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network.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.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. |
+----------------------------------------------------------------------+
| Author: Stig Venaas <venaas@uninett.no> |
| Streams work by Wez Furlong <wez@thebrainroom.com> |
+----------------------------------------------------------------------+
*/
/*#define DEBUG_MAIN_NETWORK 1*/
#include "php.h"
#include <stddef.h>
#include <errno.h>
#ifdef PHP_WIN32
# include <Ws2tcpip.h>
# include "win32/inet.h"
# include "win32/winutil.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
#if HAVE_POLL_H
#include <poll.h>
#elif HAVE_SYS_POLL_H
#include <sys/poll.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
#include "ext/standard/file.h"
#ifdef PHP_WIN32
# include "win32/time.h"
# define SOCK_ERR INVALID_SOCKET
# define SOCK_CONN_ERR SOCKET_ERROR
# define PHP_TIMEOUT_ERROR_VALUE WSAETIMEDOUT
#if HAVE_IPV6
const struct in6_addr in6addr_any = {0}; /* IN6ADDR_ANY_INIT; */
#endif
#else
# define SOCK_ERR -1
# define SOCK_CONN_ERR -1
# define PHP_TIMEOUT_ERROR_VALUE ETIMEDOUT
#endif
#if 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 const 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"},
# ifdef EAI_SYSTEM
{EAI_SYSTEM, "System error"},
# endif
{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 */
PHPAPI 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
*/
PHPAPI int php_network_getaddresses(const char *host, int socktype, struct sockaddr ***sal, zend_string **error_string)
{
struct sockaddr **sap;
int n;
#if HAVE_GETADDRINFO
# if HAVE_IPV6
static int ipv6_borked = -1; /* the way this is used *is* thread safe */
# endif
struct addrinfo hints, *res, *sai;
#else
struct hostent *host_info;
struct in_addr in;
#endif
if (host == NULL) {
return 0;
}
#if HAVE_GETADDRINFO
memset(&hints, '\0', sizeof(hints));
hints.ai_family = AF_INET; /* default to regular inet (see below) */
hints.ai_socktype = socktype;
# if HAVE_IPV6
/* probe for a working IPv6 stack; even if detected as having v6 at compile
* time, at runtime some stacks are slow to resolve or have other issues
* if they are not correctly configured.
* static variable use is safe here since simple store or fetch operations
* are atomic and because the actual probe process is not in danger of
* collisions or race conditions. */
if (ipv6_borked == -1) {
int s;
s = socket(PF_INET6, SOCK_DGRAM, 0);
if (s == SOCK_ERR) {
ipv6_borked = 1;
} else {
ipv6_borked = 0;
closesocket(s);
}
}
hints.ai_family = ipv6_borked ? AF_INET : AF_UNSPEC;
# endif
if ((n = getaddrinfo(host, NULL, &hints, &res))) {
if (error_string) {
/* free error string received during previous iteration (if any) */
if (*error_string) {
zend_string_release_ex(*error_string, 0);
}
*error_string = strpprintf(0, "php_network_getaddresses: getaddrinfo for %s failed: %s", host, PHP_GAI_STRERROR(n));
php_error_docref(NULL, E_WARNING, "%s", ZSTR_VAL(*error_string));
} else {
php_error_docref(NULL, E_WARNING, "php_network_getaddresses: getaddrinfo for %s failed: %s", host, PHP_GAI_STRERROR(n));
}
return 0;
} else if (res == NULL) {
if (error_string) {
/* free error string received during previous iteration (if any) */
if (*error_string) {
zend_string_release_ex(*error_string, 0);
}
