int
encode_message(struct ccn_charbuf *message, struct path * name_path,
char *data, size_t len, struct ccn_charbuf *signed_info,
const void *pkey, const char *digest_algorithm) {
struct ccn_charbuf *path = ccn_charbuf_create();
int i;
int res;
if (path == NULL || ccn_name_init(path) == -1) {
fprintf(stderr, "Failed to allocate or initialize content path\n");
return -1;
}
for (i = 0; i < name_path->count; i++) {
ccn_name_append_str(path, name_path->comps[i]);
}
res = ccn_encode_ContentObject(message, path, signed_info, data, len, digest_algorithm, pkey);
if (res != 0) {
fprintf(stderr, "Failed to encode ContentObject\n");
}
ccn_charbuf_destroy(&path);
return(res);
}
static PyObject *
Exclusion_Name_Obj(unsigned char *buf, size_t start, size_t stop)
{
struct ccn_charbuf *name;
PyObject *py_name, *res;
int r;
py_name = CCNObject_New_charbuf(NAME, &name);
JUMP_IF_NULL(py_name, error);
r = ccn_name_init(name);
JUMP_IF_NEG_MEM(r, error);
r = ccn_name_append_components(name, buf, start, stop);
JUMP_IF_NEG_MEM(r, error);
res = Name_obj_from_ccn(py_name);
Py_DECREF(py_name);
return res;
error:
Py_XDECREF(py_name);
return NULL;
}
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);
}
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;
}
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 void
collect_forwarding_html(struct ccnd_handle *h, struct ccn_charbuf *b)
{
struct hashtb_enumerator ee;
struct hashtb_enumerator *e = ⅇ
struct ccn_forwarding *f;
int res;
struct ccn_charbuf *name = ccn_charbuf_create();
ccn_charbuf_putf(b, "<h4>Forwarding</h4>" NL);
ccn_charbuf_putf(b, "<ul>");
hashtb_start(h->nameprefix_tab, e);
for (; e->data != NULL; hashtb_next(e)) {
struct nameprefix_entry *ipe = e->data;
ccn_name_init(name);
res = ccn_name_append_components(name, e->key, 0, e->keysize);
if (res < 0)
abort();
if (0) {
ccn_charbuf_putf(b, " <li>");
ccn_uri_append(b, name->buf, name->length, 1);
ccn_charbuf_putf(b, "</li>" NL);
}
for (f = ipe->forwarding; f != NULL; f = f->next) {
if ((f->flags & (CCN_FORW_ACTIVE | CCN_FORW_PFXO)) != 0) {
ccn_name_init(name);
ccn_name_append_components(name, e->key, 0, e->keysize);
ccn_charbuf_putf(b, " <li>");
ccn_uri_append(b, name->buf, name->length, 1);
ccn_charbuf_putf(b,
" <b>face:</b> %u"
" <b>flags:</b> 0x%x"
" <b>expires:</b> %d",
f->faceid,
f->flags & CCN_FORW_PUBMASK,
f->expires);
ccn_charbuf_putf(b, "</li>" NL);
}
}
}
hashtb_end(e);
ccn_charbuf_destroy(&name);
ccn_charbuf_putf(b, "</ul>");
}
/*
* Utility routines to allocate/deallocate ccns_slice structures
*/
struct ccns_slice *
ccns_slice_create() {
struct ccns_slice *s = calloc(1, sizeof(*s));
if (s == NULL)
return(NULL);
s->version = SLICE_VERSION;
s->topo = ccn_charbuf_create_n(8); // name encoding requires minimum 2
s->prefix = ccn_charbuf_create_n(8);
if (s->topo == NULL || s->prefix == NULL) {
ccn_charbuf_destroy(&s->topo);
ccn_charbuf_destroy(&s->prefix);
free(s);
s = NULL;
} else {
ccn_name_init(s->topo);
ccn_name_init(s->prefix);
}
return(s);
}
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);
}
/*
* initialize local data
*/
void init_data(struct ccn_charbuf *local_scope_template,
struct ccn_charbuf *no_name)
{
ccn_charbuf_append_tt(local_scope_template, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(local_scope_template, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(local_scope_template); /* </Name> */
ccnb_tagged_putf(local_scope_template, CCN_DTAG_Scope, "1");
ccn_charbuf_append_closer(local_scope_template); /* </Interest> */
ccn_name_init(no_name);
}
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);
}
}
/**
* Find and consume interests that match given content.
*
* Schedules the sending of the content.
* If fdholder is not NULL, pay attention only to interests from that fdholder.
* It is allowed to pass NULL for pc, but if you have a (valid) one it
* will avoid a re-parse.
