2 * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * a tuple describing on what to listen
46 /* the current ones */
48 static struct port_desc *ports;
49 static size_t num_ports;
50 static pid_t bonjour_pid = -1;
53 * add `family, port, protocol' to the list with duplicate suppresion.
57 add_port(krb5_context context,
58 int family, int port, const char *protocol)
63 if(strcmp(protocol, "udp") == 0)
65 else if(strcmp(protocol, "tcp") == 0)
69 for(i = 0; i < num_ports; i++){
70 if(ports[i].type == type
71 && ports[i].port == port
72 && ports[i].family == family)
75 ports = realloc(ports, (num_ports + 1) * sizeof(*ports));
77 krb5_err (context, 1, errno, "realloc");
78 ports[num_ports].family = family;
79 ports[num_ports].type = type;
80 ports[num_ports].port = port;
85 * add a triple but with service -> port lookup
86 * (this prints warnings for stuff that does not exist)
90 add_port_service(krb5_context context,
91 int family, const char *service, int port,
94 port = krb5_getportbyname (context, service, protocol, port);
95 add_port (context, family, port, protocol);
99 * add the port with service -> port lookup or string -> number
100 * (no warning is printed)
104 add_port_string (krb5_context context,
105 int family, const char *str, const char *protocol)
110 sp = roken_getservbyname (str, protocol);
116 port = htons(strtol(str, &end, 0));
120 add_port (context, family, port, protocol);
124 * add the standard collection of ports for `family'
128 add_standard_ports (krb5_context context,
129 krb5_kdc_configuration *config,
132 add_port_service(context, family, "kerberos", 88, "udp");
133 add_port_service(context, family, "kerberos", 88, "tcp");
134 add_port_service(context, family, "kerberos-sec", 88, "udp");
135 add_port_service(context, family, "kerberos-sec", 88, "tcp");
137 add_port_service(context, family, "http", 80, "tcp");
138 if(config->enable_kx509) {
139 add_port_service(context, family, "kca_service", 9878, "udp");
140 add_port_service(context, family, "kca_service", 9878, "tcp");
146 * parse the set of space-delimited ports in `str' and add them.
147 * "+" => all the standard ones
148 * otherwise it's port|service[/protocol]
152 parse_ports(krb5_context context,
153 krb5_kdc_configuration *config,
158 char *str_copy = strdup (str);
160 p = strtok_r(str_copy, " \t", &pos);
162 if(strcmp(p, "+") == 0) {
164 add_standard_ports(context, config, AF_INET6);
166 add_standard_ports(context, config, AF_INET);
168 char *q = strchr(p, '/');
172 add_port_string(context, AF_INET6, p, q);
174 add_port_string(context, AF_INET, p, q);
177 add_port_string(context, AF_INET6, p, "udp");
178 add_port_string(context, AF_INET6, p, "tcp");
180 add_port_string(context, AF_INET, p, "udp");
181 add_port_string(context, AF_INET, p, "tcp");
185 p = strtok_r(NULL, " \t", &pos);
191 * every socket we listen on
202 struct sockaddr_storage __ss;
205 char addr_string[128];
209 init_descr(struct descr *d)
211 memset(d, 0, sizeof(*d));
212 d->sa = (struct sockaddr *)&d->__ss;
213 d->s = rk_INVALID_SOCKET;
217 * re-initialize all `n' ->sa in `d'.
