void content_received(struct ccn_upcall_info *info, struct ccn_closure *selfp) {
UserDataBuf *userBuf = (UserDataBuf *)selfp->data;
struct data_buffer *buffer = &userBuf->data_buf;
const unsigned char *content_value;
NDNState *state = buffer->state;
const unsigned char *ccnb = info->content_ccnb;
size_t ccnb_size = info->pco->offset[CCN_PCO_E];
struct ccn_indexbuf *comps = info->content_comps;
/* Append it to the queue */
struct buf_list *b;
b = (struct buf_list *)calloc(1, sizeof(*b));
b->link = NULL;
ccn_content_get_value(ccnb, ccnb_size, info->pco,
&content_value, &b->len);
b->buf = malloc(b->len);
memcpy(b->buf, content_value, b->len);
if (buffer->buflist == NULL)
buffer->buflist = b;
else {
struct buf_list *p = buffer->buflist;
while (p->link != NULL)
p = p->link;
p->link = b;
}
/*emit the signal for get the data out of the buffer*/
state->emitSignal(userBuf->user_name);
}
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;
}
// extractNode parses and creates a sync tree node from an upcall info
// returns NULL if there was any kind of error
static struct SyncNodeComposite *
extractNode(struct SyncRootStruct *root, struct ccn_upcall_info *info) {
// first, find the content
char *here = "sync_track.extractNode";
const unsigned char *cp = NULL;
size_t cs = 0;
size_t ccnb_size = info->pco->offset[CCN_PCO_E];
const unsigned char *ccnb = info->content_ccnb;
int res = ccn_content_get_value(ccnb, ccnb_size, info->pco,
&cp, &cs);
if (res < 0 || cs < DEFAULT_HASH_BYTES) {
SyncNoteFailed(root, here, "ccn_content_get_value", __LINE__);
return NULL;
}
// second, parse the object
struct SyncNodeComposite *nc = SyncAllocComposite(root->base);
struct ccn_buf_decoder ds;
struct ccn_buf_decoder *d = ccn_buf_decoder_start(&ds, cp, cs);
res |= SyncParseComposite(nc, d);
if (res < 0) {
// failed, so back out of the allocations
SyncNoteFailed(root, here, "bad parse", -res);
SyncFreeComposite(nc);
nc = NULL;
}
return nc;
}
/**
*
* 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;
}
/*
* newServerHandler
*
* Expecting a string containing the URI for the client
*/
static enum ccn_upcall_res
newServerHandler(struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info)
{
dropbear_log(LOG_WARNING,"Enter newServerHandler");
dropbear_log(LOG_WARNING,"Got interest matching %d components, kind = %d\n", info->matched_comps, kind);
int result;
const unsigned char *ccnb = NULL;
size_t ccnb_size;
void *data = NULL;
size_t data_size = 0;
switch (kind) {
case CCN_UPCALL_CONTENT:
break;
case CCN_UPCALL_INTEREST_TIMED_OUT:
return CCN_UPCALL_RESULT_REEXPRESS;
case CCN_UPCALL_CONTENT_UNVERIFIED:
// TODO: fix verification
break;
default:
return CCN_UPCALL_RESULT_ERR;
}
dropbear_log(LOG_WARNING,"Interest to");
print_ccnb_name(info);
ccnb = info->content_ccnb;
ccnb_size = info->pco->offset[CCN_PCO_E];
result = ccn_content_get_value(ccnb, ccnb_size, info->pco, (const unsigned char **)&data, &data_size);
if( result < 0 )
dropbear_exit("Could not parse reply message");
dropbear_log(LOG_WARNING,"newServerHandler: parsing contents");
if( strncmp((char *)data,"ccnx:/",6) == 0 ) {
cli_opts.remote_name_str = (char *)data;
dropbear_log(LOG_WARNING,"newServerHandler: matches: %s (%d)",data,data_size);
ses.remote_name = ccn_charbuf_create();
result = ccn_name_from_uri(ses.remote_name,cli_opts.remote_name_str);
if( result < 0 )
dropbear_exit("Did not find expected uri in server response");
// Start a new session
dropbear_log(LOG_WARNING,"Connected to server at");
print_ccnb_charbuf(ses.remote_name);
cli_session(cli_opts.ccnxdomain,cli_opts.remote_name_str);
return CCN_UPCALL_RESULT_OK;
} else {
dropbear_log(LOG_WARNING,"newServerHandler: doesn't match");
return CCN_UPCALL_RESULT_ERR;
}
}
BytesPtr
ParsedContentObject::contentPtr() const
{
const unsigned char *content;
size_t len;
int res = ccn_content_get_value(head(m_bytes), m_pco.offset[CCN_PCO_E], &m_pco, &content, &len);
if (res < 0)
{
boost::throw_exception(MisformedContentObjectException());
}
return readRawPtr (content, len);
}
int
decode_message(struct ccn_charbuf *message, struct path * name_path, char *data, size_t len,
const void *verkey) {
struct ccn_parsed_ContentObject content;
struct ccn_indexbuf *comps = ccn_indexbuf_create();
const unsigned char * content_value;
size_t content_length;
int res = 0;
int i;
memset(&content, 0x33, sizeof(content));
if (ccn_parse_ContentObject(message->buf, message->length, &content, comps) != 0) {
printf("Decode failed to parse object\n");
res = -1;
}
if (comps->n-1 != name_path->count) {
printf("Decode got wrong number of path components: %d vs. %d\n",
(int)(comps->n-1), name_path->count);
res = -1;
}
for (i=0; i<name_path->count; i++) {
if (ccn_name_comp_strcmp(message->buf, comps, i, name_path->comps[i]) != 0) {
printf("Decode mismatch on path component %d\n", i);
res = -1;
}
}
if (ccn_content_get_value(message->buf, message->length, &content,
&content_value, &content_length) != 0) {
printf("Cannot retrieve content value\n");
res = -1;
} else if (content_length != len) {
printf("Decode mismatch on content length %d vs. %d\n",
(int)content_length, (int)len);
res = -1;
} else if (memcmp(content_value, data, len) != 0) {
printf("Decode mismatch of content\n");
res = -1;
}
if (ccn_verify_signature(message->buf, message->length, &content, verkey) != 1) {
printf("Signature did not verify\n");
res = -1;
}
ccn_indexbuf_destroy(&comps);
return res;
}
void GroupManager::incomingContent(ccn_upcall_info *info) {
size_t len = 0;
unsigned char *valuep = NULL;
ccn_content_get_value(info->content_ccnb, info->pco->offset[CCN_PCO_E],
info->pco,
(const unsigned char **)&valuep, &len);
if (-1 == parseXmlUserList(valuep, len)) {
debug("Invalid user list format received");
}
if (valuep != NULL) {
valuep = NULL;
}
// already have the lock
enumerate();
}
static enum ccn_upcall_res
incoming_handler(
struct ccn_closure* selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info* info)
{
unsigned int i;
int res;
const unsigned char *ptr;
size_t length;
printf("Received response (kind: %d)\n", kind);
switch(kind) {
case CCN_UPCALL_FINAL:
printf("deregistering handler\n");
return CCN_UPCALL_RESULT_OK;
case CCN_UPCALL_CONTENT:
printf("received content\n");
res = ccn_content_get_value(info->content_ccnb, info->pco->offset[CCN_PCO_E], info->pco, &ptr, &length);
printf("Output: ");
for (i = 0; i < length; i++) {
putchar(ptr[i]);
}
break;
case CCN_UPCALL_INTEREST_TIMED_OUT:
printf("request timed out - retrying\n");
return CCN_UPCALL_RESULT_REEXPRESS;
case CCN_UPCALL_CONTENT_UNVERIFIED:
case CCN_UPCALL_CONTENT_BAD:
printf("error\n");
return CCN_UPCALL_RESULT_ERR;
default:
printf("Unexpected response\n");
return CCN_UPCALL_RESULT_ERR;
}
return CCN_UPCALL_RESULT_OK;
}
/**
* Request the current segment number from the ccnx data producer
*
* This is a request for meta data for the media stream the user has named with their URI.
* We assume that they want to join the media broadcast from what is currently being published
* and \em not want to start from the beginning...although there is good reason for that too.
*
* Getting this data is done by expressing interests in the meta data. The producer of the
* media stream will catch this through one of its ccnx filters and produce this meta data
* back through the network to us.
