Mercurial > cpython-lru_cache-weakref
annotate Modules/socketmodule.c @ 396:c262f421a44c legacy-trunk
Added allowbroadcast()
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Sun, 20 Oct 1991 20:22:28 +0000 |
| parents | 70a18a6689d4 |
| children | a5f0b8390c87 |
| rev | line source |
|---|---|
| 294 | 1 /*********************************************************** |
| 2 Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The | |
| 3 Netherlands. | |
| 4 | |
| 5 All Rights Reserved | |
| 6 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 25 /* Socket module */ | |
| 26 | |
| 27 /* | |
| 28 This module provides an interface to Berkeley socket IPC. | |
| 29 | |
| 30 Limitations: | |
| 31 | |
|
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32 - only AF_INET and AF_UNIX address families are supported |
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33 - no asynchronous I/O (but read polling: avail) |
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34 - no read/write operations (use send/recv or makefile instead) |
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35 - no flags on sendto/recvfrom operations |
| 396 | 36 - no general setsockopt() call (but see s.allowbroadcast()) |
| 294 | 37 |
| 38 Interface: | |
| 39 | |
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40 - socket.gethostname() --> host name (string) |
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41 - socket.gethostbyname(hostname) --> host IP address (string: 'dd.dd.dd.dd') |
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42 - socket.getservbyname(servername, protocolname) --> port number |
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43 - socket.socket(family, type [, proto]) --> new socket object |
| 294 | 44 - family and type constants from <socket.h> are accessed as socket.AF_INET etc. |
| 45 - errors are reported as the exception socket.error | |
| 46 - an Internet socket address is a pair (hostname, port) | |
| 47 where hostname can be anything recognized by gethostbyname() | |
| 48 (including the dd.dd.dd.dd notation) and port is in host byte order | |
| 49 - where a hostname is returned, the dd.dd.dd.dd notation is used | |
| 50 - a UNIX domain socket is a string specifying the pathname | |
| 51 | |
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52 Socket methods: |
| 294 | 53 |
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54 - s.accept() --> new socket object, sockaddr |
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55 - s.avail() --> boolean |
| 396 | 56 - s.allowbroadcast(boolean) --> None |
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57 - s.bind(sockaddr) --> None |
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58 - s.connect(sockaddr) --> None |
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59 - s.listen(n) --> None |
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60 - s.makefile(mode) --> file object |
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61 - s.recv(nbytes) --> string |
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62 - s.recvfrom(nbytes) --> string, sockaddr |
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63 - s.send(string) --> None |
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64 - s.sendto(string, sockaddr) --> None |
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65 - s.shutdown(how) --> None |
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66 - s.close() --> None |
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67 |
| 294 | 68 */ |
| 69 | |
| 70 #include "allobjects.h" | |
| 71 #include "modsupport.h" | |
| 72 | |
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73 #include <signal.h> |
| 294 | 74 #include <sys/types.h> |
| 75 #include <sys/socket.h> | |
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76 #include <sys/time.h> /* Needed for struct timeval */ |
| 294 | 77 #include <netinet/in.h> |
| 78 #include <sys/un.h> | |
| 79 #include <netdb.h> | |
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80 #ifdef _AIX /* I *think* this works */ |
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81 #include <select.h> /* Needed for fd_set */ |
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82 #endif |
| 294 | 83 |
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84 |
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85 /* Global variable holding the exception type for errors detected |
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86 by this module (but not argument type or memory errors, etc.). */ |
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87 |
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88 static object *SocketError; |
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89 |
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90 |
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91 /* Convenience function to raise an error according to errno |
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92 and return a NULL pointer from a function. */ |
| 294 | 93 |
| 94 static object * | |
| 95 socket_error() | |
| 96 { | |
| 97 return err_errno(SocketError); | |
| 98 } | |
| 99 | |
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100 |
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101 /* The object holding a socket. It holds some extra information, |
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102 like the address family, which is used to decode socket address |
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103 arguments properly. */ |
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104 |
