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99e290f882
We avoid the problem by using poll(2). On systems without poll(2) (older bsd-ish systems, and win32), we emulate poll(2) using select(2) and check for valid descriptors before attempting to access them via the descriptor sets. If an out-of-range descriptor is detected, an E_WARNING is raised suggesting that PHP should be recompiled with a larger FD_SETSIZE (and also with a suggested value). Most uses of select(2) in the source are to poll a single descriptor, so a couple of handy wrapper functions have been added to make this easier. A configure option --enable-fd-setsize has been added to both the unix and win32 builds; on unix we default to 16384 and on windows we default to 256. Windows FD_SETSIZE imposes a limit on the maximum number of descriptors that can be select()ed at once, whereas the unix FD_SETSIZE limit is based on the highest numbered descriptor; 256 should be plenty for PHP scripts under windows (the default OS setting is 64). The win32 specific parts are untested; will do that now.
318 lines
9.3 KiB
C
318 lines
9.3 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2004 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.0 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_0.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Stig Venaas <venaas@uninett.no> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#ifndef _PHP_NETWORK_H
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#define _PHP_NETWORK_H
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#ifdef PHP_WIN32
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# ifndef WINNT
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# define WINNT 1
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# endif
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# undef FD_SETSIZE
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# include "arpa/inet.h"
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/* Apache folks decided that strtoul was evil and redefined
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* it to something that breaks the windows headers */
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# undef strtoul
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/* defines socklen_t and some IPV6 stuff */
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# include <ws2tcpip.h>
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# if HAVE_WSPIAPI_H
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/* getaddrinfo */
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# include <wspiapi.h>
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# endif
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#else
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# undef closesocket
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# define closesocket close
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#endif
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#ifndef HAVE_SHUTDOWN
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#undef shutdown
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#define shutdown(s,n) /* nothing */
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#endif
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#ifdef PHP_WIN32
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#define EWOULDBLOCK WSAEWOULDBLOCK
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#define EINPROGRESS WSAEWOULDBLOCK
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# define fsync _commit
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# define ftruncate(a, b) chsize(a, b)
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#endif /* defined(PHP_WIN32) */
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#ifdef PHP_WIN32
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#define php_socket_errno() WSAGetLastError()
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#else
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#define php_socket_errno() errno
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#endif
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/* like strerror, but caller must efree the returned string,
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* unless buf is not NULL.
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* Also works sensibly for win32 */
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BEGIN_EXTERN_C()
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PHPAPI char *php_socket_strerror(long err, char *buf, size_t bufsize);
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END_EXTERN_C()
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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/* These are here, rather than with the win32 counterparts above,
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* since <sys/socket.h> defines them. */
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#ifndef SHUT_RD
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# define SHUT_RD 0
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# define SHUT_WR 1
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# define SHUT_RDWR 2
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_STDDEF_H
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#include <stddef.h>
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#endif
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#ifdef PHP_WIN32
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typedef SOCKET php_socket_t;
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#else
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typedef int php_socket_t;
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#endif
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#ifdef PHP_WIN32
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# define SOCK_ERR INVALID_SOCKET
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# define SOCK_CONN_ERR SOCKET_ERROR
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# define SOCK_RECV_ERR SOCKET_ERROR
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#else
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# define SOCK_ERR -1
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# define SOCK_CONN_ERR -1
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# define SOCK_RECV_ERR -1
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#endif
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/* uncomment this to debug poll(2) emulation on systems that have poll(2) */
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/* #define PHP_USE_POLL_2_EMULATION 1 */
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#if defined(HAVE_SYS_POLL_H) && defined(HAVE_POLL)
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# include <sys/poll.h>
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typedef struct pollfd php_pollfd;
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#else
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typedef struct _php_pollfd {
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php_socket_t fd;
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short events;
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short revents;
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} php_pollfd;
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PHPAPI int php_poll2(php_pollfd *ufds, unsigned int nfds, int timeout);
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# define POLLIN 0x0001 /* There is data to read */
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# define POLLPRI 0x0002 /* There is urgent data to read */
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# define POLLOUT 0x0004 /* Writing now will not block */
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# define POLLERR 0x0008 /* Error condition */
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# define POLLHUP 0x0010 /* Hung up */
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# define POLLNVAL 0x0020 /* Invalid request: fd not open */
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# ifndef PHP_USE_POLL_2_EMULATION
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# define PHP_USE_POLL_2_EMULATION 1
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# endif
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#endif
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#define PHP_POLLREADABLE (POLLIN|POLLERR|POLLHUP)
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#ifndef PHP_USE_POLL_2_EMULATION
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# define php_poll2(ufds, nfds, timeout) poll(ufds, nfds, timeout)
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#endif
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/* timeval-to-timeout (for poll(2)) */
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static inline int php_tvtoto(struct timeval *timeouttv)
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{
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if (timeouttv) {
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return (timeouttv->tv_sec * 1000) + (timeouttv->tv_usec / 1000);
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}
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return -1;
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}
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/* hybrid select(2)/poll(2) for a single descriptor.