*error_string = strpprintf(0, "php_network_getaddresses: getaddrinfo for %s failed (null result pointer) errno=%d", host, errno);
php_error_docref(NULL, E_WARNING, "%s", ZSTR_VAL(*error_string));
} else {
php_error_docref(NULL, E_WARNING, "php_network_getaddresses: getaddrinfo for %s failed (null result pointer)", host);
}
return 0;
}
sai = res;
for (n = 1; (sai = sai->ai_next) != NULL; n++)
;
*sal = safe_emalloc((n + 1), sizeof(*sal), 0);
sai = res;
sap = *sal;
do {
*sap = emalloc(sai->ai_addrlen);
memcpy(*sap, sai->ai_addr, sai->ai_addrlen);
sap++;
} while ((sai = sai->ai_next) != NULL);
freeaddrinfo(res);
#else
#ifdef HAVE_INET_PTON
if (!inet_pton(AF_INET, host, &in)) {
#else
if (!inet_aton(host, &in)) {
#endif
if(strlen(host) > MAXFQDNLEN) {
host_info = NULL;
errno = E2BIG;
} else {
host_info = php_network_gethostbyname(host);
}
if (host_info == NULL) {
if (error_string) {
/* free error string received during previous iteration (if any) */
if (*error_string) {
zend_string_release_ex(*error_string, 0);
}
*error_string = strpprintf(0, "php_network_getaddresses: gethostbyname failed. errno=%d", errno);
php_error_docref(NULL, E_WARNING, "%s", ZSTR_VAL(*error_string));
} else {
php_error_docref(NULL, E_WARNING, "php_network_getaddresses: gethostbyname failed");
}
return 0;
}
in = *((struct in_addr *) host_info->h_addr);
}
*sal = safe_emalloc(2, sizeof(*sal), 0);
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;
}
/* }}} */
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
#ifdef PHP_WIN32
typedef u_long php_non_blocking_flags_t;
# define SET_SOCKET_BLOCKING_MODE(sock, save) \
save = TRUE; ioctlsocket(sock, FIONBIO, &save)
# define RESTORE_SOCKET_BLOCKING_MODE(sock, save) \
ioctlsocket(sock, FIONBIO, &save)
#else
typedef int php_non_blocking_flags_t;
# define SET_SOCKET_BLOCKING_MODE(sock, save) \
save = fcntl(sock, F_GETFL, 0); \
fcntl(sock, F_SETFL, save | O_NONBLOCK)
# define RESTORE_SOCKET_BLOCKING_MODE(sock, save) \
fcntl(sock, F_SETFL, save)
#endif
#if HAVE_GETTIMEOFDAY
/* Subtract times */
static inline void sub_times(struct timeval a, struct timeval b, struct timeval *result)
{
result->tv_usec = a.tv_usec - b.tv_usec;
if (result->tv_usec < 0L) {
a.tv_sec--;
result->tv_usec += 1000000L;
}
result->tv_sec = a.tv_sec - b.tv_sec;
if (result->tv_sec < 0L) {
result->tv_sec++;
result->tv_usec -= 1000000L;
}
}
static inline void php_network_set_limit_time(struct timeval *limit_time,
struct timeval *timeout)
{
gettimeofday(limit_time, NULL);
limit_time->tv_sec += timeout->tv_sec;
limit_time->tv_usec += timeout->tv_usec;
if (limit_time->tv_usec >= 1000000) {
limit_time->tv_usec -= 1000000;
limit_time->tv_sec++;
}
}
#endif
/* Connect to a socket using an interruptible connect with optional timeout.
* Optionally, the connect can be made asynchronously, which will implicitly
* enable non-blocking mode on the socket.
* */
/* {{{ php_network_connect_socket */
PHPAPI int php_network_connect_socket(php_socket_t sockfd,
const struct sockaddr *addr,
socklen_t addrlen,
int asynchronous,
struct timeval *timeout,
zend_string **error_string,
int *error_code)
{
php_non_blocking_flags_t orig_flags;
int n;
int error = 0;
socklen_t len;
int ret = 0;
SET_SOCKET_BLOCKING_MODE(sockfd, orig_flags);
if ((n = connect(sockfd, addr, addrlen)) != 0) {
error = php_socket_errno();
