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jbsockets.c
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jbsockets.c
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const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.114 2012/03/09 17:56:41 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/jbsockets.c,v $
*
* Purpose : Contains wrappers for system-specific sockets code,
* so that the rest of Junkbuster can be more
* OS-independent. Contains #ifdefs to make this work
* on many platforms.
*
* Copyright : Written by and Copyright (C) 2001-2011 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
* Junkbusters Corporation. http://www.junkbusters.com
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program 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 General Public
* License for more details.
*
* The GNU General Public License should be included with
* this file. If not, you can view it at
* http://www.gnu.org/copyleft/gpl.html
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*********************************************************************/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#ifdef _WIN32
#ifndef STRICT
#define STRICT
#endif
#include <windows.h>
#include <sys/timeb.h>
#include <io.h>
#else
#ifndef __OS2__
#include <unistd.h>
#endif
#include <sys/time.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <netdb.h>
#include <sys/socket.h>
#ifndef __BEOS__
#include <netinet/tcp.h>
#ifndef __OS2__
#include <arpa/inet.h>
#endif
#else
#include <socket.h>
#endif
#if defined(__EMX__) || defined (__OS2__)
#include <sys/select.h> /* OS/2/EMX needs a little help with select */
#ifdef __OS2__
#include <nerrno.h>
#endif
#endif
#endif
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
#ifdef HAVE_POLL
#ifdef __GLIBC__
#include <sys/poll.h>
#else
#include <poll.h>
#endif /* def __GLIBC__ */
#endif /* HAVE_POLL */
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
#include "project.h"
/* For mutex semaphores only */
#include "jcc.h"
#include "jbsockets.h"
#include "filters.h"
#include "errlog.h"
/* Mac OSX doesn't define AI_NUMERICSESRV */
#ifndef AI_NUMERICSERV
#define AI_NUMERICSERV 0
#endif
const char jbsockets_h_rcs[] = JBSOCKETS_H_VERSION;
/*
* Maximum number of gethostbyname(_r) retries in case of
* soft errors (TRY_AGAIN).
* XXX: Does it make sense to make this a config option?
*/
#define MAX_DNS_RETRIES 10
#define MAX_LISTEN_BACKLOG 128
#ifdef HAVE_RFC2553
static jb_socket rfc2553_connect_to(const char *host, int portnum, struct client_state *csp);
#else
static jb_socket no_rfc2553_connect_to(const char *host, int portnum, struct client_state *csp);
#endif
/*********************************************************************
*
* Function : connect_to
*
* Description : Open a socket and connect to it. Will check
* that this is allowed according to ACL.
*
* Parameters :
* 1 : host = hostname to connect to
* 2 : portnum = port to connent on (XXX: should be unsigned)
* 3 : csp = Current client state (buffers, headers, etc...)
*
* Returns : JB_INVALID_SOCKET => failure, else it is the socket
* file descriptor.
*
*********************************************************************/
jb_socket connect_to(const char *host, int portnum, struct client_state *csp)
{
jb_socket fd;
int forwarded_connect_retries = 0;
do
{
/*
* XXX: The whole errno overloading is ridiculous and should
* be replaced with something sane and thread safe
*/
/* errno = 0;*/
#ifdef HAVE_RFC2553
fd = rfc2553_connect_to(host, portnum, csp);
#else
fd = no_rfc2553_connect_to(host, portnum, csp);
#endif
if ((fd != JB_INVALID_SOCKET) || (errno == EINVAL)
|| (csp->fwd == NULL)
|| ((csp->fwd->forward_host == NULL) && (csp->fwd->type == SOCKS_NONE)))
{
break;
}
forwarded_connect_retries++;
if (csp->config->forwarded_connect_retries != 0)
{
log_error(LOG_LEVEL_ERROR,
"Attempt %d of %d to connect to %s failed. Trying again.",
forwarded_connect_retries, csp->config->forwarded_connect_retries + 1, host);
}
} while (forwarded_connect_retries < csp->config->forwarded_connect_retries);
return fd;
}
#ifdef HAVE_RFC2553
/* Getaddrinfo implementation */
static jb_socket rfc2553_connect_to(const char *host, int portnum, struct client_state *csp)
{
struct addrinfo hints, *result, *rp;
char service[6];
int retval;
jb_socket fd;
fd_set wfds;
struct timeval timeout;
#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
int flags;
#endif
int connect_failed;
/*
* XXX: Initializeing it here is only necessary
* because not all situations are properly
* covered yet.
