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android_mt6572_jiabo/external/avahi/avahi-compat-howl/compat.c
FuQuan 3ff2876a30 first commit
2025-09-05 16:56:03 +08:00

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/***
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 <assert.h>
#include <pthread.h>
#include <avahi-common/strlst.h>
#include "avahi-common/avahi-malloc.h"
#include <avahi-common/domain.h>
#include <avahi-common/simple-watch.h>
#include <avahi-common/error.h>
#include <avahi-common/llist.h>
#include <avahi-client/client.h>
#include <avahi-client/publish.h>
#include <avahi-client/lookup.h>
#include "howl.h"
#include "warn.h"
#define OID_MAX 50
enum {
COMMAND_POLL = 'p',
COMMAND_QUIT = 'q',
COMMAND_POLL_DONE = 'P',
COMMAND_POLL_FAILED = 'F'
};
typedef enum {
OID_UNUSED = 0,
OID_SERVICE_BROWSER,
OID_SERVICE_RESOLVER,
OID_DOMAIN_BROWSER,
OID_ENTRY_GROUP
} oid_type;
typedef struct service_data service_data;
typedef struct oid_data {
oid_type type;
sw_opaque extra;
sw_discovery discovery;
void *object;
sw_result (*reply)(void);
service_data *service_data;
} oid_data;
struct service_data {
char *name, *regtype, *domain, *host;
uint16_t port;
AvahiIfIndex interface;
AvahiStringList *txt;
AVAHI_LLIST_FIELDS(service_data, services);
};
struct _sw_discovery {
int n_ref;
AvahiSimplePoll *simple_poll;
AvahiClient *client;
oid_data oid_table[OID_MAX];
sw_discovery_oid oid_index;
int thread_fd, main_fd;
pthread_t thread;
int thread_running;
pthread_mutex_t mutex, salt_mutex;
AVAHI_LLIST_HEAD(service_data, services);
};
#define ASSERT_SUCCESS(r) { int __ret = (r); assert(__ret == 0); }
#define OID_GET_INDEX(data) ((sw_discovery_oid) (((data) - ((data)->discovery->oid_table))))
static sw_discovery discovery_ref(sw_discovery self);
static void discovery_unref(sw_discovery self);
static const char *add_trailing_dot(const char *s, char *buf, size_t buf_len) {
if (!s)
return NULL;
if (*s == 0)
return s;
if (s[strlen(s)-1] == '.')
return s;
snprintf(buf, buf_len, "%s.", s);
return buf;
}
static sw_result map_error(int error) {
switch (error) {
case AVAHI_OK:
return SW_OKAY;
case AVAHI_ERR_NO_MEMORY:
return SW_E_MEM;
}
return SW_E_UNKNOWN;
}
static int read_command(int fd) {
ssize_t r;
char command;
assert(fd >= 0);
if ((r = read(fd, &command, 1)) != 1) {
fprintf(stderr, __FILE__": read() failed: %s\n", r < 0 ? strerror(errno) : "EOF");
return -1;
}
return command;
}
static int write_command(int fd, char reply) {
assert(fd >= 0);
if (write(fd, &reply, 1) != 1) {
fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));
return -1;
}
return 0;
}
static int poll_func(struct pollfd *ufds, unsigned int nfds, int timeout, void *userdata) {
sw_discovery self = userdata;
int ret;
assert(self);
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
ret = poll(ufds, nfds, timeout);
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
return ret;
}
static void * thread_func(void *data) {
sw_discovery self = data;
sigset_t mask;
sigfillset(&mask);
pthread_sigmask(SIG_BLOCK, &mask, NULL);
self->thread = pthread_self();
self->thread_running = 1;
for (;;) {
char command;
if ((command = read_command(self->thread_fd)) < 0)
break;
/* fprintf(stderr, "Command: %c\n", command); */
switch (command) {
case COMMAND_POLL: {
int ret;
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
for (;;) {
errno = 0;
