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|
/*
This file is part of GNUnet.
Copyright (C) 2012-2014 GNUnet e.V.
GNUnet 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 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.
*/
/**
* @file gnunet-namestore-fcfsd.c
* @brief HTTP daemon that offers first-come-first-serve GNS domain registration
* @author Christian Grothoff
*
* TODO:
* - need to track active zone info requests so we can cancel them
* during shutdown, right?
* - the code currently contains a 'race' between checking that the
* domain name is available and allocating it to the new public key
* (should this race be solved by namestore or by fcfsd?)
* - nicer error reporting to browser
*/
#include "platform.h"
#include <microhttpd.h>
#include "gnunet_util_lib.h"
#include "gnunet_identity_service.h"
#include "gnunet_gnsrecord_lib.h"
#include "gnunet_namestore_service.h"
/**
* Invalid method page.
*/
#define METHOD_ERROR "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\"><html><head><title>Illegal request</title></head><body>Go away.</body></html>"
/**
* Front page. (/)
*/
#define MAIN_PAGE "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\"><html><head><title>GNUnet FCFS Authority Name Registration Service</title></head><body><form action=\"S\" method=\"post\">What is your desired domain name? (at most 63 lowercase characters, no dots allowed.) <input type=\"text\" name=\"domain\" /> <p> What is your public key? (Copy from gnunet-setup.) <input type=\"text\" name=\"pkey\" /> <input type=\"submit\" value=\"Next\" /><br/><a href=./Zoneinfo> List of all registered names </a></body></html>"
/**
* Second page (/S)
*/
#define SUBMIT_PAGE "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\"><html><head><title>%s</title></head><body>%s</body></html>"
/**
* Fcfs zoneinfo page (/Zoneinfo)
*/
#define ZONEINFO_PAGE "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"><html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\"><html><head><title>FCFS Zoneinfo</title></head><body><h1> FCFS Zoneinfo </h1><table border=\"1\"><th>name</th><th>PKEY</th>%s</table></body></html>"
#define FCFS_ZONEINFO_URL "/Zoneinfo"
/**
* Mime type for HTML pages.
*/
#define MIME_HTML "text/html"
/**
* Name of our cookie.
*/
#define COOKIE_NAME "namestore-fcfsd"
#define DEFAULT_ZONEINFO_BUFSIZE 2048
/**
* Phases a request goes through.
*/
enum Phase
{
/**
* Start phase (parsing POST, checking).
*/
RP_START = 0,
/**
* Lookup to see if the domain name is taken.
*/
RP_LOOKUP,
/**
* Storing of the record.
*/
RP_PUT,
/**
* We're done with success.
*/
RP_SUCCESS,
/**
* Send failure message.
*/
RP_FAIL
};
/**
* Data kept per request.
*/
struct Request
{
/**
* Associated session.
*/
// FIXME: struct Session *session;
/**
* Post processor handling form data (IF this is
* a POST request).
*/
struct MHD_PostProcessor *pp;
/**
* URL to serve in response to this POST (if this request
* was a 'POST')
*/
const char *post_url;
/**
* Active request with the namestore.
*/
struct GNUNET_NAMESTORE_QueueEntry *qe;
/**
* Active iteration with the namestore.
*/
struct GNUNET_NAMESTORE_ZoneIterator *zi;
/**
* Current processing phase.
*/
enum Phase phase;
/**
* Domain name submitted via form.
*/
char domain_name[64];
/**
* Public key submitted via form.
*/
char public_key[128];
struct GNUNET_CRYPTO_EcdsaPublicKey pub;
};
/**
* Zoneinfo request
*/
struct ZoneinfoRequest
{
/**
* Connection
*/
struct MHD_Connection *connection;
/**
* List iterator
*/
struct GNUNET_NAMESTORE_ZoneIterator *list_it;
/**
* Buffer
*/
char* zoneinfo;
/**
* Buffer length
*/
size_t buf_len;
/**
* Buffer write offset
*/
size_t write_offset;
};
/**
* MHD deamon reference.
*/
static struct MHD_Daemon *httpd;
/**
* Main HTTP task.
*/
static struct GNUNET_SCHEDULER_Task * httpd_task;
/**
* Handle to the namestore.
*/
static struct GNUNET_NAMESTORE_Handle *ns;
/**
* Private key for the fcfsd zone.
