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authorVolker Lendecke <vlendec@samba.org>2005-10-28 11:02:42 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:45:27 -0500
commit134b2488c82ae13392121f71e4960178a38f3e01 (patch)
treef002f6d68b66654d18f53a46df5459fbfd241b1e /source4/libcli/raw
parent3dc75cc84f92af9a72d52e7c9299b47c01368544 (diff)
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r11369: Implement socket_connect_multi: Connect to multiple ipv4 tcp ports in
sequence, with a 2-millisecond timeout between firing the syn packets. Build smbcli_sock_connect_send upon that. Volker (This used to be commit 5718df44d90d113304c5deed1e2e7f82ff9e928f)
Diffstat (limited to 'source4/libcli/raw')
-rw-r--r--source4/libcli/raw/clisocket.c324
1 files changed, 140 insertions, 184 deletions
diff --git a/source4/libcli/raw/clisocket.c b/source4/libcli/raw/clisocket.c
index 688ee8a78b..8b8a0b0faf 100644
--- a/source4/libcli/raw/clisocket.c
+++ b/source4/libcli/raw/clisocket.c
@@ -27,206 +27,130 @@
#include "libcli/composite/composite.h"
#include "lib/socket/socket.h"
-/*
- this private structure is used during async connection handling
-*/
-struct clisocket_connect {
- int port_num;
- int *iports;
- struct smbcli_socket *sock;
- const char *dest_host_addr;
- const char *dest_hostname;
+struct sock_connect_state {
+ struct composite_context *ctx;
+ const char *host_name;
+ int num_ports;
+ uint16_t *ports;
+ struct smbcli_socket *result;
};
-
/*
- create a smbcli_socket context
- The event_ctx is optional - if not supplied one will be created
+ connect a smbcli_socket context to an IP/port pair
+ if port is 0 then choose 445 then 139
*/
-struct smbcli_socket *smbcli_sock_init(TALLOC_CTX *mem_ctx,
- struct event_context *event_ctx)
+
+static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);
+
+struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
+ const char *host_addr,
+ int port,
+ const char *host_name,
+ struct event_context *event_ctx)
{
- struct smbcli_socket *sock;
+ struct composite_context *result, *ctx;
+ struct sock_connect_state *state;
- sock = talloc_zero(mem_ctx, struct smbcli_socket);
- if (!sock) {
- return NULL;
- }
+ result = talloc_zero(mem_ctx, struct composite_context);
+ if (result == NULL) goto failed;
+ result->state = COMPOSITE_STATE_IN_PROGRESS;
- if (event_ctx) {
- sock->event.ctx = talloc_reference(sock, event_ctx);
+ if (event_ctx != NULL) {
+ result->event_ctx = talloc_reference(result, event_ctx);
} else {
- sock->event.ctx = event_context_init(sock);
- }
- if (sock->event.ctx == NULL) {
- talloc_free(sock);
- return NULL;
+ result->event_ctx = event_context_init(result);
}
- /* ensure we don't get SIGPIPE */
- BlockSignals(True,SIGPIPE);
+ if (result->event_ctx == NULL) goto failed;
- return sock;
-}
+ state = talloc(result, struct sock_connect_state);
+ if (state == NULL) goto failed;
+ state->ctx = result;
+ result->private_data = state;
-static NTSTATUS smbcli_sock_connect_one(struct smbcli_socket *sock,
- const char *hostaddr, int port,
- struct composite_context *c);
+ state->host_name = talloc_strdup(state, host_name);
+ if (state->host_name == NULL) goto failed;
-/*
- handle socket write events during an async connect. These happen when the OS
- has either completed the connect() or has returned an error
-*/
-static void smbcli_sock_connect_handler(struct event_context *ev, struct fd_event *fde,
- uint16_t flags, void *private_data)
-{
- struct composite_context *c = talloc_get_type(private_data, struct composite_context);
- struct clisocket_connect *conn = talloc_get_type(c->private_data, struct clisocket_connect);
- int i;
-
- c->status = socket_connect_complete(conn->sock->sock, 0);
- if (NT_STATUS_IS_OK(c->status)) {
- socket_set_option(conn->sock->sock, lp_socket_options(), NULL);
- conn->sock->hostname = talloc_strdup(conn->sock, conn->dest_hostname);
- c->state = COMPOSITE_STATE_DONE;
- if (c->async.fn) {
- c->async.fn(c);
- }
- return;
- }
+ if (port == 0) {
+ const char **ports = lp_smb_ports();
+ int i;
- /* that port failed - try the next port */
