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|
/*
This file is part of GNUnet
(C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
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, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file transport/plugin_transport_http.c
* @brief http transport service plugin
* @author Matthias Wachs
*/
#include "plugin_transport_http.h"
#define HTTP_ERROR_RESPONSE "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD><BODY><H1>Not Found</H1>The requested URL was not found on this server.<P><HR><ADDRESS></ADDRESS></BODY></HTML>"
#define _RECEIVE 0
#define _SEND 1
struct ServerConnection
{
/* _RECV or _SEND */
int direction;
/* should this connection get disconnected? GNUNET_YES/NO */
int disconnect;
struct Session *session;
struct MHD_Connection *mhd_conn;
};
/**
* Function that queries MHD's select sets and
* starts the task waiting for them.
* @param plugin plugin
* @param daemon_handle the MHD daemon handle
* @param now schedule now or with MHD delay
* @return gnunet task identifier
*/
static GNUNET_SCHEDULER_TaskIdentifier
server_schedule (struct Plugin *plugin,
struct MHD_Daemon *daemon_handle,
int now);
static void
server_log (void *arg, const char *fmt, va_list ap)
{
char text[1024];
vsnprintf (text, sizeof (text), fmt, ap);
va_end (ap);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Server: %s\n", text);
}
/**
* Check if incoming connection is accepted.
* NOTE: Here every connection is accepted
* @param cls plugin as closure
* @param addr address of incoming connection
* @param addr_len address length of incoming connection
* @return MHD_YES if connection is accepted, MHD_NO if connection is rejected
*
*/
static int
server_accept_cb (void *cls, const struct sockaddr *addr, socklen_t addr_len)
{
struct Plugin *plugin = cls;
if (plugin->cur_connections <= plugin->max_connections)
return MHD_YES;
else
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Server: Cannot accept new connections\n");
return MHD_NO;
}
}
#if BUILD_HTTPS
static char *
server_load_file (const char *file)
{
struct GNUNET_DISK_FileHandle *gn_file;
struct stat fstat;
char *text = NULL;
if (0 != STAT (file, &fstat))
return NULL;
text = GNUNET_malloc (fstat.st_size + 1);
gn_file =
GNUNET_DISK_file_open (file, GNUNET_DISK_OPEN_READ,
GNUNET_DISK_PERM_USER_READ);
if (gn_file == NULL)
{
GNUNET_free (text);
return NULL;
}
if (GNUNET_SYSERR == GNUNET_DISK_file_read (gn_file, text, fstat.st_size))
{
GNUNET_free (text);
GNUNET_DISK_file_close (gn_file);
return NULL;
}
text[fstat.st_size] = '\0';
GNUNET_DISK_file_close (gn_file);
return text;
}
#endif
#if BUILD_HTTPS
static int
server_load_certificate (struct Plugin *plugin)
{
int res = GNUNET_OK;
char *key_file;
char *cert_file;
/* Get crypto init string from config
* If not present just use default values */
GNUNET_assert (GNUNET_OK ==
GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
plugin->name,
"CRYPTO_INIT",
&plugin->crypto_init));
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_filename (plugin->env->cfg, plugin->name,
"KEY_FILE", &key_file))
{
key_file = GNUNET_strdup ("https_key.key");
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_filename (plugin->env->cfg, plugin->name,
"CERT_FILE", &cert_file))
{
GNUNET_asprintf (&cert_file, "%s", "https_cert.crt");
}
/* read key & certificates from file */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Loading TLS certificate from key-file `%s' cert-file`%s'\n",
