GNUnet 0.21.2
Functions
gnunet-daemon-hostlist_server.h File Reference

hostlist support. More...

#include "gnunet_core_service.h"
#include "gnunet_statistics_service.h"
#include "gnunet_util_lib.h"
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Functions

int GNUNET_HOSTLIST_server_start (const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_STATISTICS_Handle *st, struct GNUNET_CORE_Handle *core, GNUNET_CORE_ConnectEventHandler *server_ch, int advertise)
 Start server offering our hostlist. More...
 
void GNUNET_HOSTLIST_server_stop (void)
 Stop server offering our hostlist. More...
 

Detailed Description

hostlist support.

Downloads HELLOs via HTTP.

Author
Christian Grothoff

Definition in file gnunet-daemon-hostlist_server.h.

Function Documentation

◆ GNUNET_HOSTLIST_server_start()

int GNUNET_HOSTLIST_server_start ( const struct GNUNET_CONFIGURATION_Handle *  c,
struct GNUNET_STATISTICS_Handle *  st,
struct GNUNET_CORE_Handle *  co,
GNUNET_CORE_ConnectEventHandler *  server_ch,
int  advertise 
)

Start server offering our hostlist.

Parameters
cconfiguration to use
ststatistics handle to use
cocore handle to use
[out]server_chset to handler for CORE connect events
advertiseGNUNET_YES if we should advertise our hostlist
Returns
GNUNET_OK on success

Definition at line 647 of file gnunet-daemon-hostlist_server.c.

