Mercurial > cpython-lru_cache-weakref

annotate Modules/getnameinfo.c @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents 86558ff7ce33
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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3 * All rights reserved.
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4 *
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5 * Redistribution and use in source and binary forms, with or without
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6 * modification, are permitted provided that the following conditions
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7 * are met:
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8 * 1. Redistributions of source code must retain the above copyright
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9 * notice, this list of conditions and the following disclaimer.
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10 * 2. Redistributions in binary form must reproduce the above copyright
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11 * notice, this list of conditions and the following disclaimer in the
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12 * documentation and/or other materials provided with the distribution.
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13 * 3. Neither the name of the project nor the names of its contributors
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14 * may be used to endorse or promote products derived from this software
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15 * without specific prior written permission.
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16 *
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17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 * SUCH DAMAGE.
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28 */
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29
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30 /*
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31 * Issues to be discussed:
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32 * - Thread safe-ness must be checked
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33 * - Return values. There seems to be no standard for return value (RFC2133)
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34 * but INRIA implementation returns EAI_xxx defined for getaddrinfo().
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35 */
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36
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37 #if 0
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38 #include <sys/types.h>
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39 #include <sys/socket.h>
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40 #include <netinet/in.h>
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41 #include <arpa/inet.h>
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42 #include <arpa/nameser.h>
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43 #include <netdb.h>
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44 #include <resolv.h>
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45 #include <string.h>
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46 #include <stddef.h>
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47
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48 #include "addrinfo.h"
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49 #endif
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50
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51 #define SUCCESS 0
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52 #define YES 1
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53 #define NO 0
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54
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55 static struct gni_afd {
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56 int a_af;
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57 int a_addrlen;
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58 int a_socklen;
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59 int a_off;
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60 } gni_afdl [] = {
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61 #ifdef ENABLE_IPV6
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62 {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),
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63 offsetof(struct sockaddr_in6, sin6_addr)},
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64 #endif
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65 {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),
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66 offsetof(struct sockaddr_in, sin_addr)},
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67 {0, 0, 0},
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68 };
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69
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70 struct gni_sockinet {
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71 u_char si_len;
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72 u_char si_family;
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73 u_short si_port;
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74 };
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75
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76 #define ENI_NOSOCKET 0
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77 #define ENI_NOSERVNAME 1
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78 #define ENI_NOHOSTNAME 2
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79 #define ENI_MEMORY 3
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80 #define ENI_SYSTEM 4
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81 #define ENI_FAMILY 5
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82 #define ENI_SALEN 6
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83
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84 /* forward declaration to make gcc happy */
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85 int getnameinfo Py_PROTO((const struct sockaddr *, size_t, char *, size_t,
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86 char *, size_t, int));
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87
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88 int
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89 getnameinfo(sa, salen, host, hostlen, serv, servlen, flags)
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90 const struct sockaddr *sa;
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91 size_t salen;
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92 char *host;
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93 size_t hostlen;
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94 char *serv;
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95 size_t servlen;
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96 int flags;
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97 {
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98 struct gni_afd *gni_afd;
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99 struct servent *sp;
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100 struct hostent *hp;
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101 u_short port;
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102 int family, len, i;
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103 char *addr, *p;
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104 u_long v4a;
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105 #ifdef ENABLE_IPV6
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106 u_char pfx;
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107 #endif
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108 int h_error;
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109 char numserv[512];
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110 char numaddr[512];
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111
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112 if (sa == NULL)
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113 return ENI_NOSOCKET;
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114
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115 #ifdef HAVE_SOCKADDR_SA_LEN
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116 len = sa->sa_len;
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117 if (len != salen) return ENI_SALEN;
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118 #else
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119 len = salen;
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120 #endif
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121
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122 family = sa->sa_family;
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123 for (i = 0; gni_afdl[i].a_af; i++)
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124 if (gni_afdl[i].a_af == family) {
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125 gni_afd = &gni_afdl[i];
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126 goto found;
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127 }
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128 return ENI_FAMILY;
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129
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130 found:
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131 if (len != gni_afd->a_socklen) return ENI_SALEN;
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132
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133 port = ((struct gni_sockinet *)sa)->si_port; /* network byte order */
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134 addr = (char *)sa + gni_afd->a_off;
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135
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136 if (serv == NULL || servlen == 0) {
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137 /* what we should do? */
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138 } else if (flags & NI_NUMERICSERV) {
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139 sprintf(numserv, "%d", ntohs(port));
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140 if (strlen(numserv) > servlen)
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141 return ENI_MEMORY;
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142 strcpy(serv, numserv);
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143 } else {
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144 sp = getservbyport(port, (flags & NI_DGRAM) ? "udp" : "tcp");
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145 if (sp) {
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146 if (strlen(sp->s_name) > servlen)
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147 return ENI_MEMORY;
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148 strcpy(serv, sp->s_name);
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149 } else
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150 return ENI_NOSERVNAME;
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151 }
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152
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153 switch (sa->sa_family) {
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154 case AF_INET:
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155 v4a = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
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156 if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
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157 flags |= NI_NUMERICHOST;
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158 v4a >>= IN_CLASSA_NSHIFT;
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159 if (v4a == 0 || v4a == IN_LOOPBACKNET)
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160 flags |= NI_NUMERICHOST;
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161 break;
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15ff504632ed Remove INET6 define. Use ENABLE_IPV6 instead.
Martin v. Löwis <martin@v.loewis.de>
parents: 19278
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162 #ifdef ENABLE_IPV6
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163 case AF_INET6:
78383
86558ff7ce33 Issue #15538: Fix compilation of the getnameinfo() / getaddrinfo() emulation code.
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164 pfx = ((struct sockaddr_in6 *)sa)->sin6_addr.s6_addr[0];
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165 if (pfx == 0 || pfx == 0xfe || pfx == 0xff)
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166 flags |= NI_NUMERICHOST;
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167 break;
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168 #endif
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169 }
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170 if (host == NULL || hostlen == 0) {
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171 /* what should we do? */
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172 } else if (flags & NI_NUMERICHOST) {
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173 if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr))
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174 == NULL)
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175 return ENI_SYSTEM;
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176 if (strlen(numaddr) > hostlen)
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177 return ENI_MEMORY;
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178 strcpy(host, numaddr);
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179 } else {
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180 #ifdef ENABLE_IPV6
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181 hp = getipnodebyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af, &h_error);
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182 #else
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183 hp = gethostbyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af);
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184 h_error = h_errno;
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c4db09b87424 Patch #401196: Configuration machinery for IPv6.
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parents:
diff changeset
185 #endif
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186
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187 if (hp) {
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188 if (flags & NI_NOFQDN) {
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189 p = strchr(hp->h_name, '.');
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190 if (p) *p = '\0';
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191 }
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192 if (strlen(hp->h_name) > hostlen) {
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193 #ifdef ENABLE_IPV6
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194 freehostent(hp);
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195 #endif
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196 return ENI_MEMORY;
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197 }
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198 strcpy(host, hp->h_name);
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199 #ifdef ENABLE_IPV6
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200 freehostent(hp);
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201 #endif
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202 } else {
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203 if (flags & NI_NAMEREQD)
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204 return ENI_NOHOSTNAME;
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205 if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr))
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206 == NULL)
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207 return ENI_NOHOSTNAME;
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208 if (strlen(numaddr) > hostlen)
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209 return ENI_MEMORY;
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210 strcpy(host, numaddr);
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211 }
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212 }
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213 return SUCCESS;
18246
c4db09b87424 Patch #401196: Configuration machinery for IPv6.
Martin v. Löwis <martin@v.loewis.de>
parents:
diff changeset
214 }