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php-src/main/network.c

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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Stig Venaas <venaas@uninett.no> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#ifdef PHP_WIN32
#include <windows.h>
#include <winsock.h>
#define O_RDONLY _O_RDONLY
#include "win32/param.h"
#else
#include <sys/param.h>
#endif
#include <sys/types.h>
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifndef _FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifndef PHP_WIN32
#include <netinet/in.h>
#include <netdb.h>
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#endif
#ifndef HAVE_INET_ATON
int inet_aton(const char *, struct in_addr *);
#endif
#include "php_network.h"
#if defined(PHP_WIN32) || defined(__riscos__)
#undef AF_UNIX
#endif
#if defined(AF_UNIX)
#include <sys/un.h>
#endif
#ifdef PHP_WIN32
# define SOCK_ERR INVALID_SOCKET
# define SOCK_CONN_ERR SOCKET_ERROR
#else
# define SOCK_ERR -1
# define SOCK_CONN_ERR -1
#endif
#ifdef HAVE_GETADDRINFO
#ifdef HAVE_GAI_STRERROR
# define PHP_GAI_STRERROR(x) (gai_strerror(x))
#else
# define PHP_GAI_STRERROR(x) (php_gai_strerror(x))
/* {{{ php_gai_strerror
*/
static char *php_gai_strerror(int code)
{
static struct {
int code;
const char *msg;
} values[] = {
# ifdef EAI_ADDRFAMILY
{EAI_ADDRFAMILY, "Address family for hostname not supported"},
# endif
{EAI_AGAIN, "Temporary failure in name resolution"},
{EAI_BADFLAGS, "Bad value for ai_flags"},
{EAI_FAIL, "Non-recoverable failure in name resolution"},
{EAI_FAMILY, "ai_family not supported"},
{EAI_MEMORY, "Memory allocation failure"},
# ifdef EAI_NODATA
{EAI_NODATA, "No address associated with hostname"},
# endif
{EAI_NONAME, "Name or service not known"},
{EAI_SERVICE, "Servname not supported for ai_socktype"},
{EAI_SOCKTYPE, "ai_socktype not supported"},
{EAI_SYSTEM, "System error"},
{0, NULL}
};
int i;
for (i = 0; values[i].msg != NULL; i++) {
if (values[i].code == code) {
return (char *)values[i].msg;
}
}
return "Unknown error";
}
/* }}} */
#endif
#endif
/* {{{ php_network_freeaddresses
*/
static void php_network_freeaddresses(struct sockaddr **sal)
{
struct sockaddr **sap;
if (sal == NULL)
return;
for (sap = sal; *sap != NULL; sap++)
efree(*sap);
efree(sal);
}
/* }}} */
/* {{{ php_network_getaddresses
* Returns number of addresses, 0 for none/error
*/
static int php_network_getaddresses(const char *host, struct sockaddr ***sal)
{
struct sockaddr **sap;
int n;
if (host == NULL) {
return 0;
}
{
#ifdef HAVE_GETADDRINFO
struct addrinfo hints, *res, *sai;
memset(&hints, '\0', sizeof(hints));
hints.ai_family = AF_UNSPEC;
if ((n = getaddrinfo(host, NULL, &hints, &res))) {
php_error(E_WARNING, "php_network_getaddresses: getaddrinfo failed: %s", PHP_GAI_STRERROR(n));
return 0;
} else if (res == NULL) {
php_error(E_WARNING, "php_network_getaddresses: getaddrinfo failed (null result pointer)");
return 0;
}
sai = res;
for (n = 1; (sai = sai->ai_next) != NULL; n++);
*sal = emalloc((n + 1) * sizeof(*sal));
sai = res;
sap = *sal;
do {
switch (sai->ai_family) {
# ifdef HAVE_IPV6
case AF_INET6:
*sap = emalloc(sizeof(struct sockaddr_in6));
*(struct sockaddr_in6 *)*sap =
*((struct sockaddr_in6 *)sai->ai_addr);
sap++;
break;
# endif
case AF_INET:
*sap = emalloc(sizeof(struct sockaddr_in));
*(struct sockaddr_in *)*sap =
*((struct sockaddr_in *)sai->ai_addr);
sap++;
break;
}
} while ((sai = sai->ai_next) != NULL);
freeaddrinfo(res);
#else
struct hostent *host_info;
struct in_addr in;
if (!inet_aton(host, &in)) {
/* XXX NOT THREAD SAFE */
host_info = gethostbyname(host);
if (host_info == NULL) {
php_error(E_WARNING, "php_network_getaddresses: gethostbyname failed");
return 0;
}
in = *((struct in_addr *) host_info->h_addr);
}
*sal = emalloc(2 * sizeof(*sal));
sap = *sal;
