Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 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 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 32 | - only AF_INET and AF_UNIX address families are supported |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 33 | - no asynchronous I/O |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 34 | - no read/write operations (use send/recv instead) |
| 35 | - no flags on send/recv operations |
| 36 | - no setsockopt() call |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 37 | |
| 38 | Interface: |
| 39 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 40 | - socket.gethostbyname(hostname) --> host IP address (string: 'dd.dd.dd.dd') |
| 41 | - socket.getservbyname(server, type) --> port number |
| 42 | - socket.socket(family, type) --> new socket object |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 43 | - family and type constants from <socket.h> are accessed as socket.AF_INET etc. |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 44 | - errors are reported as the exception socket.error |
| 45 | - an Internet socket address is a pair (hostname, port) |
| 46 | where hostname can be anything recognized by gethostbyname() |
| 47 | (including the dd.dd.dd.dd notation) and port is in host byte order |
| 48 | - where a hostname is returned, the dd.dd.dd.dd notation is used |
| 49 | - a UNIX domain socket is a string specifying the pathname |
| 50 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 51 | Socket methods: |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 52 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 53 | - s.bind(sockaddr) --> None |
| 54 | - s.connect(sockaddr) --> None |
| 55 | - s.accept() --> new socket object, sockaddr |
| 56 | - s.listen(n) --> None |
| 57 | - s.makefile(mode) --> file object |
| 58 | - s.recv(nbytes) --> string |
| 59 | - s.recvfrom(nbytes) --> string, sockaddr |
| 60 | - s.send(string) --> None |
| 61 | - s.sendto(string, sockaddr) --> None |
| 62 | - s.shutdown(how) --> None |
| 63 | - s.close() --> None |
| 64 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 65 | */ |
| 66 | |
| 67 | #include "allobjects.h" |
| 68 | #include "modsupport.h" |
| 69 | |
| 70 | #include <sys/types.h> |
| 71 | #include <sys/socket.h> |
| 72 | #include <netinet/in.h> |
| 73 | #include <sys/un.h> |
| 74 | #include <netdb.h> |
| 75 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 76 | |
| 77 | /* Global variable holding the exception type for errors detected |
| 78 | by this module (but not argument type or memory errors, etc.). */ |
| 79 | |
| 80 | static object *SocketError; |
| 81 | |
| 82 | |
| 83 | /* Convenience function to raise an error according to errno |
| 84 | and return a NULL pointer from a function. */ |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 85 | |
| 86 | static object * |
| 87 | socket_error() |
| 88 | { |
| 89 | return err_errno(SocketError); |
| 90 | } |
| 91 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 92 | |
| 93 | /* The object holding a socket. It holds some extra information, |
| 94 | like the address family, which is used to decode socket address |
| 95 | arguments properly. */ |
| 96 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 97 | typedef struct { |
| 98 | OB_HEAD |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 99 | int sock_fd; /* Socket file descriptor */ |
| 100 | int sock_family; /* Address family, e.g., AF_INET */ |
| 101 | int sock_type; /* Socket type, e.g., SOCK_STREAM */ |
| 102 | int sock_proto; /* Protocol type, usually 0 */ |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 103 | } sockobject; |
| 104 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 105 | |
| 106 | /* A forward reference to the Socktype type object. |
| 107 | The Socktype variable contains pointers to various functions, |
| 108 | some of which call newsocobject(), which uses Socktype, so |
| 109 | there has to be a circular reference. If your compiler complains |