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* timeouttv follows same rules as select(2), but is reduced to millisecond accuracy.
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* Returns 0 on timeout, -1 on error, or the event mask (ala poll(2)).
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*/
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static inline int php_pollfd_for(php_socket_t fd, int events, struct timeval *timeouttv)
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{
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php_pollfd p;
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int n;
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p.fd = fd;
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p.events = events;
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p.revents = 0;
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n = php_poll2(&p, 1, php_tvtoto(timeouttv));
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if (n > 0) {
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return p.revents;
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}
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return n;
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}
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static inline int php_pollfd_for_ms(php_socket_t fd, int events, int timeout)
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{
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php_pollfd p;
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int n;
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p.fd = fd;
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p.events = events;
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p.revents = 0;
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n = php_poll2(&p, 1, timeout);
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if (n > 0) {
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return p.revents;
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}
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return n;
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}
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/* emit warning and suggestion for unsafe select(2) usage */
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PHPAPI void _php_emit_fd_setsize_warning(int max_fd);
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#ifdef PHP_WIN32
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/* it is safe to FD_SET too many fd's under win32; the macro will simply ignore
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* descriptors that go beyond the default FD_SETSIZE */
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# define PHP_SAFE_FD_SET(fd, set) FD_SET(fd, set)
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# define PHP_SAFE_FD_ISSET(fd, set) FD_ISSET(fd, set)
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# define PHP_SAFE_MAX_FD(m, n) do { if (n + 1 >= FD_SETSIZE) { _php_emit_fd_setsize_warning(n); }} while(0)
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#else
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# define PHP_SAFE_FD_SET(fd, set) do { if (fd < FD_SETSIZE) FD_SET(fd, set); } while(0)
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# define PHP_SAFE_FD_ISSET(fd, set) ((fd < FD_SETSIZE) && FD_ISSET(fd, set))
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# define PHP_SAFE_MAX_FD(m, n) do { if (m >= FD_SETSIZE) { _php_emit_fd_setsize_warning(m); m = FD_SETSIZE - 1; }} while(0)
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#endif
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#define PHP_SOCK_CHUNK_SIZE 8192
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#ifdef HAVE_SOCKADDR_STORAGE
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typedef struct sockaddr_storage php_sockaddr_storage;
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#else
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typedef struct {
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#ifdef HAVE_SOCKADDR_LEN
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unsigned char ss_len;
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unsigned char ss_family;
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#else
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unsigned short ss_family;
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#endif
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char info[126];
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} php_sockaddr_storage;
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#endif
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BEGIN_EXTERN_C()
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PHPAPI php_socket_t php_network_connect_socket_to_host(const char *host, unsigned short port,
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int socktype, int asynchronous, struct timeval *timeout, char **error_string,
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int *error_code
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TSRMLS_DC);
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PHPAPI int php_network_connect_socket(php_socket_t sockfd,
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const struct sockaddr *addr,
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socklen_t addrlen,
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int asynchronous,
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struct timeval *timeout,
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char **error_string,
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int *error_code);
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#define php_connect_nonb(sock, addr, addrlen, timeout) \
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php_network_connect_socket((sock), (addr), (addrlen), 0, (timeout), NULL, NULL)
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PHPAPI php_socket_t php_network_bind_socket_to_local_addr(const char *host, unsigned port,
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int socktype, char **error_string, int *error_code
