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-rw-r--r--gcc-4.8.3/gcc/ada/socket.c694
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diff --git a/gcc-4.8.3/gcc/ada/socket.c b/gcc-4.8.3/gcc/ada/socket.c
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+/****************************************************************************
+ * *
+ * GNAT COMPILER COMPONENTS *
+ * *
+ * S O C K E T *
+ * *
+ * C Implementation File *
+ * *
+ * Copyright (C) 2003-2012, Free Software Foundation, Inc. *
+ * *
+ * GNAT is free software; you can redistribute it and/or modify it under *
+ * terms of the GNU General Public License as published by the Free Soft- *
+ * ware Foundation; either version 3, or (at your option) any later ver- *
+ * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE. *
+ * *
+ * As a special exception under Section 7 of GPL version 3, you are granted *
+ * additional permissions described in the GCC Runtime Library Exception, *
+ * version 3.1, as published by the Free Software Foundation. *
+ * *
+ * You should have received a copy of the GNU General Public License and *
+ * a copy of the GCC Runtime Library Exception along with this program; *
+ * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ * *
+ * GNAT was originally developed by the GNAT team at New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc. *
+ * *
+ ****************************************************************************/
+
+/* This file provides a portable binding to the sockets API */
+
+#include "gsocket.h"
+
+#if defined(VMS)
+/*
+ * For VMS, gsocket.h can't include sockets-related DEC C header files
+ * when building the runtime (because these files are in a DEC C text library
+ * (DECC$RTLDEF.TLB) not accessible to GCC). So, we generate a separate header
+ * file along with s-oscons.ads and include it here.
+ */
+# include "s-oscons.h"
+
+/*
+ * We also need the declaration of struct hostent/servent, which s-oscons
+ * can't provide, so we copy it manually here. This needs to be kept in synch
+ * with the definition of that structure in the DEC C headers, which
+ * hopefully won't change frequently.
+ */
+typedef char *__netdb_char_ptr __attribute__ (( mode (SI) ));
+typedef __netdb_char_ptr *__netdb_char_ptr_ptr __attribute__ (( mode (SI) ));
+
+struct hostent {
+ __netdb_char_ptr h_name;
+ __netdb_char_ptr_ptr h_aliases;
+ int h_addrtype;
+ int h_length;
+ __netdb_char_ptr_ptr h_addr_list;
+};
+
+struct servent {
+ __netdb_char_ptr s_name;
+ __netdb_char_ptr_ptr s_aliases;
+ int s_port;
+ __netdb_char_ptr s_proto;
+};
+#elif defined(__FreeBSD__)
+typedef unsigned int IOCTL_Req_T;
+#else
+typedef int IOCTL_Req_T;
+#endif
+
+#if defined(HAVE_SOCKETS)
+
+/* Include all the necessary system-specific headers and define the
+ * necessary macros (shared with gen-oscons).
+ */
+
+#if !defined(SO_NOSIGPIPE) && !defined (MSG_NOSIGNAL)
+#include <signal.h>
+#endif
+/* Required if we will be calling signal() in __gnat_disable_all_sigpipes() */
+
+#include "raise.h"
+/* Required for __gnat_malloc() */
+
+#include <string.h>
+/* Required for memcpy() */
+
+extern void __gnat_disable_sigpipe (int fd);
+extern void __gnat_disable_all_sigpipes (void);
+extern int __gnat_create_signalling_fds (int *fds);
+extern int __gnat_read_signalling_fd (int rsig);
+extern int __gnat_write_signalling_fd (int wsig);
+extern void __gnat_close_signalling_fd (int sig);
