Annotation of embedaddon/curl/lib/sendf.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
! 9: *
! 10: * This software is licensed as described in the file COPYING, which
! 11: * you should have received as part of this distribution. The terms
! 12: * are also available at https://curl.haxx.se/docs/copyright.html.
! 13: *
! 14: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 15: * copies of the Software, and permit persons to whom the Software is
! 16: * furnished to do so, under the terms of the COPYING file.
! 17: *
! 18: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 19: * KIND, either express or implied.
! 20: *
! 21: ***************************************************************************/
! 22:
! 23: #include "curl_setup.h"
! 24:
! 25: #ifdef HAVE_NETINET_IN_H
! 26: #include <netinet/in.h>
! 27: #endif
! 28:
! 29: #ifdef HAVE_LINUX_TCP_H
! 30: #include <linux/tcp.h>
! 31: #endif
! 32:
! 33: #include <curl/curl.h>
! 34:
! 35: #include "urldata.h"
! 36: #include "sendf.h"
! 37: #include "connect.h"
! 38: #include "vtls/vtls.h"
! 39: #include "vssh/ssh.h"
! 40: #include "easyif.h"
! 41: #include "multiif.h"
! 42: #include "non-ascii.h"
! 43: #include "strerror.h"
! 44: #include "select.h"
! 45: #include "strdup.h"
! 46: #include "http2.h"
! 47:
! 48: /* The last 3 #include files should be in this order */
! 49: #include "curl_printf.h"
! 50: #include "curl_memory.h"
! 51: #include "memdebug.h"
! 52:
! 53: #ifdef CURL_DO_LINEEND_CONV
! 54: /*
! 55: * convert_lineends() changes CRLF (\r\n) end-of-line markers to a single LF
! 56: * (\n), with special processing for CRLF sequences that are split between two
! 57: * blocks of data. Remaining, bare CRs are changed to LFs. The possibly new
! 58: * size of the data is returned.
! 59: */
! 60: static size_t convert_lineends(struct Curl_easy *data,
! 61: char *startPtr, size_t size)
! 62: {
! 63: char *inPtr, *outPtr;
! 64:
! 65: /* sanity check */
! 66: if((startPtr == NULL) || (size < 1)) {
! 67: return size;
! 68: }
! 69:
! 70: if(data->state.prev_block_had_trailing_cr) {
! 71: /* The previous block of incoming data
! 72: had a trailing CR, which was turned into a LF. */
! 73: if(*startPtr == '\n') {
! 74: /* This block of incoming data starts with the
! 75: previous block's LF so get rid of it */
! 76: memmove(startPtr, startPtr + 1, size-1);
! 77: size--;
! 78: /* and it wasn't a bare CR but a CRLF conversion instead */
! 79: data->state.crlf_conversions++;
! 80: }
! 81: data->state.prev_block_had_trailing_cr = FALSE; /* reset the flag */
! 82: }
! 83:
! 84: /* find 1st CR, if any */
! 85: inPtr = outPtr = memchr(startPtr, '\r', size);
! 86: if(inPtr) {
! 87: /* at least one CR, now look for CRLF */
! 88: while(inPtr < (startPtr + size-1)) {
! 89: /* note that it's size-1, so we'll never look past the last byte */
! 90: if(memcmp(inPtr, "\r\n", 2) == 0) {
! 91: /* CRLF found, bump past the CR and copy the NL */
! 92: inPtr++;
! 93: *outPtr = *inPtr;
! 94: /* keep track of how many CRLFs we converted */
! 95: data->state.crlf_conversions++;
! 96: }
! 97: else {
! 98: if(*inPtr == '\r') {
! 99: /* lone CR, move LF instead */
! 100: *outPtr = '\n';
! 101: }
! 102: else {
! 103: /* not a CRLF nor a CR, just copy whatever it is */