* For new content, from_face is the source; for old content, from_face is NULL.
* @returns number of matches, or -1 if the new content should be dropped.
*/
PUBLIC int
r_match_match_interests(struct ccnr_handle *h, struct content_entry *content,
struct ccn_parsed_ContentObject *pc,
struct fdholder *fdholder, struct fdholder *from_face)
{
int n_matched = 0;
int new_matches;
struct nameprefix_entry *npe = NULL;
int ci = 0;
int cm = 0;
struct ccn_charbuf *name = NULL;
struct ccn_indexbuf *namecomps = NULL;
unsigned c0 = 0;
name = ccn_charbuf_create();
ccn_name_init(name);
r_store_name_append_components(name, h, content, 0, -1);
namecomps = ccn_indexbuf_create();
ccn_name_split(name, namecomps);
c0 = namecomps->buf[0];
for (ci = namecomps->n - 1; ci >= 0; ci--) {
int size = namecomps->buf[ci] - c0;
npe = hashtb_lookup(h->nameprefix_tab, name->buf + c0, size);
if (npe != NULL)
break;
}
ccn_charbuf_destroy(&name);
ccn_indexbuf_destroy(&namecomps);
for (; npe != NULL; npe = npe->parent, ci--) {
// if (npe->fgen != h->forward_to_gen)
// r_fwd_update_forward_to(h, npe);
if (from_face != NULL && (npe->flags & CCN_FORW_LOCAL) != 0 &&
(from_face->flags & CCNR_FACE_GG) == 0)
return(-1);
new_matches = r_match_consume_matching_interests(h, npe, content, pc, fdholder);
// if (from_face != NULL && (new_matches != 0 || ci + 1 == cm))
// note_content_from(h, npe, from_face->filedesc, ci);
if (new_matches != 0) {
cm = ci; /* update stats for this prefix and one shorter */
n_matched += new_matches;
}
}
return(n_matched);
}
int sign_interest(struct ccn_charbuf* name_signed, struct ccn_charbuf* name,
struct ccn_charbuf* signed_info, const char* digest_algorithm, struct ccn_pkey* key) {
int res = 0;
// Now assemble a signed Content object
// Use ccn_encode_ContentObject so we can specify the key of our choice
struct ccn_charbuf *tempContentObj = ccn_charbuf_create();
res = ccn_encode_ContentObject(tempContentObj, name, signed_info, NULL /* no data */, 0,
digest_algorithm, key);
if (res < 0) {
fprintf(stderr, "Error building content object (res == %d)\n", res);
return(res);
}
// Call replace_name to knock out the name;
// it would be more efficient to assemble this with no name a modified ccn_encode_ContentObject() call
// but that requires modification to the library function
struct ccn_charbuf *empty_name = ccn_charbuf_create();
struct ccn_charbuf *sigContentObj = ccn_charbuf_create();
ccn_name_init(empty_name);
// First prepend the namespace; (should this be done as a "name component"?)
ccn_charbuf_append(sigContentObj, NS_SIGNATURE, NS_SIGNATURE_LEN);
replace_name(sigContentObj, tempContentObj->buf, tempContentObj->length, empty_name);
//fprintf(stderr, "replace_name == %d (%s)\n", res, (res==0)?"ok":"fail");
/*
// Check that we didn't break things
struct ccn_parsed_ContentObject pco = {0};
res = ccn_parse_ContentObject(&sigContentObj->buf[NS_SIGNATURE_LEN], sigContentObj->length - NS_SIGNATURE_LEN, &pco, NULL);
if (res < 0) {
fprintf(stderr, "Error parsing built content object (res == %d)\n", res);
return(1);
}
*/
ccn_charbuf_destroy(&empty_name);
ccn_charbuf_destroy(&tempContentObj);
// Build the final name for the interest <prefix>/<namespace><contentObj>
ccn_charbuf_append_charbuf(name_signed, name); // Copy the name
