From: Christian Grothoff Date: Wed, 13 Jul 2011 11:07:38 +0000 (+0000) Subject: dce X-Git-Tag: initial-import-from-subversion-38251~17893 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=1ad6c770476ec896d2a5c9f8e26237de36eb05e0;p=oweals%2Fgnunet.git dce --- diff --git a/src/fragmentation/fragmentation.c b/src/fragmentation/fragmentation.c deleted file mode 100644 index 3ff737ccf..000000000 --- a/src/fragmentation/fragmentation.c +++ /dev/null @@ -1,858 +0,0 @@ -/* - This file is part of GNUnet - (C) 2004, 2006, 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 fragmentation/fragmentation.c - * @brief fragmentation and defragmentation, this code allows - * sending and receiving messages that are larger than - * the MTU of the transport. Messages are still limited - * to a maximum size of 65535 bytes, which is a good - * idea because otherwise we may need ungainly fragmentation - * buffers. Each connected peer can have at most one - * fragmented packet at any given point in time (prevents - * DoS attacks). Fragmented messages that have not been - * completed after a certain amount of time are discarded. - * @author Ji Lu - */ - -#include "platform.h" -#include "gnunet_fragmentation_lib.h" -#include "gnunet_protocols.h" -#include "gnunet_util_lib.h" - -/** - * Message fragment. This header is followed - * by the actual data of the fragment. - */ - -struct Fragment -{ - - struct GNUNET_MessageHeader header; - - /** - * Fragment offset. - */ - uint16_t off GNUNET_PACKED; - - /** - * "unique" id for the fragment - */ - uint32_t id GNUNET_PACKED; - uint16_t mtu; - uint16_t totalNum; - uint16_t totalSize; - -}; - -struct GNUNET_FRAGEMENT_Ctxbuffer{ - struct GNUNET_FRAGEMENT_Ctxbuffer *next; - uint32_t id; - uint16_t size; - char * buff; - int counter; - struct GNUNET_TIME_Absolute receivedTime; - struct GNUNET_PeerIdentity peerID; - int * num; -}; - - -/** - * Defragmentation context. - */ -struct GNUNET_FRAGMENT_Context -{ - uint32_t maxNum; - struct GNUNET_FRAGEMENT_Ctxbuffer *buffer; - GNUNET_FRAGMENT_MessageProcessor proc; - void *proc_cls; -}; - - -/** - * Fragment an over-sized message. - * - * @param msg the message to fragment - * @param mtu the maximum message size - * @param proc function to call for each fragment - * @param proc_cls closure for proc - */ -void -GNUNET_FRAGMENT_fragment (const struct GNUNET_MessageHeader *msg, - uint16_t mtu, - GNUNET_FRAGMENT_MessageProcessor proc, - void *proc_cls) -{ - uint32_t id = GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 256); - size_t size = sizeof(struct Fragment); - - if(ntohs(msg->size) > mtu-size){ - uint16_t lastSize; - uint16_t num; - uint16_t i; - uint16_t actualNum; - lastSize = ntohs(msg->size) % (mtu-size); - num = ntohs(msg->size) / (mtu - size); - actualNum = num; - if(lastSize!=0){ - actualNum = num+1; - } - for(i = 0; iheader.type = htons(GNUNET_MESSAGE_TYPE_FRAGMENT); - frag->id = htonl(id); - frag->off = htons((mtu-size)*i); - frag->mtu = htons(mtu); - frag->totalNum = htons(actualNum); - frag->totalSize = msg->size; - char *tmpMsg = (char *)msg; - if(actualNum != num){ - if(i!