key_file, cert_file);
plugin->key = server_load_file (key_file);
plugin->cert = server_load_file (cert_file);
if ((plugin->key == NULL) || (plugin->cert == NULL))
{
struct GNUNET_OS_Process *cert_creation;
GNUNET_free_non_null (plugin->key);
plugin->key = NULL;
GNUNET_free_non_null (plugin->cert);
plugin->cert = NULL;
#if VERBOSE_SERVER
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"No usable TLS certificate found, creating certificate\n");
#endif
errno = 0;
cert_creation =
GNUNET_OS_start_process (GNUNET_NO, NULL, NULL,
"gnunet-transport-certificate-creation",
"gnunet-transport-certificate-creation",
key_file, cert_file, NULL);
if (cert_creation == NULL)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
_
("Could not create a new TLS certificate, program `gnunet-transport-certificate-creation' could not be started!\n"));
GNUNET_free (key_file);
GNUNET_free (cert_file);
GNUNET_free_non_null (plugin->key);
plugin->key = NULL;
GNUNET_free_non_null (plugin->cert);
plugin->cert = NULL;
GNUNET_free_non_null (plugin->crypto_init);
plugin->crypto_init = NULL;
return GNUNET_SYSERR;
}
GNUNET_assert (GNUNET_OK == GNUNET_OS_process_wait (cert_creation));
GNUNET_OS_process_close (cert_creation);
plugin->key = server_load_file (key_file);
plugin->cert = server_load_file (cert_file);
}
if ((plugin->key == NULL) || (plugin->cert == NULL))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
_
("No usable TLS certificate found and creating one failed!\n"),
"transport-https");
GNUNET_free (key_file);
GNUNET_free (cert_file);
GNUNET_free_non_null (plugin->key);
plugin->key = NULL;
GNUNET_free_non_null (plugin->cert);
plugin->cert = NULL;
GNUNET_free_non_null (plugin->crypto_init);
plugin->crypto_init = NULL;
return GNUNET_SYSERR;
}
GNUNET_free (key_file);
GNUNET_free (cert_file);
#if DEBUG_HTTP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TLS certificate loaded\n");
#endif
return res;
}
#endif
/**
* Reschedule the execution of both IPv4 and IPv6 server
* @param plugin the plugin
* @param server which server to schedule v4 or v6?
* @param now GNUNET_YES to schedule execution immediately, GNUNET_NO to wait
* until timeout
*/
static void
server_reschedule (struct Plugin *plugin, struct MHD_Daemon *server, int now)
{
if ((server == plugin->server_v4) && (plugin->server_v4 != NULL))
{
if (plugin->server_v4_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
}
plugin->server_v4_task = server_schedule (plugin, plugin->server_v4, now);
}
if ((server == plugin->server_v6) && (plugin->server_v6 != NULL))
{
if (plugin->server_v6_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
}
plugin->server_v6_task = server_schedule (plugin, plugin->server_v6, now);
}
}
/**
* Callback called by MessageStreamTokenizer when a message has arrived
* @param cls current session as closure
* @param client clien
* @param message the message to be forwarded to transport service
*/
static void
server_receive_mst_cb (void *cls, void *client,
const struct GNUNET_MessageHeader *message)
{
struct Session *s = cls;
struct Plugin *plugin = s->plugin;
struct GNUNET_TIME_Relative delay;
delay = http_plugin_receive (s, &s->target, message, s, s->addr, s->addrlen);
s->next_receive =
GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), delay);
if (delay.rel_value > 0)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: peer `%s' address `%s' next read delayed for %llu ms\n",
