annotate nspr/pr/include/prnetdb.h @ 4:b513267f632f tip

Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #ifndef prnetdb_h___
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7 #define prnetdb_h___
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8
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9 #include "prtypes.h"
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10 #include "prio.h"
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11
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12 PR_BEGIN_EXTERN_C
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13
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14
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15 /*
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16 *********************************************************************
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17 * Translate an Internet address to/from a character string
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18 *********************************************************************
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19 */
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20 NSPR_API(PRStatus) PR_StringToNetAddr(
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21 const char *string, PRNetAddr *addr);
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22
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23 NSPR_API(PRStatus) PR_NetAddrToString(
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24 const PRNetAddr *addr, char *string, PRUint32 size);
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25
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26 /*
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27 ** Structures returned by network data base library. All addresses are
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28 ** supplied in host order, and returned in network order (suitable for
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29 ** use in system calls).
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30 */
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31 /*
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32 ** Beware that WINSOCK.H defines h_addrtype and h_length as short.
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33 ** Client code does direct struct copies of hostent to PRHostEnt and
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34 ** hence the ifdef.
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35 */
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36 typedef struct PRHostEnt {
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37 char *h_name; /* official name of host */
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38 char **h_aliases; /* alias list */
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39 #ifdef WIN32
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40 PRInt16 h_addrtype; /* host address type */
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41 PRInt16 h_length; /* length of address */
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42 #else
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43 PRInt32 h_addrtype; /* host address type */
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44 PRInt32 h_length; /* length of address */
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45 #endif
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46 char **h_addr_list; /* list of addresses from name server */
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47 } PRHostEnt;
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48
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49 /* A safe size to use that will mostly work... */
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50 #if (defined(AIX) && defined(_THREAD_SAFE)) || defined(OSF1)
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51 #define PR_NETDB_BUF_SIZE sizeof(struct protoent_data)
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52 #else
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53 #define PR_NETDB_BUF_SIZE 1024
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54 #endif
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55
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56 /***********************************************************************
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57 ** FUNCTION:
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58 ** DESCRIPTION: PR_GetHostByName()
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59 ** Lookup a host by name.
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60 **
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61 ** INPUTS:
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62 ** char *hostname Character string defining the host name of interest
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63 ** char *buf A scratch buffer for the runtime to return result.
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64 ** This buffer is allocated by the caller.
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65 ** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
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66 ** use is PR_NETDB_BUF_SIZE.
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67 ** OUTPUTS:
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68 ** PRHostEnt *hostentry
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69 ** This structure is filled in by the runtime if
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70 ** the function returns PR_SUCCESS. This structure
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71 ** is allocated by the caller.
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72 ** RETURN:
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73 ** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
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74 ** the result will be PR_FAILURE and the reason
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75 ** for the failure can be retrieved by PR_GetError().
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76 ***********************************************************************/
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77 NSPR_API(PRStatus) PR_GetHostByName(
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78 const char *hostname, char *buf, PRIntn bufsize, PRHostEnt *hostentry);
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79
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80 /***********************************************************************
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81 ** FUNCTION:
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82 ** DESCRIPTION: PR_GetIPNodeByName()
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83 ** Lookup a host by name. Equivalent to getipnodebyname(AI_DEFAULT)
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84 ** of RFC 2553.
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85 **
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86 ** INPUTS:
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87 ** char *hostname Character string defining the host name of interest
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88 ** PRUint16 af Address family (either PR_AF_INET or PR_AF_INET6)
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89 ** PRIntn flags Specifies the types of addresses that are searched
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90 ** for and the types of addresses that are returned.
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91 ** The only supported flag is PR_AI_DEFAULT.
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92 ** char *buf A scratch buffer for the runtime to return result.
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93 ** This buffer is allocated by the caller.
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94 ** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
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95 ** use is PR_NETDB_BUF_SIZE.
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96 ** OUTPUTS:
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97 ** PRHostEnt *hostentry
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98 ** This structure is filled in by the runtime if
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99 ** the function returns PR_SUCCESS. This structure
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100 ** is allocated by the caller.
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101 ** RETURN:
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102 ** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
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103 ** the result will be PR_FAILURE and the reason
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104 ** for the failure can be retrieved by PR_GetError().
