--- /dev/null
+/* $Id$ */
+
+/***
+ This file is part of avahi.
+
+ avahi is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ avahi is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
+ Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with avahi; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/stat.h>
+#include <glob.h>
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <glib.h>
+#include <expat.h>
+
+#include <avahi-core/llist.h>
+
+#include "main.h"
+
+typedef struct StaticService StaticService;
+typedef struct StaticServiceGroup StaticServiceGroup;
+
+struct StaticService {
+ StaticServiceGroup *group;
+
+ gchar *type;
+ gchar *domain_name;
+ gchar *host_name;
+ guint16 port;
+
+ AvahiStringList *txt_records;
+
+ AVAHI_LLIST_FIELDS(StaticService, services);
+};
+
+struct StaticServiceGroup {
+ gchar *filename;
+ time_t mtime;
+
+ gchar *name, *chosen_name;
+ gboolean replace_wildcards;
+
+ AvahiEntryGroup *entry_group;
+ AVAHI_LLIST_HEAD(StaticService, services);
+ AVAHI_LLIST_FIELDS(StaticServiceGroup, groups);
+};
+
+static AVAHI_LLIST_HEAD(StaticServiceGroup, groups) = NULL;
+
+static gchar *replacestr(const gchar *pattern, const gchar *a, const gchar *b) {
+ gchar *r = NULL, *e, *n;
+
+ while ((e = strstr(pattern, a))) {
+ gchar *k;
+
+ k = g_strndup(pattern, e - pattern);
+ if (r)
+ n = g_strconcat(r, k, b, NULL);
+ else
+ n = g_strconcat(k, b, NULL);
+
+ g_free(k);
+ g_free(r);
+ r = n;
+
+ pattern = e + strlen(a);
+ }
+
+ if (!r)
+ return g_strdup(pattern);
+
+ n = g_strconcat(r, pattern, NULL);
+ g_free(r);
+
+ return n;
+}
+
+static void add_static_service_group_to_server(StaticServiceGroup *g);
+static void remove_static_service_group_from_server(StaticServiceGroup *g);
+
+static StaticService *static_service_new(StaticServiceGroup *group) {
+ StaticService *s;
+
+ g_assert(group);
+ s = g_new(StaticService, 1);
+ s->group = group;
+
+ s->type = s->host_name = s->domain_name = NULL;
+ s->port = 0;
+
+ s->txt_records = NULL;
+
+ AVAHI_LLIST_PREPEND(StaticService, services, group->services, s);
+
+ return s;
+}
+
+static StaticServiceGroup *static_service_group_new(gchar *filename) {
+ StaticServiceGroup *g;
+ g_assert(filename);
+
+ g = g_new(StaticServiceGroup, 1);
+ g->filename = g_strdup(filename);
+ g->mtime = 0;
+ g->name = g->chosen_name = NULL;
+ g->replace_wildcards = FALSE;
+ g->entry_group = NULL;
+
+ AVAHI_LLIST_HEAD_INIT(StaticService, g->services);
+ AVAHI_LLIST_PREPEND(StaticServiceGroup, groups, groups, g);
+
+ return g;
+}
+
+static void static_service_free(StaticService *s) {
+ g_assert(s);
+
+ AVAHI_LLIST_REMOVE(StaticService, services, s->group->services, s);
+
+ g_free(s->type);
+ g_free(s->host_name);
+ g_free(s->domain_name);
+
+ avahi_string_list_free(s->txt_records);
+
+ g_free(s);
+}
+
+static void static_service_group_free(StaticServiceGroup *g) {
+ g_assert(g);
+
+ remove_static_service_group_from_server(g);
+
+ while (g->services)
+ static_service_free(g->services);
+
+ AVAHI_LLIST_REMOVE(StaticServiceGroup, groups, groups, g);
+
+ g_free(g->filename);
+ g_free(g->name);
+ g_free(g->chosen_name);
+ g_free(g);
+}
+
+static void entry_group_callback(AvahiServer *s, AvahiEntryGroup *eg, AvahiEntryGroupState state, gpointer userdata) {
+ StaticServiceGroup *g = userdata;
+
+ g_assert(s);
+ g_assert(g);
+
