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annotate deps/Platinum/ThirdParty/Neptune/Source/System/Bsd/NptBsdNetwork.cpp @ 0:3425707ddbf6

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author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /*****************************************************************
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2 |
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3 | Neptune - Network :: BSD Implementation
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4 |
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5 | (c) 2001-2005 Gilles Boccon-Gibod
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6 | Author: Gilles Boccon-Gibod (bok@bok.net)
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7 |
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8 ****************************************************************/
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9
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10 /*----------------------------------------------------------------------
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11 | includes
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12 +---------------------------------------------------------------------*/
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13 #include <sys/types.h>
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14 #include <sys/socket.h>
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15 #include <sys/select.h>
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16 #include <sys/time.h>
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17 #include <sys/ioctl.h>
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18 #include <netinet/in.h>
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19 #include <net/if.h>
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20 //#include <net/if_arp.h>
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21 #include <netdb.h>
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22 #include <fcntl.h>
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23 #include <unistd.h>
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24 #include <errno.h>
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25
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26 #include "NptConfig.h"
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27 #include "NptTypes.h"
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28 #include "NptStreams.h"
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29 #include "NptThreads.h"
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30 #include "NptNetwork.h"
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31 #include "NptUtils.h"
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32 #include "NptConstants.h"
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33
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34 /*----------------------------------------------------------------------
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35 | platform adaptation
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36 +---------------------------------------------------------------------*/
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37 #if !defined(IFHWADDRLEN)
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38 #define IFHWADDRLEN 6 // default to 48 bits
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39 #endif
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40 #if !defined(ARPHRD_ETHER)
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41 #define ARPHRD_ETHER 1
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42 #endif
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43
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44 /*----------------------------------------------------------------------
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45 | NPT_NetworkInterface::GetNetworkInterfaces
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46 +---------------------------------------------------------------------*/
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47 NPT_Result
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48 NPT_NetworkInterface::GetNetworkInterfaces(NPT_List<NPT_NetworkInterface*>& interfaces)
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49 {
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50 int net = socket(AF_INET, SOCK_DGRAM, 0);
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51
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52 // Try to get the config until we have enough memory for it
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53 // According to "Unix Network Programming", some implementations
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54 // do not return an error when the supplied buffer is too small
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55 // so we need to try, increasing the buffer size every time,
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56 // until we get the same size twice. We cannot assume success when
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57 // the returned size is smaller than the supplied buffer, because
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58 // some implementations can return less that the buffer size if
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59 // another structure does not fit.
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60 unsigned int buffer_size = 4096; // initial guess
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61 unsigned int last_size = 0;
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62 struct ifconf config;
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63 unsigned char* buffer;
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64 for (;buffer_size < 16384;) {
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65 buffer = new unsigned char[buffer_size];
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66 config.ifc_len = buffer_size;
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67 config.ifc_buf = (char*)buffer;
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68 if (ioctl(net, SIOCGIFCONF, &config) < 0) {
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69 if (errno != EINVAL || last_size != 0) {
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70 return NPT_ERROR_BASE_UNIX-errno;
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71 }
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72 } else {
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73 if ((unsigned int)config.ifc_len == last_size) {
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74 // same size, we can use the buffer
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75 break;
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76 }
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77 // different size, we need to reallocate
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78 last_size = config.ifc_len;
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79 }
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80
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81 // supply 256 more bytes more next time around
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82 buffer_size += 256;
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83 delete[] buffer;
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84 }
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85
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86 unsigned char *entries;
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87 for (entries = buffer; entries < buffer+config.ifc_len;) {
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88 struct ifreq* entry = (struct ifreq*)entries;
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89 // get the size of the addresses
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90 unsigned int address_length;
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91 #if defined(NPT_CONFIG_HAVE_SOCKADDR_SA_LEN)
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92 address_length = sizeof(struct sockaddr) > entry->ifr_addr.sa_len ?