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TSRMLS_DC);
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PHPAPI php_socket_t php_network_accept_incoming(php_socket_t srvsock,
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char **textaddr, long *textaddrlen,
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struct sockaddr **addr,
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socklen_t *addrlen,
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struct timeval *timeout,
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char **error_string,
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int *error_code
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TSRMLS_DC);
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PHPAPI int php_network_get_sock_name(php_socket_t sock,
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char **textaddr, long *textaddrlen,
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struct sockaddr **addr,
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socklen_t *addrlen
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TSRMLS_DC);
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PHPAPI int php_network_get_peer_name(php_socket_t sock,
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char **textaddr, long *textaddrlen,
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struct sockaddr **addr,
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socklen_t *addrlen
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TSRMLS_DC);
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PHPAPI void php_any_addr(int family, php_sockaddr_storage *addr, unsigned short port);
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PHPAPI int php_sockaddr_size(php_sockaddr_storage *addr);
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END_EXTERN_C()
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struct _php_netstream_data_t {
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php_socket_t socket;
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char is_blocked;
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struct timeval timeout;
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char timeout_event;
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size_t ownsize;
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};
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typedef struct _php_netstream_data_t php_netstream_data_t;
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PHPAPI extern php_stream_ops php_stream_socket_ops;
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extern php_stream_ops php_stream_generic_socket_ops;
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#define PHP_STREAM_IS_SOCKET (&php_stream_socket_ops)
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BEGIN_EXTERN_C()
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PHPAPI php_stream *_php_stream_sock_open_from_socket(php_socket_t socket, const char *persistent_id STREAMS_DC TSRMLS_DC );
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/* open a connection to a host using php_hostconnect and return a stream */
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PHPAPI php_stream *_php_stream_sock_open_host(const char *host, unsigned short port,
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int socktype, struct timeval *timeout, const char *persistent_id STREAMS_DC TSRMLS_DC);
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PHPAPI void php_network_populate_name_from_sockaddr(
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/* input address */
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struct sockaddr *sa, socklen_t sl,
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/* output readable address */
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char **textaddr, long *textaddrlen,
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/* output address */
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struct sockaddr **addr,
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socklen_t *addrlen
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TSRMLS_DC);
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PHPAPI int php_network_parse_network_address_with_port(const char *addr,
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long addrlen, struct sockaddr *sa, socklen_t *sl TSRMLS_DC);
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END_EXTERN_C()
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#define php_stream_sock_open_from_socket(socket, persistent) _php_stream_sock_open_from_socket((socket), (persistent) STREAMS_CC TSRMLS_CC)
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#define php_stream_sock_open_host(host, port, socktype, timeout, persistent) _php_stream_sock_open_host((host), (port), (socktype), (timeout), (persistent) STREAMS_CC TSRMLS_CC)
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/* {{{ memory debug */
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#define php_stream_sock_open_from_socket_rel(socket, persistent) _php_stream_sock_open_from_socket((socket), (persistent) STREAMS_REL_CC TSRMLS_CC)
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#define php_stream_sock_open_host_rel(host, port, socktype, timeout, persistent) _php_stream_sock_open_host((host), (port), (socktype), (timeout), (persistent) STREAMS_REL_CC TSRMLS_CC)
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#define php_stream_sock_open_unix_rel(path, pathlen, persistent, timeval) _php_stream_sock_open_unix((path), (pathlen), (persistent), (timeval) STREAMS_REL_CC TSRMLS_CC)
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/* }}} */
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#endif /* _PHP_NETWORK_H */
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/*
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* Local variables:
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* tab-width: 8
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* c-basic-offset: 8
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* End:
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*/
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