/**
* Generate list of all values as bracketed list.
* This string might be fed into cfg parser.
*
* Caller has to deallocate resulting output buffer.
*/
isc_result_t
fwd_print_bracketed_values_buf(isc_mem_t *mctx, ldap_valuelist_t *values,
isc_buffer_t **string) {
isc_result_t result;
ldap_value_t *value;
const char prefix[] = "{ ";
const char suffix[] = "}";
isc_buffer_t tmp_buf; /* hack: only the base buffer is allocated */
REQUIRE(string != NULL && *string == NULL);
isc_buffer_initnull(&tmp_buf);
tmp_buf.mctx = mctx;
buffer_append_str(&tmp_buf, prefix, 2);
for (value = HEAD(*values);
value != NULL && value->value != NULL;
value = NEXT(value, link)) {
buffer_append_str(&tmp_buf, value->value, strlen(value->value));
buffer_append_str(&tmp_buf, "; ", 2);
}
buffer_append_str(&tmp_buf, suffix, 2);
/* create and copy string from tmp to output buffer */
CHECK(isc_buffer_allocate(mctx, string, tmp_buf.used));
isc_buffer_putmem(*string, isc_buffer_base(&tmp_buf), tmp_buf.used);
cleanup:
if (tmp_buf.base != NULL)
isc_mem_put(mctx, tmp_buf.base, tmp_buf.length);
return result;
}
static void
isc_httpd_recvdone(isc_task_t *task, isc_event_t *ev) {
isc_region_t r;
isc_result_t result;
isc_httpd_t *httpd = ev->ev_arg;
isc_socketevent_t *sev = (isc_socketevent_t *)ev;
isc_httpdurl_t *url;
isc_time_t now;
char datebuf[32]; /* Only need 30, but safety first */
ENTER("recv");
INSIST(ISC_HTTPD_ISRECV(httpd));
if (sev->result != ISC_R_SUCCESS) {
NOTICE("recv destroying client");
destroy_client(&httpd);
goto out;
}
result = process_request(httpd, sev->n);
if (result == ISC_R_NOTFOUND) {
if (httpd->recvlen >= HTTP_RECVLEN - 1) {
destroy_client(&httpd);
goto out;
}
r.base = (unsigned char *)httpd->recvbuf + httpd->recvlen;
r.length = HTTP_RECVLEN - httpd->recvlen - 1;
/* check return code? */
(void)isc_socket_recv(httpd->sock, &r, 1, task,
isc_httpd_recvdone, httpd);
goto out;
} else if (result != ISC_R_SUCCESS) {
destroy_client(&httpd);
goto out;
}
ISC_HTTPD_SETSEND(httpd);
/*
* XXXMLG Call function here. Provide an add-header function
* which will append the common headers to a response we generate.
*/
isc_buffer_initnull(&httpd->bodybuffer);
isc_time_now(&now);
isc_time_formathttptimestamp(&now, datebuf, sizeof(datebuf));
url = ISC_LIST_HEAD(httpd->mgr->urls);
while (url != NULL) {
if (strcmp(httpd->url, url->url) == 0)
break;
url = ISC_LIST_NEXT(url, link);
}
if (url == NULL)
result = httpd->mgr->render_404(httpd->url, NULL,
httpd->querystring,
NULL, NULL,
&httpd->retcode,
&httpd->retmsg,
&httpd->mimetype,
&httpd->bodybuffer,
&httpd->freecb,
&httpd->freecb_arg);
else
result = url->action(httpd->url, url,
httpd->querystring,
httpd->headers,
url->action_arg,
&httpd->retcode, &httpd->retmsg,
&httpd->mimetype, &httpd->bodybuffer,
&httpd->freecb, &httpd->freecb_arg);
if (result != ISC_R_SUCCESS) {
result = httpd->mgr->render_500(httpd->url, url,
httpd->querystring,
NULL, NULL,
&httpd->retcode,
&httpd->retmsg,
&httpd->mimetype,
&httpd->bodybuffer,
&httpd->freecb,
&httpd->freecb_arg);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
}
isc_httpd_response(httpd);
isc_httpd_addheader(httpd, "Content-Type", httpd->mimetype);
isc_httpd_addheader(httpd, "Date", datebuf);
isc_httpd_addheader(httpd, "Expires", datebuf);
if (url != NULL && url->isstatic) {
char loadbuf[32];
isc_time_formathttptimestamp(&url->loadtime,
loadbuf, sizeof(loadbuf));
isc_httpd_addheader(httpd, "Last-Modified", loadbuf);
isc_httpd_addheader(httpd, "Cache-Control: public", NULL);
} else {
isc_httpd_addheader(httpd, "Last-Modified", datebuf);
isc_httpd_addheader(httpd, "Pragma: no-cache", NULL);
isc_httpd_addheader(httpd, "Cache-Control: no-cache", NULL);
}
isc_httpd_addheader(httpd, "Server: libisc", NULL);
isc_httpd_addheaderuint(httpd, "Content-Length",
isc_buffer_usedlength(&httpd->bodybuffer));
isc_httpd_endheaders(httpd); /* done */
ISC_LIST_APPEND(httpd->bufflist, &httpd->headerbuffer, link);
/*
* Link the data buffer into our send queue, should we have any data
* rendered into it. If no data is present, we won't do anything
* with the buffer.