652{
653 unsigned long long port;
654 char *hostname;
655 char *ipv4;
656 char *ipv6;
657 size_t size;
658 struct in_addr i4;
659 struct in6_addr i6;
660 struct sockaddr_in v4;
661 struct sockaddr_in6 v6;
662 const struct sockaddr *sa4;
663 const struct sockaddr *sa6;
664
665 hellos = GNUNET_CONTAINER_multipeermap_create (16, GNUNET_YES);
666 advertising = advertise;
667 if (! advertising)
668 {
669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
670 "Advertising not enabled on this hostlist server\n");
671 }
672 else
673 {
674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
675 "Advertising enabled on this hostlist server\n");
676 }
677 cfg = c;
678 stats = st;
679 peerstore = GNUNET_PEERSTORE_connect (cfg);
680 if (NULL == peerstore)
681 {
682 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
683 _ ("Could not access PEERSTORE service. Exiting.\n"));
684 return GNUNET_SYSERR;
685 }
686 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg,
687 "HOSTLIST",
688 "HTTPPORT",
689 &port))
690 return GNUNET_SYSERR;
691 if ((0 == port) || (port > UINT16_MAX))
692 {
693 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
694 _ ("Invalid port number %llu. Exiting.\n"),
695 port);
696 return GNUNET_SYSERR;
697 }
698
699 if (GNUNET_SYSERR ==
700 GNUNET_CONFIGURATION_get_value_string (cfg,
701 "HOSTLIST",
702 "EXTERNAL_DNS_NAME",
703 &hostname))
704 hostname = GNUNET_RESOLVER_local_fqdn_get ();
705 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
706 _ ("Hostlist service starts on %s:%llu\n"),
707 hostname,
708 port);
709 if (NULL != hostname)
710 {
711 size = strlen (hostname);
712 if (size + 15 > MAX_URL_LEN)
713 {
714 GNUNET_break (0);
715 }
716 else
717 {
718 GNUNET_asprintf (&hostlist_uri,
719 "http://%s:%u/",
720 hostname,
721 (unsigned int) port);
722 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
723 _ ("Address to obtain hostlist: `%s'\n"),
724 hostlist_uri);
725 }
726 GNUNET_free (hostname);
727 }
728
729 if (GNUNET_CONFIGURATION_have_value (cfg, "HOSTLIST", "BINDTOIPV4"))
730 {
731 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
732 "HOSTLIST",
733 "BINDTOIP",
734 &ipv4))
735 {
736 GNUNET_log (
737 GNUNET_ERROR_TYPE_WARNING,
738 _ ("BINDTOIP does not a valid IPv4 address! Ignoring BINDTOIPV4.\n"));
739 }
740 }
741 else
742 ipv4 = NULL;
743 if (GNUNET_CONFIGURATION_have_value (cfg, "HOSTLIST", "BINDTOIPV6"))
744 {
745 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
746 "HOSTLIST",
747 "BINDTOIP",
748 &ipv6))
749 {
750 GNUNET_log (
751 GNUNET_ERROR_TYPE_WARNING,
752 _ ("BINDTOIP does not a valid IPv4 address! Ignoring BINDTOIPV6.\n"));
753 }
754 }
755 else
756 ipv6 = NULL;
757 sa4 = NULL;
758 if (NULL != ipv4)
759 {
760 if (1 == inet_pton (AF_INET, ipv4, &i4))
761 {
762 memset (&v4, 0, sizeof(v4));
763 v4.sin_family = AF_INET;
764 v4.sin_addr = i4;
765 v4.sin_port = htons (port);
766#if HAVE_SOCKADDR_IN_SIN_LEN
767 v4.sin_len = sizeof(v4);
768#endif
769 sa4 = (const struct sockaddr *) &v4;
770 }
771 else
772 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
773 _ (
774 "`%s' is not a valid IPv4 address! Ignoring BINDTOIPV4.\n"),
775 ipv4);
776 GNUNET_free (ipv4);
777 }
778 sa6 = NULL;
779 if (NULL != ipv6)
780 {
781 if (1 == inet_pton (AF_INET6, ipv6, &i6))
782 {
783 memset (&v6, 0, sizeof(v6));
784 v6.sin6_family = AF_INET6;
785 v6.sin6_addr = i6;
786 v6.sin6_port = htons (port);
787#if HAVE_SOCKADDR_IN_SIN_LEN
788 v6.sin6_len = sizeof(v6);
789#endif
790 sa6 = (const struct sockaddr *) &v6;
791 }
792 else
793 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
794 _ (
795 "`%s' is not a valid IPv6 address! Ignoring BINDTOIPV6.\n"),
796 ipv6);
797 GNUNET_free (ipv6);
798 }
799
800 daemon_handle_v6 = MHD_start_daemon (MHD_USE_IPv6 | MHD_USE_DEBUG,
801 (uint16_t) port,
802 &accept_policy_callback,
803 NULL,
804 &access_handler_callback,
805 NULL,
806 MHD_OPTION_CONNECTION_LIMIT,
807 (unsigned int) 128,
808 MHD_OPTION_PER_IP_CONNECTION_LIMIT,
809 (unsigned int) 32,
810 MHD_OPTION_CONNECTION_TIMEOUT,
811 (unsigned int) 16,
812 MHD_OPTION_CONNECTION_MEMORY_LIMIT,
813 (size_t) (16 * 1024),
814 MHD_OPTION_SOCK_ADDR,
815 sa6,
816 MHD_OPTION_END);
817 daemon_handle_v4 = MHD_start_daemon (MHD_NO_FLAG | MHD_USE_DEBUG,
818 (uint16_t) port,
819 &accept_policy_callback,
820 NULL,
821 &access_handler_callback,
822 NULL,
823 MHD_OPTION_CONNECTION_LIMIT,
824 (unsigned int) 128,
825 MHD_OPTION_PER_IP_CONNECTION_LIMIT,
826 (unsigned int) 32,
827 MHD_OPTION_CONNECTION_TIMEOUT,
828 (unsigned int) 16,
829 MHD_OPTION_CONNECTION_MEMORY_LIMIT,
830 (size_t) (16 * 1024),
831 MHD_OPTION_SOCK_ADDR,
832 sa4,
833 MHD_OPTION_END);
834
835 if ((NULL == daemon_handle_v6) && (NULL == daemon_handle_v4))
836 {
837 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
838 _ ("Could not start hostlist HTTP server on port %u\n"),
839 (unsigned short) port);
840 return GNUNET_SYSERR;
841 }
842
843 core = co;
844 *server_ch = &connect_handler;
845 if (NULL != daemon_handle_v4)
846 hostlist_task_v4 = prepare_daemon (daemon_handle_v4);
847 if (NULL != daemon_handle_v6)
848 hostlist_task_v6 = prepare_daemon (daemon_handle_v6);
849 peerstore_notify_task = GNUNET_SCHEDULER_add_delayed (
850 GNUNET_TIME_UNIT_MINUTES,
851 start_notify,
852 NULL);
853 return GNUNET_OK;
854}
port
static uint16_t port
Port number.
Definition: gnunet-bcd.c:147
st
static struct GNUNET_SCHEDULER_Task * st
