| 1 | /* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
| 2 | * |
| 3 | * This library is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of the GNU Lesser General Public |
| 5 | * License as published by the Free Software Foundation; either |
| 6 | * version 2.1 of the License, or (at your option) any later version. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * Lesser General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public |
| 14 | * License along with this library; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 16 | */ |
| 17 | |
| 18 | |
| 19 | \f |
| 20 | |
| 21 | #if HAVE_CONFIG_H |
| 22 | # include <config.h> |
| 23 | #endif |
| 24 | |
| 25 | #include <errno.h> |
| 26 | #include <gmp.h> |
| 27 | |
| 28 | #include "libguile/_scm.h" |
| 29 | #include "libguile/unif.h" |
| 30 | #include "libguile/feature.h" |
| 31 | #include "libguile/fports.h" |
| 32 | #include "libguile/strings.h" |
| 33 | #include "libguile/vectors.h" |
| 34 | #include "libguile/dynwind.h" |
| 35 | |
| 36 | #include "libguile/validate.h" |
| 37 | #include "libguile/socket.h" |
| 38 | |
| 39 | #ifdef __MINGW32__ |
| 40 | #include "win32-socket.h" |
| 41 | #endif |
| 42 | |
| 43 | #ifdef HAVE_STDINT_H |
| 44 | #include <stdint.h> |
| 45 | #endif |
| 46 | #ifdef HAVE_STRING_H |
| 47 | #include <string.h> |
| 48 | #endif |
| 49 | #ifdef HAVE_UNISTD_H |
| 50 | #include <unistd.h> |
| 51 | #endif |
| 52 | #include <sys/types.h> |
| 53 | #ifdef HAVE_WINSOCK2_H |
| 54 | #include <winsock2.h> |
| 55 | #else |
| 56 | #include <sys/socket.h> |
| 57 | #ifdef HAVE_UNIX_DOMAIN_SOCKETS |
| 58 | #include <sys/un.h> |
| 59 | #endif |
| 60 | #include <netinet/in.h> |
| 61 | #include <netdb.h> |
| 62 | #include <arpa/inet.h> |
| 63 | #endif |
| 64 | |
| 65 | #if defined (HAVE_UNIX_DOMAIN_SOCKETS) && !defined (SUN_LEN) |
| 66 | #define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \ |
| 67 | + strlen ((ptr)->sun_path)) |
| 68 | #endif |
| 69 | |
| 70 | /* we are not currently using socklen_t. it's not defined on all systems, |
| 71 | so would need to be checked by configure. in the meantime, plain |
| 72 | int is the best alternative. */ |
| 73 | |
| 74 | \f |
| 75 | |
| 76 | SCM_DEFINE (scm_htons, "htons", 1, 0, 0, |
| 77 | (SCM value), |
| 78 | "Convert a 16 bit quantity from host to network byte ordering.\n" |
| 79 | "@var{value} is packed into 2 bytes, which are then converted\n" |
| 80 | "and returned as a new integer.") |
| 81 | #define FUNC_NAME s_scm_htons |
| 82 | { |
| 83 | return scm_from_ushort (htons (scm_to_ushort (value))); |
| 84 | } |
| 85 | #undef FUNC_NAME |
| 86 | |
| 87 | SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0, |
| 88 | (SCM value), |
| 89 | "Convert a 16 bit quantity from network to host byte ordering.\n" |
| 90 | "@var{value} is packed into 2 bytes, which are then converted\n" |
| 91 | "and returned as a new integer.") |
| 92 | #define FUNC_NAME s_scm_ntohs |
| 93 | { |
| 94 | return scm_from_ushort (ntohs (scm_to_ushort (value))); |
| 95 | } |
| 96 | #undef FUNC_NAME |
| 97 | |
| 98 | SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0, |
| 99 | (SCM value), |
| 100 | "Convert a 32 bit quantity from host to network byte ordering.\n" |
| 101 | "@var{value} is packed into 4 bytes, which are then converted\n" |
| 102 | "and returned as a new integer.") |
| 103 | #define FUNC_NAME s_scm_htonl |
| 104 | { |
| 105 | scm_t_uint32 c_in = SCM_NUM2ULONG (1, value); |
| 106 | |
| 107 | return scm_from_ulong (htonl (c_in)); |
| 108 | } |
| 109 | #undef FUNC_NAME |
| 110 | |
| 111 | SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0, |
| 112 | (SCM value), |
| 113 | "Convert a 32 bit quantity from network to host byte ordering.\n" |
| 114 | "@var{value} is packed into 4 bytes, which are then converted\n" |
| 115 | "and returned as a new integer.") |
| 116 | #define FUNC_NAME s_scm_ntohl |
| 117 | { |
| 118 | scm_t_uint32 c_in = SCM_NUM2ULONG (1, value); |
| 119 | |
| 120 | return scm_from_ulong (ntohl (c_in)); |
| 121 | } |
| 122 | #undef FUNC_NAME |
| 123 | |
| 124 | #ifndef HAVE_INET_ATON |
| 125 | /* for our definition in inet_aton.c, not usually needed. */ |
| 126 | extern int inet_aton (); |
| 127 | #endif |
| 128 | |
| 129 | SCM_DEFINE (scm_inet_aton, "inet-aton", 1, 0, 0, |
| 130 | (SCM address), |
| 131 | "Convert an IPv4 Internet address from printable string\n" |
| 132 | "(dotted decimal notation) to an integer. E.g.,\n\n" |
| 133 | "@lisp\n" |
| 134 | "(inet-aton \"127.0.0.1\") @result{} 2130706433\n" |
| 135 | "@end lisp") |
| 136 | #define FUNC_NAME s_scm_inet_aton |
| 137 | { |
| 138 | struct in_addr soka; |
| 139 | char *c_address; |
| 140 | int rv; |
| 141 | |
| 142 | c_address = scm_to_locale_string (address); |
| 143 | rv = inet_aton (c_address, &soka); |
| 144 | free (c_address); |
| 145 | if (rv == 0) |
| 146 | SCM_MISC_ERROR ("bad address", SCM_EOL); |
| 147 | return scm_from_ulong (ntohl (soka.s_addr)); |
| 148 | } |
| 149 | #undef FUNC_NAME |
| 150 | |
| 151 | |
| 152 | SCM_DEFINE (scm_inet_ntoa, "inet-ntoa", 1, 0, 0, |
| 153 | (SCM inetid), |
| 154 | "Convert an IPv4 Internet address to a printable\n" |
| 155 | "(dotted decimal notation) string. E.g.,\n\n" |
| 156 | "@lisp\n" |
| 157 | "(inet-ntoa 2130706433) @result{} \"127.0.0.1\"\n" |
| 158 | "@end lisp") |
| 159 | #define FUNC_NAME s_scm_inet_ntoa |
| 160 | { |
| 161 | struct in_addr addr; |
| 162 | char *s; |
| 163 | SCM answer; |
| 164 | addr.s_addr = htonl (SCM_NUM2ULONG (1, inetid)); |
| 165 | s = inet_ntoa (addr); |
| 166 | answer = scm_from_locale_string (s); |
| 167 | return answer; |
| 168 | } |
| 169 | #undef FUNC_NAME |
| 170 | |
| 171 | #ifdef HAVE_INET_NETOF |
| 172 | SCM_DEFINE (scm_inet_netof, "inet-netof", 1, 0, 0, |
| 173 | (SCM address), |
| 174 | "Return the network number part of the given IPv4\n" |
| 175 | "Internet address. E.g.,\n\n" |
| 176 | "@lisp\n" |
| 177 | "(inet-netof 2130706433) @result{} 127\n" |
| 178 | "@end lisp") |
| 179 | #define FUNC_NAME s_scm_inet_netof |
| 180 | { |
| 181 | struct in_addr addr; |
| 182 | addr.s_addr = htonl (SCM_NUM2ULONG (1, address)); |
| 183 | return scm_from_ulong (inet_netof (addr)); |
| 184 | } |
| 185 | #undef FUNC_NAME |
| 186 | #endif |
| 187 | |
| 188 | #ifdef HAVE_INET_LNAOF |
| 189 | SCM_DEFINE (scm_lnaof, "inet-lnaof", 1, 0, 0, |
| 190 | (SCM address), |
| 191 | "Return the local-address-with-network part of the given\n" |
| 192 | "IPv4 Internet address, using the obsolete class A/B/C system.\n" |
| 193 | "E.g.,\n\n" |
| 194 | "@lisp\n" |
| 195 | "(inet-lnaof 2130706433) @result{} 1\n" |
| 196 | "@end lisp") |
| 197 | #define FUNC_NAME s_scm_lnaof |
| 198 | { |
| 199 | struct in_addr addr; |
| 200 | addr.s_addr = htonl (SCM_NUM2ULONG (1, address)); |
| 201 | return scm_from_ulong (inet_lnaof (addr)); |
| 202 | } |
| 203 | #undef FUNC_NAME |
| 204 | #endif |
| 205 | |
| 206 | #ifdef HAVE_INET_MAKEADDR |
| 207 | SCM_DEFINE (scm_inet_makeaddr, "inet-makeaddr", 2, 0, 0, |
| 208 | (SCM net, SCM lna), |
| 209 | "Make an IPv4 Internet address by combining the network number\n" |
| 210 | "@var{net} with the local-address-within-network number\n" |
| 211 | "@var{lna}. E.g.,\n\n" |
| 212 | "@lisp\n" |
| 213 | "(inet-makeaddr 127 1) @result{} 2130706433\n" |
| 214 | "@end lisp") |
| 215 | #define FUNC_NAME s_scm_inet_makeaddr |
| 216 | { |
| 217 | struct in_addr addr; |
| 218 | unsigned long netnum; |
| 219 | unsigned long lnanum; |
| 220 | |
| 221 | netnum = SCM_NUM2ULONG (1, net); |
| 222 | lnanum = SCM_NUM2ULONG (2, lna); |
| 223 | addr = inet_makeaddr (netnum, lnanum); |
| 224 | return scm_from_ulong (ntohl (addr.s_addr)); |
| 225 | } |
| 226 | #undef FUNC_NAME |
| 227 | #endif |
| 228 | |
| 229 | #ifdef HAVE_IPV6 |
| 230 | |
| 231 | /* flip a 128 bit IPv6 address between host and network order. */ |
| 232 | #ifdef WORDS_BIGENDIAN |
| 233 | #define FLIP_NET_HOST_128(addr) |
| 234 | #else |
| 235 | #define FLIP_NET_HOST_128(addr)\ |
| 236 | {\ |
| 237 | int i;\ |
| 238 | \ |
| 239 | for (i = 0; i < 8; i++)\ |
| 240 | {\ |
| 241 | scm_t_uint8 c = (addr)[i];\ |
| 242 | \ |
| 243 | (addr)[i] = (addr)[15 - i];\ |
| 244 | (addr)[15 - i] = c;\ |
| 245 | }\ |
| 246 | } |
| 247 | #endif |
| 248 | |
| 249 | #ifdef WORDS_BIGENDIAN |
| 250 | #define FLIPCPY_NET_HOST_128(dest, src) memcpy (dest, src, 16) |
| 251 | #else |
| 252 | #define FLIPCPY_NET_HOST_128(dest, src) \ |
| 253 | { \ |
| 254 | const scm_t_uint8 *tmp_srcp = (src) + 15; \ |
| 255 | scm_t_uint8 *tmp_destp = (dest); \ |
| 256 | \ |
| 257 | do { \ |
| 258 | *tmp_destp++ = *tmp_srcp--; \ |
| 259 | } while (tmp_srcp != (src)); \ |
| 260 | } |
| 261 | #endif |
| 262 | |
| 263 | |
| 264 | #if (SIZEOF_SCM_T_BITS * SCM_CHAR_BIT) > 128 |
| 265 | #error "Assumption that scm_t_bits <= 128 bits has been violated." |
| 266 | #endif |
| 267 | |
| 268 | #if (SIZEOF_UNSIGNED_LONG * SCM_CHAR_BIT) > 128 |
| 269 | #error "Assumption that unsigned long <= 128 bits has been violated." |
| 270 | #endif |
| 271 | |
| 272 | #if (SIZEOF_UNSIGNED_LONG_LONG * SCM_CHAR_BIT) > 128 |
| 273 | #error "Assumption that unsigned long long <= 128 bits has been violated." |
| 274 | #endif |
| 275 | |
| 276 | /* convert a 128 bit IPv6 address in network order to a host ordered |
| 277 | SCM integer. */ |
| 278 | static SCM |
| 279 | scm_from_ipv6 (const scm_t_uint8 *src) |
| 280 | { |
| 281 | SCM result = scm_i_mkbig (); |
| 282 | mpz_import (SCM_I_BIG_MPZ (result), |
| 283 | 1, /* chunk */ |
| 284 | 1, /* big-endian chunk ordering */ |
| 285 | 16, /* chunks are 16 bytes long */ |
| 286 | 1, /* big-endian byte ordering */ |
| 287 | 0, /* "nails" -- leading unused bits per chunk */ |
| 288 | src); |
| 289 | return scm_i_normbig (result); |
| 290 | } |
| 291 | |
| 292 | /* convert a host ordered SCM integer to a 128 bit IPv6 address in |
| 293 | network order. */ |
| 294 | static void |
| 295 | scm_to_ipv6 (scm_t_uint8 dst[16], SCM src) |
| 296 | { |
| 297 | if (SCM_I_INUMP (src)) |
| 298 | { |
| 299 | scm_t_signed_bits n = SCM_I_INUM (src); |
| 300 | if (n < 0) |
| 301 | scm_out_of_range (NULL, src); |
| 302 | #ifdef WORDS_BIGENDIAN |
| 303 | memset (dst, 0, 16 - sizeof (scm_t_signed_bits)); |
| 304 | memcpy (dst + (16 - sizeof (scm_t_signed_bits)), |
| 305 | &n, |
| 306 | sizeof (scm_t_signed_bits)); |
| 307 | #else |
| 308 | memset (dst + sizeof (scm_t_signed_bits), |
| 309 | 0, |
| 310 | 16 - sizeof (scm_t_signed_bits)); |
| 311 | /* FIXME: this pair of ops is kinda wasteful -- should rewrite as |
| 312 | a single loop perhaps, similar to the handling of bignums. */ |
| 313 | memcpy (dst, &n, sizeof (scm_t_signed_bits)); |
| 314 | FLIP_NET_HOST_128 (dst); |
| 315 | #endif |
| 316 | } |
| 317 | else if (SCM_BIGP (src)) |
| 318 | { |
| 319 | size_t count; |
| 320 | |
| 321 | if ((mpz_sgn (SCM_I_BIG_MPZ (src)) < 0) |
| 322 | || mpz_sizeinbase (SCM_I_BIG_MPZ (src), 2) > 128) |
| 323 | scm_out_of_range (NULL, src); |
| 324 | |
| 325 | memset (dst, 0, 16); |
| 326 | mpz_export (dst, |
| 327 | &count, |
| 328 | 1, /* big-endian chunk ordering */ |
| 329 | 16, /* chunks are 16 bytes long */ |
| 330 | 1, /* big-endian byte ordering */ |
| 331 | 0, /* "nails" -- leading unused bits per chunk */ |
| 332 | SCM_I_BIG_MPZ (src)); |
| 333 | scm_remember_upto_here_1 (src); |
| 334 | } |
| 335 | else |
| 336 | scm_wrong_type_arg (NULL, 0, src); |
| 337 | } |
| 338 | |
| 339 | #ifdef HAVE_INET_PTON |
| 340 | SCM_DEFINE (scm_inet_pton, "inet-pton", 2, 0, 0, |
| 341 | (SCM family, SCM address), |
| 342 | "Convert a string containing a printable network address to\n" |
| 343 | "an integer address. Note that unlike the C version of this\n" |
| 344 | "function,\n" |
| 345 | "the result is an integer with normal host byte ordering.\n" |
| 346 | "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n" |
| 347 | "@lisp\n" |
| 348 | "(inet-pton AF_INET \"127.0.0.1\") @result{} 2130706433\n" |
| 349 | "(inet-pton AF_INET6 \"::1\") @result{} 1\n" |
| 350 | "@end lisp") |
| 351 | #define FUNC_NAME s_scm_inet_pton |
| 352 | { |
| 353 | int af; |
| 354 | char *src; |
| 355 | char dst[16]; |
| 356 | int rv, eno; |
| 357 | |
| 358 | af = scm_to_int (family); |
| 359 | SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6); |
| 360 | src = scm_to_locale_string (address); |
| 361 | rv = inet_pton (af, src, dst); |
| 362 | eno = errno; |
| 363 | free (src); |
| 364 | errno = eno; |
| 365 | if (rv == -1) |
| 366 | SCM_SYSERROR; |
| 367 | else if (rv == 0) |
| 368 | SCM_MISC_ERROR ("Bad address", SCM_EOL); |
| 369 | if (af == AF_INET) |
| 370 | return scm_from_ulong (ntohl (*(scm_t_uint32 *) dst)); |
| 371 | else |
| 372 | return scm_from_ipv6 ((char *) dst); |
| 373 | } |
| 374 | #undef FUNC_NAME |
| 375 | #endif |
| 376 | |
| 377 | #ifdef HAVE_INET_NTOP |
| 378 | SCM_DEFINE (scm_inet_ntop, "inet-ntop", 2, 0, 0, |
| 379 | (SCM family, SCM address), |
| 380 | "Convert a network address into a printable string.\n" |
| 381 | "Note that unlike the C version of this function,\n" |
| 382 | "the input is an integer with normal host byte ordering.\n" |
| 383 | "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n" |
| 384 | "@lisp\n" |
| 385 | "(inet-ntop AF_INET 2130706433) @result{} \"127.0.0.1\"\n" |
| 386 | "(inet-ntop AF_INET6 (- (expt 2 128) 1)) @result{}\n" |
| 387 | "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff\n" |
| 388 | "@end lisp") |
| 389 | #define FUNC_NAME s_scm_inet_ntop |
| 390 | { |
| 391 | int af; |
| 392 | #ifdef INET6_ADDRSTRLEN |
| 393 | char dst[INET6_ADDRSTRLEN]; |
| 394 | #else |
| 395 | char dst[46]; |
| 396 | #endif |
| 397 | char addr6[16]; |
| 398 | |
| 399 | af = scm_to_int (family); |
| 400 | SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6); |
| 401 | if (af == AF_INET) |
| 402 | *(scm_t_uint32 *) addr6 = htonl (SCM_NUM2ULONG (2, address)); |
| 403 | else |
| 404 | scm_to_ipv6 (addr6, address); |
| 405 | if (inet_ntop (af, &addr6, dst, sizeof dst) == NULL) |
| 406 | SCM_SYSERROR; |
| 407 | return scm_from_locale_string (dst); |
| 408 | } |
| 409 | #undef FUNC_NAME |
| 410 | #endif |
| 411 | |
| 412 | #endif /* HAVE_IPV6 */ |
| 413 | |
| 414 | SCM_SYMBOL (sym_socket, "socket"); |
| 415 | |
| 416 | #define SCM_SOCK_FD_TO_PORT(fd) scm_fdes_to_port (fd, "r+0", sym_socket) |
| 417 | |
| 418 | SCM_DEFINE (scm_socket, "socket", 3, 0, 0, |
| 419 | (SCM family, SCM style, SCM proto), |
| 420 | "Return a new socket port of the type specified by @var{family},\n" |
| 421 | "@var{style} and @var{proto}. All three parameters are\n" |
| 422 | "integers. Supported values for @var{family} are\n" |
| 423 | "@code{AF_UNIX}, @code{AF_INET} and @code{AF_INET6}.\n" |
| 424 | "Typical values for @var{style} are @code{SOCK_STREAM},\n" |
| 425 | "@code{SOCK_DGRAM} and @code{SOCK_RAW}.\n\n" |
| 426 | "@var{proto} can be obtained from a protocol name using\n" |
| 427 | "@code{getprotobyname}. A value of zero specifies the default\n" |
| 428 | "protocol, which is usually right.\n\n" |
| 429 | "A single socket port cannot by used for communication until it\n" |
| 430 | "has been connected to another socket.") |
| 431 | #define FUNC_NAME s_scm_socket |
| 432 | { |
| 433 | int fd; |
| 434 | |
| 435 | fd = socket (scm_to_int (family), |
| 436 | scm_to_int (style), |
| 437 | scm_to_int (proto)); |
| 438 | if (fd == -1) |
| 439 | SCM_SYSERROR; |
| 440 | return SCM_SOCK_FD_TO_PORT (fd); |
| 441 | } |
| 442 | #undef FUNC_NAME |
| 443 | |
| 444 | #ifdef HAVE_SOCKETPAIR |
| 445 | SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0, |
| 446 | (SCM family, SCM style, SCM proto), |
| 447 | "Return a pair of connected (but unnamed) socket ports of the\n" |
| 448 | "type specified by @var{family}, @var{style} and @var{proto}.\n" |
| 449 | "Many systems support only socket pairs of the @code{AF_UNIX}\n" |
| 450 | "family. Zero is likely to be the only meaningful value for\n" |
| 451 | "@var{proto}.") |
| 452 | #define FUNC_NAME s_scm_socketpair |
| 453 | { |
| 454 | int fam; |
| 455 | int fd[2]; |
| 456 | |
| 457 | fam = scm_to_int (family); |
| 458 | |
| 459 | if (socketpair (fam, scm_to_int (style), scm_to_int (proto), fd) == -1) |
| 460 | SCM_SYSERROR; |
| 461 | |
| 462 | return scm_cons (SCM_SOCK_FD_TO_PORT (fd[0]), SCM_SOCK_FD_TO_PORT (fd[1])); |
| 463 | } |
| 464 | #undef FUNC_NAME |
| 465 | #endif |
| 466 | |
| 467 | SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0, |
| 468 | (SCM sock, SCM level, SCM optname), |
| 469 | "Return the value of a particular socket option for the socket\n" |
| 470 | "port @var{sock}. @var{level} is an integer code for type of\n" |
| 471 | "option being requested, e.g., @code{SOL_SOCKET} for\n" |
| 472 | "socket-level options. @var{optname} is an integer code for the\n" |
| 473 | "option required and should be specified using one of the\n" |
| 474 | "symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n\n" |
| 475 | "The returned value is typically an integer but @code{SO_LINGER}\n" |
| 476 | "returns a pair of integers.") |
| 477 | #define FUNC_NAME s_scm_getsockopt |
| 478 | { |
| 479 | int fd; |
| 480 | /* size of optval is the largest supported option. */ |
| 481 | #ifdef HAVE_STRUCT_LINGER |
| 482 | char optval[sizeof (struct linger)]; |
| 483 | int optlen = sizeof (struct linger); |
| 484 | #else |
| 485 | char optval[sizeof (size_t)]; |
| 486 | int optlen = sizeof (size_t); |
| 487 | #endif |
| 488 | int ilevel; |
| 489 | int ioptname; |
| 490 | |
| 491 | sock = SCM_COERCE_OUTPORT (sock); |
| 492 | SCM_VALIDATE_OPFPORT (1, sock); |
| 493 | ilevel = scm_to_int (level); |
| 494 | ioptname = scm_to_int (optname); |
| 495 | |
| 496 | fd = SCM_FPORT_FDES (sock); |
| 497 | if (getsockopt (fd, ilevel, ioptname, (void *) optval, &optlen) == -1) |
| 498 | SCM_SYSERROR; |
| 499 | |
| 500 | if (ilevel == SOL_SOCKET) |
| 501 | { |
| 502 | #ifdef SO_LINGER |
| 503 | if (ioptname == SO_LINGER) |
| 504 | { |
| 505 | #ifdef HAVE_STRUCT_LINGER |
| 506 | struct linger *ling = (struct linger *) optval; |
| 507 | |
| 508 | return scm_cons (scm_from_long (ling->l_onoff), |
| 509 | scm_from_long (ling->l_linger)); |
| 510 | #else |
| 511 | return scm_cons (scm_from_long (*(int *) optval), |
| 512 | scm_from_int (0)); |
| 513 | #endif |
| 514 | } |
| 515 | else |
| 516 | #endif |
| 517 | if (0 |
| 518 | #ifdef SO_SNDBUF |
| 519 | || ioptname == SO_SNDBUF |
| 520 | #endif |
| 521 | #ifdef SO_RCVBUF |
| 522 | || ioptname == SO_RCVBUF |
| 523 | #endif |
| 524 | ) |
| 525 | { |
| 526 | return scm_from_size_t (*(size_t *) optval); |
| 527 | } |
| 528 | } |
| 529 | return scm_from_int (*(int *) optval); |
| 530 | } |
| 531 | #undef FUNC_NAME |
| 532 | |
| 533 | SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0, |
| 534 | (SCM sock, SCM level, SCM optname, SCM value), |
| 535 | "Set the value of a particular socket option for the socket\n" |
| 536 | "port @var{sock}. @var{level} is an integer code for type of option\n" |
| 537 | "being set, e.g., @code{SOL_SOCKET} for socket-level options.\n" |
| 538 | "@var{optname} is an\n" |
| 539 | "integer code for the option to set and should be specified using one of\n" |
| 540 | "the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n" |
| 541 | "@var{value} is the value to which the option should be set. For\n" |
| 542 | "most options this must be an integer, but for @code{SO_LINGER} it must\n" |
| 543 | "be a pair.\n\n" |
| 544 | "The return value is unspecified.") |
| 545 | #define FUNC_NAME s_scm_setsockopt |
| 546 | { |
| 547 | int fd; |
| 548 | int optlen = -1; |
| 549 | /* size of optval is the largest supported option. */ |
| 550 | #ifdef HAVE_STRUCT_LINGER |
| 551 | char optval[sizeof (struct linger)]; |
| 552 | #else |
| 553 | char optval[sizeof (size_t)]; |
| 554 | #endif |
| 555 | int ilevel, ioptname; |
| 556 | |
| 557 | sock = SCM_COERCE_OUTPORT (sock); |
| 558 | |
| 559 | SCM_VALIDATE_OPFPORT (1, sock); |
| 560 | ilevel = scm_to_int (level); |
| 561 | ioptname = scm_to_int (optname); |
| 562 | |
| 563 | fd = SCM_FPORT_FDES (sock); |
| 564 | |
| 565 | if (ilevel == SOL_SOCKET) |
| 566 | { |
| 567 | #ifdef SO_LINGER |
| 568 | if (ioptname == SO_LINGER) |
| 569 | { |
| 570 | #ifdef HAVE_STRUCT_LINGER |
| 571 | struct linger ling; |
| 572 | long lv; |
| 573 | |
| 574 | SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME); |
| 575 | lv = SCM_NUM2LONG (4, SCM_CAR (value)); |
| 576 | ling.l_onoff = (int) lv; |
| 577 | SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_onoff == lv); |
| 578 | lv = SCM_NUM2LONG (4, SCM_CDR (value)); |
| 579 | ling.l_linger = (int) lv; |
| 580 | SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_linger == lv); |
| 581 | optlen = (int) sizeof (struct linger); |
| 582 | memcpy (optval, (void *) &ling, optlen); |
| 583 | #else |
| 584 | int ling; |
| 585 | long lv; |
| 586 | |
| 587 | SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME); |
| 588 | /* timeout is ignored, but may as well validate it. */ |
| 589 | lv = SCM_NUM2LONG (4, SCM_CDR (value)); |
| 590 | ling = (int) lv; |
| 591 | SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv); |
| 592 | lv = SCM_NUM2LONG (4, SCM_CAR (value)); |
| 593 | ling = (int) lv; |
| 594 | SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv); |
| 595 | optlen = (int) sizeof (int); |
| 596 | (*(int *) optval) = ling; |
| 597 | #endif |
| 598 | } |
| 599 | else |
| 600 | #endif |
| 601 | if (0 |
| 602 | #ifdef SO_SNDBUF |
| 603 | || ioptname == SO_SNDBUF |
| 604 | #endif |
| 605 | #ifdef SO_RCVBUF |
| 606 | || ioptname == SO_RCVBUF |
| 607 | #endif |
| 608 | ) |
| 609 | { |
| 610 | long lv = SCM_NUM2LONG (4, value); |
| 611 | |
| 612 | optlen = (int) sizeof (size_t); |
| 613 | (*(size_t *) optval) = (size_t) lv; |
| 614 | } |
| 615 | } |
| 616 | if (optlen == -1) |
| 617 | { |
| 618 | /* Most options take an int. */ |
| 619 | long lv = SCM_NUM2LONG (4, value); |
| 620 | int val = (int) lv; |
| 621 | |
| 622 | SCM_ASSERT_RANGE (SCM_ARG4, value, val == lv); |
| 623 | optlen = (int) sizeof (int); |
| 624 | (*(int *) optval) = val; |
| 625 | } |
| 626 | if (setsockopt (fd, ilevel, ioptname, (void *) optval, optlen) == -1) |
| 627 | SCM_SYSERROR; |
| 628 | return SCM_UNSPECIFIED; |
| 629 | } |
| 630 | #undef FUNC_NAME |
| 631 | |
| 632 | SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0, |
| 633 | (SCM sock, SCM how), |
| 634 | "Sockets can be closed simply by using @code{close-port}. The\n" |
| 635 | "@code{shutdown} procedure allows reception or transmission on a\n" |
| 636 | "connection to be shut down individually, according to the parameter\n" |
| 637 | "@var{how}:\n\n" |
| 638 | "@table @asis\n" |
| 639 | "@item 0\n" |
| 640 | "Stop receiving data for this socket. If further data arrives, reject it.\n" |
| 641 | "@item 1\n" |
| 642 | "Stop trying to transmit data from this socket. Discard any\n" |
| 643 | "data waiting to be sent. Stop looking for acknowledgement of\n" |
| 644 | "data already sent; don't retransmit it if it is lost.\n" |
| 645 | "@item 2\n" |
| 646 | "Stop both reception and transmission.\n" |
| 647 | "@end table\n\n" |
| 648 | "The return value is unspecified.") |
| 649 | #define FUNC_NAME s_scm_shutdown |
| 650 | { |
| 651 | int fd; |
| 652 | sock = SCM_COERCE_OUTPORT (sock); |
| 653 | SCM_VALIDATE_OPFPORT (1, sock); |
| 654 | fd = SCM_FPORT_FDES (sock); |
| 655 | if (shutdown (fd, scm_to_signed_integer (how, 0, 2)) == -1) |
| 656 | SCM_SYSERROR; |
| 657 | return SCM_UNSPECIFIED; |
| 658 | } |
| 659 | #undef FUNC_NAME |
| 660 | |
| 661 | /* convert fam/address/args into a sockaddr of the appropriate type. |
| 662 | args is modified by removing the arguments actually used. |
| 663 | which_arg and proc are used when reporting errors: |
| 664 | which_arg is the position of address in the original argument list. |
| 665 | proc is the name of the original procedure. |
| 666 | size returns the size of the structure allocated. */ |
| 667 | |
| 668 | static struct sockaddr * |
| 669 | scm_fill_sockaddr (int fam, SCM address, SCM *args, int which_arg, |
| 670 | const char *proc, int *size) |
| 671 | #define FUNC_NAME proc |
| 672 | { |
| 673 | switch (fam) |
| 674 | { |
| 675 | case AF_INET: |
| 676 | { |
| 677 | struct sockaddr_in *soka; |
| 678 | unsigned long addr; |
| 679 | int port; |
| 680 | |
| 681 | SCM_VALIDATE_ULONG_COPY (which_arg, address, addr); |
| 682 | SCM_VALIDATE_CONS (which_arg + 1, *args); |
| 683 | port = scm_to_int (SCM_CAR (*args)); |
| 684 | *args = SCM_CDR (*args); |
| 685 | soka = (struct sockaddr_in *) scm_malloc (sizeof (struct sockaddr_in)); |
| 686 | if (!soka) |
| 687 | scm_memory_error (proc); |
| 688 | #if HAVE_STRUCT_SOCKADDR_SIN_LEN |
| 689 | soka->sin_len = sizeof (struct sockaddr_in); |
| 690 | #endif |
| 691 | soka->sin_family = AF_INET; |
| 692 | soka->sin_addr.s_addr = htonl (addr); |
| 693 | soka->sin_port = htons (port); |
| 694 | *size = sizeof (struct sockaddr_in); |
| 695 | return (struct sockaddr *) soka; |
| 696 | } |
| 697 | #ifdef HAVE_IPV6 |
| 698 | case AF_INET6: |
| 699 | { |
| 700 | /* see RFC2553. */ |
| 701 | int port; |
| 702 | struct sockaddr_in6 *soka; |
| 703 | unsigned long flowinfo = 0; |
| 704 | unsigned long scope_id = 0; |
| 705 | |
| 706 | SCM_VALIDATE_CONS (which_arg + 1, *args); |
| 707 | port = scm_to_int (SCM_CAR (*args)); |
| 708 | *args = SCM_CDR (*args); |
| 709 | if (scm_is_pair (*args)) |
| 710 | { |
| 711 | SCM_VALIDATE_ULONG_COPY (which_arg + 2, SCM_CAR (*args), flowinfo); |
| 712 | *args = SCM_CDR (*args); |
| 713 | if (scm_is_pair (*args)) |
| 714 | { |
| 715 | SCM_VALIDATE_ULONG_COPY (which_arg + 3, SCM_CAR (*args), |
| 716 | scope_id); |
| 717 | *args = SCM_CDR (*args); |
| 718 | } |
| 719 | } |
| 720 | soka = (struct sockaddr_in6 *) scm_malloc (sizeof (struct sockaddr_in6)); |
| 721 | if (!soka) |
| 722 | scm_memory_error (proc); |
| 723 | #if HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN |
| 724 | soka->sin6_len = sizeof (struct sockaddr_in6); |
| 725 | #endif |
| 726 | soka->sin6_family = AF_INET6; |
| 727 | scm_to_ipv6 (soka->sin6_addr.s6_addr, address); |
| 728 | soka->sin6_port = htons (port); |
| 729 | soka->sin6_flowinfo = flowinfo; |
| 730 | #ifdef HAVE_SIN6_SCOPE_ID |
| 731 | soka->sin6_scope_id = scope_id; |
| 732 | #endif |
| 733 | *size = sizeof (struct sockaddr_in6); |
| 734 | return (struct sockaddr *) soka; |
| 735 | } |
| 736 | #endif |
| 737 | #ifdef HAVE_UNIX_DOMAIN_SOCKETS |
| 738 | case AF_UNIX: |
| 739 | { |
| 740 | struct sockaddr_un *soka; |
| 741 | int addr_size; |
| 742 | char *c_address; |
| 743 | |
| 744 | scm_frame_begin (0); |
| 745 | |
| 746 | c_address = scm_to_locale_string (address); |
| 747 | scm_frame_free (c_address); |
| 748 | |
| 749 | /* the static buffer size in sockaddr_un seems to be arbitrary |
| 750 | and not necessarily a hard limit. e.g., the glibc manual |
| 751 | suggests it may be possible to declare it size 0. let's |
| 752 | ignore it. if the O/S doesn't like the size it will cause |
| 753 | connect/bind etc., to fail. sun_path is always the last |
| 754 | member of the structure. */ |
| 755 | addr_size = sizeof (struct sockaddr_un) |
| 756 | + max (0, strlen (c_address) + 1 - (sizeof soka->sun_path)); |
| 757 | soka = (struct sockaddr_un *) scm_malloc (addr_size); |
| 758 | memset (soka, 0, addr_size); /* for sun_len: see sin_len above. */ |
| 759 | soka->sun_family = AF_UNIX; |
| 760 | strcpy (soka->sun_path, c_address); |
| 761 | *size = SUN_LEN (soka); |
| 762 | |
| 763 | scm_frame_end (); |
| 764 | return (struct sockaddr *) soka; |
| 765 | } |
| 766 | #endif |
| 767 | default: |
| 768 | scm_out_of_range (proc, scm_from_int (fam)); |
| 769 | } |
| 770 | } |
| 771 | #undef FUNC_NAME |
| 772 | |
| 773 | SCM_DEFINE (scm_connect, "connect", 3, 0, 1, |
| 774 | (SCM sock, SCM fam, SCM address, SCM args), |
| 775 | "Initiate a connection from a socket using a specified address\n" |
| 776 | "family to the address\n" |
| 777 | "specified by @var{address} and possibly @var{args}.\n" |
| 778 | "The format required for @var{address}\n" |
| 779 | "and @var{args} depends on the family of the socket.\n\n" |
| 780 | "For a socket of family @code{AF_UNIX},\n" |
| 781 | "only @var{address} is specified and must be a string with the\n" |
| 782 | "filename where the socket is to be created.\n\n" |
| 783 | "For a socket of family @code{AF_INET},\n" |
| 784 | "@var{address} must be an integer IPv4 host address and\n" |
| 785 | "@var{args} must be a single integer port number.\n\n" |
| 786 | "For a socket of family @code{AF_INET6},\n" |
| 787 | "@var{address} must be an integer IPv6 host address and\n" |
| 788 | "@var{args} may be up to three integers:\n" |
| 789 | "port [flowinfo] [scope_id],\n" |
| 790 | "where flowinfo and scope_id default to zero.\n\n" |
| 791 | "The return value is unspecified.") |
| 792 | #define FUNC_NAME s_scm_connect |
| 793 | { |
| 794 | int fd; |
| 795 | struct sockaddr *soka; |
| 796 | int size; |
| 797 | |
| 798 | sock = SCM_COERCE_OUTPORT (sock); |
| 799 | SCM_VALIDATE_OPFPORT (1, sock); |
| 800 | fd = SCM_FPORT_FDES (sock); |
| 801 | soka = scm_fill_sockaddr (scm_to_int (fam), address, &args, 3, FUNC_NAME, |
| 802 | &size); |
| 803 | if (connect (fd, soka, size) == -1) |
| 804 | { |
| 805 | int save_errno = errno; |
| 806 | |
| 807 | free (soka); |
| 808 | errno = save_errno; |
| 809 | SCM_SYSERROR; |
| 810 | } |
| 811 | free (soka); |
| 812 | return SCM_UNSPECIFIED; |
| 813 | } |
| 814 | #undef FUNC_NAME |
| 815 | |
| 816 | SCM_DEFINE (scm_bind, "bind", 3, 0, 1, |
| 817 | (SCM sock, SCM fam, SCM address, SCM args), |
| 818 | "Assign an address to the socket port @var{sock}.\n" |
| 819 | "Generally this only needs to be done for server sockets,\n" |
| 820 | "so they know where to look for incoming connections. A socket\n" |
| 821 | "without an address will be assigned one automatically when it\n" |
| 822 | "starts communicating.\n\n" |
| 823 | "The format of @var{address} and @var{args} depends\n" |
| 824 | "on the family of the socket.\n\n" |
| 825 | "For a socket of family @code{AF_UNIX}, only @var{address}\n" |
| 826 | "is specified and must be a string with the filename where\n" |
| 827 | "the socket is to be created.\n\n" |
| 828 | "For a socket of family @code{AF_INET}, @var{address}\n" |
| 829 | "must be an integer IPv4 address and @var{args}\n" |
| 830 | "must be a single integer port number.\n\n" |
| 831 | "The values of the following variables can also be used for\n" |
| 832 | "@var{address}:\n\n" |
| 833 | "@defvar INADDR_ANY\n" |
| 834 | "Allow connections from any address.\n" |
| 835 | "@end defvar\n\n" |
| 836 | "@defvar INADDR_LOOPBACK\n" |
| 837 | "The address of the local host using the loopback device.\n" |
| 838 | "@end defvar\n\n" |
| 839 | "@defvar INADDR_BROADCAST\n" |
| 840 | "The broadcast address on the local network.\n" |
| 841 | "@end defvar\n\n" |
| 842 | "@defvar INADDR_NONE\n" |
| 843 | "No address.\n" |
| 844 | "@end defvar\n\n" |
| 845 | "For a socket of family @code{AF_INET6}, @var{address}\n" |
| 846 | "must be an integer IPv6 address and @var{args}\n" |
| 847 | "may be up to three integers:\n" |
| 848 | "port [flowinfo] [scope_id],\n" |
| 849 | "where flowinfo and scope_id default to zero.\n\n" |
| 850 | "The return value is unspecified.") |
| 851 | #define FUNC_NAME s_scm_bind |
| 852 | { |
| 853 | struct sockaddr *soka; |
| 854 | int size; |
| 855 | int fd; |
| 856 | |
| 857 | sock = SCM_COERCE_OUTPORT (sock); |
| 858 | SCM_VALIDATE_OPFPORT (1, sock); |
| 859 | soka = scm_fill_sockaddr (scm_to_int (fam), address, &args, 3, FUNC_NAME, |
| 860 | &size); |
| 861 | fd = SCM_FPORT_FDES (sock); |
| 862 | if (bind (fd, soka, size) == -1) |
| 863 | { |
| 864 | int save_errno = errno; |
| 865 | |
| 866 | free (soka); |
| 867 | errno = save_errno; |
| 868 | SCM_SYSERROR; |
| 869 | } |
| 870 | free (soka); |
| 871 | return SCM_UNSPECIFIED; |
| 872 | } |
| 873 | #undef FUNC_NAME |
| 874 | |
| 875 | SCM_DEFINE (scm_listen, "listen", 2, 0, 0, |
| 876 | (SCM sock, SCM backlog), |
| 877 | "Enable @var{sock} to accept connection\n" |
| 878 | "requests. @var{backlog} is an integer specifying\n" |
| 879 | "the maximum length of the queue for pending connections.\n" |
| 880 | "If the queue fills, new clients will fail to connect until\n" |
| 881 | "the server calls @code{accept} to accept a connection from\n" |
| 882 | "the queue.\n\n" |
| 883 | "The return value is unspecified.") |
| 884 | #define FUNC_NAME s_scm_listen |
| 885 | { |
| 886 | int fd; |
| 887 | sock = SCM_COERCE_OUTPORT (sock); |
| 888 | SCM_VALIDATE_OPFPORT (1, sock); |
| 889 | fd = SCM_FPORT_FDES (sock); |
| 890 | if (listen (fd, scm_to_int (backlog)) == -1) |
| 891 | SCM_SYSERROR; |
| 892 | return SCM_UNSPECIFIED; |
| 893 | } |
| 894 | #undef FUNC_NAME |
| 895 | |
| 896 | /* Put the components of a sockaddr into a new SCM vector. */ |
| 897 | static SCM |
| 898 | scm_addr_vector (const struct sockaddr *address, int addr_size, |
| 899 | const char *proc) |
| 900 | { |
| 901 | short int fam = address->sa_family; |
| 902 | SCM result =SCM_EOL; |
| 903 | |
| 904 | |
| 905 | switch (fam) |
| 906 | { |
| 907 | case AF_INET: |
| 908 | { |
| 909 | const struct sockaddr_in *nad = (struct sockaddr_in *) address; |
| 910 | |
| 911 | result = scm_c_make_vector (3, SCM_UNSPECIFIED); |
| 912 | |
| 913 | SCM_SIMPLE_VECTOR_SET(result, 0, |
| 914 | scm_from_short (fam)); |
| 915 | SCM_SIMPLE_VECTOR_SET(result, 1, |
| 916 | scm_from_ulong (ntohl (nad->sin_addr.s_addr))); |
| 917 | SCM_SIMPLE_VECTOR_SET(result, 2, |
| 918 | scm_from_ushort (ntohs (nad->sin_port))); |
| 919 | } |
| 920 | break; |
| 921 | #ifdef HAVE_IPV6 |
| 922 | case AF_INET6: |
| 923 | { |
| 924 | const struct sockaddr_in6 *nad = (struct sockaddr_in6 *) address; |
| 925 | |
| 926 | result = scm_c_make_vector (5, SCM_UNSPECIFIED); |
| 927 | SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_short (fam)); |
| 928 | SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_ipv6 (nad->sin6_addr.s6_addr)); |
| 929 | SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ushort (ntohs (nad->sin6_port))); |
| 930 | SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_uint32 (nad->sin6_flowinfo)); |
| 931 | #ifdef HAVE_SIN6_SCOPE_ID |
| 932 | SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_ulong (nad->sin6_scope_id)); |
| 933 | #else |
| 934 | SCM_SIMPLE_VECTOR_SET(result, 4, SCM_INUM0); |
| 935 | #endif |
| 936 | } |
| 937 | break; |
| 938 | #endif |
| 939 | #ifdef HAVE_UNIX_DOMAIN_SOCKETS |
| 940 | case AF_UNIX: |
| 941 | { |
| 942 | const struct sockaddr_un *nad = (struct sockaddr_un *) address; |
| 943 | |
| 944 | result = scm_c_make_vector (2, SCM_UNSPECIFIED); |
| 945 | |
| 946 | SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_short (fam)); |
| 947 | /* When addr_size is not enough to cover sun_path, do not try |
| 948 | to access it. */ |
| 949 | if (addr_size <= offsetof (struct sockaddr_un, sun_path)) |
| 950 | SCM_SIMPLE_VECTOR_SET(result, 1, SCM_BOOL_F); |
| 951 | else |
| 952 | SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (nad->sun_path)); |
| 953 | } |
| 954 | break; |
| 955 | #endif |
| 956 | default: |
| 957 | scm_misc_error (proc, "Unrecognised address family: ~A", |
| 958 | scm_list_1 (scm_from_int (fam))); |
| 959 | } |
| 960 | return result; |
| 961 | } |
| 962 | |
| 963 | /* calculate the size of a buffer large enough to hold any supported |
| 964 | sockaddr type. if the buffer isn't large enough, certain system |
| 965 | calls will return a truncated address. */ |
| 966 | |
| 967 | #if defined (HAVE_UNIX_DOMAIN_SOCKETS) |
| 968 | #define MAX_SIZE_UN sizeof (struct sockaddr_un) |
| 969 | #else |
| 970 | #define MAX_SIZE_UN 0 |
| 971 | #endif |
| 972 | |
| 973 | #if defined (HAVE_IPV6) |
| 974 | #define MAX_SIZE_IN6 sizeof (struct sockaddr_in6) |
| 975 | #else |
| 976 | #define MAX_SIZE_IN6 0 |
| 977 | #endif |
| 978 | |
| 979 | #define MAX_ADDR_SIZE max (max (sizeof (struct sockaddr_in), MAX_SIZE_IN6),\ |
| 980 | MAX_SIZE_UN) |
| 981 | |
| 982 | SCM_DEFINE (scm_accept, "accept", 1, 0, 0, |
| 983 | (SCM sock), |
| 984 | "Accept a connection on a bound, listening socket.\n" |
| 985 | "If there\n" |
| 986 | "are no pending connections in the queue, wait until\n" |
| 987 | "one is available unless the non-blocking option has been\n" |
| 988 | "set on the socket.\n\n" |
| 989 | "The return value is a\n" |
| 990 | "pair in which the @emph{car} is a new socket port for the\n" |
| 991 | "connection and\n" |
| 992 | "the @emph{cdr} is an object with address information about the\n" |
| 993 | "client which initiated the connection.\n\n" |
| 994 | "@var{sock} does not become part of the\n" |
| 995 | "connection and will continue to accept new requests.") |
| 996 | #define FUNC_NAME s_scm_accept |
| 997 | { |
| 998 | int fd; |
| 999 | int newfd; |
| 1000 | SCM address; |
| 1001 | SCM newsock; |
| 1002 | int addr_size = MAX_ADDR_SIZE; |
| 1003 | char max_addr[MAX_ADDR_SIZE]; |
| 1004 | struct sockaddr *addr = (struct sockaddr *) max_addr; |
| 1005 | |
| 1006 | sock = SCM_COERCE_OUTPORT (sock); |
| 1007 | SCM_VALIDATE_OPFPORT (1, sock); |
| 1008 | fd = SCM_FPORT_FDES (sock); |
| 1009 | newfd = accept (fd, addr, &addr_size); |
| 1010 | if (newfd == -1) |
| 1011 | SCM_SYSERROR; |
| 1012 | newsock = SCM_SOCK_FD_TO_PORT (newfd); |
| 1013 | address = scm_addr_vector (addr, addr_size, FUNC_NAME); |
| 1014 | return scm_cons (newsock, address); |
| 1015 | } |
| 1016 | #undef FUNC_NAME |
| 1017 | |
| 1018 | SCM_DEFINE (scm_getsockname, "getsockname", 1, 0, 0, |
| 1019 | (SCM sock), |
| 1020 | "Return the address of @var{sock}, in the same form as the\n" |
| 1021 | "object returned by @code{accept}. On many systems the address\n" |
| 1022 | "of a socket in the @code{AF_FILE} namespace cannot be read.") |
| 1023 | #define FUNC_NAME s_scm_getsockname |
| 1024 | { |
| 1025 | int fd; |
| 1026 | int addr_size = MAX_ADDR_SIZE; |
| 1027 | char max_addr[MAX_ADDR_SIZE]; |
| 1028 | struct sockaddr *addr = (struct sockaddr *) max_addr; |
| 1029 | |
| 1030 | sock = SCM_COERCE_OUTPORT (sock); |
| 1031 | SCM_VALIDATE_OPFPORT (1, sock); |
| 1032 | fd = SCM_FPORT_FDES (sock); |
| 1033 | if (getsockname (fd, addr, &addr_size) == -1) |
| 1034 | SCM_SYSERROR; |
| 1035 | return scm_addr_vector (addr, addr_size, FUNC_NAME); |
| 1036 | } |
| 1037 | #undef FUNC_NAME |
| 1038 | |
| 1039 | SCM_DEFINE (scm_getpeername, "getpeername", 1, 0, 0, |
| 1040 | (SCM sock), |
| 1041 | "Return the address that @var{sock}\n" |
| 1042 | "is connected to, in the same form as the object returned by\n" |
| 1043 | "@code{accept}. On many systems the address of a socket in the\n" |
| 1044 | "@code{AF_FILE} namespace cannot be read.") |
| 1045 | #define FUNC_NAME s_scm_getpeername |
| 1046 | { |
| 1047 | int fd; |
| 1048 | int addr_size = MAX_ADDR_SIZE; |
| 1049 | char max_addr[MAX_ADDR_SIZE]; |
| 1050 | struct sockaddr *addr = (struct sockaddr *) max_addr; |
| 1051 | |
| 1052 | sock = SCM_COERCE_OUTPORT (sock); |
| 1053 | SCM_VALIDATE_OPFPORT (1, sock); |
| 1054 | fd = SCM_FPORT_FDES (sock); |
| 1055 | if (getpeername (fd, addr, &addr_size) == -1) |
| 1056 | SCM_SYSERROR; |
| 1057 | return scm_addr_vector (addr, addr_size, FUNC_NAME); |
| 1058 | } |
| 1059 | #undef FUNC_NAME |
| 1060 | |
| 1061 | SCM_DEFINE (scm_recv, "recv!", 2, 1, 0, |
| 1062 | (SCM sock, SCM buf, SCM flags), |
| 1063 | "Receive data from a socket port.\n" |
| 1064 | "@var{sock} must already\n" |
| 1065 | "be bound to the address from which data is to be received.\n" |
| 1066 | "@var{buf} is a string into which\n" |
| 1067 | "the data will be written. The size of @var{buf} limits\n" |
| 1068 | "the amount of\n" |
| 1069 | "data which can be received: in the case of packet\n" |
| 1070 | "protocols, if a packet larger than this limit is encountered\n" |
| 1071 | "then some data\n" |
| 1072 | "will be irrevocably lost.\n\n" |
| 1073 | "The optional @var{flags} argument is a value or\n" |
| 1074 | "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n" |
| 1075 | "The value returned is the number of bytes read from the\n" |
| 1076 | "socket.\n\n" |
| 1077 | "Note that the data is read directly from the socket file\n" |
| 1078 | "descriptor:\n" |
| 1079 | "any unread buffered port data is ignored.") |
| 1080 | #define FUNC_NAME s_scm_recv |
| 1081 | { |
| 1082 | int rv; |
| 1083 | int fd; |
| 1084 | int flg; |
| 1085 | char *dest; |
| 1086 | size_t len; |
| 1087 | |
| 1088 | SCM_VALIDATE_OPFPORT (1, sock); |
| 1089 | SCM_VALIDATE_STRING (2, buf); |
| 1090 | if (SCM_UNBNDP (flags)) |
| 1091 | flg = 0; |
| 1092 | else |
| 1093 | flg = scm_to_int (flags); |
| 1094 | fd = SCM_FPORT_FDES (sock); |
| 1095 | |
| 1096 | len = scm_i_string_length (buf); |
| 1097 | dest = scm_i_string_writable_chars (buf); |
| 1098 | SCM_SYSCALL (rv = recv (fd, dest, len, flg)); |
| 1099 | scm_i_string_stop_writing (); |
| 1100 | |
| 1101 | if (rv == -1) |
| 1102 | SCM_SYSERROR; |
| 1103 | |
| 1104 | scm_remember_upto_here_1 (buf); |
| 1105 | return scm_from_int (rv); |
| 1106 | } |
| 1107 | #undef FUNC_NAME |
| 1108 | |
| 1109 | SCM_DEFINE (scm_send, "send", 2, 1, 0, |
| 1110 | (SCM sock, SCM message, SCM flags), |
| 1111 | "Transmit the string @var{message} on a socket port @var{sock}.\n" |
| 1112 | "@var{sock} must already be bound to a destination address. The\n" |
| 1113 | "value returned is the number of bytes transmitted --\n" |
| 1114 | "it's possible for\n" |
| 1115 | "this to be less than the length of @var{message}\n" |
| 1116 | "if the socket is\n" |
| 1117 | "set to be non-blocking. The optional @var{flags} argument\n" |
| 1118 | "is a value or\n" |
| 1119 | "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n" |
| 1120 | "Note that the data is written directly to the socket\n" |
| 1121 | "file descriptor:\n" |
| 1122 | "any unflushed buffered port data is ignored.") |
| 1123 | #define FUNC_NAME s_scm_send |
| 1124 | { |
| 1125 | int rv; |
| 1126 | int fd; |
| 1127 | int flg; |
| 1128 | const char *src; |
| 1129 | size_t len; |
| 1130 | |
| 1131 | sock = SCM_COERCE_OUTPORT (sock); |
| 1132 | SCM_VALIDATE_OPFPORT (1, sock); |
| 1133 | SCM_VALIDATE_STRING (2, message); |
| 1134 | if (SCM_UNBNDP (flags)) |
| 1135 | flg = 0; |
| 1136 | else |
| 1137 | flg = scm_to_int (flags); |
| 1138 | fd = SCM_FPORT_FDES (sock); |
| 1139 | |
| 1140 | len = scm_i_string_length (message); |
| 1141 | src = scm_i_string_writable_chars (message); |
| 1142 | SCM_SYSCALL (rv = send (fd, src, len, flg)); |
| 1143 | scm_i_string_stop_writing (); |
| 1144 | |
| 1145 | if (rv == -1) |
| 1146 | SCM_SYSERROR; |
| 1147 | |
| 1148 | scm_remember_upto_here_1 (message); |
| 1149 | return scm_from_int (rv); |
| 1150 | } |
| 1151 | #undef FUNC_NAME |
| 1152 | |
| 1153 | SCM_DEFINE (scm_recvfrom, "recvfrom!", 2, 3, 0, |
| 1154 | (SCM sock, SCM str, SCM flags, SCM start, SCM end), |
| 1155 | "Return data from the socket port @var{sock} and also\n" |
| 1156 | "information about where the data was received from.\n" |
| 1157 | "@var{sock} must already be bound to the address from which\n" |
| 1158 | "data is to be received. @code{str}, is a string into which the\n" |
| 1159 | "data will be written. The size of @var{str} limits the amount\n" |
| 1160 | "of data which can be received: in the case of packet protocols,\n" |
| 1161 | "if a packet larger than this limit is encountered then some\n" |
| 1162 | "data will be irrevocably lost.\n\n" |
| 1163 | "The optional @var{flags} argument is a value or bitwise OR of\n" |
| 1164 | "@code{MSG_OOB}, @code{MSG_PEEK}, @code{MSG_DONTROUTE} etc.\n\n" |
| 1165 | "The value returned is a pair: the @emph{car} is the number of\n" |
| 1166 | "bytes read from the socket and the @emph{cdr} an address object\n" |
| 1167 | "in the same form as returned by @code{accept}. The address\n" |
| 1168 | "will given as @code{#f} if not available, as is usually the\n" |
| 1169 | "case for stream sockets.\n\n" |
| 1170 | "The @var{start} and @var{end} arguments specify a substring of\n" |
| 1171 | "@var{str} to which the data should be written.\n\n" |
| 1172 | "Note that the data is read directly from the socket file\n" |
| 1173 | "descriptor: any unread buffered port data is ignored.") |
| 1174 | #define FUNC_NAME s_scm_recvfrom |
| 1175 | { |
| 1176 | int rv; |
| 1177 | int fd; |
| 1178 | int flg; |
| 1179 | char *buf; |
| 1180 | size_t offset; |
| 1181 | size_t cend; |
| 1182 | SCM address; |
| 1183 | int addr_size = MAX_ADDR_SIZE; |
| 1184 | char max_addr[MAX_ADDR_SIZE]; |
| 1185 | struct sockaddr *addr = (struct sockaddr *) max_addr; |
| 1186 | |
| 1187 | SCM_VALIDATE_OPFPORT (1, sock); |
| 1188 | fd = SCM_FPORT_FDES (sock); |
| 1189 | |
| 1190 | SCM_VALIDATE_STRING (2, str); |
| 1191 | scm_i_get_substring_spec (scm_i_string_length (str), |
| 1192 | start, &offset, end, &cend); |
| 1193 | |
| 1194 | if (SCM_UNBNDP (flags)) |
| 1195 | flg = 0; |
| 1196 | else |
| 1197 | SCM_VALIDATE_ULONG_COPY (3, flags, flg); |
| 1198 | |
| 1199 | /* recvfrom will not necessarily return an address. usually nothing |
| 1200 | is returned for stream sockets. */ |
| 1201 | buf = scm_i_string_writable_chars (str); |
| 1202 | addr->sa_family = AF_UNSPEC; |
| 1203 | SCM_SYSCALL (rv = recvfrom (fd, buf + offset, |
| 1204 | cend - offset, flg, |
| 1205 | addr, &addr_size)); |
| 1206 | scm_i_string_stop_writing (); |
| 1207 | |
| 1208 | if (rv == -1) |
| 1209 | SCM_SYSERROR; |
| 1210 | if (addr->sa_family != AF_UNSPEC) |
| 1211 | address = scm_addr_vector (addr, addr_size, FUNC_NAME); |
| 1212 | else |
| 1213 | address = SCM_BOOL_F; |
| 1214 | |
| 1215 | scm_remember_upto_here_1 (str); |
| 1216 | return scm_cons (scm_from_int (rv), address); |
| 1217 | } |
| 1218 | #undef FUNC_NAME |
| 1219 | |
| 1220 | SCM_DEFINE (scm_sendto, "sendto", 4, 0, 1, |
| 1221 | (SCM sock, SCM message, SCM fam, SCM address, SCM args_and_flags), |
| 1222 | "Transmit the string @var{message} on the socket port\n" |
| 1223 | "@var{sock}. The\n" |
| 1224 | "destination address is specified using the @var{fam},\n" |
| 1225 | "@var{address} and\n" |
| 1226 | "@var{args_and_flags} arguments, in a similar way to the\n" |
| 1227 | "@code{connect} procedure. @var{args_and_flags} contains\n" |
| 1228 | "the usual connection arguments optionally followed by\n" |
| 1229 | "a flags argument, which is a value or\n" |
| 1230 | "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n" |
| 1231 | "The value returned is the number of bytes transmitted --\n" |
| 1232 | "it's possible for\n" |
| 1233 | "this to be less than the length of @var{message} if the\n" |
| 1234 | "socket is\n" |
| 1235 | "set to be non-blocking.\n" |
| 1236 | "Note that the data is written directly to the socket\n" |
| 1237 | "file descriptor:\n" |
| 1238 | "any unflushed buffered port data is ignored.") |
| 1239 | #define FUNC_NAME s_scm_sendto |
| 1240 | { |
| 1241 | int rv; |
| 1242 | int fd; |
| 1243 | int flg; |
| 1244 | struct sockaddr *soka; |
| 1245 | int size; |
| 1246 | |
| 1247 | sock = SCM_COERCE_OUTPORT (sock); |
| 1248 | SCM_VALIDATE_FPORT (1, sock); |
| 1249 | SCM_VALIDATE_STRING (2, message); |
| 1250 | fd = SCM_FPORT_FDES (sock); |
| 1251 | soka = scm_fill_sockaddr (scm_to_int (fam), address, &args_and_flags, 4, |
| 1252 | FUNC_NAME, &size); |
| 1253 | if (scm_is_null (args_and_flags)) |
| 1254 | flg = 0; |
| 1255 | else |
| 1256 | { |
| 1257 | SCM_VALIDATE_CONS (5, args_and_flags); |
| 1258 | flg = SCM_NUM2ULONG (5, SCM_CAR (args_and_flags)); |
| 1259 | } |
| 1260 | SCM_SYSCALL (rv = sendto (fd, |
| 1261 | scm_i_string_chars (message), |
| 1262 | scm_i_string_length (message), |
| 1263 | flg, soka, size)); |
| 1264 | if (rv == -1) |
| 1265 | { |
| 1266 | int save_errno = errno; |
| 1267 | free (soka); |
| 1268 | errno = save_errno; |
| 1269 | SCM_SYSERROR; |
| 1270 | } |
| 1271 | free (soka); |
| 1272 | |
| 1273 | scm_remember_upto_here_1 (message); |
| 1274 | return scm_from_int (rv); |
| 1275 | } |
| 1276 | #undef FUNC_NAME |
| 1277 | \f |
| 1278 | |
| 1279 | |
| 1280 | void |
| 1281 | scm_init_socket () |
| 1282 | { |
| 1283 | /* protocol families. */ |
| 1284 | #ifdef AF_UNSPEC |
| 1285 | scm_c_define ("AF_UNSPEC", scm_from_int (AF_UNSPEC)); |
| 1286 | #endif |
| 1287 | #ifdef AF_UNIX |
| 1288 | scm_c_define ("AF_UNIX", scm_from_int (AF_UNIX)); |
| 1289 | #endif |
| 1290 | #ifdef AF_INET |
| 1291 | scm_c_define ("AF_INET", scm_from_int (AF_INET)); |
| 1292 | #endif |
| 1293 | #ifdef AF_INET6 |
| 1294 | scm_c_define ("AF_INET6", scm_from_int (AF_INET6)); |
| 1295 | #endif |
| 1296 | |
| 1297 | #ifdef PF_UNSPEC |
| 1298 | scm_c_define ("PF_UNSPEC", scm_from_int (PF_UNSPEC)); |
| 1299 | #endif |
| 1300 | #ifdef PF_UNIX |
| 1301 | scm_c_define ("PF_UNIX", scm_from_int (PF_UNIX)); |
| 1302 | #endif |
| 1303 | #ifdef PF_INET |
| 1304 | scm_c_define ("PF_INET", scm_from_int (PF_INET)); |
| 1305 | #endif |
| 1306 | #ifdef PF_INET6 |
| 1307 | scm_c_define ("PF_INET6", scm_from_int (PF_INET6)); |
| 1308 | #endif |
| 1309 | |
| 1310 | /* standard addresses. */ |
| 1311 | #ifdef INADDR_ANY |
| 1312 | scm_c_define ("INADDR_ANY", scm_from_ulong (INADDR_ANY)); |
| 1313 | #endif |
| 1314 | #ifdef INADDR_BROADCAST |
| 1315 | scm_c_define ("INADDR_BROADCAST", scm_from_ulong (INADDR_BROADCAST)); |
| 1316 | #endif |
| 1317 | #ifdef INADDR_NONE |
| 1318 | scm_c_define ("INADDR_NONE", scm_from_ulong (INADDR_NONE)); |
| 1319 | #endif |
| 1320 | #ifdef INADDR_LOOPBACK |
| 1321 | scm_c_define ("INADDR_LOOPBACK", scm_from_ulong (INADDR_LOOPBACK)); |
| 1322 | #endif |
| 1323 | |
| 1324 | /* socket types. |
| 1325 | |
| 1326 | SOCK_PACKET is deliberately omitted, the GNU/Linux socket(2) and |
| 1327 | packet(7) advise that it's obsolete and strongly deprecated. */ |
| 1328 | |
| 1329 | #ifdef SOCK_STREAM |
| 1330 | scm_c_define ("SOCK_STREAM", scm_from_int (SOCK_STREAM)); |
| 1331 | #endif |
| 1332 | #ifdef SOCK_DGRAM |
| 1333 | scm_c_define ("SOCK_DGRAM", scm_from_int (SOCK_DGRAM)); |
| 1334 | #endif |
| 1335 | #ifdef SOCK_SEQPACKET |
| 1336 | scm_c_define ("SOCK_SEQPACKET", scm_from_int (SOCK_SEQPACKET)); |
| 1337 | #endif |
| 1338 | #ifdef SOCK_RAW |
| 1339 | scm_c_define ("SOCK_RAW", scm_from_int (SOCK_RAW)); |
| 1340 | #endif |
| 1341 | #ifdef SOCK_RDM |
| 1342 | scm_c_define ("SOCK_RDM", scm_from_int (SOCK_RDM)); |
| 1343 | #endif |
| 1344 | |
| 1345 | /* setsockopt level. */ |
| 1346 | #ifdef SOL_SOCKET |
| 1347 | scm_c_define ("SOL_SOCKET", scm_from_int (SOL_SOCKET)); |
| 1348 | #endif |
| 1349 | #ifdef SOL_IP |
| 1350 | scm_c_define ("SOL_IP", scm_from_int (SOL_IP)); |
| 1351 | #endif |
| 1352 | #ifdef SOL_TCP |
| 1353 | scm_c_define ("SOL_TCP", scm_from_int (SOL_TCP)); |
| 1354 | #endif |
| 1355 | #ifdef SOL_UDP |
| 1356 | scm_c_define ("SOL_UDP", scm_from_int (SOL_UDP)); |
| 1357 | #endif |
| 1358 | |
| 1359 | /* setsockopt names. */ |
| 1360 | #ifdef SO_DEBUG |
| 1361 | scm_c_define ("SO_DEBUG", scm_from_int (SO_DEBUG)); |
| 1362 | #endif |
| 1363 | #ifdef SO_REUSEADDR |
| 1364 | scm_c_define ("SO_REUSEADDR", scm_from_int (SO_REUSEADDR)); |
| 1365 | #endif |
| 1366 | #ifdef SO_STYLE |
| 1367 | scm_c_define ("SO_STYLE", scm_from_int (SO_STYLE)); |
| 1368 | #endif |
| 1369 | #ifdef SO_TYPE |
| 1370 | scm_c_define ("SO_TYPE", scm_from_int (SO_TYPE)); |
| 1371 | #endif |
| 1372 | #ifdef SO_ERROR |
| 1373 | scm_c_define ("SO_ERROR", scm_from_int (SO_ERROR)); |
| 1374 | #endif |
| 1375 | #ifdef SO_DONTROUTE |
| 1376 | scm_c_define ("SO_DONTROUTE", scm_from_int (SO_DONTROUTE)); |
| 1377 | #endif |
| 1378 | #ifdef SO_BROADCAST |
| 1379 | scm_c_define ("SO_BROADCAST", scm_from_int (SO_BROADCAST)); |
| 1380 | #endif |
| 1381 | #ifdef SO_SNDBUF |
| 1382 | scm_c_define ("SO_SNDBUF", scm_from_int (SO_SNDBUF)); |
| 1383 | #endif |
| 1384 | #ifdef SO_RCVBUF |
| 1385 | scm_c_define ("SO_RCVBUF", scm_from_int (SO_RCVBUF)); |
| 1386 | #endif |
| 1387 | #ifdef SO_KEEPALIVE |
| 1388 | scm_c_define ("SO_KEEPALIVE", scm_from_int (SO_KEEPALIVE)); |
| 1389 | #endif |
| 1390 | #ifdef SO_OOBINLINE |
| 1391 | scm_c_define ("SO_OOBINLINE", scm_from_int (SO_OOBINLINE)); |
| 1392 | #endif |
| 1393 | #ifdef SO_NO_CHECK |
| 1394 | scm_c_define ("SO_NO_CHECK", scm_from_int (SO_NO_CHECK)); |
| 1395 | #endif |
| 1396 | #ifdef SO_PRIORITY |
| 1397 | scm_c_define ("SO_PRIORITY", scm_from_int (SO_PRIORITY)); |
| 1398 | #endif |
| 1399 | #ifdef SO_LINGER |
| 1400 | scm_c_define ("SO_LINGER", scm_from_int (SO_LINGER)); |
| 1401 | #endif |
| 1402 | |
| 1403 | /* recv/send options. */ |
| 1404 | #ifdef MSG_OOB |
| 1405 | scm_c_define ("MSG_OOB", scm_from_int (MSG_OOB)); |
| 1406 | #endif |
| 1407 | #ifdef MSG_PEEK |
| 1408 | scm_c_define ("MSG_PEEK", scm_from_int (MSG_PEEK)); |
| 1409 | #endif |
| 1410 | #ifdef MSG_DONTROUTE |
| 1411 | scm_c_define ("MSG_DONTROUTE", scm_from_int (MSG_DONTROUTE)); |
| 1412 | #endif |
| 1413 | |
| 1414 | #ifdef __MINGW32__ |
| 1415 | scm_i_init_socket_Win32 (); |
| 1416 | #endif |
| 1417 | |
| 1418 | scm_add_feature ("socket"); |
| 1419 | |
| 1420 | #include "libguile/socket.x" |
| 1421 | } |
| 1422 | |
| 1423 | |
| 1424 | /* |
| 1425 | Local Variables: |
| 1426 | c-file-style: "gnu" |
| 1427 | End: |
| 1428 | */ |