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annotate packages/net/common/current/src/inet_pton.c @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // src/inet_pton.c
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4 //
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5 //==========================================================================
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6 // ####BSDCOPYRIGHTBEGIN####
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7 // -------------------------------------------
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8 // This file is part of eCos, the Embedded Configurable Operating System.
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9 //
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10 // Portions of this software may have been derived from FreeBSD, OpenBSD,
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11 // or other sources, and if so are covered by the appropriate copyright
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12 // and license included herein.
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13 //
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14 // Portions created by the Free Software Foundation are
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15 // Copyright (C) 2002 Free Software Foundation, Inc.
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16 // -------------------------------------------
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17 // ####BSDCOPYRIGHTEND####
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18 //==========================================================================
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19
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20 /* $KAME: inet_pton.c,v 1.5 2001/08/20 02:32:40 itojun Exp $ */
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21
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22 /*
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23 * Copyright (c) 1996,1999 by Internet Software Consortium.
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24 *
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25 * Permission to use, copy, modify, and distribute this software for any
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26 * purpose with or without fee is hereby granted, provided that the above
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27 * copyright notice and this permission notice appear in all copies.
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28 *
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29 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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30 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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31 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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32 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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33 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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34 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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35 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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36 * SOFTWARE.
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37 */
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38
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39 //#if defined(LIBC_SCCS) && !defined(lint)
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40 //static char rcsid[] = "$Id: inet_pton.c,v 1.3 2002/02/20 17:39:39 gthomas Exp $";
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41 //#endif /* LIBC_SCCS and not lint */
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42
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43 //#ifdef HAVE_CONFIG_H
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44 //#include <config.h>
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45 //#endif
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46
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47 #include <sys/param.h>
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48 #include <sys/types.h>
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49 #include <sys/socket.h>
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50 #include <netinet/in.h>
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51 #include <arpa/inet.h>
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52 #include <arpa/nameser.h>
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53 #include <string.h>
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54 #include <errno.h>
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55
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56 //#ifndef HAVE_PORTABLE_PROTOTYPE
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57 //#include "cdecl_ext.h"
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58 //#endif
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59
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60 //#ifndef HAVE_U_INT16_T
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61 //#include "bittypes.h"
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62 //#endif
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63
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64 //#if !(defined(HAVE_INADDRSZ) && defined(HAVE_IN6ADDRSZ))
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65 //#include "addrsize.h"
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66 //#endif
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67
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68 #define NS_INADDRSZ 4 /* IPv4 T_A */
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69 #define NS_IN6ADDRSZ 16 /* IPv6 T_AAAA */
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70
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71 #ifndef NS_INADDRSZ
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72 #define NS_INADDRSZ INADDRSZ
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73 #endif
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74 #ifndef NS_IN6ADDRSZ
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75 #define NS_IN6ADDRSZ IN6ADDRSZ
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76 #endif
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77 #ifndef NS_INT16SZ
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78 #define NS_INT16SZ sizeof(u_int16_t)
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79 #endif
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80
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81 /*
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82 * WARNING: Don't even consider trying to compile this on a system where
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83 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
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84 */
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85
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86 static int inet_pton4 __P((const char *src, u_char *dst));
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87 #ifdef CYGPKG_NET_INET6
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88 static int inet_pton6 __P((const char *src, u_char *dst));
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89 #endif
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90
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91 /* int
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92 * inet_pton(af, src, dst)
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93 * convert from presentation format (which usually means ASCII printable)
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94 * to network format (which is usually some kind of binary format).
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95 * return:
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96 * 1 if the address was valid for the specified address family
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97 * 0 if the address wasn't valid (`dst' is untouched in this case)
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98 * -1 if some other error occurred (`dst' is untouched in this case, too)
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99 * author:
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100 * Paul Vixie, 1996.
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101 */
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102 int
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103 inet_pton(int af, const char *src, void *dst)
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104 {
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105 switch (af) {
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106 case AF_INET:
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107 return (inet_pton4(src, dst));
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108 #ifdef CYGPKG_NET_INET6
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109 case AF_INET6:
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110 return (inet_pton6(src, dst));
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111 #endif
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112 default:
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113 errno = EAFNOSUPPORT;
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114 return (-1);
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115 }
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116 /* NOTREACHED */
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117 }
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118
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119 /* int
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120 * inet_pton4(src, dst)
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121 * like inet_aton() but without all the hexadecimal and shorthand.
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122 * return:
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123 * 1 if `src' is a valid dotted quad, else 0.
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124 * notice:
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125 * does not touch `dst' unless it's returning 1.
