void
cupsdUpdateEnv(void)
{
/*
* Set common variables...
*/
#define set_if_undefined(name,value) if (find_env(name) < 0) cupsdSetEnv(name,value)
set_if_undefined("CUPS_CACHEDIR", CacheDir);
set_if_undefined("CUPS_DATADIR", DataDir);
set_if_undefined("CUPS_DOCROOT", DocumentRoot);
set_if_undefined("CUPS_FONTPATH", FontPath);
set_if_undefined("CUPS_REQUESTROOT", RequestRoot);
set_if_undefined("CUPS_SERVERBIN", ServerBin);
set_if_undefined("CUPS_SERVERROOT", ServerRoot);
set_if_undefined("CUPS_STATEDIR", StateDir);
set_if_undefined("DYLD_INSERT_LIBRARIES", NULL);
set_if_undefined("DYLD_LIBRARY_PATH", NULL);
set_if_undefined("HOME", TempDir);
set_if_undefined("LD_ASSUME_KERNEL", NULL);
set_if_undefined("LD_LIBRARY_PATH", NULL);
set_if_undefined("LD_PRELOAD", NULL);
set_if_undefined("NLSPATH", NULL);
if (find_env("PATH") < 0)
cupsdSetEnvf("PATH", "%s/filter:" CUPS_BINDIR ":" CUPS_SBINDIR
":/bin:/usr/bin", ServerBin);
set_if_undefined("SERVER_ADMIN", ServerAdmin);
set_if_undefined("SHLIB_PATH", NULL);
set_if_undefined("SOFTWARE", CUPS_MINIMAL);
set_if_undefined("TMPDIR", TempDir);
set_if_undefined("TZ", NULL);
set_if_undefined("USER", "root");
set_if_undefined("VG_ARGS", NULL);
cupsdSetEnvf("CUPS_MAX_MESSAGE", "%d", CUPSD_SB_BUFFER_SIZE - 1);
}
void
cupsdStartListening(void)
{
int p; /* Port number */
cupsd_listener_t *lis; /* Current listening socket */
char s[256]; /* String addresss */
const char *have_domain; /* Have a domain socket? */
static const char * const encryptions[] =
{ /* Encryption values */
"IfRequested",
"Never",
"Required",
"Always"
};
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartListening: %d Listeners",
cupsArrayCount(Listeners));
/*
* Setup socket listeners...
*/
for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners), LocalPort = 0,
have_domain = NULL;
lis;
lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
{
httpAddrString(&(lis->address), s, sizeof(s));
p = httpAddrPort(&(lis->address));
/*
* If needed, create a socket for listening...
*/
if (lis->fd == -1)
{
/*
* Create a socket for listening...
*/
lis->fd = httpAddrListen(&(lis->address), p);
if (lis->fd == -1)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to open listen socket for address %s:%d - %s.",
s, p, strerror(errno));
#ifdef AF_INET6
/*
* IPv6 is often disabled while DNS returns IPv6 addresses...
*/
if (lis->address.addr.sa_family != AF_INET6 &&
(FatalErrors & CUPSD_FATAL_LISTEN))
cupsdEndProcess(getpid(), 0);
#else
if (FatalErrors & CUPSD_FATAL_LISTEN)
cupsdEndProcess(getpid(), 0);
#endif /* AF_INET6 */
continue;
}
}
if (p)
cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s:%d on fd %d...",
s, p, lis->fd);
else
cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s on fd %d...",
s, lis->fd);
/*
* Save the first port that is bound to the local loopback or
* "any" address...
*/
if ((!LocalPort || LocalEncryption == HTTP_ENCRYPT_ALWAYS) && p > 0 &&
(httpAddrLocalhost(&(lis->address)) ||
httpAddrAny(&(lis->address))))
{
LocalPort = p;
LocalEncryption = lis->encryption;
}
#ifdef AF_LOCAL
if (lis->address.addr.sa_family == AF_LOCAL && !have_domain)
have_domain = lis->address.un.sun_path;
#endif /* AF_LOCAL */
}
/*
* Make sure that we are listening on localhost!
*/
if (!LocalPort && !have_domain)
{
cupsdLogMessage(CUPSD_LOG_EMERG,
"No Listen or Port lines were found to allow access via "
"localhost.");
if (FatalErrors & (CUPSD_FATAL_CONFIG | CUPSD_FATAL_LISTEN))
cupsdEndProcess(getpid(), 0);
}
/*
* Set the CUPS_SERVER, IPP_PORT, and CUPS_ENCRYPTION variables based on
* the listeners...
*/
if (have_domain)
{
/*
* Use domain sockets for the local connection...
*/
cupsdSetEnv("CUPS_SERVER", have_domain);
LocalEncryption = HTTP_ENCRYPT_IF_REQUESTED;
}
else
{
/*
* Use the default local loopback address for the server...
*/
cupsdSetEnv("CUPS_SERVER", "localhost");
}
cupsdSetEnv("CUPS_ENCRYPTION", encryptions[LocalEncryption]);
if (LocalPort)
cupsdSetEnvf("IPP_PORT", "%d", LocalPort);
/*
* Resume listening for connections...
*/
cupsdResumeListening();
}
void
cupsdStartListening(void)
{
int status; /* Bind result */
int p, /* Port number */
val; /* Parameter value */
cupsd_listener_t *lis; /* Current listening socket */
char s[256]; /* String addresss */
const char *have_domain; /* Have a domain socket? */
static const char * const encryptions[] =
{ /* Encryption values */
"IfRequested",
"Never",
"Required",
"Always"
};
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartListening: %d Listeners",
cupsArrayCount(Listeners));
/*
* Setup socket listeners...