! 104: *outPtr = *inPtr;
! 105: }
! 106: }
! 107: outPtr++;
! 108: inPtr++;
! 109: } /* end of while loop */
! 110:
! 111: if(inPtr < startPtr + size) {
! 112: /* handle last byte */
! 113: if(*inPtr == '\r') {
! 114: /* deal with a CR at the end of the buffer */
! 115: *outPtr = '\n'; /* copy a NL instead */
! 116: /* note that a CRLF might be split across two blocks */
! 117: data->state.prev_block_had_trailing_cr = TRUE;
! 118: }
! 119: else {
! 120: /* copy last byte */
! 121: *outPtr = *inPtr;
! 122: }
! 123: outPtr++;
! 124: }
! 125: if(outPtr < startPtr + size)
! 126: /* tidy up by null terminating the now shorter data */
! 127: *outPtr = '\0';
! 128:
! 129: return (outPtr - startPtr);
! 130: }
! 131: return size;
! 132: }
! 133: #endif /* CURL_DO_LINEEND_CONV */
! 134:
! 135: #ifdef USE_RECV_BEFORE_SEND_WORKAROUND
! 136: bool Curl_recv_has_postponed_data(struct connectdata *conn, int sockindex)
! 137: {
! 138: struct postponed_data * const psnd = &(conn->postponed[sockindex]);
! 139: return psnd->buffer && psnd->allocated_size &&
! 140: psnd->recv_size > psnd->recv_processed;
! 141: }
! 142:
! 143: static void pre_receive_plain(struct connectdata *conn, int num)
! 144: {
! 145: const curl_socket_t sockfd = conn->sock[num];
! 146: struct postponed_data * const psnd = &(conn->postponed[num]);
! 147: size_t bytestorecv = psnd->allocated_size - psnd->recv_size;
! 148: /* WinSock will destroy unread received data if send() is
! 149: failed.
! 150: To avoid lossage of received data, recv() must be
! 151: performed before every send() if any incoming data is
! 152: available. However, skip this, if buffer is already full. */
! 153: if((conn->handler->protocol&PROTO_FAMILY_HTTP) != 0 &&
! 154: conn->recv[num] == Curl_recv_plain &&
! 155: (!psnd->buffer || bytestorecv)) {
! 156: const int readymask = Curl_socket_check(sockfd, CURL_SOCKET_BAD,
! 157: CURL_SOCKET_BAD, 0);
! 158: if(readymask != -1 && (readymask & CURL_CSELECT_IN) != 0) {
! 159: /* Have some incoming data */
! 160: if(!psnd->buffer) {
! 161: /* Use buffer double default size for intermediate buffer */
! 162: psnd->allocated_size = 2 * conn->data->set.buffer_size;
! 163: psnd->buffer = malloc(psnd->allocated_size);
! 164: psnd->recv_size = 0;
! 165: psnd->recv_processed = 0;
! 166: #ifdef DEBUGBUILD
! 167: psnd->bindsock = sockfd; /* Used only for DEBUGASSERT */
! 168: #endif /* DEBUGBUILD */
! 169: bytestorecv = psnd->allocated_size;
! 170: }
! 171: if(psnd->buffer) {
! 172: ssize_t recvedbytes;
! 173: DEBUGASSERT(psnd->bindsock == sockfd);
! 174: recvedbytes = sread(sockfd, psnd->buffer + psnd->recv_size,
! 175: bytestorecv);
! 176: if(recvedbytes > 0)
! 177: psnd->recv_size += recvedbytes;
! 178: }
! 179: else
! 180: psnd->allocated_size = 0;
! 181: }
! 182: }
! 183: }
! 184:
! 185: static ssize_t get_pre_recved(struct connectdata *conn, int num, char *buf,
! 186: size_t len)
! 187: {
! 188: struct postponed_data * const psnd = &(conn->postponed[num]);
! 189: size_t copysize;
! 190: if(!psnd->buffer)
! 191: return 0;
! 192:
! 193: DEBUGASSERT(psnd->allocated_size > 0);
! 194: DEBUGASSERT(psnd->recv_size <= psnd->allocated_size);
! 195: DEBUGASSERT(psnd->recv_processed <= psnd->recv_size);