221 reinit_descrs (struct descr *d, int n)
225 for (i = 0; i < n; ++i)
226 d[i].sa = (struct sockaddr *)&d[i].__ss;
230 * Create the socket (family, type, port) in `d'
234 init_socket(krb5_context context,
235 krb5_kdc_configuration *config,
236 struct descr *d, krb5_address *a, int family, int type, int port)
239 struct sockaddr_storage __ss;
240 struct sockaddr *sa = (struct sockaddr *)&__ss;
241 krb5_socklen_t sa_size = sizeof(__ss);
245 ret = krb5_addr2sockaddr (context, a, sa, &sa_size, port);
247 krb5_warn(context, ret, "krb5_addr2sockaddr");
248 rk_closesocket(d->s);
249 d->s = rk_INVALID_SOCKET;
253 if (sa->sa_family != family)
256 d->s = socket(family, type, 0);
257 if(rk_IS_BAD_SOCKET(d->s)){
258 krb5_warn(context, errno, "socket(%d, %d, 0)", family, type);
259 d->s = rk_INVALID_SOCKET;
263 #if defined(HAVE_SETSOCKOPT) && defined(SOL_SOCKET) && defined(SO_REUSEADDR)
266 setsockopt(d->s, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
272 socket_set_nonblocking(d->s, 1);
274 if(rk_IS_SOCKET_ERROR(bind(d->s, sa, sa_size))){
278 krb5_print_address (a, a_str, sizeof(a_str), &len);
279 krb5_warn(context, errno, "bind %s/%d", a_str, ntohs(port));
280 rk_closesocket(d->s);
281 d->s = rk_INVALID_SOCKET;
284 if(type == SOCK_STREAM && rk_IS_SOCKET_ERROR(listen(d->s, SOMAXCONN))){
288 krb5_print_address (a, a_str, sizeof(a_str), &len);
289 krb5_warn(context, errno, "listen %s/%d", a_str, ntohs(port));
290 rk_closesocket(d->s);
291 d->s = rk_INVALID_SOCKET;
294 socket_set_keepalive(d->s, 1);
298 * Allocate descriptors for all the sockets that we should listen on
299 * and return the number of them.
303 init_sockets(krb5_context context,
304 krb5_kdc_configuration *config,
311 krb5_addresses addresses;
313 if (explicit_addresses.len) {
314 addresses = explicit_addresses;
316 ret = krb5_get_all_server_addrs (context, &addresses);
318 krb5_err (context, 1, ret, "krb5_get_all_server_addrs");
320 parse_ports(context, config, port_str);
321 d = malloc(addresses.len * num_ports * sizeof(*d));
323 krb5_errx(context, 1, "malloc(%lu) failed",
324 (unsigned long)num_ports * sizeof(*d));
326 for (i = 0; i < num_ports; i++){
327 for (j = 0; j < addresses.len; ++j) {
328 init_socket(context, config, &d[num], &addresses.val[j],
329 ports[i].family, ports[i].type, ports[i].port);
330 if(d[num].s != rk_INVALID_SOCKET){
334 krb5_print_address (&addresses.val[j], a_str,
335 sizeof(a_str), &len);
337 kdc_log(context, config, 3, "listening on %s port %u/%s",
339 ntohs(ports[i].port),
340 (ports[i].type == SOCK_STREAM) ? "tcp" : "udp");
346 krb5_free_addresses (context, &addresses);
347 d = realloc(d, num * sizeof(*d));
348 if (d == NULL && num != 0)
349 krb5_errx(context, 1, "realloc(%lu) failed",
350 (unsigned long)num * sizeof(*d));
351 reinit_descrs (d, num);
361 descr_type(struct descr *d)
363 if (d->type == SOCK_DGRAM)
365 else if (d->type == SOCK_STREAM)
371 addr_to_string(krb5_context context,
372 struct sockaddr *addr, size_t addr_len, char *str, size_t len)
375 if(krb5_sockaddr2address(context, addr, &a) == 0) {
376 if(krb5_print_address(&a, str, len, &len) == 0) {
377 krb5_free_address(context, &a);
380 krb5_free_address(context, &a);
382 snprintf(str, len, "<family=%d>", addr->sa_family);
390 send_reply(krb5_context context,
391 krb5_kdc_configuration *config,
392 krb5_boolean prependlength,
396 kdc_log(context, config, 4,
397 "sending %lu bytes to %s", (unsigned long)reply->length,
401 l[0] = (reply->length >> 24) & 0xff;
402 l[1] = (reply->length >> 16) & 0xff;
403 l[2] = (reply->length >> 8) & 0xff;
404 l[3] = reply->length & 0xff;
405 if(rk_IS_SOCKET_ERROR(sendto(d->s, l, sizeof(l), 0, d->sa, d->sock_len))) {