*/
int socket_error = 0;
#ifdef FEATURE_ACL
struct access_control_addr dst[1];
#endif /* def FEATURE_ACL */
/* Don't leak memory when retrying. */
freez(csp->error_message);
freez(csp->http->host_ip_addr_str);
retval = snprintf(service, sizeof(service), "%d", portnum);
if ((-1 == retval) || (sizeof(service) <= retval))
{
log_error(LOG_LEVEL_ERROR,
"Port number (%d) ASCII decimal representation doesn't fit into 6 bytes",
portnum);
csp->error_message = strdup("Invalid port number");
csp->http->host_ip_addr_str = strdup("unknown");
return(JB_INVALID_SOCKET);
}
memset((char *)&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_NUMERICSERV; /* avoid service look-up */
#ifdef AI_ADDRCONFIG
hints.ai_flags |= AI_ADDRCONFIG;
#endif
if ((retval = getaddrinfo(host, service, &hints, &result)))
{
log_error(LOG_LEVEL_INFO,
"Can not resolve %s: %s", host, gai_strerror(retval));
/* XXX: Should find a better way to propagate this error. */
errno = EINVAL;
csp->error_message = strdup(gai_strerror(retval));
csp->http->host_ip_addr_str = strdup("unknown");
return(JB_INVALID_SOCKET);
}
csp->http->host_ip_addr_str = malloc(NI_MAXHOST);
if (NULL == csp->http->host_ip_addr_str)
{
freeaddrinfo(result);
log_error(LOG_LEVEL_ERROR,
"Out of memory while getting the server IP address.");
return JB_INVALID_SOCKET;
}
for (rp = result; rp != NULL; rp = rp->ai_next)
{
#ifdef FEATURE_ACL
memcpy(&dst->addr, rp->ai_addr, rp->ai_addrlen);
if (block_acl(dst, csp))
{
#ifdef __OS2__
socket_error = errno = SOCEPERM;
#else
socket_error = errno = EPERM;
#endif
continue;
}
#endif /* def FEATURE_ACL */
retval = getnameinfo(rp->ai_addr, rp->ai_addrlen,
csp->http->host_ip_addr_str, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if (retval)
{
log_error(LOG_LEVEL_ERROR,
"Failed to get the host name from the socket structure: %s",
gai_strerror(retval));
continue;
}
fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
#ifdef _WIN32
if (fd == JB_INVALID_SOCKET)
#else
if (fd < 0)
#endif
{
continue;
}
#ifdef TCP_NODELAY
{ /* turn off TCP coalescence */
int mi = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &mi, sizeof (int));
}
#endif /* def TCP_NODELAY */
#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
if ((flags = fcntl(fd, F_GETFL, 0)) != -1)
{
flags |= O_NDELAY;
fcntl(fd, F_SETFL, flags);
}
#endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
connect_failed = 0;
while (connect(fd, rp->ai_addr, rp->ai_addrlen) == JB_INVALID_SOCKET)
{
#ifdef __OS2__
errno = sock_errno();
#endif /* __OS2__ */
#ifdef _WIN32
if (errno == WSAEINPROGRESS)
#else /* ifndef _WIN32 */
if (errno == EINPROGRESS)
#endif /* ndef _WIN32 || __OS2__ */
{
break;
}
if (errno != EINTR)
{
socket_error = errno;
close_socket(fd);
connect_failed = 1;
break;
}
}
if (connect_failed)
{
continue;
}
#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
if (flags != -1)
{
flags &= ~O_NDELAY;
fcntl(fd, F_SETFL, flags);
}
#endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
/* wait for connection to complete */
FD_ZERO(&wfds);
FD_SET(fd, &wfds);
memset(&timeout, 0, sizeof(timeout));
timeout.tv_sec = 30;
/* MS Windows uses int, not SOCKET, for the 1st arg of select(). Weird! */
if ((select((int)fd + 1, NULL, &wfds, NULL, &timeout) > 0)
&& FD_ISSET(fd, &wfds))
{
socklen_t optlen = sizeof(socket_error);
if (!getsockopt(fd, SOL_SOCKET, SO_ERROR, &socket_error, &optlen))
{
if (!socket_error)
{
/* Connection established, no need to try other addresses. */
break;
}
if (rp->ai_next != NULL)
{
/*
* There's another address we can try, so log that this
* one didn't work out. If the last one fails, too,
* it will get logged outside the loop body so we don't
* have to mention it here.