+extern void __gnat_last_socket_in_set (fd_set *, int *);
+extern void __gnat_get_socket_from_set (fd_set *, int *, int *);
+extern void __gnat_insert_socket_in_set (fd_set *, int);
+extern int __gnat_is_socket_in_set (fd_set *, int);
+extern fd_set *__gnat_new_socket_set (fd_set *);
+extern void __gnat_remove_socket_from_set (fd_set *, int);
+extern void __gnat_reset_socket_set (fd_set *);
+extern int __gnat_get_h_errno (void);
+extern int __gnat_socket_ioctl (int, IOCTL_Req_T, int *);
+
+extern char * __gnat_servent_s_name (struct servent *);
+extern char * __gnat_servent_s_alias (struct servent *, int index);
+extern unsigned short __gnat_servent_s_port (struct servent *);
+extern char * __gnat_servent_s_proto (struct servent *);
+
+extern char * __gnat_hostent_h_name (struct hostent *);
+extern char * __gnat_hostent_h_alias (struct hostent *, int);
+extern int __gnat_hostent_h_addrtype (struct hostent *);
+extern int __gnat_hostent_h_length (struct hostent *);
+extern char * __gnat_hostent_h_addr (struct hostent *, int);
+
+#ifndef HAVE_INET_PTON
+extern int __gnat_inet_pton (int, const char *, void *);
+#endif
+
+/* Disable the sending of SIGPIPE for writes on a broken stream */
+
+void
+__gnat_disable_sigpipe (int fd)
+{
+#ifdef SO_NOSIGPIPE
+ int val = 1;
+ (void) setsockopt (fd, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof val);
+#endif
+}
+
+void
+__gnat_disable_all_sigpipes (void)
+{
+#if !defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL) && defined(SIGPIPE)
+ (void) signal (SIGPIPE, SIG_IGN);
+#endif
+}
+
+#if defined (_WIN32) || defined (__vxworks) || defined (VMS)
+/*
+ * Signalling FDs operations are implemented in Ada for these platforms
+ * (see subunit GNAT.Sockets.Thin.Signalling_Fds).
+ */
+#else
+/*
+ * Create a pair of connected file descriptors fds[0] and fds[1] used for
+ * signalling by a Selector object. fds[0] is the read end, and fds[1] the
+ * write end.
+ */
+int
+__gnat_create_signalling_fds (int *fds) {
+ return pipe (fds);
+}
+
+/*
+ * Read one byte of data from rsig, the read end of a pair of signalling fds
+ * created by __gnat_create_signalling_fds.
+ */
+int
+__gnat_read_signalling_fd (int rsig) {
+ char c;
+ return read (rsig, &c, 1);
+}
+
+/*
+ * Write one byte of data to wsig, the write end of a pair of signalling fds
+ * created by __gnat_create_signalling_fds.
+ */
+int
+__gnat_write_signalling_fd (int wsig) {
+ char c = 0;
+ return write (wsig, &c, 1);
+}
+
+/*
+ * Close one end of a pair of signalling fds
+ */
+void
+__gnat_close_signalling_fd (int sig) {
+ (void) close (sig);
+}
+#endif
+
+/*
+ * Handling of gethostbyname, gethostbyaddr, getservbyname and getservbyport
+ * =========================================================================
+ *
+ * This module exposes __gnat_getXXXbyYYY operations with the same signature
+ * as the reentrant variant getXXXbyYYY_r.
+ *
+ * On platforms where getXXXbyYYY is intrinsically reentrant, the provided user
+ * buffer argument is ignored.
+ *
+ * When getXXXbyYYY is not reentrant but getXXXbyYYY_r exists, the latter is
+ * used, and the provided buffer argument must point to a valid, thread-local
+ * buffer (usually on the caller's stack).
+ *
+ * When getXXXbyYYY is not reentrant and no reentrant getXXXbyYYY_r variant
+ * is available, the non-reentrant getXXXbyYYY is called, the provided user
+ * buffer is ignored, and the caller is expected to take care of mutual
+ * exclusion.