*
* \param h ccnx context handle
* \param name the content name for which we desire the meta data
* \param timeout how long to wait around
* \return the segment number to ask for first, 0 on timeout
*/
static uintmax_t *
get_segment (struct ccn *h, struct ccn_charbuf *name, int timeout)
{
struct ccn_charbuf *hn;
uintmax_t *result = NULL;
int res = 0;
GST_INFO ("get_segment step 1");
hn = ccn_charbuf_create ();
// ccn_name_append_components(hn, name->buf, 0, name->length );
ccn_charbuf_append_charbuf (hn, name);
ccn_name_from_uri (hn, "_meta_/.segment");
// ccn_name_append_str(hn, "_meta_");
// ccn_name_append_str(hn, ".segment");
GST_INFO ("get_segment step 2");
// res = ccn_resolve_version(h, hn, CCN_V_HIGHEST, timeout);
GST_INFO ("get_segment step 3, res: %d", res);
if (res == 0) {
struct ccn_charbuf *ho = ccn_charbuf_create ();
struct ccn_parsed_ContentObject pcobuf = { 0 };
const unsigned char *hc;
size_t hcs;
// hDump(DUMP_ADDR(hn->buf), DUMP_SIZE(hn->length));
GST_INFO ("get_segment step 10");
res = ccn_get (h, hn, NULL, timeout, ho, &pcobuf, NULL, 0);
GST_INFO ("get_segment step 11, res: %d", res);
if (res >= 0) {
hc = ho->buf;
hcs = ho->length;
// hDump( DUMP_ADDR(hc), DUMP_SIZE(hcs));
ccn_content_get_value (hc, hcs, &pcobuf, &hc, &hcs);
// hDump( DUMP_ADDR(hc), DUMP_SIZE(hcs));
result = calloc (1, sizeof (uintmax_t));
memcpy (result, hc, sizeof (uintmax_t));
}
ccn_charbuf_destroy (&ho);
}
GST_INFO ("get_segment step 9");
ccn_charbuf_destroy (&hn);
return (result);
}
/**
* Read a slice (from a repository) given the name.
* @param h is the ccn_handle on which to read.
* @param name is the charbuf containing the name of the sync slice to be read.
* @param slice is a pointer to a ccns_slice object which will be filled in
* on successful return.
* @returns 0 on success, -1 otherwise.
*/
int
ccns_read_slice(struct ccn *h, struct ccn_charbuf *name,
struct ccns_slice *slice) {
struct ccn_parsed_ContentObject pco_space = { 0 };
struct ccn_parsed_ContentObject *pco = &pco_space;
struct ccn_charbuf *nc = ccn_charbuf_create_n(name->length);
struct ccn_charbuf *cob = ccn_charbuf_create();
const unsigned char *content;
size_t content_length;
int res = -1;
if (nc == NULL || cob == NULL)
goto Cleanup;
ccn_charbuf_append_charbuf(nc, name);
res = ccn_resolve_version(h, nc, CCN_V_HIGHEST, 100); // XXX: timeout
if (res < 0)
goto Cleanup;
if (res == 0) {
// TODO: check if the last component is a segment number, chop it off, try again.
}
res = ccn_get(h, nc, NULL, 100, cob, pco, NULL, 0);
if (res < 0)
goto Cleanup;
if (pco->type != CCN_CONTENT_DATA) {
res = -1;
goto Cleanup;
}
res = ccn_content_get_value(cob->buf, cob->length, pco,
&content, &content_length);
if (res < 0)
goto Cleanup;
res = slice_parse(slice, content, content_length);
Cleanup:
ccn_charbuf_destroy(&nc);
ccn_charbuf_destroy(&cob);
return (res);
}
static PyObject *
Content_from_ccn_parsed(struct ccn_charbuf *content_object,
struct ccn_parsed_ContentObject *parsed_content_object)
{
const char *value;
size_t size;
PyObject *py_content;
int r;
r = ccn_content_get_value(content_object->buf, content_object->length,
parsed_content_object, (const unsigned char **) &value, &size);
if (r < 0) {
PyErr_Format(g_PyExc_CCNError, "ccn_content_get_value() returned"
" %d", r);
return NULL;
}
py_content = PyBytes_FromStringAndSize(value, size);
if (!py_content)
return NULL;
return py_content;
}
enum ccn_upcall_res CcnLAC_fetchFaceidCb(struct ccn_closure* selfp, enum ccn_upcall_kind kind, struct ccn_upcall_info* info) {
CcnLAC self = (CcnLAC)selfp->data;
switch (kind) {
case CCN_UPCALL_FINAL: {
free(selfp);
return CCN_UPCALL_RESULT_OK;
}
case CCN_UPCALL_INTEREST_TIMED_OUT: {
return CCN_UPCALL_RESULT_REEXPRESS;
}
case CCN_UPCALL_CONTENT_UNVERIFIED:
case CCN_UPCALL_CONTENT_KEYMISSING:
case CCN_UPCALL_CONTENT_RAW:
case CCN_UPCALL_CONTENT: {
struct ccn_forwarding_entry* fe = NULL;
const unsigned char* fe_ccnb = NULL;
size_t fe_ccnb_size = 0;
int res = ccn_content_get_value(info->content_ccnb, info->pco->offset[CCN_PCO_E], info->pco, &fe_ccnb, &fe_ccnb_size);
if (res == 0) fe = ccn_forwarding_entry_parse(fe_ccnb, fe_ccnb_size);
if (fe != NULL) {
self->faceid = fe->faceid;
ccn_forwarding_entry_destroy(&fe);
} else {
self->error = true;
}
PollMgr_detach(self->pm, ccn_get_connection_fd(self->ccnh), &CcnLAC_initPollCb, self);
void* emptyPDU = malloc(CCN_EMPTY_PDU_LENGTH);
memcpy(emptyPDU, CCN_EMPTY_PDU, CCN_EMPTY_PDU_LENGTH);
NBS_write(self->nbs, emptyPDU, 0, CCN_EMPTY_PDU_LENGTH, NULL);
NBS_pollAttach(self->nbs, self->pm);
return CCN_UPCALL_RESULT_OK;
}
default: {
return CCN_UPCALL_RESULT_ERR;
}
}
}
// creates a full structure without action, if proto == "face" only the
// faceid (from cmd_host parameter) and lifetime will be filled in.
struct ccn_face_instance *
parse_ccn_face_instance(struct ccndc_data *self,
const char *cmd_proto,
const char *cmd_host, const char *cmd_port,
const char *cmd_mcastttl, const char *cmd_mcastif,
int freshness)
{
struct ccn_face_instance *entry;
struct addrinfo hints = {.ai_family = AF_UNSPEC, .ai_flags = (AI_ADDRCONFIG)};
struct addrinfo mcasthints = {.ai_family = AF_UNSPEC, .ai_flags = (AI_ADDRCONFIG | AI_NUMERICHOST)};
struct addrinfo *raddrinfo = NULL;
struct addrinfo *mcastifaddrinfo = NULL;
char rhostnamebuf [NI_MAXHOST];
char rhostportbuf [NI_MAXSERV];
int off_address = -1, off_port = -1, off_source_address = -1;
int res;
int socktype;
entry = calloc(1, sizeof(*entry));
if (entry == NULL) {
ccndc_warn(__LINE__, "Fatal error: memory allocation failed");
goto ExitOnError;
}
// allocate storage for Face data
entry->store = ccn_charbuf_create();
if (entry->store == NULL) {
ccndc_warn(__LINE__, "Fatal error: memory allocation failed");
goto ExitOnError;
}
// copy static info
entry->ccnd_id = (const unsigned char *)self->ccnd_id;
entry->ccnd_id_size = self->ccnd_id_size;
if (cmd_proto == NULL) {
ccndc_warn(__LINE__, "command error, missing address type\n");
goto ExitOnError;
}
if (strcasecmp(cmd_proto, "udp") == 0) {
entry->descr.ipproto = IPPROTO_UDP;
socktype = SOCK_DGRAM;
} else if (strcasecmp(cmd_proto, "tcp") == 0) {
entry->descr.ipproto = IPPROTO_TCP;
socktype = SOCK_STREAM;
} else if (strcasecmp(cmd_proto, "face") == 0) {
errno = 0;
unsigned long faceid = strtoul(cmd_host, (char **)NULL, 10);
if (errno == ERANGE || errno == EINVAL || faceid > UINT_MAX || faceid == 0) {
ccndc_warn(__LINE__, "command error, face number invalid or out of range '%s'\n", cmd_host);
goto ExitOnError;
}
entry->faceid = (unsigned) faceid;
entry->lifetime = freshness;
return (entry);
} else {
ccndc_warn(__LINE__, "command error, unrecognized address type '%s'\n", cmd_proto);
goto ExitOnError;
}
if (cmd_host == NULL) {
ccndc_warn(__LINE__, "command error, missing hostname\n");
goto ExitOnError;
}
if (cmd_port == NULL || cmd_port[0] == 0)
cmd_port = CCN_DEFAULT_UNICAST_PORT;
hints.ai_socktype = socktype;
res = getaddrinfo(cmd_host, cmd_port, &hints, &raddrinfo);
if (res != 0 || raddrinfo == NULL) {
ccndc_warn(__LINE__, "command error, getaddrinfo for host [%s] port [%s]: %s\n", cmd_host, cmd_port, gai_strerror(res));
goto ExitOnError;
}
res = getnameinfo(raddrinfo->ai_addr, raddrinfo->ai_addrlen,
rhostnamebuf, sizeof(rhostnamebuf),
rhostportbuf, sizeof(rhostportbuf),
NI_NUMERICHOST | NI_NUMERICSERV);
freeaddrinfo(raddrinfo);
if (res != 0) {
ccndc_warn(__LINE__, "command error, getnameinfo: %s\n", gai_strerror(res));
goto ExitOnError;
}
off_address = entry->store->length;
res = ccn_charbuf_append(entry->store, rhostnamebuf, strlen(rhostnamebuf)+1);
if (res != 0) {
ccndc_warn(__LINE__, "Cannot append to charbuf");
goto ExitOnError;
}