| 294 | 105 typedef struct { |
| 106 OB_HEAD | |
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107 int sock_fd; /* Socket file descriptor */ |
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108 int sock_family; /* Address family, e.g., AF_INET */ |
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109 int sock_type; /* Socket type, e.g., SOCK_STREAM */ |
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110 int sock_proto; /* Protocol type, usually 0 */ |
| 294 | 111 } sockobject; |
| 112 | |
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113 |
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114 /* A forward reference to the Socktype type object. |
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115 The Socktype variable contains pointers to various functions, |
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116 some of which call newsocobject(), which uses Socktype, so |
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117 there has to be a circular reference. */ |
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118 |
| 294 | 119 extern typeobject Socktype; /* Forward */ |
| 120 | |
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121 |
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122 /* Create a new socket object. |
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123 This just creates the object and initializes it. |
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124 If the creation fails, return NULL and set an exception (implicit |
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125 in NEWOBJ()). */ |
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126 |
| 294 | 127 static sockobject * |
| 128 newsockobject(fd, family, type, proto) | |
| 129 int fd, family, type, proto; | |
| 130 { | |
| 131 sockobject *s; | |
| 132 s = NEWOBJ(sockobject, &Socktype); | |
| 133 if (s != NULL) { | |
| 134 s->sock_fd = fd; | |
| 135 s->sock_family = family; | |
| 136 s->sock_type = type; | |
| 137 s->sock_proto = proto; | |
| 138 } | |
| 139 return s; | |
| 140 } | |
| 141 | |
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142 |
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143 /* Convert a string specifying a host name or one of a few symbolic |
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144 names to a numeric IP address. This usually calls gethostbyname() |
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145 to do the work; the names "" and "<broadcast>" are special. |
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146 Return the length (should always be 4 bytes), or negative if |
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147 an error occurred; then an exception is raised. */ |
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148 |
| 294 | 149 static int |
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150 setipaddr(name, addr_ret) |
| 294 | 151 char *name; |
| 152 struct sockaddr_in *addr_ret; | |
| 153 { | |
| 154 struct hostent *hp; | |
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155 int d1, d2, d3, d4; |
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156 char ch; |
| 294 | 157 |
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158 if (name[0] == '\0') { |
| 294 | 159 addr_ret->sin_addr.s_addr = INADDR_ANY; |
| 160 return 4; | |
| 161 } | |
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162 if (name[0] == '<' && strcmp(name, "<broadcast>") == 0) { |
| 294 | 163 addr_ret->sin_addr.s_addr = INADDR_BROADCAST; |
| 164 return 4; | |
| 165 } | |
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166 if (sscanf(name, "%d.%d.%d.%d%c", &d1, &d2, &d3, &d4, &ch) == 4 && |
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167 0 <= d1 && d1 <= 255 && 0 <= d2 && d2 <= 255 && |
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168 0 <= d3 && d3 <= 255 && 0 <= d4 && d4 <= 255) { |
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169 addr_ret->sin_addr.s_addr = htonl( |
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170 ((long) d1 << 24) | ((long) d2 << 16) | |
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171 ((long) d3 << 8) | ((long) d4 << 0)); |
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172 return 4; |
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173 } |
| 294 | 174 hp = gethostbyname(name); |
| 175 if (hp == NULL) { | |
| 176 err_setstr(SocketError, "host not found"); | |
| 177 return -1; | |
| 178 } | |
| 179 memcpy((char *) &addr_ret->sin_addr, hp->h_addr, hp->h_length); | |
| 180 return hp->h_length; | |
| 181 } | |
| 182 | |
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183 |
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184 /* Generally useful convenience function to create a tuple from two |
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185 objects. This eats references to the objects; if either is NULL |
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186 it destroys the other and returns NULL without raising an exception |
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187 (assuming the function that was called to create the argument must |
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188 have raised an exception and returned NULL). */ |
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189 |
| 294 | 190 static object * |
| 191 makepair(a, b) | |
| 192 object *a, *b; | |
| 193 { | |
| 194 object *pair = NULL; | |
| 195 if (a == NULL || b == NULL || (pair = newtupleobject(2)) == NULL) { | |
| 196 XDECREF(a); | |
| 197 XDECREF(b); | |
| 198 return NULL; | |
| 199 } | |
| 200 settupleitem(pair, 0, a); | |
