struct ccndc_data *
ccndc_initialize_data(void) {
struct ccndc_data *self;
const char *msg = "Unable to initialize ccndc";
int res;
self = calloc(1, sizeof(*self));
if (self == NULL) {
ON_ERROR_EXIT (-1, msg);
}
self->ccn_handle = ccn_create();
ON_ERROR_EXIT(ccn_connect(self->ccn_handle, NULL), "Unable to connect to local ccnd");
ON_ERROR_EXIT(ccndc_get_ccnd_id(self), "Unable to obtain ID of local ccnd");
/* Set up an Interest template to indicate scope 1 (Local) */
self->local_scope_template = ccn_charbuf_create();
res = ccnb_element_begin(self->local_scope_template, CCN_DTAG_Interest);
res |= ccnb_element_begin(self->local_scope_template, CCN_DTAG_Name);
res |= ccnb_element_end(self->local_scope_template); /* </Name> */
res |= ccnb_tagged_putf(self->local_scope_template, CCN_DTAG_Scope, "1");
res |= ccnb_element_end(self->local_scope_template); /* </Interest> */
ON_ERROR_EXIT(res, msg);
/* Create a null name */
self->no_name = ccn_charbuf_create();
ON_ERROR_EXIT(ccn_name_init(self->no_name), msg);
self->lifetime = (~0U) >> 1;
return self;
}
/**
* 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);
}
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;
}
/**
*
* 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;
}
static int
add_delete_ccn_face(struct ccn *h, const char *uri, const char *address, const unsigned int p, int operation)
{
struct ccn_charbuf *prefix;
char port[6];
struct ccn_charbuf *local_scope_template = ccn_charbuf_create();
struct ccn_charbuf *no_name = ccn_charbuf_create();
unsigned char ccndid_storage[32] = {0};
unsigned char *ccndid = ccndid_storage;
size_t ccndid_size = 0;
struct ccn_face_instance *fi;
struct ccn_face_instance *nfi;
int res;
prefix = ccn_charbuf_create();
res = ccn_name_from_uri(prefix, uri);
ON_ERROR_CLEANUP(res);
memset(port, 0, 6);
sprintf(port, "%d", p);
init_data(local_scope_template, no_name);
ccndid_size = get_ccndid(h, local_scope_template, ccndid);
if (ccndid_size != sizeof(ccndid_storage))
{
fprintf(stderr, "Incorrect size for ccnd id in response\n");
ON_ERROR_CLEANUP(-1);
}
/* construct a face instance for new face request */
fi = construct_face(ccndid, ccndid_size, address, port);
ON_NULL_CLEANUP(fi);
/* send new face request to actually create a new face */
nfi = create_face(h, local_scope_template, no_name, fi);
ON_NULL_CLEANUP(nfi);
res = register_unregister_prefix(h, local_scope_template, no_name, prefix, nfi, operation);
ON_ERROR_CLEANUP(res);
ccn_charbuf_destroy(&local_scope_template);
ccn_charbuf_destroy(&no_name);
ccn_face_instance_destroy(&fi);
ccn_face_instance_destroy(&nfi);
ccn_charbuf_destroy(&prefix);
return 0;
cleanup:
ccn_charbuf_destroy(&prefix);
ccn_charbuf_destroy(&local_scope_template);
ccn_charbuf_destroy(&no_name);
ccn_face_instance_destroy(&fi);
ccn_face_instance_destroy(&nfi);
return -1;
}
int
get_content_by_content_name(char *content_name, unsigned char **content_data,
char *orig_router)
{
int ret=-1;
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *templ = NULL;
struct ccn_charbuf *resultbuf = NULL;
struct ccn_parsed_ContentObject pcobuf = { 0 };
int res;
int allow_stale = 1;
int content_only = 1;
int scope = -1;
const unsigned char *ptr,*ptr_in;
size_t length,length_in;
int resolve_version = CCN_V_HIGHEST;
int timeout_ms = 3000;
const unsigned lifetime_default = CCN_INTEREST_LIFETIME_SEC << 12;
unsigned lifetime_l12 = lifetime_default;
int get_flags = 0;
name = ccn_charbuf_create();
res = ccn_name_from_uri(name,content_name);
if (res < 0) {
fprintf(stderr, "Bad ccn URI: %s\n", content_name);
ccn_charbuf_destroy(&name);
return ret;
}
if (allow_stale || lifetime_l12 != lifetime_default || scope != -1) {
templ = ccn_charbuf_create();
ccn_charbuf_append_tt(templ, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(templ, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(templ); /* </Name> */
if (allow_stale) {
ccn_charbuf_append_tt(templ, CCN_DTAG_AnswerOriginKind, CCN_DTAG);
ccnb_append_number(templ,
CCN_AOK_DEFAULT | CCN_AOK_STALE);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
}
if (scope != -1) {
ccnb_tagged_putf(templ, CCN_DTAG_Scope, "%d", scope);
}
if (lifetime_l12 != lifetime_default) {
/*
* Choose the interest lifetime so there are at least 3
* expressions (in the unsatisfied case).
