2 * Copyright (c) 2000 - 2001 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
34 #include "kadmin_locl.h"
35 #ifdef HAVE_SYS_WAIT_H
39 RCSID("$Id: kadm_conn.c,v 1.13 2001/05/16 22:06:44 assar Exp $");
43 unsigned short def_port;
44 struct kadm_port *next;
48 add_kadm_port(krb5_context context, const char *service, unsigned int port)
51 p = malloc(sizeof(*p));
53 krb5_warnx(context, "failed to allocate %lu bytes\n",
54 (unsigned long)sizeof(*p));
58 p->port = strdup(service);
66 add_standard_ports (krb5_context context)
68 add_kadm_port(context, "kerberos-adm", 749);
70 add_kadm_port(context, "kerberos-master", 751);
75 * parse the set of space-delimited ports in `str' and add them.
76 * "+" => all the standard ones
77 * otherwise it's port|service[/protocol]
81 parse_ports(krb5_context context, const char *str)
85 while(strsep_copy(&str, " \t", p, sizeof(p)) != -1) {
86 if(strcmp(p, "+") == 0)
87 add_standard_ports(context);
89 add_kadm_port(context, p, 0);
94 sig_atomic_t term_flag, doing_useful_work;
100 waitpid(-1, &status, 0);
107 if(getpid() == pgrp) {
110 signal(sig, SIG_IGN);
114 if(doing_useful_work)
123 spawn_child(krb5_context context, int *socks, int num_socks, int this_sock)
126 struct sockaddr_storage __ss;
127 struct sockaddr *sa = (struct sockaddr *)&__ss;
128 socklen_t sa_size = sizeof(__ss);
135 s = accept(socks[this_sock], sa, &sa_size);
137 krb5_warn(context, errno, "accept");
140 e = krb5_sockaddr2address(context, sa, &addr);
142 krb5_warn(context, e, "krb5_sockaddr2address");
144 e = krb5_print_address (&addr, buf, sizeof(buf),
147 krb5_warn(context, e, "krb5_print_address");
149 krb5_warnx(context, "connection from %s", buf);
150 krb5_free_address(context, &addr);
155 for(i = 0; i < num_socks; i++)
157 dup2(s, STDIN_FILENO);
158 dup2(s, STDOUT_FILENO);
159 if(s != STDIN_FILENO && s != STDOUT_FILENO)
169 wait_for_connection(krb5_context context,
170 int *socks, int num_socks)
173 fd_set orig_read_set, read_set;
176 FD_ZERO(&orig_read_set);
178 for(i = 0; i < num_socks; i++) {
179 if (socks[i] >= FD_SETSIZE)
180 errx (1, "fd too large");
181 FD_SET(socks[i], &orig_read_set);
182 max_fd = max(max_fd, socks[i]);
187 if(setpgid(0, pgrp) < 0)
190 signal(SIGTERM, terminate);
191 signal(SIGINT, terminate);
192 signal(SIGCHLD, sigchld);
194 while (term_flag == 0) {
195 read_set = orig_read_set;
196 e = select(max_fd + 1, &read_set, NULL, NULL, NULL);
199 krb5_warn(context, errno, "select");
201 krb5_warnx(context, "select returned 0");
203 for(i = 0; i < num_socks; i++) {
204 if(FD_ISSET(socks[i], &read_set))
205 if(spawn_child(context, socks, num_socks, i) == 0)
210 signal(SIGCHLD, SIG_IGN);
214 pid = waitpid(-1, &status, 0);
215 if(pid == -1 && errno == ECHILD)
223 start_server(krb5_context context)
228 int *socks = NULL, *tmp;
232 for(p = kadm_ports; p; p = p->next) {
233 struct addrinfo hints, *ai, *ap;
235 memset (&hints, 0, sizeof(hints));
236 hints.ai_flags = AI_PASSIVE;
237 hints.ai_socktype = SOCK_STREAM;
239 e = getaddrinfo(NULL, p->port, &hints, &ai);
241 snprintf(portstr, sizeof(portstr), "%u", p->def_port);
242 e = getaddrinfo(NULL, portstr, &hints, &ai);
246 krb5_warn(context, krb5_eai_to_heim_errno(e, errno),
251 for(ap = ai; ap; ap = ap->ai_next)
253 tmp = realloc(socks, (num_socks + i) * sizeof(*socks));
255 krb5_warnx(context, "failed to reallocate %lu bytes",
256 (unsigned long)(num_socks + i) * sizeof(*socks));
260 for(ap = ai; ap; ap = ap->ai_next) {
262 int s = socket(ap->ai_family, ap->ai_socktype, ap->ai_protocol);
264 krb5_warn(context, errno, "socket");
267 #if defined(SO_REUSEADDR) && defined(HAVE_SETSOCKOPT)
268 if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void *)&one,
270 krb5_warn(context, errno, "setsockopt");
272 if (bind (s, ap->ai_addr, ap->ai_addrlen) < 0) {
273 krb5_warn(context, errno, "bind");
277 if (listen (s, SOMAXCONN) < 0) {
278 krb5_warn(context, errno, "listen");
282 socks[num_socks++] = s;
287 krb5_errx(context, 1, "no sockets to listen to - exiting");
288 return wait_for_connection(context, socks, num_socks);