| 201 settupleitem(pair, 1, b); | |
| 202 return pair; | |
| 203 } | |
| 204 | |
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205 |
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206 /* Create a string object representing an IP address. |
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207 This is always a string of the form 'dd.dd.dd.dd' (with variable |
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208 size numbers). */ |
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209 |
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210 static object * |
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211 makeipaddr(addr) |
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212 struct sockaddr_in *addr; |
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213 { |
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214 long x = ntohl(addr->sin_addr.s_addr); |
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215 char buf[100]; |
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216 sprintf(buf, "%d.%d.%d.%d", |
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217 (int) (x>>24) & 0xff, (int) (x>>16) & 0xff, |
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218 (int) (x>> 8) & 0xff, (int) (x>> 0) & 0xff); |
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219 return newstringobject(buf); |
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220 } |
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221 |
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222 |
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223 /* Create an object representing the given socket address, |
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224 suitable for passing it back to bind(), connect() etc. |
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225 The family field of the sockaddr structure is inspected |
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226 to determine what kind of address it really is. */ |
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227 |
| 294 | 228 /*ARGSUSED*/ |
| 229 static object * | |
| 230 makesockaddr(addr, addrlen) | |
| 231 struct sockaddr *addr; | |
| 232 int addrlen; | |
| 233 { | |
|
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234 switch (addr->sa_family) { |
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235 |
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236 case AF_INET: |
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237 { |
| 294 | 238 struct sockaddr_in *a = (struct sockaddr_in *) addr; |
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239 return makepair(makeipaddr(a), |
| 294 | 240 newintobject((long) ntohs(a->sin_port))); |
| 241 } | |
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242 |
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243 case AF_UNIX: |
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244 { |
| 294 | 245 struct sockaddr_un *a = (struct sockaddr_un *) addr; |
| 246 return newstringobject(a->sun_path); | |
| 247 } | |
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248 |
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249 /* More cases here... */ |
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250 |
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251 default: |
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252 err_setstr(SocketError, "return unknown socket address type"); |
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253 return NULL; |
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254 } |
| 294 | 255 } |
| 256 | |
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257 |
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258 /* Parse a socket address argument according to the socket object's |
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259 address family. Return 1 if the address was in the proper format, |
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260 0 of not. The address is returned through addr_ret, its length |
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261 through len_ret. */ |
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262 |
| 294 | 263 static int |
| 264 getsockaddrarg(s, args, addr_ret, len_ret) | |
| 265 sockobject *s; | |
| 266 object *args; | |
| 267 struct sockaddr **addr_ret; | |
| 268 int *len_ret; | |
| 269 { | |
|
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270 switch (s->sock_family) { |
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271 |
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272 case AF_UNIX: |
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273 { |
| 294 | 274 static struct sockaddr_un addr; |
| 275 object *path; | |
| 276 int len; | |
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277 if (!getstrarg(args, &path)) |
| 294 | 278 return 0; |
|
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279 if ((len = getstringsize(path)) > sizeof addr.sun_path) { |
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280 err_setstr(SocketError, "AF_UNIX path too long"); |
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281 return 0; |
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282 } |
| 294 | 283 addr.sun_family = AF_UNIX; |
| 284 memcpy(addr.sun_path, getstringvalue(path), len); | |
| 285 *addr_ret = (struct sockaddr *) &addr; | |
| 286 *len_ret = len + sizeof addr.sun_family; | |
| 287 return 1; | |
| 288 } | |
| 289 | |
|
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290 case AF_INET: |
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291 { |
| 294 | 292 static struct sockaddr_in addr; |
