--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/smb.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,1000 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2014, Bill Nagel <wnagel@tycoint.com>, Exacq Technologies
+ * Copyright (C) 2016-2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if !defined(CURL_DISABLE_SMB) && defined(USE_NTLM) &&  \
+  (CURL_SIZEOF_CURL_OFF_T > 4)
+
+#if !defined(USE_WINDOWS_SSPI) || defined(USE_WIN32_CRYPTO)
+
+#define BUILDING_CURL_SMB_C
+
+#ifdef HAVE_PROCESS_H
+#include <process.h>
+#ifdef CURL_WINDOWS_APP
+#define getpid GetCurrentProcessId
+#elif !defined(MSDOS)
+#define getpid _getpid
+#endif
+#endif
+
+#include "smb.h"
+#include "urldata.h"
+#include "sendf.h"
+#include "multiif.h"
+#include "connect.h"
+#include "progress.h"
+#include "transfer.h"
+#include "vtls/vtls.h"
+#include "curl_ntlm_core.h"
+#include "escape.h"
+#include "curl_endian.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/* Local API functions */
+static CURLcode smb_setup_connection(struct connectdata *conn);
+static CURLcode smb_connect(struct connectdata *conn, bool *done);
+static CURLcode smb_connection_state(struct connectdata *conn, bool *done);
+static CURLcode smb_do(struct connectdata *conn, bool *done);
+static CURLcode smb_request_state(struct connectdata *conn, bool *done);
+static CURLcode smb_done(struct connectdata *conn, CURLcode status,
+                         bool premature);
+static CURLcode smb_disconnect(struct connectdata *conn, bool dead);
+static int smb_getsock(struct connectdata *conn, curl_socket_t *socks);
+static CURLcode smb_parse_url_path(struct connectdata *conn);
+
+/*
+ * SMB handler interface
+ */
+const struct Curl_handler Curl_handler_smb = {
+  "SMB",                                /* scheme */
+  smb_setup_connection,                 /* setup_connection */
+  smb_do,                               /* do_it */
+  smb_done,                             /* done */
+  ZERO_NULL,                            /* do_more */
+  smb_connect,                          /* connect_it */
+  smb_connection_state,                 /* connecting */
+  smb_request_state,                    /* doing */
+  smb_getsock,                          /* proto_getsock */
+  smb_getsock,                          /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  ZERO_NULL,                            /* perform_getsock */
+  smb_disconnect,                       /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  ZERO_NULL,                            /* connection_check */
+  PORT_SMB,                             /* defport */
+  CURLPROTO_SMB,                        /* protocol */
+  PROTOPT_NONE                          /* flags */
+};
+
+#ifdef USE_SSL
+/*
+ * SMBS handler interface
+ */
+const struct Curl_handler Curl_handler_smbs = {
+  "SMBS",                               /* scheme */
+  smb_setup_connection,                 /* setup_connection */
+  smb_do,                               /* do_it */
+  smb_done,                             /* done */
+  ZERO_NULL,                            /* do_more */
+  smb_connect,                          /* connect_it */
+  smb_connection_state,                 /* connecting */
+  smb_request_state,                    /* doing */
+  smb_getsock,                          /* proto_getsock */
+  smb_getsock,                          /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  ZERO_NULL,                            /* perform_getsock */
+  smb_disconnect,                       /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  ZERO_NULL,                            /* connection_check */
+  PORT_SMBS,                            /* defport */
+  CURLPROTO_SMBS,                       /* protocol */
+  PROTOPT_SSL                           /* flags */
+};
+#endif
+
+#define MAX_PAYLOAD_SIZE  0x8000
+#define MAX_MESSAGE_SIZE  (MAX_PAYLOAD_SIZE + 0x1000)
+#define CLIENTNAME        "curl"
+#define SERVICENAME       "?????"
