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53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* Copyright (c) 2003-2004, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2018, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#include "orconfig.h"
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#include "lib/cc/torint.h"
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#include "lib/net/ipv4.h"
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#include "lib/string/printf.h"
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#include "lib/string/scanf.h"
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef _WIN32
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#include <winsock2.h>
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#endif
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/** Set *addr to the IP address (in dotted-quad notation) stored in *str.
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* Return 1 on success, 0 if *str is badly formatted.
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* (Like inet_aton(str,addr), but works on Windows and Solaris.)
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*/
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int
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tor_inet_aton(const char *str, struct in_addr* addr)
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{
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unsigned a,b,c,d;
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char more;
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if (tor_sscanf(str, "%3u.%3u.%3u.%3u%c", &a,&b,&c,&d,&more) != 4)
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return 0;
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if (a > 255) return 0;
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if (b > 255) return 0;
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if (c > 255) return 0;
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if (d > 255) return 0;
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addr->s_addr = htonl((a<<24) | (b<<16) | (c<<8) | d);
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return 1;
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}
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/** Given an IPv4 in_addr struct *<b>in</b> (in network order, as usual),
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* write it as a string into the <b>buf_len</b>-byte buffer in
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* <b>buf</b>. Returns a non-negative integer on success.
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* Returns -1 on failure.
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*/
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int
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tor_inet_ntoa(const struct in_addr *in, char *buf, size_t buf_len)
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{
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uint32_t a = ntohl(in->s_addr);
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return tor_snprintf(buf, buf_len, "%d.%d.%d.%d",
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(int)(uint8_t)((a>>24)&0xff),
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(int)(uint8_t)((a>>16)&0xff),
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(int)(uint8_t)((a>>8 )&0xff),
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(int)(uint8_t)((a )&0xff));
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}
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