| 293 object *host; | |
| 294 int port; | |
| 295 if (!getstrintarg(args, &host, &port)) | |
| 296 return 0; | |
|
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297 if (setipaddr(getstringvalue(host), &addr) < 0) |
| 294 | 298 return 0; |
| 299 addr.sin_family = AF_INET; | |
| 300 addr.sin_port = htons(port); | |
| 301 *addr_ret = (struct sockaddr *) &addr; | |
| 302 *len_ret = sizeof addr; | |
| 303 return 1; | |
| 304 } | |
| 305 | |
|
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306 /* More cases here... */ |
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307 |
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308 default: |
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309 err_setstr(SocketError, "getsockaddrarg: bad family"); |
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310 return 0; |
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311 |
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312 } |
| 294 | 313 } |
| 314 | |
|
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315 |
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316 /* s.accept() method */ |
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317 |
| 294 | 318 static object * |
| 319 sock_accept(s, args) | |
| 320 sockobject *s; | |
| 321 object *args; | |
| 322 { | |
| 323 char addrbuf[256]; | |
| 324 int addrlen, newfd; | |
| 325 object *res; | |
| 326 if (!getnoarg(args)) | |
| 327 return NULL; | |
| 328 addrlen = sizeof addrbuf; | |
| 329 newfd = accept(s->sock_fd, (struct sockaddr *) addrbuf, &addrlen); | |
| 330 if (newfd < 0) | |
| 331 return socket_error(); | |
|
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332 /* Create the new object with unspecified family, |
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333 to avoid calls to bind() etc. on it. */ |
|
309
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334 res = makepair((object *) newsockobject(newfd, |
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335 s->sock_family, |
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336 s->sock_type, |
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337 s->sock_proto), |
| 294 | 338 makesockaddr((struct sockaddr *) addrbuf, addrlen)); |
| 339 if (res == NULL) | |
| 340 close(newfd); | |
| 341 return res; | |
| 342 } | |
| 343 | |
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344 |
| 396 | 345 /* s.allowbroadcast() method */ |
| 346 | |
| 347 static object * | |
| 348 sock_allowbroadcast(s, args) | |
| 349 sockobject *s; | |
| 350 object *args; | |
| 351 { | |
| 352 int flag; | |
| 353 int res; | |
| 354 if (!getintarg(args, &flag)) | |
| 355 return NULL; | |
| 356 res = setsockopt(s->sock_fd, SOL_SOCKET, SO_BROADCAST, | |
| 357 &flag, sizeof flag); | |
| 358 if (res < 0) | |
| 359 return socket_error(); | |
| 360 INCREF(None); | |
| 361 return None; | |
| 362 } | |
| 363 | |
| 364 | |
|
324
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365 /* s.avail() method */ |
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366 |
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367 static object * |
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368 sock_avail(s, args) |
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369 sockobject *s; |
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370 object *args; |
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371 { |
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372 struct timeval timeout; |
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373 fd_set readers; |
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374 int n; |
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375 timeout.tv_sec = 0; |
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376 timeout.tv_usec = 0; |
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377 FD_ZERO(&readers); |
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378 FD_SET(s->sock_fd, &readers); |
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379 n = select(s->sock_fd+1, &readers, (fd_set *)0, (fd_set *)0, &timeout); |
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380 if (n < 0) |
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381 return socket_error(); |
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382 return newintobject((long) (n != 0)); |
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383 } |
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384 |
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385 |
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386 /* s.bind(sockaddr) method */ |
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387 |
| 294 | 388 static object * |
| 389 sock_bind(s, args) | |
| 390 sockobject *s; | |
| 391 object *args; | |
| 392 { | |
| 393 struct sockaddr *addr; | |
| 394 int addrlen; | |
| 395 if (!getsockaddrarg(s, args, &addr, &addrlen)) | |
| 396 return NULL; | |
| 397 if (bind(s->sock_fd, addr, addrlen) < 0) | |
| 398 return socket_error(); | |
| 399 INCREF(None); | |
| 400 return None; | |
| 401 } | |
| 402 | |
|
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403 |
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404 /* s.close() method. |
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405 Set the file descriptor to -1 so operations tried subsequently |
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406 will surely fail. */ |
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407 |
| 294 | 408 static object * |
| 409 sock_close(s, args) | |
| 410 sockobject *s; | |
| 411 object *args; | |
| 412 { | |
| 413 if (!getnoarg(args)) | |
