source: trunk/essentials/dev-lang/perl/ext/Socket/Socket.xs

Last change on this file was 3181, checked in by bird, 18 years ago

perl 5.8.8
File size: 10.7 KB
Line 
1#define PERL_NO_GET_CONTEXT
2#include "EXTERN.h"
3#include "perl.h"
4#include "XSUB.h"
5
6#include <stddef.h>
7
8#ifndef VMS
9# ifdef I_SYS_TYPES
10# include <sys/types.h>
11# endif
12# if !defined(ultrix) /* Avoid double definition. */
13# include <sys/socket.h>
14# endif
15# if defined(USE_SOCKS) && defined(I_SOCKS)
16# include <socks.h>
17# endif
18# ifdef MPE
19# define PF_INET AF_INET
20# define PF_UNIX AF_UNIX
21# define SOCK_RAW 3
22# endif
23# ifdef I_SYS_UN
24# include <sys/un.h>
25# endif
26/* XXX Configure test for <netinet/in_systm.h needed XXX */
27# if defined(NeXT) || defined(__NeXT__)
28# include <netinet/in_systm.h>
29# endif
30# if defined(__sgi) && !defined(AF_LINK) && defined(PF_LINK) && PF_LINK == AF_LNK
31# undef PF_LINK
32# endif
33# if defined(I_NETINET_IN) || defined(__ultrix__)
34# include <netinet/in.h>
35# endif
36# ifdef I_NETDB
37# if !defined(ultrix) /* Avoid double definition. */
38# include <netdb.h>
39# endif
40# endif
41# ifdef I_ARPA_INET
42# include <arpa/inet.h>
43# endif
44# ifdef I_NETINET_TCP
45# include <netinet/tcp.h>
46# endif
47#else
48# include "sockadapt.h"
49#endif
50
51#ifdef NETWARE
52NETDB_DEFINE_CONTEXT
53NETINET_DEFINE_CONTEXT
54#endif
55
56#ifdef I_SYSUIO
57# include <sys/uio.h>
58#endif
59
60#ifndef AF_NBS
61# undef PF_NBS
62#endif
63
64#ifndef AF_X25
65# undef PF_X25
66#endif
67
68#ifndef INADDR_NONE
69# define INADDR_NONE 0xffffffff
70#endif /* INADDR_NONE */
71#ifndef INADDR_BROADCAST
72# define INADDR_BROADCAST 0xffffffff
73#endif /* INADDR_BROADCAST */
74#ifndef INADDR_LOOPBACK
75# define INADDR_LOOPBACK 0x7F000001
76#endif /* INADDR_LOOPBACK */
77
78#ifndef HAS_INET_ATON
79
80/*
81 * Check whether "cp" is a valid ascii representation
82 * of an Internet address and convert to a binary address.
83 * Returns 1 if the address is valid, 0 if not.
84 * This replaces inet_addr, the return value from which
85 * cannot distinguish between failure and a local broadcast address.
86 */
87static int
88my_inet_aton(register const char *cp, struct in_addr *addr)
89{
90 dTHX;
91 register U32 val;
92 register int base;
93 register char c;
94 int nparts;
95 const char *s;
96 unsigned int parts[4];
97 register unsigned int *pp = parts;
98
99 if (!cp || !*cp)
100 return 0;
101 for (;;) {
102 /*
103 * Collect number up to ``.''.
104 * Values are specified as for C:
105 * 0x=hex, 0=octal, other=decimal.
106 */
107 val = 0; base = 10;
108 if (*cp == '0') {
109 if (*++cp == 'x' || *cp == 'X')
110 base = 16, cp++;
111 else
112 base = 8;
113 }
114 while ((c = *cp) != '\0') {
115 if (isDIGIT(c)) {
116 val = (val * base) + (c - '0');
117 cp++;
118 continue;
119 }
120 if (base == 16 && (s=strchr(PL_hexdigit,c))) {
121 val = (val << 4) +
122 ((s - PL_hexdigit) & 15);
123 cp++;
124 continue;
125 }
126 break;
127 }
128 if (*cp == '.') {
129 /*
130 * Internet format:
131 * a.b.c.d
132 * a.b.c (with c treated as 16-bits)
133 * a.b (with b treated as 24 bits)
134 */
135 if (pp >= parts + 3 || val > 0xff)
136 return 0;
137 *pp++ = val, cp++;
138 } else
139 break;
140 }
141 /*
142 * Check for trailing characters.