! 196: /* Check and process data that already received and storied in internal
! 197: intermediate buffer */
! 198: if(psnd->recv_size > psnd->recv_processed) {
! 199: DEBUGASSERT(psnd->bindsock == conn->sock[num]);
! 200: copysize = CURLMIN(len, psnd->recv_size - psnd->recv_processed);
! 201: memcpy(buf, psnd->buffer + psnd->recv_processed, copysize);
! 202: psnd->recv_processed += copysize;
! 203: }
! 204: else
! 205: copysize = 0; /* buffer was allocated, but nothing was received */
! 206:
! 207: /* Free intermediate buffer if it has no unprocessed data */
! 208: if(psnd->recv_processed == psnd->recv_size) {
! 209: free(psnd->buffer);
! 210: psnd->buffer = NULL;
! 211: psnd->allocated_size = 0;
! 212: psnd->recv_size = 0;
! 213: psnd->recv_processed = 0;
! 214: #ifdef DEBUGBUILD
! 215: psnd->bindsock = CURL_SOCKET_BAD;
! 216: #endif /* DEBUGBUILD */
! 217: }
! 218: return (ssize_t)copysize;
! 219: }
! 220: #else /* ! USE_RECV_BEFORE_SEND_WORKAROUND */
! 221: /* Use "do-nothing" macros instead of functions when workaround not used */
! 222: bool Curl_recv_has_postponed_data(struct connectdata *conn, int sockindex)
! 223: {
! 224: (void)conn;
! 225: (void)sockindex;
! 226: return false;
! 227: }
! 228: #define pre_receive_plain(c,n) do {} while(0)
! 229: #define get_pre_recved(c,n,b,l) 0
! 230: #endif /* ! USE_RECV_BEFORE_SEND_WORKAROUND */
! 231:
! 232: /* Curl_infof() is for info message along the way */
! 233:
! 234: void Curl_infof(struct Curl_easy *data, const char *fmt, ...)
! 235: {
! 236: if(data && data->set.verbose) {
! 237: va_list ap;
! 238: size_t len;
! 239: char print_buffer[2048 + 1];
! 240: va_start(ap, fmt);
! 241: len = mvsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
! 242: /*
! 243: * Indicate truncation of the input by replacing the last 3 characters
! 244: * with "...", and transfer the newline over in case the format had one.
! 245: */
! 246: if(len >= sizeof(print_buffer)) {
! 247: len = strlen(fmt);
! 248: if(fmt[--len] == '\n')
! 249: msnprintf(print_buffer + (sizeof(print_buffer) - 5), 5, "...\n");
! 250: else
! 251: msnprintf(print_buffer + (sizeof(print_buffer) - 4), 4, "...");
! 252: }
! 253: va_end(ap);
! 254: len = strlen(print_buffer);
! 255: Curl_debug(data, CURLINFO_TEXT, print_buffer, len);
! 256: }
! 257: }
! 258:
! 259: /* Curl_failf() is for messages stating why we failed.
! 260: * The message SHALL NOT include any LF or CR.
! 261: */
! 262:
! 263: void Curl_failf(struct Curl_easy *data, const char *fmt, ...)
! 264: {
! 265: if(data->set.verbose || data->set.errorbuffer) {
! 266: va_list ap;
! 267: size_t len;
! 268: char error[CURL_ERROR_SIZE + 2];
! 269: va_start(ap, fmt);
! 270: mvsnprintf(error, CURL_ERROR_SIZE, fmt, ap);
! 271: len = strlen(error);
! 272:
! 273: if(data->set.errorbuffer && !data->state.errorbuf) {
! 274: strcpy(data->set.errorbuffer, error);
! 275: data->state.errorbuf = TRUE; /* wrote error string */
! 276: }
! 277: if(data->set.verbose) {
! 278: error[len] = '\n';
! 279: error[++len] = '\0';
! 280: Curl_debug(data, CURLINFO_TEXT, error, len);
! 281: }
! 282: va_end(ap);
! 283: }
! 284: }
! 285:
! 286: /* Curl_sendf() sends formatted data to the server */
! 287: CURLcode Curl_sendf(curl_socket_t sockfd, struct connectdata *conn,
! 288: const char *fmt, ...)