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105 ***********************************************************************/
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106
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107
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108 #define PR_AI_ALL 0x08
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109 #define PR_AI_V4MAPPED 0x10
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110 #define PR_AI_ADDRCONFIG 0x20
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111 #define PR_AI_NOCANONNAME 0x8000
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112 #define PR_AI_DEFAULT (PR_AI_V4MAPPED | PR_AI_ADDRCONFIG)
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113
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114 NSPR_API(PRStatus) PR_GetIPNodeByName(
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115 const char *hostname,
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116 PRUint16 af,
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117 PRIntn flags,
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118 char *buf,
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119 PRIntn bufsize,
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120 PRHostEnt *hostentry);
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121
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122 /***********************************************************************
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123 ** FUNCTION:
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124 ** DESCRIPTION: PR_GetHostByAddr()
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125 ** Lookup a host entry by its network address.
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126 **
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127 ** INPUTS:
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128 ** char *hostaddr IP address of host in question
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129 ** char *buf A scratch buffer for the runtime to return result.
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130 ** This buffer is allocated by the caller.
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131 ** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
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132 ** use is PR_NETDB_BUF_SIZE.
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133 ** OUTPUTS:
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134 ** PRHostEnt *hostentry
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135 ** This structure is filled in by the runtime if
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136 ** the function returns PR_SUCCESS. This structure
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137 ** is allocated by the caller.
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138 ** RETURN:
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139 ** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
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140 ** the result will be PR_FAILURE and the reason
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141 ** for the failure can be retrieved by PR_GetError().
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142 ***********************************************************************/
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143 NSPR_API(PRStatus) PR_GetHostByAddr(
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144 const PRNetAddr *hostaddr, char *buf, PRIntn bufsize, PRHostEnt *hostentry);
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145
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146 /***********************************************************************
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147 ** FUNCTION: PR_EnumerateHostEnt()
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148 ** DESCRIPTION:
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149 ** A stateless enumerator over a PRHostEnt structure acquired from
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150 ** PR_GetHostByName() PR_GetHostByAddr() to evaluate the possible
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151 ** network addresses.
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152 **
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153 ** INPUTS:
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154 ** PRIntn enumIndex Index of the enumeration. The enumeration starts
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155 ** and ends with a value of zero.
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156 **
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157 ** PRHostEnt *hostEnt A pointer to a host entry struct that was
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158 ** previously returned by PR_GetHostByName() or
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159 ** PR_GetHostByAddr().
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160 **
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161 ** PRUint16 port The port number to be assigned as part of the
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162 ** PRNetAddr.
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163 **
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164 ** OUTPUTS:
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165 ** PRNetAddr *address A pointer to an address structure that will be
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166 ** filled in by the call to the enumeration if the
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167 ** result of the call is greater than zero.
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168 **
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169 ** RETURN:
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170 ** PRIntn The value that should be used for the next call
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171 ** of the enumerator ('enumIndex'). The enumeration
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172 ** is ended if this value is returned zero.
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173 ** If a value of -1 is returned, the enumeration
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174 ** has failed. The reason for the failure can be
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175 ** retrieved by calling PR_GetError().
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176 ***********************************************************************/
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177 NSPR_API(PRIntn) PR_EnumerateHostEnt(
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178 PRIntn enumIndex, const PRHostEnt *hostEnt, PRUint16 port, PRNetAddr *address);
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179
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180 /***********************************************************************
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181 ** FUNCTION: PR_InitializeNetAddr(),
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182 ** DESCRIPTION:
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183 ** Initialize the fields of a PRNetAddr, assigning well known values as
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184 ** appropriate.
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185 **
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186 ** INPUTS
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187 ** PRNetAddrValue val The value to be assigned to the IP Address portion
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188 ** of the network address. This can only specify the
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189 ** special well known values that are equivalent to
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190 ** INADDR_ANY and INADDR_LOOPBACK.
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191 **
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192 ** PRUint16 port The port number to be assigned in the structure.
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193 **
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194 ** OUTPUTS:
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195 ** PRNetAddr *addr The address to be manipulated.
