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3 * (Royal Institute of Technology, Stockholm, Sweden).
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34 #include "kadmin_locl.h"
35 #ifdef HAVE_SYS_WAIT_H
39 RCSID("$Id: kadm_conn.c 16007 2005-09-01 18:49:57Z lha $");
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, int num_socks, int this_sock)
123 struct sockaddr_storage __ss;
124 struct sockaddr *sa = (struct sockaddr *)&__ss;
125 socklen_t sa_size = sizeof(__ss);
132 s = accept(socks[this_sock], sa, &sa_size);
134 krb5_warn(context, errno, "accept");
137 e = krb5_sockaddr2address(context, sa, &addr);
139 krb5_warn(context, e, "krb5_sockaddr2address");
141 e = krb5_print_address (&addr, buf, sizeof(buf),
144 krb5_warn(context, e, "krb5_print_address");
146 krb5_warnx(context, "connection from %s", buf);
147 krb5_free_address(context, &addr);
152 for(i = 0; i < num_socks; i++)
154 dup2(s, STDIN_FILENO);
155 dup2(s, STDOUT_FILENO);
156 if(s != STDIN_FILENO && s != STDOUT_FILENO)
166 wait_for_connection(krb5_context context,
167 int *socks, int num_socks)
170 fd_set orig_read_set, read_set;
173 FD_ZERO(&orig_read_set);
175 for(i = 0; i < num_socks; i++) {
176 if (socks[i] >= FD_SETSIZE)
177 errx (1, "fd too large");
178 FD_SET(socks[i], &orig_read_set);
179 max_fd = max(max_fd, socks[i]);
184 if(setpgid(0, pgrp) < 0)
187 signal(SIGTERM, terminate);
188 signal(SIGINT, terminate);
189 signal(SIGCHLD, sigchld);
191 while (term_flag == 0) {
192 read_set = orig_read_set;
193 e = select(max_fd + 1, &read_set, NULL, NULL, NULL);
196 krb5_warn(context, errno, "select");
198 krb5_warnx(context, "select returned 0");
200 for(i = 0; i < num_socks; i++) {
201 if(FD_ISSET(socks[i], &read_set))
202 if(spawn_child(context, socks, num_socks, i) == 0)
207 signal(SIGCHLD, SIG_IGN);
211 pid = waitpid(-1, &status, 0);
212 if(pid == -1 && errno == ECHILD)
220 start_server(krb5_context context)
225 int *socks = NULL, *tmp;
229 for(p = kadm_ports; p; p = p->next) {
230 struct addrinfo hints, *ai, *ap;
232 memset (&hints, 0, sizeof(hints));
233 hints.ai_flags = AI_PASSIVE;
234 hints.ai_socktype = SOCK_STREAM;
236 e = getaddrinfo(NULL, p->port, &hints, &ai);
238 snprintf(portstr, sizeof(portstr), "%u", p->def_port);
239 e = getaddrinfo(NULL, portstr, &hints, &ai);
243 krb5_warn(context, krb5_eai_to_heim_errno(e, errno),
248 for(ap = ai; ap; ap = ap->ai_next)
250 tmp = realloc(socks, (num_socks + i) * sizeof(*socks));
252 krb5_warnx(context, "failed to reallocate %lu bytes",
253 (unsigned long)(num_socks + i) * sizeof(*socks));
257 for(ap = ai; ap; ap = ap->ai_next) {
258 int s = socket(ap->ai_family, ap->ai_socktype, ap->ai_protocol);
260 krb5_warn(context, errno, "socket");
264 socket_set_reuseaddr(s, 1);
265 socket_set_ipv6only(s, 1);
267 if (bind (s, ap->ai_addr, ap->ai_addrlen) < 0) {
268 krb5_warn(context, errno, "bind");
272 if (listen (s, SOMAXCONN) < 0) {
273 krb5_warn(context, errno, "listen");
277 socks[num_socks++] = s;
282 krb5_errx(context, 1, "no sockets to listen to - exiting");
283 return wait_for_connection(context, socks, num_socks);