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/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
* This file is part of the Linux-8086 C library and is distributed
* under the GNU Library General Public License.
*/
/*
* Manuel Novoa III Dec 2000
*
* Converted to use my new (un)signed long (long) to string routines, which
* are smaller than the previous functions and don't require static buffers.
* In the process, removed the reference to strcat and cut object size of
* inet_ntoa in half (from 190 bytes down to 94).
*
* Manuel Novoa III Feb 2002
*
* Changed to use _int10tostr.
*/
#define _GNU_SOURCE
#define __FORCE_GLIBC
#include <features.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <netinet/in.h>
#include <bits/uClibc_uintmaxtostr.h>
#ifdef L_inet_aton
/*
* More undocumented inet_aton features.
* (read: uclibc doesnt support but glibc does)
* http://www.mkssoftware.com/docs/man3/inet_aton.3.asp
*
* *cp can take the form of:
* a.b.c.d - {a,b,c,d} -> 1 byte
* a.b.c - {a,b} -> 1 byte {c} -> 2 bytes
* a.b - {a} -> 1 byte {b} -> 3 bytes
* a - {a} -> 4 bytes
*
* Each part may be decimal, octal, or hexadecimal as in ISO C.
* 0x or 0X -> hexadecimal
* leading 0 -> octal
* all else -> decimal
*/
int inet_aton(const char *cp, struct in_addr *addrptr)
{
in_addr_t addr;
int value;
int part;
addr = 0;
for (part = 1; part <= 4; part++) {
if (!isdigit(*cp))
return 0;
value = 0;
while (isdigit(*cp)) {
value *= 10;
value += *cp++ - '0';
if (value > 255)
return 0;
}
if (part < 4) {
if (*cp++ != '.')
return 0;
} else {
char c = *cp++;
if (c != '\0' && !isspace(c))
return 0;
}
addr <<= 8;
addr |= value;
}
/* W. Richard Stevens in his book UNIX Network Programming,
* Volume 1, second edition, on page 71 says:
*
* An undocumented feature of inet_aton is that if addrptr is
* a null pointer, the function still performs it validation
* of the input string, but does not store the result.
*/
if (addrptr) {
addrptr->s_addr = htonl(addr);
}
return 1;
}
libc_hidden_proto(inet_aton)
libc_hidden_def(inet_aton)
#endif
#ifdef L_inet_addr
#include <arpa/inet.h>
libc_hidden_proto(inet_aton)
in_addr_t inet_addr(const char *cp)
{
struct in_addr a;
if (!inet_aton(cp, &a))
return INADDR_NONE;
else
return a.s_addr;
}
libc_hidden_proto(inet_addr)
libc_hidden_def(inet_addr)
#endif
#ifdef L_inet_ntoa
#define INET_NTOA_MAX_LEN 16 /* max 12 digits + 3 '.'s + 1 nul */
char *inet_ntoa_r(struct in_addr in, char buf[INET_NTOA_MAX_LEN])
{
in_addr_t addr = ntohl(in.s_addr);
int i;
char *p, *q;
q = 0;
p = buf + INET_NTOA_MAX_LEN - 1; /* cannot use sizeof(buf) here */
for (i=0 ; i < 4 ; i++ ) {
p = _int10tostr(p, addr & 0xff) - 1;
addr >>= 8;
if (q) {
*q = '.';
}
q = p;
}
return p+1;
}
libc_hidden_proto(inet_ntoa_r)
libc_hidden_def(inet_ntoa_r)
char *inet_ntoa(struct in_addr in)
{
static char buf[INET_NTOA_MAX_LEN];
return(inet_ntoa_r(in, buf));
}
libc_hidden_proto(inet_ntoa)
libc_hidden_def(inet_ntoa)
#endif
#ifdef L_inet_makeaddr
/* for some reason it does not remove the jump relocation */
libc_hidden_proto(memmove)
/*
* Formulate an Internet address from network + host. Used in
* building addresses stored in the ifnet structure.
*/
struct in_addr inet_makeaddr(in_addr_t net, in_addr_t host)
{
in_addr_t addr;
if (net < 128)
addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
else if (net < 65536)
addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
else if (net < 16777216UL)
addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
else
addr = net | host;
addr = htonl(addr);
return (*(struct in_addr *)&addr);
}
libc_hidden_proto(inet_makeaddr)
libc_hidden_def(inet_makeaddr)
#endif
#ifdef L_inet_lnaof
/*
* Return the local network address portion of an
* internet address; handles class a/b/c network
* number formats.
*/
in_addr_t inet_lnaof(struct in_addr in)
{
in_addr_t i = ntohl(in.s_addr);
if (IN_CLASSA(i))
return ((i)&IN_CLASSA_HOST);
else if (IN_CLASSB(i))
return ((i)&IN_CLASSB_HOST);
else
return ((i)&IN_CLASSC_HOST);
}
#endif
#ifdef L_inet_netof
/*
* Return the network number from an internet
* address; handles class a/b/c network #'s.
*/
in_addr_t
inet_netof(struct in_addr in)
{
in_addr_t i = ntohl(in.s_addr);
if (IN_CLASSA(i))
return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
else if (IN_CLASSB(i))
return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
else
return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
}
libc_hidden_proto(inet_netof)
libc_hidden_def(inet_netof)
#endif
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