/**
* 劈开ndnb名字,并把各个部分(n个)放到 components 中.
* 貌似c会被修改. components 可以直接传null,即无所谓.
* 参数:
* c => 输入的 ndnb 名字
* components => 输出
* n => 需要留下的组件的数量. 负数代表需要remove的数量
*
* Chop the name down to n components.
* @param c contains a ndnb-encoded Name
* @param components may be NULL; if provided it must be consistent with
* some prefix of the name, and is updated accordingly.
* @param n is the number or components to leave, or, if negative, specifies
* how many components to remove,
e.g. -1 will remove just the last component.
* @returns -1 for error, otherwise the new number of Components
*/
int
ndn_name_chop(struct ndn_charbuf *c, struct ndn_indexbuf *components, int n)
{
if (components == NULL) {
int res;
components = ndn_indexbuf_create();
if (components == NULL)
return(-1);
res = ndn_name_split(c, components);
if (res >= 0)
res = ndn_name_chop(c, components, n);
ndn_indexbuf_destroy(&components);
return(res);
}
/* Fix up components if needed. We could be a little smarter about this. */
if (components->n == 0 || components->buf[components->n-1] + 1 != c->length)
if (ndn_name_split(c, components) < 0)
return(-1);
if (n < 0)
n += (components->n - 1); /* APL-style indexing */
if (n < 0)
return(-1);
if (n < components->n) {
c->length = components->buf[n];
ndn_charbuf_append_value(c, NDN_CLOSE, 1);
components->n = n + 1;
return(n);
}
return(-1);
}
/**
* should probably return a new cob, rather than reusing one.
* should publish link as:
* NDNRID_POLICY_URI("ndn:/%C1.M.S.localhost/%C1.M.SRV/repository/POLICY)/%C1.M.K--pubid--/--version--/%00
* should have key locator which is the key name of the repository
*/
PUBLIC struct ndn_charbuf *
ndnr_init_policy_link_cob(struct ndnr_handle *ndnr, struct ndn *h,
struct ndn_charbuf *targetname)
{
struct ndn_signing_params sp = NDN_SIGNING_PARAMS_INIT;
struct ndn_charbuf *name = ndn_charbuf_create();
struct ndn_charbuf *pubid = ndn_charbuf_create();
struct ndn_charbuf *pubkey = ndn_charbuf_create();
struct ndn_charbuf *keyid = ndn_charbuf_create();
struct ndn_charbuf *content = ndn_charbuf_create();
struct ndn_charbuf *cob = ndn_charbuf_create();
struct ndn_charbuf *answer = NULL;
int res;
res = ndn_get_public_key(h, NULL, pubid, pubkey);
if (res < 0)
goto Bail;
if (ndn_name_from_uri(name, NDNRID_POLICY_URI) < 0)
goto Bail;
res |= ndn_charbuf_append_value(keyid, NDN_MARKER_CONTROL, 1);
res |= ndn_charbuf_append_string(keyid, ".M.K");
res |= ndn_charbuf_append_value(keyid, 0, 1);
res |= ndn_charbuf_append_charbuf(keyid, pubid);
res |= ndn_name_append(name, keyid->buf, keyid->length);
res |= ndn_create_version(h, name, NDN_V_NOW, 0, 0);
if (ndn_name_from_uri(name, "%00") < 0)
goto Bail;
sp.sp_flags |= NDN_SP_FINAL_BLOCK;
sp.type = NDN_CONTENT_LINK;
res |= ndnb_append_Link(content, targetname, "Repository Policy", NULL);
if (res != 0)
goto Bail;
res |= ndn_sign_content(h, cob, name, &sp, content->buf, content->length);
if (res != 0)
goto Bail;
answer = cob;
cob = NULL;
Bail:
ndn_charbuf_destroy(&name);
ndn_charbuf_destroy(&pubid);
ndn_charbuf_destroy(&pubkey);
ndn_charbuf_destroy(&keyid);
ndn_charbuf_destroy(&content);
ndn_charbuf_destroy(&cob);
return (answer);
}
/**
* Advance the last Component of a Name to the next possible value.
* @param c contains a ndnb-encoded Name to be updated.
* @returns -1 for error, otherwise the number of Components
*/
int
ndn_name_next_sibling(struct ndn_charbuf *c)
{
int res = -1;
struct ndn_indexbuf *ndx;
unsigned char *lastcomp = NULL;
size_t lastcompsize = 0;
size_t i;
int carry;
struct ndn_charbuf *newcomp;
ndx = ndn_indexbuf_create();
if (ndx == NULL) goto Finish;
res = ndn_name_split(c, ndx);
if (res <= 0) {
res = -1;
goto Finish;
}
res = ndn_ref_tagged_BLOB(NDN_DTAG_Component, c->buf,
ndx->buf[res-1], ndx->buf[res],
(const unsigned char **)&lastcomp,
&lastcompsize);
if (res < 0) goto Finish;
for (carry = 1, i = lastcompsize; carry && i > 0; i--) {
carry = (((++lastcomp[i-1]) & 0xFF) == 0x00);
}
if (carry) {
newcomp = ndn_charbuf_create();
res |= ndn_charbuf_append_value(newcomp, 0, 1);
res |= ndn_charbuf_append(newcomp, lastcomp, lastcompsize);
res |= ndn_name_chop(c, ndx, ndx->n - 2);
res |= ndn_name_append(c, newcomp->buf, newcomp->length);
ndn_charbuf_destroy(&newcomp);
if (res < 0) goto Finish;
}
res = ndx->n - 1;
Finish:
ndn_indexbuf_destroy(&ndx);
return(res);
}
/**
* Parse the buffered configuration found in config
*
* The pass argument controls what is done with the result:
* 0 - silent check for syntax errors;
* 1 - check for syntax errors and warnings, logging the results,
* 2 - incorporate settings into environ.