=actualNum-1){ - frag->header.size = htons(mtu); - memcpy(&frag[1], tmpMsg + (mtu-size)*i, mtu - size); - } - else{ - frag->header.size = htons(lastSize+size); - memcpy(&frag[1], tmpMsg + (mtu-size)*i, lastSize); - } - } - else{ - frag->header.size = htons(mtu); - memcpy(&frag[1], tmpMsg + (mtu-size)*i, mtu - size); - } - proc(proc_cls, &frag->header); - GNUNET_free(frag); - } - } -} - -/** - * Create a defragmentation context. - * - * @param stats statistics context - * @param proc function to call with defragmented messages - * @param proc_cls closure for proc - * @return the defragmentation context - */ -struct GNUNET_FRAGMENT_Context * -GNUNET_FRAGMENT_context_create (struct GNUNET_STATISTICS_Handle *stats, - GNUNET_FRAGMENT_MessageProcessor proc, - void *proc_cls) - { - struct GNUNET_FRAGMENT_Context *ctx = (struct GNUNET_FRAGMENT_Context*)GNUNET_malloc(sizeof(struct GNUNET_FRAGMENT_Context)); - ctx->maxNum = 100; - ctx->proc = proc; - ctx->proc_cls = proc_cls; - ctx->buffer = NULL; - return ctx; - } - - -/** - * Destroy the given defragmentation context. - */ -void -GNUNET_FRAGMENT_context_destroy (struct GNUNET_FRAGMENT_Context *ctx) -{ - struct GNUNET_FRAGEMENT_Ctxbuffer *buffer; - struct GNUNET_FRAGEMENT_Ctxbuffer *temp; - buffer = ctx->buffer; - - while (buffer != NULL) - { - temp = buffer->next; - GNUNET_free(buffer->num); - GNUNET_free(buffer); - buffer = temp; - } - GNUNET_free(ctx); - GNUNET_assert (0); -} - - -/** - * We have received a fragment. Process it. - * - * @param ctx the context - * @param sender who transmitted the fragment - * @param msg the message that was received - */ -void -GNUNET_FRAGMENT_process (struct GNUNET_FRAGMENT_Context *ctx, - const struct GNUNET_PeerIdentity *sender, - const struct GNUNET_MessageHeader *msg) -{ - uint16_t type = ntohs(msg->type); - int exist = 0, received = 0; - if(type!=GNUNET_MESSAGE_TYPE_FRAGMENT){ - return; - } - struct Fragment *frag = (struct Fragment *)msg; - struct GNUNET_FRAGEMENT_Ctxbuffer* buffer; - struct GNUNET_FRAGEMENT_Ctxbuffer* prev; - prev = NULL; - buffer = ctx->buffer; - while (buffer != NULL) - { - if ((buffer->id == ntohl(frag->id))&&(0 == memcmp (&buffer->peerID, - sender, sizeof (struct GNUNET_PeerIdentity)))){ - exist = 1; - break; - } - prev = buffer; - buffer = buffer->next; - } - - if (exist) - { - int i; - for(i = 0; itotalNum); i++){ - if(buffer->num[i]==ntohs(frag->off)/(ntohs(frag->mtu)-sizeof(struct Fragment))){ - received = 1; - break; - } - } - } - - if(!exist){ - buffer = GNUNET_malloc(sizeof(struct GNUNET_FRAGEMENT_Ctxbuffer)); - buffer->num = GNUNET_malloc(ntohs(frag->totalNum)*sizeof(int)); - int j; - for(j = 0; jtotalNum); j++){ - buffer->num[j] = -10; - } - buffer->peerID = *sender; - buffer->id = ntohl(frag->id); - buffer->receivedTime = GNUNET_TIME_absolute_get (); - uint16_t si = ntohs(frag->totalSize); - buffer->size = si; - buffer->buff = GNUNET_malloc(si); - buffer->next = ctx->buffer; - ctx->buffer = buffer; - } - - if(!received){ - buffer->num[buffer->counter++]=ntohs(frag->off)/(ntohs(frag->mtu)-sizeof(struct Fragment)); - uint16_t sizeoffrag = ntohs(frag->header.size) - sizeof(struct Fragment); - memcpy(&buffer->buff[ntohs(frag->off)], &frag[1], sizeoffrag); - buffer->receivedTime = GNUNET_TIME_absolute_get (); - } - - if(buffer->counter == ntohs(frag->totalNum)) - { - ctx->proc(ctx->proc_cls, (struct GNUNET_MessageHeader *)buffer->buff); - if(prev==NULL){ - ctx->buffer = buffer->next; - } - else{ - prev->next = buffer->next; - } - GNUNET_free(buffer); - return; - } -} - - - -#if 0 - -/** - * How many buckets does the fragment hash table - * have? - */ -#define DEFRAG_BUCKET_COUNT 16 - -/** - * After how long do fragments time out? - */ -#ifndef DEFRAGMENTATION_TIMEOUT -#define DEFRAGMENTATION_TIMEOUT (3 * GNUNET_CRON_MINUTES) -#endif - -/** - * Entry in the linked list of fragments. - */ -typedef struct FL -{ - struct FL *link; - P2P_fragmentation_MESSAGE *frag; -} FL; - -/** - * Entry in the GNUNET_hash table of fragments. - */ -typedef struct FC -{ - struct FC *next; - FL *head; - GNUNET_PeerIdentity sender; - int id; - GNUNET_CronTime ttl; -} FC; - -#define