+ if (state == AVAHI_ENTRY_GROUP_COLLISION) {
+ gchar *n;
+
+ remove_static_service_group_from_server(g);
+
+ n = avahi_alternative_service_name(g->chosen_name);
+ g_free(g->chosen_name);
+ g->chosen_name = n;
+
+ g_message("Service name conflict for \"%s\" (%s), retrying with \"%s\".", g->name, g->filename, g->chosen_name);
+
+ add_static_service_group_to_server(g);
+ } else
+ g_message("Service \"%s\" (%s) successfully establised.", g->chosen_name, g->filename);
+}
+
+static void add_static_service_group_to_server(StaticServiceGroup *g) {
+ StaticService *s;
+
+ g_assert(g);
+
+ if (g->entry_group)
+ return;
+
+ if (g->chosen_name)
+ g_free(g->chosen_name);
+
+ if (g->replace_wildcards)
+ g->chosen_name = replacestr(g->name, "%h", avahi_server_get_host_name(avahi_server));
+ else
+ g->chosen_name = g_strdup(g->name);
+
+ g->entry_group = avahi_entry_group_new(avahi_server, entry_group_callback, g);
+
+ for (s = g->services; s; s = s->services_next) {
+
+ if (avahi_server_add_service_strlst(
+ avahi_server,
+ g->entry_group,
+ -1, AF_UNSPEC,
+ s->type, g->chosen_name,
+ s->domain_name, s->host_name, s->port,
+ s->txt_records) < 0) {
+ g_message("Failed to add service '%s' of type '%s', ignoring service group (%s)", g->chosen_name, s->type, g->filename);
+ remove_static_service_group_from_server(g);
+ return;
+ }
+ }
+
+ avahi_entry_group_commit(g->entry_group);
+}
+
+static void remove_static_service_group_from_server(StaticServiceGroup *g) {
+ g_assert(g);
+
+ if (g->entry_group) {
+ avahi_entry_group_free(g->entry_group);
+ g->entry_group = NULL;
+ }
+}
+
+typedef enum {
+ XML_TAG_INVALID,
+ XML_TAG_SERVICE_GROUP,
+ XML_TAG_NAME,
+ XML_TAG_SERVICE,
+ XML_TAG_TYPE,
+ XML_TAG_DOMAIN_NAME,
+ XML_TAG_HOST_NAME,
+ XML_TAG_PORT,
+ XML_TAG_TXT_RECORD
+} xml_tag_name;
+
+struct xml_userdata {
+ StaticServiceGroup *group;
+ StaticService *service;
+ xml_tag_name current_tag;
+ gboolean failed;
+ gchar *buf;
+};
+
+static void XMLCALL xml_start(void *data, const char *el, const char *attr[]) {
+ struct xml_userdata *u = data;
+
+ g_assert(u);
+
+ if (u->failed)
+ return;
+
+ if (u->current_tag == XML_TAG_INVALID && strcmp(el, "service-group") == 0) {
+
+ if (attr[0])
+ goto invalid_attr;
+
+ u->current_tag = XML_TAG_SERVICE_GROUP;
+ } else if (u->current_tag == XML_TAG_SERVICE_GROUP && strcmp(el, "name") == 0) {
+ u->current_tag = XML_TAG_NAME;
+
+ if (attr[0]) {
+ if (strcmp(attr[0], "replace-wildcards") == 0)
+ u->group->replace_wildcards = strcmp(attr[1], "yes") == 0;
+ else
+ goto invalid_attr;
+ }
+
+ if (attr[2])
+ goto invalid_attr;
+
+
+
+ } else if (u->current_tag == XML_TAG_SERVICE_GROUP && strcmp(el, "service") == 0) {
+ if (attr[0])
+ goto invalid_attr;
+
+ g_assert(!u->service);
+ u->service = static_service_new(u->group);
+
+ u->current_tag = XML_TAG_SERVICE;
+ } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "type") == 0) {
+ if (attr[0])
+ goto invalid_attr;
+
+ u->current_tag = XML_TAG_TYPE;
+ } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "domain-name") == 0) {
+ if (attr[0])
+ goto invalid_attr;
+
+ u->current_tag = XML_TAG_DOMAIN_NAME;
+ } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "host-name") == 0) {
+ if (attr[0])
+ goto invalid_attr;
+
+ u->current_tag = XML_TAG_HOST_NAME;
+ } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "port") == 0) {
+ if (attr[0])