if (error_code) {
*error_code = error;
}
if (error != EINPROGRESS) {
if (error_string) {
*error_string = php_socket_error_str(error);
}
return -1;
}
if (asynchronous && error == EINPROGRESS) {
/* this is fine by us */
return 0;
}
}
if (n == 0) {
goto ok;
}
# ifdef PHP_WIN32
/* The documentation for connect() says in case of non-blocking connections
* the select function reports success in the writefds set and failure in
* the exceptfds set. Indeed, using PHP_POLLREADABLE results in select
* failing only due to the timeout and not immediately as would be
* expected when a connection is actively refused. This way,
* php_pollfd_for will return a mask with POLLOUT if the connection
* is successful and with POLLPRI otherwise. */
int events = POLLOUT|POLLPRI;
#else
int events = PHP_POLLREADABLE|POLLOUT;
#endif
struct timeval working_timeout;
#if HAVE_GETTIMEOFDAY
struct timeval limit_time, time_now;
#endif
if (timeout) {
memcpy(&working_timeout, timeout, sizeof(working_timeout));
#if HAVE_GETTIMEOFDAY
php_network_set_limit_time(&limit_time, &working_timeout);
#endif
}
while (true) {
n = php_pollfd_for(sockfd, events, timeout ? &working_timeout : NULL);
if (n < 0) {
if (errno == EINTR) {
#if HAVE_GETTIMEOFDAY
if (timeout) {
gettimeofday(&time_now, NULL);
if (!timercmp(&time_now, &limit_time, <)) {
/* time limit expired; no need for another poll */
error = PHP_TIMEOUT_ERROR_VALUE;
break;
} else {
/* work out remaining time */
sub_times(limit_time, time_now, &working_timeout);
}
}
#endif
continue;
}
ret = -1;
} else if (n == 0) {
error = PHP_TIMEOUT_ERROR_VALUE;
} else {
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, (char*)&error, &len) != 0) {
ret = -1;
}
}
break;
}
ok:
if (!asynchronous) {
/* back to blocking mode */
RESTORE_SOCKET_BLOCKING_MODE(sockfd, orig_flags);
}
if (error_code) {
*error_code = error;
}
if (error) {
ret = -1;
if (error_string) {
*error_string = php_socket_error_str(error);
}
}
return ret;
}
/* }}} */
/* Bind to a local IP address.
* Returns the bound socket, or -1 on failure.
* */
/* {{{ php_network_bind_socket_to_local_addr */
php_socket_t php_network_bind_socket_to_local_addr(const char *host, unsigned port,
int socktype, long sockopts, zend_string **error_string, int *error_code
)
{
int num_addrs, n, err = 0;
php_socket_t sock;
struct sockaddr **sal, **psal, *sa;
socklen_t socklen;
int sockoptval = 1;
num_addrs = php_network_getaddresses(host, socktype, &psal, error_string);
if (num_addrs == 0) {
/* could not resolve address(es) */
return -1;
}
for (sal = psal; *sal != NULL; sal++) {
sa = *sal;
switch (sa->sa_family) {
#if HAVE_GETADDRINFO && HAVE_IPV6
case AF_INET6:
((struct sockaddr_in6 *)sa)->sin6_port = htons(port);
socklen = sizeof(struct sockaddr_in6);
break;
#endif
case AF_INET:
((struct sockaddr_in *)sa)->sin_port = htons(port);
socklen = sizeof(struct sockaddr_in);
break;
default:
/* Unsupported family, skip to the next */
continue;
}
/* create a socket for this address */
sock = socket(sa->sa_family, socktype, 0);
if (sock == SOCK_ERR) {
continue;
}
/* attempt to bind */
#ifdef SO_REUSEADDR
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&sockoptval, sizeof(sockoptval));
#endif
#ifdef IPV6_V6ONLY
if (sockopts & STREAM_SOCKOP_IPV6_V6ONLY) {
int ipv6_val = !!(sockopts & STREAM_SOCKOP_IPV6_V6ONLY_ENABLED);
setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&ipv6_val, sizeof(sockoptval));
}
#endif
#ifdef SO_REUSEPORT
if (sockopts & STREAM_SOCKOP_SO_REUSEPORT) {
setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (char*)&sockoptval, sizeof(sockoptval));
}
#endif
#ifdef SO_BROADCAST
if (sockopts & STREAM_SOCKOP_SO_BROADCAST) {
setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char*)&sockoptval, sizeof(sockoptval));
}
#endif
#ifdef TCP_NODELAY
if (sockopts & STREAM_SOCKOP_TCP_NODELAY) {
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char*)&sockoptval, sizeof(sockoptval));
}
#endif
n = bind(sock, sa, socklen);
if (n != SOCK_CONN_ERR) {
goto bound;
}
err = php_socket_errno();
closesocket(sock);
}
sock = -1;
if (error_code) {
*error_code = err;
}
if (error_string) {
*error_string = php_socket_error_str(err);
}
bound:
php_network_freeaddresses(psal);
return sock;
}
/* }}} */
PHPAPI int php_network_parse_network_address_with_port(const char *addr, zend_long addrlen, struct sockaddr *sa, socklen_t *sl)
{
char *colon;
char *tmp;
int ret = FAILURE;
short port;
struct sockaddr_in *in4 = (struct sockaddr_in*)sa;
struct sockaddr **psal;
int n;
zend_string *errstr = NULL;
#if HAVE_IPV6
struct sockaddr_in6 *in6 = (struct sockaddr_in6*)sa;
memset(in6, 0, sizeof(struct sockaddr_in6));
#else
memset(in4, 0, sizeof(struct sockaddr_in));
#endif
if (*addr == '[') {
colon = memchr(addr + 1, ']', addrlen-1);
if (!colon || colon[1] != ':') {
return FAILURE;
}
port = atoi(colon + 2);
addr++;
} else {
colon = memchr(addr, ':', addrlen);
if (!colon) {
return FAILURE;
}
port = atoi(colon + 1);
}
tmp = estrndup(addr, colon - addr);
/* first, try interpreting the address as a numeric address */
#if HAVE_IPV6 && HAVE_INET_PTON
if (inet_pton(AF_INET6, tmp, &in6->sin6_addr) > 0) {
in6->sin6_port = htons(port);
in6->sin6_family = AF_INET6;
*sl = sizeof(struct sockaddr_in6);
ret = SUCCESS;
goto out;
}
#endif
#ifdef HAVE_INET_PTON
if (inet_pton(AF_INET, tmp, &in4->sin_addr) > 0) {
#else
if (inet_aton(tmp, &in4->sin_addr) > 0) {
#endif
in4->sin_port = htons(port);
in4->sin_family = AF_INET;
*sl = sizeof(struct sockaddr_in);
ret = SUCCESS;
goto out;
}
/* looks like we'll need to resolve it */
n = php_network_getaddresses(tmp, SOCK_DGRAM, &psal, &errstr);
if (n == 0) {
if (errstr) {
php_error_docref(NULL, E_WARNING, "Failed to resolve `%s': %s", tmp, ZSTR_VAL(errstr));
zend_string_release_ex(errstr, 0);
}
goto out;
}
/* copy the details from the first item */
switch ((*psal)->sa_family) {
#if HAVE_GETADDRINFO && HAVE_IPV6
case AF_INET6:
*in6 = **(struct sockaddr_in6**)psal;
in6->sin6_port = htons(port);
*sl = sizeof(struct sockaddr_in6);
ret = SUCCESS;
break;
#endif
case AF_INET:
*in4 = **(struct sockaddr_in**)psal;
in4->sin_port = htons(port);
*sl = sizeof(struct sockaddr_in);
ret = SUCCESS;
break;
}
php_network_freeaddresses(psal);
out:
efree(tmp);
return ret;
}
PHPAPI void php_network_populate_name_from_sockaddr(
/* input address */
struct sockaddr *sa, socklen_t sl,
/* output readable address */
zend_string **textaddr,
/* output address */
struct sockaddr **addr,
socklen_t *addrlen
)
{
if (addr) {
*addr = emalloc(sl);
memcpy(*addr, sa, sl);
*addrlen = sl;
}
if (textaddr) {
#ifdef HAVE_INET_NTOP
char abuf[256];
#endif
const char *buf = NULL;
switch (sa->sa_family) {
case AF_INET:
/* generally not thread safe, but it *is* thread safe under win32 */
#ifdef HAVE_INET_NTOP
buf = inet_ntop(AF_INET, &((struct sockaddr_in*)sa)->sin_addr, (char *)&abuf, sizeof(abuf));
#else
buf = inet_ntoa(((struct sockaddr_in*)sa)->sin_addr);
#endif
if (buf) {
*textaddr = strpprintf(0, "%s:%d",
buf, ntohs(((struct sockaddr_in*)sa)->sin_port));
}
break;
#if HAVE_IPV6 && HAVE_INET_NTOP
case AF_INET6:
buf = (char*)inet_ntop(sa->sa_family, &((struct sockaddr_in6*)sa)->sin6_addr, (char *)&abuf, sizeof(abuf));
if (buf) {
*textaddr = strpprintf(0, "[%s]:%d",
buf, ntohs(((struct sockaddr_in6*)sa)->sin6_port));
}
break;
#endif
#ifdef AF_UNIX
case AF_UNIX:
{
struct sockaddr_un *ua = (struct sockaddr_un*)sa;
if (ua->sun_path[0] == '\0') {
/* abstract name */
int len = sl - sizeof(sa_family_t);
*textaddr = zend_string_init((char*)ua->sun_path, len, 0);
} else {
int len = strlen(ua->sun_path);
*textaddr = zend_string_init((char*)ua->sun_path, len, 0);
}
}
break;
#endif
}
}
}
PHPAPI int php_network_get_peer_name(php_socket_t sock,
zend_string **textaddr,
struct sockaddr **addr,
socklen_t *addrlen
)
{
php_sockaddr_storage sa;
socklen_t sl = sizeof(sa);
memset(&sa, 0, sizeof(sa));
if (getpeername(sock, (struct sockaddr*)&sa, &sl) == 0) {
php_network_populate_name_from_sockaddr((struct sockaddr*)&sa, sl,
textaddr,
addr, addrlen
);
return 0;
}
return -1;
}
PHPAPI int php_network_get_sock_name(php_socket_t sock,
zend_string **textaddr,
struct sockaddr **addr,
socklen_t *addrlen
)
{
php_sockaddr_storage sa;
socklen_t sl = sizeof(sa);
memset(&sa, 0, sizeof(sa));
if (getsockname(sock, (struct sockaddr*)&sa, &sl) == 0) {
php_network_populate_name_from_sockaddr((struct sockaddr*)&sa, sl,
textaddr,
addr, addrlen
);
return 0;
}
return -1;
}
/* Accept a client connection from a server socket,
* using an optional timeout.
* Returns the peer address in addr/addrlen (it will emalloc
* these, so be sure to efree the result).
* If you specify textaddr, a text-printable
* version of the address will be emalloc'd and returned.
* */
/* {{{ php_network_accept_incoming */
PHPAPI php_socket_t php_network_accept_incoming(php_socket_t srvsock,
zend_string **textaddr,
struct sockaddr **addr,
socklen_t *addrlen,
struct timeval *timeout,
zend_string **error_string,
int *error_code,
int tcp_nodelay
)
{
php_socket_t clisock = -1;
int error = 0, n;
php_sockaddr_storage sa;
socklen_t sl;
n = php_pollfd_for(srvsock, PHP_POLLREADABLE, timeout);
if (n == 0) {
error = PHP_TIMEOUT_ERROR_VALUE;
} else if (n == -1) {
error = php_socket_errno();
} else {
sl = sizeof(sa);
clisock = accept(srvsock, (struct sockaddr*)&sa, &sl);
if (clisock != SOCK_ERR) {
php_network_populate_name_from_sockaddr((struct sockaddr*)&sa, sl,
textaddr,
addr, addrlen
);
if (tcp_nodelay) {
#ifdef TCP_NODELAY
setsockopt(clisock, IPPROTO_TCP, TCP_NODELAY, (char*)&tcp_nodelay, sizeof(tcp_nodelay));
#endif
}
} else {
error = php_socket_errno();
}
}
if (error_code) {
*error_code = error;
}
if (error_string) {
*error_string = php_socket_error_str(error);
}
return clisock;
}
/* }}} */
/* Connect to a remote host using an interruptible connect with optional timeout.
* Optionally, the connect can be made asynchronously, which will implicitly
* enable non-blocking mode on the socket.
* Returns the connected (or connecting) socket, or -1 on failure.