143 */
144 if (*cp && !isSPACE(*cp))
145 return 0;
146 /*
147 * Concoct the address according to
148 * the number of parts specified.
149 */
150 nparts = pp - parts + 1; /* force to an int for switch() */
151 switch (nparts) {
152
153 case 1: /* a -- 32 bits */
154 break;
155
156 case 2: /* a.b -- 8.24 bits */
157 if (val > 0xffffff)
158 return 0;
159 val |= parts[0] << 24;
160 break;
161
162 case 3: /* a.b.c -- 8.8.16 bits */
163 if (val > 0xffff)
164 return 0;
165 val |= (parts[0] << 24) | (parts[1] << 16);
166 break;
167
168 case 4: /* a.b.c.d -- 8.8.8.8 bits */
169 if (val > 0xff)
170 return 0;
171 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
172 break;
173 }
174 addr->s_addr = htonl(val);
175 return 1;
176}
177
178#undef inet_aton
179#define inet_aton my_inet_aton
180
181#endif /* ! HAS_INET_ATON */
182
183
184static int
185not_here(char *s)
186{
187 croak("Socket::%s not implemented on this architecture", s);
188 return -1;
189}
190
191#define PERL_IN_ADDR_S_ADDR_SIZE 4
192
193/*
194* Bad assumptions possible here.
195*
196* Bad Assumption 1: struct in_addr has no other fields
197* than the s_addr (which is the field we care about
198* in here, really). However, we can be fed either 4-byte
199* addresses (from pack("N", ...), or va.b.c.d, or ...),
200* or full struct in_addrs (from e.g. pack_sockaddr_in()),
201* which may or may not be 4 bytes in size.
202*
203* Bad Assumption 2: the s_addr field is a simple type
204* (such as an int, u_int32_t). It can be a bit field,
205* in which case using & (address-of) on it or taking sizeof()
206* wouldn't go over too well. (Those are not attempted
207* now but in case someone thinks to change the below code
208* to use addr.s_addr instead of addr, you have been warned.)
209*
210* Bad Assumption 3: the s_addr is the first field in
211* an in_addr, or that its bytes are the first bytes in
212* an in_addr.
213*
214* These bad assumptions are wrong in UNICOS which has
215* struct in_addr { struct { u_long st_addr:32; } s_da };
216* #define s_addr s_da.st_addr
217* and u_long is 64 bits.
218*
219* --jhi */
220
221#include "const-c.inc"
222
223MODULE = Socket PACKAGE = Socket
224
225INCLUDE: const-xs.inc
226
227void
228inet_aton(host)
229 char * host
230 CODE:
231 {
232 struct in_addr ip_address;
233 struct hostent * phe;
234 int ok =
235 (host != NULL) &&
236 (*host != '\0') &&
237 inet_aton(host, &ip_address);
238
239 if (!ok && (phe = gethostbyname(host))) {
240 Copy( phe->h_addr, &ip_address, phe->h_length, char );
241 ok = 1;
242 }
243
244 ST(0) = sv_newmortal();
245 if (ok)
246 sv_setpvn( ST(0), (char *)&ip_address, sizeof ip_address );
247 }
248
249void
250inet_ntoa(ip_address_sv)
251 SV * ip_address_sv
252 CODE:
253 {
254 STRLEN addrlen;
255 struct in_addr addr;
256 char * addr_str;
257 char * ip_address;
258 if (DO_UTF8(ip_address_sv) && !sv_utf8_downgrade(ip_address_sv, 1))
259 croak("Wide character in Socket::inet_ntoa");
260 ip_address = SvPVbyte(ip_address_sv, addrlen);
261 if (addrlen == sizeof(addr) || addrlen == 4)
262 addr.s_addr =
263 (ip_address[0] & 0xFF) << 24 |
264 (ip_address[1] & 0xFF) << 16 |
265 (ip_address[2] & 0xFF) << 8 |
266 (ip_address[3] & 0xFF);
267 else
268 croak("Bad arg length for %s, length is %d, should be %d",
269 "Socket::inet_ntoa",
270 addrlen, sizeof(addr));
271 /* We could use inet_ntoa() but that is broken
272 * in HP-UX + GCC + 64bitint (returns "0.0.0.0"),
273 * so let's use this sprintf() workaround everywhere.