+ */
+
+#ifdef HAVE_GETxxxBYyyy_R
+int
+__gnat_gethostbyname (const char *name,
+ struct hostent *ret, char *buf, size_t buflen,
+ int *h_errnop)
+{
+ struct hostent *rh;
+ int ri;
+
+#if defined(__linux__) || defined(__GLIBC__)
+ (void) gethostbyname_r (name, ret, buf, buflen, &rh, h_errnop);
+#else
+ rh = gethostbyname_r (name, ret, buf, buflen, h_errnop);
+#endif
+ ri = (rh == NULL) ? -1 : 0;
+ return ri;
+}
+
+int
+__gnat_gethostbyaddr (const char *addr, int len, int type,
+ struct hostent *ret, char *buf, size_t buflen,
+ int *h_errnop)
+{
+ struct hostent *rh;
+ int ri;
+
+#if defined(__linux__) || defined(__GLIBC__)
+ (void) gethostbyaddr_r (addr, len, type, ret, buf, buflen, &rh, h_errnop);
+#else
+ rh = gethostbyaddr_r (addr, len, type, ret, buf, buflen, h_errnop);
+#endif
+ ri = (rh == NULL) ? -1 : 0;
+ return ri;
+}
+
+int
+__gnat_getservbyname (const char *name, const char *proto,
+ struct servent *ret, char *buf, size_t buflen)
+{
+ struct servent *rh;
+ int ri;
+
+#if defined(__linux__) || defined(__GLIBC__) || defined(__rtems__)
+ (void) getservbyname_r (name, proto, ret, buf, buflen, &rh);
+#else
+ rh = getservbyname_r (name, proto, ret, buf, buflen);
+#endif
+ ri = (rh == NULL) ? -1 : 0;
+ return ri;
+}
+
+int
+__gnat_getservbyport (int port, const char *proto,
+ struct servent *ret, char *buf, size_t buflen)
+{
+ struct servent *rh;
+ int ri;
+
+#if defined(__linux__) || defined(__GLIBC__) || defined(__rtems__)
+ (void) getservbyport_r (port, proto, ret, buf, buflen, &rh);
+#else
+ rh = getservbyport_r (port, proto, ret, buf, buflen);
+#endif
+ ri = (rh == NULL) ? -1 : 0;
+ return ri;
+}
+#elif defined (__vxworks)
+static char vxw_h_name[MAXHOSTNAMELEN + 1];
+static char *vxw_h_aliases[1] = { NULL };
+static int vxw_h_addr;
+static char *vxw_h_addr_list[2] = { (char*) &vxw_h_addr, NULL };
+
+int
+__gnat_gethostbyname (const char *name,
+ struct hostent *ret, char *buf, size_t buflen,
+ int *h_errnop)
+{
+ vxw_h_addr = hostGetByName (name);
+ if (vxw_h_addr == ERROR) {
+ *h_errnop = __gnat_get_h_errno ();
+ return -1;
+ }
+ ret->h_name = name;
+ ret->h_aliases = &vxw_h_aliases;
+ ret->h_addrtype = AF_INET;
+ ret->h_length = 4;
+ ret->h_addr_list = &vxw_h_addr_list;
+ return 0;
+}
+
+int
+__gnat_gethostbyaddr (const char *addr, int len, int type,
+ struct hostent *ret, char *buf, size_t buflen,
+ int *h_errnop)
+{
+ if (type != AF_INET) {
+ *h_errnop = EAFNOSUPPORT;
+ return -1;
+ }
+
+ if (addr == NULL || len != 4) {
+ *h_errnop = EINVAL;
+ return -1;
+ }
+
+ if (hostGetByAddr (*(int*)addr, &vxw_h_name) != OK) {
+ *h_errnop = __gnat_get_h_errno ();
+ return -1;
+ }
+
+ vxw_h_addr = addr;
+
+ ret->h_name = &vxw_h_name;
+ ret->h_aliases = &vxw_h_aliases;
+ ret->h_addrtype = AF_INET;
+ ret->h_length = 4;
+ ret->h_addr_list = &vxw_h_addr_list;
+}
+
+int
+__gnat_getservbyname (const char *name, const char *proto,
+ struct servent *ret, char *buf, size_t buflen)
+{
+ /* Not available under VxWorks */
+ return -1;
+}
+
+int
+__gnat_getservbyport (int port, const char *proto,
+ struct servent *ret, char *buf, size_t buflen)
+{
+ /* Not available under VxWorks */
+ return -1;
+}
+#else
+int
+__gnat_gethostbyname (const char *name,
+ struct hostent *ret, char *buf, size_t buflen,
+ int *h_errnop)
+{
+ struct hostent *rh;
+ rh = gethostbyname (name);
+ if (rh == NULL) {
+ *h_errnop = __gnat_get_h_errno ();
+ return -1;
+ }
+ *ret = *rh;
+ *h_errnop = 0;
+ return 0;
+}
+
+int
+__gnat_gethostbyaddr (const char *addr, int len, int type,