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196 **
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197 ** RETURN:
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198 ** PRStatus To indicate success or failure. If the latter, the
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199 ** reason for the failure can be retrieved by calling
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200 ** PR_GetError();
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201 ***********************************************************************/
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202 typedef enum PRNetAddrValue
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203 {
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204 PR_IpAddrNull, /* do NOT overwrite the IP address */
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205 PR_IpAddrAny, /* assign logical INADDR_ANY to IP address */
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206 PR_IpAddrLoopback, /* assign logical INADDR_LOOPBACK */
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207 PR_IpAddrV4Mapped /* IPv4 mapped address */
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208 } PRNetAddrValue;
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209
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210 NSPR_API(PRStatus) PR_InitializeNetAddr(
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211 PRNetAddrValue val, PRUint16 port, PRNetAddr *addr);
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212
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213 /***********************************************************************
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214 ** FUNCTION: PR_SetNetAddr(),
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215 ** DESCRIPTION:
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216 ** Set the fields of a PRNetAddr, assigning well known values as
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217 ** appropriate. This function is similar to PR_InitializeNetAddr
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218 ** but differs in that the address family is specified.
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219 **
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220 ** INPUTS
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221 ** PRNetAddrValue val The value to be assigned to the IP Address portion
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222 ** of the network address. This can only specify the
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223 ** special well known values that are equivalent to
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224 ** INADDR_ANY and INADDR_LOOPBACK.
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225 **
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226 ** PRUint16 af The address family (either PR_AF_INET or PR_AF_INET6)
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227 **
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228 ** PRUint16 port The port number to be assigned in the structure.
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229 **
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230 ** OUTPUTS:
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231 ** PRNetAddr *addr The address to be manipulated.
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232 **
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233 ** RETURN:
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234 ** PRStatus To indicate success or failure. If the latter, the
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235 ** reason for the failure can be retrieved by calling
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236 ** PR_GetError();
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237 ***********************************************************************/
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238 NSPR_API(PRStatus) PR_SetNetAddr(
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239 PRNetAddrValue val, PRUint16 af, PRUint16 port, PRNetAddr *addr);
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240
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241 /***********************************************************************
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242 ** FUNCTION:
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243 ** DESCRIPTION: PR_IsNetAddrType()
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244 ** Determine if the network address is of the specified type.
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245 **
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246 ** INPUTS:
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247 ** const PRNetAddr *addr A network address.
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248 ** PRNetAddrValue The type of network address
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249 **
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250 ** RETURN:
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251 ** PRBool PR_TRUE if the network address is of the
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252 ** specified type, else PR_FALSE.
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253 ***********************************************************************/
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254 NSPR_API(PRBool) PR_IsNetAddrType(const PRNetAddr *addr, PRNetAddrValue val);
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255
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256 /***********************************************************************
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257 ** FUNCTION:
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258 ** DESCRIPTION: PR_ConvertIPv4AddrToIPv6()
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259 ** Convert an IPv4 addr to an (IPv4-mapped) IPv6 addr
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260 **
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261 ** INPUTS:
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262 ** PRUint32 v4addr IPv4 address
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263 **
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264 ** OUTPUTS:
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265 ** PRIPv6Addr *v6addr The converted IPv6 address
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266 **
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267 ** RETURN:
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268 ** void
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269 **
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270 ***********************************************************************/
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271 NSPR_API(void) PR_ConvertIPv4AddrToIPv6(PRUint32 v4addr, PRIPv6Addr *v6addr);
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272
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273 /***********************************************************************
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274 ** MACRO:
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275 ** DESCRIPTION: PR_NetAddrFamily()
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276 ** Get the 'family' field of a PRNetAddr union.
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277 **
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278 ** INPUTS:
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279 ** const PRNetAddr *addr A network address.
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280 **
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281 ** RETURN:
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282 ** PRUint16 The 'family' field of 'addr'.
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283 ***********************************************************************/
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284 #define PR_NetAddrFamily(addr) ((addr)->raw.family)
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285
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286 /***********************************************************************
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287 ** MACRO:
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288 ** DESCRIPTION: PR_NetAddrInetPort()
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289 ** Get the 'port' field of a PRNetAddr union.
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290 **
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291 ** INPUTS:
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292 ** const PRNetAddr *addr A network address.
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293 **
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294 ** RETURN:
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295 ** PRUint16 The 'port' field of 'addr'.