*/
unsigned char buf[3] = { 0 };
int i;
for (i = sizeof(buf) - 1; i >= 0; i--, lifetime_l12 >>= 8)
buf[i] = lifetime_l12 & 0xff;
ccnb_append_tagged_blob(templ, CCN_DTAG_InterestLifetime, buf,
sizeof(buf));
}
int ccn_dhcp_content_parse(const unsigned char *p, size_t size, struct ccn_dhcp_entry *tail)
{
struct ccn_buf_decoder decoder;
struct ccn_buf_decoder *d = ccn_buf_decoder_start(&decoder, p, size);
int i;
int count;
struct ccn_dhcp_entry *de = tail;
if (ccn_buf_match_dtag(d, CCN_DTAG_Entry)) {
ccn_buf_advance(d);
count = ccn_parse_optional_tagged_nonNegativeInteger(d, CCN_DTAG_Count);
for (i = 0; i < count; i ++) {
struct ccn_charbuf *store = ccn_charbuf_create();
size_t start;
size_t end;
int host_off = -1;
int port_off = -1;
de->next = calloc(1, sizeof(*de));
de = de->next;
memset(de, 0, sizeof(*de));
de->store = store;
de->next = NULL;
if (ccn_buf_match_dtag(d, CCN_DTAG_Name)) {
de->name_prefix = ccn_charbuf_create();
start = d->decoder.token_index;
ccn_parse_Name(d, NULL);
end = d->decoder.token_index;
ccn_charbuf_append(de->name_prefix, p + start, end - start);
}
else
de->name_prefix = NULL;
host_off = ccn_parse_tagged_string(d, CCN_DTAG_Host, store);
port_off = ccn_parse_tagged_string(d, CCN_DTAG_Port, store);
char *b = (char *)store->buf;
char *h = b + host_off;
char *p = b + port_off;
if (host_off >= 0)
memcpy((void *)de->address, h, strlen(h));
if (port_off >= 0)
memcpy((void *)de->port, p, strlen(p));
}
}
else
d->decoder.state = -__LINE__;
if (d->decoder.index != size || !CCN_FINAL_DSTATE(d->decoder.state))
ccn_dhcp_content_destroy(tail->next);
return count;
}
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);
}
/**
* Base loop for the background CCN task
*
* This is the main execution loop for the background task responsible for
* interacting with the CCN network. It is from this point that many of the above methods are
* called to work the inbound messages from ccnx as well as sending out the data messages.