GNUNET_i2s (&s->target),
http_plugin_address_to_string (NULL, s->addr, s->addrlen),
delay);
}
}
/**
* Callback called by MHD when it needs data to send
* @param cls current session
* @param pos position in buffer
* @param buf the buffer to write data to
* @param max max number of bytes available in buffer
* @return bytes written to buffer
*/
static ssize_t
server_send_callback (void *cls, uint64_t pos, char *buf, size_t max)
{
struct Session *s = cls;
struct HTTP_Message *msg;
int bytes_read = 0;
//static int c = 0;
msg = s->msg_head;
if (msg != NULL)
{
/* sending */
if ((msg->size - msg->pos) <= max)
{
memcpy (buf, &msg->buf[msg->pos], (msg->size - msg->pos));
bytes_read = msg->size - msg->pos;
msg->pos += (msg->size - msg->pos);
}
else
{
memcpy (buf, &msg->buf[msg->pos], max);
msg->pos += max;
bytes_read = max;
}
/* removing message */
if (msg->pos == msg->size)
{
if (NULL != msg->transmit_cont)
msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_OK);
GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
GNUNET_free (msg);
}
}
struct Plugin *plugin = s->plugin;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: %X: sent %u bytes\n", s, bytes_read);
return bytes_read;
}
static struct ServerConnection *
server_lookup_session (struct Plugin *plugin,
struct MHD_Connection *mhd_connection, const char *url,
const char *method)
{
struct Session *s = NULL;
struct Session *t;
struct ServerConnection *sc = NULL;
const union MHD_ConnectionInfo *conn_info;
struct GNUNET_ATS_Information ats;
struct IPv4HttpAddress a4;
struct IPv6HttpAddress a6;
struct sockaddr_in *s4;
struct sockaddr_in6 *s6;
void *a;
size_t a_len;
struct GNUNET_PeerIdentity target;
int check = GNUNET_NO;
uint32_t tag = 0;
int direction = GNUNET_SYSERR;
conn_info =
MHD_get_connection_info (mhd_connection,
MHD_CONNECTION_INFO_CLIENT_ADDRESS);
if ((conn_info->client_addr->sa_family != AF_INET) &&
(conn_info->client_addr->sa_family != AF_INET6))
return MHD_NO;
if ((strlen (&url[1]) >= 105) && (url[104] == ';'))
{
char hash[104];
char *tagc = (char *) &url[105];
memcpy (&hash, &url[1], 103);
hash[103] = '\0';
if (GNUNET_OK ==
GNUNET_CRYPTO_hash_from_string ((const char *) &hash,
&(target.hashPubKey)))
{
tag = strtoul (tagc, NULL, 10);
if (tagc > 0)
check = GNUNET_YES;
}
}
if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
direction = _RECEIVE;
else if (0 == strcmp (MHD_HTTP_METHOD_GET, method))
direction = _SEND;
else
{
GNUNET_break_op (0);
goto error;
}
if (check == GNUNET_NO)
goto error;
plugin->cur_connections++;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: New inbound connection from %s with tag %u\n",
GNUNET_i2s (&target), tag);
/* find duplicate session */
t = plugin->head;
while (t != NULL)
{
if ((t->inbound) &&
(0 == memcmp (&t->target, &target, sizeof (struct GNUNET_PeerIdentity)))
&&
/* FIXME add source address comparison */
(t->tag == tag))
break;
t = t->next;
}
if (t != NULL)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Duplicate session, dismissing new connection from peer `%s'\n",
GNUNET_i2s (&target));
goto error;
}
/* find semi-session */
t = plugin->server_semi_head;
while (t != NULL)
{
/* FIXME add source address comparison */
if ((0 == memcmp (&t->target, &target, sizeof (struct GNUNET_PeerIdentity)))
&& (t->tag == tag))
{
break;
}
t = t->next;
}
if (t == NULL)
goto create;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Found existing semi-session for `%s'\n",