*/
static struct GNUNET_CRYPTO_EcdsaPrivateKey fcfs_zone_pkey;
/**
* Connection to identity service.
*/
static struct GNUNET_IDENTITY_Handle *identity;
/**
* Request for our ego.
*/
static struct GNUNET_IDENTITY_Operation *id_op;
/**
* Port we use for the HTTP server.
*/
static unsigned long long port;
/**
* Name of the zone we manage.
*/
static char *zone;
/**
* Task run whenever HTTP server operations are pending.
*
* @param cls unused
*/
static void
do_httpd (void *cls);
/**
* Schedule task to run MHD server now.
*/
static void
run_httpd_now ()
{
if (NULL != httpd_task)
{
GNUNET_SCHEDULER_cancel (httpd_task);
httpd_task = NULL;
}
httpd_task = GNUNET_SCHEDULER_add_now (&do_httpd, NULL);
}
/**
* Function called on error in zone iteration.
*/
static void
zone_iteration_error (void *cls)
{
struct ZoneinfoRequest *zr = cls;
struct MHD_Response *response;
zr->list_it = NULL;
response = MHD_create_response_from_buffer (strlen ("internal error"),
(void *) "internal error",
MHD_RESPMEM_PERSISTENT);
MHD_queue_response (zr->connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
response);
MHD_destroy_response (response);
GNUNET_free (zr->zoneinfo);
GNUNET_free (zr);
run_httpd_now ();
}
/**
* Function called once the zone iteration is done.
*/
static void
zone_iteration_end (void *cls)
{
struct ZoneinfoRequest *zr = cls;
struct MHD_Response *response;
char* full_page;
zr->list_it = NULL;
/* return static form */
GNUNET_asprintf (&full_page,
ZONEINFO_PAGE,
zr->zoneinfo,
zr->zoneinfo);
response = MHD_create_response_from_buffer (strlen (full_page),
(void *) full_page,
MHD_RESPMEM_MUST_FREE);
MHD_add_response_header (response,
MHD_HTTP_HEADER_CONTENT_TYPE,
MIME_HTML);
MHD_queue_response (zr->connection,
MHD_HTTP_OK,
response);
MHD_destroy_response (response);
GNUNET_free (zr->zoneinfo);
GNUNET_free (zr);
run_httpd_now ();
}
/**
* Process a record that was stored in the namestore, adding
* the information to the HTML.
*
* @param cls closure with the `struct ZoneinfoRequest *`
* @param zone_key private key of the zone; NULL on disconnect
* @param name label of the records; NULL on disconnect
* @param rd_len number of entries in @a rd array, 0 if label was deleted
* @param rd array of records with data to store
*/
static void
iterate_cb (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
const char *name,
unsigned int rd_len,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct ZoneinfoRequest *zr = cls;
size_t bytes_free;
char* pkey;
char* new_buf;
(void) zone_key;
if (1 != rd_len)
{
GNUNET_NAMESTORE_zone_iterator_next (zr->list_it,
1);
return;
}
if (GNUNET_GNSRECORD_TYPE_PKEY != rd->record_type)
{
GNUNET_NAMESTORE_zone_iterator_next (zr->list_it,
1);
return;
}
bytes_free = zr->buf_len - zr->write_offset;
pkey = GNUNET_GNSRECORD_value_to_string (rd->record_type,
rd->data,
rd->data_size);
if (NULL == pkey)
{
GNUNET_break (0);
GNUNET_NAMESTORE_zone_iterator_next (zr->list_it,
1);
return;
}
if (bytes_free < (strlen (name) + strlen (pkey) + 40))
{
new_buf = GNUNET_malloc (zr->buf_len * 2);
GNUNET_memcpy (new_buf, zr->zoneinfo, zr->write_offset);
GNUNET_free (zr->zoneinfo);
zr->zoneinfo = new_buf;
zr->buf_len *= 2;
}
sprintf (zr->zoneinfo + zr->write_offset,
"<tr><td>%s</td><td>%s</td></tr>",
name,
pkey);
zr->write_offset = strlen (zr->zoneinfo);
GNUNET_NAMESTORE_zone_iterator_next (zr->list_it,
1);
GNUNET_free (pkey);
}
/**
* Handler that returns FCFS zoneinfo page.