off_port = entry->store->length;
res = ccn_charbuf_append(entry->store, rhostportbuf, strlen(rhostportbuf)+1);
if (res != 0) {
ccndc_warn(__LINE__, "Cannot append to charbuf");
goto ExitOnError;
}
entry->descr.mcast_ttl = -1;
if (cmd_mcastttl != NULL) {
char *endptr;
entry->descr.mcast_ttl = strtol(cmd_mcastttl, &endptr, 10);
if ((endptr != &cmd_mcastttl[strlen(cmd_mcastttl)]) ||
entry->descr.mcast_ttl < 0 || entry->descr.mcast_ttl > 255) {
ccndc_warn(__LINE__, "command error, invalid multicast ttl: %s\n", cmd_mcastttl);
goto ExitOnError;
}
}
if (cmd_mcastif != NULL) {
res = getaddrinfo(cmd_mcastif, NULL, &mcasthints, &mcastifaddrinfo);
if (res != 0) {
ccndc_warn(__LINE__, "command error, incorrect multicat interface [%s]: "
"mcastifaddr getaddrinfo: %s\n", cmd_mcastif, gai_strerror(res));
goto ExitOnError;
}
res = getnameinfo(mcastifaddrinfo->ai_addr, mcastifaddrinfo->ai_addrlen,
rhostnamebuf, sizeof(rhostnamebuf),
NULL, 0,
NI_NUMERICHOST | NI_NUMERICSERV);
freeaddrinfo(mcastifaddrinfo);
if (res != 0) {
ccndc_warn(__LINE__, "command error, getnameinfo: %s\n", gai_strerror(res));
goto ExitOnError;
}
off_source_address = entry->store->length;
res = ccn_charbuf_append(entry->store, rhostnamebuf, strlen(rhostnamebuf)+1);
if (res != 0) {
ccndc_warn(__LINE__, "Cannot append to charbuf");
goto ExitOnError;
}
}
entry->descr.address = (const char *)(entry->store->buf + off_address);
entry->descr.port = (const char *)(entry->store->buf + off_port);
if (off_source_address >= 0) {
entry->descr.source_address = (const char *)(entry->store->buf + off_source_address);
}
entry->lifetime = freshness;
return entry;
ExitOnError:
ccn_face_instance_destroy(&entry);
return (NULL);
}
struct ccn_face_instance *
parse_ccn_face_instance_from_face(struct ccndc_data *self,
const char *cmd_faceid)
{
struct ccn_face_instance *entry = calloc(1, sizeof(*entry));
// allocate storage for Face data
entry->store = ccn_charbuf_create();
// copy static info
entry->ccnd_id = (const unsigned char *)self->ccnd_id;
entry->ccnd_id_size = self->ccnd_id_size;
/* destroy a face - the URI field will hold the face number */
if (cmd_faceid == NULL) {
ccndc_warn(__LINE__, "command error, missing face number for destroyface\n");
goto ExitOnError;
}
char *endptr;
int facenumber = strtol(cmd_faceid, &endptr, 10);
if ((endptr != &cmd_faceid[strlen(cmd_faceid)]) ||
facenumber < 0) {
ccndc_warn(__LINE__, "command error invalid face number for destroyface: %d\n", facenumber);
goto ExitOnError;
}
entry->faceid = facenumber;
return entry;
ExitOnError:
ccn_face_instance_destroy(&entry);
return (NULL);
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// "private section
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
int
ccndc_get_ccnd_id(struct ccndc_data *self)
{
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *resultbuf = NULL;
struct ccn_parsed_ContentObject pcobuf = {0};
char ccndid_uri[] = "ccnx:/%C1.M.S.localhost/%C1.M.SRV/ccnd/KEY";
const unsigned char *ccndid_result;
int res = 0;
name = ccn_charbuf_create();
if (name == NULL) {
ccndc_warn(__LINE__, "Unable to allocate storage for service locator name charbuf\n");
return -1;
}
resultbuf = ccn_charbuf_create();
if (resultbuf == NULL) {
ccndc_warn(__LINE__, "Unable to allocate storage for result charbuf");
res = -1;
goto Cleanup;
}
res = ccn_name_from_uri(name, ccndid_uri);
if (res < 0) {
ccndc_warn(__LINE__, "Unable to parse service locator URI for ccnd key");
goto Cleanup;
}
res = ccn_get(self->ccn_handle,
name,
self->local_scope_template,
4500, resultbuf, &pcobuf, NULL, 0);
if (res < 0) {
ccndc_warn(__LINE__, "Unable to get key from ccnd");
goto Cleanup;
}
res = ccn_ref_tagged_BLOB (CCN_DTAG_PublisherPublicKeyDigest,
resultbuf->buf,
pcobuf.offset[CCN_PCO_B_PublisherPublicKeyDigest],
pcobuf.offset[CCN_PCO_E_PublisherPublicKeyDigest],
&ccndid_result, &self->ccnd_id_size);
if (res < 0) {
ccndc_warn(__LINE__, "Unable to parse ccnd response for ccnd id");
goto Cleanup;
}
if (self->ccnd_id_size > sizeof (self->ccnd_id))
{
ccndc_warn(__LINE__, "Incorrect size for ccnd id in response");
goto Cleanup;
}
memcpy(self->ccnd_id, ccndid_result, self->ccnd_id_size);
Cleanup:
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&resultbuf);
return (res);
}
struct ccn_face_instance *
ccndc_do_face_action(struct ccndc_data *self,
const char *action,
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;
face_instance->action = action;
/* Encode the given face instance */
newface = ccn_charbuf_create();
ON_NULL_CLEANUP(newface);
ON_ERROR_CLEANUP(ccnb_append_face_instance(newface, face_instance));
temp = ccn_charbuf_create();
ON_NULL_CLEANUP(temp);
res = ccn_sign_content(self->ccn_handle, temp, self->no_name, NULL, newface->buf, newface->length);
ON_ERROR_CLEANUP(res);
resultbuf = ccn_charbuf_create();
ON_NULL_CLEANUP(resultbuf);
/* Construct the Interest name that will create the face */
name = ccn_charbuf_create();
ON_NULL_CLEANUP(name);
ON_ERROR_CLEANUP(ccn_name_init(name));
ON_ERROR_CLEANUP(ccn_name_append_str(name, "ccnx"));
ON_ERROR_CLEANUP(ccn_name_append(name, face_instance->ccnd_id, face_instance->ccnd_id_size));
ON_ERROR_CLEANUP(ccn_name_append_str(name, face_instance->action));
ON_ERROR_CLEANUP(ccn_name_append(name, temp->buf, temp->length));
res = ccn_get(self->ccn_handle, name, self->local_scope_template, 1000, resultbuf, &pcobuf, NULL, 0);
ON_ERROR_CLEANUP(res);
ON_ERROR_CLEANUP(ccn_content_get_value(resultbuf->buf, resultbuf->length, &pcobuf, &ptr, &length));
new_face_instance = ccn_face_instance_parse(ptr, length);
ON_NULL_CLEANUP(new_face_instance);
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);
ccn_face_instance_destroy(&new_face_instance);
return (NULL);
}
int
ccndc_do_prefix_action(struct ccndc_data *self,
const char *action,
struct ccn_forwarding_entry *forwarding_entry)
{
struct ccn_charbuf *temp = NULL;
struct ccn_charbuf *resultbuf = NULL;
struct ccn_charbuf *signed_info = NULL;
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *prefixreg = NULL;
struct ccn_parsed_ContentObject pcobuf = {0};
struct ccn_forwarding_entry *new_forwarding_entry = NULL;
const unsigned char *ptr = NULL;
size_t length = 0;
int res;
forwarding_entry->action = action;
prefixreg = ccn_charbuf_create();
ON_NULL_CLEANUP(prefixreg);
ON_ERROR_CLEANUP(ccnb_append_forwarding_entry(prefixreg, forwarding_entry));
temp = ccn_charbuf_create();
ON_NULL_CLEANUP(temp);
res = ccn_sign_content(self->ccn_handle, temp, self->no_name, NULL, prefixreg->buf, prefixreg->length);
ON_ERROR_CLEANUP(res);
resultbuf = ccn_charbuf_create();
ON_NULL_CLEANUP(resultbuf);
name = ccn_charbuf_create();
ON_ERROR_CLEANUP(ccn_name_init(name));
ON_ERROR_CLEANUP(ccn_name_append_str(name, "ccnx"));
ON_ERROR_CLEANUP(ccn_name_append(name, forwarding_entry->ccnd_id, forwarding_entry->ccnd_id_size));
ON_ERROR_CLEANUP(ccn_name_append_str(name, forwarding_entry->action));
ON_ERROR_CLEANUP(ccn_name_append(name, temp->buf, temp->length));
res = ccn_get(self->ccn_handle, name, self->local_scope_template, 1000, resultbuf, &pcobuf, NULL, 0);
ON_ERROR_CLEANUP(res);
ON_ERROR_CLEANUP(ccn_content_get_value(resultbuf->buf, resultbuf->length, &pcobuf, &ptr, &length));
new_forwarding_entry = ccn_forwarding_entry_parse(ptr, length);
ON_NULL_CLEANUP(new_forwarding_entry);
res = new_forwarding_entry->faceid;
ccn_forwarding_entry_destroy(&new_forwarding_entry);
ccn_charbuf_destroy(&signed_info);
ccn_charbuf_destroy(&temp);
ccn_charbuf_destroy(&resultbuf);
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&prefixreg);
return (res);
/* This is where ON_ERROR_CLEANUP sends us in case of an error
* and we must free any storage we allocated before returning.