*/
for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners), LocalPort = 0,
have_domain = NULL;
lis;
lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
{
httpAddrString(&(lis->address), s, sizeof(s));
p = httpAddrPort(&(lis->address));
/*
* If needed, create a socket for listening...
*/
if (lis->fd == -1)
{
/*
* Create a socket for listening...
*/
lis->fd = socket(lis->address.addr.sa_family, SOCK_STREAM, 0);
if (lis->fd == -1)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to open listen socket for address %s:%d - %s.",
s, p, strerror(errno));
#ifdef AF_INET6
/*
* IPv6 is often disabled while DNS returns IPv6 addresses...
*/
if (lis->address.addr.sa_family != AF_INET6 &&
(FatalErrors & CUPSD_FATAL_LISTEN))
cupsdEndProcess(getpid(), 0);
#else
if (FatalErrors & CUPSD_FATAL_LISTEN)
cupsdEndProcess(getpid(), 0);
#endif /* AF_INET6 */
continue;
}
/*
* Set things up to reuse the local address for this port.
*/
val = 1;
#ifdef __sun
setsockopt(lis->fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
#else
setsockopt(lis->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
#endif /* __sun */
/*
* Bind to the port we found...
*/
#ifdef AF_INET6
if (lis->address.addr.sa_family == AF_INET6)
{
# ifdef IPV6_V6ONLY
/*
* Accept only IPv6 connections on this socket, to avoid
* potential security issues and to make all platforms behave
* the same.
*/
val = 1;
# ifdef __sun
setsockopt(lis->fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&val, sizeof(val));
# else
setsockopt(lis->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
# endif /* __sun */
# endif /* IPV6_V6ONLY */
status = bind(lis->fd, (struct sockaddr *)&(lis->address),
httpAddrLength(&(lis->address)));
}
else
#endif /* AF_INET6 */
#ifdef AF_LOCAL
if (lis->address.addr.sa_family == AF_LOCAL)
{
mode_t mask; /* Umask setting */
/*
* Remove any existing domain socket file...
*/
unlink(lis->address.un.sun_path);
/*
* Save the current umask and set it to 0 so that all users can access
* the domain socket...
*/
mask = umask(0);
/*
* Bind the domain socket...
*/
status = bind(lis->fd, (struct sockaddr *)&(lis->address),
httpAddrLength(&(lis->address)));
/*
* Restore the umask...
*/
umask(mask);
}
else
#endif /* AF_LOCAL */
status = bind(lis->fd, (struct sockaddr *)&(lis->address),
sizeof(lis->address.ipv4));
if (status < 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to bind socket for address %s:%d - %s.",
s, p, strerror(errno));
close(lis->fd);
lis->fd = -1;
if (FatalErrors & CUPSD_FATAL_LISTEN)
cupsdEndProcess(getpid(), 0);
continue;
}
/*
* Listen for new clients.
*/
if (listen(lis->fd, ListenBackLog) < 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to listen for clients on address %s:%d - %s.",
s, p, strerror(errno));
close(lis->fd);
lis->fd = -1;
if (FatalErrors & CUPSD_FATAL_LISTEN)
cupsdEndProcess(getpid(), 0);
continue;
}
}
fcntl(lis->fd, F_SETFD, fcntl(lis->fd, F_GETFD) | FD_CLOEXEC);
if (p)
cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s:%d on fd %d...",
s, p, lis->fd);
else
{
cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s on fd %d...",
s, lis->fd);
if (chmod(s, 0140777))
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to change permisssions on domain socket "
"\"%s\" - %s", s, strerror(errno));
}
/*
* Save the first port that is bound to the local loopback or
* "any" address...
*/
if ((!LocalPort || LocalEncryption == HTTP_ENCRYPT_ALWAYS) && p > 0 &&
(httpAddrLocalhost(&(lis->address)) ||
httpAddrAny(&(lis->address))))
{
LocalPort = p;
LocalEncryption = lis->encryption;
}
#ifdef AF_LOCAL
if (lis->address.addr.sa_family == AF_LOCAL && !have_domain)
have_domain = lis->address.un.sun_path;
#endif /* AF_LOCAL */
}
/*
* Make sure that we are listening on localhost!
*/
if (!LocalPort && !have_domain)
{
cupsdLogMessage(CUPSD_LOG_EMERG,
"No Listen or Port lines were found to allow access via "
"localhost!");
if (FatalErrors & (CUPSD_FATAL_CONFIG | CUPSD_FATAL_LISTEN))
cupsdEndProcess(getpid(), 0);
}
/*
* Set the CUPS_SERVER, IPP_PORT, and CUPS_ENCRYPTION variables based on
* the listeners...
*/
if (have_domain)
{
/*
* Use domain sockets for the local connection...
*/
cupsdSetEnv("CUPS_SERVER", have_domain);
LocalEncryption = HTTP_ENCRYPT_IF_REQUESTED;
}
else
{
/*
* Use the default local loopback address for the server...
*/
cupsdSetEnv("CUPS_SERVER", "localhost");
}
cupsdSetEnv("CUPS_ENCRYPTION", encryptions[LocalEncryption]);
if (LocalPort)
cupsdSetEnvf("IPP_PORT", "%d", LocalPort);
/*
* Resume listening for connections...
*/
cupsdResumeListening();
}
