From 47b6881fe726c904f87aa4be059b730ef77954d0 Mon Sep 17 00:00:00 2001 From: dartraiden Date: Thu, 22 Dec 2022 16:31:20 +0300 Subject: libcurl: update to 7.87.0 --- libs/libcurl/src/h2h3.c | 618 ++++++++++++++++++++++++------------------------ 1 file changed, 309 insertions(+), 309 deletions(-) (limited to 'libs/libcurl/src/h2h3.c') diff --git a/libs/libcurl/src/h2h3.c b/libs/libcurl/src/h2h3.c index 50254ad0fa..fb301b4cbb 100644 --- a/libs/libcurl/src/h2h3.c +++ b/libs/libcurl/src/h2h3.c @@ -1,309 +1,309 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2022, Daniel Stenberg, , 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.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. - * - * SPDX-License-Identifier: curl - * - ***************************************************************************/ - -#include "curl_setup.h" -#include "urldata.h" -#include "h2h3.h" -#include "transfer.h" -#include "sendf.h" -#include "strcase.h" - -/* The last 3 #include files should be in this order */ -#include "curl_printf.h" -#include "curl_memory.h" -#include "memdebug.h" - -/* - * Curl_pseudo_headers() creates the array with pseudo headers to be - * used in a HTTP/2 or HTTP/3 request. - */ - -#if defined(USE_NGHTTP2) || defined(ENABLE_QUIC) - -/* Index where :authority header field will appear in request header - field list. */ -#define AUTHORITY_DST_IDX 3 - -/* USHRT_MAX is 65535 == 0xffff */ -#define HEADER_OVERFLOW(x) \ - (x.namelen > 0xffff || x.valuelen > 0xffff - x.namelen) - -/* - * Check header memory for the token "trailers". - * Parse the tokens as separated by comma and surrounded by whitespace. - * Returns TRUE if found or FALSE if not. - */ -static bool contains_trailers(const char *p, size_t len) -{ - const char *end = p + len; - for(;;) { - for(; p != end && (*p == ' ' || *p == '\t'); ++p) - ; - if(p == end || (size_t)(end - p) < sizeof("trailers") - 1) - return FALSE; - if(strncasecompare("trailers", p, sizeof("trailers") - 1)) { - p += sizeof("trailers") - 1; - for(; p != end && (*p == ' ' || *p == '\t'); ++p) - ; - if(p == end || *p == ',') - return TRUE; - } - /* skip to next token */ - for(; p != end && *p != ','; ++p) - ; - if(p == end) - return FALSE; - ++p; - } -} - -typedef enum { - /* Send header to server */ - HEADERINST_FORWARD, - /* Don't send header to server */ - HEADERINST_IGNORE, - /* Discard header, and replace it with "te: trailers" */ - HEADERINST_TE_TRAILERS -} header_instruction; - -/* Decides how to treat given header field. */ -static header_instruction inspect_header(const char *name, size_t namelen, - const char *value, size_t valuelen) { - switch(namelen) { - case 2: - if(!strncasecompare("te", name, namelen)) - return HEADERINST_FORWARD; - - return contains_trailers(value, valuelen) ? - HEADERINST_TE_TRAILERS : HEADERINST_IGNORE; - case 7: - return strncasecompare("upgrade", name, namelen) ? - HEADERINST_IGNORE : HEADERINST_FORWARD; - case 10: - return (strncasecompare("connection", name, namelen) || - strncasecompare("keep-alive", name, namelen)) ? - HEADERINST_IGNORE : HEADERINST_FORWARD; - case 16: - return strncasecompare("proxy-connection", name, namelen) ? - HEADERINST_IGNORE : HEADERINST_FORWARD; - case 17: - return strncasecompare("transfer-encoding", name, namelen) ? - HEADERINST_IGNORE : HEADERINST_FORWARD; - default: - return HEADERINST_FORWARD; - } -} - -CURLcode Curl_pseudo_headers(struct Curl_easy *data, - const char *mem, /* the request */ - const size_t len /* size of request */, - struct h2h3req **hp) -{ - struct connectdata *conn = data->conn; - size_t nheader = 0; - size_t i; - size_t authority_idx; - char *hdbuf = (char *)mem; - char *end, *line_end; - struct h2h3pseudo *nva = NULL; - struct h2h3req *hreq = NULL; - char *vptr; - - /* Calculate number of headers contained in [mem, mem + len). Assumes a - correctly generated HTTP header field block. */ - for(i = 1; i < len; ++i) { - if(hdbuf[i] == '\n' && hdbuf[i - 1] == '\r') { - ++nheader; - ++i; - } - } - if(nheader < 2) { - goto fail; - } - /* We counted additional 2 \r\n in the first and last line. We need 3 - new headers: :method, :path and :scheme. Therefore we need one - more space. */ - nheader += 1; - hreq = malloc(sizeof(struct h2h3req) + - sizeof(struct h2h3pseudo) * (nheader - 1)); - if(!hreq) { - goto fail; - } - - nva = &hreq->header[0]; - - /* Extract :method, :path from request line - We do line endings with CRLF so checking for CR is enough */ - line_end = memchr(hdbuf, '\r', len); - if(!line_end) { - goto fail; - } - - /* Method does not contain spaces */ - end = memchr(hdbuf, ' ', line_end - hdbuf); - if(!end || end == hdbuf) - goto fail; - nva[0].name = H2H3_PSEUDO_METHOD; - nva[0].namelen = sizeof(H2H3_PSEUDO_METHOD) - 1; - nva[0].value = hdbuf; - nva[0].valuelen = (size_t)(end - hdbuf); - - hdbuf = end + 1; - - /* Path may contain spaces so scan backwards */ - end = NULL; - for(i = (size_t)(line_end - hdbuf); i; --i) { - if(hdbuf[i - 1] == ' ') { - end = &hdbuf[i - 1]; - break; - } - } - if(!end || end == hdbuf) - goto fail; - nva[1].name = H2H3_PSEUDO_PATH; - nva[1].namelen = sizeof(H2H3_PSEUDO_PATH) - 1; - nva[1].value = hdbuf; - nva[1].valuelen = (end - hdbuf); - - nva[2].name = H2H3_PSEUDO_SCHEME; - nva[2].namelen = sizeof(H2H3_PSEUDO_SCHEME) - 1; - vptr = Curl_checkheaders(data, STRCONST(H2H3_PSEUDO_SCHEME)); - if(vptr) { - vptr += sizeof(H2H3_PSEUDO_SCHEME); - while(*vptr && ISBLANK(*vptr)) - vptr++; - nva[2].value = vptr; - infof(data, "set pseudo header %s to %s", H2H3_PSEUDO_SCHEME, vptr); - } - else { - if(conn->handler->flags & PROTOPT_SSL) - nva[2].value = "https"; - else - nva[2].value = "http"; - } - nva[2].valuelen = strlen((char *)nva[2].value); - - authority_idx = 0; - i = 3; - while(i < nheader) { - size_t hlen; - - hdbuf = line_end + 2; - - /* check for next CR, but only within the piece of data left in the given - buffer */ - line_end = memchr(hdbuf, '\r', len - (hdbuf - (char *)mem)); - if(!line_end || (line_end == hdbuf)) - goto fail; - - /* header continuation lines are not supported */ - if(*hdbuf == ' ' || *hdbuf == '\t') - goto fail; - - for(end = hdbuf; end < line_end && *end != ':'; ++end) - ; - if(end == hdbuf || end == line_end) - goto fail; - hlen = end - hdbuf; - - if(hlen == 4 && strncasecompare("host", hdbuf, 4)) { - authority_idx = i; - nva[i].name = H2H3_PSEUDO_AUTHORITY; - nva[i].namelen = sizeof(H2H3_PSEUDO_AUTHORITY) - 1; - } - else { - nva[i].namelen = (size_t)(end - hdbuf); - /* Lower case the header name for HTTP/3 */ - Curl_strntolower((char *)hdbuf, hdbuf, nva[i].namelen); - nva[i].name = hdbuf; - } - hdbuf = end + 1; - while(*hdbuf == ' ' || *hdbuf == '\t') - ++hdbuf; - end = line_end; - - switch(inspect_header((const char *)nva[i].name, nva[i].namelen, hdbuf, - end - hdbuf)) { - case HEADERINST_IGNORE: - /* skip header fields prohibited by HTTP/2 specification. */ - --nheader; - continue; - case HEADERINST_TE_TRAILERS: - nva[i].value = "trailers"; - nva[i].valuelen = sizeof("trailers") - 1; - break; - default: - nva[i].value = hdbuf; - nva[i].valuelen = (end - hdbuf); - } - - ++i; - } - - /* :authority must come before non-pseudo header fields */ - if(authority_idx && authority_idx != AUTHORITY_DST_IDX) { - struct h2h3pseudo authority = nva[authority_idx]; - for(i = authority_idx; i > AUTHORITY_DST_IDX; --i) { - nva[i] = nva[i - 1]; - } - nva[i] = authority; - } - - /* Warn stream may be rejected if cumulative length of headers is too - large. */ -#define MAX_ACC 60000 /* <64KB to account for some overhead */ - { - size_t acc = 0; - - for(i = 0; i < nheader; ++i) { - acc += nva[i].namelen + nva[i].valuelen; - - infof(data, "h2h3 [%.*s: %.*s]", - (int)nva[i].namelen, nva[i].name, - (int)nva[i].valuelen, nva[i].value); - } - - if(acc > MAX_ACC) { - infof(data, "http_request: Warning: The cumulative length of all " - "headers exceeds %d bytes and that could cause the " - "stream to be rejected.", MAX_ACC); - } - } - - hreq->entries = nheader; - *hp = hreq; - - return CURLE_OK; - - fail: - free(hreq); - return CURLE_OUT_OF_MEMORY; -} - -void Curl_pseudo_free(struct h2h3req *hp) -{ - free(hp); -} - -#endif /* USE_NGHTTP2 or HTTP/3 enabled */ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2022, Daniel Stenberg, , 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.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. + * + * SPDX-License-Identifier: curl + * + ***************************************************************************/ + +#include "curl_setup.h" +#include "urldata.h" +#include "h2h3.h" +#include "transfer.h" +#include "sendf.h" +#include "strcase.h" + +/* The last 3 #include files should be in this order */ +#include "curl_printf.h" +#include "curl_memory.h" +#include "memdebug.h" + +/* + * Curl_pseudo_headers() creates the array with pseudo headers to be + * used in an HTTP/2 or HTTP/3 request. + */ + +#if defined(USE_NGHTTP2) || defined(ENABLE_QUIC) + +/* Index where :authority header field will appear in request header + field list. */ +#define AUTHORITY_DST_IDX 3 + +/* USHRT_MAX is 65535 == 0xffff */ +#define HEADER_OVERFLOW(x) \ + (x.namelen > 0xffff || x.valuelen > 0xffff - x.namelen) + +/* + * Check header memory for the token "trailers". + * Parse the tokens as separated by comma and surrounded by whitespace. + * Returns TRUE if found or FALSE if not. + */ +static bool contains_trailers(const char *p, size_t len) +{ + const char *end = p + len; + for(;;) { + for(; p != end && (*p == ' ' || *p == '\t'); ++p) + ; + if(p == end || (size_t)(end - p) < sizeof("trailers") - 1) + return FALSE; + if(strncasecompare("trailers", p, sizeof("trailers") - 1)) { + p += sizeof("trailers") - 1; + for(; p != end && (*p == ' ' || *p == '\t'); ++p) + ; + if(p == end || *p == ',') + return TRUE; + } + /* skip to next token */ + for(; p != end && *p != ','; ++p) + ; + if(p == end) + return FALSE; + ++p; + } +} + +typedef enum { + /* Send header to server */ + HEADERINST_FORWARD, + /* Don't send header to server */ + HEADERINST_IGNORE, + /* Discard header, and replace it with "te: trailers" */ + HEADERINST_TE_TRAILERS +} header_instruction; + +/* Decides how to treat given header field. */ +static header_instruction inspect_header(const char *name, size_t namelen, + const char *value, size_t valuelen) { + switch(namelen) { + case 2: + if(!strncasecompare("te", name, namelen)) + return HEADERINST_FORWARD; + + return contains_trailers(value, valuelen) ? + HEADERINST_TE_TRAILERS : HEADERINST_IGNORE; + case 7: + return strncasecompare("upgrade", name, namelen) ? + HEADERINST_IGNORE : HEADERINST_FORWARD; + case 10: + return (strncasecompare("connection", name, namelen) || + strncasecompare("keep-alive", name, namelen)) ? + HEADERINST_IGNORE : HEADERINST_FORWARD; + case 16: + return strncasecompare("proxy-connection", name, namelen) ? + HEADERINST_IGNORE : HEADERINST_FORWARD; + case 17: + return strncasecompare("transfer-encoding", name, namelen) ? + HEADERINST_IGNORE : HEADERINST_FORWARD; + default: + return HEADERINST_FORWARD; + } +} + +CURLcode Curl_pseudo_headers(struct Curl_easy *data, + const char *mem, /* the request */ + const size_t len /* size of request */, + struct h2h3req **hp) +{ + struct connectdata *conn = data->conn; + size_t nheader = 0; + size_t i; + size_t authority_idx; + char *hdbuf = (char *)mem; + char *end, *line_end; + struct h2h3pseudo *nva = NULL; + struct h2h3req *hreq = NULL; + char *vptr; + + /* Calculate number of headers contained in [mem, mem + len). Assumes a + correctly generated HTTP header field block. */ + for(i = 1; i < len; ++i) { + if(hdbuf[i] == '\n' && hdbuf[i - 1] == '\r') { + ++nheader; + ++i; + } + } + if(nheader < 2) { + goto fail; + } + /* We counted additional 2 \r\n in the first and last line. We need 3 + new headers: :method, :path and :scheme. Therefore we need one + more space. */ + nheader += 1; + hreq = malloc(sizeof(struct h2h3req) + + sizeof(struct h2h3pseudo) * (nheader - 1)); + if(!hreq) { + goto fail; + } + + nva = &hreq->header[0]; + + /* Extract :method, :path from request line + We do line endings with CRLF so checking for CR is enough */ + line_end = memchr(hdbuf, '\r', len); + if(!line_end) { + goto fail; + } + + /* Method does not contain spaces */ + end = memchr(hdbuf, ' ', line_end - hdbuf); + if(!end || end == hdbuf) + goto fail; + nva[0].name = H2H3_PSEUDO_METHOD; + nva[0].namelen = sizeof(H2H3_PSEUDO_METHOD) - 1; + nva[0].value = hdbuf; + nva[0].valuelen = (size_t)(end - hdbuf); + + hdbuf = end + 1; + + /* Path may contain spaces so scan backwards */ + end = NULL; + for(i = (size_t)(line_end - hdbuf); i; --i) { + if(hdbuf[i - 1] == ' ') { + end = &hdbuf[i - 1]; + break; + } + } + if(!end || end == hdbuf) + goto fail; + nva[1].name = H2H3_PSEUDO_PATH; + nva[1].namelen = sizeof(H2H3_PSEUDO_PATH) - 1; + nva[1].value = hdbuf; + nva[1].valuelen = (end - hdbuf); + + nva[2].name = H2H3_PSEUDO_SCHEME; + nva[2].namelen = sizeof(H2H3_PSEUDO_SCHEME) - 1; + vptr = Curl_checkheaders(data, STRCONST(H2H3_PSEUDO_SCHEME)); + if(vptr) { + vptr += sizeof(H2H3_PSEUDO_SCHEME); + while(*vptr && ISBLANK(*vptr)) + vptr++; + nva[2].value = vptr; + infof(data, "set pseudo header %s to %s", H2H3_PSEUDO_SCHEME, vptr); + } + else { + if(conn->handler->flags & PROTOPT_SSL) + nva[2].value = "https"; + else + nva[2].value = "http"; + } + nva[2].valuelen = strlen((char *)nva[2].value); + + authority_idx = 0; + i = 3; + while(i < nheader) { + size_t hlen; + + hdbuf = line_end + 2; + + /* check for next CR, but only within the piece of data left in the given + buffer */ + line_end = memchr(hdbuf, '\r', len - (hdbuf - (char *)mem)); + if(!line_end || (line_end == hdbuf)) + goto fail; + + /* header continuation lines are not supported */ + if(*hdbuf == ' ' || *hdbuf == '\t') + goto fail; + + for(end = hdbuf; end < line_end && *end != ':'; ++end) + ; + if(end == hdbuf || end == line_end) + goto fail; + hlen = end - hdbuf; + + if(hlen == 4 && strncasecompare("host", hdbuf, 4)) { + authority_idx = i; + nva[i].name = H2H3_PSEUDO_AUTHORITY; + nva[i].namelen = sizeof(H2H3_PSEUDO_AUTHORITY) - 1; + } + else { + nva[i].namelen = (size_t)(end - hdbuf); + /* Lower case the header name for HTTP/3 */ + Curl_strntolower((char *)hdbuf, hdbuf, nva[i].namelen); + nva[i].name = hdbuf; + } + hdbuf = end + 1; + while(*hdbuf == ' ' || *hdbuf == '\t') + ++hdbuf; + end = line_end; + + switch(inspect_header((const char *)nva[i].name, nva[i].namelen, hdbuf, + end - hdbuf)) { + case HEADERINST_IGNORE: + /* skip header fields prohibited by HTTP/2 specification. */ + --nheader; + continue; + case HEADERINST_TE_TRAILERS: + nva[i].value = "trailers"; + nva[i].valuelen = sizeof("trailers") - 1; + break; + default: + nva[i].value = hdbuf; + nva[i].valuelen = (end - hdbuf); + } + + ++i; + } + + /* :authority must come before non-pseudo header fields */ + if(authority_idx && authority_idx != AUTHORITY_DST_IDX) { + struct h2h3pseudo authority = nva[authority_idx]; + for(i = authority_idx; i > AUTHORITY_DST_IDX; --i) { + nva[i] = nva[i - 1]; + } + nva[i] = authority; + } + + /* Warn stream may be rejected if cumulative length of headers is too + large. */ +#define MAX_ACC 60000 /* <64KB to account for some overhead */ + { + size_t acc = 0; + + for(i = 0; i < nheader; ++i) { + acc += nva[i].namelen + nva[i].valuelen; + + infof(data, "h2h3 [%.*s: %.*s]", + (int)nva[i].namelen, nva[i].name, + (int)nva[i].valuelen, nva[i].value); + } + + if(acc > MAX_ACC) { + infof(data, "http_request: Warning: The cumulative length of all " + "headers exceeds %d bytes and that could cause the " + "stream to be rejected.", MAX_ACC); + } + } + + hreq->entries = nheader; + *hp = hreq; + + return CURLE_OK; + + fail: + free(hreq); + return CURLE_OUT_OF_MEMORY; +} + +void Curl_pseudo_free(struct h2h3req *hp) +{ + free(hp); +} + +#endif /* USE_NGHTTP2 or HTTP/3 enabled */ -- cgit v1.2.3