INET_CIDR(3) FreeBSD Library Functions Manual INET_CIDR(3)
NNAAMMEE
iinneett__cciiddrr__nnttoopp, iinneett__cciiddrr__ppttoonn -- network translation routines
SSYYNNOOPPSSIISS
##iinncclluuddee <<ssyyss//ttyyppeess..hh>>
##iinncclluuddee <<ssyyss//ssoocckkeett..hh>>
##iinncclluuddee <<nneettiinneett//iinn..hh>>
##iinncclluuddee <<aarrppaa//iinneett..hh>>
iinneett__cciiddrr__nnttoopp(_i_n_t _a_f, _c_o_n_s_t _v_o_i_d _*_s_r_c, _i_n_t _b_i_t_s, _c_h_a_r _*_d_s_t,
_s_i_z_e___t _s_i_z_e);
iinneett__cciiddrr__ppttoonn(_i_n_t _a_f, _c_o_n_s_t _c_h_a_r _*_s_r_c, _v_o_i_d _*_d_s_t, _i_n_t _*_b_i_t_s);
DDEESSCCRRIIPPTTIIOONN
These routines are used for converting addresses to and from network and
presentation forms with CIDR (Classless Inter-Domain Routing) representa-
tion, embedded net mask.
130.155.16.1/20
iinneett__cciiddrr__nnttoopp() converts an address from network to presentation format.
_a_f describes the type of address that is being passed in _s_r_c. Currently
only AF_INET is supported.
_s_r_c is an address in network byte order, its length is determined from
_a_f.
_b_i_t_s specifies the number of bits in the netmask unless it is -1 in which
case the CIDR representation is omitted.
_d_s_t is a caller supplied buffer of at least _s_i_z_e bytes.
iinneett__cciiddrr__nnttoopp() returns _d_s_t on success or NULL. Check errno for reason.
iinneett__cciiddrr__ppttoonn() converts and address from presentation format, with
optional CIDR reperesentation, to network format. The resulting address
is zero filled if there were insufficint bits in _s_r_c.
_a_f describes the type of address that is being passed in via _s_r_c and
determines the size of _d_s_t.
_s_r_c is an address in presentation format.
_b_i_t_s returns the number of bits in the netmask or -1 if a CIDR represen-
tation was not supplied.
iinneett__cciiddrr__ppttoonn() returns 0 on succces or -1 on error. Check errno for
reason. ENOENT indicates an invalid netmask.
SSEEEE AALLSSOO
intro(2)
4th Berkeley Distribution October 19, 1998 4th Berkeley Distribution