* */
/* {{{ php_network_connect_socket_to_host */
php_socket_t php_network_connect_socket_to_host(const char *host, unsigned short port,
int socktype, int asynchronous, struct timeval *timeout, zend_string **error_string,
int *error_code, const char *bindto, unsigned short bindport, long sockopts
)
{
int num_addrs, n, fatal = 0;
php_socket_t sock;
struct sockaddr **sal, **psal, *sa;
struct timeval working_timeout;
socklen_t socklen;
#if HAVE_GETTIMEOFDAY
struct timeval limit_time, time_now;
#endif
num_addrs = php_network_getaddresses(host, socktype, &psal, error_string);
if (num_addrs == 0) {
/* could not resolve address(es) */
return -1;
}
if (timeout) {
memcpy(&working_timeout, timeout, sizeof(working_timeout));
#if HAVE_GETTIMEOFDAY
php_network_set_limit_time(&limit_time, &working_timeout);
#endif
}
for (sal = psal; !fatal && *sal != NULL; sal++) {
sa = *sal;
switch (sa->sa_family) {
#if HAVE_GETADDRINFO && HAVE_IPV6
case AF_INET6:
if (!bindto || strchr(bindto, ':')) {
((struct sockaddr_in6 *)sa)->sin6_port = htons(port);
socklen = sizeof(struct sockaddr_in6);
} else {
/* Expect IPV4 address, skip to the next */
continue;
}
break;
#endif
case AF_INET:
((struct sockaddr_in *)sa)->sin_port = htons(port);
socklen = sizeof(struct sockaddr_in);
if (bindto && (strchr(bindto, ':') || !strcmp(bindto, "0"))) {
/* IPV4 sock can not bind to IPV6 address */
bindto = NULL;
}
break;
default:
/* Unsupported family, skip to the next */
continue;
}
/* create a socket for this address */
sock = socket(sa->sa_family, socktype, 0);
if (sock == SOCK_ERR) {
continue;
}
/* make a connection attempt */
if (bindto) {
union {
struct sockaddr common;
struct sockaddr_in in4;
#if HAVE_IPV6 && HAVE_INET_PTON
struct sockaddr_in6 in6;
#endif
} local_address = {0};
int local_address_len = 0;
if (sa->sa_family == AF_INET) {
#ifdef HAVE_INET_PTON
if (inet_pton(AF_INET, bindto, &local_address.in4.sin_addr) == 1) {
#else
if (inet_aton(bindto, &local_address.in4.sin_addr)) {
#endif
local_address_len = sizeof(struct sockaddr_in);
local_address.in4.sin_family = sa->sa_family;
local_address.in4.sin_port = htons(bindport);
}
}
#if HAVE_IPV6 && HAVE_INET_PTON
else { /* IPV6 */
if (inet_pton(AF_INET6, bindto, &local_address.in6.sin6_addr) == 1) {
local_address_len = sizeof(struct sockaddr_in6);
local_address.in6.sin6_family = sa->sa_family;
local_address.in6.sin6_port = htons(bindport);
}
}
#endif
#ifdef IP_BIND_ADDRESS_NO_PORT
{
int val = 1;
(void) setsockopt(sock, SOL_IP, IP_BIND_ADDRESS_NO_PORT, &val, sizeof(val));
}
#endif
if (local_address_len == 0) {
php_error_docref(NULL, E_WARNING, "Invalid IP Address: %s", bindto);
} else if (bind(sock, &local_address.common, local_address_len)) {
php_error_docref(NULL, E_WARNING, "Failed to bind to '%s:%d', system said: %s", bindto, bindport, strerror(errno));
}
}
/* free error string received during previous iteration (if any) */
if (error_string && *error_string) {
zend_string_release_ex(*error_string, 0);
*error_string = NULL;
}
#ifdef SO_BROADCAST
{
int val = 1;
if (sockopts & STREAM_SOCKOP_SO_BROADCAST) {
setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char*)&val, sizeof(val));
}
}
#endif
#ifdef TCP_NODELAY
{
int val = 1;
if (sockopts & STREAM_SOCKOP_TCP_NODELAY) {
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char*)&val, sizeof(val));
}
}
#endif
n = php_network_connect_socket(sock, sa, socklen, asynchronous,
timeout ? &working_timeout : NULL,
error_string, error_code);
if (n != -1) {
goto connected;
}
/* adjust timeout for next attempt */
#if HAVE_GETTIMEOFDAY
if (timeout) {
gettimeofday(&time_now, NULL);
if (!timercmp(&time_now, &limit_time, <)) {
/* time limit expired; don't attempt any further connections */
fatal = 1;
} else {
/* work out remaining time */
sub_times(limit_time, time_now, &working_timeout);
}
}
#else
if (error_code && *error_code == PHP_TIMEOUT_ERROR_VALUE) {
/* Don't even bother trying to connect to the next alternative;
* we have no way to determine how long we have already taken
* and it is quite likely that the next attempt will fail too. */
fatal = 1;
} else {
/* re-use the same initial timeout.
* Not the best thing, but in practice it should be good-enough */
if (timeout) {
memcpy(&working_timeout, timeout, sizeof(working_timeout));
}
}
#endif
closesocket(sock);
}
sock = -1;
connected:
php_network_freeaddresses(psal);