static void
rndc_connected(isc_task_t *task, isc_event_t *event) {
char socktext[ISC_SOCKADDR_FORMATSIZE];
isc_socketevent_t *sevent = (isc_socketevent_t *)event;
isccc_sexpr_t *request = NULL;
isccc_sexpr_t *data;
isccc_time_t now;
isccc_region_t message;
isc_region_t r;
isc_uint32_t len;
isc_buffer_t b;
isc_result_t result;
connects--;
if (sevent->result != ISC_R_SUCCESS) {
isc_sockaddr_format(&serveraddrs[currentaddr], socktext,
sizeof(socktext));
if (sevent->result != ISC_R_CANCELED &&
++currentaddr < nserveraddrs)
{
notify("connection failed: %s: %s", socktext,
isc_result_totext(sevent->result));
isc_socket_detach(&sock);
isc_event_free(&event);
rndc_startconnect(&serveraddrs[currentaddr], task);
return;
} else
fatal("connect failed: %s: %s", socktext,
isc_result_totext(sevent->result));
}
isc_stdtime_get(&now);
DO("create message", isccc_cc_createmessage(1, NULL, NULL, ++serial,
now, now + 60, &request));
data = isccc_alist_lookup(request, "_data");
if (data == NULL)
fatal("_data section missing");
if (isccc_cc_definestring(data, "type", "null") == NULL)
fatal("out of memory");
message.rstart = databuf + 4;
message.rend = databuf + sizeof(databuf);
DO("render message", isccc_cc_towire(request, &message, &secret));
len = sizeof(databuf) - REGION_SIZE(message);
isc_buffer_init(&b, databuf, 4);
isc_buffer_putuint32(&b, len - 4);
r.length = len;
r.base = databuf;
isccc_ccmsg_init(mctx, sock, &ccmsg);
isccc_ccmsg_setmaxsize(&ccmsg, 1024 * 1024);
DO("schedule recv", isccc_ccmsg_readmessage(&ccmsg, task,
rndc_recvnonce, NULL));
recvs++;
DO("send message", isc_socket_send(sock, &r, task, rndc_senddone,
NULL));
sends++;
isc_event_free(&event);
}
isc_result_t
isccc_cc_createresponse(isccc_sexpr_t *message, isccc_time_t now,
isccc_time_t expires, isccc_sexpr_t **alistp)
{
char *_frm, *_to, *type = NULL;
isc_uint32_t serial;
isccc_sexpr_t *alist, *_ctrl, *_data;
isc_result_t result;
REQUIRE(alistp != NULL && *alistp == NULL);
_ctrl = isccc_alist_lookup(message, "_ctrl");
_data = isccc_alist_lookup(message, "_data");
if (!isccc_alist_alistp(_ctrl) || !isccc_alist_alistp(_data) ||
isccc_cc_lookupuint32(_ctrl, "_ser", &serial) != ISC_R_SUCCESS ||
isccc_cc_lookupstring(_data, "type", &type) != ISC_R_SUCCESS)
return (ISC_R_FAILURE);
/*
* _frm and _to are optional.
*/
_frm = NULL;
(void)isccc_cc_lookupstring(_ctrl, "_frm", &_frm);
_to = NULL;
(void)isccc_cc_lookupstring(_ctrl, "_to", &_to);
/*
* Create the response.
*/
alist = NULL;
result = isccc_cc_createmessage(1, _to, _frm, serial, now, expires,
&alist);
if (result != ISC_R_SUCCESS)
return (result);
_ctrl = isccc_alist_lookup(alist, "_ctrl");
if (_ctrl == NULL) {
result = ISC_R_FAILURE;
goto bad;
}
_data = isccc_alist_lookup(alist, "_data");
if (_data == NULL) {
result = ISC_R_FAILURE;
goto bad;
}
if (isccc_cc_definestring(_ctrl, "_rpl", "1") == NULL ||
isccc_cc_definestring(_data, "type", type) == NULL)
{
result = ISC_R_NOMEMORY;
goto bad;
}
*alistp = alist;
return (ISC_R_SUCCESS);
bad:
isccc_sexpr_free(&alist);
return (result);
}
static void
rndc_recvnonce(isc_task_t *task, isc_event_t *event) {
isccc_sexpr_t *response = NULL;
isccc_sexpr_t *_ctrl;
isccc_region_t source;
isc_result_t result;
isc_uint32_t nonce;
isccc_sexpr_t *request = NULL;
isccc_time_t now;
isc_region_t r;
isccc_sexpr_t *data;
isccc_region_t message;
isc_uint32_t len;
isc_buffer_t b;
recvs--;
if (ccmsg.result == ISC_R_EOF)
fatal("connection to remote host closed\n"
"This may indicate that the remote server is using "
"an older version of \n"
"the command protocol, this host is not authorized "
"to connect,\nor the key is invalid.");
if (ccmsg.result != ISC_R_SUCCESS)
