/*
This file is part of GNUnet.
Copyright (C) 2008, 2009, 2010, 2014, 2016 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file hostlist/gnunet-daemon-hostlist_server.c
* @author Christian Grothoff
* @author Matthias Wachs
* @author David Barksdale
* @brief application to provide an integrated hostlist HTTP server
*/
#include "platform.h"
#include
#include "gnunet-daemon-hostlist_server.h"
#include "gnunet_hello_lib.h"
#include "gnunet_peerinfo_service.h"
#include "gnunet-daemon-hostlist.h"
#include "gnunet_resolver_service.h"
/**
* How long until our hostlist advertisment transmission via CORE should
* time out?
*/
#define GNUNET_ADV_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
/**
* Handle to the HTTP server as provided by libmicrohttpd for IPv6.
*/
static struct MHD_Daemon *daemon_handle_v6;
/**
* Handle to the HTTP server as provided by libmicrohttpd for IPv4.
*/
static struct MHD_Daemon *daemon_handle_v4;
/**
* Our configuration.
*/
static const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* For keeping statistics.
*/
static struct GNUNET_STATISTICS_Handle *stats;
/**
* Handle to the core service (NULL until we've connected to it).
*/
static struct GNUNET_CORE_Handle *core;
/**
* Handle to the peerinfo notify service (NULL until we've connected to it).
*/
static struct GNUNET_PEERINFO_NotifyContext *notify;
/**
* Our primary task for IPv4.
*/
static struct GNUNET_SCHEDULER_Task *hostlist_task_v4;
/**
* Our primary task for IPv6.
*/
static struct GNUNET_SCHEDULER_Task *hostlist_task_v6;
/**
* Our canonical response.
*/
static struct MHD_Response *response;
/**
* Handle for accessing peerinfo service.
*/
static struct GNUNET_PEERINFO_Handle *peerinfo;
/**
* Set if we are allowed to advertise our hostlist to others.
*/
static int advertising;
/**
* Buffer for the hostlist address
*/
static char *hostlist_uri;
/**
* Context for #host_processor().
*/
struct HostSet
{
/**
* Iterator used to build @e data (NULL when done).
*/
struct GNUNET_PEERINFO_IteratorContext *pitr;
/**
* Place where we accumulate all of the HELLO messages.
*/
char *data;
/**
* Number of bytes in @e data.
*/
unsigned int size;
};
/**
* NULL if we are not currenlty iterating over peer information.
*/
static struct HostSet *builder;
/**
* Add headers to a request indicating that we allow Cross-Origin Resource
* Sharing.
*
* @param response response to add headers to
*/
static void
add_cors_headers (struct MHD_Response *response)
{
MHD_add_response_header (response,
"Access-Control-Allow-Origin",
"*");
MHD_add_response_header (response,
"Access-Control-Allow-Methods",
"GET, OPTIONS");
MHD_add_response_header (response,
"Access-Control-Max-Age",
"86400");
}
/**
* Function that assembles our response.
*/
static void
finish_response ()
{
if (NULL != response)
MHD_destroy_response (response);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Creating hostlist response with %u bytes\n",
(unsigned int) builder->size);
response =
MHD_create_response_from_buffer (builder->size,
builder->data,
MHD_RESPMEM_MUST_FREE);
add_cors_headers (response);
if ((NULL == daemon_handle_v4) && (NULL == daemon_handle_v6))
{
MHD_destroy_response (response);
response = NULL;
}
GNUNET_STATISTICS_set (stats, gettext_noop ("bytes in hostlist"),
builder->size, GNUNET_YES);
GNUNET_free (builder);
builder = NULL;
}
/**
* Set @a cls to #GNUNET_YES (we have an address!).