if ((ret = avahi_simple_poll_run(self->simple_poll)) < 0) {
if (errno == EINTR)
continue;
fprintf(stderr, __FILE__": avahi_simple_poll_run() failed: %s\n", strerror(errno));
}
break;
}
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
if (write_command(self->thread_fd, ret < 0 ? COMMAND_POLL_FAILED : COMMAND_POLL_DONE) < 0)
break;
break;
}
case COMMAND_QUIT:
return NULL;
}
}
return NULL;
}
static int oid_alloc(sw_discovery self, oid_type type) {
sw_discovery_oid i;
assert(self);
for (i = 0; i < OID_MAX; i++) {
while (self->oid_index >= OID_MAX)
self->oid_index -= OID_MAX;
if (self->oid_table[self->oid_index].type == OID_UNUSED) {
self->oid_table[self->oid_index].type = type;
self->oid_table[self->oid_index].discovery = self;
assert(OID_GET_INDEX(&self->oid_table[self->oid_index]) == self->oid_index);
return self->oid_index ++;
}
self->oid_index ++;
}
/* No free entry found */
return (sw_discovery_oid) -1;
}
static void oid_release(sw_discovery self, sw_discovery_oid oid) {
assert(self);
assert(oid < OID_MAX);
assert(self->oid_table[oid].type != OID_UNUSED);
self->oid_table[oid].type = OID_UNUSED;
self->oid_table[oid].discovery = NULL;
self->oid_table[oid].reply = NULL;
self->oid_table[oid].object = NULL;
self->oid_table[oid].extra = NULL;
self->oid_table[oid].service_data = NULL;
}
static oid_data* oid_get(sw_discovery self, sw_discovery_oid oid) {
assert(self);
if (oid >= OID_MAX)
return NULL;
if (self->oid_table[oid].type == OID_UNUSED)
return NULL;
return &self->oid_table[oid];
}
static service_data* service_data_new(sw_discovery self) {
service_data *sdata;
assert(self);
if (!(sdata = avahi_new0(service_data, 1)))
return NULL;
AVAHI_LLIST_PREPEND(service_data, services, self->services, sdata);
return sdata;
}
static void service_data_free(sw_discovery self, service_data* sdata) {
assert(self);
assert(sdata);
AVAHI_LLIST_REMOVE(service_data, services, self->services, sdata);
avahi_free(sdata->name);
avahi_free(sdata->regtype);
avahi_free(sdata->domain);
avahi_free(sdata->host);
avahi_string_list_free(sdata->txt);
avahi_free(sdata);
}
static void reg_client_callback(oid_data *data, AvahiClientState state);
static void client_callback(AvahiClient *s, AvahiClientState state, void* userdata) {
sw_discovery self = userdata;
sw_discovery_oid oid;
assert(s);
assert(self);
discovery_ref(self);
for (oid = 0; oid < OID_MAX; oid++) {
switch (self->oid_table[oid].type) {
case OID_ENTRY_GROUP:
reg_client_callback(&self->oid_table[oid], state);
break;
case OID_DOMAIN_BROWSER:
case OID_SERVICE_BROWSER:
((sw_discovery_browse_reply) self->oid_table[oid].reply)(self, oid, SW_DISCOVERY_BROWSE_INVALID, 0, NULL, NULL, NULL, self->oid_table[oid].extra);
break;
case OID_SERVICE_RESOLVER:
case OID_UNUSED:
;
}
}
discovery_unref(self);
}
sw_result sw_discovery_init(sw_discovery * self) {
int fd[2] = { -1, -1};
sw_result result = SW_E_UNKNOWN;
pthread_mutexattr_t mutex_attr;
int error;
assert(self);
AVAHI_WARN_LINKAGE;
*self = NULL;
if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0)
goto fail;
if (!(*self = avahi_new(struct _sw_discovery, 1))) {
result = SW_E_MEM;
goto fail;
}
(*self)->n_ref = 1;
(*self)->thread_fd = fd[0];
(*self)->main_fd = fd[1];
(*self)->client = NULL;
(*self)->simple_poll = NULL;
memset((*self)->oid_table, 0, sizeof((*self)->oid_table));
(*self)->oid_index = 0;
(*self)->thread_running = 0;