! 289: {
! 290: struct Curl_easy *data = conn->data;
! 291: ssize_t bytes_written;
! 292: size_t write_len;
! 293: CURLcode result = CURLE_OK;
! 294: char *s;
! 295: char *sptr;
! 296: va_list ap;
! 297: va_start(ap, fmt);
! 298: s = vaprintf(fmt, ap); /* returns an allocated string */
! 299: va_end(ap);
! 300: if(!s)
! 301: return CURLE_OUT_OF_MEMORY; /* failure */
! 302:
! 303: bytes_written = 0;
! 304: write_len = strlen(s);
! 305: sptr = s;
! 306:
! 307: for(;;) {
! 308: /* Write the buffer to the socket */
! 309: result = Curl_write(conn, sockfd, sptr, write_len, &bytes_written);
! 310:
! 311: if(result)
! 312: break;
! 313:
! 314: if(data->set.verbose)
! 315: Curl_debug(data, CURLINFO_DATA_OUT, sptr, (size_t)bytes_written);
! 316:
! 317: if((size_t)bytes_written != write_len) {
! 318: /* if not all was written at once, we must advance the pointer, decrease
! 319: the size left and try again! */
! 320: write_len -= bytes_written;
! 321: sptr += bytes_written;
! 322: }
! 323: else
! 324: break;
! 325: }
! 326:
! 327: free(s); /* free the output string */
! 328:
! 329: return result;
! 330: }
! 331:
! 332: /*
! 333: * Curl_write() is an internal write function that sends data to the
! 334: * server. Works with plain sockets, SCP, SSL or kerberos.
! 335: *
! 336: * If the write would block (CURLE_AGAIN), we return CURLE_OK and
! 337: * (*written == 0). Otherwise we return regular CURLcode value.
! 338: */
! 339: CURLcode Curl_write(struct connectdata *conn,
! 340: curl_socket_t sockfd,
! 341: const void *mem,
! 342: size_t len,
! 343: ssize_t *written)
! 344: {
! 345: ssize_t bytes_written;
! 346: CURLcode result = CURLE_OK;
! 347: int num = (sockfd == conn->sock[SECONDARYSOCKET]);
! 348:
! 349: bytes_written = conn->send[num](conn, num, mem, len, &result);
! 350:
! 351: *written = bytes_written;
! 352: if(bytes_written >= 0)
! 353: /* we completely ignore the curlcode value when subzero is not returned */
! 354: return CURLE_OK;
! 355:
! 356: /* handle CURLE_AGAIN or a send failure */
! 357: switch(result) {
! 358: case CURLE_AGAIN:
! 359: *written = 0;
! 360: return CURLE_OK;
! 361:
! 362: case CURLE_OK:
! 363: /* general send failure */
! 364: return CURLE_SEND_ERROR;
! 365:
! 366: default:
! 367: /* we got a specific curlcode, forward it */
! 368: return result;
! 369: }
! 370: }
! 371:
! 372: ssize_t Curl_send_plain(struct connectdata *conn, int num,
! 373: const void *mem, size_t len, CURLcode *code)
! 374: {
! 375: curl_socket_t sockfd = conn->sock[num];
! 376: ssize_t bytes_written;
! 377: /* WinSock will destroy unread received data if send() is
! 378: failed.