*
* @param cls closure, an `int *`
* @param address the address (ignored)
* @param expiration expiration time (call is ignored if this is in the past)
* @return #GNUNET_SYSERR to stop iterating (unless expiration has occured)
*/
static int
check_has_addr (void *cls,
const struct GNUNET_HELLO_Address *address,
struct GNUNET_TIME_Absolute expiration)
{
int *arg = cls;
if (0 == GNUNET_TIME_absolute_get_remaining (expiration).rel_value_us)
{
GNUNET_STATISTICS_update (stats,
gettext_noop ("expired addresses encountered"), 1,
GNUNET_YES);
return GNUNET_YES; /* ignore this address */
}
*arg = GNUNET_YES;
return GNUNET_SYSERR;
}
/**
* Callback that processes each of the known HELLOs for the
* hostlist response construction.
*
* @param cls closure, NULL
* @param peer id of the peer, NULL for last call
* @param hello hello message for the peer (can be NULL)
* @param err_msg message
*/
static void
host_processor (void *cls,
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Message *hello,
const char *err_msg)
{
size_t old;
size_t s;
int has_addr;
if (NULL != err_msg)
{
GNUNET_assert (NULL == peer);
builder->pitr = NULL;
GNUNET_free_non_null (builder->data);
GNUNET_free (builder);
builder = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Error in communication with PEERINFO service: %s\n"),
err_msg);
return;
}
if (NULL == peer)
{
builder->pitr = NULL;
finish_response ();
return;
}
if (NULL == hello)
return;
has_addr = GNUNET_NO;
GNUNET_HELLO_iterate_addresses (hello,
GNUNET_NO,
&check_has_addr,
&has_addr);
if (GNUNET_NO == has_addr)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"HELLO for peer `%4s' has no address, not suitable for hostlist!\n",
GNUNET_i2s (peer));
GNUNET_STATISTICS_update (stats,
gettext_noop
("HELLOs without addresses encountered (ignored)"),
1, GNUNET_NO);
return;
}
old = builder->size;
s = GNUNET_HELLO_size (hello);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received %u bytes of `%s' from peer `%s' for hostlist.\n",
(unsigned int) s,
"HELLO",
GNUNET_i2s (peer));
if ( (old + s >= GNUNET_MAX_MALLOC_CHECKED) ||
(old + s >= MAX_BYTES_PER_HOSTLISTS) )
{
/* too large, skip! */
GNUNET_STATISTICS_update (stats,
gettext_noop
("bytes not included in hostlist (size limit)"),
s, GNUNET_NO);
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Adding peer `%s' to hostlist (%u bytes)\n",
GNUNET_i2s (peer),
(unsigned int) s);
GNUNET_array_grow (builder->data,
builder->size,
old + s);
GNUNET_memcpy (&builder->data[old],
hello,
s);
}
/**
* Hostlist access policy (very permissive, allows everything).
* Returns #MHD_NO only if we are not yet ready to serve.
*
* @param cls closure
* @param addr address information from the client
* @param addrlen length of @a addr
* @return #MHD_YES if connection is allowed, #MHD_NO if not (we are not ready)
*/
static int
accept_policy_callback (void *cls,
const struct sockaddr *addr,
socklen_t addrlen)
{
if (NULL == response)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received request for hostlist, but I am not yet ready; rejecting!\n");
return MHD_NO;
}
return MHD_YES; /* accept all */
}
/**
* Main request handler.
*
* @param cls argument given together with the function
* pointer when the handler was registered with MHD
* @param connection
* @param url the requested url
* @param method the HTTP method used (#MHD_HTTP_METHOD_GET,
* #MHD_HTTP_METHOD_PUT, etc.)
* @param version the HTTP version string (i.e.
* #MHD_HTTP_VERSION_1_1)
* @param upload_data the data being uploaded (excluding HEADERS,
* for a POST that fits into memory and that is encoded
* with a supported encoding, the POST data will NOT be
* given in upload_data and is instead available as
* part of #MHD_get_connection_values; very large POST
* data *will* be made available incrementally in
* @a upload_data)
* @param upload_data_size set initially to the size of the
* @a upload_data provided; the method must update this
* value to the number of bytes NOT processed;
* @param con_cls pointer that the callback can set to some
* address and that will be preserved by MHD for future
* calls for this request; since the access handler may
* be called many times (i.e., for a PUT/POST operation
* with plenty of upload data) this allows the application
* to easily associate some request-specific state.