fatal("recv failed: %s", isc_result_totext(ccmsg.result));
source.rstart = isc_buffer_base(&ccmsg.buffer);
source.rend = isc_buffer_used(&ccmsg.buffer);
DO("parse message", isccc_cc_fromwire(&source, &response, &secret));
_ctrl = isccc_alist_lookup(response, "_ctrl");
if (_ctrl == NULL)
fatal("_ctrl section missing");
nonce = 0;
if (isccc_cc_lookupuint32(_ctrl, "_nonce", &nonce) != ISC_R_SUCCESS)
nonce = 0;
isc_stdtime_get(&now);
DO("create message", isccc_cc_createmessage(1, NULL, NULL, ++serial,
now, now + 60, &request));
data = isccc_alist_lookup(request, "_data");
if (data == NULL)
fatal("_data section missing");
if (isccc_cc_definestring(data, "type", args) == NULL)
fatal("out of memory");
if (nonce != 0) {
_ctrl = isccc_alist_lookup(request, "_ctrl");
if (_ctrl == NULL)
fatal("_ctrl section missing");
if (isccc_cc_defineuint32(_ctrl, "_nonce", nonce) == NULL)
fatal("out of memory");
}
message.rstart = databuf + 4;
message.rend = databuf + sizeof(databuf);
DO("render message", isccc_cc_towire(request, &message, &secret));
len = sizeof(databuf) - REGION_SIZE(message);
isc_buffer_init(&b, databuf, 4);
isc_buffer_putuint32(&b, len - 4);
r.length = len;
r.base = databuf;
isccc_ccmsg_cancelread(&ccmsg);
DO("schedule recv", isccc_ccmsg_readmessage(&ccmsg, task,
rndc_recvdone, NULL));
recvs++;
DO("send message", isc_socket_send(sock, &r, task, rndc_senddone,
NULL));
sends++;
isc_event_free(&event);
isccc_sexpr_free(&response);
return;
}
static void
rndc_recvnonce(isc_task_t *task, isc_event_t *event) {
isccc_sexpr_t *response = NULL;
isccc_sexpr_t *_ctrl;
isccc_region_t source;
isc_result_t result;
isc_uint32_t nonce;
isccc_sexpr_t *request = NULL;
isccc_time_t now;
isc_region_t r;
isccc_sexpr_t *data;
isc_buffer_t b;
recvs--;
if (ccmsg.result == ISC_R_EOF)
fatal("connection to remote host closed\n"
"This may indicate that\n"
"* the remote server is using an older version of"
" the command protocol,\n"
"* this host is not authorized to connect,\n"
"* the clocks are not synchronized,\n"
"* the key signing algorithm is incorrect, or\n"
"* the key is invalid.");
if (ccmsg.result != ISC_R_SUCCESS)
fatal("recv failed: %s", isc_result_totext(ccmsg.result));
source.rstart = isc_buffer_base(&ccmsg.buffer);
source.rend = isc_buffer_used(&ccmsg.buffer);
DO("parse message",
isccc_cc_fromwire(&source, &response, algorithm, &secret));
_ctrl = isccc_alist_lookup(response, "_ctrl");
if (!isccc_alist_alistp(_ctrl))
fatal("bad or missing ctrl section in response");
nonce = 0;
if (isccc_cc_lookupuint32(_ctrl, "_nonce", &nonce) != ISC_R_SUCCESS)
nonce = 0;
isc_stdtime_get(&now);
DO("create message", isccc_cc_createmessage(1, NULL, NULL, ++serial,
now, now + 60, &request));
data = isccc_alist_lookup(request, "_data");
if (data == NULL)
fatal("_data section missing");
if (isccc_cc_definestring(data, "type", args) == NULL)
fatal("out of memory");
if (nonce != 0) {
_ctrl = isccc_alist_lookup(request, "_ctrl");
if (_ctrl == NULL)
fatal("_ctrl section missing");
if (isccc_cc_defineuint32(_ctrl, "_nonce", nonce) == NULL)
fatal("out of memory");
}
isc_buffer_clear(databuf);
/* Skip the length field (4 bytes) */
isc_buffer_add(databuf, 4);
DO("render message",
isccc_cc_towire(request, &databuf, algorithm, &secret));
isc_buffer_init(&b, databuf->base, 4);
isc_buffer_putuint32(&b, databuf->used - 4);
r.base = databuf->base;
r.length = databuf->used;
isccc_ccmsg_cancelread(&ccmsg);
DO("schedule recv", isccc_ccmsg_readmessage(&ccmsg, task,
rndc_recvdone, NULL));
recvs++;
DO("send message", isc_socket_send(sock, &r, task, rndc_senddone,
NULL));
sends++;
isc_event_free(&event);
isccc_sexpr_free(&response);
return;
}