*
* @returns -1 if an error is found, otherwise the count of warnings.
*/
int
r_init_parse_config(struct ndnr_handle *h, struct ndn_charbuf *config, int pass)
{
struct ndn_charbuf *key = NULL;
struct ndn_charbuf *value = NULL;
const unsigned char *b;
int line;
size_t i;
size_t sol; /* start of line */
size_t len; /* config->len */
size_t ndx; /* temp for column report*/
int ch;
int warns = 0;
int errors = 0;
int use_it = 0;
static const char pclegal[] =
"~@%-+=:,./[]"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"_"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const char *klegal = strchr(pclegal, 'a');
int flags; /* for reporting */
b = config->buf;
len = config->length;
if (len == 0)
return(0);
ndn_charbuf_as_string(config);
key = ndn_charbuf_create();
value = ndn_charbuf_create();
if (key == NULL || value == NULL)
return(-1);
/* Ensure there is null termination in the buffered config */
if (ndn_charbuf_as_string(config) == NULL)
return(-1);
for (line = 1, i = 0, ch = b[0], sol = 0; i < len;) {
flags = pass;
use_it = 0;
if (ch > ' ' && ch != '#') {
key->length = value->length = 0;
/* parse key */
while (i < len && ch != '\n' && ch != '=') {
ndn_charbuf_append_value(key, ch, 1);
ch = b[++i];
}
if (ch == '=')
ch = b[++i];
else {
r_init_config_msg(h, flags, line, key->length, "missing '='");
flags |= NDNR_CONFIG_IGNORELINE;
warns++;
ch = '\n';
}
/* parse value */
while (i < len && ch > ' ') {
ndn_charbuf_append_value(value, ch, 1);
ch = b[++i];
}
/* See if it might be one of ours */
if (key->length < 5 || (memcmp(key->buf, "NDNR_", 5) != 0 &&
memcmp(key->buf, "NDNS_", 5) != 0)) {
r_init_config_msg(h, flags, line, 0,
"ignoring unrecognized key");
flags |= NDNR_CONFIG_IGNORELINE;
warns++;
use_it = 0;
}
else
use_it = 1;
/* Check charset of key */
ndx = strspn(ndn_charbuf_as_string(key), klegal);
if (ndx != key->length) {
errors += use_it;
r_init_config_msg(h, (flags | NDNR_CONFIG_ERR), line, ndx,
"unexpected character in key");
flags |= NDNR_CONFIG_IGNORELINE;
warns++;
}
/* Check charset of value */
ndx = strspn(ndn_charbuf_as_string(value), pclegal);
if (ndx != value->length) {
errors += use_it;
r_init_config_msg(h, (flags | NDNR_CONFIG_ERR),
line, key->length + 1 + ndx,
"unexpected character in value");
flags |= NDNR_CONFIG_IGNORELINE;
warns++;
}
}
if (ch == '#') {
/* a comment line or error recovery. */
while (i < len && ch != '\n')
ch = b[++i];
}
while (i < len && ch <= ' ') {
if (ch == '\n') {
line++;
sol = i;
break;
}
if (memchr("\r\t ", ch, 3) == NULL) {
r_init_config_msg(h, pass, line, i - sol,
"non-whitespace control char at end of line");
warns++;
}
ch = b[++i];
}
if (i == len) {
r_init_config_msg(h, flags, line, i - sol,
"missing newline at end of file");
warns++;
ch = '\n';
}
else if (ch == '\n')
ch = b[++i];
else {
r_init_config_msg(h, flags, line, i - sol, "junk at end of line");
flags |= NDNR_CONFIG_IGNORELINE;
warns++;
ch = '#';
}
if (flags == 0 && strcmp(ndn_charbuf_as_string(key), "NDNR_DEBUG") == 0) {
/* Set this on pass 0 so that it takes effect sooner. */
h->debug = 1;
setenv("NDNR_DEBUG", ndn_charbuf_as_string(value), 1);
h->debug = r_init_debug_getenv(h, "NDNR_DEBUG");
}
if (pass == 2 && use_it) {
if (NDNSHOULDLOG(h, mmm, NDNL_FINEST))
ndnr_msg(h, "config: %s=%s",
ndn_charbuf_as_string(key),
ndn_charbuf_as_string(value));
setenv(ndn_charbuf_as_string(key), ndn_charbuf_as_string(value), 1);
}
}
ndn_charbuf_destroy(&key);
ndn_charbuf_destroy(&value);
return(errors ? -1 : warns);
}