| 414 return NULL; | |
| 415 (void) close(s->sock_fd); | |
| 416 s->sock_fd = -1; | |
| 417 INCREF(None); | |
| 418 return None; | |
| 419 } | |
| 420 | |
|
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421 |
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422 /* s.connect(sockaddr) method */ |
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423 |
| 294 | 424 static object * |
| 425 sock_connect(s, args) | |
| 426 sockobject *s; | |
| 427 object *args; | |
| 428 { | |
| 429 struct sockaddr *addr; | |
| 430 int addrlen; | |
| 431 if (!getsockaddrarg(s, args, &addr, &addrlen)) | |
| 432 return NULL; | |
| 433 if (connect(s->sock_fd, addr, addrlen) < 0) | |
| 434 return socket_error(); | |
| 435 INCREF(None); | |
| 436 return None; | |
| 437 } | |
| 438 | |
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439 |
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440 /* s.listen(n) method */ |
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441 |
| 294 | 442 static object * |
| 443 sock_listen(s, args) | |
| 444 sockobject *s; | |
| 445 object *args; | |
| 446 { | |
| 447 int backlog; | |
| 448 if (!getintarg(args, &backlog)) | |
| 449 return NULL; | |
| 450 if (listen(s->sock_fd, backlog) < 0) | |
| 451 return socket_error(); | |
| 452 INCREF(None); | |
| 453 return None; | |
| 454 } | |
| 455 | |
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456 |
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457 /* s.makefile(mode) method. |
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458 Create a new open file object referring to a dupped version of |
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459 the socket's file descriptor. (The dup() call is necessary so |
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460 that the open file and socket objects may be closed independent |
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461 of each other.) |
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462 The mode argument specifies 'r' or 'w' passed to fdopen(). */ |
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463 |
| 294 | 464 static object * |
|
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465 sock_makefile(s, args) |
| 294 | 466 sockobject *s; |
| 467 object *args; | |
| 468 { | |
|
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469 extern int fclose PROTO((FILE *)); |
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470 object *mode; |
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471 int fd; |
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472 FILE *fp; |
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473 if (!getstrarg(args, &mode)) |
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474 return NULL; |
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475 if ((fd = dup(s->sock_fd)) < 0 || |
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476 (fp = fdopen(fd, getstringvalue(mode))) == NULL) |
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477 return socket_error(); |
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478 return newopenfileobject(fp, "<socket>", getstringvalue(mode), fclose); |
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479 } |
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480 |
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481 |
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482 /* s.recv(nbytes) method */ |
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483 |
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484 static object * |
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485 sock_recv(s, args) |
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486 sockobject *s; |
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487 object *args; |
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488 { |
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489 int len, n, flags; |
| 294 | 490 object *buf; |
|
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491 if (!getintintarg(args, &len, &flags)) { |
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492 err_clear(); |
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493 if (!getintarg(args, &len)) |
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494 return NULL; |
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495 flags = 0; |
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496 } |
| 294 | 497 buf = newsizedstringobject((char *) 0, len); |
| 498 if (buf == NULL) | |
| 499 return NULL; | |
|
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500 n = recv(s->sock_fd, getstringvalue(buf), len, flags); |
| 294 | 501 if (n < 0) |
| 502 return socket_error(); | |
| 503 if (resizestring(&buf, n) < 0) | |
| 504 return NULL; | |
| 505 return buf; | |
| 506 } | |
| 507 | |
|
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508 |
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509 /* s.recvfrom(nbytes) method */ |
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510 |
| 294 | 511 static object * |
| 512 sock_recvfrom(s, args) | |
| 513 sockobject *s; | |
| 514 object *args; | |
| 515 { | |
| 516 char addrbuf[256]; | |
| 517 object *buf; | |
| 518 int addrlen, len, n; | |
| 519 if (!getintarg(args, &len)) | |
| 520 return NULL; | |
| 521 buf = newsizedstringobject((char *) 0, len); | |
| 522 addrlen = sizeof addrbuf; | |
| 523 n = recvfrom(s->sock_fd, getstringvalue(buf), len, 0, | |
| 524 addrbuf, &addrlen); | |
| 525 if (n < 0) | |
| 526 return socket_error(); | |
| 527 if (resizestring(&buf, n) < 0) | |
| 528 return NULL; | |
| 529 return makepair(buf, makesockaddr(addrbuf, addrlen)); | |