- for (i=conn->port_num+1;conn->iports[i];i++) {
- conn->port_num = i;
- c->status = smbcli_sock_connect_one(conn->sock,
- conn->dest_host_addr,
- conn->iports[i], c);
- if (NT_STATUS_IS_OK(c->status) ||
- NT_STATUS_EQUAL(c->status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- return;
+ for (i=0;ports[i];i++) /* noop */ ;
+ if (i == 0) {
+ DEBUG(3, ("no smb ports defined\n"));
+ goto failed;
}
+ state->num_ports = i;
+ state->ports = talloc_array(state, uint16_t, i);
+ if (state->ports == NULL) goto failed;
+ for (i=0;ports[i];i++) {
+ state->ports[i] = atoi(ports[i]);
+ }
+ } else {
+ state->ports = talloc_array(state, uint16_t, 1);
+ if (state->ports == NULL) goto failed;
+ state->num_ports = 1;
+ state->ports[0] = port;
}
- c->state = COMPOSITE_STATE_ERROR;
- if (c->async.fn) {
- c->async.fn(c);
- }
-}
-
-
-/*
- try to connect to the given address/port
-*/
-static NTSTATUS smbcli_sock_connect_one(struct smbcli_socket *sock,
- const char *hostaddr, int port,
- struct composite_context *c)
-{
- NTSTATUS status;
-
- if (sock->sock) {
- talloc_free(sock->sock);
- sock->sock = NULL;
- }
- talloc_free(sock->event.fde);
-
- status = socket_create("ip", SOCKET_TYPE_STREAM, &sock->sock, 0);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- talloc_steal(sock, sock->sock);
-
- /* we initially look for write - see the man page on
- non-blocking connect */
- sock->event.fde = event_add_fd(sock->event.ctx, sock, socket_get_fd(sock->sock),
- EVENT_FD_WRITE, smbcli_sock_connect_handler, c);
+ ctx = socket_connect_multi_send(state, host_addr,
+ state->num_ports, state->ports,
+ state->ctx->event_ctx);
+ if (ctx == NULL) goto failed;
+ ctx->async.fn = smbcli_sock_connect_recv_conn;
+ ctx->async.private_data = state;
+ return result;
- sock->port = port;
- set_blocking(socket_get_fd(sock->sock), False);
-
- return socket_connect(sock->sock, NULL, 0, hostaddr, port, 0);
+failed:
+ talloc_free(result);
+ return NULL;
}
-
-/*
- connect a smbcli_socket context to an IP/port pair
- if port is 0 then choose 445 then 139
-
- this is the async send side of the interface
-*/
-struct composite_context *smbcli_sock_connect_send(struct smbcli_socket *sock,
- const char *host_addr, int port,
- const char *host_name)
+static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
{
- struct composite_context *c;
- struct clisocket_connect *conn;
- int i;
+ struct sock_connect_state *state =
+ talloc_get_type(ctx->async.private_data,
+ struct sock_connect_state);
+ struct socket_context *sock;
+ uint16_t port;
- c = talloc_zero(sock, struct composite_context);
- if (c == NULL) return NULL;
+ state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
+ &port);
+ if (!composite_is_ok(state->ctx)) return;
- c->event_ctx = sock->event.ctx;
+ state->ctx->status =
+ socket_set_option(sock, lp_socket_options(), NULL);
+ if (!composite_is_ok(state->ctx)) return;
- conn = talloc(c, struct clisocket_connect);
- if (conn == NULL) goto failed;
- conn->sock = sock;
+ state->result = talloc_zero(state, struct smbcli_socket);
+ if (composite_nomem(state->result, state->ctx)) return;
- /* work out what ports we will try */
- if (port == 0) {
- const char **ports = lp_smb_ports();
- for (i=0;ports[i];i++) /* noop */ ;
- conn->iports = talloc_array(c, int, i+1);
- if (conn->iports == NULL) goto failed;
- for (i=0;ports[i];i++) {
- conn->iports[i] = atoi(ports[i]);
- }
- conn->iports[i] = 0;
- } else {
- conn->iports = talloc_array(c, int, 2);
- if (conn->iports == NULL) goto failed;
- conn->iports[0] = port;
- conn->iports[1] = 0;
- }
+ state->result->sock = talloc_steal(state->result, sock);
+ state->result->port = port;
+ state->result->hostname = talloc_steal(sock, state->host_name);
- conn->dest_host_addr = talloc_strdup(c, host_addr);
- if (conn->dest_host_addr == NULL) goto failed;
-
- conn->dest_hostname = talloc_strdup(c, host_name);
- if (conn->dest_hostname == NULL) goto failed;
-
- c->private_data = conn;
- c->state = COMPOSITE_STATE_IN_PROGRESS;
-
- /* startup the connect process for each port in turn until one
