C++ ccn_charbuf_destroy函数代码示例

extern int
SyncCacheEntryFetch(struct SyncHashCacheEntry *ce) {
    // causes the cache entry to fetched from the repo
    char *here = "Sync.SyncCacheEntryFetch";
    int res = 0;
    if (ce == NULL) {
        // not an entry
        res = -1;
    } else if (ce->ncL != NULL) {
        // it's already here
        res = 0;
    } else if ((ce->state & SyncHashState_stored) == 0) {
        // it's never been stored, fail quietly
        res = -1;
    } else {
        // at this point we try to fetch it from the local repo
        // a failure should complain
        struct SyncRootStruct *root = ce->head->root;
        struct SyncBaseStruct *base = root->base;
        struct ccn_charbuf *name = SyncNameForLocalNode(root, ce->hash);
        struct ccn_charbuf *content = ccn_charbuf_create();
        char *why = "no fetch";
        struct ccn_parsed_ContentObject pcos;
        
        res = SyncLocalRepoFetch(base, name, content, &pcos);
        if (res >= 0) {
            // parse the object
            const unsigned char *xp = NULL;
            size_t xs = 0;
            // get the encoded node
            res = ccn_content_get_value(content->buf, content->length,
                                        &pcos, &xp, &xs);
            if (res < 0)
                why = "ccn_content_get_value failed";
            else {
                struct ccn_buf_decoder ds;
                struct ccn_buf_decoder *d = ccn_buf_decoder_start(&ds, xp, xs);
                struct SyncNodeComposite *nc = SyncAllocComposite(root->base);
                res |= SyncParseComposite(nc, d);
                if (res < 0) {
                    // failed, so back out of the allocations
                    why = "bad parse";
                    SyncFreeComposite(nc);
                    nc = NULL;
                } else {
                    res = 1;
                    SyncNodeIncRC(nc);
                    ce->ncL = nc;
                    ce->state |= SyncHashState_stored;
                }
            }
        }
        if (res < 0)
            if (root->base->debug >= CCNL_ERROR)
                SyncNoteUri(root, here, why, name);
        ccn_charbuf_destroy(&name);
        ccn_charbuf_destroy(&content);
    }
    return res;
}

/**
 * Write a file named index/stable that contains the size of
 * repoFile1 when the repository is shut down.
 */
static int
r_store_write_stable_point(struct ccnr_handle *h)
{
    struct ccn_charbuf *path = NULL;
    struct ccn_charbuf *cb = NULL;
    int fd;
    
    path = ccn_charbuf_create();
    cb = ccn_charbuf_create();
    ccn_charbuf_putf(path, "%s/index/stable", h->directory);
    unlink(ccn_charbuf_as_string(path)); /* Should not exist, but just in case. */
    fd = open(ccn_charbuf_as_string(path),
              O_CREAT | O_EXCL | O_WRONLY | O_TRUNC, 0666);
    if (fd == -1) {
        ccnr_msg(h, "cannot write stable mark %s: %s",
                 ccn_charbuf_as_string(path), strerror(errno));
        unlink(ccn_charbuf_as_string(path));
    }
    else {
        ccn_charbuf_putf(cb, "%ju", (uintmax_t)(h->stable));
        write(fd, cb->buf, cb->length);
        close(fd);
        if (CCNSHOULDLOG(h, dfsdf, CCNL_INFO))
            ccnr_msg(h, "Index marked stable - %s", ccn_charbuf_as_string(cb));
    }
    ccn_charbuf_destroy(&path);
    ccn_charbuf_destroy(&cb);
    return(0);
}