406 kdc_log (context, config,
407 1, "sendto(%s): %s", d->addr_string,
408 strerror(rk_SOCK_ERRNO));
412 if(rk_IS_SOCKET_ERROR(sendto(d->s, reply->data, reply->length, 0, d->sa, d->sock_len))) {
413 kdc_log (context, config, 1, "sendto(%s): %s", d->addr_string,
414 strerror(rk_SOCK_ERRNO));
420 * Handle the request in `buf, len' to socket `d'
424 do_request(krb5_context context,
425 krb5_kdc_configuration *config,
426 void *buf, size_t len, krb5_boolean prependlength,
431 int datagram_reply = (d->type == SOCK_DGRAM);
433 krb5_kdc_update_time(NULL);
435 krb5_data_zero(&reply);
436 ret = krb5_kdc_process_request(context, config,
437 buf, len, &reply, &prependlength,
438 d->addr_string, d->sa,
441 krb5_kdc_save_request(context, request_log, buf, len, &reply, d->sa);
443 send_reply(context, config, prependlength, d, &reply);
444 krb5_data_free(&reply);
447 kdc_log(context, config, 1,
448 "Failed processing %lu byte request from %s",
449 (unsigned long)len, d->addr_string);
453 * Handle incoming data to the UDP socket in `d'
457 handle_udp(krb5_context context,
458 krb5_kdc_configuration *config,
464 buf = malloc(max_request_udp);
466 kdc_log(context, config, 1, "Failed to allocate %lu bytes",
467 (unsigned long)max_request_udp);
471 d->sock_len = sizeof(d->__ss);
472 n = recvfrom(d->s, buf, max_request_udp, 0, d->sa, &d->sock_len);
473 if (rk_IS_SOCKET_ERROR(n)) {
474 if (rk_SOCK_ERRNO != EAGAIN && rk_SOCK_ERRNO != EINTR)
475 krb5_warn(context, rk_SOCK_ERRNO, "recvfrom");
477 addr_to_string (context, d->sa, d->sock_len,
478 d->addr_string, sizeof(d->addr_string));
479 if ((size_t)n == max_request_udp) {
481 krb5_warn(context, errno,
482 "recvfrom: truncated packet from %s, asking for TCP",
484 krb5_mk_error(context,
485 KRB5KRB_ERR_RESPONSE_TOO_BIG,
493 send_reply(context, config, FALSE, d, &data);
494 krb5_data_free(&data);
496 do_request(context, config, buf, n, FALSE, d);
503 clear_descr(struct descr *d)
506 memset(d->buf, 0, d->size);
508 if(d->s != rk_INVALID_SOCKET)
509 rk_closesocket(d->s);
510 d->s = rk_INVALID_SOCKET;
514 /* remove HTTP %-quoting from buf */
518 unsigned char *p, *q;
521 for (p = q = (unsigned char *)buf; *p; p++, q++) {
523 if (!(isxdigit(p[1]) && isxdigit(p[2])))
526 if (sscanf((char *)p + 1, "%2x", &x) != 1)
539 #define TCP_TIMEOUT 4
542 * accept a new TCP connection on `d[parent]' and store it in `d[child]'
546 add_new_tcp (krb5_context context,
547 krb5_kdc_configuration *config,
548 struct descr *d, int parent, int child)
555 d[child].sock_len = sizeof(d[child].__ss);
556 s = accept(d[parent].s, d[child].sa, &d[child].sock_len);
557 if(rk_IS_BAD_SOCKET(s)) {
558 if (rk_SOCK_ERRNO != EAGAIN && rk_SOCK_ERRNO != EINTR)
559 krb5_warn(context, rk_SOCK_ERRNO, "accept");
564 if (s >= FD_SETSIZE) {
565 krb5_warnx(context, "socket FD too large");
572 d[child].timeout = time(NULL) + TCP_TIMEOUT;
573 d[child].type = SOCK_STREAM;
574 addr_to_string (context,
575 d[child].sa, d[child].sock_len,
576 d[child].addr_string, sizeof(d[child].addr_string));
580 * Grow `d' to handle at least `n'.
581 * Return != 0 if fails
585 grow_descr (krb5_context context,
586 krb5_kdc_configuration *config,
587 struct descr *d, size_t n)
589 if (d->size - d->len < n) {
593 grow = max(1024, d->len + n);
594 if (d->size + grow > max_request_tcp) {
595 kdc_log(context, config, 2, "Request exceeds max request size (%lu bytes).",
596 (unsigned long)d->size + grow);
600 tmp = realloc (d->buf, d->size + grow);
602 kdc_log(context, config, 1, "Failed to re-allocate %lu bytes.",
603 (unsigned long)d->size + grow);
614 * Try to handle the TCP data at `d->buf, d->len'.