GNUNET_i2s (&target));
if ((direction == _SEND) && (t->server_send != NULL))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Duplicate GET session, dismissing new connection from peer `%s'\n",
GNUNET_i2s (&target));
goto error;
}
else
{
s = t;
GNUNET_CONTAINER_DLL_remove (plugin->server_semi_head,
plugin->server_semi_tail, s);
GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Found matching semi-session, merging session for peer `%s'\n",
GNUNET_i2s (&target));
goto found;
}
if ((direction == _RECEIVE) && (t->server_recv != NULL))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Duplicate PUT session, dismissing new connection from peer `%s'\n",
GNUNET_i2s (&target));
goto error;
}
else
{
s = t;
GNUNET_CONTAINER_DLL_remove (plugin->server_semi_head,
plugin->server_semi_tail, s);
GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Found matching semi-session, merging session for peer `%s'\n",
GNUNET_i2s (&target));
goto found;
}
create:
/* create new session */
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Creating new session for peer `%s' \n",
GNUNET_i2s (&target));
switch (conn_info->client_addr->sa_family)
{
case (AF_INET):
s4 = ((struct sockaddr_in *) conn_info->client_addr);
a4.u4_port = s4->sin_port;
memcpy (&a4.ipv4_addr, &s4->sin_addr, sizeof (struct in_addr));
a = &a4;
a_len = sizeof (struct IPv4HttpAddress);
ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) s4, sizeof (struct sockaddr_in));
break;
case (AF_INET6):
s6 = ((struct sockaddr_in6 *) conn_info->client_addr);
a6.u6_port = s6->sin6_port;
memcpy (&a6.ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr));
a = &a6;
a_len = sizeof (struct IPv6HttpAddress);
ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) s6, sizeof (struct sockaddr_in6));
break;
default:
GNUNET_break (0);
goto error;
}
s = create_session (plugin, &target, a, a_len, NULL, NULL);
s->ats_address_network_type = ats.value;
s->inbound = GNUNET_YES;
s->next_receive = GNUNET_TIME_absolute_get_zero ();
s->tag = tag;
if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
s->server_recv = s;
if (0 == strcmp (MHD_HTTP_METHOD_GET, method))
s->server_send = s;
GNUNET_CONTAINER_DLL_insert (plugin->server_semi_head,
plugin->server_semi_tail, s);
goto found;
error:
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Invalid connection request\n");
return NULL;
found:
sc = GNUNET_malloc (sizeof (struct ServerConnection));
sc->mhd_conn = mhd_connection;
sc->direction = direction;
sc->session = s;
if (direction == _SEND)
s->server_send = sc;
if (direction == _RECEIVE)
s->server_recv = sc;
#if MHD_VERSION >= 0x00090E00
int to = (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value / 1000);
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Setting timeout for %X to %u sec.\n", sc, to);
MHD_set_connection_option (mhd_connection, MHD_CONNECTION_OPTION_TIMEOUT, to);
struct MHD_Daemon *d = NULL;
if (s->addrlen == sizeof (struct IPv6HttpAddress))
d = plugin->server_v6;
if (s->addrlen == sizeof (struct IPv4HttpAddress))
d = plugin->server_v4;
server_reschedule (plugin, d, GNUNET_NO);
#endif
return sc;
}
/**
* Process GET or PUT request received via MHD. For
* GET, queue response that will send back our pending
* messages. For PUT, process incoming data and send
* to GNUnet core. In either case, check if a session
* already exists and create a new one if not.
