s4-pynet: added replicate_init() and replicate_chunk() calls

these calls allow python code to pass chunks from DRS replication
calls into the code that applies the chunks to a database

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>

diff --git a/source4/libnet/py_net.c b/source4/libnet/py_net.c
index d4a4670f135feea82a3d7ebb55e451b57ba46c56..0b1eb7b9164498a7f2d6db2f135da3b7b5e78175 100644 (file)
--- a/source4/libnet/py_net.c
+++ b/source4/libnet/py_net.c
@@ -26,6 +26,9 @@
 #include "lib/events/events.h"
 #include "param/param.h"
 #include "param/pyparam.h"
 #include "lib/events/events.h"
 #include "param/param.h"
 #include "param/pyparam.h"

+#include "lib/ldb/pyldb.h"
+#include "auth/gensec/gensec.h"
+#include "librpc/rpc/pyrpc.h"

 
 typedef struct {
        PyObject_HEAD
 
 typedef struct {
        PyObject_HEAD


@@ -306,58 +309,150 @@ static PyObject *py_net_vampire(py_net_Object *self, PyObject *args, PyObject *k
        return ret;
 }
 
        return ret;
 }
 

+struct replicate_state {
+       void *vampire_state;
+       dcerpc_InterfaceObject *drs_pipe;
+       struct libnet_BecomeDC_StoreChunk chunk;
+       DATA_BLOB gensec_skey;
+       struct libnet_BecomeDC_Partition partition;
+       struct libnet_BecomeDC_Forest forest;
+       struct libnet_BecomeDC_DestDSA dest_dsa;
+};

 
 

-static PyObject *py_net_replicate(py_net_Object *self, PyObject *args, PyObject *kwargs)
+/*
+  setup for replicate_chunk() calls
+ */
+static PyObject *py_net_replicate_init(py_net_Object *self, PyObject *args, PyObject *kwargs)

 {
 {

-       const char *kwnames[] = { "domain", "netbios_name",
-                                 "domain_sid", "realm", "server", "join_password",
-                                 "kvno", "target_dir", NULL };
+       const char *kwnames[] = { "samdb", "lp", "drspipe", NULL };
+       PyObject *py_ldb, *py_lp, *py_drspipe;
+       struct ldb_context *samdb;
+       struct loadparm_context *lp;
+       struct replicate_state *s;

        NTSTATUS status;
        NTSTATUS status;

-       TALLOC_CTX *mem_ctx;
-       struct libnet_Replicate r;
-       unsigned kvno;
-       const char *sidstr;

 
 

-       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssssssI|z",
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OOO",

                                         discard_const_p(char *, kwnames),
                                         discard_const_p(char *, kwnames),

-                                        &r.in.domain_name,
-                                        &r.in.netbios_name,
-                                        &sidstr,
-                                        &r.in.realm,
-                                        &r.in.server,
-                                        &r.in.join_password,
-                                        &kvno,
-                                        &r.in.targetdir)) {
+                                        &py_ldb, &py_lp, &py_drspipe)) {

                return NULL;
        }
 
                return NULL;
        }
 

-       r.out.error_string = NULL;
+       s = talloc_zero(NULL, struct replicate_state);
+       if (!s) return NULL;

 
 

-       mem_ctx = talloc_new(NULL);
-       if (mem_ctx == NULL) {
-               PyErr_NoMemory();
+       lp = lpcfg_from_py_object(s, py_lp);
+       if (lp == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Expected lp object");
+               talloc_free(s);

                return NULL;
        }
 
                return NULL;
        }
 

-       r.in.kvno       = kvno;
-       r.in.domain_sid = dom_sid_parse_talloc(mem_ctx, sidstr);
-
-       if (!r.in.domain_sid) {
-               PyErr_Format(PyExc_RuntimeError, "Bad domain_sid %s", sidstr);
-               talloc_free(mem_ctx);
+       samdb = PyLdb_AsLdbContext(py_ldb);
+       if (samdb == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Expected ldb object");
+               talloc_free(s);

                return NULL;
        }
 
                return NULL;
        }
 

-       status = libnet_Replicate(self->libnet_ctx, mem_ctx, &r);
+       s->drs_pipe = (dcerpc_InterfaceObject *)(py_drspipe);

 
 

+       s->vampire_state = libnet_vampire_replicate_init(s, samdb, lp);
+       if (s->vampire_state == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Failed to initialise vampire_state");
+               talloc_free(s);
+               return NULL;
+       }
+
+       status = gensec_session_key(s->drs_pipe->pipe->conn->security_state.generic_state,
+                                   &s->gensec_skey);

        if (!NT_STATUS_IS_OK(status)) {
        if (!NT_STATUS_IS_OK(status)) {

-               PyErr_SetString(PyExc_RuntimeError,
-                               r.out.error_string ? r.out.error_string : nt_errstr(status));
-               talloc_free(mem_ctx);
+               PyErr_Format(PyExc_RuntimeError, "Unable to get session key from drspipe: %s",
+                            nt_errstr(status));
+               talloc_free(s);