+ goto invalid_attr;
+
+ u->current_tag = XML_TAG_PORT;
+ } else if (u->current_tag == XML_TAG_SERVICE && strcmp(el, "txt-record") == 0) {
+ if (attr[0])
+ goto invalid_attr;
+
+ u->current_tag = XML_TAG_TXT_RECORD;
+ } else {
+ g_message("%s: parse failure: didn't expect element <%s>.", u->group->filename, el);
+ u->failed = TRUE;
+ }
+
+ return;
+
+invalid_attr:
+ g_message("%s: parse failure: invalid attribute for element <%s>.", u->group->filename, el);
+ u->failed = TRUE;
+ return;
+}
+
+static void XMLCALL xml_end(void *data, const char *el) {
+ struct xml_userdata *u = data;
+ g_assert(u);
+
+ if (u->failed)
+ return;
+
+ switch (u->current_tag) {
+ case XML_TAG_SERVICE_GROUP:
+
+ if (!u->group->name || !u->group->services) {
+ g_message("%s: parse failure: service group incomplete.", u->group->filename);
+ u->failed = TRUE;
+ return;
+ }
+
+ u->current_tag = XML_TAG_INVALID;
+ break;
+
+ case XML_TAG_SERVICE:
+
+ if (u->service->port == 0 || !u->service->type) {
+ g_message("%s: parse failure: service incomplete.", u->group->filename);
+ u->failed = TRUE;
+ return;
+ }
+
+ u->service = NULL;
+ u->current_tag = XML_TAG_SERVICE_GROUP;
+ break;
+
+ case XML_TAG_NAME:
+ u->current_tag = XML_TAG_SERVICE_GROUP;
+ break;
+
+ case XML_TAG_PORT: {
+ int p;
+ g_assert(u->service);
+
+ p = u->buf ? atoi(u->buf) : 0;
+
+ if (p <= 0 || p > 0xFFFF) {
+ g_message("%s: parse failure: invalid port specification \"%s\".", u->group->filename, u->buf);
+ u->failed = TRUE;
+ return;
+ }
+
+ u->service->port = (guint16) p;
+
+ u->current_tag = XML_TAG_SERVICE;
+ break;
+ }
+
+ case XML_TAG_TXT_RECORD: {
+ g_assert(u->service);
+
+ u->service->txt_records = avahi_string_list_add(u->service->txt_records, u->buf ? u->buf : "");
+ u->current_tag = XML_TAG_SERVICE;
+ break;
+ }
+
+ case XML_TAG_TYPE:
+ case XML_TAG_DOMAIN_NAME:
+ case XML_TAG_HOST_NAME:
+ u->current_tag = XML_TAG_SERVICE;
+ break;
+
+ case XML_TAG_INVALID:
+ ;
+ }
+
+ g_free(u->buf);
+ u->buf = NULL;
+}
+
+static gchar *append_cdata(gchar *t, const gchar *n, int length) {
+ gchar *r, *k;
+
+ if (!length)
+ return t;
+
+ k = g_strndup(n, length);
+
+ if (t) {
+ r = g_strconcat(t, k, NULL);
+ g_free(k);
+ g_free(t);
+ } else
+ r = k;
+
+ return r;
+}
+
+static void XMLCALL xml_cdata(void *data, const XML_Char *s, int len) {
+ struct xml_userdata *u = data;
+ g_assert(u);
+
+ if (u->failed)
+ return;
+
+ switch (u->current_tag) {
+ case XML_TAG_NAME:
+ u->group->name = append_cdata(u->group->name, s, len);
+ break;
+
+ case XML_TAG_TYPE:
+ g_assert(u->service);
+ u->service->type = append_cdata(u->service->type, s, len);
+ break;
+
+ case XML_TAG_DOMAIN_NAME:
+ g_assert(u->service);
+ u->service->domain_name = append_cdata(u->service->domain_name, s, len);
+ break;
+
+ case XML_TAG_HOST_NAME:
+ g_assert(u->service);
+ u->service->host_name = append_cdata(u->service->host_name, s, len);
+ break;
+
+ case XML_TAG_PORT:
+ case XML_TAG_TXT_RECORD:
+ u->buf = append_cdata(u->buf, s, len);
+ break;
+
+ case XML_TAG_SERVICE_GROUP:
+ case XML_TAG_SERVICE:
+ case XML_TAG_INVALID:
+ ;
+ }
+}
+
+static gint static_service_group_load(StaticServiceGroup *g) {
+ XML_Parser parser = NULL;
+ gint fd = -1;
+ struct xml_userdata u;
+ gint r = -1;
+ struct stat st;
+ ssize_t n;
+
+ g_assert(g);
+
+ u.buf = NULL;
+ u.group = g;
+ u.service = NULL;