*/
static int
server_access_cb (void *cls, struct MHD_Connection *mhd_connection,
const char *url, const char *method, const char *version,
const char *upload_data, size_t * upload_data_size,
void **httpSessionCache)
{
struct Plugin *plugin = cls;
struct ServerConnection *sc = *httpSessionCache;
struct Session *s = NULL;
int res = MHD_YES;
struct MHD_Response *response;
GNUNET_assert (cls != NULL);
/* new connection */
if (sc == NULL)
{
sc = server_lookup_session (plugin, mhd_connection, url, method);
if (sc != NULL)
(*httpSessionCache) = sc;
else
{
response =
MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),
HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
MHD_destroy_response (response);
return res;
}
}
/* existing connection */
sc = (*httpSessionCache);
s = sc->session;
/* connection is to be disconnected */
if (sc->disconnect == GNUNET_YES)
{
/* Sent HTTP/1.1: 200 OK as PUT Response\ */
response =
MHD_create_response_from_data (strlen ("Thank you!"), "Thank you!",
MHD_NO, MHD_NO);
res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
MHD_destroy_response (response);
return MHD_YES;
}
GNUNET_assert (s != NULL);
/* Check if both directions are connected */
if ((sc->session->server_recv == NULL) || (sc->session->server_send == NULL))
{
/* Delayed read from since not both semi-connections are connected */
return MHD_YES;
}
if (sc->direction == _SEND)
{
response =
MHD_create_response_from_callback (-1, 32 * 1024, &server_send_callback,
s, NULL);
MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
MHD_destroy_response (response);
return MHD_YES;
}
if (sc->direction == _RECEIVE)
{
if (*upload_data_size == 0)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Peer `%s' PUT on address `%s' connected\n",
GNUNET_i2s (&s->target),
http_plugin_address_to_string (NULL, s->addr,
s->addrlen));
return MHD_YES;
}
/* Receiving data */
if ((*upload_data_size > 0))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: peer `%s' PUT on address `%s' received %u bytes\n",
GNUNET_i2s (&s->target),
http_plugin_address_to_string (NULL, s->addr,
s->addrlen),
*upload_data_size);
struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
if ((s->next_receive.abs_value <= now.abs_value))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: %X: PUT with %u bytes forwarded to MST\n", s,
*upload_data_size);
if (s->msg_tk == NULL)
{
s->msg_tk = GNUNET_SERVER_mst_create (&server_receive_mst_cb, s);
}
GNUNET_SERVER_mst_receive (s->msg_tk, s, upload_data,
*upload_data_size, GNUNET_NO, GNUNET_NO);
#if MHD_VERSION >= 0x00090E00
int to = (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value / 1000);
struct ServerConnection *t = NULL;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Received %u bytes\n", *upload_data_size);
/* Setting timeouts for other connections */
if (s->server_recv != NULL)
{
t = s->server_recv;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Setting timeout for %X to %u sec.\n", t,
to);
MHD_set_connection_option (t->mhd_conn, MHD_CONNECTION_OPTION_TIMEOUT,
to);
}
if (s->server_send != NULL)
{
t = s->server_send;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: Setting timeout for %X to %u sec.\n", t,
to);
MHD_set_connection_option (t->mhd_conn, MHD_CONNECTION_OPTION_TIMEOUT,
to);
}
struct MHD_Daemon *d = NULL;
if (s->addrlen == sizeof (struct IPv6HttpAddress))
d = plugin->server_v6;
if (s->addrlen == sizeof (struct IPv4HttpAddress))
d = plugin->server_v4;
server_reschedule (plugin, d, GNUNET_NO);
#endif
(*upload_data_size) = 0;
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Server: %X no inbound bandwidth available! Next read was delayed by %llu ms\n",
s, now.abs_value - s->next_receive.abs_value);
}
return MHD_YES;
}
else
return MHD_NO;
}
return res;
}
static void
server_disconnect_cb (void *cls, struct MHD_Connection *connection,
void **httpSessionCache)
{
struct ServerConnection *sc = *httpSessionCache;
struct ServerConnection *tc = NULL;
struct Session *s = NULL;
