libcli/http/http.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    HTTP library
   5
   6    Copyright (C) 2013 Samuel Cabrero <samuelcabrero@kernevil.me>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "lib/util/tevent_ntstatus.h"
  24 #include "http.h"
  25 #include "http_internal.h"
  26 #include "util/tevent_werror.h"
  27 #include "lib/util/dlinklist.h"
  28
  29 #undef strcasecmp
  30
  31 /**
  32  * Determines if a response should have a body.
  33  * @return 1 if the response MUST have a body; 0 if the response MUST NOT have
  34  *     a body. Returns -1 on error.
  35  */
  36 static int http_response_needs_body(struct http_request *req)
  37 {
  38         struct http_header *h = NULL;
  39
  40         if (!req) return -1;
  41
  42         for (h = req->headers; h != NULL; h = h->next) {
  43                 int cmp;
  44                 int n;
  45                 char c;
  46                 unsigned long long v;
  47
  48                 cmp = strcasecmp(h->key, "Content-Length");
  49                 if (cmp != 0) {
  50                         continue;
  51                 }
  52
  53                 n = sscanf(h->value, "%llu%c", &v, &c);
  54                 if (n != 1) {
  55                         return -1;
  56                 }
  57
  58                 req->remaining_content_length = v;
  59
  60                 if (v != 0) {
  61                         return 1;
  62                 }
  63
  64                 return 0;
  65         }
  66
  67         return 0;
  68 }
  69
  70 struct http_read_response_state {
  71         enum http_parser_state  parser_state;
  72         size_t                  max_headers_size;
  73         uint64_t                max_content_length;
  74         DATA_BLOB               buffer;
  75         struct http_request     *response;
  76 };
  77
  78 /**
  79  * Parses the HTTP headers
  80  */
  81 static enum http_read_status http_parse_headers(struct http_read_response_state *state)
  82 {
  83         enum http_read_status   status = HTTP_ALL_DATA_READ;
  84         char                    *ptr = NULL;
  85         char                    *line = NULL;
  86         char                    *key = NULL;
  87         char                    *value = NULL;
  88         int                     n = 0;
  89         int                     ret;
  90
  91         /* Sanity checks */
  92         if (!state || !state->response) {
  93                 DEBUG(0, ("%s: Invalid Parameter\n", __func__));
  94                 return HTTP_DATA_CORRUPTED;
  95         }
  96
  97         if (state->buffer.length > state->max_headers_size) {
  98                 DEBUG(0, ("%s: Headers too long: %zi, maximum length is %zi\n", __func__,
  99                           state->buffer.length, state->max_headers_size));
 100                 return HTTP_DATA_TOO_LONG;
 101         }
 102
 103         line = talloc_strndup(state, (char *)state->buffer.data, state->buffer.length);
 104         if (!line) {
 105                 DEBUG(0, ("%s: Memory error\n", __func__));
 106                 return HTTP_DATA_CORRUPTED;
 107         }
 108
 109         ptr = strstr(line, "\r\n");
 110         if (ptr == NULL) {
 111                 TALLOC_FREE(line);
 112                 return HTTP_MORE_DATA_EXPECTED;
 113         }
 114
 115         state->response->headers_size += state->buffer.length;
 116
 117         if (strncmp(line, "\r\n", 2) == 0) {
 118                 DEBUG(11,("%s: All headers read\n", __func__));
 119
 120                 ret = http_response_needs_body(state->response);
 121                 switch (ret) {
 122                 case 1:
 123                         if (state->response->remaining_content_length <= state->max_content_length) {
 124                                 DEBUG(11, ("%s: Start of read body\n", __func__));
 125                                 state->parser_state = HTTP_READING_BODY;
 126                                 break;
 127                         }
