4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
36 #include <avahi-common/llist.h>
37 #include <avahi-common/malloc.h>
38 #include <avahi-common/alternative.h>
39 #include <avahi-common/error.h>
40 #include <avahi-core/log.h>
41 #include <avahi-core/publish.h>
44 #include "static-services.h"
46 typedef struct StaticService StaticService;
47 typedef struct StaticServiceGroup StaticServiceGroup;
49 struct StaticService {
50 StaticServiceGroup *group;
58 AvahiStringList *subtypes;
60 AvahiStringList *txt_records;
62 AVAHI_LLIST_FIELDS(StaticService, services);
65 struct StaticServiceGroup {
69 char *name, *chosen_name;
70 int replace_wildcards;
72 AvahiSEntryGroup *entry_group;
73 AVAHI_LLIST_HEAD(StaticService, services);
74 AVAHI_LLIST_FIELDS(StaticServiceGroup, groups);
77 static AVAHI_LLIST_HEAD(StaticServiceGroup, groups) = NULL;
79 static char *replacestr(const char *pattern, const char *a, const char *b) {
80 char *r = NULL, *e, *n;
82 while ((e = strstr(pattern, a))) {
85 k = avahi_strndup(pattern, e - pattern);
87 n = avahi_strdup_printf("%s%s%s", r, k, b);
89 n = avahi_strdup_printf("%s%s", k, b);
95 pattern = e + strlen(a);
99 return avahi_strdup(pattern);
101 n = avahi_strdup_printf("%s%s", r, pattern);
107 static void add_static_service_group_to_server(StaticServiceGroup *g);
108 static void remove_static_service_group_from_server(StaticServiceGroup *g);
110 static StaticService *static_service_new(StaticServiceGroup *group) {
114 s = avahi_new(StaticService, 1);
117 s->type = s->host_name = s->domain_name = NULL;
119 s->protocol = AVAHI_PROTO_UNSPEC;
121 s->txt_records = NULL;
124 AVAHI_LLIST_PREPEND(StaticService, services, group->services, s);
129 static StaticServiceGroup *static_service_group_new(char *filename) {
130 StaticServiceGroup *g;
133 g = avahi_new(StaticServiceGroup, 1);
134 g->filename = avahi_strdup(filename);
136 g->name = g->chosen_name = NULL;
137 g->replace_wildcards = 0;
138 g->entry_group = NULL;
140 AVAHI_LLIST_HEAD_INIT(StaticService, g->services);
141 AVAHI_LLIST_PREPEND(StaticServiceGroup, groups, groups, g);
146 static void static_service_free(StaticService *s) {
149 AVAHI_LLIST_REMOVE(StaticService, services, s->group->services, s);
152 avahi_free(s->host_name);
153 avahi_free(s->domain_name);
155 avahi_string_list_free(s->txt_records);
156 avahi_string_list_free(s->subtypes);
161 static void static_service_group_free(StaticServiceGroup *g) {
165 avahi_s_entry_group_free(g->entry_group);
168 static_service_free(g->services);
170 AVAHI_LLIST_REMOVE(StaticServiceGroup, groups, groups, g);
172 avahi_free(g->filename);
174 avahi_free(g->chosen_name);
178 static void entry_group_callback(AvahiServer *s, AVAHI_GCC_UNUSED AvahiSEntryGroup *eg, AvahiEntryGroupState state, void* userdata) {
179 StaticServiceGroup *g = userdata;
186 case AVAHI_ENTRY_GROUP_COLLISION: {
189 remove_static_service_group_from_server(g);
191 n = avahi_alternative_service_name(g->chosen_name);
192 avahi_free(g->chosen_name);
195 avahi_log_notice("Service name conflict for \"%s\" (%s), retrying with \"%s\".", g->name, g->filename, g->chosen_name);
197 add_static_service_group_to_server(g);
201 case AVAHI_ENTRY_GROUP_ESTABLISHED:
202 avahi_log_info("Service \"%s\" (%s) successfully established.", g->chosen_name, g->filename);
205 case AVAHI_ENTRY_GROUP_FAILURE:
206 avahi_log_warn("Failed to publish service \"%s\" (%s): %s", g->chosen_name, g->filename, avahi_strerror(avahi_server_errno(s)));
207 remove_static_service_group_from_server(g);
210 case AVAHI_ENTRY_GROUP_UNCOMMITED:
211 case AVAHI_ENTRY_GROUP_REGISTERING:
216 static void add_static_service_group_to_server(StaticServiceGroup *g) {
221 if (g->entry_group && !avahi_s_entry_group_is_empty(g->entry_group))
222 /* This service group is already registered in the server */
225 if (!g->chosen_name || (g->replace_wildcards && strstr(g->name, "%h"))) {
227 avahi_free(g->chosen_name);
229 if (g->replace_wildcards)
230 g->chosen_name = replacestr(g->name, "%h", avahi_server_get_host_name(avahi_server));
232 g->chosen_name = avahi_strdup(g->name);
237 g->entry_group = avahi_s_entry_group_new(avahi_server, entry_group_callback, g);
239 assert(avahi_s_entry_group_is_empty(g->entry_group));