*
* \param data the task context information setup by the parent sink element thread
*/
static void
ccn_event_thread (void *data)
{
Gstccnxsink *me = (Gstccnxsink *) data;
struct ccn_charbuf *filtName;
struct ccn_charbuf *temp;
int res = 0;
GST_DEBUG ("CCNxSink event: *** event thread starting");
temp = ccn_charbuf_create ();
filtName = ccn_charbuf_create ();
/* A closure is what defines what to do when an inbound interest arrives */
if ((me->ccn_closure = calloc (1, sizeof (struct ccn_closure))) == NULL) {
GST_ELEMENT_ERROR (me, RESOURCE, READ, (NULL), ("closure alloc failed"));
return;
}
/* We setup the closure to contain the sink element context reference, and also tell it what function to call */
me->ccn_closure->data = me;
me->ccn_closure->p = new_interests;
me->timeouts = 0;
ccn_charbuf_append (filtName, me->name->buf, me->name->length);
/* This call will set up a handler for interests we expect to get from clients */
// hDump(DUMP_ADDR(filtName->buf), DUMP_SIZE(filtName->length));
ccn_set_interest_filter (me->ccn, filtName, me->ccn_closure);
GST_DEBUG ("CCNxSink event: interest filter registered\n");
/* Some debugging information */
temp->length = 0;
ccn_uri_append (temp, me->name->buf, me->name->length, TRUE);
GST_DEBUG ("CCNxSink event: using uri: %s\n", ccn_charbuf_as_string (temp));
/* Now that the interest is registered, we loop around waiting for something to do */
/* We pass control to ccnx for a while so it can work with any incoming or outgoing data */
/* and then we check our fifo queue for work to do. That's about it! */
/* We check to see if any problems have caused our ccnd connection to fail, and we reconnect */
while (res >= 0) {
GST_DEBUG ("CCNxSink event: *** looping");
res = ccn_run (me->ccn, 50);
check_fifo (me);
if (res < 0 && ccn_get_connection_fd (me->ccn) == -1) {
GST_DEBUG ("CCNxSink event: need to reconnect...");
/* Try reconnecting, after a bit of delay */
msleep ((30 + (getpid () % 30)) * 1000);
res = ccn_connect (me->ccn, ccndHost ());
}
}
GST_DEBUG ("CCNxSink event: *** event thread ending");
}
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);
}
}
int NdnMediaProcess::checkInterest()
{
int res = 0;
QHash<QString,UserDataBuf *>::iterator it;
ruMutex->lock();
for ( it = qhRemoteUser.begin(); it != qhRemoteUser.end(); ++it ) {
if (!it.value()->interested) {
/* Use a template to express our order preference for the first packet. */
struct ccn_charbuf *templ = ccn_charbuf_create();
struct ccn_charbuf *path = ccn_charbuf_create();
ccn_charbuf_append_tt(templ, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(templ, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(templ);
ccn_charbuf_append_tt(templ, CCN_DTAG_ChildSelector, CCN_DTAG);
ccn_charbuf_append_tt(templ, 1, CCN_UDATA);
ccn_charbuf_append(templ, "1", 1); /* low bit 1: rightmost */
ccn_charbuf_append_closer(templ); /*<ChildSelector>*/
ccn_charbuf_append_closer(templ);
ccn_name_from_uri(path, it.key().toLocal8Bit().constData());
ccn_name_append_str(path, "audio");
if (res >= 0) {
if (it.value()->data_buf.callback->p == NULL) {fprintf(stderr, "data_buf.callback is NULL!\n"); exit(1); }
/*
int c = 0;
while (pthread_mutex_trylock(&ccn_mutex) != 0) {
c++;
if (c > 10000000) {
fprintf(stderr, "cannot obtain lock! %s:%d\n", __FILE__, __LINE__);
std::exit(1);
}
}
*/
pthread_mutex_lock(&ccn_mutex);
res = ccn_express_interest(ndnState.ccn, path, it.value()->data_buf.callback, templ);
pthread_mutex_unlock(&ccn_mutex);
it.value()->interested = 1;
fprintf(stderr, "short interest sent\n");
}
if (res < 0) {
fprintf(stderr, "sending the first interest failed\n");
exit(1);
}
ccn_charbuf_destroy(&path);
ccn_charbuf_destroy(&templ);
}
}
ruMutex->unlock();
return res;
}
struct ccn_proxy *
ccn_proxy_init(const char *filter_uri,
const char *prefix_uri)
{
struct ccn_proxy *proxy = calloc(1, sizeof(struct ccn_proxy));
struct ccn_buf_decoder decoder;
struct ccn_buf_decoder *d = &decoder;
int res;
DEBUG_PRINT("IN %d %s\n", __LINE__, __func__);
/* Convert URI to name this proxy is responsible for */
proxy->prefix = ccn_charbuf_create();
res = ccn_name_from_uri(proxy->prefix, prefix_uri);
if (res < 0) {
DEBUG_PRINT("ABORT %d %s bad ccn URI: %s\n", __LINE__, __func__, prefix_uri);
abort();
}
d = ccn_buf_decoder_start(d, proxy->prefix->buf, proxy->prefix->length);
proxy->prefix_comps = ccn_indexbuf_create();
proxy->prefix_ncomps = ccn_parse_Name(d, proxy->prefix_comps);
proxy->filter = ccn_charbuf_create();
res = ccn_name_from_uri(proxy->filter, filter_uri);
if (res < 0) {
DEBUG_PRINT("ABORT %d %s bad ccn URI: %s\n", __LINE__, __func__, filter_uri);
abort();
}
/* Initialization should be done by ccn_proxy_connect() */
proxy->handle_name = ccn_charbuf_create();
ccn_charbuf_append_string(proxy->handle_name, "in/outb");
DEBUG_PRINT("OUT %d %s\n", __LINE__, __func__);
return(proxy);
}
int
sync_cb(struct ccns_handle *h,
struct ccn_charbuf *lhash,
struct ccn_charbuf *rhash,
struct ccn_charbuf *name)
{
char *hexL;
char *hexR;
struct ccn_charbuf *uri = ccn_charbuf_create();
ccn_uri_append(uri, name->buf, name->length, 1);
if (lhash == NULL || lhash->length == 0) {
hexL = strdup("none");
} else
hexL = hex_string(lhash->buf, lhash->length);
if (rhash == NULL || rhash->length == 0) {
hexR = strdup("none");
} else
hexR = hex_string(rhash->buf, rhash->length);
printf("%s %s %s\n", ccn_charbuf_as_string(uri), hexL, hexR);
fflush(stdout);
free(hexL);
free(hexR);
ccn_charbuf_destroy(&uri);
return(0);
}
/*
* utility, may need to be exported, to parse the buffer into a given slice
* structure.