AVAHI_LLIST_HEAD_INIT(service_info, (*self)->services);
ASSERT_SUCCESS(pthread_mutexattr_init(&mutex_attr));
pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
ASSERT_SUCCESS(pthread_mutex_init(&(*self)->mutex, &mutex_attr));
ASSERT_SUCCESS(pthread_mutex_init(&(*self)->salt_mutex, &mutex_attr));
if (!((*self)->simple_poll = avahi_simple_poll_new()))
goto fail;
avahi_simple_poll_set_func((*self)->simple_poll, poll_func, *self);
if (!((*self)->client = avahi_client_new(avahi_simple_poll_get((*self)->simple_poll), 0, client_callback, *self, &error))) {
result = map_error(error);
goto fail;
}
/* Start simple poll */
if (avahi_simple_poll_prepare((*self)->simple_poll, -1) < 0)
goto fail;
/* Queue an initial POLL command for the thread */
if (write_command((*self)->main_fd, COMMAND_POLL) < 0)
goto fail;
if (pthread_create(&(*self)->thread, NULL, thread_func, *self) != 0)
goto fail;
(*self)->thread_running = 1;
return SW_OKAY;
fail:
if (*self)
sw_discovery_fina(*self);
return result;
}
static int stop_thread(sw_discovery self) {
assert(self);
if (!self->thread_running)
return 0;
if (write_command(self->main_fd, COMMAND_QUIT) < 0)
return -1;
avahi_simple_poll_wakeup(self->simple_poll);
ASSERT_SUCCESS(pthread_join(self->thread, NULL));
self->thread_running = 0;
return 0;
}
static sw_discovery discovery_ref(sw_discovery self) {
assert(self);
assert(self->n_ref >= 1);
self->n_ref++;
return self;
}
static void discovery_unref(sw_discovery self) {
assert(self);
assert(self->n_ref >= 1);
if (--self->n_ref > 0)
return;
stop_thread(self);
if (self->client)
avahi_client_free(self->client);
if (self->simple_poll)
avahi_simple_poll_free(self->simple_poll);
if (self->thread_fd >= 0)
close(self->thread_fd);
if (self->main_fd >= 0)
close(self->main_fd);
ASSERT_SUCCESS(pthread_mutex_destroy(&self->mutex));
ASSERT_SUCCESS(pthread_mutex_destroy(&self->salt_mutex));
while (self->services)
service_data_free(self, self->services);
avahi_free(self);
}
sw_result sw_discovery_fina(sw_discovery self) {
assert(self);
AVAHI_WARN_LINKAGE;
stop_thread(self);
discovery_unref(self);
return SW_OKAY;
}
sw_result sw_discovery_run(sw_discovery self) {
assert(self);
AVAHI_WARN_LINKAGE;
return sw_salt_run((sw_salt) self);
}
sw_result sw_discovery_stop_run(sw_discovery self) {
assert(self);
AVAHI_WARN_LINKAGE;
return sw_salt_stop_run((sw_salt) self);
}
int sw_discovery_socket(sw_discovery self) {
assert(self);
AVAHI_WARN_LINKAGE;
return self->main_fd;
}
sw_result sw_discovery_read_socket(sw_discovery self) {
sw_result result = SW_E_UNKNOWN;
assert(self);
discovery_ref(self);
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
/* Cleanup notification socket */
if (read_command(self->main_fd) != COMMAND_POLL_DONE)
goto finish;
if (avahi_simple_poll_dispatch(self->simple_poll) < 0)
goto finish;
if (self->n_ref > 1) /* Perhaps we should die */
/* Dispatch events */
if (avahi_simple_poll_prepare(self->simple_poll, -1) < 0)
goto finish;
if (self->n_ref > 1)
/* Request the poll */
if (write_command(self->main_fd, COMMAND_POLL) < 0)
goto finish;
result = SW_OKAY;
finish:
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
discovery_unref(self);
return result;
}
sw_result sw_discovery_salt(sw_discovery self, sw_salt *salt) {
assert(self);
assert(salt);
AVAHI_WARN_LINKAGE;
*salt = (sw_salt) self;
return SW_OKAY;
}
sw_result sw_salt_step(sw_salt self, sw_uint32 * msec) {