* If necessary, this state can be cleaned up in the
* global #MHD_RequestCompletedCallback (which
* can be set with the #MHD_OPTION_NOTIFY_COMPLETED).
* Initially, `*con_cls` will be NULL.
* @return #MHD_YES if the connection was handled successfully,
* #MHD_NO if the socket must be closed due to a serios
* error while handling the request
*/
static int
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)
{
static int dummy;
/* CORS pre-flight request */
if (0 == strcmp (MHD_HTTP_METHOD_OPTIONS, method))
{
struct MHD_Response *options_response;
int rc;
options_response = MHD_create_response_from_buffer (0, NULL,
MHD_RESPMEM_PERSISTENT);
add_cors_headers(options_response);
rc = MHD_queue_response (connection, MHD_HTTP_OK, options_response);
MHD_destroy_response (options_response);
return rc;
}
if (0 != strcmp (method, MHD_HTTP_METHOD_GET))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Refusing `%s' request to hostlist server\n"), method);
GNUNET_STATISTICS_update (stats,
gettext_noop
("hostlist requests refused (not HTTP GET)"), 1,
GNUNET_YES);
return MHD_NO;
}
if (NULL == *con_cls)
{
(*con_cls) = &dummy;
return MHD_YES;
}
if (0 != *upload_data_size)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Refusing `%s' request with %llu bytes of upload data\n"),
method, (unsigned long long) *upload_data_size);
GNUNET_STATISTICS_update (stats,
gettext_noop
("hostlist requests refused (upload data)"), 1,
GNUNET_YES);
return MHD_NO; /* do not support upload data */
}
if (NULL == response)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Could not handle hostlist request since I do not have a response yet\n"));
GNUNET_STATISTICS_update (stats,
gettext_noop
("hostlist requests refused (not ready)"), 1,
GNUNET_YES);
return MHD_NO; /* internal error, no response yet */
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Received request for our hostlist\n"));
GNUNET_STATISTICS_update (stats,
gettext_noop ("hostlist requests processed"),
1, GNUNET_YES);
return MHD_queue_response (connection, MHD_HTTP_OK, response);
}
/**
* Handler called by CORE when CORE is ready to transmit message
*
* @param cls closure with the `const struct GNUNET_PeerIdentity *` of
* the peer we are sending to
* @param size size of buffer to copy message to
* @param buf buffer to copy message to
* @return number of bytes copied to @a buf
*/
static void
adv_transmit (struct GNUNET_MQ_Handle *mq)
{
static uint64_t hostlist_adv_count;
const void *extra;
uint64_t flags;
size_t uri_size; /* Including \0 termination! */
struct GNUNET_MessageHeader *header;
struct GNUNET_MQ_Envelope *env;
extra = GNUNET_CORE_get_mq_options (GNUNET_YES,
GNUNET_CORE_PRIO_BEST_EFFORT,
&flags);
uri_size = strlen (hostlist_uri) + 1;
env = GNUNET_MQ_msg_extra (header,
uri_size,
GNUNET_MESSAGE_TYPE_HOSTLIST_ADVERTISEMENT);
GNUNET_memcpy (&header[1],
hostlist_uri,
uri_size);
GNUNET_MQ_env_set_options (env,
flags,
extra);
GNUNET_MQ_send (mq,
env);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sent advertisement message: Copied %u bytes into buffer!\n",
(unsigned int) uri_size);
hostlist_adv_count++;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
" # Sent advertisement message: %llu\n",
(unsigned long long) hostlist_adv_count);
GNUNET_STATISTICS_update (stats,
gettext_noop ("# hostlist advertisements send"), 1,
GNUNET_NO);
}
/**
* Method called whenever a given peer connects.