 128                         FALL_THROUGH;
 129                 case 0:
 130                         DEBUG(11, ("%s: Skipping body for code %d\n", __func__,
 131                                    state->response->response_code));
 132                         state->parser_state = HTTP_READING_DONE;
 133                         break;
 134                 case -1:
 135                         DEBUG(0, ("%s_: Error in http_response_needs_body\n", __func__));
 136                         TALLOC_FREE(line);
 137                         return HTTP_DATA_CORRUPTED;
 138                         break;
 139                 }
 140
 141                 TALLOC_FREE(line);
 142                 return HTTP_ALL_DATA_READ;
 143         }
 144
 145         n = sscanf(line, "%m[^:]: %m[^\r\n]\r\n", &key, &value);
 146         if (n != 2) {
 147                 DEBUG(0, ("%s: Error parsing header '%s'\n", __func__, line));
 148                 status = HTTP_DATA_CORRUPTED;
 149                 goto error;
 150         }
 151
 152         if (http_add_header(state->response, &state->response->headers, key, value) == -1) {
 153                 DEBUG(0, ("%s: Error adding header\n", __func__));
 154                 status = HTTP_DATA_CORRUPTED;
 155                 goto error;
 156         }
 157
 158 error:
 159         free(key);
 160         free(value);
 161         TALLOC_FREE(line);
 162         return status;
 163 }
 164
 165 /**
 166  * Parses the first line of a HTTP response
 167  */
 168 static bool http_parse_response_line(struct http_read_response_state *state)
 169 {
 170         bool    status = true;
 171         char    *protocol;
 172         char    *msg = NULL;
 173         char    major;
 174         char    minor;
 175         int     code;
 176         char    *line = NULL;
 177         int     n;
 178
 179         /* Sanity checks */
 180         if (!state) {
 181                 DEBUG(0, ("%s: Input parameter is NULL\n", __func__));
 182                 return false;
 183         }
 184
 185         line = talloc_strndup(state, (char*)state->buffer.data, state->buffer.length);
 186         if (!line) {
 187                 DEBUG(0, ("%s: Memory error\n", __func__));
 188                 return false;
 189         }
 190
 191         n = sscanf(line, "%m[^/]/%c.%c %d %m[^\r\n]\r\n",
 192                    &protocol, &major, &minor, &code, &msg);
 193
 194         DEBUG(11, ("%s: Header parsed(%i): protocol->%s, major->%c, minor->%c, "
 195                    "code->%d, message->%s\n", __func__, n, protocol, major, minor,
 196                    code, msg));
 197
 198         if (n != 5) {
 199                 DEBUG(0, ("%s: Error parsing header\n", __func__));
 200                 status = false;
 201                 goto error;
 202         }
 203
 204         if (major != '1') {
 205                 DEBUG(0, ("%s: Bad HTTP major number '%c'\n", __func__, major));
 206                 status = false;
 207                 goto error;
 208         }
 209
 210         if (code == 0) {
 211                 DEBUG(0, ("%s: Bad response code '%d'", __func__, code));
 212                 status = false;
 213                 goto error;
 214         }
 215
 216         if (msg == NULL) {
 217                 DEBUG(0, ("%s: Error parsing HTTP data\n", __func__));
 218                 status = false;
 219                 goto error;
 220         }
 221
 222         state->response->major = major;
 223         state->response->minor = minor;
 224         state->response->response_code = code;
 225         state->response->response_code_line = talloc_strndup(state->response,
 226                                                              msg, strlen(msg));
 227
 228 error:
 229         free(protocol);
 230         free(msg);
 231         TALLOC_FREE(line);
 232         return status;
 233 }
 234
 235 /*
 236  * Parses header lines from a request or a response into the specified
 237  * request object given a buffer.
