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Make return code from router_add_to_routerlist a nice sensible enum. Based on patch from Sebastian.

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svn:r17656
This commit is contained in:
Nick Mathewson 2008-12-17 21:50:01 +00:00
parent 43393b4b33
commit 33e2053ebc
6 changed files with 110 additions and 57 deletions
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44
src/or/directory.c
View File

@ -3061,34 +3061,34 @@ directory_handle_command_post(dir_connection_t *conn, const char *headers,
if (authdir_mode_handles_descs(options, -1) &&
!strcmp(url,"/tor/")) { /* server descriptor post */
const char *msg = NULL;
const char *msg = "[None]";
uint8_t purpose = authdir_mode_bridge(options) ?
ROUTER_PURPOSE_BRIDGE : ROUTER_PURPOSE_GENERAL;
int r = dirserv_add_multiple_descriptors(body, purpose,
was_router_added_t r = dirserv_add_multiple_descriptors(body, purpose,
conn->_base.address, &msg);
tor_assert(msg);
if (r > 0)
if (WRA_WAS_ADDED(r))
dirserv_get_directory(); /* rebuild and write to disk */
switch (r) {
case -1:
log_notice(LD_DIRSERV,
"Rejected router descriptor or extra-info from %s "
"(\"%s\").",
conn->_base.address, msg);
/* fall through */
case 1:
/* malformed descriptor, or something wrong */
write_http_status_line(conn, 400, msg);
break;
case 0: /* accepted but discarded */
write_http_response_header_impl(conn, -1, NULL, NULL,
"X-Descriptor-Not-New: Yes\r\n", -1);
break;
case 2: /* accepted */
write_http_status_line(conn, 200, msg);
break;
if (r == ROUTER_ADDED_NOTIFY_GENERATOR) {
/* Accepted with a message. */
log_info(LD_DIRSERV,
"Problematic router descriptor or extra-info from %s "
"(\"%s\").",
conn->_base.address, msg);
write_http_status_line(conn, 400, msg);
} else if (r == ROUTER_ADDED_SUCCESSFULLY) {
write_http_status_line(conn, 200, msg);
} else if (WRA_WAS_OUTDATED(r)) {
write_http_response_header_impl(conn, -1, NULL, NULL,
"X-Descriptor-Not-New: Yes\r\n", -1);
} else {
log_info(LD_DIRSERV,
"Rejected router descriptor or extra-info from %s "
"(\"%s\").",
conn->_base.address, msg);
write_http_status_line(conn, 400, msg);
}
goto done;
}
if (options->HSAuthoritativeDir &&