+ u.current_tag = XML_TAG_INVALID;
+ u.failed = FALSE;
+
+ /* Cleanup old data in this service group, if available */
+ remove_static_service_group_from_server(g);
+ while (g->services)
+ static_service_free(g->services);
+
+ g_free(g->name);
+ g_free(g->chosen_name);
+ g->name = g->chosen_name = NULL;
+ g->replace_wildcards = FALSE;
+
+ if (!(parser = XML_ParserCreate(NULL))) {
+ g_warning("XML_ParserCreate() failed.");
+ goto finish;
+ }
+
+ if ((fd = open(g->filename, O_RDONLY)) < 0) {
+ g_warning("open(\"%s\", O_RDONLY): %s", g->filename, strerror(errno));
+ goto finish;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ g_warning("fstat(): %s", strerror(errno));
+ goto finish;
+ }
+
+ g->mtime = st.st_mtime;
+
+ XML_SetUserData(parser, &u);
+
+ XML_SetElementHandler(parser, xml_start, xml_end);
+ XML_SetCharacterDataHandler(parser, xml_cdata);
+
+ do {
+ void *buffer;
+
+#define BUFSIZE (10*1024)
+
+ if (!(buffer = XML_GetBuffer(parser, BUFSIZE))) {
+ g_warning("XML_GetBuffer() failed.");
+ goto finish;
+ }
+
+ if ((n = read(fd, buffer, BUFSIZE)) < 0) {
+ g_warning("read(): %s\n", strerror(errno));
+ goto finish;
+ }
+
+ if (!XML_ParseBuffer(parser, n, n == 0)) {
+ g_warning("XML_ParseBuffer() failed at line %d: %s.\n", XML_GetCurrentLineNumber(parser), XML_ErrorString(XML_GetErrorCode(parser)));
+ goto finish;
+ }
+
+ } while (n != 0);
+
+ if (!u.failed)
+ r = 0;
+
+finish:
+
+ if (fd >= 0)
+ close(fd);
+
+ if (parser)
+ XML_ParserFree(parser);
+
+ g_free(u.buf);
+
+ return r;
+}
+
+static void load_file(gchar *n) {
+ StaticServiceGroup *g;
+ g_assert(n);
+
+ for (g = groups; g; g = g->groups_next)
+ if (strcmp(g->filename, n) == 0)
+ return;
+
+ g = static_service_group_new(n);
+ if (static_service_group_load(g) < 0) {
+ g_warning("Failed to load service group file %s, ignoring.", g->filename);
+ static_service_group_free(g);
+ }
+}
+
+void static_service_load(void) {
+ StaticServiceGroup *g, *n;
+ glob_t globbuf;
+ gchar **p;
+
+ for (g = groups; g; g = n) {
+ struct stat st;
+
+ n = g->groups_next;
+
+ if (stat(g->filename, &st) < 0) {
+
+ if (errno == ENOENT)
+ g_message("Service group file %s vanished, removing seervices.", g->filename);
+ else
+ g_warning("Failed to stat() file %s, ignoring: %s", g->filename, strerror(errno));
+
+ static_service_group_free(g);
+ } else if (st.st_mtime != g->mtime) {
+ g_message("Service group file %s changed, reloading.", g->filename);
+
+ if (static_service_group_load(g) < 0) {
+ g_warning("Failed to load service group file %s, removing service.", g->filename);
+ static_service_group_free(g);
+ }
+ }
+ }
+
+ memset(&globbuf, 0, sizeof(globbuf));
+ if (glob(AVAHI_SERVICE_DIRECTORY "/*.service", GLOB_ERR, NULL, &globbuf) != 0)
+ g_warning("glob() failed.\n");
+ else {
+ for (p = globbuf.gl_pathv; *p; p++)
+ load_file(*p);
+
+ globfree(&globbuf);
+ }
+}
+
+void static_service_free_all(void) {
+
+ while (groups)
+ static_service_group_free(groups);
+}
+
+void static_service_add_to_server(void) {
+ StaticServiceGroup *g;
+
+ for (g = groups; g; g = g->groups_next)
+ add_static_service_group_to_server(g);
+}
+
+void static_service_remove_from_server(void) {
+ StaticServiceGroup *g;
+
+ for (g = groups; g; g = g->groups_next)
+ remove_static_service_group_from_server(g);
+}
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