258 lines
6 KiB
C++
258 lines
6 KiB
C++
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2018 Andy Green <andy@warmcat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* This is included from core/private.h if either H1 or H2 roles are
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* enabled
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*/
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#if defined(LWS_WITH_HTTP_PROXY)
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#include <hubbub/hubbub.h>
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#include <hubbub/parser.h>
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#endif
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#define lwsi_role_http(wsi) (lwsi_role_h1(wsi) || lwsi_role_h2(wsi))
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enum http_version {
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HTTP_VERSION_1_0,
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HTTP_VERSION_1_1,
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HTTP_VERSION_2
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};
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enum http_connection_type {
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HTTP_CONNECTION_CLOSE,
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HTTP_CONNECTION_KEEP_ALIVE
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};
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/*
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* This is totally opaque to code using the library. It's exported as a
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* forward-reference pointer-only declaration; the user can use the pointer with
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* other APIs to get information out of it.
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*/
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#if defined(LWS_WITH_ESP32)
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typedef uint16_t ah_data_idx_t;
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#else
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typedef uint32_t ah_data_idx_t;
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#endif
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struct lws_fragments {
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ah_data_idx_t offset;
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uint16_t len;
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uint8_t nfrag; /* which ah->frag[] continues this content, or 0 */
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uint8_t flags; /* only http2 cares */
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};
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#if defined(LWS_WITH_RANGES)
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enum range_states {
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LWSRS_NO_ACTIVE_RANGE,
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LWSRS_BYTES_EQ,
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LWSRS_FIRST,
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LWSRS_STARTING,
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LWSRS_ENDING,
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LWSRS_COMPLETED,
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LWSRS_SYNTAX,
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};
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struct lws_range_parsing {
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unsigned long long start, end, extent, agg, budget;
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const char buf[128];
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int pos;
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enum range_states state;
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char start_valid, end_valid, ctr, count_ranges, did_try, inside, send_ctr;
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};
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int
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lws_ranges_init(struct lws *wsi, struct lws_range_parsing *rp,
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unsigned long long extent);
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int
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lws_ranges_next(struct lws_range_parsing *rp);
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void
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lws_ranges_reset(struct lws_range_parsing *rp);
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#endif
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/*
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* these are assigned from a pool held in the context.
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* Both client and server mode uses them for http header analysis
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*/
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struct allocated_headers {
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struct allocated_headers *next; /* linked list */
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struct lws *wsi; /* owner */
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char *data; /* prepared by context init to point to dedicated storage */
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ah_data_idx_t data_length;
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/*
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* the randomly ordered fragments, indexed by frag_index and
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* lws_fragments->nfrag for continuation.
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*/
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struct lws_fragments frags[WSI_TOKEN_COUNT];
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time_t assigned;
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/*
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* for each recognized token, frag_index says which frag[] his data
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* starts in (0 means the token did not appear)
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* the actual header data gets dumped as it comes in, into data[]
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*/
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uint8_t frag_index[WSI_TOKEN_COUNT];
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#ifndef LWS_NO_CLIENT
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char initial_handshake_hash_base64[30];
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#endif
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uint32_t pos;
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uint32_t http_response;
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uint32_t current_token_limit;
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int hdr_token_idx;
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int16_t lextable_pos;
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uint8_t in_use;
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uint8_t nfrag;
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char /*enum uri_path_states */ ups;
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char /*enum uri_esc_states */ ues;
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char esc_stash;
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char post_literal_equal;
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uint8_t /* enum lws_token_indexes */ parser_state;
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};
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#if defined(LWS_WITH_HTTP_PROXY)
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struct lws_rewrite {
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hubbub_parser *parser;
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hubbub_parser_optparams params;
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const char *from, *to;
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int from_len, to_len;
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unsigned char *p, *end;
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struct lws *wsi;
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};
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static LWS_INLINE int hstrcmp(hubbub_string *s, const char *p, int len)
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{
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if ((int)s->len != len)
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return 1;
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return strncmp((const char *)s->ptr, p, len);
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}
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typedef hubbub_error (*hubbub_callback_t)(const hubbub_token *token, void *pw);
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LWS_EXTERN struct lws_rewrite *
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lws_rewrite_create(struct lws *wsi, hubbub_callback_t cb, const char *from, const char *to);
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LWS_EXTERN void
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lws_rewrite_destroy(struct lws_rewrite *r);
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LWS_EXTERN int
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lws_rewrite_parse(struct lws_rewrite *r, const unsigned char *in, int in_len);
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#endif
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struct lws_pt_role_http {
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struct allocated_headers *ah_list;
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struct lws *ah_wait_list;
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#ifdef LWS_WITH_CGI
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struct lws_cgi *cgi_list;
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#endif
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int ah_wait_list_length;
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uint32_t ah_pool_length;
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int ah_count_in_use;
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};
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struct lws_peer_role_http {
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uint32_t count_ah;
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uint32_t total_ah;
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};
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struct lws_vhost_role_http {
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char http_proxy_address[128];
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const struct lws_http_mount *mount_list;
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const char *error_document_404;
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unsigned int http_proxy_port;
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};
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#ifdef LWS_WITH_ACCESS_LOG
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struct lws_access_log {
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char *header_log;
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char *user_agent;
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char *referrer;
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unsigned long sent;
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int response;
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};
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#endif
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struct _lws_http_mode_related {
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struct lws *new_wsi_list;
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#if defined(LWS_WITH_HTTP_PROXY)
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struct lws_rewrite *rw;
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#endif
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struct allocated_headers *ah;
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struct lws *ah_wait_list;
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lws_filepos_t filepos;
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lws_filepos_t filelen;
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lws_fop_fd_t fop_fd;
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#if defined(LWS_WITH_RANGES)
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struct lws_range_parsing range;
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char multipart_content_type[64];
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#endif
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#ifdef LWS_WITH_ACCESS_LOG
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struct lws_access_log access_log;
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#endif
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#ifdef LWS_WITH_CGI
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struct lws_cgi *cgi; /* wsi being cgi master have one of these */
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#endif
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enum http_version request_version;
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enum http_connection_type connection_type;
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lws_filepos_t tx_content_length;
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lws_filepos_t tx_content_remain;
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lws_filepos_t rx_content_length;
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lws_filepos_t rx_content_remain;
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#if defined(LWS_WITH_HTTP_PROXY)
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unsigned int perform_rewrite:1;
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#endif
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unsigned int deferred_transaction_completed:1;
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};
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#ifndef LWS_NO_CLIENT
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enum lws_chunk_parser {
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ELCP_HEX,
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ELCP_CR,
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ELCP_CONTENT,
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ELCP_POST_CR,
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ELCP_POST_LF,
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};
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#endif
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enum lws_parse_urldecode_results {
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LPUR_CONTINUE,
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LPUR_SWALLOW,
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LPUR_FORBID,
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LPUR_EXCESSIVE,
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};
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int
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lws_read_h1(struct lws *wsi, unsigned char *buf, lws_filepos_t len);
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void
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_lws_header_table_reset(struct allocated_headers *ah);
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LWS_EXTERN int
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_lws_destroy_ah(struct lws_context_per_thread *pt, struct allocated_headers *ah);
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