164 lines
4.6 KiB
C++
164 lines
4.6 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 LWS_ROLE_WS
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*/
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extern struct lws_role_ops role_ops_ws;
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#define lwsi_role_ws(wsi) (wsi->role_ops == &role_ops_ws)
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enum lws_rx_parse_state {
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LWS_RXPS_NEW,
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LWS_RXPS_04_mask_1,
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LWS_RXPS_04_mask_2,
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LWS_RXPS_04_mask_3,
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LWS_RXPS_04_FRAME_HDR_1,
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LWS_RXPS_04_FRAME_HDR_LEN,
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LWS_RXPS_04_FRAME_HDR_LEN16_2,
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LWS_RXPS_04_FRAME_HDR_LEN16_1,
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LWS_RXPS_04_FRAME_HDR_LEN64_8,
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LWS_RXPS_04_FRAME_HDR_LEN64_7,
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LWS_RXPS_04_FRAME_HDR_LEN64_6,
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LWS_RXPS_04_FRAME_HDR_LEN64_5,
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LWS_RXPS_04_FRAME_HDR_LEN64_4,
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LWS_RXPS_04_FRAME_HDR_LEN64_3,
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LWS_RXPS_04_FRAME_HDR_LEN64_2,
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LWS_RXPS_04_FRAME_HDR_LEN64_1,
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LWS_RXPS_07_COLLECT_FRAME_KEY_1,
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LWS_RXPS_07_COLLECT_FRAME_KEY_2,
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LWS_RXPS_07_COLLECT_FRAME_KEY_3,
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LWS_RXPS_07_COLLECT_FRAME_KEY_4,
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LWS_RXPS_WS_FRAME_PAYLOAD
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};
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enum lws_websocket_opcodes_07 {
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LWSWSOPC_CONTINUATION = 0,
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LWSWSOPC_TEXT_FRAME = 1,
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LWSWSOPC_BINARY_FRAME = 2,
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LWSWSOPC_NOSPEC__MUX = 7,
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/* control extensions 8+ */
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LWSWSOPC_CLOSE = 8,
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LWSWSOPC_PING = 9,
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LWSWSOPC_PONG = 0xa,
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};
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/* this is not usable directly by user code any more, lws_close_reason() */
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#define LWS_WRITE_CLOSE 4
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#define ALREADY_PROCESSED_IGNORE_CHAR 1
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#define ALREADY_PROCESSED_NO_CB 2
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#if !defined(LWS_WITHOUT_EXTENSIONS)
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struct lws_vhost_role_ws {
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const struct lws_extension *extensions;
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};
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struct lws_pt_role_ws {
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struct lws *rx_draining_ext_list;
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struct lws *tx_draining_ext_list;
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};
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#endif
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struct _lws_websocket_related {
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char *rx_ubuf;
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#if !defined(LWS_WITHOUT_EXTENSIONS)
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const struct lws_extension *active_extensions[LWS_MAX_EXTENSIONS_ACTIVE];
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void *act_ext_user[LWS_MAX_EXTENSIONS_ACTIVE];
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struct lws *rx_draining_ext_list;
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struct lws *tx_draining_ext_list;
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#endif
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/* Also used for close content... control opcode == < 128 */
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uint8_t ping_payload_buf[128 - 3 + LWS_PRE];
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uint8_t mask[4];
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time_t time_next_ping_check;
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size_t rx_packet_length;
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uint32_t rx_ubuf_head;
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uint32_t rx_ubuf_alloc;
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uint8_t ping_payload_len;
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uint8_t mask_idx;
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uint8_t opcode;
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uint8_t rsv;
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uint8_t rsv_first_msg;
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/* zero if no info, or length including 2-byte close code */
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uint8_t close_in_ping_buffer_len;
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uint8_t utf8;
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uint8_t stashed_write_type;
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uint8_t tx_draining_stashed_wp;
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uint8_t ietf_spec_revision;
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unsigned int final:1;
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unsigned int frame_is_binary:1;
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unsigned int all_zero_nonce:1;
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unsigned int this_frame_masked:1;
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unsigned int inside_frame:1; /* next write will be more of frame */
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unsigned int clean_buffer:1; /* buffer not rewritten by extension */
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unsigned int payload_is_close:1; /* process as PONG, but it is close */
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unsigned int ping_pending_flag:1;
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unsigned int continuation_possible:1;
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unsigned int owed_a_fin:1;
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unsigned int check_utf8:1;
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unsigned int defeat_check_utf8:1;
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unsigned int stashed_write_pending:1;
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unsigned int send_check_ping:1;
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unsigned int first_fragment:1;
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unsigned int peer_has_sent_close:1;
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#if !defined(LWS_WITHOUT_EXTENSIONS)
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unsigned int extension_data_pending:1;
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unsigned int rx_draining_ext:1;
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unsigned int tx_draining_ext:1;
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uint8_t count_act_ext;
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#endif
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};
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int
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lws_ws_handshake_client(struct lws *wsi, unsigned char **buf, size_t len);
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#if !defined(LWS_WITHOUT_EXTENSIONS)
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LWS_VISIBLE void
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lws_context_init_extensions(const struct lws_context_creation_info *info,
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struct lws_context *context);
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LWS_EXTERN int
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lws_any_extension_handled(struct lws *wsi, enum lws_extension_callback_reasons r,
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void *v, size_t len);
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LWS_EXTERN int
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lws_ext_cb_active(struct lws *wsi, int reason, void *buf, int len);
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LWS_EXTERN int
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lws_ext_cb_all_exts(struct lws_context *context, struct lws *wsi, int reason,
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void *arg, int len);
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#endif
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int
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handshake_0405(struct lws_context *context, struct lws *wsi);
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int
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lws_process_ws_upgrade(struct lws *wsi);
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int
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lws_server_init_wsi_for_ws(struct lws *wsi);
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