+ struct hostent *ret, char *buf, size_t buflen,
+ int *h_errnop)
+{
+ struct hostent *rh;
+ rh = gethostbyaddr (addr, len, type);
+ if (rh == NULL) {
+ *h_errnop = __gnat_get_h_errno ();
+ return -1;
+ }
+ *ret = *rh;
+ *h_errnop = 0;
+ return 0;
+}
+
+int
+__gnat_getservbyname (const char *name, const char *proto,
+ struct servent *ret, char *buf, size_t buflen)
+{
+ struct servent *rh;
+ rh = getservbyname (name, proto);
+ if (rh == NULL)
+ return -1;
+ *ret = *rh;
+ return 0;
+}
+
+int
+__gnat_getservbyport (int port, const char *proto,
+ struct servent *ret, char *buf, size_t buflen)
+{
+ struct servent *rh;
+ rh = getservbyport (port, proto);
+ if (rh == NULL)
+ return -1;
+ *ret = *rh;
+ return 0;
+}
+#endif
+
+/* Find the largest socket in the socket set SET. This is needed for
+ `select'. LAST is the maximum value for the largest socket. This hint is
+ used to avoid scanning very large socket sets. On return, LAST is the
+ actual largest socket in the socket set. */
+
+void
+__gnat_last_socket_in_set (fd_set *set, int *last)
+{
+ int s;
+ int l;
+ l = -1;
+
+#ifdef _WIN32
+ /* More efficient method for NT. */
+ for (s = 0; s < set->fd_count; s++)
+ if ((int) set->fd_array[s] > l)
+ l = set->fd_array[s];
+
+#else
+
+ for (s = *last; s != -1; s--)
+ if (FD_ISSET (s, set))
+ {
+ l = s;
+ break;
+ }
+#endif
+
+ *last = l;
+}
+
+/* Get last socket and remove it from the socket set SET. LAST is the
+ maximum value of the largest socket. This hint is used to avoid scanning
+ very large socket sets. On return, LAST is set to the actual largest
+ socket in the socket set. */
+
+void
+__gnat_get_socket_from_set (fd_set *set, int *last, int *socket)
+{
+ *socket = *last;
+ FD_CLR (*socket, set);
+ __gnat_last_socket_in_set (set, last);
+}
+
+/* Insert SOCKET in the socket set SET. */
+
+void
+__gnat_insert_socket_in_set (fd_set *set, int socket)
+{
+ FD_SET (socket, set);
+}
+
+/* Check whether a given SOCKET is in the socket set SET. */
+
+int
+__gnat_is_socket_in_set (fd_set *set, int socket)
+{
+ return FD_ISSET (socket, set);
+}
+
+/* Remove SOCKET from the socket set SET. */
+
+void
+__gnat_remove_socket_from_set (fd_set *set, int socket)
+{
+ FD_CLR (socket, set);
+}
+
+/* Reset SET */
+void
+__gnat_reset_socket_set (fd_set *set)
+{
+ FD_ZERO (set);
+}
+
+/* Get the value of the last host error */
+
+int
+__gnat_get_h_errno (void) {
+#ifdef __vxworks
+ int vxw_errno = errno;
+
+ switch (vxw_errno) {
+ case 0:
+ return 0;
+
+#ifdef S_hostLib_HOST_NOT_FOUND
+ case S_hostLib_HOST_NOT_FOUND:
+#endif
+ case S_hostLib_UNKNOWN_HOST:
+ return HOST_NOT_FOUND;
+
+#ifdef S_hostLib_TRY_AGAIN
+ case S_hostLib_TRY_AGAIN:
+ return TRY_AGAIN;
+#endif
+
+#ifdef S_hostLib_NO_RECOVERY
+ case S_hostLib_NO_RECOVERY:
+#endif
+#ifdef S_hostLib_NETDB_INTERNAL
+ case S_hostLib_NETDB_INTERNAL:
+#endif
+ case S_hostLib_INVALID_PARAMETER:
+ return NO_RECOVERY;
+
+ default:
+ return -1;
+ }
+
+#elif defined (VMS)
+ /* h_errno is defined as follows in OpenVMS' version of <netdb.h>.
+ * However this header file is not available when building the GNAT
+ * runtime library using GCC, so we are hardcoding the definition
+ * directly. Note that the returned address is thread-specific.
+ */
+ extern int *decc$h_errno_get_addr ();
+ return *decc$h_errno_get_addr ();
+
+#elif defined (__rtems__)
+ /* At this stage in the tool build, no networking .h files are available.
+ * Newlib does not provide networking .h files and RTEMS is not built yet.
+ * So we need to explicitly extern h_errno to access it.