| 110 | that it is first declared 'extern' and later 'static', remove the |
| 111 | 'static' keyword from the actual definition. */ |
| 112 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 113 | extern typeobject Socktype; /* Forward */ |
| 114 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 115 | |
| 116 | /* Create a new socket object. |
| 117 | This just creates the object and initializes it. |
| 118 | If the creation fails, return NULL and set an exception (implicit |
| 119 | in NEWOBJ()). */ |
| 120 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 121 | static sockobject * |
| 122 | newsockobject(fd, family, type, proto) |
| 123 | int fd, family, type, proto; |
| 124 | { |
| 125 | sockobject *s; |
| 126 | s = NEWOBJ(sockobject, &Socktype); |
| 127 | if (s != NULL) { |
| 128 | s->sock_fd = fd; |
| 129 | s->sock_family = family; |
| 130 | s->sock_type = type; |
| 131 | s->sock_proto = proto; |
| 132 | } |
| 133 | return s; |
| 134 | } |
| 135 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 136 | |
| 137 | /* Convert a string specifying a host name or one of a few symbolic |
| 138 | names to a numeric IP address. This usually calls gethostbyname() |
| 139 | to do the work; the names "" and "<broadcast>" are special. |
| 140 | Return the length (should always be 4 bytes), or negative if |
| 141 | an error occurred; then an exception is raised. */ |
| 142 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 143 | static int |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 144 | setipaddr(name, addr_ret) |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 145 | char *name; |
| 146 | struct sockaddr_in *addr_ret; |
| 147 | { |
| 148 | struct hostent *hp; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 149 | int d1, d2, d3, d4; |
| 150 | char ch; |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 151 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 152 | if (name[0] == '\0') { |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 153 | addr_ret->sin_addr.s_addr = INADDR_ANY; |
| 154 | return 4; |
| 155 | } |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 156 | if (name[0] == '<' && strcmp(name, "<broadcast>") == 0) { |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 157 | addr_ret->sin_addr.s_addr = INADDR_BROADCAST; |
| 158 | return 4; |
| 159 | } |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 160 | if (sscanf(name, "%d.%d.%d.%d%c", &d1, &d2, &d3, &d4, &ch) == 4 && |
| 161 | 0 <= d1 && d1 <= 255 && 0 <= d2 && d2 <= 255 && |
| 162 | 0 <= d3 && d3 <= 255 && 0 <= d4 && d4 <= 255) { |
| 163 | addr_ret->sin_addr.s_addr = htonl( |
| 164 | ((long) d1 << 24) | ((long) d2 << 16) | |
| 165 | ((long) d3 << 8) | ((long) d4 << 0)); |
| 166 | return 4; |
| 167 | } |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 168 | hp = gethostbyname(name); |
| 169 | if (hp == NULL) { |
| 170 | err_setstr(SocketError, "host not found"); |
| 171 | return -1; |
| 172 | } |
| 173 | memcpy((char *) &addr_ret->sin_addr, hp->h_addr, hp->h_length); |
| 174 | return hp->h_length; |
| 175 | } |
| 176 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 177 | |
| 178 | /* Generally useful convenience function to create a tuple from two |
| 179 | objects. This eats references to the objects; if either is NULL |
| 180 | it destroys the other and returns NULL without raising an exception |
| 181 | (assuming the function that was called to create the argument must |
| 182 | have raised an exception and returned NULL). */ |
| 183 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 184 | static object * |
| 185 | makepair(a, b) |
| 186 | object *a, *b; |
| 187 | { |
| 188 | object *pair = NULL; |
| 189 | if (a == NULL || b == NULL || (pair = newtupleobject(2)) == NULL) { |
| 190 | XDECREF(a); |
| 191 | XDECREF(b); |
| 192 | return NULL; |
| 193 | } |
| 194 | settupleitem(pair, 0, a); |
| 195 | settupleitem(pair, 1, b); |
| 196 | return pair; |
| 197 | } |
| 198 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 199 | |
| 200 | /* Create a string object representing an IP address. |
