Mercurial > cpython-lru_cache-weakref

annotate Modules/socketmodule.h @ 49955:878d40468c4e legacy-trunk

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Issue #4384: Added logging integration with warnings module using captureWarnings(). This change includes a NullHandler which does nothing; it will be of use to library developers who want to avoid the "No handlers could be found for logger XXX" message which can appear if the library user doesn't configure logging.
author Vinay Sajip <vinay_sajip@yahoo.co.uk>
date Wed, 03 Dec 2008 23:22:58 +0000
parents e9c935cd7888
children e38335d4df91 d11fbc796499
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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(__BEOS__) || 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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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
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82 /* Abstract the socket file descriptor type */
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83 #ifdef MS_WINDOWS
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84 typedef SOCKET SOCKET_T;
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85 # ifdef MS_WIN64
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86 # define SIZEOF_SOCKET_T 8
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87 # else
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88 # define SIZEOF_SOCKET_T 4
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89 # endif
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90 #else
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91 typedef int SOCKET_T;
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92 # define SIZEOF_SOCKET_T SIZEOF_INT
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93 #endif
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94
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95 /* Socket address */
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96 typedef union sock_addr {
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97 struct sockaddr_in in;
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98 #ifdef AF_UNIX
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99 struct sockaddr_un un;
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100 #endif
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101 #ifdef AF_NETLINK
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102 struct sockaddr_nl nl;
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103 #endif
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104 #ifdef ENABLE_IPV6
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105 struct sockaddr_in6 in6;
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106 struct sockaddr_storage storage;
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107 #endif
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108 #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
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109 struct sockaddr_l2 bt_l2;
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110 struct sockaddr_rc bt_rc;
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111 struct sockaddr_sco bt_sco;
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112 struct sockaddr_hci bt_hci;
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113 #endif
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114 #ifdef HAVE_NETPACKET_PACKET_H
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115 struct sockaddr_ll ll;
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116 #endif
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117 } sock_addr_t;
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118
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119 /* The object holding a socket. It holds some extra information,
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120 like the address family, which is used to decode socket address
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121 arguments properly. */
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122
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123 typedef struct {
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124 PyObject_HEAD
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125 SOCKET_T sock_fd; /* Socket file descriptor */
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126 int sock_family; /* Address family, e.g., AF_INET */
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127 int sock_type; /* Socket type, e.g., SOCK_STREAM */
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128 int sock_proto; /* Protocol type, usually 0 */
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129 PyObject *(*errorhandler)(void); /* Error handler; checks
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130 errno, returns NULL and
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131 sets a Python exception */
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132 double sock_timeout; /* Operation timeout in seconds;
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133 0.0 means non-blocking */
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134 } PySocketSockObject;
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135
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136 /* --- C API ----------------------------------------------------*/
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137
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138 /* Short explanation of what this C API export mechanism does
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139 and how it works:
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140
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141 The _ssl module needs access to the type object defined in
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142 the _socket module. Since cross-DLL linking introduces a lot of
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143 problems on many platforms, the "trick" is to wrap the
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144 C API of a module in a struct which then gets exported to
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145 other modules via a PyCObject.
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146
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147 The code in socketmodule.c defines this struct (which currently
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148 only contains the type object reference, but could very
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149 well also include other C APIs needed by other modules)
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150 and exports it as PyCObject via the module dictionary
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151 under the name "CAPI".
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152
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153 Other modules can now include the socketmodule.h file
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154 which defines the needed C APIs to import and set up
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155 a static copy of this struct in the importing module.
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156
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157 After initialization, the importing module can then
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158 access the C APIs from the _socket module by simply
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159 referring to the static struct, e.g.
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160
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161 Load _socket module and its C API; this sets up the global
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162 PySocketModule:
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163
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164 if (PySocketModule_ImportModuleAndAPI())
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165 return;
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166
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167
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168 Now use the C API as if it were defined in the using
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169 module:
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170
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171 if (!PyArg_ParseTuple(args, "O!|zz:ssl",
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172
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173 PySocketModule.Sock_Type,
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174
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175 (PyObject*)&Sock,
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176 &key_file, &cert_file))
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177 return NULL;
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178
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179 Support could easily be extended to export more C APIs/symbols
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180 this way. Currently, only the type object is exported,
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181 other candidates would be socket constructors and socket
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182 access functions.
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183
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184 */
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185
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186 /* C API for usage by other Python modules */
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187 typedef struct {
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188 PyTypeObject *Sock_Type;
31790
29da8bdfeb4e Make socket.sslerror a subclass of socket.error .
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189 PyObject *error;
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190 } PySocketModule_APIObject;
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191
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192 /* XXX The net effect of the following appears to be to define a function
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193 XXX named PySocketModule_APIObject in _ssl.c. It's unclear why it isn't
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194 XXX defined there directly.
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195
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196 >>> It's defined here because other modules might also want to use
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197 >>> the C API.
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198
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199 */
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200 #ifndef PySocket_BUILDING_SOCKET
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201
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202 /* --- C API ----------------------------------------------------*/
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203
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204 /* Interfacestructure to C API for other modules.
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205 Call PySocketModule_ImportModuleAndAPI() to initialize this
21959
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206 structure. After that usage is simple:
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207
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208 if (!PyArg_ParseTuple(args, "O!|zz:ssl",
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209 &PySocketModule.Sock_Type, (PyObject*)&Sock,
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210 &key_file, &cert_file))
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211 return NULL;
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212 ...
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213 */
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214
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215 static
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216 PySocketModule_APIObject PySocketModule;
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217
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218 /* You *must* call this before using any of the functions in
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219 PySocketModule and check its outcome; otherwise all accesses will
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220 result in a segfault. Returns 0 on success. */
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221
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222 #ifndef DPRINTF
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223 # define DPRINTF if (0) printf
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224 #endif
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225
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226 static
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227 int PySocketModule_ImportModuleAndAPI(void)
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228 {
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229 PyObject *mod = 0, *v = 0;
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230 char *apimodule = PySocket_MODULE_NAME;
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231 char *apiname = PySocket_CAPI_NAME;
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232 void *api;
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233
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234 DPRINTF("Importing the %s C API...\n", apimodule);
44439
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Christian Heimes <christian@cheimes.de>
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235 mod = PyImport_ImportModuleNoBlock(apimodule);
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236 if (mod == NULL)
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237 goto onError;
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238 DPRINTF(" %s package found\n", apimodule);
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239 v = PyObject_GetAttrString(mod, apiname);
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240 if (v == NULL)
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241 goto onError;
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242 Py_DECREF(mod);
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243 DPRINTF(" API object %s found\n", apiname);
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244 api = PyCObject_AsVoidPtr(v);
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245 if (api == NULL)
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246 goto onError;
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247 Py_DECREF(v);
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248 memcpy(&PySocketModule, api, sizeof(PySocketModule));
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249 DPRINTF(" API object loaded and initialized.\n");
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250 return 0;
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251
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252 onError:
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253 DPRINTF(" not found.\n");
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254 Py_XDECREF(mod);
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255 Py_XDECREF(v);
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256 return -1;
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257 }
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258
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259 #endif /* !PySocket_BUILDING_SOCKET */
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260
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261 #ifdef __cplusplus
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262 }
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263 #endif
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264 #endif /* !Py__SOCKET_H */