ccn_name_append(name_signed, sigContentObj->buf, sigContentObj->length); // Concatenate the new component
// Dump the signature
// print_hex(stderr,&(sigContentObj->buf)[NS_SIGNATURE_LEN],sigContentObj->length - NS_SIGNATURE_LEN,12);
// fprintf(stderr,"\n");
//
ccn_charbuf_destroy(&sigContentObj);
return (res);
}
static void
collect_forwarding_xml(struct ccnd_handle *h, struct ccn_charbuf *b)
{
struct hashtb_enumerator ee;
struct hashtb_enumerator *e = ⅇ
struct ccn_forwarding *f;
int res;
struct ccn_charbuf *name = ccn_charbuf_create();
ccn_charbuf_putf(b, "<forwarding>");
hashtb_start(h->nameprefix_tab, e);
for (; e->data != NULL; hashtb_next(e)) {
struct nameprefix_entry *ipe = e->data;
for (f = ipe->forwarding, res = 0; f != NULL && !res; f = f->next) {
if ((f->flags & (CCN_FORW_ACTIVE | CCN_FORW_PFXO)) != 0)
res = 1;
}
if (res) {
ccn_name_init(name);
ccn_name_append_components(name, e->key, 0, e->keysize);
ccn_charbuf_putf(b, "<fentry>");
ccn_charbuf_putf(b, "<prefix>");
ccn_uri_append(b, name->buf, name->length, 1);
ccn_charbuf_putf(b, "</prefix>");
for (f = ipe->forwarding; f != NULL; f = f->next) {
if ((f->flags & (CCN_FORW_ACTIVE | CCN_FORW_PFXO)) != 0) {
ccn_charbuf_putf(b,
"<dest>"
"<faceid>%u</faceid>"
"<flags>%x</flags>"
"<expires>%d</expires>"
"</dest>",
f->faceid,
f->flags & CCN_FORW_PUBMASK,
f->expires);
}
}
ccn_charbuf_putf(b, "</fentry>");
}
}
hashtb_end(e);
ccn_charbuf_destroy(&name);
ccn_charbuf_putf(b, "</forwarding>");
}
struct ccn_charbuf* CcnH_signForwardingEntry(struct ccn* ccnh, CCNDID ccndid, struct ccn_forwarding_entry* fe) {
struct ccn_charbuf* request = ccn_charbuf_create();
ccnb_append_forwarding_entry(request, fe);
struct ccn_charbuf* emptyname = ccn_charbuf_create();
ccn_name_init(emptyname);
struct ccn_charbuf* signed_request = ccn_charbuf_create();
ccn_sign_content(ccnh, signed_request, emptyname, NULL, request->buf, request->length);
struct ccn_charbuf* reqname = ccn_charbuf_create();
ccn_name_from_uri(reqname, "ccnx:/ccnx");
ccn_name_append(reqname, ccndid, CCNDID_length);
ccn_name_append_str(reqname, fe->action);
ccn_name_append(reqname, signed_request->buf, signed_request->length);
ccn_charbuf_destroy(&request);
ccn_charbuf_destroy(&emptyname);
ccn_charbuf_destroy(&signed_request);
return reqname;
}
PUBLIC struct content_entry *
r_store_next_child_at_level(struct ccnr_handle *h,
struct content_entry *content, int level)
{
struct content_entry *next = NULL;
struct ccn_charbuf *name;
struct ccn_charbuf *flatname = NULL;
int res;
if (content == NULL)
return(NULL);
name = ccn_charbuf_create();
ccn_name_init(name);
res = ccn_name_append_flatname(name,
content->flatname->buf,
content->flatname->length, 0, level + 1);
if (res < level)
goto Bail;
if (res == level)
res = ccn_name_append(name, NULL, 0);
else if (res == level + 1)
res = ccn_name_next_sibling(name); // XXX - would be nice to have a flatname version of this
if (res < 0)
goto Bail;
if (CCNSHOULDLOG(h, LM_8, CCNL_FINER))
ccnr_debug_ccnb(h, __LINE__, "child_successor", NULL,
name->buf, name->length);
flatname = ccn_charbuf_create();
ccn_flatname_from_ccnb(flatname, name->buf, name->length);
next = r_store_look(h, flatname->buf, flatname->length);
if (next == content) {
// XXX - I think this case should not occur, but just in case, avoid a loop.