| 201 | This is always a string of the form 'dd.dd.dd.dd' (with variable |
| 202 | size numbers). */ |
| 203 | |
| 204 | static object * |
| 205 | makeipaddr(addr) |
| 206 | struct sockaddr_in *addr; |
| 207 | { |
| 208 | long x = ntohl(addr->sin_addr.s_addr); |
| 209 | char buf[100]; |
| 210 | sprintf(buf, "%d.%d.%d.%d", |
| 211 | (int) (x>>24) & 0xff, (int) (x>>16) & 0xff, |
| 212 | (int) (x>> 8) & 0xff, (int) (x>> 0) & 0xff); |
| 213 | return newstringobject(buf); |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /* Create an object representing the given socket address, |
| 218 | suitable for passing it back to bind(), connect() etc. |
| 219 | The family field of the sockaddr structure is inspected |
| 220 | to determine what kind of address it really is. */ |
| 221 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 222 | /*ARGSUSED*/ |
| 223 | static object * |
| 224 | makesockaddr(addr, addrlen) |
| 225 | struct sockaddr *addr; |
| 226 | int addrlen; |
| 227 | { |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 228 | switch (addr->sa_family) { |
| 229 | |
| 230 | case AF_INET: |
| 231 | { |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 232 | struct sockaddr_in *a = (struct sockaddr_in *) addr; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 233 | return makepair(makeipaddr(a), |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 234 | newintobject((long) ntohs(a->sin_port))); |
| 235 | } |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 236 | |
| 237 | case AF_UNIX: |
| 238 | { |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 239 | struct sockaddr_un *a = (struct sockaddr_un *) addr; |
| 240 | return newstringobject(a->sun_path); |
| 241 | } |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 242 | |
| 243 | /* More cases here... */ |
| 244 | |
| 245 | default: |
| 246 | err_setstr(SocketError, "return unknown socket address type"); |
| 247 | return NULL; |
| 248 | } |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 249 | } |
| 250 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 251 | |
| 252 | /* Parse a socket address argument according to the socket object's |
| 253 | address family. Return 1 if the address was in the proper format, |
| 254 | 0 of not. The address is returned through addr_ret, its length |
| 255 | through len_ret. */ |
| 256 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 257 | static int |
| 258 | getsockaddrarg(s, args, addr_ret, len_ret) |
| 259 | sockobject *s; |
| 260 | object *args; |
| 261 | struct sockaddr **addr_ret; |
| 262 | int *len_ret; |
| 263 | { |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 264 | switch (s->sock_family) { |
| 265 | |
| 266 | case AF_UNIX: |
| 267 | { |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 268 | static struct sockaddr_un addr; |
| 269 | object *path; |
| 270 | int len; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 271 | if (!getstrarg(args, &path)) |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 272 | return 0; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 273 | if ((len = getstringsize(path)) > sizeof addr.sun_path) { |
| 274 | err_setstr(SocketError, "AF_UNIX path too long"); |
| 275 | return 0; |
| 276 | } |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 277 | addr.sun_family = AF_UNIX; |
| 278 | memcpy(addr.sun_path, getstringvalue(path), len); |
| 279 | *addr_ret = (struct sockaddr *) &addr; |
| 280 | *len_ret = len + sizeof addr.sun_family; |
| 281 | return 1; |
| 282 | } |
| 283 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 284 | case AF_INET: |
| 285 | { |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 286 | static struct sockaddr_in addr; |
| 287 | object *host; |
| 288 | int port; |
| 289 | if (!getstrintarg(args, &host, &port)) |
| 290 | return 0; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 291 | if (setipaddr(getstringvalue(host), &addr) < 0) |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 292 | return 0; |
| 293 | addr.sin_family = AF_INET; |