*/
static int
slice_parse(struct ccns_slice *s, const unsigned char *p, size_t size) {
int res = 0;
struct ccn_buf_decoder decoder;
struct ccn_buf_decoder *d = ccn_buf_decoder_start(&decoder, p, size);
uintmax_t version;
int op;
int start;
struct ccn_charbuf *clause = NULL;
if (!ccn_buf_match_dtag(d, CCN_DTAG_SyncConfigSlice))
return (-1);
ccn_buf_advance(d);
if (!ccn_buf_match_dtag(d, CCN_DTAG_SyncVersion))
return (-1);
ccn_buf_advance(d);
ccn_parse_uintmax(d, &version);
ccn_buf_check_close(d);
if (version != SLICE_VERSION)
return (-1);
start = d->decoder.token_index;
if (ccn_parse_Name(d, NULL) < 0)
return(-1);
ccn_charbuf_reset(s->topo);
res = ccn_charbuf_append(s->topo, p + start, d->decoder.token_index - start);
if (res < 0)
return(-1);
start = d->decoder.token_index;
if (ccn_parse_Name(d, NULL) < 0)
return(-1);
ccn_charbuf_reset(s->prefix);
res = ccn_charbuf_append(s->prefix, p + start, d->decoder.token_index - start);
if (res < 0)
return(-1);
if (!ccn_buf_match_dtag(d, CCN_DTAG_SyncConfigSliceList))
return(-1);
ccn_buf_advance(d);
clause = ccn_charbuf_create();
if (clause == NULL)
return(-1);
while (ccn_buf_match_dtag(d, CCN_DTAG_SyncConfigSliceOp)) {
ccn_buf_advance(d);
op = ccn_parse_nonNegativeInteger(d); // op is a small integer
ccn_buf_check_close(d);
if (op != 0)
break;
ccn_charbuf_reset(clause);
start = d->decoder.token_index;
if (ccn_parse_Name(d, NULL) < 0)
break;
res = ccn_charbuf_append(clause, p + start, d->decoder.token_index - start);
ccns_slice_add_clause(s, clause);
}
ccn_charbuf_destroy(&clause);
ccn_buf_check_close(d); /* </SyncConfigSliceList> */
ccn_buf_check_close(d); /* </SyncConfigSlice> */
if (d->decoder.index != size || !CCN_FINAL_DSTATE(d->decoder.state))
return(-1);
return(0);
}
/**
* Produce ccnr debug output.
* Output is produced via h->logger under the control of h->debug;
* prepends decimal timestamp and process identification.
* Caller should not supply newlines.
* @param h the ccnr handle
* @param fmt printf-like format string
*/
void
ccnr_msg(struct ccnr_handle *h, const char *fmt, ...)
