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annotate Modules/socketmodule.h @ 58689:514b56efd89a 3.1

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Merged revisions 77962 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ................ r77962 | r.david.murray | 2010-02-04 11:41:57 -0500 (Thu, 04 Feb 2010) | 17 lines Merged revisions 77943,77959-77960 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77943 | r.david.murray | 2010-02-03 08:36:23 -0500 (Wed, 03 Feb 2010) | 2 lines Explicitly mention the default value for formatdate's usegmt parameter. ........ r77959 | nick.coghlan | 2010-02-04 07:43:58 -0500 (Thu, 04 Feb 2010) | 1 line Issue 6760: Clarify args handling for subprocess.Popen. Patch by Chris Rebert ........ r77960 | r.david.murray | 2010-02-04 11:33:31 -0500 (Thu, 04 Feb 2010) | 2 lines Add Chris Rebert to ACKS for issue 6760 Popen doc improvements. ........ ................
author R. David Murray <rdmurray@bitdance.com>
date Thu, 04 Feb 2010 16:44:31 +0000
parents 5c8b2238a2f5
children cab14be0ada1
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1 /* Socket module header file */
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2
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3 /* Includes needed for the sockaddr_* symbols below */
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4 #ifndef MS_WINDOWS
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5 #ifdef __VMS
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6 # include <socket.h>
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7 # else
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8 # include <sys/socket.h>
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9 # endif
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10 # include <netinet/in.h>
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11 # if !(defined(__CYGWIN__) || (defined(PYOS_OS2) && defined(PYCC_VACPP)))
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12 # include <netinet/tcp.h>
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13 # endif
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14
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15 #else /* MS_WINDOWS */
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16 # include <winsock2.h>
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17 # include <ws2tcpip.h>
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18 /* VC6 is shipped with old platform headers, and does not have MSTcpIP.h
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19 * Separate SDKs have all the functions we want, but older ones don't have
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20 * any version information.
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21 * I use SIO_GET_MULTICAST_FILTER to detect a decent SDK.
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22 */
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23 # ifdef SIO_GET_MULTICAST_FILTER
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24 # include <MSTcpIP.h> /* for SIO_RCVALL */
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25 # define HAVE_ADDRINFO
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26 # define HAVE_SOCKADDR_STORAGE
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27 # define HAVE_GETADDRINFO
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28 # define HAVE_GETNAMEINFO
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29 # define ENABLE_IPV6
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30 # else
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31 typedef int socklen_t;
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32 # endif /* IPPROTO_IPV6 */
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33 #endif /* MS_WINDOWS */
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34
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35 #ifdef HAVE_SYS_UN_H
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36 # include <sys/un.h>
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37 #else
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38 # undef AF_UNIX
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39 #endif
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40
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41 #ifdef HAVE_LINUX_NETLINK_H
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42 # ifdef HAVE_ASM_TYPES_H
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43 # include <asm/types.h>
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44 # endif
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45 # include <linux/netlink.h>
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46 #else
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47 # undef AF_NETLINK
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48 #endif
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49
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50 #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
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51 #include <bluetooth/bluetooth.h>
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52 #include <bluetooth/rfcomm.h>
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53 #include <bluetooth/l2cap.h>
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54 #include <bluetooth/sco.h>
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55 #include <bluetooth/hci.h>
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56 #endif
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57
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58 #ifdef HAVE_BLUETOOTH_H
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59 #include <bluetooth.h>
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60 #endif
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61
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62 #ifdef HAVE_NETPACKET_PACKET_H
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63 # include <sys/ioctl.h>
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64 # include <net/if.h>
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65 # include <netpacket/packet.h>
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66 #endif
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67
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68 #ifdef HAVE_LINUX_TIPC_H
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69 # include <linux/tipc.h>
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70 #endif
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71
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72 #ifndef Py__SOCKET_H
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73 #define Py__SOCKET_H
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74 #ifdef __cplusplus
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75 extern "C" {
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76 #endif
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77
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78 /* Python module and C API name */
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79 #define PySocket_MODULE_NAME "_socket"
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80 #define PySocket_CAPI_NAME "CAPI"
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81 #define PySocket_CAPSULE_NAME PySocket_MODULE_NAME "." PySocket_CAPI_NAME
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82
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83 /* Abstract the socket file descriptor type */
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84 #ifdef MS_WINDOWS
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85 typedef SOCKET SOCKET_T;
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86 # ifdef MS_WIN64
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87 # define SIZEOF_SOCKET_T 8
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88 # else
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89 # define SIZEOF_SOCKET_T 4
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90 # endif
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91 #else
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92 typedef int SOCKET_T;
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93 # define SIZEOF_SOCKET_T SIZEOF_INT
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94 #endif
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95
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96 /* Socket address */
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97 typedef union sock_addr {