The shutdown task.
Definition: gnunet-conversation-test.c:82
server_ch
static GNUNET_CORE_ConnectEventHandler server_ch
Handle to hostlist server's connect handler.
Definition: gnunet-daemon-hostlist.c:48
MAX_URL_LEN
#define MAX_URL_LEN
How long can hostlist URLs be?
Definition: gnunet-daemon-hostlist.h:36
daemon_handle_v6
static struct MHD_Daemon * daemon_handle_v6
Handle to the HTTP server as provided by libmicrohttpd for IPv6.
Definition: gnunet-daemon-hostlist_server.c:54
daemon_handle_v4
static struct MHD_Daemon * daemon_handle_v4
Handle to the HTTP server as provided by libmicrohttpd for IPv4.
Definition: gnunet-daemon-hostlist_server.c:59
hostlist_task_v4
static struct GNUNET_SCHEDULER_Task * hostlist_task_v4
Our primary task for IPv4.
Definition: gnunet-daemon-hostlist_server.c:91
core
static struct GNUNET_CORE_Handle * core
Handle to the core service (NULL until we've connected to it).
Definition: gnunet-daemon-hostlist_server.c:74
advertising
static int advertising
Set if we are allowed to advertise our hostlist to others.
Definition: gnunet-daemon-hostlist_server.c:111
connect_handler
static void * connect_handler(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a given peer connects.
Definition: gnunet-daemon-hostlist_server.c:425
stats
static struct GNUNET_STATISTICS_Handle * stats
For keeping statistics.
Definition: gnunet-daemon-hostlist_server.c:69
hellos
struct GNUNET_CONTAINER_MultiPeerMap * hellos
Map with hellos we build the hostlist with.
Definition: gnunet-daemon-hostlist_server.c:49
cfg
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
Definition: gnunet-daemon-hostlist_server.c:64
hostlist_task_v6
static struct GNUNET_SCHEDULER_Task * hostlist_task_v6
Our primary task for IPv6.
Definition: gnunet-daemon-hostlist_server.c:96
peerstore
static struct GNUNET_PEERSTORE_Handle * peerstore
Handle to the PEERSTORE service.
Definition: gnunet-daemon-hostlist_server.c:106
prepare_daemon
static struct GNUNET_SCHEDULER_Task * prepare_daemon(struct MHD_Daemon *daemon_handle)
Function that queries MHD's select sets and starts the task waiting for them.
Definition: gnunet-daemon-hostlist_server.c:561
start_notify
static void start_notify(void *cls)
Definition: gnunet-daemon-hostlist_server.c:617
peerstore_notify_task
struct GNUNET_SCHEDULER_Task * peerstore_notify_task
The task to delayed start the notification process initially.
Definition: gnunet-daemon-hostlist_server.c:80
access_handler_callback
static MHD_RESULT access_handler_callback(void *cls, struct MHD_Connection *connection, const char *url, const char *method, const char *version, const char *upload_data, size_t *upload_data_size, void **con_cls)
Main request handler.
Definition: gnunet-daemon-hostlist_server.c:299
hostlist_uri
static char * hostlist_uri
Buffer for the hostlist address.
Definition: gnunet-daemon-hostlist_server.c:116
accept_policy_callback
static MHD_RESULT accept_policy_callback(void *cls, const struct sockaddr *addr, socklen_t addrlen)
Hostlist access policy (very permissive, allows everything).
Definition: gnunet-daemon-hostlist_server.c:248
ipv4
static int ipv4
Option -4: IPv4 requested.
Definition: gnunet-vpn.c:60
ipv6
static int ipv6
Option -6: IPv6 requested.
Definition: gnunet-vpn.c:65
GNUNET_CONFIGURATION_get_value_number
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
Definition: configuration.c:1663
GNUNET_CONFIGURATION_get_value_string
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
Definition: configuration.c:1754
GNUNET_CONFIGURATION_have_value
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_have_value(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option)
Test if we have a value for a particular option.
Definition: configuration.c:1836
GNUNET_CONTAINER_multipeermap_create
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
Definition: container_multipeermap.c:179
GNUNET_log
#define GNUNET_log(kind,...)
Definition: gnunet_common.h:569
GNUNET_OK
@ GNUNET_OK
Definition: gnunet_common.h:109
GNUNET_YES
@ GNUNET_YES
Definition: gnunet_common.h:111
GNUNET_SYSERR
@ GNUNET_SYSERR
Definition: gnunet_common.h:107
GNUNET_break
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
Definition: gnunet_common.h:1062
GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_WARNING
Definition: gnunet_common.h:436
GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_ERROR
Definition: gnunet_common.h:435
GNUNET_ERROR_TYPE_DEBUG
@ GNUNET_ERROR_TYPE_DEBUG
Definition: gnunet_common.h:442
GNUNET_ERROR_TYPE_INFO
@ GNUNET_ERROR_TYPE_INFO
Definition: gnunet_common.h:441
GNUNET_asprintf
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
GNUNET_free
#define GNUNET_free(ptr)
Wrapper around free.
Definition: gnunet_common.h:1458
GNUNET_PEERSTORE_connect
struct GNUNET_PEERSTORE_Handle * GNUNET_PEERSTORE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the PEERSTORE service.
Definition: peerstore_api.c:419
GNUNET_RESOLVER_local_fqdn_get
char * GNUNET_RESOLVER_local_fqdn_get(void)
Get local fully qualified domain name.
Definition: resolver_api.c:1149
GNUNET_SCHEDULER_add_delayed
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1278
GNUNET_TIME_UNIT_MINUTES
#define GNUNET_TIME_UNIT_MINUTES
One minute.
Definition: gnunet_time_lib.h:155
size
static unsigned int size
Size of the "table".
Definition: peer.c:68
_
#define _(String)
GNU gettext support macro.
Definition: platform.h:178