FRAGSIZE(fl) ((ntohs(fl->frag->header.size)-sizeof(P2P_fragmentation_MESSAGE))) - -static GNUNET_CoreAPIForPlugins *coreAPI; - -static GNUNET_Stats_ServiceAPI *stats; - -static int stat_defragmented; - -static int stat_fragmented; - -static int stat_discarded; - -/** - * Hashtable *with* collision management! - */ -static struct FC *defragmentationCache[DEFRAG_BUCKET_COUNT]; - -/** - * Lock for the defragmentation cache. - */ -static struct GNUNET_Mutex *defragCacheLock; - -static void -freeFL (FL * fl, int c) -{ - while (fl != NULL) - { - FL *link = fl->link; - if (stats != NULL) - stats->change (stat_discarded, c); - GNUNET_free (fl->frag); - GNUNET_free (fl); - fl = link; - } -} - -/** - * This cron job ensures that we purge buffers of fragments - * that have timed out. It can run in much longer intervals - * than the defragmentationCron, e.g. every 60s. - *

- * This method goes through the hashtable, finds entries that - * have timed out and removes them (and all the fragments that - * belong to the entry). It's a bit more complicated as the - * collision list is also collapsed. - */ -static void -defragmentationPurgeCron (void *unused) -{ - int i; - FC *smf; - FC *next; - FC *last; - - GNUNET_mutex_lock (defragCacheLock); - for (i = 0; i < DEFRAG_BUCKET_COUNT; i++) - { - last = NULL; - smf = defragmentationCache[i]; - while (smf != NULL) - { - if (smf->ttl < GNUNET_get_time ()) - { - /* free linked list of fragments */ - freeFL (smf->head, 1); - next = smf->next; - GNUNET_free (smf); - if (last == NULL) - defragmentationCache[i] = next; - else - last->next = next; - smf = next; - } - else - { - last = smf; - smf = smf->next; - } - } /* while smf != NULL */ - } /* for all buckets */ - GNUNET_mutex_unlock (defragCacheLock); -} - -/** - * Check if this fragment-list is complete. If yes, put it together, - * process and free all buffers. Does not free the pep - * itself (but sets the TTL to 0 to have the cron free it - * in the next iteration). - * - * @param pep the entry in the GNUNET_hash table - */ -static void -checkComplete (FC * pep) -{ - FL *pos; - unsigned short off; - unsigned short len; - char *msg; - - GNUNET_GE_ASSERT (NULL, pep != NULL); - pos = pep->head; - if (pos == NULL) - return; - len = ntohs (pos->frag->len); - if (len == 0) - goto CLEANUP; /* really bad error! */ - off = 0; - while ((pos != NULL) && (ntohs (pos->frag->off) <= off)) - { - if (off >= off + FRAGSIZE (pos)) - goto CLEANUP; /* error! */ - if (ntohs (pos->frag->off) + FRAGSIZE (pos) > off) - off = ntohs (pos->frag->off) + FRAGSIZE (pos); - else - goto CLEANUP; /* error! */ - pos = pos->link; - } - if (off < len) - return; /* some fragment is still missing */ - - msg = GNUNET_malloc (len); - pos = pep->head; - while (pos != NULL) - { - memcpy (&msg[ntohs (pos->frag->off)], &pos->frag[1], FRAGSIZE (pos)); - pos = pos->link; - } - if (stats != NULL) - stats->change (stat_defragmented, 1); -#if 0 - printf ("Finished defragmentation!\n"); -#endif - /* handle message! */ - coreAPI->loopback_send (&pep->sender, msg, len, GNUNET_YES, NULL); - GNUNET_free (msg); - CLEANUP: - /* free fragment buffers */ - freeFL (pep->head, 0); - pep->head = NULL; - pep->ttl = 0; -} - -/** - * See if the new fragment is a part of this entry and join them if - * yes. Return GNUNET_SYSERR if the fragments do not match. Return GNUNET_OK if - * the fragments do match and the fragment has been processed. The - * defragCacheLock is already acquired by the caller whenever this - * method is called.