*sap = emalloc(sizeof(struct sockaddr_in));
(*sap)->sa_family = AF_INET;
((struct sockaddr_in *)*sap)->sin_addr = in;
sap++;
n = 1;
#endif
}
*sap = NULL;
return n;
}
/* }}} */
/* {{{ php_connect_nonb */
PHPAPI int php_connect_nonb(int sockfd,
const struct sockaddr *addr,
socklen_t addrlen,
struct timeval *timeout)
{
/* probably won't work on Win32, someone else might try it (read: fix it ;) */
#if (!defined(__BEOS__) && !defined(PHP_WIN32)) && (defined(O_NONBLOCK) || defined(O_NDELAY))
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
int flags;
int n;
int error = 0;
socklen_t len;
int ret = 0;
fd_set rset;
fd_set wset;
if (timeout == NULL) {
/* blocking mode */
return connect(sockfd, addr, addrlen);
}
flags = fcntl(sockfd, F_GETFL, 0);
fcntl(sockfd, F_SETFL, flags | O_NONBLOCK);
if ((n = connect(sockfd, addr, addrlen)) < 0) {
if (errno != EINPROGRESS) {
return -1;
}
}
if (n == 0) {
goto ok;
}
FD_ZERO(&rset);
FD_SET(sockfd, &rset);
wset = rset;
if ((n = select(sockfd + 1, &rset, &wset, NULL, timeout)) == 0) {
error = ETIMEDOUT;
}
if(FD_ISSET(sockfd, &rset) || FD_ISSET(sockfd, &wset)) {
len = sizeof(error);
/*
BSD-derived systems set errno correctly
Solaris returns -1 from getsockopt in case of error
*/
if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
ret = -1;
}
} else {
/* whoops: sockfd has disappeared */
ret = -1;
}
ok:
fcntl(sockfd, F_SETFL, flags);
if(error) {
errno = error;
ret = -1;
}
return ret;
#else /* !defined(PHP_WIN32) && ... */
return connect(sockfd, addr, addrlen);
#endif
}
/* }}} */
/* {{{ php_hostconnect
* Creates a socket of type socktype and connects to the given host and
* port, returns the created socket on success, else returns -1.
* timeout gives timeout in seconds, 0 means blocking mode.
*/
int php_hostconnect(const char *host, unsigned short port, int socktype, int timeout)
{
int n, repeatto, s;
struct sockaddr **sal, **psal;
struct timeval timeoutval;
n = php_network_getaddresses(host, &sal);
if (n == 0)
return -1;
/* is this a good idea? 5s? */
repeatto = timeout / n > 5;
if (repeatto) {
timeout /= n;
}
timeoutval.tv_sec = timeout;
timeoutval.tv_usec = 0;
psal = sal;
while (*sal != NULL) {
s = socket((*sal)->sa_family, socktype, 0);
if (s != SOCK_ERR) {
switch ((*sal)->sa_family) {
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_IPV6 )
case AF_INET6:
{
struct sockaddr_in6 *sa =
(struct sockaddr_in6 *)*sal;
sa->sin6_family = (*sal)->sa_family;
sa->sin6_port = htons(port);
if (php_connect_nonb(s, (struct sockaddr *) sa,
sizeof(*sa), timeout ? &timeoutval : NULL) != SOCK_CONN_ERR)
goto ok;
}
break;
#endif
case AF_INET:
{
struct sockaddr_in *sa =
(struct sockaddr_in *)*sal;
sa->sin_family = (*sal)->sa_family;
sa->sin_port = htons(port);
if (php_connect_nonb(s, (struct sockaddr *) sa,
sizeof(*sa), timeout ? &timeoutval : NULL) != SOCK_CONN_ERR)
goto ok;
}
break;
}
close (s);
}
sal++;
if (repeatto) {
timeoutval.tv_sec = timeout;
timeoutval.tv_usec = 0;
}
}
php_network_freeaddresses(psal);
php_error(E_WARNING, "php_hostconnect: connect failed");
return -1;
ok:
php_network_freeaddresses(psal);
return s;
}
/* }}} */
/* {{{ php_any_addr
* Fills the any (wildcard) address into php_sockaddr_storage
*/
void php_any_addr(int family, php_sockaddr_storage *addr, unsigned short port)
{
memset(addr, 0, sizeof(php_sockaddr_storage));
switch (family) {
#ifdef HAVE_IPV6
case AF_INET6: {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(port);
sin6->sin6_addr = in6addr_any;
break;
}
#endif
case AF_INET: {
struct sockaddr_in *sin = (struct sockaddr_in *) addr;
sin->sin_family = AF_INET;
sin->sin_port = htons(port);
sin->sin_addr.s_addr = INADDR_ANY;
break;
}
}
}
/* }}} */
/*
* Local variables:
* tab-width: 8
* c-basic-offset: 8
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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