! 379: To avoid lossage of received data, recv() must be
! 380: performed before every send() if any incoming data is
! 381: available. */
! 382: pre_receive_plain(conn, num);
! 383:
! 384: #if defined(MSG_FASTOPEN) && !defined(TCP_FASTOPEN_CONNECT) /* Linux */
! 385: if(conn->bits.tcp_fastopen) {
! 386: bytes_written = sendto(sockfd, mem, len, MSG_FASTOPEN,
! 387: conn->ip_addr->ai_addr, conn->ip_addr->ai_addrlen);
! 388: conn->bits.tcp_fastopen = FALSE;
! 389: }
! 390: else
! 391: #endif
! 392: bytes_written = swrite(sockfd, mem, len);
! 393:
! 394: *code = CURLE_OK;
! 395: if(-1 == bytes_written) {
! 396: int err = SOCKERRNO;
! 397:
! 398: if(
! 399: #ifdef WSAEWOULDBLOCK
! 400: /* This is how Windows does it */
! 401: (WSAEWOULDBLOCK == err)
! 402: #else
! 403: /* errno may be EWOULDBLOCK or on some systems EAGAIN when it returned
! 404: due to its inability to send off data without blocking. We therefore
! 405: treat both error codes the same here */
! 406: (EWOULDBLOCK == err) || (EAGAIN == err) || (EINTR == err) ||
! 407: (EINPROGRESS == err)
! 408: #endif
! 409: ) {
! 410: /* this is just a case of EWOULDBLOCK */
! 411: bytes_written = 0;
! 412: *code = CURLE_AGAIN;
! 413: }
! 414: else {
! 415: char buffer[STRERROR_LEN];
! 416: failf(conn->data, "Send failure: %s",
! 417: Curl_strerror(err, buffer, sizeof(buffer)));
! 418: conn->data->state.os_errno = err;
! 419: *code = CURLE_SEND_ERROR;
! 420: }
! 421: }
! 422: return bytes_written;
! 423: }
! 424:
! 425: /*
! 426: * Curl_write_plain() is an internal write function that sends data to the
! 427: * server using plain sockets only. Otherwise meant to have the exact same
! 428: * proto as Curl_write()
! 429: */
! 430: CURLcode Curl_write_plain(struct connectdata *conn,
! 431: curl_socket_t sockfd,
! 432: const void *mem,
! 433: size_t len,
! 434: ssize_t *written)
! 435: {
! 436: ssize_t bytes_written;
! 437: CURLcode result;
! 438: int num = (sockfd == conn->sock[SECONDARYSOCKET]);
! 439:
! 440: bytes_written = Curl_send_plain(conn, num, mem, len, &result);
! 441:
! 442: *written = bytes_written;
! 443:
! 444: return result;
! 445: }
! 446:
! 447: ssize_t Curl_recv_plain(struct connectdata *conn, int num, char *buf,
! 448: size_t len, CURLcode *code)
! 449: {
! 450: curl_socket_t sockfd = conn->sock[num];
! 451: ssize_t nread;
! 452: /* Check and return data that already received and storied in internal
! 453: intermediate buffer */
! 454: nread = get_pre_recved(conn, num, buf, len);
! 455: if(nread > 0) {
! 456: *code = CURLE_OK;
! 457: return nread;
! 458: }
! 459:
! 460: nread = sread(sockfd, buf, len);
! 461:
! 462: *code = CURLE_OK;
! 463: if(-1 == nread) {
! 464: int err = SOCKERRNO;
! 465:
! 466: if(
! 467: #ifdef WSAEWOULDBLOCK
! 468: /* This is how Windows does it */
! 469: (WSAEWOULDBLOCK == err)
! 470: #else
! 471: /* errno may be EWOULDBLOCK or on some systems EAGAIN when it returned
! 472: due to its inability to send off data without blocking. We therefore
! 473: treat both error codes the same here */
! 474: (EWOULDBLOCK == err) || (EAGAIN == err) || (EINTR == err)
! 475: #endif
! 476: ) {
! 477: /* this is just a case of EWOULDBLOCK */
! 478: *code = CURLE_AGAIN;
! 479: }
! 480: else {
! 481: char buffer[STRERROR_LEN];
! 482: failf(conn->data, "Recv failure: %s",
! 483: Curl_strerror(err, buffer, sizeof(buffer)));