*/
Cleanup:
ccn_charbuf_destroy(&signed_info);
ccn_charbuf_destroy(&temp);
ccn_charbuf_destroy(&resultbuf);
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&prefixreg);
return (-1);
}
/**
*
* Bind a prefix to a face
*
*/
static int
register_unregister_prefix(struct ccn *h, struct ccn_charbuf *local_scope_template,
struct ccn_charbuf *no_name, struct ccn_charbuf *name_prefix,
struct ccn_face_instance *face_instance, int operation)
{
struct ccn_charbuf *temp = NULL;
struct ccn_charbuf *resultbuf = NULL;
struct ccn_charbuf *signed_info = NULL;
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *prefixreg = NULL;
struct ccn_parsed_ContentObject pcobuf = {0};
struct ccn_forwarding_entry forwarding_entry_storage = {0};
struct ccn_forwarding_entry *forwarding_entry = &forwarding_entry_storage;
struct ccn_forwarding_entry *new_forwarding_entry;
const unsigned char *ptr = NULL;
size_t length = 0;
int res;
/* Register or unregister the prefix */
forwarding_entry->action = (operation == OP_REG) ? "prefixreg" : "unreg";
forwarding_entry->name_prefix = name_prefix;
forwarding_entry->ccnd_id = face_instance->ccnd_id;
forwarding_entry->ccnd_id_size = face_instance->ccnd_id_size;
forwarding_entry->faceid = face_instance->faceid;
forwarding_entry->flags = -1;
forwarding_entry->lifetime = 2100;
prefixreg = ccn_charbuf_create();
ccnb_append_forwarding_entry(prefixreg, forwarding_entry);
temp = ccn_charbuf_create();
res = ccn_sign_content(h, temp, no_name, NULL, prefixreg->buf, prefixreg->length);
resultbuf = ccn_charbuf_create();
/* construct Interest containing prefixreg request */
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, (operation == OP_REG) ? "prefixreg" : "unreg");
ccn_name_append(name, temp->buf, temp->length);
/* send Interest, get Data */
res = ccn_get(h, name, local_scope_template, 1000, resultbuf, &pcobuf, NULL, 0);
ON_ERROR_CLEANUP(res);
res = ccn_content_get_value(resultbuf->buf, resultbuf->length, &pcobuf, &ptr, &length);
ON_ERROR_CLEANUP(res);
/* extract new forwarding entry from Data */
new_forwarding_entry = ccn_forwarding_entry_parse(ptr, length);
ON_NULL_CLEANUP(new_forwarding_entry);
res = new_forwarding_entry->faceid;
ccn_forwarding_entry_destroy(&new_forwarding_entry);
ccn_charbuf_destroy(&signed_info);
ccn_charbuf_destroy(&temp);
ccn_charbuf_destroy(&resultbuf);
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&prefixreg);
return res;
cleanup:
ccn_forwarding_entry_destroy(&new_forwarding_entry);
ccn_charbuf_destroy(&signed_info);
ccn_charbuf_destroy(&temp);
ccn_charbuf_destroy(&resultbuf);
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&prefixreg);
return -1;
}
/**
* Main working loop for stuff coming in from the CCNx network
*
* The only kind of content we work with are data messages. They are in response to the
* interest messages we send out. The work involves 2 pieces: packing the data from ccn message
* sizes into buffer sizes we use internally, and detecting when the stream of data is done.
*
* The first is fairly simple. Each internal buffer we 'fill' is placed onto the fifo queue
* so the main thread can take it off and reply to the pipeline request for more data.
*
* Determining the end of stream at the moment is a bit of a hack and could use some work.
* \todo volunteers? 8-)
*
* \param selfp -> a context structure we created when registering this call-back
* \param kind specifies the type of call-back being processed, see the \b switch statement
* \param info context information about the call-back itself; interests, data, etc.
* \return a response as to how successful we were in processing the call-back
* \retval CCN_UPCALL_RESULT_OK things went well
* \retval CCN_UPCALL_RESULT_VERIFY need to verify the contents of what we received
* \retval CCN_UPCALL_RESULT_REEXPRESS an interest timedout waiting for data, so we try again
* \retval CCN_UPCALL_RESULT_ERR some error was encountered
*/
static enum ccn_upcall_res
incoming_content (struct ccn_closure *selfp,
enum ccn_upcall_kind kind, struct ccn_upcall_info *info)
{
Gstccnxsrc *me = GST_CCNXSRC (selfp->data);
const unsigned char *ccnb = NULL;
size_t ccnb_size = 0;
const unsigned char *ib = NULL; /* info->interest_ccnb */
struct ccn_indexbuf *ic = NULL;
unsigned int i;
uintmax_t segment;
CcnxInterestState *istate = NULL;
gint res;
const unsigned char *cp;
size_t sz;
const unsigned char *data = NULL;
size_t data_size = 0;
gboolean b_last = FALSE;
GST_INFO ("content has arrived!");
/* Do some basic sanity and type checks to see if we want to process this data */
if (CCN_UPCALL_FINAL == kind) {
GST_LOG_OBJECT (me, "CCN upcall final %p", selfp);
if (me->i_bufoffset > 0) {
GST_BUFFER_SIZE (me->buf) = me->i_bufoffset;
fifo_put (me, me->buf);
me->buf = gst_buffer_new_and_alloc (CCN_FIFO_BLOCK_SIZE);
me->i_bufoffset = 0;
}
/*
* Should emit an eos here instead of the empty buffer
*/
GST_BUFFER_SIZE (me->buf) = 0;
fifo_put (me, me->buf);
me->i_bufoffset = 0;
return (CCN_UPCALL_RESULT_OK);
}
if (!info)
return CCN_UPCALL_RESULT_ERR; // Now why would this happen?