*
* @param cls closure
* @param peer peer identity this notification is about
* @param mq queue for transmission to @a peer
* @return NULL (must!)
*/
static void *
connect_handler (void *cls,
const struct GNUNET_PeerIdentity *peer,
struct GNUNET_MQ_Handle *mq)
{
size_t size;
if (! advertising)
return NULL;
if (NULL == hostlist_uri)
return NULL;
size = strlen (hostlist_uri) + 1;
if (size + sizeof (struct GNUNET_MessageHeader) >=
GNUNET_MAX_MESSAGE_SIZE)
{
GNUNET_break (0);
return NULL;
}
size += sizeof (struct GNUNET_MessageHeader);
if (NULL == core)
{
GNUNET_break (0);
return NULL;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Asked CORE to transmit advertisement message with a size of %u bytes to peer `%s'\n",
(unsigned int) size,
GNUNET_i2s (peer));
adv_transmit (mq);
return NULL;
}
/**
* PEERINFO calls this function to let us know about a possible peer
* that we might want to connect to.
*
* @param cls closure (not used)
* @param peer potential peer to connect to
* @param hello HELLO for this peer (or NULL)
* @param err_msg NULL if successful, otherwise contains error message
*/
static void
process_notify (void *cls,
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_HELLO_Message *hello,
const char *err_msg)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Peerinfo is notifying us to rebuild our hostlist\n");
if (NULL != err_msg)
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Error in communication with PEERINFO service: %s\n"),
err_msg);
if (NULL != builder)
{
/* restart re-build already in progress ... */
if (NULL != builder->pitr)
{
GNUNET_PEERINFO_iterate_cancel (builder->pitr);
builder->pitr = NULL;
}
GNUNET_free_non_null (builder->data);
builder->size = 0;
builder->data = NULL;
}
else
{
builder = GNUNET_new (struct HostSet);
}
GNUNET_assert (NULL != peerinfo);
builder->pitr
= GNUNET_PEERINFO_iterate (peerinfo,
GNUNET_NO, NULL,
&host_processor, NULL);
}
/**
* Function that queries MHD's select sets and
* starts the task waiting for them.
*/
static struct GNUNET_SCHEDULER_Task *
prepare_daemon (struct MHD_Daemon *daemon_handle);
/**
* Call MHD to process pending requests and then go back
* and schedule the next run.
*
* @param cls the `struct MHD_Daemon` of the HTTP server to run
*/
static void
run_daemon (void *cls)
{
struct MHD_Daemon *daemon_handle = cls;
if (daemon_handle == daemon_handle_v4)
hostlist_task_v4 = NULL;
else
hostlist_task_v6 = NULL;
GNUNET_assert (MHD_YES == MHD_run (daemon_handle));
if (daemon_handle == daemon_handle_v4)
hostlist_task_v4 = prepare_daemon (daemon_handle);
else
hostlist_task_v6 = prepare_daemon (daemon_handle);
}
/**
* Function that queries MHD's select sets and
* starts the task waiting for them.
*
* @param daemon_handle HTTP server to prepare to run
*/
static struct GNUNET_SCHEDULER_Task *
prepare_daemon (struct MHD_Daemon *daemon_handle)
{
struct GNUNET_SCHEDULER_Task * ret;
fd_set rs;
fd_set ws;
fd_set es;
struct GNUNET_NETWORK_FDSet *wrs;
struct GNUNET_NETWORK_FDSet *wws;
int max;
MHD_UNSIGNED_LONG_LONG timeout;
int haveto;
struct GNUNET_TIME_Relative tv;
FD_ZERO (&rs);
FD_ZERO (&ws);
FD_ZERO (&es);
wrs = GNUNET_NETWORK_fdset_create ();
wws = GNUNET_NETWORK_fdset_create ();
max = -1;
GNUNET_assert (MHD_YES ==
MHD_get_fdset (daemon_handle,
&rs, &ws, &es, &max));
haveto = MHD_get_timeout (daemon_handle, &timeout);
if (haveto == MHD_YES)
tv.rel_value_us = (uint64_t) timeout * 1000LL;
else
tv = GNUNET_TIME_UNIT_FOREVER_REL;
GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
ret = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
tv, wrs, wws,
&run_daemon, daemon_handle);
GNUNET_NETWORK_fdset_destroy (wrs);
GNUNET_NETWORK_fdset_destroy (wws);
return ret;
}
/**
* Start server offering our hostlist.