*/
if (isc_buffer_length(&httpd->bodybuffer) > 0)
ISC_LIST_APPEND(httpd->bufflist, &httpd->bodybuffer, link);
/* check return code? */
(void)isc_socket_sendv(httpd->sock, &httpd->bufflist, task,
isc_httpd_senddone, httpd);
out:
isc_event_free(&ev);
EXIT("recv");
}
static void
isc_httpd_accept(isc_task_t *task, isc_event_t *ev) {
isc_result_t result;
isc_httpdmgr_t *httpdmgr = ev->ev_arg;
isc_httpd_t *httpd;
isc_region_t r;
isc_socket_newconnev_t *nev = (isc_socket_newconnev_t *)ev;
isc_sockaddr_t peeraddr;
ENTER("accept");
LOCK(&httpdmgr->lock);
if (MSHUTTINGDOWN(httpdmgr)) {
NOTICE("accept shutting down, goto out");
goto out;
}
if (nev->result == ISC_R_CANCELED) {
NOTICE("accept canceled, goto out");
goto out;
}
if (nev->result != ISC_R_SUCCESS) {
/* XXXMLG log failure */
NOTICE("accept returned failure, goto requeue");
goto requeue;
}
(void)isc_socket_getpeername(nev->newsocket, &peeraddr);
if (httpdmgr->client_ok != NULL &&
!(httpdmgr->client_ok)(&peeraddr, httpdmgr->cb_arg)) {
isc_socket_detach(&nev->newsocket);
goto requeue;
}
httpd = isc_mem_get(httpdmgr->mctx, sizeof(isc_httpd_t));
if (httpd == NULL) {
/* XXXMLG log failure */
NOTICE("accept failed to allocate memory, goto requeue");
isc_socket_detach(&nev->newsocket);
goto requeue;
}
httpd->mgr = httpdmgr;
ISC_LINK_INIT(httpd, link);
ISC_LIST_APPEND(httpdmgr->running, httpd, link);
ISC_HTTPD_SETRECV(httpd);
httpd->sock = nev->newsocket;
isc_socket_setname(httpd->sock, "httpd", NULL);
httpd->flags = 0;
/*
* Initialize the buffer for our headers.
*/
httpd->headerdata = isc_mem_get(httpdmgr->mctx, HTTP_SENDGROW);
if (httpd->headerdata == NULL) {
isc_mem_put(httpdmgr->mctx, httpd, sizeof(isc_httpd_t));
isc_socket_detach(&nev->newsocket);
goto requeue;
}
httpd->headerlen = HTTP_SENDGROW;
isc_buffer_init(&httpd->headerbuffer, httpd->headerdata,
httpd->headerlen);
ISC_LIST_INIT(httpd->bufflist);
isc_buffer_initnull(&httpd->bodybuffer);
reset_client(httpd);
r.base = (unsigned char *)httpd->recvbuf;
r.length = HTTP_RECVLEN - 1;
result = isc_socket_recv(httpd->sock, &r, 1, task, isc_httpd_recvdone,
httpd);
/* FIXME!!! */
POST(result);
NOTICE("accept queued recv on socket");
requeue:
result = isc_socket_accept(httpdmgr->sock, task, isc_httpd_accept,
httpdmgr);
if (result != ISC_R_SUCCESS) {
/* XXXMLG what to do? Log failure... */
NOTICE("accept could not reaccept due to failure");
}
out:
UNLOCK(&httpdmgr->lock);
httpdmgr_destroy(httpdmgr);
isc_event_free(&ev);
EXIT("accept");
}
/**
* Convert LDAP DN to absolute DNS names.
*
* @param[in] dn LDAP DN with one or two idnsName components at the
* beginning.