+
+/* Append a string to an SMB message */
+#define MSGCAT(str)                             \
+  strcpy(p, (str));                             \
+  p += strlen(str);
+
+/* Append a null-terminated string to an SMB message */
+#define MSGCATNULL(str)                         \
+  strcpy(p, (str));                             \
+  p += strlen(str) + 1;
+
+/* SMB is mostly little endian */
+#if (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || \
+  defined(__OS400__)
+static unsigned short smb_swap16(unsigned short x)
+{
+  return (unsigned short) ((x << 8) | ((x >> 8) & 0xff));
+}
+
+static unsigned int smb_swap32(unsigned int x)
+{
+  return (x << 24) | ((x << 8) & 0xff0000) | ((x >> 8) & 0xff00) |
+    ((x >> 24) & 0xff);
+}
+
+static curl_off_t smb_swap64(curl_off_t x)
+{
+  return ((curl_off_t) smb_swap32((unsigned int) x) << 32) |
+    smb_swap32((unsigned int) (x >> 32));
+}
+
+#else
+#  define smb_swap16(x) (x)
+#  define smb_swap32(x) (x)
+#  define smb_swap64(x) (x)
+#endif
+
+/* SMB request state */
+enum smb_req_state {
+  SMB_REQUESTING,
+  SMB_TREE_CONNECT,
+  SMB_OPEN,
+  SMB_DOWNLOAD,
+  SMB_UPLOAD,
+  SMB_CLOSE,
+  SMB_TREE_DISCONNECT,
+  SMB_DONE
+};
+
+/* SMB request data */
+struct smb_request {
+  enum smb_req_state state;
+  char *path;
+  unsigned short tid; /* Even if we connect to the same tree as another */
+  unsigned short fid; /* request, the tid will be different */
+  CURLcode result;
+};
+
+static void conn_state(struct connectdata *conn, enum smb_conn_state newstate)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+  /* For debug purposes */
+  static const char * const names[] = {
+    "SMB_NOT_CONNECTED",
+    "SMB_CONNECTING",
+    "SMB_NEGOTIATE",
+    "SMB_SETUP",
+    "SMB_CONNECTED",
+    /* LAST */
+  };
+
+  if(smbc->state != newstate)
+    infof(conn->data, "SMB conn %p state change from %s to %s\n",
+          (void *)smbc, names[smbc->state], names[newstate]);
+#endif
+
+  smbc->state = newstate;
+}
+
+static void request_state(struct connectdata *conn,
+                          enum smb_req_state newstate)
+{
+  struct smb_request *req = conn->data->req.protop;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+  /* For debug purposes */
+  static const char * const names[] = {
+    "SMB_REQUESTING",
+    "SMB_TREE_CONNECT",
+    "SMB_OPEN",
+    "SMB_DOWNLOAD",
+    "SMB_UPLOAD",
+    "SMB_CLOSE",
+    "SMB_TREE_DISCONNECT",
+    "SMB_DONE",
+    /* LAST */
+  };
+
+  if(req->state != newstate)
+    infof(conn->data, "SMB request %p state change from %s to %s\n",
+          (void *)req, names[req->state], names[newstate]);
+#endif
+
+  req->state = newstate;
+}
+
+/* this should setup things in the connection, not in the easy
+   handle */
+static CURLcode smb_setup_connection(struct connectdata *conn)
+{
+  struct smb_request *req;
+
+  /* Initialize the request state */
+  conn->data->req.protop = req = calloc(1, sizeof(struct smb_request));
+  if(!req)
+    return CURLE_OUT_OF_MEMORY;
+
+  /* Parse the URL path */
+  return smb_parse_url_path(conn);
+}
+
+static CURLcode smb_connect(struct connectdata *conn, bool *done)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  char *slash;
+
+  (void) done;
+
+  /* Check we have a username and password to authenticate with */
+  if(!conn->bits.user_passwd)
+    return CURLE_LOGIN_DENIED;
+
+  /* Initialize the connection state */
+  smbc->state = SMB_CONNECTING;
+  smbc->recv_buf = malloc(MAX_MESSAGE_SIZE);
+  if(!smbc->recv_buf)
+    return CURLE_OUT_OF_MEMORY;
+
+  /* Multiple requests are allowed with this connection */
+  connkeep(conn, "SMB default");
+