/**
* Ends the download stream
*/
void CCNGet::endStream()
{
	stream = ccn_fetch_close(stream);
	ccn_destroy(&ccn);
	ccn_charbuf_destroy(&templ);
	ccn_charbuf_destroy(&name);
}

char * 
get_orig_router_from_info_content_name(struct ccn_charbuf * content_name)
{
	int start,end;

	start=0;

	struct ccn_indexbuf *comps=ccn_indexbuf_create();
	ccn_name_split (content_name, comps);

	end=check_for_name_component_in_name(content_name,comps,"nlsr");


	struct ccn_charbuf *temp=ccn_charbuf_create();
	ccn_name_init(temp);	
	ccn_name_append_components( temp,	content_name->buf,
								comps->buf[start], 
								comps->buf[end]);

	struct ccn_charbuf *temp1=ccn_charbuf_create();
	ccn_uri_append(temp1, temp->buf, temp->length, 0);

	char *orig_router=(char *)calloc(strlen(ccn_charbuf_as_string(temp1))+1,
																sizeof(char));
	memcpy(orig_router,ccn_charbuf_as_string(temp1),
										strlen(ccn_charbuf_as_string(temp1)));
	orig_router[strlen(orig_router)]='\0';
	
	ccn_charbuf_destroy(&temp);
	ccn_charbuf_destroy(&temp1);
	ccn_indexbuf_destroy(&comps);
	return orig_router;
	

}

int
ccns_slice_name(struct ccn_charbuf *nm, struct ccns_slice *s)
{
    struct ccn_charbuf *c;
    struct ccn_digest *digest = NULL;
    struct ccn_charbuf *hash = NULL;
    int res = 0;

    c = ccn_charbuf_create();
    if (c == NULL)
        return (-1);
    res = append_slice(c, s);
    if (res < 0)
        goto Cleanup;

    digest = ccn_digest_create(CCN_DIGEST_SHA256);
    hash = ccn_charbuf_create_n(ccn_digest_size(digest));
    if (hash == NULL)
        goto Cleanup;
    ccn_digest_init(digest);
    res |= ccn_digest_update(digest, c->buf, c->length);
    res |= ccn_digest_final(digest, hash->buf, hash->limit);
    if (res < 0)
        goto Cleanup;
    hash->length = hash->limit;
    if (ccn_name_from_uri(nm, "ccnx:/%C1.M.S.localhost/%C1.S.cs") < 0)
        res = -1;
    res |= ccn_name_append(nm, hash->buf, hash->length);

Cleanup:
    ccn_charbuf_destroy(&c);
    ccn_digest_destroy(&digest);
    ccn_charbuf_destroy(&hash);
    return (res);
}

static enum ccn_upcall_res
seqw_incoming_interest(
                       struct ccn_closure *selfp,
                       enum ccn_upcall_kind kind,
                       struct ccn_upcall_info *info)
{
    int res;
    struct ccn_charbuf *cob = NULL;
    struct ccn_seqwriter *w = selfp->data;
    
    if (w == NULL || selfp != &(w->cl))
        abort();
    switch (kind) {
        case CCN_UPCALL_FINAL:
            ccn_charbuf_destroy(&w->nb);
            ccn_charbuf_destroy(&w->nv);
            ccn_charbuf_destroy(&w->buffer);
            ccn_charbuf_destroy(&w->cob0);
            free(w);
            break;
        case CCN_UPCALL_INTEREST:
            if (w->closed || w->buffer->length > 0) {
                cob = seqw_next_cob(w);
                if (cob == NULL)
                    return(CCN_UPCALL_RESULT_OK);
                if (ccn_content_matches_interest(cob->buf, cob->length,
                                                 1, NULL,
                                                 info->interest_ccnb,
                                                 info->pi->offset[CCN_PI_E],
                                                 info->pi)) {
                    w->interests_possibly_pending = 0;
                    res = ccn_put(info->h, cob->buf, cob->length);
                    if (res >= 0) {
                        w->buffer->length = 0;
                        w->seqnum++;
                        return(CCN_UPCALL_RESULT_INTEREST_CONSUMED);
                    }
                }
                ccn_charbuf_destroy(&cob);
            }
            if (w->cob0 != NULL) {
                cob = w->cob0;
                if (ccn_content_matches_interest(cob->buf, cob->length,
                                                 1, NULL,
                                                 info->interest_ccnb,
                                                 info->pi->offset[CCN_PI_E],
                                                 info->pi)) {
                    w->interests_possibly_pending = 0;
                    ccn_put(info->h, cob->buf, cob->length);
                    return(CCN_UPCALL_RESULT_INTEREST_CONSUMED);
                }
            }
            w->interests_possibly_pending = 1;
            break;
        default:
            break;
    }
    return(CCN_UPCALL_RESULT_OK);
}