615 * Return -1 if failed, 0 if succesful, and 1 if data is complete.
619 handle_vanilla_tcp (krb5_context context,
620 krb5_kdc_configuration *config,
626 sp = krb5_storage_from_mem(d->buf, d->len);
628 kdc_log (context, config, 1, "krb5_storage_from_mem failed");
631 krb5_ret_uint32(sp, &len);
632 krb5_storage_free(sp);
633 if(d->len - 4 >= len) {
634 memmove(d->buf, d->buf + 4, d->len - 4);
642 * Try to handle the TCP/HTTP data at `d->buf, d->len'.
643 * Return -1 if failed, 0 if succesful, and 1 if data is complete.
647 handle_http_tcp (krb5_context context,
648 krb5_kdc_configuration *config,
658 /* If its a multi line query, truncate off the first line */
659 p = strstr(s, "\r\n");
664 t = strtok_r(s, " \t", &p);
666 kdc_log(context, config, 2,
667 "Missing HTTP operand (GET) request from %s", d->addr_string);
671 t = strtok_r(NULL, " \t", &p);
673 kdc_log(context, config, 2,
674 "Missing HTTP GET data in request from %s", d->addr_string);
678 data = malloc(strlen(t));
680 kdc_log(context, config, 1, "Failed to allocate %lu bytes",
681 (unsigned long)strlen(t));
686 if(de_http(t) != 0) {
687 kdc_log(context, config, 2, "Malformed HTTP request from %s", d->addr_string);
688 kdc_log(context, config, 4, "HTTP request: %s", t);
692 proto = strtok_r(NULL, " \t", &p);
694 kdc_log(context, config, 2, "Malformed HTTP request from %s", d->addr_string);
698 len = rk_base64_decode(t, data);
702 "Server: Heimdal/" VERSION "\r\n"
703 "Cache-Control: no-cache\r\n"
704 "Pragma: no-cache\r\n"
705 "Content-type: text/html\r\n"
706 "Content-transfer-encoding: 8bit\r\n\r\n"
707 "<TITLE>404 Not found</TITLE>\r\n"
708 "<H1>404 Not found</H1>\r\n"
709 "That page doesn't exist, maybe you are looking for "
710 "<A HREF=\"http://www.h5l.org/\">Heimdal</A>?\r\n";
711 kdc_log(context, config, 2, "HTTP request from %s is non KDC request", d->addr_string);
712 kdc_log(context, config, 4, "HTTP request: %s", t);
714 if (rk_IS_SOCKET_ERROR(send(d->s, proto, strlen(proto), 0))) {
715 kdc_log(context, config, 1, "HTTP write failed: %s: %s",
716 d->addr_string, strerror(rk_SOCK_ERRNO));
719 if (rk_IS_SOCKET_ERROR(send(d->s, msg, strlen(msg), 0))) {
720 kdc_log(context, config, 1, "HTTP write failed: %s: %s",
721 d->addr_string, strerror(rk_SOCK_ERRNO));
729 "Server: Heimdal/" VERSION "\r\n"
730 "Cache-Control: no-cache\r\n"
731 "Pragma: no-cache\r\n"
732 "Content-type: application/octet-stream\r\n"
733 "Content-transfer-encoding: binary\r\n\r\n";
734 if (rk_IS_SOCKET_ERROR(send(d->s, proto, strlen(proto), 0))) {
736 kdc_log(context, config, 1, "HTTP write failed: %s: %s",
737 d->addr_string, strerror(rk_SOCK_ERRNO));
740 if (rk_IS_SOCKET_ERROR(send(d->s, msg, strlen(msg), 0))) {
742 kdc_log(context, config, 1, "HTTP write failed: %s: %s",
743 d->addr_string, strerror(rk_SOCK_ERRNO));
747 if ((size_t)len > d->len)
749 memcpy(d->buf, data, len);
756 http1_request_taste(const unsigned char *req, size_t len)
758 return !!((len >= sizeof("GET ") - 1 &&
759 memcmp(req, "GET ", sizeof("GET ") - 1) == 0) ||
760 (len >= sizeof("HEAD ") - 1 &&
761 memcmp(req, "HEAD ", sizeof("HEAD ") - 1) == 0));
765 http1_request_is_complete(const unsigned char *req, size_t len)
768 return http1_request_taste(req, len) &&
769 memmem(req, len, "\r\n\r\n", sizeof("\r\n\r\n") - 4) != NULL;
772 * For POST (the MSFT variant of this protocol) we'll need something like
773 * this (plus check for Content-Length/Transfer-Encoding):
775 * const unsigned char *body;
776 * if ((body = memmem(req, len, "\r\n\r\n", sizeof("\r\n\r\n") - 4)) == NULL)
778 * body += sizeof("\r\n\r\n") - 4;
779 * len -= (body - req);
780 * return memmem(body, len, "\r\n\r\n", sizeof("\r\n\r\n") - 4) != NULL;
782 * Since the POST-based variant runs over HTTPS, we'll probably implement
783 * that in a proxy instead of here.