+  /* Parse the username, domain, and password */
+  slash = strchr(conn->user, '/');
+  if(!slash)
+    slash = strchr(conn->user, '\\');
+
+  if(slash) {
+    smbc->user = slash + 1;
+    smbc->domain = strdup(conn->user);
+    if(!smbc->domain)
+      return CURLE_OUT_OF_MEMORY;
+    smbc->domain[slash - conn->user] = 0;
+  }
+  else {
+    smbc->user = conn->user;
+    smbc->domain = strdup(conn->host.name);
+    if(!smbc->domain)
+      return CURLE_OUT_OF_MEMORY;
+  }
+
+  return CURLE_OK;
+}
+
+static CURLcode smb_recv_message(struct connectdata *conn, void **msg)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  char *buf = smbc->recv_buf;
+  ssize_t bytes_read;
+  size_t nbt_size;
+  size_t msg_size;
+  size_t len = MAX_MESSAGE_SIZE - smbc->got;
+  CURLcode result;
+
+  result = Curl_read(conn, FIRSTSOCKET, buf + smbc->got, len, &bytes_read);
+  if(result)
+    return result;
+
+  if(!bytes_read)
+    return CURLE_OK;
+
+  smbc->got += bytes_read;
+
+  /* Check for a 32-bit nbt header */
+  if(smbc->got < sizeof(unsigned int))
+    return CURLE_OK;
+
+  nbt_size = Curl_read16_be((const unsigned char *)
+                            (buf + sizeof(unsigned short))) +
+    sizeof(unsigned int);
+  if(smbc->got < nbt_size)
+    return CURLE_OK;
+
+  msg_size = sizeof(struct smb_header);
+  if(nbt_size >= msg_size + 1) {
+    /* Add the word count */
+    msg_size += 1 + ((unsigned char) buf[msg_size]) * sizeof(unsigned short);
+    if(nbt_size >= msg_size + sizeof(unsigned short)) {
+      /* Add the byte count */
+      msg_size += sizeof(unsigned short) +
+        Curl_read16_le((const unsigned char *)&buf[msg_size]);
+      if(nbt_size < msg_size)
+        return CURLE_READ_ERROR;
+    }
+  }
+
+  *msg = buf;
+
+  return CURLE_OK;
+}
+
+static void smb_pop_message(struct connectdata *conn)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+
+  smbc->got = 0;
+}
+
+static void smb_format_message(struct connectdata *conn, struct smb_header *h,
+                               unsigned char cmd, size_t len)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  struct smb_request *req = conn->data->req.protop;
+  unsigned int pid;
+
+  memset(h, 0, sizeof(*h));
+  h->nbt_length = htons((unsigned short) (sizeof(*h) - sizeof(unsigned int) +
+                                          len));
+  memcpy((char *)h->magic, "\xffSMB", 4);
+  h->command = cmd;
+  h->flags = SMB_FLAGS_CANONICAL_PATHNAMES | SMB_FLAGS_CASELESS_PATHNAMES;
+  h->flags2 = smb_swap16(SMB_FLAGS2_IS_LONG_NAME | SMB_FLAGS2_KNOWS_LONG_NAME);
+  h->uid = smb_swap16(smbc->uid);
+  h->tid = smb_swap16(req->tid);
+  pid = getpid();
+  h->pid_high = smb_swap16((unsigned short)(pid >> 16));
+  h->pid = smb_swap16((unsigned short) pid);
+}
+
+static CURLcode smb_send(struct connectdata *conn, ssize_t len,
+                         size_t upload_size)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  ssize_t bytes_written;
+  CURLcode result;
+
+  result = Curl_write(conn, FIRSTSOCKET, conn->data->state.ulbuf,
+                      len, &bytes_written);
+  if(result)
+    return result;
+
+  if(bytes_written != len) {
+    smbc->send_size = len;
+    smbc->sent = bytes_written;
+  }
+
+  smbc->upload_size = upload_size;
+
+  return CURLE_OK;
+}
+
+static CURLcode smb_flush(struct connectdata *conn)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  ssize_t bytes_written;
+  ssize_t len = smbc->send_size - smbc->sent;
+  CURLcode result;
+
+  if(!smbc->send_size)
+    return CURLE_OK;
+
+  result = Curl_write(conn, FIRSTSOCKET,
+                      conn->data->state.ulbuf + smbc->sent,
+                      len, &bytes_written);
+  if(result)
