core wins server handling
Copyright (C) Andrew Tridgell 2005
-
+ Copyright (C) Stefan Metzmacher 2005
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
*/
uint32_t wins_server_ttl(struct wins_server *winssrv, uint32_t ttl)
{
- ttl = MIN(ttl, winssrv->max_ttl);
- ttl = MAX(ttl, winssrv->min_ttl);
+ ttl = MIN(ttl, winssrv->config.max_renew_interval);
+ ttl = MAX(ttl, winssrv->config.min_renew_interval);
return ttl;
}
+static enum wrepl_name_type wrepl_type(uint16_t nb_flags, struct nbt_name *name, BOOL mhomed)
+{
+ /* this copes with the nasty hack that is the type 0x1c name */
+ if (name->type == NBT_NAME_LOGON) {
+ return WREPL_TYPE_SGROUP;
+ }
+ if (nb_flags & NBT_NM_GROUP) {
+ return WREPL_TYPE_GROUP;
+ }
+ if (mhomed) {
+ return WREPL_TYPE_MHOMED;
+ }
+ return WREPL_TYPE_UNIQUE;
+}
+
/*
register a new name with WINS
*/
static uint8_t wins_register_new(struct nbt_name_socket *nbtsock,
struct nbt_name_packet *packet,
- const struct nbt_peer_socket *src)
+ const struct nbt_peer_socket *src,
+ enum wrepl_name_type type)
{
struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private,
struct nbtd_interface);
uint16_t nb_flags = packet->additional[0].rdata.netbios.addresses[0].nb_flags;
const char *address = packet->additional[0].rdata.netbios.addresses[0].ipaddr;
struct winsdb_record rec;
-
- rec.name = name;
- rec.nb_flags = nb_flags;
- rec.state = WINS_REC_ACTIVE;
- rec.wins_owner = WINSDB_OWNER_LOCAL;
- rec.expire_time = time(NULL) + ttl;
- rec.registered_by = src->addr;
- rec.addresses = winsdb_addr_list_make(packet);
+ enum wrepl_name_node node;
+
+#define WREPL_NODE_NBT_FLAGS(nb_flags) \
+ ((nb_flags & NBT_NM_OWNER_TYPE)>>13)
+
+ node = WREPL_NODE_NBT_FLAGS(nb_flags);
+
+ rec.name = name;
+ rec.type = type;
+ rec.state = WREPL_STATE_ACTIVE;
+ rec.node = node;
+ rec.is_static = False;
+ rec.expire_time = time(NULL) + ttl;
+ rec.version = 0; /* will allocated later */
+ rec.wins_owner = NULL; /* will be set later */
+ rec.registered_by = src->addr;
+ rec.addresses = winsdb_addr_list_make(packet);
if (rec.addresses == NULL) return NBT_RCODE_SVR;
- if (IS_GROUP_NAME(name, nb_flags)) {
- address = WINSDB_GROUP_ADDRESS;
- }
rec.addresses = winsdb_addr_list_add(rec.addresses,
address,
WINSDB_OWNER_LOCAL,
DEBUG(4,("WINS: accepted registration of %s with address %s\n",
nbt_name_string(packet, name), rec.addresses[0]->address));
- return winsdb_add(winssrv, &rec);
+ return winsdb_add(winssrv->wins_db, &rec, WINSDB_FLAG_ALLOC_VERSION | WINSDB_FLAG_TAKE_OWNERSHIP);
}
static uint8_t wins_update_ttl(struct nbt_name_socket *nbtsock,