// show_comps( info->content_ccnb, info->content_comps);
if (CCN_UPCALL_INTEREST_TIMED_OUT == kind) {
if (selfp != me->ccn_closure) {
GST_LOG_OBJECT (me, "CCN Interest timed out on dead closure %p", selfp);
return (CCN_UPCALL_RESULT_OK);
}
segment =
ccn_ccnb_fetch_segment (info->interest_ccnb, info->interest_comps);
GST_INFO ("...looks to be for segment: %d", segment);
GST_LOG_OBJECT (me, "CCN upcall reexpress -- timed out");
istate = fetchSegmentInterest (me, segment);
if (istate) {
if (istate->timeouts > 5) {
GST_LOG_OBJECT (me, "CCN upcall reexpress -- too many reexpressions");
if (segment == me->post_seg) // We have been waiting for this one...process as an empty block to trigger other activity
process_or_queue (me, me->post_seg, NULL, 0, FALSE);
else
freeInterestState (me, istate);
post_next_interest (me); // make sure to ask for new stuff if needed, or else we stall waiting for nothing
return (CCN_UPCALL_RESULT_OK);
} else {
istate->timeouts++;
return (CCN_UPCALL_RESULT_REEXPRESS);
}
} else {
GST_LOG_OBJECT (me, "segment not found in cache: %d", segment);
return (CCN_UPCALL_RESULT_OK);
}
} else if (CCN_UPCALL_CONTENT_UNVERIFIED == kind) {
if (selfp != me->ccn_closure) {
GST_LOG_OBJECT (me, "CCN unverified content on dead closure %p", selfp);
return (CCN_UPCALL_RESULT_OK);
}
return (CCN_UPCALL_RESULT_VERIFY);
} else if (CCN_UPCALL_CONTENT != kind) {
GST_LOG_OBJECT (me, "CCN upcall result error");
return (CCN_UPCALL_RESULT_ERR);
}
segment = ccn_ccnb_fetch_segment (info->content_ccnb, info->content_comps);
GST_INFO ("...looks to be for segment: %d", segment);
if (selfp != me->ccn_closure) {
GST_LOG_OBJECT (me, "CCN content on dead closure %p", selfp);
return (CCN_UPCALL_RESULT_OK);
}
/* At this point it seems we have a data message we want to process */
ccnb = info->content_ccnb;
ccnb_size = info->pco->offset[CCN_PCO_E];
/* spit out some debug information */
for (i = 0; i < 5; ++i) {
GST_DEBUG ("%3d: ", i);
if (0 > ccn_name_comp_get (info->content_ccnb, info->content_comps, i, &cp,
&sz)) {
// fprintf(stderr, "could not get comp\n");
} else {
// hDump( DUMP_ADDR( cp ), DUMP_SIZE( sz ) );
}
}
/* go get the data and process it...note that the data pointer here is only temporary, a copy is needed to keep the data */
ib = info->interest_ccnb;
ic = info->interest_comps;
res = ccn_content_get_value (ccnb, ccnb_size, info->pco, &data, &data_size);
if (res < 0) {
GST_LOG_OBJECT (me, "CCN error on get value of size");
process_or_queue (me, segment, NULL, 0, FALSE); // process null block to adjust interest array queue
post_next_interest (me); // Keep the data flowing
return (CCN_UPCALL_RESULT_ERR);
}
/* was this the last block? [code taken from a ccnx tool */
/* \todo the test below should get refactored into the library */
if (info->pco->offset[CCN_PCO_B_FinalBlockID] !=
info->pco->offset[CCN_PCO_E_FinalBlockID]) {
const unsigned char *finalid = NULL;
size_t finalid_size = 0;
const unsigned char *nameid = NULL;
size_t nameid_size = 0;
struct ccn_indexbuf *cc = info->content_comps;
ccn_ref_tagged_BLOB (CCN_DTAG_FinalBlockID, ccnb,
info->pco->offset[CCN_PCO_B_FinalBlockID],
info->pco->offset[CCN_PCO_E_FinalBlockID], &finalid, &finalid_size);
if (cc->n < 2)
abort (); // \todo we need to behave better than this
ccn_ref_tagged_BLOB (CCN_DTAG_Component, ccnb,
cc->buf[cc->n - 2], cc->buf[cc->n - 1], &nameid, &nameid_size);
if (finalid_size == nameid_size
&& 0 == memcmp (finalid, nameid, nameid_size)) {
b_last = TRUE;
}
}
/* a short block can also indicate the end, if the client isn't using FinalBlockID */
if (data_size < CCN_CHUNK_SIZE)
b_last = TRUE;
/* something to process */
process_or_queue (me, segment, data, data_size, b_last);
post_next_interest (me);
if (!b_last)
return post_next_interest (me);
return (CCN_UPCALL_RESULT_OK);
}
enum ccn_upcall_res
incoming_content(
struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info)
{
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *templ = NULL;
struct ccn_charbuf *temp = NULL;
const unsigned char *ccnb = NULL;
size_t ccnb_size = 0;
const unsigned char *data = NULL;
size_t data_size = 0;
size_t written;
const unsigned char *ib = NULL; /* info->interest_ccnb */
struct ccn_indexbuf *ic = NULL;
int res;
struct mydata *md = selfp->data;
if (kind == CCN_UPCALL_FINAL) {
if (md != NULL) {
selfp->data = NULL;
free(md);
md = NULL;
}
return(CCN_UPCALL_RESULT_OK);
}
if (kind == CCN_UPCALL_INTEREST_TIMED_OUT)
return(CCN_UPCALL_RESULT_REEXPRESS);
if (kind != CCN_UPCALL_CONTENT && kind != CCN_UPCALL_CONTENT_UNVERIFIED)
return(CCN_UPCALL_RESULT_ERR);
if (md == NULL)
selfp->data = md = calloc(1, sizeof(*md));
ccnb = info->content_ccnb;
ccnb_size = info->pco->offset[CCN_PCO_E];
ib = info->interest_ccnb;
ic = info->interest_comps;
/* XXX - must verify sig, and make sure it is LEAF content */
res = ccn_content_get_value(ccnb, ccnb_size, info->pco, &data, &data_size);
if (res < 0) abort();
if (data_size > CHUNK_SIZE) {
/* For us this is spam. Give up now. */
fprintf(stderr, "*** Segment %d found with a data size of %d."
" This program only works with segments of 1024 bytes."
" Try ccncatchunks2 instead.\n",
(int)selfp->intdata, (int)data_size);
exit(1);
}
/* OK, we will accept this block. */
written = fwrite(data, data_size, 1, stdout);
if (written != 1)
exit(1);
/* A short block signals EOF for us. */
if (data_size < CHUNK_SIZE)
exit(0);
/* Ask for the next one */
name = ccn_charbuf_create();
ccn_name_init(name);
if (ic->n < 2) abort();
res = ccn_name_append_components(name, ib, ic->buf[0], ic->buf[ic->n - 2]);
if (res < 0) abort();
temp = ccn_charbuf_create();
ccn_charbuf_putf(temp, "%d", ++(selfp->intdata));
ccn_name_append(name, temp->buf, temp->length);
ccn_charbuf_destroy(&temp);
templ = make_template(md, info);
res = ccn_express_interest(info->h, name, selfp, templ);
if (res < 0) abort();
ccn_charbuf_destroy(&templ);
ccn_charbuf_destroy(&name);
return(CCN_UPCALL_RESULT_OK);
}
static enum ccn_upcall_res
CallMe(struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info) {
// CallMe is the callback routine invoked by ccn_run when a registered
// interest has something interesting happen.
struct localClosure *req = (struct localClosure *)selfp->data;
seg_t thisSeg = req->reqSeg;
struct ccn_fetch_stream *fs = (struct ccn_fetch_stream *) req->fs;
if (fs == NULL) {
if (kind == CCN_UPCALL_FINAL) {
// orphaned, so just get rid of it
free(req);
free(selfp);
}
return(CCN_UPCALL_RESULT_OK);
}
FILE *debug = fs->parent->debug;
seg_t finalSeg = fs->finalSeg;
ccn_fetch_flags flags = fs->parent->debugFlags;
if (finalSeg < 0) {
// worth a try to find the last segment
finalSeg = GetFinalSegment(info);
fs->finalSeg = finalSeg;
}
switch (kind) {
case CCN_UPCALL_FINAL:
// this is the cleanup for an expressed interest
req = RemSegRequest(fs, req);
if (fs->reqBusy > 0) fs->reqBusy--;
free(selfp);
return(CCN_UPCALL_RESULT_OK);
case CCN_UPCALL_INTEREST_TIMED_OUT: {
if (finalSeg >= 0 && thisSeg > finalSeg)
// ignore this timeout quickly
return(CCN_UPCALL_RESULT_OK);
intmax_t dt = DeltaTime(req->startClock, GetCurrentTimeUSecs());
if (dt >= fs->timeoutUSecs) {
// timed out, too many retries
// assume that this interest will never produce
seg_t timeoutSeg = fs->timeoutSeg;
fs->timeoutsSeen++;
fs->segsAhead = 0;
if (timeoutSeg < 0 || thisSeg < timeoutSeg) {
// we can infer a new timeoutSeg
fs->timeoutSeg = thisSeg;
}
if (debug != NULL && (flags & ccn_fetch_flags_NoteTimeout)) {
fprintf(debug,
"** ccn_fetch timeout, %s, seg %jd",
fs->id, thisSeg);
fprintf(debug,
", dt %jd us, timeoutUSecs %jd\n",
dt, fs->timeoutUSecs);
fflush(debug);
}
return(CCN_UPCALL_RESULT_OK);
}
// TBD: may need to reseed bloom filter? who to ask?