+ */
+ extern int h_errno;
+ return h_errno;
+
+#else
+ return h_errno;
+#endif
+}
+
+/* Wrapper for ioctl(2), which is a variadic function */
+
+int
+__gnat_socket_ioctl (int fd, IOCTL_Req_T req, int *arg) {
+#if defined (_WIN32)
+ return ioctlsocket (fd, req, arg);
+#elif defined (__APPLE__)
+ /*
+ * On Darwin, req is an unsigned long, and we want to convert without sign
+ * extension to get the proper bit pattern in the case of a 64 bit kernel.
+ */
+ return ioctl (fd, (unsigned int) req, arg);
+#else
+ return ioctl (fd, req, arg);
+#endif
+}
+
+#ifndef HAVE_INET_PTON
+
+#ifdef VMS
+# define in_addr_t int
+# define inet_addr decc$inet_addr
+#endif
+
+int
+__gnat_inet_pton (int af, const char *src, void *dst) {
+ switch (af) {
+#if defined (_WIN32) && defined (AF_INET6)
+ case AF_INET6:
+#endif
+ case AF_INET:
+ break;
+ default:
+ errno = EAFNOSUPPORT;
+ return -1;
+ }
+
+#if defined (__vxworks)
+ return (inet_aton (src, dst) == OK);
+
+#elif defined (_WIN32)
+ struct sockaddr_storage ss;
+ int sslen = sizeof ss;
+ int rc;
+
+ ss.ss_family = af;
+ rc = WSAStringToAddressA (src, af, NULL, (struct sockaddr *)&ss, &sslen);
+ if (rc == 0) {
+ switch (af) {
+ case AF_INET:
+ *(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr;
+ break;
+#ifdef AF_INET6
+ case AF_INET6:
+ *(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr;
+ break;
+#endif
+ }
+ }
+ return (rc == 0);
+
+#elif defined (__hpux__) || defined (VMS)
+ in_addr_t addr;
+ int rc = -1;
+
+ if (src == NULL || dst == NULL) {
+ errno = EINVAL;
+
+ } else if (!strcmp (src, "255.255.255.255")) {
+ addr = 0xffffffff;
+ rc = 1;
+
+ } else {
+ addr = inet_addr (src);
+ rc = (addr != 0xffffffff);
+ }
+ if (rc == 1) {
+ *(in_addr_t *)dst = addr;
+ }
+ return rc;
+#endif
+}
+#endif
+
+/*
+ * Accessor functions for struct hostent.
+ */
+
+char * __gnat_hostent_h_name (struct hostent * h) {
+ return h->h_name;
+}
+
+char * __gnat_hostent_h_alias (struct hostent * h, int index) {
+ return h->h_aliases[index];
+}
+
+int __gnat_hostent_h_addrtype (struct hostent * h) {
+ return h->h_addrtype;
+}
+
+int __gnat_hostent_h_length (struct hostent * h) {
+ return h->h_length;
+}
+
+char * __gnat_hostent_h_addr (struct hostent * h, int index) {
+ return h->h_addr_list[index];
+}
+
+/*
+ * Accessor functions for struct servent.
+ *
+ * These are needed because servent has different representations on different
+ * platforms, and we don't want to deal with that on the Ada side. For example,
+ * on Linux, we have (see /usr/include netdb.h):
+ *
+ * struct servent
+ * {
+ * char *s_name;
+ * char **s_aliases;
+ * int s_port;
+ * char *s_proto;
+ * };
+ *
+ * and on Windows (see mingw's socket.h):
+ *
+ * struct servent {
+ * char *s_name;
+ * char **s_aliases;
+ * #ifdef _WIN64
+ * char *s_proto;
+ * short s_port;
+ * #else
+ * short s_port;
+ * char *s_proto;
+ * #endif
+ * };
+ */
+
+char *
+__gnat_servent_s_name (struct servent * s)
+{
+ return s->s_name;
+}
+
+char *
+__gnat_servent_s_alias (struct servent * s, int index)
+{
+ return s->s_aliases[index];
+}
+
+unsigned short
+__gnat_servent_s_port (struct servent * s)
+{
+ return s->s_port;
+}
+
+char *
+__gnat_servent_s_proto (struct servent * s)
+{
+ return s->s_proto;
+}
+
+#else
+# warning Sockets are not supported on this platform
+#endif /* defined(HAVE_SOCKETS) */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 11:05:44 +0000