struct Session *t = NULL;
struct Plugin *plugin = NULL;
if (sc == NULL)
return;
s = sc->session;
plugin = s->plugin;
if (sc->direction == _SEND)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: %X peer `%s' GET on address `%s' disconnected\n",
s->server_send, GNUNET_i2s (&s->target),
http_plugin_address_to_string (NULL, s->addr, s->addrlen));
s->server_send = NULL;
if (s->server_recv != NULL)
{
tc = s->server_recv;
tc->disconnect = GNUNET_YES;
#if MHD_VERSION >= 0x00090E00
MHD_set_connection_option (sc->mhd_conn, MHD_CONNECTION_OPTION_TIMEOUT,
1);
#endif
}
}
if (sc->direction == _RECEIVE)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: %X peer `%s' PUT on address `%s' disconnected\n",
s->server_recv, GNUNET_i2s (&s->target),
http_plugin_address_to_string (NULL, s->addr, s->addrlen));
s->server_recv = NULL;
if (s->server_send != NULL)
{
tc = s->server_send;
tc->disconnect = GNUNET_YES;
#if MHD_VERSION >= 0x00090E00
MHD_set_connection_option (sc->mhd_conn, MHD_CONNECTION_OPTION_TIMEOUT,
1);
#endif
}
if (s->msg_tk != NULL)
{
GNUNET_SERVER_mst_destroy (s->msg_tk);
s->msg_tk = NULL;
}
}
GNUNET_free (sc);
t = plugin->server_semi_head;
while (t != NULL)
{
if (t == s)
{
GNUNET_CONTAINER_DLL_remove (plugin->server_semi_head,
plugin->server_semi_tail, s);
GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
break;
}
t = t->next;
}
plugin->cur_connections--;
struct MHD_Daemon *d = NULL;
if (s->addrlen == sizeof (struct IPv6HttpAddress))
d = plugin->server_v6;
if (s->addrlen == sizeof (struct IPv4HttpAddress))
d = plugin->server_v4;
server_reschedule (plugin, d, GNUNET_NO);
if ((s->server_send == NULL) && (s->server_recv == NULL))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Server: peer `%s' on address `%s' disconnected\n",
GNUNET_i2s (&s->target),
http_plugin_address_to_string (NULL, s->addr, s->addrlen));
if (s->msg_tk != NULL)
{
GNUNET_SERVER_mst_destroy (s->msg_tk);
s->msg_tk = NULL;
}
notify_session_end (s->plugin, &s->target, s);
}
}
int
server_disconnect (struct Session *s)
{
struct Plugin *plugin = s->plugin;
struct Session *t = plugin->head;
while (t != NULL)
{
if (t->inbound == GNUNET_YES)
{
if (t->server_send != NULL)
{
((struct ServerConnection *) t->server_send)->disconnect = GNUNET_YES;
}
if (t->server_send != NULL)
{
((struct ServerConnection *) t->server_send)->disconnect = GNUNET_YES;
}
}
t = t->next;
}
return GNUNET_OK;
}
int
server_send (struct Session *s, struct HTTP_Message *msg)
{
GNUNET_CONTAINER_DLL_insert (s->msg_head, s->msg_tail, msg);
if (s->addrlen == sizeof (struct IPv4HttpAddress))
{
server_reschedule (s->plugin, s->plugin->server_v4, GNUNET_YES);
}
else if (s->addrlen == sizeof (struct IPv6HttpAddress))
{
server_reschedule (s->plugin, s->plugin->server_v6, GNUNET_YES);
}
else
return GNUNET_SYSERR;
return GNUNET_OK;
}
/**
* Call MHD IPv4 to process pending requests and then go back
* and schedule the next run.
* @param cls plugin as closure
* @param tc task context
*/
static void
server_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct Plugin *plugin = cls;
GNUNET_assert (cls != NULL);
plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Running IPv4 server\n");
GNUNET_assert (MHD_YES == MHD_run (plugin->server_v4));
if (plugin->server_v4 != NULL)
plugin->server_v4_task =
server_schedule (plugin, plugin->server_v4, GNUNET_NO);
}
/**
* Call MHD IPv6 to process pending requests and then go back
* and schedule the next run.
* @param cls plugin as closure
* @param tc task context
*/
static void
server_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct Plugin *plugin = cls;
GNUNET_assert (cls != NULL);
plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Running IPv6 server\n");
GNUNET_assert (MHD_YES == MHD_run (plugin->server_v6));
if (plugin->server_v6 != NULL)
plugin->server_v6_task =
server_schedule (plugin, plugin->server_v6, GNUNET_NO);
}
/**
* Function that queries MHD's select sets and
* starts the task waiting for them.