 238  *
 239  * Returns
 240  *   HTTP_DATA_CORRUPTED                on error
 241  *   HTTP_MORE_DATA_EXPECTED    when we need to read more headers
 242  *   HTTP_DATA_TOO_LONG                 on error
 243  *   HTTP_ALL_DATA_READ                 when all headers have been read
 244  */
 245 static enum http_read_status http_parse_firstline(struct http_read_response_state *state)
 246 {
 247         enum http_read_status   status = HTTP_ALL_DATA_READ;
 248         char                    *ptr = NULL;
 249         char                    *line;
 250
 251         /* Sanity checks */
 252         if (!state) {
 253                 DEBUG(0, ("%s: Invalid Parameter\n", __func__));
 254                 return HTTP_DATA_CORRUPTED;
 255         }
 256
 257         if (state->buffer.length > state->max_headers_size) {
 258                 DEBUG(0, ("%s: Headers too long: %zi, maximum length is %zi\n", __func__,
 259                           state->buffer.length, state->max_headers_size));
 260                 return HTTP_DATA_TOO_LONG;
 261         }
 262
 263         line = talloc_strndup(state, (char *)state->buffer.data, state->buffer.length);
 264         if (!line) {
 265                 DEBUG(0, ("%s: Not enough memory\n", __func__));
 266                 return HTTP_DATA_CORRUPTED;
 267         }
 268
 269         ptr = strstr(line, "\r\n");
 270         if (ptr == NULL) {
 271                 TALLOC_FREE(line);
 272                 return HTTP_MORE_DATA_EXPECTED;
 273         }
 274
 275         state->response->headers_size = state->buffer.length;
 276         if (!http_parse_response_line(state)) {
 277                 status = HTTP_DATA_CORRUPTED;
 278         }
 279
 280         /* Next state, read HTTP headers */
 281         state->parser_state = HTTP_READING_HEADERS;
 282
 283         TALLOC_FREE(line);
 284         return status;
 285 }
 286
 287 static enum http_read_status http_read_body(struct http_read_response_state *state)
 288 {
 289         struct http_request *resp = state->response;
 290
 291         if (state->buffer.length < resp->remaining_content_length) {
 292                 return HTTP_MORE_DATA_EXPECTED;
 293         }
 294
 295         resp->body = state->buffer;
 296         state->buffer = data_blob_null;
 297         talloc_steal(resp, resp->body.data);
 298         resp->remaining_content_length = 0;
 299
 300         state->parser_state = HTTP_READING_DONE;
 301         return HTTP_ALL_DATA_READ;
 302 }
 303
 304 static enum http_read_status http_read_trailer(struct http_read_response_state *state)
 305 {
 306         enum http_read_status status = HTTP_DATA_CORRUPTED;
 307         /* TODO */
 308         return status;
 309 }
 310
 311 static enum http_read_status http_parse_buffer(struct http_read_response_state *state)
 312 {
 313         if (!state) {
 314                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 315                 return HTTP_DATA_CORRUPTED;
 316         }
 317
 318         switch (state->parser_state) {
 319                 case HTTP_READING_FIRSTLINE:
 320                         return http_parse_firstline(state);
 321                 case HTTP_READING_HEADERS:
 322                         return http_parse_headers(state);
 323                 case HTTP_READING_BODY:
 324                         return http_read_body(state);
 325                         break;
 326                 case HTTP_READING_TRAILER:
 327                         return http_read_trailer(state);
 328                         break;
 329                 case HTTP_READING_DONE:
 330                         /* All read */
 331                         return HTTP_ALL_DATA_READ;
 332                 default:
 333                         DEBUG(0, ("%s: Illegal parser state %d", __func__,
 334                                   state->parser_state));
 335                         break;
 336         }
 337         return HTTP_DATA_CORRUPTED;
 338 }
 339
 340 static int http_header_is_valid_value(const char *value)
 341 {
 342         const char      *p = NULL;
 343
 344         /* Sanity checks */
 345         if (!value) {
 346                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 347                 return -1;
 348         }
 349         p = value;
 350
 351         while ((p = strpbrk(p, "\r\n")) != NULL) {
 352                 /* Expect only one new line */
 353                 p += strspn(p, "\r\n");
 354                 /* Expect a space or tab for continuation */
 355                 if (*p != ' ' && *p != '\t')
 356                         return (0);
 357         }
 358         return 1;
 359 }
 360
 361 static int http_add_header_internal(TALLOC_CTX *mem_ctx,
 362                                     struct http_header **headers,
 363                                     const char *key, const char *value,
 364                                     bool replace)
 365 {
 366         struct http_header *tail = NULL;
 367         struct http_header *h = NULL;
 368
 369         /* Sanity checks */