{
struct timeval t;
va_list ap;
struct ccn_charbuf *b;
int res;
if (h == NULL || h->debug == 0 || h->logger == 0)
return;
b = ccn_charbuf_create();
if (b == NULL)
return;
gettimeofday(&t, NULL);
if ((h->debug >= CCNL_FINE) &&
((h->logbreak-- < 0 && t.tv_sec != h->logtime) ||
t.tv_sec >= h->logtime + 30)) {
ccn_charbuf_putf(b, "%ld.000000 ccnr[%d]: %s ____________________ %s",
(long)t.tv_sec, h->logpid, h->portstr ? h->portstr : "", ctime(&t.tv_sec));
h->logtime = t.tv_sec;
h->logbreak = 30;
}
ccn_charbuf_putf(b, "%ld.%06u ccnr[%d]: %s\n",
(long)t.tv_sec, (unsigned)t.tv_usec, h->logpid, fmt);
va_start(ap, fmt);
/* b should already have null termination, but use call for cleanliness */
res = (*h->logger)(h->loggerdata, ccn_charbuf_as_string(b), ap);
va_end(ap);
ccn_charbuf_destroy(&b);
/* if there's no one to hear, don't make a sound */
if (res < 0)
h->debug = 0;
}
/**
* Make a new fdholder corresponding to the fd
*/
PUBLIC struct fdholder *
r_io_record_fd(struct ccnr_handle *h, int fd,
void *who, socklen_t wholen,
int setflags)
{
int res;
struct fdholder *fdholder = NULL;
res = fcntl(fd, F_SETFL, O_NONBLOCK);
if (res == -1)
ccnr_msg(h, "fcntl: %s", strerror(errno));
fdholder = calloc(1, sizeof(*fdholder));
if (fdholder == NULL)
return(fdholder);
fdholder->name = ccn_charbuf_create();
if (fdholder->name == NULL)
abort();
if (who != NULL)
ccn_charbuf_append(fdholder->name, who, wholen);
fdholder->filedesc = fd;
init_face_flags(h, fdholder, setflags);
res = r_io_enroll_face(h, fdholder);
if (res == -1) {
ccn_charbuf_destroy(&fdholder->name);
free(fdholder);
fdholder = NULL;
}
return(fdholder);
}
static struct ccn_charbuf *
ccn_charbuf_duplicate(struct ccn_charbuf *c)
{
struct ccn_charbuf *ans = ccn_charbuf_create();
ccn_charbuf_append(ans, c->buf, c->length);
return(ans);
}
/**
* Produce ccnd debug output.
* Output is produced via h->logger under the control of h->debug;
* prepends decimal timestamp and process identification.
* Caller should not supply newlines.
* @param h the ccnd handle
* @param fmt printf-like format string
*/
void
ccnd_msg(struct ccnd_handle *h, const char *fmt, ...)
{
struct timeval t;
va_list ap;
struct ccn_charbuf *b;
int res;
const char *portstr;
if (h == NULL || h->debug == 0 || h->logger == 0)
return;
b = ccn_charbuf_create();
gettimeofday(&t, NULL);
if (((h->debug & 64) != 0) &&
((h->logbreak-- < 0 && t.tv_sec != h->logtime) ||
t.tv_sec >= h->logtime + 30)) {
portstr = h->portstr;
if (portstr == NULL)
portstr = "";
ccn_charbuf_putf(b, "%ld.000000 ccnd[%d]: %s ____________________ %s",
(long)t.tv_sec, h->logpid, h->portstr, ctime(&t.tv_sec));
h->logtime = t.tv_sec;
h->logbreak = 30;
}
ccn_charbuf_putf(b, "%ld.%06u ccnd[%d]: %s\n",
(long)t.tv_sec, (unsigned)t.tv_usec, h->logpid, fmt);
va_start(ap, fmt);
res = (*h->logger)(h->loggerdata, (const char *)b->buf, ap);
va_end(ap);
ccn_charbuf_destroy(&b);
/* if there's no one to hear, don't make a sound */
if (res < 0)
h->debug = 0;
}
static int
post_face_notice(struct ccnr_handle *ccnr, unsigned filedesc)
{
struct fdholder *fdholder = ccnr_r_io_fdholder_from_fd(ccnr, filedesc);
struct ccn_charbuf *msg = ccn_charbuf_create();
int res = -1;
int port;
// XXX - text version for trying out stream stuff - replace with ccnb
if (fdholder == NULL)
ccn_charbuf_putf(msg, "destroyface(%u);\n", filedesc);
else {
ccn_charbuf_putf(msg, "newface(%u, 0x%x", filedesc, fdholder->flags);
if (fdholder->name->length != 0 &&
(fdholder->flags & (CCNR_FACE_INET | CCNR_FACE_INET6)) != 0) {
