void
cupsdStopAllNotifiers(void)
{
cupsd_subscription_t *sub; /* Current subscription */
/*
* See if we have started any notifiers...
*/
if (!NotifierStatusBuffer)
return;
/*
* Yes, kill any processes that are left...
*/
for (sub = (cupsd_subscription_t *)cupsArrayFirst(Subscriptions);
sub;
sub = (cupsd_subscription_t *)cupsArrayNext(Subscriptions))
if (sub->pid)
{
cupsdEndProcess(sub->pid, 0);
close(sub->pipe);
sub->pipe = -1;
}
/*
* Close the status pipes...
*/
if (NotifierPipes[0] >= 0)
{
cupsdRemoveSelect(NotifierPipes[0]);
cupsdStatBufDelete(NotifierStatusBuffer);
close(NotifierPipes[0]);
close(NotifierPipes[1]);
NotifierPipes[0] = -1;
NotifierPipes[1] = -1;
NotifierStatusBuffer = NULL;
}
}
static void
dnssdClientCallback(
AvahiClient *c, /* I - Client */
AvahiClientState state, /* I - Current state */
void *userdata) /* I - User data (unused) */
{
int error; /* Error code, if any */
(void)userdata;
if (!c)
return;
/*
* Make sure DNSSDClient is already set also if this callback function is
* already running before avahi_client_new() in dnssdStartBrowsing()
* finishes.
*/
if (!DNSSDClient)
DNSSDClient = c;
switch (state)
{
case AVAHI_CLIENT_S_REGISTERING:
case AVAHI_CLIENT_S_RUNNING:
case AVAHI_CLIENT_S_COLLISION:
cupsdLogMessage(CUPSD_LOG_DEBUG, "Avahi server connection now available, registering printers for Bonjour broadcasting.");
/*
* Mark that Avahi server is running...
*/
avahi_running = 1;
/*
* Set the computer name and register the web interface...
*/
DNSSDPort = 0;
dnssdUpdateDNSSDName(1);
/*
* Register the individual printers
*/
dnssdRegisterAllPrinters(1);
break;
case AVAHI_CLIENT_FAILURE:
if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED)
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "Avahi server disappeared, unregistering printers for Bonjour broadcasting.");
/*
* Unregister everything and close the client...
*/
dnssdDeregisterAllPrinters(1);
dnssdDeregisterInstance(&WebIFSrv, 1);
avahi_client_free(DNSSDClient);
DNSSDClient = NULL;
/*
* Mark that Avahi server is not running...
*/
avahi_running = 0;
/*
* Renew Avahi client...
*/
DNSSDClient = avahi_client_new(avahi_threaded_poll_get(DNSSDMaster), AVAHI_CLIENT_NO_FAIL, dnssdClientCallback, NULL, &error);
if (!DNSSDClient)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to communicate with avahi-daemon: %s", dnssdErrorString(error));
if (FatalErrors & CUPSD_FATAL_BROWSE)
cupsdEndProcess(getpid(), 0);
}
}
else
{
cupsdLogMessage(CUPSD_LOG_ERROR, "Communication with avahi-daemon has failed: %s", avahi_strerror(avahi_client_errno(c)));
if (FatalErrors & CUPSD_FATAL_BROWSE)
cupsdEndProcess(getpid(), 0);
}
break;
default:
break;
}
}
void
cupsdStartBrowsing(void)
{
if (!Browsing || !BrowseLocalProtocols)
return;
#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
if (BrowseLocalProtocols & BROWSE_DNSSD)
{
# ifdef HAVE_DNSSD
DNSServiceErrorType error; /* Error from service creation */
/*
* First create a "master" connection for all registrations...
*/
if ((error = DNSServiceCreateConnection(&DNSSDMaster))
!= kDNSServiceErr_NoError)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to create master DNS-SD reference: %d", error);
if (FatalErrors & CUPSD_FATAL_BROWSE)
cupsdEndProcess(getpid(), 0);
}
else
{
/*
* Add the master connection to the select list...
*/
int fd = DNSServiceRefSockFD(DNSSDMaster);
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
cupsdAddSelect(fd, (cupsd_selfunc_t)dnssdUpdate, NULL, NULL);
}
/*
* Set the computer name and register the web interface...