struct pollfd p;
int r;
sw_result result;
AVAHI_WARN_LINKAGE;
if (!((sw_discovery) self)->thread_running)
return SW_E_UNKNOWN;
memset(&p, 0, sizeof(p));
p.fd = ((sw_discovery) self)->main_fd;
p.events = POLLIN;
if ((r = poll(&p, 1, msec ? (int) *msec : -1)) < 0) {
/* Don't treat EINTR as error */
if (errno == EINTR)
return SW_OKAY;
return SW_E_UNKNOWN;
} else if (r == 0) {
/* Timeoout */
return SW_OKAY;
} else {
/* Success */
if (p.revents != POLLIN)
return SW_E_UNKNOWN;
if ((result = sw_discovery_read_socket((sw_discovery) self)) != SW_OKAY)
return result;
}
return SW_OKAY;
}
sw_result sw_salt_run(sw_salt self) {
sw_result ret;
AVAHI_WARN_LINKAGE;
assert(self);
for (;;)
if ((ret = sw_salt_step(self, NULL)) != SW_OKAY)
return ret;
}
sw_result sw_salt_stop_run(sw_salt self) {
AVAHI_WARN_LINKAGE;
assert(self);
if (stop_thread((sw_discovery) self) < 0)
return SW_E_UNKNOWN;
return SW_OKAY;
}
sw_result sw_salt_lock(sw_salt self) {
AVAHI_WARN_LINKAGE;
assert(self);
ASSERT_SUCCESS(pthread_mutex_lock(&((sw_discovery) self)->salt_mutex));
return SW_OKAY;
}
sw_result sw_salt_unlock(sw_salt self) {
assert(self);
AVAHI_WARN_LINKAGE;
ASSERT_SUCCESS(pthread_mutex_unlock(&((sw_discovery) self)->salt_mutex));
return SW_OKAY;
}
static void reg_report_status(oid_data *data, sw_discovery_publish_status status) {
sw_discovery_publish_reply reply;
assert(data);
reply = (sw_discovery_publish_reply) data->reply;
reply(data->discovery,
OID_GET_INDEX(data),
status,
data->extra);
}
static int reg_create_service(oid_data *data) {
int ret;
const char *real_type;
assert(data);
real_type = avahi_get_type_from_subtype(data->service_data->regtype);
if ((ret = avahi_entry_group_add_service_strlst(
data->object,
data->service_data->interface,
AVAHI_PROTO_INET,
0,
data->service_data->name,
real_type ? real_type : data->service_data->regtype,
data->service_data->domain,
data->service_data->host,
data->service_data->port,
data->service_data->txt)) < 0)
return ret;
if (real_type) {
/* Create a subtype entry */
if (avahi_entry_group_add_service_subtype(
data->object,
data->service_data->interface,
AVAHI_PROTO_INET,
0,
data->service_data->name,
real_type,
data->service_data->domain,
data->service_data->regtype) < 0)
return ret;
}
if ((ret = avahi_entry_group_commit(data->object)) < 0)
return ret;
return 0;
}
static void reg_client_callback(oid_data *data, AvahiClientState state) {
assert(data);
/* We've not been setup completely */
if (!data->object)
return;
switch (state) {
case AVAHI_CLIENT_FAILURE:
reg_report_status(data, SW_DISCOVERY_PUBLISH_INVALID);
break;
case AVAHI_CLIENT_S_RUNNING: {
int ret;
/* Register the service */
if ((ret = reg_create_service(data)) < 0) {
reg_report_status(data, SW_DISCOVERY_PUBLISH_INVALID);
return;
}
break;
}
case AVAHI_CLIENT_S_COLLISION:
case AVAHI_CLIENT_S_REGISTERING:
/* Remove our entry */
avahi_entry_group_reset(data->object);
break;
case AVAHI_CLIENT_CONNECTING:
/* Ignore */
break;
}
}
static void reg_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
oid_data *data = userdata;
assert(g);
assert(data);
switch (state) {
case AVAHI_ENTRY_GROUP_ESTABLISHED:
reg_report_status(data, SW_DISCOVERY_PUBLISH_STARTED);
break;
case AVAHI_ENTRY_GROUP_COLLISION:
reg_report_status(data, SW_DISCOVERY_PUBLISH_NAME_COLLISION);
break;
case AVAHI_ENTRY_GROUP_REGISTERING:
case AVAHI_ENTRY_GROUP_UNCOMMITED:
/* Ignore */