return(CCN_UPCALL_RESULT_REEXPRESS);
}
case CCN_UPCALL_CONTENT_UNVERIFIED:
return (CCN_UPCALL_RESULT_VERIFY);
case CCN_UPCALL_CONTENT:
if (fs->timeoutSeg >= 0 && fs->timeoutSeg <= thisSeg)
// we will ignore this, since we are blocked
return(CCN_UPCALL_RESULT_OK);
break;
default:
// SHOULD NOT HAPPEN
return(CCN_UPCALL_RESULT_ERR);
}
struct ccn_fetch_buffer *fb = FindBufferForSeg(fs, thisSeg);
if (fb == NULL) {
// we don't already have the data yet
const unsigned char *data = NULL;
size_t dataLen = 0;
size_t ccnb_size = info->pco->offset[CCN_PCO_E];
const unsigned char *ccnb = info->content_ccnb;
int res = ccn_content_get_value(ccnb, ccnb_size, info->pco,
&data, &dataLen);
if (res < 0 || (thisSeg != finalSeg && dataLen == 0)) {
// we got a bogus result, no data in this content!
if (debug != NULL && (flags & ccn_fetch_flags_NoteAddRem)) {
fprintf(debug,
"-- ccn_fetch no data, %s, seg %jd, final %jd",
fs->id, thisSeg, finalSeg);
ShowDelta(debug, req->startClock);
}
if (fs->zeroLenSeg < 0 || thisSeg < fs->zeroLenSeg)
// note this problem for future reporting
fs->zeroLenSeg = thisSeg;
} else if (thisSeg == finalSeg && dataLen == 0) {
// EOF, but no buffer needed
if (fs->fileSize < 0)
fs->fileSize = InferPosition(fs, thisSeg);
fs->finalSeg = finalSeg-1;
if (debug != NULL && (flags & ccn_fetch_flags_NoteFinal)) {
fprintf(debug,
"-- ccn_fetch EOF, %s, seg %jd, len %d, fs %jd",
fs->id, thisSeg,
(int) dataLen,
fs->fileSize);
ShowDelta(debug, req->startClock);
}
} else {
// alloc a buffer and transfer the data
if (fs->segSize == 0) {
// assuming fixed size segments, so any should do
// EXCEPT for an incomplete final segment
if (thisSeg == 0 || thisSeg < finalSeg)
fs->segSize = dataLen;
}
if (thisSeg == finalSeg) fs->finalSegLen = dataLen;
struct ccn_fetch_buffer *fb = NewBufferForSeg(fs, thisSeg, dataLen);
memcpy(fb->buf, data, dataLen);
if (debug != NULL && (flags & ccn_fetch_flags_NoteFill)) {
fprintf(debug,
"-- ccn_fetch FillSeg, %s, seg %jd, len %d, nbuf %d",
fs->id, thisSeg, (int) dataLen, (int) fs->nBufs);
ShowDelta(debug, req->startClock);
}
if (thisSeg == finalSeg) {
// the file size is known in segments
if (fs->segSize <= 0) {
// variable or unknown segment size
if (fb->pos >= 0) {
fs->fileSize = fb->pos + dataLen;
}
} else {
// fixed segment size, so file size is now known
fs->fileSize = thisSeg * fs->segSize + dataLen;
}
if (debug != NULL && (flags & ccn_fetch_flags_NoteFinal)) {
fprintf(debug,
"-- ccn_fetch EOF, %s, seg %jd, len %d, fs %jd",
fs->id, thisSeg, (int) dataLen, fs->fileSize);
ShowDelta(debug, req->startClock);
}
}
fs->segsRead++;
}
}
ccn_set_run_timeout(fs->parent->h, 0);
return(CCN_UPCALL_RESULT_OK);
}
int main (int argc, char **argv) {
int res;
//check if user supplied uri to trace
if(argv[1] == NULL) {
printf("Usage: trace URI\n");
exit(1);
}
//get the length of user provided URI
int argv_length = strlen(argv[1]);
//check first six chars for ccnx:/, if present, skip them
int skip = 0;
res = strncmp("ccnx:/", argv[1], 6);
if(res == 0) {
skip = 5;
}
//if URI does not begins with /, exit
if (argv[1][skip] != '/') {
printf("URI must begin with /\n");
exit(1);
}
//check if uri ends with slash, append if missing
char *slash = "";
if (argv[1][argv_length-1] != '/') {
slash = "/";
}
//allocate memory for trace URI = /trace/user_input/random_number
char *URI = (char *) malloc(sizeof(char)* argv_length+1); //find size of rand
if(URI == NULL) {
fprintf(stderr, "Can not allocate memory for URI\n");
exit(1);
}
//put together the trace URI, add a random number to end of URI
srand ((unsigned int)time (NULL)*getpid());
sprintf(URI, "%s%s", argv[1]+skip, slash);
//allocate memory for interest
struct ccn_charbuf *ccnb = ccn_charbuf_create();
if(ccnb == NULL) {
fprintf(stderr, "Can not allocate memory for interest\n");
exit(1);
}
//adding name to interest
res = ccn_name_from_uri(ccnb, URI);
if(res == -1) {
fprintf(stderr, "Failed to assign name to interest");
exit(1);
}
//create the ccn handle
struct ccn *ccn = ccn_create();
if(ccn == NULL) {
fprintf(stderr, "Can not create ccn handle\n");
exit(1);
}
//connect to ccnd
res = ccn_connect(ccn, NULL);
if (res == -1) {
fprintf(stderr, "Could not connect to ccnd... exiting\n");
exit(1);
}
#ifdef DEBUG
printf("Connected to CCND, return code: %d\n", res);
#endif
//allocate buffer for response
struct ccn_charbuf *resultbuf = ccn_charbuf_create();
if(resultbuf == NULL) {
fprintf(stderr, "Can not allocate memory for URI\n");
exit(1);
}
//setting the parameters for ccn_get
struct ccn_parsed_ContentObject pcobuf = { 0 };
int timeout_ms = 6000;
//express interest
//res = ccn_get(ccn, ccnb, NULL, timeout_ms, resultbuf, &pcobuf, NULL, 0);
//if cached answer is not allowed, set the template
//make sure AnswerOriginKind is 0x0
if(!ALLOW_CACHE) {
struct ccn_charbuf *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> */
ccn_charbuf_append_tt(templ, CCN_DTAG_AnswerOriginKind, CCN_DTAG);
ccnb_append_number(templ,0x0);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
ccn_charbuf_append_closer(templ);
//send out the interest
res = ccn_get(ccn, ccnb, templ, timeout_ms, resultbuf, &pcobuf, NULL, 0);
}
//cached answer is allowed, don't set template
else {
res = ccn_get(ccn, ccnb, NULL, timeout_ms, resultbuf, &pcobuf, NULL, 0);
}
if (res == -1) {
fprintf(stderr, "Did not receive answer for trace to %s\n", argv[1]);
#ifdef DEBUG
fprintf(stderr, "Did not receive answer for trace to URI: %s\n", URI);
#endif
exit(1);
}
//extract data from the response
const unsigned char *ptr;
size_t length;
ptr = resultbuf->buf;
length = resultbuf->length;
ccn_content_get_value(ptr, length, &pcobuf, &ptr, &length);
//check if received some data
if(length == 0) {
fprintf(stderr, "Received empty answer for trace to %s\n", argv[1]);
#ifdef DEBUG
fprintf(stderr, "Received empty answer for trace to URI: %s\n", URI);
#endif
exit(1);
}
//print the data
printf("Reply: %s\n", ptr);
printf("Length of data: %Zu\n", length);
exit(0);
}
int
main(int argc, char **argv)
{
struct ccn *h = NULL;
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *null_name = NULL;
struct ccn_charbuf *name_prefix = NULL;
struct ccn_charbuf *newface = NULL;
struct ccn_charbuf *prefixreg = NULL;
struct ccn_charbuf *resultbuf = NULL;
struct ccn_charbuf *temp = NULL;
struct ccn_charbuf *templ = NULL;
const unsigned char *ptr = NULL;
size_t length = 0;
const char *arg = NULL;
const char *progname = NULL;
struct ccn_parsed_ContentObject pcobuf = {0};
struct ccn_face_instance face_instance_storage = {0};
struct ccn_face_instance *face_instance = &face_instance_storage;
struct ccn_forwarding_entry forwarding_entry_storage = {0};
struct ccn_forwarding_entry *forwarding_entry = &forwarding_entry_storage;