/**
 *
 * Create new face by sending out a request Interest
 * The actual new face instance is returned
 * 
 */
static 
struct ccn_face_instance *create_face(struct ccn *h, struct ccn_charbuf *local_scope_template,
        struct ccn_charbuf *no_name, struct ccn_face_instance *face_instance)
{
	struct ccn_charbuf *newface = NULL;
	struct ccn_charbuf *signed_info = NULL;
	struct ccn_charbuf *temp = NULL;
	struct ccn_charbuf *name = NULL;
	struct ccn_charbuf *resultbuf = NULL;
	struct ccn_parsed_ContentObject pcobuf = {0};
	struct ccn_face_instance *new_face_instance = NULL;
	const unsigned char *ptr = NULL;
	size_t length = 0;
	int res = 0;

	/* Encode the given face instance */
	newface = ccn_charbuf_create();
	ccnb_append_face_instance(newface, face_instance);

	temp = ccn_charbuf_create();
	res = ccn_sign_content(h, temp, no_name, NULL, newface->buf, newface->length);
	resultbuf = ccn_charbuf_create();

	/* Construct the Interest name that will create the face */
	name = ccn_charbuf_create();
	ccn_name_init(name);
	ccn_name_append_str(name, "ccnx");
	ccn_name_append(name, face_instance->ccnd_id, face_instance->ccnd_id_size);
	ccn_name_append_str(name, face_instance->action);
	ccn_name_append(name, temp->buf, temp->length);

	/* send Interest to retrieve Data that contains the newly created face */
	res = ccn_get(h, name, local_scope_template, 1000, resultbuf, &pcobuf, NULL, 0);
	ON_ERROR_CLEANUP(res);

	/* decode Data to get the actual face instance */
	res = ccn_content_get_value(resultbuf->buf, resultbuf->length, &pcobuf, &ptr, &length);
	ON_ERROR_CLEANUP(res);

	new_face_instance = ccn_face_instance_parse(ptr, length);

	ccn_charbuf_destroy(&newface);
	ccn_charbuf_destroy(&signed_info);
	ccn_charbuf_destroy(&temp);
	ccn_charbuf_destroy(&resultbuf);
	ccn_charbuf_destroy(&name);

	return new_face_instance;

	cleanup:
		ccn_charbuf_destroy(&newface);
		ccn_charbuf_destroy(&signed_info);
		ccn_charbuf_destroy(&temp);
		ccn_charbuf_destroy(&resultbuf);
		ccn_charbuf_destroy(&name);

	return NULL;
}

void ccn_dhcp_entry_destroy(struct ccn_dhcp_entry **de)
{
    if (*de != NULL) {
        ccn_charbuf_destroy(&(*de)->name_prefix);
        ccn_charbuf_destroy(&(*de)->store);
        free(*de);
        *de = NULL;
    }
}

/**
 * Destroy the ccnr instance, releasing all associated resources.
 */
PUBLIC void
r_init_destroy(struct ccnr_handle **pccnr)
{
    struct ccnr_handle *h = *pccnr;
    int stable;
    if (h == NULL)
        return;
    stable = h->active_in_fd == -1 ? 1 : 0;
    r_io_shutdown_all(h);
    ccnr_direct_client_stop(h);
    ccn_schedule_destroy(&h->sched);
    hashtb_destroy(&h->propagating_tab);
    hashtb_destroy(&h->nameprefix_tab);
    hashtb_destroy(&h->enum_state_tab);
    hashtb_destroy(&h->content_by_accession_tab);