struct nbt_name_packet *packet,
struct winsdb_record *rec,
+ struct winsdb_addr *winsdb_addr,
const struct nbt_peer_socket *src)
{
struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private,
struct wins_server *winssrv = iface->nbtsrv->winssrv;
uint32_t ttl = wins_server_ttl(winssrv, packet->additional[0].ttl);
const char *address = packet->additional[0].rdata.netbios.addresses[0].ipaddr;
- time_t now = time(NULL);
+ uint32_t modify_flags = 0;
- if (now + ttl > rec->expire_time) {
- rec->expire_time = now + ttl;
- }
+ rec->expire_time = time(NULL) + ttl;
rec->registered_by = src->addr;
+ if (winsdb_addr) {
+ winsdb_addr->wins_owner = WINSDB_OWNER_LOCAL;
+ winsdb_addr->expire_time = rec->expire_time;
+ }
+
+ if (strcmp(WINSDB_OWNER_LOCAL, rec->wins_owner) != 0) {
+ modify_flags = WINSDB_FLAG_ALLOC_VERSION | WINSDB_FLAG_TAKE_OWNERSHIP;
+ }
+
DEBUG(5,("WINS: refreshed registration of %s at %s\n",
nbt_name_string(packet, rec->name), address));
- return winsdb_modify(winssrv, rec);
+ return winsdb_modify(winssrv->wins_db, rec, modify_flags);
+}
+
+/*
+ do a sgroup merge
+*/
+static uint8_t wins_sgroup_merge(struct nbt_name_socket *nbtsock,
+ struct nbt_name_packet *packet,
+ struct winsdb_record *rec,
+ const char *address,
+ const struct nbt_peer_socket *src)
+{
+ struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private,
+ struct nbtd_interface);
+ struct wins_server *winssrv = iface->nbtsrv->winssrv;
+ uint32_t ttl = wins_server_ttl(winssrv, packet->additional[0].ttl);
+
+ rec->expire_time = time(NULL) + ttl;
+ rec->registered_by = src->addr;
+
+ rec->addresses = winsdb_addr_list_add(rec->addresses,
+ address,
+ WINSDB_OWNER_LOCAL,
+ rec->expire_time);
+ if (rec->addresses == NULL) return NBT_RCODE_SVR;
+
+ DEBUG(5,("WINS: sgroup merge of %s at %s\n",
+ nbt_name_string(packet, rec->name), address));
+
+ return winsdb_modify(winssrv->wins_db, rec, WINSDB_FLAG_ALLOC_VERSION | WINSDB_FLAG_TAKE_OWNERSHIP);
}
/*
uint8_t rcode = NBT_RCODE_OK;
uint16_t nb_flags = packet->additional[0].rdata.netbios.addresses[0].nb_flags;
const char *address = packet->additional[0].rdata.netbios.addresses[0].ipaddr;
+ BOOL mhomed = ((packet->operation & NBT_OPCODE) == NBT_OPCODE_MULTI_HOME_REG);
+ enum wrepl_name_type new_type = wrepl_type(nb_flags, name, mhomed);
+ struct winsdb_addr *winsdb_addr = NULL;
+
+ /*
+ * as a special case, the local master browser name is always accepted
+ * for registration, but never stored, but w2k3 stores it if it's registered
+ * as a group name, (but a query for the 0x1D name still returns not found!)