*/
DNSSDPort = 0;
cupsdUpdateDNSSDName();
# else /* HAVE_AVAHI */
if ((DNSSDMaster = avahi_threaded_poll_new()) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create DNS-SD thread.");
if (FatalErrors & CUPSD_FATAL_BROWSE)
cupsdEndProcess(getpid(), 0);
}
else
{
int error; /* Error code, if any */
DNSSDClient = avahi_client_new(avahi_threaded_poll_get(DNSSDMaster), AVAHI_CLIENT_NO_FAIL, dnssdClientCallback, NULL, &error);
if (DNSSDClient == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to communicate with avahi-daemon: %s",
dnssdErrorString(error));
if (FatalErrors & CUPSD_FATAL_BROWSE)
cupsdEndProcess(getpid(), 0);
avahi_threaded_poll_free(DNSSDMaster);
DNSSDMaster = NULL;
}
else
avahi_threaded_poll_start(DNSSDMaster);
}
# endif /* HAVE_DNSSD */
}
#endif /* HAVE_DNSSD || HAVE_AVAHI */
/*
* Enable LPD and SMB printer sharing as needed through external programs...
*/
if (BrowseLocalProtocols & BROWSE_LPD)
update_lpd(1);
if (BrowseLocalProtocols & BROWSE_SMB)
update_smb(1);
#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
/*
* Register the individual printers
*/
dnssdRegisterAllPrinters(0);
#endif /* HAVE_DNSSD || HAVE_AVAHI */
}
static void
cupsd_send_notification(
cupsd_subscription_t *sub, /* I - Subscription object */
cupsd_event_t *event) /* I - Event to send */
{
ipp_state_t state; /* IPP event state */
cupsdLogMessage(CUPSD_LOG_DEBUG2,
"cupsd_send_notification(sub=%p(%d), event=%p(%s))",
sub, sub->id, event, cupsdEventName(event->event));
/*
* Allocate the events array as needed...
*/
if (!sub->events)
{
sub->events = cupsArrayNew3((cups_array_func_t)NULL, NULL,
(cups_ahash_func_t)NULL, 0,
(cups_acopy_func_t)NULL,
(cups_afree_func_t)cupsd_delete_event);
if (!sub->events)
{
cupsdLogMessage(CUPSD_LOG_CRIT,
"Unable to allocate memory for subscription #%d!",
sub->id);
return;
}
}
/*
* Purge an old event as needed...
*/
if (cupsArrayCount(sub->events) >= MaxEvents)
{
/*
* Purge the oldest event in the cache...
*/
cupsArrayRemove(sub->events, cupsArrayFirst(sub->events));
sub->first_event_id ++;
}
/*
* Add the event to the subscription. Since the events array is
* always MaxEvents in length, and since we will have already
* removed an event from the subscription cache if we hit the
* event cache limit, we don't need to check for overflow here...
*/
cupsArrayAdd(sub->events, event);
/*
* Deliver the event...
*/
if (sub->recipient)
{
for (;;)
{
if (sub->pipe < 0)
cupsd_start_notifier(sub);
cupsdLogMessage(CUPSD_LOG_DEBUG2, "sub->pipe=%d", sub->pipe);
if (sub->pipe < 0)
break;
event->attrs->state = IPP_IDLE;
while ((state = ippWriteFile(sub->pipe, event->attrs)) != IPP_DATA)
if (state == IPP_ERROR)
break;
if (state == IPP_ERROR)
{
if (errno == EPIPE)
{
/*
* Notifier died, try restarting it...
*/
cupsdLogMessage(CUPSD_LOG_WARN,
"Notifier for subscription %d (%s) went away, "
"retrying!",
sub->id, sub->recipient);
cupsdEndProcess(sub->pid, 0);
close(sub->pipe);
sub->pipe = -1;
continue;
}
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to send event for subscription %d (%s)!",
sub->id, sub->recipient);
}
/*
* If we get this far, break out of the loop...
*/
break;
}
}
/*
* Bump the event sequence number...
*/
sub->next_event_id ++;
}
int /* O - 1 if log file open */
cupsdCheckLogFile(cups_file_t **lf, /* IO - Log file */
const char *logname) /* I - Log filename */
{
char backname[1024], /* Backup log filename */
filename[1024], /* Formatted log filename */
*ptr; /* Pointer into filename */
const char *logptr; /* Pointer into log filename */
/*
* See if we have a log file to check...