                return NULL;
        }
 
                return NULL;
        }
 

-       talloc_free(mem_ctx);
+       s->chunk.gensec_skey = &s->gensec_skey;
+       s->chunk.partition = &s->partition;
+       s->chunk.forest = &s->forest;
+       s->chunk.dest_dsa = &s->dest_dsa;
+
+       return PyCObject_FromTallocPtr(s);
+}
+
+
+/*
+  process one replication chunk
+ */
+static PyObject *py_net_replicate_chunk(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "state", "level", "ctr", "schema", NULL };
+       PyObject *py_state, *py_ctr, *py_schema;
+       struct replicate_state *s;
+       unsigned level;
+       NTSTATUS (*chunk_handler)(void *private_data, const struct libnet_BecomeDC_StoreChunk *c);
+       NTSTATUS status;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OIO|O",
+                                        discard_const_p(char *, kwnames),
+                                        &py_state, &level, &py_ctr, &py_schema)) {
+               return NULL;
+       }
+
+       s = talloc_get_type(PyCObject_AsVoidPtr(py_state), struct replicate_state);
+       if (!s) {
+               PyErr_SetString(PyExc_TypeError, "Expected replication_state");
+               return NULL;
+       }
+
+       switch (level) {
+       case 1:
+               if (strcmp("drsuapi.DsGetNCChangesCtr1", Py_TYPE(py_ctr)->tp_name) != 0) {
+                       PyErr_SetString(PyExc_TypeError, "Expected DsGetNCChangesCtr1 type for ctr");
+                       return NULL;
+               }
+               s->chunk.ctr1                         = py_talloc_get_ptr(py_ctr);
+               s->partition.nc                       = *s->chunk.ctr1->naming_context;
+               s->partition.more_data                = s->chunk.ctr1->more_data;
+               s->partition.source_dsa_guid          = s->chunk.ctr1->source_dsa_guid;
+               s->partition.source_dsa_invocation_id = s->chunk.ctr1->source_dsa_invocation_id;
+               s->partition.highwatermark            = s->chunk.ctr1->new_highwatermark;
+               break;
+       case 6:
+               if (strcmp("drsuapi.DsGetNCChangesCtr6", Py_TYPE(py_ctr)->tp_name) != 0) {
+                       PyErr_SetString(PyExc_TypeError, "Expected DsGetNCChangesCtr6 type for ctr");
+                       return NULL;
+               }
+               s->chunk.ctr6                         = py_talloc_get_ptr(py_ctr);
+               s->partition.nc                       = *s->chunk.ctr6->naming_context;
+               s->partition.more_data                = s->chunk.ctr6->more_data;
+               s->partition.source_dsa_guid          = s->chunk.ctr6->source_dsa_guid;
+               s->partition.source_dsa_invocation_id = s->chunk.ctr6->source_dsa_invocation_id;
+               s->partition.highwatermark            = s->chunk.ctr6->new_highwatermark;
+               break;
+       default:
+               PyErr_Format(PyExc_TypeError, "Bad level %u in replicate_chunk", level);
+               return NULL;
+       }
+
+       chunk_handler = libnet_vampire_cb_store_chunk;
+       if (py_schema) {
+               if (!PyBool_Check(py_schema)) {
+                       PyErr_SetString(PyExc_TypeError, "Expected boolean schema");
+                       return NULL;
+               }
+               if (py_schema == Py_True) {
+                       chunk_handler = libnet_vampire_cb_schema_chunk;
+               }
+       }
+
+       s->chunk.ctr_level = level;
+
+       status = chunk_handler(s->vampire_state, &s->chunk);
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_Format(PyExc_TypeError, "Failed to process chunk: %s", nt_errstr(status));
+               return NULL;
+       }

 
        return Py_None;
 }
 
        return Py_None;
 }


@@ -365,8 +460,11 @@ static PyObject *py_net_replicate(py_net_Object *self, PyObject *args, PyObject
 static const char py_net_vampire_doc[] = "vampire(domain, target_dir=None)\n"
                                         "Vampire a domain.";
 
 static const char py_net_vampire_doc[] = "vampire(domain, target_dir=None)\n"
                                         "Vampire a domain.";
 

-static const char py_net_replicate_doc[] = "replicate(domain, netbios_name, domain_sid, realm, server, join_password, kvno, target_dir=None)\n"
-                                        "Replicate a domain.";
+static const char py_net_replicate_init_doc[] = "replicate_init(samdb, lp, drspipe)\n"
+                                        "Setup for replicate_chunk calls.";
+
+static const char py_net_replicate_chunk_doc[] = "replicate_chunk(state, level, ctr, schema)\n"
+                                        "Process replication for one chunk";

 
 static PyMethodDef net_obj_methods[] = {
        {"join", (PyCFunction)py_net_join, METH_VARARGS|METH_KEYWORDS, py_net_join_doc},
 
 static PyMethodDef net_obj_methods[] = {
        {"join", (PyCFunction)py_net_join, METH_VARARGS|METH_KEYWORDS, py_net_join_doc},


@@ -376,7 +474,8 @@ static PyMethodDef net_obj_methods[] = {
        {"create_user", (PyCFunction)py_net_user_create, METH_VARARGS|METH_KEYWORDS, py_net_create_user_doc},
        {"delete_user", (PyCFunction)py_net_user_delete, METH_VARARGS|METH_KEYWORDS, py_net_delete_user_doc},
        {"vampire", (PyCFunction)py_net_vampire, METH_VARARGS|METH_KEYWORDS, py_net_vampire_doc},
        {"create_user", (PyCFunction)py_net_user_create, METH_VARARGS|METH_KEYWORDS, py_net_create_user_doc},
        {"delete_user", (PyCFunction)py_net_user_delete, METH_VARARGS|METH_KEYWORDS, py_net_delete_user_doc},
        {"vampire", (PyCFunction)py_net_vampire, METH_VARARGS|METH_KEYWORDS, py_net_vampire_doc},

-       {"replicate", (PyCFunction)py_net_replicate, METH_VARARGS|METH_KEYWORDS, py_net_replicate_doc},
+       {"replicate_init", (PyCFunction)py_net_replicate_init, METH_VARARGS|METH_KEYWORDS, py_net_replicate_init_doc},
+       {"replicate_chunk", (PyCFunction)py_net_replicate_chunk, METH_VARARGS|METH_KEYWORDS, py_net_replicate_chunk_doc},

        { NULL }
 };
 
        { NULL }
 };