ccnr_debug_content(h, __LINE__, "urp", NULL, next);
next = NULL;
}
Bail:
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&flatname);
return(next);
}
/**
* Like ccn_uri_append(), but accepts a flatname instead of ccnb
*/
int
ccn_uri_append_flatname(struct ccn_charbuf *uri,
const unsigned char *flatname, size_t size,
int includescheme)
{
struct ccn_charbuf *ccnb = NULL;
int res;
ccnb = ccn_charbuf_create();
if (ccnb == NULL)
return(-1);
res = ccn_name_init(ccnb);
if (res < 0)
goto Bail;
res = ccn_name_append_flatname(ccnb, flatname, size, 0, -1);
if (res < 0)
goto Bail;
res = ccn_uri_append(uri, ccnb->buf, ccnb->length, includescheme);
Bail:
ccn_charbuf_destroy(&ccnb);
return(res);
}
void
get_name_part(struct name_prefix *name_part,struct ccn_charbuf * interest_ccnb,
struct ccn_indexbuf *interest_comps, int offset)
{
int lsa_position=0;
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);
lsa_position=components->n-2;
ccn_charbuf_destroy(&name);
struct ccn_charbuf *temp=ccn_charbuf_create();
ccn_name_init(temp);
ccn_name_append_components( temp, interest_ccnb->buf,
interest_comps->buf[lsa_position+1],
interest_comps->buf[interest_comps->n - 1]);
struct ccn_charbuf *temp1=ccn_charbuf_create();
ccn_uri_append(temp1, temp->buf, temp->length, 0);
name_part->name=(char *)calloc(strlen(ccn_charbuf_as_string(temp1))+1,
sizeof(char));
memcpy(name_part->name,ccn_charbuf_as_string(temp1),
strlen(ccn_charbuf_as_string(temp1)));
name_part->name[strlen(ccn_charbuf_as_string(temp1))]='\0';
name_part->length=strlen(ccn_charbuf_as_string(temp1))+1;
ccn_charbuf_destroy(&temp1);
ccn_charbuf_destroy(&temp);
ccn_indexbuf_destroy(&components);
if ( nlsr->debugging )
printf("Name Part: %s \n",name_part->name);
}
int
main(int argc, char **argv)
{
struct ccn_keystore *keystore = NULL;
int res = 0;
struct ccn_charbuf *signed_info = ccn_charbuf_create();
int i;
int sec, usec;
char msgbuf[PAYLOAD_SIZE];
struct timeval start, end;
struct ccn_charbuf *message = ccn_charbuf_create();
struct ccn_charbuf *path = ccn_charbuf_create();
struct ccn_charbuf *seq = ccn_charbuf_create();
struct ccn_charbuf *temp = ccn_charbuf_create();
keystore = ccn_keystore_create();
ccn_charbuf_putf(temp, "%s/.ccnx/.ccnx_keystore", getenv("HOME"));
res = ccn_keystore_init(keystore,
ccn_charbuf_as_string(temp),
"Th1s1sn0t8g00dp8ssw0rd.");
if (res != 0) {
printf("Failed to initialize keystore %s\n", ccn_charbuf_as_string(temp));
exit(1);
}
ccn_charbuf_destroy(&temp);
res = ccn_signed_info_create(signed_info,
/* pubkeyid */ ccn_keystore_public_key_digest(keystore),
/* publisher_key_id_size */ ccn_keystore_public_key_digest_length(keystore),
/* datetime */ NULL,
/* type */ CCN_CONTENT_DATA,
/* freshness */ FRESHNESS,
/*finalblockid*/ NULL,
/* keylocator */ NULL);
srandom(time(NULL));
for (i=0; i<PAYLOAD_SIZE; i++) {
msgbuf[i] = random();
}
printf("Generating %d signed ContentObjects (one . per 100)\n", COUNT);
gettimeofday(&start, NULL);
for (i=0; i<COUNT; i++) {
if (i>0 && (i%100) == 0) {
printf(".");
fflush(stdout);
}
ccn_name_init(path);
ccn_name_append_str(path, "rtp");
ccn_name_append_str(path, "protocol");
ccn_name_append_str(path, "13.2.117.34");
ccn_name_append_str(path, "domain");
ccn_name_append_str(path, "smetters");
ccn_name_append_str(path, "principal");
ccn_name_append_str(path, "2021915340");
ccn_name_append_str(path, "id");
ccn_charbuf_putf(seq, "%u", i);
ccn_name_append(path, seq->buf, seq->length);
ccn_name_append_str(path, "seq");
res = ccn_encode_ContentObject(/* out */ message,
path, signed_info,
msgbuf, PAYLOAD_SIZE,
/* digest_algorithm */ NULL,
ccn_keystore_private_key(keystore));
ccn_charbuf_reset(message);
ccn_charbuf_reset(path);
ccn_charbuf_reset(seq);
}
gettimeofday(&end, NULL);
sec = end.tv_sec - start.tv_sec;
usec = (int)end.tv_usec - (int)start.tv_usec;