*/
log_error(LOG_LEVEL_CONNECT, "Could not connect to [%s]:%s: %s.",
csp->http->host_ip_addr_str, service, strerror(socket_error));
}
}
else
{
socket_error = errno;
log_error(LOG_LEVEL_ERROR, "Could not get the state of "
"the connection to [%s]:%s: %s; dropping connection.",
csp->http->host_ip_addr_str, service, strerror(errno));
}
}
/* Connection failed, try next address */
close_socket(fd);
}
freeaddrinfo(result);
if (!rp)
{
log_error(LOG_LEVEL_CONNECT, "Could not connect to [%s]:%s: %s.",
host, service, strerror(socket_error));
csp->error_message = strdup(strerror(socket_error));
return(JB_INVALID_SOCKET);
}
log_error(LOG_LEVEL_CONNECT, "Connected to %s[%s]:%s.",
host, csp->http->host_ip_addr_str, service);
return(fd);
}
#else /* ndef HAVE_RFC2553 */
/* Pre-getaddrinfo implementation */
static jb_socket no_rfc2553_connect_to(const char *host, int portnum, struct client_state *csp)
{
struct sockaddr_in inaddr;
jb_socket fd;
unsigned int addr;
fd_set wfds;
struct timeval tv[1];
#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
int flags;
#endif
#ifdef FEATURE_ACL
struct access_control_addr dst[1];
#endif /* def FEATURE_ACL */
/* Don't leak memory when retrying. */
freez(csp->http->host_ip_addr_str);
memset((char *)&inaddr, 0, sizeof inaddr);
if ((addr = resolve_hostname_to_ip(host)) == INADDR_NONE)
{
csp->http->host_ip_addr_str = strdup("unknown");
return(JB_INVALID_SOCKET);
}
#ifdef FEATURE_ACL
dst->addr = ntohl(addr);
dst->port = portnum;
if (block_acl(dst, csp))
{
#ifdef __OS2__
errno = SOCEPERM;
#else
errno = EPERM;
#endif
return(JB_INVALID_SOCKET);
}
#endif /* def FEATURE_ACL */
inaddr.sin_addr.s_addr = addr;
inaddr.sin_family = AF_INET;
csp->http->host_ip_addr_str = strdup(inet_ntoa(inaddr.sin_addr));
#ifndef _WIN32
if (sizeof(inaddr.sin_port) == sizeof(short))
#endif /* ndef _WIN32 */
{
inaddr.sin_port = htons((unsigned short) portnum);
}
#ifndef _WIN32
else
{
inaddr.sin_port = htonl((unsigned long)portnum);
}
#endif /* ndef _WIN32 */
fd = socket(inaddr.sin_family, SOCK_STREAM, 0);
#ifdef _WIN32
if (fd == JB_INVALID_SOCKET)
#else
if (fd < 0)
#endif
{
return(JB_INVALID_SOCKET);
}
#ifdef TCP_NODELAY
{ /* turn off TCP coalescence */
int mi = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &mi, sizeof (int));
}
#endif /* def TCP_NODELAY */
#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
if ((flags = fcntl(fd, F_GETFL, 0)) != -1)
{
flags |= O_NDELAY;
fcntl(fd, F_SETFL, flags);
}
#endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
while (connect(fd, (struct sockaddr *) & inaddr, sizeof inaddr) == JB_INVALID_SOCKET)
{
#ifdef _WIN32
if (errno == WSAEINPROGRESS)
#elif __OS2__
if (sock_errno() == EINPROGRESS)
#else /* ifndef _WIN32 */
if (errno == EINPROGRESS)
#endif /* ndef _WIN32 || __OS2__ */
{
break;
}
#ifdef __OS2__
if (sock_errno() != EINTR)
#else
if (errno != EINTR)
#endif /* __OS2__ */
{
close_socket(fd);
return(JB_INVALID_SOCKET);
}
}
#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
if (flags != -1)
{
flags &= ~O_NDELAY;
fcntl(fd, F_SETFL, flags);
}
#endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) */
/* wait for connection to complete */
FD_ZERO(&wfds);
FD_SET(fd, &wfds);
tv->tv_sec = 30;
tv->tv_usec = 0;
/* MS Windows uses int, not SOCKET, for the 1st arg of select(). Weird! */
if (select((int)fd + 1, NULL, &wfds, NULL, tv) <= 0)
{
close_socket(fd);
return(JB_INVALID_SOCKET);
}
return(fd);
}
#endif /* ndef HAVE_RFC2553 */
/*********************************************************************
*
* Function : write_socket
*
* Description : Write the contents of buf (for n bytes) to socket fd.