    // SyncActions sync_stop method should be shutting down heartbeat
    if (h->sync_plumbing) {
        h->sync_plumbing->sync_methods->sync_stop(h->sync_plumbing, NULL);
        free(h->sync_plumbing);
        h->sync_plumbing = NULL;
        h->sync_base = NULL; // freed by sync_stop ?
    }
    
    r_store_final(h, stable);
    
    if (h->fds != NULL) {
        free(h->fds);
        h->fds = NULL;
        h->nfds = 0;
    }
    if (h->fdholder_by_fd != NULL) {
        free(h->fdholder_by_fd);
        h->fdholder_by_fd = NULL;
        h->face_limit = h->face_gen = 0;
    }
    if (h->content_by_cookie != NULL) {
        free(h->content_by_cookie);
        h->content_by_cookie = NULL;
        h->cookie_limit = 1;
    }
    ccn_charbuf_destroy(&h->scratch_charbuf);
    ccn_indexbuf_destroy(&h->skiplinks);
    ccn_indexbuf_destroy(&h->scratch_indexbuf);
    ccn_indexbuf_destroy(&h->unsol);
    if (h->parsed_policy != NULL) {
        ccn_indexbuf_destroy(&h->parsed_policy->namespaces);
        ccn_charbuf_destroy(&h->parsed_policy->store);
        free(h->parsed_policy);
        h->parsed_policy = NULL;
    }
    ccn_charbuf_destroy(&h->policy_name);
    ccn_charbuf_destroy(&h->policy_link_cob);
    ccn_charbuf_destroy(&h->ccnr_keyid);
    free(h);
    *pccnr = NULL;
}

/**
 * Closes the stream and reclaims any resources used by the stream.
 * The stream object will be freed, so the client must not access it again.
 * @returns NULL in all cases.
 */
extern struct ccn_fetch_stream *
ccn_fetch_close(struct ccn_fetch_stream *fs) {
	// destroys a ccn_fetch_stream object
	// implicit abort of any outstanding fetches
	// always returns NULL
	int i;
    FILE *debug = fs->parent->debug;
	ccn_fetch_flags flags = fs->parent->debugFlags;
    
	// make orphans of all outstanding requests
	// CallMe should handle the cleanup
	struct localClosure * this = fs->requests;
	fs->requests = NULL;
	while (this != NULL) {
		this->fs = NULL;
		this = this->next;
	}
	// free up the buffers
	fs->maxBufs = 0;
	PruneSegments(fs);
	
	if (fs->name != NULL)
		ccn_charbuf_destroy(&fs->name);
	if (fs->interest != NULL)
		ccn_charbuf_destroy(&fs->interest);
	struct ccn_fetch *f = fs->parent;
	if (f != NULL) {
		int ns = f->nStreams;
		fs->parent = NULL;
		for (i = 0; i < ns; i++) {
			struct ccn_fetch_stream *tfs = f->streams[i];
			if (tfs == fs) {
				// found it, so get rid of it
				ns--;
				f->nStreams = ns;
				f->streams[i] = NULL;
				f->streams[i] = f->streams[ns];
				f->streams[ns] = NULL;	
				break;	
			}
		}
	}
	if (debug != NULL && (flags & ccn_fetch_flags_NoteOpenClose)) {
		fprintf(debug, 
				"-- ccn_fetch close, %s, segReq %jd, segsRead %jd, timeouts %jd\n",
				fs->id,
				fs->segsRequested,
				fs->segsRead,
				fs->timeoutsSeen);
		fflush(debug);
	}
	// finally, get rid of the stream object
	freeString(fs->id);
	free(fs);
	return NULL;
}