241 for (s = g->services; s; s = s->services_next) {
244 if (avahi_server_add_service_strlst(
247 AVAHI_IF_UNSPEC, s->protocol,
249 g->chosen_name, s->type, s->domain_name,
250 s->host_name, s->port,
251 s->txt_records) < 0) {
252 avahi_log_error("Failed to add service '%s' of type '%s', ignoring service group (%s): %s",
253 g->chosen_name, s->type, g->filename,
254 avahi_strerror(avahi_server_errno(avahi_server)));
255 remove_static_service_group_from_server(g);
259 for (i = s->subtypes; i; i = i->next) {
261 if (avahi_server_add_service_subtype(
264 AVAHI_IF_UNSPEC, s->protocol,
266 g->chosen_name, s->type, s->domain_name,
267 (char*) i->text) < 0) {
269 avahi_log_error("Failed to add subtype '%s' for service '%s' of type '%s', ignoring subtype (%s): %s",
270 i->text, g->chosen_name, s->type, g->filename,
271 avahi_strerror(avahi_server_errno(avahi_server)));
276 avahi_s_entry_group_commit(g->entry_group);
279 static void remove_static_service_group_from_server(StaticServiceGroup *g) {
283 avahi_s_entry_group_reset(g->entry_group);
288 XML_TAG_SERVICE_GROUP,
299 struct xml_userdata {
300 StaticServiceGroup *group;
301 StaticService *service;
302 xml_tag_name current_tag;
311 static void XMLCALL xml_start(void *data, const char *el, const char *attr[]) {
312 struct xml_userdata *u = data;
319 if (u->current_tag == XML_TAG_INVALID && strcmp(el, "service-group") == 0) {
324 u->current_tag = XML_TAG_SERVICE_GROUP;
325 } else if (u->current_tag == XML_TAG_SERVICE_GROUP && strcmp(el, "name") == 0) {
326 u->current_tag = XML_TAG_NAME;
329 if (strcmp(attr[0], "replace-wildcards") == 0)
330 u->group->replace_wildcards = strcmp(attr[1], "yes") == 0;
338 } else if (u->current_tag == XML_TAG_SERVICE_GROUP && strcmp(el, "service") == 0) {
339 u->current_tag = XML_TAG_SERVICE;
342 u->service = static_service_new(u->group);
345 if (strcmp(attr[0], "protocol") == 0) {
346 AvahiProtocol protocol;
348 if (strcmp(attr[1], "ipv4") == 0) {
349 protocol = AVAHI_PROTO_INET;
350 } else if (strcmp(attr[1], "ipv6") == 0) {
351 protocol = AVAHI_PROTO_INET6;
352 } else if (strcmp(attr[1], "any") == 0) {
353 protocol = AVAHI_PROTO_UNSPEC;
355 avahi_log_error("%s: parse failure: invalid protocol specification \"%s\".", u->group->filename, attr[1]);
360 u->service->protocol = protocol;
368 } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "type") == 0) {
372 u->current_tag = XML_TAG_TYPE;
373 } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "subtype") == 0) {
377 u->current_tag = XML_TAG_SUBTYPE;
378 } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "domain-name") == 0) {
382 u->current_tag = XML_TAG_DOMAIN_NAME;
383 } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "host-name") == 0) {
387 u->current_tag = XML_TAG_HOST_NAME;
388 } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "port") == 0) {
392 u->current_tag = XML_TAG_PORT;
393 } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "txt-record") == 0) {
397 u->current_tag = XML_TAG_TXT_RECORD;
399 avahi_log_error("%s: parse failure: didn't expect element <%s>.", u->group->filename, el);
406 avahi_log_error("%s: parse failure: invalid attribute for element <%s>.", u->group->filename, el);
411 static void XMLCALL xml_end(void *data, AVAHI_GCC_UNUSED const char *el) {
412 struct xml_userdata *u = data;
418 switch (u->current_tag) {
419 case XML_TAG_SERVICE_GROUP:
421 if (!u->group->name || !u->group->services) {
422 avahi_log_error("%s: parse failure: service group incomplete.", u->group->filename);
427 u->current_tag = XML_TAG_INVALID;
430 case XML_TAG_SERVICE:
432 if (!u->service->type) {
433 avahi_log_error("%s: parse failure: service incomplete.", u->group->filename);
439 u->current_tag = XML_TAG_SERVICE_GROUP;
443 u->current_tag = XML_TAG_SERVICE_GROUP;
450 p = u->buf ? atoi(u->buf) : 0;
452 if (p < 0 || p > 0xFFFF) {
453 avahi_log_error("%s: parse failure: invalid port specification \"%s\".", u->group->filename, u->buf);
458 u->service->port = (uint16_t) p;
460 u->current_tag = XML_TAG_SERVICE;
464 case XML_TAG_TXT_RECORD: {
467 u->service->txt_records = avahi_string_list_add(u->service->txt_records, u->buf ? u->buf : "");
468 u->current_tag = XML_TAG_SERVICE;
472 case XML_TAG_SUBTYPE: {