274 * This is also more threadsafe than using inet_ntoa(). */
275 Newx(addr_str, 4 * 3 + 3 + 1, char); /* IPv6? */
276 sprintf(addr_str, "%d.%d.%d.%d",
277 ((addr.s_addr >> 24) & 0xFF),
278 ((addr.s_addr >> 16) & 0xFF),
279 ((addr.s_addr >> 8) & 0xFF),
280 ( addr.s_addr & 0xFF));
281 ST(0) = sv_2mortal(newSVpvn(addr_str, strlen(addr_str)));
282 Safefree(addr_str);
283 }
284
285void
286sockaddr_family(sockaddr)
287 SV * sockaddr
288 PREINIT:
289 STRLEN sockaddr_len;
290 char *sockaddr_pv = SvPVbyte(sockaddr, sockaddr_len);
291 CODE:
292 if (sockaddr_len < offsetof(struct sockaddr, sa_data)) {
293 croak("Bad arg length for %s, length is %d, should be at least %d",
294 "Socket::sockaddr_family", sockaddr_len,
295 offsetof(struct sockaddr, sa_data));
296 }
297 ST(0) = sv_2mortal(newSViv(((struct sockaddr*)sockaddr_pv)->sa_family));
298
299void
300pack_sockaddr_un(pathname)
301 SV * pathname
302 CODE:
303 {
304#ifdef I_SYS_UN
305 struct sockaddr_un sun_ad; /* fear using sun */
306 STRLEN len;
307 char * pathname_pv;
308
309 Zero( &sun_ad, sizeof sun_ad, char );
310 sun_ad.sun_family = AF_UNIX;
311 pathname_pv = SvPV(pathname,len);
312 if (len > sizeof(sun_ad.sun_path))
313 len = sizeof(sun_ad.sun_path);
314# ifdef OS2 /* Name should start with \socket\ and contain backslashes! */
315 {
316 int off;
317 char *s, *e;
318
319 if (pathname_pv[0] != '/' && pathname_pv[0] != '\\')
320 croak("Relative UNIX domain socket name '%s' unsupported",
321 pathname_pv);
322 else if (len < 8
323 || pathname_pv[7] != '/' && pathname_pv[7] != '\\'
324 || !strnicmp(pathname_pv + 1, "socket", 6))
325 off = 7;
326 else
327 off = 0; /* Preserve names starting with \socket\ */
328 Copy( "\\socket", sun_ad.sun_path, off, char);
329 Copy( pathname_pv, sun_ad.sun_path + off, len, char );
330
331 s = sun_ad.sun_path + off - 1;
332 e = s + len + 1;
333 while (++s < e)
334 if (*s = '/')
335 *s = '\\';
336 }
337# else /* !( defined OS2 ) */
338 Copy( pathname_pv, sun_ad.sun_path, len, char );
339# endif
340 if (0) not_here("dummy");
341 ST(0) = sv_2mortal(newSVpvn((char *)&sun_ad, sizeof sun_ad));
342#else
343 ST(0) = (SV *) not_here("pack_sockaddr_un");
344#endif
345
346 }
347
348void
349unpack_sockaddr_un(sun_sv)
350 SV * sun_sv
351 CODE:
352 {
353#ifdef I_SYS_UN
354 struct sockaddr_un addr;
355 STRLEN sockaddrlen;
356 char * sun_ad = SvPVbyte(sun_sv,sockaddrlen);
357 char * e;
358# ifndef __linux__
359 /* On Linux sockaddrlen on sockets returned by accept, recvfrom,
360 getpeername and getsockname is not equal to sizeof(addr). */
361 if (sockaddrlen != sizeof(addr)) {