- * - * @param entry the entry in the cache - * @param pep the new entry - * @param packet the ip part in the new entry - */ -static int -tryJoin (FC * entry, - const GNUNET_PeerIdentity * sender, - const P2P_fragmentation_MESSAGE * packet) -{ - /* frame before ours; may end in the middle of - our frame or before it starts; NULL if we are - the earliest position we have received so far */ - FL *before; - /* frame after ours; may start in the middle of - our frame or after it; NULL if we are the last - fragment we have received so far */ - FL *after; - /* current position in the frame-list */ - FL *pos; - /* the new entry that we're inserting */ - FL *pep; - FL *tmp; - unsigned short end; - - GNUNET_GE_ASSERT (NULL, entry != NULL); - if (0 != memcmp (sender, &entry->sender, sizeof (GNUNET_PeerIdentity))) - return GNUNET_SYSERR; /* wrong fragment list, try another! */ - if (ntohl (packet->id) != entry->id) - return GNUNET_SYSERR; /* wrong fragment list, try another! */ -#if 0 - printf ("Received fragment %u from %u to %u\n", - ntohl (packet->id), - ntohs (packet->off), - ntohs (packet->off) + ntohs (packet->header.size) - - sizeof (P2P_fragmentation_MESSAGE)); -#endif - pos = entry->head; - if ((pos != NULL) && (packet->len != pos->frag->len)) - return GNUNET_SYSERR; /* wrong fragment size */ - - before = NULL; - /* find the before-frame */ - while ((pos != NULL) && (ntohs (pos->frag->off) < ntohs (packet->off))) - { - before = pos; - pos = pos->link; - } - - /* find the after-frame */ - end = - ntohs (packet->off) + ntohs (packet->header.size) - - sizeof (P2P_fragmentation_MESSAGE); - if (end <= ntohs (packet->off)) - { - GNUNET_GE_LOG (NULL, - GNUNET_GE_DEVELOPER | GNUNET_GE_DEBUG | GNUNET_GE_BULK, - "Received invalid fragment at %s:%d\n", __FILE__, - __LINE__); - return GNUNET_SYSERR; /* yuck! integer overflow! */ - } - - if (before != NULL) - after = before; - else - after = entry->head; - while ((after != NULL) && (ntohs (after->frag->off) < end)) - after = after->link; - - if ((before != NULL) && (before == after)) - { - /* this implies after or before != NULL and thereby the new - fragment is redundant as it is fully enclosed in an earlier - fragment */ - if (stats != NULL) - stats->change (stat_defragmented, 1); - return GNUNET_OK; /* drop, there is a packet that spans our range! */ - } - - if ((before != NULL) && - (after != NULL) && - ((htons (before->frag->off) + - FRAGSIZE (before)) >= htons (after->frag->off))) - { - /* this implies that the fragment that starts before us and the - fragment that comes after this one leave no space in the middle - or even overlap; thus we can drop this redundant piece */ - if (stats != NULL) - stats->change (stat_defragmented, 1); - return GNUNET_OK; - } - - /* allocate pep */ - pep = GNUNET_malloc (sizeof (FC)); - pep->frag = GNUNET_malloc (ntohs (packet->header.size)); - memcpy (pep->frag, packet, ntohs (packet->header.size)); - pep->link = NULL; - - if (before == NULL) - { - pep->link = after; - pos = entry->head; - while (pos != after) - { - tmp = pos->link; - GNUNET_free (pos->frag); - GNUNET_free (pos); - pos = tmp; - } - entry->head = pep; - goto FINISH; - /* end of insert first */ - } - - if (after == NULL) - { - /* insert last: find the end, free everything after it */ - freeFL (before->link, 1); - before->link = pep; - goto FINISH; - } - - /* ok, we are filling the middle between two fragments; insert. If - there is anything else in the middle, it can be dropped as we're - bigger & cover that area as well */ - /* free everything between before and after */ - pos = before->link; - while (pos != after) - { - tmp = pos->link; - GNUNET_free (pos->frag); - GNUNET_free (pos); - pos = tmp; - } - before->link = pep; - pep->link = after; - - FINISH: - entry->ttl = GNUNET_get_time () + DEFRAGMENTATION_TIMEOUT; - checkComplete (entry); - return GNUNET_OK; -} - -/** - * Defragment the given fragment and pass to handler once - * defragmentation is complete. - * - * @param frag the packet to defragment - * @return GNUNET_SYSERR if the fragment is invalid - */ -static int -processFragment (const GNUNET_PeerIdentity * sender, - const GNUNET_MessageHeader * frag) -{ - unsigned int hash; - FC *smf; - - if (ntohs (frag->size) < sizeof (P2P_fragmentation_MESSAGE)) - return GNUNET_SYSERR; - - GNUNET_mutex_lock (defragCacheLock); - hash = sender->hashPubKey.bits[0] % DEFRAG_BUCKET_COUNT; - smf = defragmentationCache[hash]; - while (smf != NULL) - { - if (GNUNET_OK == - tryJoin (smf, sender, (P2P_fragmentation_MESSAGE *) frag)) - { - GNUNET_mutex_unlock (defragCacheLock); - return GNUNET_OK; - } - if (0 == memcmp (sender, &smf->sender, sizeof (GNUNET_PeerIdentity))) - { - freeFL (smf->head, 1); - break; - } - smf = smf->next; - } - if (smf == NULL) - { - smf = GNUNET_malloc (sizeof (FC)); - smf->next = defragmentationCache[hash]; - defragmentationCache[hash] = smf; - smf->ttl = GNUNET_get_time () + DEFRAGMENTATION_TIMEOUT; - smf->sender = *sender; - } - smf->id = ntohl (((P2P_fragmentation_MESSAGE *) frag)->id); - smf->head = GNUNET_malloc (sizeof (FL)); - smf->head->link = NULL; - smf->head->frag = GNUNET_malloc (ntohs (frag->size)); - memcpy (smf->head->frag, frag, ntohs (frag->size)); - - GNUNET_mutex_unlock (defragCacheLock); - return GNUNET_OK; -} - -typedef struct -{ - GNUNET_PeerIdentity sender; - /* maximums size of each fragment */ - unsigned short mtu; - /** how long is this message part expected to be? */ - unsigned short len; - /** when did we intend to transmit? */ - GNUNET_CronTime transmissionTime; -} FragmentBMC; - -/** - * Send a message that had to be fragmented (right now!). First grabs - * the first part of the message (obtained from ctx->se) and stores - * that in a P2P_fragmentation_MESSAGE envelope. The remaining fragments are - * added to the send queue with GNUNET_EXTREME_PRIORITY (to ensure that they - * will be transmitted next). The logic here is that if the priority - * for the first fragment was sufficiently high, the priority should - * also have been sufficiently high for all of the other fragments (at - * this time) since they have the same priority. And we want to make - * sure that we send all of them since just sending the first fragment - * and then going to other messages of equal priority would not be - * such a great idea (i.e. would just waste bandwidth). - */ -static int -fragmentBMC (void *buf, void *cls, unsigned short len) -{ - FragmentBMC *ctx = cls; - static int idGen = 0; - P2P_fragmentation_MESSAGE *frag; - unsigned int pos; - int id; - unsigned short mlen; - - if ((len < ctx->mtu) || (buf == NULL)) - { - GNUNET_free (ctx); - return GNUNET_SYSERR; - } - if (stats != NULL) - stats->change (stat_fragmented, 1); - id = (idGen++) + GNUNET_random_u32 (GNUNET_RANDOM_QUALITY_WEAK, 512); - /* write first fragment to buf */ - frag = (P2P_fragmentation_MESSAGE *) buf; - frag->header.size = htons (len); - frag->header.type = htons (GNUNET_P2P_PROTO_MESSAGE_FRAGMENT); - frag->id = id; - frag->off = htons (0); - frag->len = htons (ctx->len); - memcpy (&frag[1], &ctx[1], len - sizeof (P2P_fragmentation_MESSAGE)); - - /* create remaining fragments, add to queue! */ - pos = len - sizeof (P2P_fragmentation_MESSAGE); - frag = GNUNET_malloc (ctx->mtu); - while (pos < ctx->len) - { - mlen = sizeof (P2P_fragmentation_MESSAGE) + ctx->len - pos; - if (mlen > ctx->mtu) - mlen = ctx->mtu; - GNUNET_GE_ASSERT (NULL, mlen > sizeof (P2P_fragmentation_MESSAGE)); - frag->header.size = htons (mlen); - frag->header.type = htons (GNUNET_P2P_PROTO_MESSAGE_FRAGMENT); - frag->id = id; - frag->off = htons (pos); - frag->len = htons (ctx->len); - memcpy (&frag[1], - &((char *) (&ctx[1]))[pos], - mlen - sizeof (P2P_fragmentation_MESSAGE)); - coreAPI->ciphertext_send (&ctx->sender, - &frag->header, - GNUNET_EXTREME_PRIORITY, - ctx->transmissionTime - GNUNET_get_time ()); - pos += mlen - sizeof (P2P_fragmentation_MESSAGE); - } - GNUNET_GE_ASSERT (NULL, pos == ctx->len); - GNUNET_free (frag); - GNUNET_free (ctx); - return GNUNET_OK; -} - -/** - * The given message must be fragmented. Produce a placeholder that - * corresponds to the first fragment. Once that fragment is scheduled - * for transmission, the placeholder should automatically add all of - * the other fragments (with very high priority). - */ -void -fragment (const GNUNET_PeerIdentity * peer, - unsigned int mtu, - unsigned int prio, - unsigned int targetTime, - unsigned int len, GNUNET_BuildMessageCallback bmc, void *bmcClosure) -{ - FragmentBMC *fbmc; - int xlen; - - GNUNET_GE_ASSERT (NULL, len > mtu); - GNUNET_GE_ASSERT (NULL, mtu > sizeof (P2P_fragmentation_MESSAGE)); - fbmc = GNUNET_malloc (sizeof (FragmentBMC) + len); - fbmc->mtu = mtu; - fbmc->sender = *peer; - fbmc->transmissionTime = targetTime; - fbmc->len = len; - if (bmc == NULL) - { - memcpy (&fbmc[1], bmcClosure, len); - GNUNET_free (bmcClosure); - } - else - { - if (GNUNET_SYSERR == bmc (&fbmc[1], bmcClosure, len)) - { - GNUNET_free (fbmc); - return; - } - } - xlen = mtu - sizeof (P2P_fragmentation_MESSAGE); - coreAPI->ciphertext_send_with_callback (peer, &fragmentBMC, fbmc, mtu, prio * xlen / len, /* compute new priority */ - targetTime); -} - -/** - * Initialize Fragmentation module. - */ -GNUNET_Fragmentation_ServiceAPI * -provide_module_fragmentation (GNUNET_CoreAPIForPlugins * capi) -{ - static GNUNET_Fragmentation_ServiceAPI ret; - int i; - - coreAPI = capi; - stats = coreAPI->service_request ("stats"); - if (stats != NULL) - { - stat_defragmented = - stats->create (gettext_noop ("# messages defragmented")); - stat_fragmented = - stats->create (gettext_noop ("# messages fragmented")); - stat_discarded = stats->create (gettext_noop ("# fragments discarded")); - } - for (i = 0; i < DEFRAG_BUCKET_COUNT; i++) - defragmentationCache[i] = NULL; - defragCacheLock = GNUNET_mutex_create (GNUNET_NO); - GNUNET_cron_add_job (coreAPI->cron, - &defragmentationPurgeCron, - 60 * GNUNET_CRON_SECONDS, 60 * GNUNET_CRON_SECONDS, - NULL); - GNUNET_GE_LOG (capi->ectx, - GNUNET_GE_INFO | GNUNET_GE_USER | GNUNET_GE_REQUEST, - _("`%s' registering handler %d\n"), "fragmentation", - GNUNET_P2P_PROTO_MESSAGE_FRAGMENT); - capi->p2p_ciphertext_handler_register (GNUNET_P2P_PROTO_MESSAGE_FRAGMENT, - &processFragment); - - ret.fragment = &fragment; - return &ret; -} - -/** - * Shutdown fragmentation. - */ -void -release_module_fragmentation () -{ - int i; - - coreAPI->p2p_ciphertext_handler_unregister - (GNUNET_P2P_PROTO_MESSAGE_FRAGMENT, &processFragment); - GNUNET_cron_del_job (coreAPI->cron, &defragmentationPurgeCron, - 60 * GNUNET_CRON_SECONDS, NULL); - for (i = 0; i < DEFRAG_BUCKET_COUNT; i++) - { - FC *pos = defragmentationCache[i]; - while (pos != NULL) - { - FC *next = pos->next; - freeFL (pos->head, 1); - GNUNET_free (pos); - pos = next; - } - } - if (stats != NULL) - { - coreAPI->service_release (stats); - stats = NULL; - } - GNUNET_mutex_destroy (defragCacheLock); - defragCacheLock = NULL; - coreAPI = NULL; -} - -#endif - -/* end of fragmentation.c */