*
* @param connection connection to use
* @return MHD_YES on success
*/
static int
serve_zoneinfo_page (struct MHD_Connection *connection)
{
struct ZoneinfoRequest *zr;
zr = GNUNET_new (struct ZoneinfoRequest);
zr->zoneinfo = GNUNET_malloc (DEFAULT_ZONEINFO_BUFSIZE);
zr->buf_len = DEFAULT_ZONEINFO_BUFSIZE;
zr->connection = connection;
zr->write_offset = 0;
zr->list_it = GNUNET_NAMESTORE_zone_iteration_start (ns,
&fcfs_zone_pkey,
&zone_iteration_error,
zr,
&iterate_cb,
zr,
&zone_iteration_end,
zr);
return MHD_YES;
}
/**
* Handler that returns a simple static HTTP page.
*
* @param connection connection to use
* @return MHD_YES on success
*/
static int
serve_main_page (struct MHD_Connection *connection)
{
int ret;
struct MHD_Response *response;
/* return static form */
response = MHD_create_response_from_buffer (strlen (MAIN_PAGE),
(void *) MAIN_PAGE,
MHD_RESPMEM_PERSISTENT);
MHD_add_response_header (response,
MHD_HTTP_HEADER_CONTENT_TYPE,
MIME_HTML);
ret = MHD_queue_response (connection,
MHD_HTTP_OK,
response);
MHD_destroy_response (response);
return ret;
}
/**
* Send the 'SUBMIT_PAGE'.
*
* @param info information string to send to the user
* @param request request information
* @param connection connection to use
*/
static int
fill_s_reply (const char *info,
struct Request *request,
struct MHD_Connection *connection)
{
int ret;
char *reply;
struct MHD_Response *response;
(void) request;
GNUNET_asprintf (&reply,
SUBMIT_PAGE,
info,
info);
/* return static form */
response = MHD_create_response_from_buffer (strlen (reply),
(void *) reply,
MHD_RESPMEM_MUST_FREE);
MHD_add_response_header (response,
MHD_HTTP_HEADER_CONTENT_TYPE,
MIME_HTML);
ret = MHD_queue_response (connection,
MHD_HTTP_OK,
response);
MHD_destroy_response (response);
return ret;
}
/**
* Iterator over key-value pairs where the value
* maybe made available in increments and/or may
* not be zero-terminated. Used for processing
* POST data.
*
* @param cls user-specified closure
* @param kind type of the value
* @param key 0-terminated key for the value
* @param filename name of the uploaded file, NULL if not known
* @param content_type mime-type of the data, NULL if not known
* @param transfer_encoding encoding of the data, NULL if not known
* @param data pointer to size bytes of data at the
* specified offset
* @param off offset of data in the overall value
* @param size number of bytes in data available
* @return MHD_YES to continue iterating,
* MHD_NO to abort the iteration
*/
static int
post_iterator (void *cls,
enum MHD_ValueKind kind,
const char *key,
const char *filename,
const char *content_type,
const char *transfer_encoding,
const char *data,
uint64_t off,
size_t size)
{
struct Request *request = cls;
(void) kind;
(void) filename;
(void) content_type;
(void) transfer_encoding;
if (0 == strcmp ("domain", key))
{
if (size + off >= sizeof(request->domain_name))
size = sizeof (request->domain_name) - off - 1;
GNUNET_memcpy (&request->domain_name[off],
data,
size);
request->domain_name[size+off] = '\0';
return MHD_YES;
}
if (0 == strcmp ("pkey", key))
{
if (size + off >= sizeof(request->public_key))
size = sizeof (request->public_key) - off - 1;
GNUNET_memcpy (&request->public_key[off],
data,
size);
request->public_key[size+off] = '\0';
return MHD_YES;
}
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Unsupported form value `%s'\n"),
key);
return MHD_YES;
}
/**
* Continuation called to notify client about result of the
* operation.
*
* @param cls closure
* @param success #GNUNET_SYSERR on failure (including timeout/queue drop/failure to validate)
* #GNUNET_NO if content was already there
* #GNUNET_YES (or other positive value) on success
* @param emsg NULL on success, otherwise an error message
*/
static void
put_continuation (void *cls,
int32_t success,
const char *emsg)
{
struct Request *request = cls;
request->qe = NULL;
if (0 >= success)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Failed to create record for domain `%s': %s\n"),
request->domain_name,
emsg);
request->phase = RP_FAIL;
}
else
request->phase = RP_SUCCESS;
run_httpd_now ();
}
/**
* Function called if we had an error in zone-to-name mapping.