*
* @param c configuration to use
* @param st statistics handle to use
* @param co core handle to use
* @param[out] server_ch set to handler for CORE connect events
* @param advertise #GNUNET_YES if we should advertise our hostlist
* @return #GNUNET_OK on success
*/
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)
{
unsigned long long port;
char *hostname;
char *ipv4;
char *ipv6;
size_t size;
struct in_addr i4;
struct in6_addr i6;
struct sockaddr_in v4;
struct sockaddr_in6 v6;
const struct sockaddr *sa4;
const struct sockaddr *sa6;
advertising = advertise;
if (! advertising)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Advertising not enabled on this hostlist server\n");
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Advertising enabled on this hostlist server\n");
}
cfg = c;
stats = st;
peerinfo = GNUNET_PEERINFO_connect (cfg);
if (NULL == peerinfo)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Could not access PEERINFO service. Exiting.\n"));
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_number (cfg,
"HOSTLIST",
"HTTPPORT",
&port))
return GNUNET_SYSERR;
if ((0 == port) || (port > UINT16_MAX))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Invalid port number %llu. Exiting.\n"),
port);
return GNUNET_SYSERR;
}
if (GNUNET_SYSERR ==
GNUNET_CONFIGURATION_get_value_string (cfg,
"HOSTLIST",
"EXTERNAL_DNS_NAME",
&hostname))
hostname = GNUNET_RESOLVER_local_fqdn_get ();
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Hostlist service starts on %s:%llu\n"),
hostname, port);
if (NULL != hostname)
{
size = strlen (hostname);
if (size + 15 > MAX_URL_LEN)
{
GNUNET_break (0);
}
else
{
GNUNET_asprintf (&hostlist_uri,
"http://%s:%u/", hostname,
(unsigned int) port);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Address to obtain hostlist: `%s'\n"),
hostlist_uri);
}
GNUNET_free (hostname);
}
if (GNUNET_CONFIGURATION_have_value (cfg, "HOSTLIST", "BINDTOIPV4"))
{
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg, "HOSTLIST",
"BINDTOIP", &ipv4))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("BINDTOIP does not a valid IPv4 address! Ignoring BINDTOIPV4.\n"));
}
}
else
ipv4 = NULL;
if (GNUNET_CONFIGURATION_have_value (cfg,
"HOSTLIST",
"BINDTOIPV6"))
{
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg,
"HOSTLIST",
"BINDTOIP",
&ipv6))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("BINDTOIP does not a valid IPv4 address! Ignoring BINDTOIPV6.\n"));
}
}
else
ipv6 = NULL;
sa4 = NULL;
if (NULL != ipv4)
{
if (1 == inet_pton (AF_INET, ipv4, &i4))
{
memset (&v4, 0, sizeof (v4));
v4.sin_family = AF_INET;
v4.sin_addr = i4;
v4.sin_port = htons (port);
#if HAVE_SOCKADDR_IN_SIN_LEN
v4.sin_len = sizeof (v4);
#endif
sa4 = (const struct sockaddr *) &v4;
}
else
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("`%s' is not a valid IPv4 address! Ignoring BINDTOIPV4.\n"),
ipv4);