+    return result;
+
+  if(bytes_written != len)
+    smbc->sent += bytes_written;
+  else
+    smbc->send_size = 0;
+
+  return CURLE_OK;
+}
+
+static CURLcode smb_send_message(struct connectdata *conn, unsigned char cmd,
+                                 const void *msg, size_t msg_len)
+{
+  CURLcode result = Curl_get_upload_buffer(conn->data);
+  if(result)
+    return result;
+  smb_format_message(conn, (struct smb_header *)conn->data->state.ulbuf,
+                     cmd, msg_len);
+  memcpy(conn->data->state.ulbuf + sizeof(struct smb_header),
+         msg, msg_len);
+
+  return smb_send(conn, sizeof(struct smb_header) + msg_len, 0);
+}
+
+static CURLcode smb_send_negotiate(struct connectdata *conn)
+{
+  const char *msg = "\x00\x0c\x00\x02NT LM 0.12";
+
+  return smb_send_message(conn, SMB_COM_NEGOTIATE, msg, 15);
+}
+
+static CURLcode smb_send_setup(struct connectdata *conn)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  struct smb_setup msg;
+  char *p = msg.bytes;
+  unsigned char lm_hash[21];
+  unsigned char lm[24];
+  unsigned char nt_hash[21];
+  unsigned char nt[24];
+
+  size_t byte_count = sizeof(lm) + sizeof(nt);
+  byte_count += strlen(smbc->user) + strlen(smbc->domain);
+  byte_count += strlen(OS) + strlen(CLIENTNAME) + 4; /* 4 null chars */
+  if(byte_count > sizeof(msg.bytes))
+    return CURLE_FILESIZE_EXCEEDED;
+
+  Curl_ntlm_core_mk_lm_hash(conn->data, conn->passwd, lm_hash);
+  Curl_ntlm_core_lm_resp(lm_hash, smbc->challenge, lm);
+#ifdef USE_NTRESPONSES
+  Curl_ntlm_core_mk_nt_hash(conn->data, conn->passwd, nt_hash);
+  Curl_ntlm_core_lm_resp(nt_hash, smbc->challenge, nt);
+#else
+  memset(nt, 0, sizeof(nt));
+#endif
+
+  memset(&msg, 0, sizeof(msg));
+  msg.word_count = SMB_WC_SETUP_ANDX;
+  msg.andx.command = SMB_COM_NO_ANDX_COMMAND;
+  msg.max_buffer_size = smb_swap16(MAX_MESSAGE_SIZE);
+  msg.max_mpx_count = smb_swap16(1);
+  msg.vc_number = smb_swap16(1);
+  msg.session_key = smb_swap32(smbc->session_key);
+  msg.capabilities = smb_swap32(SMB_CAP_LARGE_FILES);
+  msg.lengths[0] = smb_swap16(sizeof(lm));
+  msg.lengths[1] = smb_swap16(sizeof(nt));
+  memcpy(p, lm, sizeof(lm));
+  p += sizeof(lm);
+  memcpy(p, nt, sizeof(nt));
+  p += sizeof(nt);
+  MSGCATNULL(smbc->user);
+  MSGCATNULL(smbc->domain);
+  MSGCATNULL(OS);
+  MSGCATNULL(CLIENTNAME);
+  byte_count = p - msg.bytes;
+  msg.byte_count = smb_swap16((unsigned short)byte_count);
+
+  return smb_send_message(conn, SMB_COM_SETUP_ANDX, &msg,
+                          sizeof(msg) - sizeof(msg.bytes) + byte_count);
+}
+
+static CURLcode smb_send_tree_connect(struct connectdata *conn)
+{
+  struct smb_tree_connect msg;
+  struct smb_conn *smbc = &conn->proto.smbc;
+  char *p = msg.bytes;
+
+  size_t byte_count = strlen(conn->host.name) + strlen(smbc->share);
+  byte_count += strlen(SERVICENAME) + 5; /* 2 nulls and 3 backslashes */
+  if(byte_count > sizeof(msg.bytes))
+    return CURLE_FILESIZE_EXCEEDED;
+
+  memset(&msg, 0, sizeof(msg));
+  msg.word_count = SMB_WC_TREE_CONNECT_ANDX;
+  msg.andx.command = SMB_COM_NO_ANDX_COMMAND;
+  msg.pw_len = 0;
+  MSGCAT("\\\\");
+  MSGCAT(conn->host.name);
+  MSGCAT("\\");
+  MSGCATNULL(smbc->share);
+  MSGCATNULL(SERVICENAME); /* Match any type of service */
+  byte_count = p - msg.bytes;
+  msg.byte_count = smb_swap16((unsigned short)byte_count);
+
+  return smb_send_message(conn, SMB_COM_TREE_CONNECT_ANDX, &msg,
+                          sizeof(msg) - sizeof(msg.bytes) + byte_count);
+}
+
+static CURLcode smb_send_open(struct connectdata *conn)
+{
+  struct smb_request *req = conn->data->req.protop;
+  struct smb_nt_create msg;
+  size_t byte_count;