break;
case AVAHI_ENTRY_GROUP_FAILURE:
reg_report_status(data, SW_DISCOVERY_PUBLISH_INVALID);
break;
}
}
sw_result sw_discovery_publish(
sw_discovery self,
sw_uint32 interface_index,
sw_const_string name,
sw_const_string type,
sw_const_string domain,
sw_const_string host,
sw_port port,
sw_octets text_record,
sw_uint32 text_record_len,
sw_discovery_publish_reply reply,
sw_opaque extra,
sw_discovery_oid * oid) {
oid_data *data;
sw_result result = SW_E_UNKNOWN;
service_data *sdata;
AvahiStringList *txt = NULL;
assert(self);
assert(name);
assert(type);
assert(reply);
assert(oid);
AVAHI_WARN_LINKAGE;
if (text_record && text_record_len > 0)
if (avahi_string_list_parse(text_record, text_record_len, &txt) < 0)
return SW_E_UNKNOWN;
if ((*oid = oid_alloc(self, OID_ENTRY_GROUP)) == (sw_discovery_oid) -1) {
avahi_string_list_free(txt);
return SW_E_UNKNOWN;
}
if (!(sdata = service_data_new(self))) {
avahi_string_list_free(txt);
oid_release(self, *oid);
return SW_E_MEM;
}
data = oid_get(self, *oid);
assert(data);
data->reply = (sw_result (*)(void)) reply;
data->extra = extra;
data->service_data = sdata;
sdata->interface = interface_index == 0 ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface_index;
sdata->name = avahi_strdup(name);
sdata->regtype = type ? avahi_normalize_name_strdup(type) : NULL;
sdata->domain = domain ? avahi_normalize_name_strdup(domain) : NULL;
sdata->host = host ? avahi_normalize_name_strdup(host) : NULL;
sdata->port = port;
sdata->txt = txt;
/* Some OOM checking would be cool here */
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
if (!(data->object = avahi_entry_group_new(self->client, reg_entry_group_callback, data))) {
result = map_error(avahi_client_errno(self->client));
goto finish;
}
if (avahi_client_get_state(self->client) == AVAHI_CLIENT_S_RUNNING) {
int error;
if ((error = reg_create_service(data)) < 0) {
result = map_error(error);
goto finish;
}
}
result = SW_OKAY;
finish:
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
if (result != SW_OKAY)
if (*oid != (sw_discovery_oid) -1)
sw_discovery_cancel(self, *oid);
return result;
}
static void domain_browser_callback(
AvahiDomainBrowser *b,
AvahiIfIndex interface,
AVAHI_GCC_UNUSED AvahiProtocol protocol,
AvahiBrowserEvent event,
const char *domain,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void *userdata) {
oid_data* data = userdata;
sw_discovery_browse_reply reply;
static char domain_fixed[AVAHI_DOMAIN_NAME_MAX];
assert(b);
assert(data);
reply = (sw_discovery_browse_reply) data->reply;
domain = add_trailing_dot(domain, domain_fixed, sizeof(domain_fixed));
switch (event) {
case AVAHI_BROWSER_NEW:
reply(data->discovery, OID_GET_INDEX(data), SW_DISCOVERY_BROWSE_ADD_DOMAIN, interface, NULL, NULL, domain, data->extra);
break;
case AVAHI_BROWSER_REMOVE:
reply(data->discovery, OID_GET_INDEX(data), SW_DISCOVERY_BROWSE_REMOVE_DOMAIN, interface, NULL, NULL, domain, data->extra);
break;
case AVAHI_BROWSER_FAILURE:
reply(data->discovery, OID_GET_INDEX(data), SW_DISCOVERY_BROWSE_INVALID, interface, NULL, NULL, domain, data->extra);
break;
case AVAHI_BROWSER_CACHE_EXHAUSTED:
case AVAHI_BROWSER_ALL_FOR_NOW:
break;
}
}
sw_result sw_discovery_browse_domains(
sw_discovery self,
sw_uint32 interface_index,
sw_discovery_browse_reply reply,
sw_opaque extra,
sw_discovery_oid * oid) {
oid_data *data;
AvahiIfIndex ifindex;