* @param[out] target Absolute DNS name derived from the first two idnsNames.
* @param[out] origin Absolute DNS name derived from the last idnsName
* component of DN, i.e. zone. Can be NULL.
* @param[out] iszone ISC_TRUE if DN points to zone object, ISC_FALSE otherwise.
*
* @code
* Examples:
* dn = "idnsName=foo.bar, idnsName=example.org., cn=dns, dc=example, dc=org"
* target = "foo.bar.example.org."
* origin = "example.org."
*
* dn = "idnsname=89, idnsname=4.34.10.in-addr.arpa, cn=dns, dc=example, dc=org"
* target = "89.4.34.10.in-addr.arpa."
* origin = "4.34.10.in-addr.arpa."
*
* dn = "idnsname=third.test., idnsname=test., cn=dns, dc=example, dc=org"
* target = "third.test."
* origin = "test."
* @endcode
*/
isc_result_t
dn_to_dnsname(isc_mem_t *mctx, const char *dn_str, dns_name_t *target,
dns_name_t *otarget, isc_boolean_t *iszone)
{
LDAPDN dn = NULL;
LDAPRDN rdn = NULL;
LDAPAVA *attr = NULL;
int idx;
int ret;
DECLARE_BUFFERED_NAME(name);
DECLARE_BUFFERED_NAME(origin);
isc_buffer_t name_buf;
isc_buffer_t origin_buf;
isc_result_t result;
REQUIRE(dn_str != NULL);
REQUIRE(target != NULL);
INIT_BUFFERED_NAME(name);
INIT_BUFFERED_NAME(origin);
isc_buffer_initnull(&name_buf);
isc_buffer_initnull(&origin_buf);
/* Example DN: cn=a+sn=b, ou=people */
ret = ldap_str2dn(dn_str, &dn, LDAP_DN_FORMAT_LDAPV3);
if (ret != LDAP_SUCCESS || dn == NULL) {
log_bug("ldap_str2dn failed: %u", ret);
CLEANUP_WITH(ISC_R_UNEXPECTED);
}
/* iterate over DN components: e.g. cn=a+sn=b */
for (idx = 0; dn[idx] != NULL; idx++) {
rdn = dn[idx];
/* "iterate" over RDN components: e.g. cn=a */
INSIST(rdn[0] != NULL); /* RDN without (attr=value)?! */
if (rdn[1] != NULL) {
log_bug("multi-valued RDNs are not supported");
CLEANUP_WITH(ISC_R_NOTIMPLEMENTED);
}
/* attribute in current RDN component */
attr = rdn[0];
if ((attr->la_flags & LDAP_AVA_STRING) == 0) {
log_error("non-string attribute detected: position %u",
idx);
CLEANUP_WITH(ISC_R_NOTIMPLEMENTED);
}
if (strncasecmp("idnsName", attr->la_attr.bv_val,
attr->la_attr.bv_len) == 0) {
if (idx == 0) {
isc_buffer_init(&name_buf,
attr->la_value.bv_val,
attr->la_value.bv_len);
isc_buffer_add(&name_buf,
attr->la_value.bv_len);
} else if (idx == 1) {
isc_buffer_init(&origin_buf,
attr->la_value.bv_val,
attr->la_value.bv_len);
isc_buffer_add(&origin_buf,
attr->la_value.bv_len);
} else { /* more than two idnsNames?! */
break;
}
} else { /* no match - idx holds position */
break;
}
}
/* filter out unsupported cases */
if (idx <= 0) {
log_error("no idnsName component found in DN");
CLEANUP_WITH(ISC_R_UNEXPECTEDEND);
} else if (idx == 1) { /* zone only */
if (iszone != NULL)
*iszone = ISC_TRUE;
CHECK(dns_name_copy(dns_rootname, &origin, NULL));
CHECK(dns_name_fromtext(&name, &name_buf, dns_rootname, 0, NULL));
} else if (idx == 2) { /* owner and zone */
if (iszone != NULL)
*iszone = ISC_FALSE;
CHECK(dns_name_fromtext(&origin, &origin_buf, dns_rootname, 0,
NULL));
CHECK(dns_name_fromtext(&name, &name_buf, &origin, 0, NULL));
if (dns_name_issubdomain(&name, &origin) == ISC_FALSE) {
log_error("out-of-zone data: first idnsName is not a "
"subdomain of the other");
CLEANUP_WITH(DNS_R_BADOWNERNAME);
} else if (dns_name_equal(&name, &origin) == ISC_TRUE) {