+
+  if((strlen(req->path) + 1) > sizeof(msg.bytes))
+    return CURLE_FILESIZE_EXCEEDED;
+
+  memset(&msg, 0, sizeof(msg));
+  msg.word_count = SMB_WC_NT_CREATE_ANDX;
+  msg.andx.command = SMB_COM_NO_ANDX_COMMAND;
+  byte_count = strlen(req->path);
+  msg.name_length = smb_swap16((unsigned short)byte_count);
+  msg.share_access = smb_swap32(SMB_FILE_SHARE_ALL);
+  if(conn->data->set.upload) {
+    msg.access = smb_swap32(SMB_GENERIC_READ | SMB_GENERIC_WRITE);
+    msg.create_disposition = smb_swap32(SMB_FILE_OVERWRITE_IF);
+  }
+  else {
+    msg.access = smb_swap32(SMB_GENERIC_READ);
+    msg.create_disposition = smb_swap32(SMB_FILE_OPEN);
+  }
+  msg.byte_count = smb_swap16((unsigned short) ++byte_count);
+  strcpy(msg.bytes, req->path);
+
+  return smb_send_message(conn, SMB_COM_NT_CREATE_ANDX, &msg,
+                          sizeof(msg) - sizeof(msg.bytes) + byte_count);
+}
+
+static CURLcode smb_send_close(struct connectdata *conn)
+{
+  struct smb_request *req = conn->data->req.protop;
+  struct smb_close msg;
+
+  memset(&msg, 0, sizeof(msg));
+  msg.word_count = SMB_WC_CLOSE;
+  msg.fid = smb_swap16(req->fid);
+
+  return smb_send_message(conn, SMB_COM_CLOSE, &msg, sizeof(msg));
+}
+
+static CURLcode smb_send_tree_disconnect(struct connectdata *conn)
+{
+  struct smb_tree_disconnect msg;
+
+  memset(&msg, 0, sizeof(msg));
+
+  return smb_send_message(conn, SMB_COM_TREE_DISCONNECT, &msg, sizeof(msg));
+}
+
+static CURLcode smb_send_read(struct connectdata *conn)
+{
+  struct smb_request *req = conn->data->req.protop;
+  curl_off_t offset = conn->data->req.offset;
+  struct smb_read msg;
+
+  memset(&msg, 0, sizeof(msg));
+  msg.word_count = SMB_WC_READ_ANDX;
+  msg.andx.command = SMB_COM_NO_ANDX_COMMAND;
+  msg.fid = smb_swap16(req->fid);
+  msg.offset = smb_swap32((unsigned int) offset);
+  msg.offset_high = smb_swap32((unsigned int) (offset >> 32));
+  msg.min_bytes = smb_swap16(MAX_PAYLOAD_SIZE);
+  msg.max_bytes = smb_swap16(MAX_PAYLOAD_SIZE);
+
+  return smb_send_message(conn, SMB_COM_READ_ANDX, &msg, sizeof(msg));
+}
+
+static CURLcode smb_send_write(struct connectdata *conn)
+{
+  struct smb_write *msg;
+  struct smb_request *req = conn->data->req.protop;
+  curl_off_t offset = conn->data->req.offset;
+  curl_off_t upload_size = conn->data->req.size - conn->data->req.bytecount;
+  CURLcode result = Curl_get_upload_buffer(conn->data);
+  if(result)
+    return result;
+  msg = (struct smb_write *)conn->data->state.ulbuf;
+
+  if(upload_size >= MAX_PAYLOAD_SIZE - 1) /* There is one byte of padding */
+    upload_size = MAX_PAYLOAD_SIZE - 1;
+
+  memset(msg, 0, sizeof(*msg));
+  msg->word_count = SMB_WC_WRITE_ANDX;
+  msg->andx.command = SMB_COM_NO_ANDX_COMMAND;
+  msg->fid = smb_swap16(req->fid);
+  msg->offset = smb_swap32((unsigned int) offset);
+  msg->offset_high = smb_swap32((unsigned int) (offset >> 32));
+  msg->data_length = smb_swap16((unsigned short) upload_size);
+  msg->data_offset = smb_swap16(sizeof(*msg) - sizeof(unsigned int));
+  msg->byte_count = smb_swap16((unsigned short) (upload_size + 1));
+
+  smb_format_message(conn, &msg->h, SMB_COM_WRITE_ANDX,
+                     sizeof(*msg) - sizeof(msg->h) + (size_t) upload_size);
+
+  return smb_send(conn, sizeof(*msg), (size_t) upload_size);
+}
+
+static CURLcode smb_send_and_recv(struct connectdata *conn, void **msg)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  CURLcode result;
+  *msg = NULL; /* if it returns early */
+
+  /* Check if there is data in the transfer buffer */
+  if(!smbc->send_size && smbc->upload_size) {
+    size_t nread = smbc->upload_size > conn->data->set.upload_buffer_size ?