*
* Parameters :
* 1 : fd = file descriptor (aka. handle) of socket to write to.
* 2 : buf = pointer to data to be written.
* 3 : len = length of data to be written to the socket "fd".
*
* Returns : 0 on success (entire buffer sent).
* nonzero on error.
*
*********************************************************************/
#ifdef AMIGA
int write_socket(jb_socket fd, const char *buf, ssize_t len)
#else
int write_socket(jb_socket fd, const char *buf, size_t len)
#endif
{
if (len == 0)
{
return 0;
}
log_error(LOG_LEVEL_WRITING, "to socket %d: %N", fd, len, buf);
#if defined(_WIN32)
return (send(fd, buf, (int)len, 0) != (int)len);
#elif defined(__BEOS__) || defined(AMIGA)
return (send(fd, buf, len, 0) != len);
#elif defined(__OS2__)
/*
* Break the data up into SOCKET_SEND_MAX chunks for sending...
* OS/2 seemed to complain when the chunks were too large.
*/
#define SOCKET_SEND_MAX 65000
{
int send_len, send_rc = 0, i = 0;
while ((i < len) && (send_rc != -1))
{
if ((i + SOCKET_SEND_MAX) > len)
send_len = len - i;
else
send_len = SOCKET_SEND_MAX;
send_rc = send(fd,(char*)buf + i, send_len, 0);
if (send_rc == -1)
return 1;
i = i + send_len;
}
return 0;
}
#else
return (write(fd, buf, len) != len);
#endif
}
/*********************************************************************
*
* Function : read_socket
*
* Description : Read from a TCP/IP socket in a platform independent way.
*
* Parameters :
* 1 : fd = file descriptor of the socket to read
* 2 : buf = pointer to buffer where data will be written
* Must be >= len bytes long.
* 3 : len = maximum number of bytes to read
*
* Returns : On success, the number of bytes read is returned (zero
* indicates end of file), and the file position is advanced
* by this number. It is not an error if this number is
* smaller than the number of bytes requested; this may hap-
* pen for example because fewer bytes are actually available
* right now (maybe because we were close to end-of-file, or
* because we are reading from a pipe, or from a terminal,
* or because read() was interrupted by a signal). On error,
* -1 is returned, and errno is set appropriately. In this
* case it is left unspecified whether the file position (if
* any) changes.
*
*********************************************************************/
int read_socket(jb_socket fd, char *buf, int len)
{
int ret;
if (len <= 0)
{
return(0);
}
#if defined(_WIN32)
ret = recv(fd, buf, len, 0);
#elif defined(__BEOS__) || defined(AMIGA) || defined(__OS2__)
ret = recv(fd, buf, (size_t)len, 0);
#else
ret = (int)read(fd, buf, (size_t)len);
#endif
if (ret > 0)
{
log_error(LOG_LEVEL_RECEIVED, "from socket %d: %N", fd, ret, buf);
}
return ret;
}
/*********************************************************************
*
* Function : data_is_available
*
* Description : Waits for data to arrive on a socket.
*
* Parameters :
* 1 : fd = file descriptor of the socket to read
* 2 : seconds_to_wait = number of seconds after which we give up.
*
* Returns : TRUE if data arrived in time,
* FALSE otherwise.
*
*********************************************************************/
int data_is_available(jb_socket fd, int seconds_to_wait)
{
char buf[10];
fd_set rfds;
struct timeval timeout;
int n;
memset(&timeout, 0, sizeof(timeout));
timeout.tv_sec = seconds_to_wait;
#ifdef __OS2__
/* Copy and pasted from jcc.c ... */
memset(&rfds, 0, sizeof(fd_set));
#else
FD_ZERO(&rfds);
#endif
FD_SET(fd, &rfds);
n = select(fd+1, &rfds, NULL, NULL, &timeout);
/*
* XXX: Do we care about the different error conditions?
