2 This file is part of avahi.
4 avahi is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
9 avahi is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12 Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with avahi; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 #include <avahi-common/llist.h>
29 #include <avahi-common/malloc.h>
30 #include <avahi-common/error.h>
31 #include <avahi-core/log.h>
32 #include <avahi-core/publish.h>
35 #include "static-hosts.h"
37 typedef struct StaticHost StaticHost;
40 AvahiSEntryGroup *group;
46 AVAHI_LLIST_FIELDS(StaticHost, hosts);
49 static AVAHI_LLIST_HEAD(StaticHost, hosts) = NULL;
50 static int current_iteration = 0;
52 static void add_static_host_to_server(StaticHost *h);
53 static void remove_static_host_from_server(StaticHost *h);
55 static void entry_group_callback(AvahiServer *s, AVAHI_GCC_UNUSED AvahiSEntryGroup *eg, AvahiEntryGroupState state, void* userdata) {
65 case AVAHI_ENTRY_GROUP_COLLISION:
66 avahi_log_error("Host name conflict for \"%s\", not established.", h->host);
69 case AVAHI_ENTRY_GROUP_ESTABLISHED:
70 avahi_log_notice ("Static host name \"%s\" successfully established.", h->host);
73 case AVAHI_ENTRY_GROUP_FAILURE:
74 avahi_log_notice ("Failed to establish static host name \"%s\": %s.", h->host, avahi_strerror (avahi_server_errno (s)));
77 case AVAHI_ENTRY_GROUP_UNCOMMITED:
78 case AVAHI_ENTRY_GROUP_REGISTERING:
83 static StaticHost *static_host_new(void) {
86 s = avahi_new(StaticHost, 1);
90 s->iteration = current_iteration;
92 AVAHI_LLIST_PREPEND(StaticHost, hosts, hosts, s);
97 static void static_host_free(StaticHost *s) {
100 AVAHI_LLIST_REMOVE(StaticHost, hosts, hosts, s);
103 avahi_s_entry_group_free (s->group);
110 static StaticHost *static_host_find(const char *host, const AvahiAddress *a) {
116 for (h = hosts; h; h = h->hosts_next)
117 if (!strcmp(h->host, host) && !avahi_address_cmp(a, &h->address))
123 static void add_static_host_to_server(StaticHost *h)
127 if (!(h->group = avahi_s_entry_group_new (avahi_server, entry_group_callback, h))) {
128 avahi_log_error("avahi_s_entry_group_new() failed: %s", avahi_strerror(avahi_server_errno(avahi_server)));
132 if (avahi_s_entry_group_is_empty(h->group)) {
135 const AvahiServerConfig *config;
136 config = avahi_server_get_config(avahi_server);
138 p = (h->address.proto == AVAHI_PROTO_INET && config->publish_a_on_ipv6) ||
139 (h->address.proto == AVAHI_PROTO_INET6 && config->publish_aaaa_on_ipv4) ? AVAHI_PROTO_UNSPEC : h->address.proto;
141 if ((err = avahi_server_add_address(avahi_server, h->group, AVAHI_IF_UNSPEC, p, 0, h->host, &h->address)) < 0) {
142 avahi_log_error ("Static host name %s: avahi_server_add_address failure: %s", h->host, avahi_strerror(err));
146 avahi_s_entry_group_commit (h->group);
150 static void remove_static_host_from_server(StaticHost *h)
153 avahi_s_entry_group_reset (h->group);
156 void static_hosts_add_to_server(void) {
159 for (h = hosts; h; h = h->hosts_next)
160 add_static_host_to_server(h);
163 void static_hosts_remove_from_server(void) {
166 for (h = hosts; h; h = h->hosts_next)
167 remove_static_host_from_server(h);
170 void static_hosts_load(int in_chroot) {
172 unsigned int line = 0;
173 StaticHost *h, *next;
174 const char *filename = in_chroot ? "/hosts" : AVAHI_CONFIG_DIR "/hosts";
176 if (!(f = fopen(filename, "r"))) {
178 avahi_log_error ("Failed to open static hosts file: %s", strerror (errno));
190 if (!fgets(ln, sizeof (ln), f))
195 /* Find the start of the line, ignore whitespace */
196 s = ln + strspn(ln, " \t");
197 /* Set the end of the string to NULL */
198 s[strcspn(s, "#\r\n")] = 0;
200 /* Ignore blank lines */
204 /* Read the first string (ip) up to the next whitespace */
205 len = strcspn(s, " \t");
206 ip = avahi_strndup(s, len);
211 /* Find the next token */
212 s += strspn(s, " \t");
213 len = strcspn(s, " \t");
214 host = avahi_strndup(s, len);
218 avahi_log_error("%s:%d: Error, unexpected end of line!", filename, line);
224 /* Skip over the host */
227 /* Skip past any more spaces */
228 s += strspn(s, " \t");
232 avahi_log_error ("%s:%d: Junk on the end of the line!", filename, line);
238 if (!avahi_address_parse(ip, AVAHI_PROTO_UNSPEC, &a)) {
239 avahi_log_error("Static host name %s: failed to parse address %s", host, ip);
247 if ((h = static_host_find(host, &a)))
250 h = static_host_new();
254 avahi_log_info("Loading new static hostname %s.", h->host);
257 h->iteration = current_iteration;
260 for (h = hosts; h; h = next) {
261 next = h->hosts_next;
263 if (h->iteration != current_iteration) {
264 avahi_log_info("Static hostname %s vanished, removing.", h->host);
274 void static_hosts_free_all (void)
277 static_host_free(hosts);