while (usec < 0) {
sec--;
usec += 1000000;
}
printf("\nComplete in %d.%06d secs\n", sec, usec);
return(0);
}
// 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);
}
void GroupManager::expressEnumInterest(struct ccn_charbuf *interest, QList<QString> &toExclude) {
if (toExclude.size() == 0) {
mutex_trylock();
int res = ccn_express_interest(ccn, interest, join_closure, NULL);
mutex_unlock();
if (res < 0) {
critical("express interest failed!");
}
ccn_charbuf_destroy(&interest);
return;
}
struct ccn_charbuf **excl = NULL;
if (toExclude.size() > 0) {
excl = new ccn_charbuf *[toExclude.size()];
for (int i = 0; i < toExclude.size(); i ++) {
QString compName = toExclude.at(i);
struct ccn_charbuf *comp = ccn_charbuf_create();
ccn_name_init(comp);
ccn_name_append_str(comp, compName.toStdString().c_str());
excl[i] = comp;
comp = NULL;
}
qsort(excl, toExclude.size(), sizeof(excl[0]), &namecompare);
}
int begin = 0;
bool excludeLow = false;
bool excludeHigh = true;
while (begin < toExclude.size()) {
if (begin != 0) {
excludeLow = true;
}
struct ccn_charbuf *templ = ccn_charbuf_create();
ccn_charbuf_append_tt(templ, CCN_DTAG_Interest, CCN_DTAG); // <Interest>
ccn_charbuf_append_tt(templ, CCN_DTAG_Name, CCN_DTAG); // <Name>
ccn_charbuf_append_closer(templ); // </Name>
ccn_charbuf_append_tt(templ, CCN_DTAG_Exclude, CCN_DTAG); // <Exclude>
if (excludeLow) {
append_bf_all(templ);
}
for (; begin < toExclude.size(); begin++) {
struct ccn_charbuf *comp = excl[begin];
if (comp->length < 4) abort();
// we are being conservative here
if (interest->length + templ->length + comp->length > 1350) {
break;
}
ccn_charbuf_append(templ, comp->buf + 1, comp->length - 2);
}
if (begin == toExclude.size()) {
excludeHigh = false;
}
if (excludeHigh) {
append_bf_all(templ);
}
ccn_charbuf_append_closer(templ); // </Exclude>
ccn_charbuf_append_closer(templ); // </Interest>
mutex_trylock();
int res = ccn_express_interest(ccn, interest, join_closure, templ);
mutex_unlock();
if (res < 0) {
critical("express interest failed!");
}
ccn_charbuf_destroy(&templ);
}
ccn_charbuf_destroy(&interest);
for (int i = 0; i < toExclude.size(); i++) {
ccn_charbuf_destroy(&excl[i]);
}
if (excl != NULL) {
delete []excl;
}
}
/**
*
* 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;
}
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);
}
/*
* This upcall gets called for each piece of incoming content that
* matches one of our interests. We need to issue a new interest that
* excludes another component at the current level, and perhaps also
* and interest to start exploring the next level. Thus if the matched
* interest is
* /a/b/c exclude {d,e,f,i,j,k}
* and we get
* /a/b/c/g/h
* we would issue a new interest
* /a/b/c exclude {d,e,f,g,i,j,k}
* to continue exploring the current level, plus a simple interest
* /a/b/c/g
* to start exploring the next level as well.
*
* This does end up fetching each piece of content multiple times, once for
* each level in the name. The repeated requests will be answered from the local
* content store, though, and so should not generate extra network traffic.
* There is a lot of unanswerable interest generated, though.
*
* To prevent the interests from becoming too huge, we may need to split them.
* Thus if the first new interest above were deemed too large, we could instead
* issue the two interests
* /a/b/c exclude {d,e,f,g,*}
* /a/b/c exclude {*,g,i,j,k}
* where * stands for a Bloom filter that excludes anything. Note the
* repetition of g to ensure that these two interests cover disjoint portions
* of the hierarchy. We need to keep track of the endpoint conditions
* as well as the excluded set in our upcall data.
* When a split happens, we need a new closure to track it, as we do when
* we start exploring a new level.