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296 ***********************************************************************/
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297 #define PR_NetAddrInetPort(addr) \
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298 ((addr)->raw.family == PR_AF_INET6 ? (addr)->ipv6.port : (addr)->inet.port)
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299
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300 /***********************************************************************
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301 ** FUNCTION:
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302 ** DESCRIPTION: PR_GetProtoByName()
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303 ** Lookup a protocol entry based on protocol's name
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304 **
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305 ** INPUTS:
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306 ** char *protocolname Character string of the protocol's name.
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307 ** char *buf A scratch buffer for the runtime to return result.
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308 ** This buffer is allocated by the caller.
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309 ** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
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310 ** use is PR_NETDB_BUF_SIZE.
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311 ** OUTPUTS:
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312 ** PRHostEnt *PRProtoEnt
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313 ** This structure is filled in by the runtime if
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314 ** the function returns PR_SUCCESS. This structure
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315 ** is allocated by the caller.
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316 ** RETURN:
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317 ** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
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318 ** the result will be PR_FAILURE and the reason
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319 ** for the failure can be retrieved by PR_GetError().
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320 ***********************************************************************/
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321
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322 typedef struct PRProtoEnt {
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323 char *p_name; /* official protocol name */
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324 char **p_aliases; /* alias list */
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325 #ifdef WIN32
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326 PRInt16 p_num; /* protocol # */
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327 #else
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328 PRInt32 p_num; /* protocol # */
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329 #endif
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330 } PRProtoEnt;
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331
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332 NSPR_API(PRStatus) PR_GetProtoByName(
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333 const char* protocolname, char* buffer, PRInt32 bufsize, PRProtoEnt* result);
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334
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335 /***********************************************************************
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336 ** FUNCTION:
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337 ** DESCRIPTION: PR_GetProtoByNumber()
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338 ** Lookup a protocol entry based on protocol's number
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339 **
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340 ** INPUTS:
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341 ** PRInt32 protocolnumber
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342 ** Number assigned to the protocol.
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343 ** char *buf A scratch buffer for the runtime to return result.
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344 ** This buffer is allocated by the caller.
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345 ** PRIntn bufsize Number of bytes in 'buf'. A recommnded value to
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346 ** use is PR_NETDB_BUF_SIZE.
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347 ** OUTPUTS:
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348 ** PRHostEnt *PRProtoEnt
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349 ** This structure is filled in by the runtime if
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350 ** the function returns PR_SUCCESS. This structure
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351 ** is allocated by the caller.
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352 ** RETURN:
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353 ** PRStatus PR_SUCCESS if the lookup succeeds. If it fails
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354 ** the result will be PR_FAILURE and the reason
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355 ** for the failure can be retrieved by PR_GetError().
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356 ***********************************************************************/
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357 NSPR_API(PRStatus) PR_GetProtoByNumber(
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358 PRInt32 protocolnumber, char* buffer, PRInt32 bufsize, PRProtoEnt* result);
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359
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360 /***********************************************************************
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361 ** FUNCTION:
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362 ** DESCRIPTION: PR_GetAddrInfoByName()
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363 ** Look up a host by name. Equivalent to getaddrinfo(host, NULL, ...) of
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364 ** RFC 3493.
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365 **
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366 ** INPUTS:
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367 ** char *hostname Character string defining the host name of interest
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368 ** PRUint16 af May be PR_AF_UNSPEC or PR_AF_INET.
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369 ** PRIntn flags May be either PR_AI_ADDRCONFIG or
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370 ** PR_AI_ADDRCONFIG | PR_AI_NOCANONNAME. Include
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371 ** PR_AI_NOCANONNAME to suppress the determination of
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372 ** the canonical name corresponding to hostname.
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373 ** RETURN:
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374 ** PRAddrInfo* Handle to a data structure containing the results
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375 ** of the host lookup. Use PR_EnumerateAddrInfo to
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376 ** inspect the PRNetAddr values stored in this object.
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377 ** When no longer needed, this handle must be destroyed
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378 ** with a call to PR_FreeAddrInfo. If a lookup error
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379 ** occurs, then NULL will be returned.