GNUNET_free (ipv4);
}
sa6 = NULL;
if (NULL != ipv6)
{
if (1 == inet_pton (AF_INET6, ipv6, &i6))
{
memset (&v6, 0, sizeof (v6));
v6.sin6_family = AF_INET6;
v6.sin6_addr = i6;
v6.sin6_port = htons (port);
#if HAVE_SOCKADDR_IN_SIN_LEN
v6.sin6_len = sizeof (v6);
#endif
sa6 = (const struct sockaddr *) &v6;
}
else
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("`%s' is not a valid IPv6 address! Ignoring BINDTOIPV6.\n"),
ipv6);
GNUNET_free (ipv6);
}
daemon_handle_v6 = MHD_start_daemon (MHD_USE_IPv6 | MHD_USE_DEBUG,
(uint16_t) port,
&accept_policy_callback, NULL,
&access_handler_callback, NULL,
MHD_OPTION_CONNECTION_LIMIT,
(unsigned int) 128,
MHD_OPTION_PER_IP_CONNECTION_LIMIT,
(unsigned int) 32,
MHD_OPTION_CONNECTION_TIMEOUT,
(unsigned int) 16,
MHD_OPTION_CONNECTION_MEMORY_LIMIT,
(size_t) (16 * 1024),
MHD_OPTION_SOCK_ADDR,
sa6,
MHD_OPTION_END);
daemon_handle_v4 = MHD_start_daemon (MHD_NO_FLAG | MHD_USE_DEBUG,
(uint16_t) port,
&accept_policy_callback, NULL,
&access_handler_callback, NULL,
MHD_OPTION_CONNECTION_LIMIT,
(unsigned int) 128,
MHD_OPTION_PER_IP_CONNECTION_LIMIT,
(unsigned int) 32,
MHD_OPTION_CONNECTION_TIMEOUT,
(unsigned int) 16,
MHD_OPTION_CONNECTION_MEMORY_LIMIT,
(size_t) (16 * 1024),
MHD_OPTION_SOCK_ADDR,
sa4,
MHD_OPTION_END);
if ( (NULL == daemon_handle_v6) &&
(NULL == daemon_handle_v4) )
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Could not start hostlist HTTP server on port %u\n"),
(unsigned short) port);
return GNUNET_SYSERR;
}
core = co;
*server_ch = &connect_handler;
if (NULL != daemon_handle_v4)
hostlist_task_v4 = prepare_daemon (daemon_handle_v4);
if (NULL != daemon_handle_v6)
hostlist_task_v6 = prepare_daemon (daemon_handle_v6);
notify = GNUNET_PEERINFO_notify (cfg,
GNUNET_NO,
&process_notify, NULL);
return GNUNET_OK;
}
/**
* Stop server offering our hostlist.
*/
void
GNUNET_HOSTLIST_server_stop ()
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Hostlist server shutdown\n");
if (NULL != hostlist_task_v6)
{
GNUNET_SCHEDULER_cancel (hostlist_task_v6);
hostlist_task_v6 = NULL;
}
if (NULL != hostlist_task_v4)
{
GNUNET_SCHEDULER_cancel (hostlist_task_v4);
hostlist_task_v4 = NULL;
}
if (NULL != daemon_handle_v4)
{
MHD_stop_daemon (daemon_handle_v4);
daemon_handle_v4 = NULL;
}
if (NULL != daemon_handle_v6)
{
MHD_stop_daemon (daemon_handle_v6);
daemon_handle_v6 = NULL;
}
if (NULL != response)
{
MHD_destroy_response (response);
response = NULL;
}
if (NULL != notify)
{
GNUNET_PEERINFO_notify_cancel (notify);
notify = NULL;
}
if (NULL != builder)
{
if (NULL != builder->pitr)
{
GNUNET_PEERINFO_iterate_cancel (builder->pitr);
builder->pitr = NULL;
}
GNUNET_free_non_null (builder->data);
GNUNET_free (builder);
builder = NULL;
}
if (NULL != peerinfo)
{
GNUNET_PEERINFO_disconnect (peerinfo);
peerinfo = NULL;
}
cfg = NULL;
stats = NULL;
core = NULL;
}
/* end of gnunet-daemon-hostlist_server.c */