 370         if (!headers || !key || !value) {
 371                 DEBUG(0, ("Invalid parameter\n"));
 372                 return -1;
 373         }
 374
 375
 376
 377         if (replace) {
 378                 for (h = *headers; h != NULL; h = h->next) {
 379                         if (strcasecmp(key, h->key) == 0) {
 380                                 break;
 381                         }
 382                 }
 383
 384                 if (h != NULL) {
 385                         /* Replace header value */
 386                         if (h->value) {
 387                                 talloc_free(h->value);
 388                         }
 389                         h->value = talloc_strdup(h, value);
 390                         DEBUG(11, ("%s: Replaced HTTP header: key '%s', value '%s'\n",
 391                                         __func__, h->key, h->value));
 392                         return 0;
 393                 }
 394         }
 395
 396         /* Add new header */
 397         h = talloc(mem_ctx, struct http_header);
 398         h->key = talloc_strdup(h, key);
 399         h->value = talloc_strdup(h, value);
 400         DLIST_ADD_END(*headers, h);
 401         tail = DLIST_TAIL(*headers);
 402         if (tail != h) {
 403                 DEBUG(0, ("%s: Error adding header\n", __func__));
 404                 return -1;
 405         }
 406         DEBUG(11, ("%s: Added HTTP header: key '%s', value '%s'\n",
 407                         __func__, h->key, h->value));
 408         return 0;
 409 }
 410
 411 int http_add_header(TALLOC_CTX *mem_ctx,
 412                     struct http_header **headers,
 413                     const char *key, const char *value)
 414 {
 415         if (strchr(key, '\r') != NULL || strchr(key, '\n') != NULL) {
 416                 DEBUG(0, ("%s: Dropping illegal header key\n", __func__));
 417                 return -1;
 418         }
 419
 420         if (!http_header_is_valid_value(value)) {
 421                 DEBUG(0, ("%s: Dropping illegal header value\n", __func__));
 422                 return -1;
 423         }
 424
 425         return (http_add_header_internal(mem_ctx, headers, key, value, false));
 426 }
 427
 428 int http_replace_header(TALLOC_CTX *mem_ctx,
 429                     struct http_header **headers,
 430                     const char *key, const char *value)
 431 {
 432         if (strchr(key, '\r') != NULL || strchr(key, '\n') != NULL) {
 433                 DEBUG(0, ("%s: Dropping illegal header key\n", __func__));
 434                 return -1;
 435         }
 436
 437         if (!http_header_is_valid_value(value)) {
 438                 DEBUG(0, ("%s: Dropping illegal header value\n", __func__));
 439                 return -1;
 440         }
 441
 442         return (http_add_header_internal(mem_ctx, headers, key, value, true));
 443 }
 444
 445 /**
 446  * Remove a header from the headers list.
 447  *
 448  * Returns 0,  if the header was successfully removed.
 449  * Returns -1, if the header could not be found.
 450  */
 451 int http_remove_header(struct http_header **headers, const char *key)
 452 {
 453         struct http_header *header;
 454
 455         /* Sanity checks */
 456         if (!headers || !key) {
 457                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 458                 return -1;
 459         }
 460
 461         for(header = *headers; header != NULL; header = header->next) {
 462                 if (strcmp(key, header->key) == 0) {
 463                         DLIST_REMOVE(*headers, header);
 464                         return 0;
 465                 }
 466         }
 467         return -1;
 468 }
 469
 470 static int http_read_response_next_vector(struct tstream_context *stream,
 471                                           void *private_data,
 472                                           TALLOC_CTX *mem_ctx,
 473                                           struct iovec **_vector,
 474                                           size_t *_count)
 475 {
 476         struct http_read_response_state *state;
 477         struct iovec                    *vector;
 478
 479         /* Sanity checks */
 480         if (!stream || !private_data || !_vector || !_count) {
 481                 DEBUG(0, ("%s: Invalid Parameter\n", __func__));
 482                 return -1;
 483         }
 484
 485         state = talloc_get_type_abort(private_data, struct http_read_response_state);
 486         vector = talloc_array(mem_ctx, struct iovec, 1);
 487         if (!vector) {
 488                 DEBUG(0, ("%s: No more memory\n", __func__));
 489                 return -1;
 490         }
 491
 492         if (state->buffer.data == NULL) {
 493                 /* Allocate buffer */
 494                 state->buffer.data = talloc_zero_array(state, uint8_t, 1);
 495                 if (!state->buffer.data) {
 496                         DEBUG(0, ("%s: No more memory\n", __func__));
 497                         return -1;
 498                 }
 499                 state->buffer.length = 1;