*/
static enum ccn_upcall_res
incoming_content(
struct ccn_closure *selfp,
enum ccn_upcall_kind kind,
struct ccn_upcall_info *info)
{
struct ccn_charbuf *c = NULL;
struct ccn_charbuf *comp = NULL;
struct ccn_charbuf *uri = NULL;
const unsigned char *ccnb = NULL;
size_t ccnb_size = 0;
struct ccn_indexbuf *comps = NULL;
int matched_comps = 0;
int res;
int i;
struct ccn_traversal *data = get_my_data(selfp);
if (kind == CCN_UPCALL_FINAL) {
for (i = 0; i < data->n_excl; i++)
ccn_charbuf_destroy(&(data->excl[i]));
if (data->excl != NULL)
free(data->excl);
free(data);
free(selfp);
return(0);
}
if (kind == CCN_UPCALL_INTEREST_TIMED_OUT)
return(0);
if (kind == CCN_UPCALL_CONTENT_BAD)
return(0);
if (kind == CCN_UPCALL_CONTENT_UNVERIFIED) {
if ((data->flags & MUST_VERIFY) != 0)
return(CCN_UPCALL_RESULT_VERIFY);
}
if (kind != CCN_UPCALL_CONTENT && kind != CCN_UPCALL_CONTENT_UNVERIFIED) abort();
ccnb = info->content_ccnb;
ccnb_size = info->pco->offset[CCN_PCO_E];
comps = info->content_comps;
matched_comps = info->pi->prefix_comps;
c = ccn_charbuf_create();
uri = ccn_charbuf_create();
if (matched_comps + 1 > comps->n) {
ccn_uri_append(c, ccnb, ccnb_size, 1);
fprintf(stderr, "How did this happen? %s\n", ccn_charbuf_as_string(uri));
exit(1);
}
data->counter[0]++; /* Tell main that something new came in */
/* Recover the same prefix as before */
ccn_name_init(c);
ccn_name_append_components(c, ccnb, comps->buf[0], comps->buf[matched_comps]);
comp = ccn_charbuf_create();
ccn_name_init(comp);
if (matched_comps + 1 == comps->n) {
/* Reconstruct the implicit content digest component */
ccn_digest_ContentObject(ccnb, info->pco);
ccn_name_append(comp, info->pco->digest, info->pco->digest_bytes);
}
else {
ccn_name_append_components(comp, ccnb,
comps->buf[matched_comps],
comps->buf[matched_comps + 1]);
}
data->excl = realloc(data->excl, (data->n_excl + 1) * sizeof(data->excl[0]));
data->excl[data->n_excl++] = comp;
comp = NULL;
qsort(data->excl, data->n_excl, sizeof(data->excl[0]), &namecompare);
res = express_my_interest(info->h, selfp, c);
if (res == -1) {
struct ccn_closure *high = split_my_excludes(selfp);
if (high == NULL) abort();
express_my_interest(info->h, selfp, c);
express_my_interest(info->h, high, c);
}
/* Explore the next level, if there is one. */
if (matched_comps + 2 < comps->n) {
struct ccn_traversal *newdat = NULL;
struct ccn_closure *cl;
newdat = calloc(1, sizeof(*newdat));
newdat->magic = 68955871;
newdat->warn = 1492;
newdat->counter = data->counter;
newdat->flags = data->flags & ~(EXCLUDE_LOW | EXCLUDE_HIGH);
newdat->n_excl = 0;
newdat->excl = NULL;
cl = calloc(1, sizeof(*cl));
cl->p = &incoming_content;
cl->data = newdat;
ccn_name_init(c);
ccn_name_append_components(c, ccnb,
comps->buf[0],
comps->buf[matched_comps + 1]);
express_my_interest(info->h, cl, c);
}
else {
res = ccn_uri_append(uri, info->content_ccnb, info->pco->offset[CCN_PCO_E], 1);
if (res < 0)
fprintf(stderr, "*** Error: ccn_traverse line %d res=%d\n", __LINE__, res);
else
printf("%s\n", ccn_charbuf_as_string(uri));
}
ccn_charbuf_destroy(&c);
ccn_charbuf_destroy(&uri);
return(0);
}
/**
* Call-back from the CCN network that something has arrived
*
* We get notified that a client has interests in things we are producing.
* This function will do some basic checking to see what exactly the client has
* an interest in, and will produce what is appropriate.
* Currently the things we produce are:
* \li last block - we resend the last block we have published for a given name
* \li last segment - we produce a data message that only contains the latest segment number we used
*
* \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
new_interests (struct ccn_closure *selfp,
enum ccn_upcall_kind kind, struct ccn_upcall_info *info)
{
Gstccnxsink *me = GST_CCNXSINK (selfp->data);
struct ccn_charbuf *cb;
struct ccn_charbuf *sname = NULL;
const unsigned char *cp1, *cp2;
size_t sz1;
size_t sz2;
long lastSeq;
struct ccn_signing_params myparams;