+      conn->data->set.upload_buffer_size :
+      smbc->upload_size;
+    conn->data->req.upload_fromhere = conn->data->state.ulbuf;
+    result = Curl_fillreadbuffer(conn, nread, &nread);
+    if(result && result != CURLE_AGAIN)
+      return result;
+    if(!nread)
+      return CURLE_OK;
+
+    smbc->upload_size -= nread;
+    smbc->send_size = nread;
+    smbc->sent = 0;
+  }
+
+  /* Check if there is data to send */
+  if(smbc->send_size) {
+    result = smb_flush(conn);
+    if(result)
+      return result;
+  }
+
+  /* Check if there is still data to be sent */
+  if(smbc->send_size || smbc->upload_size)
+    return CURLE_AGAIN;
+
+  return smb_recv_message(conn, msg);
+}
+
+static CURLcode smb_connection_state(struct connectdata *conn, bool *done)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  struct smb_negotiate_response *nrsp;
+  struct smb_header *h;
+  CURLcode result;
+  void *msg = NULL;
+
+  if(smbc->state == SMB_CONNECTING) {
+#ifdef USE_SSL
+    if((conn->handler->flags & PROTOPT_SSL)) {
+      bool ssl_done = FALSE;
+      result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &ssl_done);
+      if(result && result != CURLE_AGAIN)
+        return result;
+      if(!ssl_done)
+        return CURLE_OK;
+    }
+#endif
+
+    result = smb_send_negotiate(conn);
+    if(result) {
+      connclose(conn, "SMB: failed to send negotiate message");
+      return result;
+    }
+
+    conn_state(conn, SMB_NEGOTIATE);
+  }
+
+  /* Send the previous message and check for a response */
+  result = smb_send_and_recv(conn, &msg);
+  if(result && result != CURLE_AGAIN) {
+    connclose(conn, "SMB: failed to communicate");
+    return result;
+  }
+
+  if(!msg)
+    return CURLE_OK;
+
+  h = msg;
+
+  switch(smbc->state) {
+  case SMB_NEGOTIATE:
+    if(h->status || smbc->got < sizeof(*nrsp) + sizeof(smbc->challenge) - 1) {
+      connclose(conn, "SMB: negotiation failed");
+      return CURLE_COULDNT_CONNECT;
+    }
+    nrsp = msg;
+    memcpy(smbc->challenge, nrsp->bytes, sizeof(smbc->challenge));
+    smbc->session_key = smb_swap32(nrsp->session_key);
+    result = smb_send_setup(conn);
+    if(result) {
+      connclose(conn, "SMB: failed to send setup message");
+      return result;
+    }
+    conn_state(conn, SMB_SETUP);
+    break;
+
+  case SMB_SETUP:
+    if(h->status) {
+      connclose(conn, "SMB: authentication failed");
+      return CURLE_LOGIN_DENIED;
+    }
+    smbc->uid = smb_swap16(h->uid);
+    conn_state(conn, SMB_CONNECTED);
+    *done = true;
+    break;
+
+  default:
+    smb_pop_message(conn);
+    return CURLE_OK; /* ignore */
+  }
+
+  smb_pop_message(conn);
+
+  return CURLE_OK;
+}
+
+/*
+ * Convert a timestamp from the Windows world (100 nsec units from 1 Jan 1601)
+ * to Posix time. Cap the output to fit within a time_t.