! 484: conn->data->state.os_errno = err;
! 485: *code = CURLE_RECV_ERROR;
! 486: }
! 487: }
! 488: return nread;
! 489: }
! 490:
! 491: static CURLcode pausewrite(struct Curl_easy *data,
! 492: int type, /* what type of data */
! 493: const char *ptr,
! 494: size_t len)
! 495: {
! 496: /* signalled to pause sending on this connection, but since we have data
! 497: we want to send we need to dup it to save a copy for when the sending
! 498: is again enabled */
! 499: struct SingleRequest *k = &data->req;
! 500: struct UrlState *s = &data->state;
! 501: char *dupl;
! 502: unsigned int i;
! 503: bool newtype = TRUE;
! 504:
! 505: /* If this transfers over HTTP/2, pause the stream! */
! 506: Curl_http2_stream_pause(data, TRUE);
! 507:
! 508: if(s->tempcount) {
! 509: for(i = 0; i< s->tempcount; i++) {
! 510: if(s->tempwrite[i].type == type) {
! 511: /* data for this type exists */
! 512: newtype = FALSE;
! 513: break;
! 514: }
! 515: }
! 516: DEBUGASSERT(i < 3);
! 517: }
! 518: else
! 519: i = 0;
! 520:
! 521: if(!newtype) {
! 522: /* append new data to old data */
! 523:
! 524: /* figure out the new size of the data to save */
! 525: size_t newlen = len + s->tempwrite[i].len;
! 526: /* allocate the new memory area */
! 527: char *newptr = realloc(s->tempwrite[i].buf, newlen);
! 528: if(!newptr)
! 529: return CURLE_OUT_OF_MEMORY;
! 530: /* copy the new data to the end of the new area */
! 531: memcpy(newptr + s->tempwrite[i].len, ptr, len);
! 532:
! 533: /* update the pointer and the size */
! 534: s->tempwrite[i].buf = newptr;
! 535: s->tempwrite[i].len = newlen;
! 536:
! 537: len = newlen; /* for the debug output below */
! 538: }
! 539: else {
! 540: dupl = Curl_memdup(ptr, len);
! 541: if(!dupl)
! 542: return CURLE_OUT_OF_MEMORY;
! 543:
! 544: /* store this information in the state struct for later use */
! 545: s->tempwrite[i].buf = dupl;
! 546: s->tempwrite[i].len = len;
! 547: s->tempwrite[i].type = type;
! 548:
! 549: if(newtype)
! 550: s->tempcount++;
! 551: }
! 552:
! 553: /* mark the connection as RECV paused */
! 554: k->keepon |= KEEP_RECV_PAUSE;
! 555:
! 556: DEBUGF(infof(data, "Paused %zu bytes in buffer for type %02x\n",
! 557: len, type));
! 558:
! 559: return CURLE_OK;
! 560: }
! 561:
! 562:
! 563: /* chop_write() writes chunks of data not larger than CURL_MAX_WRITE_SIZE via
! 564: * client write callback(s) and takes care of pause requests from the
! 565: * callbacks.
! 566: */
! 567: static CURLcode chop_write(struct connectdata *conn,
! 568: int type,
! 569: char *optr,
! 570: size_t olen)
! 571: {
! 572: struct Curl_easy *data = conn->data;
! 573: curl_write_callback writeheader = NULL;
! 574: curl_write_callback writebody = NULL;
! 575: char *ptr = optr;
! 576: size_t len = olen;
! 577:
! 578: if(!len)
! 579: return CURLE_OK;
! 580:
! 581: /* If reading is paused, append this data to the already held data for this
! 582: type. */
! 583: if(data->req.keepon & KEEP_RECV_PAUSE)
! 584: return pausewrite(data, type, ptr, len);
! 585:
! 586: /* Determine the callback(s) to use. */
! 587: if(type & CLIENTWRITE_BODY)
! 588: writebody = data->set.fwrite_func;
! 589: if((type & CLIENTWRITE_HEADER) &&
! 590: (data->set.fwrite_header || data->set.writeheader)) {
! 591: /*
! 592: * Write headers to the same callback or to the especially setup
! 593: * header callback function (added after version 7.7.1).