- succeeds or tells us that it is pending */
- for (i=0;conn->iports[i];i++) {
- conn->port_num = i;
- conn->sock->port = conn->iports[i];
- c->status = smbcli_sock_connect_one(sock,
- conn->dest_host_addr,
- conn->iports[i], c);
- if (NT_STATUS_IS_OK(c->status) ||
- NT_STATUS_EQUAL(c->status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- return c;
- }
- }
+ state->result->event.ctx =
+ talloc_reference(state->result, state->ctx->event_ctx);
+ if (composite_nomem(state->result->event.ctx, state->ctx)) return;
- c->state = COMPOSITE_STATE_ERROR;
- return c;
-
-failed:
- talloc_free(c);
- return NULL;
+ composite_done(state->ctx);
}
/*
finish a smbcli_sock_connect_send() operation
*/
-NTSTATUS smbcli_sock_connect_recv(struct composite_context *c)
+NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
+ TALLOC_CTX *mem_ctx,
+ struct smbcli_socket **result)
{
- NTSTATUS status;
- status = composite_wait(c);
+ NTSTATUS status = composite_wait(c);
+ if (NT_STATUS_IS_OK(status)) {
+ struct sock_connect_state *state =
+ talloc_get_type(c->private_data,
+ struct sock_connect_state);
+ *result = talloc_steal(mem_ctx, state->result);
+ }
talloc_free(c);
return status;
}
@@ -237,17 +161,16 @@ NTSTATUS smbcli_sock_connect_recv(struct composite_context *c)
sync version of the function
*/
-NTSTATUS smbcli_sock_connect(struct smbcli_socket *sock, const char *host_addr, int port,
- const char *host_name)
+NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
+ const char *host_addr, int port,
+ const char *host_name,
+ struct event_context *event_ctx,
+ struct smbcli_socket **result)
{
- struct composite_context *c;
-
- c = smbcli_sock_connect_send(sock, host_addr, port, host_name);
- if (c == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
-
- return smbcli_sock_connect_recv(c);
+ struct composite_context *c =
+ smbcli_sock_connect_send(mem_ctx, host_addr, port, host_name,
+ event_ctx);
+ return smbcli_sock_connect_recv(c, mem_ctx, result);
}
@@ -306,15 +229,39 @@ NTSTATUS smbcli_sock_read(struct smbcli_socket *sock, uint8_t *data,
/****************************************************************************
resolve a hostname and connect
****************************************************************************/
-BOOL smbcli_sock_connect_byname(struct smbcli_socket *sock, const char *host, int port)
+struct smbcli_socket *smbcli_sock_connect_byname(const char *host, int port,
+ TALLOC_CTX *mem_ctx,
+ struct event_context *event_ctx)
{
int name_type = NBT_NAME_SERVER;
const char *address;
NTSTATUS status;
struct nbt_name nbt_name;
char *name, *p;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct smbcli_socket *result;
+
+ if (tmp_ctx == NULL) {
+ DEBUG(0, ("talloc_new failed\n"));
+ return NULL;
+ }
+
+ name = talloc_strdup(tmp_ctx, host);
+ if (name == NULL) {
+ DEBUG(0, ("talloc_strdup failed\n"));
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
+
+ if (event_ctx == NULL) {
+ event_ctx = event_context_init(mem_ctx);
+ }
- name = talloc_strdup(sock, host);
+ if (event_ctx == NULL) {
+ DEBUG(0, ("event_context_init failed\n"));
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
/* allow hostnames of the form NAME#xx and do a netbios lookup */
if ((p = strchr(name, '#'))) {
@@ -322,16 +269,25 @@ BOOL smbcli_sock_connect_byname(struct smbcli_socket *sock, const char *host, in
*p = 0;
}
- nbt_name.name = name;
- nbt_name.type = name_type;
- nbt_name.scope = NULL;
+ make_nbt_name(&nbt_name, host, name_type);
- status = resolve_name(&nbt_name, sock, &address, sock->event.ctx);
+ status = resolve_name(&nbt_name, tmp_ctx, &address, event_ctx);
if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
return False;
}
- status = smbcli_sock_connect(sock, address, port, name);
+ status = smbcli_sock_connect(mem_ctx, address, port, name, event_ctx,
+ &result);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(9, ("smbcli_sock_connect failed: %s\n",
+ nt_errstr(status)));
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
+
+ talloc_free(tmp_ctx);
- return NT_STATUS_IS_OK(status);
+ return result;
}