*/
return ((n == 1) && (1 == recv(fd, buf, 1, MSG_PEEK)));
}
/*********************************************************************
*
* Function : close_socket
*
* Description : Closes a TCP/IP socket
*
* Parameters :
* 1 : fd = file descriptor of socket to be closed
*
* Returns : void
*
*********************************************************************/
void close_socket(jb_socket fd)
{
#if defined(_WIN32) || defined(__BEOS__)
closesocket(fd);
#elif defined(AMIGA)
CloseSocket(fd);
#elif defined(__OS2__)
soclose(fd);
#else
close(fd);
#endif
}
/*********************************************************************
*
* Function : bind_port
*
* Description : Call socket, set socket options, and listen.
* Called by listen_loop to "boot up" our proxy address.
*
* Parameters :
* 1 : hostnam = TCP/IP address to bind/listen to
* 2 : portnum = port to listen on
* 3 : pfd = pointer used to return file descriptor.
*
* Returns : if success, returns 0 and sets *pfd.
* if failure, returns -3 if address is in use,
* -2 if address unresolvable,
* -1 otherwise
*********************************************************************/
int bind_port(const char *hostnam, int portnum, jb_socket *pfd)
{
#ifdef HAVE_RFC2553
struct addrinfo hints;
struct addrinfo *result, *rp;
/*
* XXX: portnum should be a string to allow symbolic service
* names in the configuration file and to avoid the following
* int2string.
*/
char servnam[6];
int retval;
#else
struct sockaddr_in inaddr;
#endif /* def HAVE_RFC2553 */
jb_socket fd;
#ifndef _WIN32
int one = 1;
#endif /* ndef _WIN32 */
*pfd = JB_INVALID_SOCKET;
#ifdef HAVE_RFC2553
retval = snprintf(servnam, sizeof(servnam), "%d", portnum);
if ((-1 == retval) || (sizeof(servnam) <= retval))
{
log_error(LOG_LEVEL_ERROR,
"Port number (%d) ASCII decimal representation doesn't fit into 6 bytes",
portnum);
return -1;
}
memset(&hints, 0, sizeof(struct addrinfo));
if (hostnam == NULL)
{
/*
* XXX: This is a hack. The right thing to do
* would be to bind to both AF_INET and AF_INET6.
* This will also fail if there is no AF_INET
* version available.
*/
hints.ai_family = AF_INET;
}
else
{
hints.ai_family = AF_UNSPEC;
}
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
hints.ai_protocol = 0; /* Really any stream protocol or TCP only */
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
if ((retval = getaddrinfo(hostnam, servnam, &hints, &result)))
{
log_error(LOG_LEVEL_ERROR,
"Can not resolve %s: %s", hostnam, gai_strerror(retval));
return -2;
}
#else
memset((char *)&inaddr, '\0', sizeof inaddr);
inaddr.sin_family = AF_INET;
inaddr.sin_addr.s_addr = resolve_hostname_to_ip(hostnam);
if (inaddr.sin_addr.s_addr == INADDR_NONE)
{
return(-2);
}
#ifndef _WIN32
if (sizeof(inaddr.sin_port) == sizeof(short))
#endif /* ndef _WIN32 */
{
inaddr.sin_port = htons((unsigned short) portnum);
}
#ifndef _WIN32
else
{
inaddr.sin_port = htonl((unsigned long) portnum);
}
#endif /* ndef _WIN32 */
#endif /* def HAVE_RFC2553 */
#ifdef HAVE_RFC2553
for (rp = result; rp != NULL; rp = rp->ai_next)
{
fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
#else
fd = socket(AF_INET, SOCK_STREAM, 0);
#endif /* def HAVE_RFC2553 */
#ifdef _WIN32
if (fd == JB_INVALID_SOCKET)
#else
if (fd < 0)
#endif
{
#ifdef HAVE_RFC2553
continue;
#else
return(-1);
#endif
}
#ifndef _WIN32
/*
* This is not needed for Win32 - in fact, it stops
* duplicate instances of Privoxy from being caught.
*
* On UNIX, we assume the user is sensible enough not
* to start Privoxy multiple times on the same IP.
* Without this, stopping and restarting Privoxy
* from a script fails.