| 530 } | |
| 531 | |
|
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532 |
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533 /* s.send(data) method */ |
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534 |
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535 static object * |
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536 sock_send(s, args) |
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537 sockobject *s; |
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538 object *args; |
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539 { |
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540 object *buf; |
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541 int len, n, flags; |
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542 if (!getstrintarg(args, &buf, &flags)) { |
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543 err_clear(); |
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544 if (!getstrarg(args, &buf)) |
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545 return NULL; |
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546 flags = 0; |
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547 } |
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548 len = getstringsize(buf); |
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549 n = send(s->sock_fd, getstringvalue(buf), len, flags); |
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550 if (n < 0) |
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551 return socket_error(); |
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552 INCREF(None); |
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553 return None; |
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554 } |
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555 |
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556 |
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557 /* s.sendto(data, sockaddr) method */ |
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558 |
| 294 | 559 static object * |
| 560 sock_sendto(s, args) | |
| 561 sockobject *s; | |
| 562 object *args; | |
| 563 { | |
| 564 object *buf; | |
| 565 struct sockaddr *addr; | |
| 566 int addrlen, len, n; | |
| 567 if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) { | |
| 568 err_badarg(); | |
| 569 return NULL; | |
| 570 } | |
| 571 if (!getstrarg(gettupleitem(args, 0), &buf) || | |
| 572 !getsockaddrarg(s, gettupleitem(args, 1), &addr, &addrlen)) | |
| 573 return NULL; | |
| 574 len = getstringsize(buf); | |
| 575 n = sendto(s->sock_fd, getstringvalue(buf), len, 0, | |
| 576 addr, addrlen); | |
| 577 if (n < 0) | |
| 578 return socket_error(); | |
|
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579 INCREF(None); |
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580 return None; |
| 294 | 581 } |
| 582 | |
|
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583 |
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584 /* s.shutdown(how) method */ |
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585 |
| 294 | 586 static object * |
| 587 sock_shutdown(s, args) | |
| 588 sockobject *s; | |
| 589 object *args; | |
| 590 { | |
| 591 int how; | |
| 592 if (!getintarg(args, &how)) | |
| 593 return NULL; | |
| 594 if (shutdown(s->sock_fd, how) < 0) | |
| 595 return socket_error(); | |
| 596 INCREF(None); | |
| 597 return None; | |
| 598 } | |
| 599 | |
|
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600 |
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|
601 /* List of methods for socket objects */ |
| 294 | 602 |
| 603 static struct methodlist sock_methods[] = { | |
| 604 {"accept", sock_accept}, | |
|
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605 {"avail", sock_avail}, |
| 396 | 606 {"allowbroadcast", sock_allowbroadcast}, |
| 294 | 607 {"bind", sock_bind}, |
| 608 {"close", sock_close}, | |
| 609 {"connect", sock_connect}, | |
| 610 {"listen", sock_listen}, | |
|
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611 {"makefile", sock_makefile}, |
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612 {"recv", sock_recv}, |
| 294 | 613 {"recvfrom", sock_recvfrom}, |
|
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614 {"send", sock_send}, |
| 294 | 615 {"sendto", sock_sendto}, |
| 616 {"shutdown", sock_shutdown}, | |
| 617 {NULL, NULL} /* sentinel */ | |
| 618 }; | |
| 619 | |
|
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620 |
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621 /* Deallocate a socket object in response to the last DECREF(). |
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622 First close the file description. */ |
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623 |
| 294 | 624 static void |
| 625 sock_dealloc(s) | |
| 626 sockobject *s; | |
| 627 { | |
| 628 (void) close(s->sock_fd); | |
| 629 DEL(s); | |
| 630 } | |
| 631 | |
|
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632 |
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633 /* Return a socket object's named attribute. */ |
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634 |
| 294 | 635 static object * |
| 636 sock_getattr(s, name) | |
| 637 sockobject *s; | |
| 638 char *name; | |
| 639 { | |
| 640 return findmethod(sock_methods, (object *) s, name); | |
| 641 } | |
| 642 | |
|
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643 |
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644 /* Type object for socket objects. |
|
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Make Socktype global so old and new compilers will like it.