+ */
+ if (name->type == NBT_NAME_MASTER && !(nb_flags & NBT_NM_GROUP)) {
+ rcode = NBT_RCODE_OK;
+ goto done;
+ }
- /* as a special case, the local master browser name is always accepted
- for registration, but never stored */
- if (name->type == NBT_NAME_MASTER) {
+ /* w2k3 refuses 0x1B names with marked as group */
+ if (name->type == NBT_NAME_PDC && (nb_flags & NBT_NM_GROUP)) {
+ rcode = NBT_RCODE_RFS;
+ goto done;
+ }
+
+ /* w2k3 refuses 0x1C names with out marked as group */
+ if (name->type == NBT_NAME_LOGON && !(nb_flags & NBT_NM_GROUP)) {
+ rcode = NBT_RCODE_RFS;
+ goto done;
+ }
+
+ /* w2k3 refuses 0x1E names with out marked as group */
+ if (name->type == NBT_NAME_BROWSER && !(nb_flags & NBT_NM_GROUP)) {
+ rcode = NBT_RCODE_RFS;
goto done;
}
status = winsdb_lookup(winssrv->wins_db, name, packet, &rec);
if (NT_STATUS_EQUAL(NT_STATUS_OBJECT_NAME_NOT_FOUND, status)) {
- rcode = wins_register_new(nbtsock, packet, src);
+ rcode = wins_register_new(nbtsock, packet, src, new_type);
goto done;
} else if (!NT_STATUS_IS_OK(status)) {
rcode = NBT_RCODE_SVR;
goto done;
- } else if (rec->state != WINS_REC_ACTIVE) {
- winsdb_delete(winssrv, rec);
- rcode = wins_register_new(nbtsock, packet, src);
+ } else if (rec->is_static) {
+ if (rec->type == WREPL_TYPE_GROUP || rec->type == WREPL_TYPE_SGROUP) {
+ rcode = NBT_RCODE_OK;
+ goto done;
+ }
+ rcode = NBT_RCODE_ACT;
goto done;
}
- /* its an active name - first see if the registration is of the right type */
- if ((rec->nb_flags & NBT_NM_GROUP) && !(nb_flags & NBT_NM_GROUP)) {
- DEBUG(2,("WINS: Attempt to register unique name %s when group name is active\n",
- nbt_name_string(packet, name)));
- rcode = NBT_RCODE_ACT;
+ if (rec->type == WREPL_TYPE_GROUP) {
+ if (new_type != WREPL_TYPE_GROUP) {
+ DEBUG(2,("WINS: Attempt to register name %s as non normal group(%u)"
+ " while a normal group is already there\n",
+ nbt_name_string(packet, name), new_type));
+ rcode = NBT_RCODE_ACT;
+ goto done;
+ }
+
+ if (rec->state == WREPL_STATE_ACTIVE) {
+ /* TODO: is this correct? */
+ rcode = wins_update_ttl(nbtsock, packet, rec, NULL, src);
+ goto done;
+ }
+
+ /* TODO: is this correct? */
+ winsdb_delete(winssrv->wins_db, rec);
+ rcode = wins_register_new(nbtsock, packet, src, new_type);
+ goto done;
+ }
+
+ if (rec->state != WREPL_STATE_ACTIVE) {
+ winsdb_delete(winssrv->wins_db, rec);
+ rcode = wins_register_new(nbtsock, packet, src, new_type);
goto done;
}
- /* if its an active unique name, and the registration is for a group, then
- see if the unique name owner still wants the name */
- if (!(rec->nb_flags & NBT_NM_GROUP) && (nb_flags & NBT_NM_GROUP)) {
+ switch (rec->type) {
+ case WREPL_TYPE_UNIQUE:
+ case WREPL_TYPE_MHOMED:
+ /*
+ * if its an active unique name, and the registration is for a group, then
+ * see if the unique name owner still wants the name
+ * TODO: is this correct?
+ */
+ if (new_type == WREPL_TYPE_GROUP || new_type == WREPL_TYPE_GROUP) {
+ wins_register_wack(nbtsock, packet, rec, src);
+ return;
+ }
+
+ /*
+ * if the registration is for an address that is currently active, then
+ * just update the expiry time of the record and the address
+ * TODO: is this correct?
