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-rw-r--r--source4/librpc/rpc/dcerpc_connect.c100
1 files changed, 95 insertions, 5 deletions
diff --git a/source4/librpc/rpc/dcerpc_connect.c b/source4/librpc/rpc/dcerpc_connect.c
index d8fedd4301..417f3d3e49 100644
--- a/source4/librpc/rpc/dcerpc_connect.c
+++ b/source4/librpc/rpc/dcerpc_connect.c
@@ -588,6 +588,9 @@ static void continue_pipe_connect(struct composite_context *c, struct pipe_conne
static void continue_pipe_auth(struct composite_context *ctx);
+/*
+ Stage 2 of pipe_connect_b: Receive result of endpoint mapping
+*/
static void continue_map_binding(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -608,6 +611,9 @@ static void continue_map_binding(struct composite_context *ctx)
}
+/*
+ Stage 2 of pipe_connect_b: Continue connection after endpoint is known
+*/
static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
{
struct dcerpc_pipe_connect pc;
@@ -625,6 +631,7 @@ static void continue_connect(struct composite_context *c, struct pipe_connect_st
pc.interface = s->table;
pc.creds = s->credentials;
+ /* connect dcerpc pipe depending on required transport */
switch (s->binding->transport) {
case NCACN_NP:
if (pc.binding->flags & DCERPC_SMB2) {
@@ -667,11 +674,16 @@ static void continue_connect(struct composite_context *c, struct pipe_connect_st
return;
default:
+ /* looks like a transport we don't support now */
composite_error(c, NT_STATUS_NOT_SUPPORTED);
}
}
+/*
+ Stage 3 of pipe_connect_b: Receive result of pipe connect request on
+ named pipe on smb2
+*/
static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -686,6 +698,10 @@ static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
}
+/*
+ Stage 3 of pipe_connect_b: Receive result of pipe connect request on
+ named pipe on smb
+*/
static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -700,6 +716,9 @@ static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
}
+/*
+ Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
+*/
static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -714,6 +733,9 @@ static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
}
+/*
+ Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
+*/
static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -728,6 +750,9 @@ static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
}
+/*
+ Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
+*/
static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -742,6 +767,10 @@ static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
}
+/*
+ Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
+ depending on credentials and binding flags passed.
+*/
static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
{
struct composite_context *auth_bind_req;
@@ -760,6 +789,10 @@ static void continue_pipe_connect(struct composite_context *c, struct pipe_conne
}
+/*
+ Stage 5 of pipe_connect_b: Receive result of pipe authentication request
+ and say if all went ok
+*/
static void continue_pipe_auth(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -772,6 +805,10 @@ static void continue_pipe_auth(struct composite_context *ctx)
}
+/*
+ start a request to open a rpc connection to a rpc pipe, using
+ specified binding structure to determine the endpoint and options
+*/
struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
struct dcerpc_pipe **pp,
struct dcerpc_binding *binding,
@@ -800,9 +837,11 @@ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
s->pipe = dcerpc_pipe_init(c, ev);
if (composite_nomem(s->pipe, c)) return c;
+ /* get event context from initialised dcerpc pipe */
c->event_ctx = s->pipe->conn->event_ctx;
(*pp) = s->pipe;
+ /* store parameters in state structure */
s->binding = binding;
s->table = table;
s->credentials = credentials;
@@ -827,6 +866,9 @@ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
}
+/*
+ receive result of a request to open a rpc connection to a rpc pipe
+*/
NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
struct dcerpc_pipe **p)
{
@@ -872,6 +914,12 @@ struct pipe_conn_state {
static void continue_pipe_connect_b(struct composite_context *ctx);
+
+/*
+ Initiate rpc connection to a rpc pipe, using the specified string
+ binding to determine the endpoint and options.
+ The string is to be parsed to a binding structure first.
+*/
struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
struct dcerpc_pipe **pp,
const char *binding,
@@ -885,6 +933,7 @@ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
struct dcerpc_binding *b;
struct composite_context *pipe_conn_req;
+ /* composite context allocation and setup */
c = talloc_zero(parent_ctx, struct composite_context);
if (c == NULL) return NULL;
@@ -894,6 +943,7 @@ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
c->state = COMPOSITE_STATE_IN_PROGRESS;
c->private_data = s;
+ /* parse binding string to the structure */
status = dcerpc_parse_binding(c, binding, &b);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
@@ -902,9 +952,15 @@ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
}
DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
-
+
+ /*
+ start connecting to a rpc pipe after binding structure
+ is established
+ */
pipe_conn_req = dcerpc_pipe_connect_b_send(c, &s->pipe, b, table,
credentials, ev);
+
+ /* event context for created dcerpc_pipe would be useful... */
c->event_ctx = s->pipe->conn->event_ctx;
if (composite_nomem(pipe_conn_req, c)) return c;
@@ -914,6 +970,10 @@ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
}
+/*
+ Stage 2 of pipe_connect: Receive result of actual pipe connect request
+ and say if we're done ok
+*/
static void continue_pipe_connect_b(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -928,6 +988,10 @@ static void continue_pipe_connect_b(struct composite_context *ctx)
}
+/*
+ Receive result of pipe connect (using binding string) request
+ and return connected pipe structure.