+ */
+static void get_posix_time(time_t *out, curl_off_t timestamp)
+{
+  timestamp -= 116444736000000000;
+  timestamp /= 10000000;
+#if SIZEOF_TIME_T < SIZEOF_CURL_OFF_T
+  if(timestamp > TIME_T_MAX)
+    *out = TIME_T_MAX;
+  else if(timestamp < TIME_T_MIN)
+    *out = TIME_T_MIN;
+  else
+#endif
+    *out = (time_t) timestamp;
+}
+
+static CURLcode smb_request_state(struct connectdata *conn, bool *done)
+{
+  struct smb_request *req = conn->data->req.protop;
+  struct smb_header *h;
+  struct smb_conn *smbc = &conn->proto.smbc;
+  enum smb_req_state next_state = SMB_DONE;
+  unsigned short len;
+  unsigned short off;
+  CURLcode result;
+  void *msg = NULL;
+  const struct smb_nt_create_response *smb_m;
+
+  /* Start the request */
+  if(req->state == SMB_REQUESTING) {
+    result = smb_send_tree_connect(conn);
+    if(result) {
+      connclose(conn, "SMB: failed to send tree connect message");
+      return result;
+    }
+
+    request_state(conn, SMB_TREE_CONNECT);
+  }
+
+  /* Send the previous message and check for a response */
+  result = smb_send_and_recv(conn, &msg);
+  if(result && result != CURLE_AGAIN) {
+    connclose(conn, "SMB: failed to communicate");
+    return result;
+  }
+
+  if(!msg)
+    return CURLE_OK;
+
+  h = msg;
+
+  switch(req->state) {
+  case SMB_TREE_CONNECT:
+    if(h->status) {
+      req->result = CURLE_REMOTE_FILE_NOT_FOUND;
+      if(h->status == smb_swap32(SMB_ERR_NOACCESS))
+        req->result = CURLE_REMOTE_ACCESS_DENIED;
+      break;
+    }
+    req->tid = smb_swap16(h->tid);
+    next_state = SMB_OPEN;
+    break;
+
+  case SMB_OPEN:
+    if(h->status || smbc->got < sizeof(struct smb_nt_create_response)) {
+      req->result = CURLE_REMOTE_FILE_NOT_FOUND;
+      if(h->status == smb_swap32(SMB_ERR_NOACCESS))
+        req->result = CURLE_REMOTE_ACCESS_DENIED;
+      next_state = SMB_TREE_DISCONNECT;
+      break;
+    }
+    smb_m = (const struct smb_nt_create_response*) msg;
+    req->fid = smb_swap16(smb_m->fid);
+    conn->data->req.offset = 0;
+    if(conn->data->set.upload) {
+      conn->data->req.size = conn->data->state.infilesize;
+      Curl_pgrsSetUploadSize(conn->data, conn->data->req.size);
+      next_state = SMB_UPLOAD;
+    }
+    else {
+      smb_m = (const struct smb_nt_create_response*) msg;
+      conn->data->req.size = smb_swap64(smb_m->end_of_file);
+      if(conn->data->req.size < 0) {
+        req->result = CURLE_WEIRD_SERVER_REPLY;
+        next_state = SMB_CLOSE;
+      }
+      else {
+        Curl_pgrsSetDownloadSize(conn->data, conn->data->req.size);
+        if(conn->data->set.get_filetime)
+          get_posix_time(&conn->data->info.filetime, smb_m->last_change_time);
+        next_state = SMB_DOWNLOAD;
+      }
+    }
+    break;
+
+  case SMB_DOWNLOAD:
+    if(h->status || smbc->got < sizeof(struct smb_header) + 14) {
+      req->result = CURLE_RECV_ERROR;
+      next_state = SMB_CLOSE;
+      break;
+    }
+    len = Curl_read16_le(((const unsigned char *) msg) +
+                         sizeof(struct smb_header) + 11);
+    off = Curl_read16_le(((const unsigned char *) msg) +
+                         sizeof(struct smb_header) + 13);
+    if(len > 0) {
+      if(off + sizeof(unsigned int) + len > smbc->got) {
+        failf(conn->data, "Invalid input packet");
+        result = CURLE_RECV_ERROR;
+      }
+      else
+        result = Curl_client_write(conn, CLIENTWRITE_BODY,
+                                   (char *)msg + off + sizeof(unsigned int),
+                                   len);
+      if(result) {
+        req->result = result;
+        next_state = SMB_CLOSE;
+        break;
+      }
+    }
+    conn->data->req.bytecount += len;
+    conn->data->req.offset += len;