*/
static void
zone_to_name_error (void *cls)
{
struct Request *request = cls;
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Error when mapping zone to name\n"));
request->phase = RP_FAIL;
run_httpd_now ();
}
/**
* Test if a name mapping was found, if so, refuse. If not, initiate storing of the record.
*
* @param cls closure
* @param zone_key public key of the zone
* @param name name that is being mapped (at most 255 characters long)
* @param rd_count number of entries in @a rd array
* @param rd array of records with data to store
*/
static void
zone_to_name_cb (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
const char *name,
unsigned int rd_count,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct Request *request = cls;
struct GNUNET_GNSRECORD_Data r;
(void) rd;
(void) zone_key;
request->qe = NULL;
if (0 != rd_count)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Found existing name `%s' for the given key\n"),
name);
request->phase = RP_FAIL;
run_httpd_now ();
return;
}
r.data = &request->pub;
r.data_size = sizeof (request->pub);
r.expiration_time = UINT64_MAX;
r.record_type = GNUNET_GNSRECORD_TYPE_PKEY;
r.flags = GNUNET_GNSRECORD_RF_NONE;
request->qe = GNUNET_NAMESTORE_records_store (ns,
&fcfs_zone_pkey,
request->domain_name,
1, &r,
&put_continuation,
request);
}
/**
* We encountered an error in the name lookup.
*/
static void
lookup_block_error (void *cls)
{
struct Request *request = cls;
request->qe = NULL;
request->phase = RP_FAIL;
run_httpd_now ();
}
/**
* We got a block back from the namestore. Decrypt it
* and continue to process the result.
*
* @param cls the 'struct Request' we are processing
* @param zonekey private key of the zone; NULL on disconnect
* @param label label of the records; NULL on disconnect
* @param rd_count number of entries in @a rd array, 0 if label was deleted
* @param rd array of records with data to store
*/
static void
lookup_block_processor (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zonekey,
const char *label,
unsigned int rd_count,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct Request *request = cls;
(void) label;
(void) rd;
(void) zonekey;
request->qe = NULL;
if (0 == rd_count)
{
if (GNUNET_OK !=
GNUNET_CRYPTO_ecdsa_public_key_from_string (request->public_key,
strlen (request->public_key),
&request->pub))
{
GNUNET_break (0);
request->phase = RP_FAIL;
run_httpd_now ();
return;
}
request->qe = GNUNET_NAMESTORE_zone_to_name (ns,
&fcfs_zone_pkey,
&request->pub,
&zone_to_name_error,
request,
&zone_to_name_cb,
request);
return;
}
GNUNET_break (0 != rd_count);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Found %u existing records for domain `%s'\n"),
rd_count,
request->domain_name);
request->phase = RP_FAIL;
run_httpd_now ();
return;
}
/**
* Main MHD callback for handling requests.
*
* @param cls unused
* @param connection MHD connection handle
* @param url the requested url
* @param method the HTTP method used ("GET", "PUT", etc.)