475 u->service->subtypes = avahi_string_list_add(u->service->subtypes, u->buf ? u->buf : "");
476 u->current_tag = XML_TAG_SERVICE;
481 case XML_TAG_DOMAIN_NAME:
482 case XML_TAG_HOST_NAME:
483 u->current_tag = XML_TAG_SERVICE;
486 case XML_TAG_INVALID:
494 static char *append_cdata(char *t, const char *n, int length) {
501 k = avahi_strndup(n, length);
504 r = avahi_strdup_printf("%s%s", t, k);
513 static void XMLCALL xml_cdata(void *data, const XML_Char *s, int len) {
514 struct xml_userdata *u = data;
520 switch (u->current_tag) {
522 u->group->name = append_cdata(u->group->name, s, len);
527 u->service->type = append_cdata(u->service->type, s, len);
530 case XML_TAG_DOMAIN_NAME:
532 u->service->domain_name = append_cdata(u->service->domain_name, s, len);
535 case XML_TAG_HOST_NAME:
537 u->service->host_name = append_cdata(u->service->host_name, s, len);
541 case XML_TAG_TXT_RECORD:
542 case XML_TAG_SUBTYPE:
544 u->buf = append_cdata(u->buf, s, len);
547 case XML_TAG_SERVICE_GROUP:
548 case XML_TAG_SERVICE:
549 case XML_TAG_INVALID:
554 static int static_service_group_load(StaticServiceGroup *g) {
555 XML_Parser parser = NULL;
557 struct xml_userdata u;
567 u.current_tag = XML_TAG_INVALID;
570 /* Cleanup old data in this service group, if available */
571 remove_static_service_group_from_server(g);
573 static_service_free(g->services);
576 avahi_free(g->chosen_name);
577 g->name = g->chosen_name = NULL;
578 g->replace_wildcards = 0;
580 if (!(parser = XML_ParserCreate(NULL))) {
581 avahi_log_error("XML_ParserCreate() failed.");
585 if ((fd = open(g->filename, O_RDONLY)) < 0) {
586 avahi_log_error("open(\"%s\", O_RDONLY): %s", g->filename, strerror(errno));
590 if (fstat(fd, &st) < 0) {
591 avahi_log_error("fstat(): %s", strerror(errno));
595 g->mtime = st.st_mtime;
597 XML_SetUserData(parser, &u);
599 XML_SetElementHandler(parser, xml_start, xml_end);
600 XML_SetCharacterDataHandler(parser, xml_cdata);
605 #define BUFSIZE (10*1024)
607 if (!(buffer = XML_GetBuffer(parser, BUFSIZE))) {
608 avahi_log_error("XML_GetBuffer() failed.");
612 if ((n = read(fd, buffer, BUFSIZE)) < 0) {
613 avahi_log_error("read(): %s\n", strerror(errno));
617 if (!XML_ParseBuffer(parser, n, n == 0)) {
618 avahi_log_error("XML_ParseBuffer() failed at line %d: %s.\n", (int) XML_GetCurrentLineNumber(parser), XML_ErrorString(XML_GetErrorCode(parser)));
633 XML_ParserFree(parser);
640 static void load_file(char *n) {
641 StaticServiceGroup *g;
644 for (g = groups; g; g = g->groups_next)
645 if (strcmp(g->filename, n) == 0)
648 avahi_log_info("Loading service file %s.", n);
650 g = static_service_group_new(n);
651 if (static_service_group_load(g) < 0) {
652 avahi_log_error("Failed to load service group file %s, ignoring.", g->filename);
653 static_service_group_free(g);
657 void static_service_load(int in_chroot) {
658 StaticServiceGroup *g, *n;
663 for (g = groups; g; g = n) {
668 if (stat(g->filename, &st) < 0) {
671 avahi_log_info("Service group file %s vanished, removing services.", g->filename);
673 avahi_log_warn("Failed to stat() file %s, ignoring: %s", g->filename, strerror(errno));
675 static_service_group_free(g);
676 } else if (st.st_mtime != g->mtime) {
677 avahi_log_info("Service group file %s changed, reloading.", g->filename);
679 if (static_service_group_load(g) < 0) {
680 avahi_log_warn("Failed to load service group file %s, removing service.", g->filename);
681 static_service_group_free(g);
686 memset(&globbuf, 0, sizeof(globbuf));
687 if ((globret = glob(in_chroot ? "/services/*.service" : AVAHI_SERVICE_DIR "/*.service", GLOB_ERR, NULL, &globbuf)) != 0)
690 avahi_log_error("Not enough memory to read service directory.");
694 avahi_log_error("Failed to read %s.", AVAHI_SERVICE_DIR);
698 avahi_log_info("No service found in %s.", AVAHI_SERVICE_DIR);
702 for (p = globbuf.gl_pathv; *p; p++)
709 void static_service_free_all(void) {
712 static_service_group_free(groups);
715 void static_service_add_to_server(void) {
716 StaticServiceGroup *g;
718 for (g = groups; g; g = g->groups_next)
719 add_static_service_group_to_server(g);
722 void static_service_remove_from_server(void) {
723 StaticServiceGroup *g;
725 for (g = groups; g; g = g->groups_next)
726 remove_static_service_group_from_server(g);