 500
 501                 /* Return now, nothing to parse yet */
 502                 vector[0].iov_base = (void *)(state->buffer.data);
 503                 vector[0].iov_len = 1;
 504                 *_vector = vector;
 505                 *_count = 1;
 506                 return 0;
 507         }
 508
 509         switch (http_parse_buffer(state)) {
 510                 case HTTP_ALL_DATA_READ:
 511                         if (state->parser_state == HTTP_READING_DONE) {
 512                                 /* Full request or response parsed */
 513                                 *_vector = NULL;
 514                                 *_count = 0;
 515                         } else {
 516                                 /* Free current buffer and allocate new one */
 517                                 TALLOC_FREE(state->buffer.data);
 518                                 state->buffer.data = talloc_zero_array(state, uint8_t, 1);
 519                                 if (!state->buffer.data) {
 520                                         return -1;
 521                                 }
 522                                 state->buffer.length = 1;
 523
 524                                 vector[0].iov_base = (void *)(state->buffer.data);
 525                                 vector[0].iov_len = 1;
 526                                 *_vector = vector;
 527                                 *_count = 1;
 528                         }
 529                         break;
 530                 case HTTP_MORE_DATA_EXPECTED:
 531                         /* TODO Optimize, allocating byte by byte */
 532                         state->buffer.data = talloc_realloc(state, state->buffer.data,
 533                                                             uint8_t, state->buffer.length + 1);
 534                         if (!state->buffer.data) {
 535                                 return -1;
 536                         }
 537                         state->buffer.length++;
 538                         vector[0].iov_base = (void *)(state->buffer.data +
 539                                                       state->buffer.length - 1);
 540                         vector[0].iov_len = 1;
 541                         *_vector = vector;
 542                         *_count = 1;
 543                         break;
 544                 case HTTP_DATA_CORRUPTED:
 545                 case HTTP_REQUEST_CANCELED:
 546                 case HTTP_DATA_TOO_LONG:
 547                         return -1;
 548                         break;
 549                 default:
 550                         DEBUG(0, ("%s: Unexpected status\n", __func__));
 551                         break;
 552         }
 553         return 0;
 554 }
 555
 556
 557 /**
 558  * Reads a HTTP response
 559  */
 560 static void http_read_response_done(struct tevent_req *);
 561 struct tevent_req *http_read_response_send(TALLOC_CTX *mem_ctx,
 562                                            struct tevent_context *ev,
 563                                            struct http_conn *http_conn,
 564                                            size_t max_content_length)
 565 {
 566         struct tevent_req               *req;
 567         struct tevent_req               *subreq;
 568         struct http_read_response_state *state;
 569
 570         DEBUG(11, ("%s: Reading HTTP response\n", __func__));
 571
 572         /* Sanity checks */
 573         if (ev == NULL || http_conn == NULL) {
 574                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 575                 return NULL;
 576         }
 577
 578         req = tevent_req_create(mem_ctx, &state, struct http_read_response_state);
 579         if (req == NULL) {
 580                 return NULL;
 581         }
 582
 583         state->max_headers_size = HTTP_MAX_HEADER_SIZE;
 584         state->max_content_length = (uint64_t)max_content_length;
 585         state->parser_state = HTTP_READING_FIRSTLINE;
 586         state->response = talloc_zero(state, struct http_request);
 587         if (tevent_req_nomem(state->response, req)) {
 588                 return tevent_req_post(req, ev);
 589         }
 590
 591         subreq = tstream_readv_pdu_send(state, ev, http_conn->tstreams.active,
 592                                         http_read_response_next_vector,
 593                                         state);
 594         if (tevent_req_nomem(subreq,req)) {
 595                 return tevent_req_post(req, ev);
 596         }
 597         tevent_req_set_callback(subreq, http_read_response_done, req);
 598
 599         return req;
 600 }
 601
 602 static void http_read_response_done(struct tevent_req *subreq)
 603 {
 604         NTSTATUS                        status;
 605         struct tevent_req               *req;
 606         int                             ret;
 607         int                             sys_errno;
 608
 609         if (!subreq) {
 610                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 611                 return;