unsigned int i;
int rc;
GST_DEBUG ("something has arrived!");
GST_DEBUG ("matched is: %d", info->matched_comps); // number of filter components that were matched by the interest
cb = interestAsUri (info);
GST_DEBUG ("as URI: %s", ccn_charbuf_as_string (cb));
ccn_charbuf_destroy (&cb);
myparams = me->sp;
/* Some debugging stuff */
for (i = 0; i < 10; ++i) {
const unsigned char *cp;
size_t sz;
GST_DEBUG ("%3d: ", i);
if (0 > ccn_name_comp_get (info->interest_ccnb, info->interest_comps, i,
&cp, &sz)) {
// fprintf(stderr, "could not get comp\n");
break;
} else {
// hDump( DUMP_ADDR( cp ), DUMP_SIZE( sz ) );
}
}
switch (kind) {
case CCN_UPCALL_FINAL:
GST_LOG_OBJECT (me, "CCN upcall final %p", selfp);
return (0);
case CCN_UPCALL_INTEREST_TIMED_OUT:
if (selfp != me->ccn_closure) {
GST_LOG_OBJECT (me, "CCN Interest timed out on dead closure %p", selfp);
return (0);
}
GST_LOG_OBJECT (me, "CCN upcall reexpress -- timed out");
if (me->timeouts > 5) {
GST_LOG_OBJECT (me, "CCN upcall reexpress -- too many reexpressions");
return (0);
}
me->timeouts++;
return (CCN_UPCALL_RESULT_REEXPRESS);
case CCN_UPCALL_CONTENT_UNVERIFIED:
if (selfp != me->ccn_closure) {
GST_LOG_OBJECT (me, "CCN unverified content on dead closure %p", selfp);
return (0);
}
return (CCN_UPCALL_RESULT_VERIFY);
case CCN_UPCALL_CONTENT:
if (selfp != me->ccn_closure) {
GST_LOG_OBJECT (me, "CCN content on dead closure %p", selfp);
return (0);
}
break;
case CCN_UPCALL_CONTENT_BAD:
GST_LOG_OBJECT (me,
"Content signature verification failed! Discarding.\n");
return (CCN_UPCALL_RESULT_ERR);
case CCN_UPCALL_CONSUMED_INTEREST:
GST_LOG_OBJECT (me, "Upcall consumed interest\n");
return (CCN_UPCALL_RESULT_ERR); /* no data */
/* Here is the most interesting case...when an interest arrives */
case CCN_UPCALL_INTEREST:
GST_INFO ("We got an interest\n");
myparams.freshness = 1; /* meta data is old very quickly */
/* See if any meta information is sought */
for (i = 0;; ++i) {
if (0 > ccn_name_comp_get (info->interest_ccnb, info->interest_comps, i,
&cp1, &sz1)) {
cp1 = NULL;
break;
} else {
if (!strncmp ((const char *) cp1, "_meta_", 6)) { // OK, found meta, now which one is needed?
if (0 > ccn_name_comp_get (info->interest_ccnb,
info->interest_comps, i + 1, &cp2, &sz2)) {
GST_LOG_OBJECT (me,
"CCN interest received with invalid meta request");
cp1 = NULL;
}
break;
} // Component not meta, keep looking
}
} // At this point, i is left pointing at '_meta_' or at the end of component list
if (cp1) {
// hDump( DUMP_ADDR(cp1), DUMP_SIZE(sz1) );
// hDump( DUMP_ADDR(cp2), DUMP_SIZE(sz2) );
if (strncmp ((const char *) cp2, ".segment", 8))
goto Exit_Interest; /* not a match */
/* publish what segment we are up to in reply to the meta request */
lastSeq = me->segment - 1;
GST_INFO ("sending meta data....segment: %d", lastSeq);
sname = ccn_charbuf_create ();
ccn_name_init (sname);
rc = ccn_name_append_components (sname, info->interest_ccnb,
info->interest_comps->buf[0], info->interest_comps->buf[i + 2]);
if (rc < 0)
goto Error_Interest;
// rc = ccn_create_version(me->ccn, sname, CCN_V_REPLACE | CCN_V_NOW | CCN_V_HIGH, 0, 0);
// if (rc < 0) goto Error_Interest;
me->temp->length = 0;
rc = ccn_sign_content (me->ccn, me->temp, sname, &myparams,
&lastSeq, sizeof (lastSeq));
// hDump(DUMP_ADDR(sname->buf), DUMP_SIZE(sname->length));
if (rc != 0) {
GST_LOG_OBJECT (me, "Failed to encode ContentObject (rc == %d)\n",
rc);
goto Error_Interest;
}
GST_INFO ("sending meta data...");
// hDump(DUMP_ADDR(me->temp->buf), DUMP_SIZE(me->temp->length));
rc = ccn_put (me->ccn, me->temp->buf, me->temp->length);
me->temp->length = 0;
if (rc < 0) {
GST_LOG_OBJECT (me, "ccn_put failed (res == %d)\n", rc);
goto Error_Interest;
}
GST_INFO ("meta data sent");
} else
goto Exit_Interest; /* do not have _meta_ */
Exit_Interest:
ccn_charbuf_destroy (&sname);
break;
Error_Interest:
ccn_charbuf_destroy (&sname);
return CCN_UPCALL_RESULT_ERR;
default:
GST_LOG_OBJECT (me, "CCN upcall result error");