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645 XXX This should be static, but some compilers don't grok the |
|
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646 XXX forward reference to it in that case... */ |
|
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647 |
|
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648 typeobject Socktype = { |
| 294 | 649 OB_HEAD_INIT(&Typetype) |
| 650 0, | |
| 651 "socket", | |
| 652 sizeof(sockobject), | |
| 653 0, | |
| 654 sock_dealloc, /*tp_dealloc*/ | |
| 655 0, /*tp_print*/ | |
| 656 sock_getattr, /*tp_getattr*/ | |
| 657 0, /*tp_setattr*/ | |
| 658 0, /*tp_compare*/ | |
| 659 0, /*tp_repr*/ | |
| 660 0, /*tp_as_number*/ | |
| 661 0, /*tp_as_sequence*/ | |
| 662 0, /*tp_as_mapping*/ | |
| 663 }; | |
| 664 | |
|
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665 |
|
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666 /* Python interface to gethostname(). */ |
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667 |
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668 /*ARGSUSED*/ |
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669 static object * |
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670 socket_gethostname(self, args) |
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671 object *self; |
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672 object *args; |
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673 { |
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674 char buf[1024]; |
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675 if (!getnoarg(args)) |
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676 return NULL; |
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677 if (gethostname(buf, sizeof buf - 1) < 0) |
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678 return socket_error(); |
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679 buf[sizeof buf - 1] = '\0'; |
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680 return newstringobject(buf); |
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|
681 } |
|
295
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|
682 /* Python interface to gethostbyname(name). */ |
|
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683 |
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|
684 /*ARGSUSED*/ |
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685 static object * |
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|
686 socket_gethostbyname(self, args) |
|
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687 object *self; |
|
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688 object *args; |
|
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|
689 { |
|
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|
690 object *name; |
|
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691 struct hostent *hp; |
|
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diff
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692 struct sockaddr_in addrbuf; |
|
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|
693 if (!getstrarg(args, &name)) |
|
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diff
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|
694 return NULL; |
|
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diff
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|
695 if (setipaddr(getstringvalue(name), &addrbuf) < 0) |
|
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|
696 return NULL; |
|
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|
697 return makeipaddr(&addrbuf); |
|
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diff
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|
698 } |
|
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diff
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|
699 |
|
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diff
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|
700 |
|
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diff
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|
701 /* Python interface to getservbyname(name). |
|
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diff
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|
702 This only returns the port number, since the other info is already |
|
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diff
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|
703 known or not useful (like the list of aliases). */ |
|
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diff
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|
704 |
|
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|
705 /*ARGSUSED*/ |
|
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diff
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|
706 static object * |
|
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294
diff
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|
707 socket_getservbyname(self, args) |
|
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diff
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|
708 object *self; |
|
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diff
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|
709 object *args; |
|
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294
diff
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|
710 { |
|
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294
diff
changeset
|
711 object *name, *proto; |
|
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diff
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|
712 struct servent *sp; |
|
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diff
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|
713 if (!getstrstrarg(args, &name, &proto)) |
|
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diff
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|
714 return NULL; |
|
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diff
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|
715 sp = getservbyname(getstringvalue(name), getstringvalue(proto)); |
|
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diff
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|
716 if (sp == NULL) { |
|
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diff
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|
717 err_setstr(SocketError, "service/proto not found"); |
|
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diff
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|
718 return NULL; |
|
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Guido van Rossum <guido@python.org>
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diff
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|
719 } |
|
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294
diff
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|
720 return newintobject((long) ntohs(sp->s_port)); |
|
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diff
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|
721 } |
|
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diff
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|
722 |
|
d7a38dece86a
Many changes to the interface, and added comments.
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diff
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|
723 |
|
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Many changes to the interface, and added comments.