38
src/or/dirserv.c
View File

@ -564,14 +564,27 @@ authdir_wants_to_reject_router(routerinfo_t *ri, const char **msg,
return 0;
}
/** True iff <b>a</b> is more severe than <b>b</b> */
static int
WRA_MORE_SEVERE(was_router_added_t a, was_router_added_t b)
{
if (b == ROUTER_ADDED_SUCCESSFULLY) {
return a;
} else if (b == ROUTER_ADDED_NOTIFY_GENERATOR) {
return !WRA_WAS_ADDED(a);
} else {
return a < b;
}
}
/** As for dirserv_add_descriptor, but accepts multiple documents, and
* returns the most severe error that occurred for any one of them. */
int
was_router_added_t
dirserv_add_multiple_descriptors(const char *desc, uint8_t purpose,
const char *source,
const char **msg)
{
int r=100; /* higher than any actual return value. */
int r=ROUTER_ADDED_NOTIFY_GENERATOR; /* highest possible return value. */
int r_tmp;
const char *msg_out;
smartlist_t *list;
@ -603,7 +616,7 @@ dirserv_add_multiple_descriptors(const char *desc, uint8_t purpose,
msg_out = NULL;
tor_assert(ri->purpose == purpose);
r_tmp = dirserv_add_descriptor(ri, &msg_out);
if (r_tmp < r) {
if (WRA_MORE_SEVERE(r_tmp, r)) {
r = r_tmp;
*msg = msg_out;
}
@ -619,7 +632,7 @@ dirserv_add_multiple_descriptors(const char *desc, uint8_t purpose,
msg_out = NULL;
r_tmp = dirserv_add_extrainfo(ei, &msg_out);
if (r_tmp < r) {
if (WRA_MORE_SEVERE(r_tmp, r)) {
r = r_tmp;
*msg = msg_out;
}
@ -638,25 +651,27 @@ dirserv_add_multiple_descriptors(const char *desc, uint8_t purpose,
}
}
return r <= 2 ? r : 2;
return r;
}
/** Examine the parsed server descriptor in <b>ri</b> and maybe insert it into
* the list of server descriptors. Set *<b>msg</b> to a message that should be
* passed back to the origin of this descriptor.
*
* Return 2 if descriptor is well-formed and accepted;
* 1 if well-formed and accepted but origin should hear *msg;
* 0 if well-formed but redundant with one we already have;
* -1 if it is rejected and origin should hear *msg;
*
* This function is only called when fresh descriptors are posted, not when
* we re-load the cache.
*/
int
was_router_added_t
dirserv_add_descriptor(routerinfo_t *ri, const char **msg)
{
int r;
was_router_added_t r;
routerinfo_t *ri_old;
char *desc = NULL;
size_t desclen = 0;
@ -703,11 +718,12 @@ dirserv_add_descriptor(routerinfo_t *ri, const char **msg)
desc = tor_strndup(ri->cache_info.signed_descriptor_body, desclen);
}
if ((r = router_add_to_routerlist(ri, msg, 0, 0))<0) {
if (r < -1 && desc) /* unless the routerinfo was fine, just out-of-date */
r = router_add_to_routerlist(ri, msg, 0, 0);
if (!WRA_WAS_ADDED(r)) {
/* unless the routerinfo was fine, just out-of-date */
if (WRA_WAS_REJECTED(r) && desc)
control_event_or_authdir_new_descriptor("REJECTED", desc, desclen, *msg);
