static int
process_int_attribute(struct ccn_charbuf *interest, enum ccn_dtag tag,
PyObject *py_obj_Interest, const char *attr_name)
{
PyObject *py_attr;
int val, r;
r = is_attr_set(py_obj_Interest, attr_name, &py_attr);
if (r <= 0)
return r;
val = _pyccn_Int_AsLong(py_attr);
Py_DECREF(py_attr);
if (PyErr_Occurred())
return -1;
#if 0
r = ccn_charbuf_append_tt(interest, tag, CCN_DTAG);
JUMP_IF_NEG_MEM(r, error);
r = ccnb_append_number(interest, val);
JUMP_IF_NEG_MEM(r, error);
r = ccn_charbuf_append_closer(interest); /* </Tag> */
JUMP_IF_NEG_MEM(r, error);
#endif
r = ccnb_tagged_putf(interest, tag, "%d", val);
JUMP_IF_NEG_MEM(r, error);
return 1;
error:
return -1;
}
int
get_content_by_content_name(char *content_name, unsigned char **content_data,
char *orig_router)
{
int ret=-1;
struct ccn_charbuf *name = NULL;
struct ccn_charbuf *templ = NULL;
struct ccn_charbuf *resultbuf = NULL;
struct ccn_parsed_ContentObject pcobuf = { 0 };
int res;
int allow_stale = 1;
int content_only = 1;
int scope = -1;
const unsigned char *ptr,*ptr_in;
size_t length,length_in;
int resolve_version = CCN_V_HIGHEST;
int timeout_ms = 3000;
const unsigned lifetime_default = CCN_INTEREST_LIFETIME_SEC << 12;
unsigned lifetime_l12 = lifetime_default;
int get_flags = 0;
name = ccn_charbuf_create();
res = ccn_name_from_uri(name,content_name);
if (res < 0) {
fprintf(stderr, "Bad ccn URI: %s\n", content_name);
ccn_charbuf_destroy(&name);
return ret;
}
if (allow_stale || lifetime_l12 != lifetime_default || scope != -1) {
templ = ccn_charbuf_create();
ccn_charbuf_append_tt(templ, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(templ, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(templ); /* </Name> */
if (allow_stale) {
ccn_charbuf_append_tt(templ, CCN_DTAG_AnswerOriginKind, CCN_DTAG);
ccnb_append_number(templ,
CCN_AOK_DEFAULT | CCN_AOK_STALE);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
}
if (scope != -1) {
ccnb_tagged_putf(templ, CCN_DTAG_Scope, "%d", scope);
}
if (lifetime_l12 != lifetime_default) {
/*
* Choose the interest lifetime so there are at least 3
* expressions (in the unsatisfied case).
*/
unsigned char buf[3] = { 0 };
int i;
for (i = sizeof(buf) - 1; i >= 0; i--, lifetime_l12 >>= 8)
buf[i] = lifetime_l12 & 0xff;
ccnb_append_tagged_blob(templ, CCN_DTAG_InterestLifetime, buf,
sizeof(buf));
}
struct ccn_charbuf *
make_template(struct mydata *md, struct ccn_upcall_info *info)
{
struct ccn_charbuf *templ = ccn_charbuf_create();
ccnb_element_begin(templ, CCN_DTAG_Interest);
ccnb_element_begin(templ, CCN_DTAG_Name);
ccnb_element_end(templ); /* </Name> */
// XXX - use pubid if possible
ccnb_element_begin(templ, CCN_DTAG_MaxSuffixComponents);
ccnb_append_number(templ, 1);
ccnb_element_end(templ); /* </MaxSuffixComponents> */
if (md->allow_stale) {
ccnb_element_begin(templ, CCN_DTAG_AnswerOriginKind);
ccnb_append_number(templ, CCN_AOK_DEFAULT | CCN_AOK_STALE);
ccnb_element_end(templ); /* </AnswerOriginKind> */
}
ccnb_element_end(templ); /* </Interest> */
return(templ);
}
struct ccn_charbuf *
make_template(struct mydata *md)
{
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> */
// XXX - use pubid if possible
ccn_charbuf_append_tt(templ, CCN_DTAG_MaxSuffixComponents, CCN_DTAG);
ccnb_append_number(templ, 1);
ccn_charbuf_append_closer(templ); /* </MaxSuffixComponents> */
if (md->allow_stale) {
ccn_charbuf_append_tt(templ, CCN_DTAG_AnswerOriginKind, CCN_DTAG);
ccnb_append_number(templ, CCN_AOK_DEFAULT | CCN_AOK_STALE);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
}
ccn_charbuf_append_closer(templ); /* </Interest> */
return(templ);
}
/**
* Creates a template for ccn interest fetch
*
* @param allow_stale
* @param scope
*/
struct ccn_charbuf* CCNGet::make_template(int allow_stale, int scope)
{