struct ccn_signing_params sp = CCN_SIGNING_PARAMS_INIT;
struct ccn_charbuf *keylocator_templ = NULL;
struct ccn_keystore *keystore = NULL;
long expire = -1;
int ipproto;
unsigned char ccndid_storage[32] = {0};
const unsigned char *ccndid = NULL;
size_t ccndid_size = 0;
int res;
int opt;
progname = argv[0];
while ((opt = getopt(argc, argv, "h")) != -1) {
switch (opt) {
case 'h':
default:
usage(progname);
}
}
/* Sanity check the URI and argument count */
arg = argv[optind];
if (arg == NULL)
usage(progname);
name = ccn_charbuf_create();
res = ccn_name_from_uri(name, arg);
if (res < 0) {
fprintf(stderr, "%s: bad ccn URI: %s\n", progname, arg);
exit(1);
}
if (argc - optind < 3 || argc - optind > 4)
usage(progname);
h = ccn_create();
res = ccn_connect(h, NULL);
if (res < 0) {
ccn_perror(h, "ccn_connect");
exit(1);
}
newface = ccn_charbuf_create();
temp = ccn_charbuf_create();
templ = ccn_charbuf_create();
keylocator_templ = ccn_charbuf_create();
resultbuf = ccn_charbuf_create();
name_prefix = ccn_charbuf_create();
null_name = ccn_charbuf_create();
CHKRES(ccn_name_init(null_name));
keystore = ccn_keystore_create();
/* We need to figure out our local ccnd's CCIDID */
/* Set up our Interest template to indicate scope 1 */
ccn_charbuf_reset(templ);
ccnb_element_begin(templ, CCN_DTAG_Interest);
ccnb_element_begin(templ, CCN_DTAG_Name);
ccnb_element_end(templ); /* </Name> */
ccnb_tagged_putf(templ, CCN_DTAG_Scope, "1");
ccnb_element_end(templ); /* </Interest> */
ccn_charbuf_reset(name);
CHKRES(res = ccn_name_from_uri(name, "ccnx:/%C1.M.S.localhost/%C1.M.SRV/ccnd/KEY"));
CHKRES(res = ccn_get(h, name, templ, 200, resultbuf, &pcobuf, NULL, 0));
res = ccn_ref_tagged_BLOB(CCN_DTAG_PublisherPublicKeyDigest,
resultbuf->buf,
pcobuf.offset[CCN_PCO_B_PublisherPublicKeyDigest],
pcobuf.offset[CCN_PCO_E_PublisherPublicKeyDigest],
&ccndid, &ccndid_size);
CHKRES(res);
if (ccndid_size > sizeof(ccndid_storage))
CHKRES(-1);
memcpy(ccndid_storage, ccndid, ccndid_size);
ccndid = ccndid_storage;
face_instance->action = "newface";
face_instance->ccnd_id = ccndid;
face_instance->ccnd_id_size = ccndid_size;
if (strcmp(argv[optind + 1], "tcp") == 0)
ipproto = 6;
else if (strcmp(argv[optind + 1], "udp") == 0)
ipproto = 17;
else
ipproto = atoi(argv[optind + 1]);
face_instance->descr.ipproto = ipproto; // XXX - 6 = tcp or 17 = udp
face_instance->descr.address = argv[optind + 2];
face_instance->descr.port = argv[optind + 3];
if (face_instance->descr.port == NULL)
face_instance->descr.port = CCN_DEFAULT_UNICAST_PORT;
face_instance->descr.mcast_ttl = -1;
face_instance->lifetime = (~0U) >> 1;
CHKRES(res = ccnb_append_face_instance(newface, face_instance));
temp->length = 0;
CHKRES(ccn_charbuf_putf(temp, "%s/.ccnx/.ccnx_keystore", getenv("HOME")));
res = ccn_keystore_init(keystore,
ccn_charbuf_as_string(temp),
"Th1s1sn0t8g00dp8ssw0rd.");
CHKRES(res);
ccnb_element_begin(keylocator_templ, CCN_DTAG_SignedInfo);
ccnb_element_begin(keylocator_templ, CCN_DTAG_KeyLocator);
ccnb_element_begin(keylocator_templ, CCN_DTAG_Key);
CHKRES(ccn_append_pubkey_blob(keylocator_templ, ccn_keystore_public_key(keystore)));
ccnb_element_end(keylocator_templ); /* </Key> */
ccnb_element_end(keylocator_templ); /* </KeyLocator> */
ccnb_element_end(keylocator_templ); /* </SignedInfo> */
sp.template_ccnb = keylocator_templ;
sp.sp_flags |= CCN_SP_TEMPL_KEY_LOCATOR;
sp.freshness = expire;
ccn_charbuf_reset(temp);
res = ccn_sign_content(h, temp, null_name, &sp,
newface->buf, newface->length);
CHKRES(res);
/* Create the new face */
CHKRES(ccn_name_init(name));
CHKRES(ccn_name_append_str(name, "ccnx"));
CHKRES(ccn_name_append(name, ccndid, ccndid_size));
CHKRES(ccn_name_append(name, "newface", 7));
CHKRES(ccn_name_append(name, temp->buf, temp->length));
res = ccn_get(h, name, templ, 1000, resultbuf, &pcobuf, NULL, 0);
if (res < 0) {
fprintf(stderr, "no response from face creation request\n");
exit(1);
}
ptr = resultbuf->buf;
length = resultbuf->length;
res = ccn_content_get_value(resultbuf->buf, resultbuf->length, &pcobuf, &ptr, &length);
CHKRES(res);
face_instance = ccn_face_instance_parse(ptr, length);
if (face_instance == NULL)
CHKRES(res = -1);
CHKRES(face_instance->faceid);
/* Finally, register the prefix */
ccn_charbuf_reset(name_prefix);
CHKRES(ccn_name_from_uri(name_prefix, arg));
forwarding_entry->action = "prefixreg";
forwarding_entry->name_prefix = name_prefix;
forwarding_entry->ccnd_id = ccndid;
forwarding_entry->ccnd_id_size = ccndid_size;
forwarding_entry->faceid = face_instance->faceid;
forwarding_entry->flags = -1; /* let ccnd decide */
forwarding_entry->lifetime = (~0U) >> 1;
prefixreg = ccn_charbuf_create();
CHKRES(res = ccnb_append_forwarding_entry(prefixreg, forwarding_entry));
ccn_charbuf_reset(temp);
res = ccn_sign_content(h, temp, null_name, &sp,
prefixreg->buf, prefixreg->length);
CHKRES(res);
CHKRES(ccn_name_init(name));
CHKRES(ccn_name_append_str(name, "ccnx"));
CHKRES(ccn_name_append(name, ccndid, ccndid_size));
CHKRES(ccn_name_append_str(name, "prefixreg"));
CHKRES(ccn_name_append(name, temp->buf, temp->length));
res = ccn_get(h, name, templ, 1000, resultbuf, &pcobuf, NULL, 0);
if (res < 0) {
fprintf(stderr, "no response from prefix registration request\n");
exit(1);
}
fprintf(stderr, "Prefix %s will be forwarded to face %d\n", arg, face_instance->faceid);
/* We're about to exit, so don't bother to free everything. */
ccn_destroy(&h);
exit(res < 0);
}
enum ccn_upcall_res
incoming_content(
struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info)
{
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *templ = NULL;
struct ccn_charbuf *temp = NULL;
const unsigned char *ccnb = NULL;
size_t ccnb_size = 0;
const unsigned char *data = NULL;
size_t data_size = 0;
// TANG: no need to write data to stdout
//size_t written;
const unsigned char *ib = NULL; /* info->interest_ccnb */
struct ccn_indexbuf *ic = NULL;
int res;
struct mydata *md = selfp->data;
if (kind == CCN_UPCALL_FINAL) {
if (md != NULL) {
selfp->data = NULL;
free(md);
md = NULL;
}
return(CCN_UPCALL_RESULT_OK);
}
if (kind == CCN_UPCALL_INTEREST_TIMED_OUT)
return(CCN_UPCALL_RESULT_REEXPRESS);
if (kind != CCN_UPCALL_CONTENT && kind != CCN_UPCALL_CONTENT_UNVERIFIED)
return(CCN_UPCALL_RESULT_ERR);
if (md == NULL)
selfp->data = md = calloc(1, sizeof(*md));
ccnb = info->content_ccnb;
ccnb_size = info->pco->offset[CCN_PCO_E];
ib = info->interest_ccnb;
ic = info->interest_comps;
/* XXX - must verify sig, and make sure it is LEAF content */
res = ccn_content_get_value(ccnb, ccnb_size, info->pco, &data, &data_size);
if (res < 0) abort();
if (data_size > CHUNK_SIZE) {
/* For us this is spam. Give up now. */
fprintf(stderr, "*** Segment %d found with a data size of %d."