! 594: */
! 595: writeheader =
! 596: data->set.fwrite_header? data->set.fwrite_header: data->set.fwrite_func;
! 597: }
! 598:
! 599: /* Chop data, write chunks. */
! 600: while(len) {
! 601: size_t chunklen = len <= CURL_MAX_WRITE_SIZE? len: CURL_MAX_WRITE_SIZE;
! 602:
! 603: if(writebody) {
! 604: size_t wrote;
! 605: Curl_set_in_callback(data, true);
! 606: wrote = writebody(ptr, 1, chunklen, data->set.out);
! 607: Curl_set_in_callback(data, false);
! 608:
! 609: if(CURL_WRITEFUNC_PAUSE == wrote) {
! 610: if(conn->handler->flags & PROTOPT_NONETWORK) {
! 611: /* Protocols that work without network cannot be paused. This is
! 612: actually only FILE:// just now, and it can't pause since the
! 613: transfer isn't done using the "normal" procedure. */
! 614: failf(data, "Write callback asked for PAUSE when not supported!");
! 615: return CURLE_WRITE_ERROR;
! 616: }
! 617: return pausewrite(data, type, ptr, len);
! 618: }
! 619: if(wrote != chunklen) {
! 620: failf(data, "Failed writing body (%zu != %zu)", wrote, chunklen);
! 621: return CURLE_WRITE_ERROR;
! 622: }
! 623: }
! 624:
! 625: ptr += chunklen;
! 626: len -= chunklen;
! 627: }
! 628:
! 629: if(writeheader) {
! 630: size_t wrote;
! 631: ptr = optr;
! 632: len = olen;
! 633: Curl_set_in_callback(data, true);
! 634: wrote = writeheader(ptr, 1, len, data->set.writeheader);
! 635: Curl_set_in_callback(data, false);
! 636:
! 637: if(CURL_WRITEFUNC_PAUSE == wrote)
! 638: /* here we pass in the HEADER bit only since if this was body as well
! 639: then it was passed already and clearly that didn't trigger the
! 640: pause, so this is saved for later with the HEADER bit only */
! 641: return pausewrite(data, CLIENTWRITE_HEADER, ptr, len);
! 642:
! 643: if(wrote != len) {
! 644: failf(data, "Failed writing header");
! 645: return CURLE_WRITE_ERROR;
! 646: }
! 647: }
! 648:
! 649: return CURLE_OK;
! 650: }
! 651:
! 652:
! 653: /* Curl_client_write() sends data to the write callback(s)
! 654:
! 655: The bit pattern defines to what "streams" to write to. Body and/or header.
! 656: The defines are in sendf.h of course.
! 657:
! 658: If CURL_DO_LINEEND_CONV is enabled, data is converted IN PLACE to the
! 659: local character encoding. This is a problem and should be changed in
! 660: the future to leave the original data alone.
! 661: */
! 662: CURLcode Curl_client_write(struct connectdata *conn,
! 663: int type,
! 664: char *ptr,
! 665: size_t len)
! 666: {
! 667: struct Curl_easy *data = conn->data;
! 668:
! 669: if(0 == len)
! 670: len = strlen(ptr);
! 671:
! 672: DEBUGASSERT(type <= 3);
! 673:
! 674: /* FTP data may need conversion. */
! 675: if((type & CLIENTWRITE_BODY) &&
! 676: (conn->handler->protocol & PROTO_FAMILY_FTP) &&
! 677: conn->proto.ftpc.transfertype == 'A') {
! 678: /* convert from the network encoding */
! 679: CURLcode result = Curl_convert_from_network(data, ptr, len);
! 680: /* Curl_convert_from_network calls failf if unsuccessful */
! 681: if(result)
! 682: return result;
! 683:
! 684: #ifdef CURL_DO_LINEEND_CONV
! 685: /* convert end-of-line markers */
! 686: len = convert_lineends(data, ptr, len);
! 687: #endif /* CURL_DO_LINEEND_CONV */
! 688: }
! 689:
! 690: return chop_write(conn, type, ptr, len);
! 691: }
! 692:
! 693: CURLcode Curl_read_plain(curl_socket_t sockfd,
! 694: char *buf,
! 695: size_t bytesfromsocket,
! 696: ssize_t *n)
! 697: {
! 698: ssize_t nread = sread(sockfd, buf, bytesfromsocket);
! 699:
! 700: if(-1 == nread) {
! 701: const int err = SOCKERRNO;
! 702: const bool return_error =
! 703: #ifdef USE_WINSOCK
! 704: WSAEWOULDBLOCK == err
! 705: #else
! 706: EWOULDBLOCK == err || EAGAIN == err || EINTR == err
! 707: #endif
! 708: ;
! 709: *n = 0; /* no data returned */
! 710: if(return_error)
! 711: return CURLE_AGAIN;
! 712: return CURLE_RECV_ERROR;
! 713: }
! 714:
! 715: *n = nread;
! 716: return CURLE_OK;
! 717: }
! 718:
! 719: /*
! 720: * Internal read-from-socket function. This is meant to deal with plain
! 721: * sockets, SSL sockets and kerberos sockets.
! 722: *
! 723: * Returns a regular CURLcode value.