sw_result result = SW_E_UNKNOWN;
assert(self);
assert(reply);
assert(oid);
AVAHI_WARN_LINKAGE;
if ((*oid = oid_alloc(self, OID_DOMAIN_BROWSER)) == (sw_discovery_oid) -1)
return SW_E_UNKNOWN;
data = oid_get(self, *oid);
assert(data);
data->reply = (sw_result (*)(void)) reply;
data->extra = extra;
ifindex = interface_index == 0 ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface_index;
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
if (!(data->object = avahi_domain_browser_new(self->client, ifindex, AVAHI_PROTO_INET, NULL, AVAHI_DOMAIN_BROWSER_BROWSE, 0, domain_browser_callback, data))) {
result = map_error(avahi_client_errno(self->client));
goto finish;
}
result = SW_OKAY;
finish:
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
if (result != SW_OKAY)
if (*oid != (sw_discovery_oid) -1)
sw_discovery_cancel(self, *oid);
return result;
}
static void service_resolver_callback(
AvahiServiceResolver *r,
AvahiIfIndex interface,
AVAHI_GCC_UNUSED AvahiProtocol protocol,
AvahiResolverEvent event,
const char *name,
const char *type,
const char *domain,
const char *host_name,
const AvahiAddress *a,
uint16_t port,
AvahiStringList *txt,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void *userdata) {
oid_data* data = userdata;
sw_discovery_resolve_reply reply;
assert(r);
assert(data);
reply = (sw_discovery_resolve_reply) data->reply;
switch (event) {
case AVAHI_RESOLVER_FOUND: {
char host_name_fixed[AVAHI_DOMAIN_NAME_MAX];
uint8_t *p = NULL;
size_t l = 0;
sw_ipv4_address addr;
sw_ipv4_address_init_from_saddr(&addr, a->data.ipv4.address);
host_name = add_trailing_dot(host_name, host_name_fixed, sizeof(host_name_fixed));
if ((p = avahi_new0(uint8_t, (l = avahi_string_list_serialize(txt, NULL, 0))+1)))
avahi_string_list_serialize(txt, p, l);
reply(data->discovery, OID_GET_INDEX(data), interface, name, type, domain, addr, port, p, l, data->extra);
avahi_free(p);
break;
}
case AVAHI_RESOLVER_FAILURE:
/* Apparently there is no way in HOWL to inform about failed resolvings ... */
avahi_warn("A service failed to resolve in the HOWL compatiblity layer of Avahi which is used by '%s'. "
"Since the HOWL API doesn't offer any means to inform the application about this, we have to ignore the failure. "
"Please fix your application to use the native API of Avahi!",
avahi_exe_name());
break;
}
}
sw_result sw_discovery_resolve(
sw_discovery self,
sw_uint32 interface_index,
sw_const_string name,
sw_const_string type,
sw_const_string domain,
sw_discovery_resolve_reply reply,
sw_opaque extra,
sw_discovery_oid * oid) {
oid_data *data;
AvahiIfIndex ifindex;
sw_result result = SW_E_UNKNOWN;
assert(self);
assert(name);
assert(type);
assert(reply);
assert(oid);
AVAHI_WARN_LINKAGE;
if ((*oid = oid_alloc(self, OID_SERVICE_RESOLVER)) == (sw_discovery_oid) -1)
return SW_E_UNKNOWN;
data = oid_get(self, *oid);
assert(data);
data->reply = (sw_result (*)(void)) reply;
data->extra = extra;
ifindex = interface_index == 0 ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface_index;
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
if (!(data->object = avahi_service_resolver_new(self->client, ifindex, AVAHI_PROTO_INET, name, type, domain, AVAHI_PROTO_INET, 0, service_resolver_callback, data))) {
result = map_error(avahi_client_errno(self->client));
goto finish;
}
result = SW_OKAY;
finish:
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