/**
 * Destroy the result of ccn_strategy_selection_parse().
 */
void
ccn_strategy_selection_destroy(struct ccn_strategy_selection **pss)
{
    if (*pss == NULL)
        return;
    ccn_charbuf_destroy(&(*pss)->name_prefix);
    ccn_charbuf_destroy(&(*pss)->store);
    free(*pss);
    *pss = NULL;
}

char * 
get_orig_router_from_lsa_name(struct ccn_charbuf * content_name)
{
	int start=0;

	size_t comp_size;
	const unsigned char *second_last_comp;
	char *second_comp_type;
	char *sep=".";
	char *rem;

	struct ccn_indexbuf *components=ccn_indexbuf_create();
	struct ccn_charbuf *name=ccn_charbuf_create();
	ccn_name_from_uri(name,nlsr->slice_prefix);
	ccn_name_split (name, components);
	start=components->n-2;
	ccn_charbuf_destroy(&name);
	ccn_indexbuf_destroy(&components);

	struct ccn_indexbuf *comps=ccn_indexbuf_create();
	ccn_name_split (content_name, comps);
	ccn_name_comp_get( content_name->buf, comps, 
					  comps->n-1-2, &second_last_comp, &comp_size);

	second_comp_type=strtok_r((char *)second_last_comp, sep, &rem);
	if ( strcmp( second_comp_type, "lsId" ) == 0 ){
		ccn_name_chop(content_name,comps,-3);
	}
	else{
		ccn_name_chop(content_name,comps,-2);
	}
	

	struct ccn_charbuf *temp=ccn_charbuf_create();
	ccn_name_init(temp);	
	ccn_name_append_components( temp,	content_name->buf,
								comps->buf[start+1], 
								comps->buf[comps->n - 1]);

	struct ccn_charbuf *temp1=ccn_charbuf_create();
	ccn_uri_append(temp1, temp->buf, temp->length, 0);

	char *orig_router=(char *)calloc(strlen(ccn_charbuf_as_string(temp1))+1,
																sizeof(char));
	memcpy(orig_router,ccn_charbuf_as_string(temp1),
										strlen(ccn_charbuf_as_string(temp1)));
	orig_router[strlen(orig_router)]='\0';
	
	ccn_charbuf_destroy(&temp);
	ccn_charbuf_destroy(&temp1);
	ccn_indexbuf_destroy(&comps);
	return orig_router;
	

}

/**
 * Verify a signed interest
 *
 * params are as returned in upcall info structure
 * key is what should be used to verify
 *
 * returns:
 * -1 for parsing error
 *  0 for incorrect signature / unverified
 *  1 for proper verification
 *
 */
int verify_signed_interest(const unsigned char *ccnb, const struct ccn_indexbuf *comps,
							  size_t num_comps, size_t start, size_t stop,
							  struct ccn_pkey* key) {

    fprintf(stderr,"verifying signed interest...\n");
    
    // What is info->interest_comps->n ?
    //fprintf(stderr, "Interest components %d\n", (int) info->interest_comps->n);

    unsigned char* comp;
    size_t size;
    int res;

    // Create a charbuf with the matched interest name incl nonce
	struct ccn_charbuf* name = ccn_charbuf_create();
    ccn_name_init(name);
    res = ccn_name_append_components(name, ccnb, start, stop);

    // Last component, should be the signature
    res = ccn_name_comp_get(ccnb, comps,
    						num_comps,
                            (const unsigned char**)&comp, &size);
	if (memcmp(NS_SIGNATURE, comp, NS_SIGNATURE_LEN) != 0) {
		fprintf(stderr, "debug: Last component not tagged as a signature.\n");
		return(-1);
	}
    