tor_free(desc);
return r == -1 ? 0 : -1;
} else {
smartlist_t *changed;
control_event_or_authdir_new_descriptor("ACCEPTED", desc, desclen, *msg);
@ -721,8 +737,8 @@ dirserv_add_descriptor(routerinfo_t *ri, const char **msg)
"Descriptor for invalid server accepted";
}
tor_free(desc);
return r == 0 ? 2 : 1;
}
return r;
}
/** As dirserv_add_descriptor, but for an extrainfo_t <b>ei</b>. */

43
src/or/or.h
View File

@ -3410,10 +3410,12 @@ int dirserv_add_own_fingerprint(const char *nickname, crypto_pk_env_t *pk);
int dirserv_load_fingerprint_file(void);
void dirserv_free_fingerprint_list(void);
const char *dirserv_get_nickname_by_digest(const char *digest);
int dirserv_add_multiple_descriptors(const char *desc, uint8_t purpose,
enum was_router_added_t dirserv_add_multiple_descriptors(
const char *desc, uint8_t purpose,
const char *source,
const char **msg);
int dirserv_add_descriptor(routerinfo_t *ri, const char **msg);
enum was_router_added_t dirserv_add_descriptor(routerinfo_t *ri,
const char **msg);
int getinfo_helper_dirserv_unregistered(control_connection_t *conn,
const char *question, char **answer);
void dirserv_free_descriptors(void);
@ -4388,8 +4390,41 @@ void routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old);
void routerlist_free_all(void);
void routerlist_reset_warnings(void);
void router_set_status(const char *digest, int up);
int router_add_to_routerlist(routerinfo_t *router, const char **msg,
int from_cache, int from_fetch);
/** Return value for router_add_to_routerlist() and dirserv_add_descriptor() */
typedef enum was_router_added_t {
ROUTER_ADDED_SUCCESSFULLY = 0,
ROUTER_ADDED_NOTIFY_GENERATOR = 1,
ROUTER_WAS_NOT_NEW = -1,
ROUTER_NOT_IN_CONSENSUS = -2,
ROUTER_NOT_IN_CONSENSUS_OR_NETWORKSTATUS = -3,
ROUTER_AUTHDIR_REJECTS = -4,
} was_router_added_t;
static int WRA_WAS_ADDED(was_router_added_t s);
static int WRA_WAS_OUTDATED(was_router_added_t s);
static int WRA_WAS_REJECTED(was_router_added_t s);
/**DOCDOC*/
static INLINE int
WRA_WAS_ADDED(was_router_added_t s) {
return s == ROUTER_ADDED_SUCCESSFULLY || s == ROUTER_ADDED_NOTIFY_GENERATOR;
}
/**DOCDOC*/
static INLINE int WRA_WAS_OUTDATED(was_router_added_t s)
{
return (s == ROUTER_WAS_NOT_NEW ||
s == ROUTER_NOT_IN_CONSENSUS ||
s == ROUTER_NOT_IN_CONSENSUS_OR_NETWORKSTATUS);
}
/**DOCDOC*/
static INLINE int WRA_WAS_REJECTED(was_router_added_t s)
{
return (s == ROUTER_AUTHDIR_REJECTS);
}
was_router_added_t router_add_to_routerlist(routerinfo_t *router,
const char **msg,
int from_cache,
int from_fetch);
int router_add_extrainfo_to_routerlist(extrainfo_t *ei, const char **msg,
int from_cache, int from_fetch);
void routerlist_remove_old_routers(void);