* @param version the HTTP version string (i.e. "HTTP/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
* 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 ptr pointer to location where we store the 'struct Request'
* @return MHD_YES if the connection was handled successfully,
* MHD_NO if the socket must be closed due to a serious
* error while handling the request
*/
static int
create_response (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 **ptr)
{
struct MHD_Response *response;
struct Request *request;
struct GNUNET_CRYPTO_EcdsaPublicKey pub;
int ret;
(void) cls;
(void) version;
if ( (0 == strcmp (method, MHD_HTTP_METHOD_GET)) ||
(0 == strcmp (method, MHD_HTTP_METHOD_HEAD)) )
{
if (0 == strcmp (url, FCFS_ZONEINFO_URL))
ret = serve_zoneinfo_page (connection);
else
ret = serve_main_page (connection);
if (ret != MHD_YES)
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to create page for `%s'\n"),
url);
return ret;
}
if (0 == strcmp (method, MHD_HTTP_METHOD_POST))
{
request = *ptr;
if (NULL == request)
{
request = GNUNET_new (struct Request);
*ptr = request;
request->pp = MHD_create_post_processor (connection,
1024,
&post_iterator,
request);
if (NULL == request->pp)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to setup post processor for `%s'\n"),
url);
return MHD_NO; /* internal error */
}
return MHD_YES;
}
if (NULL != request->pp)
{
/* evaluate POST data */
MHD_post_process (request->pp,
upload_data,
*upload_data_size);
if (0 != *upload_data_size)
{
*upload_data_size = 0;
return MHD_YES;
}
/* done with POST data, serve response */
MHD_destroy_post_processor (request->pp);
request->pp = NULL;
}
if (GNUNET_OK !=
GNUNET_CRYPTO_ecdsa_public_key_from_string (request->public_key,
strlen (request->public_key),
&pub))
{
/* parse error */
return fill_s_reply ("Failed to parse given public key",
request, connection);
}
switch (request->phase)
{
case RP_START:
if (NULL != strchr (request->domain_name, (int) '.'))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Domain name must not contain `.'\n"));
request->phase = RP_FAIL;
return fill_s_reply ("Domain name must not contain `.', sorry.",
request,
connection);
}
if (NULL != strchr (request->domain_name, (int) '+'))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Domain name must not contain `+'\n"));
request->phase = RP_FAIL;
return fill_s_reply ("Domain name must not contain `+', sorry.",
request, connection);
}
request->phase = RP_LOOKUP;
request->qe
= GNUNET_NAMESTORE_records_lookup (ns,
&fcfs_zone_pkey,
request->domain_name,
&lookup_block_error,
request,
&lookup_block_processor,
request);
break;
case RP_LOOKUP:
break;
case RP_PUT:
break;
case RP_FAIL:
return fill_s_reply ("Request failed, sorry.",
request, connection);
case RP_SUCCESS:
return fill_s_reply ("Success.",
request, connection);
default:
GNUNET_break (0);
return MHD_NO;
}
return MHD_YES; /* will have a reply later... */
}
/* unsupported HTTP method */
response = MHD_create_response_from_buffer (strlen (METHOD_ERROR),
(void *) METHOD_ERROR,
MHD_RESPMEM_PERSISTENT);
ret = MHD_queue_response (connection,
MHD_HTTP_NOT_ACCEPTABLE,
response);
MHD_destroy_response (response);
return ret;
}
/**
* Callback called upon completion of a request.
* Decrements session reference counter.
*
* @param cls not used
* @param connection connection that completed
* @param con_cls session handle
* @param toe status code
*/
static void
request_completed_callback (void *cls,
struct MHD_Connection *connection,
void **con_cls,
enum MHD_RequestTerminationCode toe)
{
struct Request *request = *con_cls;
(void) cls;
(void) connection;
(void) toe;
if (NULL == request)
return;
if (NULL != request->pp)
MHD_destroy_post_processor (request->pp);
if (NULL != request->qe)
GNUNET_NAMESTORE_cancel (request->qe);
GNUNET_free (request);
}
#define UNSIGNED_MHD_LONG_LONG unsigned MHD_LONG_LONG
/**
* Schedule tasks to run MHD server.
*/
static void
run_httpd ()
{
fd_set rs;
fd_set ws;
fd_set es;
struct GNUNET_NETWORK_FDSet *wrs;
struct GNUNET_NETWORK_FDSet *wws;
struct GNUNET_NETWORK_FDSet *wes;
int max;
int haveto;
UNSIGNED_MHD_LONG_LONG timeout;
struct GNUNET_TIME_Relative tv;
FD_ZERO (&rs);
FD_ZERO (&ws);
FD_ZERO (&es);
wrs = GNUNET_NETWORK_fdset_create ();
wes = GNUNET_NETWORK_fdset_create ();
wws = GNUNET_NETWORK_fdset_create ();
max = -1;
GNUNET_assert (MHD_YES ==
MHD_get_fdset (httpd,
&rs,
&ws,
&es,
&max));
haveto = MHD_get_timeout (httpd,
&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);
GNUNET_NETWORK_fdset_copy_native (wes,
&es,
max + 1);
httpd_task =
GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
tv,
wrs,
wws,
&do_httpd,
NULL);
GNUNET_NETWORK_fdset_destroy (wrs);
GNUNET_NETWORK_fdset_destroy (wws);
GNUNET_NETWORK_fdset_destroy (wes);
}
/**
* Task run whenever HTTP server operations are pending.