! 724: */
! 725: CURLcode Curl_read(struct connectdata *conn, /* connection data */
! 726: curl_socket_t sockfd, /* read from this socket */
! 727: char *buf, /* store read data here */
! 728: size_t sizerequested, /* max amount to read */
! 729: ssize_t *n) /* amount bytes read */
! 730: {
! 731: CURLcode result = CURLE_RECV_ERROR;
! 732: ssize_t nread = 0;
! 733: size_t bytesfromsocket = 0;
! 734: char *buffertofill = NULL;
! 735: struct Curl_easy *data = conn->data;
! 736:
! 737: /* Set 'num' to 0 or 1, depending on which socket that has been sent here.
! 738: If it is the second socket, we set num to 1. Otherwise to 0. This lets
! 739: us use the correct ssl handle. */
! 740: int num = (sockfd == conn->sock[SECONDARYSOCKET]);
! 741:
! 742: *n = 0; /* reset amount to zero */
! 743:
! 744: bytesfromsocket = CURLMIN(sizerequested, (size_t)data->set.buffer_size);
! 745: buffertofill = buf;
! 746:
! 747: nread = conn->recv[num](conn, num, buffertofill, bytesfromsocket, &result);
! 748: if(nread < 0)
! 749: return result;
! 750:
! 751: *n += nread;
! 752:
! 753: return CURLE_OK;
! 754: }
! 755:
! 756: /* return 0 on success */
! 757: int Curl_debug(struct Curl_easy *data, curl_infotype type,
! 758: char *ptr, size_t size)
! 759: {
! 760: static const char s_infotype[CURLINFO_END][3] = {
! 761: "* ", "< ", "> ", "{ ", "} ", "{ ", "} " };
! 762: int rc = 0;
! 763:
! 764: #ifdef CURL_DOES_CONVERSIONS
! 765: char *buf = NULL;
! 766: size_t conv_size = 0;
! 767:
! 768: switch(type) {
! 769: case CURLINFO_HEADER_OUT:
! 770: buf = Curl_memdup(ptr, size);
! 771: if(!buf)
! 772: return 1;
! 773: conv_size = size;
! 774:
! 775: /* Special processing is needed for this block if it
! 776: * contains both headers and data (separated by CRLFCRLF).
! 777: * We want to convert just the headers, leaving the data as-is.
! 778: */
! 779: if(size > 4) {
! 780: size_t i;
! 781: for(i = 0; i < size-4; i++) {
! 782: if(memcmp(&buf[i], "\x0d\x0a\x0d\x0a", 4) == 0) {
! 783: /* convert everything through this CRLFCRLF but no further */
! 784: conv_size = i + 4;
! 785: break;
! 786: }
! 787: }
! 788: }
! 789:
! 790: Curl_convert_from_network(data, buf, conv_size);
! 791: /* Curl_convert_from_network calls failf if unsuccessful */
! 792: /* we might as well continue even if it fails... */
! 793: ptr = buf; /* switch pointer to use my buffer instead */
! 794: break;
! 795: default:
! 796: /* leave everything else as-is */
! 797: break;
! 798: }
! 799: #endif /* CURL_DOES_CONVERSIONS */
! 800:
! 801: if(data->set.fdebug) {
! 802: Curl_set_in_callback(data, true);
! 803: rc = (*data->set.fdebug)(data, type, ptr, size, data->set.debugdata);
! 804: Curl_set_in_callback(data, false);
! 805: }
! 806: else {
! 807: switch(type) {
! 808: case CURLINFO_TEXT:
! 809: case CURLINFO_HEADER_OUT:
! 810: case CURLINFO_HEADER_IN:
! 811: fwrite(s_infotype[type], 2, 1, data->set.err);
! 812: fwrite(ptr, size, 1, data->set.err);
! 813: #ifdef CURL_DOES_CONVERSIONS
! 814: if(size != conv_size) {
! 815: /* we had untranslated data so we need an explicit newline */
! 816: fwrite("\n", 1, 1, data->set.err);
! 817: }
! 818: #endif
! 819: break;
! 820: default: /* nada */
! 821: break;
! 822: }
! 823: }
! 824: #ifdef CURL_DOES_CONVERSIONS
! 825: free(buf);
! 826: #endif
! 827: return rc;
! 828: }
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