788 * Handle incoming data to the TCP socket in `d[index]'
792 handle_tcp(krb5_context context,
793 krb5_kdc_configuration *config,
794 struct descr *d, int idx, int min_free)
796 unsigned char buf[1024];
800 if (d[idx].timeout == 0) {
801 add_new_tcp (context, config, d, idx, min_free);
805 n = recvfrom(d[idx].s, buf, sizeof(buf), 0, NULL, NULL);
806 if(rk_IS_SOCKET_ERROR(n)){
807 krb5_warn(context, rk_SOCK_ERRNO, "recvfrom failed from %s to %s/%d",
808 d[idx].addr_string, descr_type(d + idx),
812 krb5_warnx(context, "connection closed before end of data after %lu "
813 "bytes from %s to %s/%d", (unsigned long)d[idx].len,
814 d[idx].addr_string, descr_type(d + idx),
816 clear_descr (d + idx);
819 if (grow_descr (context, config, &d[idx], n))
821 memcpy(d[idx].buf + d[idx].len, buf, n);
823 if(d[idx].len > 4 && d[idx].buf[0] == 0) {
824 ret = handle_vanilla_tcp (context, config, &d[idx]);
825 } else if (enable_http &&
826 http1_request_taste(d[idx].buf, d[idx].len)) {
828 if (http1_request_is_complete(d[idx].buf, d[idx].len)) {
829 /* NUL-terminate at the request header ending \r\n\r\n */
830 d[idx].buf[d[idx].len - 4] = '\0';
831 ret = handle_http_tcp (context, config, &d[idx]);
833 } else if (d[idx].len > 4) {
834 kdc_log (context, config,
835 2, "TCP data of strange type from %s to %s/%d",
836 d[idx].addr_string, descr_type(d + idx),
838 if (d[idx].buf[0] & 0x80) {
841 kdc_log (context, config, 2, "TCP extension not supported");
843 ret = krb5_mk_error(context,
844 KRB5KRB_ERR_FIELD_TOOLONG,
853 send_reply(context, config, TRUE, d + idx, &reply);
854 krb5_data_free(&reply);
857 clear_descr(d + idx);
862 * ret == 0 -> not enough of request buffered -> wait for more
863 * ret == 1 -> go ahead and perform the request
864 * ret != 0 (really, < 0) -> error, probably ENOMEM, close connection
867 do_request(context, config,
868 d[idx].buf, d[idx].len, TRUE, &d[idx]);
871 * Note: this means we don't keep the connection open even where we
872 * the protocol permits it.