*/
if (!lf || !logname || !logname[0])
return (1);
/*
* Handle logging to stderr...
*/
if (!strcmp(logname, "stderr"))
{
*lf = LogStderr;
return (1);
}
/*
* Format the filename as needed...
*/
if (!*lf ||
(strncmp(logname, "/dev/", 5) && cupsFileTell(*lf) > MaxLogSize &&
MaxLogSize > 0))
{
/*
* Handle format strings...
*/
filename[sizeof(filename) - 1] = '\0';
if (logname[0] != '/')
{
strlcpy(filename, ServerRoot, sizeof(filename));
strlcat(filename, "/", sizeof(filename));
}
else
filename[0] = '\0';
for (logptr = logname, ptr = filename + strlen(filename);
*logptr && ptr < (filename + sizeof(filename) - 1);
logptr ++)
if (*logptr == '%')
{
/*
* Format spec...
*/
logptr ++;
if (*logptr == 's')
{
/*
* Insert the server name...
*/
strlcpy(ptr, ServerName, sizeof(filename) - (size_t)(ptr - filename));
ptr += strlen(ptr);
}
else
{
/*
* Otherwise just insert the character...
*/
*ptr++ = *logptr;
}
}
else
*ptr++ = *logptr;
*ptr = '\0';
}
/*
* See if the log file is open...
*/
if (!*lf)
{
/*
* Nope, open the log file...
*/
if ((*lf = cupsFileOpen(filename, "a")) == NULL)
{
/*
* If the file is in CUPS_LOGDIR then try to create a missing directory...
*/
if (!strncmp(filename, CUPS_LOGDIR, strlen(CUPS_LOGDIR)))
{
/*
* Try updating the permissions of the containing log directory, using
* the log file permissions as a basis...
*/
mode_t log_dir_perm = (mode_t)(0300 | LogFilePerm);
/* LogFilePerm + owner write/search */
if (log_dir_perm & 0040)
log_dir_perm |= 0010; /* Add group search */
if (log_dir_perm & 0004)
log_dir_perm |= 0001; /* Add other search */
cupsdCheckPermissions(CUPS_LOGDIR, NULL, log_dir_perm, RunUser, Group, 1, -1);
*lf = cupsFileOpen(filename, "a");
}
if (*lf == NULL)
{
#ifdef HAVE_SYSTEMD_SD_JOURNAL_H
sd_journal_print(LOG_ERR, "Unable to open log file \"%s\" - %s", filename, strerror(errno));
#else
syslog(LOG_ERR, "Unable to open log file \"%s\" - %s", filename, strerror(errno));
#endif /* HAVE_SYSTEMD_SD_JOURNAL_H */
if (FatalErrors & CUPSD_FATAL_LOG)
cupsdEndProcess(getpid(), 0);
return (0);
}
}
if (strncmp(filename, "/dev/", 5))
{
/*
* Change ownership and permissions of non-device logs...
*/
fchown(cupsFileNumber(*lf), RunUser, Group);
fchmod(cupsFileNumber(*lf), LogFilePerm);
}
}
/*
* Do we need to rotate the log?
*/
if (strncmp(logname, "/dev/", 5) && cupsFileTell(*lf) > MaxLogSize &&
MaxLogSize > 0)
{
/*
* Rotate log file...
*/
cupsFileClose(*lf);
strlcpy(backname, filename, sizeof(backname));
strlcat(backname, ".O", sizeof(backname));
unlink(backname);
rename(filename, backname);
if ((*lf = cupsFileOpen(filename, "a")) == NULL)
{
#ifdef HAVE_SYSTEMD_SD_JOURNAL_H
sd_journal_print(LOG_ERR, "Unable to open log file \"%s\" - %s", filename, strerror(errno));
#else
syslog(LOG_ERR, "Unable to open log file \"%s\" - %s", filename, strerror(errno));
#endif /* HAVE_SYSTEMD_SD_JOURNAL_H */
if (FatalErrors & CUPSD_FATAL_LOG)
cupsdEndProcess(getpid(), 0);
return (0);
}
/*
* Change ownership and permissions of non-device logs...
*/
fchown(cupsFileNumber(*lf), RunUser, Group);
fchmod(cupsFileNumber(*lf), LogFilePerm);
}
return (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();
}