362 croak("Bad arg length for %s, length is %d, should be %d",
363 "Socket::unpack_sockaddr_un",
364 sockaddrlen, sizeof(addr));
365 }
366# endif
367
368 Copy( sun_ad, &addr, sizeof addr, char );
369
370 if ( addr.sun_family != AF_UNIX ) {
371 croak("Bad address family for %s, got %d, should be %d",
372 "Socket::unpack_sockaddr_un",
373 addr.sun_family,
374 AF_UNIX);
375 }
376 e = (char*)addr.sun_path;
377 /* On Linux, the name of abstract unix domain sockets begins
378 * with a '\0', so allow this. */
379 while ((*e || (e == addr.sun_path && e[1] && sockaddrlen > 1))
380 && e < (char*)addr.sun_path + sizeof addr.sun_path)
381 ++e;
382 ST(0) = sv_2mortal(newSVpvn(addr.sun_path, e - (char*)addr.sun_path));
383#else
384 ST(0) = (SV *) not_here("unpack_sockaddr_un");
385#endif
386 }
387
388void
389pack_sockaddr_in(port, ip_address_sv)
390 unsigned short port
391 SV * ip_address_sv
392 CODE:
393 {
394 struct sockaddr_in sin;
395 struct in_addr addr;
396 STRLEN addrlen;
397 char * ip_address;
398 if (DO_UTF8(ip_address_sv) && !sv_utf8_downgrade(ip_address_sv, 1))
399 croak("Wide character in Socket::pack_sockaddr_in");
400 ip_address = SvPVbyte(ip_address_sv, addrlen);
401 if (addrlen == sizeof(addr) || addrlen == 4)
402 addr.s_addr =
403 (ip_address[0] & 0xFF) << 24 |
404 (ip_address[1] & 0xFF) << 16 |
405 (ip_address[2] & 0xFF) << 8 |
406 (ip_address[3] & 0xFF);
407 else
408 croak("Bad arg length for %s, length is %d, should be %d",
409 "Socket::pack_sockaddr_in",
410 addrlen, sizeof(addr));
411 Zero( &sin, sizeof sin, char );
412 sin.sin_family = AF_INET;
413 sin.sin_port = htons(port);
414 sin.sin_addr.s_addr = htonl(addr.s_addr);
415 ST(0) = sv_2mortal(newSVpvn((char *)&sin, sizeof sin));
416 }
417
418void
419unpack_sockaddr_in(sin_sv)
420 SV * sin_sv
421 PPCODE:
422 {
423 STRLEN sockaddrlen;
424 struct sockaddr_in addr;
425 unsigned short port;
426 struct in_addr ip_address;
427 char * sin = SvPVbyte(sin_sv,sockaddrlen);
428 if (sockaddrlen != sizeof(addr)) {
429 croak("Bad arg length for %s, length is %d, should be %d",
430 "Socket::unpack_sockaddr_in",
431 sockaddrlen, sizeof(addr));
432 }
433 Copy( sin, &addr,sizeof addr, char );
434 if ( addr.sin_family != AF_INET ) {
435 croak("Bad address family for %s, got %d, should be %d",
436 "Socket::unpack_sockaddr_in",
437 addr.sin_family,
438 AF_INET);
439 }
440 port = ntohs(addr.sin_port);
441 ip_address = addr.sin_addr;
442
443 EXTEND(SP, 2);
444 PUSHs(sv_2mortal(newSViv((IV) port)));
445 PUSHs(sv_2mortal(newSVpvn((char *)&ip_address, sizeof ip_address)));
446 }
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