References _, accept_policy_callback(), access_handler_callback(), advertising, cfg, connect_handler(), core, daemon_handle_v4, daemon_handle_v6, GNUNET_asprintf(), GNUNET_break, GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_CONFIGURATION_have_value(), GNUNET_CONTAINER_multipeermap_create(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_log, GNUNET_OK, GNUNET_PEERSTORE_connect(), GNUNET_RESOLVER_local_fqdn_get(), GNUNET_SCHEDULER_add_delayed(), GNUNET_SYSERR, GNUNET_TIME_UNIT_MINUTES, GNUNET_YES, hellos, hostlist_task_v4, hostlist_task_v6, hostlist_uri, ipv4, ipv6, MAX_URL_LEN, peerstore, peerstore_notify_task, port, prepare_daemon(), server_ch, size, st, start_notify(), and stats.

Referenced by run().

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◆ GNUNET_HOSTLIST_server_stop()

void GNUNET_HOSTLIST_server_stop ( void  )

Stop server offering our hostlist.

Definition at line 861 of file gnunet-daemon-hostlist_server.c.

862{
863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Hostlist server shutdown\n");
864 if (NULL != hostlist_task_v6)
865 {
866 GNUNET_SCHEDULER_cancel (hostlist_task_v6);
867 hostlist_task_v6 = NULL;
868 }
869 if (NULL != hostlist_task_v4)
870 {
871 GNUNET_SCHEDULER_cancel (hostlist_task_v4);
872 hostlist_task_v4 = NULL;
873 }
874 if (NULL != daemon_handle_v4)
875 {
876 MHD_stop_daemon (daemon_handle_v4);
877 daemon_handle_v4 = NULL;
878 }
879 if (NULL != daemon_handle_v6)
880 {
881 MHD_stop_daemon (daemon_handle_v6);
882 daemon_handle_v6 = NULL;
883 }
884 if (NULL != response)
885 {
886 MHD_destroy_response (response);
887 response = NULL;
888 }
889 if (NULL != peerstore_notify)
890 {
891 GNUNET_PEERSTORE_monitor_stop (peerstore_notify);
892 peerstore_notify = NULL;
893 }
894 else if (NULL != peerstore_notify_task)
895 {
896 GNUNET_SCHEDULER_cancel (peerstore_notify_task);
897 }
898 if (NULL != builder)
899 {
900 GNUNET_free (builder->data);
901 GNUNET_free (builder);
902 builder = NULL;
903 }
904 if (NULL != peerstore)
905 {
906 GNUNET_PEERSTORE_disconnect (peerstore);
907 peerstore = NULL;
908 }
909 cfg = NULL;
910 stats = NULL;
911 core = NULL;
912}
response
static struct MHD_Response * response
Our canonical response.
Definition: gnunet-daemon-hostlist_server.c:101
builder
static struct HostSet * builder
NULL if we are not currently iterating over peer information.
Definition: gnunet-daemon-hostlist_server.c:139
peerstore_notify
static struct GNUNET_PEERSTORE_Monitor * peerstore_notify
Our peerstore notification context.
Definition: gnunet-daemon-hostlist_server.c:86
GNUNET_PEERSTORE_monitor_stop
void GNUNET_PEERSTORE_monitor_stop(struct GNUNET_PEERSTORE_Monitor *zm)
Stop monitoring.
Definition: peerstore_api_monitor.c:282
GNUNET_PEERSTORE_disconnect
void GNUNET_PEERSTORE_disconnect(struct GNUNET_PEERSTORE_Handle *h)
Disconnect from the PEERSTORE service.
Definition: peerstore_api.c:443
GNUNET_SCHEDULER_cancel
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:981
HostSet::data
char * data
Place where we accumulate all of the HELLO messages.
Definition: gnunet-daemon-hostlist_server.c:127

References builder, cfg, core, daemon_handle_v4, daemon_handle_v6, HostSet::data, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_PEERSTORE_disconnect(), GNUNET_PEERSTORE_monitor_stop(), GNUNET_SCHEDULER_cancel(), hostlist_task_v4, hostlist_task_v6, peerstore, peerstore_notify, peerstore_notify_task, response, and stats.

Referenced by cleaning_task().

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