 612         }
 613
 614         req = tevent_req_callback_data(subreq, struct tevent_req);
 615
 616         ret = tstream_readv_pdu_recv(subreq, &sys_errno);
 617         DEBUG(11, ("%s: HTTP response read (%d bytes)\n", __func__, ret));
 618         TALLOC_FREE(subreq);
 619         if (ret == -1) {
 620                 status = map_nt_error_from_unix_common(sys_errno);
 621                 DEBUG(0, ("%s: Failed to read HTTP response: %s\n",
 622                           __func__, nt_errstr(status)));
 623                 tevent_req_nterror(req, status);
 624                 return;
 625         }
 626
 627         tevent_req_done(req);
 628 }
 629
 630 NTSTATUS http_read_response_recv(struct tevent_req *req,
 631                                  TALLOC_CTX *mem_ctx,
 632                                  struct http_request **response)
 633 {
 634         NTSTATUS status;
 635         struct http_read_response_state *state;
 636
 637         if (!mem_ctx || !response || !req) {
 638                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 639                 return NT_STATUS_INVALID_PARAMETER;
 640         }
 641         if (tevent_req_is_nterror(req, &status)) {
 642                 tevent_req_received(req);
 643                 return status;
 644         }
 645
 646         state = tevent_req_data(req, struct http_read_response_state);
 647         *response = state->response;
 648         talloc_steal(mem_ctx, state->response);
 649
 650         tevent_req_received(req);
 651
 652         return NT_STATUS_OK;
 653 }
 654
 655 static const char *http_method_str(enum http_cmd_type type)
 656 {
 657         const char *method;
 658
 659         switch (type) {
 660         case HTTP_REQ_POST:
 661                 method = "POST";
 662                 break;
 663         case HTTP_REQ_RPC_IN_DATA:
 664                 method = "RPC_IN_DATA";
 665                 break;
 666         case HTTP_REQ_RPC_OUT_DATA:
 667                 method = "RPC_OUT_DATA";
 668                 break;
 669         default:
 670                 method = NULL;
 671                 break;
 672         }
 673
 674         return method;
 675 }
 676
 677 static NTSTATUS http_push_request_line(TALLOC_CTX *mem_ctx,
 678                                        DATA_BLOB *buffer,
 679                                        const struct http_request *req)
 680 {
 681         const char      *method;
 682         char            *str;
 683
 684         /* Sanity checks */
 685         if (!buffer || !req) {
 686                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 687                 return NT_STATUS_INVALID_PARAMETER;
 688         }
 689
 690         method = http_method_str(req->type);
 691         if (method == NULL) {
 692                 return NT_STATUS_INVALID_PARAMETER;
 693         }
 694
 695         str = talloc_asprintf(mem_ctx, "%s %s HTTP/%c.%c\r\n", method,
 696                               req->uri, req->major, req->minor);
 697         if (str == NULL)
 698                 return NT_STATUS_NO_MEMORY;
 699
 700         if (!data_blob_append(mem_ctx, buffer, str, strlen(str))) {
 701                 talloc_free(str);
 702                 return NT_STATUS_NO_MEMORY;
 703         }
 704
 705         talloc_free(str);
 706         return NT_STATUS_OK;
 707 }
 708
 709 static NTSTATUS http_push_headers(TALLOC_CTX *mem_ctx,
 710                                   DATA_BLOB *blob,
 711                                   struct http_request *req)
 712 {
 713         struct http_header      *header = NULL;
 714         char                    *header_str = NULL;
 715         size_t                  len;
 716
 717         /* Sanity checks */
 718         if (!blob || !req) {
 719                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 720                 return NT_STATUS_INVALID_PARAMETER;
 721         }
 722
 723         for (header = req->headers; header != NULL; header = header->next) {
 724                 header_str = talloc_asprintf(mem_ctx, "%s: %s\r\n",
 725                                              header->key, header->value);
 726                 if (header_str == NULL) {
 727                         return NT_STATUS_NO_MEMORY;
 728                 }
 729
 730                 len = strlen(header_str);
 731                 if (!data_blob_append(mem_ctx, blob, header_str, len)) {
 732                         talloc_free(header_str);
 733                         return NT_STATUS_NO_MEMORY;
 734                 }
 735                 talloc_free(header_str);
 736         }
 737
 738         if (!data_blob_append(mem_ctx, blob, "\r\n",2)) {
 739                 return NT_STATUS_NO_MEMORY;
 740         }
 741
 742         return NT_STATUS_OK;
 743 }
 744
 745
 746 static NTSTATUS http_push_body(TALLOC_CTX *mem_ctx,
 747                                DATA_BLOB *blob,
 748                                struct http_request *req)
 749 {
 750         /* Sanity checks */
 751         if (!blob || !req) {