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93 sizeof(sockaddr) : entry->ifr_addr.sa_len;
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94 #else
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95 switch (entry->ifr_addr.sa_family) {
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96 #if defined(AF_INET6)
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97 case AF_INET6:
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98 address_length = sizeof(struct sockaddr_in6);
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99 break;
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100 #endif // defined(AF_INET6)
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101
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102 default:
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103 address_length = sizeof(struct sockaddr);
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104 break;
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105 }
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106 #endif
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107
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108 // point to the next entry
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109 entries += address_length + sizeof(entry->ifr_name);
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110
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111 // ignore anything except AF_INET addresses
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112 if (entry->ifr_addr.sa_family != AF_INET) {
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113 continue;
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114 }
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115
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116 // get detailed info about the interface
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117 NPT_Flags flags = 0;
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118 #if defined(SIOCGIFFLAGS)
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119 struct ifreq query = *entry;
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120 if (ioctl(net, SIOCGIFFLAGS, &query) < 0) continue;
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121
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122 // process the flags
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123 if ((query.ifr_flags & IFF_UP) == 0) {
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124 // the interface is not up, ignore it
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125 continue;
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126 }
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127 if (query.ifr_flags & IFF_BROADCAST) {
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128 flags |= NPT_NETWORK_INTERFACE_FLAG_BROADCAST;
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129 }
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130 if (query.ifr_flags & IFF_LOOPBACK) {
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131 flags |= NPT_NETWORK_INTERFACE_FLAG_LOOPBACK;
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132 }
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133 #if defined(IFF_POINTOPOINT)
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134 if (query.ifr_flags & IFF_POINTOPOINT) {
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135 flags |= NPT_NETWORK_INTERFACE_FLAG_POINT_TO_POINT;
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136 }
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137 #endif // defined(IFF_POINTOPOINT)
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138 if (query.ifr_flags & IFF_PROMISC) {
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139 flags |= NPT_NETWORK_INTERFACE_FLAG_PROMISCUOUS;
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140 }
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141 if (query.ifr_flags & IFF_MULTICAST) {
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142 flags |= NPT_NETWORK_INTERFACE_FLAG_MULTICAST;
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143 }
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144 #endif // defined(SIOCGIFFLAGS)
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145
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146 // get the mac address
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147 NPT_MacAddress mac;
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148 #if defined(SIOCGIFHWADDR)
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149 if (ioctl(net, SIOCGIFHWADDR, &query) == 0) {
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150 NPT_MacAddress::Type mac_addr_type;
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151 unsigned int mac_addr_length = IFHWADDRLEN;
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152 switch (query.ifr_addr.sa_family) {
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153 #if defined(ARPHRD_ETHER)
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154 case ARPHRD_ETHER:
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155 mac_addr_type = NPT_MacAddress::TYPE_ETHERNET;
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156 break;
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157 #endif
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158
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159 #if defined(ARPHRD_LOOPBACK)
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160 case ARPHRD_LOOPBACK:
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161 mac_addr_type = NPT_MacAddress::TYPE_LOOPBACK;
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162 length = 0;
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163 break;
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164 #endif
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165
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166 #if defined(ARPHRD_PPP)
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167 case ARPHRD_PPP:
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168 mac_addr_type = NPT_MacAddress::TYPE_PPP;
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169 mac_addr_length = 0;
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170 break;
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171 #endif
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172
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173 #if defined(ARPHRD_IEEE80211)
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174 case ARPHRD_IEEE80211:
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175 mac_addr_type = NPT_MacAddress::TYPE_IEEE_802_11;
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176 break;
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177 #endif
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178
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179 default:
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180 mac_addr_type = NPT_MacAddress::TYPE_UNKNOWN;
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181 mac_addr_length = sizeof(query.ifr_addr.sa_data);
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182 break;
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183 }
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184
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185 mac.SetAddress(mac_addr_type, (const unsigned char*)query.ifr_addr.sa_data, mac_addr_length);
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186 }
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187 #endif
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188
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189 // create an interface object
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190 NPT_NetworkInterface* interface = new NPT_NetworkInterface(entry->ifr_name, mac, flags);
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191
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192 // primary address
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193 NPT_IpAddress primary_address(ntohl(((struct sockaddr_in*)&entry->ifr_addr)->sin_addr.s_addr));
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194
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195 // broadcast address
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196 NPT_IpAddress broadcast_address;
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197 #if defined(SIOCGIFBRDADDR)
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198 if (flags & NPT_NETWORK_INTERFACE_FLAG_BROADCAST) {
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199 if (ioctl(net, SIOCGIFBRDADDR, &query) == 0) {
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200 broadcast_address.Set(ntohl(((struct sockaddr_in*)&query.ifr_addr)->sin_addr.s_addr));
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201 }
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202 }
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203 #endif
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204
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205 // point to point address
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206 NPT_IpAddress destination_address;
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207 #if defined(SIOCGIFDSTADDR)
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208 if (flags & NPT_NETWORK_INTERFACE_FLAG_POINT_TO_POINT) {
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209 if (ioctl(net, SIOCGIFDSTADDR, &query) == 0) {
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210 destination_address.Set(ntohl(((struct sockaddr_in*)&query.ifr_addr)->sin_addr.s_addr));
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211 }
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212 }
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213 #endif
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214
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215 // netmask
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216 NPT_IpAddress netmask(0xFFFFFFFF);
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217 #if defined(SIOCGIFNETMASK)
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218 if (ioctl(net, SIOCGIFNETMASK, &query) == 0) {
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219 netmask.Set(ntohl(((struct sockaddr_in*)&query.ifr_addr)->sin_addr.s_addr));
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220 }
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221 #endif
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222
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223 // create the interface object
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224 NPT_NetworkInterfaceAddress iface_address(
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225 primary_address,
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226 broadcast_address,
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227 destination_address,
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228 netmask);
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229 interface->AddAddress(iface_address);
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230
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231 // add the interface to the list
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232 interfaces.Add(interface);
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233 }
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234
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235 // free resources
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236 delete[] buffer;
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237 close(net);
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238
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239 return NPT_SUCCESS;
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240 }