2
src/or/router.c
View File

@ -541,7 +541,7 @@ init_keys(void)
log_err(LD_GENERAL,"Generated a routerinfo we couldn't parse.");
return -1;
}
if (dirserv_add_descriptor(ri, &m) < 0) {
if (!WRA_WAS_ADDED(dirserv_add_descriptor(ri, &m))) {
log_err(LD_GENERAL,"Unable to add own descriptor to directory: %s",
m?m:"<unknown error>");
return -1;

36
src/or/routerlist.c
View File

@ -2923,7 +2923,7 @@ router_set_status(const char *digest, int up)
* routers_update_status_from_consensus_networkstatus; subsequently, you
* should call router_rebuild_store and routerlist_descriptors_added.
*/
int
was_router_added_t
router_add_to_routerlist(routerinfo_t *router, const char **msg,
int from_cache, int from_fetch)
{
@ -2950,7 +2950,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
router->nickname);
*msg = "Router descriptor was not new.";
routerinfo_free(router);
return -1;
return ROUTER_WAS_NOT_NEW;
}
if (authdir) {
@ -2958,7 +2958,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
!from_cache && !from_fetch)) {
tor_assert(*msg);
routerinfo_free(router);
return -2;
return ROUTER_AUTHDIR_REJECTS;
}
authdir_believes_valid = router->is_valid;
} else if (from_fetch) {
@ -2979,7 +2979,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
signed_desc_append_to_journal(&router->cache_info,
&routerlist->desc_store);
routerlist_insert_old(routerlist, router);
return -1;
return ROUTER_NOT_IN_CONSENSUS_OR_NETWORKSTATUS;
}
}
@ -3013,7 +3013,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
&routerlist->desc_store);
routerlist_insert_old(routerlist, router);
*msg = "Skipping router descriptor: not in consensus.";
return -1;
return ROUTER_NOT_IN_CONSENSUS;
}
/* If we have a router with the same identity key, choose the newer one. */
@ -3031,7 +3031,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
&routerlist->desc_store);
routerlist_insert_old(routerlist, router);
*msg = "Router descriptor was not new.";
return -1;
return ROUTER_WAS_NOT_NEW;
} else {
/* Same key, and either new, or listed in the consensus. */
log_debug(LD_DIR, "Replacing entry for router '%s/%s' [%s]",
@ -3052,7 +3052,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
*msg = authdir_believes_valid ? "Valid server updated" :
("Invalid server updated. (This dirserver is marking your "
"server as unapproved.)");
return 0;
return ROUTER_ADDED_SUCCESSFULLY;
}
}
@ -3063,7 +3063,7 @@ router_add_to_routerlist(routerinfo_t *router, const char **msg,
signed_desc_append_to_journal(&router->cache_info,
&routerlist->desc_store);
directory_set_dirty();
return 0;
return ROUTER_ADDED_SUCCESSFULLY;
}
/** Insert <b>ei</b> into the routerlist, or free it. Other arguments are
@ -3390,7 +3390,7 @@ router_load_single_router(const char *s, uint8_t purpose, int cache,
const char **msg)
{
routerinfo_t *ri;
int r;
was_router_added_t r;
smartlist_t *lst;
char annotation_buf[ROUTER_ANNOTATION_BUF_LEN];
tor_assert(msg);
@ -3420,10 +3420,11 @@ router_load_single_router(const char *s, uint8_t purpose, int cache,
smartlist_add(lst, ri);
routers_update_status_from_consensus_networkstatus(lst, 0);
if ((r=router_add_to_routerlist(ri, msg, 0, 0))<0) {
r = router_add_to_routerlist(ri, msg, 0, 0);
if (!WRA_WAS_ADDED(r)) {
/* we've already assigned to *msg now, and ri is already freed */
tor_assert(*msg);
if (r < -1)
if (r == ROUTER_AUTHDIR_REJECTS)
log_warn(LD_DIR, "Couldn't add router to list: %s Dropping.", *msg);
smartlist_free(lst);
return 0;
@ -3469,8 +3470,8 @@ router_load_routers_from_string(const char *s, const char *eos,
log_info(LD_DIR, "%d elements to add", smartlist_len(routers));
SMARTLIST_FOREACH(routers, routerinfo_t *, ri,
{
SMARTLIST_FOREACH_BEGIN(routers, routerinfo_t *, ri) {
was_router_added_t r;
if (requested_fingerprints) {
base16_encode(fp, sizeof(fp), descriptor_digests ?
ri->cache_info.signed_descriptor_digest :
@ -3491,13 +3492,14 @@ router_load_routers_from_string(const char *s, const char *eos,
}
}
if (router_add_to_routerlist(ri, &msg, from_cache, !from_cache) >= 0) {
r = router_add_to_routerlist(ri, &msg, from_cache, !from_cache);
if (WRA_WAS_ADDED(r)) {
any_changed = 1;
smartlist_add(changed, ri);
routerlist_descriptors_added(changed, from_cache);
smartlist_clear(changed);
}
});
} SMARTLIST_FOREACH_END(ri);
routerlist_assert_ok(routerlist);
@ -4182,14 +4184,14 @@ update_consensus_router_descriptor_downloads(time_t now)
smartlist_len(no_longer_old));
SMARTLIST_FOREACH(no_longer_old, signed_descriptor_t *, sd, {
const char *msg;
int r;
was_router_added_t r;
routerinfo_t *ri = routerlist_reparse_old(rl, sd);
if (!ri) {
log_warn(LD_BUG, "Failed to re-parse a router.");
continue;
}
r = router_add_to_routerlist(ri, &msg, 1, 0);
if (r == -1) {
if (WRA_WAS_OUTDATED(r)) {
log_warn(LD_DIR, "Couldn't add re-parsed router: %s",
msg?msg:"???");
}

4
src/or/test.c
View File

@ -2862,9 +2862,9 @@ test_dir_format(void)
r1->cache_info.published_on = time(NULL);
r2->cache_info.published_on = time(NULL)-3*60*60;
test_assert(router_dump_router_to_string(buf, 2048, r1, pk2)>0);
test_eq(dirserv_add_descriptor(buf,&m), 2);
test_eq(dirserv_add_descriptor(buf,&m), ROUTER_ADDED_NOTIFY_GENERATOR);
test_assert(router_dump_router_to_string(buf, 2048, r2, pk1)>0);
test_eq(dirserv_add_descriptor(buf,&m), 2);
test_eq(dirserv_add_descriptor(buf,&m), ROUTER_ADDED_NOTIFY_GENERATOR);
get_options()->Nickname = tor_strdup("DirServer");
test_assert(!dirserv_dump_directory_to_string(&cp,pk3, 0));
crypto_pk_get_digest(pk3, d);