log_error("attempt to redefine zone apex: first "
"idnsName equals to zone name");
CLEANUP_WITH(DNS_R_BADOWNERNAME);
}
} else {
log_error("unsupported number of idnsName components in DN: "
"%u components found", idx);
CLEANUP_WITH(ISC_R_NOTIMPLEMENTED);
}
cleanup:
if (result == ISC_R_SUCCESS)
result = dns_name_dupwithoffsets(&name, mctx, target);
else
log_error_r("failed to convert DN '%s' to DNS name", dn_str);
if (result == ISC_R_SUCCESS && otarget != NULL)
result = dns_name_dupwithoffsets(&origin, mctx, otarget);
if (result != ISC_R_SUCCESS) {
if (dns_name_dynamic(target))
dns_name_free(target, mctx);
if (otarget) {
if (dns_name_dynamic(otarget))
dns_name_free(otarget, mctx);
}
}
if (dn != NULL)
ldap_dnfree(dn);
return result;
}
isc_result_t
fwd_print_list_buff(isc_mem_t *mctx, dns_forwarders_t *fwdrs,
isc_buffer_t **out_buf) {
isc_result_t result;
size_t list_len;
isc_buffer_t *dummy_fwdr_buf = NULL; /* fully dynamic allocation */
isc_buffer_t tmp_buf; /* hack: only the base buffer is allocated */
cfg_parser_t *parser = NULL;
cfg_obj_t *forwarders_cfg = NULL;
const cfg_obj_t *faddresses;
const cfg_listelt_t *fwdr_cfg; /* config representation */
/* internal representation */
#if LIBDNS_VERSION_MAJOR < 140
isc_sockaddr_t *fwdr_int;
#else /* LIBDNS_VERSION_MAJOR >= 140 */
dns_forwarder_t *fwdr_int;
#endif
isc_buffer_initnull(&tmp_buf);
tmp_buf.mctx = mctx;
CHECK(cfg_parser_create(mctx, dns_lctx, &parser));
/* Create dummy string with list of IP addresses of the same length
* as the original list of forwarders. Parse this string to obtain
* nested cfg structures which will be filled with data for actual
* forwarders.
*
* This is nasty hack but it is easiest way to create list of cfg_objs
* I found.
*/
list_len = fwd_list_len(fwdrs);
CHECK(fwd_list_gen_dummy_config_string(mctx,
list_len, &dummy_fwdr_buf));
CHECK(cfg_parse_buffer(parser, dummy_fwdr_buf,
cfg_type_forwarders, &forwarders_cfg));
/* Walk through internal representation and cfg representation and copy
* data from the internal one to cfg data structures.*/
faddresses = cfg_tuple_get(forwarders_cfg, "addresses");
for (fwdr_int = ISC_LIST_HEAD(
#if LIBDNS_VERSION_MAJOR < 140
fwdrs->addrs
#else /* LIBDNS_VERSION_MAJOR >= 140 */
fwdrs->fwdrs
#endif
), fwdr_cfg = cfg_list_first(faddresses);
INSIST((fwdr_int == NULL) == (fwdr_cfg == NULL)), fwdr_int != NULL;
fwdr_int = ISC_LIST_NEXT(fwdr_int, link), fwdr_cfg = cfg_list_next(fwdr_cfg)) {
#if LIBDNS_VERSION_MAJOR < 140
fwdr_cfg->obj->value.sockaddr = *fwdr_int;
#else /* LIBDNS_VERSION_MAJOR >= 140 */
fwdr_cfg->obj->value.sockaddrdscp.sockaddr = fwdr_int->addr;
fwdr_cfg->obj->value.sockaddrdscp.dscp = fwdr_int->dscp;
#endif
}
cfg_print(faddresses, buffer_append_str, &tmp_buf);
/* create and copy string from tmp to output buffer */
CHECK(isc_buffer_allocate(mctx, out_buf, tmp_buf.used));
isc_buffer_putmem(*out_buf, isc_buffer_base(&tmp_buf),
isc_buffer_usedlength(&tmp_buf));
cleanup:
if (forwarders_cfg != NULL)
cfg_obj_destroy(parser, &forwarders_cfg);
if (parser != NULL)
cfg_parser_destroy(&parser);
if (dummy_fwdr_buf != NULL) {
if (tmp_buf.base != NULL)
isc_mem_put(mctx, tmp_buf.base, tmp_buf.length);
isc_buffer_free(&dummy_fwdr_buf);
}
return result;
}
