// verify the person, the machine and the URL exist in our DB
REGISTRY_PERSON_URL *registry_verify_request(char *person_guid, char *machine_guid, char *url, REGISTRY_PERSON **pp, REGISTRY_MACHINE **mm) {
char pbuf[GUID_LEN + 1], mbuf[GUID_LEN + 1];
if(!person_guid || !*person_guid || !machine_guid || !*machine_guid || !url || !*url) {
info("Registry Request Verification: invalid request! person: '%s', machine '%s', url '%s'", person_guid?person_guid:"UNSET", machine_guid?machine_guid:"UNSET", url?url:"UNSET");
return NULL;
}
// normalize the url
url = registry_fix_url(url, NULL);
// make sure the person GUID is valid
if(regenerate_guid(person_guid, pbuf) == -1) {
info("Registry Request Verification: invalid person GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
return NULL;
}
person_guid = pbuf;
// make sure the machine GUID is valid
if(regenerate_guid(machine_guid, mbuf) == -1) {
info("Registry Request Verification: invalid machine GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
return NULL;
}
machine_guid = mbuf;
// make sure the machine exists
REGISTRY_MACHINE *m = registry_machine_find(machine_guid);
if(!m) {
info("Registry Request Verification: machine not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
return NULL;
}
if(mm) *mm = m;
// make sure the person exist
REGISTRY_PERSON *p = registry_person_find(person_guid);
if(!p) {
info("Registry Request Verification: person not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
return NULL;
}
if(pp) *pp = p;
REGISTRY_PERSON_URL *pu = registry_person_url_index_find(p, url);
if(!pu) {
info("Registry Request Verification: URL not found for person, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
return NULL;
}
return pu;
}
char *registry_get_this_machine_guid(void) {
static char guid[GUID_LEN + 1] = "";
if(likely(guid[0]))
return guid;
// read it from disk
int fd = open(registry.machine_guid_filename, O_RDONLY);
if(fd != -1) {
char buf[GUID_LEN + 1];
if(read(fd, buf, GUID_LEN) != GUID_LEN)
error("Failed to read machine GUID from '%s'", registry.machine_guid_filename);
else {
buf[GUID_LEN] = '\0';
if(regenerate_guid(buf, guid) == -1) {
error("Failed to validate machine GUID '%s' from '%s'. Ignoring it - this might mean this netdata will appear as duplicate in the registry.",
buf, registry.machine_guid_filename);
guid[0] = '\0';
}
else if(is_machine_guid_blacklisted(guid))
guid[0] = '\0';
}
close(fd);
}
// generate a new one?
if(!guid[0]) {
uuid_t uuid;
uuid_generate_time(uuid);
uuid_unparse_lower(uuid, guid);
guid[GUID_LEN] = '\0';
// save it
fd = open(registry.machine_guid_filename, O_WRONLY|O_CREAT|O_TRUNC, 444);
if(fd == -1)
fatal("Cannot create unique machine id file '%s'. Please fix this.", registry.machine_guid_filename);
if(write(fd, guid, GUID_LEN) != GUID_LEN)
fatal("Cannot write the unique machine id file '%s'. Please fix this.", registry.machine_guid_filename);
close(fd);
}
setenv("NETDATA_REGISTRY_UNIQUE_ID", guid, 1);
return guid;
}
// 1. validate machine GUID
// 2. if it is valid, find it or create it and return it
// 3. if it is not valid, return NULL
REGISTRY_MACHINE *registry_machine_get(const char *machine_guid, time_t when) {
REGISTRY_MACHINE *m = NULL;
if(likely(machine_guid && *machine_guid)) {
// validate it is a GUID
char buf[GUID_LEN + 1];
if(unlikely(regenerate_guid(machine_guid, buf) == -1))
info("Registry: machine guid '%s' is not a valid guid. Ignoring it.", machine_guid);
else {
machine_guid = buf;
m = registry_machine_find(machine_guid);
if(!m) m = registry_machine_allocate(machine_guid, when);
}
}
return m;
}
// 1. validate person GUID
// 2. if it is valid, find it
// 3. if it is not valid, create a new one
// 4. return it
REGISTRY_PERSON *registry_person_get(const char *person_guid, time_t when) {
debug(D_REGISTRY, "Registry: registry_person_get('%s'): creating dictionary of urls", person_guid);
REGISTRY_PERSON *p = NULL;
if(person_guid && *person_guid) {
char buf[GUID_LEN + 1];
// validate it is a GUID
if(unlikely(regenerate_guid(person_guid, buf) == -1))
info("Registry: person guid '%s' is not a valid guid. Ignoring it.", person_guid);
else {
person_guid = buf;
p = registry_person_find(person_guid);
}
}
if(!p) p = registry_person_allocate(NULL, when);
return p;
}
REGISTRY_MACHINE *registry_request_machine(char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) {
(void)when;
char mbuf[GUID_LEN + 1];
REGISTRY_PERSON *p = NULL;
REGISTRY_MACHINE *m = NULL;
REGISTRY_PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m);
if(!pu || !p || !m) return NULL;
// make sure the machine GUID is valid
if(regenerate_guid(request_machine, mbuf) == -1) {
info("Registry Machine URLs request: invalid machine GUID, person: '%s', machine '%s', url '%s', request machine '%s'", p->guid, m->guid, pu->url->url, request_machine);
return NULL;
}
request_machine = mbuf;
// make sure the machine exists
m = registry_machine_find(request_machine);
if(!m) {
info("Registry Machine URLs request: machine not found, person: '%s', machine '%s', url '%s', request machine '%s'", p->guid, machine_guid, pu->url->url, request_machine);
return NULL;
}
// Verify the user has in the past accessed this machine
// We will walk through the PERSON_URLs to find the machine
// linking to our machine
// a structure to pass to the dictionary_get_all() callback handler
struct machine_request_callback_data rdata = { m, NULL };
// request a walk through on the dictionary
avl_traverse(&p->person_urls, machine_request_callback, &rdata);
if(rdata.result)
return m;
return NULL;
}