	// Parse our nameless, dataless content object that follows the namespace
	// and replace the name with the implicit name from the interest, so that
	// we can use the standard signature verification calls.  Could be made
	// more efficient with different library calls.
	struct ccn_charbuf* co_with_name = ccn_charbuf_create();
    unsigned char* co = &comp[NS_SIGNATURE_LEN];
    replace_name(co_with_name, co, size-NS_SIGNATURE_LEN, name);
	//fprintf(stderr, "replace_name == %d (%s)\n", res, (res==0)?"ok":"fail");

	// For now, use standard routines to verify signature
	struct ccn_parsed_ContentObject pco = {0};

    fprintf(stderr,"verifying signed interest...2\n");
    
	res = ccn_parse_ContentObject(co_with_name->buf, co_with_name->length, &pco, NULL);
	if (!res) {
		// Verify the signature against the authorized public key given to us, passed through to the handler
		res = ccn_verify_signature(co_with_name->buf, pco.offset[CCN_PCO_E], &pco, key );
	} else {
		fprintf(stderr, "debug: Constructed content object parse failed (res==%d)\n", res);
	}
    fprintf(stderr,"verifying signed interest...3\n");
	ccn_charbuf_destroy(&co_with_name);
	ccn_charbuf_destroy(&name);
	return (res);

}

void NdnMediaProcess::initPipe(struct ccn_closure *selfp, struct ccn_upcall_info *info, UserDataBuf *userBuf) {
	fprintf(stderr, "initializing pipe\n");
	// get seq
	const unsigned char *ccnb = info->content_ccnb;
	size_t ccnb_size = info->pco->offset[CCN_PCO_E];
	struct ccn_indexbuf *comps = info->content_comps;

	long seq;
	const unsigned char *seqptr = NULL;
	char *endptr = NULL;
	size_t seq_size = 0;
	int k = comps->n - 2;

	if (userBuf->seq < 0) {
		seq = ccn_ref_tagged_BLOB(CCN_DTAG_Component, ccnb,
				comps->buf[k], comps->buf[k + 1],
				&seqptr, &seq_size);
		if (seq >= 0) {
			seq = strtol((const char *)seqptr, &endptr, 10);
			if (endptr != ((const char *)seqptr) + seq_size)
				seq = -1;
		}
		if (seq >= 0) {
			userBuf->seq = seq;
		}
		else {
			return;
		}
	}	
	
	fprintf(stderr, "fetched content with seq %d\n", seq);
	// send hint-ahead interests
	for (int i = 0; i < hint_ahead; i ++) {
		userBuf->seq++;
		struct ccn_charbuf *pathbuf = ccn_charbuf_create();
		ccn_name_init(pathbuf);
		ccn_name_append_components(pathbuf, ccnb, comps->buf[0], comps->buf[k]);
		struct ccn_charbuf *temp = ccn_charbuf_create();
		ccn_charbuf_putf(temp, "%ld", userBuf->seq);
		ccn_name_append(pathbuf, temp->buf, temp->length);
		
		// no need to trylock as we already have the lock
		// this should use  pipe callback, selfp is normal callback
		int res = ccn_express_interest(info->h, pathbuf, userBuf->data_buf.pipe_callback, NULL);
		if (res < 0) {
			fprintf(stderr, "Sending interest failed at normal processor\n");
			std::exit(1);
		}
		ccn_charbuf_destroy(&pathbuf);
		ccn_charbuf_destroy(&temp);
	}
}

void
ccnr_internal_client_stop(struct ccnr_handle *ccnr)
{
    ccnr->notice = NULL; /* ccn_destroy will free */
    if (ccnr->notice_push != NULL)
        ccn_schedule_cancel(ccnr->sched, ccnr->notice_push);
    ccn_indexbuf_destroy(&ccnr->chface);
    ccn_destroy(&ccnr->internal_client);
    ccn_charbuf_destroy(&ccnr->service_ccnb);
    ccn_charbuf_destroy(&ccnr->neighbor_ccnb);
    if (ccnr->internal_client_refresh != NULL)
        ccn_schedule_cancel(ccnr->sched, ccnr->internal_client_refresh);
}