" This program only works with segments of 1024 bytes."
" Try ccncatchunks2 instead.\n",
(int)selfp->intdata, (int)data_size);
exit(1);
}
/* OK, we will accept this block. */
//sleep(1);
// TANG: No need to write data to stdout, skip 3 lines
//written = fwrite(data, data_size, 1, stdout);
//if (written != 1)
// exit(1);
/* A short block signals EOF for us. */
// TANG: to support data_size smaller than 1024, skip 2 lines
//if (data_size < CHUNK_SIZE)
// exit(0);
/* Ask for the next one */
name = ccn_charbuf_create();
ccn_name_init(name);
if (ic->n < 2) abort();
res = ccn_name_append_components(name, ib, ic->buf[0], ic->buf[ic->n - 2]);
if (res < 0) abort();
temp = ccn_charbuf_create();
//printf("intdata = %d \n ", selfp->intdata);
ccn_charbuf_putf(temp, "%d", ++(selfp->intdata));
ccn_name_append(name, temp->buf, temp->length);
ccn_charbuf_destroy(&temp);
if(DEBUG){
//Print out the interest's name
printf("Interest name = ");
int myres = 0;
struct ccn_indexbuf* ndx = ccn_indexbuf_create();
unsigned char* mycomp = NULL;
size_t mysize = 0;
ndx->n = 0;
myres = ccn_name_split(name, ndx);
if(myres < 0){
fprintf(stderr, "ccn_name_split @ ccntraffic. failed");
}
int it = 0;
for(it = 0; it < ndx->n-1; it++){
mysize = 0;
myres = ccn_name_comp_get(name->buf, ndx, it, &mycomp, &mysize);
printf("%s/", mycomp);
mycomp = NULL;
}
printf("\n");
}
templ = make_template(md);
res = ccn_express_interest(info->h, name, selfp, templ);
if (res < 0) abort();
ccn_charbuf_destroy(&templ);
ccn_charbuf_destroy(&name);
return(CCN_UPCALL_RESULT_OK);
}
enum ccn_upcall_res
ccn_text_handler(struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info)
{
UserDataBuf *userBuf = (UserDataBuf *)selfp->data;
if (userBuf == NULL || userBuf->iNeedDestroy) {
//if (userBuf != NULL) delete userBuf;
//selfp->data = NULL;
return CCN_UPCALL_RESULT_OK;
}
switch (kind) {
case CCN_UPCALL_INTEREST_TIMED_OUT: {
// if it's short Interest without seq, reexpress
// TODO: check whether the user is still in the conference
// don't re-express if it is not
return (CCN_UPCALL_RESULT_REEXPRESS);
}
case CCN_UPCALL_CONTENT_UNVERIFIED:
fprintf(stderr, "unverified content received\n");
return CCN_UPCALL_RESULT_OK;
case CCN_UPCALL_FINAL:
return CCN_UPCALL_RESULT_OK;
case CCN_UPCALL_CONTENT:
break;
default:
return CCN_UPCALL_RESULT_OK;
}
struct data_buffer *buffer = &userBuf->data_buf;
const unsigned char *content_value;
size_t len;
NDNState *state = buffer->state;
const unsigned char *ccnb = info->content_ccnb;
size_t ccnb_size = info->pco->offset[CCN_PCO_E];
struct ccn_indexbuf *comps = info->content_comps;
ccn_content_get_value(ccnb, ccnb_size, info->pco,
&content_value, &len);
unsigned char *msg = (unsigned char *)calloc((len + 1), sizeof(char));
memcpy(msg, content_value, len);
msg[len] = '\0';
QString textMsg = (const char *)msg;
state->emitTextMsgArrival(userBuf->user_name, textMsg);
free(msg);
long seq;
const unsigned char *seqptr = NULL;
char *endptr = NULL;
size_t seq_size = 0;
int k = comps->n - 2;
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) {
return CCN_UPCALL_RESULT_OK;
}
seq++;
struct ccn_charbuf *path = ccn_charbuf_create();
ccn_name_init(path);
ccn_name_append_components(path, ccnb, comps->buf[0], comps->buf[k]);
struct ccn_charbuf *temp = ccn_charbuf_create();
ccn_charbuf_putf(temp, "%ld", seq);
ccn_name_append(path, temp->buf, temp->length);
int res = ccn_express_interest(info->h, path, selfp, NULL);
if (res < 0) {
fprintf(stderr, "sending the first interest failed\n");
exit(1);
}
ccn_charbuf_destroy(&path);
ccn_charbuf_destroy(&temp);
return CCN_UPCALL_RESULT_OK;
}
/**
* Handle the incoming content messages. Extracts the data, and
* requests the next block in sequence if the received block was
* not the final one.
*/
enum ccn_upcall_res
incoming_content(struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info)
{
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *templ = NULL;
const unsigned char *ccnb = NULL;
size_t ccnb_size = 0;
const unsigned char *data = NULL;
size_t data_size = 0;
size_t written;
const unsigned char *ib = NULL; /* info->interest_ccnb */
struct ccn_indexbuf *ic = NULL;
int res;
struct mydata *md = selfp->data;
if (kind == CCN_UPCALL_FINAL) {
if (md != NULL) {
selfp->data = NULL;
free(md);
md = NULL;
}
return(CCN_UPCALL_RESULT_OK);
}
if (kind == CCN_UPCALL_INTEREST_TIMED_OUT)
return(CCN_UPCALL_RESULT_REEXPRESS);
if (kind == CCN_UPCALL_CONTENT_UNVERIFIED)
return(CCN_UPCALL_RESULT_VERIFY);
if (kind != CCN_UPCALL_CONTENT)
return(CCN_UPCALL_RESULT_ERR);
if (md == NULL)
selfp->data = md = calloc(1, sizeof(*md));
ccnb = info->content_ccnb;
ccnb_size = info->pco->offset[CCN_PCO_E];
ib = info->interest_ccnb;
ic = info->interest_comps;
res = ccn_content_get_value(ccnb, ccnb_size, info->pco, &data, &data_size);
if (res < 0) abort();
if (info->pco->type != CCN_CONTENT_DATA) {
/* For us this is spam. For now, give up. */
fprintf(stderr, "*** spammed at block %d\n", (int)selfp->intdata);
exit(1);
}
/* OK, we will accept this block. */
if (data_size == 0)
*(md->done) = 1;
else {
written = fwrite(data, data_size, 1, stdout);
if (written != 1)
exit(1);
}
// XXX The test below should get refactored into the library
if (info->pco->offset[CCN_PCO_B_FinalBlockID] !=
info->pco->offset[CCN_PCO_E_FinalBlockID]) {
const unsigned char *finalid = NULL;
size_t finalid_size = 0;
const unsigned char *nameid = NULL;
size_t nameid_size = 0;
struct ccn_indexbuf *cc = info->content_comps;
ccn_ref_tagged_BLOB(CCN_DTAG_FinalBlockID, ccnb,
info->pco->offset[CCN_PCO_B_FinalBlockID],
info->pco->offset[CCN_PCO_E_FinalBlockID],
&finalid,
&finalid_size);
if (cc->n < 2) abort();
ccn_ref_tagged_BLOB(CCN_DTAG_Component, ccnb,
cc->buf[cc->n - 2],
cc->buf[cc->n - 1],
&nameid,
&nameid_size);
if (finalid_size == nameid_size &&
0 == memcmp(finalid, nameid, nameid_size))
*(md->done) = 1;
}
if (*(md->done)) {
ccn_set_run_timeout(info->h, 0);
return(CCN_UPCALL_RESULT_OK);
}
/* Ask for the next fragment */
name = ccn_charbuf_create();
ccn_name_init(name);
if (ic->n < 2) abort();
res = ccn_name_append_components(name, ib, ic->buf[0], ic->buf[ic->n - 2]);
if (res < 0) abort();
ccn_name_append_numeric(name, CCN_MARKER_SEQNUM, ++(selfp->intdata));
templ = make_template(md, info);
res = ccn_express_interest(info->h, name, selfp, templ);
if (res < 0) abort();
ccn_charbuf_destroy(&templ);
ccn_charbuf_destroy(&name);
return(CCN_UPCALL_RESULT_OK);
}