875 clear_descr(d + idx);
880 handle_islive(int fd)
885 ret = read(fd, &buf, 1);
892 realloc_descrs(struct descr **d, unsigned int *ndescr)
897 tmp = realloc(*d, (*ndescr + 4) * sizeof(**d));
902 reinit_descrs (*d, *ndescr);
903 memset(*d + *ndescr, 0, 4 * sizeof(**d));
904 for(i = *ndescr; i < *ndescr + 4; i++)
913 next_min_free(krb5_context context, struct descr **d, unsigned int *ndescr)
918 for(i = 0; i < *ndescr; i++) {
920 if(rk_IS_BAD_SOCKET(s))
925 if(!realloc_descrs(d, ndescr)) {
927 krb5_warnx(context, "No memory");
934 loop(krb5_context context, krb5_kdc_configuration *config,
935 struct descr **dp, unsigned int *ndescrp, int islive)
937 struct descr *d = *dp;
938 unsigned int ndescr = *ndescrp;
940 while (exit_flag == 0) {
941 struct timeval tmout;
949 FD_SET(islive, &fds);
952 for (i = 0; i < ndescr; i++) {
953 if (!rk_IS_BAD_SOCKET(d[i].s)) {
954 if (d[i].type == SOCK_STREAM &&
955 d[i].timeout && d[i].timeout < time(NULL)) {
956 kdc_log(context, config, 2,
957 "TCP-connection from %s expired after %lu bytes",
958 d[i].addr_string, (unsigned long)d[i].len);
962 #ifndef NO_LIMIT_FD_SETSIZE
966 if (max_fd >= FD_SETSIZE)
967 krb5_errx(context, 1, "fd too large");
970 FD_SET(d[i].s, &fds);
974 tmout.tv_sec = TCP_TIMEOUT;
976 switch(select(max_fd + 1, &fds, 0, 0, &tmout)){
981 krb5_warn(context, rk_SOCK_ERRNO, "select");
985 if (islive > -1 && FD_ISSET(islive, &fds))
986 handle_islive(islive);
988 for (i = 0; i < ndescr; i++)
989 if (!rk_IS_BAD_SOCKET(d[i].s) && FD_ISSET(d[i].s, &fds)) {
990 min_free = next_min_free(context, dp, ndescrp);
994 if (d[i].type == SOCK_DGRAM)
995 handle_udp(context, config, &d[i]);
996 else if (d[i].type == SOCK_STREAM)
997 handle_tcp(context, config, d, i, min_free);
1002 switch (exit_flag) {
1004 kdc_log(context, config, 0,
1005 "KDC worker process exiting because KDC master exited.");
1009 kdc_log(context, config, 0, "CPU time limit exceeded");
1014 kdc_log(context, config, 0, "Terminated");
1017 kdc_log(context, config, 0, "Unexpected exit reason: %d", exit_flag);
1024 bonjour_kid(krb5_context context, krb5_kdc_configuration *config, const char *argv0, int *islive)
1028 if (do_bonjour > 0) {
1029 bonjour_announce(context, config);
1031 while (read(0, &buf, 1) == 1)
1036 if ((bonjour_pid = fork()) != 0)
1040 if (dup2(islive[1], 0) == -1)
1041 err(1, "failed to announce with bonjour (dup)");
1044 execlp(argv0, "kdc", "--bonjour", NULL);
1045 err(1, "failed to announce with bonjour (exec)");
1051 kill_kids(pid_t *pids, int max_kids, int sig)
1055 for (i=0; i < max_kids; i++)
1058 if (bonjour_pid > 0)
1059 kill(sig, bonjour_pid);
1063 reap_kid(krb5_context context, krb5_kdc_configuration *config,
1064 pid_t *pids, int max_kids, int options)
1069 int i = 0; /* quiet warnings */
1072 const char *sev = "info: ";
1074 pid = waitpid(-1, &status, options);
1078 if (pid == bonjour_pid) {
1079 bonjour_pid = (pid_t)-1;
1082 for (i=0; i < max_kids; i++) {
1083 if (pids[i] == pid) {
1084 pids[i] = (pid_t)-1;
1091 if (i == max_kids) {
1092 /* should not happen */
1099 if (WIFEXITED(status))
1100 kdc_log(context, config, level,
1101 "%sKDC reaped %s process: %d, exit status: %d",
1102 sev, what, (int)pid, WEXITSTATUS(status));
1103 else if (WIFSIGNALED(status))
1104 kdc_log(context, config, level,
1105 "%sKDC reaped %s process: %d, term signal %d%s",
1106 sev, what, (int)pid, WTERMSIG(status),
1107 WCOREDUMP(status) ? " (core dumped)" : "");
1109 kdc_log(context, config, level, "%sKDC reaped %s process: %d",
1110 sev, what, (int)pid);
1116 reap_kids(krb5_context context, krb5_kdc_configuration *config,
1117 pid_t *pids, int max_kids)
1122 if (reap_kid(context, config, pids, max_kids, WNOHANG) == 0)
1131 select_sleep(int microseconds)
1135 tv.tv_sec = microseconds / 1000000;
1136 tv.tv_usec = microseconds % 1000000;
1137 select(0, NULL, NULL, NULL, &tv);
1142 start_kdc(krb5_context context,
1143 krb5_kdc_configuration *config, const char *argv0)
1148 unsigned int ndescr;
1152 int max_kdcs = config->num_kdc_processes;
1160 bonjour_kid(context, config, argv0, NULL);
1164 #ifdef _SC_NPROCESSORS_ONLN
1166 max_kdcs = sysconf(_SC_NPROCESSORS_ONLN);
1172 pids = calloc(max_kdcs, sizeof(*pids));
1174 krb5_err(context, 1, errno, "malloc");
1177 * We open a socketpair of which we hand one end to each of our kids.