* @param plugin plugin
* @param daemon_handle the MHD daemon handle
* @return gnunet task identifier
*/
static GNUNET_SCHEDULER_TaskIdentifier
server_schedule (struct Plugin *plugin, struct MHD_Daemon *daemon_handle,
int now)
{
GNUNET_SCHEDULER_TaskIdentifier ret;
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;
unsigned long long timeout;
static unsigned long long last_timeout = 0;
int haveto;
struct GNUNET_TIME_Relative tv;
ret = GNUNET_SCHEDULER_NO_TASK;
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 (daemon_handle, &rs, &ws, &es, &max));
haveto = MHD_get_timeout (daemon_handle, &timeout);
if (haveto == MHD_YES)
{
if (timeout != last_timeout)
{
#if VERBOSE_SERVER
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"SELECT Timeout changed from %llu to %llu\n",
last_timeout, timeout);
#endif
last_timeout = timeout;
}
tv.rel_value = (uint64_t) timeout;
}
else
tv = GNUNET_TIME_UNIT_SECONDS;
/* Force immediate run, since we have outbound data to send */
if (now == GNUNET_YES)
tv = GNUNET_TIME_UNIT_MILLISECONDS;
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);
if (daemon_handle == plugin->server_v4)
{
if (plugin->server_v4_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
}
#if VERBOSE_SERVER
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Scheduling IPv4 server task in %llu ms\n", tv);
#endif
ret =
GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
GNUNET_SCHEDULER_NO_TASK, tv, wrs, wws,
&server_v4_run, plugin);
}
if (daemon_handle == plugin->server_v6)
{
if (plugin->server_v6_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
}
#if VERBOSE_SERVER
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Scheduling IPv6 server task in %llu ms\n", tv);
#endif
ret =
GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
GNUNET_SCHEDULER_NO_TASK, tv, wrs, wws,
&server_v6_run, plugin);
}
GNUNET_NETWORK_fdset_destroy (wrs);
GNUNET_NETWORK_fdset_destroy (wws);
GNUNET_NETWORK_fdset_destroy (wes);
return ret;
}
int
server_start (struct Plugin *plugin)
{
int res = GNUNET_OK;
unsigned int timeout;
#if BUILD_HTTPS
res = server_load_certificate (plugin);
if (res == GNUNET_SYSERR)
{
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
"Could not load or create server certificate! Loading plugin failed!\n");
return res;
}
#endif
#if MHD_VERSION >= 0x00090E00
timeout = HTTP_NOT_VALIDATED_TIMEOUT.rel_value / 1000;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"MHD can set timeout per connection! Default time out %u sec.\n",
timeout);
#else
timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value / 1000;
GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
"MHD cannot set timeout per connection! Default time out %u sec.\n",
timeout);
#endif
plugin->server_v4 = NULL;
if (plugin->ipv4 == GNUNET_YES)
{
plugin->server_v4 = MHD_start_daemon (
#if VERBOSE_SERVER
MHD_USE_DEBUG |
#endif
#if BUILD_HTTPS
MHD_USE_SSL |
#endif
MHD_NO_FLAG, plugin->port,
&server_accept_cb, plugin,
&server_access_cb, plugin,
MHD_OPTION_SOCK_ADDR,
(struct sockaddr_in *)
plugin->server_addr_v4,
MHD_OPTION_CONNECTION_LIMIT,
(unsigned int)
plugin->max_connections,
#if BUILD_HTTPS
MHD_OPTION_HTTPS_PRIORITIES,
plugin->crypto_init,
MHD_OPTION_HTTPS_MEM_KEY,
plugin->key,
MHD_OPTION_HTTPS_MEM_CERT,
