2 * Copyright (c) 2000 - 2004 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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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
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);
72 * parse the set of space-delimited ports in `str' and add them.
73 * "+" => all the standard ones
74 * otherwise it's port|service[/protocol]
78 parse_ports(krb5_context context, const char *str)
82 while(strsep_copy(&str, " \t", p, sizeof(p)) != -1) {
83 if(strcmp(p, "+") == 0)
84 add_standard_ports(context);
86 add_kadm_port(context, p, 0);
91 sig_atomic_t term_flag, doing_useful_work;
97 waitpid(-1, &status, 0);
104 if(getpid() == pgrp) {
107 signal(sig, SIG_IGN);
111 if(doing_useful_work)
120 spawn_child(krb5_context context, int *socks,
121 unsigned int num_socks, int this_sock)
124 struct sockaddr_storage __ss;
125 struct sockaddr *sa = (struct sockaddr *)&__ss;
126 socklen_t sa_size = sizeof(__ss);
133 s = accept(socks[this_sock], sa, &sa_size);
135 krb5_warn(context, errno, "accept");
138 e = krb5_sockaddr2address(context, sa, &addr);
140 krb5_warn(context, e, "krb5_sockaddr2address");
142 e = krb5_print_address (&addr, buf, sizeof(buf),
145 krb5_warn(context, e, "krb5_print_address");
147 krb5_warnx(context, "connection from %s", buf);
148 krb5_free_address(context, &addr);
153 for(i = 0; i < num_socks; i++)
155 dup2(s, STDIN_FILENO);
156 dup2(s, STDOUT_FILENO);
157 if(s != STDIN_FILENO && s != STDOUT_FILENO)
167 wait_for_connection(krb5_context context,
168 int *socks, unsigned int num_socks)
172 fd_set orig_read_set, read_set;
175 FD_ZERO(&orig_read_set);
177 for(i = 0; i < num_socks; i++) {
178 if (socks[i] >= FD_SETSIZE)
179 errx (1, "fd too large");
180 FD_SET(socks[i], &orig_read_set);
181 max_fd = max(max_fd, socks[i]);
186 if(setpgid(0, pgrp) < 0)
189 signal(SIGTERM, terminate);
190 signal(SIGINT, terminate);
191 signal(SIGCHLD, sigchld);
193 while (term_flag == 0) {
194 read_set = orig_read_set;
195 e = select(max_fd + 1, &read_set, NULL, NULL, NULL);
198 krb5_warn(context, errno, "select");
200 krb5_warnx(context, "select returned 0");
202 for(i = 0; i < num_socks; i++) {
203 if(FD_ISSET(socks[i], &read_set))
204 if(spawn_child(context, socks, num_socks, i) == 0)
209 signal(SIGCHLD, SIG_IGN);
213 pid = waitpid(-1, &status, 0);
214 if(pid == -1 && errno == ECHILD)
222 start_server(krb5_context context)
227 int *socks = NULL, *tmp;
228 unsigned int num_socks = 0;
231 for(p = kadm_ports; p; p = p->next) {
232 struct addrinfo hints, *ai, *ap;
234 memset (&hints, 0, sizeof(hints));
235 hints.ai_flags = AI_PASSIVE;
236 hints.ai_socktype = SOCK_STREAM;
238 e = getaddrinfo(NULL, p->port, &hints, &ai);
240 snprintf(portstr, sizeof(portstr), "%u", p->def_port);
241 e = getaddrinfo(NULL, portstr, &hints, &ai);
245 krb5_warn(context, krb5_eai_to_heim_errno(e, errno),
250 for(ap = ai; ap; ap = ap->ai_next)
252 tmp = realloc(socks, (num_socks + i) * sizeof(*socks));
254 krb5_warnx(context, "failed to reallocate %lu bytes",
255 (unsigned long)(num_socks + i) * sizeof(*socks));
259 for(ap = ai; ap; ap = ap->ai_next) {
260 int s = socket(ap->ai_family, ap->ai_socktype, ap->ai_protocol);
262 krb5_warn(context, errno, "socket");
266 socket_set_reuseaddr(s, 1);
267 socket_set_ipv6only(s, 1);
269 if (bind (s, ap->ai_addr, ap->ai_addrlen) < 0) {
270 krb5_warn(context, errno, "bind");
274 if (listen (s, SOMAXCONN) < 0) {
275 krb5_warn(context, errno, "listen");
279 socks[num_socks++] = s;
284 krb5_errx(context, 1, "no sockets to listen to - exiting");
285 return wait_for_connection(context, socks, num_socks);