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380 ***********************************************************************/
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381 typedef struct PRAddrInfo PRAddrInfo;
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382
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383 NSPR_API(PRAddrInfo*) PR_GetAddrInfoByName(
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384 const char *hostname, PRUint16 af, PRIntn flags);
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385
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386 /***********************************************************************
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387 ** FUNCTION:
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388 ** DESCRIPTION: PR_FreeAddrInfo()
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389 ** Destroy the PRAddrInfo handle allocated by PR_GetAddrInfoByName().
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390 **
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391 ** INPUTS:
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392 ** PRAddrInfo *addrInfo
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393 ** The handle resulting from a successful call to
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394 ** PR_GetAddrInfoByName().
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395 ** RETURN:
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396 ** void
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397 ***********************************************************************/
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398 NSPR_API(void) PR_FreeAddrInfo(PRAddrInfo *addrInfo);
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399
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400 /***********************************************************************
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401 ** FUNCTION:
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402 ** DESCRIPTION: PR_EnumerateAddrInfo()
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403 ** A stateless enumerator over a PRAddrInfo handle acquired from
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404 ** PR_GetAddrInfoByName() to inspect the possible network addresses.
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405 **
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406 ** INPUTS:
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407 ** void *enumPtr Index pointer of the enumeration. The enumeration
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408 ** starts and ends with a value of NULL.
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409 ** const PRAddrInfo *addrInfo
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410 ** The PRAddrInfo handle returned by a successful
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411 ** call to PR_GetAddrInfoByName().
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412 ** PRUint16 port The port number to be assigned as part of the
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413 ** PRNetAddr.
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414 ** OUTPUTS:
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415 ** PRNetAddr *result A pointer to an address structure that will be
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416 ** filled in by the call to the enumeration if the
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417 ** result of the call is not NULL.
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418 ** RETURN:
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419 ** void* The value that should be used for the next call
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420 ** of the enumerator ('enumPtr'). The enumeration
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421 ** is ended if this value is NULL.
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422 ***********************************************************************/
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423 NSPR_API(void *) PR_EnumerateAddrInfo(
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424 void *enumPtr, const PRAddrInfo *addrInfo, PRUint16 port, PRNetAddr *result);
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425
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426 /***********************************************************************
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427 ** FUNCTION:
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428 ** DESCRIPTION: PR_GetCanonNameFromAddrInfo()
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429 ** Extracts the canonical name of the hostname passed to
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430 ** PR_GetAddrInfoByName().
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431 **
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432 ** INPUTS:
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433 ** const PRAddrInfo *addrInfo
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434 ** The PRAddrInfo handle returned by a successful
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435 ** call to PR_GetAddrInfoByName().
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436 ** RETURN:
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437 ** const char * A const pointer to the canonical hostname stored
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438 ** in the given PRAddrInfo handle. This pointer is
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439 ** invalidated once the PRAddrInfo handle is destroyed
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440 ** by a call to PR_FreeAddrInfo().
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441 ***********************************************************************/
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442 NSPR_API(const char *) PR_GetCanonNameFromAddrInfo(
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443 const PRAddrInfo *addrInfo);
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444
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445 /***********************************************************************
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446 ** FUNCTIONS: PR_ntohs, PR_ntohl, PR_ntohll, PR_htons, PR_htonl, PR_htonll
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447 **
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448 ** DESCRIPTION: API entries for the common byte ordering routines.
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449 **
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450 ** PR_ntohs 16 bit conversion from network to host
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451 ** PR_ntohl 32 bit conversion from network to host
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452 ** PR_ntohll 64 bit conversion from network to host
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453 ** PR_htons 16 bit conversion from host to network
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454 ** PR_htonl 32 bit conversion from host to network
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455 ** PR_ntonll 64 bit conversion from host to network
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456 **
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457 ***********************************************************************/
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458 NSPR_API(PRUint16) PR_ntohs(PRUint16);
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459 NSPR_API(PRUint32) PR_ntohl(PRUint32);
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460 NSPR_API(PRUint64) PR_ntohll(PRUint64);
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461 NSPR_API(PRUint16) PR_htons(PRUint16);
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462 NSPR_API(PRUint32) PR_htonl(PRUint32);
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463 NSPR_API(PRUint64) PR_htonll(PRUint64);
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464
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465 PR_END_EXTERN_C
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466
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467 #endif /* prnetdb_h___ */
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