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98 struct sockaddr_in in;
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99 #ifdef AF_UNIX
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100 struct sockaddr_un un;
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101 #endif
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102 #ifdef AF_NETLINK
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103 struct sockaddr_nl nl;
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104 #endif
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105 #ifdef ENABLE_IPV6
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106 struct sockaddr_in6 in6;
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107 struct sockaddr_storage storage;
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108 #endif
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109 #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
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110 struct sockaddr_l2 bt_l2;
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111 struct sockaddr_rc bt_rc;
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112 struct sockaddr_sco bt_sco;
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113 struct sockaddr_hci bt_hci;
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114 #endif
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115 #ifdef HAVE_NETPACKET_PACKET_H
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116 struct sockaddr_ll ll;
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117 #endif
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118 } sock_addr_t;
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119
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120 /* The object holding a socket. It holds some extra information,
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121 like the address family, which is used to decode socket address
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122 arguments properly. */
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123
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124 typedef struct {
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125 PyObject_HEAD
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126 SOCKET_T sock_fd; /* Socket file descriptor */
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127 int sock_family; /* Address family, e.g., AF_INET */
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128 int sock_type; /* Socket type, e.g., SOCK_STREAM */
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129 int sock_proto; /* Protocol type, usually 0 */
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130 PyObject *(*errorhandler)(void); /* Error handler; checks
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131 errno, returns NULL and
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132 sets a Python exception */
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133 double sock_timeout; /* Operation timeout in seconds;
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134 0.0 means non-blocking */
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135 } PySocketSockObject;
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136
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137 /* --- C API ----------------------------------------------------*/
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138
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139 /* Short explanation of what this C API export mechanism does
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140 and how it works:
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141
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142 The _ssl module needs access to the type object defined in
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143 the _socket module. Since cross-DLL linking introduces a lot of
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144 problems on many platforms, the "trick" is to wrap the
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145 C API of a module in a struct which then gets exported to
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146 other modules via a PyCapsule.
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147
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148 The code in socketmodule.c defines this struct (which currently
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149 only contains the type object reference, but could very
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150 well also include other C APIs needed by other modules)
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151 and exports it as PyCapsule via the module dictionary
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152 under the name "CAPI".
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153
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154 Other modules can now include the socketmodule.h file
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155 which defines the needed C APIs to import and set up
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156 a static copy of this struct in the importing module.
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157
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158 After initialization, the importing module can then
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159 access the C APIs from the _socket module by simply
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160 referring to the static struct, e.g.
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161
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162 Load _socket module and its C API; this sets up the global
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163 PySocketModule:
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164
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165 if (PySocketModule_ImportModuleAndAPI())
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166 return;
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167
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168
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169 Now use the C API as if it were defined in the using
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170 module:
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171
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172 if (!PyArg_ParseTuple(args, "O!|zz:ssl",
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173
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174 PySocketModule.Sock_Type,
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175
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176 (PyObject*)&Sock,
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177 &key_file, &cert_file))
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178 return NULL;
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179
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180 Support could easily be extended to export more C APIs/symbols
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181 this way. Currently, only the type object is exported,
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182 other candidates would be socket constructors and socket
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183 access functions.
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184
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185 */
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186
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187 /* C API for usage by other Python modules */
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188 typedef struct {
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189 PyTypeObject *Sock_Type;
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190 PyObject *error;
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191 } PySocketModule_APIObject;
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192
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193 #define PySocketModule_ImportModuleAndAPI() PyCapsule_Import(PySocket_CAPSULE_NAME, 1)
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194
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195 #ifdef __cplusplus
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196 }
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197 #endif
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198 #endif /* !Py__SOCKET_H */