherwise it is NULL.

    The ifa_dstaddr field references the destination address on a P2P interface, if one exists, otherwise it is NULL.

    The ifa_data field references address family specific data. For AF_LINK addresses it contains a pointer to the Fa struct if_data (as defined in include file In net/if.h ) which contains various interface attributes and statistics. For all other address families, it contains a pointer to the Fa struct ifa_data (as defined in include file In net/if.h ) which contains per-address interface statistics.

    The data returned by getifaddrs ();
    is dynamically allocated and should be freed using freeifaddrs ();
    when no longer needed.  

    RETURN VALUES

    Rv -std getifaddrs  

    ERRORS

    The getifaddrs ();
    may fail and set errno for any of the errors specified for the library routines ioctl(2), socket(2), malloc(3) or sysctl(3).  

    SEE ALSO

    ioctl(2), socket(2), sysctl(3), networking(4), ifconfig(8)  

    HISTORY

    The implementation first appeared in BSDi Bs x .  

    BUGS

    If both    #include <net/if.h>
    and    #include <ifaddrs.h>
    are being included,    #include <net/if.h>
    must be included before In ifaddrs.h .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    HISTORY
    BUGS


    Поиск по тексту MAN-ов: 




    Партнёры:
    PostgresPro
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2024 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру