--- /dev/null
+/* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+#include <gmp.h>
+
+#include "libguile/_scm.h"
+#include "libguile/unif.h"
+#include "libguile/feature.h"
+#include "libguile/fports.h"
+#include "libguile/strings.h"
+#include "libguile/vectors.h"
+#include "libguile/dynwind.h"
+
+#include "libguile/validate.h"
+#include "libguile/socket.h"
+
+#include "libguile/iselect.h"
+
+#ifdef __MINGW32__
+#include "win32-socket.h"
+#endif
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <sys/types.h>
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#else
+#include <sys/socket.h>
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+#include <sys/un.h>
+#endif
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#endif
+
+#if defined (HAVE_UNIX_DOMAIN_SOCKETS) && !defined (SUN_LEN)
+#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ + strlen ((ptr)->sun_path))
+#endif
+
+/* The largest possible socket address. Wrapping it in a union guarantees
+ that the compiler will make it suitably aligned. */
+typedef union
+{
+ struct sockaddr sockaddr;
+ struct sockaddr_in sockaddr_in;
+
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+ struct sockaddr_un sockaddr_un;
+#endif
+#ifdef HAVE_IPV6
+ struct sockaddr_in6 sockaddr_in6;
+#endif
+} scm_t_max_sockaddr;
+
+
+/* Maximum size of a socket address. */
+#define MAX_ADDR_SIZE (sizeof (scm_t_max_sockaddr))
+
+
+\f
+
+SCM_DEFINE (scm_htons, "htons", 1, 0, 0,
+ (SCM value),
+ "Convert a 16 bit quantity from host to network byte ordering.\n"
+ "@var{value} is packed into 2 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_htons
+{
+ return scm_from_ushort (htons (scm_to_ushort (value)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0,
+ (SCM value),
+ "Convert a 16 bit quantity from network to host byte ordering.\n"
+ "@var{value} is packed into 2 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_ntohs
+{
+ return scm_from_ushort (ntohs (scm_to_ushort (value)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0,
+ (SCM value),
+ "Convert a 32 bit quantity from host to network byte ordering.\n"
+ "@var{value} is packed into 4 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_htonl
+{
+ return scm_from_ulong (htonl (scm_to_uint32 (value)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0,
+ (SCM value),
+ "Convert a 32 bit quantity from network to host byte ordering.\n"
+ "@var{value} is packed into 4 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_ntohl
+{
+ return scm_from_ulong (ntohl (scm_to_uint32 (value)));
+}
+#undef FUNC_NAME
+
+#ifndef HAVE_INET_ATON
+/* for our definition in inet_aton.c, not usually needed. */
+extern int inet_aton ();
+#endif
+
+SCM_DEFINE (scm_inet_aton, "inet-aton", 1, 0, 0,
+ (SCM address),
+ "Convert an IPv4 Internet address from printable string\n"
+ "(dotted decimal notation) to an integer. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-aton \"127.0.0.1\") @result{} 2130706433\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_aton
+{
+ struct in_addr soka;
+ char *c_address;
+ int rv;
+
+ c_address = scm_to_locale_string (address);
+ rv = inet_aton (c_address, &soka);
+ free (c_address);
+ if (rv == 0)
+ SCM_MISC_ERROR ("bad address", SCM_EOL);
+ return scm_from_ulong (ntohl (soka.s_addr));
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_inet_ntoa, "inet-ntoa", 1, 0, 0,
+ (SCM inetid),
+ "Convert an IPv4 Internet address to a printable\n"
+ "(dotted decimal notation) string. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-ntoa 2130706433) @result{} \"127.0.0.1\"\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_ntoa
+{
+ struct in_addr addr;
+ char *s;
+ SCM answer;
+ addr.s_addr = htonl (SCM_NUM2ULONG (1, inetid));
+ s = inet_ntoa (addr);
+ answer = scm_from_locale_string (s);
+ return answer;
+}
+#undef FUNC_NAME
+
+#ifdef HAVE_INET_NETOF
+SCM_DEFINE (scm_inet_netof, "inet-netof", 1, 0, 0,
+ (SCM address),
+ "Return the network number part of the given IPv4\n"
+ "Internet address. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-netof 2130706433) @result{} 127\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_netof
+{
+ struct in_addr addr;
+ addr.s_addr = htonl (SCM_NUM2ULONG (1, address));
+ return scm_from_ulong (inet_netof (addr));
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_INET_LNAOF
+SCM_DEFINE (scm_lnaof, "inet-lnaof", 1, 0, 0,
+ (SCM address),
+ "Return the local-address-with-network part of the given\n"
+ "IPv4 Internet address, using the obsolete class A/B/C system.\n"
+ "E.g.,\n\n"
+ "@lisp\n"
+ "(inet-lnaof 2130706433) @result{} 1\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_lnaof
+{
+ struct in_addr addr;
+ addr.s_addr = htonl (SCM_NUM2ULONG (1, address));
+ return scm_from_ulong (inet_lnaof (addr));
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_INET_MAKEADDR
+SCM_DEFINE (scm_inet_makeaddr, "inet-makeaddr", 2, 0, 0,
+ (SCM net, SCM lna),
+ "Make an IPv4 Internet address by combining the network number\n"
+ "@var{net} with the local-address-within-network number\n"
+ "@var{lna}. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-makeaddr 127 1) @result{} 2130706433\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_makeaddr
+{
+ struct in_addr addr;
+ unsigned long netnum;
+ unsigned long lnanum;
+
+ netnum = SCM_NUM2ULONG (1, net);
+ lnanum = SCM_NUM2ULONG (2, lna);
+ addr = inet_makeaddr (netnum, lnanum);
+ return scm_from_ulong (ntohl (addr.s_addr));
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_IPV6
+
+/* flip a 128 bit IPv6 address between host and network order. */
+#ifdef WORDS_BIGENDIAN
+#define FLIP_NET_HOST_128(addr)
+#else
+#define FLIP_NET_HOST_128(addr)\
+{\
+ int i;\
+ \
+ for (i = 0; i < 8; i++)\
+ {\
+ scm_t_uint8 c = (addr)[i];\
+ \
+ (addr)[i] = (addr)[15 - i];\
+ (addr)[15 - i] = c;\
+ }\
+}
+#endif
+
+#ifdef WORDS_BIGENDIAN
+#define FLIPCPY_NET_HOST_128(dest, src) memcpy (dest, src, 16)
+#else
+#define FLIPCPY_NET_HOST_128(dest, src) \
+{ \
+ const scm_t_uint8 *tmp_srcp = (src) + 15; \
+ scm_t_uint8 *tmp_destp = (dest); \
+ \
+ do { \
+ *tmp_destp++ = *tmp_srcp--; \
+ } while (tmp_srcp != (src)); \
+}
+#endif
+
+
+#if (SIZEOF_SCM_T_BITS * SCM_CHAR_BIT) > 128
+#error "Assumption that scm_t_bits <= 128 bits has been violated."
+#endif
+
+#if (SIZEOF_UNSIGNED_LONG * SCM_CHAR_BIT) > 128
+#error "Assumption that unsigned long <= 128 bits has been violated."
+#endif
+
+#if (SIZEOF_UNSIGNED_LONG_LONG * SCM_CHAR_BIT) > 128
+#error "Assumption that unsigned long long <= 128 bits has been violated."
+#endif
+
+/* convert a 128 bit IPv6 address in network order to a host ordered
+ SCM integer. */
+static SCM
+scm_from_ipv6 (const scm_t_uint8 *src)
+{
+ SCM result = scm_i_mkbig ();
+ mpz_import (SCM_I_BIG_MPZ (result),
+ 1, /* chunk */
+ 1, /* big-endian chunk ordering */
+ 16, /* chunks are 16 bytes long */
+ 1, /* big-endian byte ordering */
+ 0, /* "nails" -- leading unused bits per chunk */
+ src);
+ return scm_i_normbig (result);
+}
+
+/* convert a host ordered SCM integer to a 128 bit IPv6 address in
+ network order. */
+static void
+scm_to_ipv6 (scm_t_uint8 dst[16], SCM src)
+{
+ if (SCM_I_INUMP (src))
+ {
+ scm_t_signed_bits n = SCM_I_INUM (src);
+ if (n < 0)
+ scm_out_of_range (NULL, src);
+#ifdef WORDS_BIGENDIAN
+ memset (dst, 0, 16 - sizeof (scm_t_signed_bits));
+ memcpy (dst + (16 - sizeof (scm_t_signed_bits)),
+ &n,
+ sizeof (scm_t_signed_bits));
+#else
+ memset (dst + sizeof (scm_t_signed_bits),
+ 0,
+ 16 - sizeof (scm_t_signed_bits));
+ /* FIXME: this pair of ops is kinda wasteful -- should rewrite as
+ a single loop perhaps, similar to the handling of bignums. */
+ memcpy (dst, &n, sizeof (scm_t_signed_bits));
+ FLIP_NET_HOST_128 (dst);
+#endif
+ }
+ else if (SCM_BIGP (src))
+ {
+ size_t count;
+
+ if ((mpz_sgn (SCM_I_BIG_MPZ (src)) < 0)
+ || mpz_sizeinbase (SCM_I_BIG_MPZ (src), 2) > 128)
+ scm_out_of_range (NULL, src);
+
+ memset (dst, 0, 16);
+ mpz_export (dst,
+ &count,
+ 1, /* big-endian chunk ordering */
+ 16, /* chunks are 16 bytes long */
+ 1, /* big-endian byte ordering */
+ 0, /* "nails" -- leading unused bits per chunk */
+ SCM_I_BIG_MPZ (src));
+ scm_remember_upto_here_1 (src);
+ }
+ else
+ scm_wrong_type_arg_msg ("scm_to_ipv6", 0, src, "integer");
+}
+
+#ifdef HAVE_INET_PTON
+SCM_DEFINE (scm_inet_pton, "inet-pton", 2, 0, 0,
+ (SCM family, SCM address),
+ "Convert a string containing a printable network address to\n"
+ "an integer address. Note that unlike the C version of this\n"
+ "function,\n"
+ "the result is an integer with normal host byte ordering.\n"
+ "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-pton AF_INET \"127.0.0.1\") @result{} 2130706433\n"
+ "(inet-pton AF_INET6 \"::1\") @result{} 1\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_pton
+{
+ int af;
+ char *src;
+ scm_t_uint32 dst[4];
+ int rv, eno;
+
+ af = scm_to_int (family);
+ SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6);
+ src = scm_to_locale_string (address);
+ rv = inet_pton (af, src, dst);
+ eno = errno;
+ free (src);
+ errno = eno;
+ if (rv == -1)
+ SCM_SYSERROR;
+ else if (rv == 0)
+ SCM_MISC_ERROR ("Bad address", SCM_EOL);
+ if (af == AF_INET)
+ return scm_from_ulong (ntohl (*dst));
+ else
+ return scm_from_ipv6 ((scm_t_uint8 *) dst);
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_INET_NTOP
+SCM_DEFINE (scm_inet_ntop, "inet-ntop", 2, 0, 0,
+ (SCM family, SCM address),
+ "Convert a network address into a printable string.\n"
+ "Note that unlike the C version of this function,\n"
+ "the input is an integer with normal host byte ordering.\n"
+ "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-ntop AF_INET 2130706433) @result{} \"127.0.0.1\"\n"
+ "(inet-ntop AF_INET6 (- (expt 2 128) 1))\n"
+ " @result{} \"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff\"\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_ntop
+{
+ int af;
+#ifdef INET6_ADDRSTRLEN
+ char dst[INET6_ADDRSTRLEN];
+#else
+ char dst[46];
+#endif
+ const char *result;
+
+ af = scm_to_int (family);
+ SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6);
+ if (af == AF_INET)
+ {
+ scm_t_uint32 addr4;
+
+ addr4 = htonl (SCM_NUM2ULONG (2, address));
+ result = inet_ntop (af, &addr4, dst, sizeof (dst));
+ }
+ else
+ {
+ char addr6[16];
+
+ scm_to_ipv6 ((scm_t_uint8 *) addr6, address);
+ result = inet_ntop (af, &addr6, dst, sizeof (dst));
+ }
+
+ if (result == NULL)
+ SCM_SYSERROR;
+
+ return scm_from_locale_string (dst);
+}
+#undef FUNC_NAME
+#endif
+
+#endif /* HAVE_IPV6 */
+
+SCM_SYMBOL (sym_socket, "socket");
+
+#define SCM_SOCK_FD_TO_PORT(fd) scm_fdes_to_port (fd, "r+0", sym_socket)
+
+SCM_DEFINE (scm_socket, "socket", 3, 0, 0,
+ (SCM family, SCM style, SCM proto),
+ "Return a new socket port of the type specified by @var{family},\n"
+ "@var{style} and @var{proto}. All three parameters are\n"
+ "integers. Supported values for @var{family} are\n"
+ "@code{AF_UNIX}, @code{AF_INET} and @code{AF_INET6}.\n"
+ "Typical values for @var{style} are @code{SOCK_STREAM},\n"
+ "@code{SOCK_DGRAM} and @code{SOCK_RAW}.\n\n"
+ "@var{proto} can be obtained from a protocol name using\n"
+ "@code{getprotobyname}. A value of zero specifies the default\n"
+ "protocol, which is usually right.\n\n"
+ "A single socket port cannot by used for communication until it\n"
+ "has been connected to another socket.")
+#define FUNC_NAME s_scm_socket
+{
+ int fd;
+
+ fd = socket (scm_to_int (family),
+ scm_to_int (style),
+ scm_to_int (proto));
+ if (fd == -1)
+ SCM_SYSERROR;
+ return SCM_SOCK_FD_TO_PORT (fd);
+}
+#undef FUNC_NAME
+
+#ifdef HAVE_SOCKETPAIR
+SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0,
+ (SCM family, SCM style, SCM proto),
+ "Return a pair of connected (but unnamed) socket ports of the\n"
+ "type specified by @var{family}, @var{style} and @var{proto}.\n"
+ "Many systems support only socket pairs of the @code{AF_UNIX}\n"
+ "family. Zero is likely to be the only meaningful value for\n"
+ "@var{proto}.")
+#define FUNC_NAME s_scm_socketpair
+{
+ int fam;
+ int fd[2];
+
+ fam = scm_to_int (family);
+
+ if (socketpair (fam, scm_to_int (style), scm_to_int (proto), fd) == -1)
+ SCM_SYSERROR;
+
+ return scm_cons (SCM_SOCK_FD_TO_PORT (fd[0]), SCM_SOCK_FD_TO_PORT (fd[1]));
+}
+#undef FUNC_NAME
+#endif
+
+/* Possible results for `getsockopt ()'. Wrapping it into a union guarantees
+ suitable alignment. */
+typedef union
+{
+#ifdef HAVE_STRUCT_LINGER
+ struct linger linger;
+#endif
+ size_t size;
+ int integer;
+} scm_t_getsockopt_result;
+
+SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0,
+ (SCM sock, SCM level, SCM optname),
+ "Return an option value from socket port @var{sock}.\n"
+ "\n"
+ "@var{level} is an integer specifying a protocol layer, either\n"
+ "@code{SOL_SOCKET} for socket level options, or a protocol\n"
+ "number from the @code{IPPROTO} constants or @code{getprotoent}\n"
+ "(@pxref{Network Databases}).\n"
+ "\n"
+ "@defvar SOL_SOCKET\n"
+ "@defvarx IPPROTO_IP\n"
+ "@defvarx IPPROTO_TCP\n"
+ "@defvarx IPPROTO_UDP\n"
+ "@end defvar\n"
+ "\n"
+ "@var{optname} is an integer specifying an option within the\n"
+ "protocol layer.\n"
+ "\n"
+ "For @code{SOL_SOCKET} level the following @var{optname}s are\n"
+ "defined (when provided by the system). For their meaning see\n"
+ "@ref{Socket-Level Options,,, libc, The GNU C Library Reference\n"
+ "Manual}, or @command{man 7 socket}.\n"
+ "\n"
+ "@defvar SO_DEBUG\n"
+ "@defvarx SO_REUSEADDR\n"
+ "@defvarx SO_STYLE\n"
+ "@defvarx SO_TYPE\n"
+ "@defvarx SO_ERROR\n"
+ "@defvarx SO_DONTROUTE\n"
+ "@defvarx SO_BROADCAST\n"
+ "@defvarx SO_SNDBUF\n"
+ "@defvarx SO_RCVBUF\n"
+ "@defvarx SO_KEEPALIVE\n"
+ "@defvarx SO_OOBINLINE\n"
+ "@defvarx SO_NO_CHECK\n"
+ "@defvarx SO_PRIORITY\n"
+ "The value returned is an integer.\n"
+ "@end defvar\n"
+ "\n"
+ "@defvar SO_LINGER\n"
+ "The @var{value} returned is a pair of integers\n"
+ "@code{(@var{ENABLE} . @var{TIMEOUT})}. On old systems without\n"
+ "timeout support (ie.@: without @code{struct linger}), only\n"
+ "@var{ENABLE} has an effect but the value in Guile is always a\n"
+ "pair.\n"
+ "@end defvar")
+#define FUNC_NAME s_scm_getsockopt
+{
+ int fd;
+ /* size of optval is the largest supported option. */
+ scm_t_getsockopt_result optval;
+ socklen_t optlen = sizeof (optval);
+ int ilevel;
+ int ioptname;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ ilevel = scm_to_int (level);
+ ioptname = scm_to_int (optname);
+
+ fd = SCM_FPORT_FDES (sock);
+ if (getsockopt (fd, ilevel, ioptname, (void *) &optval, &optlen) == -1)
+ SCM_SYSERROR;
+
+ if (ilevel == SOL_SOCKET)
+ {
+#ifdef SO_LINGER
+ if (ioptname == SO_LINGER)
+ {
+#ifdef HAVE_STRUCT_LINGER
+ struct linger *ling = (struct linger *) &optval;
+
+ return scm_cons (scm_from_long (ling->l_onoff),
+ scm_from_long (ling->l_linger));
+#else
+ return scm_cons (scm_from_long (*(int *) &optval),
+ scm_from_int (0));
+#endif
+ }
+ else
+#endif
+ if (0
+#ifdef SO_SNDBUF
+ || ioptname == SO_SNDBUF
+#endif
+#ifdef SO_RCVBUF
+ || ioptname == SO_RCVBUF
+#endif
+ )
+ {
+ return scm_from_size_t (*(size_t *) &optval);
+ }
+ }
+ return scm_from_int (*(int *) &optval);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0,
+ (SCM sock, SCM level, SCM optname, SCM value),
+ "Set an option on socket port @var{sock}. The return value is\n"
+ "unspecified.\n"
+ "\n"
+ "@var{level} is an integer specifying a protocol layer, either\n"
+ "@code{SOL_SOCKET} for socket level options, or a protocol\n"
+ "number from the @code{IPPROTO} constants or @code{getprotoent}\n"
+ "(@pxref{Network Databases}).\n"
+ "\n"
+ "@defvar SOL_SOCKET\n"
+ "@defvarx IPPROTO_IP\n"
+ "@defvarx IPPROTO_TCP\n"
+ "@defvarx IPPROTO_UDP\n"
+ "@end defvar\n"
+ "\n"
+ "@var{optname} is an integer specifying an option within the\n"
+ "protocol layer.\n"
+ "\n"
+ "For @code{SOL_SOCKET} level the following @var{optname}s are\n"
+ "defined (when provided by the system). For their meaning see\n"
+ "@ref{Socket-Level Options,,, libc, The GNU C Library Reference\n"
+ "Manual}, or @command{man 7 socket}.\n"
+ "\n"
+ "@defvar SO_DEBUG\n"
+ "@defvarx SO_REUSEADDR\n"
+ "@defvarx SO_STYLE\n"
+ "@defvarx SO_TYPE\n"
+ "@defvarx SO_ERROR\n"
+ "@defvarx SO_DONTROUTE\n"
+ "@defvarx SO_BROADCAST\n"
+ "@defvarx SO_SNDBUF\n"
+ "@defvarx SO_RCVBUF\n"
+ "@defvarx SO_KEEPALIVE\n"
+ "@defvarx SO_OOBINLINE\n"
+ "@defvarx SO_NO_CHECK\n"
+ "@defvarx SO_PRIORITY\n"
+ "@var{value} is an integer.\n"
+ "@end defvar\n"
+ "\n"
+ "@defvar SO_LINGER\n"
+ "@var{value} is a pair of integers @code{(@var{ENABLE}\n"
+ ". @var{TIMEOUT})}. On old systems without timeout support\n"
+ "(ie.@: without @code{struct linger}), only @var{ENABLE} has an\n"
+ "effect but the value in Guile is always a pair.\n"
+ "@end defvar\n"
+ "\n"
+ "@c Note that we refer only to ``man ip'' here. On GNU/Linux it's\n"
+ "@c ``man 7 ip'' but on NetBSD it's ``man 4 ip''.\n"
+ "@c \n"
+ "For IP level (@code{IPPROTO_IP}) the following @var{optname}s\n"
+ "are defined (when provided by the system). See @command{man\n"
+ "ip} for what they mean.\n"
+ "\n"
+ "@defvar IP_ADD_MEMBERSHIP\n"
+ "@defvarx IP_DROP_MEMBERSHIP\n"
+ "These can be used only with @code{setsockopt}, not\n"
+ "@code{getsockopt}. @var{value} is a pair\n"
+ "@code{(@var{MULTIADDR} . @var{INTERFACEADDR})} of IPv4\n"
+ "addresses (@pxref{Network Address Conversion}).\n"
+ "@var{MULTIADDR} is a multicast address to be added to or\n"
+ "dropped from the interface @var{INTERFACEADDR}.\n"
+ "@var{INTERFACEADDR} can be @code{INADDR_ANY} to have the system\n"
+ "select the interface. @var{INTERFACEADDR} can also be an\n"
+ "interface index number, on systems supporting that.\n"
+ "@end defvar")
+#define FUNC_NAME s_scm_setsockopt
+{
+ int fd;
+
+ int opt_int;
+#ifdef HAVE_STRUCT_LINGER
+ struct linger opt_linger;
+#endif
+
+#if HAVE_STRUCT_IP_MREQ
+ struct ip_mreq opt_mreq;
+#endif
+
+ const void *optval = NULL;
+ socklen_t optlen = 0;
+
+ int ilevel, ioptname;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+
+ SCM_VALIDATE_OPFPORT (1, sock);
+ ilevel = scm_to_int (level);
+ ioptname = scm_to_int (optname);
+
+ fd = SCM_FPORT_FDES (sock);
+
+ if (ilevel == SOL_SOCKET)
+ {
+#ifdef SO_LINGER
+ if (ioptname == SO_LINGER)
+ {
+#ifdef HAVE_STRUCT_LINGER
+ SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME);
+ opt_linger.l_onoff = scm_to_int (SCM_CAR (value));
+ opt_linger.l_linger = scm_to_int (SCM_CDR (value));
+ optlen = sizeof (struct linger);
+ optval = &opt_linger;
+#else
+ SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME);
+ opt_int = scm_to_int (SCM_CAR (value));
+ /* timeout is ignored, but may as well validate it. */
+ scm_to_int (SCM_CDR (value));
+ optlen = sizeof (int);
+ optval = &opt_int;
+#endif
+ }
+ else
+#endif
+ if (0
+#ifdef SO_SNDBUF
+ || ioptname == SO_SNDBUF
+#endif
+#ifdef SO_RCVBUF
+ || ioptname == SO_RCVBUF
+#endif
+ )
+ {
+ opt_int = scm_to_int (value);
+ optlen = sizeof (size_t);
+ optval = &opt_int;
+ }
+ }
+
+#if HAVE_STRUCT_IP_MREQ
+ if (ilevel == IPPROTO_IP &&
+ (ioptname == IP_ADD_MEMBERSHIP || ioptname == IP_DROP_MEMBERSHIP))
+ {
+ /* Fourth argument must be a pair of addresses. */
+ SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME);
+ opt_mreq.imr_multiaddr.s_addr = htonl (scm_to_ulong (SCM_CAR (value)));
+ opt_mreq.imr_interface.s_addr = htonl (scm_to_ulong (SCM_CDR (value)));
+ optlen = sizeof (opt_mreq);
+ optval = &opt_mreq;
+ }
+#endif
+
+ if (optval == NULL)
+ {
+ /* Most options take an int. */
+ opt_int = scm_to_int (value);
+ optlen = sizeof (int);
+ optval = &opt_int;
+ }
+
+ if (setsockopt (fd, ilevel, ioptname, optval, optlen) == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0,
+ (SCM sock, SCM how),
+ "Sockets can be closed simply by using @code{close-port}. The\n"
+ "@code{shutdown} procedure allows reception or transmission on a\n"
+ "connection to be shut down individually, according to the parameter\n"
+ "@var{how}:\n\n"
+ "@table @asis\n"
+ "@item 0\n"
+ "Stop receiving data for this socket. If further data arrives, reject it.\n"
+ "@item 1\n"
+ "Stop trying to transmit data from this socket. Discard any\n"
+ "data waiting to be sent. Stop looking for acknowledgement of\n"
+ "data already sent; don't retransmit it if it is lost.\n"
+ "@item 2\n"
+ "Stop both reception and transmission.\n"
+ "@end table\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_shutdown
+{
+ int fd;
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (shutdown (fd, scm_to_signed_integer (how, 0, 2)) == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* convert fam/address/args into a sockaddr of the appropriate type.
+ args is modified by removing the arguments actually used.
+ which_arg and proc are used when reporting errors:
+ which_arg is the position of address in the original argument list.
+ proc is the name of the original procedure.
+ size returns the size of the structure allocated. */
+
+static struct sockaddr *
+scm_fill_sockaddr (int fam, SCM address, SCM *args, int which_arg,
+ const char *proc, size_t *size)
+#define FUNC_NAME proc
+{
+ switch (fam)
+ {
+ case AF_INET:
+ {
+ struct sockaddr_in *soka;
+ unsigned long addr;
+ int port;
+
+ SCM_VALIDATE_ULONG_COPY (which_arg, address, addr);
+ SCM_VALIDATE_CONS (which_arg + 1, *args);
+ port = scm_to_int (SCM_CAR (*args));
+ *args = SCM_CDR (*args);
+ soka = (struct sockaddr_in *) scm_malloc (sizeof (struct sockaddr_in));
+
+#if HAVE_STRUCT_SOCKADDR_SIN_LEN
+ soka->sin_len = sizeof (struct sockaddr_in);
+#endif
+ soka->sin_family = AF_INET;
+ soka->sin_addr.s_addr = htonl (addr);
+ soka->sin_port = htons (port);
+ *size = sizeof (struct sockaddr_in);
+ return (struct sockaddr *) soka;
+ }
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ {
+ /* see RFC2553. */
+ int port;
+ struct sockaddr_in6 *soka;
+ unsigned long flowinfo = 0;
+ unsigned long scope_id = 0;
+
+ SCM_VALIDATE_CONS (which_arg + 1, *args);
+ port = scm_to_int (SCM_CAR (*args));
+ *args = SCM_CDR (*args);
+ if (scm_is_pair (*args))
+ {
+ SCM_VALIDATE_ULONG_COPY (which_arg + 2, SCM_CAR (*args), flowinfo);
+ *args = SCM_CDR (*args);
+ if (scm_is_pair (*args))
+ {
+ SCM_VALIDATE_ULONG_COPY (which_arg + 3, SCM_CAR (*args),
+ scope_id);
+ *args = SCM_CDR (*args);
+ }
+ }
+ soka = (struct sockaddr_in6 *) scm_malloc (sizeof (struct sockaddr_in6));
+
+#if HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN
+ soka->sin6_len = sizeof (struct sockaddr_in6);
+#endif
+ soka->sin6_family = AF_INET6;
+ scm_to_ipv6 (soka->sin6_addr.s6_addr, address);
+ soka->sin6_port = htons (port);
+ soka->sin6_flowinfo = flowinfo;
+#ifdef HAVE_SIN6_SCOPE_ID
+ soka->sin6_scope_id = scope_id;
+#endif
+ *size = sizeof (struct sockaddr_in6);
+ return (struct sockaddr *) soka;
+ }
+#endif
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+ case AF_UNIX:
+ {
+ struct sockaddr_un *soka;
+ int addr_size;
+ char *c_address;
+
+ scm_dynwind_begin (0);
+
+ c_address = scm_to_locale_string (address);
+ scm_dynwind_free (c_address);
+
+ /* the static buffer size in sockaddr_un seems to be arbitrary
+ and not necessarily a hard limit. e.g., the glibc manual
+ suggests it may be possible to declare it size 0. let's
+ ignore it. if the O/S doesn't like the size it will cause
+ connect/bind etc., to fail. sun_path is always the last
+ member of the structure. */
+ addr_size = sizeof (struct sockaddr_un)
+ + max (0, strlen (c_address) + 1 - (sizeof soka->sun_path));
+ soka = (struct sockaddr_un *) scm_malloc (addr_size);
+ memset (soka, 0, addr_size); /* for sun_len: see sin_len above. */
+ soka->sun_family = AF_UNIX;
+ strcpy (soka->sun_path, c_address);
+ *size = SUN_LEN (soka);
+
+ scm_dynwind_end ();
+ return (struct sockaddr *) soka;
+ }
+#endif
+ default:
+ scm_out_of_range (proc, scm_from_int (fam));
+ }
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_connect, "connect", 2, 1, 1,
+ (SCM sock, SCM fam_or_sockaddr, SCM address, SCM args),
+ "Initiate a connection from a socket using a specified address\n"
+ "family to the address\n"
+ "specified by @var{address} and possibly @var{args}.\n"
+ "The format required for @var{address}\n"
+ "and @var{args} depends on the family of the socket.\n\n"
+ "For a socket of family @code{AF_UNIX},\n"
+ "only @var{address} is specified and must be a string with the\n"
+ "filename where the socket is to be created.\n\n"
+ "For a socket of family @code{AF_INET},\n"
+ "@var{address} must be an integer IPv4 host address and\n"
+ "@var{args} must be a single integer port number.\n\n"
+ "For a socket of family @code{AF_INET6},\n"
+ "@var{address} must be an integer IPv6 host address and\n"
+ "@var{args} may be up to three integers:\n"
+ "port [flowinfo] [scope_id],\n"
+ "where flowinfo and scope_id default to zero.\n\n"
+ "Alternatively, the second argument can be a socket address object "
+ "as returned by @code{make-socket-address}, in which case the "
+ "no additional arguments should be passed.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_connect
+{
+ int fd;
+ struct sockaddr *soka;
+ size_t size;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+
+ if (address == SCM_UNDEFINED)
+ /* No third argument was passed to FAM_OR_SOCKADDR must actually be a
+ `socket address' object. */
+ soka = scm_to_sockaddr (fam_or_sockaddr, &size);
+ else
+ soka = scm_fill_sockaddr (scm_to_int (fam_or_sockaddr), address,
+ &args, 3, FUNC_NAME, &size);
+
+ if (connect (fd, soka, size) == -1)
+ {
+ int save_errno = errno;
+
+ free (soka);
+ errno = save_errno;
+ SCM_SYSERROR;
+ }
+ free (soka);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_bind, "bind", 2, 1, 1,
+ (SCM sock, SCM fam_or_sockaddr, SCM address, SCM args),
+ "Assign an address to the socket port @var{sock}.\n"
+ "Generally this only needs to be done for server sockets,\n"
+ "so they know where to look for incoming connections. A socket\n"
+ "without an address will be assigned one automatically when it\n"
+ "starts communicating.\n\n"
+ "The format of @var{address} and @var{args} depends\n"
+ "on the family of the socket.\n\n"
+ "For a socket of family @code{AF_UNIX}, only @var{address}\n"
+ "is specified and must be a string with the filename where\n"
+ "the socket is to be created.\n\n"
+ "For a socket of family @code{AF_INET}, @var{address}\n"
+ "must be an integer IPv4 address and @var{args}\n"
+ "must be a single integer port number.\n\n"
+ "The values of the following variables can also be used for\n"
+ "@var{address}:\n\n"
+ "@defvar INADDR_ANY\n"
+ "Allow connections from any address.\n"
+ "@end defvar\n\n"
+ "@defvar INADDR_LOOPBACK\n"
+ "The address of the local host using the loopback device.\n"
+ "@end defvar\n\n"
+ "@defvar INADDR_BROADCAST\n"
+ "The broadcast address on the local network.\n"
+ "@end defvar\n\n"
+ "@defvar INADDR_NONE\n"
+ "No address.\n"
+ "@end defvar\n\n"
+ "For a socket of family @code{AF_INET6}, @var{address}\n"
+ "must be an integer IPv6 address and @var{args}\n"
+ "may be up to three integers:\n"
+ "port [flowinfo] [scope_id],\n"
+ "where flowinfo and scope_id default to zero.\n\n"
+ "Alternatively, the second argument can be a socket address object "
+ "as returned by @code{make-socket-address}, in which case the "
+ "no additional arguments should be passed.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_bind
+{
+ struct sockaddr *soka;
+ size_t size;
+ int fd;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+
+ if (address == SCM_UNDEFINED)
+ /* No third argument was passed to FAM_OR_SOCKADDR must actually be a
+ `socket address' object. */
+ soka = scm_to_sockaddr (fam_or_sockaddr, &size);
+ else
+ soka = scm_fill_sockaddr (scm_to_int (fam_or_sockaddr), address,
+ &args, 3, FUNC_NAME, &size);
+
+
+ if (bind (fd, soka, size) == -1)
+ {
+ int save_errno = errno;
+
+ free (soka);
+ errno = save_errno;
+ SCM_SYSERROR;
+ }
+ free (soka);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_listen, "listen", 2, 0, 0,
+ (SCM sock, SCM backlog),
+ "Enable @var{sock} to accept connection\n"
+ "requests. @var{backlog} is an integer specifying\n"
+ "the maximum length of the queue for pending connections.\n"
+ "If the queue fills, new clients will fail to connect until\n"
+ "the server calls @code{accept} to accept a connection from\n"
+ "the queue.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_listen
+{
+ int fd;
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (listen (fd, scm_to_int (backlog)) == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* Put the components of a sockaddr into a new SCM vector. */
+static SCM_C_INLINE_KEYWORD SCM
+_scm_from_sockaddr (const scm_t_max_sockaddr *address, unsigned addr_size,
+ const char *proc)
+{
+ SCM result = SCM_EOL;
+ short int fam = ((struct sockaddr *) address)->sa_family;
+
+ switch (fam)
+ {
+ case AF_INET:
+ {
+ const struct sockaddr_in *nad = (struct sockaddr_in *) address;
+
+ result = scm_c_make_vector (3, SCM_UNSPECIFIED);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0,
+ scm_from_short (fam));
+ SCM_SIMPLE_VECTOR_SET(result, 1,
+ scm_from_ulong (ntohl (nad->sin_addr.s_addr)));
+ SCM_SIMPLE_VECTOR_SET(result, 2,
+ scm_from_ushort (ntohs (nad->sin_port)));
+ }
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ {
+ const struct sockaddr_in6 *nad = (struct sockaddr_in6 *) address;
+
+ result = scm_c_make_vector (5, SCM_UNSPECIFIED);
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_short (fam));
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_ipv6 (nad->sin6_addr.s6_addr));
+ SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ushort (ntohs (nad->sin6_port)));
+ SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_uint32 (nad->sin6_flowinfo));
+#ifdef HAVE_SIN6_SCOPE_ID
+ SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_ulong (nad->sin6_scope_id));
+#else
+ SCM_SIMPLE_VECTOR_SET(result, 4, SCM_INUM0);
+#endif
+ }
+ break;
+#endif
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+ case AF_UNIX:
+ {
+ const struct sockaddr_un *nad = (struct sockaddr_un *) address;
+
+ result = scm_c_make_vector (2, SCM_UNSPECIFIED);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_short (fam));
+ /* When addr_size is not enough to cover sun_path, do not try
+ to access it. */
+ if (addr_size <= offsetof (struct sockaddr_un, sun_path))
+ SCM_SIMPLE_VECTOR_SET(result, 1, SCM_BOOL_F);
+ else
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (nad->sun_path));
+ }
+ break;
+#endif
+ default:
+ result = SCM_UNSPECIFIED;
+ scm_misc_error (proc, "unrecognised address family: ~A",
+ scm_list_1 (scm_from_int (fam)));
+
+ }
+ return result;
+}
+
+/* The publicly-visible function. Return a Scheme object representing
+ ADDRESS, an address of ADDR_SIZE bytes. */
+SCM
+scm_from_sockaddr (const struct sockaddr *address, unsigned addr_size)
+{
+ return (_scm_from_sockaddr ((scm_t_max_sockaddr *) address,
+ addr_size, "scm_from_sockaddr"));
+}
+
+/* Convert ADDRESS, an address object returned by either
+ `scm_from_sockaddr ()' or `scm_make_socket_address ()', into its C
+ representation. On success, a non-NULL pointer is returned and
+ ADDRESS_SIZE is updated to the actual size (in bytes) of the returned
+ address. The result must eventually be freed using `free ()'. */
+struct sockaddr *
+scm_to_sockaddr (SCM address, size_t *address_size)
+#define FUNC_NAME "scm_to_sockaddr"
+{
+ short int family;
+ struct sockaddr *c_address = NULL;
+
+ SCM_VALIDATE_VECTOR (1, address);
+
+ *address_size = 0;
+ family = scm_to_short (SCM_SIMPLE_VECTOR_REF (address, 0));
+
+ switch (family)
+ {
+ case AF_INET:
+ {
+ if (SCM_SIMPLE_VECTOR_LENGTH (address) != 3)
+ scm_misc_error (FUNC_NAME,
+ "invalid inet address representation: ~A",
+ scm_list_1 (address));
+ else
+ {
+ struct sockaddr_in c_inet;
+
+ c_inet.sin_addr.s_addr =
+ htonl (scm_to_ulong (SCM_SIMPLE_VECTOR_REF (address, 1)));
+ c_inet.sin_port =
+ htons (scm_to_ushort (SCM_SIMPLE_VECTOR_REF (address, 2)));
+ c_inet.sin_family = AF_INET;
+
+ *address_size = sizeof (c_inet);
+ c_address = scm_malloc (sizeof (c_inet));
+ memcpy (c_address, &c_inet, sizeof (c_inet));
+ }
+
+ break;
+ }
+
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ {
+ if (SCM_SIMPLE_VECTOR_LENGTH (address) != 5)
+ scm_misc_error (FUNC_NAME, "invalid inet6 address representation: ~A",
+ scm_list_1 (address));
+ else
+ {
+ struct sockaddr_in6 c_inet6;
+
+ scm_to_ipv6 (c_inet6.sin6_addr.s6_addr,
+ SCM_SIMPLE_VECTOR_REF (address, 1));
+ c_inet6.sin6_port =
+ htons (scm_to_ushort (SCM_SIMPLE_VECTOR_REF (address, 2)));
+ c_inet6.sin6_flowinfo =
+ scm_to_uint32 (SCM_SIMPLE_VECTOR_REF (address, 3));
+#ifdef HAVE_SIN6_SCOPE_ID
+ c_inet6.sin6_scope_id =
+ scm_to_ulong (SCM_SIMPLE_VECTOR_REF (address, 4));
+#endif
+
+ c_inet6.sin6_family = AF_INET6;
+
+ *address_size = sizeof (c_inet6);
+ c_address = scm_malloc (sizeof (c_inet6));
+ memcpy (c_address, &c_inet6, sizeof (c_inet6));
+ }
+
+ break;
+ }
+#endif
+
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+ case AF_UNIX:
+ {
+ if (SCM_SIMPLE_VECTOR_LENGTH (address) != 2)
+ scm_misc_error (FUNC_NAME, "invalid unix address representation: ~A",
+ scm_list_1 (address));
+ else
+ {
+ SCM path;
+ size_t path_len = 0;
+
+ path = SCM_SIMPLE_VECTOR_REF (address, 1);
+ if ((!scm_is_string (path)) && (path != SCM_BOOL_F))
+ scm_misc_error (FUNC_NAME, "invalid unix address "
+ "path: ~A", scm_list_1 (path));
+ else
+ {
+ struct sockaddr_un c_unix;
+
+ if (path == SCM_BOOL_F)
+ path_len = 0;
+ else
+ path_len = scm_c_string_length (path);
+
+#ifdef UNIX_PATH_MAX
+ if (path_len >= UNIX_PATH_MAX)
+#else
+/* We can hope that this limit will eventually vanish, at least on GNU.
+ However, currently, while glibc doesn't define `UNIX_PATH_MAX', it
+ documents it has being limited to 108 bytes. */
+ if (path_len >= sizeof (c_unix.sun_path))
+#endif
+ scm_misc_error (FUNC_NAME, "unix address path "
+ "too long: ~A", scm_list_1 (path));
+ else
+ {
+ if (path_len)
+ {
+ scm_to_locale_stringbuf (path, c_unix.sun_path,
+#ifdef UNIX_PATH_MAX
+ UNIX_PATH_MAX);
+#else
+ sizeof (c_unix.sun_path));
+#endif
+ c_unix.sun_path[path_len] = '\0';
+
+ /* Sanity check. */
+ if (strlen (c_unix.sun_path) != path_len)
+ scm_misc_error (FUNC_NAME, "unix address path "
+ "contains nul characters: ~A",
+ scm_list_1 (path));
+ }
+ else
+ c_unix.sun_path[0] = '\0';
+
+ c_unix.sun_family = AF_UNIX;
+
+ *address_size = SUN_LEN (&c_unix);
+ c_address = scm_malloc (sizeof (c_unix));
+ memcpy (c_address, &c_unix, sizeof (c_unix));
+ }
+ }
+ }
+
+ break;
+ }
+#endif
+
+ default:
+ scm_misc_error (FUNC_NAME, "unrecognised address family: ~A",
+ scm_list_1 (scm_from_ushort (family)));
+ }
+
+ return c_address;
+}
+#undef FUNC_NAME
+
+
+/* Return a newly-allocated `sockaddr' structure that reflects ADDRESS, being
+ an address of family FAMILY, with the family-specific parameters ARGS (see
+ the description of `connect' for details). The returned structure may be
+ freed using `free ()'. */
+struct sockaddr *
+scm_c_make_socket_address (SCM family, SCM address, SCM args,
+ size_t *address_size)
+{
+ struct sockaddr *soka;
+
+ soka = scm_fill_sockaddr (scm_to_ushort (family), address, &args, 1,
+ "scm_c_make_socket_address", address_size);
+
+ return soka;
+}
+
+SCM_DEFINE (scm_make_socket_address, "make-socket-address", 2, 0, 1,
+ (SCM family, SCM address, SCM args),
+ "Return a Scheme address object that reflects @var{address}, "
+ "being an address of family @var{family}, with the "
+ "family-specific parameters @var{args} (see the description of "
+ "@code{connect} for details).")
+#define FUNC_NAME s_scm_make_socket_address
+{
+ SCM result = SCM_BOOL_F;
+ struct sockaddr *c_address;
+ size_t c_address_size;
+
+ c_address = scm_c_make_socket_address (family, address, args,
+ &c_address_size);
+ if (c_address != NULL)
+ {
+ result = scm_from_sockaddr (c_address, c_address_size);
+ free (c_address);
+ }
+
+ return result;
+}
+#undef FUNC_NAME
+
+\f
+SCM_DEFINE (scm_accept, "accept", 1, 0, 0,
+ (SCM sock),
+ "Accept a connection on a bound, listening socket.\n"
+ "If there\n"
+ "are no pending connections in the queue, wait until\n"
+ "one is available unless the non-blocking option has been\n"
+ "set on the socket.\n\n"
+ "The return value is a\n"
+ "pair in which the @emph{car} is a new socket port for the\n"
+ "connection and\n"
+ "the @emph{cdr} is an object with address information about the\n"
+ "client which initiated the connection.\n\n"
+ "@var{sock} does not become part of the\n"
+ "connection and will continue to accept new requests.")
+#define FUNC_NAME s_scm_accept
+{
+ int fd, selected;
+ int newfd;
+ SCM address;
+ SCM newsock;
+ SELECT_TYPE readfds, exceptfds;
+ socklen_t addr_size = MAX_ADDR_SIZE;
+ scm_t_max_sockaddr addr;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+
+ FD_ZERO (&readfds);
+ FD_ZERO (&exceptfds);
+ FD_SET (fd, &readfds);
+ FD_SET (fd, &exceptfds);
+
+ /* Block until something happens on FD, leaving guile mode while
+ waiting. */
+ selected = scm_std_select (fd + 1, &readfds, NULL, &exceptfds,
+ NULL);
+ if (selected < 0)
+ SCM_SYSERROR;
+
+ newfd = accept (fd, (struct sockaddr *) &addr, &addr_size);
+ if (newfd == -1)
+ SCM_SYSERROR;
+ newsock = SCM_SOCK_FD_TO_PORT (newfd);
+ address = _scm_from_sockaddr (&addr, addr_size,
+ FUNC_NAME);
+
+ return scm_cons (newsock, address);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_getsockname, "getsockname", 1, 0, 0,
+ (SCM sock),
+ "Return the address of @var{sock}, in the same form as the\n"
+ "object returned by @code{accept}. On many systems the address\n"
+ "of a socket in the @code{AF_FILE} namespace cannot be read.")
+#define FUNC_NAME s_scm_getsockname
+{
+ int fd;
+ socklen_t addr_size = MAX_ADDR_SIZE;
+ scm_t_max_sockaddr addr;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (getsockname (fd, (struct sockaddr *) &addr, &addr_size) == -1)
+ SCM_SYSERROR;
+
+ return _scm_from_sockaddr (&addr, addr_size, FUNC_NAME);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_getpeername, "getpeername", 1, 0, 0,
+ (SCM sock),
+ "Return the address that @var{sock}\n"
+ "is connected to, in the same form as the object returned by\n"
+ "@code{accept}. On many systems the address of a socket in the\n"
+ "@code{AF_FILE} namespace cannot be read.")
+#define FUNC_NAME s_scm_getpeername
+{
+ int fd;
+ socklen_t addr_size = MAX_ADDR_SIZE;
+ scm_t_max_sockaddr addr;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (getpeername (fd, (struct sockaddr *) &addr, &addr_size) == -1)
+ SCM_SYSERROR;
+
+ return _scm_from_sockaddr (&addr, addr_size, FUNC_NAME);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_recv, "recv!", 2, 1, 0,
+ (SCM sock, SCM buf, SCM flags),
+ "Receive data from a socket port.\n"
+ "@var{sock} must already\n"
+ "be bound to the address from which data is to be received.\n"
+ "@var{buf} is a string into which\n"
+ "the data will be written. The size of @var{buf} limits\n"
+ "the amount of\n"
+ "data which can be received: in the case of packet\n"
+ "protocols, if a packet larger than this limit is encountered\n"
+ "then some data\n"
+ "will be irrevocably lost.\n\n"
+ "The optional @var{flags} argument is a value or\n"
+ "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
+ "The value returned is the number of bytes read from the\n"
+ "socket.\n\n"
+ "Note that the data is read directly from the socket file\n"
+ "descriptor:\n"
+ "any unread buffered port data is ignored.")
+#define FUNC_NAME s_scm_recv
+{
+ int rv;
+ int fd;
+ int flg;
+ char *dest;
+ size_t len;
+
+ SCM_VALIDATE_OPFPORT (1, sock);
+ SCM_VALIDATE_STRING (2, buf);
+ if (SCM_UNBNDP (flags))
+ flg = 0;
+ else
+ flg = scm_to_int (flags);
+ fd = SCM_FPORT_FDES (sock);
+
+ len = scm_i_string_length (buf);
+ dest = scm_i_string_writable_chars (buf);
+ SCM_SYSCALL (rv = recv (fd, dest, len, flg));
+ scm_i_string_stop_writing ();
+
+ if (rv == -1)
+ SCM_SYSERROR;
+
+ scm_remember_upto_here_1 (buf);
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_send, "send", 2, 1, 0,
+ (SCM sock, SCM message, SCM flags),
+ "Transmit the string @var{message} on a socket port @var{sock}.\n"
+ "@var{sock} must already be bound to a destination address. The\n"
+ "value returned is the number of bytes transmitted --\n"
+ "it's possible for\n"
+ "this to be less than the length of @var{message}\n"
+ "if the socket is\n"
+ "set to be non-blocking. The optional @var{flags} argument\n"
+ "is a value or\n"
+ "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
+ "Note that the data is written directly to the socket\n"
+ "file descriptor:\n"
+ "any unflushed buffered port data is ignored.")
+#define FUNC_NAME s_scm_send
+{
+ int rv;
+ int fd;
+ int flg;
+ const char *src;
+ size_t len;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ SCM_VALIDATE_STRING (2, message);
+ if (SCM_UNBNDP (flags))
+ flg = 0;
+ else
+ flg = scm_to_int (flags);
+ fd = SCM_FPORT_FDES (sock);
+
+ len = scm_i_string_length (message);
+ src = scm_i_string_writable_chars (message);
+ SCM_SYSCALL (rv = send (fd, src, len, flg));
+ scm_i_string_stop_writing ();
+
+ if (rv == -1)
+ SCM_SYSERROR;
+
+ scm_remember_upto_here_1 (message);
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_recvfrom, "recvfrom!", 2, 3, 0,
+ (SCM sock, SCM str, SCM flags, SCM start, SCM end),
+ "Receive data from socket port @var{sock} (which must be already\n"
+ "bound), returning the originating address as well as the data.\n"
+ "This is usually for use on datagram sockets, but can be used on\n"
+ "stream-oriented sockets too.\n"
+ "\n"
+ "The data received is stored in the given @var{str}, using\n"
+ "either the whole string or just the region between the optional\n"
+ "@var{start} and @var{end} positions. The size of @var{str}\n"
+ "limits the amount of data which can be received. For datagram\n"
+ "protocols, if a packet larger than this is received then excess\n"
+ "bytes are irrevocably lost.\n"
+ "\n"
+ "The return value is a pair. The @code{car} is the number of\n"
+ "bytes read. The @code{cdr} is a socket address object which is\n"
+ "where the data come from, or @code{#f} if the origin is\n"
+ "unknown.\n"
+ "\n"
+ "The optional @var{flags} argument is a or bitwise OR\n"
+ "(@code{logior}) of @code{MSG_OOB}, @code{MSG_PEEK},\n"
+ "@code{MSG_DONTROUTE} etc.\n"
+ "\n"
+ "Data is read directly from the socket file descriptor, any\n"
+ "buffered port data is ignored.\n"
+ "\n"
+ "On a GNU/Linux system @code{recvfrom!} is not multi-threading,\n"
+ "all threads stop while a @code{recvfrom!} call is in progress.\n"
+ "An application may need to use @code{select}, @code{O_NONBLOCK}\n"
+ "or @code{MSG_DONTWAIT} to avoid this.")
+#define FUNC_NAME s_scm_recvfrom
+{
+ int rv;
+ int fd;
+ int flg;
+ char *buf;
+ size_t offset;
+ size_t cend;
+ SCM address;
+ socklen_t addr_size = MAX_ADDR_SIZE;
+ scm_t_max_sockaddr addr;
+
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+
+ SCM_VALIDATE_STRING (2, str);
+ scm_i_get_substring_spec (scm_i_string_length (str),
+ start, &offset, end, &cend);
+
+ if (SCM_UNBNDP (flags))
+ flg = 0;
+ else
+ SCM_VALIDATE_ULONG_COPY (3, flags, flg);
+
+ /* recvfrom will not necessarily return an address. usually nothing
+ is returned for stream sockets. */
+ buf = scm_i_string_writable_chars (str);
+ ((struct sockaddr *) &addr)->sa_family = AF_UNSPEC;
+ SCM_SYSCALL (rv = recvfrom (fd, buf + offset,
+ cend - offset, flg,
+ (struct sockaddr *) &addr, &addr_size));
+ scm_i_string_stop_writing ();
+
+ if (rv == -1)
+ SCM_SYSERROR;
+ if (((struct sockaddr *) &addr)->sa_family != AF_UNSPEC)
+ address = _scm_from_sockaddr (&addr, addr_size, FUNC_NAME);
+ else
+ address = SCM_BOOL_F;
+
+ scm_remember_upto_here_1 (str);
+
+ return scm_cons (scm_from_int (rv), address);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_sendto, "sendto", 3, 1, 1,
+ (SCM sock, SCM message, SCM fam_or_sockaddr, SCM address, SCM args_and_flags),
+ "Transmit the string @var{message} on the socket port\n"
+ "@var{sock}. The\n"
+ "destination address is specified using the @var{fam},\n"
+ "@var{address} and\n"
+ "@var{args_and_flags} arguments, or just a socket address object "
+ "returned by @code{make-socket-address}, in a similar way to the\n"
+ "@code{connect} procedure. @var{args_and_flags} contains\n"
+ "the usual connection arguments optionally followed by\n"
+ "a flags argument, which is a value or\n"
+ "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
+ "The value returned is the number of bytes transmitted --\n"
+ "it's possible for\n"
+ "this to be less than the length of @var{message} if the\n"
+ "socket is\n"
+ "set to be non-blocking.\n"
+ "Note that the data is written directly to the socket\n"
+ "file descriptor:\n"
+ "any unflushed buffered port data is ignored.")
+#define FUNC_NAME s_scm_sendto
+{
+ int rv;
+ int fd;
+ int flg;
+ struct sockaddr *soka;
+ size_t size;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_FPORT (1, sock);
+ SCM_VALIDATE_STRING (2, message);
+ fd = SCM_FPORT_FDES (sock);
+
+ if (!scm_is_number (fam_or_sockaddr))
+ {
+ /* FAM_OR_SOCKADDR must actually be a `socket address' object. This
+ means that the following arguments, i.e. ADDRESS and those listed in
+ ARGS_AND_FLAGS, are the `MSG_' flags. */
+ soka = scm_to_sockaddr (fam_or_sockaddr, &size);
+ if (address != SCM_UNDEFINED)
+ args_and_flags = scm_cons (address, args_and_flags);
+ }
+ else
+ soka = scm_fill_sockaddr (scm_to_int (fam_or_sockaddr), address,
+ &args_and_flags, 3, FUNC_NAME, &size);
+
+ if (scm_is_null (args_and_flags))
+ flg = 0;
+ else
+ {
+ SCM_VALIDATE_CONS (5, args_and_flags);
+ flg = SCM_NUM2ULONG (5, SCM_CAR (args_and_flags));
+ }
+ SCM_SYSCALL (rv = sendto (fd,
+ scm_i_string_chars (message),
+ scm_i_string_length (message),
+ flg, soka, size));
+ if (rv == -1)
+ {
+ int save_errno = errno;
+ free (soka);
+ errno = save_errno;
+ SCM_SYSERROR;
+ }
+ free (soka);
+
+ scm_remember_upto_here_1 (message);
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+\f
+
+
+void
+scm_init_socket ()
+{
+ /* protocol families. */
+#ifdef AF_UNSPEC
+ scm_c_define ("AF_UNSPEC", scm_from_int (AF_UNSPEC));
+#endif
+#ifdef AF_UNIX
+ scm_c_define ("AF_UNIX", scm_from_int (AF_UNIX));
+#endif
+#ifdef AF_INET
+ scm_c_define ("AF_INET", scm_from_int (AF_INET));
+#endif
+#ifdef AF_INET6
+ scm_c_define ("AF_INET6", scm_from_int (AF_INET6));
+#endif
+
+#ifdef PF_UNSPEC
+ scm_c_define ("PF_UNSPEC", scm_from_int (PF_UNSPEC));
+#endif
+#ifdef PF_UNIX
+ scm_c_define ("PF_UNIX", scm_from_int (PF_UNIX));
+#endif
+#ifdef PF_INET
+ scm_c_define ("PF_INET", scm_from_int (PF_INET));
+#endif
+#ifdef PF_INET6
+ scm_c_define ("PF_INET6", scm_from_int (PF_INET6));
+#endif
+
+ /* standard addresses. */
+#ifdef INADDR_ANY
+ scm_c_define ("INADDR_ANY", scm_from_ulong (INADDR_ANY));
+#endif
+#ifdef INADDR_BROADCAST
+ scm_c_define ("INADDR_BROADCAST", scm_from_ulong (INADDR_BROADCAST));
+#endif
+#ifdef INADDR_NONE
+ scm_c_define ("INADDR_NONE", scm_from_ulong (INADDR_NONE));
+#endif
+#ifdef INADDR_LOOPBACK
+ scm_c_define ("INADDR_LOOPBACK", scm_from_ulong (INADDR_LOOPBACK));
+#endif
+
+ /* socket types.
+
+ SOCK_PACKET is deliberately omitted, the GNU/Linux socket(2) and
+ packet(7) advise that it's obsolete and strongly deprecated. */
+
+#ifdef SOCK_STREAM
+ scm_c_define ("SOCK_STREAM", scm_from_int (SOCK_STREAM));
+#endif
+#ifdef SOCK_DGRAM
+ scm_c_define ("SOCK_DGRAM", scm_from_int (SOCK_DGRAM));
+#endif
+#ifdef SOCK_SEQPACKET
+ scm_c_define ("SOCK_SEQPACKET", scm_from_int (SOCK_SEQPACKET));
+#endif
+#ifdef SOCK_RAW
+ scm_c_define ("SOCK_RAW", scm_from_int (SOCK_RAW));
+#endif
+#ifdef SOCK_RDM
+ scm_c_define ("SOCK_RDM", scm_from_int (SOCK_RDM));
+#endif
+
+ /* setsockopt level.
+
+ SOL_IP, SOL_TCP and SOL_UDP are defined on gnu/linux, but not on for
+ instance NetBSD. We define IPPROTOs because that's what the posix spec
+ shows in its example at
+
+ http://www.opengroup.org/onlinepubs/007904975/functions/getsockopt.html
+ */
+#ifdef SOL_SOCKET
+ scm_c_define ("SOL_SOCKET", scm_from_int (SOL_SOCKET));
+#endif
+#ifdef IPPROTO_IP
+ scm_c_define ("IPPROTO_IP", scm_from_int (IPPROTO_IP));
+#endif
+#ifdef IPPROTO_TCP
+ scm_c_define ("IPPROTO_TCP", scm_from_int (IPPROTO_TCP));
+#endif
+#ifdef IPPROTO_UDP
+ scm_c_define ("IPPROTO_UDP", scm_from_int (IPPROTO_UDP));
+#endif
+
+ /* setsockopt names. */
+#ifdef SO_DEBUG
+ scm_c_define ("SO_DEBUG", scm_from_int (SO_DEBUG));
+#endif
+#ifdef SO_REUSEADDR
+ scm_c_define ("SO_REUSEADDR", scm_from_int (SO_REUSEADDR));
+#endif
+#ifdef SO_STYLE
+ scm_c_define ("SO_STYLE", scm_from_int (SO_STYLE));
+#endif
+#ifdef SO_TYPE
+ scm_c_define ("SO_TYPE", scm_from_int (SO_TYPE));
+#endif
+#ifdef SO_ERROR
+ scm_c_define ("SO_ERROR", scm_from_int (SO_ERROR));
+#endif
+#ifdef SO_DONTROUTE
+ scm_c_define ("SO_DONTROUTE", scm_from_int (SO_DONTROUTE));
+#endif
+#ifdef SO_BROADCAST
+ scm_c_define ("SO_BROADCAST", scm_from_int (SO_BROADCAST));
+#endif
+#ifdef SO_SNDBUF
+ scm_c_define ("SO_SNDBUF", scm_from_int (SO_SNDBUF));
+#endif
+#ifdef SO_RCVBUF
+ scm_c_define ("SO_RCVBUF", scm_from_int (SO_RCVBUF));
+#endif
+#ifdef SO_KEEPALIVE
+ scm_c_define ("SO_KEEPALIVE", scm_from_int (SO_KEEPALIVE));
+#endif
+#ifdef SO_OOBINLINE
+ scm_c_define ("SO_OOBINLINE", scm_from_int (SO_OOBINLINE));
+#endif
+#ifdef SO_NO_CHECK
+ scm_c_define ("SO_NO_CHECK", scm_from_int (SO_NO_CHECK));
+#endif
+#ifdef SO_PRIORITY
+ scm_c_define ("SO_PRIORITY", scm_from_int (SO_PRIORITY));
+#endif
+#ifdef SO_LINGER
+ scm_c_define ("SO_LINGER", scm_from_int (SO_LINGER));
+#endif
+
+ /* recv/send options. */
+#ifdef MSG_DONTWAIT
+ scm_c_define ("MSG_DONTWAIT", scm_from_int (MSG_DONTWAIT));
+#endif
+#ifdef MSG_OOB
+ scm_c_define ("MSG_OOB", scm_from_int (MSG_OOB));
+#endif
+#ifdef MSG_PEEK
+ scm_c_define ("MSG_PEEK", scm_from_int (MSG_PEEK));
+#endif
+#ifdef MSG_DONTROUTE
+ scm_c_define ("MSG_DONTROUTE", scm_from_int (MSG_DONTROUTE));
+#endif
+
+#ifdef __MINGW32__
+ scm_i_init_socket_Win32 ();
+#endif
+
+#ifdef IP_ADD_MEMBERSHIP
+ scm_c_define ("IP_ADD_MEMBERSHIP", scm_from_int (IP_ADD_MEMBERSHIP));
+ scm_c_define ("IP_DROP_MEMBERSHIP", scm_from_int (IP_DROP_MEMBERSHIP));
+#endif
+
+ scm_add_feature ("socket");
+
+#include "libguile/socket.x"
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
projects / lilypond.git / blobdiff