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126 * author:
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127 * Paul Vixie, 1996.
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128 */
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129 static int
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130 inet_pton4(const char *src, u_char *dst)
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131 {
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132 static const char digits[] = "0123456789";
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133 int saw_digit, octets, ch;
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134 u_char tmp[NS_INADDRSZ], *tp;
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135
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136 saw_digit = 0;
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137 octets = 0;
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138 *(tp = tmp) = 0;
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139 while ((ch = *src++) != '\0') {
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140 const char *pch;
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141
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142 if ((pch = strchr(digits, ch)) != NULL) {
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143 u_int new = *tp * 10 + (pch - digits);
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144
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145 if (new > 255)
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146 return (0);
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147 *tp = new;
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148 if (! saw_digit) {
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149 if (++octets > 4)
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150 return (0);
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151 saw_digit = 1;
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152 }
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153 } else if (ch == '.' && saw_digit) {
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154 if (octets == 4)
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155 return (0);
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156 *++tp = 0;
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157 saw_digit = 0;
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158 } else
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159 return (0);
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160 }
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161 if (octets < 4)
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162 return (0);
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163 memcpy(dst, tmp, NS_INADDRSZ);
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164 return (1);
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165 }
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166
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167 #ifdef CYGPKG_NET_INET6
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168 /* int
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169 * inet_pton6(src, dst)
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170 * convert presentation level address to network order binary form.
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171 * return:
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172 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
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173 * notice:
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174 * (1) does not touch `dst' unless it's returning 1.
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175 * (2) :: in a full address is silently ignored.
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176 * credit:
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177 * inspired by Mark Andrews.
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178 * author:
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179 * Paul Vixie, 1996.
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180 */
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181 static int
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182 inet_pton6(const char *src, u_char *dst)
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183 {
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184 static const char xdigits_l[] = "0123456789abcdef",
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185 xdigits_u[] = "0123456789ABCDEF";
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186 u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
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187 const char *xdigits, *curtok;
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188 int ch, saw_xdigit;
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189 u_int val;
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190
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191 memset((tp = tmp), '\0', NS_IN6ADDRSZ);
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192 endp = tp + NS_IN6ADDRSZ;
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193 colonp = NULL;
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194 /* Leading :: requires some special handling. */
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195 if (*src == ':')
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196 if (*++src != ':')
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197 return (0);
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198 curtok = src;
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199 saw_xdigit = 0;
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200 val = 0;
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201 while ((ch = *src++) != '\0') {
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202 const char *pch;
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203
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204 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
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205 pch = strchr((xdigits = xdigits_u), ch);
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206 if (pch != NULL) {
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207 val <<= 4;
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208 val |= (pch - xdigits);
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209 if (val > 0xffff)
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210 return (0);
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211 saw_xdigit = 1;
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212 continue;
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213 }
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214 if (ch == ':') {
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215 curtok = src;
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216 if (!saw_xdigit) {
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217 if (colonp)
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218 return (0);
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219 colonp = tp;
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220 continue;
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221 } else if (*src == '\0') {
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222 return (0);
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223 }
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224 if (tp + NS_INT16SZ > endp)
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225 return (0);
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226 *tp++ = (u_char) (val >> 8) & 0xff;
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227 *tp++ = (u_char) val & 0xff;
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228 saw_xdigit = 0;
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229 val = 0;
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230 continue;
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231 }
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232 if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
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233 inet_pton4(curtok, tp) > 0) {
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234 tp += NS_INADDRSZ;
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235 saw_xdigit = 0;
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236 break; /* '\0' was seen by inet_pton4(). */
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237 }
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238 return (0);
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239 }
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240 if (saw_xdigit) {
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241 if (tp + NS_INT16SZ > endp)
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242 return (0);
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243 *tp++ = (u_char) (val >> 8) & 0xff;
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244 *tp++ = (u_char) val & 0xff;
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245 }
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246 if (colonp != NULL) {
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247 /*
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248 * Since some memmove()'s erroneously fail to handle
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249 * overlapping regions, we'll do the shift by hand.
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250 */
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251 const int n = tp - colonp;
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252 int i;
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253
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254 if (tp == endp)
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255 return (0);
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256 for (i = 1; i <= n; i++) {
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257 endp[- i] = colonp[n - i];
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258 colonp[n - i] = 0;
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259 }
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260 tp = endp;
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261 }
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262 if (tp != endp)
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263 return (0);
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264 memcpy(dst, tmp, NS_IN6ADDRSZ);
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265 return (1);
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266 }
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267 #endif /*INET6*/