static void register_stuff(struct context *ctx) {
if (!ctx->group) {
if (!(ctx->group = avahi_entry_group_new(ctx->client, publish_reply, ctx))) {
rs_log_crit("Failed to create entry group: %s", avahi_strerror(avahi_client_errno(ctx->client)));
goto fail;
}
}
if (avahi_entry_group_is_empty(ctx->group)) {
char cpus[32] = "";
char machine[64] = "cc_machine=", version[64] = "cc_version=";
char *m = NULL, *v = NULL;
if (ctx->advertise_capabilities) {
snprintf(cpus, sizeof(cpus), "cpus=%i", ctx->n_cpus);
v = dcc_get_gcc_version(version+11, sizeof(version)-11);
m = dcc_get_gcc_machine(machine+11, sizeof(machine)-11);
}
/* Register our service */
if (avahi_entry_group_add_service(
ctx->group,
AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC,
0,
ctx->name,
ctx->service_type,
NULL,
NULL,
ctx->port,
!ctx->advertise_capabilities ? NULL : "txtvers=1",
cpus,
"distcc="PACKAGE_VERSION,
"gnuhost="GNU_HOST,
v ? version : NULL,
m ? machine : NULL,
NULL) < 0) {
rs_log_crit("Failed to add service: %s", avahi_strerror(avahi_client_errno(ctx->client)));
goto fail;
}
if (ctx->advertise_capabilities) {
if (v && m) {
char stype[128];
dcc_make_dnssd_subtype(stype, sizeof(stype), v, m);
if (avahi_entry_group_add_service_subtype(
ctx->group,
AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC,
0,
ctx->name,
ctx->service_type,
NULL,
stype) < 0) {
rs_log_crit("Failed to add service: %s", avahi_strerror(avahi_client_errno(ctx->client)));
goto fail;
}
} else
rs_log_warning("Failed to determine CC version, not registering DNS-SD service subtype!");
}
if (avahi_entry_group_commit(ctx->group) < 0) {
rs_log_crit("Failed to commit entry group: %s", avahi_strerror(avahi_client_errno(ctx->client)));
goto fail;
}
}
return;
fail:
avahi_threaded_poll_quit(ctx->threaded_poll);
}
/* The main function of the background daemon */
static int daemon_proc(const char *host_file, const char *lock_file, int n_slots) {
int ret = 1;
int lock_fd = -1;
struct daemon_data d;
time_t clip_time;
int error;
char machine[64], version[64], stype[128];
rs_add_logger(rs_logger_syslog, RS_LOG_DEBUG, NULL, 0);
/* Prepare daemon data structure */
d.fd = -1;
d.hosts = NULL;
d.n_slots = n_slots;
d.simple_poll = NULL;
d.browser = NULL;
d.client = NULL;
clip_time = time(NULL);
rs_log_info("Zeroconf daemon running.\n");
/* Open daemon lock file and lock it */
if ((lock_fd = open(lock_file, O_RDWR|O_CREAT, 0666)) < 0) {
rs_log_crit("open('%s') failed: %s\n", lock_file, strerror(errno));
goto finish;
}
if (generic_lock(lock_fd, 1, 1, 0) < 0) {
/* lock failed, there's probably already another daemon running */
goto finish;
}
/* Open host file */
if ((d.fd = open(host_file, O_RDWR|O_CREAT, 0666)) < 0) {
rs_log_crit("open('%s') failed: %s\n", host_file, strerror(errno));
goto finish;
}
/* Clear host file */
write_hosts(&d);
if (!(d.simple_poll = avahi_simple_poll_new())) {
rs_log_crit("Failed to create simple poll object.\n");
goto finish;
}
if (!(d.client = avahi_client_new(
avahi_simple_poll_get(d.simple_poll),
0,
client_callback,
&d,
&error))) {
rs_log_crit("Failed to create Avahi client object: %s\n", avahi_strerror(error));
goto finish;
}
if (dcc_get_gcc_version(version, sizeof(version)) &&
dcc_get_gcc_machine(machine, sizeof(machine))) {
dcc_make_dnssd_subtype(stype, sizeof(stype), version, machine);
} else {
rs_log_warning("Warning, failed to get CC version and machine type.\n");
strncpy(stype, DCC_DNS_SERVICE_TYPE, sizeof(stype));
stype[sizeof(stype)-1] = 0;
}
rs_log_info("Browsing for '%s'.\n", stype);
if (!(d.browser = avahi_service_browser_new(
d.client,
AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC,
stype,
NULL,
0,
browse_reply,
&d))) {
rs_log_crit("Failed to create service browser object: %s\n", avahi_strerror(avahi_client_errno(d.client)));
goto finish;
}
/* Check whether the host file has been used recently */
while (fd_last_used(d.fd, clip_time) <= MAX_IDLE_TIME) {
/* Iterate the main loop for 5s */
if (avahi_simple_poll_iterate(d.simple_poll, 5000) != 0) {
rs_log_crit("Event loop exited abnormaly.\n");
goto finish;
}
}
/* Wer are idle */
rs_log_info("Zeroconf daemon unused.\n");
ret = 0;
finish:
/* Cleanup */
if (lock_fd >= 0) {
generic_lock(lock_fd, 1, 0, 0);
close(lock_fd);
}
if (d.fd >= 0)
close(d.fd);
while (d.hosts) {
struct host *h = d.hosts;
d.hosts = d.hosts->next;
free_host(h);
}
if (d.client)
avahi_client_free(d.client);
if (d.simple_poll)
avahi_simple_poll_free(d.simple_poll);
rs_log_info("zeroconf daemon ended.\n");
return ret;
}