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diff
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|
724 /* Python interface to socket(family, type, proto). |
|
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|
725 The third (protocol) argument is optional. |
|
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|
726 Return a new socket object. */ |
|
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|
727 |
| 294 | 728 /*ARGSUSED*/ |
| 729 static object * | |
| 730 socket_socket(self, args) | |
| 731 object *self; | |
| 732 object *args; | |
| 733 { | |
| 734 sockobject *s; | |
| 735 int family, type, proto, fd; | |
|
295
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|
736 if (args != NULL && is_tupleobject(args) && gettuplesize(args) == 3) { |
|
309
382323f92fce
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diff
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|
737 if (!getintintintarg(args, &family, &type, &proto)) |
|
295
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|
738 return NULL; |
|
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|
739 } |
|
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diff
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|
740 else { |
|
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diff
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|
741 if (!getintintarg(args, &family, &type)) |
|
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|
742 return NULL; |
|
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|
743 proto = 0; |
|
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diff
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|
744 } |
| 294 | 745 fd = socket(family, type, proto); |
| 746 if (fd < 0) | |
| 747 return socket_error(); | |
| 748 s = newsockobject(fd, family, type, proto); | |
|
295
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|
749 /* If the object can't be created, don't forget to close the |
|
d7a38dece86a
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diff
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|
750 file descriptor again! */ |
| 294 | 751 if (s == NULL) |
|
295
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diff
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|
752 (void) close(fd); |
|
324
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Add gethostname() and s.avail().
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|
753 /* From now on, ignore SIGPIPE and let the error checking |
|
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Add gethostname() and s.avail().
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|
754 do the work. */ |
|
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Add gethostname() and s.avail().
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|
755 (void) signal(SIGPIPE, SIG_IGN); |
| 294 | 756 return (object *) s; |
| 757 } | |
| 758 | |
|
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diff
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|
759 |
|
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diff
changeset
|
760 /* List of functions exported by this module. */ |
|
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diff
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|
761 |
| 294 | 762 static struct methodlist socket_methods[] = { |
|
295
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|
763 {"gethostbyname", socket_gethostbyname}, |
|
324
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|
764 {"gethostname", socket_gethostname}, |
|
295
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|
765 {"getservbyname", socket_getservbyname}, |
|
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|
766 {"socket", socket_socket}, |
|
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diff
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|
767 {NULL, NULL} /* Sentinel */ |
| 294 | 768 }; |
| 769 | |
|
295
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|
770 |
|
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diff
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|
771 /* Convenience routine to export an integer value. |
|
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|
772 For simplicity, errors (which are unlikely anyway) are ignored. */ |
|
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|
773 |
| 294 | 774 static void |
| 775 insint(d, name, value) | |
| 776 object *d; | |
| 777 char *name; | |
| 778 int value; | |
| 779 { | |
| 780 object *v = newintobject((long) value); | |
| 781 if (v == NULL) { | |
| 782 /* Don't bother reporting this error */ | |
| 783 err_clear(); | |
| 784 } | |
| 785 else { | |
| 786 dictinsert(d, name, v); | |
| 787 DECREF(v); | |
| 788 } | |
| 789 } | |
| 790 | |
|
295
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|
791 |
|
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diff
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|
792 /* Initialize this module. |
|
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|
793 This is called when the first 'import socket' is done, |
|
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|
794 via a table in config.c, if config.c is compiled with USE_SOCKET |
|
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|
795 defined. */ |
|
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|
796 |
| 294 | 797 void |
| 798 initsocket() | |
| 799 { | |
| 800 object *m, *d; | |
| 801 | |
| 802 m = initmodule("socket", socket_methods); | |
| 803 d = getmoduledict(m); | |
| 804 SocketError = newstringobject("socket.error"); | |
| 805 if (SocketError == NULL || dictinsert(d, "error", SocketError) != 0) | |
| 806 fatal("can't define socket.error"); | |
| 807 insint(d, "AF_INET", AF_INET); | |
| 808 insint(d, "AF_UNIX", AF_UNIX); | |
| 809 insint(d, "SOCK_STREAM", SOCK_STREAM); | |
| 810 insint(d, "SOCK_DGRAM", SOCK_DGRAM); | |
| 811 insint(d, "SOCK_RAW", SOCK_RAW); | |
| 812 insint(d, "SOCK_SEQPACKET", SOCK_SEQPACKET); | |
| 813 insint(d, "SOCK_RDM", SOCK_RDM); | |
| 814 } |