New upstream version 1.5.0+dfsgupstream/1.5.0+dfsg

1 files changed, 264 insertions, 0 deletions

diff --git a/src/registry_person.c b/src/registry_person.c
new file mode 100644
index 000000000..5f9099c9a
--- /dev/null
+++ b/src/registry_person.c
@@ -0,0 +1,264 @@
+#include "registry_internals.h"
+
+// ----------------------------------------------------------------------------
+// PERSON_URL INDEX
+
+int person_url_compare(void *a, void *b) {
+    register uint32_t hash1 = ((REGISTRY_PERSON_URL *)a)->url->hash;
+    register uint32_t hash2 = ((REGISTRY_PERSON_URL *)b)->url->hash;
+
+    if(hash1 < hash2) return -1;
+    else if(hash1 > hash2) return 1;
+    else return strcmp(((REGISTRY_PERSON_URL *)a)->url->url, ((REGISTRY_PERSON_URL *)b)->url->url);
+}
+
+inline REGISTRY_PERSON_URL *registry_person_url_index_find(REGISTRY_PERSON *p, const char *url) {
+    debug(D_REGISTRY, "Registry: registry_person_url_index_find('%s', '%s')", p->guid, url);
+
+    char buf[sizeof(REGISTRY_URL) + strlen(url)];
+
+    REGISTRY_URL *u = (REGISTRY_URL *)&buf;
+    strcpy(u->url, url);
+    u->hash = simple_hash(u->url);
+
+    REGISTRY_PERSON_URL tpu = { .url = u };
+
+    REGISTRY_PERSON_URL *pu = (REGISTRY_PERSON_URL *)avl_search(&p->person_urls, (void *)&tpu);
+    return pu;
+}
+
+inline REGISTRY_PERSON_URL *registry_person_url_index_add(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
+    debug(D_REGISTRY, "Registry: registry_person_url_index_add('%s', '%s')", p->guid, pu->url->url);
+    REGISTRY_PERSON_URL *tpu = (REGISTRY_PERSON_URL *)avl_insert(&(p->person_urls), (avl *)(pu));
+    if(tpu != pu)
+        error("Registry: registry_person_url_index_add('%s', '%s') already exists as '%s'", p->guid, pu->url->url, tpu->url->url);
+
+    return tpu;
+}
+
+inline REGISTRY_PERSON_URL *registry_person_url_index_del(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
+    debug(D_REGISTRY, "Registry: registry_person_url_index_del('%s', '%s')", p->guid, pu->url->url);
+    REGISTRY_PERSON_URL *tpu = (REGISTRY_PERSON_URL *)avl_remove(&(p->person_urls), (avl *)(pu));
+    if(!tpu)
+        error("Registry: registry_person_url_index_del('%s', '%s') deleted nothing", p->guid, pu->url->url);
+    else if(tpu != pu)
+        error("Registry: registry_person_url_index_del('%s', '%s') deleted wrong URL '%s'", p->guid, pu->url->url, tpu->url->url);
+
+    return tpu;
+}
+
+// ----------------------------------------------------------------------------
+// PERSON_URL
+
+REGISTRY_PERSON_URL *registry_person_url_allocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when) {
+    debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url, sizeof(REGISTRY_PERSON_URL) + namelen);
+
+    // protection from too big names
+    if(namelen > registry.max_name_length)
+        namelen = registry.max_name_length;
+
+    REGISTRY_PERSON_URL *pu = mallocz(sizeof(REGISTRY_PERSON_URL) + namelen);
+
+    // a simple strcpy() should do the job
+    // but I prefer to be safe, since the caller specified urllen
+    strncpyz(pu->machine_name, name, namelen);
+
+    pu->machine = m;
+    pu->first_t = pu->last_t = (uint32_t)when;
+    pu->usages = 1;
+    pu->url = u;
+    pu->flags = REGISTRY_URL_FLAGS_DEFAULT;
+    m->links++;
+
+    registry.persons_urls_memory += sizeof(REGISTRY_PERSON_URL) + namelen;
+
+    debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): indexing URL in person", p->guid, m->guid, u->url);
+    REGISTRY_PERSON_URL *tpu = registry_person_url_index_add(p, pu);
+    if(tpu != pu) {
+        error("Registry: Attempted to add duplicate person url '%s' with name '%s' to person '%s'", u->url, name, p->guid);
+        free(pu);
+        pu = tpu;
+    }
+    else
+        registry_url_link(u);
+
+    return pu;
+}
+
+void registry_person_url_free(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
+    debug(D_REGISTRY, "registry_person_url_free('%s', '%s')", p->guid, pu->url->url);
+
+    REGISTRY_PERSON_URL *tpu = registry_person_url_index_del(p, pu);
+    if(tpu) {
+        registry_url_unlink(tpu->url);
+        tpu->machine->links--;
+        registry.persons_urls_memory -= sizeof(REGISTRY_PERSON_URL) + strlen(tpu->machine_name);
+        freez(tpu);
+    }
+}
+
+// this function is needed to change the name of a PERSON_URL
+REGISTRY_PERSON_URL *registry_person_url_reallocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when, REGISTRY_PERSON_URL *pu) {
+    debug(D_REGISTRY, "registry_person_url_reallocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url, sizeof(REGISTRY_PERSON_URL) + namelen);
+
+    // keep a backup
+    REGISTRY_PERSON_URL pu2 = {
+            .first_t = pu->first_t,
+            .last_t = pu->last_t,
+            .usages = pu->usages,
+            .flags = pu->flags,
+            .machine = pu->machine,
+            .machine_name = ""
+    };
+
+    // remove the existing one from the index
+    registry_person_url_free(p, pu);