1178 * When we exit, for whatever reason, the children will notice an EOF
1179 * on their end and be able to cleanly exit.
1182 if (socketpair(PF_UNIX, SOCK_STREAM, 0, islive) == -1)
1183 krb5_errx(context, 1, "socketpair");
1184 socket_set_nonblocking(islive[1], 1);
1187 ndescr = init_sockets(context, config, &d);
1189 krb5_errx(context, 1, "No sockets!");
1195 bonjour_kid(context, config, argv0, islive);
1198 kdc_log(context, config, 3, "KDC started master process pid=%d", getpid());
1200 kdc_log(context, config, 3, "KDC started pid=%d", getpid());
1203 roken_detach_finish(NULL, daemon_child);
1206 if (!testing_flag) {
1207 /* Note that we might never execute the body of this loop */
1208 while (exit_flag == 0) {
1210 if (num_kdcs >= max_kdcs) {
1211 num_kdcs -= reap_kid(context, config, pids, max_kdcs, 0);
1216 num_kdcs -= reap_kids(context, config, pids, max_kdcs);
1222 loop(context, config, &d, &ndescr, islive[1]);
1225 /* XXXrcd: hmmm, do something useful?? */
1226 kdc_log(context, config, 1,
1227 "KDC master process could not fork worker process");
1231 for (i = 0; i < max_kdcs; i++) {
1237 if (i >= max_kdcs) {
1238 /* This should not happen */
1239 kdc_log(context, config, 1,
1240 "warning: forked untracked child process: %d",
1243 kdc_log(context, config, 3, "KDC worker process started: %d",
1246 /* Slow down the creation of KDCs... */
1247 select_sleep(12500);
1252 /* Closing these sockets should cause the kids to die... */
1257 /* Close our listener sockets before terminating workers */
1258 for (i = 0; i < ndescr; ++i)
1261 gettimeofday(&tv1, NULL);
1264 /* Reap every 10ms, terminate stragglers once a second, give up after 10 */
1267 num_kdcs -= reap_kids(context, config, pids, max_kdcs);
1268 if (num_kdcs == 0 && bonjour_pid <= 0)
1271 * Using select to sleep will fail with EINTR if we receive a
1272 * SIGCHLD. This is desirable.
1274 select_sleep(10000);
1275 gettimeofday(&tv3, NULL);
1276 if (tv3.tv_sec - tv1.tv_sec > 10 ||
1277 (tv3.tv_sec - tv1.tv_sec == 10 && tv3.tv_usec >= tv1.tv_usec))
1279 if (tv3.tv_sec - tv2.tv_sec > 1 ||
1280 (tv3.tv_sec - tv2.tv_sec == 1 && tv3.tv_usec >= tv2.tv_usec)) {
1281 kill_kids(pids, max_kdcs, SIGTERM);
1286 /* Kill stragglers and reap every 200ms, give up after 15s */
1288 kill_kids(pids, max_kdcs, SIGKILL);
1289 num_kdcs -= reap_kids(context, config, pids, max_kdcs);
1290 if (num_kdcs == 0 && bonjour_pid <= 0)
1292 select_sleep(200000);
1293 gettimeofday(&tv2, NULL);
1294 if (tv2.tv_sec - tv1.tv_sec > 15 ||
1295 (tv2.tv_sec - tv1.tv_sec == 15 && tv2.tv_usec >= tv1.tv_usec))
1300 kdc_log(context, config, 3, "KDC master process exiting");
1302 loop(context, config, &d, &ndescr, -1);
1303 kdc_log(context, config, 3, "KDC exiting");
1307 loop(context, config, &d, &ndescr, -1);
1308 kdc_log(context, config, 3, "KDC exiting");