| 294 | addr.sin_port = htons(port); |
| 295 | *addr_ret = (struct sockaddr *) &addr; |
| 296 | *len_ret = sizeof addr; |
| 297 | return 1; |
| 298 | } |
| 299 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 300 | /* More cases here... */ |
| 301 | |
| 302 | default: |
| 303 | err_setstr(SocketError, "getsockaddrarg: bad family"); |
| 304 | return 0; |
| 305 | |
| 306 | } |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 307 | } |
| 308 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 309 | |
| 310 | /* s.accept() method */ |
| 311 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 312 | static object * |
| 313 | sock_accept(s, args) |
| 314 | sockobject *s; |
| 315 | object *args; |
| 316 | { |
| 317 | char addrbuf[256]; |
| 318 | int addrlen, newfd; |
| 319 | object *res; |
| 320 | if (!getnoarg(args)) |
| 321 | return NULL; |
| 322 | addrlen = sizeof addrbuf; |
| 323 | newfd = accept(s->sock_fd, (struct sockaddr *) addrbuf, &addrlen); |
| 324 | if (newfd < 0) |
| 325 | return socket_error(); |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 326 | /* Create the new object with unspecified family, |
| 327 | to avoid calls to bind() etc. on it. */ |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 328 | res = makepair((object *) newsockobject(newfd, AF_UNSPEC, 0, 0), |
| 329 | makesockaddr((struct sockaddr *) addrbuf, addrlen)); |
| 330 | if (res == NULL) |
| 331 | close(newfd); |
| 332 | return res; |
| 333 | } |
| 334 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 335 | |
| 336 | /* s.bind(sockaddr) method */ |
| 337 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 338 | static object * |
| 339 | sock_bind(s, args) |
| 340 | sockobject *s; |
| 341 | object *args; |
| 342 | { |
| 343 | struct sockaddr *addr; |
| 344 | int addrlen; |
| 345 | if (!getsockaddrarg(s, args, &addr, &addrlen)) |
| 346 | return NULL; |
| 347 | if (bind(s->sock_fd, addr, addrlen) < 0) |
| 348 | return socket_error(); |
| 349 | INCREF(None); |
| 350 | return None; |
| 351 | } |
| 352 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 353 | |
| 354 | /* s.close() method. |
| 355 | Set the file descriptor to -1 so operations tried subsequently |
| 356 | will surely fail. */ |
| 357 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 358 | static object * |
| 359 | sock_close(s, args) |
| 360 | sockobject *s; |
| 361 | object *args; |
| 362 | { |
| 363 | if (!getnoarg(args)) |
| 364 | return NULL; |
| 365 | (void) close(s->sock_fd); |
| 366 | s->sock_fd = -1; |
| 367 | INCREF(None); |
| 368 | return None; |
| 369 | } |
| 370 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 371 | |
| 372 | /* s.connect(sockaddr) method */ |
| 373 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 374 | static object * |
| 375 | sock_connect(s, args) |
| 376 | sockobject *s; |
| 377 | object *args; |
| 378 | { |
| 379 | struct sockaddr *addr; |
| 380 | int addrlen; |
| 381 | if (!getsockaddrarg(s, args, &addr, &addrlen)) |
| 382 | return NULL; |
| 383 | if (connect(s->sock_fd, addr, addrlen) < 0) |
| 384 | return socket_error(); |
| 385 | INCREF(None); |
| 386 | return None; |
| 387 | } |
| 388 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 389 | |
| 390 | /* s.listen(n) method */ |
| 391 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 392 | static object * |
| 393 | sock_listen(s, args) |
| 394 | sockobject *s; |
| 395 | object *args; |
| 396 | { |
| 397 | int backlog; |
| 398 | if (!getintarg(args, &backlog)) |
| 399 | return NULL; |
| 400 | if (listen(s->sock_fd, backlog) < 0) |
| 401 | return socket_error(); |
| 402 | INCREF(None); |
| 403 | return None; |
| 404 | } |
| 405 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 406 | |
| 407 | /* s.makefile(mode) method. |
| 408 | Create a new open file object referring to a dupped version of |
| 409 | the socket's file descriptor. (The dup() call is necessary so |
| 410 | that the open file and socket objects may be closed independent |
| 411 | of each other.) |
