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new GETINFO command to return list of listeners of a given type

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This commit is contained in:
Nick Mathewson 2011-05-02 16:44:37 -04:00
parent 28cc7b0180
commit c55c8f0d49
2 changed files with 63 additions and 2 deletions
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7
changes/feature3076
View File

@ -1,5 +1,8 @@
o Minor features
- The options SocksPort, ControlPort, and so on now all accept an
optional value "auto" that opens a socket on an OS-selected port.
o Minor features (controller)
- GETINFO net/listeners/(type) now returns a list of the addresses
and ports that are bound for listeners for a given connection
type. This is useful for if the user has selected SocksPort
"auto", and you need to know which port got chosen.

58
src/or/control.c
View File

@ -1407,6 +1407,63 @@ munge_extrainfo_into_routerinfo(const char *ri_body, signed_descriptor_t *ri,
return tor_strndup(ri_body, ri->signed_descriptor_len);
}
/** Implementation helper for GETINFO: answers requests for information about
* which ports are bound. */
static int
getinfo_helper_listeners(control_connection_t *control_conn,
const char *question,
char **answer, const char **errmsg)
{
int type;
smartlist_t *res;
(void)control_conn;
(void)errmsg;
if (!strcmp(question, "net/listeners/or"))
type = CONN_TYPE_OR_LISTENER;
else if (!strcmp(question, "net/listeners/dir"))
type = CONN_TYPE_DIR_LISTENER;
else if (!strcmp(question, "net/listeners/socks"))
type = CONN_TYPE_AP_LISTENER;
else if (!strcmp(question, "net/listeners/trans"))
type = CONN_TYPE_AP_TRANS_LISTENER;
else if (!strcmp(question, "net/listeners/natd"))
type = CONN_TYPE_AP_NATD_LISTENER;
else if (!strcmp(question, "net/listeners/dns"))
type = CONN_TYPE_AP_DNS_LISTENER;
else if (!strcmp(question, "net/listeners/control"))
type = CONN_TYPE_CONTROL_LISTENER;
else
return 0; /* unknown key */
res = smartlist_create();
SMARTLIST_FOREACH_BEGIN(get_connection_array(), connection_t *, conn) {
char *addr;
struct sockaddr_storage ss;
socklen_t ss_len = sizeof(ss);
if (conn->type != type || conn->marked_for_close || conn->s < 0)
continue;
if (getsockname(conn->s, (struct sockaddr *)&ss, &ss_len) < 0) {
tor_asprintf(&addr, "%s:%d", conn->address, (int)conn->port);
} else {
char *tmp = tor_sockaddr_to_str((struct sockaddr *)&ss);
addr = esc_for_log(tmp);
tor_free(tmp);
}
if (addr)
smartlist_add(res, addr);
} SMARTLIST_FOREACH_END(conn);
*answer = smartlist_join_strings(res, " ", 0, NULL);
SMARTLIST_FOREACH(res, char *, cp, tor_free(cp));
smartlist_free(res);
return 0;
}
/** Implementation helper for GETINFO: knows the answers for questions about
* directory information. */
static int
@ -1861,6 +1918,7 @@ static const getinfo_item_t getinfo_items[] = {
"All non-expired, non-superseded router descriptors."),
ITEM("desc/all-recent-extrainfo-hack", dir, NULL), /* Hack. */
PREFIX("extra-info/digest/", dir, "Extra-info documents by digest."),
PREFIX("net/listeners/", listeners, "Bound addresses by type"),
ITEM("ns/all", networkstatus,
"Brief summary of router status (v2 directory format)"),
PREFIX("ns/id/", networkstatus,