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#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#include "server.h"
#include "util.h"
flxServer *flx_server_new(GMainContext *c) {
flxServer *s = g_new(flxServer, 1);
if (c) {
g_main_context_ref(c);
s->context = c;
} else
s->context = g_main_context_default();
s->current_id = 1;
s->rrset_by_id = g_hash_table_new(g_int_hash, g_int_equal);
s->rrset_by_name = g_hash_table_new(g_str_hash, g_str_equal);
s->entries = NULL;
s->monitor = flx_interface_monitor_new(s->context);
return s;
}
void flx_server_free(flxServer* s) {
g_assert(s);
flx_interface_monitor_free(s->monitor);
flx_server_remove(s, 0);
g_hash_table_destroy(s->rrset_by_id);
g_hash_table_destroy(s->rrset_by_name);
g_main_context_unref(s->context);
g_free(s);
}
gint flx_server_get_next_id(flxServer *s) {
g_assert(s);
return s->current_id++;
}
void flx_server_add_rr(flxServer *s, gint id, gint interface, const flxRecord *rr) {
flxEntry *e;
g_assert(s);
g_assert(rr);
g_assert(rr->name);
g_assert(rr->data);
g_assert(rr->size);
e = g_new(flxEntry, 1);
flx_record_copy_normalize(&e->rr, rr);
e->id = id;
e->interface = interface;
/* Insert into linked list */
e->prev = NULL;
if ((e->next = s->entries))
e->next->prev = e;
s->entries = e;
/* Insert into hash table indexed by id */
e->prev_by_id = NULL;
if ((e->next_by_id = g_hash_table_lookup(s->rrset_by_id, &id)))
e->next_by_id->prev = e;
g_hash_table_replace(s->rrset_by_id, &e->id, e);
/* Insert into hash table indexed by name */
e->prev_by_name = NULL;
if ((e->next_by_name = g_hash_table_lookup(s->rrset_by_name, e->rr.name)))
e->next_by_name->prev = e;
g_hash_table_replace(s->rrset_by_name, e->rr.name, e);
}
void flx_server_add(flxServer *s, gint id, const gchar *name, gint interface, guint16 type, gconstpointer data, guint size) {
flxRecord rr;
g_assert(s);
g_assert(name);
g_assert(data);
g_assert(size);
rr.name = (gchar*) name;
rr.type = type;
rr.class = FLX_DNS_CLASS_IN;
rr.data = (gpointer) data;
rr.size = size;
rr.interface = interface;
rr.ttl = FLX_DEFAULT_TTL;
flx_server_add_rr(s, id, 0, &rr);
}
const flxRecord *flx_server_iterate(flxServer *s, gint id, void **state) {
flxEntry **e = (flxEntry**) state;
g_assert(s);
g_assert(e);
if (e)
*e = id > 0 ? (*e)->next_by_id : (*e)->next;
else
*e = id > 0 ? g_hash_table_lookup(s->rrset_by_id, &id) : s->entries;
if (!*e)
return NULL;
return &(*e)->rr;
}
static void free_entry(flxServer*s, flxEntry *e) {
g_assert(e);
/* Remove from linked list */
if (e->prev)
e->prev->next = e->next;
else
s->entries = e->next;
if (e->next)
e->next->prev = e->prev;
/* Remove from hash table indexed by id */
if (e->prev_by_id)
e->prev_by_id = e->next_by_id;
else {
if (e->next_by_id)
g_hash_table_replace(s->rrset_by_id, &e->next_by_id->id, e->next_by_id);
else
g_hash_table_remove(s->rrset_by_id, &e->id);
}
if (e->next_by_id)
e->next_by_id->prev_by_id = e->prev_by_id;
/* Remove from hash table indexed by name */
if (e->prev_by_name)
e->prev_by_name = e->next_by_name;
else {
if (e->next_by_name)
g_hash_table_replace(s->rrset_by_name, &e->next_by_name->rr.name, e->next_by_name);
else
g_hash_table_remove(s->rrset_by_name, &e->rr.name);
}
if (e->next_by_name)
e->next_by_name->prev_by_name = e->prev_by_name;
}
void flx_server_remove(flxServer *s, gint id) {
g_assert(s);
if (id <= 0) {
while (s->entries)
free_entry(s, s->entries);
} else {
flxEntry *e;
while ((e = g_hash_table_lookup(s->rrset_by_id, &id)))
free_entry(s, e);
}
}
flxRecord *flx_record_copy_normalize(flxRecord *ret_dest, const flxRecord*src) {
g_assert(ret_dest);
g_assert(src);
*ret_dest = *src;
ret_dest->name = flx_normalize_name(src->name);
ret_dest->data = g_memdup(src->data, src->size);
return ret_dest;
}
static const gchar *dns_class_to_string(guint16 class) {
if (class == FLX_DNS_CLASS_IN)
return "IN";
return NULL;
}
static const gchar *dns_type_to_string(guint16 type) {
switch (type) {
case FLX_DNS_TYPE_A:
return "A";
case FLX_DNS_TYPE_AAAA:
return "AAAA";
case FLX_DNS_TYPE_PTR:
return "PTR";
case FLX_DNS_TYPE_HINFO:
return "HINFO";
case FLX_DNS_TYPE_TXT:
return "TXT";
default:
return NULL;
}
}
void flx_server_dump(flxServer *s, FILE *f) {
flxEntry *e;
g_assert(s);
g_assert(f);
for (e = s->entries; e; e = e->next) {
char t[256];
fprintf(f, "%-40s %-8s %-8s ", e->rr.name, dns_class_to_string(e->rr.class), dns_type_to_string(e->rr.type));
t[0] = 0;
if (e->rr.class == FLX_DNS_CLASS_IN) {
if (e->rr.type == FLX_DNS_TYPE_A)
inet_ntop(AF_INET, e->rr.data, t, sizeof(t));
else if (e->rr.type == FLX_DNS_TYPE_AAAA)
inet_ntop(AF_INET6, e->rr.data, t, sizeof(t));
else if (e->rr.type == FLX_DNS_TYPE_PTR)
g_strlcpy(t, e->rr.data, sizeof(t));
else if (e->rr.type == FLX_DNS_TYPE_HINFO) {
char *s2;
if ((s2 = memchr(e->rr.data, 0, e->rr.size))) {
s2++;
if (memchr(s2, 0, e->rr.size - ((char*) s2 - (char*) e->rr.data)))
snprintf(t, sizeof(t), "'%s' '%s'", (char*) e->rr.data, s2);
}
}
}
fprintf(f, "%s\n", t);
}
}
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