| 412 | The mode argument specifies 'r' or 'w' passed to fdopen(). */ |
| 413 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 414 | static object * |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 415 | sock_makefile(s, args) |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 416 | sockobject *s; |
| 417 | object *args; |
| 418 | { |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 419 | extern int fclose PROTO((FILE *)); |
| 420 | object *mode; |
| 421 | int fd; |
| 422 | FILE *fp; |
| 423 | if (!getstrarg(args, &mode)) |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 424 | return NULL; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 425 | if ((fd = dup(s->sock_fd)) < 0 || |
| 426 | (fp = fdopen(fd, getstringvalue(mode))) == NULL) |
| 427 | return socket_error(); |
| 428 | return newopenfileobject(fp, "<socket>", getstringvalue(mode), fclose); |
| 429 | } |
| 430 | |
| 431 | |
| 432 | /* s.recv(nbytes) method */ |
| 433 | |
| 434 | static object * |
| 435 | sock_recv(s, args) |
| 436 | sockobject *s; |
| 437 | object *args; |
| 438 | { |
| 439 | int len, n, flags; |
| 440 | object *buf; |
| 441 | if (!getintintarg(args, &len, &flags)) { |
| 442 | err_clear(); |
| 443 | if (!getintarg(args, &len)) |
| 444 | return NULL; |
| 445 | flags = 0; |
| 446 | } |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 447 | buf = newsizedstringobject((char *) 0, len); |
| 448 | if (buf == NULL) |
| 449 | return NULL; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 450 | n = recv(s->sock_fd, getstringvalue(buf), len, flags); |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 451 | if (n < 0) |
| 452 | return socket_error(); |
| 453 | if (resizestring(&buf, n) < 0) |
| 454 | return NULL; |
| 455 | return buf; |
| 456 | } |
| 457 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 458 | |
| 459 | /* s.recvfrom(nbytes) method */ |
| 460 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 461 | static object * |
| 462 | sock_recvfrom(s, args) |
| 463 | sockobject *s; |
| 464 | object *args; |
| 465 | { |
| 466 | char addrbuf[256]; |
| 467 | object *buf; |
| 468 | int addrlen, len, n; |
| 469 | if (!getintarg(args, &len)) |
| 470 | return NULL; |
| 471 | buf = newsizedstringobject((char *) 0, len); |
| 472 | addrlen = sizeof addrbuf; |
| 473 | n = recvfrom(s->sock_fd, getstringvalue(buf), len, 0, |
| 474 | addrbuf, &addrlen); |
| 475 | if (n < 0) |
| 476 | return socket_error(); |
| 477 | if (resizestring(&buf, n) < 0) |
| 478 | return NULL; |
| 479 | return makepair(buf, makesockaddr(addrbuf, addrlen)); |
| 480 | } |
| 481 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 482 | |
| 483 | /* s.send(data) method */ |
| 484 | |
| 485 | static object * |
| 486 | sock_send(s, args) |
| 487 | sockobject *s; |
| 488 | object *args; |
| 489 | { |
| 490 | object *buf; |
| 491 | int len, n, flags; |
| 492 | if (!getstrintarg(args, &buf, &flags)) { |
| 493 | err_clear(); |
| 494 | if (!getstrarg(args, &buf)) |
| 495 | return NULL; |
| 496 | flags = 0; |
| 497 | } |
| 498 | len = getstringsize(buf); |
| 499 | n = send(s->sock_fd, getstringvalue(buf), len, flags); |
| 500 | if (n < 0) |
| 501 | return socket_error(); |
| 502 | INCREF(None); |
| 503 | return None; |
| 504 | } |
| 505 | |
| 506 | |
| 507 | /* s.sendto(data, sockaddr) method */ |
| 508 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 509 | static object * |
| 510 | sock_sendto(s, args) |
| 511 | sockobject *s; |
| 512 | object *args; |
| 513 | { |
| 514 | object *buf; |
| 515 | struct sockaddr *addr; |
| 516 | int addrlen, len, n; |
| 517 | if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) { |
| 518 | err_badarg(); |
| 519 | return NULL; |
| 520 | } |
| 521 | if (!getstrarg(gettupleitem(args, 0), &buf) || |
| 522 | !getsockaddrarg(s, gettupleitem(args, 1), &addr, &addrlen)) |
| 523 | return NULL; |
| 524 | len = getstringsize(buf); |
| 525 | n = sendto(s->sock_fd, getstringvalue(buf), len, 0, |
| 526 | addr, addrlen); |
| 527 | if (n < 0) |
| 528 | return socket_error(); |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 529 | INCREF(None); |