+    pu = &pu2;
+
+    // allocate a new one
+    REGISTRY_PERSON_URL *tpu = registry_person_url_allocate(p, m, u, name, namelen, when);
+    tpu->first_t = pu->first_t;
+    tpu->last_t = pu->last_t;
+    tpu->usages = pu->usages;
+    tpu->flags = pu->flags;
+
+    return tpu;
+}
+
+
+// ----------------------------------------------------------------------------
+// PERSON
+
+REGISTRY_PERSON *registry_person_find(const char *person_guid) {
+    debug(D_REGISTRY, "Registry: registry_person_find('%s')", person_guid);
+    return dictionary_get(registry.persons, person_guid);
+}
+
+REGISTRY_PERSON *registry_person_allocate(const char *person_guid, time_t when) {
+    debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): allocating new person, sizeof(PERSON)=%zu", (person_guid)?person_guid:"", sizeof(REGISTRY_PERSON));
+
+    REGISTRY_PERSON *p = mallocz(sizeof(REGISTRY_PERSON));
+    if(!person_guid) {
+        for(;;) {
+            uuid_t uuid;
+            uuid_generate(uuid);
+            uuid_unparse_lower(uuid, p->guid);
+
+            debug(D_REGISTRY, "Registry: Checking if the generated person guid '%s' is unique", p->guid);
+            if (!dictionary_get(registry.persons, p->guid)) {
+                debug(D_REGISTRY, "Registry: generated person guid '%s' is unique", p->guid);
+                break;
+            }
+            else
+                info("Registry: generated person guid '%s' found in the registry. Retrying...", p->guid);
+        }
+    }
+    else
+        strncpyz(p->guid, person_guid, GUID_LEN);
+
+    debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): creating dictionary of urls", p->guid);
+    avl_init(&p->person_urls, person_url_compare);
+
+    p->first_t = p->last_t = (uint32_t)when;
+    p->usages = 0;
+
+    registry.persons_memory += sizeof(REGISTRY_PERSON);
+
+    registry.persons_count++;
+    dictionary_set(registry.persons, p->guid, p, sizeof(REGISTRY_PERSON));
+
+    return p;
+}
+
+
+// 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(registry_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;
+}
+
+void registry_person_del(REGISTRY_PERSON *p) {
+    debug(D_REGISTRY, "Registry: registry_person_del('%s'): creating dictionary of urls", p->guid);
+
+    while(p->person_urls.root)
+        registry_person_unlink_from_url(p, (REGISTRY_PERSON_URL *)p->person_urls.root);
+
+    debug(D_REGISTRY, "Registry: deleting person '%s' from persons registry", p->guid);
+    dictionary_del(registry.persons, p->guid);
+
+    debug(D_REGISTRY, "Registry: freeing person '%s'", p->guid);
+    freez(p);
+}
+
+// ----------------------------------------------------------------------------
+// LINKING OF OBJECTS
+
+REGISTRY_PERSON_URL *registry_person_link_to_url(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when) {
+    debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): searching for URL in person", p->guid, m->guid, u->url);
+
+    REGISTRY_PERSON_URL *pu = registry_person_url_index_find(p, u->url);
+    if(!pu) {
+        debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, u->url);
+        pu = registry_person_url_allocate(p, m, u, name, namelen, when);
+        registry.persons_urls_count++;
+    }
+    else {
+        debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, u->url);
+        pu->usages++;
+        if(likely(pu->last_t < (uint32_t)when)) pu->last_t = (uint32_t)when;
+
+        if(pu->machine != m) {
+            REGISTRY_MACHINE_URL *mu = dictionary_get(pu->machine->machine_urls, u->url);
+            if(mu) {
+                debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): URL switched machines (old was '%s') - expiring it from previous machine.",
+                     p->guid, m->guid, u->url, pu->machine->guid);
+                mu->flags |= REGISTRY_URL_FLAGS_EXPIRED;
+            }
+            else {
+                debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): URL switched machines (old was '%s') - but the URL is not linked to the old machine.",
+                     p->guid, m->guid, u->url, pu->machine->guid);
+            }
+
+            pu->machine->links--;
+            pu->machine = m;
+        }
+
+        if(strcmp(pu->machine_name, name)) {
+            // the name of the PERSON_URL has changed !
+            pu = registry_person_url_reallocate(p, m, u, name, namelen, when, pu);
+        }
+    }
+
+    p->usages++;
+    if(likely(p->last_t < (uint32_t)when)) p->last_t = (uint32_t)when;
+
+    if(pu->flags & REGISTRY_URL_FLAGS_EXPIRED) {
+        debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): accessing an expired URL. Re-enabling URL.", p->guid, m->guid, u->url);
+        pu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED;
+    }
+
+    return pu;
+}
+
+void registry_person_unlink_from_url(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
+    registry_person_url_free(p, pu);
+}