return (CCN_UPCALL_RESULT_ERR);
}
me->timeouts = 0;
return (CCN_UPCALL_RESULT_OK);
}
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);
}
void GroupManager::incomingInterest(ccn_upcall_info *info) {
int res;
const char *data = NULL;
const unsigned char *requester = NULL;
const unsigned char *refresher = NULL;
const unsigned char *filter = NULL;
size_t filter_len = 0;
ccn_charbuf *signed_info = NULL;
ccn_charbuf *name = NULL;
ccn_charbuf *content = NULL;
RemoteUser *refreshUser = NULL;
// requesterPrefix starts from index 4 to (info->interest_comps->n - 2)
int nameEnd = 0;
nameEnd = (info->interest_comps)->n - 2;
/* construct reply data
* name format:
* /ndn/broadcast/conference/conference-name/speaker-list/username
*/
signed_info = ccn_charbuf_create();
struct ccn_charbuf *keylocator = ccn_charbuf_create();
ccn_create_keylocator(keylocator, ccn_keystore_public_key(cached_keystore));
res = ccn_signed_info_create(signed_info,
/*pubkeyid*/ get_my_publisher_key_id(),
/*publisher_key_id_size*/ get_my_publisher_key_id_length(),
/*datetime*/ NULL,
/*type*/ CCN_CONTENT_DATA,
///*freshness*/ -1,
/*freshness*/ FRESHNESS,
/*finalblockid*/ NULL,
/*keylocator*/ keylocator);
if (res < 0) {
DPRINT("FAILED TO CREATE signed_info (res == %d)", res);
}
name = ccn_charbuf_create();
content = ccn_charbuf_create();
ccn_name_init(name);
ccn_name_append_components(name, info->interest_ccnb,
info->interest_comps->buf[0], info->interest_comps->buf[nameEnd + 1]);
// append own username
ccn_name_append_str(name, userName.toLocal8Bit().constData());
// get user list, the caller need to free the data buffer allocated
int dlen = userListtoXml(&data);
ccn_encode_ContentObject(content, name, signed_info,
data, dlen,
NULL, get_my_private_key());
// already have the lock, no need to trylock
ccn_put(info->h, content->buf, content->length);
ccn_charbuf_destroy(&signed_info);
ccn_charbuf_destroy(&name);
ccn_charbuf_destroy(&content);
if (data != NULL) {
free((void *)data);
data = NULL;
}
}
/**
* Convert a ccnx-scheme URI to a ccnb-encoded Name.
* The converted result is placed in c.
* On input, c may contain a base name, in which case relative URIs are allowed.
* Otherwise c should start out empty, and the URI must be absolute.
* @returns -1 if an error is found, otherwise returns the number of characters
* that were processed.
*/
int
ccn_name_from_uri(struct ccn_charbuf *c, const char *uri)
{
int res = 0;
struct ccn_charbuf *compbuf = NULL;
const char *stop = uri + strlen(uri);
const char *s = uri;
size_t cont = 0;
compbuf = ccn_charbuf_create();
if (compbuf == NULL) return(-1);
if (s[0] != '/') {
res = ccn_append_uri_component(compbuf, s, stop - s, &cont);
if (res < -2)
goto Done;
ccn_charbuf_reserve(compbuf, 1)[0] = 0;
if ((0 == strcasecmp((const char *)(compbuf->buf), "ccnx:") ||
0 == strcasecmp((const char *)(compbuf->buf), "ccn:")) &&
s[cont-1] == ':') {
s += cont;
cont = 0;
}
/// @bug XXX - need to error out on other uri schemes
}
if (s[0] == '/') {
ccn_name_init(c);
if (s[1] == '/') {
/* Skip over hostname part - not used in ccnx scheme */
s += 2;
compbuf->length = 0;
res = ccn_append_uri_component(compbuf, s, stop - s, &cont);
if (res < 0 && res != -2)
goto Done;
s += cont; cont = 0;
}
}
while (s[0] != 0 && s[0] != '?' && s[0] != '#') {
if (s[0] == '/')
s++;
compbuf->length = 0;
res = ccn_append_uri_component(compbuf, s, stop - s, &cont);
s += cont; cont = 0;
if (res < -2)
goto Done;
if (res == -2) {
res = 0; /* process . or equiv in URI */
continue;
}
if (res == -1) {
/* process .. in URI - discard last name component */
res = ccn_name_last_component_offset(c->buf, c->length);
if (res < 0)
goto Done;
c->length = res;
ccn_charbuf_append_closer(c);
continue;
}
res = ccn_name_append(c, compbuf->buf, compbuf->length);
if (res < 0)
goto Done;
}
Done:
ccn_charbuf_destroy(&compbuf);
if (res < 0)
return(-1);
if (c->length < 2 || c->buf[c->length-1] != CCN_CLOSE)
return(-1);
return(s - uri);
}