| 530 | return None; |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 531 | } |
| 532 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 533 | |
| 534 | /* s.shutdown(how) method */ |
| 535 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 536 | static object * |
| 537 | sock_shutdown(s, args) |
| 538 | sockobject *s; |
| 539 | object *args; |
| 540 | { |
| 541 | int how; |
| 542 | if (!getintarg(args, &how)) |
| 543 | return NULL; |
| 544 | if (shutdown(s->sock_fd, how) < 0) |
| 545 | return socket_error(); |
| 546 | INCREF(None); |
| 547 | return None; |
| 548 | } |
| 549 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 550 | |
| 551 | /* List of methods for socket objects */ |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 552 | |
| 553 | static struct methodlist sock_methods[] = { |
| 554 | {"accept", sock_accept}, |
| 555 | {"bind", sock_bind}, |
| 556 | {"close", sock_close}, |
| 557 | {"connect", sock_connect}, |
| 558 | {"listen", sock_listen}, |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 559 | {"makefile", sock_makefile}, |
| 560 | {"recv", sock_recv}, |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 561 | {"recvfrom", sock_recvfrom}, |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 562 | {"send", sock_send}, |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 563 | {"sendto", sock_sendto}, |
| 564 | {"shutdown", sock_shutdown}, |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 565 | {NULL, NULL} /* sentinel */ |
| 566 | }; |
| 567 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 568 | |
| 569 | /* Deallocate a socket object in response to the last DECREF(). |
| 570 | First close the file description. */ |
| 571 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 572 | static void |
| 573 | sock_dealloc(s) |
| 574 | sockobject *s; |
| 575 | { |
| 576 | (void) close(s->sock_fd); |
| 577 | DEL(s); |
| 578 | } |
| 579 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 580 | |
| 581 | /* Return a socket object's named attribute. */ |
| 582 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 583 | static object * |
| 584 | sock_getattr(s, name) |
| 585 | sockobject *s; |
| 586 | char *name; |
| 587 | { |
| 588 | return findmethod(sock_methods, (object *) s, name); |
| 589 | } |
| 590 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 591 | |
| 592 | /* Type object for socket objects. |
| 593 | If your compiler complains that it is first declared 'extern' |
| 594 | and later 'static', remove the 'static' keyword here. */ |
| 595 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 596 | static typeobject Socktype = { |
| 597 | OB_HEAD_INIT(&Typetype) |
| 598 | 0, |
| 599 | "socket", |
| 600 | sizeof(sockobject), |
| 601 | 0, |
| 602 | sock_dealloc, /*tp_dealloc*/ |
| 603 | 0, /*tp_print*/ |
| 604 | sock_getattr, /*tp_getattr*/ |
| 605 | 0, /*tp_setattr*/ |
| 606 | 0, /*tp_compare*/ |
| 607 | 0, /*tp_repr*/ |
| 608 | 0, /*tp_as_number*/ |
| 609 | 0, /*tp_as_sequence*/ |
| 610 | 0, /*tp_as_mapping*/ |
| 611 | }; |
| 612 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 613 | |
| 614 | /* Python interface to gethostbyname(name). */ |
| 615 | |
| 616 | /*ARGSUSED*/ |
| 617 | static object * |
| 618 | socket_gethostbyname(self, args) |
| 619 | object *self; |
| 620 | object *args; |
| 621 | { |
| 622 | object *name; |
| 623 | struct hostent *hp; |
| 624 | struct sockaddr_in addrbuf; |
| 625 | if (!getstrarg(args, &name)) |
| 626 | return NULL; |
| 627 | if (setipaddr(getstringvalue(name), &addrbuf) < 0) |
| 628 | return NULL; |
| 629 | return makeipaddr(&addrbuf); |
| 630 | } |
| 631 | |
| 632 | |
| 633 | /* Python interface to getservbyname(name). |
| 634 | This only returns the port number, since the other info is already |
| 635 | known or not useful (like the list of aliases). */ |
| 636 | |
| 637 | /*ARGSUSED*/ |
| 638 | static object * |
| 639 | socket_getservbyname(self, args) |
| 640 | object *self; |
| 641 | object *args; |
| 642 | { |
