2 * Copyright (c) 2000 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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7 * modification, are permitted provided that the following conditions
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11 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in the
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34 #include "kadmin_locl.h"
35 #ifdef HAVE_SYS_WAIT_H
39 RCSID("$Id: kadm_conn.c,v 1.14 2002/10/21 13:21:24 joda 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);
65 extern int do_kerberos4;
68 add_standard_ports (krb5_context context)
70 add_kadm_port(context, "kerberos-adm", 749);
73 add_kadm_port(context, "kerberos-master", 751);
78 * parse the set of space-delimited ports in `str' and add them.
79 * "+" => all the standard ones
80 * otherwise it's port|service[/protocol]
84 parse_ports(krb5_context context, const char *str)
88 while(strsep_copy(&str, " \t", p, sizeof(p)) != -1) {
89 if(strcmp(p, "+") == 0)
90 add_standard_ports(context);
92 add_kadm_port(context, p, 0);
97 sig_atomic_t term_flag, doing_useful_work;
103 waitpid(-1, &status, 0);
110 if(getpid() == pgrp) {
113 signal(sig, SIG_IGN);
117 if(doing_useful_work)
126 spawn_child(krb5_context context, int *socks, int num_socks, int this_sock)
129 struct sockaddr_storage __ss;
130 struct sockaddr *sa = (struct sockaddr *)&__ss;
131 socklen_t sa_size = sizeof(__ss);
138 s = accept(socks[this_sock], sa, &sa_size);
140 krb5_warn(context, errno, "accept");
143 e = krb5_sockaddr2address(context, sa, &addr);
145 krb5_warn(context, e, "krb5_sockaddr2address");
147 e = krb5_print_address (&addr, buf, sizeof(buf),
150 krb5_warn(context, e, "krb5_print_address");
152 krb5_warnx(context, "connection from %s", buf);
153 krb5_free_address(context, &addr);
158 for(i = 0; i < num_socks; i++)
160 dup2(s, STDIN_FILENO);
161 dup2(s, STDOUT_FILENO);
162 if(s != STDIN_FILENO && s != STDOUT_FILENO)
172 wait_for_connection(krb5_context context,
173 int *socks, int num_socks)
176 fd_set orig_read_set, read_set;
179 FD_ZERO(&orig_read_set);
181 for(i = 0; i < num_socks; i++) {
182 if (socks[i] >= FD_SETSIZE)
183 errx (1, "fd too large");
184 FD_SET(socks[i], &orig_read_set);
185 max_fd = max(max_fd, socks[i]);
190 if(setpgid(0, pgrp) < 0)
193 signal(SIGTERM, terminate);
194 signal(SIGINT, terminate);
195 signal(SIGCHLD, sigchld);
197 while (term_flag == 0) {
198 read_set = orig_read_set;
199 e = select(max_fd + 1, &read_set, NULL, NULL, NULL);
202 krb5_warn(context, errno, "select");
204 krb5_warnx(context, "select returned 0");
206 for(i = 0; i < num_socks; i++) {
207 if(FD_ISSET(socks[i], &read_set))
208 if(spawn_child(context, socks, num_socks, i) == 0)
213 signal(SIGCHLD, SIG_IGN);
217 pid = waitpid(-1, &status, 0);
218 if(pid == -1 && errno == ECHILD)
226 start_server(krb5_context context)
231 int *socks = NULL, *tmp;
235 for(p = kadm_ports; p; p = p->next) {
236 struct addrinfo hints, *ai, *ap;
238 memset (&hints, 0, sizeof(hints));
239 hints.ai_flags = AI_PASSIVE;
240 hints.ai_socktype = SOCK_STREAM;
242 e = getaddrinfo(NULL, p->port, &hints, &ai);
244 snprintf(portstr, sizeof(portstr), "%u", p->def_port);
245 e = getaddrinfo(NULL, portstr, &hints, &ai);
249 krb5_warn(context, krb5_eai_to_heim_errno(e, errno),
254 for(ap = ai; ap; ap = ap->ai_next)
256 tmp = realloc(socks, (num_socks + i) * sizeof(*socks));
258 krb5_warnx(context, "failed to reallocate %lu bytes",
259 (unsigned long)(num_socks + i) * sizeof(*socks));
263 for(ap = ai; ap; ap = ap->ai_next) {
265 int s = socket(ap->ai_family, ap->ai_socktype, ap->ai_protocol);
267 krb5_warn(context, errno, "socket");
270 #if defined(SO_REUSEADDR) && defined(HAVE_SETSOCKOPT)
271 if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void *)&one,
273 krb5_warn(context, errno, "setsockopt");
275 if (bind (s, ap->ai_addr, ap->ai_addrlen) < 0) {
276 krb5_warn(context, errno, "bind");
280 if (listen (s, SOMAXCONN) < 0) {
281 krb5_warn(context, errno, "listen");
285 socks[num_socks++] = s;
290 krb5_errx(context, 1, "no sockets to listen to - exiting");
291 return wait_for_connection(context, socks, num_socks);