+ */
+ winsdb_addr = winsdb_addr_list_check(rec->addresses, address);
+ if (winsdb_addr) {
+ rcode = wins_update_ttl(nbtsock, packet, rec, winsdb_addr, src);
+ goto done;
+ }
+
+ /*
+ * we have to do a WACK to see if the current owner is willing
+ * to give up its claim
+ */
wins_register_wack(nbtsock, packet, rec, src);
return;
- }
- /* if the registration is for a group, then just update the expiry time
- and we are done */
- if (IS_GROUP_NAME(name, nb_flags)) {
- wins_update_ttl(nbtsock, packet, rec, src);
+ case WREPL_TYPE_GROUP:
+ /* this should not be reached as normal groups are handled above */
+ DEBUG(0,("BUG at %s\n",__location__));
+ rcode = NBT_RCODE_ACT;
goto done;
- }
- /* if the registration is for an address that is currently active, then
- just update the expiry time */
- if (winsdb_addr_list_check(rec->addresses, address)) {
- wins_update_ttl(nbtsock, packet, rec, src);
+ case WREPL_TYPE_SGROUP:
+ /* if the new record isn't also a special group, refuse the registration */
+ if (new_type != WREPL_TYPE_SGROUP) {
+ DEBUG(2,("WINS: Attempt to register name %s as non special group(%u)"
+ " while a special group is already there\n",
+ nbt_name_string(packet, name), new_type));
+ rcode = NBT_RCODE_ACT;
+ goto done;
+ }
+
+ /*
+ * if the registration is for an address that is currently active, then
+ * just update the expiry time
+ * just update the expiry time of the record and the address
+ * TODO: is this correct?
+ */
+ winsdb_addr = winsdb_addr_list_check(rec->addresses, address);
+ if (winsdb_addr) {
+ rcode = wins_update_ttl(nbtsock, packet, rec, winsdb_addr, src);
+ goto done;
+ }
+
+ rcode = wins_sgroup_merge(nbtsock, packet, rec, address, src);
goto done;
}
- /* we have to do a WACK to see if the current owner is willing
- to give up its claim */
- wins_register_wack(nbtsock, packet, rec, src);
- return;
-
done:
nbtd_name_registration_reply(nbtsock, packet, src, rcode);
}
-
-
/*
query a name
*/
struct nbt_name *name = &packet->questions[0].name;
struct winsdb_record *rec;
const char **addresses;
+ uint16_t nb_flags = 0; /* TODO: ... */
+
+ if (name->type == NBT_NAME_MASTER) {
+ goto notfound;
+ }
status = winsdb_lookup(winssrv->wins_db, name, packet, &rec);
- if (!NT_STATUS_IS_OK(status) || rec->state != WINS_REC_ACTIVE) {
- nbtd_negative_name_query_reply(nbtsock, packet, src);
- return;
+ if (!NT_STATUS_IS_OK(status)) {
+ goto notfound;
}
- addresses = winsdb_addr_string_list(packet, rec->addresses);
- if (addresses == NULL) {
- nbtd_negative_name_query_reply(nbtsock, packet, src);
- return;
+ /*
+ * for group's we always reply with
+ * 255.255.255.255 as address, even if
+ * the record is released or tombstoned
+ */
+ if (rec->type == WREPL_TYPE_GROUP) {
+ addresses = talloc_array(packet, const char *, 2);
+ if (addresses == NULL) {
+ nbtd_negative_name_query_reply(nbtsock, packet, src);
+ return;
+ }
+ addresses[0] = WINSDB_GROUP_ADDRESS;
+ addresses[1] = NULL;
+ goto found;
+ }
+
+ if (rec->state != WREPL_STATE_ACTIVE) {
+ goto notfound;
}
+ addresses = winsdb_addr_string_list(packet, rec->addresses);
+ if (!addresses) {
+ goto notfound;
+ }
+found:
nbtd_name_query_reply(nbtsock, packet, src, name,
- 0, rec->nb_flags, addresses);
+ 0, nb_flags, addresses);
+ return;
+
+notfound:
+ nbtd_negative_name_query_reply(nbtsock, packet, src);
}
/*
struct wins_server *winssrv = iface->nbtsrv->winssrv;
struct nbt_name *name = &packet->questions[0].name;
struct winsdb_record *rec;
+ uint32_t modify_flags = 0;
+ uint8_t ret;
status = winsdb_lookup(winssrv->wins_db, name, packet, &rec);
- if (!NT_STATUS_IS_OK(status) ||
- rec->state != WINS_REC_ACTIVE ||
- IS_GROUP_NAME(name, rec->nb_flags)) {
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ if (rec->is_static) {
+ if (rec->type == WREPL_TYPE_UNIQUE || rec->type == WREPL_TYPE_MHOMED) {
+ goto done;
+ }
+ nbtd_name_release_reply(nbtsock, packet, src, NBT_RCODE_ACT);
+ return;
+ }
+
+ if (rec->state != WREPL_STATE_ACTIVE) {
+ goto done;
+ }
+
+ /*
+ * TODO: do we need to check if
+ * src->addr matches packet->additional[0].rdata.netbios.addresses[0].ipaddr
+ * here?