* Note: SO_REUSEADDR is meant to only take over
* sockets which are *not* in listen state in Linux,
* e.g. sockets in TIME_WAIT. YMMV.
*/
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
#endif /* ndef _WIN32 */
#ifdef HAVE_RFC2553
if (bind(fd, rp->ai_addr, rp->ai_addrlen) < 0)
#else
if (bind(fd, (struct sockaddr *)&inaddr, sizeof(inaddr)) < 0)
#endif
{
#ifdef _WIN32
errno = WSAGetLastError();
if (errno == WSAEADDRINUSE)
#else
if (errno == EADDRINUSE)
#endif
{
#ifdef HAVE_RFC2553
freeaddrinfo(result);
#endif
close_socket(fd);
return(-3);
}
else
{
close_socket(fd);
#ifndef HAVE_RFC2553
return(-1);
}
}
#else
}
}
else
{
/* bind() succeeded, escape from for-loop */
/*
* XXX: Support multiple listening sockets (e.g. localhost
* resolves to AF_INET and AF_INET6, but only the first address
* is used
*/
break;
}
}
freeaddrinfo(result);
if (rp == NULL)
{
/* All bind()s failed */
return(-1);
}
#endif /* ndef HAVE_RFC2553 */
while (listen(fd, MAX_LISTEN_BACKLOG) == -1)
{
if (errno != EINTR)
{
return(-1);
}
}
*pfd = fd;
return 0;
}
/*********************************************************************
*
* Function : get_host_information
*
* Description : Determines the IP address the client used to
* reach us and the hostname associated with it.
*
* XXX: Most of the code has been copy and pasted
* from accept_connection() and not all of the
* ifdefs paths have been tested afterwards.
*
* Parameters :
* 1 : afd = File descriptor returned from accept().
* 2 : ip_address = Pointer to return the pointer to
* the ip address string.
* 3 : port = Pointer to return the pointer to
* the TCP port string.
* 4 : hostname = Pointer to return the pointer to
* the hostname or NULL if the caller
* isn't interested in it.
*
* Returns : void.
*
*********************************************************************/
void get_host_information(jb_socket afd, char **ip_address, char **port,
char **hostname)
{
#ifdef HAVE_RFC2553
struct sockaddr_storage server;
int retval;
#else
struct sockaddr_in server;
struct hostent *host = NULL;
#endif /* HAVE_RFC2553 */
#if defined(_WIN32) || defined(__OS2__) || defined(__APPLE_CC__) || defined(AMIGA)
/* according to accept_connection() this fixes a warning. */
int s_length, s_length_provided;
#else
socklen_t s_length, s_length_provided;
#endif
#ifndef HAVE_RFC2553
#if defined(HAVE_GETHOSTBYADDR_R_8_ARGS) || defined(HAVE_GETHOSTBYADDR_R_7_ARGS) || defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
struct hostent result;
#if defined(HAVE_GETHOSTBYADDR_R_5_ARGS)
struct hostent_data hdata;
#else
char hbuf[HOSTENT_BUFFER_SIZE];
int thd_err;
#endif /* def HAVE_GETHOSTBYADDR_R_5_ARGS */
#endif /* def HAVE_GETHOSTBYADDR_R_(8|7|5)_ARGS */
#endif /* ifndef HAVE_RFC2553 */
s_length = s_length_provided = sizeof(server);
if (NULL != hostname)
{
*hostname = NULL;
}
*ip_address = NULL;
*port = NULL;
if (!getsockname(afd, (struct sockaddr *) &server, &s_length))
{
if (s_length > s_length_provided)
{
log_error(LOG_LEVEL_ERROR, "getsockname() truncated server address");
return;
}
/*
* XXX: Workaround for missing header on Windows when
* configured with --disable-ipv6-support.
* The proper fix is to not use NI_MAXSERV in
* that case. It works by accident on other platforms
* as <netdb.h> in included unconditionally there.
*/
#ifndef NI_MAXSERV
#define NI_MAXSERV 32
#endif
*port = malloc(NI_MAXSERV);
if (NULL == *port)
{
log_error(LOG_LEVEL_ERROR,
"Out of memory while getting the client's port.");
return;
}
#ifdef HAVE_RFC2553
*ip_address = malloc(NI_MAXHOST);
if (NULL == *ip_address)
{
log_error(LOG_LEVEL_ERROR,