char *avahi_get_host_name(char *ret_s, size_t size) {
assert(ret_s);
assert(size > 0);
if (gethostname(ret_s, size) >= 0) {
ret_s[size-1] = 0;
strip_bad_chars(ret_s);
} else
*ret_s = 0;
if (strcmp(ret_s, "localhost") == 0 || strncmp(ret_s, "localhost.", 10) == 0) {
*ret_s = 0;
avahi_log_warn("System host name is set to 'localhost'. This is not a suitable mDNS host name, looking for alternatives.");
}
if (*ret_s == 0) {
/* No hostname was set, so let's take the OS name */
#ifdef __linux__
/* Try LSB distribution name first */
if (load_lsb_distrib_id(ret_s, size) >= 0) {
strip_bad_chars(ret_s);
avahi_strdown(ret_s);
}
if (*ret_s == 0)
#endif
{
/* Try uname() second */
struct utsname utsname;
if (uname(&utsname) >= 0) {
snprintf(ret_s, size, "%s", utsname.sysname);
strip_bad_chars(ret_s);
avahi_strdown(ret_s);
}
/* Give up */
if (*ret_s == 0)
snprintf(ret_s, size, "unnamed");
}
}
if (size >= AVAHI_LABEL_MAX)
ret_s[AVAHI_LABEL_MAX-1] = 0;
return ret_s;
}
char* dcc_make_dnssd_subtype(char *stype, size_t nbytes, const char *v, const char *m) {
char version[64], machine[64];
strncpy(version, v, sizeof(version)-1);
version[sizeof(version)-1] = 0;
strncpy(machine, m, sizeof(machine)-1);
machine[sizeof(machine)-1] = 0;
strip_bad_chars(version);
strip_bad_chars(machine);
snprintf(stype, nbytes, "_%s--%s._sub." DCC_DNS_SERVICE_TYPE, machine, version);
stype[nbytes-1] = 0;
return stype;
}
