/* Unix SMB/CIFS implementation. SMB client socket context management functions Copyright (C) Andrew Tridgell 1994-2005 Copyright (C) James Myers 2003 <myersjj@samba.org> 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 (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "includes.h" #include "lib/events/events.h" #include "libcli/raw/libcliraw.h" #include "libcli/composite/composite.h" #include "lib/socket/socket.h" #include "libcli/resolve/resolve.h" struct sock_connect_state { struct composite_context *ctx; const char *host_name; int num_ports; uint16_t *ports; struct smbcli_socket *result; }; /* connect a smbcli_socket context to an IP/port pair if port is 0 then choose 445 then 139 */ 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 composite_context *result, *ctx; struct sock_connect_state *state; result = talloc_zero(mem_ctx, struct composite_context); if (result == NULL) goto failed; result->state = COMPOSITE_STATE_IN_PROGRESS; if (event_ctx != NULL) { result->event_ctx = talloc_reference(result, event_ctx); } else { result->event_ctx = event_context_init(result); } if (result->event_ctx == NULL) goto failed; state = talloc(result, struct sock_connect_state); if (state == NULL) goto failed; state->ctx = result; result->private_data = state; state->host_name = talloc_strdup(state, host_name); if (state->host_name == NULL) goto failed; if (port == 0) { const char **ports = lp_smb_ports(); int i; 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; } 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; failed: talloc_free(result); return NULL; } static void smbcli_sock_connect_recv_conn(struct composite_context *ctx) { struct sock_connect_state *state = talloc_get_type(ctx->async.private_data, struct sock_connect_state); struct socket_context *sock; uint16_t port; state->ctx->status = socket_connect_multi_recv(ctx, state, &sock, &port); if (!composite_is_ok(state->ctx)) return; state->ctx->status = socket_set_option(sock, lp_socket_options(), NULL); if (!composite_is_ok(state->ctx)) return; state->result = talloc_zero(state, struct smbcli_socket); if (composite_nomem(state->result, state->ctx)) return; state->result->sock = talloc_steal(state->result, sock); state->result->port = port; state->result->hostname = talloc_steal(sock, state->host_name); state->result->event.ctx = talloc_reference(state->result, state->ctx->event_ctx); if (composite_nomem(state->result->event.ctx, state->ctx)) return; composite_done(state->ctx); } /* finish a smbcli_sock_connect_send() operation */ NTSTATUS smbcli_sock_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx, struct smbcli_socket **result) { 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; } /* connect a smbcli_socket context to an IP/port pair if port is 0 then choose the ports listed in smb.conf (normally 445 then 139) sync version of the function */ 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 = smbcli_sock_connect_send(mem_ctx, host_addr, port, host_name, event_ctx); return smbcli_sock_connect_recv(c, mem_ctx, result); } /**************************************************************************** mark the socket as dead ****************************************************************************/ void smbcli_sock_dead(struct smbcli_socket *sock) { talloc_free(sock->event.fde); sock->event.fde = NULL; talloc_free(sock->sock); sock->sock = NULL; } /**************************************************************************** Set socket options on a open connection. ****************************************************************************/ void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options) { socket_set_option(sock->sock, options, NULL); } /**************************************************************************** resolve a hostname and connect ****************************************************************************/ 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); } 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, '#'))) { name_type = strtol(p+1, NULL, 16); *p = 0; } make_nbt_name(&nbt_name, host, name_type); status = resolve_name(&nbt_name, tmp_ctx, &address, event_ctx); if (!NT_STATUS_IS_OK(status)) { talloc_free(tmp_ctx); return NULL; } 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 result; }