+*/
NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
struct dcerpc_pipe **pp)
@@ -947,7 +1011,7 @@ NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
/*
- open a rpc connection to a rpc pipe, using the specified string
+ Open a rpc connection to a rpc pipe, using the specified string
binding to determine the endpoint and options - sync version
*/
NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
@@ -978,6 +1042,10 @@ static void continue_open_pipe(struct composite_context *ctx);
static void continue_pipe_open(struct composite_context *c);
+/*
+ Send request to create a secondary dcerpc connection from a primary
+ connection
+*/
struct composite_context* dcerpc_secondary_connection_send(struct dcerpc_pipe *p,
struct dcerpc_binding *b)
{
@@ -987,6 +1055,7 @@ struct composite_context* dcerpc_secondary_connection_send(struct dcerpc_pipe *p
struct composite_context *pipe_tcp_req;
struct composite_context *pipe_ncalrpc_req;
+ /* composite context allocation and setup */
c = talloc_zero(p, struct composite_context);
if (c == NULL) return NULL;
@@ -1004,11 +1073,14 @@ struct composite_context* dcerpc_secondary_connection_send(struct dcerpc_pipe *p
s->pipe = p;
s->binding = b;
+ /* initialise second dcerpc pipe based on primary pipe's event context */
s->pipe2 = dcerpc_pipe_init(c, s->pipe->conn->event_ctx);
if (composite_nomem(s->pipe2, c)) return c;
+ /* open second dcerpc pipe using the same transport as for primary pipe */
switch (s->pipe->conn->transport.transport) {
case NCACN_NP:
+ /* get smb tree of primary dcerpc pipe opened on smb */
s->tree = dcerpc_smb_tree(s->pipe->conn);
if (!s->tree) {
composite_error(c, NT_STATUS_INVALID_PARAMETER);
@@ -1040,6 +1112,7 @@ struct composite_context* dcerpc_secondary_connection_send(struct dcerpc_pipe *p
return c;
default:
+ /* looks like a transport we don't support */
composite_error(c, NT_STATUS_NOT_SUPPORTED);
}
@@ -1047,6 +1120,9 @@ struct composite_context* dcerpc_secondary_connection_send(struct dcerpc_pipe *p
}
+/*
+ Stage 2 of secondary_connection: Receive result of pipe open request on smb
+*/
static void continue_open_smb(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -1059,6 +1135,9 @@ static void continue_open_smb(struct composite_context *ctx)
}
+/*
+ Stage 2 of secondary_connection: Receive result of pipe open request on tcp/ip
+*/
static void continue_open_tcp(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -1071,6 +1150,9 @@ static void continue_open_tcp(struct composite_context *ctx)
}
+/*
+ Stage 2 of secondary_connection: Receive result of pipe open request on ncalrpc
+*/
static void continue_open_pipe(struct composite_context *ctx)
{
struct composite_context *c = talloc_get_type(ctx->async.private_data,
@@ -1083,6 +1165,10 @@ static void continue_open_pipe(struct composite_context *ctx)
}
+/*
+ Stage 3 of secondary_connection: Get binding data and flags from primary pipe
+ and say if we're done ok.
+*/
static void continue_pipe_open(struct composite_context *c)
{
struct sec_conn_state *s;
@@ -1100,6 +1186,10 @@ static void continue_pipe_open(struct composite_context *c)
}
+/*
+ Receive result of secondary rpc connection request and return
+ second dcerpc pipe.
+*/
NTSTATUS dcerpc_secondary_connection_recv(struct composite_context *c,
struct dcerpc_pipe **p2)
{
@@ -1117,11 +1207,11 @@ NTSTATUS dcerpc_secondary_connection_recv(struct composite_context *c,
}
/*
- create a secondary dcerpc connection from a primary connection
+ Create a secondary dcerpc connection from a primary connection
- sync version
- if the primary is a SMB connection then the secondary connection
- will be on the same SMB connection, but use a new fnum
+ If the primary is a SMB connection then the secondary connection
+ will be on the same SMB connection, but using a new fnum
*/
NTSTATUS dcerpc_secondary_connection(struct dcerpc_pipe *p,
struct dcerpc_pipe **p2,