+    Curl_pgrsSetDownloadCounter(conn->data, conn->data->req.bytecount);
+    next_state = (len < MAX_PAYLOAD_SIZE) ? SMB_CLOSE : SMB_DOWNLOAD;
+    break;
+
+  case SMB_UPLOAD:
+    if(h->status || smbc->got < sizeof(struct smb_header) + 6) {
+      req->result = CURLE_UPLOAD_FAILED;
+      next_state = SMB_CLOSE;
+      break;
+    }
+    len = Curl_read16_le(((const unsigned char *) msg) +
+                         sizeof(struct smb_header) + 5);
+    conn->data->req.bytecount += len;
+    conn->data->req.offset += len;
+    Curl_pgrsSetUploadCounter(conn->data, conn->data->req.bytecount);
+    if(conn->data->req.bytecount >= conn->data->req.size)
+      next_state = SMB_CLOSE;
+    else
+      next_state = SMB_UPLOAD;
+    break;
+
+  case SMB_CLOSE:
+    /* We don't care if the close failed, proceed to tree disconnect anyway */
+    next_state = SMB_TREE_DISCONNECT;
+    break;
+
+  case SMB_TREE_DISCONNECT:
+    next_state = SMB_DONE;
+    break;
+
+  default:
+    smb_pop_message(conn);
+    return CURLE_OK; /* ignore */
+  }
+
+  smb_pop_message(conn);
+
+  switch(next_state) {
+  case SMB_OPEN:
+    result = smb_send_open(conn);
+    break;
+
+  case SMB_DOWNLOAD:
+    result = smb_send_read(conn);
+    break;
+
+  case SMB_UPLOAD:
+    result = smb_send_write(conn);
+    break;
+
+  case SMB_CLOSE:
+    result = smb_send_close(conn);
+    break;
+
+  case SMB_TREE_DISCONNECT:
+    result = smb_send_tree_disconnect(conn);
+    break;
+
+  case SMB_DONE:
+    result = req->result;
+    *done = true;
+    break;
+
+  default:
+    break;
+  }
+
+  if(result) {
+    connclose(conn, "SMB: failed to send message");
+    return result;
+  }
+
+  request_state(conn, next_state);
+
+  return CURLE_OK;
+}
+
+static CURLcode smb_done(struct connectdata *conn, CURLcode status,
+                         bool premature)
+{
+  (void) premature;
+  Curl_safefree(conn->data->req.protop);
+  return status;
+}
+
+static CURLcode smb_disconnect(struct connectdata *conn, bool dead)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+  (void) dead;
+  Curl_safefree(smbc->share);
+  Curl_safefree(smbc->domain);
+  Curl_safefree(smbc->recv_buf);
+  return CURLE_OK;
+}
+
+static int smb_getsock(struct connectdata *conn, curl_socket_t *socks)
+{
+  socks[0] = conn->sock[FIRSTSOCKET];
+  return GETSOCK_READSOCK(0) | GETSOCK_WRITESOCK(0);
+}
+
+static CURLcode smb_do(struct connectdata *conn, bool *done)
+{
+  struct smb_conn *smbc = &conn->proto.smbc;
+
+  *done = FALSE;
+  if(smbc->share) {
+    return CURLE_OK;
+  }
+  return CURLE_URL_MALFORMAT;
+}
+
+static CURLcode smb_parse_url_path(struct connectdata *conn)
+{
+  struct Curl_easy *data = conn->data;
+  struct smb_request *req = data->req.protop;
+  struct smb_conn *smbc = &conn->proto.smbc;
+  char *path;
+  char *slash;
+
+  /* URL decode the path */
+  CURLcode result = Curl_urldecode(data, data->state.up.path, 0, &path, NULL,
+                                   TRUE);
+  if(result)
+    return result;
+
+  /* Parse the path for the share */
+  smbc->share = strdup((*path == '/' || *path == '\\') ? path + 1 : path);
+  free(path);
+  if(!smbc->share)
+    return CURLE_OUT_OF_MEMORY;
+
+  slash = strchr(smbc->share, '/');
+  if(!slash)
+    slash = strchr(smbc->share, '\\');
+
+  /* The share must be present */
+  if(!slash) {
+    Curl_safefree(smbc->share);
+    return CURLE_URL_MALFORMAT;
+  }
+
+  /* Parse the path for the file path converting any forward slashes into
+     backslashes */
+  *slash++ = 0;
+  req->path = slash;
+
+  for(; *slash; slash++) {
+    if(*slash == '/')
+      *slash = '\\';
+  }
+  return CURLE_OK;
+}
+
+#endif /* !USE_WINDOWS_SSPI || USE_WIN32_CRYPTO */
+
+#endif /* CURL_DISABLE_SMB && USE_NTLM && CURL_SIZEOF_CURL_OFF_T > 4 */