| 643 | object *name, *proto; |
| 644 | struct servent *sp; |
| 645 | if (!getstrstrarg(args, &name, &proto)) |
| 646 | return NULL; |
| 647 | sp = getservbyname(getstringvalue(name), getstringvalue(proto)); |
| 648 | if (sp == NULL) { |
| 649 | err_setstr(SocketError, "service/proto not found"); |
| 650 | return NULL; |
| 651 | } |
| 652 | return newintobject((long) ntohs(sp->s_port)); |
| 653 | } |
| 654 | |
| 655 | |
| 656 | /* Python interface to socket(family, type, proto). |
| 657 | The third (protocol) argument is optional. |
| 658 | Return a new socket object. */ |
| 659 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 660 | /*ARGSUSED*/ |
| 661 | static object * |
| 662 | socket_socket(self, args) |
| 663 | object *self; |
| 664 | object *args; |
| 665 | { |
| 666 | sockobject *s; |
| 667 | int family, type, proto, fd; |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 668 | if (args != NULL && is_tupleobject(args) && gettuplesize(args) == 3) { |
| 669 | if (!getintintarg(args, &family, &type, &proto)) |
| 670 | return NULL; |
| 671 | } |
| 672 | else { |
| 673 | if (!getintintarg(args, &family, &type)) |
| 674 | return NULL; |
| 675 | proto = 0; |
| 676 | } |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 677 | fd = socket(family, type, proto); |
| 678 | if (fd < 0) |
| 679 | return socket_error(); |
| 680 | s = newsockobject(fd, family, type, proto); |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 681 | /* If the object can't be created, don't forget to close the |
| 682 | file descriptor again! */ |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 683 | if (s == NULL) |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 684 | (void) close(fd); |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 685 | return (object *) s; |
| 686 | } |
| 687 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 688 | |
| 689 | /* List of functions exported by this module. */ |
| 690 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 691 | static struct methodlist socket_methods[] = { |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 692 | {"gethostbyname", socket_gethostbyname}, |
| 693 | {"getservbyname", socket_getservbyname}, |
| 694 | {"socket", socket_socket}, |
| 695 | {NULL, NULL} /* Sentinel */ |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 696 | }; |
| 697 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 698 | |
| 699 | /* Convenience routine to export an integer value. |
| 700 | For simplicity, errors (which are unlikely anyway) are ignored. */ |
| 701 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 702 | static void |
| 703 | insint(d, name, value) |
| 704 | object *d; |
| 705 | char *name; |
| 706 | int value; |
| 707 | { |
| 708 | object *v = newintobject((long) value); |
| 709 | if (v == NULL) { |
| 710 | /* Don't bother reporting this error */ |
| 711 | err_clear(); |
| 712 | } |
| 713 | else { |
| 714 | dictinsert(d, name, v); |
| 715 | DECREF(v); |
| 716 | } |
| 717 | } |
| 718 | |
Guido van Rossum | 30a685f | 1991-06-27 15:51:29 +0000 | [diff] [blame^] | 719 | |
| 720 | /* Initialize this module. |
| 721 | This is called when the first 'import socket' is done, |
| 722 | via a table in config.c, if config.c is compiled with USE_SOCKET |
| 723 | defined. */ |
| 724 | |
Guido van Rossum | 6574b3e | 1991-06-25 21:36:08 +0000 | [diff] [blame] | 725 | void |
| 726 | initsocket() |
| 727 | { |
| 728 | object *m, *d; |
| 729 | |
| 730 | m = initmodule("socket", socket_methods); |
| 731 | d = getmoduledict(m); |
| 732 | SocketError = newstringobject("socket.error"); |
| 733 | if (SocketError == NULL || dictinsert(d, "error", SocketError) != 0) |
| 734 | fatal("can't define socket.error"); |
| 735 | insint(d, "AF_INET", AF_INET); |
| 736 | insint(d, "AF_UNIX", AF_UNIX); |
| 737 | insint(d, "SOCK_STREAM", SOCK_STREAM); |
| 738 | insint(d, "SOCK_DGRAM", SOCK_DGRAM); |
| 739 | insint(d, "SOCK_RAW", SOCK_RAW); |
| 740 | insint(d, "SOCK_SEQPACKET", SOCK_SEQPACKET); |
| 741 | insint(d, "SOCK_RDM", SOCK_RDM); |
| 742 | } |