if (result != SW_OKAY)
if (*oid != (sw_discovery_oid) -1)
sw_discovery_cancel(self, *oid);
return result;
}
static void service_browser_callback(
AvahiServiceBrowser *b,
AvahiIfIndex interface,
AVAHI_GCC_UNUSED AvahiProtocol protocol,
AvahiBrowserEvent event,
const char *name,
const char *type,
const char *domain,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void *userdata) {
oid_data* data = userdata;
char type_fixed[AVAHI_DOMAIN_NAME_MAX], domain_fixed[AVAHI_DOMAIN_NAME_MAX];
sw_discovery_browse_reply reply;
assert(b);
assert(data);
reply = (sw_discovery_browse_reply) data->reply;
type = add_trailing_dot(type, type_fixed, sizeof(type_fixed));
domain = add_trailing_dot(domain, domain_fixed, sizeof(domain_fixed));
switch (event) {
case AVAHI_BROWSER_NEW:
reply(data->discovery, OID_GET_INDEX(data), SW_DISCOVERY_BROWSE_ADD_SERVICE, interface, name, type, domain, data->extra);
break;
case AVAHI_BROWSER_REMOVE:
reply(data->discovery, OID_GET_INDEX(data), SW_DISCOVERY_BROWSE_REMOVE_SERVICE, interface, name, type, domain, data->extra);
break;
case AVAHI_BROWSER_FAILURE:
reply(data->discovery, OID_GET_INDEX(data), SW_DISCOVERY_BROWSE_INVALID, interface, name, type, domain, data->extra);
break;
case AVAHI_BROWSER_CACHE_EXHAUSTED:
case AVAHI_BROWSER_ALL_FOR_NOW:
break;
}
}
sw_result sw_discovery_browse(
sw_discovery self,
sw_uint32 interface_index,
sw_const_string type,
sw_const_string domain,
sw_discovery_browse_reply reply,
sw_opaque extra,
sw_discovery_oid * oid) {
oid_data *data;
AvahiIfIndex ifindex;
sw_result result = SW_E_UNKNOWN;
assert(self);
assert(type);
assert(reply);
assert(oid);
AVAHI_WARN_LINKAGE;
if ((*oid = oid_alloc(self, OID_SERVICE_BROWSER)) == (sw_discovery_oid) -1)
return SW_E_UNKNOWN;
data = oid_get(self, *oid);
assert(data);
data->reply = (sw_result (*)(void)) reply;
data->extra = extra;
ifindex = interface_index == 0 ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface_index;
ASSERT_SUCCESS(pthread_mutex_lock(&self->mutex));
if (!(data->object = avahi_service_browser_new(self->client, ifindex, AVAHI_PROTO_INET, type, domain, 0, service_browser_callback, data))) {
result = map_error(avahi_client_errno(self->client));
goto finish;
}
result = SW_OKAY;
finish:
ASSERT_SUCCESS(pthread_mutex_unlock(&self->mutex));
if (result != SW_OKAY)
if (*oid != (sw_discovery_oid) -1)
sw_discovery_cancel(self, *oid);
return result;
}
sw_result sw_discovery_cancel(sw_discovery self, sw_discovery_oid oid) {
oid_data *data;
assert(self);
AVAHI_WARN_LINKAGE;
if (!(data = oid_get(self, oid)))
return SW_E_UNKNOWN;
if (data->object) {
switch (data->type) {
case OID_SERVICE_BROWSER:
avahi_service_browser_free(data->object);
break;
case OID_SERVICE_RESOLVER:
avahi_service_resolver_free(data->object);
break;
case OID_DOMAIN_BROWSER:
avahi_domain_browser_free(data->object);
break;
case OID_ENTRY_GROUP:
avahi_entry_group_free(data->object);
break;
case OID_UNUSED:
;
}
}
if (data->service_data) {
assert(data->type == OID_ENTRY_GROUP);
service_data_free(self, data->service_data);
}
oid_release(self, oid);
return SW_OKAY;
}
sw_result sw_discovery_init_with_flags(
sw_discovery * self,
sw_discovery_init_flags flags) {
assert(self);
AVAHI_WARN_LINKAGE;
if (flags != SW_DISCOVERY_USE_SHARED_SERVICE)
return SW_E_NO_IMPL;
return sw_discovery_init(self);
}
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