 752                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 753                 return NT_STATUS_INVALID_PARAMETER;
 754         }
 755
 756         if (req->body.length) {
 757                 if (!data_blob_append(mem_ctx, blob, req->body.data,
 758                                 req->body.length)) {
 759                         return NT_STATUS_NO_MEMORY;
 760                 }
 761         }
 762
 763         return NT_STATUS_OK;
 764 }
 765
 766 struct http_send_request_state {
 767         struct tevent_context   *ev;
 768         struct loadparm_context *lp_ctx;
 769         struct cli_credentials  *credentials;
 770         struct http_request     *request;
 771         DATA_BLOB               buffer;
 772         struct iovec            iov;
 773         ssize_t                 nwritten;
 774         int                     sys_errno;
 775 };
 776
 777 /**
 778  * Sends and HTTP request
 779  */
 780 static void http_send_request_done(struct tevent_req *);
 781 struct tevent_req *http_send_request_send(TALLOC_CTX *mem_ctx,
 782                                           struct tevent_context *ev,
 783                                           struct http_conn *http_conn,
 784                                           struct http_request *request)
 785 {
 786         struct tevent_req               *req;
 787         struct tevent_req               *subreq;
 788         struct http_send_request_state  *state = NULL;
 789         NTSTATUS                        status;
 790
 791         DEBUG(11, ("%s: Sending HTTP request\n", __func__));
 792
 793         /* Sanity checks */
 794         if (ev == NULL || request == NULL || http_conn == NULL) {
 795                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 796                 return NULL;
 797         }
 798
 799         req = tevent_req_create(mem_ctx, &state, struct http_send_request_state);
 800         if (req == NULL) {
 801                 return NULL;
 802         }
 803
 804         state->ev = ev;
 805         state->request = request;
 806
 807         /* Push the request line */
 808         status = http_push_request_line(state, &state->buffer, state->request);
 809         if (!NT_STATUS_IS_OK(status)) {
 810                 tevent_req_nterror(req, status);
 811                 return tevent_req_post(req, ev);
 812         }
 813
 814         /* Push the headers */
 815         status = http_push_headers(mem_ctx, &state->buffer, request);
 816         if (!NT_STATUS_IS_OK(status)) {
 817                 tevent_req_nterror(req, status);
 818                 return tevent_req_post(req, ev);
 819         }
 820
 821         /* Push the body */
 822         status = http_push_body(mem_ctx, &state->buffer, request);
 823         if (!NT_STATUS_IS_OK(status)) {
 824                 tevent_req_nterror(req, status);
 825                 return tevent_req_post(req, ev);
 826         }
 827
 828         state->iov.iov_base = (char *) state->buffer.data;
 829         state->iov.iov_len = state->buffer.length;
 830         subreq = tstream_writev_queue_send(state,
 831                                            ev,
 832                                            http_conn->tstreams.active,
 833                                            http_conn->send_queue,
 834                                            &state->iov, 1);
 835         if (tevent_req_nomem(subreq, req)) {
 836                 return tevent_req_post(req, ev);
 837         }
 838         tevent_req_set_callback(subreq, http_send_request_done, req);
 839
 840         return req;
 841 }
 842
 843 static void http_send_request_done(struct tevent_req *subreq)
 844 {
 845         NTSTATUS                        status;
 846         struct tevent_req               *req;
 847         struct http_send_request_state  *state;
 848
 849         req = tevent_req_callback_data(subreq, struct tevent_req);
 850         state = tevent_req_data(req, struct http_send_request_state);
 851
 852         state->nwritten = tstream_writev_queue_recv(subreq, &state->sys_errno);
 853         TALLOC_FREE(subreq);
 854         if (state->nwritten == -1 && state->sys_errno != 0) {
 855                 status = map_nt_error_from_unix_common(state->sys_errno);
 856                 DEBUG(0, ("%s: Failed to send HTTP request: %s\n",
 857                           __func__, nt_errstr(status)));
 858                 tevent_req_nterror(req, status);
 859                 return;
 860         }
 861
 862         tevent_req_done(req);
 863 }
 864
 865 NTSTATUS http_send_request_recv(struct tevent_req *req)
 866 {
 867         NTSTATUS status;
 868
 869         if (!req) {
 870                 DEBUG(0, ("%s: Invalid parameter\n", __func__));
 871                 return NT_STATUS_INVALID_PARAMETER;
 872         }
 873
 874         if (tevent_req_is_nterror(req, &status)) {
 875                 tevent_req_received(req);
 876                 return status;
 877         }
 878
 879         tevent_req_received(req);
 880
 881         return NT_STATUS_OK;
 882 }