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_MaxSuffixComponents, CCN_DTAG);
ccnb_append_number(templ, 1);
ccn_charbuf_append_closer(templ); /* </MaxSuffixComponents> */
if (allow_stale) {
ccn_charbuf_append_tt(templ, CCN_DTAG_AnswerOriginKind, CCN_DTAG);
ccnb_append_number(templ, CCN_AOK_DEFAULT | CCN_AOK_STALE);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
}
if (scope >= 0 && scope <= 2) {
ccnb_tagged_putf(templ, CCN_DTAG_Scope, "%d", scope);
}
ccn_charbuf_append_closer(templ); /* </Interest> */
return(templ);
}
static struct ccn_charbuf *
make_data_template(int maxSuffix) {
// creates a template for interests that only have a name
// and a segment number
struct ccn_charbuf *cb = ccn_charbuf_create();
ccn_charbuf_append_tt(cb, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(cb, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(cb); /* </Name> */
ccn_charbuf_append_tt(cb, CCN_DTAG_MaxSuffixComponents, CCN_DTAG);
ccnb_append_number(cb, maxSuffix);
ccn_charbuf_append_closer(cb); /* </MaxSuffixComponents> */
ccn_charbuf_append_closer(cb); /* </Interest> */
return(cb);
}
struct ccn_charbuf *
make_connect_template()
{
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_ChildSelector, CCN_DTAG);
ccnb_append_number(templ,1);
ccn_charbuf_append_closer(templ);
ccn_charbuf_append_closer(templ); /* </Interest> */
return templ;
}
struct ccn_charbuf *make_template(int allow_caching) {
if (!allow_caching) {
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, CCN_AOK_NEW);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
ccn_charbuf_append_closer(templ); /* </Interest> */
return(templ);
}
return NULL;
}
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 *templ = NULL;
struct ccn_charbuf *resultbuf = NULL;
const char *arg = NULL;
struct ccn_parsed_ContentObject pcobuf = { 0 };
int res;
char ch;
int allow_stale = 0;
int content_only = 0;
const unsigned char *ptr;
size_t length;
int resolve_version = 0;
const char *env_timeout = getenv("CCN_LINGER");
int timeout_ms = 3000;
while ((ch = getopt(argc, argv, "hacv")) != -1) {
switch (ch) {
case 'a':
allow_stale = 1;
break;
case 'c':
content_only = 1;
break;
case 'v':
if (resolve_version == 0)
resolve_version = CCN_V_HIGHEST;
else
resolve_version = CCN_V_HIGH;
break;
case 'h':
default:
usage(argv[0]);
}
}
arg = argv[optind];
if (arg == NULL)
usage(argv[0]);
name = ccn_charbuf_create();
res = ccn_name_from_uri(name, arg);
if (res < 0) {
fprintf(stderr, "%s: bad ccn URI: %s\n", argv[0], arg);
exit(1);
}
if (argv[optind + 1] != NULL)
fprintf(stderr, "%s warning: extra arguments ignored\n", argv[0]);
h = ccn_create();
res = ccn_connect(h, NULL);
if (res < 0) {
ccn_perror(h, "ccn_connect");
exit(1);
}
if (res < 0) {
fprintf(stderr, "%s: bad ccn URI: %s\n", argv[0], arg);
exit(1);
}
if (env_timeout != NULL && (res = atoi(env_timeout)) > 0) {
timeout_ms = res * 1000;
}
if (allow_stale || env_timeout != NULL) {
templ = ccn_charbuf_create();
ccn_charbuf_append_tt(templ, CCN_DTAG_Interest, CCN_DTAG);
ccn_charbuf_append_tt(templ, CCN_DTAG_Name, CCN_DTAG);
ccn_charbuf_append_closer(templ); /* </Name> */
if (allow_stale) {
ccn_charbuf_append_tt(templ, CCN_DTAG_AnswerOriginKind, CCN_DTAG);
ccnb_append_number(templ,
CCN_AOK_DEFAULT | CCN_AOK_STALE);
ccn_charbuf_append_closer(templ); /* </AnswerOriginKind> */
}
if (env_timeout != NULL) {
/*
* Choose the interest lifetime so there are at least 3
* expressions (in the unsatisfied case).
*/
unsigned char buf[3] = { 0 };
unsigned lifetime;
int i;
if (timeout_ms > 60000)
lifetime = 30 << 12;
else {
lifetime = timeout_ms * 2 / 5 * 4096 / 1000;
}
for (i = sizeof(buf) - 1; i >= 0; i--, lifetime >>= 8)
buf[i] = lifetime & 0xff;
ccnb_append_tagged_blob(templ, CCN_DTAG_InterestLifetime, buf, sizeof(buf));
}