ccn_charbuf_putf(msg, ", ");
port = ccn_charbuf_append_sockaddr(msg, (struct sockaddr *)fdholder->name->buf);
if (port < 0)
msg->length--;
else if (port > 0)
ccn_charbuf_putf(msg, ":%d", port);
}
ccn_charbuf_putf(msg, ");\n", filedesc);
}
res = ccn_seqw_write(ccnr->notice, msg->buf, msg->length);
ccn_charbuf_destroy(&msg);
return(res);
}
PyObject *
CCNObject_New_charbuf(enum _pyccn_capsules type,
struct ccn_charbuf **charbuf)
{
struct ccn_charbuf *p;
PyObject *py_o;
assert(type == CONTENT_OBJECT ||
type == EXCLUSION_FILTER ||
type == INTEREST ||
type == KEY_LOCATOR ||
type == NAME ||
type == SIGNATURE ||
type == SIGNED_INFO);
p = ccn_charbuf_create();
if (!p)
return PyErr_NoMemory();
py_o = CCNObject_New(type, p);
if (!py_o) {
ccn_charbuf_destroy(&p);
return NULL;
}
if (charbuf)
*charbuf = p;
return py_o;
}
struct ccn_charbuf* CcnbOR_read(CcnbOR self) {
if (NBS_error(self->nbs)) {
self->error = true;
return NULL;
}
uint8_t* buf = (uint8_t*)malloc(2048);
size_t readSize = NBS_read(self->nbs, buf, 2048, NULL);
if (readSize == 0) {
free(buf);
return NULL;
}
ssize_t consumeSize = ccn_skeleton_decode(self->rd, buf, readSize);
if (self->rd->state < 0) self->error = true;
else ccn_charbuf_append(self->cbuf, buf, consumeSize);
if (consumeSize < readSize) NBS_pushback(self->nbs, buf, consumeSize, readSize - consumeSize, NULL);
else free(buf);
if (CCN_FINAL_DSTATE(self->rd->state)) {
struct ccn_charbuf* cbuf = self->cbuf;
self->cbuf = ccn_charbuf_create();
CcnbOR_clear(self);
return cbuf;
}
return NULL;
}
void CcnCC_sendContent(CcnCC self, struct ccn_charbuf* name, TimeSpan expires, void* data, size_t size) {
struct ccn_signing_params sp = CCN_SIGNING_PARAMS_INIT;
if (expires >= 0) {
sp.template_ccnb = ccn_charbuf_create();
ccn_charbuf_append_tt(sp.template_ccnb, CCN_DTAG_SignedInfo, CCN_DTAG);
ccnb_tagged_putf(sp.template_ccnb, CCN_DTAG_FreshnessSeconds, "%ld", expires / 1000);
sp.sp_flags |= CCN_SP_TEMPL_FRESHNESS;
ccn_charbuf_append_closer(sp.template_ccnb);
}
struct ccn_charbuf* content = ccn_charbuf_create();
if (0 == ccn_sign_content(self->ccnh, content, name, &sp, data, size)) {
ccn_put(self->ccnh, content->buf, content->length);
}
ccn_charbuf_destroy(&sp.template_ccnb);
ccn_charbuf_destroy(&content);
}
int
gen_test(struct ccn_charbuf **name, struct ccn_indexbuf **comps)
{
int res;
intmax_t secs = 1234567890;
int nsecs = 6000000;
*name = ccn_charbuf_create();
ccn_name_init(*name);
res = ccn_create_version(NULL, *name, 0, secs, nsecs);
if (res < 0) {
printf("Unable to create version\n");
return(-__LINE__);
}
*comps = ccn_indexbuf_create();
struct ccn_buf_decoder decoder;
struct ccn_buf_decoder *d = &decoder;
ccn_buf_decoder_start(d, (*name)->buf, (*name)->length);
res = ccn_parse_Name(d, *comps);
if (res < 0) {
printf("Unable to parse name\n");
return(-__LINE__);
}
return(0);
}
int main()
{
struct ccn *ccn = NULL;
struct ccn_charbuf *name = NULL;
int res;
struct ccn_closure *incoming = NULL;
ccn = ccn_create();
if (ccn_connect(ccn, NULL) == -1)
{
perror("Could not connect to ccnd");
exit(1);
}
incoming = calloc(1, sizeof(*incoming));
incoming->p = &incoming_content;
name = ccn_charbuf_create();
res = ccn_name_from_uri(name, "ccnx:/FOX/test");
//ccn_express_persistent_interest(ccn, name, incoming, NULL, 1);
ccn_express_interest(ccn, name, incoming, NULL);
printf("Interests send\n", res);
res = ccn_run(ccn, 10000);
return 0;
}
static void
ccn_publish_client_mountpoint()
{
dropbear_log(LOG_WARNING,"Enter ccn_publish_client_mountpoint");