+ */
+
+ /*
+ * we only allow releases from an owner - other releases are
+ * silently ignored
+ */
+ if (!winsdb_addr_list_check(rec->addresses, src->addr)) {
goto done;
}
- /* we only allow releases from an owner - other releases are
- silently ignored */
- if (winsdb_addr_list_check(rec->addresses, src->addr)) {
- const char *address = packet->additional[0].rdata.netbios.addresses[0].ipaddr;
+ DEBUG(4,("WINS: released name %s from %s\n", nbt_name_string(rec, rec->name), src->addr));
- DEBUG(4,("WINS: released name %s at %s\n", nbt_name_string(rec, rec->name), address));
- winsdb_addr_list_remove(rec->addresses, address);
- if (rec->addresses[0] == NULL) {
- rec->state = WINS_REC_RELEASED;
+ switch (rec->type) {
+ case WREPL_TYPE_UNIQUE:
+ rec->state = WREPL_STATE_RELEASED;
+ break;
+
+ case WREPL_TYPE_GROUP:
+ rec->state = WREPL_STATE_RELEASED;
+ break;
+
+ case WREPL_TYPE_SGROUP:
+ winsdb_addr_list_remove(rec->addresses, src->addr);
+ /* TODO: do we need to take the ownership here? */
+ if (winsdb_addr_list_length(rec->addresses) == 0) {
+ rec->state = WREPL_STATE_RELEASED;
+ }
+ break;
+
+ case WREPL_TYPE_MHOMED:
+ winsdb_addr_list_remove(rec->addresses, src->addr);
+ /* TODO: do we need to take the ownership here? */
+ if (winsdb_addr_list_length(rec->addresses) == 0) {
+ rec->state = WREPL_STATE_RELEASED;
}
- winsdb_modify(winssrv, rec);
+ break;
+ }
+
+ if (rec->state == WREPL_STATE_RELEASED) {
+ rec->expire_time = time(NULL) + winssrv->config.tombstone_interval;
}
+ ret = winsdb_modify(winssrv->wins_db, rec, modify_flags);
+ if (ret != NBT_RCODE_OK) {
+ DEBUG(1,("WINS: FAILED: released name %s at %s: error:%u\n",
+ nbt_name_string(rec, rec->name), src->addr, ret));
+ }
done:
/* we match w2k3 by always giving a positive reply to name releases. */
nbtd_name_release_reply(nbtsock, packet, src, NBT_RCODE_OK);
*/
NTSTATUS nbtd_winsserver_init(struct nbtd_server *nbtsrv)
{
+ uint32_t tombstone_interval;
+
if (!lp_wins_support()) {
nbtsrv->winssrv = NULL;
return NT_STATUS_OK;
nbtsrv->winssrv = talloc_zero(nbtsrv, struct wins_server);
NT_STATUS_HAVE_NO_MEMORY(nbtsrv->winssrv);
- nbtsrv->winssrv->max_ttl = lp_max_wins_ttl();
- nbtsrv->winssrv->min_ttl = lp_min_wins_ttl();
+ nbtsrv->winssrv->config.max_renew_interval = lp_max_wins_ttl();
+ nbtsrv->winssrv->config.min_renew_interval = lp_min_wins_ttl();
+ tombstone_interval = lp_parm_int(-1,"wreplsrv","tombstone_interval", 6*24*60*60);
+ nbtsrv->winssrv->config.tombstone_interval = tombstone_interval;
nbtsrv->winssrv->wins_db = winsdb_connect(nbtsrv->winssrv);
if (!nbtsrv->winssrv->wins_db) {
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