*
* @param cls unused
*/
static void
do_httpd (void *cls)
{
(void) cls;
httpd_task = NULL;
MHD_run (httpd);
run_httpd ();
}
/**
* Task run on shutdown. Cleans up everything.
*
* @param cls unused
*/
static void
do_shutdown (void *cls)
{
(void) cls;
if (NULL != httpd_task)
{
GNUNET_SCHEDULER_cancel (httpd_task);
httpd_task = NULL;
}
if (NULL != ns)
{
GNUNET_NAMESTORE_disconnect (ns);
ns = NULL;
}
if (NULL != httpd)
{
MHD_stop_daemon (httpd);
httpd = NULL;
}
if (NULL != id_op)
{
GNUNET_IDENTITY_cancel (id_op);
id_op = NULL;
}
if (NULL != identity)
{
GNUNET_IDENTITY_disconnect (identity);
identity = NULL;
}
}
/**
* Method called to inform about the egos of this peer.
*
* When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
* this function is only called ONCE, and 'NULL' being passed in
* @a ego does indicate an error (i.e. name is taken or no default
* value is known). If @a ego is non-NULL and if '*ctx'
* is set in those callbacks, the value WILL be passed to a subsequent
* call to the identity callback of #GNUNET_IDENTITY_connect (if
* that one was not NULL).
*
* @param cls closure, NULL
* @param ego ego handle
* @param ctx context for application to store data for this ego
* (during the lifetime of this process, initially NULL)
* @param name name assigned by the user for this ego,
* NULL if the user just deleted the ego and it
* must thus no longer be used
*/
static void
identity_cb (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *name)
{
int options;
(void) cls;
(void) ctx;
(void) name;
id_op = NULL;
if (NULL == ego)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("No ego configured for `fcfsd` subsystem\n"));
return;
}
fcfs_zone_pkey = *GNUNET_IDENTITY_ego_get_private_key (ego);
options = MHD_USE_DUAL_STACK | MHD_USE_DEBUG;
do
{
httpd = MHD_start_daemon (options,
(uint16_t) port,
NULL, NULL,
&create_response, NULL,
MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 128,
MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (4 * 1024),
MHD_OPTION_NOTIFY_COMPLETED, &request_completed_callback, NULL,
MHD_OPTION_END);
if (MHD_USE_DEBUG == options)
break;
options = MHD_USE_DEBUG;
}
while (NULL == httpd);
if (NULL == httpd)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to start HTTP server\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
run_httpd ();
}
/**
* Main function that will be run.
*
* @param cls closure
* @param args remaining command-line arguments
* @param cfgfile name of the configuration file used (for saving, can be NULL!)
* @param cfg configuration
*/
static void
run (void *cls,
char *const *args,
const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
(void) cls;
(void) args;
(void) cfgfile;
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_number (cfg,
"fcfsd",
"HTTPPORT",
&port))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
"fcfsd", "HTTPPORT");
return;
}
ns = GNUNET_NAMESTORE_connect (cfg);
if (NULL == ns)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to connect to namestore\n"));
return;
}
identity = GNUNET_IDENTITY_connect (cfg,
NULL, NULL);
if (NULL == identity)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to connect to identity\n"));
return;
}
id_op = GNUNET_IDENTITY_get (identity,
zone,
&identity_cb,
NULL);
GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
NULL);
}
/**
* The main function for the fcfs daemon.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
*/
int
main (int argc,
char *const *argv)
{
struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_option_mandatory
(GNUNET_GETOPT_option_string ('z',
"zone",
"EGO",
gettext_noop ("name of the zone that is to be managed by FCFSD"),
&zone)),
GNUNET_GETOPT_OPTION_END
};
int ret;
if (GNUNET_OK !=
GNUNET_STRINGS_get_utf8_args (argc, argv,
&argc, &argv))
return 2;
GNUNET_log_setup ("fcfsd",
"WARNING",
NULL);
ret =
(GNUNET_OK ==
GNUNET_PROGRAM_run (argc,
argv,
"gnunet-namestore-fcfsd",
_("GNU Name System First Come First Serve name registration service"),
options,
&run, NULL)) ? 0 : 1;
GNUNET_free ((void*) argv);
GNUNET_CRYPTO_ecdsa_key_clear (&fcfs_zone_pkey);
return ret;
}
/* end of gnunet-namestore-fcfsd.c */
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