int result;
struct ccn_charbuf *mountpoint;
char client_id_str[6];
char *client_name_str = NULL;
mountpoint = ccn_charbuf_create();
if( mountpoint == NULL )
dropbear_exit("Failed to allocate client mountpoint charbuf");
client_name_str = strdup((const char*)cli_opts.ccnxdomain);
strcat(client_name_str,"/ssh/");
sprintf(client_id_str,"%6d",rand());
strcat(client_name_str,client_id_str);
cli_opts.ccnxdomain = client_name_str;
result = ccn_name_from_uri(mountpoint,cli_opts.ccnxdomain);
if( result < 0 )
dropbear_exit("Can't resolve client domain");
dropbear_log(LOG_WARNING,"Listening at");
print_ccnb_charbuf(mountpoint);
result = ccn_set_interest_filter(cli_opts.ssh_ccn,mountpoint,&newServerAction);
}
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);
}
void GroupManager::enumerate() {
ccn_charbuf *interest_path = NULL;
ccn_charbuf *templ = NULL;
interest_path = ccn_charbuf_create();
if (interest_path == NULL ) {
return;
}
ccn_name_from_uri(interest_path, BROADCAST_PREFIX);
ccn_name_append_str(interest_path, confName.toLocal8Bit().constData());
ccn_name_append_str(interest_path, "speaker-list");
// update exclusive filter according to recently known remote users
QHash<QString, RemoteUser *>::const_iterator it = (pGroupManager->qhRemoteUsers).constBegin();
QList<QString> toExclude;
while (it != (pGroupManager->qhRemoteUsers).constEnd())
{
RemoteUser *ru = it.value();
if (ru && !ru->needRefresh()) {
toExclude.append(ru->getName());
}
++it;
}
// TODO: do not exclude local user (when staleness comes to play)
// always exclude localuser by now
toExclude.append(userName);
expressEnumInterest(interest_path, toExclude);
}
/**
* Write a ccns_slice object to a repository.
* @param h is the ccn_handle on which to write.
* @param slice is a pointer to a ccns_slice object to be written.
* @param name, if non-NULL, is a pointer to a charbuf which will be filled
* in with the name of the slice that was written.
* @returns 0 on success, -1 otherwise.
*/
int
ccns_write_slice(struct ccn *h,
struct ccns_slice *slice,
struct ccn_charbuf *name) {
struct ccn_charbuf *n = NULL;
int res;
// calculate versioned and segmented name for the slice
n = ccn_charbuf_create();
if (n == NULL)
return(-1);
res = ccns_slice_name(n, slice);
if (res < 0)
goto Cleanup;
res |= ccn_create_version(h, n, CCN_V_NOW, 0, 0);
if (name != NULL) {
ccn_charbuf_reset(name);
res |= ccn_charbuf_append_charbuf(name, n);
}
res |= ccn_name_append_numeric(n, CCN_MARKER_SEQNUM, 0);
if (res < 0)
goto Cleanup;
res = write_slice(h, slice, n);
Cleanup:
ccn_charbuf_destroy(&n);
return (res);
}
static struct ccn_charbuf *
resolve_templ(struct ccn_charbuf *templ, unsigned const char *vcomp, int size)
{
if (templ == NULL)
templ = ccn_charbuf_create();
if (size < 3 || size > 16) {
ccn_charbuf_destroy(&templ);
return(NULL);
}
templ->length = 0;
ccn_charbuf_append_tt(templ, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(templ, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(templ); /* </Name> */
ccn_charbuf_append_tt(templ, CCN_DTAG_Exclude, CCN_DTAG);
append_filter_all(templ);
ccn_charbuf_append_tt(templ, CCN_DTAG_Component, CCN_DTAG);
ccn_charbuf_append_tt(templ, size, CCN_BLOB);
ccn_charbuf_append(templ, vcomp, size);
ccn_charbuf_append_closer(templ); /* </Component> */
append_future_vcomp(templ);
append_filter_all(templ);
ccn_charbuf_append_closer(templ); /* </Exclude> */
answer_highest(templ);
answer_passive(templ);
ccn_charbuf_append_closer(templ); /* </Interest> */
return(templ);
}