plugin->cert,
#endif
MHD_OPTION_CONNECTION_TIMEOUT,
timeout,
MHD_OPTION_CONNECTION_MEMORY_LIMIT,
(size_t) (2 *
GNUNET_SERVER_MAX_MESSAGE_SIZE),
MHD_OPTION_NOTIFY_COMPLETED,
&server_disconnect_cb, plugin,
MHD_OPTION_EXTERNAL_LOGGER,
server_log, NULL, MHD_OPTION_END);
}
plugin->server_v6 = NULL;
if (plugin->ipv6 == GNUNET_YES)
{
plugin->server_v6 = MHD_start_daemon (
#if VERBOSE_SERVER
MHD_USE_DEBUG |
#endif
#if BUILD_HTTPS
MHD_USE_SSL |
#endif
MHD_USE_IPv6, plugin->port,
&server_accept_cb, plugin,
&server_access_cb, plugin,
MHD_OPTION_SOCK_ADDR,
(struct sockaddr_in6 *)
plugin->server_addr_v6,
MHD_OPTION_CONNECTION_LIMIT,
(unsigned int)
plugin->max_connections,
#if BUILD_HTTPS
MHD_OPTION_HTTPS_PRIORITIES,
plugin->crypto_init,
MHD_OPTION_HTTPS_MEM_KEY,
plugin->key,
MHD_OPTION_HTTPS_MEM_CERT,
plugin->cert,
#endif
MHD_OPTION_CONNECTION_TIMEOUT,
timeout,
MHD_OPTION_CONNECTION_MEMORY_LIMIT,
(size_t) (2 *
GNUNET_SERVER_MAX_MESSAGE_SIZE),
MHD_OPTION_NOTIFY_COMPLETED,
&server_disconnect_cb, plugin,
MHD_OPTION_EXTERNAL_LOGGER,
server_log, NULL, MHD_OPTION_END);
}
if ((plugin->ipv4 == GNUNET_YES) && (plugin->server_v4 == NULL))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
"Failed to start %s IPv4 server component on port %u\n",
plugin->name, plugin->port);
return GNUNET_SYSERR;
}
server_reschedule (plugin, plugin->server_v4, GNUNET_NO);
if ((plugin->ipv6 == GNUNET_YES) && (plugin->server_v6 == NULL))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
"Failed to start %s IPv6 server component on port %u\n",
plugin->name, plugin->port);
return GNUNET_SYSERR;
}
server_reschedule (plugin, plugin->server_v6, GNUNET_NO);
#if DEBUG_HTTP
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"%s server component started on port %u\n", plugin->name,
plugin->port);
#endif
return res;
}
void
server_stop (struct Plugin *plugin)
{
struct Session *s = NULL;
struct Session *t = NULL;
struct MHD_Daemon *server_v4_tmp = plugin->server_v4;
plugin->server_v4 = NULL;
struct MHD_Daemon *server_v6_tmp = plugin->server_v6;
plugin->server_v6 = NULL;
if (plugin->server_v4_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
}
if (plugin->server_v6_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
}
if (server_v6_tmp != NULL)
{
MHD_stop_daemon (server_v4_tmp);
}
if (server_v6_tmp != NULL)
{
MHD_stop_daemon (server_v6_tmp);
}
/* cleaning up semi-sessions never propagated */
s = plugin->server_semi_head;
while (s != NULL)
{
#if VERBOSE_SERVER
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"Deleting semi-sessions %p\n", s);
#endif
t = s->next;
struct HTTP_Message *msg = s->msg_head;
struct HTTP_Message *tmp = NULL;
while (msg != NULL)
{
tmp = msg->next;
GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
if (msg->transmit_cont != NULL)
{
msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
}
GNUNET_free (msg);
msg = tmp;
}
delete_session (s);
s = t;
}
#if BUILD_HTTPS
GNUNET_free_non_null (plugin->crypto_init);
GNUNET_free_non_null (plugin->cert);
GNUNET_free_non_null (plugin->key);
#endif
#if DEBUG_HTTP
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
"%s server component stopped\n", plugin->name);
#endif
}
/* end of plugin_transport_http.c */
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